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LUA88-093
AVE- _ SE — �� AVENUE t�!E' - Hsu rN — - -� - �o1519p0 N00°O0'26.E 156.43' —�_— 2 56' _ — ND x2 - --- _ _ •:°58'43 __ 40 \ •05PCJcEti f LANI:2 --APc 6urFEri e'ur tri �✓ Q=Q7°O0• •R=1642.00'L=200^61' .....1 ♦_� -- 1 N00°01'17•E 235.93' —¢ 1 I I WETLAND xt �, �, \�j ' NrcSWETLPSIL7 .► IF m (.y r nc ) col-ro� % ��1 �j l•�� m _____L a / col rod ��� °" z _ 1., t` %. # , ___,,..,.,,,,„ ,#y, , .l 1 'l� . �,i` iA� tom` g 138TH GLACE SE .,,,T „, _j___ � — III Alow= ,,i ,t ,„ ,-• , 9, , , _viialil )u0'• . rip . w , _ .. / ,-,-_..._, , .,,,. .,, , ...... 1., %. • , --------..- - . , 0 r- \f" 1 \ z - /00 c At V A. 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N co R' litFai), ivip 1- _ ♦ I • 1111 11III M00.O8'6TE 23. •— — 3 .„,,D ns 1 r- Iv, .r- '\v/// .� �) I III All off\, irri)-*111-1-i, �� ` 1 g r. lyi `rama. ��:. l;111111_ � i�� ` .��: \ �►` al lit [t, -- t I 1 _ -4 clip , of it:. �� •{r:.:.y- • -115P•4`�,i�.�.'' 140TH AVENUE S_E�- -LJWP,iC1•PE 6UPPdi NOO°08'57'E 807.34' ` 40l N I �i�' DE DrGATIOtJ -- cP 0- __ ► C. Source:Johnson Braund Design Group, Inc. Seattle, W. ington. Dated October 15, 19 -- �� /!L r�... J o 80 Aso p� L Q RSV I�TE MIREST CRESTS Renton, Washington MI. Scale in Feet N, Proposed Action ( PACIFIC ` EV is rb Starr RA&) ,q ►pure • -�_ i H o o-- -- ---� `, •AVENUE NE Du pat A�� 01°15'26. -�f d=15 58.00' 26'E 156.43' 6. 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OD 4.. .-,...-.-L;.,,,,,,,,, -,,:.,:ii:..i..,-:.-ipP.,_ 4 /40 .1,,..2)..- - : : _,iU. .�► i � _—_ nVll r p Park Terrace�ereNrlorr• llrAl =' - Subdivision oi :el, `r� • 01 N .4- AtlieI �; —�_,-, - r • - -,. ` _ �,1: I 7-1 , / , i , I iftii 4,70 I. �� IIIII.I.ii. ...:. _1 AND•SCAPE '"� - ‘11�►� ,� ,• _. _ cn co " ( i- 410 ,), :.... -: IAN C 1J �_ i cc ...h. ,, ,_. „. :., 0 ._ • . R��-`�` ._. .. ����//! 1>�, �.� id. r . II!�' III • �^ —J "�` `� :� 1 �" IIII � � �• _ i II 1' �Illr� �lll:. : CD • `\s , `` _ I _.I N00°08'STE 23.0 ' r ;• ,i , ilIIN�I, ,/3 ���� �I' S`111t' �,� II W low ' ; -.-.P. ,\N-- i . 111 EIL 1 .ii, - - ....,,AMES:-•- --- ;.,-: .':-... - ' Ivo - , ,. i . ... Lc) I-7 . ,ik I ILIIII -r_.., -- i I GMCRG,CNCY rccasS T -- -- -- 140TH AVENUE SE viol DEDIGA-rioNt -LANDXiCAPE 5UPP6Z N00°08.57•E 807.34' DSO DnoICATION Source: Johnson Braund Design Group,Inc. Seattle, Washington. Dated October 15,1991 • • 0 80 160 e Scale in Feet N� v FORREST CRESTS Renton, Washington . PACIFIC Proposed Action 18 ' Fr....• sg_ 093 Figure 2 �f . . ,:.,. FOR)", EST CRESTE _ • ry,„......_ MULTI-FAMILY RESIDENTIAL DEVELOPMENT • , . • • , i ....., ........„. ,,...„ht,„„r„,,,,.... .. . . ,,,..„...4,_.,„,..„,,„„,,,,,,,.:„... . .;. turtazientegoul 1....,...,:•:;iii.,!1:;iiitH*rnzl..agu, ........-.....•.-...-..1=-77::::. nr,.... . 1.,,.,=, ,..H.k..it,t ...!!!:;iii.iu:s.:,i,„!•rr..;„,....„„......,..„."...,..r.i,,....„.. n''t.,• M*614.4"TIPr',""4,iiiiii2.41J":12;.!!!:!':thilLif'::1=1-!'"''..,:TT:-!-iiv,m4i,fr:Tr4i-fzr: ::, 4imui.. . ...,.... ..4iiii1:::mr :.v.11;1.1.1r-lt, :.i:iititi, " 11-iii'"":-:-."'ZI.:-.7!rr.rit:*7:i•--.7rl."',7',',7:...:, 7.:= • ..4011,i,m,i,::::,..t.ii.14:,....:;•,!!!%•:vdir/N.:::!ii7. 1%.4-...7...,....„ ,I ';r4+414:ti:•:::.':.;::' frrri.;:iOnn„pi::-. :1.- • :•:'•• , 4---;------• 'i'1 1.1;-1.,...1:7*!47„.,...1, ,.. - .41,,.,,.).11z.,-.11.infq '* " *.-.-..'if44' •••• 144''''''''4":''...--1"'"' '''''. 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ISSUED SEPTEMBER 22, 1992 .4., ., '' . ••4/\irr0 BY THE CITY OF RENTON , . .., . , E :, CITY . �OF RENT ON •ice= Planning/Building/Public Works Department Earl Clymer, Mayor Lynn Guttmann,Administrator November 3, 1992 SUBJECT: Forrest Creste.Mitigation Document Errata Dear Interested Party: It has come to our attention that a correction is required to the Mitigation Document prepared for the proposed Forrest Creste Multi-Family Residential Development. Enclosed is the Errata which describes the error in the description of Fire Services mitigation on Page 17 where Resolution No. 2931 should read No. 2913 and provides a correction. Please attach this Errata to your copy of the Mitigation Document. If you have questions or would like additional information, please contact us at 235-2550. Sincerely, Ateldt Donald K. Erickson, Secretary Environmental Review Committee 200 Mill Avenue South - Renton, Washington 98055 . ERRATA FORREST CRESTE MULTI-FAMILY RESIDENTIAL DEVELOPMENT MITIGATION DOCUMENT ISSUED SEPTEMBER 22, 1992 BY THE CITY OF RENTON B.3. Public Services Section B.3.b.: Fire Services Page 17 Existing Language: Mitigation measures would include provision of Code mandated on-site improvements such as emergency access routes(during construction and operation); hydrants, signage, illumination, alarm systems and sprinklers. The provision of management plans and a surety device to ensure in the preservation of the right-of-way for emergency vehicle travel will be required (see Transportation). The applicant will also be required to participate to a fair share contribution to the City's Fire Benefit District (Resolution #2931)toward the construction of new fire facilities in the City of Renton. The fee for this project would be$388.00 per unit. Correction: Mitigation measures would include provision of Code mandated on-site improvements such as emergency access routes (during construction and operation); hydrants, signage, illumination, alarm systems and sprinklers. The provision of management plans and a surety device to ensure that the preservation of the right-of-way for emergency vehicle travel will be required (see Transportation). The applicant will also be required to participate to a fair share contribution to the City's Fire Benefit District (Resolution#2913)toward the construction of new fire facilities in the City of Renton. The fee for this project would be $388.00 per unit. MITIGATION DOCUMENT - . " FORREST CRESTE MULTI-FAMILY RESIDENTIAL DEVELOPMENT The Environmental Review Committee for the City of Renton issued a Final Environmental Impact Statement for the Forrest Creste Development on September 16, 1992. The EIS for this project has identified a number of possible mitigation measures for adverse environmental impacts that were considered to be significant or potentially significant (as defined by quantitative measures whenever such measures were found to exist). In some cases, such measures do not exist and it was left up to the responsible official to determine whether additional mitigation measures, if any, are warranted to protect the environment. A number of chapters of WAC 197-11 speak directly to the imposition of mitigation measures. The relevant chapters are cited below. WAC 197-11-060 Content of Environmental Review states that agencies shall "carefully consider the range of probable impacts, including short-term and long-term effects." Impacts shall include "those that are likely to arise or exist over the lifetime of a proposal", or, in some cases, even longer. WAC 197-11-330 Threshold Determination Process requires the responsible official to take into account the following when determining whether a proposal has significant adverse impacts: "The same proposal may have a significant adverse impact in one location but not in another location;" "The absolute quantitative effects of a proposal are also important, and may result in a significant adverse impact regardless of the nature of the existing environment"; and, "Several marginal impacts when considered together may result in a significant adverse impact." In reaching such a decision, SEPA states that the responsible official shall not balance whether . the beneficial aspects of a proposal outweigh its adverse impacts, but rather, shall consider whether a proposal has any probable significant adverse environmental impacts under the rules stated above. WAC 197-11-448 Relationship of EIS to other considerations states that the general welfare, social, economic, and other requirements and essential considerations of state policy will be taken into account in weighing and ' balancing alternatives and in making final decisions. . . . The EIS provides a basis upon which the responsible agency and officials can make the balancing judgment mandated by SEPA, because it provides information on the environmental costs and impacts. WAC 197-11-660 Substantive Authority and Mitigation requires that mitigation measures be based on policies, plans, rules or regulations formally designated by the agency.. It also requires that mitigation measures shall be related to specific adverse environmental impacts clearly identified in an environmental document on the proposal: "After its decisions, each agency shall make available to the public a document that states the decisions. The document shall state the mitigation measures, if any, that will be implemented as part of the decisions, including any monitoring of environmental impacts." (WAC 197-11-660(1)(b)) This document is intended to meet this requirement. As well as analyzing the environmental impacts, the City of Renton, under its land use provisions, must assess its many objectives and goals and decide how this project furthers or conflicts with them. Some City goals may be internally conflicting. When this occurs, the City believes that the SEPA process mandates a close environmental analysis to determine priorities. If the priorities are established and the project is able to mitigate its impacts sufficiently, then the City believes it should proceed. This document presents mitigation measures necessary for the ultimate construction of The Forrest Creste development. THE PROPOSED ACTION Raymond LaBlanc is proposing to develop an 11.93 acre site in East Renton as a multi-family residential project consisting of 24 townhouse condominium units and 176 apartment units. The anticipated residential population living in . Forrest Creste, with the proposed 200 units, is 360 persons. The site is located to the north and generally west of the intersection of Duvall Avenue NE and NE 4th Street, and it is currently covered with second growth vegetation;there are .64 acres of wetland (.61 acres of Class II and .03 acres of Class III) on the site. The property is vacant except for two . _ outbuildings. The outbuildings and much of the vegetation will be removed for the proposed development. To the west FORREST CRESTE MITIGATION DOCUMENT -1- SEPTEMBER 22,1992 • and south of the site are the Orchards Development and the Windsor Place apartment complex; single-family developments abut the site to the north and the east of the site. Honeydew Elementary School and playground are •located to the northwest of the site. The project will include a recreation center (with improvements such as lounges, active recreation areas, meeting rooms, kitchen facilities), a pool, and a sports court centrally located on the site; children's playgrounds are dispersed around the; site. A trail system will be installed throughout the site, providing an area from which to observe the wetlands, as well as a system for bringing pedestrians to recreational facilities and to neighboring residential units in the Forrest Creste complex. i Infrastructure improvements will include improvements to Duvall Avenue (turn lanes, sidewalks, street lighting), the addition of internal driveways/circulation routes, and parking areas), and water, fire, and sewer systems. Additionally, the, applicant will bei called upon to support the construction of NE 6th Street, as/if required by City Council following discrete City evaluation of the requirements and location for this roadway. The project requires a rezone from G-1, General Use, to R-3 (Medium-Density Multi-Family Use), a designation which is generally compatible with the current Comprehensive Plan. The applicant is also seeking site plan approval for the, proposed multi-family residential complex. Development on this site would be ensured to be in general compliance with the City's existing plans and programs by the establishment of environmental mitigation measures in this Mitigation Document and/or with conditions applied at the time of site plan review. Following is a discussion of environmental elements/impact areas, as identified in the Environmental Impact Statement, together with a presentation of mitigation measures designed to address potential adverse impacts: . A. NATURAL ENVIRONMENT 1. 'Earth Impacts: The site is on a portion of the upland between May Creek and the Cedar River. Surface soils on the site are classified as gravely and sandy; underlying soils are composed of Vashon till (loosely sorted, highly condensed material deposited on the site about 15,000 years ago). The site slopes approximately 10%, from a height of 455 feet in the northeast corner to a low of 395 feet in the southwest corner. Seismic hazard is low on this site. Grading activities necessary to prepare the site for development would result in some changes to topography to create nearly level surfaces. These activities would result in an increased potential for erosion and sediments created could reach buildings and on-site wetlands. Site soils are also moisture sensitive; moisture collection could result in saturation and or erosion. Mitigation measures established for construction activities are considered to be sufficient to limit erosion during development. Limited impervious surfaces (approximately 40% of the site), appropriate storm water management improvements (described in Section A.4 below), and plans for retained/introduced landscaping (described in Section A.5. below) would be sufficient to control erosion following development of the site. RECOMMENDED MITIGATION MEASURES: A.1.a) The applicant shall, in order to reduce the potential for adverse environmental impacts to the underlying terrain from preparation and operation of the site, shall provide a grading and filling plan prepared by a geotechnical engineer. This plan shall be approved by Planning/Building/Public Works prior to the issuance of site preparation permits for any element of the proposed action and shall be consistent with the approved Site Plan. All elements of the Grading and Filling Plan are to remain in force and effect during all site preparation and construction activities. FORREST CRESTE MITIGATION DOCUMENT -2- SEPTEMBER 22,1992 A.1.b) The applicant shall, in order to reduce the potential for impacts to the underlying terrain from temporary construction activity, prepare a Construction Mitigation Plan. This Plan shall include the following elements: 1) a temporary erosion control element (e.g., sediment ponds; sediment traps); 2) a temporary drainage element to address seepage; 3) a provision for wheel-washing vehicles prior to leaving the site; 4) a provision for periodic watering of the site to minimize dust generation; 5) a provision for a geotechnical engineer to inspect the site on a weekly basis to ensure that all approved site preparation plan elements are in full force and effect; the geotechnical engineer shall submit written reports monthly to confirm that site plan preparation is proceeding according to plan; additional written reports shall be submitted in the event of an emergency or in the event that approved plans require modification; 6) a provision to reduce and recycle construction materials and debris, to the greatest extent feasible to limit dust/debris impacts during the construction process; 7) a written agreement by the applicant acknowledging its obligation to pay to the City a total of up to $2,000 within 30 days of receipt of invoices from the City for street-cleaning costs in the event that the applicant does not complete required street-cleaning activities; 8) written acknowledgment by the applicant of its responsibility for repair of damage to the • public right-of-way, when such damage is defined by the City as having been caused by construction vehicles serving the project, and with repairs to be provided by the applicant in a manner which is consistent with City standards; 9) an educational program for equipment operators which emphasizes procedures and techniques for limiting the impacts to the stability of site terrain and reducing dust emissions associated with the operation of construction equipment. The Construction Mitigation Plan is to be approved by the Development Services Division in advance of issuance of a site preparation/building permit for any element of the proposed action. All elements of the Construction Mitigation Plan are to remain in force and effect during all site preparation and construction activities. The acknowledgment for repair of damage to the public right-of-way is to be approved by the Development Services Division and the City Attorney in advance of the issuance of a permit for any element of the proposed action. 10) Vegetation Management/Remediation Plan. This Plan shall include the following elements: (i) A component which clearly delineates tree clearing limits and protected wetland buffer areas to minimize disruption to vegetation. (ii) An agreement which confirms the applicant's intent to begin building within 30 days following site preparation, and/or to hydroseed the site within thirty days of completion of grading activities (and in no instance later than October 1st) in the event that development of the site is delayed beyond that period of time. (iii) A surety device equivalent to ten percent (10%) of the value of the plantings to ensure the reintroduction of native vegetation to the site (of a level and type FORREST CRESTE MITIGATION DOCUMENT -3- SEPTEMBER 22,1992 • commensurate with the current vegetation), within one year of the completion of - grading, in the event that construction of the development' is not substantially underway at that time. The Vegetation Remediation Plan is to be approved by the Development Services Division in advance of issuance of a permit for any element of the proposed action. All . elements of the Vegetation Remediation Plan are to remain in force and effect during all site preparation and construction activities. Note to Applicant #1: The applicant will also be required to comply with the Surface and Storm Water Drainage Ordinance, which establishes development parameters for site preparation and construction, including, but not limited to the confinement of site preparation to periods of relatively dry weather, the. establishment of suitable erosion control methods, and requirements for containing exposed soil. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; Mining, Excavating, and Grading Ordinance, 4-10; Comprehensive Plan I.B; Surface and Storm Water Management Ordinance 4- 22; Land Clearing and Tree Cutting Ordinance 4-9. ADVISOR?'NOTE: Impacts to the terrain from operation of the proposed development and mitigation measures to address those impacts are presented below—see "Ground Water",."Surface Water", "Storm, Water Management", "Wetlands" and "Habitat"). 2. it Impacts: The EIS considered the impacts of and possible mitigation measures for air pollution caused by particulates, carbon monoxide, and construction activities. Particulates: For this project, particulate levels were obtained from monitoring stations in the Duwamish Valley (12026 42nd Avenue South) and in Kent, at James Street and Second Avenue. Information was, also obtained for particulate levels that were monitored at the SE. District Health Center at 12015 NE 4th l Street, approximately one mile west of the project site. Samples taken between 1985 and the present' )indicated that the background air quality is well within the national primary standard and the national) secondary standard. Because the project site is in an area of lower traffic congestion than is the monitoring site, it can bell anticipated that air quality is even better at the project site than at the monitoring site. Data from PSAPCA monitoring activities indicates that emissions from wood stoves and fireplaces in the residential portions of the,project would likely degrade the air quality in the area. Over the past several' years, there has been an increasing number of "burn bans" employed for solid fuel burning devices in' }order to protect air quality. Use of gas fireplaces, however,would be acceptable. ;Carbon Monoxide: The increased traffic (approximately 1200 trip ends per day) generated by development of the site will increase the ambient carbon monoxide levels in the area. No monitoring has been done to confirm actual carbon monoxide levels at the project site. The site is outside a designated carbon monoxide non-attainment area and is within an "unclassifiable area." This means that modeling' would likely indicate that occasional violations of the standard would occur. Construction Activities: Overall, construction activities could adversely impact air quality through the generation of dust from) land clearing and grading operations, as well as from the movement ofl 'construction vehicles on the site. These impacts will be only temporary in nature however, and are not 'expected to have a long-term significant impact on ambient air quality. Since the site is in the City of IRenton's "no bum" zone, no particulate emissions will be generated blithe burning of land clearing! ,debris. I I - I FORREST CRESTE MITIGATION DOCUMENT -4- SEPTEMBER.22,19921 RECOMMENDED MITIGATION MEASURES: A.2.a) The applicant shall, in order to address air quality impacts from the operation of the residential • complex, install gas fireplaces, in the event that fireplaces are to be provided. Plans for these heating units shall be approved by the Development Services Division prior to issuance of building permits. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance 4-6; UFC ADVISORY NOTE: Also see Recommendations A.1 (Earth) to address air quality impacts from construction activities. See Recommendations B.2 to address transportation-related air quality impacts for the operation of the complex. 3. Water a) Ground Water Impacts: The project site is located entirely with the City's Aquifer Protection Area, Zone II. Portions of the site (particularly in the western and northwestern portions of the property) host a moderate amount of perched ground water -- that is ground water which rests on or just below the surface soils, where they are underlain by Vashon till soil (see "Earth"). Ground water recharge occurs naturally on the largely permeable surfaces. Where subsurface water is perched, construction of subsurface improvements could be complex, but is feasible. Additionally, with the project, there will be some loss of recharge due to the increased amount of impervious surface (about 41% of the site would likely be converted to constructed surfaces with the proposed development). Long-term slow surface water flow rates will be changed to rapid • short-term flow rates with some accompanying loss of recharge. The contaminants entering the ground water from the project are expected to be of the type generally found in residential areas and to pose no significant threat to the aquifer. To mitigate construction-related impacts construction mitigation plans will need to be developed to minimize disruption to the site,to employ erosion control and drainage control facilities, and to revegetate the site. To mitigate the impact of the increased amount of impervious surface and of the increased flow rates, the project will need to be designed to include a maximum amount of native vegetation, and to contain a series of biofiltration swales and detention areas. These are intended to slow down the rate of water flow, to improve water quality, and to provide for infiltration, thereby partially offsetting the loss of ground water recharge. Forrest Creste would be subject to the provisions of the Aquifer Protection Area Ordinance. To reduce adverse impacts on the aquifer, the project does not propose any uses which involve the large scale storage of regulated compounds prohibited in APA Zone II. Additionally, the project will provide sewer service for all uses on the site. RECOMMENDED MITIGATION MEASURES: A.3.a) The applicant shall, in order to ensure the protection of water quality in the City's aquifer, provide each tenant with information concerning the presence of the underlying Aquifer Protection Area, with a copy of the City's public information brochures concerning the Aquifer Protection Area Ordinance, and with notice of the requirement for compliance with that Ordinance. A.3.b) The applicant shall provide a central vehicle wash/service area, with containment facilities, to prevent used water and contaminants from entering the surface water, ground water or wetland areas. Policy Nexus: Aquifer Protection Area Ordinance FORREST CRESTE MITIGATION DOCUMENT -5- SEPTEMBER 22,1992 ADVISORY NOTE: Also see Recommendations A.1 (Earth) and A.4 (Wetlands) to address ground water quality impacts from construction activities. Adequate mitigation of potential • i. ground water impacts, including the restriction on the storage or production of regulated compounds, will be also be achieved through required compliance with the City of Renton Aquifer Protection Area Ordinance. No other r mitigation measures are considered necessary to address ground water impacts. b) Surface and Storm Water Impacts: The site is located within the upland portion of the Maplewood Creek drainage basin. Hydrology studies indicate that little runoff currently occurs at the site. However, during heavy storms, drainage from approximately ninety percent (southernmost 9.3 acres) of the site travels into a low area on the southwest corner of the site and then into a ditch along the east side of Duvall Avenue NE. Drainage from approximately 1.2 acres on the southwest corner of the site travels off of the subject property to the south. The northwest portion of the property (approximately 1.4 acres) drains into the Duvall Avenue NE ditch at the north end of the property. Drainage then moves through the ditch in a southerly direction. There are approximately 24.7 acres of neighboring property to the north and east of the site which contribute drainage flows which cross the subject property. Approximately 19 acres of that nearby property is developed with residential uses; the remainder is vacant, forested area. There is an intermittent stream in the vicinity of the northeast corner of the site. A drainage channel which runs through the center of the Forrest Creste site conducts runoff from approximately 10 of the 24.7 acres identified. Runoff from the site and tributary areas runs along the above-described ditch on the east side of Duvall Avenue to a point approximately 600 feet south of the site, where the channel crosses: Duvall Avenue NE through a culvert and travels west for about 1200 feet through heavily! / vegetated land at a relatively flat slope. The channel also receives inflows from the area west of! Duvall Avenue NE to the north.. It then travels south, crosses NE 4th Street and joins with Maplewood Creek approximately 2,500 feet downstream from the site. The creek then flows south through a steep ravine, crosses the Maplewood Golf Course and enters the Cedar River. At the current time, there is occasional flooding near the culvert crossing (Duvall Avenue/north of, NE 4th Street) and east of the Duvall Avenue/NE 4th Street intersection. Localized flooding has; also been identified in the areas of the ravine and the golf course. There has also been some; flooding and scouring from erosion noted at the Windsor Place Culvert that flows under,' Bremerton Avenue NE on the shared boundary between the recently approved Orchards and, Windsor Place apartments. The existing drainage patterns will be modified on the site during periods of construction activity; (e.g., reconfiguration of soil slope) and during operations (based upon the increased volumes' and changed routes, occurring from the greater amount of impervious surface in the completed! project). However, as a result of required Construction Mitigation Plans, and development-' related improvements required to the site under the City's Surface and d Storm Water Drainage; Ordinance (modeled on the King County Surface/Storm Water Management Ordinance; [KCSWM]), the character and quality of storm water runoff will likely be improved above what it is now on the site in its natural state. With the proposed development, the peak runoff rate from; the developed site will be required to be no greater than pre-development peak run-off rate. Specifically, in establishing a storm water management system for this site, the applicant will be, called upon to provide a Level 2/Level 3 storm drainage analysis and a solution, consistent with, the KCSWM. This solution would entail provision of a wet pond and detention pond (approximately 100' x 190' x 5), control structures, oil/water separators and a series of biofiltering drainage swales, to be coordinated with wetlands, so that these sensitive areas are not endangered. It would also be desirable to employ the existing natural drainage channel and to have an infiltration system, if.feasible to do so, and if the underlying aquifer could be protected FORREST CRESTS MITIGATION DOCUMENT -6- SEPTEMBER 22,1992 with such a system. The necessary studies will be provided and conceptual plans developed and • approved by the City in conjunction with site plan review (as required by the City's Surface and Storm Water Management Ordinance). • Additionally, the City's Utility Systems Division has determined, through the Maplewood Creek Drainage Basin Study, that increasing the capacity of the Duvall Avenue culvert would eliminate most flooding problems. The City's proposed Capital Improvement Program includes a plan to improve the culvert; if funding for that improvement is based upon "fair share contributions" on the part of beneficiaries, then it is likely that Forrest Creste would be included in the district assessment. The tributary area to the site also hosts some septic tank systems which are failing, which could lead to contamination of this site through runoff. King County Health Department and the City of Renton would work together to address such a circumstance. RECOMMENDED MITIGATION MEASURES: A.3.c) No specific mitigation measures for surface/storm water management are required in conjunction with the Environmental Mitigation Document as mitigation of on-site adverse will be achieved through compliance with the City Surface and Storm Water Management Ordinance (4-22). Note to Applicant #2: Under the Surface and Storm Water Management Ordinance, , improvements will be required to address on-site surface/storm water impacts and off- site adverse surface/storm water impacts (both in the local areas of the drainage basin and in the downstream section of the basin) Required storm water management analyses and improvement systems (e.g., detention . ponds, control structures; swales) will be conducted and improvements planned/installed in keeping with the requirements of the King County Surface Water Design Manual (KCSWM), as established in the City's Surface and Storm Water Management . Ordinance. By Ordinance mandate, conceptual storm water management plans must be approved in conjunction with site plan review. Also see Recommendations A.1 ("Earth"), A.4 ("Wetlands"). No other mitigation measures are considered to be necessary to address surface/storm water management impacts: Policy Nexus: Not applicable c) Wetlands Impacts: Two wetland areas have been identified on the Forrest Creste site. Wetland #1 is located next to Duvall Avenue NE on the southwestern corner of the property. Approximately .61 acres of this wetland area is located within the Forrest Creste property, however, the wetland extends beyond the site boundaries to the south (onto the site of The Orchards); its total size is approximately three acres. Within the boundaries of Forrest Creste, Wetland #1 is identified as a Palustrine Forested wetland based upon the United States Fish and Wildlife Service (USFWS) classification system. The Department of Ecology has designated Wetland #1 as a Class II wetland — that is, a wetland which is defined by soils, water quality and water quantity which support wildlife habitat and diverse vegetation communities. Similarly, the wetland would be identified as Class II or High Quality, under the City's Wetlands Management Ordinance. The on-site portion of this wetland is dominated by red alder, black cottonwood, Oregon ash and salmonberry. Creeping blackberry, sword fern and lady fern are abundant as well. This wetland receives water from runoff from the surrounding upland areas. Overflow from the roadside ditch adjacent to Duvall Avenue NE also appears to accumulate in the wetland. This wetland has moderately high value for flood control, water quality improvement, and ground water exchange. FORREST CRESTE MITIGATION DOCUMENT -7- SEPTEMBER 22,1992 Wildlife inventories conducted for this area indicate features which would provide habitat for, passerine birds and a variety of mammals, including mountain beaver, chipmunks and chickaree during the wet seasons. During this same time period coyote, raccoon, and skunk may hunt the area for salamanders and Pacific tree frogs. Because of the small size of the wetland and the; limited duration of the period of standing water, the wildlife habitat is not outstanding.' Additionally, no endangered or threatened species were identified. This wetland is planned to remain essentially undisturbed; a small amount of filling may be required at the south end of the wetland in order to support construction of NE 6th Street: Environmental impacts related to the development of the roadway (including affects upon wetlands) will be addressed under a separate study; the roadway study would include an examination of routes which bypass the wetland areas. The studies related to the expansion of NE 6th Street are outside of the purview of this project because the new roadway is not required, to allow development of Forrest Creste. In the event that NE 6th Street is developed, and in thej event that filling of Wetland #1 on Forrest Creste is required, it would be subject to conditions established in the environmental mitigation document for the roadway, and subject to the conditions listed below as well. Wetland #2 is located on the northwest corner of the property adjacent to Duvall Avenue. It is .03 acres in size. It is defined as a "palustrine shrub/scrub wetland" under the USFWS classification system and is defined as a Class III wetland by the Department of.Ecology. Dominating vegetation includes red dogwood, blackberry, red alder, buttercup and large leaf evens. Reed Canary Grass and bentgrass are abundant. A portion of this wetland has been; previously.filled. The wetland receives water from a roadside ditch on Duvall Avenue to the north of the site and from adjacent upslope properties to the east. It has a moderate to low value for flood control and it offers no significant water quality improvement or ground water exchange;, there is no substantial habitat area here. It would be a Class III (or limited quality) wetland under, the City's Wetlands Management Ordinance. Based upon the .61 acre size and the classification as a high quality wetland under City, standards (Wetlands Management Ordinance No. 4346), and under Department of Ecology and USFWS, as described above, the applicant is required to provide improvements in a manner consistent with local Ordinance requirements. Applicable regulations would include the Wetlands Ordinance, the Landscaping Ordinance and the Surface and Storm Water Management Ordinance. These documents establish standards for set backs (50 feet for Wetland #1 which is defined as a Category II or high quality wetland), for plantings, and for, drainage controls. In order to achieve compliance with these regulations, the final Wetlands Management Plan would be required to accomplish the following objectives: • To minimize disturbances to existing wetlands that serve a valuable biological or habitat function; - • To protect wetlands from adjacent uses when such uses could threaten the biological or habitat value of the wetland; • To ensure that there is no net loss of wetland acreage on the site; • To replace, restore or enhance the disturbed portions of existing wetlands; • To improve the quality of surface waters entering wetlands; - • To improve the quality of surface waters entering the ground water system; • To ensure the long-term viability of the post-development wetland area; The proposed development includes a conceptual plan for improvements for Wetland #1 which can be specifically designed to achieve compliance with the City's Wetlands Ordinance, the, FORREST CRESTE MITIGATION DOCUMENT -8- SEPTEMBER 22,19921 Surface and Storm Water Drainage Ordinance, and related applicable rules and policies; the . proposed action includes the establishment of set back areas, develop and implement planting plans, install pedestrian trails, develop partial drainage swales, construct a drainage control structure. Wetland #2, because of its small size (.3 acres) and its limited quality, is exempt from the provisions of the Wetlands Management Ordinance, generally; however,wetland itself will not be disturbed and buffers will be provided. Further, all improvements provided on the periphery of this wet area (e.g., plantings, pedestrian access points, drainage features) will be required to be complement the vyetland ecosystem. For reference, an exhibit showing the location and size of each wetland is attached. RECOMMENDED MITIGATION MEASURES: A.4.a) No specific mitigation measures for wetlands protection/management are required in conjunction with the Environmental Mitigation Document as mitigation of on-site adverse impacts will be achieved through compliance with the City's Wetlands Management Ordinance (No. 4346). Note to Applicant #3: The Wetlands Management Ordinance requires the applicant to • submit a specific Wetland Mitigation Plan for wetlands, wetland buffers, and drainage swales indicating construction details (including schedule), vegetation plans (except for unchanged wetlands), hydrologic regime, boundary and buffers (as appropriate) for each wetland, wetland buffer, and drainage swale. The Ordinance, similarly, requires the applicant to develop and implement a five year monitoring plan (e.g., sampling, reporting) and a surety device commensurate with the value of the plantings to ensure replacement of materials as necessary. The Wetland Mitigation Plan shall be approved by the Planning Section of the Development Services Division prior to the issuance of any site preparation/building permit. A.4.b) The applicant shall, in order to enhance the value of the wetland as a natural habitat and as an educational amenity, provide adjacent to Wetland #1, a pedestrian trail and observation areas (with interpretive signing concerning the purpose and function of the wetland/native growth protection areas at appropriate locations). The plan shall be approved by the Development Services Division in conjunction with site plan review. A.4.c) The applicant shall, in order to limit potential impacts on water quality and wildlife habitat, not excavate the existing wetland to create an open water component. Note to Applicant#4: In the event that filling of any portion of Wetland#1 is determined to be necessary to accommodate future construction of NE 6th Street, the applicant must develop a Fill Plan which is consistent with requirements established under the Wetlands Management Ordinance. The amount of filled and newly-created, enhanced or restored wetland area shall be determined during the site plan ' approval process if the independent studies for NE 6th Street have been completed; if these studies have not been completed, future supplemental review of wetland fill plans may be required. If necessary to prevent the filling of wetland areas merely to create a buffer between the wetland and the new road alignments, adjustments (averaging) of buffers may be approved by the Planning Section of the Development Services Division next to the road alignments for NE 6th Street. In the event that the alignment selected for NE 6th Street, in the environmental review for that project, does impact the Forrest Creste site, then it is likely that the applicant will be required to comply, as well, with the conditions mandated in the NE 6th Street study. FORREST CRESTE MITIGATION DOCUMENT -9- SEPTEMBER 22,1992 Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; King County Surface Water Design Manual; Comprehensive Plan I.B), I.C., I.D., I.E., I,F., I.G., I.H., III.D., III.E., and • VIII.C.; Wetlands Ordinance. 5. , Natural Habitat Impacts: The site is essentially vacant and heavily vegetated. Native upland vegetation includes trees (middle-aged fir, cedar, maple, vine maple, and alder), large shrubs (vine maple, Oregon grape, huckleberry, etc.) and a variety of species of undergrowth plants-- such as trillium, wild geranium, ferns, mosses and typical wildflowers. Wetland vegetation, described above, includes alder, maple, fir, salal, Oregon grape, ferns, and berries; functionally, the wetlands serve as detention ponds for surface water] runoff in the wet seasons of the year. 1 The wildlife community varies widely but contains species generally found in and adjacent to highly urbanized areas lacking unique habitat features. Animal species on the site are primarily migratory These would include chickaree, chipmunks, coyote, raccoon, rabbit and skunk; amphibian populations may be found in the area during the wet seasons. Evidence also indicates the possible intermittent • temporary use of the site by mountain beaver and deer. Because of the planned removal of most of the existing vegetation, the size and composition of the wildlife community will be changed. Most existing animal communities will avoid migrating to this site, and will move to the remaining habitat areas nearbyl Urban-tolerant animals will remain on the site in landscaped areas and where tree cover is maintained or replaced. Conversion of the contiguous forested areas into fragmented tree groves within residential areas will favor edge species of birds. Based on a preliminary tree survey of the property and on the proposed site plan, a substantial number of the numerous evergreen and deciduous trees of greater than 8-inch diameter could likely be retained; similarly, a sizable number of smaller trees would be retained or introduced onto the site. Additional native vegetation could be retained on the site; new plantings could be based upon a native vegetation palate. Screening around site boundaries could be designed to facilitate "pass through" by mammals and birds, while providing privacy and defensible space for Forrest Creste residents and their neighbors. , RECOMMENDED MITIGATION MEASURES: A.5.a) The applicant shall, in order to limit the impacts of the development on the wildlife community, work with the Department of Wildlife, to develop a plan for wildlife management (e.g., relocation where appropriate) during the period of transition of the site from the natural to the built environment. A.5.b) The applicant shall, in order to limit the impacts of the development on the existing habitat, prepare a Landscape Plan which retains significant trees on the site and which provides for a variety of landscaping elements. The Plan shall be accompanied by: 1) An amended tree survey of the property indicating the evergreen and deciduous trees Of greater than 8-inch diameter at breast height; - 2) A tree preservation plan which retains the maximum feasible number of trees of eight inches or greater in diameter in areas to be retained as open space under the approved site plan. The plan should indicate each of those trees of eight inches or greater in diameter that are planned to be retained and those trees of eight inches or greater In diameter that are planned to be removed in these areas. 1 3) A plan and restrictive covenant describing proposed performance and replacement standards for new landscaping elements and retained trees, exclusive of those in wetlands and wetland buffers, which shall include provisions for: (i) Replacing all removed trees greater than 12 inches in diameter with three new two-inch caliper native species trees (primarily evergreen such as Douglas fir or FORREST CRES T E MITIGATION DOCUMENT -10- SEPTEMBER 22,1992 , Cedar) in preserved open space areas (defined as fifteen feet from the edge of . buildings and/or drives), and maintenance of those trees over the life of the project. (ii) Replacing all removed trees greater than eight(8) inches but less than 12 inches in diameter with two new 2-inch caliper native species trees(primarily evergreen such as Douglas fir or Cedar); and maintenance of those trees over the life of the project. (iii) Providing a landscaping plan which shall contain extensive landscaping around the perimeter of the project area and at other appropriate locations. Specifically, landscape elements within the site shall be planned to consist of native vegetation elements (with an emphasis on species which provide habitat and/or food sources),to establish a consistent overall character for the proposed project or for distinct portions of the project. Landscape elements shall also be of sufficient density, height, and variety to provide year-round screening between the site and neighboring residential uses and public rights-of-way. Note to Applicant #5: The Landscape Plan, tree survey, and proposed performance and replacement standards shall be submitted to the Planning Section of the Development Services Division for review and approval prior to the issuance of building permits for the development of the approved site plan. Note to Applicant #6: At the time of site plan review, staff will likely recommend that the applicant be called upon to provide: a) a landscaping maintenance agreement, to be valid for the life of the project, which describes pruning systems, fertilization systems, and pest control systems; and b) a landscaping • surety device (equivalent to ten percent of the value of the plantings) to be valid for the life of the project to guarantee that any new landscaping element that dies during the first three years after installation will be replaced. A Homeowners'Association will likely be established to implement these requirements. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; Comprehensive Plan I.C., I.D., III.C., and III.D; Landscaping Ordinance 4-31-34; Land Clearing and Tree Cutting Ordinance 4-9. B. BUILT ENVIRONMENT 1. Land Use/Housing Impacts: The project requires rezones, site plan approvals, and demolition, filling, grading, and building permits. The existing zoning is G-1, General Use, which would allow uses such as residential development, agricultural activities, raising of livestock and a variety of public recreation facilities (e.g., golf course). The proposed project includes an application to designate the entire site for R-3 use; the R- 3 zone (Medium-Density Multi-Family) would permit a maximum of 25 multi-family residential units per acre. The current Comprehensive Plan designates approximately the southern two-thirds of the site — 8 acres -- for medium-density multi-family use, which would allow a maximum of 25 units per acre. The remaining northern one-third (4 acres) of the site is designated for low-density multi-family development which would allow a maximum density of 12 units per acre. The proposed density level, at 17 units per acre, would then be generally permitted with both the underlying low-density and medium-density residential use designations. Development of this site with residential units would be in keeping with the King County Growth Management Policies (e.g., designation of the site as an urban growth area, provision of diversity in housing types). With up to 200 townhouse and traditional apartments, Forrest Creste would provide needed multi-family housing opportunities. No significant environmental impacts with respect to land use or housing impacts are identified. FORREST CRESTE MITIGATION DOCUMENT -11- SEPTEMBER 22,1992 RECOMMENDED MITIGATION MEASURES: • B.1.a) No mitigation measures are required with this Mitigation Document. Note to Applicant #7: In order to ensure continuing compliance with City policies and programs, staff may recommend in favor of a contract rezone, which establishes development densities and performance standards, at the time of the Hearing Examiner's review of the rezone.application. Note to Applicant#8: At the time of site plan review, staff may recommend that the applicant be called upon to provide a modification to the design and siting of structures, landscaping, and other services/amenities, pursuant to review under the Site Plan Review Ordinance. 2. Transportation • The proposed project is located in a residential area which is in transition from rural and suburban to more urban level densities. Future development is anticipated to occur at a density commensurate with the urban designation assigned to this area by King County and the City. Providing adequate roadway systems is necessary to support local users and through commuters. Local roadways in the vicinity of and serving the site are NE 4th Street, NE 3rd Street and NE Sunset Boulevard which serve as major east-west arterial streets. Duvall Avenue NE, Union Avenue NE, and Monroe Avenue serve as the north-south arterial routes. Studies of the project area were conducted sing Policy Guidelines for Traffic Impact Analysis of New Development. These studies indicate that Current average daily traffic (ADT) for the major roadways in the study area includes 30,000 ADT for NE 4th Street and 34,000 ADT for NE 3rd Street. NE Sunset Boulevard is the third most traveled road, with traffic volumes of 22,400 ADT. Duvall Avenue NE, adjacent to the proposed Forrest Creste complex, currently carries 7,000 vehicles. The majority of these trips will originate and end outside of the City of Renton. The traffic study conducted for the EIS estimates that the project will generate 1235 daily trips and 137 afternoon peak-hour trips. When these trips are added to the predicted 1993 traffic volumes at the five area intersections analyzed, all intersections would continue to operate at Level of Service (LOS) D or better, except that LOS E could occur at the NE 4th Street/Union Avenue NE intersection at the afternoon peak hour (based upon anticipated levels of development at sites which would be anticipated to result in additional trips along this travel corridor). Based on City standards, LOS D or better is considered acceptable, so the project would generally not cause traffic operations to fall below City standards at intersections in the area. At the NE 4th Street/Union Avenue intersection, in the event that the anticipated LOS E occurs, it will be addressed by improvements slated to be installed by the City under the East Renton (NE 3rd/4th Street) Transportation Benefit District; improvements would be funded by contributions from developments within the District boundaries or within the"sphere of influence" as described below. Specifically, staff note that while Forrest Creste is outside of the Benefit District, the City will call for the! • applicant to participate in the District to a fair share, based upon study findings which indicate that the ,project is in the "sphere of influence" affected by the District, and findings which indicate that there will be impacts from the project on District roadways. For example, in conjunction with the Benefit District,1 the applicant may be called upon to participate in improvements (such as improvements to signalization and/or monitoring of traffic volumes/patterns) to NE 3rd/4th Street at intersections with Duvall Avenue,i Monroe Avenue, Jefferson Avenue, and Union Avenue should result in protection/creation of satisfactory service levels. Additionally, the applicant must make improvements, to City standards, to all surrounding residential streets and neighborhood collector streets where impacts occur which are directly attributable to the! project For example, the applicant would be called upon to provide an additional eight feet of right-of- way on Duvall Avenue NE and to install a left turn lane parallel to the project site; lane paving, curbs, gutters, sidewalks, and street lighting would be required along that corridor as well. These construction; requirements will result in roadways of adequate size and with appropriate improvements (e.g., travel, • lanes, turn lanes, signals/signs, curbs, sidewalks, street lighting), to allow safe, efficient movement ofl, FORREST•CRESTE MITIGATION DOCUMENT -12- SEPTEMBER 22,1992 anticipated vehicular and pedestrian traffic. At the time of site plan review, staff may call upon the • applicant to extend street improvements (curbs, sidewalks, gutters) along Duvall Avenue from the north property line of the site to the intersection with SE 121st Street; this extension would provide a logical boundary which would facilitate safer pedestrian travel along this corridor. Further, the applicant will be called upon to participate in the future construction of the NE 6th Street extension, in accord with City requirements; this road would be constructed when sufficient fees are available from both Forrest Creste and the Orchards to install improvements. Future studies conducted under the direction of the City will determine the design, siting and construction of that roadway. With respect to on-site vehicle circulation impacts, the applicant is proposing to provide primary access from Duvall Avenue at this time, with a second access provided from NE 6th Street, when funding is available to do so. A gated emergency access will be provided on the northeast corner of the site (140th Avenue NE). The project-generated traffic is projected to use Duvall Avenue NE (either via direct access and/or via access from the likely extension of NE 6th Street), leading to Sunset Boulevard or to NE 4th Street. The applicant must construct internal roadways and related on-site improvements curbs, gutters, sidewalks, general directional signs, and fire lanes) to comply with City codes (e.g., Subdivision Ordinance 9-12-8; Streets and Arterials Plans); at the time of site plan review, it is likely that the City will call for a gated bridge over the detention pond to ensure the availability of contiguous roadway for emergency vehicles. The applicant has proposed to provide 1.75 designated parking spaces per unit, in accord with requirements established in the Parking and Loading Ordinance (4-14). Additionally staff will call for the provision of adequate space for tandem parking adjacent to garage's, in a manner which does not intrude into commuter or emergency vehicle travel lanes. In order to further ensure the continuing availability of travel lanes for resident's vehicles and emergency service vehicles, the applicant will be required to. provide a vigorous management system for enforcement of parking restrictions and a surety bond in the amount of$50,000.00 to reimburse the City for costs incurred in enforcement of City regulations. With these mitigation measures, the project would provide for efficient on-site travel and would not cause any adverse impacts on the parking supply in the surrounding area. (In the event that the number of units is reduced, parking spaces would likely be removed from the east side of the property to provide opportunity for a.greater planted buffer between the site and-property to the east.) Pedestrian pathways planned for this project will be designed to provide access to nearby developments, to public roadways, and to transit stops. Transit service is provided to the project area by Metro routes#111 and #147 on NE..4th Street. These routes provide service to downtown Renton, South Bellevue, and downtown Seattle. According to Metro, a proposed service change for 1992 has been proposed for route 240 to, serve Coal Creek Parkway, Duvall-Avenue NE, and NE 4th Street. This route would operate seven days a.week and provide direct. service to downtown Bellevue, and offer connections at the South Renton Park and Ride with Metro service to downtown Seattle and South King County destinations. This route would become the main transit service for the proposed project. Provisions for a METRO bus stop will be recommended. Truck traffic in the area would likely increase during the periods of construction activity. Because this traffic will operate prior to the installation of any traffic improvements adjacent to the project site, it could increase the risk of accidents on Duvall Avenue NE and Union Avenue NE. Truck traffic after completion of the project will be minimal, as,it will consist only of delivery vehicles and occasional moving vans. To mitigate the increased demand placed on transportation facilities by the uses in the proposed project, a variety of transportation mitigation measures are being recommended. They can be grouped into the following categories: • a) Participation on a "fair share" basis in the NE 3rd/NE 4th Street Traffic Benefit Zone in order to • provide support for improvements to the local roadway network (e.g., Duvall Avenue NE., NE 6th Street construction; signalization improvements at intersections along the NE 3rd Street corridor); these actions would supplement those improvements required by City Code (e.g., - Renton Subdivision Ordinance) for the proposed development; FORREST CRESTE MITIGATION DOCUMENT -13- SEPTEMBER 22,1992 Ib) Physical improvements to mitigate the dependence on single occupancy vehicles by encouraging the use of the proposed new transit service on Duvall'Avenue NE; , I _ c) A Transportation Management Plan (TMP) designed to decrease the dependence of residents on% single occupancy vehicles; d) Facilities to encourage the use of bicycles for commuting thereby mitigating the impacts associated with dependence on automobiles. Additionally, mitigation measures are proposed to reduce the impacts of construction traffic on adjacent, streets and residential areas. A i ,RECOMMENDED MITIGATION MEASURES: . I B.2.a) The applicant shall, in order to reduce project-generated traffic impacts on the NE 3rd/NE 4th Street corridor, either: i) provide direct improvements to the NE 3rd/NE 4th Street corridor, pursuant to direction by the City's Transportation Services Division; or ii) contribute a "fair share" traffic mitigation fee for the NE 3rd/NE 4th Transportation Benefit District of$124.00 per average weekday trip. The direct improvement plan or the Traffic Mitigation Fee is to be established at the time of application for a Building Permit for any element of the proposed project. The direct improvement plan or the fee option is to be based on the number of average weekday trips, attributable to the District from the project. If the applicant elects to construct direct improvements, they shall be installed prior to the issuance of the Certificate of Occupancy for; the project. If the applicant elects to pay a fee, that fee shall be paid prior to the issuance of the i Building Permit. (Note: The fee would be $153,000.00 for the proposed 200 unit complex, based upon the 1235 ADT level). Note to Applicant #9: If the applicant cancels the Building Permit in writing, then the, unencumbered portion of the fee plus accrued interest may be refunded to the applicant. B.2.b) The applicant shall, in order to reduce project-generated traffic impacts on Duvall Avenue NE deed up to eight feet of additional right of way, if necessary, on Duvall Avenue NE prior tol widening of the street to five (5) lanes. The applicant shall receive a credit toward the Traffic Mitigation Fee for the value of any street right-of-way which exceeds that required by City; ordinance(s). Note to Applicant#10: In addition to the above-described dedication, the applicant will be called upon-to construct roadway improvements on Duvall Avenue NE abutting the site (e.g., curbs,, gutters, sidewalks, street lighting) and install a left turn lane on Duvall Avenue adjacent to the project site as required by the Renton Subdivision Ordinance (9-12). At the time of site plan review, staff may also recommend extension of selected right-of-way improvements (curbs, gutters, sidewalks) along Duvall Avenue north to SE 121st Street in order, to protect pedestrian safety between the site and nearby commercial/institutional developments! which are likely to be utilized by Forrest Creste residents. 6.2.c) The _applicant shall, in order to provide necessary secondary ingress/egress to the site,! participate to a fair share in the construction of NE 6th Street as a full width neighborhood' collector street. • Participation will include, but may not be limited to dedication of a thirty (30)1 foot right-of-way, installation of paving, curbs, gutters, sidewalks and street lighting, installation of a vehicle turnaround (to standards established in the Renton Subdivision Ordinance). The, applicant shall receive a credit toward the Traffic Mitigation Fee for the value of any street right' of way which exceeds that required by City ordinance(s) OR the applicant shall be reimbursed' • through a Latecomers Agreement for the value of any street improvement(s) which exceed that, required by City ordinance(s). FORREST CRESTS MITIGATION DOCUMENT -14- SEPTEMBER 22,1992 B.2.d) The applicant shall, in order to reduce traffic impacts associated with the reliance upon single occupancy vehicles, provide direct pedestrian access routes from internal residential streets to Duvall Avenue NE to encourage the use of proposed new transit service on Duvall Avenue NE. Pedestrian routes to Duvall Avenue NE must have hard surfaces and adequate pedestrian-level lighting to provide safe use during low light hours. The pedestrian routes and lighting shall be approved by the Planning Section of the Development Services Division as part of the site plan approval process. B.2.e) The applicant shall, in order to reduce traffic impacts associated with the reliance upon single occupancy vehicles, prepare a Transportation Management Plan (TMP), prior to issuance of the Building Permit for any element of the project. The TMP must contain at least the following provisions: 1) A designated transportation coordinator to promote and coordinate the use of public transportation and high occupancy vehicles; (this person could be a manager or resident of Forrest Creste); 2) A free one-month bus pass made available to each new tenant at the time of occupancy (peak hour, two zones); 3) The distribution of site-appropriate transit and ride sharing information to new tenants and annually to all tenants; 4) Secure bicycle parking in, or reasonably close to, each multi-family structure; • 5) An annual transportation survey and monitoring report submitted by the transportation coordinator to the Transportation Services Division. B.2.f) The applicant shall, in order to ensure adequate emergency access to the site, provide: 1) a gated entry route via 140th Avenue NE, which is restricted to .use by emergency vehicles. Plans for this access (right-of-way, paving, etc.) shall be approved by the Development Services Division and the Fire Department during site plan review. This access route shall be available during construction and operation of the Forrest Creste development. 2) a reservation of right-of-way of sufficient width to accommodate City street standards for any future extension of 140th Avenue SE that traverses the subject property; provided that such reservation shall terminate six years after the issuance of the Certificate of Occupancy for the Forrest Creste development. B.2.g.) The applicant shall, in order to ensure adequate emergency vehicle access to the site, shall provide an emergency services management plan which includes a strong educational component and vigorous enforcement of parking restrictions to ensure that persons do not park illegally on this site in areas which are required for circulation and/or emergency vehicle access. This plan is to be accompanied by a provision for a renewable emergency services protection surety device, in the amount of$50,000.00, to be instituted following any calendar year in which ten (10) or more parking citations are issued for Forrest Creste. This device is to be valid for a minimum three (3) year period from the last reported violation; this plan and surety device are intended to assist in ensuring the preservation of the required right-of-way for resident's and emergency vehicles. 'The plan and the surety device are to be approved by, and the fee paid to the Development Services Division prior to the issuance of the Certificate of Occupancy. B.2.h) The applicant shall, in order to encourage increased use of public transit, contribute a fair share toward the provision of a concrete base and necessary easement for one transit shelter on FORREST CRESTE MITIGATION DOCUMENT -15- SEPTEMBER 22,1992 • � I Duvall Avenue NE. Location of the transit shelter base and easements shall be coordinated with The Orchards and other neighboring developments; it shall be approved by Metro, and the Development Services Division, as partof the site plan approval process. . I 1 B.2.i) The applicant shall, in order to address traffic safety impacts, work with the Renton School District to determine a fair share contribution for a school bus shelter on or adjacent to the project site. Plans for this school bus stop shall be approved by Development Services Division' in conjunction with site plan review for Forrest Creste. The school bus shelter shall be installed prior to the issuance of the Certificate of Occupancy. B.2.j) The applicant shall, in order to reduce local and regional traffic impacts (and related dust and noise impacts) caused by construction vehicles, provide the following plans/systems, to be approved by the Transportation Services Division prior to issuance of any site preparation/building permits: 1) temporary traffic control measures on Duvall Avenue NE. during periods of site preparation and construction; 2) specific planned off-site hauling routes; 3) an internal looped emergency access route to provide emergency services personal access to all areas of the site at any time during the preparation and construction of the, development; 4) an agreement to confine operation of construction vehicles on nearby residential streets, limit construction vehicle access to the site to Duvall Avenue NE; 5) an agreement to restrict hauling activities at the 1-405 and NE. 4th Street and at 1-405 and Sunset interchanges to the hours of 8:30 AM to 3:30 PM or submit a hauling route' plan for peak hours which avoids these interchanges; and 6) an agreement to restrict construction activity on the site to the hours of 7 AM to 8 PM, Monday through Saturday. No .construction activity shall be permitted on Sundays or holidays. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; Washington State Second , Substitute House Bill 1671 (SSHB 1671); City of Renton Six-Year Transportation Improvement Program; City of Renton Resolution 2769; Comprehensive Plan I.a), VII.a), VII.b), VII.C., and VII.H.; Northeast' Quadrant Plan. 3. Public Services I,' The EIS identified a number of potential impacts and possible mitigating measures for police and fire. Service, schools, and parks and recreational facilities. Ia) Police The project is located in District Nine of the Renton Police Department. This zone is developed primarily with residential uses. The response time for emergency calls averages just under three minutes and for non-emergency calls just under ten minutes. This level of service is provided by a force which averages 1.9 officers per 1,000 population. The residential project is anticipated to generate 88 annual calls for police service. No increase in the number of police officers is anticipated to maintain the current ratio of officers to population, to meet the increased demand placed by the 360 residents of Forrest Creste. FORREST CRESTE(MITIGATION DOCUMENT -16- SEPTEMBER 22,1992 In order to ensure that adequate resources are available to serve the residents of Forrest Creste, staff will recommend that Forrest Creste be required to provide a surety device to emergency fund service levels above those anticipated for this development. • Additionally staff have recommended the provision of congregate areas which would enable residents to become acquainted with one another and, thus, be more aware of intruders onto the site. Finally, at the time of site plan and building review, staff will make specific suggestions for improvements such as security devices, lighting, and alarm systems which are useful tools to reduce crimes against persons and property. RECOMMENDED MITIGATION MEASURES: B.3.a) The applicant shall, in order to reduce the potential impacts on the existing police force, voluntarily provide a renewable extraordinary police services surety device in an amount of $10,200.00, to be valid for a period of three (3) years, and to be approved by the Police Department and the City Attorney. The surety device is to be provided prior to issuance of a Certificate of Occupancy. The surety device will be drawn on in the amount of$75 for each multi-family residential police service call that exceeds twice the annual average number of calls per multi-family residential unit in the City of Renton times the number of units for which a Building Permit is being sought. If the surety device is drawn on in an amount less than $3,400.00 in the first year or less than $6,800.00 in the second year, the amount of the device for the subsequent year may be reduced accordingly. Note to Applicant #11:. If fewer than 200 units are constructed, the amount of the bond will be reduced accordingly. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6. b) Fire The project is located on the eastern edge of the Renton Fire Department's first response area. First response fire service would be provided to the project by Fire Station #12 (the Renton Highlands Station),which is located at NE 9th Street and Harrington Avenue NE. Currently, Fire Station #12 is staffed by five personnel and is equipped with one engine company and one aid car. The Fire Department estimates that the proposed project would generate approximately 20 , additional calls (e.g., fire, health emergency) per year based on the average number of calls for projects similar to the proposed 200 unit project. Response time to the project from this station would range from 5 1/2 to 6 minutes. According to the 1987 Fire Department Master Plan, an acceptable first response time is defined as having 5 firefighters on the scene in 5 minutes or less. Acceptable emergency aid response time is defined as having an aid car on the scene in 3 minutes or less. Mitigation measures would include provision of Code mandated on-site improvements such as emergency access routes (during construction and operation); hydrants, signage, illumination, alarm systems, and sprinklers. The provision of management plans and a surety device to ensure in the preservation of the required right-of-way for emergency vehicle travel will be required (see Transportation). The applicant will also be required to participate to a fair share contribution to the City's Fire Benefit District (Resolution #2931) toward the construction of new fire facilities in the City of Renton. The fee for this project would be $388.00 per unit. FORREST CRESTE MITIGATION DOCUMENT -17- SEPTEMBER 22,1992 RECOMMENDED MITIGATION MEASURES: B.3.b) No mitigation measures are considered to be necessary in conjunction with environmental review. Note to Applicant #12: The applicant will be required by City regulation to install on-site improvements to address fire prevention/suppression standards and will also be required to contribute to the Fire Benefit District(pursuant to Resolution#2931) at a rate of$388.00 per unit. (Also see "Transportation") Note to Applicant #13: If the applicant cancels the Building Permit in writing, then the unencumbered portion of the Fire Benefit District fee plus accrued interest may be refunded to the applicant. c) Schools ,i The proposed project is located within Renton School District No. 403. Students in the area attend Maplewood Heights Elementary School, McKnight Middle School, and Hazen High • School. Using the Renton School District's student-per-household multipliers, the project would result in 45 elementary school students, 11 junior high school students, and 10 high school students. In September of 1990, Maplewood Elementary School was 3 students below capacity, McKnight Middle School was 285 students below capacity, and Hazen High School was 434 students below capacity. Depending on the timing of occupancy of the various residential portions of the project and depending on future enrollment trends, the project could generate a demand for student spaces for elementary schools which exceeds the capacity of Maplewood Heights Elementary School. , ;. However, as there is a considerable amount of approved residential development underway in the immediate vicinity of the site and on nearby properties, it is likely that improvements required •- to serve Forrest Creste would be in place prior to the development of the project. The applicant will be encouraged to work with the School District to mitigate project-related impacts to local schools. RECOMMENDED MITIGATION MEASURES: • B.3.c) No mitigation measures are established in conjunction with environmental review. Note to the Applicant #14: The Renton School District (#403) currently has no Mitigation Fee Plan in place; therefore, there is no nexus which permits the City to assess a mitigation fee for Forrest Creste. However, the applicant is encouraged to work with the School District to develop and implement a plan for mitigation of any impacts from the project to the District. d) Parks and Recreation The project contains active recreational facilities for the residents of the townhouses and apartments. For example, a recreation center will be provided which contains facilities such as an exercise room, lounge, and cabana/meeting room facility. There will also be an outdoor swimming pool. In addition, one sports court and several children's play areas are provided throughout the site. Finally, a pedestrian walking/jogging trail winds through the site, providing both an active exercise amenity and an opportunity to observe the wetlands areas (benches/interpretive signs). Passive recreational open space in the project includes the wetlands and buffers and the landscaped areas surrounding the townhouses and apartment buildings. Additionally, pedestrian • I - FORREST CRESTE MITIGATION DOCUMENT -18- SEPTEMBER 22,1992 pathways are planned through each of the apartment areas containing recreational centers; pedestrian linkages to the nearby Orchards will be encouraged as well, both as a recreational amenity and to facilitate pedestrian travel/access to public transportation. • Staff will recommend the addition of congregate areas around mail box centers, including covered benches, lighting and plantings to serve as community gathering centers. Recreational facilities within a three mile radius include the playgrounds at Honeydew Elementary School, Kiwanis Park, Windsor Hills Neighborhood Park, Highlands Neighborhood Park and Community Center, Liberty Community Park, Cedar River Community Park, Gene Coulon Memorial Beach Park, and the proposed Heather Downs Neighborhood Park. Maplewood Golf course is also near the site. RECOMMENDED MITIGATION MEASURES: B.3.d) The applicant shall, in order to reduce the potential impacts on existing park and recreational facilities, pay a Parks Comprehensive Plan Mitigation Fee in effect at the time of issuance of a Building Permit for each element of the project. If no fee is in effect at that time, the applicant shall pay an off-site Park Mitigation Fee of $180 per multi-family unit or provide direct improvements to the equivalent of$180.00 per unit as approved by the Parks and Recreation Department according to City standards. • Note to Applicant #15: If the applicant cancels the Building Permit in writing, then the unencumbered portion of the fee plus accrued interest will be refunded to the applicant. B.3.e) The applicant shall, in order to reduce the potential impacts on existing park and recreational facilities, deed an additional right of way, if any, necessary to accommodate a bicycle path on the east side. of Duvall Avenue NE. The applicant shall receive a . credit toward any parks mitigation fees for the value of the bike path right(s) of way dedicated. The amount of the credit shall be determined by the Parks Department. B.3.f) The applicant shall, in order to reduce. the potential impacts .on existing park and recreational facilities, incorporate a system of pedestrian trails in wetland buffers, portions of wetland' buffers, and/or along drainage swales, provided that the trails not infringe on the inner 20 feet of any buffer. Trails should meet the standards of the Parks Department. The location of trails shall be approved by the Planning Section of the Development Services Division and the Parks Department as part of the site plan approval process and as part of the approval for the Wetland Mitigation Plan. B.3.g) The applicant shall, in order to improve on site recreational facilities, incorporate congregate areas around mail box centers, including weather protected seating areas, pedestrian scaled lighting, decorative paving and plantings to serve as community gathering centers. Plans for such centers shall be approved by the Development Services Division in conjunction with site plan review. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; Comprehensive Plan VII.H. and IX.D.; Comprehensive Park and Recreation Plan; Bicycle Trails Master Plan. e) Utilities The project site presently is not served by water or sewer service. Such services will need to be provided and Sewer Utilities Connection fees will need to be provided. 1) Water: The water supply for Renton is provided by an aquifer underlying Northeast Renton. The aquifer provides a reliable water source; water available to the site far • exceeds anticipated use levels. Water mains will need to be extended, as required by FORREST CRESTE MITIGATION DOCUMENT -19- SEPTEMBER 22,1992 City Code, to provide for domestic water use and to ensure adequate flow for fire-related emergencies. The applicant could satisfy City requirements by extending a 12 inch main along Duvall Avenue and developing an 8 inch to 12 inch looped water main for fire flow. Fire flow in the vicinity of the site is estimated at 3,000 gpm which is considered adequate by the Fire Department. RECOMMENDED MITIGATION MEASURES: • B.3.h) No mitigation measures are required to address environmental impacts, as these impacts are addressed by Code requirements. Note to Applicant #16: Special Utilities Connection Charges will be assessed by the Utilities Engineering Division, following finalization of site plan review, in conjunction with issuance of the building permits. 2) Sewer. The proposed Forrest Creste site is not currently served by sanitary sewer lines. It is located in the Heather Downs Drainage Basin an area of East Renton where lines are operating at or near capacity; a moratorium has been declared on the construction of new development in this area until sewer capacity can be provided. However, Forrest Creste and eight other developments in the area have been authorized by Council as eligible for limited exemption to this moratorium, because development ' applications were submitted to the City prior to adoption of Resolution No. 2764 which established the moratorium. Two options are available to serve Forrest Creste. If existing remaining sewer capacity is sufficient then the development could connect to ' the existing system. Or, interim improvements can be made to increase the available capacity of the sewer system. City Council must authorize any plan for providing , • temporary sewer service to the site. The applicant has elected to request City Council authorization to participate in the interim connection program. This program provides a solution which entails an interbasin transfer of flows from the Upper Heather Downs basin to the Lowell Maplewood basin. To accomplish this transfer, it is necessary to construct a lift station on a parcel to the south of the'adjacent Orchards site as well as a force main from this lift station to the intersection of NE 2nd and Monroe Avenue. The improvements will be financed by the developers of Forrest Creste and the developers of other projects (e.g., The Orchards) which will benefit from the improvements. When the East Renton interceptor (or an alternative permanent service line) is constructed, Forrest Creste. would be required to connect to that permanent system. RECOMMENDED MITIGATION MEASURES: B.3.i) No mitigation measures are required in conjunction with environmental review. Note to Applicant#17: In the absence of standard sewer systems, the applicant will be required to participate in the interim program authorized by Council Resolution 2764, or, develop an alternative system for provision of sanitary sewer service in accord with local regulations. . i FORREST CRESTE MITIGATION DOCUMENT -20- SEPTEMBER 22,1992 ., n 142 AVE SE N/0 SE 128 ST (SB)(LS-38)(9064) 2 DAY COUNT BEGINNING MAY 30 1990 MAY 0 0 30 28 1 0 0 HOUR MON TUE WED THUG FRI SAT SUN . 1 0 0 0 10 0 0 0 2 0 0 0 0 0 0 0 3 0 0 0 0 10 0 0 4 0 • 0 0 0 0 0 0 5 0 0 0 20 10 0 0 6 '0 0 0 20 20 0 . 0 7 0 0 0 60 60 0 0 8 0 . 0 0 90 80 0 0 9 0 0 0 60 60 0 0 10 0 .0 0 40 40 0 0 11 0 0 50 50 • 0 0 0 • 12 0 0 .40 50 0 0 0 13 0 0 80 60 0 0 0 14 0 0 : 50 50 0 0 0 15 0 0 140 140 0 0 0 16 0 0 100 . 60 0 0 0 17 0 0 50 50 0 0 0 18 0 0 60 60 0 0 0 19 0 0 70 70 0 0 0 20 0 0 90 60 0 0 0 21 0 0 40 70 0 0 0 22 0 0 20 30 0. 0 0 23=' 0 0 10 10 0 0 0 24 0 0 0 ' 10 0 0 0 TOT 0 0 - 800 1070 280 0 0 AMPK 0 0 70 . 110 0 0 0 AM HR 0 - 0 0 - 0 1100 - 1200 600 -- 700 0 - 100 0 - 0 0 - 0 AM FCTR 0 0 .875 .9166667 0 0 0 PMPK 0 0 140 . 140 0 0 0 PM HR 0 - 0 0 - 0 215 - 315 215 - 315 0 - 0 0 - 0 0 - 0 PM FCTR 0 0 .5 .4375 0 0 0 MAKS 0 0 640 560 0 0 0 THE 2 DAY ADT: 1075 THE 2 DAY AWT: 1075 THE AVERAGE AM PEAK: 90 THE AVERAGE PM PEAK: 140 THE AVERAGES ASSUMES 2 CONTINUOUS DAYS OF DATA APE4 9119 TYPE WARR - t,,, SE 128 ST E/0 142 AVE SE (VB)(LS-50)(9064) _ , i i 2 DAY COUNT BEGINNING MAY 30 1990 MAY 0 0 30 28 1 0 0 HOUR MON TUE WED TRUE FRI SAT SUN 1 0 0 0 30 50 0 0 2 0, 0 0 30 30 0 0 • 3 0, 0 0 10 60 0 0 4 0; 0 0 40 110 0 0 5 0, 0 0 140 440 0 0 6 0 0 0 690 1210 0 0 7 0 0 0 1360 1530 0 0 8 0, 0 0 1500 960 0 0 9 0 0 0 860 610 0 0 10 0, 0 0 630 200 0 0 11 0 0 620 590 0 0 0 12 0' 0 . 590 610 0 0 0 13 0' 0 530 570 0 0 0 14 0 0 560 540 0 0 0 15 0 0 700 610 0 0 0 16 0 0 710 730 0 . 0 0 17 0 0 740 730 0 0 0 18 0 0 800 830 0 0 0 . 19 0 0 850 800 0 0 0 20 0 0. 560 700 0 0 0 21 0 0 410 490 0 0 0 22 0 0 260 340 0 0 0 23 0 0 170 200 0 0 0 ' 24 10 0 80 110 0 0 0 TOT 110 0 7580 13140 5200 0 0 , AMPK 10 0 630 1600 0 0 0 AM HR 0 0 0 - 0 1045 - 1145 600 - 700 0 - 100 0 - 0 0 - 0 AM FCTR ,,0 0 .875 .9302326 0 0 0 1 PMPK :0 0 850 850 0 0 0 PM HR 0 li 0 0 - 0 615 - 715 530 - 630 0 - 0 0 - 0 0 - 0 PM FCTR 0 0 .8854167 .9239131 0 0 0 MAI8 .0 0 5480 6810 0 0 0 THE 2 DAY ADT: 12960 i THE 2 DAY AWT: 12960 I THE AVERAGE AM PEAK: 1115 THE AVERAGE PM PEAK: 850 THE AVERAGES ASSUMES 2 CONTINUOUS DAYS OF DATA TAPE# 9118 TYPE WARE 1 1 I SE 128 ST W/O 142 AVE SE (EB)(LS-37)(9064) • 2 DAY COUNT BEGINNING MAY 30 1990 HAY 0 0 30 28 1 0 • 0 HOUR MON TUE WED THUG FRI SAT SUN 1 0 0 0 70 100 0 0 2 0 0 0 50 60 0 0 3 0 0 0 30 30 0 0 4 0 0 0 20 30 0 0 5 0 0 0 50 50 0 0 6 0 0 0 140 150 0 0 7 0 0 0 380 380 0 0 8 0 0 0 400 . 350 0 0 . 9 0 0 0 340 400 0 0 10 0 0 0 380 240 0 0 11 0 0 660 520 0 0 0 12 0 0 590 610 0 0 0 13 0 0 630 580 0 0 0 14 0 0 700 680 0 0 0 15 0 0 1100 1060 0 0 0 16 0 0 1530 1490 0 0 0 17 0 0 1630 1620 0 0 0 18 0 0 1500 1380 0 0 0 19 0 0 900 890 0 0 0 20 0 0 750 820 0 0 0 21 0 0 640 680 0 0 0 22 0 0 420 480 0 0 0 23 0 0 230 300 0 0 0 24 0 0 170 190 0 0 0 . TOT 0 0 11450 13160 1790 0 0 AMP! 0 0 660 610 0 0 0 AM HR 0 - 0 0 - 0 1015 - 1115 1115 - 15 0 - 100 0 - 0 0 - 0 AM FCTR 0 0 .6875 .8472222 0 0 0 PMPK 0 0 1640 1630 0 0 0 PM HR 0 - 0 0 - 0 300 - 400 430 - 530 0 - 0 0 - 0 0 - 0 .PM FCTR 0 • 0 .9534884 .9476744 0 0 0 MAX8 0 0 8750 8620 0 0 0 THE 2 DAY ADT: 13200 . THE 2 DAY AWT: 13200 . THE AVERAGE AM PEAK: 635 THE AVERAGE PM PEAK: 1635 THE AVERAGES ASSUMES 2 CONTINUOUS DAYS OF DATA TAPE# 9117 TYPE WARR f SE ,28 ST EIO 148 AVE SE (VB (LS-201(91211 2 DAY COUNT BEGINNING NOVEMEER 28 1989 NOVEMBER . 28 29 30 0 0 0 HOUR M.ON TUE WED TRUE FRI SAT SUN 1 ' 0 0 10 20 0 0 •0 2 0 0 20 10 0 0 0 2 C 0 30 30 0 0 0 4 0 0 70 70 0 0 C 5 0 0 440 440 0 0 0 6 0 0 980 -23'9—. 0 0 0 7 0 • 0 1120 0— 0 - 0 0 8 0 • 0 590 0--- 0 0 0 9 0 ' 0 500 1'E0-- 0 0 0 10 3 0 360 440-- 0 0 0 11 3 80 410 1-98 C 0 0 12 0 30 410 0 0 0 0 12 0 400 290 0 0 0 0 14 0 440 46C 0 A a 0 15 0 420 480 0 0 0 0 1E 0 513 550. 0 0 0 0 17 0 493 550 0 0 0 0 18 0 520 600 0 0 0 0 19 0 360 33a 0 0 0 0 20 0' . 220 26D 0 0 0 0 21 3 170 190 0 0 0 0 22 0' 120 110 0 0 0 0 a 0 0 0 . L3 i �:t 7i v -_ 24 01 50 40 0 0 C 0 • 0;' 4220 8980 . 1620 0 0 0 Av-_ 0 . 380 1143 0 0 0 - 0 AM .., 0 - : 0 11100 - 1203 5 0 - 6C0 0 - 100 0 - 0 0 - 0 0 - • 0 AM F'TR .8636364 .890525 0 0 0 0 . _ - . 530 520 0 0 0 0 PM HE 0 - ' 0 515 - 615 40 - 500 0 - 0 0 - 0 0 - 0 0 - 0 PK FCTR 0' .9464286 .8611111 0 0 0 0 MAFB 0' 3510 4810 0 0 C 0 ' THE 2 DAY ADT: 7420 THE 2 DAY ANT: 7420 THE AVEEA2E AM PEAK: 760 TEE AVERAGE PM PEAK: 575 THE AVEEAGES ASSURES 2 CONTINUOUS DAYS OF DATA TAPE# 179 TY?EIAEE . :48 AVE SE N/C SE 128 ST ISB 1S-45 (9:2i; 3 DAY COUNT BEGINNING NOVEMBER 28 1989 NOVEMEIR 0 28 29 28 1 0 0 HOUR MON TUE WED THURR FRI SAT SUN 1 3 . 0 0 13 0 0 0 2 0 3 0 0 0 0 0 3 0 0 0 0 0 0 0 4 0 0 0 0 10 0 0 5 0 0 20 10 10 0 0 6 0 0 60 50 60 0 0 7 0 0 • 60 70 60 0 0. 8 0 0 80 80 80 0 0 9 0 0 50 70 60 0 0 10 0 0 70 70 90 0 0 11 0 2.° 40 50 20 0 0 1: 0 10 63 80 0 0 0 _. 0 40 40 50 0 0 0 14 60 50 50 0 0 0 1: 0 50 51 80 0 0 0 16 0 100 8C 80 0 0 0 17 0 70 80 60 C 0 0 18 C 50 70 80 0 0 0 13 . 0 5: 60 50 0 0 0 2' C 30 40 40 0 C 0 :1 C 50 20 50 0 0 0 22 0 40 20 40 0 0 0 23 0 iG 10 20 0 0 0 24 0 10 10 :0 . 0 - 0 0 _- TOT U 650 970 1080 390 0 0 AMF R 6 82 90 90 0 0 0 AM ER 0 - 0 " 1000 - 1100 600 - 700 600 - 700 0 - 100 0 - 1 0 - 0 AF. FCTh 0 .66e6C67 .75 .75 0 0 0 PMPE 0 100 100 110 0 0 0 ?M H:. 0 - 0 515 - 415 245 - 345 1145 --1155 0 - 0 0 - 0 0 - 0 1M FAT? C .8533333 .8333333 .55 0 C 0 MA%8 0 490 490 530 0 0 •0 THE 3 DAY ACT: 1030 THE 3 DAY AB' _ 1030 THE AVERAGE AM PEAR: 86.66666 THE AVERAGE PM PEAK: 105.3333 THE AVERAGES ASSJXES 3 CONTINUOUS DAYS OF DATA LPEt 180 T!FE WARE SE 123 ST W/O 148 AVE SE IES'( 8-401(91211 _ • 3 DAY COUNT BEGINNING NOVEMSEE 28 1989 28 29 28 1 0 0 HOUR MO? TUE WED TE:IE FBI SAT SUN nn nn ,nn n r. 0 0 33 3 123 3 3 2 0 C 40 50 40 0 0 3 0 0 20 20 50 0 0 4 0 0 20 20 10 0 0 5 0 0 20 23 30 0 0 E C 0 93 70 10 0 0 1 0 0 220 240 190 - 0 0 8 C 0 310 290 310 0 0 9 0;; 0 280 220 280 ' 0 0 10 3 ° 13 270 270 0 0 IC N i J 2tJ Li II '; 170 340 290 160 3 0 :2 0. 430 4E0 L40 0 0 0 11 ' 0 429 410 310 0 0 0 450 470 4E0 0 C 0 P 6E9 630 570 0 0 1E 9 1340 1050 1010 0 0 0 17 0: 114" ,,E1 1120 0 0 0 18 0 10F,C 970 1110 0 0 C 19 0 71. 660 820 0 0 0 . 2: 0,, 49C 500 490 0 0 0 C: 410 443 450 0 0 C • 53 180 420 0 0 0 . 200 1:0 253 C 0 0 24 `i 141. 150 150 0 3 0 TOT 7E63230 9230 1532 0 0 A°:_ i1 430 4E0 470 0 0 0 . AM HE C -,' . :033 - 1130 :115. - 15" 1123 - 33 0 - 100 0 - 0 0 - 0 AM COTE 0 .7235 82 .95E3233 '903E461 0 0 "r!!:E 11E i 1.E3 1140 0 0 0 PM HE 0 - 430 - 530 415 - 515 445 - 545 0 - 0 0 - 0 0 - 0 PM FC.8 0 .921875 .8939394 .95 0 0 0 HA%8 0 5960 5950 6030 0 0 C TEE 3 DAY ADT: 9218.667 TEE 3 DAY AWT: 9216.667 • THE AVERAGE AM FEAR: 473,3333 TEE AVERAGE PM PEAK: 11E .667 •E` ASSUMES DATA AVERAGES 3 CONTINUOUS DAYS OF TAPEt 17e TYPE WA ER ' 1M7.. • elf 1udl VEHICULAR ' to =.�_^ Date 3-1`�_90__ Day � e cl Location (D� Co9�t 357 ►: ;_•? ._ a� Checker i_1'1_ Lb' r4 _ Weather Ovenc�st (I NI(-)I Checker _ Surface MI y =cv cr Checker----------- Summc��,� 5C 12'd 5+ �N — s 1 sE ►2$ 5+ UMMI NORTH SIDE I-sTri 'DTAL c N :t- , !;j;! N!IOUTBOUND-TOTAL. 10-8-6 I= --- `_ IN SOUND —TOTAL 1-2-3 4-! T __---HOUR — TOTAL . a' 1 (Al r-�°m 16 Hour Factor_ _ A °�I N1'= Calculated 16 Hr. Total. Summer Factor- 16 Hr. �i --� �y-0 __g�_ _ `71 OD MD 16Hr. -Total-Summer Factor-Ave.24 Hr.Day -I 1 513 Ave. 24 Hr. Day-Total. _2-_ HOUR VEHICULAR COU 1 5 MINUTE From N on 13, 11-e543___ 'From Eon Sc_ 12b $ t FromS on l3.6 51 ---- INTERVAL LEFT THRU RIGHT INTERVAL, LEFT THRU RIGHT INTERVAL LEFT THRU RIGHT INT I I N a I Z 3 TOTAL. 4 5 6 TOTAL T 8 9 T( 0 ,15 163 v ED 1 -1- 2r� 11 9 21 12`I 4 G trig (o G 10 2 3c02___ Ic. t.tl. -y2 - ---.7 - -S`� -�- -�-L-- - 15 L _-a�_ ►e�- t -a-- --et, _. - _ I. _c15 i$ 1or, 3• . .56. I 7 'S. , it o , 16`r- I _r_ r) -L-• 2 ;uv_L5I5 ca:Q_- l - -3�- • -L -'_-.'±-=- L__-- _ _Ih5_'.- -- --2- :.__5- __L {5�!� 1 0, o - - t" 13f} :) Z 1 I'9 I'1 (o" �t. 2 1_1.51u _15z1 ..°3 `Fs_ _ 1100 ` 9__ _1`L�_ _`�$_ _L`i (? - - _ __3 _ _ isgs IL�Ov e-o- -- . 9I 133 3 12-3 , 4�4 1`12 r) 6 I 1 ITLTtTTTIITTI 0 ct;� = Electronic Card File = { Sub.jec, 1-405 Title AC89 I-405 NB OFF RAMP id NE PARK DR Filed By TE1 06/13/89 Changed By date 04 89 AWDT total N/A AWDT NB 3471 AWDT SB N/A TOTAL AM End Hr Vol PM End Hr Vol i;lk NE. HfI End Hr 0700 Voi 630 PM End Hr i500 Vol 245 DIR AM End Hr Vol PM End Hr Vol Station Number I NN89 Street Name I-405 Indexed By - CI 1-405 NOT NUMBERED 89 (ENTER)Next (5)Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit Ctrl/A Options; ALT/Z Help; Ctrl/End Exit L N E110ADEM0 = Electronic Card File = Subject I-405 Title AC89 I-405 SB ON RAMP 8 N PARK DR Filed By TE1 06/13/89 Changed By P35 06/21/90 date 04 89 AWDT total N/A AWDT NB N/A AWDT SB 5900 TOTAL AM End Hr Vol PM End Hr Vol DIR AM'End Hr Vol PM End Hr Vol DIR SB AM End Hr 0800 Vol 350 PM End Hr 1600 Vol 860 • Station Number I NN89 Street Name 1-405 Indexed By • Cl 1-405 • N PARK DR NOT NUMBERED 89 • (ENTER)Next (5) Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit Otri/A Options; ALT/Z Help; Ctri/End Exit 1 N 2110ADEM0 _ Electronic Card File = Subject 1-405 i:l e AC89 1-405 NB ON RAMP I° NE PARK DR Filed Dv TE1 06/13/89 Changed By cat e 04 59 AWDT total N/A AWDT NB 4791 AWDT SB N/A TOTAL AM End Hr Vol PM End Hr Vol ' ;'1r" NB AN End Hr 0800 Vol _:S PM End Hr 1700 Vol •SCO DIR AM End Hr Vol PM End Hr Vol Station Number I NN89 Street Name I-405 Indexed By • Cl I-405 NOT NUMBERED 89 (ENTER)Next (5) Remove (9)Change ;12)Tag (13)Print (15) Info (16)Exit tri/A Options; ALT/Z Held; Ctrl/End Exit L N 2110ADEM0 = Electronic Card File = Subject 1-405 • Title AC89 I-405 SB OFF RAMP 8 NE PARR. DR Filed By TE1 06/13/89 Changed By date 04 89 AWDT total N/A AWDT NB N/A AWDT SB 10675 TOTAL AM End Hr Vol PM End Hr Vol DIR AM End Hr Vol PM End Hr Vol DIR SB AM End Hr 0800 Vol 1300 PM End Hr. 1800 Vol 930 Station Number I NN89 Street Name I-405 Indexed By Cl 1-405 NOT NUMBERED 89 (ENTER)Next (5) Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit ;tri/A Options; ALTiZ Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject T MCO23P 89 _ l ' Title TMC89P N PARK DR/I-405 SB RAMPS Filed By TEl 05/22/89 Changed By T E1 07/03/89 DATE 04 25 89 DAY TUE PK HR 1515-1615 COUNT TIME 1500-16,15 INIT OTC INT* 023 A/M/P P WEATHER CLOUDY SURFACE UNK NB: LEFT,N/A THRU N/A RIGHT N/A TOTAL IHV PHF 'r'CL'S Lave: . OW c i ncc: ;i H SB: LEFTj125 THRU 5 RIGHT 311 TOTAL 441 HV 0.0 PHF UNK PEDS UNK ON STREET . 1-405 SB OFF RAMP EB: LEFTIN/A THRU 1313 RIGHT 582 TOTAL 1995 %HV 0.0 PHF UNK PEDS UNK ON STREET N PARK DR WB: LEFT127 THRU 242 RIGHT N/A TOTAL 369 '%•HV 2.0 PHF UNK PEDS UNK', ON STREET N PARK DR Indexed By Tl I-405 N PARK DR TMCO23P 891 (ENTER)Next (5)Remove (9)Change (11)Prev (18)Tag (13)Print (15) Info (16)Exit Ctrl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEit1O l • • • • • i ' • = Electronic Card File = Subject T;1CO23A 89 Title TMC89A N PARK DR/I-405 SB RAMPS Filed By TE1 05/22/89 Changed By TEl 07/03/89 DATE 04 25 89 DAY TUE PR HR 0630-0730 COUNT TIME 0600-0730 INIT CTC INTr 023 A/M/P A WEATHER CLEAR SURFACE UNK NB: LEFT N/A THRU N/A RIGHT N/A TOTAL %HV PHF PEDS UNK ON STREET N/A SB: LEFT 21. THRU 1 RIGHT 750 TOTAL 772 %HV 0. 0 PHF UNK PEDS UNK ON STREET 1-405 SB OFF RAMP EB: LEFT N/A THRU 141 RIGHT 18 TOTAL 159 %•HV 2. 0 PHF UNK PEDS UNK ON STREET N PARK DR WB: LEFT 267 THRU 1064 RIGHT N/A TOTAL 1331 %HV 1. 0 PHF UNK PEDS UNK ON STREET N PARK DR Indexed By T1 1-405 N PARK DR TMCO23A 89 (ENTER)Next (5)Remove (9)Change (12)Tag .13)2rint (15) Info 1.6)Exit 2tr1/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject TMC0S3P 88 Title TMC88P N PARK DR/405 SB ON-OFF RAMPS Filed By TEl 10/03/88 Changed By TEl 07/03/89 DATE 06 01 88 DAY WED PK HR 1530-1630 COUNT TIME 1500-1700 INIT GEH INT# 023 A/M/P P WEATHER OVERCAST SURFACE DAMP NB: LEFT N/A THRU N/A RIGHT N/A TOTAL %HV PHF PEDS UNK ON STREET N/A EB: LEFT 160 THRU 1 RIGHT 197 TOTAL 304 %HV 1.6 PHF 0. 84 PEDS UNK ON STREET 1-405 SB OFF RAMP EP: LEFT N/A THRU 1101 RIGHT 335 TOTAL 1437 HV 2. 1 PHF 0.88 PEDS UNK ON STREET N PARK DR WB: LEFT 131 THRU 173 RIGHT N/A TOTAL 303 ''/•HV 7. 9 PHF 0.83 PEDS UNK ON STREET N PARK DR Indexed By T1 1-405 N PARK DR TMCO23P 88 (ENTER)Next (5)Remove (9)Change (11)Prev (12)Tag .i3)Print (15) Info (16)Exit Otri/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject TMC037A 85 Title TMC89A N 3RD ST/SUNSET BL N Filed 6y TEl 05/22/89 Changed By P33 06/21/90 DATE 24 L5 59 SAY TUE PK HR '30-0730 COUNT TIME UNK :NIT :TC 'NTT; 037 AZMZP A WEATHER UNK SURFACE UNK NB: LEFT 439 THRU 126 RIGHT 232 TOTAL 797 %HY 4.0 PHF UNK PEgb uNK, ON STREET SUNSET EL N SB: LEE\ 21 THRU 695 RIGHT 1118 TOTAL 1834 %HY 2. 0 PHF UNK PEDS UNK ON STREET SUNSET BL N ES: LEFT 255 THRU 182 RIGHT 60 TOTAL 497 %HY 5. 0 PHF UNK PEDS UNK ON STREET N 3RD ST WE: LEFT 925 THRU 693 RIGHT 102 . TOTAL 1720 %HV 3. 0 PHF UNK PEDS UNK ON STREET N 3RD ST ' Indexed By T1 N 3RD ST T4lC003 A 89 NE 3RD ST SR 800 SUNSET N (ENTER)Next (3)Remove (9)Change (12)Tag (13)Print (15) Info (16)Exit Ctrl/A Options; ALTZZ Help; Ctrl/E d Exit L N 2220ADEMO = Electronic Card File = Subject TMC037P 87 Title TMCB7P N 3RD ST/SUNSET BL N Filed By TE1 11/08/88 Changed By P35 06/21/90 DATE 05 12 87 DAY TUE PK HR 1530-1630 COUNT TIME 1500-1700 INIT G H INT# 037 AZMZP P WEATHER CLEAR SURFACE DRY NE: LEFT 45 THRU 262 RIGHT 778 TOTAL 1089 %HY 2.6 PHF 0. 97 PEDS . STREET SUNSET 5L N SB: LEFT 71 THRU 805 RIGHT 365 TOTAL 1241 %HV 3. 1 PHF 0.90 PEES ON STREET SUNSET BL N : LEFT 536 THRU 899 RIGHT 413 TOTAL 1848 %Hl.k 1. 0 PHF 0.96 REDS ON STREET N 3RD ST WE: LEFT 532 THRU 215 RIGHT 82 TOTAL 829 %HV 1.2 PHF 0. 93 PEDS ON STREET N 3RD ST Indexed By Ti N 3RD ST TMCOS7P 37 NE 3RD ST SR 500 • SUNSET BL N ENTER)Next (5)Remove (9)Change (11)Prev (12)Tag (13)Print '13) Info (16)Exit Ctrl/A Options; AL/Z Help; Etrl/End Exit L N 211OADE4O _ .=lectronic Card File = Subject TMC037P 87 NO. 2 Title TMC87P N 3RD ST/SUNSET BL N Filed By TE1 11/08/88 Changed By P35 'L6/21/90 .:;ATE 05 19 37 DAY TUE PR HR 1530-1630 COUNT TIME 1530-1630 INIT GEH INT# 037 A/M/P P WEATHER CLEAR SURFACE DRY NB: LEFT 45 THRU 302 RIGHT 774 TOTAL 1121 %HV 2. 4 PHF 0.87 PEES UI' STREET SUNSET LPL N SB: LEFT 75 THRU 271 RIGHT 333 TOTAL 1279 %HV 1. 9 PHF 0. 96 PEGS ON STREET SUNSET BL N EB: LEFT 512 THRU 806 RIGHT 440 TOTAL 1758 %HV 1.2 PHF 0. 94 PEDS ON STREET N 3RD ST WB: LEFT 522 THRU 242 RIGHT 73 TOTAL 837 %HV 2. 3 PHF 0.83 PEGS ON STREET N 3RD ST indexed By T1 N 3RD ST NO. 2 TMC037P 87 NO. 2 NE 3RD ST NO SR 900 t 2 SUNSET BL N NO. (ENTER)Next (E) Remove (9)Change (11)Prev (12)Tag (13)Print (15) Inro (16)Exit ;trl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File Subject TMC037P 87 NO. 3 Title TMC87P N 3RD ST/SUNSET BL N Filed By TE1 11/08/88 Changed By P35 06/21/90 DATE 05 27 87 DAY WED PR HR 1530-1630 COUNT TIME 1530-1630 INIT PJC INT# 037 A/M/P P WEATHER CLEAR SURFACE DRY NB: LEFT 68 THRU 285 RIGHT 700 TOTAL 1053 %HV 2.5 PHF 0. 83 PEDS ON STREET SUNSET EL N BB: LEFT. 55 THRU 809 RIGHT 312 TOTAL 1176 %HV 2.8 PHF 0. 95 PEDS ON STREET SUNSET BL N EB: LEFT 474 THRU 772 RIGHT 417 TOTAL 1663 %HV 1.4 PHF 0.96 PEDS ON STREET N 3RD ST WB: LEFT 557 THRU 243 RIGHT 60 TOTAL 860 %HV 1.6 PHF 0. 86 PEDS ON STREET N 3RD ST Indexed By T1 N 3RD ST NO. 3 T NC03 7 P Si NO. 3 NE 3RD ST #3 SR 900 #3 SUNSET EL M NO. ENIER)Next (5)Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit Otr-•l/A Options; ALT/Z Help; Ctrl/End Exit L N 3110ADEMO • _i c7ronic Carr File = SUdj�" - t 71CO25A 90 Title TMC90A NE PARK DR/SUNSET EL NE Filed By TEl 05/08/89 Changed By T51 05/25/90 :ATE __ 25 :0 DAY FRI PR HR 0645-0745 COUNT TIME 0615-0800 :NIT RSC iT: 02 A; 1/F A WEATHER CLOUDY SURFACE DRY NB: LEFT 44 THRU '% RIGHT 39 TOTAL 133 HV 0. 8 PHF 7.89 'EDS 0 ON J i rtm , SE: _EFT 'Z THRU 0 RIGHT 0 TOTAL 0 %HV 0.0 PHF 0. 00 FEDS } ' ON STREET SE: LEFT. 0 THRU 281 RIGHT - TOTAL 287 %HV 1. 9 PHF 0. 97 FEDS 0 ON STREET WE: LEFT 16E THRU 1304 RIGHT 0 TOTAL 1466 HV 0. 6 PHF 0. 75 PEDS 0 ON STREET indexed By! 71 NE PARK DR SR 900 SUNSET EL NE T 1COS5R 90. NTER)Next .E)Remove (9)Change t 12)Tag- (i3)Print (_O) Info (16)Exit Ctr-•i/A Cotiuns; HLT/Z Help; Ctri/End Exit L N 2110ADEMO = Electronic Card File = Subject TMCO25P 88 Title TMC8SP NE PARK DR/SUNSET EL NE Filed By TE1 10/03/88 Changed By P35 06/21/90 DATE 09 20 88 DAY TUE PR HR 1530-1630 COUNT TIME 1500-1700 IiNIT RMH INT# 025 A/M/P P WEATHER SUNNY SURFACE DRY NB: LEFT 17 THRU 0 RIGHT 273 TOTAL 290 HV 1. 0 PHF 0. 91 REDS ON STREET SUNSET BLVD NE 33: LEFT 0 THRU 0 RIGHT 0 TOTAL 0 %HV 00 PHF FEDS ON STREET N/A T INTERSECTION EB: _EFT 0 THRU 1309 RIGHT 46 TOTAL 1355 /.HV 1. 1 PHF 0. 94 FEDS ON STREET NE PARK DR WE: LEFT 148 THRU 436 RIGHT 0 TOTAL 584 %HV 4. 3 PHF 0. 28 REDS ON STREET NE SUNSET BL • Indexed By 71 NE PARK DR SUNSET EL NE TMCO2SF 08 (ENTER)Next (5)Remove ,)'Change (11)Prev '(12)Tag (13) tri r.t .IE) Into _wr l/A Options; ;ALT/Z Help; Ctrl/End Exit _ N SIIORD O = Electronic Card File = Subject TMC041A 86 Title TMC86A NE SUNSET BL / NE 10TH ST Filed By TE1 11/18/88 Changed By TEI 04/26/89 DATE 07 17 86 DAY THU PK HR 0700-0800 COUNT TIME 0700-0900 INIT JH INT# 041 A/M/P A WEATHER OVERCAST SURFACE DRY NB: LEFT 11 THRU 207 RIGHT 26 TOTAL 244 %HV PHF PEDS UN STREET NE SUNSET BL SB: LEFT 9 THRU 966 RIGHT 2 TOTAL 977 %HV PHF PEDS ON STREET NE SUNSET BL EB: LEFT 2 THRU 11 RIGHT 14 TOTAL 27 %HV PHF PEDS ON STREET NE 10TH ST WB: LEFT 92 THRU 14 RIGHT 12 TOTAL 118 %HV PHF PEDS ON STREET NE 10TH ST Indexed By T1 NE 10TH ST NE SUNSET BL TMC041A 86 (ENTER)Next (5)Remove (9)Change (12)Tag (13)Print (15) Info (16)Exit 2trl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject TMC041P 88 Title TMC88P NE SUNSET BL/NE 10TH ST Filed By TE1 10/04/88 Changed By TE1 04/26/89 DATE 08 16 88 DAY TUE PK HR 1600-1700 COUNT TIME 1530-1700 INIT MRH • INT# 041 A/M/P P WEATHER CLEAR SURFACE DRY NB: LEFT 69 THRU 58 RIGHT 60 TOTAL 186 %HV 2.3 PHF 0. 75 PEDS ON STREET NE SUNSET BL SB: LEFT 13 • THRU 47 RIGHT 16 TOTAL 76 %HV 0 PHF 0.77 PEDS ON STREET NE SUNSET BL EB: LEFT 50 THRU 1150 RIGHT 102 TOTAL 130E %HV 1.2 PHF 0.9E PEDS ON STREET NE 10TH ST WB: LEFT 86 THRU 471 RIGHT 8 TOTAL 565 %HV 2. 5 PHF 0.90 PEDS ON STREET NE 10TH ST Indexed By T1 NE 10TH ST NE SUNSET BL TMC041P 88 (ENTER)Next (5)Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit Ctrl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject TA1C04EA 86 Title TMC86A NE SUNSET BL / NE 12TH ST Filed By TE1 -11/18/88 Changed By TE1 04/26/89 DATE 06 01 86 DAY TUE PK HR 0700-0800 COUNT TIME 0700-0900 INIT JH INT# 042 Ail/P A WEATHER OVERCAST SURFACE DRY NB: LEFT 17 THRU 172 RIGHT 22 TOTAL 211 %HV PHF PEDS UIV STREET NE SUNSET LPL :SP: LEFT 14 THRU 835 RIGHT 64 TOTAL 913 /HV PHF PEDS ON STREET NE SUNSET BL ES: LEFT 46 THRU 56 RIGHT 22 TOTAL 124 %HV PHF PEDS ON STREET NE 12TH ST WB: LEFT 88 THRU 95 RIGHT 15 . TOTAL 198 %HV PHF PEDS 1 ON STREET NE 12TH ST Indexed By , T1 NE .112TH ST NE SUNSET BL TMC042A 86 ( E•dTER)Next (5)Remove (9)Change (12)Tag (13)Print (15) info (16)Exit Ctrl/A Options; ALT/Z Help; Ctrl/End, Exit L N 2110ADEMO = Electronic Card File = Subject TMC042P 88 Title TMC88P NE SUNSET BL/NE 12TH ST Filed By TE1 10/04/88 Changed By TE1 04/26/89 DATE 08 17 88 DAY WED PK HR 1600-1700 COUNT TIME 1545-1700 INIT MRH INT# 042 A/M/P P WEATHER CLEAR SURFACE DRY NB: LEFT 24 THRU 1037 RIGHT 101 TOTAL 1161 %HV 2. 3 PHF 0.89 PEDS -ON STREET NE'SUNSET BL SP: LEFT 43 THRU 467 RIGHT 90 TOTAL 600 %HV 1.4 PHF 0.91 PEDS ON STREET NE SUNSET BL ES: LEFT 179 THRU 179 RIGHT 26 TOTAL 384 %HV 1. 4 PHF 0.90 PEDS ON STREET NE 12TH ST WB: LEFT 73 THRU 108 RIGHT 60 TOTAL 241 %HV 1.3 PHF 0. 91 PEDS ON STREET NE 12TH ST indexed By T1 NE 12TH ST NE SUNSET BL TMC042P 88 • (ENTER)Next (5)Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit Ctrl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO • = Electronic Card File = Subject ?MC1O4P 88 Title TMC88P NE 3RD ST/JEFFERSON AV NE Filed By TE1 10/10/88 Changed By TE1 01/03/90 DATE 10 07 88 DAY. FRI PR HR 1545-1645 COUNT TIME 1515-1700 INIT RMH INT# 104 A/M/P P WEATHER CLOUDY SURFACE DRY NB: LEFT 48 THRU 7 RIGHT 24 TOTAL 79 %HV 2.5 PHF 0.79 PhDb UN blfiLET JLF EKSUN Hi) NE SB: LEFT 132 THRU 1 RIGHT 20 TOTAL 153 %HV 5. 2 PHF 0.96 PEDS ON STREET JEFFERSON AV NE EB: LEFT 78 THRU 1452 RIGHT 17 TOTAL- 1547 %HV 2.5 PHF 0.90 PEDS ON STREET NE 3RD ST NB: LEFT 18 THRU 699 RIGHT 20 TOTAL 737 %HV 5.2 PHF 0.96 PEDS ON STREET NE 3RD ST Indexed By T1 JEFFERSON AV NE NE 3RD ST NE 4TH ST TMC104P 88 - (ENTER)Next (5)Remove (9)-Change -(12)Tag (13)Print (15) Info (16)Exit ;tri/A 'Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject TMC044P 86 _ Title TMC86P NE SUNSET BL / DUVALL AV NE Filed By TE1 11/18/88 Changed By TEI 14/26/89 DATE 06 26 86 DAY THU PR HR 1600-1700 COUNT TIME 1500-1700 MIT BM INTl 044 A/M/P P WEATHER SUNNY SURFACE DRY NB: , LEFT 68 THRU 258 RIGHT 45 TOTAL 371 %HV PHF PEES UIV STREET DUVALL AV I'1C SB: LEFT 79 THRU 341 RIGHT 200 TOTAL 620 %HV PHF PEDS ' ON STREET DUVALL AV NE EB: LEFT 272 THRU 443 RIGHT 69 TOTAL 784 %HV PHF PEDS ON STREET NE SUNSET BL WB: LEFT 48 THRU 215 RIGHT 47 TOTAL 310 %HV PHF PEDS , ON STREET NE SUNSET BL Indexed By T1 DUVALL AV NE NE SUNSET BL TMC044P 86 (ENTER)Next (5) Remove (9)Change (ii)Prev (12)Tag (13)Print (1S) Info (16)Exit Ctri/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = • Subject TMC044P 88 Title TMC88P NE SUNSET BL/DUVALL AVE NE Filed By TEl 10/04/88 Changed By TE1 03/19/90 DATE 09 26 88 DAY MON PK HR 1600-1700 COUNT TIME 1530-1700 INIT RMH INTl 044 A/M/P P WEATHER RAINY SURFACE WET NB: LEFT 67 THRU 222 RIGHT 44 TOTAL 333 %HV 4.8 PHF 0. 90 PEDS ON STREET DUVALL AVE NE SB: LEFT 58 THRU 366 RIGHT 227 TOTAL 651 %HV 3.2 PHF 0. 94 PEDS ON STREET DUVALL AVE NE EB: LEFT 334 THRU 521 RIGHT 83 TOTAL 938 %HV 1. 3 PHF 0. 92 PEDS ON STREET NE SUNSET BL WB: LEFT ,46 THRU 254 RIGHT 47 TOTAL 347 %HV 2. 0 PHF 0. 92 PEDS ; ON STREET NE SUNSET BL (SR900) Indexed By T1 DUVALL AV NE NE SUNSET BL TMC044P 88 (ENTER)Next (5) Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit Ctrl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEM0 • = Electronic Card File = Subject TMC044A 86 Title TMC86A NE SUNSET EL / DUVALL AV NE Filed By TE1 11/18/88 Changed By TEl 03/19/90 DATE 07 22 86 DAY TUE PK HR 0700-0800 COUNT TIME 0700-0900 INIT .i H , INTl 044 A/M/P A WEATHER CLOUDY SURFACE DRY NB: LEFT 32 THRU - 171 RIGHT 10 , TOTAL 213 %HV PHF • L:tll5 UN. S T REE T DUVALL AV N SB: . LEFT 28 . THRU 98 RIGHT 117 TOTAL 242 %HV PHF PEDS ON STREET DUVALL AV NE ES: LEFT 96 THRU 102 'RIGHT 16 TOTAL 214 %HV PHF PEDS ON STREET NE SUNSET BL WB: LEFT 24 •THRU 182 RIGHT 20 TOTAL 226 %HV PHF PEDS ON STREET NE SUNSET BL Indexed By Ti DUVALL AV NE NE SUNSET BL TMC044A 86 (ENTER)Next (5)Remove (9),Change (12)Tag (13)Print (15) Info (16)Exit trl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEM0 = Electronic Card File-= Subject TMC044A 86 Title TMC86A NE SUNSET BL / DUVALL AV NE Filed By TE1 11/18/88 Changed By TE1 04/26/89 DATE 06 30 86 DAY MON PK HR 0700-0800 COUNT TIME 0700-0900 INIT BM INTO# 044 A/M/P A WEATHER SUNNY SURFACE DRY NB: LEFT 44 THRU 241 RIGHT 15 TOTAL 300 %HV PHF PEDS ON STREET DUVALL AV NE SB: LEFT 18 THRU 99 RIGHT 175 TOTAL 292 %HV PHF PEDS ON STREET DUVALL AV NE EB: LEFT 146 THRU 113 RIGHT 10 TOTAL 269 %HV PHF PEDS ON STREET NE SUNSET EL WB: LEFT 12 THRU 391 RIGHT 20 TOTAL 423 %HV PHF PEDS ON STREET NE, SUNSET BL Indexed By T1 DUVALL AV NE NE SUNSET EL TMC044A 86 (ENTER)Next (5)Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit ,, i/A Options; ALT/Z Help; Ctrl/End Exit L N 211OADEM0 = Electronic Card File = S'_tb.;ect TMC103R 88 Title TMC88R NE 4TH ST/DUVALL AV NE Filed By TEl 10/10/88 Changed By TE1 04/26/89 DATE 10 04 98 DAY TUE PR HR 1600-1700 COUNT TIME 1500-1700 INIT RMH INTy 103 A/M/R P WEATHER CLOUDY SURFACE DRY NB: LEFT 17 THRU 2 RIGHT 10 TOTAL 27 %HV 6.9 PHF 0. 60 PEDS UN DIRCCI LUVMLL MV NE SB: LEFT 393 THRU 41 RIGHT 126 TOTAL 560 %HV 8.6 PHF 0.89 PEDS ON STREET DUVALL AV NE EB: LEFT 127 THRU 1086 RIGHT 50 TOTAL 1267 %HV 1. 1 PHF 0.88 PEDS ON STREET NE 4TH ST WE: LEFT 8 THRU 480 RIGHT 188 TOTAL 676 %HV 3.0 . PHF 0. 96 PEDS ON STREET NE 4TH ST Indexed By T1 DUVALL AV NE NE 4TH ST TMC 103P 88 • 'ENTER)Next (5) Remove (9)Change (12)Tag (13)Print (15) info (16)Exit Ctrl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject TMC043P 88 Title TMC88P NE SUNSET BL/UNION AV NE Filed By TE1 09/29/88 Changed By TE1 04/26/89 DATE 09 22 88 DAY THU PK HR 1600-1700 COUNT TIME 1500-1700 INIT RMH INT# 043 A/M/P P WEATHER SUNNY SURFACE DRY NB: LEFT 36 THRU 111 RIGHT 172 TOTAL 319 %HV 2.2 PHF 0.86 Ptijt, UN 8I Rtt 1 UN1UN AVE NE SE; LEFT 52 THRU 87 RIGHT 133 TOTAL 272 %HV 2. 6 PHF 0.93 PEDS ON STREET UNION AVE NE EP: LEFT 243 THRU 971 RIGHT 44 TOTAL 1258 %HV 1. 3 PHF 0.97 PEDS ON STREET NE SUNSET BLVD WB: LEFT 128 THRU 460 RIGHT 31 TOTAL 619 /HV 2.9 PHF 0.91 PEDS ON STREET NE SUNSET BLVD Indexed By Ti NE SUNSET BL TMC043P 88 UNION AV NE (ENTER)Next (5) Remove (9)Change ((12)Tag (13)Print (15) Info (16)Exit :trl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO • = Electronic Card File = ' Subject TMC043A 89 _ Title TMC89A NE SUNSET PL/UNION AV NE Filed By TE1 07/14/89 Changed By DATE 07 14 89 DAY FRI PK HR 0645-0745 COUNT TIME 01615-0800 INIT RMH INT# 043 a/M/P A WEATHER OVERCAST. SURFACE DRY _ NB: LEFT, 23 THRU 29 RIGHT 98 TOTAL 149 %HV 5. 0 PHF 0.85 PEDS i SIN STREET UNION AV I' SB: LEFTS 23 THRU 43 RIGHT 189 TOTAL 254 %HV 1.3 PHF 0.85 PEDS 1 ON STREET UNION AV NE EB: LEFT 19 THRU 208 RIGHT 11 TOTAL 238 %HV 5.4 PHF 0. 87 PEDS I ON STREET NE SUNSET BL WE: LEFT' 42 THRU 814 RIGHT 15 TOTAL 871 %HV 1.2 PHF 0.85 PEDS 0 j ON STREET NE SUNSET BL Indexed Pv Ti NE SUNSET BL SR 900 d T+IC043A 85. UNION AV NE ENTER)Net (5) Remove (9)Change (12)Tag (13)Print (15) info (16)Exit Ctri/A Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = Subject TMC043A 90 Title TMC90A NE SUNSET PL/UNION AV NE Filed By TE1 05/19/89 Changed By TE1 06/07/90 ' DATE 06 07 90 DAY THU PK HR 0700-0800 COUNT TIME 0615-0800 INIT RGC INT# 043,A/M/P A WEATHER CLOUDY SURFACE WET NB: LEFT 28 THRU 36 RIGHT 131 TOTAL 195 %HV 0.5 PHF 0.95 PEDS 1 ON STREET SE: LEFT 51 THRU 45 RIGHT 189 TOTAL 285 /HV 0. 0 PHF 0. 90 PEDS 0 ON STREET EP: LEFT 41 THRU 319 RIGHT 10 TOTAL 370 /HV 2.6 PHF 0.76 REDS 1 ON STREET WE: LEFT 69 THRU 1105 RIGHT 21 TOTAL 1195 /HV 0.5 PHF 0.70 PEDS 1 : ON STREET Indexed BY T1 NE SUNSET;' BL TMC043A 91 UNION AV NE (ENTER)Next (5) Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit Ctr1/A Options; ALT!Z Help; Ctrl/End Exit L N 2110ADEMO = Electronic Card File = 1 ' Subject T MCO72A 90 Title TMC90A NE 4TH ST/UNION AV NE Filed By TE1 05/19/89 Chanced By TEl 06/15/90 DATE 06 14 90 DAY THU PK HR k 6 45-0/45 COUNT TIME 0615-0800 MIT RGC INT# 072 R/M/P A WEATHER CLEAR SURFACE DRY NB; LEFT 175 THRU 57 RIGHT 78 TOTAL 318 %HV 0. 7 PHF 0. 80 REDS 2 ON STREET SB: LEFT 43 THRU 15 RIGHT 160 TOTAL 218 %HV 0. 0 PHF 0.88 PEDS 7 ON STREET EP: LEFT 61 THRU 264 RIGHT 31 TOTAL 356 %HV 1.5 PHF 0. 84 PEDS 1 ON STREET WE: LEFT 40 T:=HRUor� .,,70rGH �F< 54 TOTAL 1263 %HV 1. 1 PHF 0. 90 PEDS 3 ON1' STREET��,I ;;;�::1�+ rg'a.'fs��:.-o Indexed By NE 4TH ST TMC072R 90 UNION AV NE (ENTER)Next (5) Remove (9)Change (1 )Tag (13)Print (15) Info (16)Exit ;tr1/R Options; ALT/Z Help; Ctrl/End Exit L N 2110ADEM0 = Electronic Card File = Subject TMCO72P 88 Title TMC88P NE 4TH ST/UNION AV NE Filed By TE1 10/05/88 Changed By TE1 04/26/89 DATE 10 03 88 DAY MON PK HR 1515-1700 COUNT TIME 1545-1645 INIT RMH INT* 072 A/M/P P ' WEATHER CLOUDY SURFACE DRY NB: LEFT 81 THRU 80 RIGHT 80 TOTAL 241 HV 2. 9 PHF 0. 87 PEDS ON STREET UNION AV NE SR: LEFT 149 THRU 106 RIGHT 159 TOTAL 414 %HV 2. 4 PHF 0. 99 PEDS ON STREET UNION AV NE EB: LEFT 294 THRU 994 RIGHT 196 TOTAL 1484 %HV 1. 9 PHF 0. 93 PEDS ON STREET NE 4TH ST WB: LEFT 95 THRU 505 RIGHT 102 TOTAL 702 %HV 4.3 PHF 0. 86 REDS ON STREET NE 4TH ST Indexed By T1 NE 4TH ST TMC072P 88 UNION AV NE (ENTER)Next (5)Remove (9)Change (11)Prev (12)Tag (13)Print (15) Info (16)Exit 3trl/A Options; ALT/Z Help; Ctrl/End Exit L N 2110RDEMO q2-/5(0?SkAD PACIFIC 3025-112th Avenue N.E. P.O.Box C-97304 Bellevue,WA 98009-9304 PLANNING DIVISION CITY OF RENTON MEMORANDUM 0C 22 1992 Date: October 21, 1992 To: • Ron Deverman From: Brian L. Smith • MICROFILMED Re: Traffic Volumes for Forrest Creste I have located the traffic counts that were gathered from the Forrest Creste project. These counts were taken in 1989 and 1990 which was the most recent data available at the time that we began preparation of the traffic study. These volumes were projected using the rates stated in the traffic study through to the year of completion. The volumes with this document are at the following intersections: • NE 4th/Union • NE Sunset Blvd./Union Ave. NE • NE 4th St./Duvall Ave. NE • NE Sunset Blvd./Duvall NE • NE 3rd/Jefferson Ave. NE • NE Sunset Blvd/NE 12th St. • NE Sunset Blvd/NE 10th • NE Park/Sunset Blvd. NE • N 3rd St./Sunset Blvd. N • N Park Dr./I-405 SB On-Off • I-405 NB on Ramp/Park Ave. • I-405 NB Off Ramp/Park Ave. • 138th Ave. SE/SE 128th • SE 128th W/O 148th Ave. SE • 148th Ave. SE N/O SE 128th St. • SE 128th ST. E/O 148th Ave. SE • SE 128th St. W/O 142nd Ave. SE • SE 128th St. E/O 142nd Ave. SE • 142nd Ave. SE N/O SE 128th St. It is important to know that some of the volumes were hand adjusted for time of day and day of the week in order to obtain consistent volumes during the established peak hour. However, the magnitude of the traffic volumes from the report will be the same as those shown in these traffic counts. If you have any questions please contact me. (206)827-0220 Fax(206)822-5341 Planning•Engineering•Surveying•Landscape Design•Environmental Services CITY OF RENTON Planning/Building/Public Works Department Earl Clymer, Mayor Lynn Guttmann,Administrator September 14, 1992 • • SUBJECT: Forrest Creste Final Environmental Impact Statement ECF;SA-093-88 Dear Interested Party: This letter is notification that the Environmental Review Committee (ERC), designated as the SEPA responsible official for the City of Renton, issued the Final Environmental Impact Statement (FEIS) for the proposed Forest Creste residential development project on September 14, 1992. The proponent is applying for a rezone of an approximately 11.9 acres site from G-1 (General Use) to R-3 (Medium Density Multi-Family Use) and site plan approval for a 200 unit multi-family residential complex (including townhomes and traditional units). Development plans include preserved/enhanced wetland areas and on-site recreational amenities. The project is located on the east side of Duvall Avenue NE, north of NE 6th Street. The FEIS augments the Draft EIS by providing additional research and findings, publishing and answering letters received on the Draft, providing additional mitigation, and incorporating by reference a number of documents. This document may be viewed at the Renton Public Library, Main Branch, 200 Mill Avenue South, Renton, 98055. Additional copies of the Draft and Final Forrest Creste EIS are available at the third floor, Municipal Building, 200 Mill Avenue, Renton, WA 98055. The DEIS is available for $11.90 including tax and the FEIS is available for$16.23 including tax. The City of Renton will not take any official action on this project until the issuance of the Mitigation Document. The Mitigation Document will list the measures necessary to avoid significant adverse impacts on the environment. At the time this document is issued, the official appeal period on the adequacy of the Draft and Final EIS will begin. Under City of Renton Code 4-6-23, an appeal of the FEIS must be made to the Hearing Examiner, City of Renton, 200 Mill Ave S, Renton, Washington 98055, within twenty (20) days of the date the permit or other approval is issued. The approval, i.e., underlying governmental action, in this case, is the mitigation document. Sincerely yours, -(-Th...),91/ Donald K. Erickson, AICP Secretary to the ERC feisltr ?fin Mill Aven„e smith - Rentnn Wachinotnn 952n55 CITY OF RENTON NOTICE OF FEIS ISSUANCE AND AVAILABILITY Description of Agency Action: Environmental Review Committee „(ERC) issued the Final Environmental Impact Statement on September 14, 1992 on the proposed Forrest Creste residential development project. ERC will issue a mitigation measures document on the above project based on information from the DEIS and FEIS. Description of Proposal: The applicant is seeking a rezone of an approximately 11.9 acres site from G-1 (General Use) to R-3 (Medium Density Multi-Family Use) and site plan approval for a 200 unit multi-family residential complex (including townhomes and traditional units). Development plans include preserved/enhanced wetland areas and on-site recreational amenities. Location of Proposal: East side of Duvall Avenue N.E. north of N.E. 6th Street Type of SEPA Review: Issuance of Final EIS . Documents may be examined during regular business hours at Development Services, Third Floor, Municipal Building, 200 Mill Avenue South. LEAD AGENCY: City of Renton Department of Planning/Building/Public Works Development Planning Section APPEAL: Any appeal as to the adequacy of the Draft and Final Environmental Impact Statements, pursuant to WAC 197-11-68 must be consolidated with an appeal on the agency's decision on the proposed action. The mitigation document is this agency's decision which may be appealed together with the FEIS. These appeals may be filed with the Hearing Examiner, City of Renton, by 5:00 PM, 20 days after the issuance of the mitigation document. PUBLICATION DATE: September 14, 1992 DATE OF DECISION: September 9, 1992 SIGNATURES: ii /7 L n A. Guttmann, Administrator DATE epartment of Planning/Building/Public Works am Chastain, Administrator • DATE Community Service Department . --„,: .4)..., , ,,„a- . heeler 7- ?-- 77 ' .. , - Lee , Fire Chief DATE , Renton Fire Department feispub , , Forrest Creste (File # R-093-88,SA,ECF) MICROFILMED Application Submitted 09-20-88 Request for Additional Information 10-04-88 Application Formally Accepted 10-26-88 Technical Advisory Committee Review 11-16-88 Environmental Review Committee (ERC) Review 11-30-88 ERC Request for Traffic Impact Information 11-30-88 ERC Review 04-19-89 04-26-89 05-03-89 06-07-89 Determination of Non-Significance Mitigated 06-21-89 (DNSM) Issued by ERC ERC Upholds DNSM / Revision of Mitigation 08-30-89 ERC Review of Rezone 10-11-89 Hearing Examiner Hears Citizen Appeal . 10-17-89 Hearing Examiner Orders Environmental Impact 11-07-89 Statement (EIS) Determination of Significance (DS),Issued/ 01-29-90 Publication of Scoping Notice Correspondence Occurred 12/90-6/91 Preliminary Draft Environmental Impact 02-12-92 Statement (DEIS) Issued for Comments DEIS Issued 05-04-92 Public Meeting to Accept Oral and Written 05-21-92 Comments on DEIS Preliminary Final Environmental Impact 08-92 Statement (FEIS) Issued FEIS Issued 09-14-92 Mitigation Document Issued 09-22-92 CITY OF RENTON, WASHINGTON RESOLUTION NO. 2878 A RESOLUTION OF THE CITY OF RENTON, WASHINGTON, ESTABLISHING A PROCEDURE FOR PROCESSING OF LAND USE AMENDMENTS AND REZONE APPLICATIONS . WHEREAS, the City of Renton is presently engaged in the process of studying and readopting its Comprehensive Plan and other associated comprehensive plans; and WHEREAS, the present land use element of the Comprehensive Plan is outdated and in need of revision and an interim land use element is anticipated to be adopted in December, 1992; and WHEREAS, it is anticipated that the adoption of an updated interim land use element will be followed by changes to the Zoning Code and area-wide rezoning to make the zoning consistent with the land use element of the Comprehensive Plan; and WHEREAS, rezoning of parcels in anticipation of changes in the Comprehensive Plan could frustrate the intent and purpose of the changes to the Comprehensive Plan; and WHEREAS, it is advisable to have a process established to handle requests for land use plan amendments and zoning categories rather than imposing a moratorium. NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF RENTON, WASHINGTON, DO RESOLVE AS FOLLOWS : SECTION I . The above recitals are found to be true and correct in all respects . 1 RESOLUTION NO. 2878 SECTION II . Any proposed land use amendments or rezone requests received before July 31, 1992 will be accepted by the staff without a fee and presented to the Planning Commission for consideration and recommendation as part of the area-wide zoning process . Applications received after that date will be deferred for consideration after January 1, 1993, and a fee will be required. SECTION III . If an updated interim land use element has not been adopted by December 31 , 1992 , the Renton City Council will review this resolution for readoption or amendment in light of the then existing facts and equities . PASSED BY THE CITY COUNCIL this 27th day of January, 1992 . Marilyn (y'etersen, City Clerk APPROVED BY THE MAYOR this 27th day of January, 1992 . (1; EU\ Q"l� arl Clymer, M or Approved to form: Laws iceJ. Warr , City Attorney RES. 173 : 1-27-92 :as . 2 Comprehensive .elan • . Coordinating Commi 6 i 1/27/92 • COMPREHENSIVE PLAN LAND USE ELEMENT RECOMMENDED ADOPTION SCHEDULE 1. A recommendation on plan policies and a draft land use plan map will be submitted to the City Council in April, 1992. 2. By July, the City Council will review and select a final Interim Land Use Plan Alternative which will provide a "guideline" to the staff and Planning Commission for preparation of recommendations on proposed zoning code and areawide zoning map amendments. 3. Private property owners will be notified and encouraged to submit their requests for changes in Comprehensive Plan Land Use zoning designations to the Planning Division by July 31, and fees would be waived. 4. After July 31, 1992, all private applications for Comprehensive Plan Amendments and Rezones would be closed for a five-month period until the Interim Land Use Element is adopted by the City Council in December. .New applications, with fees, would be deferred to January, 1993, to be considered in the next annual cycle of Comprehensive Plan amendments. 5. A recommendation on the Interim Area-wide Zoning and Code amendments will be submitted to the City Council by the end of September, 1992. 6. The Interim Area-wide Zoning and Code amendments and Interim Land Use Alternative will then be considered simultaneously by the City Council for adoption in December, 1992. 7. The final Comprehensive Plan including Land Use, Transportation, Utilities, Housing and Capital Facilities will be adopted in July, 1993. IN i i RIM AREA-WIDE ZONING AND CODE AMENDMENTS (Required for consistency with proposed Interim Land Use Element - to be completed by December, 1992.) I. Interim Zoning Code Changes: A. Commercial Districts: • The B-1, Business Zone, would be rewritten to establish 3 or 4 commercial districts, i.e. Community, Neighborhood and City Center business districts. B. Industrial Districts: . The Light Industry (LI), Heavy Industry (HI) and Office Park (0-P) zones will be reviewed for consistency with the Plan. C. Residential Districts: The residential zones, including R-1, R-1.5, R-2 R-3, and R-4 will be reviewed for consistency with the Plan. D. Subdivision Code: .Consistency with Interim Land Use Plan, and general "housekeeping" amendments. E. Zoning Code- General "housekeeping" amendments. II. Interim Comprehensive Plan Land Use Map and Zoning Map Changes: A. City Initiated Map Amendments: All mapping changes required for consistency with changes in Land Use Designations created by the Plan, and new zoning districts. B. Privately Initiated Requests for Consideration of Map Amendments: Review of applications received by July 31, 1992, for consistency with Interim Land Use Plan and Area-wide Zoning, and preparation of recommendations related to the requests. i 1 CC = City Council COMPREHENSIVE PLAN SCHEDULE PC = Planning Commission STAFF = City Staff — CRITICAL MILESTONES -- 1992 I. . • JAN I FEB MAR APR' MAY ( JUNE JULY AUG SEPT OCT NOV DEC JAN FEB MAR 1APR1MAYJUNE Recommend Land Use I • Review Area wide inning Commission Policies/Map Zoning .and' Code Amendments I ( • Review and select ' Review and adopt Interim . ity Council • Land Use Alternative Land Use Element/Zoning/Code Amendments • • Caff Pf=epare plan re- Prepare Background Prepare draft amendments visions and 'MS. Research/ Accept and preliminary applications. • I maps. ( ') • Property Owners Citizens • > Public Hearings . Submit land use/rezone - Submit land use/rezone' • requests requests CITY OF RENTON, WASHINGTON RESOLUTION NO. 2911 A RESOLUTION OF THE CITY OF RENTON, WASHINGTON, AMENDING RESOLUTION NO. 2878 BY EXEMPTING CERTAIN APPLICATIONS FROM THAT RESOLUTION. WHEREAS, the City of Renton adopted Resolution No. 2878 which established a single process for rezones and comprehensive plan amendments until adoption of the new comprehensive plan; and WHEREAS, certain projects were well advanced in the review and permitting process such that the city had received materially complete applications and the projects had undergone SEPA review; and WHEREAS, including those advanced projects within Resolution No . 2878 would work a hardship on the projects; and WHEREAS, it would be equitable to exempt those projects from the projects to be handled under Resolution No. 2878 . NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF RENTON, WASHINGTON, DO RESOLVE AS FOLLOWS : SECTION I. The above recitals are found to be true and correct in all respects . SECTION II. Land use amendments or rezones for which complete applications were received and substantial progress has been made in processing the application, including SEPA review, prior to the adoption of Resolution No. 2878 on January 27 , 1992., will not be part of the area-wide zoning process under that Resolution but will proceed unaffected by that Resolution under the normal city scheduling process . A list of the projects to be 1 • y j RESOLUTION 2911 exempted is attached hereto and incorporated by reference herein as if fully set forth. SECTION III. This resolution does not amount to a commitment to zoning under the present Comprehensive Plan nor does it create any vesting of rights to the applicants . SECTION IV. Upon adoption of the new Comprehensive Plan, any project that has been rezoned but does not have a materially complete building permit application will be required to comply with all existing development regulations as of the time of the building permit application. SECTION V. Upon adoption of the new Comprehensive Plan, any proposed rezone that has had a public hearing but has not been formally rezoned must become a contract rezone and may be required to comply with the new regulations . PASSED BY THE CITY COUNCIL this 6th day. of July , 1992 . 2') ('Marilyn P tersen, City Clerk APPROVED BY THE MAYOR this ay of July , 1992 . Ea Clyme , yor Approves to form: Lawrence J. War n, City Attorney RES . 206 :4/18/92 :as . 2 EXHIBIT B Pipeline Projects To be Exempted from Resolution 2878 May 4, 1992 1. Book Bales Rezone (110-91} 1726 Duvall Rezone from G-1 to R-2 with Conditional Use STATUS: Scheduled for Hearing Examiner on April 14, 1992. 2. Tall Firs Townhomes- (056-91) 4808 NE Sunset Blvd. 37 Townhomes Rezone from G-1 to R-2 STATUS: Scheduled for. the Hearing Examiner on April 14, 1992. 3. The Orchards (138-90) NE 8th and Duvall Ave. NE. 275 Multi-family units, 121 single family lots, 68 townhomes, 28,000 s.f. of commercial/office Contract rezone to R-3 STATUS: Scheduled for the Hearing Examiner on April 7, 1992 for Site Plan approval. 4. dale Apartments {08 see #4 of 4100 of Linco modifications 198 units o - anvil on committee Rezone -1 t - report. ST : Approved by earing Examiner; Council put on hold ( nditioned on Fire Benefit ). 5. Malesis Rezone and Short Plat (050-90) 2202 Smithers Ave. So. Single family residential Rezone from G-1 to R-1 STATUS: Approved by Hearing Examiner; approval expires 9/18/92. The Bluffs, east of L. Wash Blvd., west of 1-405 167 units multi-family Rezone from R-1 to R-3 STATUS: EIS completed; project not expected to proceed. 7. Bakke, Inc. (107-88) N.E. 4th and Union Ave. SE 111 multi-family units Rezone from G-1 to R-3 and B-1 STATUS: Aporoval will expire in April; have requested two-year extension from Hearing Examiner. 8. Forest Creste (093-88)- Duvall and SE 124th 200 multi-family units Rezone from G-1 to R-3 STATUS: DEIS will be completed within month. 9. $odi Thompson (045-88) 1222/1224 Kirkland Ave NE D Q5`"? • $. 1 Rezone from R-2 to R-3 STATUS: Hearing Examiner recommended approval with restrictive covenants. 10. Sunset Gardens II/Crystal Heights (073-91) Rezone STATUS: (See attached letter from applicant). . �r 1• -r-= Sound • Planning ..! Carp01 citron 10717 NE Fourth Street Bellevue,WA 98004 Fax:206/646-9694 206/455-1822 ;�. ••i �i?fin 1 ^I ;N • April 13 , 1992 • AFR ' 0 1992 •./:: .:.ice�•• , .=:''•. Mrs Kay Shoudy . Manager Planning & Technical Services Department of Planning, Building and Public Works City of Renton 200 Mill Avenue South Renton, Washington 98055 • RE_. CRYSTAL HEIGHTS/R-SA-073-91 EXEMPTION FROM RESOLUTION 2878 Dear Mrs . Shoudy: • Thank you for taking a moment on Wednesday, April 8th, to discuss the impact of the implementation of Resolution 2878 on. my client . I understand that you are. requesting that the City Council specifically exempt certain land use applications that were in the planning process prior to January 1 , 1992 . My client , Cliff Mull , approached me back in June 1991 to prepare the rezone application for a multiple family project on the west side of Sunset Boulevard N . E . . His project • ' known as "Crystal Heights" was submitted in October and assigned a file number of R-SA-073-91 . At our preliminary review, Mr. Don Erickson, requested that because of the geographic location, shape, size, topography, and history of neighborhood development that we attempt to enlarge the project to include the adjacent property owners . Over the last 6 months we have been proceeding and have expended over $35 , 000 . 00 in funds in following the request by staff . My client ' s reflect specific site and building design details that were required as part of the site plan submission. Presently, he is expending another $4 , 000 . 00 for the conceptual storm water drainage plans . Since our time schedule would call for construction and occupancy by the summer of 1993, we would request that we be included your request for as an exemption to Resolution 2878 . Sincerely, Roger J . aylock '�' �`��-� • ' annirt �Buil�� g/Public Works.Department � Pl g/ Lynn Guttmann, Administrator Earl Clymcr, Mayor . PLANNING DIVISION ' CIiYOF�ENiON April 13, 1992 APR 1 31992 RECEIVE.' Roger Blaylock 10717 NE 4th Street, Suite 9 Bellevue, Washington 98004 Re: Your June 27, 1 991 Application for Rezone and Site Plan Approval Crystal Heights Apartment Project--File #R-SA-ECF-073-91 Dear Mr. Blaylock: i , This letter is sent to formally advise you that we need additional information nformaion in order to further process the above-referenced Rezone/Site Plan Approval application. lastyear we requested additional information (i.e. storm drainage plan and report) In July of application. When we returned and recommended several revisions to the above-referenced the package to you, you indicated that revisions would be returned within a few weeks. To date, we have not yet received these revisions or the additional information we requested. Since it has been several months since your original application was submitted to us, we will need to return your application fees (80%) and close out the file if we do not receive a complete application package by May 13, 1992. As you know, we are presently working on a Comprehensive Land Use Plan update land the City Council has revised. the rezone process for this year's applications. If your app on is closed out, you will have to re-apply through the Planning and Technical Services Division (Long Range Planning) and await the final disposition of the Land Use Plan and associated ' . zone changes. I h ave enclosed the current City of Renton "Rezone" and "Site Plan Approval Submittal • ets me any Requirements". Please review information that instruction sh wee requirein order oto expeditew if you aeview of ' questions about the additionalapplication package. I can be reached at 235-2550. your Rezone/Site Plan Approval app Sincerely, C Laureen Nicolay / ' Associate Planner C.. • enclosures cc: Don Erickson Kay Shoudy. • 200 Mill Avenue South - Renton_ Washington 98055' Draft Forrest Creste Environmental Impact Statement April 1992 MICROFILMED City of Renton, Washington Planning/Building/Public Works Department 4%. '_� CITY OF RENT ON Planning/Building/Public Works Department Lynn Guttmann,Administrator Earl Clymer, Mayor • • May 1, 1992 SUBJECT: Draft Environmental Impact Statement for Forrest Creste/ECF;R;SA-093-88 To Whom It May Concern: Transmitted herewith is a copy of the Draft Environmental Impact Statement for the Forrest Creste Development. The project site is located on the eastside of Duvall Avenue NE, north of NE 6th Street (if extended). PROPOSAL: A rezone of an approximately 1 1.9 acre site from G-1 to R-3 and site plan approval for a 200 v multi-familycans ncllex ude(on-site nactove recreational amenities traditional and preserved enhanced wetland areas.acre. Developmentp The DEIS identifies a variety of impacts. Preliminary mitigation measures are suggested to address these identified impacts.• The document is available at the Development Services Division, Third Floor, Renton Municipal Building, 200 Mill Avenue South, Renton Washington 98055. s this — Information in the document he intent ofsed by the StateEnCity ronmental Policy Act informed (SEPA). Writtennpublic comment proposal, consistent w June 4, on the -DEISday is encouraged u period, esponses e accepted oomments 30-daywill review eparedd,anddi incorporated in in2a Final the 30-day review Environmental Impact Report (FEIS). Written comments should be addressed to: Donald K. Erickson, AICP Secretary to the ERC Planning/Building/Public Works Department ATTN: Lenora Blauman 200 Mill Ave S Renton, WA 98055 A public hearing to accept written and oral comments on the DEIS will be held in the Renton City Council Chambers on May 21, 1992 at 7:00 p.m., 200 Mill Avenue South, Renton Washington. Please call 235- 2550 for additional information. • For the Environmental Review Committee, I � Donald K. Erickson, AICP Secretary dcovlV 100 Mill Avenue South - Renton. Washington 98055 I� I I v DRAFT ENVIRONMENTAL IMPACT STATEMENT FOR THE PROPOSED FORREST CRESTE PROJECT City of Renton Planning/Building/Public Works Department Renton, Washington Prepared for Review and Comment in Compliance with The State Environmental Policy Act of 1971 as Amended in the Revised Code of Washington 43.21.0 and the Renton Environmental Ordinance # 4260 (City of Renton) 1 1 , FACT SHEET Project Title Forrest Creste Proposed Action The Proposed Action includes two distinct components: a rezone from G-1 use (general purpose) to R-3 use (medium density, , multi-family) and site plan approval. The proposed site plan is for the construction of a 200-unit multi-family apartment complex known as Forrest Creste. The development is proposed by Ray LaBlanc. Project Location The proposed Forrest Creste site is located on approximately f 11.9 acres, in the City of Renton, east of Duvall Avenue NE, north of NE 6th Street (if extended) and south of the Park Terrace subdivision. Action Sponsor City of Renton Planning/Building/Public Works Department - Municipal Building 200 Mill Avenue South Renton, Washington 98005 Implementation Date Fall 1992 (Tentative) Lead Agency City of Renton, Washington Responsible Official Donald K. Erickson, Zoning Administer Planning/Building/Public Works Department Municipal Building, 3rd Floor 200 Mill Avenue South Renton, Washington 98055 (206) 235-2550 I Contact Person Lenora Blauman, Senior Planner Planning/Building/Public Works Department Municipal Building, 3rd Floor 200 Mill Avenue South Renton, Washington 98055 (206) 235-2550 Approvals or Permits Required Site plan approval, building permit, street construction and related utility permits, such as electrical and storm sewer permits. Principal Contributors W&H Pacific, Inc. (Primary Author, Wetlands Delineation, Traffic) 3025 112th Avenue NE P.O. Box C-97304 Bellevue, Washington 98009-9304 Terra Associates, Inc. (Geology) 12525 Willows Road, Suite 101 Kirkland, Washington 98034 David W. Browne Engineering (Drainage) 105 Wyatt Way N, Suite D Winslow, Washington 98110 Issue Date for Draft EIS May 4, 1992 Comments Due on Draft EIS June 4, 1992 Cost of Document $11.00 ,fir, TABLE OF CONTENTS Page FACT SHEET i TABLE OF CONTENTS i LIST OF FIGURES iii LIST OF TABLES iv, CHAPTER 1 - SUMMARY 1 1.1 INTRODUCTION 1 1.2 PROJECT DESCRIPTION 1 1.3 PROJECT HISTORY 1 1.4 ALTERNATIVES INCLUDING PROPOSED ACTION 3 Proposed Action- Site Plan A 3 Alternative 1 - Site Plan B 4 Alternative 2 - No Action 4 1.5 AREAS OF ENVIRONMENTAL SIGNIFICANCE 4 1.6 PUBLIC INVOLVEMENT 15 CHAPTER 2 - ALTERNATIVES INCLUDING PROPOSED ACTION 17 2.1 INTRODUCTION 17 2.2 EIS ALTERNATIVES 17 Proposed Action- Site Plan A 17 Alternative 1 - Site Plan B 19 Alternative 2 - No Action 19 CHAPTER 3 - AFFECTED ENVIRONMENT, SIGNIFICANT ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES 21 3.1 EARTH 21 3.2 AIR 25 3.3 WATER 27 3.4 PLANTS 38 3.5 ANIMALS 42 i tJ 3.6 NOISE 44 3.7 LAND USE 46 3.8 AESTHETICS 59 3.9 LIGHT AND GLARE 61 3.10 PARKS AND RECREATION 63 3.11 TRANSPORTATION 66 3.12 PUBLIC SERVICES 75 3.12.1 POLICE 75 3.12.2 FIRE 78 l 3.12.3 SCHOOLS 80 3.13 UTILITIES 82 4y 3.13.1 SANITARY SEWER 82 3.13.2 PUBLIC WATER SUPPLY 85 3.13.3 OTHER UTILITIES 87 4 REFERENCES 90 APPENDICES: APPENDIX A: LEGAL DESCRIPTION -FORREST CRESTE APPENDIX B: GEOTECHNICAL STUDY APPENDIX C: WETLANDS DETERMINATION REPORT FOR FORREST CRESTE APPENDIX D: DISTRIBUTION LIST FOR DRAFT EIS APPENDIX E: RESULTS OF PUBLIC SCOPING MEETING APPENDIX F: HYDROLOGIC ANALYSIS L' APPENDIX G: LAND USE ANALYSIS 1 APPENDIX H: TRANSPORTATION SUPPORT DOCUMENT AND SUPPLEMENTAL FORREST CRESTE TRAFFIC IMPACT ANALYSIS SUPPORT DOCUMENT 1: 1993 No-Build Signalized Intersection LOS SUPPORT DOCUMENT 2: 1993 No-Build, 1992 Orchards and Forrest Creste Completion Signalized Intersection Analysis SUPPORT DOCUMENT 3: Sample Mitigation for Affected Intersections i ii LIST OF FIGURES Figure 1 - Vicinity Map 2 Figure 2 - Proposed Action 18 Figure 3 - Alternative 1 - Site Plan B 20 Figure 4 - Site Topography Map 22 Figure 5 - Off-Site Water Bodies 28 Figure 6 - Off-Site Drainage 31 Figure 7 - Vegetation Diversity/Palustrine Woodland 39 Figure 8 - Designated Land Use/Comprehensive Plan 48 Figure 9 - Existing Zoning Map 53 Figure 10 - Renton Annexation Map 54 Figure 11 - Community Facilities Map 64 Figure 12 - Major Roadways 68 Figure 13 - Existing and Proposed Sanitary Sewer System 84 Figure 14 - Existing and Proposed Public Water System 86 LIST OF TABLES TABLE 1 - Selected Major Roadways In Study Area 67 TABLE 2 - Affected Intersections 70 TABLE 3 -Projected 1993 ADT on Major Roadways, With Project 71 TABLE 4 -Planned Improvements and Estimate of Cost 73 TABLE 5 - Officers Per 1,000 Population 76 TABLE 6 - Student Population 1987-88 to 1991-92 80 TABLE 7 - Distribution of Students 81 k a , • • iv . Chapter 1 Summary CHAPTER 1 - SUMMARY 1.1 INTRODUCTION This Draft Environmental Impact Statement(DEIS)analyzes the potential environmental impacts to the subject site and surrounding community that would be associated with the Proposed Action and each of the two alternatives. This chapter summarizes the Proposed Action, its alternatives, and their environmental impacts and mitigation measures. This chapter also discusses the project history and public involvement process for the Forrest Creste proposal. Chapter 2 describes in i ! more detail the alternatives including the Proposed Action. Chapter 3 identifies all environmental impacts, mitigation measures and any unavoidable adverse impacts that may occur as a result of the development. The proponent's objective is to provide a medium-scale, multi- _, family residential housing development to serve the population growth in the city of Renton. The proposed development would provide housing near employment centers, service and commercial areas and major transportation corridors. 1.2 PROJECT DESCRIPTION The Proposed Action is the development of a 200-unit multi-family residential complex on approximately 11.9 acres (approximately 17 dwelling units per acre), located in the City of Renton, east of Duvall Avenue NE, north of NE 6th Street (if extended) and south of the Park Terrace subdivision (see Figure 1). The complex, known as Forrest Creste, is being proposed by Ray LaBlanc. Townhouse units are proposed along the northern edge of the site with more traditional apartment units to be constructed on the remainder of the property. A recreation building, swimming pool, and sports court are planned for the middle of the complex. Two children's play areas are proposed east and southeast of this center. Parking for 350 cars is proposed. Also, a landscaped buffer, ranging from approximately 20 to 40 feet, is planned for the perimeter of the property. Approximately .61 acres of wetland would be preserved and protected by a 100-foot buffer. A small (0.03-acre) wetland in the northwest corner of the site would be protected by a 40-foot buffer. The proposed project would also include a trail system throughout the site that would integrate the residential units with planned recreational uses. Native vegetation would be retained around these trails as much as possible. Primary access to the proposed development would be from Duvall Avenue NE. Emergency access is proposed from 140th Avenue SE. A 30-foot right-of-way road dedication for the proposed NE 6th Street would be allocated along the southern edge of the site. 1.3 PROJECT HISTORY 'y } In September 1988, a Forrest Creste proposal was submitted to the City of Renton for a land use rezone and site plan approval by the original proponent, Dominion Developments, Inc. The i 1 MrL c9 F co �� 405 KING COUNTY F�- i ' RENTON CITY LIMITS I7. rijr .w ui z w L.. a o oNF5��6�J9 \. , N.E. 12TH ST. S P �JNE PACK DR. 11 O —_I m . N.E. 10TH ~ W 4 ST. ui J= z Z p c") N.E. u1 ui > LLi 7TH ¢ Z a a ST - w u, 0 a lecj z_ Z ;,r,R �-� S.E.122ND ST. it cc w iiiii::il '' — J "" PROPOSED = W I ;cc, /I T 0 ? N.E. 4TH ST. I p � �, S.E. 128TH ST. 2 2 SA m Er:rfol ui , I )040 ui aa> k CO T 14 (. 1- yW'Y SR-169 Forrest Creste Vicinity Renton, Washington Map ' : I PACIFIC frN Not to Scale N 2 Figure 1 i� Environmental Review Committee (ERC) for the City of Renton reviewed the proposal and SEPA checklist in November 1988 and requested that a traffic study be completed to address the potential transportation impacts of the proposal. In June 1989, the ERC issued a Determination of Non-Significance with Mitigation (MDNS) to address impacts on the environment from the proposed development. An Environmental Impact Statement (EIS) was not deemed to be required. However, the ERC's decision was appealed by local residents who believed the proposal would have significant impacts on the environment and the surrounding neighborhoods despite proposed mitigation. During an appeal hearing in October 1989, other environmental issues were identified by residents as having probable significant impacts. In November 1989, as a result of the appeal process, the City of Renton Hearing Examiner found sufficient evidence of potential impacts to the environment and directed the City to have an EIS prepared for the Forrest Creste proposal. Under SEPA(WAC 197-11-360),any proposal judged to have the potential of significant adverse impacts should be carefully studied for its effect on the natural and built environment before any further decisions are made on the proposal. In January 1990, The ERC issued a Determination of Significance(DS) and requested public and agency comments on the range of environmental issues that should be addressed in the EIS. Project scoping and the EIS process began in Spring 1990. A formal scoping meeting for the Forrest Creste proposal was held in June 1990. In August, 1990, the original proponent, Dominion Developments, Inc., withdrew from the proposed project. The new proponent, Ray LaBlanc, is carrying the project forward with some revisions to the original proposal. 1.4 ALTERNATIVES INCLUDING PROPOSED ACTION Proposed Action - Site Plan A The Proposed Action for Forrest Creste includes two distinct components: a rezone from G-1 use (General Purpose) to R-3 use (medium density, multi-family)and site plan approval. The Proposed Action includes the development of a 200-unit multi-family residential complex on approximately 11.9 acres (approximately 17 dwelling units per acre), located in the city of Renton. The proposal includes 24 two-story townhouses grouped in units of four or six along the northern edge of the site. The remaining 176 units and associated parking would be housed in 15 three-story apartment buildings on the rest of the property (see Figure 2). r_r Recreation facilities would include a clubhouse, swimming pool, and sports court. Two children's play areas would also be provided. The .61-acre wetland,in the southwest corner of the site would be protected by an 80- to 100-foot setback buffer and the .03-acre wetland in the northwest corner would be protected by a 40-foot buffer. Primary access to the site is planned from Duvall Avenue NE. A 30-foot dedication for the proposed extension of NE 6th Street is planned along the southern portion of the property for additional access. Access for emergency vehicles only will be provided from 140th Avenue SE. 3 Alternative 1 - Site Plan B This document also evaluates an alternative site plan (Site Plan B). The density proposed under this alternative would be the same as the Proposed Action, i.e., 200 units. The layout of the 24 townhouse units on the northern edge of the property would be altered (see Figure 3). A large open space would remain in native vegetation in the southwestern section of the site with appropriate buffers for the wetland in this corner of the property. The configuration of the 15 apartment buildings would be altered but the design of the buildings would remain the same. A recreation center, pool and sports court would be clustered in the northern portion of the site. Access to the proposed site would be from Duvall Avenue NE with emergency access from SE 140th. The 30-foot dedication for access from the proposed NE 6th Street would remain the same. Alternative 2 - No Action Under the No Action Alternative, the proposed multi-family development would not be constructed at the site. The property would remain in its natural state. Zoning would remain G-1 since no other development proposals are pending for this property. This zoning would allow subdivision development of single-family housing at one-acre densities or other semi-rural uses. Should subdivision and single-family homes be proposed on the property, platting and site plan,approval for five or more homes would be subject to SEPA review. In addition, the City of Renton would require a drainage plan, clearing and grading permits, and building permits normally associated with development. 1.5 AREAS OF ENVIRONMENTAL SIGNIFICANCE This section summarizes the significant environmental impacts that would likely result from development of the Forrest Creste site. This section addresses the impacts for the Proposed Action, one other build alternative, and the No Action Alternative. It also summarizes mitigation measures that would reduce the identified impacts.The'EI_S addresses other notable but less significant impacts to the natural and built environment. These issues were identified during the scoping process. Chapter 3 discusses each of the issues that,follow in detail. j~! EARTH Impacts • Development would result in earth-moving activities on the site. Excavation and clearing would be required for building foundations, driveways, utility trenches, and road beds. - There would be increased soil compaction and increased potential for soil erosion. • P 4. Mitigating Measures • An erosion control plan would be implemented prior to and during earth-moving activity. • Clearing and grading of the site would be limited to the months of March through October. • Site preparation would follow the recommendations included in the geotechnical study included as Appendix B. • Wetlands and their buffers would be protected by flagging construction limits to ensure that heavy construction equipment would not enter the setback zone. Unavoidable Adverse Impacts • Grading operations and vegetation removal necessary for urban development would alter the existing ground surface on the site. Some potential for erosion would be created during the construction phase. AIR Impacts • The projected 1,235 vehicle trips per day would increase carbon monoxide levels as well as other auto-generated emissions. • Fireplaces and/or wood stoves would contribute smoke and particulates to the air. • There would be short-term, localized increase in pollution during the construction phase of the project. Mitigating Measures • Road improvements suggested in Section 3.12 Transportation would help to minimize congestion internally, which would lower emission rates. • Construction techniques, such as watering of cleared and excavated areas, would minimize the dust raised by earth-moving activities during clearing and construction phases of the project. • Electricity and natural gas would be installed as primary heating sources in the proposed housing units. • The proposed project could be designed without wood stoves and/or fireplaces. 5 Unavoidable Adverse Impacts • !Wood stoves and fireplaces would contribute particulate emissions to the surrounding environment. Combined with other sources of particulate emissions they could contribute ;.to levels which would exceed the 24-hour standards and lead to the region-wide burn ban being enforced. WATER Impacts • !The project would convert approximately 41 percent of the property to impervious surfaces including roads, roofs and driveways. • !Replacement of natural surfaces with impervious ones would result in increased rates and ;,volumes of surface water. Additional runoff would increase the potential for erosion, ;particularly during construction when clearing and grading would occur. • 1,Conversion from an undeveloped wooded area to an urban neighborhood would result in an jincrease in urban pollutants including: heavy metals, oil and grease, sediment, nutrients, 'pesticides, and other toxic materials. Mitigating Measures • To mitigate potential erosion and sediment impacts,. Renton requires that an Erosion/Sedimentation Control Plan be provided to prevent sediment-laden runoff from ;leaving the site during construction. These measures would include the use of filter fences ;and straw bales, among others. • Since Forrest Creste is located within an Aquifer Protection Zone, it would be subject to the provisions of the pending Aquifer Protection Ordinance. • Biofiltration swales would most likely be required to assure water quality protection. • 'A storm drainage system would be designed to meet standards set by the City of Renton. • The stormwater drainage plan would prevent excess runoff from leaving the site. Natural and engineered detention and filtration systems would be used. • Wetlands would not be disturbed during grading activities and buffer areas would help reduce impacts. An additional 50 foot buffer will be retained around the wetland during most of the construction activity in order to mitigate for any increased impacts from the construction activity itself. 6 Unavoidable Adverse Impacts • Development of impervious surfaces would increase the total volume of runoff from the property.. Mitigating measures would reduce off-site flows to levels acceptable to the city and reduce the amount of urban pollutants in the stormwater discharged from the site. As with all development, runoff would still contain some level of pollutants such as fertilizer residues, some heavy metals and some oil and grease which is greater than existing undeveloped conditions and may have cumulative downstream impacts. PLANTS AND ANIMALS • Impacts • • Clearing and grading associated with the Proposed Action would necessitate removal or damage to 10.9 acres of the vegetation that currently provides habitat for small mammals and birds. _ • Human activity and the introduction of domestic animals tend to drive away indigenous wildlife. Displaced wildlife would likely perish. Mitigating Measures • Approximately 1.0 acres of permanent open space would be retained. • The wetlands and their buffer zones would remain undisturbed, providing some continued habitat. • Site landscaping would be provided to augment vegetation not removed during clearing and grading activities. Unavoidable Adverse Impacts • Loss of forest habitat on approximately 10.9 acres. • Decrease in the number of plant and animal species and change in the species composition as a result of the introduction of non-native plants and animals as well as human activities. • Possible elimination of wildlife species. NOISE Impacts • Increased noise levels would result from increased traffic volumes and construction equipment at the site. 7 • Increased human activity (use of power equipment such as lawn mowers and chain saws) ' would increase noise in the area. Mitigating Measures • :Construction equipment would be well maintained and properly muffled. • Construction hours would be limited to coincide with the normal working day (7 a.m. to '7 p.m.). • Nearby residents would be notified whenever extremely noisy work would occur. • (Noise levels inside the newly constructed homes would be reduced by location, design, and use of adequate setbacks for buildings, use of insulation, airtight exteriors, and thicker walls, :windows, and ceilings. • (Recreation facilities, service areas, parking areas, and children's play lots would be located (near the center of the site to reduce noise impacts on adjacent neighbors. • Acoustically designed fencing could be installed around the site to reduce noises. Unavoidable Adverse Impacts . N • ,There would be an increase in noise levels on site which would be primarily related to motor tvehicles. LAND USE Impacts • The neighborhood would be changed from semi-rural to urban. • The increased density (approximately 17 dwelling units per acre) that would accompany the Proposed Action would result in increased levels of human activity, noise and movement within the neighborhood. Mitigating Measures • Townhouse units located on the northern edge of the property would provide a degree separation between adjacent single-family homes to the north and apartment units to the south. They would be oriented in such a way so as not to be obvious from single-family homes to the north. • A wider area of natural vegetation could be provided to act as a visual screen and greenbelt between the proposed units and existing single-family homes to the north and east. A wider 8 L_ landscape buffer could provide a better transition zone for adjacent single-family uses and a more attractive environment for on-site residents. • Bulk and scale of buildings could be reduced by construction of smaller buildings or other reductions of density. Or conversely, larger buildings could be more tightly clustered and LI moved further to the south to provide greater distance between more intensive land uses and single-family uses to the north and east of the site. • In order to comply with GMA, Renton would establish municipal service standards for existing population and require mitigation fees for services directly impacted by population growth: Unavoidable Adverse Impacts • Any construction on the site for urban uses would result in some permanent loss of existing open space and natural vegetation. • The site would be permanently transformed from an undisturbed natural area to an urban neighborhood. AESTHETICS Impacts • The visual character of the site would be urban residential rather than natural woodland, although some natural vegetation would remain in the wetland areas, perimeter buffers and trail corridors. Mitigating Measures • To the degree possible, natural vegetation would be retained and dispersed throughout the site, especially within the trail corridors. • Natural vegetation would be maintained and augmented with supplemental plantings in perimeter buffer zones ranging from 10 to over 100 feet wide to visually screen more r-- intensive development on site from adjoining uses. • Buildings and landscape buffers would be oriented to screen views of large buildings from single-family homes. _ • Height, scale and bulk of buildings could be minimized to be more consistent with surrounding low-density development. Or conversely, larger buildings could be more tightly clustered and moved further to the south to provide greater distance between more intensive land uses and single-family uses to the north and east of the site. a-� 9 • Building materials and exterior colors that would visually minimize the bulk and scale of buildings could be used. Unavoidable Adverse Impacts • The site would change from a woodland environment to urban residential as development occurs. LIGHT AND GLARE Impacts • Development of the site would introduce artificial lighting from streets, buildings, and parking areas. • Illumination from vehicles moving through Forrest Creste at night would be discernable off-site. • There is the potential for glare from the multi-family units if they are painted light colors d are not effectively screened with vegetation. Mitigating Measures • Buffer zones of natural vegetation between the site and adjacent properties and roadways -. would reduce light impacts. • The design, location, and type of lighting would be such that the range of illumination and glare would be reduced while maintaining desired light levels. • All streets and parking areas would use low-level, non-glare lighting. Unavoidable Adverse Impacts • New sources of light and glare from the proposed development would be introduced to the east of Duvall Avenue NE as a result of vehicles and human activity. PARKS AND RECREATION Impacts • Increased population from Forrest Creste and other proposed developments in the immediate area, would result in the need for additional park space and recreational facilities. • Under the No Action Alternative, if the site were to remain undeveloped, it could be a potential park site. 10 I ' Mitigating Measures • The Forrest Creste proposal includes construction of a pool, recreation building, sports court and two children's play areas on site to reduce the impacts to public facilities. r--, • The developer would contribute impact fees of$175.00 - $180.00 per apartment to mitigate for park land acquisition necessary to accommodate new residents. • Property managers at the developed site could provide organized recreation programs. Unavoidable Adverse Impacts • None are anticipated. TRANSPORTATION Impacts • Traffic volumes would increase by five percent or more at five signalized intersections due to the Forrest Creste proposal. • The proposal would generate approximately 1,235 daily, 104 a.m. peak and 137 p.m. peak trips. • One intersection at NE 4th Street/Union Avenue NE would require mitigation. Mitigating Measures • Renton made previous recommendations to mitigate traffic impacts including: Eliminating the northernmost driveway to Duvall Avenue NE. Providing additional right-of-way on 140th Avenue NE. Providing a second access on NE 6th Street (SE 124th Street extended). Constructing the roadway to half-width from Duvall Avenue NE to the end. Providing additional eight feet of right-of-way on Duvall Avenue NE and installing a left turn lane. Providing an additional emergency access in the northeast corner of the site. • The signal timing could be revised at NE 4th Street/Duvall Avenue NE, NE 4th Street/Union Avenue NE, NE 4th Street/Monroe Avenue NE, NE 3rd Street/Jefferson Avenue NE and NE Sunset Boulevard/Duvall Avenue NE. These intersections would also be monitored to provide improved traffic signal operations. • Since the Forrest Creste site affects traffic in the East Renton Transportation Benefit Zone, the applicant would contribute approximately $153,000 to help fund proposed roadway improvements in the area. 11 • Adequate on-site circulation facilities for handicapped users including parking spaces, ramps, and turn-outs would be provided at appropriate locations. • ,A school bus stop near the Orchards or Forrest Creste properties would be installed. • Traffic signal timing at signalized intersections would be an ongoing process. • ;On-site circulation amenities, such as sidewalks or pathways, would be provided to aid pedestrian circulation, especially school children. • The applicant would notify METRO of their proposals so that bus service could accom- I,modate the development and the potential for constructing a bus shelter near the site could , 'be considered. Unavoidable Adverse Impacts • Forrest Creste and other proposed developments in the study area would add traffic to the pexisting street system. I , PUBLIC SERVICES Impacts Police • Upon completion and full build-out, the Forrest Creste proposal could generate an additional 278 calls for service per year. • Other proposed developments in the surrounding area would also require police services and the cumulative demand could impact the Police Department. Fire • Upon completion and full build-out, the Forrest Creste proposal could generate an additional I 20 calls for service per year. Schools • -Upon completion and full occupancy, the Forrest Creste proposal could generate an additional 81 students. • Other proposed developments would also generate students and the cumulative effects could impact the District, particularly at the elementary school level (grades K-6). 12 - -, I - ` Mitigating Measures Police • The Forrest Creste proposal would pay a one-time Police Department fee of$10,200 to be collected upon issuance of the Certificate of Occupancy. • The Forrest Creste design would incorporate crime prevention measures such as fences and vegetation around property boundaries locks and security systems on housing units, lighting for parking lots and buildings, and organized neighborhood block-watch programs. Fire • • The Forrest Creste design would incorporate fire prevention measures such as smoke detectors and sprinklers in all apartment units, fire hydrants throughout the site and access to the site via paved, public streets constructed to allow easy access for emergency vehicles. • Access for emergency vehicles only would be provided at 140th Avenue SE. I • In general, the construction characteristics of the proposed development would tend to reduce the occurrences of fire on the site as compared with developments built in the past when construction codes were less sensitive to fire safety. • In cases of cumulative emergencies where the City's firefighting resources were exceeded, a mutual aid system with surrounding fire districts from King County, Tukwila and Kent would be called on. Schools • The District could purchase, lease and/or construct portable classrooms, to accommodate enrollment increases. This option provides the maximum flexibility to respond to shifts in the number of students at different grade levels. Unavoidable Adverse Impacts Police • None are anticipated. Fire • None are anticipated. 13 Schools • The most significant impacts resulting from the proposal would be at the elementary school level. The School District currently does not have a mitigation strategy to fully mitigate these impacts. ' UTILITIES Impacts Sanitary Sewer • The current sewer capacity in the study area is not adequate to serve the Forrest Creste proposal. Interim sewer improvements are planned as a temporary solution until additional sewer capacity is in place. Public Water Supply • City Water Department personnel have indicated that the impacts from the proposal would be minimal. The area of greatest concern is that adequate fire flows be, supplied to the proposed development. Other Utilities • According to Puget Power personnel, adequate capacity exists to serve the proposed development and other developments likely to be constructed in the area. • U.S. West Communications would be able to adequately serve the proposed site. • Washington Natural Gas would be able to supply service to the proposed site; however, the existing mains would have to be extended. Mitigating Measures Sanitary Sewer • Forrest Creste would share the costs of constructing interim sewer improvements with other developers and would be required to obtain a limited exemption from the existing sewer moratorium. • ,The applicant would connect to and pay a proportionate share of constructing the new interceptor which would provide a permanent solution to wastewater disposal in the vicinity. • 14 I -, ' Public Water.Supply • The proposed development would provide adequate fire flows necessary for apartment units (2000-2500 GPM). These flows would be provided by water mains constructed at the developer's expense to City of Renton standards. Other Utilities • The developer would be required to provide trenching within the boundaries of the site where electrical cable would be placed. • The developer would be required to place conduit within the boundaries of the site and to any proposed structure. • Homes would be constructed to meet current energy code standards and to minimize energy requirements. • All utility lines would be placed underground. • Utility lines would be installed to meet the standards established by purveyors. • Space would be allotted in the service dumpster areas to provide recycling opportunities. Unavoidable Adverse Impacts Sanitary Sewer - • If the Proposed Action participated in interim mitigation improvements and eventually tied into the permanent interceptor, no significant adverse impacts would be expected. Public Water Supply • None are anticipated. Other Utilities • None are anticipated. 1.6 PUBLIC INVOLVEMENT L- Scoping The State Environmental Policy Act (SEPA) (WAC 197-11-502) requires that public agencies review the probable impacts of public or private actions as soon as enough information is available about the proposal to adequately determine the nature and scope of those impacts. In 11_ order to review the potential environmental impacts that could occur and determine if additional 15 issues should be included in the EIS, a public "scoping" period is established. Scoping is the first of many opportunities for public comment on a development proposal. Formal scoping of potential environmental impacts for the Forrest Creste proposal resulted in identification of the issues to be addressed in the EIS. These issues are soils, air, water, vegetation, noise, land use, aesthetics, light and glare, transportation, utilities (including sewer and water), and public services (including schools, police and fire protection). For a complete list of issues identified during formal scoping, see Appendix E. Once. the Draft EIS is issued, there will be a 30-day comment period for public agencies, residents and other interested people to express their ideas and concerns about the Forrest Creste proposal. A public meeting on the proposal and the information contained in the Draft EIS will also be held. • 16 Chapter 2 Alternatives Including Proposed Action CHAPTER 2 - ALTERNATIVES INCLUDING PROPOSED ACTION 2.1 INTRODUCTION This chapter describes the Proposed Action (Site Plan A) and two alternatives: Site Plan B and No Action. Chapter 3 addresses the potential impacts of the alternatives and mitigation measures. 2.2 EIS ALTERNATIVES Proposed Action - Site Plan A The Proposed Action for Forrest Creste includes two distinct components: a rezone from G-1 use (General Purpose) to R-3 use (medium density, multi-family) and site plan approval. The site plan proposes a 200-unit multi-family residential complex on approximately 11.9 acres, located in the City of Renton, east of Duvall Avenue NE, north of NE 6th Street (extended) and south of the Park Terrace subdivision (see Figure 2). The Forrest Creste development would be comprised of 200 units, 24 townhouses and 176 apartments. The townhouses would be housed in five two-story buildings located along the north edge of the site. The apartments would be in 15 three-story buildings located on the remainder of the property. In addition to the housing units, the site design includes a recreation building, swimming pool and a sports court located in the center of the complex. Two children's play areas would be located to the east and southeast of the recreation facilities. A trail system that would integrate the residential units and recreational features is also planned. Also, a landscaped buffer, ranging from 20-40 feet, is planned for the perimeter of the property. Two wetlands identified on the site would remain in their natural state. The large wetland in the southwest corner would have a 80- to 100-foot buffer and the small wetland in the northwest corner would have a 40-foot buffer. These buffer areas would retain their existing vegetation. Biofiltration swales (to remove sediments and impurities)and level spreaders (energy dissipators) would discharge the site's stormwater from detention vaults to the wetland in the southwest corner. The site plan proposes primary access from Duvall Avenue NE with emergency access only from the extension of SE 140th Street. A 30-foot road dedication (NE 6th Street) is proposed on the southern edge of the site and a 25-foot setback parallels this dedicated light-of-way. A second access would be gained if the NE 6th Street extension is constructed. No buildings or parking facilities are proposed in this area. The proposal will provide parking for 350 vehicles. This EIS also evaluates the potential environmental impacts of two alternatives to the Proposed Action: Alternative 1 - Site Plan B and Alternative 2 - No Action. I 17 • _—r__ N SE. E138TH pVENVEN • • 0 .o- DUVpL 16958.0 'OO'26•E 156.4 ' — ....LoS4.19. Np0 - -- • 2 56' - "0 -- ND 12 . • _ _ - ,,or�g.4S _ \ .05PLpE4 _ - LMO4CAPG 6UrFER3 b IFFER `- - L=2p0.61' — N00°01kE 23 = _ _ .` _ _"=7"00,,•p=1642.E ^/ :,) 1 ir '� v `w II :-: I !' 113 - WETLAND a�1 , ii i I 7/ ‘74,,p ., w Lpv -- .C.. !0 /• Od,n lOd -�- . .. • i Fau•i /�J • ;e �p l! 'l' . ,t:,iT:: ` �A0. • - �h�-40•40� g 138TH PACE SE W _ � Imo• a � 10' L� �—TO�- iii / N� u 1�/,• 4xo,-1.4---4T.-y t.....,i ii,.i:%1•d 01______ _t_4,-4 iv,WVlD".',A,e(•-1.1,b..m.,.rSI\i4:.-i1L1li:6'ri O1A'4.i‘ i .-- --- •_____. ---- •____,...---'Coll). • - i-gc —1 * _------ ---.. ..._::-..---:---.:-..-- fri --.: :.• '.. '. :.• . /0".. ' ‘ -,-------:,-- . co i -bir, x • . ) *Aot\.• -2 e` -41,-- -----' . v :,,,,,,. --.4..,V-.---:--.I-.i--lii-,---,-:.-io4--'.,--M,.1g,i,i_r'.i'-..-k.--. v...--- ‘•\-_•rAl-2_-E.pio-kroeIll'rpn°t.,, ,d‘t.4.k1,.*-/1 . 4.1''''.7L 1:-iiV/-„si1i11r%r iii,-p/:i-./,,w,•i--.---ift-7:-..'„7.z--.-1—,,_--1'_1-_1-i-'---'-„1'--1_--\.---'--,.'\i..ei"-,n-iii.-:V'-sk:vi‘ i1tm4k"- •CIOr,1A11Gk Av.i 1',,i,i-iL-.-.-=i----i-ki---i----a.i---•—•- ..--..-".-,k-.6-=--_--.--_l..7--:1._-.-.-_..-fi_..r-,a.-_i-l•_i-te i----- ./-I c,.:-.ecs 'v' tAvis A 1Icoiv 1 '® _�� ., , e Park Terrace / �,1� 2711 ��•. tc _ �� o �lll: 2 Subdivision 1-:".'?-;-'.:,:lanahalf la--__41711 I 11 ..miMIIIMEsimmiFit frirli*rn...... li ''' co !, z 11'11I1 il & \'' .-"I' , ..,* ‘ -________&,ti,t.: t -' 1 I I 1 irKi _ eiiii• or. 1N1o5CAPE •�"Ilail�.�) _►! (.. IriL44," :\+ \ I3 > Fil _ ,� DIY �+ LANDSCAPP a �i �(' �` IIIIII I _ •• ♦ • \�i I III 1. . = CC =� ��.Iuj ���� IIII III:. . _. , _ =_ ,_di .. CC 1 IIIII► _ _ N j s ►'��ia� _�� -_. (/bypii.:L;�., la. ' III�',`�..r• ��4 II u�J /,.`' 7R/NL :;e A. . �I.II�, ,I—tr r- • /•`I` �.� 1 !Y =' 'l - 1III I114• I I N00"08'57•E 23. _a 4 . ik III I� 1-2)7;11111111-1:;. \I• '19'4441i .:4 Tr Iiii. , �.� _ . Wk. ii ...._-41110/7;-:::72/zz_.,.., -......--•:..... 4..... :.•‘.. V: --....ITia :;•- ... i .1 I irir........,.......:,- ,..-:,. ..... );pi. lit : ' :-::.: 1 in..--.4,--- • i moo ----whogr:/_-..-. --. ) or , " . - - ----ai.. ei 4,pa\ . ....- , !Aiitati,A... , [;,,, i i- Oro /k 4� r. It IIHLill& k , - __ 'ram _ __ IL1• W"" N`i E • 140TH AVENUE SE ` 30t DEDICATION --LPJ424,CAPE'. 5LIPPGiz �5 N00"08'57•E 807.34' - 0' D�IC,KrION _-- Source:Johnson&aund Design Group,Inc. Seattle,Washington.Dated October 15,1991 0 80 160 FORREST CRESTS Renton, Washington. Scale in Feet' N� I PACIFIC Proposed Action 18 Figure 2 Alternative 1 - Site Plan B Site Plan B retains the density of the Proposed Action but offers an alternative site design (see Figure 3). For example, under this alternative, the configuration of the townhouses along the northern property edge would be altered and the units would be regrouped. The entrance to the site would be moved approximately 200 feet north. Recreational facilities and a children's play } area would be provided in the northern portion of the property. The configuration of the 15 three-story apartment buildings would be changed as shown in Figure 3. The building design, height, and building materials would be the same as the Proposed Action. A large open space would be retained in the southwestern portion of the site and both wetlands would be preserved and buffered. No trail system is proposed under this alternative. A 30-foot dedication for NE 6th Street would be granted. The site design includes parking for 350 vehicles. With the exception of the townhouses, parking would be located on all property edges. Access to the proposed site would be from Duvall Avenue NE with emergency access only from SE 140th Avenue SE. If NE 6th Street is extended, an additional access would be provided to the development from the south. Alternative 2 - No Action Under the No Action Alternative, the proposed multi-family development would not be constructed. The property would remain in its natural state. Zoning would remain G-1 since no other development proposals are pending. However, pressure for development of the site would likely continue. This alternative would allow subdivision into a maximum of 14 lots and development of single- family housing at approximately one-acre densities or other semi-rural uses. Should single- family homes be built, subdivision and site plan approval would be subject to SEPA review. In addition, the City of Renton would require a drainage plan, clearing and grading permits, and building permits normally associated with development. 19 0 -- -- -- gth AVENUES•E' DUVA�L AVENUE NE. � \ 13 " -01°15.2 - -- --- - — / / Nob°58,�3 214.5r'_ �� i�1� �� etland p=1542.00 L=200.51' � 1� Cxl�usr'ING Ya ION J�,�•►��z., : _��, '� N00°01'17•E 235.93' `_ Q=07°00'0 �� �,.INN Air , �-- g ?,, _ • —�.ter— J`" E" 1 ll t „,,, ,, s., . .,... . 1 g$ tet 1; d" _.0 . "..PV.4",1'1"--remi ,.._j _,-4-.r. --ef -'1 •'i Ili WI 1.. ,--4100.11 , ] .°-,;. k , Wetland 1 �� jr..7" , :,.:.,t. .. t:a[t,... , ��� �I i... .. vit _v.:. 1 izo �',i�a -'���� ■l C /r'TJ% °�• •.`w, R lamas 1� /\ • ' �:may e o o �_ —�' . •-I 1:o, !� �� 1 ,�I ¢ $ 138 th PLACE SE kw.:(A. ...vi.:,...,,,Liiraomatirik...; �_ s . I ol_./.._ "...r.4.-.-;.\---• - s..;. * 1 .I'Wfi '.* .4';' ". :AL 1 Ogoom—N.-1:4 -.- . .., , . .,40"sit tins, 1,131: li MA •.�. :-'� r Ic,.r Ott`` ,,il� r�l--_�. 1'.. ' ��� � 11,II o *':?.,.:1--p, A'it,g4414.0 r- 4 410(.I 0 4,A%9?)-)t1-%.W10.\-.,.-1.,.r1tlt.'e:l;rev'i...i..,k . A. / lbz. l,, ,, + `` ,I' .!; .fig `ia �i �4i. r�••. . :',.:,,wI .�,.� ►:�� , ,_ '1 Nkid \_� �.: i bo• � : 4.1 ...;,;;.: Al �l4.ItA'M • i.4k':r z:i,i:.iP.zP..t.:i.'i 1.1r..ok‘ ii. tA 6..l-:_4t._,•1,,,1i,,.$..A......% • t. .vpD. 'fill ■.. _e�',, . . ^I � 1 Nlifftr' _ "° . M rt iI 1 *0)'.14:1t7. 1Ki i‘t;_li .''--k e 'en-SPa, ., .44% Iti -44----.*:‘:-.--.Er„, _ bar_ er,, ,QIP 0 ,to a • l `, ' , dr1 -ici.rui---7 ' , `t gc,•;"'•:. c y ` —� , { . / _ ° ► ," 1� Alio '•� (T( lr ) - :1-• -41 Allt04:---.-\.. ' .4%. 470 I . -04—IrelOraikrie:;-- • • -'•. •:: t-" • ..*. '.-dt^3 • mate ., 0�\.•;�. . 4., r , r• 4, -'�►_ 1 : . .�t �•all P..,.‘ari, o j 14w . .1.... IIA11 � ; it i _., L •; I 1r' =-11:'il� may.' .i— 10 ISkge-L ' -'''' '-N VA.Lti a at . ] . - rpri:. AM . } ,�,t7 �� re, .4k‘.!iFFZ. Y i� k r �:• • • •: f; :: ,y -`+1 l e J�. r �08'b7•E 23. 1 A !tR''''' • V-.-., r. .. mil.. , r. gjo 1.1 fil 4 co 4 1Ve- v d '/Ni'3/4-:tret .4 ,e4:14 , L....0--4,:::,- -. ve a , l 4 J'Air # 1' �/4 ;�e •►i '7:s ,lf49. 4*41 ;1#... ..fir'4';f,ji# ,;._,SelitMillit 1.1!-A;;AkA 4 I •' , I!Ma I JIM_ PI !.,.• p. ,...': -' .•••.'''24riliiiiV": 11Jr.--/M1111.111..- 1--•$.4111:= ' ' '"/I ." , [r., ,M1..t i i' ' ' t! g, 7I- - • 4.4 retail r ki) ---`41 'wrill Ai Py Mks cil tr) . 1 ii�'L40��� �' 11.1�' , f�� ■:.pit 1��?i IVOLVICW,. ........N..: i -- -- op A'' .'� -@ iero..�•wtiba ii / (_ Fill Plias •• ../0��- ,,,��i' T v.�r ° •c• :0°.o °. . l . i .+�L l/: 7/p ml�_CM 1._ ... .!.!� •;0 140th AVENUE SE 450 . 410 \N00°08'57'E 807.34' Source:Johnson Braund Design Group,Inc,Seattle Washington..Dated Aprli 26, 1991. ` 0 80 160 N� FORREST CRESTS Renton, Washington i I PACIFIC Scale in Feet Alternative 1 Site Plan B 2O Figure 3 Chapter 3 Affected Environment, Significant Environmental Impacts and Mitigation Measures CHAPTER 3 - AFFECTED ENVIRONMENT, SIGNIFICANT ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES 3.1 EARTH Affected Environment Surface The site is on a portion of the upland between May Creek and the Cedar River. The land within this 11.9 acre site slopes in a Southwest direction from a high of 455 feet in the northeast corner to a low of 395 feet in the southwest corner. Slopes average from 10 to 20 percent (see Figure 4). According to the Soil Conservation Service survey for King County, the soils on the site are classified as Alderwood gravelly sandy loam. This is a moderately well drained soil that has a weakly consolidated to strongly consolidated sub-layer and usually exhibits moderate permeability, moderate erodability and a moderately high runoff potential. These soils are typically shallow (2-4 feet) and are underlain by relatively impermeable glacial till. A geotechnical study was conducted for the site and is included as Appendix B. During that investigation, old fill soils up to eight feet thick were found in the northwestern corner of the site. With correct engineering techniques, the Alderwood soils could support the buildings and roads proposed for this project. The geotechnical study recommends that the old fill soils be removed from building and roadway areas. Subsurface The U.S. Geological Survey (USGS) has mapped the underlying geology on the Forrest Creste site as Vashon till. This formation is made up of loosely sorted, highly condensed material which was deposited about 15,000 years ago along the base of the Puget Lobe during the last phase of glaciation. The geotechnical study performed on the site generally supports the USGS determination. In each of ten test pits, an average of six inches of duff and topsoil were found over reddish brown, silty sand and gravel. This deposit is underlain at depths of two to four feet by olive to gray, medium dense to dense, gravelly, silty sand till. This till material extends to depths exceeding ten feet, the maximum depth explored, and would be capable of supporting the uses proposed. Groundwater was encountered in many of the test pits and probes excavated on the site. Light to heavy seepage was noted at depths of two to four feet throughout the entire western and northwestern portions of the site. Perched groundwater is typically more prominent in the winter months when precipitation is greater. Groundwater conditions in the area surrounding the site were evaluated using well logs on file at the Department of Ecology. From these logs, there is evidence of a regional groundwater table at approximately Elevation 350 feet that flows to the west. 21 1 - • VENUE S.E. ,�- - 138th AV,— __ p\�. acuMnvuM ca o DU\gal AVENUE NE h ,c1+ °° \ ° .0 ° �y \y G\ \ _� p A Q./EMNT 1 O. O A\y 9 _y± 6^ At_ 09 f: 00 EDGE OF y ,` .O' -�.a, ram :- -- 9' 00... -• 1 �01 �1 �91 ,�y\ �yo eo 4 0 ° ., . .o ° 0 9 I l ��' R-/SSB' GEO49: 0� G - NOO'Cr%7 E h o `- ��G P .914'SG' L= l9L 0 3 A° • 0 I 1y 0 4 G ° 9 ��A\ 43'j l! Wg a6E, O\R�40 q\ y O0 58 _ 9'�� G .3- �_ ... e(Q�G4.R 0' A\ /11 D 401 �4p O /BCONC CULVERT •••• ..._....Q95• 3' oy O 00'00 '•' \3 41 0N. 4\ p a /NV. 393-/5 FLdGE.O WeTLdND 4.12E-41:1> ......._•g/ '� C_ �/, A A ° m • 1 p•\ 3` '� 3g5 3g1 : 99 39°01�-,.-.�.�.0P- .CG A�y.A �0 0/ 9— \.�p D1\ \y3 aJ • /G"L' ,e 3/ 39 3g pOG1 e \ a A\D \.0 \y Q Orr-, _ q I0' �_' .0 ..•-�., /0.G ? 00 4� o I\ A� �/ — 3 0 �� A\ A\A' 4\ .b 3 Aa p° Al CP ` .\ '- \\ .\ n i/ \�' A1� vA _iD 99 e 4a1G \0 \ .0 � • 4� / 8thPL S.E.• G46 to''',� /%.- (ye / A0� 40Q ,\ A\00 A p�°�� p A00'O A� \ A\' /N a 6 / j p° \� A� O 00 0 // /I ..r/G F °O .,"�-� h AOh --A" / A 4 P5 4, A3\� 6 YV/RE O�_ • 4� 0 A0y p0A AGA• qa3' 9 — 0 OG poi o�� � A 4\ 1 � 1 • / A\' AOy 0 .3 J 1\c °1 A G� A�� 1 ,A G p,( //�— 11.1 CO 0 9.3 y \ /' /3� A A A°1'D°A Al 4 A\ 4c J / \ 0 A09 p\� _p�\ �� �ip�1� G • p\ y O 4 400 409 \O fy \�G/ AP.° A ,8J/ y �.1 A I 0 �c ^ \°° 1v /O AOg' /4 \y'—\A 4 \ o F 04 05 9 / p p $' �o. .tea �J 10� d ta, 4 416 4\4.70 f-1 ii• e Afp 4 CONTOUR /NTERV,dL= TWO FEAT �.s.q\�. 1 3 6 f 440.. G 4\ 0 433 GG 4- '� 4 v'r / 9 p\ 0 Sll D\0 p\3\� 10 \\0 \Axh\ 3 4\0 �jd� 3\ 4Jd 3 5g 4� A A7' /•srO.ey 4 CVO 4/,> A \7 \• f�'��y'`h 051, �' WODO F07ME Z \/.0 _/ D AO / 4 4) ,5��_d 00 A3 y FF•443/O Fi ' 9 _ \yG A\0`Y !PA. A d„PJ 430� 4y0 P. �,b /0 r7 � c. A p�--�� 0 4370.6g1 �43� 3�6 4 • 5 1 a 6 ` �� w ;0 4,\ o 34 4 Ayo• 0 4�`I \e Y. AOq ._. •a I .� a�3 �\\ A0 A\e A d 43G —A l AA\ p4 / 1 r. aG gg ` 5s\ o o .1 \ Ap\ 1� 1 A�� \ 1 438 _ a \G 0 1 1 4� , x ,�q r2 A5 I y % WOOrJ FAME n' \ O�\ 4 + 0 I p0 G pr A GaQ4GE �. / FF r 64B 97 O CI'. 5 /� 4� 0 3 43 A ______..---- wive FENCE ./ \ • IPS. I ‘..--. \ F F- . ,.." AP. I 6 q 09j,19 Ay\\ qd7, -- t,tG� 74A, 4' r N'.apG 4 , 0 / 40 \ A'. :� A ,„ A /4G p4�4A- ' i Ag M1 I_;, a� 4� D\� 0 3 1 p0� 9 D�\ A` d d G A I t %" 4° 4,0 / ' 39 O A�1 9 .e AA rn/ SHEO ••• l�/ i 9 t, oo I _ :.\> G� t`30 A� A�� / x / dd 6 450 CP\ 73 „.a.a„ 2 4 • 4 / dL3LE U p1'p \�9 \ A°0 4,gG'� A9� p3� ,g /aF G' G \� s 60 O 4g W+� h h I9"CONC.CULYRT a A \�4 p93 A 350 d �>\ A\ A� A33 1��0 at p40 �� A 4 py3 �I o Q / //N✓. 457 0.3 p 90 A3 / �� ` 'ti. 9\t%;. A �0g / j A`�> to O��/ �I 3 A 0� G i�$'� •/Q „a .A at 490 A'1 ,Tya. 0 5 m._ Ar co/ye.CULVERT '� \ h , g 44 '\ t't GG0 p•0 0 p'9 4 pA- e kr AAA � I / N A,3 45 p9 43 A pA 0 \\ 4`G Ak0 Dp0' AA \1 / AAG 9 4y i 0 y I \_____,`�u,0� aWM I 0 D \\ 0� AA 607,94' 9 y 0 6g�--L�__ 4ll g�/ A�°?,--- ��`r W/REE 4A Aye Ay eG I 9_ems_— S -w TeeOlh—AIi�S.� oi� ° tlhfao�• 4 1 I, c A �- A 1.5' 4. �i 4—1 Ap\ 40 At 4y ' LtIl .: �\ Q\° ---o t 4'W/RE FENCE !• / dG 0' Ads -.0__----5___...�A-�_ "-•pG. �I a ,, p N vo"oa's7-E y1 1 1I0 4 pAp qdB 4Z0 pA 4A9 f 4 3 P • 4� ��A\ �.3 //� m2 Ag �� °' y1� A�y 9e\ 1,� �� 0 40 80 u p�}° A p4A•, AA rn0 A AA0 ph° j ° Ay° 1 Scafe In Feet FORREST CRESTE Renton,.Washington ton • . I PACIFIC o2 9 Topographic Map 22 Figure 4 Slope Stability The slopes on the site are gentle to moderate. The steepest slopes on the site were estimated to be 15 to 20 percent (see Figure 4). The entire site is underlain by dense glacial till, and the geotechnical report indicated that slopes should remain in their presently stable condition provided that erosion prevention measures are implemented during construction. According to the geotechnical report, the seismic hazard associated with glacial till soils on gentle to moderate slopes is low. The area lies outside Class III Seismic Hazard zones as delineated in the King County Sensitive Areas Map Folio. Environmental Impacts Proposed Action Grading activities would result in changes to topography to create nearly level surfaces for building pads and parking lots. These earth-moving activities would result in increased potential for erosion and the sediments created could reach on-site wetlands. The site soils are moisture sensitive but would support the proposed construction if the recommendations of the. geotechnical engineers are followed (see Appendix B). If the native soils were to become disturbed or wet they would need to be removed and replaced with clean crushed gravel or structural fill. Roadways could be built on structural fill or recompacted native soils after removal of fills and organic-rich soils. The site soils have a moderate potential for erosion following clearing. Eroded materials would likely be deposited close to the source of the erosion in the case of coarser-grained material. Finer grained materials would be transported to low-lying areas on site. There is the potential for fine sediments to be carried to the wetlands and/or off-site. Proper erosion control prior to and during clearing and grading activities would minimize the potential for sediments to impact and/or off-site areas. The full extent of grading and resulting amounts of earth that would be moved have not been calculated at this stage of the project's development but will be determined during subsequent design phases. Alternative 1 - Site Plan B ti Grading and other construction impacts similar to the Proposed Action would occur. The quantities of earth that would be moved have not been specifically determined. Approximately 2,800 square feet of additional open space in the southwestern portion of the site would be retained in its natural condition. Alternative 2 - No Action Under this alternative the proposed development would not be constructed and no impacts to the soils would occur. Should subdivision and/or five or more units of single-family housing be 23 I ` proposed in a later application, clearing and grading for site development would be subject to SEPA review. Mitigation Measures • Erosion control measures would be in place prior to and during the clearing and grading phase. Bare soil, particularly on slope areas, would be protected with jute mats and/or I, immediately hydroseeded with appropriate vegetation to prevent erosion. • A grading plan would be reviewed by a geotechnical engineer prior to commencement of work. • To minimize difficulties in working with moisture-sensitive native soils, grading would be performed during the drier season, from March to October, and when soil moisture is reduced. •• If native soils become wet during the grading phase they would be removed and replaced with clean crushed gravel or suitable structural fill approved by the City. 6 Stormwater would be contained in retention/detention ponds or piped to a suitable collector system or ditchline. • During grading activities, if seepage is encountered during cutting, interceptor drains would be constructed on the uphill side of roadways and building pads to prevent the working area x from becoming wet. Proper drainage would be installed around the perimeter of all foundations. • The near-surface soils below the topsoil are loose. The native soils may need to be recompacted depending on the depth of the excavation. • Old fill soils in the northwestern corner of the site would be removed from building and parking areas. • All temporary erosion control features would be regularly monitored and maintained. • Permanent erosion control measures, including vegetative cover, would be established after construction to stabilize exposed soils. • On-site inspection and monitoring would be carried out by a licensed geotechnical engineer. • Site preparation would follow the recommendations included in the geotechnical study prepared for the site and included as Appendix B. 24 Unavoidable Adverse Impacts Grading operations and vegetation removal necessary for urban development would alter the existing ground surface on the site. Some potential for erosion would be created during the construction phase. 3.2 AIR Affected Environment The state of Washington is divided into six Air Quality Control Regions for purposes of monitoring and collecting data on air quality. The proposed Forrest Creste site is within the jurisdiction of the Puget Sound Air Pollution Control Agency (PSAPCA). PSAPCA and the Washington State Department of Ecology (DOE) monitor air quality at sampling stations throughout the region and State respectively. The monitoring stations closest to the site are in the Duwamish Valley located at 12026 - 42nd Avenue South, and James Street at Central Avenue in Kent. These stations monitor for particulate matter and wind speed and direction. Renton complies with the federal air quality standards for monitored air pollutants. At specific intersections, when stagnant weather conditions combine with traffic congestion, carbon monoxide can become a concern. National and state air quality standards for carbon monoxide are an average of 9.0 parts per million (10 milligrams per cubic meter) over an eight- hour period and an average of 35 parts per million(40 milligrams per cubic meter) for one hour. These limits may not be exceeded more than one time per year. Present air quality at the project site is good, since it is in a generally undeveloped location. Lower traffic volumes and lack of significant industrial development mean that air pollutant levels at the project site would be less than those which occur in downtown Bellevue (the closest monitoring station for carbon monoxide). Readings at the Bellevue station exceeded the allowable standards only one day in the three years between 1985 and 1988. Environmental Impacts Proposed Action Air quality impacts associated with residential development occur primarily as a result of two factors; additional traffic and fireplaces and/or wood burning stoves. The 200 units proposed for Forrest Creste would generate an estimated 1,235 vehicle trips per day upon project completion. This increase in traffic could be expected to increase carbon monoxide levels, as ( well as other auto-generated emissions such as nitrogen oxides, hydrocarbons, and oxidants. Fireplaces are proposed for some of the units and would contribute smoke and particulates to the air. Studies conducted by PSAPCA in the Puget Sound region indicate a clear correlation between wood stove and fireplace usage and high concentrations of fine particulates. State legislation (RCW 70.94.450-487) regulates the use of wood stoves and fireplaces. This 25 L u , legislation allows burn bans to be put into effect under certain atmospheric conditions. Any use of wood stove or fireplaces would be subject to applicable regulations. Construction activity would have temporary impacts on air quality including: emissions from construction vehicles;increased suspended particulates(dust and smoke)during grading activities and from unfinished roads; and odors from asphalt paving for brief periods during roadway construction. Alternative 1 - Site Plan B This alternative would result in impacts similar to those associated with the Proposed Action. Alternative 2 - No Action If the site were to remain undeveloped, there would be no impact to air quality as it currently exists. If the site were to be developed as single-family housing and those houses were to be constructed with fireplaces and/or wood stoves, residents using either of these sources of heating Would be subject to state regulations concerning their use. Mitigation Measures • Road improvements suggested as mitigation in Section 3.12 would act to minimize congestion thus reducing concentrations of carbon monoxide emissions. • Literature regarding participation in transit, carpools and vanpools could be distributed to new residents in an attempt to reduce the number of trips generated per day. ' I , Impacts associated with the use of wood stoves and/or fireplaces would be mitigated by State and regional regulatory activity (i.e., enforcement of the region-wide burn ban). • Watering exposed dry soils during construction would help protect air quality by minimizing the suspended particulates in the air. • Electricity or natural gas would be installed as primary heating sources. • Wood stoves and/or fireplaces could be eliminated from the design of the project. Unavoidable Adverse Impacts Wood stoves and fireplaces would contribute particulate emissions to the surrounding environment. Combined with other sources of particulate emissions, they could contribute to levels which would exceed the 24-hour standards and lead to the burn ban being enforced. r , 26 ar 3.3 WATER Affected Environment Hydrologic Setting The site is located within the upland portion of the Maplewood Creek drainage basin which drains into the Cedar River near the Maplewood Golf Course approximately two miles upstream from the I-405 crossing (see Figure 5). The climate of the site is typical of western Washington. Based on the precipitation record at Sea-Tac Airport, the average annual rainfall in the area is 38.6 inches. A large portion of this rainfall occurs in the period from October through March. Site Hydrology Drainage Features Vegetation on the site consists of a middle-aged fir, cedar, maple and alder forest with thick underbrush. This existing, relatively dense vegetation intercepts precipitation and through a process known as evapotranspiration, releases much of the moisture to the atmosphere. Little runoff currently occurs at the site. However, during heavy storms most of the property (9.3 acres) drains to the low area in the southwest corner then into a ditch along the east side of Duvall Avenue NE. The northwest corner of the property (approximately 1.4 acres) drains into the Duvall Avenue NE ditch at the north end of the property. The southwest corner drains to the south off the property (see.Figure 5). No year-round streams exist on the site. Wetlands Two wetlands were identified and delineated at the Forrest Creste site. These wetlands are defined and described in this section of the EIS. The complete text of the wetlands report is found in Appendix C. Wetlands form where water is present long enough to develop distinct soils (hydric) and where specialized "water-loving" (hydrophytic)plants grow. Wetlands include such familiar areas as marshes, swamps, and bogs. Wetlands may also be dominated by trees (forested)as ti in the case of Forrest Creste.The presence of water influences the soils and plant life found in the wetlands. The water table may be at or near the surface during the growing season and the area may be covered with shallow water all or part of the year. Water levels ( fluctuate with seasonal changes and the soils may alternate between saturated and unsaturated. " ~ Wetlands serve a number of functions, such as flood control, groundwater exchange, water quality control (through the filtering processes available) and wildlife habitat. 27 n , _____ . N MAY CREEK SE g5th`Nv' �y,4`, ' NE.27th ST. ` -1 o .L s to co 9 N=1. c A 12 A N OZ el SUNSET s 0. OD 900 N 'PARKDR. �a z yQ• a J J :.;A' PROJECT y z W > k*f SITE iV e / W NE.4th ST CO el I \ 1,0 y). r 0'Ft 1,9 R 169 -MAPLEWOOD 9i`13 � ="�%;'GOLF s, .•3;. • v •„'COURSE `'`` y . Forrest Creste Renton, Washington Off-Site Water Bodies I PACIFIC^ Not to Scale N 28 Figure 5 L Wetland 1, .61 acres in size, is located next to Duvall Avenue NE, in the southwestern portion of the property (see Figures 2 and 3). The majority of this wetland extends off-site to the south and in its entirety is approximately three acres in size. Within the boundaries of Forrest Creste, Wetland 1 would be classified as a palustrine forested wetland according to the USFWS classification system (see Appendix C for a further description of this wetland type) The Department of Ecology has designated Wetland 1 as a Class II wetland. The wetland has moderately high value for flood control, water quality improvement, and groundwater exchange due to its seasonal ponding nature and large size. Its value as habitat is limited by the close proximity of Duvall Avenue NE., although the large undeveloped forested upland buffer that extends east of the wetland serves as valuable wildlife habitat. Wetland 2 is located in the extreme northwest corner of the property, adjacent to Duvall Avenue NE and is .03 acres in size. Most of this wetland was filled during the construction of Duvall Avenue NE. The small remaining wetland is likely part of a larger relic wetland system. It would be classified as a "palustrine shrub/scrub wetland" according to the USFWS classification and is classified as a Class III wetland by the Department of Ecology. It receives water from the roadside ditch to the north and from adjacent upslope properties to the east. It has a moderate to low value for flood control due to its small size. According to Renton's wetland ordinance, Wetland 2 is exempt from regulation. Groundwater The geotechnical engineering study identified a moderate amount of perched groundwater above the till layer, particularly in the western and northwestern portions of the property. Construction of subsurface structures could be made difficult as a result of the perched groundwater. The geotechnical investigation was conducted in June, 1990 and concluded that greater volumes of subsurface water would be present during the wet season. An evaluation of well logs in the area indicates the presence of a regional groundwater table at an elevation of about 350 feet. The sole source for domestic water for Renton is its reliable, high quality aquifer. In order to protect this valuable resource from contamination by regulated substances, the City of Renton has developed an Aquifer Protection Ordinance (APO). The ordinance is currently awaiting adoption. The APO establishes regulations and inspection and monitoring standards within an Aquifer Protection Area (APA). To comply with this ordinance, anyone who owns or operates any type of facility within an APA must have an APA Operating Permit or Closure Permit from the city's Water Works Utility. This applies to existing and new developments and must occur within six (APA Zone I) or twelve months (APA Zone II) of the ordinance's effective date. The Forrest Creste project site is located within the City of Renton's APA Zone II. Once the ordinance is adopted this designation would require the proposal to comply with regulations outlined in Section 9 of the APO including: 29 _ I l - monitoring impacts associated with changes in land use; hazardous, combustible or flammable substances; - prohibiting conversion to or installation of fuel oil heating systems; -. waste water disposal; - pipeline, storm and surface water drainage requirements; - construction activity standards; - applicable permits and - the potential for degrading groundwater. Off-site Drainage Upstream Tributary Area There are approximately 24.7 acres of off-site land which contribute drainage flows to the property (see Figure 6). Most of the land from which drainage flow originates is developed as single-family residential. Approximately five acres of land east of the property is presently undeveloped and forested and drains to the site. The drainage channel which runs through the center of the property receives runoff from approximately 10 of the 24.7 acres identified. Downstream Conveyance Runoff from the site and tributary areas drains into a channel which runs along the east side =_ of Duvall Avenue NE. About 600 feet south of the site, the channel crosses Duvall Avenue NE through a culvert and travels west for about 1200 feet through heavily vegetated land at a relatively flat slope. The channel receives inflows from the area west of Duvall Avenue NE to the north. It then heads south, crosses NE 4th Street and joins with Maplewood Creek approximately 2,500 feet downstream from the site. The creek then heads south through a steep ravine, crosses the Maplewood Golf Course and enters the Cedar River. The City of Renton's Maplewood Drainage Basin Study notes several specific drainage problems in the immediate vicinity of the proposed site: • The existing cross culvert that conveys runoff under Duvall Avenue NE appears to have limited capacity and should be analyzed to insure that it can accommodate the 100 year design storm event. • There has been some flooding and scouring from erosion noted at the Windsor Place culvert, a 30-inch cross culvert that flows under Bremerton Avenue NE on the eastern border of the Windsor Place apartments. Flooding has been noted in storms of greater than 10-year frequency. • There was flooding noted on January 9, 1990 (approximately a 33-year 24-hour duration storm event) that occurred approximately 300 feet east of the intersection of Duvall Avenue NE and NE 4th Street. The ditch and drainage system that conveys storm water NE 4th Street and southward was over capacity. 30 ,IZ' 1 , i 111111o1'lehiil4lalaris.lse.11•I�.�l I"i I. I I 1---_1----- — ? 7 N.E. 10TH ST. s.--w---- I Z �' , a w ' i 11 • I ! 1 AO .I-ii. •#g ; I . r II I ••1S:j ' 14 S 1I SO ��r-4 i -- --a.—iNib �- is.---aim — W a S.E. l l bT* ST. 7 — 1 ,.1. 1 ~ Ye"^ 7 < W r 3 4 4 G Q W HONEY DEW c > .Q M NTAR� HO q ELEMENTARY SC HOOL OL T I ._ ili M iii:;; ::::iiiii::::::i.....::y....IL:*.:::::. :::::..,:.:M.... ram' i ' � e .. • �P I :<.s 14 Q � .fit '°::<:>:`>:^?>• ... . 121ST ST. i I tl 1111.111.11.11,, ..I o•. t`:�.o� ::�'',1>: ream ��ittant� t!:.'::::;tiiill.NVONITIB,N111 .: .... ............. ':+: Iriterm �$.... .............�. •;Y1. ' S''r. ........ . .. ..::.. ... . ... i— u a ribr tar to T ................ .. 1--r' Area Y o: n I i Poin t 1 4MIe Down : : '� l ri1— Stream fromProJeCt .::.::: .... . : .. .:::: ...> W �.. i I t. I : t. 1 0 ,,....:::.::•:::::::::: ::::."-iii:: :-:•:;ROI::::WiNtlizMy. 0 ui rmpi z . ........................ ... ................................... . ui , - _I - , ....-„,-.-,-,-...... .. ,,,,,,...,..,..:,,,,,,,:. .. • , . z r t o t, -, 40 Z I awl N.E.. 4TH ST. �� - - S.E. 128TH ST.— - , , 1 __ _,_, Forrest Creste Renton, Washington D'L� — 500 �000 Offsite Drainage : I PACIFICA Scale in Feet N 31 Figure 6 • South of NE 4th Street the channel that passes through the Baake Development is restricted. Increased runoff would require drainage improvements along this area including: channel reconstruction with new stream side plantings and a maintenance road. • There is evidence of significant accelerated channel erosion impacting the stream bank in the steep sections of the canyon portion of the main channel. This indicates the need for measures to reduce the velocity of storm flows from new development as the existing velocities exceed the cohesive limits for almost all present and future storm flows. Considerable erosion is occurring in the ravine area as documented by the King County Reconnaissance Program. This erosion has caused landslides into the creek and loss of trees and channel protection structures. Upstream erosion has caused sedimentation problems in the golf course area. Fish resources in Maplewood Creek are not well documented. Neither the Department of Fisheries (Kreitman, personal communication) nor the Department of Wildlife (Pfeiffer, personal communication)has performed recent studies of fish in the creek. Some population of resident trout and possibly some salmon have been reported (Furstenburg, personal communication) in the lower creek below the ravine. A block at the sedimentation pond at the base of the ravine prevents migration of fish upstream. Environmental Impacts Proposed Action Under the Proposed Action approximately 41 percent of the site would become impervious and 59 percent would be in open space or landscaping. Approximately 67,292 square feet (1.54 acres or 1%) of the site would be left in natural vegetation as buffer around the on-site wetlands. Surface Water Quantity Development of land results in an increase of impervious surface which in turn results in an increase in both the peak rate and volume of surface water runoff during storms. This impact is due to a reduced capacity of the land to absorb and store rainfall and the increased speed of the runoff as it is transported to the downstream system. Increases in peak flows due to development are the major cause of erosion, bank instability and localized flooding problems which occur downstream in Maplewood Creek. The Proposed Action would convert approximately 41 percent of the property to impervious surface including roads, roofs and driveways. Approximately 13 percent of the site would remain in natural cover. The City of Renton requires that runoff controls be provided to reduce peak flows to pre- development levels based on criteria in the Surface Water Design Manual (King County, 1990). Slightly different, more stringent criteria are recommended by the State of Washington Department of Fisheries (1990) which call for flows to be reduced to one-half of those which would occur under undeveloped conditions. The design of stormwater facilities for this project is based on the City's requirements. Appendix F presents a technical discussion of the hydrologic analysis which was conducted for the proposal. r 32 Surface Water Quality In addition to increasing the- quantity of.stormwater, development typically results in decreased quality of stormwater both during construction and once the units have been built. The primary construction impacts to water quality are erosion and transport of sediment from the disturbed construction site. Sediment entering the downstream drainage system may have several adverse impacts: • Reduction of capacity of downstream drainage facilities and natural channels. • Formation of sediment bars and other unnatural features in stream beds. • Damage to fish migration, spawning and rearing areas caused by clogging of stream gravels with fine sediment and tissue abrasion and gill clogging in fish. These impacts may be felt both in the lower portions of Maplewood Creek where fish populations have been reported, as well as in the Cedar River. • Reduction in the aesthetic value of streams. In addition to construction impacts, land development can impact the quality of surface water runoff after construction. Major pollutants of concern include the following categories: • Sediment production from developed land is generally significantly higher than that from 'll undisturbed/land. • Oils and petroleum residues wash off streets and accumulate in sediments and may harm aquatic organisms. • Toxic metals (e.g. cadmium, chromium, copper, lead, zinc) are present in automobile brake linings, tires and engine exhaust. These metals may accumulate in sediments and harm aquatic organisms. • Other pollutants of concern include nutrients (phosphorus and nitrogen) from gardening activities which may feed algal growth in downstream ponds.and oxygen-demanding organic material. Pesticides,used on site could be washed into on-site wetlands. Many contaminants are absorbed by fine sediment particles. Therefore, control of sediment can reduce problems associated with other pollutants. In addition to the chronic sources of pollutants described above, a primary concern is contamination caused by dumping materials such as waste crankcase oil, paints and other materials into stormdrains. There have been reports of failing septic tanks located in the area tributary to the project site which could contaminate surface runoff from the property. If such conditions were identified, the problem could be corrected under the direction of the King County Health Department. 33 Wetlands During the construction process there is potential for sediments to be washed or blown into the wetlands reducing their water-storing capabilities. Heavy equipment used during construction could damage root zones around the wetland buffers, reducing their water- absorbing capabilities. Seeds from hydroseeding could be blown or washed into the wetlands and begin growing, thus altering the composition of plant life. Fertilizers, which typically accompany hydroseeding, could over-enrich wetland soils to a point that eutrophication could result. Planting of non-native species around wetland buffers could eventually introduce such plants to the wetlands where they would compete with native plants for air, light, and water. Some plants invade more easily than others and can become dominant. Construction of the proposed NE 6th Street would impact Wetland 1 by filling a portion of it. Since the proposed NE 6th Street has not yet been designed, it is not known how much of the wetland would be filled. Indirect impacts would also occur through increased runoff carrying urban pollutants and disturbance to the hydrologic balance between the north and south portions of the wetland. After occupancy, children and pets could enter the wetlands which could reduce plant coverage and cause erosion. Wetlands and other "open space" parcels are often regarded as dumping grounds for garden waste and other unwanted materials and hence loose their visual appeal and some functional values. Groundwater The groundwater elevation could increase due to the removal of vegetation which currently absorbs and removes water from the ground through evapotranspiration. The intent of the City of Renton's pending Aquifer Recharge Ordinance is recognized in part by the stormwater drainage system proposed for the site. The proposed detention vault, biofiltration swales, and level spreaders would meet the requirements of that ordinance. The project does not meet the requirement for the installation of a wet pond for a project which has more than one acre of impervious surface subject to vehicular use. Downstream Impacts Existing drainage problems noted in the Maplewood Drainage Basin Study could be further aggravated by the increased runoff volume from the development of the Forrest Creste site. According to city codes (4-22-5), during the site plan approval process, the proponent will be required to provide more detailed storm drainage design including a conceptual drainage plan. During that process the site plan may require revision to incorporate additional drainage facilities (i.e., wet pond, infiltration). 34 'Alternative 1 - Site Plan B This alternative would result in impacts similar to those of the Proposed Action except that approximately 68,932 square feet (1.58 acres) would be left in natural vegetation. Approximately 45 percent of the site would become impervious and 55 percent would be in open space or landscaping (including the wetlands and their buffers). Alternative 2 - No Action Under this alternative, if the project were not constructed and the site were to remain in its present condition, increased runoff would not occur and water quality would remain constant. Should the site be developed under the existing zoning, impacts similar to the Proposed Action 'would occur although they would be of a smaller magnitude. With 14 residential lots, there ;would be hard surfaces for individual homes and driveways as well as roads within the site. Without parking for 350 cars there would be less area in asphalt and less stormwater runoff. 'A drainage plan would be required to be submitted to the City of Renton with the preliminary hplat application. Mitigation Measures P I-- ;• To mitigate potential erosion and sediment impacts, the City requires that an Erosion/ Sedimentation Control Plan be provided to prevent sediment-laden runoff from leaving the ! site during construction. This plan would be developed during the design phase and would include a combination of structural controls (e.g. sedimentation ponds, silt fences), cover measures (revegetation, temporary cover for disturbed areas), and construction practices. The plan would include, at a minimum, the following actions: - Access drives would be stabilized with crushed rock to prevent transport of sediment to streets by construction vehicles. - Tree clearing limits and wetland buffer areas would be clearly delineated to prevent unnecessary disruption of vegetation. - A phasing plan would be developed to maximize grading and disruption of vegetation during the dry season, to minimize the area of disturbed land at any given time, and to plan for rapid revegetation of disturbed areas after completion of grading. - Topsoil excavated during grading would be stockpiled and reapplied to areas being revegetated to enhance rapid plant growth. - Silt fences, sedimentation ponds, or other facilities to ensure effective on-site containment of sediment would be used. Construction of detention facilities early in the project would serve as a temporary sedimentation control. - Off-site drainage onto the property would be minimized by diversion structures or other appropriate facilities. 35 - The site could be watered down during construction to reduce dust. - The wheels of construction vehicles could be cleaned prior to leaving the site. • Additional erosion control measures will be used during seeding to avoid wind-blown seed from entering the wetland. In addition, seeding methods used within 100 feet of the wetland will be ones which do not allow of transport of seeds into the wetland. • Drainage from the entire project would be collected and transported to the southwestern portion of the property in closed drain pipes. Design of these facilities would comply with the City of Renton's design criteria which is based on King County's Stormwater Management Ordinance. Detention facilities in the form of underground vaults and/or ponds would be provided to prevent increases in peak flows entering the downstream conveyance system. All flow from the site is anticipated to be detained in the facilities, then released at a controlled rate to biofiltration swales and then to level spreaders. • During subsequent phases of review (i.e., site plan approval), the site plan may be revised to include additional stormwater management techniques. Those techniques could include detention vaults, a wet pond, and biofiltration to control the peak rate of flow. Techniques to control increased volumes could include infiltration in accordance with the city's aquifer protection ordinance. • Biofiltration would be used to mitigate the impacts,of the Forrest Creste proposal. It has been shown in local studies to be an effective means of improving runoff water quality (Horner, 1988). Since Forrest Creste is located within an Aquifer protection Zone, biofiltration swales would be lined to meet the requirements of the pending Aquifer Protection Ordinance. • Water leaving the biofiltration swales would flow through level spreaders which allow runoff to disperse evenly into the existing on- or off-site wetlands where stormwater drained prior to development. This would prevent a point source of discharge which could cause erosion. • The pending Aquifer Protection Ordinance makes provisions for the application of pesticides, herbicides and fungicides. Applicators of these regulated substances must apply for an Aquifer Protection Area Operating Permit. • Wetland sediments would be monitored by the City for pesticides and other stormwater-borne contaminants. Action levels would be set by a qualified ecotoxicologist. If environmental concentrations exceed the action levels, an immediate public awareness program would be implemented. This public awareness program would advise neighbors of the problems and identify ways in which they could co-operate to help reduce the contamination. • Forrest Creste would be subject to the Aquifer Protection Zone II provisions of the Aquifer Protection Ordinance upon its adoption. Those provisions would include: - Connection to a sanitary sewer system would take place within twelve months of effective date of the ordinance. 36 - Underground pipelines, storage facilities, and groundwater wells could be monitored at owner's at the discretion of the city's Water Works Utility. - If the Utility determines that an existing or proposed facility located in Zone II of an APA has a potential to degrade groundwater quality which equals or exceeds that of a permitted facility in Zone I, then the Utility could require that facility to comply with Zone I standards. - During construction: No temporary storage of regulated substances would be permitted on-site unless no other suitable site could be found (15 day limit). Use of petroleum products would be limited to only what is absolutely necessary. All refueling of vehicles would be done off-site if feasible; if not, then leakproof fuel containers would be placed on the ground. The contractor would comply with all applicable laws relating to disposal of hazardous substances and would be contractually responsible for ensuring that all subcontractors comply as well. ,• Construction of the proposed NE 6th Street would be planned in accordance with standards established by the City of Renton's Department of Public Works. • The drainage channel entering the site from 140th Avenue SE would either be retained as an open channel with enhanced planting along its edge or some form of energy dissipator would be designed at the outlet of the piping system to prevent erosion. An oil/water separator could be used to clean the stormwater before it entered the channel. • Hydroseeding, after clearing and grading activities, could be applied with careful attention to the manufacturer's instructions and with clear limits of application. An alternative method of seeding could be used in areas within 100 feet of the wetlands to prevent wind blown seed from entering the wetlands. Temporary silt fences could be installed to prevent seeds and nutrients from traveling to on- and off-site wetlands. • To the extent possible the plant list for the site would include native trees, shrubs and groundcovers. Invasive, non-native plants, such as English ivy and Japanese holly should be avoided because of their tendency to spread and alter the wetlands' functions. • Mitigation to address downstream drainage problems could include channel armoring of unstable section of the stream bank or detaining and releasing the project's post developed peak runoff rate for the 2-year, 24-hour design storm event at fifty percent of the predeveloped 2-year peak runoff rate for the 2-year, 24-hour design storm event. • Information regarding the positive attributes of wetlands would be distributed to new residents. Fencing could be designed which would not affect the visual aspects of the 37 i- wetlands as open space while at the same time keeping children and pets out and discouraging dumping. • A curbside recycling program would be developed to collect yard waste and to prevent it from being thrown in wetlands. Unavoidable Adverse Impacts Development of impervious surfaces would increase the total volume of runoff from the property. Mitigating measures including infiltration could reduce off-site flows to levels acceptable to the city and reduce the amount of urban pollutants in the stormwater discharged from the site. As with all development, runoff would still contain some level of pollutants such as fertilizer residues, some heavy metals and some oil and grease which is greater than existing undeveloped conditions and may have cumulative downstream impacts. 3.4 PLANTS Affected Environment The site is currently vegetated with dense, middle-aged fir, cedar, maple and alder (see Figure 7). It was logged many years ago as indicated by the mature vegetation growing on nurse logs and the dense shrub layer covering felled logs. An old logging road penetrates the eastern part of the site and provides access for trespassers. The northeastern portion of the site has been used as a horse pasture and consists of low groundcovers with a few alder saplings. A horse stable is present in this area. The tall second growth Douglas fir (Pseudotsuga menziesii), dominates the site providing a high canopy and resulting in filtered light penetrating the site. The successional alder (Alnus rubra) and big leaf maple (Acer macrophyllum) must reach for the light and consequently have few lower branches and leaves. A few young western red cedar (Thuja plicata) and western hemlock (Tsuga heterophylla) are also found on the site. There is limited mid-sized growth, including Indian plum (Oemeleria cerasiformis), vine maple (Acer circinatum), ninebark(Physocarpus capitatus), some sapling alder and big leaf maple, and serviceberry (Amelanchier alnifolia). The lower shrub layer is very dense and includes such typical northwest understory plants as salal (Gaultheria shallon), Oregon grape (Mahonia aquifolium), deciduous huckleberry (Vaccinium parvifolium), salmonberry (Rubus spectabilis), wild rose (Rosa spp.), and some blackberry (Rubus laciniatus) along the more exposed western edge of the site. The groundcovers include trillium (Trillium spp.), wild geranium (Geranium spp.), vanilla leaf (Achlys triphylla), Bleeding heart (Dicentra spp.), False Lily of the Valley (Maianthemum dilatatum), and many other typical northwest wildflowers. A number of ferns and mosses are also present. 38 r f • 1 I UPLAND PALUSTRINE UPLAND PALUSTRINE UPLAND PALUSTRINE UPLAND iSi::<�+Y: +4,ii(+i:+i4`;ni r ii. 'd 3Ci?l<` C 0 C C 1•, r .iii•C i::ii:: ?i ' • • iz.: 'D:z: ? s : 'id ++•**i::. al rr y a) W Wr C G' - • ` i:f?ii::y! ?35 % i:? : .-LL. : l0 y E co' • i.#,...,.>:<#:• H . v y O ./ 1 m NGW W Z � „Id , r::: '.V:./".:Iiiii 4 I W a r w a i ` h.ri 1 ;:: , Ilii,t...-:::0,111 , . Saturated �s y ' I Seepage zone ` ,, ><`. I a 1 Temporarily Flooded '; l `` , r -• 7111111406 f � �1 • 1/,'\1 + HIGH WATER Seaonaliy Flooded '�- I�►'.' AVERAGE WATER Semipermanently Flooded 1P -' 0... . . 1 1 Intermittently Exposed' �� Permanently Flooded 11 ' LOW WATER - • II C. hi 1 high canopy—441104�''�.M I► 5'� 1;akkr,,,.. mid-level- 1 itll2• . i 1r- J d.A i. l rJlf ^'f • 1+ I Fi ,. �0 ' 0/� ,� fuL Tl�'111\W�� 'ha l ) L. /!/ Ll�, Q� low — t u y < -*: ,act . /''I-, ,k 1u4,,.. , 4 c ctshrubs u. i. II ;and _ ,,r< . 'nkl•'� �. _ it ll 1g u d t , • . ' ,, - — 5W '�"J� covers.. k sill1 iii.1�N t'tiP,,n, . ,,.� . ; g.- r = ^1 i -- t-.',r -, snag low shrub groundcover sapling nurse log mature tree tall shrub i , .T Forrest Creste Vegetation Diversity Renton, Washington I PACIFIC Figure 7 - 39 The site exhibits both horizontal and vertical diversity. Tall trees, snags and nurse logs are spread throughout the site. Filtered light provides ideal conditions for a variety of groundcovers and shrubs. There are varied sizes and good layering of vegetation as well. Tall trees, mid- sized saplings and shrubs, and low shrubs and groundcovers provide vertical variety (see Figure 7). Vegetation specific to the wetland areas is described in detail in the Wetlands report (see Appendix C). Wetland 1 contains bigleaf maple, red alder, black cottonwood (Populus trichocarpa), Oregon ash (Fraxinus latifolia), western.hemlock (Tsuga heterophylla), red cedar (Thuja plicata), sword fern (Polystichum munitum), and devil's club (Oplapanax horridum) on its western portion and is dominated by bigleaf maple, western hemlock, salmonberry, sedge (Carex spp.) and geranium (Geranium spp.) on its eastern side. Wetland 2 includes creeping blackberry, evergreen blackberry (Rubus lasiniatus), Himalayan blackberry (Rubus discolor), and red alder. Buttercup (Ranunculus repens), large leaf avens (Geum macrophylim), bentgrass (Agrostis spp.), and Reed Canary Grass (Phalaris arundinacea) are also found. Environmental Impacts Proposed Action Under the Proposed Action approximately 10.9 acres (roughly 92 percent) of the site would be cleared. Additionally, soil compaction by large equipment during clearing and grading operations could cause damage to the root systems of remaining vegetation. The proposed site plan includes a trail system throughout the property and native vegetation could be used along and within the trail corridors. In addition, buffers would be left around the two wetland areas. Wetland 1 would be separated from development by 80-100 feet, part of which would be used for the proposed energy dissipator and part of which would be left in native vegetation. The energy dissipator would be located at least 50 feet from the edge of the wetland. Wetland 2 would be separated from the development by approximately 40 feet. A portion of this area would be designated as a native wetland buffer. The exact percentage of the wetland buffers that will remain as native vegetation can not be determined until detailed stormwater plans and clearing and grading plans have been prepared. There is a potential for stormwater runoff to be polluted with contaminants from cars, fertilizers, and/or pesticides used on the site. Non-native plants used in the proposed landscape plan could become established in the wetland buffer areas, altering the plant community composition. The native growth buffers could be subject to trampling and disturbance by Forrest Creste residents and pets. Trampling of the vegetation could reduce the herbaceous understory which could lead to erosion and sedimentation of the wetlands. 40 i 1 Alternative 1 - Site Plan B Impacts under this alternative would be similar to the Proposed Action although less vegetation would be cleared (approximately 10.3 acres or 87% of the site). Approximately 2,800 additional square feet of wetland and buffer would be left as natural areas. This proposal, however would have no trail corridors to retain native vegetation. Also, the perimeter buffer area is smaller than for the Proposed Action. The buffer area for Wetland 1 in the southwest corner of the site would be reduced to approximately 25-35 feet, and Wetland 2 in the northwest corner would be approximately 20-25 feet. The wetland buffers proposed under this alternative would be less than the 50-foot wetland buffers required by Renton's wetland ordinance. The reduced wetland buffers could result in increased human access to the wetland, and greater potential for non- native invasive plant species to become established in the wetlands. (Alternative 2 - No Action 9 i ,Under the No Action Alternative, if the site were to remain undeveloped, the plant communities would continue to alter and change according to their natural cycles. The conifers would, over a period of many years, come to dominate the site. The plant communities would be impacted 'in limited areas if people continue to dispose of trash on the site. If the site were to be subdivided and developed as a single-family neighborhood there would be clearing. Clearing ,land grading plans would be subject to SEPA review at the time of plat application. Mitigation Measures • Native vegetation would be retained in the two wetlands and within a portion of the buffer zones around them. Flagging these areas prior to,beginning construction activities would prevent damage from heavy equipment. Monitoring would be performed by a wetlands biologist. • To the extent possible native vegetation would be retained within the trail corridors and the buffer area around the perimeter of the property. • Vegetation and tree removal would be done in accordance with the City of Renton's Land Clearing and Tree Cutting Ordinance. • Native evergreen'trees could be planted along the northern, eastern, and southern edges of the property. • Hydroseeding would be used to create lawn areas. Careful application of this seeding technique would be needed to prevent the nutrients and seeds from blowing or washing into the nearby wetlands. • Non-native plants which can be invasive, such as English ivy, would not be used in the landscaping plan. To the extent possible, native plants would be used in the landscape design. 41 I ' I�I Unavoidable Adverse Impacts The diversity and numbers of existing plant species would be reduced because of the extensive amount of clearing proposed for the site. 3.5 ANIMALS Affected Environment Burrows of many small animals were found throughout the site and song birds associated with a forested environment were also evident. Snags, burnt and hollow logs, nurse logs, varied groundcovers, shrubs, saplings, and mature trees as well as the high canopy layer indicate that this site provides good habitat conditions. It provides a variety of horizontal as well as vertical structures (see Figure 7). This diversity of vegetation provides cover and space for wildlife. The dominant forms of wildlife in this area are birds and small mammals which can co-exist with urban areas, i.e., rabbits, mice, and a variety of song birds. Deer and mountain beavers probably also use the - site, as the properties to the east are undeveloped and provide additional forested habitat. The wetlands on the site provide additional habitat for various wildlife species. Wetland 1 provides seasonal drinking water for the wildlife in the area. The more mature deciduous trees such as red alder, black cottonwood, and Oregon ash supply numerous niches for perching birds. These large trees may also be used by larger birds such as hawks and woodpeckers. This wetland provides a moderately high value as wildlife habitat, and is only limited by its close proximity to Duvall Avenue NE. Wetland 2 has a low value for wildlife habitat. Its small size and surrounding developed landscape provides little opportunity for use by mammals. Small song birds may inhabit the shrubby wetland which is being colonized by red osier dogwood. This shrub provides food and cover for small bird species. Environmental Impacts Proposed Action Under the Proposed Action, the removal of vegetation for clearing and grading activities would reduce the habitat values of the site. Planting of ornamental trees and shrubs for landscaping would occur. In areas without native plants, the natural habitat would be lost. Snags and dead trees which provide cover and food supply would also be removed in the developed area. However, native vegetation would be retained in the trail corridors and perimeter buffer area as much as possible. The value of the wetlands for wildlife habitat would decrease as a result of the proposed action. Most wildlife species that require wetlands for some part of their life cycle also rely on uplands for survival. With the marked decrease in upland habitat, many species will be forced to move 42 to another area. The wetlands would primarily be used by more opportunistic, urbanized species of animals such as song birds. Human activity and family pets tend to drive away indigenous wildlife. Displaced wildlife usually cannot compete, so there is a decrease or elimination in population, depending on the ability of the species to co-exist successfully in urban environments. Alternative 1 - Site Plan B Under this alternative, impacts to animals would be slightly reduced because of the additional 2,800 square feet of open space in the southwestern corner of the site. however, impacts to wetland wildlife species could be greater than those in the proposed action because the wetland perimeter buffers would be reduced. The smaller buffer could subject the wetland wildlife ,species to greater disturbance from the adjacent development. Alternative 2 No Action ; The No Action Alternative would preclude any alteration of the habitat on site as long as the site were to remain undeveloped. However, because of the strong likelihood of additional ;development in the area, the interior and the borders of the.site could be affected. Should the site be developed as single-family housing, wildlife would be impacted by clearing and grading for homes. Additional impacts would occur after occupancy as people and their pets tend to idisturb habitat features. Animal species that have adapted to urban environments, such as ;opossums and raccoons, would be able to exist on the site. Mitigation Measures • Wetlands would be retained and protected. • Appropriate buffers would be retained along the edges of the wetlands. • Wider perimeter buffers could .be retained to increase the habitat value of the site. • Vegetation removal would be done in accordance with the City of Renton's Tree Preservation Ordinance. • Native plants, especially those which produce berries, could be used as much as possible for ! j the site's landscaping. • Buffers around wetlands would be fenced to prevent children and pets from disturbing the animals living in those areas. • The proponent could prohibit pets within the proposed apartment complex. 43 Unavoidable Adverse Impacts There would be loss of habitat and subsequent loss of wildlife on more than 87 percent of the property. Species diversity would decrease as habitat is removed. Human activity and animals would tend to drive away small native animals in the buffer areas of the site. 3.6 NOISE Affected Environment As the subject property is presently undeveloped, there are no significant noise sources now on the site. Developed areas near the site create and are exposed to typical suburban noise sources including: traffic, children playing, occasional aircraft flyovers, power lawn tools, and other home maintenance equipment. Specific noise monitoring was not undertaken at the project site; however, general noise studies can be applied for the amount of noise which could be anticipated during construction and after occupancy. Noise level measurements are expressed in units called decibels (dBA) and are based on sound magnitude, frequency and duration. Decibels increase in a logarithmic fashion. More simply stated, an increase of 1 dBA is equal to a sound twice as loud. The standard measurement of the combined effects of sound magnitude and duration is known as the equivalent level of sound or Leg. Leg is the measure of total sound "averaged" over a given time period. The U.S. Environmental Protection Agency (EPA) has refined the concept of Leg to account for increased human sensitivity to noise during the nighttime hours (10 p.m. to 7 a.m.). The refinement is equal to a reduction of 10 dBA during the night hours and is called day-night level (La). Ldn is the most useful measure of general noise conditions. The EPA has established criteria for judging noise levels. The EPA criteria does not constitute a regulation or standard but is intended as a general guide to provide a margin of safety. They list an Leg of 70 dBA as a "hearing loss consideration". Environmental Impacts Proposed Action The proposed development would increase human activity and increase noise levels. The principal source of noise in residential areas is traffic, which is the case for the proposed development. The most significant increase in vehicular noise would be associated with a.m. and p.m. peak hour traffic. There would also be temporary noise impacts during the construction phase at the site. The noisy equipment usage can be divided into two types: (1) relatively stationary on-site construction equipment, and (2) transportation equipment moving to and from the construction site. 44 r i - I is The Renton Zoning Code, section 4-734(K) has provisions which do not allow continuous noise levels in residential areas to exceed a maximum of 70 dBA with adjustments for specific types and duration of noise. State noise regulations exempt noise generated by motor vehicles. Noise generated as a result of construction activity is also exempted between the hours of 7:00 a.m. and 10:00 p.m. There are several other sources which provide noise guidelines which are applicable to the proposed project. • The Federal Highway Administration noise abatement criteria recommends that Leg noise levels in residential areas do not exceed 67 dBA outdoors and 52 dBA indoors. • The U.S. Environmental Protection Agency(EPA)Region X guidelines recommend that for adequate speech communication, the Ldn noise level should not exceed 55 dBA outdoors and 45 dBA indoors. The EPA guidelines state that these levels are not to be construed as standards as they do not take into account either cost or feasibility. Under EPA EIS guidelines, a noise increase of over 10 dBA is considered serious and warrants attention. • The U.S. Department of Housing and Urban Development (HUD) considers an acceptable noise level for new construction sites to be one not exceeding 65 dBA for more than eight hours per 24-hour period. The increased construction noise levels, although temporary, represent significant impacts in terms of criteria cited. Significant reductions in construction noise are generally not considered feasible until quieter construction equipment becomes available. Because of the State noise limitations (WAC 173-60), no construction would occur between the hours of 10 p.m. and 7 a.m. In addition, the City could employ more stringent restrictions. Alternative 1 - Site Plan B Noise impacts would be the same as those from the Proposed Action. Alternative 2 - No Action As long as the site were to remain undeveloped, noise produced on the site would not increase over the existing levels. Should single-family housing be permitted on the site, short-term noise from construction would occur. This alternative would generate less noise than the Proposed Action due to fewer residents. Mitigation Measures • Building design and location could help to reduce noise impacts. The use of insulation, airtight exteriors, and thicker walls, windows and ceilings could all reduce interior noise levels. Adequate setbacks could also reduce the noise impacts inside residences. • Construction equipment would be properly maintained and muffled. 45 • Construction hours would be limited to coincide with the normal workday period. The City could limit hours/days beyond the existing requirements if impacts from otherwise allowed operations would be significant. • Noisiest operations could be scheduled near the middle of the day, and nearby residents should be notified whenever extremely loud work would occur. • Recreation facilities, service areas, parking areas, and children's play lot would be located near the center of the site to reduce noise impacts on adjoining neighbors. • Acoustically designed fencing could be installed to help reduce noises from the site. Unavoidable Adverse Impacts Traffic volumes associated with the proposal and other proposed development within the area would increase noise levels. The most significant impacts would be experienced by dwelling units located adjacent to the major arterials near the site. 3.7 LAND USE Relationship of Proposed Action to Plans and Policies The proposed Forrest Creste project is located adjacent to the eastern city boundary within the zoning and planning jurisdiction of the City of Renton. Properties directly east and north of the site are within King County jurisdiction. Land use designations and community development within Renton are guided by the Renton Comprehensive Plan which was initially adopted in 1965. The plan has been amended several times since adoption; the most recent version is the Comprehensive Plan Compendium adopted in March., 1986, on which this analysis is based. A new Comprehensive Plan is being developed at this writing. Many of the policies in the current Comprehensive Plan are related directly or indirectly to the Proposed Action. A detailed analysis of City of Renton planning policies applicable to the proposed project is contained in Appendix G. In addition to general elements, the Plan also contains more detailed policy statements for each planning subarea of the City. The site is located in the northeast Renton planning subarea which is governed by the Northeast Quadrant Comprehensive Plan. The Forrest Creste site is directly adjacent to the planning jurisdiction of the Newcastle Community Plan, which is a subarea of the King County Comprehensive Plan. The Newcastle. Community Plan was adopted by King County in 1983 and will updated in the next two years as part of the requirement of the Growth Management Act. The portion of the Newcastle planning area adjacent to the site is known as the East Renton Plateau Subarea. 46 • I � City of Renton Comprehensive Plan The City of Renton Comprehensive Plan (CRCP) is a written statement of community goals and policies related to a variety of elements such as land use, housing, transportation, parks and recreation, and natural environment. The Plan also contains maps related to land use, community facilities, circulation, and implementation objectives. Figure 8 illustrates the land use for the site and surrounding area as designated in the Plan. . A number of the goals contained within the Comprehensive Plan have significance for the Proposed Action. They include: Environmental Goal - includes objectives and policies that would encourage balanced development, preserve open space, retain natural vegetation where possible and provide for adequate stormwater management. Urban Design Goal - includes objectives and policies that would encourage development of land in a timely logical to ical manner and use attractive, low maintenance landscaping for buffering and screening. Residential Goal - includes objectives and policies that would create/maintain sound viable , neighborhoods; allow only well designed, constructed and maintained dwellings and base density on natural features, character of the area and availability of public facilities. Appendix G includes a detailed discussion of specific Comprehensive Plan goals, objectives and policies and the proposed development's relationship to them. Renton's Comprehensive Plan designates approximately 30 percent of the proposed Forrest Creste site as Low Density Multi-Family. The remaining 70 percent is Medium Density Multi- Family (see Figure 8 for location). The Plan defines the Low Density Multi-Family Residential designation as a classification for attached single-family dwelling units, townhouses, mobile home parks and two-family dwellings ranging in density from 6 to 15 units per acre, and related compatible uses. Medium Density Multi-Family Residential is defined as a classification for medium scale multiple family residential uses, such as apartments, townhouses and condominiums, ranging in density from 12 to 30 dwelling units per acre. Compatible non- commercial uses of similar size are also appropriate in special circumstances under this land use designation (CRCP, page 27). In general, the intent of the Comprehensive Plan (Housing Density Objective, Policies 4 and 5) - is for the Low Density Multi-Family Residential and the Medium Density Multi-Family designations to act as a transition between single-family uses and more intensive residential and/or nonresidential land uses. In the case of the proposed Forrest Creste development, these two land use designations are intended to act as a transition between the existing single-family neighborhood to the north of the site and the mixed use community planned for the vacant area south of the site. This planned community includes commercial and office uses and multi-family housing and extends along NE 4th Street between the power lines and approximately 144th Avenue SE. 47 ,, • I 1 '..!!..'.-.'."ir.•';,:,.::q-.:. ,.. „I.l1iririv.,.90040000 --rn•—•— • Legend 1-405 s .n gle Family Commercia 7 _ l • \ E:1 PA ..,... Low Dueitni.eFRaymily '' , Office/Office Park Medium Densit.& :::::::::=1 Public/Ouael-Public > . :4::•:••••• mm•-•• . ..,.1 ami F—" *.:...:.:.:. .. ....::-.. ....,-.-?.: , ri O III tilitAlt:::..t.:::::., : ,„.t.N.. r•—• High Den6Itif Ej Light Industrial 1 O % :::1:•:•:-: .9,..:c.! IC' :'''...cilio .:"-:•:.:- V ;'•'..:.'.. ,. . 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A . ----- ••••••••:•:::::::::::::::,:. •• -ri-!.,i'i',0:9'0.'" •• • •do••4' '..tr,46!cl':'''• -:MIL ..',.vi,;,; °%.>s ‘ . 9:2j.. .-:-:-:•: :.•:•:It Al •ec°0°)°:.iN .p,-,•,(..,•i,-. ,t,vi,%,. s's _... ... .-.-... , 1 0000• , ... ...iv- 1 0o0ocp.o.• .... •0000. \ '.;;,o"C'..1'':"'"• ,.':1•3'd -et,".''%'''.',''•v ' ih,:1;,j,$...:,...., :::::..i* •• rk',I::i';',:..Ci;‘'..li.1..‘7:r,i.3-:;.,',',••••th.n,',Ie•0•.,, '''4a, c''cbc''... /frk '7 1:::.•:f 1.:;••:••••I:. 1.'....,•.9.,•••• PO .•...,r)-.4 s.,..° . . _0 Forrest Creste • Renton, Washington Designated Land Use : PACIFIC A Ei . Comprehensive Plan Not to Scale N 48 Figure 8 . , Since the Comprehensive Plan supports medium density and low density multi-family residential uses as a transition from single-family areas to office zones, from a zoning perspective, the proposed rezone associated with Forrest Creste would be consistent with these objectives. The proposed site plan is less consistent with the Comprehensive Plan because it includes only 20 percent of the property in low density multi-family units rather than the 30 percent indicated in the Plan. The Housing Density Objective of the Comprehensive Plan (see Appendix G) includes a group of policies designed to provide a transition in density between single-family uses and other residential and commercial uses, and to provide a gradual change in the intensity of uses and associated activities. Specifically policies 4, 4a and 5 under the Housing Density Objective state: "Single-family dwellings should be buffered by low density multiple family uses from more intense uses; Medium and high density single-family uses should be considered as an alternative to low- density multiple family uses in buffering single-family areas from more intensive residential or nonresidential zoning and Medium or high density multi-family dwellings should be a buffer between low density multi-family residential and more intensive uses." (CRCP, page 15) The proposed project indicates that a row of townhouses (four to six attached dwelling units per structure) will be located on the north boundary of the project. These units would occupy approximately 20 percent of the site. The townhouse units are separated from the high density traditional apartment units by approximately 60 feet of paved area that includes a driveway and parking. Better transitional mechanisms that would be more attractive and provide an improved quality of life might include the location of medium density units between townhomes and apartments, additional landscaping and/or open spaces. Mitigation opportunities are discussed later in this section (see Mitigation Measures). The townhouse units are separated from low density single-family areas adjacent to the site by a landscaped buffer that ranges in width from 10 feet to 35 feet. While this buffer provides some separation between uses, the Forrest Creste development could be made more compatible with existing uses by providing better transitional mechanisms (i.e., introducing medium and/or high density single-family uses, reducing the number of units and shifting them to the interior of the site, orienting the higher density units toward the interior of the site, introducing additional landscaped buffers or open space). The Comprehensive Plan requires proposed development to have adequate public utilities and services prior to development. The adequacy of services and facilities that would serve the proposed development is reviewed in more detail in Sections 13.13 and 13.14 of this document. 49 _I City of Renton - Northeast Quadrant Plan The Northeast Quadrant Plan covers the area of the City north of the Cedar River and east of the I-405 freeway. The Plan provides for an increase of 12,750 persons between 1978 and 1990, but acknowledges that current service and utility systems are not yet capable of accommodating full development under the Plan. The Plan encourages logical and timely growth progressing from west to east. It further states that the distinction between lands which are "potentially appropriate" for a change in land use and sites which are "ready now" is important. The Plan lists a number of policies which provide guidance to the City Council and Hearing Examiner to make the distinction between such lands. Three policies apply to Forrest Creste: • Vacant land surrounded by developed land should be developed first. I � • Land with adequate public facilities should be developed first. • Development should be compatible with future uses in the vicinity. The Plan encourages the use of multiple family residential uses as buffers between commercial uses and less intensive uses. As previously discussed, the intent of the rezone would be generally consistent with this objective but the proposed site plan is less consistent with the intent of the Plan in that better transition between very low density single-family land uses and higher density, more intensive multi-family uses could be achieved by using additional transitional mechanisms (i.e., higher density single-family units, lower density multi-family units, more landscaping, open spaces). The Northeast Quadrant Plan encourages the development of a 60-acre business park along NE 4th Street between Union Avenue NE and Duvall Avenue NE (immediately south of the Forrest Creste site). Adjacent land uses were expected to be re-evaluated upon development of the office park and community retail center in this vicinity. While these activities have not yet been fully developed, the rezone associated with the proposal would be consistent with the Plan's intent. The Proposed Action is consistent with the intent of the subarea plan. Public services currently exist or could be provided (by the applicant and/or the city) to serve the proposed development. In the areas where services are not currently available, they could be more readily provided if additional development were approved and constructed (i.e., the Orchards and/or additional residential development in adjacent King County). King County Comprehensive Plan 01985) and Newcastle Community Plan (1983) The King County Comprehensive Plan contains policies directing County decisions affecting growth and land development. The County Plan is comprised of three parts including: the Comprehensive Plan, community plans for local subareas, and functional plans for public facilities and services. The Forrest Creste site is located adjacent to the western boundary of the Newcastle Community Planning Area, which includes the East Renton Plateau. 50 The King County Comprehensive Plan designates the East Renton Plateau as an "Urban Area". The Plan encourages residential and employment growth within these areas to provide for population growth, economic opportunities and community diversity in patterns that protect environmental quality and aesthetic features. Most commercial facilities will be located within these areas, and a wide range of housing densities will be provided. Overall density should ultimately be high enough to support transit and other urban services (8 dwelling units per acre). The Plan also requires that urban facilities and services be in place or can be reasonably provided before growth occurs. The Newcastle Community Plan indicates that the land use adjacent to the east boundary of Renton should be low density single-family (2-3 dwelling units per acre) to moderate density single-family(4-6 dwelling units per acre). This designation was established because sewer and water facilities in the area have not yet been expanded to support higher levels of urban development. The Newcastle Plan also indicates that Duvall Avenue NE should be extended to the south to connect to the Renton-Maple Valley Highway, and that Coal Creek Road should be extended south to connect with Duvall Avenue NE to provide a major arterial connection between Bellevue and Renton. According to the Newcastle Plan,Duvall Avenue NE is a portion of the Renton-Issaquah bicycle route. This is a Class II route which connects the Sunset Highway and NE 4th Street. The King County Comprehensive Plan and Newcastle Community Plan encourages urban development within areas that are designated for urban development and that are developing as such. The proposal is located within the boundaries of a city within King County's designated Urban Growth Area and is therefore consistent with policies to encourage urban growth in urban areas. Zoning The present zoning of the site is G-1 which is a low-density residential holding district allowing one dwelling unit per 35,000 square feet and some agricultural uses such as dairies and truck farming. This zoning is not consistent with the land uses envisioned by the City of Renton Comprehensive Plan. Until adoption of the Growth Management Act of 1990, a comprehensive plan was a guideline only; however, under the provisions of the new law, zoning must be consistent with the City's comprehensive plan. Cities and counties that are required or choose to plan under the Growth Management Act have one year from the adoption of an updated comprehensive plan to adopt or revise development regulations, including zoning, to conform with the approved plan. The rezone associated with the Proposed Action would make the zoning and the comprehensive plan designation for the Forrest Creste site consistent. The current zoning south of the site is also G-1. A rezone would be necessary to develop the business park envisioned in the Northeast Quadrant Plan. 51 West of Duvall Avenue NE the zoning is G-1, R-1, R-2 and R-3. The R-1 zone allows no more than six single-family units per acre. The R-2 zone allows development of a maximum of six single-family dwelling units per acre or 12.1 duplex units per acre. The R-3 zone allows medium density multi-family uses at a density of a maximum of 25 dwelling units per acre. Both districts allow institutional uses such as churches, schools and day-care facilities. Zoning on properties east and southeast of the site(within King County)is Suburban Residential 15000 (2-3 dwelling units per acre). North of the site is RS 7200 and RS 5000, both single- family zoning districts. Some small parcels of Neighborhood Business (BN, BR) provide for convenience retail uses at a neighborhood scale along NE 4th Street (see Figure 9). Annexation Lands within unincorporated King County adjacent to and east of the site are within the "sphere of influence" of the City of Renton. This means that the City may potentially annex portions of the area. Within this area, Renton reviews public actions or private developments under the jurisdiction of King County to determine if they are consistent with the City's Comprehensive Plan or will have impacts on the City or its residents. The City of Renton Comprehensive Plan does not presently contain any policies regarding annexations. However, annexation policies are being considered in the Comprehensive Plan revision. Under current Washington State laws, there are three main types of annexation. The first is annexation of large urban areas and is initiated by either the City or local residents. It is subject to voter approval. The second is annexation of smaller urbanized areas and is initiated and approved by local property owners with consent from the City. The third is annexation of small areas of vacant land in the process of being developed., Local property owners also initiate and approve this type of annexation with the consent of the City. All types of annexation require the approval of the King County Boundary Review Board and the City Council. Under the Growth Management Act annexations can only occur once a year. -- i Future annexations within the area surrounding Forrest Creste would be subject to the annexation policies and criteria currently pending under the Comprehensive Plan revision. Currently when an area is annexed into the city it is zoned for single-family residential development regardless of its comprehensive plan designation. Development of any other type of use requires a rezone. Under provisions included in the GMA, zoning on future annexations would have to be consistent with the comprehensive plan designation. Future City expansion will be governed by the Urban Growth Boundaries (UGB) which will be established as part of the Growth Management Act. The UGB will be designated by King County with input from affected cities. During the last ten years, 16 annexations to the City of Renton have occurred on the east side of the City (see Figure 10). The Cascadia Annexation, 107.3 acres, which became effective on July 8, 1981, included the Forrest Creste site. The development of Forrest Creste is not anticipated to influence future annexations in any way since the property has been within _ Renton's boundaries for many years. 52 • 02 i, 'N.E. 10TH_ST.' �..� • l Foy L��� Priiil h-- u.; R-1 • alb , I IA R-1 "0` i RS 7200 I I > R&00 'IT1 .. . ±! KIWANIS •R-1 I I- w' ' e ▪ . , d PARK _ a Z-z- R-1 HONEY DEW i' m,i1 ELEMENTARY SCHOOL ? RS 7200 ,all R-1- , a76 _ R-1 /.,�,� .�• tITsT „ I . l ▪ ' ` 1 15000 , R-2 A 4 R-1 R-21 I I Proposed ti—�. -�_ -. • W' ,.,,,,.I, —in Site; 1-' - - _ el i Di=N...fr.:, vv = I" � L._ - R-3 w . git-'▪ :. •• ^� G-1 .. I ..;;� j 15000> .-- R-1 ' ..--. . .. i v---�-I° a . - R-11 � - °z = � R-2 II - . - 14. - z=T PUD-081-84 _ ' /�_11 ..,..v.rit • R-3 w �.1 •--.-i -I R 1 > RD 3600 _Q. . (>-- a R-3 I W _ I II G-1 > r a z I B 1 1 Z co QI I I c—.B-1 . o " �1 s. 1FILI 0•1�1 .1 .,• N.E. 4TH ST. 1 ..1 • 1 BR- BN ` S.E. 128TH ST. 1 .. J o o-P 111 N-P -P .I ` II B-1 --_ - 1 1 , G-1 - Legend RT-2400P 1 City of Renton 1 . ! 1 1 R-3 G-1 1 du/ac.,Agriculture W R-1 6 du/ac., Single Family R-3 ' P-1 R-2 12 du/ac.,Duplex SR 15000 1---- ' . - -- -- -SR 15000-R-3 25 du/ac.,Multi Family �-' ,4--� -- G-1 — -- - B-1 Business,Retail,and services 1 ,. I King County i 4 + . ^� - SR 1500 2-3 du/ac.,Single Family 1 RS 7200 6 du/ac., Single Family R-1 1 RS 5600 4 du/ac.,Single Family y I FPUD-053-865 _ I RS 5000 8 du/ac.,Townhouse a �R I BR-N Neighborhood Business/Residential I _1 BN Neighborhood Business 1 G-1 I 1 'Ire I1, -'y ' •U .-�\I RT 2400 Residential Townhouse RS 9600 I �' 1:4„ ..I•f„cp RD 3600 Residential Duplex tl Forrest Creste Renton, Washington Existing Zoning Map PACIFIC n Not to Scale N Figure 9 53 W , 2 I W I . s s :: .. 1 :A L410 - O ''> 1 N.E. 12TH ST. • 1 � N.E. Q iill 11 TH ST. , c �— I N E 1 ,'<'.405 ilikhlgrii Noir= _ , , `` .•E 118TH ST. • ui , AMMO Ati . .:;f:>i� Q �//:.:; ►70.5 P ROTO.SEDj , • ••• ei +1\1111 ‘1 ' / S1TE_ Irk*� Wl�NE.6TH ................................. .• . : < S E. 125TH ST. 1 4 N.E. 4TH ST. S.E. 128TH ST. Legend / 7 Annexations-Past Ten Years Passed ...i....,..:,.,,,.:,,::1 2/11/80 Lazetti .:.i.. %, A 2 6/8/81 Cascadia Renton C 3 8/24/81 Union Avenue 4 5/7/83 Thomas 5 1/14/85 Scott T 6 10/16/85 Maplewood Golf Course 1 7 10/16/85 Dochnahl '' 8 1/29/86 Tibbles/Underwood 9 12/3/86 Tri-Delt 10 4/22/87 Ridgeview • ''-- 11 6/1/87 i r Heights 1 7 Sera 9 12 11/11/87 Ryder-Beil -13 11/25/87 Honey Creek I Maplewood 4 1 E an 1 6 9 88GolfCourseExpansion P y 15 1/23/89 Hudson .......::::::: 1J 16 6/4/89 Fetterl Failed %% 17 10/18/89 Fernwood • 12 1 MayPreservation of Area 18 / 8/89Valley Forrest Creste Renton,Washington Renton Annexation Map PACIFIC n . . Scale: 1" = 2000' N 54 Figure 10 Population and Housing J� According to the 1990 Census figures, the current population of the city of Renton is 41,688. Average annual population growth during the last nine years has been about 900 persons per year increasing to 1,500 persons per year during the last two years. The City has grown by approximately 34 percent since 1980.According to 1990 Census figures, the Renton had a total of 19,234 housing units. Single-family homes accounted for 9,545 units or approximately 49.6 percent of the total housing stock. Apartment buildings with five or more units comprised 37.6 percent (7,241 units) of Renton's housing. The remainder of the housing stock is comprised of 1,657 units (8.6 percent) of two-to-three-unit apartments and 800 units (4.2 percent) of mobile homes and other dwelling units. Based on research of city building and occupancy permits, the number of multi-family housing units constructed in Renton between 1980 and 1988 resulted in a seven percent of growth rate. Census figures indicate that in 1990 approximately 49 percent of Renton's housing stock was occupied by renters, 46 percent was occupied byowners and 5 P percent was vacant. The vacancy rate for multi-family rentals was approximately 3 percent. This is slightly below the industry standard for a balanced market of 5 percent (Dave Eacret, Real Estate Economics, Personal Communication). l Very little vacant land zoned for multi-family uses remains within the present city limits. Of 1,500 acres of vacant land zoned for residential uses, 135 acres, or two percent of the land, is available for multi-family development. At the present rate of development of multi-family units, this will be depleted within the next few years. ;YI Affected Environment The Forrest Creste site is located in the northeastern district of the Renton, adjacent to the city i�. boundary. This area is designated as the President Park/Honeydew neighborhood and is primarily single-family with substantial-areas of vacant land designated for single-family use. Commercial and multi-familyuses have developed ped on the major arterials. Adjacent areas to the east, in King County, are designated low-density residential or rural. Properties that share a common boundary between Renton and King County are included in the Urban Growth Area under the Growth Management Act. It is anticipated that provisions of the GMA will result in new designations/regulations related to density for these areas. King County Community Plans are currently being revised and final decisions related to land use are } anticipated to be completed in time to meet the state mandated deadlines (i.e.,July 1993). The majority of the housing in the neighborhood was built during the 1960's and is of good quality. Several large properties to the west and south of the site remain vacant although a t II major development is currently planned for the site immediately west of Forrest Creste across Duvall Avenue NE. This mixed-use development, known as The Orchards, plans to build 275 apartments, 68 townhouses, 121 single-family units, 28,000 square feet of office/commercial space, and recreational facilities. The anticipated population of the Orchards development is 898 residents. 55 .,lb Immediately north and east of the Forrest Creste site are several small subdivisions with lot sizes of approximately 15,000 square feet. Some convenience businesses are located south of the site at the intersection of NE 4th Street and Duvall Avenue NE. Several blocks to the west on NE 4th Street there is a community business center that includes a large supermarket and other convenience uses. Community facilities and institutions in the vicinity include the main campus of Renton Vocational Technical Institute and Hazen High School. Environmental Impacts Proposed Action t ' Comprehensive plans indicate that the proposal is located in area where urban growth is planned and encouraged. The development of higher density multi-family housing does not therefore have an environmental impact in terms of altering planned land use patterns. In fact, the supply of vacant land zoned for multi-family uses within the City.is nearly exhausted. Designating the site for multi-family uses is consistent with the comprehensive plan's objectives for maintaining a supply of land for this housing type in an area with existing or planned services. I% a The development of Forrest Creste would provide approximately 200 dwelling units on 11.9 acres or a net density ratio of 17 dwelling units per acre. Subdivisions adjacent to the site both in the city and county are developed at approximately 2-3 dwelling units per acre. The proposed 17 dwelling units per acre is a significant difference in land use density. �` a Impacts to land use are both localized and cumulative. Multi-family buildings and structures generate higher traffic volumes and greater human activity, due to higher population densities. The most direct impacts of the Proposed Action would occur on the north and east boundaries of the site where it abuts residential subdivisions. The Proposed Action would have more people per acre than the existing residential neighborhoods. Because of the higher concentration of people, more activity would be generated both inside and outside the site. There would be increased traffic (about 1,235 trips daily) and pedestrian movements, as well as more service and utility vehicles entering the neighborhood. As envisioned in the CRCP, a pattern of higher density land uses would be established along Duvall Avenue NE, where one does not presently exist, as well as along NE 4th Street. The numbers of automobiles, delivery and service vehicles, pedestrians, and cyclists within the area would increase proportionately with population growth. These increases would result in an increased level of human activity within the neighborhood as well as increased levels of noise and movement associated with these activities. However none of these impacts are anticipated to be significantly adverse. The cumulative impacts of this project and The Orchards would change the existing character of the neighborhood from semi-rural to urban with a corresponding loss of natural vegetation and open space. With development, even including retained plantings, new landscaping open spaces and other amenities, the neighborhood would have the appearance of a higher density, 56 mixed-use area rather than a single-family neighborhood. As with any development of the site, there would be some loss of privacy for existing residential subdivisions near the site whether real or perceived. Increased noise and activity would occur as a result of any development. Although there are f varying levels of tolerance for changes of this type, it is likely that existing residents would perceive a difference in their living environment. However, changes in residents living environment would occur with any type of development that might occur on the site. It The proposed Forrest Creste project would house approximately 354 persons at full occupancy. This estimate is based on 1990 Census information for household size and is summarized below: s ER.:.:OF ::.: : : PERSONS:;PER 1 2.67 2 2.20 3-4 2.08 5-9 2.04 10-19 1.72 ii 20-49 1.74 50+ 1.65 * Source: 1990 Census of Population by Place-Profile 8 Cumulative impacts from additional housing development occur incrementally as population growth consumes capacity in existing municipal systems, facilities and services. Budgeted expenditures for operating costs include general government, public works, public safety, health and human services, and recreation. Alternative 1 - Site Plan B Activity impacts and other cumulative impacts from occupancy of the units would be similar to the Proposed Action. Population growth impacts resulting from this alternative would also be similar to the Proposed Action. ii Alternative 2 - No Action This alternative would allow development of single-family housing under the present zoning which is G-1. Development of housing at densities of one unit per 35,000 square foot parcel and other semi-rural uses would not be consistent with the planned development pattern envisioned in the Comprehensive Plan which encourages multi-family development as a transition 57 to office park development to the south (along NE 4th Street) and as a transition to single-family uses to the north and east. This alternative is however, consistent with existing single-family residences to the north and east. ,Zoning at the G-1 density does not provide an adequate supply of land for affordable single- {family housing, or an efficient use of available urban services within a designated urban growth 'area. 'The No Action Alternative would allow development of one dwelling unit per 35,000 square feet or approximately 14 dwelling units. Estimated additional population growth would be about 37 ;persons. This increase in population would not be expected to have a significant adverse impact !on services or facilities. The few dwelling units that would result from developing the site at the G-1 density levels would not result in efficient development, produce affordable housing, or produce a significant number ;of new single-family housing units needed for expected population increases. Very low density (development (at one dwelling unit per 35,000 square feet or less) in areas planned for higher ,density urban growth increases urban sprawl and does not provide adequate population density Ito support public transportation systems. 1!The City of Renton Comprehensive Plan designates the Forrest Creste site for higher density urban uses. It is likely that the site will also be within the Urban Growth boundaries established �. 'Iby the Growth Management Act (GMA). Development of 14 single-family homes would not be consistent with the intent of either. Possible Extraneous Impacts During scoping, neighboring residents expressed concerns that the value of their properties ,would be decreased due to the location of multi-family housing within their neighborhood. Impacts on residential property values from the Proposed Action would not be expected to be significant because of the steadily increasing property values in the region, as well as the City of Renton, caused by housing demand. Some impacts, such as reduced sales prices or additional time required to sell single-family properties adjacent to the site, may occur (King County Assessor's Office, personal communication). Property values in the area including and surrounding Forrest Creste could increase as a result 1! of the higher densities allowed under the GMA. Increases in property value could be realized by subdividing larger existing lots to allow for in-fill. Mitigation Measures • Townhouse units located on the northern edge of the property would provide a degree separation between adjacent single-family homes to the north and apartment units to the south. They would be oriented in such a way so as not to be obvious from single-family homes to the north. li r 58 • A wider area of natural vegetation could be provided to act as a visual screen and greenbelt between the proposed units and existing single-family homes to the north and east. A wider landscape buffer could provide a better transition zone for adjacent single-family uses and a more attractive environment for on-site residents. • Bulk and scale of buildings could be reduced by construction of smaller buildings or other reductions of density. Or conversely, larger buildings could be more tightly clustered and tr moved further to the south to provide greater distance between more intensive land uses and single-family uses to the north and east of the site. 1 • In order to comply with GMA, Renton would establish municipal service standards for existing population and require mitigation fees for services directly impacted by population growth. Unavoidable Adverse Impacts Any construction on the site for urban uses would result in some permanent loss of existing open - ' space and natural vegetation. The site would be permanently transformed from an undisturbed natural area to an urban neighborhood. 3.8 AESTHETICS Affected Environment The Forrest Creste site is undeveloped and vegetated with a heavy growth of native plants. From Duvall Avenue NE and the adjacent subdivisions, the site appears to be a forest characteristic of the Puget Sound region, prior to extensive logging and urban development. If all permits are granted for Forrest Creste and/or the adjacent Orchards development is constructed, the appearance of Duvall Avenue NE would change from forested to urban. The site's aesthetic values are primarily related to its natural features. The existing forest provides a natural greenbelt buffer between the urban arterial and single-family neighborhoods to the north and east, blocking visibility into the neighborhoods, and reducing the closeness of other urban activities. Environmental Impacts Proposed Action r• The Proposed Action would preserve some native vegetation (approximately 8 percent)including on-site wetlands, perimeter buffers and a trail corridor. In order to support development, most of the site's native vegetation (approximately 92 percent) would be removed. The proposal includes landscaping plans that would use supplemental plantings of native and ornamental vegetation to soften the appearance of the site and to provide a buffer between roadways and nearby residences. 59 1 r Perimeter buffers of native vegetation and planted trees are proposed. They would range in .width from 10 feet to over 100 feet and would include both of the site's wetlands (see Figure 2). Along the eastern and southern borders of the site the buffers are typically 20 to 25 feet ' wide and mostly abut parking areas. One of the site's two wetlands is located in the southwest corner. The wetland and its associated buffer range in width from 80 to over 100 feet. The remainder of the western perimeter buffer 'ranges from 25 to 30 feet except in the northwest corner where it widens to 40 feet to accommodate the site's second wetland. The buffer along the northern border separates proposed two-story townhouse units from single- family homes and ranges from 10 feet to 35 feet in width. In addition to the perimeter buffer, the townhouses in the northern portion of the site are separated from single-family homes by ;approximately 10 feet of lawn. The orientation of the buildings in the Proposed Action provides a degree of privacy for single- 'V ;family homes located to the north of the site. Views of the larger three-story multi-family units are partly screened by 40-foot wide, 100-foot deep landscape buffers between the townhouse units (see Figure 2). Where the townhouse units are not separated by landscape buffers, single- family homes would have a view of parking areas and/or the trail corridors which would be screened by the perimeter buffer. The perimeter and wetland buffer areas and the proposed trail corridors would retain some site integrity with regard to its natural, wooded appearance. The natural vegetation that would 'remain in the wetland areas would partly screen the site from Duvall Avenue NE. The overall visual character of the site would change from natural woodland to urban residential. This land use would be dissimilar from the adjacent single-family development to the north and ',east which contain minimal paved areas and lower-scale buildings. The appearance of the developed site from abutting,properties would, however, be generally screened by the perimeter buffers. The Forrest Creste site could be similar to the proposed Orchards development, located across Duvall Avenue NE, and to the uses that are envisioned for the property to the south. Alternative 1 - Site Plan B l' Since the density and type of buildings proposed in Site Plan B are very similar to those in the Proposed Action, visual impacts of the two alternatives would be similar. In some areas Site Plan B proposes perimeter buffers that are somewhat narrower than the Proposed Action. For example, the buffers on the northern border range from 10 to 20 feet and those on the southern border range from 0 to 10 feet with 10 to 25 feet of lawn. According to City of Renton, Ordinance No. 4346, Ch. 32 ("Wetlands Management"), the wetland buffers proposed in this alternative would be unacceptably small. The open space area proposed for the southwest corner and extending in to the center of the site would afford some visual relief for adjacent residents. The north-south orientation of the buildings in this option does not provide adjoining single- family residences with as much privacy as does the Proposed Action. The location of the 60 } 4 1 ' recreation center further north added to the orientation of the buildings, would provide single family residences with views of more intensive uses than would the Proposed Action. ` Alternative 2 - No Action Without development, the site would remain in its natural condition. Development of the site under existing zoning would allow subdivision and development of single-family buildings, driveways and landscaping. Part of the native forest would be cleared to allow construction and landscaping, but some trees could be retained. The appearance of the site would likely be that of a low-density suburban residential area with building density and size similar to those found in adjacent neighborhoods. Removal of additional natural vegetation would be at the individual I property owner's discretion. Mitigation Measures - . • To the degree possible, natural vegetation would be retained and dispersed throughout the - site, especially within the trail corridors. - • Natural vegetation would be maintained and augmented with supplemental plantings in perimeter buffer zones ranging from 10 to over 100 feet wide to visually screen more intensive development on site from adjoining uses. - • Buildings and landscape buffers would be oriented to screen views of large buildings from single-family homes. - • Height, scale and bulk of buildings could be minimized to be more consistent with surrounding low-density development. Conversely, larger buildings could be more tightly clustered and moved further to the south to provide greater distance between more intensive land uses and single-family uses to the north and east of the site. • Building materials and exterior colors that would visually minimize the bulk and scale of - buildings could be used. Unavoidable Adverse Impacts i,! The site would change from a woodland environment to urban residential as development occurs. 3.9 LIGHT AND GLARE Affected Environment ai The site is presently undeveloped, with no artificial light sources or surfaces that would create ce' glare on the property itself or on neighboring properties. The closest sources of light are from the streetlights, homes and vehicle headlights in the single-family neighborhood to the north of the property. The Orchards development planned to the south and west of this site would add 61 � I light at night and glare by day to the neighborhood. Headlights of cars traveling at night along Duvall Avenue NE also add illumination to the area. Environmental Impacts Development of the site would introduce artificial lighting from street lights, lights from/on buildings, and lighting in parking areas on the east side of Duvall Avenue NE. Movement of vehicles on the site at night would increase illumination in the surrounding areas from vehicle 'headlights. Some of this light would be discernable off-site. There is the potential for glare :from the multi-family units if they are painted light colors and are not effectively screened with vegetation. ;Alternative 1 - Site Plan B Impacts from this alternative would be similar to those of the Proposed Action. Alternative 2 - No Action ;No additional light sources would result from the No Action Alternative as long as the site "remains undeveloped. Should the site be subdivided and developed as single-family housing, .artificial light would be visible from the houses. Street lights and traffic would create light that would be visible at night. Mitigation Measures • A buffer zone of natural vegetation would be maintained between the proposed site and adjoining properties to prevent penetration of lighting and the potential for glare. • Natural vegetation would be retained as buffers around the two on-site wetlands and within the trail corridors. This would reduce impacts from light and glare from the very northwestern and the southwestern portions of the site. �f • Design, location and type of lighting could be such that the range of illumination and glare would be reduced while maintaining the desired level of light.• All lighting of streets and parking areas could be of the low-level, non-glare type. Unavoidable Adverse Impacts New sources of light and glare from the proposed development would be introduced to the east of Duvall Avenue NE as a result of human activity, particularly at night. 62 3.10 PARKS AND RECREATION r-, Affected Environment The Renton Parks System includes 17 neighborhood parks, six community parks, two sub- regional parks, the Cedar River and Springbrook trails, the Senior Citizen's Center, several recreational centers, a swimming pool, the Maplewood Golf Course and the Community Center. The City offers diverse recreational programs including activities for children, adults, senior citizens and people with special needs. At 8.2 acres of developed park per 1,000 residents, Renton is slightly below the national standard of ten acres per 1,000 population. The proposed site lies within the President's Park/Honeydew neighborhood. The 1984 Comprehensive Parks and Recreation Plan indicates that this neighborhood is served by Kiwanis Park. This nine-acre park includes one multi-use field, two tennis courts, one basketball court and one multi-purpose asphalt area. It also includes picnic areas, playground equipment and an activity building. The facilities are in good to very good condition. The athletic fields are fully utilized for organized sports but the passive recreational areas are not currently used to their full capacity (Renton Parks and Recreation Department, Randy Berg, personal communication). In addition to the Kiwanis neighborhood park, the proposed site is near three other park and/or recreation facilities: Hazen High School, Honeydew Elementary and Coalfield County Park(see Figure 11). Hazen High School has a total recreation acreage of 18 acres. It includes four } ; baseball fields, one football field, four tennis courts and one running track. Honeydew Elementary school has nine acres available for recreation uses. The school's recreation facilities include two baseball fields, two soccer fields and two outdoor basketball courts. Use of the school facilities by the general public is limited to non-school hours. Coalfield Park is a King County park located approximately 1.5 miles southeast of the proposed site. The park includes 12 developed acres of open space. There are two softball fields within the park which can also f be used as a football, soccer and/or multipurpose fields. A bikeway is proposed along Duvall Avenue NE by the City of Renton (Parks and Recreation Department). This is primarily intended to be a commuter route for bicyclists although it would have potential for recreational uses. The city is planning an extensive trail system for bicycles which would connect city parks and would tie into King County's trail system. '. The Parks Department is currently updating its Parks and Recreation Plan. That document is under SEPA review at the time of this writing. I P 63 ' L. N%------**--N I._ .1 . 1 , ,wT 0w J I _ I ^I— L 'l L_J i ES • : ui Q r N.E. 12TH5T. l 'r N EiT "Ti I N I �� \-- -L. r. -r-q - W `- E 1oT wiii i, - _ / . 6 1 -- --, S.E 118TH ST. (ow, Q 4Z. 121 ST ST. 1111111Mv :'�' PROPOSED I- 114111 �eZ 5 ' O N.E. 8TH ST. � ; : ;� .__ SITE � O j •f_ S.E. 125TH ST. Ti 4 7 ir al N.E. 4TH ST. J I S.E. 128TH ST. _ it J.....___I -- rl" Renton lettP vo 1 — �:_-1 0 t Legend � � i .._ — di ®Hazen High School ‘Wdlilli L_- - ®Maplewood Hts. Elementary School N � ' - t ® McKnight Middle School �---- ~' _ ®KiwanPs Park RIVER Mq,44, \I-i ® Coalfield Park ©Fire Station#12 yql<Fy �__ � --� —. 6 Fire Station#13 �. 0FireStafion#11 ' kit}, OO Police/City Hall Olg. i Forrest Creste MRenton, Community Facilities PACIFIC n Scale: 1' = 2000' N Figure 11 64 IJ� Environmental Impacts Proposed Action The Proposed Action would provide housing for approximately 354 new residents (including children and adults) who would require park space and recreation opportunities. Renton's Park and Recreation Plan includes a table of Park and Recreation Standards. Based on this table, the Forrest Creste project would have the following demands for park and recreation facilities: f i FACILITY DEMAND r Total Park Area 3.5 acres Playlots/Mini-Parks (on site) 0.09-0.18 acres Neighborhood Park 1.71-1.77 acres Community Park 1.77-2.82 acres Baseball Diamond 0.06 fields Softball Diamond 0.18 fields Football Field 0.06 fields Soccer Field 0.18 fields Tennis Courts 0.18 courts Basketball Courts 0.07 courts Swimming Pool 0.02 pools Golf Course 0.01 courses The Honeydew area of the President's Park/Honeydew neighborhood (this area includes the proposed site) is growing rapidly. It is a Park Department policy to provide neighborhood parks within a one-half mile radius of developed areas. The existing Kiwanis park is just over one-half mile from the proposed site. In addition, when all the proposed development in the immediate area of Forrest Creste is considered, there is a need for additional park space. The Parks Department is looking for future park sites within a one-half mile radius of Hazen High School. Funds to acquire park lands in Renton are obtained through impact fees from developers, in addition to or as an alternative to on-site recreation facilities. Currently, the Parks Department collects $150.00 per single-family unit and $175.00 to $180.00 per multi-family unit. The City of Renton provides funds to develop parkland once it has been acquired. Alternative 1 - Site Plan B Impacts resulting from Alternative 1 would be similar to the Proposed Action. 4r Alternative 2 - No Action The Forrest Creste site lies within an area where the Parks Department is looking for a park site. It could be a potential park site if it were to remain undeveloped. However, the cost of acquisition would most likely prohibit the site's development as a park. (Sam Chastian, Renton Parks Department, personal communication.) Should single-family housing be developed, there is the potential that roughly 37 residents would be added to the neighborhood and would make use of parks in the area. 65 Mitigation Measures • The Forrest Creste proposal includes a pool; recreation building containing a weight room, aerobics room, shower facilities, social room, kitchen; sports court for volleyball,basketball, or badminton; children's play area, all of which would provide for some of the recreation needs of its residents. • Property managers at the developed site could provide organized recreation programs. • The developer would participate in voluntary mitigation of between $175.00 to $180.00 per unit to mitigate for parkland acquisition necessary to accommodate new residents. • The Proposed Action would include a trail. Unavoidable Adverse Impacts ,;None are anticipated. 3.11 TRANSPORTATION This section addresses the transportation impacts that would occur from Forrest Creste. A 'traffic study is included as Appendix H. The traffic study follows the guidelines of the 'document Policy Guidelines for Traffic Impact Analysis of New Development, (1988), City of Renton. ;Affected Environment The proposed project is located in a residential area which is in transition from open space to suburban housing and commercial services. Future development is anticipated to occur at a higher density as King County and City have designated the site as an urban area. Local roadways are NE 4th Street, NE 3rd Street, and NE Sunset Boulevard which serve as major east-west arterial streets, and Monroe Avenue NE, Union Avenue NE, and Duvall Avenue NE serving as secondary north-south arterial streets (see Figure 12). To a lesser extent, the network also includes NE 10th Street, NE 12th Street, Bronson Avenue NE, and Edmonds Avenue NE. Table 1 lists the characteristics of the existing streets. Existing Traffic Volumes and Levels of Service Table 1 also shows current average daily traffic(ADT) for the major roadways in the study area. The roadways with the highest traffic volumes are NE 4th Street and NE 3rd Street, carrying approximately 30,000 and 30,400 ADT respectively. NE Sunset Boulevard is the third most traveled road, with traffic volumes of 22,400 ADT. Duvall Avenue NE, where the proposed Forrest Creste site is located, currently carries 7,000 ADT. L WL is 1 8 1 TABLE 1 - Selected Major Roadways In Study Area t-" �......199ft.Ae e.Da S e�eid:<;<:<: , NE 4th Street 5L 30,000...............................35.......... NE 3rd Street 4L 30,400 35 NE 10th Street 2L 8,000 30 NE 12th Street 2L 10,000 30 NE Sunset Boulevard 5L 22,400 35 Bronson Avenue NE 2L 5,000 30 Edmonds Avenue NE 2L 7,000 25 Monroe Avenue NE 4L 7,000 25 Union Avenue NE 2L 4,000 30 Duvall Avenue NE 4L 7,000 30 The intersections NE 4th Street/Duvall Avenue NE, NE 4th Street/Union Avenue NE, NE 4th Street/Monroe Avenue NE, NE 3rd Street/ Jefferson Avenue NE and NE Sunset Boulevard/Duvall Avenue NE are operating at a level of service (LOS) C or above (1990 traffic • volumes). LOS is a measure of the operational capacity of a roadway intersection. The level of service is given a letter designation ranging from LOS A (free flow of traffic with little or no delays) to LOS F (jammed flow of traffic with major delays). Level of service C describes operations with delay in the range of 15.1 to 25.0 seconds per vehicle at signalized intersections. The number of vehicles stopping is significant at this level, although many still pass through the intersection without stopping. The City of Renton has defined levels of service A through D as acceptable. Existing Circulation Most traffic in the study area is commuter traffic which is westbound in the early morning and eastbound in the afternoon. The points of origin for traffic are residential areas in King County and Renton adjacent to the city and county streets in the study area. A secondary pattern for commuters is northbound in the morning and southbound in the afternoon. The east-west movements are generally on NE Sunset Boulevard and NE 4th Street. The north-south movements are generally on Duvall Avenue NE which feeds traffic to Coal Creek Parkway. Motorists then travel to and from Bellevue, Kirkland, Redmond and surrounding areas. The east-west traffic is destined for central Renton and surrounding areas or uses I-405 to travel to points south. NE 4th Street and NE Sunset Boulevard carry larger volumes of traffic since there is no direct route south to the Maple Valley Highway, an additional east-west arterial. National trends and studies conducted in support of the Vision 2020 Regional Transportation Plan suggest that travel patterns are taking on a more suburb-to-suburb character, rather than a suburb-to-Seattle character. Some Forrest Creste residents may travel to Seattle via SR 900 67 C%. Co Not to Scale r� l 405 KNG COUNTY 4'�.o RENTON CITY LIMITS -� 'N - ri-- 1--. - ui z W L.....i. t ). Q 2 0 k �J� c F w N.E. 12TH ST. 5 r JNE PARK DR. r 1 ,oit N.E. —1 ti ST. LLi _w rt.] 10TH 1 2 z L_...... h N.E. < > 7TH ST. z z 0 g Z _ S.E.122ND ST. J ..fc` ,i A > PROPOSED c ' 1 SITE �2 N.E. 4TH ST. S.E. 128TH ST. cO : 3P0 91 a1 . LC i 11 )41) II I LI (F),, 1411- SR-169 f Forrest Creste Renton, Washington Major Roadways I PACIFIC 68 Figure 12 (Park Drive-Sunset Blvd.-Martin Luther King), however current travel times suggest that I- f- 405/I-90 is faster. 1 Traffic Accidents Accident frequencies provided by the City of Renton were taken from the report Traffic Impact Analysis for the Renton East Residential Development, (1989), The Transpo Group, Inc. The rates are based on an analysis of accidents occurring between January 1, 1986 through December yj 31, 1988. Average accident frequencies for King County are about 10 accidents per year on roadways; there are no figures available for annual accidents at intersections. Accidents on the roadways and intersections in the study area are about average for these types of facilities in King County. The intersection with the greatest frequency of accidents is NE 4th Street/Union Avenue NE with 10.3 accidents per year. Existing Public Transit NE 4th Street is served by Metro bus routes #111 and #147, and service is provided on Union Avenue NE by Metro Route #114. Metro assumes that the maximum distance a person would walk for a bus is .25 miles. Forrest Creste is located approximately 2,000 feet (approximately .38 miles) from the bus stop on 4th Street. While the bus stop would be convenient for most _ pedestrians, it would not be convenient for elderly and handicapped persons. The Renton Highlands Park-and-Ride lot is at the corner of NE 16th Street and Edmonds Avenue, about two and one-half miles from the site by driving on surface roads. This small lot is served by Metro routes #106 and #111. A larger park-and-ride lot, the Renton-Boeing Park- and-Ride, is located near the corner of Park Avenue N and I-405, about three and one-half miles from the site. While both lots are convenient to the site, it is likely that only a few motorists from Forrest Creste would use them. The travel patterns from new suburban developments tend ' to be suburb to suburb. The routes which serve these two park-and-rides tend to serve the. Seattle-destined market. The recent requirement for transportation demand management plans at major employers may provide subsidies and other incentives for Forrest Creste residents to use transit from these two park-and-rides. Environmental Impacts Proposed Action Generated trips were estimated using the guidelines of the Institute of Transportation Engineers - Trip Generation Manual (4th Edition). Trip distribution is the direction traffic will travel after leaving the proposed project site. The 24-hour ADT and the morning (a.m.)and evening (p.m.) r " peak hour trips were generated for the proposed Forrest Creste development. Forrest Creste would generate about 1,235 trips daily. There would be about 19 trips into the site and about 85 trips away from the site in the morning, for a total of approximately 104 a.m. peak hour trips. In the evening, there would be about 93 trips in and about 44 trips out for a total of approximately 137 p.m. peak hour trips. The distribution of traffic is discussed in detail in Appendix H of this report. j~, 69 • Impacts resulting from the proposed Forrest Creste project would affect the operational capacity 'of roadway intersections and existing circulation patterns. Using the City of Renton's guidelines from the document Policy Guidelines for Traffic Impact Analysis of New Development, a five percent increase in peak hour traffic entering a signalized intersection was determined to be the •threshold for analysis. The impact is calculated by adding Forrest Creste traffic to anticipated 1993 traffic. ;Table 2 indicates the signalized intersections that will experience a peak hour increase of five percent or more due to the proposed Forrest' Creste project. The Table also indicates the .intersection level of service (LOS) for the forecast year traffic with and without the Forrest Creste development. ',Table 2 indicates that the intersections of NE 4th Street/Union Avenue NE would drop to level '�!of service E in the p.m. peak hour for 1993 build conditions and would require mitigation. TABLE 2 - Affected Intersections _ 3 >INTER `><PROPOSEi)>::>::. , CT :::::::::;:::«:<::<>::>:>:»:>:>:>::::::<:>::::>:::>::: :» NE 4th St/Duvall Ave NE B/D C/D NE 4th St/Union Ave NE D/D • D/E NE 4th St/Monroe Ave NE B/C C/C NE 3rd St/Jefferson Ave NE A/B . A/B NE Sunset Blvd/Duvall Ave NE C/D C/D i Table 3 shows the anticipated 24-hour ADT traffic volumes for 1993 on the major roadways in ,the study area. The highest volumes would occur on NE 4th Street and NE 3rd Street (34,900 ADT for each street). NE Sunset Boulevard would still be the third most traveled road with traffic 22,400 ADT. Traffic volumes on Duvall Avenue NE would increase to 10,500 ADT. The traffic volumes for major roadways in 1993 without the project are given in Appendix H. 70 TABLE 3 - Projected 1993 ADT on Major Roadways, With Project ^ NE 4th Street 32,900 NE 3rd Street 33,500 NE 10th Street 8,700 • NE 12th Street 10,900 t' NE Sunset Boulevard • 20,000 Edmonds Avenue NE 7,600 Jefferson Avenue NE 2,200 • Monroe Avenue NE 7,600 Union Avenue NE 4,400 Duvall Avenue NE 8,500 • Circulation impacts associated with vehicular traffic were evaluated and it was concluded that traffic patterns would remain essentially the same. Traffic bound for Renton and other — developed areas to the west would continue to use Sunset Boulevard NE and NE 4th Street as major east-west corridors. Traffic headed for points north would use Duvall Avenue NE and continue north along Coal Creek Parkway. Traffic traveling to or from the south would tend to travel west on NE 4th Street or NE Sunset Boulevard, and then use I-405. Duvall Avenue NE,would be the roadway most affected, both in terms of added vehicles and the overall percent increase in traffic. Although traffic would flow at LOS C or better after completing the project, there would be more traffic turning and increased accident potential; these impacts can be offset, in part, by mitigation measures discussed below. The Proposed Action and the Alternative 1 Site Plan B would have a direct access to Duvall Avenue Northeast. There is an alternative for a connection to the proposed NE 6th Street. The "worst case" analysis would be if the NE 6th Street connection is not constructed. For this scenario, all generated traffic would enter and leave the site at the Duvall Avenue connection. Level of service was calculated for the a.m. and p.m. conditions, assuming that the Duvall ti' ' Avenue access to Forrest Creste is stop sign controlled and that the NE 6th Street connection is not constructed. In the A.m., all movements would have an LOS of A, except the WB left turn, which would have an LOS of D. In the p.m., all movements would have an LOS of A, with the exception of the WB left turn, which would have an LOS of C. These levels of service are acceptable for this project. The addition of the NE 6th Street connection would improve further the operation of the access driveways. • 71 Planned Improvements The City of Renton is divided into five transportation benefit zones (TBZ) for purposes of assessing development fees and managing transportation improvements. The Forrest Creste development was included in the East Renton Transportation Benefit Zone Study, (1989), CH2M Hill. The East Renton TBZ includes roadway improvements for which the developer could contribute mitigation fees. The cost contribution would be based on the proportion of trips 'generated by the Forrest Creste development to the total trips stated in the East Renton TBZ Study. Table 4 shows the estimated cost of the planned improvements and the estimated 11 k contribution by Forrest Creste to the TBZ. The percentage contribution is based on the percentage of trips contributed by Forrest Creste as a function of the total new trips that could ;;be generated in the future. According to the Benefit Zone Study, pg. 3-1, there would be 147,492 new trips generated by future development in the East Renton Zone. The proposed .action is anticipated to generate 1,235 new trips or 2.6% of the estimated cost of the project. STable 4 suggests a contribution of$153,580 by the developers of the Proposed Action. A bicycle route has been proposed along Duvall Avenue SE by the City of Renton Department ''of Parks and Recreation. This is intended to serve as a transportation corridor/commuter bicycle ;route to encourage this alternative form of transportation. The draft bicycle route document suggests that the route would be within the Duvall Avenue NE right-of-way. The document has not been adopted at the time of this writing. 1 Bus Routes and Park-and-Ride Circulation Metro regularly revises its service schedule, and recently upgraded its service to southeast King County. The construction of Forrest Creste would have a minor impact on existing bus circulation. Metro's next set of service plans has not been released, so it is difficult to predict how future service and Forrest Crest ridership could interact. There is adequate bus service for people who walk from the site, or are driven to a park-and- ride lot. It is not likely that residents of Forrest Creste would use either park-and-ride lot because existing transit service does not adequately serve the anticipated commute patterns. The increasing growth of employer-sponsored transportation demand management plans and transit subsidies may encourage more use of these lots by Forrest Creste residents. The impact of Forrest Creste on existing park-and-ride traffic and transit operations would be minor. i ✓ 72 r TABLE 4 - Planned Improvements and Estimate of Cost :;<::»::>:: imated:<:::<::: ::::::::<:<:: :::::<g- :.:;;:..�,sit:. :...: :. ::;::�stmated:;;:�.; lro verve .:.: :.i�.: ::: : ::.::.::::::::.nest::Creste:.; ;ontaiitioan :>:;;,: 9 2 • NE 3rd St - Sunset Blvd to Monterey Dr 539 14.01 NE 3rd St - Monterey Dr to Edmonds Ave 1,160 30.16 NE 3rd St - Edmonds Ave to Jefferson Ave 916 23.82 NE 4th St - Jefferson Ave to Monroe Ave 557 14.48 NE 4th St - Monroe Ave to Union Ave 1,430 36.92 NE 4th St - Union Ave to Duvall Ave 1,091 28.37 Edmonds Ave at NE 4th St 224 5.82 • 'Estimated costs are from The East Renton Transportation Benefit Zone Study(TBZ),(1989)CH2MHill,pg.4-7). Me proposed action is anticipated to create 1,235 new trips,or 2.6%of the total future trip®generated in the TBZ. The costs in this column are derived by taking 2.6%of the cost in the previous column. Emergency Vehicle Circulation Emergency vehicles include fire engines, police vehicles, and ambulances. The site is located near Fire Station #12. Emergency vehicles would be provided with access to Forrest Creste from Duvall Avenue SE and SE 140th Street extended. Police department vehicles traveling in the area on routine patrol would be easily directed to the site by radio contact during an emergency. The existing street grid would provide adequate access and circulation for emergency police and fire vehicles. Traffic generated by the site would not adversely affect response by emergency service providers. The issues of adequacy of service, response times, and number of field personnel are addressed in Section 3.13 Public Services. Hospital service is provided by Valley Medical Center, which is approximately five miles r . southwest of the site. The existing street network provides adequate circulation for ambulance service to the site. • 73 II G Alternative 1 - Site Plan B Alternative 1 is proposed with the same density as the Proposed Action. Therefore, the traffic generation and traffic impacts would be the same as that for the Proposed Action. In Alternative 1 the driveway on Duvall Avenue NE has been shifted to the north. This will provide a greater distance between the driveway and the intersection of Duvall Avenue NE/NE 4th Street. The added distance is perceived to benefit traffic circulation and increase the weaving distance between the intersection and the driveway. There are no other identified traffic issues that would be different from the Proposed Alternative. Alternative 2 - No Action The comparison of Proposed Action traffic to No Action traffic is illustrated in Table 2. No Action implies that the Orchards is not constructed. An alternative under the No Action would ,be the development of the subject property as 14 single family units. This would add about 140 'daily trips and would have negligible impact on the local transportation system. Negligible contributions would be made to the TBZ or other transportation improvements. The developers of Forrest Creste would not be required to complete mitigation improvements for 1993 conditions if there is no action, although other projects developed in the area would be required to contribute transportation improvement funds. Assuming that neither Forrest Creste nor any other developments are completed by 1993, the roadways would remain at an acceptable level of service (LOS D or above) for 1993 conditions. Mitigation Measures Mitigation measures are designed to improve the level of service to LOS D or better at the impacted intersections, improve circulation, and reduce accident potential. • The City of Renton has reviewed interim plans of the site and has proposed recommendations to mitigate traffic impacts. These recommendations are site related and are not a part of the TBZ; they are the responsibility of the developer. These recommendations included eliminating the northern most driveway to Duvall Avenue NE; providing additional right-of- way on 140th Avenue NE, providing a second access on NE 6th Street (SE 124th Street extended) and constructing the roadway to half-width from Duvall Avenue NE to the end; providing additional eight feet of right-of-way on Duvall Avenue NE and installing a left turn lane; and providing an additional emergency access in the northeast corner of the site. • The signal timing could be revised at NE 4th Street/Duvall Avenue NE, NE 4th Street/Union Avenue NE, NE 4th Street/Monroe Avenue NE, NE 3rd Street/Jefferson Avenue NE and NE Sunset Boulevard/Duvall Avenue NE. These intersections would also be monitored to provide improved traffic signal operations. • A proportional dollar contribution by Forrest Creste would help pay for projects identified in the East Renton TBZ. 74 • Adequate on-site circulation facilities for disabled users vehicles including parking spaces, ramps, and turn-outs could be provided at appropriate locations. • A school bus stop near the Orchards or Forrest Creste properties could be installed. • Traffic signal timing at signalized intersections could be an ongoing process. • On-site circulation amenities such as sidewalks or pathways could be provided to aid pedestrian circulation, especially for school children. I- • The proponent would notify Metro of their proposals so that bus service could accommodate the development and the potential for constructing a bus shelter near the site would be considered. • Carpools and/or vanpools could be coordinated on a complex-wide basis. Parking incentives could be considered. Unavoidable Adverse Impacts Forrest Creste and other proposed developments in the study area would add traffic to the existing street system. However, it is possible to mitigate some of the negative impacts that would result from the proposal and achieve adequate levels of service. 3.12 PUBLIC SERVICES 3.12.1 POLICE Affected Environment The Renton Police Department operates one station located at 200 Mill Avenue South which provides police protection for the entire city (see Figure 10). To function efficiently, the Department has developed patrol districts based on geography, travel times, population, calls for service and criminal activity. Response times vary depending upon the location within the city and the nature of the call. Priority one calls, those involving life-threatening emergencies or crimes in progress, have response times under three minutes. Response times for remaining calls (those not considered life-threatening emergencies requiring immediate assistance) range from 8 to 11 minutes. A Police Department mitigation fee is collected upon issuance of Certificate of Occupancy and held in a three-year bond (Penny Bryant, Renton Police Department, personal communication, July 1990). If the bond is not drawn against during the final twelve months of-the three-year period, it expires. If the bond is drawn against during the final twelve months, it is renewed for another twelve-month period. This continues until the bond is not drawn against during a consecutive twelve-month period, at the end of which the bond expires (Penny Bryant,.Renton Police Department, January 1992). 75 ,The City is further divided into grids which usually include six to eight blocks per grid. The proposed site is located within grid #2244. The boundaries of this grid are: NE 10th Street on 'the north, NE 4th Street on the South, Duvall Avenue NE on the west, and 142nd Street SE on ( , the east. This grid is somewhat larger than average due to its mostly undeveloped character. It is also unique in that only a small portion of the grid is located within the City of Renton. The Police Department received 41,230 calls_for service in 1991. This represents an increase Hof 22 percent over 1990 and 64 percent over 1985. Department statistics show that approximately one third of the calls for service are actually crimes. The majority of the calls j- regard animal complaints, thefts and suspicious people. The Police Department is now compiling statistics comparing the number of calls for service for iapartments and single-family homes. Preliminary findings indicate that the number of calls per unit for apartments (1.18 per unit) is higher than for single-family homes (.81 per unit). 'iApartmerit complexes in general have higher densities than single-family neighborhoods, ;therefore, a higher.total number of calls for service result from apartment complexes than from , single-family developments of equal size (Renton Police Department, phone conversation with 'Penny Bryant, July 24, 1990). 1 ; ;The Police Department is currently comprised of 78 commissioned officers and 30 full-time non- ;commissioned personnel for a total of about 108 full-time equivalent people., This represents an increase of ten percent over 1989 and 25 percent over 1985 and shows that police staffing has kept pace with the growth of the City. The City currently has 1.8 officers per 1,000 population due to new hiring in early 1990. Table 54 shows how Renton compares to other cities within the region. TABLE 5 - Officers Per 1,000 Population ::.:::.;::.::: Auburn 1.9 Bellevue 1.7 Kirkland 1.3 Kent . 2.3 Redmond 1.5 Renton 1.8 Tukwila 4.2 ; Environmental Impacts Proposed Action Development of the proposed Forrest Creste site would result in housing for approximately 354 new residents who would require police protection. Increased traffic as a result of the proposal 76 would require police responses for accidents and general traffic control. The anticipated 200 apartment units are expected to generate an additional 88 calls for service per year. The Renton Police Department has indicated that it does not anticipate that the Proposed Action would result in significant impacts to police service (Renton Police Department, memo from Penny Bryant, Crime Prevention Coordinator, October 13, 1989). rs- Alternative 1 - Site Plan B Alternative 1 would have impacts similar to the Proposed Action as the density remains the same. Alternative 2 - No Action The No Action Alternative would result in no additional requirements for police protection as long as the site remains undeveloped. Should single-family housing be developed at the site, there would be the potential for 14 new homes and approximately 37 residents who would require police services. Mitigation Measures • The Police Department uses a formula to calculate the amount of money necessary to mitigate impacts resulting from proposed apartment developments. The formula is based on the difference between the average number of calls which could be expected and the worst case number of calls which could be expected. The resulting number of calls is multiplied by $75.00 (the average cost for responding to a call) to determine the amount of the mitigation. In the case of the Forrest Creste proposal, the one-time fee would be $10,200. The mitigation is collected when the Certificate of Occupancy is issued (Renton Police Department, phone conversation with Penny Bryant, July 9, 1990). • The proposal could incorporate crime prevention measures into the design. For example, fences which can be seen through could be constructed so that people could not hide behind them. A low landscaping berm (not to exceed three feet) could be incorporated so people could not hide behind it. Locks for windows and lighting for pedestrian and tenant safety could also be included. Security systems and locking storage areas could be included by the property management. • Lighting of parking lots and buildings, deadbolt locks and steel doors and frames in all units should reduce possible burglaries, thefts and vandalism. • Organized neighborhood block-watch programs, or an on-site watch program, could partially mitigate impacts of the development. Unavoidable Adverse Impacts None are anticipated. 77 3.12.2 FIRE Affected Environment The City of Renton operates three fire stations and employs 80 commissioned fire fighting personnel and 11 non-commissioned fire personnel for a total staff of 91. First response service for the Forrest Creste site would be provided by Fire Station #12 (Renton Highlands) located at NE 9th Street and Harrington Avenue NE (see Figure 10). This station is staffed by five personnel and is equipped with one engine company and-one aid car. Response times from this station to the site would range from five and a half to six minutes. Any response time under ;eight minutes is considered acceptable (Jim Matthew, Renton Fire Department, personal `communication). Second and third response service would be provided to the site by Station #11 (the main fire station) and Station#13 (located in the southern portion of the City) respectively. The main fire station (Station #11) is located at 111 Mill Avenue South. It is staffed by nine personnel and yis equipped with one engine company, one ladder company, one,aid car and one command car. -. Station #13 is located on SE 170th Street and Benson Road South. It is staffed by three 'personnel daily and is equipped with one engine company. Additional support would come from 'fKing County which has a mutual aid agreement with the City of Renton. t i Forrest Creste's location is on the eastern edge of Renton Fire Department's first response area. The Renton Master Plan includes recommendations for the relocation of Station #12 closer to the outlying area and the construction of a new fire station to service the growing community. The timing for these recommendations is based upon the ability of the City to fund the improvements. In 1988 the City's voters turned down a request for a bond to fund a new station. As a result, scheduling for the improvements is unknown at this time. The Renton fire district is classified as a Class 4 Fire Protection Area as determined by the Washington Survey and Rating Bureau. This rating measures general protection capability. The ratings range from a low value of Class 10 to a high value of Class 1. In addition the Renton Fire Department established as part of its 1987 Master Plan a series of standards and guidelines to measure its performance. Those standards include: • Acceptable fire flow is defined as having water available to all parts of the city in sufficient quantity and pressure to extinguish the worst case fire in an existing or projected land use. • Acceptable response time is defined as having five firefighters on the fire scene in five minutes or less. • ' Acceptable response time is defined as having ten firefighters on the fire scene in ten minutes or less. • Acceptable manpower is defined as having five firefighters on site in first response and ten firefighters on site in second response. 78 • For the largest single-family residential calls, and multiple family, institutional, commercial and industrial service calls, the Department will depend on mutual aid agreements, off-duty personnel, and other management and administrative measures to provide necessary second alarm power. Environmental Impacts Proposed Action In 1989, the fire department responded to 5,033 calls. Of those approximately seven percent were fire related, 65 percent were medical problems and 28 percent were for other responses (i.e.,false alarms, service responses, hazardous conditions). Fire department personnel estimate that construction of 200 units on the proposed Forrest Creste site would average approximately 20 additional calls per year. This is based on the average calls for 50 complexes similar to the Forrest Creste proposal. In general, the construction characteristics of the proposed development would tend to reduce the occurrences of fire on the site as compared with developments built in the past when construction codes were less sensitive to the safety. In cases of cumulative emergencies where the City's firefighting resources were exceeded, a mutual aid system would be implemented. This system would involve all King County Fire Departments (Fire Districts #20, #25, #40 and #43 are automatic response), Tukwila and Kent. Existence of mutual aid systems provide additional personnel and equipment to any location within the City of Renton with varying response times. Since mutual aid agreements normally include reciprocal agreements, the City's fire department would also be available to respond to emergencies in any of the other mentioned areas in cases where their resources were overextended. Alternative 1 - Site Plan B Impacts from this alternative would be similar to those from the Proposed Action. Alternative 2 - No Action The No Action Alternative would require no additional services as long as the site were to remain undeveloped. Should the site be developed as single-family housing, the 14 residences allowed under existing zoning would require the services of the fire department. Services would be available as for the Proposed Action and Alternative 1. Mitigation Measures • All apartment units would be equipped with smoke detectors. • The water systems for Forrest Creste would include fire hydrants and would be designed to provide adequate fire flows for the development. More detailed discussion of water for fire flows is included in Section 3.14.2 of this document. 79 ' I • • Access to Forrest Creste would be via paved, public streets constructed to City standards. • Access for emergency vehicles only would be provided at 140th Avenue SE. Unavoidable Adverse Impacts .None are anticipated. '13.12.3 SCHOOLS Affected Environment •District Growth !The proposed site is within the boundaries of Renton School District #403. School children in ,;the area currently attend,Maplewood Heights Elementary School, McKnight Middle School and ,tHazen High School. The location of the schools which would provide service for the proposed li:site are shown on Figure 10. 'Many school districts around Lake Washington have been in long-term decline, although several have now begun growth patterns. The Renton School District has had a fluctuating pattern with some upturns and some down. Enrollment has ranged from a high of approximately 16,000 students in the late 1960's to early 1970's to approximately 11,700 students in the 1991-92 school year. Table 6 shows the historic growth patterns for the District. It is important to note that while total student population has decreased slightly, the number of elementary students (grades K-6) has increased significantly from 6,243 to 6,735. (Dan Godfrey, Renton School District, 'personal communication.) TABLE 6 - Student Population 1987-88 to 1991-92 TAt NTAR� �> IDDIJE >>'<HIGH`< > <�>>> II�< <.TG. :::::::::::. ET�ENIE.:.::.:.:....:Y:. ;:.:,...M... :.:>:.:..:.:.::....:.::: .�: SPEC. ::.::.:::::...... :::....:::.: OO :i!: SCHOO::. > PROG ; ;:.::.> «oomm 00 ::>:: »>:�»»»:<:»:«:»>>�>:«:»»»>::»»>::»::»>::><»:::<::<::<;:>::<:::>::> >::::SClt00 .... ..SCE L. ...PROGRAMS.... ........................ 1987-88 6,243 1,669 4,001 31 11950> 1988-89 6,513 1,560 3,735 47 1989-90 6,680 1,647 3,549 26 =1"155 .....:.... ............. 1990-91 6,732 1,698 3,371 22 1991-92 6,735 1,641 3,280 23 * Source: Renton School District 80 ti Facilities The School District operates 13 elementary schools, two middle schools, three high schools, and one alternative high school. The majority of the school buildings in the district are less than r thirty. years old and are in good condition. The Renton School District has one of the highest assessed taxable property valuations and one of the lowest property tax rates in King County. This is primarily due to the large industrial complexes and local headquarters for national companies located in the City. The assessed property value per student is approximately $309,000.00. Environmental Impacts Proposed Action •The number of additional school children for multi-family homes is calculated using a multiplier of 0.33 children per unit (Renton School District). Upon completion and full occupancy, the Forrest Creste proposal would generate an additional 66 students. The distribution of the students is shown in Table 7. This table shows that the most significant impacts resulting from the proposal would occur at the elementary school level. TABLE 7 - Distribution of Students ........................................... ..............: .......:................:.....::.:........ aER:OF. PERCENT<>OF><> '< NU• O ..... Y'UAB . . ....... K-6 68 percent 45 r- 7-8 17 percent 11 9-12 15 percent 10 r ; The Forrest Creste proposal would only moderately impact school capacity. School District personnel have stated that by using current expansion measures (i.e., use of portable classrooms, opening closed schools, use of school library and cafeteria space) the children generated by the L Forrest Creste proposal could be accommodated. However, other proposed residential developments (single-family and multi-family) would also impact schools in the area. If all of the proposed developments were constructed, they could potentially generate over 1,200 students. The cumulative impacts from all proposed developments in the area may pose significant impacts for the District particularly at the elementary school level (grades K-6). Alternative 1 - Site Plan B Alternative 1 would have the same impacts as the Proposed Action. 81 ,- Alternative 2 - No Action If the site were to remain undeveloped, it would require no additional school capacity. If the site was developed in single-family residences, it would generate approximately seven additional school children. { Mitigation Measures • The District could purchase, lease and/or construct portable classrooms, to accommodate enrollment increases. This option provides the district with the maximum flexibility to respond to shifts in the number of students at different grade levels. • Schools which are currently closed could be reopened. Unavoidable Adverse Impacts The most significant impacts resulting from the development of Forrest Creste would be at the elementary school level. The School District does not currently have a strategy to fully mitigate these impacts. 3.13 UTILITIES 3.13.1 SANITARY SEWER 1 � Affected Environment The proposed Forrest Creste site is located in the Maplewood drainage basin. Currently, there are no sewer lines connected to the site. In response to rapid growth and concern for sanitary sewer capacity in the South Highlands,Maplewood and Heather Downs drainage basins, the City of Renton declared a moratorium on connection of new construction to any existing sewer systems in July 1989. The first declaration was in effect until January 31, 1992. The City then extended this period in late January 1992. This extended moratorium will be in effect until August 31, 1993. The City will then either have improvements in place to increase capacity or the moratorium will be extended. The City is in the process of determining the permanent solution for the management of wastewater. A study of potential design plans and locations for a new interceptor to relieve the capacity problems is being conducted at this time. These issues are addressed in the East Renton Interceptor EIS which should be published in April. While the proposed Forrest Creste site is within the area covered by the moratorium, the applicant for this project and applicants for eight other developments are eligible to apply for a limited exemption. These developments were granted potential exemptions from the moratorium since they had approached the City with development proposals prior to adoption of the resolution which establishes the moratorium (City of Renton Resolution No. 2764). Two options were open to the identified developments. They could hook-up to the existing sewers 82 until the existing capacity was reached or they could construct interim improvements to increase the available capacity of the sewer system. In either case, City Council approval must be obtained in order to be granted the limited exemption. The remaining existing sewer capacity has been reached or allocated to projects. Therefore, the only options open to Forrest Creste are to construct interim sewer improvements or wait to develop until the City has a permanent solution in place. In late May of 1990, a plan to construct interim sewer improvements (Preliminary Design Report for A Sanitary Sewer Interbasin Transfer from the Upper Heather Downs Basin to the Lower Maplewood Basin) was submitted for City Council approval. The plan details interim sewer improvements for three of the nine potentially exempted developments (The Orchards, Bakke, Inc., and Forrest Creste). Figure 13 shows the location of the improvements. According to the plan, costs to construct the interim improvements would be shared by the three developments that would benefit from them. The Council approved the Preliminary Design Report for A Sanitary Sewer Interbasin Transfer from the Upper Heather Downs Basin to the Lower Maplewood Basin plan and its improvements in July 1990. Environmental Impacts Proposed Action The current sewer capacity is less than that which would be necessary to serve the Forrest Creste proposal. The report on interim sewer improvements discussed previously includes an analysis of the flows generated by the Forrest Creste proposal. From that analysis preliminary cost estimates were calculated for each of the three proposed developments which would use the improvements. These estimates are based on the percentage of wastewater contributed by each development to the various segments of the total improvement. The improvements outlined in the interim improvements report are intended to be a temporary solution until the City has a permanent solution in place. At that time the proposed developments would be required to connect to the new interceptor. A new interceptor would have adequate capacity to service the proposal. Alternative 1 - Site Plan B This alternative would have the same impact on sewer capacity as the Proposed Action as the same number of units would be built. L_; Alternative 1 - No Action If the site were to remain undeveloped, no sanitary sewer facilities would be necessary and therefore no impacts would result. If the site were developed as single-family housing, they r_. would be required to attach to Renton's new interceptor once it was in place. 83 ti � • • I /, l r---- - , ,"• I i�� I � loth 51 L oil -- - h I —— I - _•`;1 11 i' 4 i I!NE 9th ST— . c > J 9th ST t �� � ��`4vij r !iø I ` II II'I • li �I II . I`'i 1 —=' �i, gl( NE7thST _�� I' ��l— f ' . . • r r - ) 1, siiiimai 1 . � Mi r� 1 >o e01 , � � < _ 7 a — J A fi' a= NE 4th ST O N LAN ., __. zci;c7r..-- . - . - 7- -L...n-cw„ i 5t .��- CRffNWO0O .NE 3rd Pt. , lOHLAND I te e.. kit BASIN ! CEYEiARY •. CEYETARY LOWER ^ o � ra ' PLEYYOOD S o o �� •II � BASIN , ti„,—__.."' 1:11001. \- 1A,,,v,)_ ile ?c"ii \�� ,• • �� HEATHER ,��. ; • 8 DOWNS , SE 5th ST BASIN i 61*--'.PC;-;-- Po44 �/ _ {tAP�E1H�0 j'. g K •i .SZt COIF COURSE 1 e _ 1 \`� rs�/r� ! / <1 i • Legend _._._._.�� _._._._._._. _._ 1. Forrest Creste i — i ` �� --•��' 2. Renton East i CEDAR 3. Bakke, Inc. NE Moratorium Boundary - ■■Approved Interim Improvements Gravity Sewer to be built - by Developer f - - Forrest Creste Renton, Washington Sanitary Sewer System I PACIFICn Not to Scale N 84 Figure 13 Mitigation Measures • The developer would be required to obtain from the City Council a limited exemption from the existing sanitary sewer service moratorium. This would require participation in the approved interim improvements including payment of a proportionate share of the costs of constructing the improvements. • To tie into the interim improvements, the proposed Forrest Creste development would construct a gravity flow sewer to connect to the existing manhole at the intersection of NE 4th.Street and Anacortes Avenue. r • The developer would agree to pay a proportionate share of construction costs and connect to the new interceptor. This would include a gravity sewer being constructed from the site to the interceptor. Figure 13 illustrates existing sewer lines, the approved interim improvements and the additional gravity sewers necessary to connect to the improvements and the new interceptor. Unavoidable Adverse Impacts No significant adverse impacts would be expected provided that interim sewer improvements were constructed in the short term and that any development would connect to Renton's new interceptor in the long term. 3.13.2 PUBLIC WATER SUPPLY Affected Environment The water supply for Renton lies in an aquifer within the city boundaries. The aquifer is a reliable source which consistently produces high quality water. Figure 14 illustrates Renton's existing water system. In order to protect this valuable resource, Renton has an active aquifer protection program in place. This program includes development of ordinances, protection and monitoring of well fields, and application to the U.S. Environmental Protection Agency for Sole Source Aquifer protection for its Cedar River Aquifer. Renton's Aquifer Protection Ordinance is discussed in detail in Section 3.3 of this document. The closest water main to the site is an eight-inch line which runs along NE 4th Street and ends at the intersection of NE 4th Street and Duvall Avenue. A 12-inch main extends south from NE 4th. Renton is in the process of updating its Comprehensive Master Plan for Water Utility. This document is under SEPA review at the time of this writing. Environmental Impacts Proposed Action • Water Department personnel have indicated that the impacts from Forrest Creste would be relatively minor(Renton Public Works,phone conversation, Abdoul Gafour,July 11,1990). The 85 i0 9 C T '^ 4 3 ii 17 K 1s '� n is 3�z� � , l"► 1 1 1>l l i i l l l l l lu l I II —_� ,, ---- N.E.I 10TH ST., ____r. ,.—=to 1. ' !-- Li W 1 %.c. uTy aT. in --- 1 "may _ �+� I S.E. 11STA ST. - W • r > HONEY DEW q ELEMENTARY SCHOOL • B. 1 I, u, I ui __ Z S.E., 'y!r.' —di . _ w Jee" t *M sT. D ..=- - S.E. 121 ST. Z W K. a_ I i o AMPAIl - ' 1 L� 1ZL A 1T. 1 Proposed ___. „ n 1 Site _i= i kg" - 2.1 ry I - jfriu I A TT 30 • 1 o- 4 w 1 L_ z w 1 1 a Z . a . , _ • 1 L- _ • _ N.E. 4TH ST. _AO 5 — ----• �— S.E. 128TH ST.— I 1r— I ui LI,LI Legend • a Cn _ mommom Existing Water Mains co . liwads Proposed Water Mains r Forrest Creste Renton, Washington A — 500 101 Existing and Proposed I PACIFIC n Scale in Feet Public Water System N 86 Figure 14 area of greatest concern is that adequate fire flows be supplied to the proposed development. This could be accomplished by extending (at the applicant's expense) a 12-inch main north along Duvall Avenue to the northern property boundary and a 12-inch main from Duvall Avenue NE at the southern property line west approximately 600 feet to connect with the exiting main within the Windsor Place Apartment Complex. In addition, the developer would be required to provide a looped water system within the interior of the proposed development. This main would consist of either 8-or 12-inch main depending upon which was necessary to provide adequate fire flows. All of these improvements are shown in Figure 14. Alternative 1 - Site Plan B Impacts which would result from this alternative would be similar to the Proposed Action. Alternative 2 - No Action In its undeveloped state, the site would not.require public water and would therefore generate no impacts to the public water supply. With single-family housing, water service to 14 residences would be needed. As the residences were constructed, water lines would have to be extended to provide service. Mitigation Measures • The proposed development should receive adequate fire flows necessary for apartment units. These flows would be provided by water mains constructed at the developers expense to City of Renton standards. • The proposed development would receive an adequate supply of domestic water. Unavoidable Adverse Impacts None are anticipated. 3.13.3 OTHER UTILITIES Affected Environment Electrical service in the area is supplied by Puget Sound Power and Light Company. A 115 kV transmission line and distribution lines are currently in place along NE 4th Street south of the proposed site. Distribution lines extend up Duvall Avenue but end before they reach the site (Puget Sound Power and Light Company, phone conversation with Don Reynolds, July 25, 1990). Washington Natural Gas Company provides natural gas services to the area. Existing gas mains in the immediate area include: six-inch mains in NE 4th Street and a two-inch main which extends from NE 4th Street approximately 600 feet north along Duvall Avenue. (Washington Natural Gas Company, personal communication with Tam King, July 30, 1990). 87 • The proposed Forrest Creste site would receive telephone service from U S West Communications. A "main" feeder cable is currently in place along NE 4th Street (U S West Communications, personal communication with Frank Forrest, July 25, 1990). Garbage collection for Renton residents is provided by Rainier Disposal. The City of Renton contracts with the disposal company and residents receive their bills from the City. Refuse is disposed of at the Renton transfer station. From there it is transported 'to the Cedar Hills Landfill. • The Cedar Hills Landfill serves the suburban King County cities and is reaching capacity. The cities which use the landfill entered into an 'agreement 'in 1989 to develop a Solid Waste `Management Plan. To extend the life of the Cedar Hills Landfill, one of the elements of the plan is for the municipalities to provide for single-family and multi-family recycling. To implement this element of the plan, apartment complexes would have to provide space in their •parking lots for recycling dumpsters. At this time no criteria has been established for how much space would need to be set aside, but it would need to be approximately one parking space (to accommodate a recycling dumpster) for every garbage dumpster provided (City of Renton Solid Waste Division, telephone conversation with Joan Griffes, July 26, 1990). The recycling element of the Solid Waste Management Plan is consistent with legislation passed in 1989 which states that cities in urban areas must provide recycling opportunities for multi-family complexes (House Bill 1671). Environmental Impacts Proposed Action According to Puget Power personnel, adequate capacity exists to serve the proposed development and other developments likely to occur in the area. In accordance with Puget Power policies, ' the developer would be required to provide trenching within the boundaries of the site where electrical cable would be placed. Design and hook-up to existing transmission and/or distribution lines are routinely carried out by Puget Power at no cost to the developer. U.S. West Communications would be able to adequately service the proposed site. They would require the developer to place conduit within the boundaries of the site and to any proposed structure. U.S. West would provide routine connection between its feeder cable in NE 4th Street and the site along Duvall Avenue NE at no cost to the developer. Washington Natural Gas would be able to supplyservice to the proposed site. The existing g mains would have to be extended to provide service to the site. Washington Natural Gas has a formula for calculating the "allowable expenditure" for extending gas mains. This formula is based on the costs of extending the main and the anticipated revenues from providing service. If the costs are greater than the anticipated revenues, the developer and Washington Natural Gas split the costs of extending the mains. The proposed Forrest Creste development would house approximately 354 additional residents. Based on the most recent numbers available (1987), these residents would be expected to generate approximately 257.7 tons of garbage annually(this assumes four pounds of garbage per 88 person per day). The King County Solid Waste Management Plan proposes to reduce the solid waste stream by 65 percent by the Year 2000 by making recycling strategies a top priority. It includes interim goals of reductions of 35 percent by 1992 and 50 percent by 1995. By using the recycling strategies outlined in the Plan, the solid waste generated by the proposed development could be reduced to as little as 167.5 tons by 1992, thus prolonging the life of the Cedar Hills landfill. Alternative 1 - Site Plan B Impacts resulting from Alternative 1 would be similar to those associated with the Proposed Action. Alternative 2 - No Action The No Action Alternative would require no additional services as long as the site was to remain undeveloped. Should the 14 residential units allowed under existing zoning be built, the occupants (approximately 37) would potentially generate four pounds of solid waste per person per day for a total of approximately 30 tons per year. Mitigation Measures • Homes would be constructed to meet current energy code standards to minimize energy demands. • All utility lines would be placed underground to meet City of Renton requirements. • Purveyors of utilities have indicated that sufficient capacity is available or has been planned to service the needs of the proposed Forrest Creste development. • Utility lines would be installed according to standards established by the purveyors. • Space would be allocated in the service dumpster areas of the proposed development to provide for recycling opportunities. Unavoidable Adverse Impacts None are anticipated. 89 References REFERENCES City of Renton, 1990 Municipal Budget. City of Renton, April 1984. Comprehensive Park and Recreation Plan. City of Renton, July 19, 1989. Resolution No. 2764. City of Renton, October 1989. Community Profile, City of Renton. City of Renton Fire Department, Jim Matthew. Personal communication. City of Renton Parks and Recreation Department, Randy Berg. Personal communication. City of Renton Parks and Recreation Department, Sam Chastian. Personal communication. City of Renton Public Works, July 11, 1990, Abdoul Gafour. Phone conversation. City of Renton Police Department, Penny Bryant, Crime Prevention Coordinator, October 13, 1989. Memorandum. City of Renton School District, Dan Godfrey. Personal communication. City of Renton Solid Waste Division, July 26, 1990, Joan Griffes. Phone conversation. City of Renton Water Works Craig A. Peck & Associates, October 18, 1982. Draft Environmental Impact Statement, Northward Rezone and Development. Dodds Engineers, Inc., May 23, 1990, Preliminary Design Report for A Sanitary Sewer Interbasin Transfer from the Upper Heather Downs Basin to The Lower Maplewood Basin. Furstenburg, Bob. King County Surface Water Management Division. Personal communication. Horner, Richard R., 1988. Biofiltration Systems for Storm Runoff Water Quality Control. Prepared for Washington State Department of Ecology and others. King County, 1990. Surface Water Design Manual. King County, Public Works Solid Waste Division, July 1989. Proposed Comprehensive Solid Waste Management Plan. Kreitman, Gayle. Regional Habitat Manager, Department of Fisheries. Personal communication. 90 Pfeiffer, Department of Wildlife. Personal communication. Puget Sound Air Pollution Control Agency, December 1989. 1988 Air Quality Data Summary. Puget Sound Power & Light, July 25, 1990, Don Reynolds. Phone conversation. State of Washington Department of Fisheries, March 5, 1990. Scoping comments for Forrest Creste Apartments Environmental Impact Statement. Terra Associates Inc, July 12, 1990. Geotechnical Engineering Study, Forrest Creste Apartments. Transpo Group Traffic Study U S West Communications, July 25, 1990. Frank Forrest. Phone conversation. Washington Natural Gas, July 30, 1990. Tam King. Phone conversation. I J 91 APPENDIX A LEGAL DESCRIPTION LEGAL DESCRIPTION - FORREST CRFSTE The land referred to in this commitment (A.L.T.A. Commitment Order No. 77160) is situated in the County of King, State of Washington, and described: The east half of the northeast quarter of the southwest quarter of Section 10, Township 23 North, Range 5 East, W.M., in King County, Washington; EXCEPT that portion thereof platted as Park Terrace No. 1, according to the plat thereof recorded in Volume 65 of Plats, pages 18 and 19, in King County, Washington; AND EXCEPT that portion thereof conveyed to King County for road by deeds recorded under Recording Number 6407767 and 6407768. r`- 1 A4 Il it A-1 APPENDIX B GEOTECHNICAL STUDY TERRA ASSOCIATES, Inc. Consultants in Geotechnical Engineering, Geology • and Environmental Earth Sciences July 12, 1990 Project No. T-1416 Mr.Ron Deverman Wilsey and Ham Pacific 1980- 112th Avenue NE P.O.Box C-97304 Bellevue, Washington 98009-7730 Subject: Geotechnical Engineering Study Forrest Creste Apartments 12200- 12400 Block 138th Avenue SE Renton, Washington Dear Mr. Deverman: C- As requested, we have conducted a geotechnical engineering study for the proposed Forrest Creste Apartments in Renton. The location of the project is shown on Figure 1. The purpose of our study was to explore subsurface and groundwater conditions at the site in order to provide geotechnical information on the feasibility of developing this site, recommendations for site preparation, foundations for the proposed structures and site drainage. We also prepared information to be incorporated in an,Environmental Impact Statement (EIS). The scope of our study included site reconnaissance, excavation of several test pits and probes across the site, laboratory testing of representative soil samples, engineering analyses and the preparation of this report. This report presents the results of our observations and studies along with supporting field and laboratory test data. SUMMARY Our study indicates that the site is underlain at a shallow depth by loose to medium dense j'- silty sand overlying dense, gravelly, silty sand till soils. Conventional spread footings may be used as foundation support for the proposed apartments. These footings may bear on the undisturbed, competent, native soils existing at the site or on compacted fills placed above the competent, native soils. Old fill soils up to eight feet thick are present in the northwestern corner of the site. These fills should be removed from building and parking areas. 12525 Willows Road, Suite 101, Kirkland, Washington 98034 • Phone (206) 821-7777 • FAX 821-4334 Mr.Ron Deverman July 12, 1990 Moderate groundwater seepage was noted in several of the test pits in the western portion of the site. The groundwater appears to be perched on top of the till and will produce seepage in two to three foot cuts. To minimize difficulties in working with the moisture sensitive native soils, we suggest that grading be performed during the dry season and when soil moistures are reduced. This will improve the chances for using the native materials as fill material. If grading is to be performed in wet weather, you should plan on importing significant quantities of clean granular soils for use as structural fill. PROJECT DESCRIPTION We understand that the 11.73 acre site is planned to be developed as a 200 unit, multi- t ` I; family apartment complex. Twenty-one residential buildings with separate carports and one recreation building are planned for the project. The structures will probably be two and three story, wood-frame buildings with slab-on-grade floors. Some daylight basements may be constructed. At the time of our study, a site plan showing building and roadway layout superimposed L on topography was provided to us. No grading plans or building details were provided to us. However, we expect minor cuts and fills will be required to provide building pads, basement excavations and pavement areas on the gently sloping site. Considering the existing topography on the site, the cuts and fills may have magnitudes on the order of five to ten feet or so. Basement walls are likely for the buildings in the deeper cuts. Access to the site will be from 138th Avenue SE and also from the property to the south. When project plans are finalized, Terra Associates should be notified so that we can review the building and grading plans and prepare final recommendations. FIELD EXPLORATION AND LABORATORY TESTING The subsurface exploration for this study was conducted on June 13 and 18, 1990. Subsurface conditions on the site were explored by excavating 10 test pits using a backhoe provided by All Seasons Construction of Duvall, Washington. In addition, five probes were performed using hand auger. The test pits were excavated at the approximate locations shown on the Test Pit Location Map, Figure 2. The locations of these test pits and probes were approximately determined by pacing from assumed property corners. Elevations at test pit and probe locations were determined by interpolating between contours shown on the topographic survey provided to us. The field exploration was monitored continuously by our geologist who classified the soils encountered, maintained a log of each test pit and probe, obtained representative soil samples and observed pertinent site features. All samples were visually classified in ,+ I, accordance with the Unified Soil Classification System described on Figure 3. The logs of the test pits are attached to this report as Figures 4 through 11. The probe logs are presented in Table A. it 1 ', Project No. T-1416 >> Page No. 2 Mr. Ron Deverman July 12, 1990 The soil classifications shown on these logs represent our interpretation of the field logs and reflect the results of visual examinations as well as laboratory tests performed on samples obtained from the test pits. Representative soil samples collected from the test pits were returned to our laboratory for further examination and testing. Moisture contents were determined for all samples. Sieve analyses were performed on selected samples. The results of our laboratory testing { are shown on the test pit logs and on the grain size analysis plots, Figure 9. SITE CONDITIONS Surface The project area occupies 11.73 acres of gently sloping terrain east of 138th Avenue SE and south of SE 122nd Street in Renton, Washington. The topographic relief across the site is approximately 60 feet, rising from Elev. 395 feet in the southwest corner to Elev. 455 feet in the northeast portion of the site. In general, the site slopes toward the southwest at inclinations of 10 to 20 percent. Some old fill piles are present in the extreme northwestern portion of the site. The site is .vegetated with dense, middle-aged fir, cedar, maple and alder. The - underbrush in the southwestern portion of the site becomes very thick. The extreme northwestern portion of the site has been utilized as horse pasture and is mostly barren of vegetation. A horse stable is present in this area. A small stream crosses the northern portion of the site. The origin of this flow appears to be, in part, from drainage off the development to the northeast of the site. This drainage has been routed onto the site from near the projected intersection of 140th Avenue SE and SE 122nd Street. Some erosion has occurred a fair distance downslope from the outfall. The site is bounded on the west by 138th Avenue SE, across which is an undeveloped site. The southern property boundary adjoins an undeveloped, forested land. The eastern margin of the site lies adjacent to forested property and sparse single family lots. Across the northern boundary of the site is a single family residential area. ' Subsurface yG ! The U.S. Geological Survey has mapped the geology of the study site as Vashon till. The till was deposited about 15,000 years ago along the base of the Puget Lobe during the Fraser Glaciation. - In general, our findings support the USGS determination. In each test pit, an average of about 6 inches of duff and topsoil were found to overlie reddish brown, silty sand with gravel. This deposit is underlain at depths of two to four feet by olive to gray, medium dense to dense, gravelly, silty sand till. This till material extends to depths exceeding 10 feet, the maximum depth explored. Project No.T-1416 Page No. 3 Mr. Ron Deverman !' July 12, 1990 1' Groundwater { Groundwater was encountered in many of the test pits and probes excavated on the site. Light to heavy seepage was noted from the top of the till unit at depths of two to four feet throughout the entire western and northwestern portions of the site. The perched groundwater may be more prominent in the winter months when precipitation is greater. Groundwater conditions in the area surrounding the site were evaluated using well logs on file at the Department of Ecology. From these logs, there is evidence of a regional groundwater table at approximate Elevation 350 having a gradient to the west. Slope Stability The slopes on the site are gentle to moderate. The steepest slopes on the site were approximated at 15 to 20 percent. Given that the entire site is underlain by dense glacial till, the slopes should remain in their presently stable condition, provided erosion prevention measures are taken. The seismic hazard associated with glacial till soils on gentle to moderate slopes is low. The area lies outside Class III Seismic Hazard zones as delineated in the King County Sensitive Area Map Folio. DISCUSSION AND RECOMMENDATIONS Based on our subsurface exploration and field observations, it is our opinion that the site is suitable for the proposed apartment complex. Buildings may be founded on conventional spread footings bearing on firm native soils or on compacted structural fill. If native soils become disturbed or wet, they should be removed and replaced with clean crushed gravel or structural fill. Roadways may be built on recompacted native soils after a, removal of fills and organic rich soils or on structural fill. Due to the moisture sensitivity and relatively low permeability of the site soils,we suggest you plan to conduct the earthwork during the dry season and when surficial soils are not excessively moist. In wet weather, it will be very difficult to compact the onsite soils. In dry weather, the likelihood of using the onsite soils for fill will improve substantially. If grading work must be performed in wet weather, you should allow for import of significant quantities of clean granular soil for use as fill. We anticipate that minor cuts and fills will be required for most roads and building pads. Permanent cut slopes should be graded to 2:1 (Horizontal:Vertical). Temporary cuts up to ten feet high may be made at 1:1. Fills should be constructed in accordance with recommendations in the Site Preparation and Grading section of this report and should be made at inclinations of 2:1. Project No.T-1416 Page No.4 Mr. Ron Deverman July 12, 1990 If cuts encounter seepage during the initiation of earthwork, interceptor drains should be constructed on the uphill side of roadways and building pads to prevent the working area from becoming wet. Proper drainage should be installed around the perimeter of all foundations. This report has been prepared in accordance with generally accepted geotechnical engineering practices. We do not guarantee project performance in any respect, only that _.� our work meets normal standards of professional care. No other warranty, expressed or implied, is made. This report is the property of Terra Associates and is intended for specific application to this project and for your exclusive use. � J The following sections of this report describe our recommendations in greater detail. Foundations Apartment buildings to be constructed on the project site may be supported on continuous and/or isolated spread footings bearing on the competent, native soils present 1_- below the topsoil and organic-rich layers or on compacted, structural fill placed above competent, native soils. The near surface soils below the topsoil are loose. Hence, depending on the depth of the excavation required to reach design footing grade, the native soils may need to be recompacted in place. If soils become disturbed and softened by excessive moisture due to seepage into excavations or rain, these materials should be removed and clean gravel should be placed in the footing excavations. The gravel mat should extend beyond the edge of the footing a distance equal to its depth. Continuous and individual spread footings for the proposed buildings may be designed for ` ( an allowable bearing pressure of 3,000 pounds per square foot. Footings should extend to a minimum depth of 18 inches below the lowest, adjacent, outside finish-grade. A minimum width of 12 inches should be used for continuous footings and individual spread footings should have a minimum size of 18 inches. A one-third increase in the above bearing pressures may be used when considering wind or seismic loads. All footings should be provided with steel reinforcement in accordance with structural requirements. Old fills are present in the northwestern corner of the site. For any structures to be constructed in this area, foundations and slabs should bear on native soils beneath the existing fills. Alternatively, the fills may be removed and replaced by structural fill. Settlements We anticipate that the total settlements for the apartment buildings supported on the competent, native soils,bedrock, or on compacted, structural fill will be less than one-half inch. Long-term differential settlement of buildings between the center and the edges should be less than one-quarter inch. The majority of the settlements should occur during construction. • Project No.T-1416 Page No. 5 � l Mr.Ron Deverman July 12, 1990 Slabs-On-Grade Concrete floor slabs, if used, may be constructed as slabs on grade supported either on the competent, native soils or on structural fill. We recommend that four inches of a free- draining gravel, such as 1/4 to 3/8 inch pea gravel, be placed below the slab to act as a capillary break. In addition, a plastic membrane with a thickness of ten to twelve mils should be placed above the gravel to act as a vapor barrier for additional moisture protection. Basement and Retaining Walls If lower level basements are planned, or if retaining walls are needed at grade changes on the site, the walls should be designed to resist the lateral pressure imposed by an equivalent fluid weighing 40 pounds per cubic foot(pcf). If walls are restrained from free movement at the top, they should be designed for an ' additional uniform lateral pressure of 100 pounds per square foot. These pressures assume a maximum height of ten feet and that no surcharge loads will occur. Please contact us for supplementary recommendations if conditions are expected to be different. The basement walls and retaining walls should be provided with a continuous blanket of free-draining material at least twelve inches wide. A perforated pipe should be placed at the footing level to collect water and discharge it to the storm drain system. Horizontal Loads Horizontal structural loads carried to the foundations may be resisted by both friction forces on the base of foundations and passive resistance on the sides of foundations. --` A coefficient of 0.35 may be used between concrete and soil. Resistance to lateral loads may also be computed as passive earth pressures exerted by the soils adjacent to the foundations. We recommend using an equivalent fluid weight of 300 pounds per cubic foot where the foundations are poured neat against undisturbed soil, or where the backfill is compacted in accordance with the requirements for structural fill. Site Drainage Surface gradients across the site should be created to direct runoff away from the apartment buildings and towards suitable discharge facilities. If cuts encounter seepage during the initiation of earthwork, provisions should be made to install interceptor drains 1 or ditches along the uphill side of road alignments and building cuts. These drains will prevent shallow subsurface drainage from reaching the work area and creating unfavorable soil conditions. Once detailed grading plans have been prepared, we would be pleased to review them and provide our input for additional drainage requirements, if needed. Project No.T 1416 Page No. 6 Mr.Ron Deverman July 12, 1990 r Perimeter foundation drains should be installed and tightlined away from the apartment buildings. Drains should be at the levels of footing bottoms or crawl space levels, whichever is lower. Roof gutter drains should be separately tightlined away from the buildings. All drains should be discharged into the storm drain system. The drainage entering the site from the northeast should be routed into the storm drain . system proposed for the site. Site Preparation and Grading The site soils are very moisture sensitive and for this reason, we recommend conducting earthwork only when soil moisture contents are low. The building and pavement areas should be stripped and cleared of vegetation and topsoil. The stripped topsoils may be 1 used as berms or in nonstructural areas. Old fill should also be removed from building and roadway areas. Following stripping, any loose areas noted should be over excavated and replaced with structural fill or crushed rock to a depth that will provide a stable base. If the over- excavated area remains soft and wet, a stable subgrade may be constructed by placing a geotextile in the bottom of the excavation and placing clean, crushed rock over it. Permanent cut slopes should be made at stable inclinations of 2:1 (Horizontal:Vertical). Fill slopes should also be made at inclinations of 2:1. Temporary cuts up to ten feet high may be made at inclinations of 1:1. Cuts in till soils may be made at a 1:1 inclination. Once planned cut locations are known, we suggest review by us so that we can provide you with supplementary information regarding appropriate cut slopes. All permanent exposed slopes should be vegetated to reduce the potential for erosion. Slope areas should be properly prepared prior to placing fills. A keyed toe and horizontal benches should be cut into native soils and the fill placed in horizontal lifts. Structural fill should be placed in thin layers and compacted to at least 95 percent of the maximum dry density in accordance with ASTM Test Designation D-1557 (Modified Proctor). All on-site soils are high in fines content making them difficult to compact in moist conditions, during rainy weather or when placed over existing wet conditions. Import fills, if needed for use in wet weather construction, should be predominantly granular with a maximum size of three inches and no more than five percent fines passing the No.200 sieve. 1 To avoid excessive earthwork costs, we recommend conducting grading operations after the site soils achieve workable moisture levels during the dry season. Project No.T-1416 - Page No. 7 Mr.Ron Deverman July 12, 1990 Pavement Areas Roadways may be constructed on the recompacted, native soils after stripping the surface of vegetation, topsoil, and old fill or on compacted structural fill depending on the depth of cuts or fills required to reach design grades. The upper twelve inches of the subgrade should be compacted to 95%of the maximum dry density(ASTM D-1557). If native soils cannot be compacted due to excessive moisture contents, they should be overexcavated and replaced with a thickness of clean, gravel pit run or crushed rock suitable to stabilize the subgrade. For fills more than .a foot thick, a compactive effort of 90% is adequate below the top foot. All subgrade areas should be in a stable, non-yielding condition prior to paving. For the anticipated use, a pavement section consisting of two inches of Class B asphalt over four inches of gravel base should be sufficient for parking areas. Heavy traffic lanes should be constructed with two inches of Class B asphalt over six inches of gravel base. Utilities -Where utility lines are to be excavated and installed in paved areas,we recommend that all bedding and backfill be placed in accordance with APWA specifications. Backfill placement and compaction should be in accordance with the recommendations given earlier in this report under Site Preparation and Grading. Significant seepage may be encountered in any of the excavations. The onsite silty soils will be difficult to adequately compact if they become very moist. In addition, deep utility trenches will be difficult to excavate once till is encountered. The contractor should be prepared to deal with this likelihood. Additional Services � If_ It is recommended that we be provided the opportunity for a review of the site layout, final design and specifications in order that earthwork and foundation recommendations may be properly interpreted and implemented in the design and construction. The analyses and recommendations submitted in this report are based upon the data obtained from the test pits and probes excavated on the site. The nature and extent of variations in the test pits may not become evident until construction. If variations then appear evident, we should be requested to reevaluate the recommendations presented in this report prior to proceeding with the construction. r-- It is also recommended that we be retained to provide geotechnical services during construction. This is to observe compliance with the design concepts, specifications and recommendations, and to allow design changes in the event subsurface conditions differ from those anticipated prior to the start of construction. I " Project No.T-1416 Page No.8 Mr. Ron Deverman July 12, 1990 We request that a minimum of two working days notice be given to schedule our services during construction. The following figures are included and complete this report: Figure 1 Vicinity Map Figure 2 Test Pit Location Map Figure 3 Soil Classification Chart Figure 4 through 8 Test Pit Logs Figure 9 Grain Size Analyses Table A Probe Hole Data Appendix A EIS Summary We trust the information presented herein is adequate for your requirements. If you need additional information or clarification,please call. Sincerely yours, TERRA ASSOCIATES,INC. rf • Anil Butail, P.E. President JJ/AB:tc `1 f , r Project No.T-1416 Page No. 9 I .. I =• I, 'KL is ' ��,•'.. "'A.'"C.."-_ 2 Z N-- •--- QUAH TN.ST'.. n 2 y q < - 44r ., • • :J:Tn Sr C] - 3_ . --- . I S.TN ,, IelE l'� , < = SE 10 N.VIM.I ,, .-■ .... . I I Fj . 1 -sj • t `yam ;._y; , R' '( i I . Y 4 • i;� i • � .'se�oFrx 'sT I -N;� X T • • �E-�, �I•`. 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I PARK . i 191BIN P, 1L\ • I¢, _! by OIS,,n' 11<, Sl 1'pTN J - I ! ..4 ...;: t -iz to T Sl+�. ` —•' Y` !!r :�.t'/•• .::P. :: I C T :1.0 N l.n #SF 1 \ j� ':.;.•i:::••..: •,I ktl T -f X 1 Y C T�T Y ���yy •.r{:•: y y� -_ IE I11N Pl lIz pq� SE 1� 1 • a 1 • 1"'� REF: Thomas Brothers Maps. 1989. L VICINITY MAP TERRA FORREST CRESTE APARTMENTS • • ��.AN ASSOCIATES RENTON, WASHINGTON 1a9r . Geotechnical Consultants Proj. No. 1416 Date 6/90 I Figure 1 I . • VENUE S.E. ^t -. , L NE, 138th A ° . n°c��p�oa,�` T i'-^ dLUM/NUM CAC" DUVAL AVENUE , 0' EXC /7 o7OA/-�y �, �1 1FOUNO /Tyo/c4 ) p0 1 ` ram— R Q✓EMe' 1 0 —-�. =—. ,�3 . _ tot - ° NOO'C}�77 E h 9 -. �- 6f 5G' �LaGGEo ° op ° , q• — =F - —0 �. — �►`-0✓843.� �14 J9'WET.dNO.a o ►� n' /e'0ONC CULVERT.) �'-- 095 9' '� -O]'00'00 JOO G1' / NO \ 410 h •' O m /NY. 990-LT /Zd66G0 WGT1sYJ0 d•O60 �..... .........9 f 1 t=• l 0 1 if ,,' 0, ; ; \ 0.6 t°\ AP:......______.------i p., 99.3sr• 9 5 09 .1•�1.-.ram../. ---C4 \ : �5 0 -�1 �jl g e9ti � \ \\\ ��.o h n o '1 0;- a ,�3 ' a,n Z /J c - .6 a ,cP ; o o a`:\\ 1.� n �� - `�o situ ,��n"` I .„.,__:::)/ o I. aoo i ); , P-13)\•, �t a —1711--n n, ,.. y9�° n°' �.e eo \1�1 \ ' 1 pe no ��G Q ��or► • a• a+�1.- ,2 T /381h PL S.E. G ••._........ 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TP-1 .�,1 , ► '� Qra:_"/' v... l 406 ►pa9 Oi•T �i \� ^ � 1l5 a�0 ` ` L10/e� 1P'.: \ . n�t /a,= ry 20 ' v TP 4 A • v 1 1 D - pt.o \�\ `3.e ae� r'( a 7.6 `�o +g4/_ Ree ,,.o�0bI�,,,tr /I _ .°N n \ 5•�' /1, '►�o \I `� IP .3 ►t n �1 vhee Fen/c�/ TP-7 GGQ4GE ^` ///� F.F IO 9] ,,, f �� 1� 1 1'� er 4I0 NOO GbS7'7 E % , FF• / 01 r �,•+ TP-2 • ` • p. ,��---s �� ►�' 1 • A/`"�` _►R6� /R� Legend f. 4 ,o° �03 �� ' aT _q s e It- RI��' ��G 5NC0 _ � 4' Approximate Location _ _ ; I TP-1'and Number of Test Pit • A. dy90 07 ° n3 1e1 x / <<0 !SO ,y' r^3 GoQa6E �= 010 `�' , a'° A�6 '� \ \, • A31.• TP-3 ,� ►u /- -� �`r z ID I ' I Approximate Location A ° 3 o R �� ,,_ �. a �e °/ , i �1$ul h:� /J'CONC CULYeQT I P-16 and Number of Probe 1 0 , A11 1�1 pt� 1 R3 A pR toe) \ P-11 pe V `� /NY I57OC 4)- ifr, tr) :' i R 4 p 1 e A a` ��.�� vr A A a9r1e�l— �`L."r �� / /0'CONC CU4YE.OT , NR�.S °a R 3 °3 1'� ►'' as° ���� e • Ino, ►A° 1 aao n� n5 c��n ` �p�'� a� ewM , I. /- NI o ►n e� ''� aR� p0 34' e° /.6 yy l —._fie / N.I 5/ ` S�\�—. . nn 0 ay e6 — —. -/40th=AIJ�S•t�— CA-- . �J--- W/?E ENC� 0 .. _ timanomm _ y R' 1 G-waTr� I'W/QEFENCE • / Ap Aar �m 0�/\/UIO'OBS7E ...p9' ,3�,+ _ 5---_1_— _1_� __i I Id 9 15 P I ` p10 , �A�` �.3 �// e `@2 it" .1,R 1� e 1 AsyS I — 0 40 80 "I 1 R, A0 7, ► ,p a Aa / ,� I. as °r ► It '1 $CB�e 111 Feet PACIFIC 2 FORREST CRESTS Renton, Washington • Source Terra Associates, dated June, ,ago. Site Plan ,' _ - Figure 2 1 ' • 1 SOIL CLASSIFICATION SYSTEM r i LETTER GRAPH I _ MAJOR DIVISIONS SYMBOL SYMBOL TYPICAL DESCRIPTION GRAVELS Clean GW :Q:o Well graded gravels, gravel-sand mixtures, u) Gravels' :.... little or no fines. _1 O e` More than 50% of (less than GP ::::::::•.•. Poorly-graded gravels, gravel-sand mixture , CO � coarse fraction 5% fines). I•:•:•:•:•:•:• little or no fines. ur °; .b • .''`J1 Silty gravels, gravel-'sand-silt mixtures, 0 N is larger than Gravels GM ':... .ct.�? non-plastic fines. j Z c No. 4 sieve. with fines. GC �� �� r �J Clayey gravels, gravel-sand-clay mixtures. < E plastic fines. C0 o o SANDS Clean SW Well-graded sands, giravelly sands, (5 c o Sands ::`::?:: i*:i: little or no fines. Z More than 50% of (less than SP ff Poorly-graded sands or gravelly sands, 5/o fines). r:::';:::}. little or no fines. Q o ,- coarse fraction 'Y' - :.: Silty sands, sand-silt mixtures, L 0 `— is smaller than Sands SM ,f':•:`. .-.: non-plastic fines. I U with fines No. 4 sieve. SC. Clayey sands, sand-Clay mixtures, e. plastic fines. U) SILTS AND CLAYS Inorganic silts and very fine sands, rock flour, --i ML silty rn clayey finesanos or clayey silts with �/ Inorganic clays of lo�v to,medium F _1 o Liquid limit is less than 50%. ,� g Y plasticity, 0 E o CLc\I > • • •t gri YSlly clays, sandy clays, silty clays, lean W o d GL iliIi"ilii Organic silts and organic clays of low _Z o z i:';':iiii11 plasticity. Q c c SILTS AND CLAYS MH EC (0 — N I Inorganic silts, micaceous or diatomaceous fine sandy or silty soils, elastic. ° � CH Inorganicy` W e, Liquid limit is greater than 50%. clays of high plasticity, fat clays. z ° E �{ N V) II 1 I' i 1 OH I 111I 1 ; ,I Organic clays of medium to high plasticr.y, I i'i' ' ' ' organic silts. HIGHLY ORGANIC SOILS PT • ; Peat and other highly organic soils. DEFINITION OF TERMS AND SYMBOLS 17, 2" OUTER DIAMETER I , I SPLIT SPOON SAMPLER C TORVANE READ ING,•tsf 2.4" INNER DIAMETER RING SAMPLER I I E OR SHELBY TUBE SAMPLER au PENETROMETER READING, isf . P SAMPLER PUSHED W MOISTURE, percentt of dry weight * SAMPLE NOT RECOVERED pcf DRY DENSITY, (pounds per cubic foot 4 2' WATER LEVEL (DATE) LL LIQUID LIMIT,percent L WATER OBSERVATION WELL EX PI PLASTIC INDEX N STANDARD PEN, ETRATION, blows per foot i 11—• T E R R,A ' ,,:.,y::,;: I FORREST CRESTE APARTMENTS _' ASSOCIATES RENTON, WASHINGTON I- i Pro Geotechnical Consultants I. No. 1416 Date I 6/90 IFigure I TEST PIT NO. TP-1 Logged By JJ Date 6-13-90 Elev. 412± 1 Depth W (ft.) USCS Soil Description (%) SM — .• Red-tan, silty SAND, trace gravel, rootlets, 17 very moist. loose to medium dense. • SM/ Olive, gravelly, silty SAND and SAND, moist SP to wet, medium dense. 5— i 11 — SM Gray, gravelly, silty SAND, moist to very moist, dense to very dense. (TILL) • 10— Test Pit completed at 9 feet. I`~1 — No groundwater seepage encountered. No caving. 15 TEST PIT NO. TP-2 Logged By JJ Date 6-13-90 Elev. 417± 0 9" DUFF and TOPSOIL Red-brown, silty SAND with some gravel 1.8 y:: SM and charcoal, very moist, loose. Grades to medium dense. 5 `'': SM Olive-gray, g y, gravelly, silty SAND, moist, dense to very dense. 11 y' (TILL) 10— Test Pit completed at, 9 feet. fl - No groundwater seepage encountered. — No caving. 15 TEST PIT LOGS TERRA IFCIRF1EST CRESTS ARMMIVIENTS ASSOCIATES Renton, Washington Geotechnical Consultants. Proj. No. 1416 Date 6/90 Figure 4 1__ : , ti ; r ; • TEST PIT NO. TP-3 Logged By JJ Date 6-13-90 Elev. 432± i Depth WI I (ft) USCS Soil Description (%) • 0 ' .+,,, 8" DUFF and TOPSOIL Reddish-tang silty SAND with some gravel and --- _, '*: ,, SM roots to 18 , moist, loose to medium dense. — STt Olive, gravelly, silty SAND, moist, medium _ i;;, dense to dense. (Weathered Till) r 5— SM Gray, gravelly, silty SAND, moist to very 12 --- moist, dense to very dense. (TILL) - ' Occasional cobbles. 10— 7 Test Pit completed at 92 feet. — No groundwater seepage encountered. : — No caving. 15 Logged By JJ TEST PIT NO. TP-4 Date 6-13-90 Elev. 420± 0 4" DUFF — k'*. SM i,Reddish-bran, silty SAND with gravel, trace charcoal, I __, — roots to 2f , very moist to wet, loose. - =: :. SM Olive, gravel, silty SAND, very moist to wet, 15 —` ;; medium dense. 5 ;'= Gray, gravelly, silty SAND, very moist, — �;:� SM dense. (TILL). I 1 . — ;;` -•1- 10 Test Pit completed at 9 feet. — Light groundwater seepage encountered at — 5 feet. — No caving. 15 _ I - 1� TEST PIT LOGS - TERRA • POST L STE -- �= ASSOCIATES II Li> Renton, Washington w Geotechnical Consultants Proj. No. 1416 Date 6/90 Figure 5 • ; TEST PIT NO. TP-5 Logged By JJ Date 6-13-90 Elevl 398± Depth W (ft.) USCS Soil Description0 (%) 8" DUFF and TOPSOIL SM Reddish-brown, silty SAND, abundant roots to 18 , very moist to wet, loose. • Olive to gray, gravelly, ;.,• g silty SAND, moist to SM very moist, dense to very dense. 10 (TILL) Test Pit completed at 81 feet. 10— Moderate to heavy groundwater seepage at 2 feet. No caving. 15 Logged By JJ TEST PIT NO. TP-6 Date 6-13-90 Elev. 436± 0 - . 3" TOPSOIL (?rg nir rich, ci Ity SAND — SM Reddish-brown, silty SAND with gravel, wet to very moist, loose to medium dense. L 141patherpd t rCl 5 SM Olive to gray, gravelly, silty SAND, very moist, dense to very dense. 16 t_ Test Pit compelted at 82 feet. 10 Moderate groundwater seepage encountered at3feet. No caving. r — 15 TEST PIT L dGS 77 TERRA c,TE ASSOCIATES Renton, Washington Geotechnical Consultants Proj. No. 1416 Date 6/90 Figure 6 TEST PIT NO. TP-7 Logged By JJ L Date 6-13-90 Elev. 444± Depth W (ft.) USCS Soil Description (%) 0 8" -DUFF and ITA I TT, Reddish-brown, silty SAND with gravel, roots SM to 2' , moist to wet, loose to medium dense. Olive to gray, gravelly, silty SAND, wet to moist, medium dense to very dense. ^:= SM (TILL) 10— Test Pit completed at 9 feet. Light groundwater seepage encountered at 3 feet. No caving. 15 Logged By JJ TEST PIT NO. TP-8 Date 6-13-90 Elev. 419± r-- 0 8" DUFF and TOPSOIL Reddish-brown, silty SAND with some gravel, ( roots to 3' , very moist to wet, loose to �` Medium dense. • l _ 5—.7/ - Olive to gray, gravelly, silty SAND, wet to SM very moist, medium dense to very dense. (TILL) • 10— Test Pit completed at 9 feet. Heavy groundwater seepage at 3 feet. No caving. 15 If TERRA TEST FIT LOGS - ASSOCIATES Renton, Washington Geotechnical Consultants ,Prof. No. 1416 Date 6/90 Figure 7 TEST PIT NO. TP-9 Logged By JJ Date 6-13-90 Elev. 422± Depth • (ft.) USCS Soil Description (o o) 0 ,.6" DUFF and TOPSOIL `" SM Reddish-brown, silty SAND, moist to wet, 21 • loose to medium dense. Roots to 2 feet. � ;`' Olive to gray, gravelly, silty SAND, very 13 ' SM moist, dense. (TILL) 10-' — Test Pit completed at 9; feet. — Light seepage at 4-5 feet. No caving. 15 Logged By JJ TEST PIT NO. TP-10 Date 6-13-90 391± Elev. 0 � �� r dish b SM rown, silty SAND, with same gravel, roots to 9'. very moist, medium dense. SM Tan, gravelly, silty SAND, wet, medium dense. 5 Gray, gravelly SAND, occasional cobble, very >::•; SM moist, very dense. 11 • Test Pit completed at 6 feet. Moderate seepage at 3 feet. No caving. 10- - 15 TEST PIT LOGS TERRA QR?S"TE AIRARTIVIENTS ASSOCIATES A.•: Renton, Washington Geotechnical Consultants Proj. No. 1416 Date 6/90 Figure 8 SIEVE ANALYSIS HYDROMETER ANALYSIS SIZE OF OPENING IN INCHES I NUMBER r:F MESH PER INCH. U.S. STANDARD GRAIN SIZE IN MM O m a v a N N .L. •t , cm .- .- Z.'. - V n O O O n O O CD O O O CDao p O _ I 1--- 0 - _ . 90• -_ 80 - _ C > —, — — 20 rI (!) rn -O — um — - - - - - = O .� 0 70 --.------ — ---------- --~— _- -------3 - ---- `---- - - 30 m == 3'' m == - -- —-- -- ' , t- Do �-, D -1 so - — -- S -- — —..-- 40 m --� M. -- — • ' I Z c rn Z -t if (� fT1 50 , t I n 50 a 3 — - _ •-_ O II` I - D al — 1-- _ — . ii 40 \ ' t t _ so m m � \ - t� 30 -- - �,! -+ 70 -< . • [7.13 20 -- --- -- 80 m ... I1 I0 - - - -- - - - 0 - _ --- -------- - -- - ---- --- so °' 33 m — _ - t t TT — wF m CO O O O O O O O O O O a0 f0 c f7 N •- m" IO o c') N .- CO ,p 7 C) N co. 0 .Q m N _tOO Z N O CO CO V t7 N t - O O C. O O5 O O O O O O (f) m GR/,.N SIZE IN MILLIMETERS COARE iFINECOARSE ) MEDIUM FINE Cil W m COBBLES GRAVEL SAND FINES i m D - - _ DZ Boring or Depth Moisture PL r— Key Test Pit (ft.) USCS Description Content (%) LL Ocn g - z m (n —�-- TP-6 5 SM Gravelly, silty SAND. 16 17"; Z CD -a --.0.-- TP-9 1.5 SM Gravelly, silty SAND. 21 co _o___ TP-2 2 SM Silty, gravell y SAND. 18 Table A Probe Hole Data Forrest Creste Renton,Washington Depth Probe Hole (inches) Soil Description P-11 0.0- 9.0 Dark brown, silty SAND with charcoal and organics. 9.0-30.0 Reddish brown, silty SAND with gravel, moist, loose to medium dense. 30.0-36.0 Olive, gravelly, silty SAND,wet to very moist, medium dense to dense. (TILL) P-12 0.0- 12.0 Dark brown, organic rich topsoil. 12.0-24.0 Reddish brown, gravelly, silty SAND, wet, loose to medium dense. Heavy seepage at 18.0"-24.0" P-13 0.0- 8.0 Duff and Topsoil. 8.0-24.0 Reddish brown, silty SAND with gravel, roots to 18", moist, loose to medium dense. 24.0-26.0 Gray, gravelly, silty SAND, moist,very dense. (TILL) P-14 0.0- 8.0 Duff and Topsoil. 8.0-30.0 Reddish brown, , silty SAND with gravel, roots to 18", moist to very moist, loose to medium dense. 30.0-36.0 Olive, gravelly, silty SAND,very moist to wet,medium dense to dense. (Weathered Till). Moderate seepage at 24". Project No.T-1416 Table A(cont) Probe,Hole Data Depth Probe Hole (inches) Soil Description P-15 0.0-3.0 Topsoil 3.0-36.0 Reddish brown, ,silty SAND trace gravel, roots to 18",moist, medium dense. 36.0-48.0 Olive,silty SAND and SAND,wet,medium dense. 48.0-49.0 Gray,gravelly, silty SAND,very moist to moist, dense to very dense. (TILL) Light seepage at 4 feet. Project No.T-1416 iI APPENDIX C WETLANDS DETERMINATION REPORT Final Report to: Lenora Blauman, Senior Planner, City of Renton, King County, Washington Title: Determination of Wetlands and Other Waters of the United States for the Forrest Creste Property, King County, Washington Project: Forrest Creste 3-1086-1801-1.75 Prepared by: Susan Meyer, Wetland Specialist W&H Pacific 3025 112th Avenue NE Bellevue, Washington 98009 (206) 827-0220 Date: September 25, 1991 INTRODUCTION This report documents the results of field investigations of the Forrest Cresteproperty, located Po g in the City of Renton, King County, Washington. The property, approximately 11.7 acres, is located in the east half of the northeast quarter of the southwest quarter of Section 10, Township 23 North, Range 5 East. Specifically, the site is located in the City of Renton, east of Duvall Avenue NE, north of SE 124th Street (extended), and south of SE 121st Street (see Figure 1). Field investigations were initiated to assess the extent of wetlands on the subject property. Field visits were made to the site on January 2, 3, and 14, 1991 for the purpose of identifying and 'delineating wetlands. Based on this investigation, two wetlands were determined to be present. I 1' METHODOLOGY Wetlands at the site were identified using the three-parameter approach as outlined in the Federal Manual for Identifying and Delineating Jurisdictional Wetlands (Federal Interagency Committee for Wetland Delineation 1989), hereafter referred to as the Federal Manual. This document 1 represents a unified approach to wetland delineation, requiring three wetland parameters: f vegetation, soils, and hydrology. I�Hydrophytic (wetland) vegetation is macrophytic plant life growing in water, soil or on a substrate that is at least periodically deficient in oxygen as a result of excessive water content I'(Federal Manual). Plants are rated as to their Wetland Indicator Status (WIS) by a system developed by the U.S. Fish and Wildlife Service (USFWS). The rating system is shown at the bottom of Table 1. li USFWS (1988)has published the "National List of Plant Species That Occur in Wetlands" which {rates each species into a WIS. On-site vegetative communities were analyzed. Dominant vegetation was recorded and given a WIS. For an area to be considered a wetland vegetative community, 50 percent or more of the dominant vegetation must be rated as facultative or wetter. Hydric soils are defined as "those soils which are saturated, ponded, or flooded long enough during the growing season to cause anaerobic conditions which can support the growth and regeneration of hydrophytic vegetation" (Soil Conservation Service 1985). Hydric soil 'indicators include, but are not limited to low soil chroma, mottling, and gleying. Soil samples were taken with a Dutch auger and analyzed for hydric soil conditions, using the Munsell Soil Color Chart (1990). An area has wetland hydrology "when saturated to the surface or inundated at some point in time during an average rainfall year" (Federal Manual). Some positive indicators of wetland hydrology are standing water, soil saturation, surface scoured areas, and oxidized root channels. For an area to be considered a wetland, all three of these parameters must be present. The routine on-site determination method was used for sample data plots. Sample plots were located in representative community types within each wetland. Plots were also located on the wetland and upland side of the wetland boundary line. Plot locations are depicted in Figure 2. Field data sheets are in Appendix A. C-1 r o 405 KING COUNTY 4F�i' q( RENTON CITY UMTS 7. ri u4 z iii a� z 40. o N.E. 12TH ST. !\ 11 ' NE P�RKDR. IJ r ! , N.E. m • 10TH cid W. ST. z „Li.,,coZ i co N.E. u.i W < e , 7TH ST. a W W u O z Q — z .::*rims S.E.122ND ST. O •z 0z z LLI .... s 0 2 a CC LL — � '""" Ilkii PROPOSED ,, ' > SITE 2 N.E. 4TH ST. Er7r..171,1 S.E. 12sTH ST. OI. 2 2 �Oki 3PO m Q ui co a „i P 14 . , ._ m 10 eo ,n IA e F` le, F` hh')' SR-169 l Forrest Creste Vicinity Map Renton, Washington I PACIFIC Not to Scale Figure 1 C-2 Table 1. Wetland Species List Scientific Name Common Name Wetland Indicator Status Acer Macrophyllum big leaf maple FACU Agrostis spp. bentgrass NI* Alnus rubra red alder FAC Athyrium filix-femina lady fern FACW Carex spp. sedge NI Cornus stolonifera red osier dogwood FACW Fraxinus latifolia Oregon ash FACW Geranium spp. geranium FACU Geum macrophyllum large leaved avens FACW Oplopanax horridus devil's club FAC Phalaris arundinacea reed canary grass FACW Polystichum munitum sword fern NI Populus trichocarpa black cottonwood FAC Rubus discolor Himalayan blackberry FACU R. lasiniatus evergreen blackberry FACU R. spectabilis salmonberry FAC R. ursinus creeping blackberry NI Thuja plicata red cedar FAC * No indicator listed OBLU - Obligate Upland -- Plants that occur in wetlands less than 1% of the time FACU - Facultative Upland -- Plants that occur in wetlands less than 33% of the time FAC - Facultative -- Plants that occur in wetlands 33% to 66% of the time FACW - Facultative Wetland -- Plants that occur in wetlands greater than 66% of the time OBL - Obligate Wetland -- Plants that occur in wetlands greater than 99% of the time C-3 li Both wetland areas contained old fallen logs which provided a growing medium for upland species. Thus, a significant percentage of.dominant species within the wetlands are rated as upland. However, where these nurse logs were not present, facultative or wetter species persisted. In these instances, if hydric soils were present, the area was determined to be wetland or non-wetland (based on the problem area method of wetland identification described in the Federal Manual). SITE CHARACTERISTICS The Forrest Creste property consists primarily of an upland second growth forest community. Dominant tree species include Douglas-fir (Pseudotsuga menziesii), bigleaf maple (Acer macrophyllum), and red alder (Alnus rubra). There is a fairly dense understory dominated by salal (Gaultheria shallon), Oregon grape (Berberis aquifolium), sword fern (Polystichum munitum), salmonberry (Rubus spectabilis), and creeping blackberry (Rubus ursinus). Soils of the site were mapped by the Soil Conservation Service (SCS) as Alderwood gravelly sandy loam and Everett gravelly sandy loam (see Figure 3). Alderwood soil is described as 'being moderately well drained with rolling hills of 6 to 15 percent slopes. Everett soil is (described as being excessively well drained and formed on glacial outwash terraces. Neither soil type is not listed by the SCS as a hydric soil (Soil Conservation Service 1987). Most of the upland portions of the site slope westward toward Duvall Avenue NE. Off-site 'surface water appears to enter the property from the east and flow into the low areas to the west, 'via an intermittent drainageway which flows through the center of the property. The drainage 'channel is well defined in the steeper areas, but it becomes somewhat obscure in the flatter II areas. 'WETLANDS ,Functions and Values j Wetlands are considered to be valuable natural resources largely due to their functions in the ecosystem. Wetlands contribute to the control of water pollution and seasonal flooding, enhance groundwater exchange, and provide critical wildlife habitat. The water purification function of wetlands is directly related to sediment stabilization, toxics retention, and nutrient removal and transformation (Adamus et.al. 1987). These functions are performed through a variety of biological and chemical processes. Wetlands are valuable for flood control in lowlands where they provide storage capacity for excess runoff from surrounding upland areas and adjacent to rivers where they provide a buffering capacity. Storm water storage value varies according to wetland size, topography, surrounding land uses, and association with other wetland systems. Groundwater exchange is important in areas that experience dry seasons. This function is dependent on wetland location in the watershed, hydrologic regime, wetland size, and soil permeability. C-4 Duvall Ave. NE • (138th Ave. SE.) Plot A Plot C • Plot B Plot C Wetland 2 Area .03 acres A Plot B Wetland 1 Plot A Area .61 acres • • .) Forrest Creste Wetlands Map Renton, Washington N I PACIFIC 80 's° Scale in Feet C-5 Figure 2 III w I A .. . ' ' N , le, . W f Ak:-, 2 siii IL t _ all --, r L._J Of = NgES In fii r ....... "...... 1-1 N.E. 12TH A..0=_. uWi =: _ u� ■ 11113 aIII NI ..., 4 i ,,,,,:i.„,.„,,,.,„iigii:.iiiiiiik ll 1AIM ._ 405 �_ t _:; '.; (;:::::::::;;-:::;i- €€;=;;;:: €1:18TH ST. A NM Mall"' t 1110° MINI 111 I l ` - ll monfietin .ti.= _ € :i :._: E ?i. tST ST............_ •• �, �...••:�'::-:!::::.. ..PROPOSED(-I .116k11114 i N.EsTHST. -= _ - - °,�::: - IT _............_......_............ .. SE.::125TH ST. J N.E. 4TH ST. '...°-• \- •' ::as::-;:::-:::::::: :'•;::::: .... ie ,- :::.•' -- Telithirg 161 rilii11.1.1.i.::.ifill.:6::111:111 11:7:72:: 11.4111F. / 411.1.°P . ' r 4 Renton ---' IN i , . /0 '' t Legend _� 1— - - , • ♦ L 1 . Ell Alderwood gravelly �p AgC sandy loam 99 tom EvB Everett gravelly sandy - loam Fin/en-... MqA` F 44 , L (''''..N........................'----- --- 7 - `�� ti, --,„ c"wAY . s. \,. ,.\ jil ____ Forrest Creste Renton, Washington Soil Conservation Service ii PACIFIC Soil Survey Map n Scale: 1" = 2000' N C-6 Figure 3 Wetlands which exhibit high values for wildlife habitat are structurally diverse in vegetation communities, both upland and wetland. Surrounding land uses also determine the wildlife habitat value of a wetland.Two areas on the site were found to exhibit wetland characteristics (see Figure 2). These areas were further investigated and identified as being wetlands. A complete list of all species found in the wetlands is in Table 1. Wetland 1 Wetland 1, which is 0.61 acres, is located next to Duvall Ave. NE, in the southwestern portion i f of the property. Only a small part of this wetland is located on the Forrest Creste property. The majority of the wetland exists on the adjacent property to the south. The off-site wetland appears to be approximately three acres in size. Wetland 1 (within property boundaries) would be classified as a palustrine forested wetland according to the USFWS classification system. The wetland, in its entirety, falls into the Class II category under the Department of Ecology's rating system. The on-site portion of this wetland is clearly dominated by red alder, black cottonwood (Populus trichocarpa), Oregon ash (Fraxinus latifolia), and salmonberry. Creeping blackberry, sword fern, and lady fern (Athyrium filix-femina) also dominate in the understory. Soils were very dark brown (7.5YR 2/0). This wetland receives water from runoff from the surrounding upland areas which slope directly into it. Overflow from the roadside ditch adjacent to Duvall Ave. NE also appears to accumulate in the wetland. Wetland 1, including the off-site portion, has high value for flood water storage, water quality improvement, and possibly, groundwater exchange due to its seasonal ponding nature and large size. Value as wildlife habitat is moderate to high due to the internal structural diversity of the wetland and the largely undeveloped adjacent uplands. Value as wildlife habitat is limited only by the close proximity of Duvall Ave. NE. Wetland 2 Wetland 2, which is 0.03 acres, is located in the extreme northwest corner of the property, adjacent to Duvall Ave. NE. Most of this wetland was filled sometime in the past, resulting in the small section left there now. The small remaining wetland would be classified as a palustrine shrub/scrub wetland as per the USFWS classification system. The wetland would probably be classified as Class III by the Department of Ecology's wetland rating system. This wetland, because of its small size would be exempt from wetland regulation according to the City of Renton's Ordinance No. 4346, Ch. 32 ("Wetlands Management"). Wetland 2 is mostly dominated by red osier dogwood(Cornus stolonifera),creeping blackberry,evergreen blackberry (Rubus lasiniatus), Himalayan blackberry (Rubus discolor), and red alder. Buttercup (Ranunculus repens) and large leaf avens (Geum macrophyllum) form a dominant herb layer. Reed Canary Grass (Phalaris arundinacea) and bentgrass (Agrostis spp.) are abundant on the periphery. Soils consisted of a dark muck (10YR 2/1). A portion of the fill material in the wetland is hydric soil (10YR 6/1 with 10YR 6/6 mottles). ip The soil was a very gravelly clayey loam that was piled into hummucks. The vegetation here C-7 consists of bentgrass, Himalayan blackberry, and geranium. This area was not included in the wetland area. Wetland 2 receives water from the roadside ditch to the north, and from adjacent upslope properties to the east. Thus it has a moderate value for storm water storage. Most other functions were lost upon filling of the wetland. I 4 h ; I - 1 Ste; C-8 i LITERATURE CITED Adamus, Paul R., ARA, E.J. Clairain, Fr., R.D. Smith, R.E. Young. 1987. Wetland Evaluation Technique: Volume IL Methodology. Dept. of Army, U.S. Army Corps of Engineers. Washington, D.C. Federal Interagency Committee for Wetland Delineation. 1989. Federal Manual for Identifying and Delineating Jurisdictional Wetlands. U.S. Army Corps of Engineers, U.S. Environmental -I Agency, U.S. Fish and Wildlife Service, and U.S.D.A. Soil Conservation Service, Washington D.C. Cooperative Technical Publication. 76 pp. plus appendices. _ ' Munsell Color. 1990. Munsell oil Color Charts. Macbeth, a Division of Kollmorgen ' Corporation. Baltimore, MD. Soil Conservation Service. 1987. Hydric Soils Qfhe United States., U.S.D.A. In Cooperation with the National Technical Committee for Hydric Soils. Soil Conservation Service. 1985. Hydric Soils of tg State of Washington. U.S.D.A. 10 pp. U.S. Fish and Wildlife Service. 1988. National List of Plant Species That Occur in Wetlands: 1988 Northwest (Region 9).L U.S.D.A. Biol. Rep. 88(26.9), In Cooperation with the National and Regional Interagency Review Panels. 39 pp. plus Synonomy. C-9 APPENDIX D DISTRIBUTION LIST OF DRAFT EIS DISTRIBUTION LIST OF DRAFT EIS State Department of Transportation U.S. Department of Agriculture Highway Administration Building Soil Conservation Office M/S KF-01 Renton Field Office Olympia, Washington 98504 935 Powell SW Renton, Washington 98055 State Department of Interior Fish and Wildlife Washington Natural Gas Co. Ecological Services Office 815 Mercer Street 2625 Parkmont Lane Seattle, Washington 98111 Olympia, Washington 98504 State Department of Game U.S. Army Corps of Engineers 600 N. Capital Way, M/S GJ-11 Seattle, District Office Olympia, Washington 98504 Engineering Division-Planning P.O. Box C-2755 City of Tukwila Seattle, Washington 98124 Planning&Building Department 6200 Southcenter Boulevard U.S. Department of Transportation Tukwila, Washington 98188 Department of Highways District 1 U.S. Department of HUD 6431 Corson Avenue S. ATTN: Mr. Nishimura Seattle, Washington 98108 Arcade Plaza Building 1321 Second Avenue Valley Daily News Seattle, Washington 98101 ATTN: City Editor P.O. Box 10 U.S. Energy Office Kent, Washington 98032 Washington State DOE Richard H. Watson, Director State Department of Fisheries 809 Legion Way SE, M/S SA-11 ATTN: Joe Roble Olympia, Washington 98504 Natural Production Division 115 General Administration Bldg., M/S Ax-11 Hearing Examiner's Office Olympia, Washington 98504 City of Renton Municipal Building Office of Program Planning& 200 Mill Avenue South Fiscal Management Renton, Washington 98055 ATTN: EIS Review 101 House Office Building Olympia, Washington 98504 D-1 II _ 1 J Mayor of the City of Renton Ms. Penny Bryant ATTN: Mayor's Assistant City of Renton Renton City Hall Police Department 200 Mill Avenue South 200 Mill Avenue South Renton, Washington 98005 Renton, Washington 98055 Planning/Building/Public Works Dept. Seattle-King County Municipal Building, 3rd Floor Department of Public Health 200 Mill Avenue South 400 Yesler Building Renton, Washington 98055 Seattle, Washington 98101 Seattle Post-Intelligencer SEPA Register Business News Washington State 101 Elliott Avenue W. Department of Ecology Seattle, Washington 98111 M/s PV-11 Olympia, Washington 98504 State Dept. of Agriculture Soils Conservation Service State Department of Ecology 3p0 - 120th NE ATTN: Terra Proden Bellevue, Washington 98005 Wetlands Section M/S PV-11 Renton Public Library Olympia, Washington 98504 Highlands Branch 2902 NE 12th EIS Review Coordinator Renton, Washington 98055 King County Courthouse Room 400 Seattle Times-Eastside Edition 516 Third Avenue Business News Seattle, Washington 98104 P.O. Box 70 Seattle, Washington 98111 King County Department of Public Works Hydraulics Division State Department of Ecology King County Administration Building Environmental Review Section Room 900 M/S PV-11 400 Fourth Avenue Olympia, Washington 98504 Seattle, Washington 98104 Renton Public Library METRO Main Branch Environmental Planning Division 100 Mill Avenue South 821 Second Avenue, M/S 63 Renton, Washington 98055 Seattle, Washington 98104 Parks &Recreation Dept. Muckleshoot Tribe Council City of Renton 39015 - 172nd Avenue SE 200 Mill Avenue South Auburn, Washington 98002 Renton, Washington 98055 Puget Sound Power&Light Co. ATTN: EIS Review South Central Division Office 620 S. Grady Way Renton, Washington 98055 D=2 ti _} King County Chief James Matthew Planning Division City of Renton 7th Floor, Smith Tower Fire Department i Seattle,Washington 98104 211 Mill Avenue South Renton, Washington 98055 King County Soil Conservation ATTN: Jack Davis Puget Sound Air Pollution Control Agency 935 Powell Avenue SW 200 W. Mercer Street, Room 205 Renton, Washington 98055 Seattle, Washington 98119-3958 METRO Journal American Transit Division 1705 - 132nd Avenue NE 821 Second Avenue Bellevue, Washington 98005 Seattle, Washington 98104-1598 Daily Journal of Commerce Pacific Northwest Bell P.O. Box 11050 ATTN: Harry Kluges Seattle, Washington 98111 1600 -7th Avenue, Room 1513 • Seattle, Washington 98191 City of Kent Planning Department Greater Renton Chamber of Commerce 220 -4th Avenue S. 300 Rainier N Kent, Washington 98032-5895 Renton, Washington 98055 Alda Wilkinson King County Public Library Executive Director ATTN: Susie Wheeler Boundary Review Brand 300 - 8th Avenue N. 3600- 136th Place SE Seattle, Washington 98109 Bellevue, Washington 98006-1400 King County Parks &Planning U.S. E.P.A. ATTN: Erik Stockdale Environmental Evaluations 1108 Smith Tower 1200 - Sixth Avenue, M/S Md-102 506 Second Avenue Seattle, Washington 98101 Seattle, Washington 98104-1598 King County SEPA Center, METRO Mr. Ralph Colby Water Quality Division Building&Land Development 821 Second Avenue 3600 - 136th Place SE Seattle, Washington 98104-1593 Bellevue, Washington 98006-1400 Puget Sound Council of Government 126 First Avenue S. Seattle, Washington 98104 Renton School District#403 435 Main Avenue S. Renton, Washington 98055 D-3 APPENDIX E RESULTS OF PUBLIC SCOPING MEETING RESULTS OF PUBLIC SCOPING MEETING FOR FORREST CRESTE Renton Senior Center June 26, 1990 - 7:30 p.m. A formal public scoping meeting for the Forrest Creste proposal was held June 26, 1990 at the Renton Senior Center. The City of Renton began the meeting by providing a brief overview of the proposed project and an explanation of the SEPA process. Meeting participants then organized into four small groups to offer their comments and thoughts concerning the potential impacts of the proposed development. Many issues were identified during the group discussions. These issues are summarized below. Soil, Air and Water • soil erosion impacts • air quality impacts • contamination of surface water • flooding, stormwater runoff and drainage concerns • protection of ground water Vegetation • removal of trees and wildlife habitat Noise • increased traffic and people in area Land Use • different land use for property, such as single-family homes • cumulative effects of multi-family development on Duvall Avenue NE • pressure for more annexation to Renton • effects of proposed project on single-family neighborhoods • potential for decrease in property value Aesthetics, Light and Glare • aesthetics and need for tree buffers • light and glare impacts Transportation • increased traffic volumes in neighborhoods • traffic congestion and need for left turn lanes • impacts on existing area roads • pedestrian and bicyclist safety • need for new traffic signals • need for sidewalks on Duvall Avenue NE • need for METRO and school bus stops near site E-1 Public Services • overcrowding in schools due to increased demand • safety of school children • demand on emergency services (police and fire protection) •jurisdiction issues between City and County (police and fire protection) • increased potential for crime in area • demand on sewer capacity • need for adequate water supply E-2 APPENDIX F HYDROLOGIC ANALYSIS HYDROLOGIC ANALYSIS The City of Renton requires that runoff controls be provided to reduce peak flows to pre-develop- ment levels based on criteria in the Surface Water Design Manual (King County, 1990). Specifically, the criteria require that peak flows from the site be limited to pre-developed levels for both the 2-year and the 10-year recurrence storms. In addition, flow resulting from the 100-year storm must be analyzed and significant downstream impacts of increased flow must be mitigated. A preliminary hydrologic analysis of the site was performed using the HYD computer program developed by King County to complement the Design Manual. Peak rates and volumes of runoff resulting from the 2-, 10-, and 100-year storms (24-hour duration) for both existing and developed Iconditions (before runoff control) are shown in Table D-1. Table F-1 Peak Runoff Rates & Volumes From the Project Site (Developed flow prior to runoff control) 24-Hour Peak Flow (cfs) Runoff Volume (cf) Rainfall Existing Developed Existing Developed 2-Year 2.10" 0.4 2.4 19,500 58,900 10-Year 2.95" 1.0 3.8 41,300 90,900 100-Year 3.95" 2.0 5.6 71,400 130,100 In order to reduce developed peak flows to pre-developed levels, a detention pond will be installed to store excess flows and release them slowly. Retention or infiltration of stormwater was not considered due to unsuitability of the soil and the presence of shallow subsurface water identified in the Geotechnical Report. Utilizing design criteria presented in the Surface Water Design Manual, a pond with a design volume of approximately 59,300 cubic feet was determined to be required (includes 30 percent increase in volume required as a factor of safety). At an assumed design depth of 5 feet with 3:1 side slopes, this pond would have top dimensions of approximately 100 feet by 190 feet including required freeboard. Final sizing and design of the detention pond will be performed during the design phase of the project. Table D-2 summarizes predicted outflow performance of the pond. F-1 Table F-2 Outflow Performance of the Detention Pond Inflow Peak Outflow Peak Existing (cfs) (cfs) Outflow (cfs) 2-Year 2.4 0.3 0.4 10-Year 3.8 0.8 1.0 100-Year 5.6 1.8 2.0 Storage provided to reduce the 2- and 10-year peak flows to existing levels will also reduce the developed 100-year peak flow to less than existing levels. Based on this analysis, this project should result in no additional problems in the downstream conveyance system caused by increased peak flows. F-2 APPENDIX G LAND USE ANALYSIS ANALYSIS OF THE CITY OF RENTON COMPREHENSIVE PLAN IN RELATION TO THE PROPOSED ACTION Following is an analysis of the applicable policies of the City of Renton Comprehensive Plan and the consistency of the Proposed Action with them. (Policies directly quoted from plan documents are in bold type.) City of Renton Comprehensive Plan ENVIRONMENTAL GOAL: TO ESTABLISH AND MAINTAIN A HARMONIOUS RELATIONSHIP BETWEEN THE DEVELOPED COMMUNITY AND ITS NATURAL ENVIRONMENT. A. BALANCED DEVELOPMENT OBJECTIVE: In order to maintain an acceptable quality of life, land use decisions should be based on balance of public services, economic feasibility and environmental considerations. Policies: 1. Adequate transportation capacity and utilities necessary to service new development should be available or provided in conjunction with actual development. This policy would indicate that the project should not be approved without providing for street improvements necessary for safe turning movements into the site, adequate signalization at affected intersections, street capacity, sewer capacity, water flow for domestic use or fire protection, and storm drainage control. Transportation improvements and utilities required by the project are discussed in the appropriate sections of this EIS. 2. Urban development should be permitted when it is compatible with the natural and human environment. Analysis of impacts of the proposed project as required by the State Environmental Policy Act is the implementation tool for this policy. This EIS has been required to assure that the compatibility of the project with the natural and human environment is considered. These issues are discussed in detail in the appropriate sections of this EIS. G-1 'F I 3. Urban development should compensate for the services it requires. Compliance with this policy would require that the project proponent pay fees or set aside funds to pay for additional services required beyond those compensated by normal taxation.. This could be required as a mitigation measure for service impacts identified in this document consistent with city regulations regarding mitigation payments. 4. Fees and charges should be commensurate with the cost of providing capital improvements for new development. To be consistent with this policy the project proponent would be required to pay fees for a proportionate share of the capital improvements required because of the impacts of the proposed development. This would have to be consistent with city regulations regarding mitigation payments. h i C. OPEN SPACE OBJECTIVE: Open space should be obtained and retained in selected areas. Policies: 1. Existing open space that serves a public purpose should be retained and made available for a variety of open space uses. The site provides useable public open space in the form of trail corridors. Other portions of the site would be retained in open space to meet other purposes such as storm drainage management; and protection of wetland areas. 2. Natural vegetation,ravines,slopes and waterbodies should be preserved to obtain open space. The site plan designates natural vegetation areas in the trail corridors, in wetland areas and on the boundaries as open space. They are however, mostly linear in nature and do not necessarily maintain the existing character of the site. 3. Open space should be located throughout the City and incorporated as an integral part of all development. Open space has been designated in the site plan. G-2 4. Open space elements should be combined to form a visual and physical separation between major sectors of the City. An open space buffer zone has been provided on the boundaries of the site adjacent to the single-family areas to the north and east. The buffer zone does not appear to be adequate to provide a substantial physical or visual separation. 5. Areas or strips of open space should be retained and enhanced to serve as buffers. The site plan provide areas of open space and buffer strips. 6. Open space areas should not be considered as a reserve for non-open space uses. If an overriding public purpose requires the use of open space land, a comparable replacement site should be provided. The proposed open space areas do not appear to be proposed for non-open space use. 7. Multiple uses of open space land should be encouraged, provided that the uses are compatible and adequate area is provided for each function. Open space areas are not proposed for multiple use on the site plan. 8. Open space which is used to preserve views should be retained. The site does not provide views from any location. E. VEGETATION OBJECTIVE: To preserve scenic beauty, prevent erosion, protect against floods and landslides, minimize air pollution, and reduce storm drainage system costs. Policies: 1. Desirable natural vegetation should be retained wherever possible. Vegetation is proposed to be preserved in trail corridors, wetland areas and in perimeter buffer zones only. It is not indicated if natural vegetation will be preserved at other locations on the site; it would be more consistent with this objective to do so. 2. In unique and/or fragile areas, desirable natural vegetation should be retained or enhanced. The two wetland areas on the site will be left undisturbed and a buffer zone will be retained. 3. Healthy trees should be retained where possible. G-3 This policy would indicate that trees should be retained on all parts of the site and not just in buffers or open spaces. This could be required as a mitigation measure. G. SURFACE DRAINAGE OBJECTIVE: To remove harmful materials and sediments, replenish groundwater resources, and minimize erosion and floods, surface drainage should be controlled. Policies: 1. Stormwaters should be retained on-site and then released at a natural rate and quality. The City's storm drainage system should be designed to incorporate natural drainage features. } On-site detention will be required by City regulations. 2. Precipitation should be returned to the soil at natural rates near where it falls. r ' The site plan does not indicate use of the existing drainageway to accommodate stormwater which would be more consistent with this objective. 3. Development should be designed to facilitate percolation and to minimize impermeable surfaces. t i , The use of biofiltration and stormwater retention would be more consistent with this policy and may be required as mitigation measures. 4. Development should include appropriate design and/or equipment to ensure clean runoff. Appropriate stormwater management design and management will be required under - the provisions of the City of Renton stormwater management ordinance which is based on the King County Stormwater Management Manual. • G-4 URBAN DESIGN GOAL: TO PROMOTE AESTHETIC AND FUNCTIONAL HARMONY AND TO PROVIDE PROPER BALANCE OF RESIDENTIAL, COMMERCIAL AND INDUSTRIAL AREAS. A. LAND DEVELOPMENT OBJECTIVE: Growth and development should occur in a timely and logical progression of the existing urban area to maximize the use of existing services. 1. To minimize the necessity for redevelopment, fttiiiyre development should only be allowed where it can be shown to be compatible with future uses in the vicinity. The project is in-filling on lands designated in the comprehensive plan and zoning code for urban development in response to current and planned population growth. Development of the site would not be premature development unless streets, utilities and services are inadequate to serve the site or there is an oversupply of the type of housing planned. These issues are discussed in the appropriate sections of this document. 3. Vacant land surrounded by developed land should be given priority for development. The Proposed Action is only partially surrounded by developed land. Single-family development is located on the north and east boundaries of the site; land to the south is vacant and properties west of Duvall Avenue NE are vacant. None of the vacant properties or the site itself are yet zoned for development at urban intensities although this area is designated for development under the Comprehensive Plan. Plans have been submitted and are under review by the City to rezone and develop properties to the west and south of the site at urban densities. 4. Land where adequate public utilities are available should be given priority for development. Utilities to service the site are currently available or planned for. Section 3.14 of this document provides detailed discussion of utilities for the proposal. C. LANDSCAPING OBJECTIVE: Landscaping should be used for buffering, screening less attractive activities and minimizing detrimental impact between uses. Policies: 1. Landscaping which enhances the primary design should be placed around all structures, in the interior of parking lots, and around the periphery of the site. G-5 2. Refuse and/or other unsightly areas should be screened and landscaped. 3. Landscaping which is suitable for screening and buffering should be provided between use areas. 7. All developed property should be appropriately landscaped. The project proponent proposes to provide landscaping on site to meet these objectives. In general the landscaping meets these guidelines. However, buffers on the north and east borders appear to be minimal. Retention of more natural vegetation and/or supplemental plantings could be included as mitigation to better achieve the intent of the guidelines. G-6 D. LANDSCAPING DESIGN AND MAINTENANCE OBJECTIVES: Landscaping should be designed and maintained to produce a desirable effect and to promote safety. Policies: 1. Use of qualified designers should be encouraged. 2. Materials and designs should reflect the function, scale, and type of area being designed. 3. An adequate irrigation system should be installed where appropriate. 4. Plant materials should be selected to promote safety and minimize interference with utilities and traffic. 6. Desirable natural vegetation should be incorporated into the design where appropriate. 7. Low maintenance landscaping should be encouraged. 8. All landscaping should be well maintained. 9. Landscaping that will improve wildlife habitats should be encouraged. 10. Landscaping should be compatible with significant natural conditions. The project proponent has proposed landscaping to meet these objectives. Although natural vegetation on the site has been incorporated into the site design, landscaped buffer areas appear to be minimal on the north and east boundaries. Natural vegetation could be retained more effectively to buffer the site from adjacent single- family neighborhoods, and to reduce storm drainage/habitat impacts. G-7 ti , RESIDENTIAL GOAL: TO ENCOURAGE SUITABLE HOUSING AND LIVING ENVIRONMENTS 1 A. NEIGHBORHOODS OBJECTIVE: Sound, viable neighborhoods should be created and/or maintained; and declining neighborhoods should be revitalized. Policies: 1. Housingdensities andto suit a varietyof familysizes, age groups, life types styles, and income levels should be encouraged. The Comprehensive Plan has indicated that multi-family and duplexes or townhouses are intended for this location. Provision of a specific location for uses other than single-family is consistent with the objective to provide a variety of housing types. 3. A balance should be sought or maintained between housing and the available access, utilities, and community facilities. If the utilities, access and communities facilities are not adequate to support the proposed project, approval of the project would not be consistent with this objective. 7. Entry into neighborhoods by other than local traffic should be discouraged. Because the proposed project is located on an arterial street and does not provide street connections to adjacent neighborhoods, it would be consistent with this objective. 8. Adequate access for emergency and service equipment should be required. The proposed site plan provides access for emergency equipment on Duvall Avenue NE. The internal circulation system would appear to provide adequate access to all parts of the site. 9. Housing alternatives should encourage a variety of choice in architectural design, physical location, building arrangement and ownership patterns. The proposed project will provide two distinct types of housing units, apartment flats and townhouses. It would be possible to vary the design and ownership patterns within the site. G-8 i B. HOUSING QUALITY OBJECTIVE: Only well designed, constructed, and maintained dwellings should be allowed. Policies: 2. Design and materials that minimize energy consumption should be encouraged. The project proponent has not indicated the type of materials that would be used on the project. 3. Dwellings should be designed to take advantage of views, site character, and other amenities. The dwellings do not appear to be sited to take maximum advantage of the natural vegetation and sloping site. Long, straight driveways and undifferentiated parking areas are not consistent with a park-like residential appearance. C. HOUSING DENSITY OBJECTIVE: The density and location of dwellings and mobile homes should take into consideration natural features, the character of the area, community facilities, utilities, and transportation facilities. Policies: 1. All dwellings and mobile homes should be connected to the public sanitary sewer system. The proposed project will be connected to the public sewer system. 2. All dwellings and mobile homes should have a full complement of urban utilities, access, and community facilities. This policy would relate to provision of sewer,water, emergency services, parks and other community facilities used by residents. Impacts of the project on these services are examined in detail in other sections of this document. 3. Multi-family dwellings and mobile home parks should be located near arterial streets to assure adequate access. The proposed project is located adjacent to an urban arterial street classified as a secondary arterial which is consistent with this objective. 4. Single-family dwellings should be buffered by low density multiple family uses from more intense uses. G-9 4.a. Medium and high density single-family uses should be considered as an alternative to low-density multiple family uses in buffering single-family areas from more intensive residential or nonresidential zoning. 5. Medium or high density multi-family dwellings should be a buffer between low density multi-family residential and more intensive uses. The purpose of this groupofpolicies is toprovide a transition in densitybetween PrP single-family uses and other residential and commercial uses, and to provide 'a gradual change in the intensity of uses and associated activities. The proposed project indicates that a row of townhouses (four to six attached dwelling units per structure) will be located on the north boundary of the project. These units would occupy approximately 20 percent of the site, and are separated from the high density units by a driveway only. Because of the very low density single-family areas adjacent to the site, this does not appear to be an adequate transition in density or building type between the single-family uses and the higher density multi-family on the balance of the site. 6. To provide for efficiency of access, utilities, and open space, areas of high residential density should be geographically concentrated and not spread indiscriminately. The Comprehensive Plan has indicated that multi-family units would be concentrated around the office park/commercial facilities on NE 4th St. The location of the proposed project at this site is consistent with this plan objective. 7. The design of multiple family dwelling sites and mobile home parks should achieve the same basic amenities within the development as generally available to single-family dwellings. Amenities common to single-family areas are low-scale buildings, attractive, well- maintained landscaping, limited areas of paving and open space. The proposed project partially provides these amenities, but the site design could meet this objective more consistently by reducing the bulk and scale of the buildings or reducing the number of units, and clustering them more tightly and moving them further away from single-family homes to the north and east of the property. 8. Multi-family dwellings and mobile home parks should be located near employment and shopping centers. The proposed project would be located near the commercial and office district located ~. on NE 4th Street. ; 9. Planned unit developments should be encouraged. I i The proposed project is not part of a planned unit development. G-10 TRANSPORTATION GOAL: TO PROMOTE A SAFE, EFFICIENT AND BALANCED MULTI-MODAL TRANSPORTATION SYSTEM. B. FACILITIES OBJECTIVE: Viable transportation facilities should be created and maintained and non-functional ones removed. Policies: 4. To achieve safe, convenient and efficient access, driveways should be limited to the minimum number necessary. The proposed project will have one road access to the arterial street. 6. The development of property should provide for public street improvements necessary to serve the site. Street improvements necessary to serve the site are discussed in the transportation section of this document. C. STREETS OBJECTIVE: Policies: it 3. To maintain arterial streets for the primary purpose of traffic movement,access from abutting property should be minimized. Access to the site is limited to provide safe, convenient access. 4. All City streets should be fully improved with a minimum number of curb cuts. The proposed project will be required to complete improvements such as sidewalks, lighting, and channelization that will meet full improvement standards. aR G-11 UTILITIES GOAL: TO ENSURE AN ADEQUATE SUPPLY AND EQUITABLE DISTRIBUTION OF UTILITY SERVICES. A. GENERAL OBJECTIVE: Utilities should be well planned, located, designed,constructed, and maintained and should be upgraded where necessary. Policies: 1. Developers and/or public and private utility agencies should provide a complete 1 utility system appropriate to the development. The proposed project will be required to provide a complete utility system. 2. Utilities should be designed to accommodate anticipated development of an area. Utility improvements will be designed to accommodate planned improvements to the utility system in the area. 4. Trunk utility lines should be installed at the time of urban development in accordance with a plan for the area. Local or service utility lines should be installed only as needed. Type and location of necessary utility trunk lines are discussed in the utilities section of this EIS. C. STORM DRAINAGE OBJECTIVE: An adequate storm draina ge age system which minimized the impacts on the natural drainage features should be assured. Policy: 3. New developments should be designed to provide for safe collection and discharge of runoff. The proposed project will be required to meet city standards for storm drainage collection and discharge. The potential impacts of storm runoff are discussed in a separate section in this document. G-12 Ij D. SANITARY SEWERS OBJECTIVE: An adequate sanitary sewer system should be provided. Policy: 1. All development should be connected to a sanitary sewer system. The proposed project will be connected to a sanitary sewer system. E. PARKS OBJECTIVE: Parks should be located,designed,constructed,maintained and preserved to provide for both active and passive recreation. Policy: 1. Large residential developments should indude parks. No parks are included in the development. 3. Multiple family developments should provide for on-site recreational activities. The proposed project provides a central pool, recreation building and children's play area. F. SCHOOLS OBJECTIVE: Schools should be located to serve the residents efficiently. Policy: 1. Large residential development should make provision for school sites. The impact of the project on schools is discussed in the appropriate section of this document. G-13 APPENDIX H TRAFFIC IMPACT ANALYSIS FORREST CRESTE TRAFFIC STUDY This traffic analysis was prepared for the proposed Forrest Creste development in northeast Renton. It presents an analysis of traffic operations within the proposed study area. The format of this report follows the Policy Guidelines fps Traffic Impact Analysis Qf New Development published by the City of Renton. The analysis is for anticipated conditions in 1993, which is referred to as the "forecast year." There is a proposed action on nearby property, known as The Orchards development. This is a large proposal that would have a significant impact on the traffic operations in the study area. Because The Orchards is still in the planning stages, traffic impacts for The Orchards development are not included. This report also analyzes the effect of the Forrest Creste proposal without the Orchards, as well as the effect of completing neither of the proposals. Using this information,mitigation and reasonable monetary developer contribution to the Transportation Benefit Zone can be assessed. PROJECT DESCRIPTION The Forrest Creste development is proposed as a 200-unit multi-family apartment complex on 11.9 acres (see Figure 1). It is located in Renton and is bounded by Duvall Avenue NE (within Renton), the proposed NE 6th Street (Renton), 140th Avenue SE (King County), and the Park Terrace subdivision (King County). The subject site lies inside the eastern boundary of the City of Renton. In addition to the Proposed Action, two alternatives of the development have been considered. Alternative 1 is a revised building layout (Site Plan B); the number and type of units would remain the same. The second is the No Action Alternative. The subject site would remain either undeveloped or develop at a density of one single family unit per acre. STUDY AREA BOUNDARIES - The Policy Guidelines fkr Traffic Impact Analysis Qf New Development dictate that the study area should include the intersections that would experience a 5% increase in peak hour traffic volumes as a result of the proposed development. The study area was anticipated at the outset of the project because it was not known which roadways and intersections would experience the 5% increase in traffic. Therefore, a preliminary study area was selected that encompassed signalized intersections along an east-west corridor. Then a final study area was determined based on those intersections that would experience a 5% or greater increase in traffic volumes. The preliminary and final study areas are shown in Figure 2. 1"r . ` EXISTING CONDITIONS The significant roadways that are carrying traffic are shown in Figure 3. These streets and their associated characteristics, such as number of lanes and existing traffic volumes, are summarized in Table H-1. Signalized intersections within the preliminary study area boundaries are shown in Table H-2. The table shows which of the signalized intersections were determined to have a 5% increase in traffic as a result of the proposed project. H -1 111•11 ` 0.9, Col, Not to Scale 405 KING COUNTY ��t'$- A RENTON CITY LMITS 's,- N .. a _ E r"1-- in us u1 z ui > L.,....1. , , c , a N Z E g00 JO• 0' $ �o 51 N vs• i .p 0 N.E. 12TH ST. 416 � ; IyFPgR� r4/ e 11 4',,,, my � N.E. 10TH y44/ ST. ui 6 y4 z z z N.E. ui ui > > a J 7TH c Z < < E a ST. w WO Z 0 ui .c z N £ o = w l?* ' S.E.122ND ST. in z O O to J >ii*M. N CrIX et a N J � �� _ — > PROPOSED 0 I _ !81ZT. 2 N E.4TH ST.5L SE. AI 1 35 mph 5L cs71.-:: . Q0 Div 3A0 co Uj )41) FQ LI 6n I43 t i9 1 .off F` le, F` 611')• SR-167 V Legend 35 mph Posted Speed limits 5L Number of Lanes ,I 4 'Forrest Creste ERenton, Washington Existing Lanes PACIFIC and Speed. Limits H-2 Figure 1 rr ` S9F COq4 Not to Scale (14 405 KING COUNTY F�- RENTON CITY LIMITS '7. N :---, iL—I-- wL., ., a �8 / � 0 �� // ��/••ie� Jo ■ 9�g0 ii��wo .mod lee I 1 w r 1 N.E. 12TH ST. ■ ■['1 s .5 : rd • I 1 ipP N.E. ■ x. ■ 10TH ■ ST. ui j ui ■ i ku W Z I !' ■ 1 Z' ■ `'� N.E. W i■ ■: 1 7TFI ST. w ■ ■ I Z! s , a > II.-. ui z ui i9 ( 12ST. W ■ Q ' • ' ■ 1 i U) J "'°" \PROPOSED I` A:/ Lu ; ' �`'�1. SITE N E. 4TH ST. JIJ S.E. 128TH ST. Q ui ui 1). .e.> 1 c iii m = en co — L tiY_ h►ly'Y SR- 169 .Legend • arm Preliminary Study Area •■■■■ Final Study Area 1 6 l 1 ' i_ • e 'Forrst Creste . , ERenton, Washington Study Area PACIFIC r H-3 Figure 2 l O C04, Not to Scale KING COUNTY i , 405 L._.. ls. N RENTON CITY LIMITS A. _- . ri---1------ Ili z . ul —m-1 > L . _ < Rd ...L. 0 0 Ride Lot z %ID* .,-. 0 2 4fk 4- 0 04 r i- 41.1 N.E. 12TH ST. DR, ri 1 N park N.E.IS' LLI rii...i end 10TH 7, Ride Lot, Ps, ST. LL.1 z z 11.—.,.---EMMEN ' a < 7TH ST. u, z _ : 0 0 Li, z Agr- - S.E.122ND ST. z 0 Lli 0 2 > < t ...J I — PROPOSED _, < I > n 0 I fi SITE / 2 N.E.4TH ST. S.E. 128TH ST. 0 iv 14 cn 1 4 ; - Lle7 . _ _ 90 • , . Ile 1141- SR-169 ...." 1 , - I , Forrest Creste Renton, Win - Major Roadways ashcTirT 1 E PACIFIC H-4 Figure 3 ; ! TABLE H-1 FORREST CRESTE SELECTED MAJOR ROADWAYS IN STUDY AREA STREET NUMBER AVERAGE POS 1 k,D OF LANES DAILY SPEED TRAFFIC LIMITS (ADT) 1990 NE 4th St 5 30,000 35 NE 3rd St 4 30,400 35 NE 10th St 2 8,000 30 • NE 12th St 2 10,000 30 NE Sunset Blvd 5 18,200 35 Edmonds Ave NE 2 7,000 30 Monroe Ave NE 4 7,000 25 Union Ave NE 2 4,000 30 Duvall Ave NE 4-5 7,000 30 H -5 I TABLE H 2 FORREST CRESTE MAJOR INTERSECTIONS IN PRELIMINARY STUDY AREA INTERSECTION 5% INCREASE Bronson Way N/Sunset Blvd NE N Maple Valley Hwy/I-405 NB off ramp N I Maple Valley Hwy/I-405 NB on ramp N NE 3rd St/Sunset Blvd NE N NE 3rd St/Monterey Dr NE/Bronson Wy NE N NE 3rd St/Edmonds Ave NE N I _ NE 3rd St/Jefferson Ave NE/NE 4th St Y NE 4th St/Monroe Ave NE Y NE 4th St/Union Ave NE Y NE 4th St/Duvall Ave NE Y SE 128th St(same as NE 4th St outside Renton City N limits)/138th Ave SE SE 128th St/144th Ave SE N SE 128th St/156th Ave SE N Park Ave N/I-405 SB ramps N + NE Park Dr/I-405 NB ramps N I , NE Park Dr/NE Sunset Blvd N NE Sunset Blvd/Edmonds Ave NE N NE Sunset Blvd/Harrington Ave NE N NE Sunset Blvd/NE 10th St N NE Sunset Blvd/NE 12th St N NE Sunset Blvd/Union Ave NE N NE Sunset Blvd/Duvall Ave NE Y Public Transportation System Metro Transit provides bus service on NE 4th Street(routes#111 and#147)and on Union Avenue(Route #114). There is also a route on Maple Valley Highway (Route#143) and on Union Street(routes #107, #108, and #114). The route on Maple Valley Highway includes van service (routes #912 and #913). The proposed development would lie less than 2,000 feet from the routes on Northeast 4th Street. This H -6 _ is considered a practical distance for an able passenger to walk for bus service. However, it may not be convenient for handicapped persons. Service on Maple Valley Highway is not within practical walking distance from the proposed project site. There are two park-and-ride lots in the vicinity, between 2' and 3'h miles from the site. The Renton Highlands lot is located near the intersection of NE 16th Street and Edmonds Ave, which is served by routes #106 and #111. The Boeing-Renton Park-and-Ride lot is near the corner of Park Avenue N and I-405. Because of the circuitous route between the park-and-ride lots and the proposed development, neither lot is convenient to the proposed site. The routes serving the lots may not reflect the destinations of the Forrest Creste residents, since regional transportation patterns show a growth in suburb-to-suburb trips, while these park-and-rides are primarily Seattle-oriented. Projected Traffic Volumes The anticipated 24-hour traffic volumes on the roadways in the study area are shown in Table H-3. These volumes are for the year 1993. The volumes were taken from the report Traffic Imnact Analysis for the Renton East Residential Development, (June 6, 1989, The Transpo Group) and were adjusted to Ir TABLE H 3 FORREST CRESTE PROJECTED ADT'S WITHOUT DEVELOPMENT, 1993 STREET AVERAGE DAILY TRAFFIC (ADT) fL NE 4th St 32,800 NE 3rd St 33,200 NE loth St 8,700 NE 12th St 10,900 NE Sunset Blvd 19,900 Edmonds Ave NE 7,600 - Monroe Ave NE 7,600 Union Ave NE 4,400 Duvall Ave NE 7,600 1993 volumes using a 3%per year increase in Average Daily Traffic(ADT). The volumes shown would be for the No-Action Alternative. lr , H -7 Accident History A recent accident history was prepared in the Renton East Residential Development report. The findings of that report for the 1986 through 1988 study period are: • Intersections in the study area have a frequency of 10 accidents per year or less, except the ; - intersection of NE 4th St/Union Avenue NE which has an accident frequency of 10.3 accidents per year. A frequency of 10 accidents per year is not considered unusual in King County. The accident rate at this intersection was 0.89 accidents per million entering vehicles, which for King County is also not considered to be unusually high for this type of urban area. • NE 4th Street between Monroe Avenue NE and Union Avenue NE has the highest accident 7 rate in the study area: 2.5 accidents per million vehicle miles. The average accident rate ' for King County is 2.4 accidents per million vehicle miles. The Renton East Residential Report concluded that accidents are not a significant issue. Also, experience has shown that accident rates usually remain fairly consistent for a specific street with minor fluctuations in traffic volumes. Therefore, the accident rates for the adjusted 1993 traffic volumes are judged to be an insignificant issue. r City-Planned Improvements The East Renton Transportation Benefit Zone (TBZ) will be affected by the project. Renton staff requested that the impact of Forrest Creste be assessed with respect to the TBZ project list in effect at the time of the initial proposal. The purpose of the TBZ is to provide a basis to assess development fees and manage transportation improvements for a geographical area. The proposed transportation improvements are listed in Table H-4, including which improvements lie inside the TBZ, and which are outside the TBZ. H -8 TABLE H-4 FORREST CRESTE PROPOSED IMPROVEMENTS WITHIN THE EAST RENTON TBZ IMPROVE- STREET LIMITS PROJECT DESCRIPTION IN MENT TBZ NUMBER 1 NE 3rd St Sunset Blvd to Monterey Dr Widen—add 2 additional travel lanes;intersection and signal modifications Y ' 2 NE 3rd St Monterey Dr to Edmonds Ave Widen—add 2 additional travel lanes;intersection and signal modifications Y 3 NE 3rd St Edmonds Ave to Jefferson Ave Widen—add 2 additional travel lanes;intersection and signal modifications Y 4 NE 4th St Jefferson Ave to Monroe Ave Widen—add 2 additional travel lanes;intersection and _ signal modifications Y 5 NE 4th St Monroe Ave to Union Ave Widen—add 2 additional travel lanes;intersection and signal modifications Y 6 NE 4th St Union Ave to Duvall Ave Widen—add 2 additional travel lanes;intersection and signal modifications Y 7 Edmonds At NE 4th St Realign Edmonds Ave to eliminate offset Y Ave NE 8 Maple Sunset Blvd to NB I-405 on/off Widen—add 2 additional travel lanes;intersection and Valley Hwy ramps signal modifications Y 9 Edmonds NE 3rd St to Monroe Ave Construct new 4-lane roadway section;modify signal Ave NE atNE3rdSt Y 10 Monroe Edmonds Ave to NE 2nd St Construct new 4-lane roadway section Ave Y 11 Monroe At Hillside;from lower Monroe Construct new 4-lane roadway section;major Ave Ave to approx.Edmonds Ave earthwork and retaining walls required Y 12 Monroe Maple Valley Hwy to Hillside Construct new 4-lane roadway section;new signal Ave installation at Maple Valley Highway Y 13 NE 6th St Monroe Ave to Union Ave Widen NE 6th St to 4 lanes and install curb,gutter, N and sidewalk. 14 I-405 At NE 3rd St Reconstruct undercrossing at I-405 to add 2 additional lanes in each direction,and to add curb,gutter,and sidewalk. The bridge reconstruction would also allow N for an additional lane in each direction on I-405. 15 Edmonds NE 4th St to Sunset Blvd Widen Edmonds Ave between NE 4th St and Sunset Ave NE Blvd.NE,and install curb,gutter,and sidewalk. N SITE GENERATED TRAFFIC VOLUMES The assessment of impacts is based upon an estimate of traffic that would be generated by the project. Research has been conducted by the Institute of Transportation Engineers (fit) to determine estimates of traffic generation. This information is published in the Trip Generation Manual (1988, 4th edition, Institute of Transportation Engineers). The resulting trip-ends are equated to a physical characteristic of the proposed development, such as number of units or square feet of space. H -9 { Daily, a.m., and p.m. peak hour trip generation from the Forrest Creste project was estimated using the equations from the Trip Generation Manual. Table H-5 shows trip-ends based on the land use for the Proposed Action and Revised Site Plan Alternatives. Forrest Creste is estimated to generate 1235 trips during a typical 24-hour period, with 104 trips generated during the a.m. peak hour, and 137 trips generated during the p.m. peak hour, using the formulas in the TTE manual. TABLE H-5 FORREST CRESTE TRIP GENERATION SUMMARY FOR PROPOSED ACTION , LAND USE DAILY A.M. PEAK P.M. PEAK TYPE TRIPS IN OUT IN OUT 19 85 93 44 PROPOSED 1,235 ACTION 104 137 SITE GENERATED TRAFFIC DISTRIBUTION Vehicle turning movement counts were collected at selected locations in the city. The counts were factored to 1993 volumes using a 3% per year growth factor. The turning movement counts at the intersections of NE Sunset Blvd./Duvall Avenue NE, and NE 4th St/Duvall Avenue NE were used to estimate the traffic on Duvall Avenue NE traveling north and south away from the proposed site. The volumes indicated that the distribution of traffic away from the site would be 69% of the traffic to the north on Duvall Avenue NE in the a.m. peak hour, and 31% of the traffic to the south on Duvall Avenue NE. These values have been rounded to 70% to the north and 30% to the south. The percent distribution of traffic on Duvall Avenue NE, NE Sunset Boulevard, and NE 4th Street is shown in Figure _. 4. These splits were used for the distribution of the Forrest Creste traffic. Table H-6 shows the 1993 anticipated ADT's after the proposed action. H -10 I •I TABLE H-6 FORREST CRESTE PROJECTED 1993 ADT'S WITH DEVELOPMENT STREET 1993 ADT WITH PROJECT NE 4th St 32,900 NE 3rd St 33,500 NE 10th St 8,700 NE 12th St 10,900 NE Sunset Blvd. 20,000 Edmonds Avenue NE 7,600 Monroe Avenue NE 7,600 Union Avenue NE 4,400 Duvall Avenue NE 8,500 Intersection Impacts It was determined that LOS would be calculated at intersections that show a 5% or greater peak hour increase over projected non-development traffic. Unacceptable levels of service (those below LOS D) should be mitigated. Table H-7 shows the intersections that would have an increase of 5% or more 3 during the indicated peak hour. These intersections were analyzed for level of service in the 1993 base year, and 1993 base year plus 1 project traffic. The analyses are based on the techniques of the Highway Capacity Manual (1985,Federal Highway Administration), and associated computer software. The results are shown in Table H-8. The intersection at NE 4th St/Union Avenue would require mitigation, as it would drop to an unacceptable level of service in the p.m. r, - a � H -11 rMO l cqF COg4 Not to Scale 405 KING COUNTY 4 RENTON CITY LIMITS h- N 1in....--r-- _ 50% ui L.., z se 1 00 1 4:7 10% N.E. 12TH ST. // 1 10% 1 NE708 70% .\ N.E. n 7.. 1 10TH I f ST. ui MI N j N.E. > z < a IIII 7TH ST. a g < — Z �� S.E.122ND ST. CC ± - PROPOSED '% 4' * 8 30% SITE 2 N.E.4TH ST. 20% _ 1 I S.E. 128TH ST. 2 III co Ili dl 0)1 ;4 391) # 1W e . X I= ir Li_ CO MI S CIM I. i 10% AF `,9 yk'Y SR-169 r L- i Forrest Creste Renton, Washington Trip Distribution for Forrest Creste PACIFIC H-12 Figure 4 TABLE H 7 FORREST CRESTE AFFECTED INTERSECTIONS INTERSECTION A.M. PEAK P.M. PEAK PERCENT PERCENT INCREASE INCREASE NE 4th St/Duvall Avenue NE 11.1% 7.9% NE 4th St/Union Avenue NE 7.5% 5.6% NE 4th St/Monroe Avenue NE 6.5% 5.9% NE 3rd St/Jefferson Avenue NE 9.7% 6.3% NE Sunset Blvd./Duvall Avenue 22.3% 10.2% NE TABLE H-8 FORREST CRESTE LEVELS OF SERVICE SUMMARY INTERSECTION 1993 NO BUILD 1993 PROPOSED PROJECT A.M./P.M. A.M./P.M. NE 4th St/Duvall Ave NE B/D C/D NE 4th St/Union Ave NE D/D D/E NE 4th St/Monroe Ave NE B/C C/C NE 3rd St/Jefferson Ave NE AB AB NE Sunset Blvd/Duvall Ave NE C/D C/D CIRCULATION In general, NE Sunset Blvd. and NE 4th Street carry the traffic in the east-west directions. This provides convenient access to I-405. Northbound and southbound traffic immediately adjacent to the site is carried by Duvall Avenue NE(also called 138th Avenue SE in King County). Adjacent roadways that also carry north-south traffic are Union Avenue NE, Monroe Avenue NE and 142nd Avenue SE. H -13 ti The existing roadway configuration allows traffic to travel to the west to access Interstate 405, or to continue to the west. The roadway configuration also allows travel to the north via Coal Creek Parkway. Coal Creek Parkway is an extension of Duvall Avenue NE to the north and provides access to the shopping and employment areas in Factoria and Bellevue. The existing congestion on I-405 is a factor in Coal,Creek Parkway becoming an alternative for north-south traffic. According to regional studies,travel patterns are taking on a more suburb-to-suburb character,rather than a suburb to Seattle character. Some Forrest Creste residents may travel to Seattle via SR 900 (Park Drive-Sunset Blvd.-Martin Luther King), however current travel times suggest that I-405/I-90 is faster. There are several plans underway to increase the capacity and relieve the congestion in the I-405 corridor. These are in the planning or construction stages, and include improvements to I-405 as well as those listed in the East Renton TBZ. The improvements to I-405 could be federally funded, and are currently not the responsibility of the developers in the TBZ. The improvements would allow reduction in congestion along the west edge of the TBZ. Emergency Vehicles Emergency vehicles include ambulances, fire trucks, and police vehicles. An important element of emergency vehicle circulation is the ability of the emergency vehicles to access the site. The nearest fire station is at the corner of NE 9th Street and Harrington Avenue NE. Access to the site for emergency fire vehicles is at two locations,both of which are convenient to the roadway network. The main access roadway would connect the site to Duvall Avenue NE, and would be for all vehicles. A second access would connect the northeast corner of the site to NE 6th St, and would be restricted to emergency vehicles only. There are clinics in the area that can provide medical care on an appointment basis. For emergency care, the area is served by Valley General Hospital. This facility is located to the south of the proposed site, near the City of Kent. Ambulance access is convenient to the site along NE 3rd St, then to I-405, and then to the Valley Freeway (Route 167). The distance to the hospital is approximately four miles. Police vehicles have easy access to the site along Duvall Avenue NE. Because of the nature of police protection, roving vehicles can be directed to the site by way of radio during an emergency. Existing circulation patterns would not affect the efficiency of police service. School Traffic The site is located in the Renton School District. Students in elementary school would attend the new Honey Dew Elementary School on Union Avenue. The nearest middle school is the McKnight Middle School, and high school students would attend Hazen High School. The Renton School District busing criteria are based on the type of school and the distance of the pupils home from the school. Elementary students that live greater than a one mile radius from the school can be bused. Middle School Students must live one and one-half miles or more from school before they can be bused, and High School Students must live two miles or more from school. Using these criteria, students would walk to the high school and elementary school, but would require busing to the middle school. H -14 For children walking to school from the site, the school district has published information regarding safe routes to school. In terms of vehicular circulation, the location of the site would pose no problems to vehicles or school buses traveling to and from a school. The Renton School District encourages "on-site" sidewalks at a development such as Forrest Creste for safety reasons. The school district also considers the proposed development large enough to warrant the placement of a school bus turnout on Duvall Avenue NE. Bus Routes Park and Ride Facilities The park-and-ride lot at the corner of NE 16th Street and Edmonds Avenue is served by routes#106 and #111. Access to the lot is by a circuitous route on existing roadways. It is unlikely that many persons living at Forrest Creste would travel between the site and the park-and-ride lot. The park-and-ride lot near Park Avenue N and I-405 requires traveling through the congested I-405 corridor. The lot is served by routes #107, #108, #109, #240, #245, #247, and #340. Although there are more routes to select from this lot, the access to the site is restricted, and it is not likely that many trips would travel between Forrest Creste and the park-and-ride lot. The conclusion is that there is adequate bus service for people who choose to walk from the site to a bus stop on NE 4th Street(routes#111 and#147), or drive to a park-and-ride lot. However, due to impaired access it is not likely that the routes at the park-and-ride lots would be used. Route #114 on Union Avenue is not practical for walking from the proposed site. The travel patterns from new suburban developments tend to be suburb-to-suburb.The routes which serve these two park-and-rides tend to serve the Seattle-destined market. The existing and future traffic patterns in the Forrest Creste area are assumed.to be suburb-to-suburb. The recent requirement for transportation demand management plans at major employers may provide subsidies and other incentives for Forrest Creste residents to use transit from these two park-and-rides. Equestrians There are no known equestrian trails or routes that are near the proposed project. For those using the existing roadway system, the change to equestrian circulation would be insignificant. Bicycle Routes • There are no established bicycle routes in the area, neither within Renton nor outside of the city in King County. Bicyclists, by law, can use the existing roadway system as long as they obey the rules-of-the- road. There is existing edge striping with raised pavement markers on selected roadways in the area, including NE Sunset Blvd. These are discontinuous,and the existing raised pavement markers may pose a hazard to bicycle traffic. These areas are not official bicycle routes. • Currently, the City of Renton is establishing bicycle route policy and the future circulation of bicycle traffic is uncertain. A bicycle route is proposed on Duvall Avenue NE; as of this writing the route has H -15 not yet been adopted. Preliminary documents suggest that it would be within the existing Duvall Avenue NE right-of-way. It is not likely that the proposed development would have a significant impact on existing bicycle circulation. IMPACT SUMMARY This section is a summary of the impacts based on the discussion of the previous text. The impacts evaluated where the traffic signals would have a 5% increase in traffic. In this report, automobile, bicycle, and equestrian traffic was evaluated, as well as pedestrian access to transit. The findings are: • Automobile traffic circulation patterns would remain essentially the same. Traffic that is attracted to Renton and other developed areas to the west would continue to use Sunset Blvd. NE and 4th Street NE as east-west corridors. Traffic that is intended for points north would use Duvall Avenue NE and continue north along Coal Creek Parkway. Longer trips to the north and south would use L-405. Traffic traveling to or from the south would tend to travel west on NE 4th Street or NE Sunset Blvd., and then use I-405 • The intersection of NE 4th St/Union Avenue NE would drop below level of service E for p.m. conditions at completion of the Forrest Creste proposed development. • Traffic circulation on Duvall Avenue NE would be affected by the proposed Forrest Creste. A previous recommendation to mitigate the impact was to eliminate the northern most driveway onto Duvall Avenue NE; provide additional right-of-way on 140th Avenue NE, provide a second access on NE 6th Street and construct the roadway to half-width from Duvall Avenue NE to the end;provide an additional emergency access in the northeast corner of the site from 140th Avenue NE. Based on these findings, it is recommended that these mitigation measures be implemented. • It is the responsibility of the developer to install on-site facilities for special-need vehicles. ' The Renton School District provides van service to and from school for handicapped students. On-site facilities for the handicapped, such as parking and loading areas would meet this requirement. • The Renton School District considers it a safety measure to install sidewalks on-site. They would also prefer a local bus turnout to aid bus circulation and reduce the chance of accidents. • The use of school buses by students is based on the distance from the nearest school. Those living at the site would be within walking distance of Hazen High School and Honey Dew Elementary School. Middle School students would need to be bused to McKnight Middle School. • There are no known established equestrian trails in the area. The effect on equestrian circulation would be insignificant. There are no established bicycle routes in the area. However, a bike route is proposed on Duvall Avenue NE. It is not anticipated that the H -16 . i development would have an impact on bicycle circulation. The bicycle route has not been adopted at the time of this writing. The draft documents suggest that the route would be within the existing Duvall Avenue NE right-of-way. IMPACT MITIGATION The mitigations for the proposed Forrest Creste development include revisions to traffic signal timing and contribution to the TBZ fund. Table H-9 is an estimation of the amount to be contributed by the developers of Forrest Creste. The table is based on the contribution, in 24 hours, of trips by the two developers, as a percentage of the total estimated increase in the TBZ at the point of "build-out" in the TBZ. According to the East Renton Transportation Benefit Zone Study, the total increase in trips at build-out would be 47,492 trips. Mitigation is proposed at the intersection of NE 4th St/Union Avenue NE, where level of service would drop below D. In this report three types of mitigation are considered: revise the traffic signal timing, add additional traffic lanes, and modify the traffic signal operation. The construction of additional lanes at intersections will have the greatest cost but will result in the greatest operational improvements because it adds additional capacity. The 1993 traffic signal operation and the mitigated traffic signal operation is attached as support documentation. The mitigation measures outline here are examples of possible mitigation measures for this project. The justification for these measures is shown with the analysis printouts using the Highway Capacity Software attached. The applicability of these types of measures will be subject to the design philosophies of the city. For example, it is recommended at the signalized intersection of NE Sunset Blvd./Duvall Avenue NE to install a "protective permissive" right turn movement. This type of mitigation would probably not be installed if it is not in conformance with city signal design standards. In those cases, alternative measures would be required. In the following descriptions, the key to the letter designations is as follows: • NB Northbound • SB Southbound • EB Eastbound • WB Westbound • L Left-turn-only lane • T Through-only lane • LT A single lane for left-turns and through movements • R Right-turn-only lane • TR A single lane for right-turns and through movements • LTR A single lane for left-, through-, and right-turn movements NE 4th St/Union Avenue NE —Add an additional through lane on the EB and WB legs and change the lane configuration from L-T-TR to L-T-T-R. Add an additional lane on the SB leg and change the lane configuration to L-T-R. Revise the traffic signal cycle length to 109 seconds. Install "protective- 1 permissive" right turn indications for the NB TR, WB TR, and EB TR movements. H -17 I _ TABLE H 9 FORRFST CRESTE ESTIMATE OF FUNDS TO BE CONTRIBUTED TO THE TBZ Specified Improvement Estimated Total New Trips Contributed by Cost Trips for Forrest Creste TBZ $1000's Volume % $1000's NE 3rd St- Sunset Blvd to Monterey 539 47,492 1235 2.60 14.01 NE 3rd St- Monterey Dr to Edmonds 1,160 47,492 1235 2.60 30.16 NE 3rd St-Edmonds to Jefferson 916 47,492 1235 2.60 23.82 NE 4th St-Jefferson to Monroe 557 47,492 1235 2.60 14.48 NE 4th St- Monroe to Union 1,430 47,492 1235 2.60 36,92 NE 4th St- Union to Duvall 1,091 47,492 1235 2.60 28.37 Edmonds Ave at NE 4th St 224 47,492 1235 2.60 5.82 Total 5,907 153.58 1 Additional Mitigation includes the following: • Adequate on-site circulation facilities for handicapped users including parking spaces,ramps, and turn- outs would be provided at appropriate locations. A school bus stop near the Orchards or Forrest Creste properties would be installed. • On-site circulation amenities such as sidewalks or pathways would be provided to aid pedestrian circulation, especially school children. The proponent would notify METRO of their proposals so that bus service could accommodate the development and the potential for constructing a bus shelter near the site could be considered. UNAVOIDABLE ADVERSE IMPACTS Forrest Creste, as for any other proposed development project in the study area, would add additional traffic to the existing street system. This added traffic is an unavoidable impact. However, in this case it is possible to mitigate the negative impacts that would result from this proposed project, and achieve the same operational level of service. H -18 OTHER SIGNIFICANT ISSUES During the public involvement process for the Forest Creste proposal, other transportation issues were raised. Based on the analysis of this report, the following conclusions were reached: • The placement of additional traffic signals in the corridor will not benefit the conditions that result from the proposed development. Generally, if traffic signals are placed without regard to traffic progression, traffic operation is impeded, and congestion increases. Therefore, no new traffic signals have been proposed. • The cumulative effect of urban development on the roadway system is a City-wide concern. Therefore, the developers should be required to pay money into the fund as required by the TBZ. However, there are no major improvements, such as extensions to 138th Avenue NE and 142nd Avenue NE, that will be required as a result of the proposed development. • Roadside debris is an important social issue. Although it is not considered a transportation issue, it is reasonable that, if there are more vehicles, then there are more people to throw out litter. Littering is governed by the State Vehicle Code and is controlled as a police function. Experience has shown a dramatic reduction in the amount of littering in the past two decades as a result of increased anti-litter campaigns and increased fines for litter conviction. The amount of litter will increase, but will occur as a result of natural traffic increase. • Although bicycle routes are an important issue, there are no official bicycle routes in the vicinity of the project. A Bicycle Route designation is proposed for Duvall Avenue NE, but has not been approved at the time of this writing. The draft bicycle route document indicates that the route would be within the Duvall Avenue NE right-of-way. Because there are no existing bicycle routes, there is no need to upgrade them. • The current roadway system achieves level of service E or F near the I-405 corridor, which explains the tendency of vehicles to use Coal Creek Parkway to travel north. However, during non-peak hours the level of service is C or better. Although existing conditions indicate that improvements are needed to raise the level of service,the inclusion of traffic from Forrest Creste will not degrade the level of service. Therefore, no reconstruction or action to the I-405 corridor will be required as part of this project. • The definition of public transit includes carpooling and vanpooling, as well as buses and rail systems. Currently, there are no rail systems planned to serve the area; however, there is bus service in the vicinity. Transit service planning is based on many criteria that are outside of the scope of this report. Bus service is regulated by Metro, and is revised on a regular basis based on demand and ridership. The service plans are updated several times yearly, with major changes occurring less frequently. Recent service improvements were made to upgrade bus service to Southeast King County in 1991, and more changes are being proposed for 1992-93. The developers of the Orchards and Forrest Creste projects should notify Metro of their plans so that transit concerns can be incorporated into the project plans. The installation of a school bus stop near the Orchards or Forrest Creste properties is a recommended mitigation in this report. H -19 'P li • Based on engineering judgment,the distance from the Forrest Creste driveway on Duvall Avenue NE and the signalized intersection at NE 4th Street is adequate for circulation. The access configuration on Duvall Avenue NE and the emergency access at the northeast corner of the property are judged sufficient for traffic circulation. H -20 BIBLIOGRAPHY The Transpo Group,Traffic Impact Analysis for thg Renton East Residential Development. Prepared for Northward Properties, June 6, 1989. CH2M Hill, The East Renton, Transportation Benefit Zone Study. Prepared for the City of Renton, March 1989. Institute of Transportation Engineers (riB), Trip Generation Manual, (1988) ITE Publication Number IR-016B. Federal Highway Administration, Highway Capacity Manual, (1985). Federal Highway Administration, Highway Capacity Software, (1985). City of Renton, Policy Guidelines kr.Traffic Impact Analysis Qf New Development, (1988). r—, i t H -21 SUPPORT DOCUMENTATION ONE 1993 NO-BUILD SIGNALIZED INTERSECTION LOS 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4TH STREET/DUVALL AVE NE AREA TYPE OTHER ANALYST BLS DATE 7/27/90 TIME AM COMMENT 1993 NO BUILD-FCAMNB1 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 91 8 36 136 : L 12.0 L 12. 0 LTR 12 . 0 L 12.0 TH 348 787 30 1 : T 12 .0 T 12. 0 12 . 0 TR 12. 0 RT 13 285 6 92 : TR 12 .0 TR 12. 0 12 . 0 12 . 0 RR 3 71 1 23 : 12 .0 12. 0 12 . 0 12.0 • 12 . 0 12. 0 . 12 . 0 12.0 12. 0 12. 0 12 . 0 12 . 0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2 . 00 N 0 2 0.90 5 Y 16.8 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 16.8 3 NB 0. 00 2. 00 N 0 2 0.90 5 Y 25.8 3 SB 0. 00 2. 00 N 0 2 0.90 5 Y 25.8 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X X NB LT X TH X X TH X RT X X RT X PD PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 7. 0 16. 0 38. 0 0.0 GREEN 21. 0 0. 0 0. 0 0.0 YELLOW 2 . 0 2 . 0 2. 0 0.0 YELLOW 2 . 0 0. 0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0. 199 0. 711 3 .4 A 4 .7 A TR 0. 194 0. 611 5. 0 A WB L 0. 079 0. 067 30. 0 D 17.9 C TR 0. 827 0.411 17.8 C NB LTR 0. 243 0.222 18.7 C 18.7 C SB L 0.425 0.222 23 .4 C 21.7 C TR 0.232 0.222 18. 6 C INTERSECTION: Delay = 14.9 (sec/veh) V/C = 0.530 LOS = B ' I 1 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** P, INTERSECTION NE 4TH STREET/DUVALL AVE NE AREA TYPE OTHER 1 ANALYST BLS DATE 7/27/90 TIME PM COMMENT 1993 NO BUILD-FCPMNB1 1 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB', LT 147 9 20 456 : L 12. 0 L 12. 0 LTR 12 . 0 L 12.0 TH 1259 556 2 48 : T 12. 0 T 12. 0 12 . 0 TR 12.0 RT 58 218 12 146 : TR 12. 0 TR 12. 0 12 . 0. 12. 0 l ; RR 15 55 0 37 : 12. 0 12. 0 • 12 . 0 121.0 12. 0 12. 0 12 . 0 12 .0 12. 0 12.0 12 . 0 12.0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2 . 00 N 0 2 0.90 5 • Y 11.5 3 I ' WB 1 0. 00 2 . 00 N 0 2 0.90 5 Y 11.5 3 NB 0.00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SB 10. 00 2.00 . N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X X NB LT X TH X X TH X RT X X RT X PD PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 5. 0 26. 0 24. 0 0. 0 GREEN 27. 0 0. 0 0. 0 0.0 YELLOW 2. 0 2 . 0 2 . 0 0. 0 YELLOW 2 . 0 0. 0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.248 0. 644 5.2 B 10. 1 B _� TR 0.759 0.567 10. 6 B WB L 0. 133 0. 044 31.5 D 34 .4 D ' TR 0.958 0.256 34.4 D NB LTR 0. 116 0.289 15.2 C 15.2 C SB L 1. 086 0.289 85.7 F 68. 1 F TR 0. 382 0.289 16.8 C INTERSECTION: Delay = 28.6 (sec/veh) V/C = 0.833 LOS = D 1 1_ 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** 1 INTERSECTION NE 4th Street/Union Ave NE AREA TYPE OTHER ANALYST BLS DATE 01-27-1992 TIME AM COMMENT 1993-NO PROJECT-FCAMNB2 VOLUMES : GEOMETRY EB WB NB SB : EB WB NB SB LT 67 44 191 47 : L 12.0 L 12. 0 LT 12.0 LT 12.0 TH 288 1278 62 16 : T 12.0 T 12.0 TR 12.0 TR 12.0 RT 34 59 85 145 : TR 12.0 TR 12.0 12.0 12.0 RR 9 15 21 44 : 12.0 12.0 12. 0 12 .0 : 12. 0 12.0 12.0 12. 0 • 12.0 12 .0 12.0 12 .0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0.00 2.00 N 0 2 0.90 5 Y 19.8 3 WB 0. 00 2. 00 N 0 2 0.90 5 Y 19.8 3 NB 0. 00 2.00 N 0 2 0.90 5 Y 25.8 3 SB 0.00 2.00 N 0 2 0.90 5 Y 25.8 3 SIGNAL SETTINGS CYCLE LENGTH = 110.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X X RT X PD X PD X WB LT X SB LT X TH X TH . X RT X • RT X PD X PD X GREEN 8. 0 6. 0 50. 0 0. 0 GREEN 18. 0 18. 0 0.0 0.0 YELLOW 2. 0 2.0 2.0 0. 0 YELLOW 2.0 2.0 0. 0 0. 0 LEVEL OF SERVICE , LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.322 0. 136 32.9 D 13 .2 B TR 0.201 0.518 9.2 B WB L 0.454 0. 064 39.8 D 31.2 D TR 0.980 0.445 31. 0 D - NB L 0.811 0.155 45.9 E 39.4 D r TR 0.557 0.155 29.5 D SB LTR 0.390 0. 155 27.3 D 27.3 D INTERSECTION: Delay = 29. 0 (sec/veh) V/C = 1.037 LOS = D • 1j , i 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4th Street/Union Ave NE 1 AREA TYPE OTHER ANALYST BLS DATE 01-27-1992 TIME PM COMMENT 1993--No Project--FCPMNB2 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 341 110 94 173 : L 12.0 L 12.0 LT 12. 0 LT 12.0 TH 1152 585 93 123 : T 12.0 T 12.0 TR 12.0 TR 12.0 1 ' RT 227 118 93 184 : TR 12.0 TR 12.0 12.0 12 .0 RR 57 30 23 46 : 12.0 12.0 12.0 12.0 : 12.0 12.0 12. 0 12.0 : 12.0 12. 0 12.0 12 .0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE ! ' (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2 .00 N 0 2 0.90 5 Y 14.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 NB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SB 0. 00 2.00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 102. 0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH ° X j RT X RT X PD X PD X GREEN 12 . 0 16.0 28.0 0.0 GREEN 18.0 18. 0 0. 0 0.0 YELLOW 2 . 0 2.0 2 .0 0. 0 YELLOW 2 . 0 2. 0 0. 0 0. 0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.787 0.284 31.4 D 33 .8 D TR 1. 005 0.441 34.4 D WB L 0. 669 0.108 39.4 D 29.3 D TR 0.853 0.265 27.7 D NB LTR 0.537 0. 167 25.8 D 25.8 D SB LTR 0.918 0.167 39.4 D 39.4 D INTERSECTION: Delay = 32.8 (sec/veh) V/C = 1. 086 LOS = D 1 I 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY. REPORT ************************************************************************** INTERSECTION NE 4TH STREET/MONROE AVE NE AREA TYPE OTHER ANALYST BLS DATE 7/27/90 TIME AM COMMENT 1993-NO PROJECT-FCAMNB3 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 41 31 102 31 : L 112.0 L 12 .0 LT 12. 0 LT 12. 0 TH 397 1804 32 11 : T 12.0 T 12 .0 TR 12. 0 . TR 12.0 RT 35 78 49 116 : TR 12 .0 TR 12 .0 12.0 12.0 RR 9 20 12 8 : 12 . 0 12.0 12.0 12.0 .• 12 . 0 12 .0 12.0 12.0 . 12 .0 12 .0 12. 0 12. 0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 NB 0.00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SB 0.00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 . PH-2 PH-3 PH-4 PH-1 . PH-2 PH-3 PH-4 EB LT X NB LT . X TH X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH. X RT X RT X PD X PD X GREEN 4. 0 62.0 0. 0 0.0 GREEN .18. 0 0. 0 0. 0 0. 0 YELLOW 2 . 0 2 . 0 0. 0 0.0 YELLOW 2 .0 0. 0 0. 0 0. 0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.807 0.033 69.3 F 9. 1 B TR 0.207 0. 678 3 .5 A WB L 0. 610 0. 033 44.2 E 11.8 B TR 0.907 0. 678 11.3 B NB L 0.439 0. 189 25.3 D 23 .2 C TR 0.251 0. 189 20.2 C SB LTR 0.299 0. 189 20.3 C 20.3 C INTERSECTION: Delay = 12.5 (sec/veh) V/C = 0.805 LOS = B 1 -- 1 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ****************************4c**ie*************4e***ir*************9r*****ie**** INTERSECTION NE 4TH STREET/MONROE AVE NE AREA TYPE OTHER ANALYST BLS DATE 7/27/90 r TIME PM COMMENT 1993-NO PROJECT-FCPMNB3 j VOLUMES GEOMETRY ,EB WB NB SB : EB WB NB SB LT 216 65 75 163 : L 12. 0 L 12. 0 LT 12. 0 LT 12.0 TH 1418 69 51 62 : T 12. 0 T 12. 0 TR 12.0 TR 1210 , RT 124 71 61 104 : TR 12. 0 TR 12. 0 12 . 0 1210 1 RR f�31 18 12 26 : 12.0 12. 0 12. 0 1210 !- ' .• 12 .0 12. 0 12. 0 12! 0 . 12 .0 12 . 0 12. 0 12.0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0.00 2. 00 N 0 2 0.90 5 Y 14.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 NB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X ' TH X X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN ! 10. 0 6. 0 48. 0 0. 0 GREEN . 18. 0 0. 0 0. 0 0.0 YELLOW 2 . 0 2 . 0 2. 0 0. 0 YELLOW 2. 0 0. 0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS ,' 1 EB I L 0.751 0. 189 32 .7 D 13 . 1 B 1 TR 0. 821 0. 611 10.4 B WB L 0.427 0. 100 30. 0 D 14.7 B TR 0. 082 0.522 6.9 B NB L 0. 383 0.189 24 .8 C 22 .5 C I TR 0.361 0. 189 20.8 C SB L 0.719 0. 189 32 . 5 D 27.7 D TR 0. 509 0. 189 22 .2 C INTERSECTION: Delay = 15.7 (sec/veh) V/C = 0.755 LOS = C , 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4TH ST/NE 3RD ST/JEFFERSON AVE NE AREA TYPE OTHER ANALYST BLS DATE 7/27/90 TIME AM COMMENT 1993-AM NO BUILD-FCAMNB4 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 14 18 13 14 : L 12 .0 L 12 .0 LTR 12. 0 LT 12. 0 TH 506 1052 1 5 : T 12 . 0 T 12 .0 12. 0 R 12. 0 RT 35 96 13 56 : TR 12. 0 TR 12 .0 12 . 0 12. 0 RR 4 24 3 14 : 12. 0 12. 0 12. 0 12. 0 12. 0 12 .0 12. 0 12. 0 • 12 . 0 12 .0 12 . 0 12. 0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2 . 00 N 0 2 0.90 5 Y 11.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 11.5 3 NB 0. 00 2 . 00 N 0 2 0.90 5 Y 20. 5 3 SB 0. 00 2 . 00 N 0 2 0.90 5 Y 20. 5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X NB LT X TH X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 68. 0 0. 0 0.0 0.0 GREEN 18.0 0. 0 0. 0 0. 0 YELLOW 2 . 0 0. 0 0. 0 0.0 YELLOW 2 . 0 0. 0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0. 091 0.744 2 .4 A 2 . 3 A TR 0.239 0.744 2 . 3 A WB L 0. 032 0.744 2 . 3 A 3 . 1 A TR 0. 501 0. 744 3 . 1 A NB LTR 0. 102 0. 189 19.5 C 19.5 C SB LT 0. 063 0. 189 19.4 C 19. 6 C R 0. 163 0. 189 19.8 C INTERSECTION: Delay = 3 . 6 (sec/veh) V/C = 0.433 LOS = A I 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4TH ST/NE 3RD ST/JEFFERSON AVE NE AREA TYPE OTHER ANALYST BLS DATE 7/27/90 j 1 [ TIME PM COMMENT 1993-NO BUILD-FCPMNB4 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 90 21 56 23 : L 12. 0 L 12. 0 LTR 12. 0 LT 12.0 TH 1683 810 8 1 : T 12.0 T 12.0 12 .0 R 12.0 RT 20 23 28 153 : TR 12 .0 TR 12. 0 12.0 12.0 ' RR 4 24 3 14 : 12 .0. 12. 0 - 12 .0 12.0 .• 12.0 12. 0 12. 0 12.0 12.0 12. 0 12 . 0 12 .0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T j EB 0. 00 2 . 00 N 0 2 0.90 5 Y 11.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 11.5 3 NB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SB 0.00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X NB LT X ! TH X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN; 68. 0 0. 0 0. 0 0. 0 GREEN 18. 0 0. 0 0. 0 0!,.0 YELLOW 2 . 0 0. 0 0. 0 0. 0 YELLOW 2 . 0 0. 0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0. 247 0.744 2 .8 A 4.9 A TR 0.750 0.744 5. 0 B WB 1 L 0.292 0.744 3.5 A 2 . 6 A TR 0. 358 0.744 2. 6 A NB LTR 0.537 0. 189 23. 3 C 23 . 3 C SB LT 0. 085 0. 189 19.4 C 22 .2 C R 0.544 0. 189 22.7 C INTERSECTION: Delay = 5.8 (sec/veh) V/C = 0.709 LOS = B , I 1 I 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION DUVALL AVE NE/NE SUNSET BL AREA TYPE OTHER ANALYST BLS DATE 7/27/90 TIME AM COMMENT 1993-NO BUILD-FCAMNB5 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 118 30 39 34 : L 12. 0 L 12. 0 LT 12 .0 LT 12.0 TH 125 224 210 121 : T 12.0 T 12.0 TR 12. 0 TR 12.0 RT 20 25 12 144 : TR 12. 0 TR 12. 0 12 .0 12.0 RR 5 6 3 36 : 12.0 12 .0 12. 0 12. 0 • 12. 0 12. 0 12 . 0 12. 0 : 12. 0 12 .0 12.0 12. 0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 WB 0. 00 2. 00 N 0 2 0.90 5 Y 14.5 3 NB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 . 3 SB 0. 00 2. 00 N 0 2 0.90 5. Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 -; EB LT X X NB LT X TH X X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 14 . 0 10. 0 28. 0 0. 0 GREEN 4. 0 24. 0 0. 0 0. 0 YELLOW 2 . 0 2 . 0 2 . 0 0. 0 YELLOW 2 .0 2. 0 0. 0 0. 0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP.. LOS EB L 0.279 0.278 19.4 C 14. 1 B TR 0. 108 0.433 9.8 B WB L 0. 136 0. 144 25. 6 D 16. 6 C TR 0.269 0. 300 15.5 C , NB LTR 0. 337 0.256 17.7 C . 17.7 C SB LTR 0.363 0.256 17.9 C 17.9 C INTERSECTION: Delay = 16.6 (sec/veh) V/C = 0.458 . LOS = C I 1 ' l 1 I I 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION DUVALL AVE NE/NE SUNSET BL AREA TYPE OTHER I ANALYST BLS DATE , 7/27/90 TIME PM COMMENT 1993-NO BUILD-FCPMNB5 VOLUMES GEOMETRY ,EB WB NB SB : EB WB NB SB LT 387 53 78 67 : L 12.0 L 12. 0 LT 12 . 0 LT 12.0 TH 604 294 257 424 : T 12.0 T 12. 0 TR 12 . 0 TR 1210 RT 96 54 51 263 : TR 12.0 TR 12.0 12 . 0 1210 RR 24 14 13 66 : 12 .0 12. 0 12 . 0 1210 . 12 .0 12. 0 12 . 0 1210 . 12 . 0 12. 0 12 . 0 1210 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES . PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb _ Y/N min T EB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 NB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SB 0. 00 2. 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90. 0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD ' X PD X i GREEN , 4 . 0 34 . 0 14. 0 0.0 GREEN 7.0 21.0 0.0 0.0 YELLOW 2 . 0 2 . 0 2 .0 0. 0 YELLOW 2 . 0 2. 0 0. 0 010 ` LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.586 0.433 15. 6 C 10. 6 B , TR 0.415 0.544 7.9 B WB L 1. 044 0. 033 144. 1 F 43 .5 E TR 0.773 0. 144 28.2 D NB LTR 0.567 0.222 20.8 C 20.8 C SB LTR 1. 070 0.222 62.8 F 62 .8 F i1 INTERSECTION: Delay = 31. 6 (sec/veh) V/C = 0.696 LOS = D _ l SUPPORT DOCUMENTATION TWO 1993 NO-BUILD 1992 ORCHARDS AND FORREST CRESTE COMPLETION SIGNALIZED INTERSECTION ANALYSIS 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4TH STREET/DUVALL AVE NE AREA TYPE OTHER ANALYST BLS DATE 01-27-1992 TIME AM COMMENT 1993-PROPOSED ACTION--FCAMAP1 VOLUMES : GEOMETRY EB WB NB SB : EB WB NB SB LT 125 8 36 150 : L 12.0 L 12.0 LTR 12. 0 L 12. 0 TH 348 787 32 6 : T 12.0 T 12.0 12.0 TR 12 .0 RT 13 288 6 227 : TR 12.0 TR 12. 0 12.0 12 .0 RR 3 71 1 23 : 12.0 12.0 12.0 12 .0 . 12.0 12. 0 12.0 12.0 : 12.0 12. 0 12.0 12.0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0.00 2. 00 N 0 2 0.90 5 Y 16.8 3 y ,r WB 0. 00 2. 00 N 0 2 0.90 5 Y 16.8 3 NB 0.00 2.00 N 0 2 0.90 5 Y 25.8 3 SB 0. 00 2.00 N 0 2 0.90 5 Y 25.8 3 SIGNAL SETTINGS CYCLE LENGTH = 90. 0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X X RT X PD X PD X WB LT X. SB LT X TH X TH X RT X RT X PD X PD X GREEN 7.0 16. 0 38.0 0. 0 GREEN 21.0 0. 0 0. 0 0.0 YELLOW 2.0 2. 0 2 .0 0. 0 YELLOW 2. 0 0.0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.308 0.267 20.2 C 8.8 B TR 0.194 0. 611 5.0 A WB L 0.079 0.067 30.0 D 18.0 C TR 0.830 0.411 17.9 C NB LTR 0.370 0.222 19.6 C 19. 6 C SB L 0.490 0.222 24. 1 C 24. 3 C TR 0.696 0.222 24.4 C INTERSECTION: Delay = 16.9 (sec/veh) V/C = 0. 642 LOS = C 1985HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT 4 ************************************************************************** INTERSECTION NE 4th Street/Duvall Ave NE AREA TYPE OTHER ANALYST BLS DATE 01-27-1992 TIME PM COMMENT 1993-PROPOSED ACTION--FCPMAPI VOLUMES : GEOMETRY EB WB NB SB : EB WB NB SB LT 270 9 20 462 : L 12.0 L 12.0 LTR 12. 0 L 12.0 J , TH 1259 556 11 52 : T 12.0 T 12.0 12 . 0 TR 12.0 RT 73 240 12 206 : TR 12. 0 TR 12.0 12. 0 12 .0 RR 15 60 0 51 : 12.0 12.0 12.0 12. 0 12. 0 12.0 12 . 0 12.0 12. 0 12. 0 12. 0 12. 0 ADJUSTMENT FACTORS ` GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE 1 (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2 . 00 Y 0 2 0.90 5 Y 11.5 3 WB 0. 00 2.00 Y 0 2 0.90 5 Y 11.5 3 NB 0. 00 2. 00 Y 0 2 0.90 5 Y 20.5 3 SB 0.00 2 . 00 Y 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X X _ RT X PD X PD X WB LT X SB LT X ? TH X TH X RT X RT X PD X PD X GREEN 5. 0 26. 0 24.0 0.0 GREEN 27. 0 0. 0 0. 0 0. 0 YELLOW 2.0 2.0 2.0 0. 0 YELLOW 2 . 0 0. 0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.498 0.356 17.8 C 12.7 B ` TR 0.809 0.567 11.7 B Ui WB L 0. 133 0.044 31.5 D 50.0 E TR 1. 034 0.256 50.2 E NB LTR 0. 170 0.289 15.5 C 15.5 C SB L 1.136 0.289 110.5 F 82.1 F TR 0.564 0.289 18.7 C INTERSECTION: Delay = 36.8 (sec/veh) V/C = 0.881 LOS = D 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4th Street/Union Ave NE AREA TYPE OTHER ANALYST BLS DATE 01-27-1992 TIME AM COMMENT 1993-PROPOSED ACTION-FCAMPA2 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 67 44 191 47 : L 12.0 L 12 . 0 LT 12.0 LT 12.0 TH 322 1413 62 16 : T 12. 0 T 12.0 • TR 12. 0 TR 12 . 0 RT 34 59 85 145 : TR 12.0 TR 12. 0 12 . 0 12. 0 RR 9 15 21 44 : 12.0 12 .0 12 .0 12. 0 : 12. 0 12.0 12. 0 12 . 0 • . 12.0 12.0 12. 0 12. 0 it ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2.00 N 0 2 0.90 5 Y 19.8 3 WB 0.00 2 . 00 N 0 2 0.90 5 Y 19.8 3 NB 0. 00 2 .00 N 0 2 0.90 5 Y 25.8 3 SB 0.00 2. 00 N 0 2 0.90 5 Y 25.8 3 SIGNAL SETTINGS CYCLE LENGTH = 124.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X 1_ TH X X TH X RT X X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 8. 0 6. 0 60.0 0.0 GREEN 18. 0 22 . 0 0. 0 0. 0 YELLOW 2 . 0 2 . 0 2. 0 0. 0 YELLOW 2. 0 2. 0 0. 0 0. 0 LEVEL OF SERVICE LANE GRP. V/C G/.0 DELAY LOS APP. DELAY APP. LOS EB L 0.364 0. 121 38. 6 D 14. 1 B TR 0.213 0.540 9. 6 B WB L 0.512 0. 056 46.9 E 37.9 D TR 1. 011 0.476 37.7 D NB L 0.740 0. 169 43 .8 E 38 .8 D TR 0.508 0. 169 31.3 D SB LTR 0.440 0. 137 32.1 D 32 . 1 D INTERSECTION: Delay = 33. 5 (sec/veh) V/C = 0.787 LOS = D 1__ 19851HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4th Street/Union Ave NE AREA, TYPE OTHER ANALYST BLS DATE 01-27-1992 TIME PM COMMENT 1993-Proposed Action--FCPMAP2 VOLUMES : GEOMETRY EB WB NB SB : EB WB NB SB LT 1341 110 94 173 : L 12.0 L 12.0 LT 12. 0 LT 12. 0 TH 1275 645 93 123 : T 12.0 T 12.0 TR 12. 0 TR 12.0 RT 227 118 93 184 : TR 12.0 TR 12.0 12.0 12.0 RR 57 30 23 46 : 12.0 12.0 12. 0 12. 0 . 12.0 12 . 0 12. 0 12 .0 . 12.0 12 .0 12. 0 12 .0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb . Y/N min T EB 0. 00 2 .00 N 0 2 0.90 5 Y 14.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 NB ! 0.00 2.00 N 0 2 0.90 5 Y 20.5 3 SB 0.00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 102 .0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 12 . 0 16.0 28.0 0.0 GREEN 18. 0 18. 0 0. 0 0. 0 YELLOW 2. 0 2. 0 2 . 0 0. 0 YELLOW 2.0 2 . 0 0.0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.787 0.284 31.4 D 56.7 E TR 1.096 0.441 62.3 F WB L 0.669 0. 108 39.4 D 33.7 D TR 0.927 0.265 32.9 D NB LTR 0.537 0. 167 25.8 D 25.8 D SB LTR 0.918 0. 167 39.4 D 39.4 D N INTERSECTION: Delay = 46.2 (sec/veh) V/C = 0.945 LOS = E 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4th Street/Monroe Ave NE AREA TYPE OTHER ANALYST BLS DATE 01-28-1992 TIME AM COMMENT 1993-Proposed Action--FCAMPA3 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 41 31 102 31 : L 12.0 L 12.0 LT 12.0 LT 12. 0 TH 431 1939 32 31 : T 12.0 T 12.0 TR 12.0 TR 12. 0 RT 35 78 49 11 : TR 12.0 TR 12 .0 12.0 12 . 0 RR 9 20 12 8 : 12.0 12 .0 12.0 12. 0 12.0 12.0 12.0 12. 0 .• 12. 0 12.0 12 . 0 12 . 0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0.00 2. 00 N 0 2 0.90 5 Y 14.5 3 WB 0.00 2.00 N 0 2 0.90 5 Y 14.5 3 NB 0.00 2. 00 N 0 2 0.90 5 Y 20.5 3 SB 0.00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X NB LT X TH X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 4. 0 62. 0 0.0 0. 0 GREEN 18. 0 0.0 0. 0 0. 0 YELLOW 2.0 2 . 0 0.0 0. 0 YELLOW 2 . 0 0. 0 0. 0 0. 0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.807 0. 033 69. 3 F 8.7 B TR 0.224 0. 678 3 . 6 A WB L 0. 610 0. 033 44.2 E 17.3 C TR 0.973 0. 678 16.9 C NB L 0. 365 0. 189 24.5 C 22.7 C TR 0.251 0.189 20.2 C SB L 0.123 0.189 23.0 C 21.2 C TR 0. 114 0. 189 19. 6 C INTERSECTION: Delay = 16.2 (sec/veh) V/C = 0.839 LOS = C 1 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4th Street/Monroe Ave NE AREA, TYPE OTHER ANALYST BLS i DATE: 01-28-1992 TIME PM COMMENT 1993-Proposed Action--FCPMAP3 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 216 65 75 163 : L 12.0 L 12.0 LT 12.0 LT 12.0 !, TH 1541 129 51 62 : T 12.0 T 12.0 TR 12.0 TR 12.0 RT 124 71 61 104 : TR 12.0 TR 12.0 12. 0 12 . 0 RR 31 18 12 26 : 12.0 12.0 12.0 12.0 . 12 .0 12.0 12. 0 12. 0 . 12.0 12.0 12. 0 12. 0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0.00 2. 00 N 0 2 0.90 5 Y. 14.5 3 WB 0.00 2. 00 N 0 2 0.90 5 Y 14.5 3 NB , 0. 00 2. 00 N 0 2 0.90 5 Y 20.5 3 SB 0. 00 2.00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 10.0 6. 0 48. 0 0. 0 GREEN 18. 0 0. 0 0. 0 0. 0 YELLOW 2 . 0 2 .0 2.0 0.0 YELLOW 2.0 0.0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.751 0. 189 32.7 D 14.9 B TR 0.887 0. 611 12.6 B 4 ° WB ; L 0.427 0. 100 30.0 D 12 .9 B ' TR 0. 120 0.522 7.1 B NB L 0. 383 0. 189 24.8 C 22.5 C TR 0.361 0.189 20.8 C SB L 0.719 0. 189 32.5 D 27.7 D TR 0.509 0.189 22.2 C INTERSECTION: Delay = 16. 6 (sec/veh) V/C = 0.800 LOS = C 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE 4th ST/ NE 3rd St/Jefferson Ave NE AREA TYPE OTHER ANALYST BLS DATE 01-28-1992 TIME AM COMMENT 1993-Proposed Action--FCAMAP4 VOLUMES : GEOMETRY EB WB NB SB : EB WB NB SB LT 14 18 13 14 : L 12. 0 L 12.0 LTR 12 . 0 LT 12.0 TH 540 1187 1 5 : T 12.0 T 12.0 12.0 R 12 . 0 RT 35 96 13 56 : TR 12.0 TR 12.0 12 . 0 12 . 0 RR 4 24 3 14 : 12.0 12. 0 12.0 12. 0 12. 0 12. 0 12.0 12 .0 12 . 0 12.0 12.0 12 .0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0.00 2.00 N 0 2 0.90 5 Y 11.5 3 WB 0. 00 2 . 00 N 0 2 0.90 5 Y 11.5 3 NB 0. 00 2.00 N 0 2 0.90 5 Y 20.5 3 SB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X NB LT X TH X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X _ RT X RT X PD X PD X GREEN 68.0 0. 0 0. 0 0. 0 GREEN 18. 0 0. 0 0. 0 0.0 YELLOW 2 . 0 0.0 0. 0 0. 0 YELLOW 2 . 0 0. 0 0. 0 0. 0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0. 194 0.744 2.8 A 2 .4 A TR 0.254 0.744 2.4 A WB L 0. 033 0.744 2. 3 A 3 .4 A TR 0.561 0.744 3 .4 A NB LTR 0. 102 0.189 19.5 C 19.5 C SB LT 0. 063 0. 189 19.4 C 19.6 C R 0. 163 0. 189 19.8 C INTERSECTION: Delay = 3 .8 (sec/veh) V/C = 0.480 LOS = A P i _ 1985 !HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT **** ********************************************************************* INTERSECTION NE 4th St/NE 3rd St/Jefferson Ave NE AREAITYPE OTHER ANALYST BLS DATE 01-28-1992 TIME PM COMMENT 1993-Proposed Action--FCPMAP4 VOLUMES GEOMETRY EB WB NB SB. : EB WB NB SB LT 90 21 56 23 : L 12.0 L 12.0 LTR 12. 0 LT 12.0 TH 1806 870 8 1 : T 12.0 T 12.0 12. 0 R 12. 0 RT ; 20 23 28 153 : TR 12.0 TR 12.0 12. 0 12.0 RR 4 6 3 14 : 12.0 12.0 12 . 0 12.0 12.0 12.0 12.0 12.0 : 12. 0 12. 0 12 . 0 12 .0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE , I (%) (%) Y/N Nm Nb Y/N min T EB 0.00 2. 00 N 0 2 0.90 5 Y 11.5 3 WB 0. 00 2. 00 N 0 2 0.90 5 Y 11.5 3 NB 0. 00 2.00 N 0 2 0.90 5 Y 20.5 3 SB 0.00 2. 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90. 0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X NB LT X TH X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 68. 0 0. 0 0. 0 0. 0 GREEN 18.0 0. 0 0. 0 0. 0 YELLOW 2 . 0 0. 0 0.0 0.0 YELLOW 2. 0 0. 0 0. 0 0.0 1 1 LEVEL OF SERVICE 1 LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.290 0.744 3 .0 A 5.8 B TR 0.805 0.744 5.9 B WB i L 0.292 0.744 3.5 A 2.7 A TR 0.393 0.744 2.7 A NB LTR 0.537 0. 189 23 .3 C 23 .3 C SB LT 0. 091 0. 189 19.5 C 22.3 C R 0.544 0. 189 22.7 C INTERSECTION: Delay = 6.2 (sec/veh) V/C = 0.752 LOS = B 1985 HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** INTERSECTION NE Sunset BL/Duvall Ave NE AREA TYPE. OTHER ANALYST BLS DATE 01-28-1992 TIME AM COMMENT 1993-Proposed Action--FCAMAP5 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 118 34 80 34 : L 12.0 L 12 .0 LT 12 . 0 LT 12. 0 TH 125 224 350 153 : T 12.0 T 12.0 TR 12.0 TR 12 .0 RT 30 25 30 144 : TR 12.0 TR 12.0 12 . 0 12 . 0 RR 7 6 7 36 : 12.0 12.0 12 . 0 12. 0 : 12. 0 12. 0 12 . 0 12 .0 . 12. 0 12 .0 12 . 0 12 . 0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2. 00 N 0 2 0.90 5 Y 14.5 3 WB 0.00 2 .00 N 0 2 0.90 5 Y 14.5 3 NB 0. 00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SB 0.00 2 . 00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 90.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT - X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X GREEN 14. 0 10. 0 28 . 0 0.0 GREEN 4 . 0 24 .0 0. 0 0.0 YELLOW 2 . 0 2 . 0 2 . 0 0. 0 YELLOW 2 .0 2 . 0 0. 0 0.0 LEVEL OF SERVICE LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB L 0.279 0.278 19.4 C 14. 0 B TR 0.115 0.433 9.8 B WB L 0. 154 0. 144 25.6 D 16.7 C TR 0. 269 0.300 15.5 C NB LTR 0.592 0.256 19.6 C 19.6 C SB LTR 0.404 0.256 18. 1 C 18. 1 C INTERSECTION: Delay = 17.5 (sec/veh) V/C = 0.514 LOS = C 1985 ':HCM: SIGNALIZED INTERSECTIONS SUMMARY REPORT ************************************************************************** ; '! INTERSECTION NE Sunset BL/Duvall Ave NE AREA TYPE OTHER ANALYST BLS i DATE 01-28-1992 TIME PM COMMENT 1993-Proposed Action--FCPMAP5 VOLUMES GEOMETRY EB WB NB SB : EB WB NB SB LT 387 70 96 67 : L 12.0 L 12.0 LT 12.0 L 12 .0 TH 604 294 319 553 : T 12.0 T 12.0 TR 12.0 T 12.0 RT 132 54 59 263 : TR 12.0 TR 12.0 12. 0 TR 12. 0 RR 1 33 14 15 66 : 12.0 12.0 12. 0 12. 0 . 12. 0 12. 0 12 . 0 12.0 , : 12.0 12.0 12 .0 12.0 ADJUSTMENT FACTORS GRADE HV ADJ PKG BUSES PHF PEDS PED. BUT. ARR. TYPE (%) (%) Y/N Nm Nb Y/N min T EB 0. 00 2. 00 N 0 2 0.90 5 Y 14.5 3 WB n 0. 00 2 . 00 N 0 2 0.90 5 Y 14.5 3 NB j 0. 00 2. 00 N 0 2 0.90 5 Y 20.5 3 SB 0. 00 2.00 N 0 2 0.90 5 Y 20.5 3 SIGNAL SETTINGS CYCLE LENGTH = 101.0 PH-1 PH-2 PH-3 PH-4 PH-1 PH-2 PH-3 PH-4 EB LT X X NB LT X TH X X TH X RT X RT X PD X PD X WB LT X SB LT X TH X TH X RT X RT X PD X PD X j GREEN 8. 0 34.0 14. 0 0. 0 GREEN 8. 0 27. 0 0. 0 0.0 YELLOW 2. 0 2. 0 2. 0 0.0 YELLOW 2 . 0 2. 0 0. 0 0.0 LEVEL OF SERVICE f LANE GRP. V/C G/C DELAY LOS APP. DELAY APP. LOS EB ' L 0.597 0.426 18. 0 C 13.7 B TR 0.486 0.485 11.5 B WB L 0. 663 0.069 43 . 6 E 38. 6 D TR 0.868 0.129 37. 6 D NB LTR 0. 600 0.257 22 .0 C 22 . 0 C SB L 0.634 0.069 42 .0 E 43 .5 E TR 0.998 0.257 43.7 E INTERSECTION: Delay = 27. 6 (sec/veh) V/C = 0.778 LOS = D ,' SUPPORT DOCUMENTATION THREE SAMPLE MITIGATION FOR AFFECTED INTERSECTIONS NOTE: These computer runs demonstrate a typical configuration for a resulting LOS of "D". 1985 HCM: UNSIGNALIZED INTERSECTIONS Page-1 ********************************************************************* IDENTIFYING INFORMATION AVERAGE RUNNING SPEED, MAJOR STREET 45 PEAK HOUR FACTOR 9 AREA POPULATION 150000 NAME OF THE EAST/WEST STREET Forrest Crest Access NAME OF THE NORTH/SOUTH STREET NE Duvall NAME OF THE ANALYST BLS DATE OF THE ANALYSIS (mm/dd/yy) 4/9/92 TIME PERIOD ANALYZED AM INTERSECTION TYPE AND CONTROL INTERSECTION TYPE: T-INTERSECTION MAJOR STREET DIRECTION: NORTH/SOUTH CONTROL TYPE WESTBOUND: STOP SIGN TRAFFIC VOLUMES EB WB NB SB LEFT -- 15 0 13 THRU -- 0 450 327 RIGHT -- 60 6 0 NUMBER OF LANES EB WB NB SB LANES -- 1 2 2 a _ ADJUSTMENT FACTORS Page-2 ! PERCENT RIGHT TURN CURB RADIUS (ft) ACCELERATION LANE GRADE ANGLE FOR RIGHT TURNS FOR RIGHT TURNS EASTBOUND --- --- - WESTBOUND 0.00 90 20 N I NORTHBOUND 0.00 90 20 N SOUTHBOUND 0.00 90 20 N VEHICLE COMPOSITION % SU TRUCKS % COMBINATION AND RV'S VEHICLES % MOTORCYCLES EASTBOUND --- --- --- WESTBOUND 0 0 0 NORTHBOUND 0 0 0 SOUTHBOUND 0 0 0 CRITICAL GAPS TABULAR VALUES ADJUSTED SIGHT DIST. FINAL (Table 10-2) VALUE ADJUSTMENT CRITICAL GAP MINOR RIGHTS_ WB 6. 10 6. 10 0.00 6.10 MAJOR LEFTS SB 5.80 5.80 0. 00 5.80 MINOR LEFTS WB 7.90 7.90 0.00 7.90 CAPACITY AND LEVEL-OF-SERVICE Page-3 POT EN- ACTUAL FLOW- TIAL MOVEMENT SHARED RESERVE RATE CAPACITY CAPACITY CAPACITY CAPACITY MOVEMENT v(pcph) c (pcph) c (pcph) c (pcph) c = c - v LOS p M SH R SH MINOR STREET WB LEFT 18 177 174 > 174 > 155 > D > 451 > 359 >B RIGHT 73 750 750 > 750 > 676 > A MAJOR STREET SB LEFT 16 545 545 545 529 A i 1985 HCM: UNSIGNALIZED INTERSECTIONS . Page-1 ********************************************************************* IDENTIFYING INFORMATION AVERAGE RUNNING SPEED, MAJOR STREET 30 PEAK HOUR FACTOR 1 AREA POPULATION 150000 i INANE OF THE EAST/WEST STREET Forrest Crest Access • NAME OF THE NORTH/SOUTH STREET Duvall Ave NE , NAME OF THE ANALYST BLS DATE OF THE ANALYSIS (mm/dd/yy) 4/9/92 TIME PERIOD ANALYZED PM INTERSECTION TYPE AND CONTROL INTERSECTION TYPE: T-INTERSECTION MAJOR STREET DIRECTION: NORTH/SOUTH ' CONTROL TYPE WESTBOUND: STOP SIGN TRAFFIC VOLUMES , EB WB NB SB LEFT -- 13 0 65 THRU -- 0 309 445 RIGHT -- 31 28 0 , NUMBER OF LANES - EB WB NB SB i LANES -- 1 2 2 , ADJUSTMENT FACTORS Page-2 PERCENT RIGHT TURN CURB RADIUS (ft) ACCELERATION LANE GRADE ANGLE FOR RIGHT TURNS FOR RIGHT TURNS EASTBOUND --- --- - WESTBOUND 0.00 90 20 N NORTHBOUND 0.00 90 20 N SOUTHBOUND 0.00 90 20 N VEHICLE COMPOSITION % SU TRUCKS % COMBINATION AND RV'S VEHICLES % MOTORCYCLES EASTBOUND --- --- --- WESTBOUND 0 0 0 NORTHBOUND 0 0 0 SOUTHBOUND 0 0 0 CRITICAL GAPS TABULAR VALUES ADJUSTED SIGHT DIST. FINAL (Table 10-2) VALUE ADJUSTMENT CRITICAL GAP MINOR RIGHTS WB 5.50 5.50 0.00 5.50 MAJOR LEFTS SB 5.50 5.50 0.00 5.50 MINOR LEFTS WB 7.00 7.00 0.00 7.00 ; CAPACITY AND LEVEL-OF-SERVICE Page-3 POT EN- ACTUAL FLOW- TIAL MOVEMENT SHARED RESERVE RATE CAPACITY CAPACITY CAPACITY CAPACITY MOVEMENT v(pcph) c (pcph) c (pcph) c (pcph) c = c - v 1LOS p M SH R SH MINOR STREET WB LEFT 14 253 238 > 238 > 224 > C > 499 > 451 >A I RIGHT 34 923 923 > 923 > 889 > A MAJOR STREET SB LEFT 72 757 757 757 685 A • 1 _I J i � I � I • 1 -, j\ is :4 r• _ ^t 1 h4:.;.0 l;;✓'€..,_,.: ,. ,.. TECHNICAL INFORMATION REPORT 1 FORREST CRESTE RENTON WASHINGTON PROJECT 90-74 PREPARED FOR: MR. RAY LABLANC 11621 SE 47TH PLACE BELLEVUE WA 98006 ( 206) 746-2556 ,f •i ' PREPARED BY: PACIFIC ENGINEERING DESIGN INC. 130 ANDOVER PARK EAST SUITE 300 SEATTLE WA 98188 (206) 432-7970 x .s 41,_I/iI MICROFILMED .;.�.� . , - ,.'.d A 4,!.,:-,( tr 1 ,k' :,)..,, l's •S ic6iz c»: ' • SIGNAL G o ' EXPIRES 5/6/ 1993 OCTOBER 5 , 1992 • TABLE OF CONTENTS PAGE I . PROJECT OVERVIEW II . PRELIMINARY CONDITIONS SUMMARY III . OFF SITE ANALYSIS IV. RETENTION/DETENTION ANALYSIS • V. CONVEYANCE SYSTEMS ANALYSIS VI . SPECIAL REPORTS AND STUDIES VII . BASIN AND COMMUNITY PLANNING AREAS VIII . OTHER PERMITS IX. EROSION/SEDIMENTATION CONTROL DESIGN X. BOND QUANTITY WORK SHEET, RETENTION/DETEN.TION • FACILITY SUMMARY SHEET AND SKETCH, AND DECLARATION OF COVENANT . . . . . . . . . . . . . XI . MAINTENANCE AND OPERATIONS MANUAL li • : � • 1 Pago 1 of 2 King County Building and Land Development Division �._ TECHNICAL INFORMATION REPORT (TIR) WORKSHEET °(sifP.,;.AR11it1.;r` PROJECT OWNER E'AND, a i�'s%!-r' ';%• :sr,.,,'}�,r ,lr r LOCATION ii tI;6. :ANDC CRRIPYION1 't;,i'",`r' Project Owner 2Ay. l•.A61.X11( ' Project Name f=or22rST .GV.:STr Address 1 I(gZI Sf_ 4-7T1r1 . OA,_ '. Location Phone fr::LUE\M,r., LJA, c1Sr00(, 746-2;SL Township 23 Project Engineer (311.A., O( ni ' Range Company (AC . rm✓�th r�.2�n (?CS)(,11 Inc Section S'N I G Address Phone RO knOptrf'� Plc • '&3 GG Project Size l Z AC. Sr 4 . O Upstream Drainage Basin Size 2 4- AC ,PAHY;TYPA;Or.PERMIT 14PPLICATION; :, :. :•.PART.4•O7HER(PERMITS;:;;, . „ ,; . '. . 0 Subdivision (-1 DOF/G HPA n Shoreline Management n Short Subdivision 0 COE 404 0 Rockery 0 Grading Ti DOE Dam Safety FXl Structural Vaults 17'1 Commercial I FEMA Floodplain n Other Other COE Wetlands 0 HPA • PARTS SITE COMMUNITY AND:DRAINAGE • ;r , Community 212;r TOri Drainage Basin M A-01- wovrj /C GOA-2 ;:PARY•6.,SITE CHARACTERISTICS } : . . ,2............. '.. .,. .,.. . .._ (] River Floodplain 0 Stream [ 1, Wetlands Critical Stream Reach Seeps/Springs Depressions/Swales n High Groundwater Table 0 Lake n Groundwater Recharge n Steep Slopes n Other Lakeside/Erosion Hazard Soil Type Slopes Erosion Potential Erosive Velocities A)-C. 10 - )1 0r, r+0, 21vTr - Sr_-vr>2r- 2-3 PPS v 13 .4S none: QI Additional Sheets Attatched 1/90 • I Pago 2 of 2 ' King County Building and Land Development Division TECHNICAL INFORMATION REPORT (TiR) WORKSHEET PART , ,DEV;ELOPMENT,LIMITATIONS • REFERENCE LIMITATION/SITE CONSTRAINT Ch.4-Downstream Analysis E O E O E Additional.Sheets Attatched PART 9 ESC;'REQUIREMENTS . • MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION FOLLOWING CONSTRUCTION • t2 Sedimentation Facilities ® Stabilize.Exposed Surface [2] Stabilized Construction Entrance [Z Remove and Restore Temporary ESC Facilities I XI Perimeter Runoff Control I'yl Clean and Remove All Silt and Debris • lyl Clearing and Grading Restrictions I Ensure Operation of Permanent Facilities lk I Cover Practices n Flag Limits of NGPES l XI Construction Sequence E Other E Other II „PART 10'SURFACE WATER SYSTEM; . Grass Lined Channel O Tank O Infiltration Method of Analysis l xI Pipe System CZ Vault Ne Depression S{S(LH lxl Open Channel l'T Energy Dissapator (X Flow Dispersal Compensation/Mitigation O Dry Pond O Wetland O Waiver of Eliminated Site Storage O Wet Pond E Stream O Regional Detention Brief Description of System Operation 0(31kmn SiGnM R tin of f In NAIA•t.iS- 2c'.4 rim f Z i tT&Z S P1L)02.Tb OIS C h A-2t,) Facility Related Site Limitations Reference Facility Limitation El Additional Sheets Attatched lI I PART 11 STRUCTURAL ANALYSIS .;PART 2.. EASEMENTS/TRACTS (May require special structural review) .; G ....? I,.•. + d•. ,r ,.t , . .,. ,.....A:• > ..+ i.l.'4 e Ikl Drainage Easement n Cast in Place Vault O Other n Access Easement 71 Retaining Wall IRI Native Growth Protection Easement ® Rockery>4'High I—I Tract O Structural on Steep Slope El Other • PART 14 SIGNATURE OF;PROFESSIONAL ENGINEER . : ,••. '. ; I or a civil onginoor under my suporvislon have visited the site. Actual site conditions as observed worn Incorporated into this workshoot and tho 13..S..12 n nattatchments. To tho bost of my knowledge tho information provided .t.L�t OCT.Sr, 1°14i? hero is accurate. sry,»ay.f. 1/90 • • • • • I . PROJECT OVERVIEW THIS SITE IS LOCATED AT THE EASTERLY EDGE OF THE CITY OF RENTON . THE WESTERLY PROPERTY LINE ABUTS DUVALL AVE. NE (SE 138TH AVE) . THE • SOUTHERLY PROPERTY LINE ABUTS THE TO BE CONSTRUCTED 6TH STREET . THE TOTAL SITE AREA IS APPROXIMATELY 12 ACRES WITH APPROXIMATELY 11 ACRES BEING DEVELOPED . THE REMAINING 1 ACRE IS A TYPE 2 WETLAND ' AND BUFFER LOCATED ADJACENT TO• THE SOUTHWEST PROPERTY CORNER . THE SLOPE RANGES FROM 8 TO 11 PERCENT SLOPING DOWNWARD TOWARD THE WEST AND SOUTH . THERE IS ONE SMALL STALL AND SHED LOCATED NEAR THE • NORTHEAST PROPERTY CORNER. MOST OF THE SITE IS CURRENTLY OVERGROWN . WITH TREES AND UNDERBRUSH . THERE IS A SMALL AREA AROUND THE STALL AND SHED THAT IS OVERGROWN WITH GRASSES . THE SITE IS TO BE DEVELOPED INTO A 192 UNIT APARTMENT/CONDO PROJECT WITH TWENTY BUILDINGS LOCATED THROUGHOUT THE -SITE . • i, THE SITE DRAINS IN SHEET FASHION TOWARDS THE WEST AND SOUTHWEST . f RUNOFF ENTERS THE WETLAND LOCATED ADJACENT TO THE SOUTHWEST PROPERTY CORNER. THERE ARE TWO EXISTING AREAS THAT DISCHARGE RUNOFF ONTO THE SITE: 1) 138TH PLC SE AND 2 ) 140TH AVE SE. THESE UPSTREAM FLOWS WILL BYPASS ON-SITE .DETENTION AND BE ROUTED, DIRECTLY • TO THE EXISTING WETLAND. • • • 1.1 't , • flit i ,fir i I , lj � ,. ,Si^ K - @ SE IOaTH I. 1 ' t l lei ��0. u .s>9 sc "'TT" u' C 3{ 111 pO"�. sT I ' l�Y Cr �Ja .,e 3T nTM sr g ,+. °J �M' sr f���F7rp . ° s sS sosiX sr • ,M X •:,E..12i31 3 y 2, i�S ,I • OM sr' plc Y, � dleLx'lr gyp 1 < i 1 'VV.- �I ,rw � Si7..J k I ' K I"M if II JIWOS t 1-"—'�-- I �L 1',1 ,f 74^3 •��. J ~ S♦ .. S K J,n,�Y�, � I 671`, I o ,oolp `<j sal K .. �•T_. ,, ` d$•; Y•t'' Y ',N�'�5d01,,.r.., ` r /' •w :I •Z N ,d, ,1. 5 ,'.j.: �'7yF • iil'3n 1 •;0 1 f •". 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PRELIMINARY CONDITIONS SUMMARY • • • IP is . • �' ti yA • i CITY OF RENTON • =..0 i�r�'0. Planning/Building/Public Works Department { Earl Clymer,, Mayor Lynn Cuttniunn,Administeutor • • September 21, 1992 • Mr. Ray LaBlanc 11621 SE 47th PI Bellevue, WA98006 I SUBJECT: Forrest Creste • • - . ECF;'SA-093-88 Dear Mr. LaBlanc: • • • Attached herein is a copy of the mitigation measures that were adopted by the Environmental Review • Committee at its regular meeting on•September 16, 1992. These measures will apply to all proposed • development actions identified in the Draft and Final EIS. The measures will apply to the first- permit, • ostensibly a Special Permit for Fill and.Grade, and will continue tO be applied with all subsequent permits. This mitigation document is an appealable action. Appeals should be filed with the City of Renton Hearing Examiner by October 12, 1992, 5:00 p.m. If you have any questions about these mitigation measures or the appeal process, please contact Donald • Erickson, Principal Planner and.Secretary to the Environmental Review Committee or Lenora Blauman, Project Manager, at 235-2550. Sincerely, • • J • Donald K. Erickson,A1CP ' Secretary to the ERC ` III 3 cc: Washington State Department of Ecology Environmental Review Section • Mail Stop PV-11 Olympia, WA 98504 • . • ISSUITR • 200 Mill Avenue South • Renton, Washington 98055 : I .• • 1• • . , ......„.• • ...• . . • . 1 ' „ .• . . , • . . . - • . • . . . •... , • FoRREsT cREsTE . 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II'• 1 •:7.;:.•,:,1:::-.-7-.• • •-7A-....---', • • •• *. • sk•:.'.%a::.1: A i ,..;.- ' - -• • :' • --:.,,,..,23-.,,..v...,‘„,..„..4...._„A. . ..,„...:.- .. .. ,..--._-------,-., • • f . ; .• i . , .. . • . 1 • •j I. • , , . ; t..,.. 1 • ; ' • i I i • , I . . . • ; MITIGATION DOCUMENT , ocyt i, A + C21 + ISSUED SEPTEMBER 22, 1992 • 1 A"— 7- N,1:0 BY THE CITY OF RENTON . :. . . 1• ., , I . . . , . . . 1 • , . . ii i • MITIGATION DOCUMENT FORREST CRESTE MULTI-FAMILY RESIDENTIAL DEVELOPMENT The Environmental Review Committee for the City of Renton issued a Final Environmental Impact Statement for the Forrest Creste Development on September 16, 1992. The EIS for this project has identified a number of possible mitigation measures for adverse environmental impacts that were considered to be significant or potentially significant (as defined by quantitative measures whenever such measures were found to exist). In some cases, such measures do not exist and it was left up to the responsible official to determine whether additional mitigation measures, if any, are warranted to protect the environment. A number of chapters of WAC 197-11 speak directly to the imposition of mitigation measures. The relevant chapters are cited below. WAC 197-11-060 Content of Environmental Review states that agencies shall "carefully consider the range of probable impacts, including short-term and long-term effects." Impacts shall include "those that are likely to arise or exist over the lifetime of a proposal", or, in some cases, even longer. WAC 197-11-330 Threshold Determination Process requires the responsible official to take into account the following when determining whether a proposal has significant adverse impacts: "The same proposal may have a significant adverse impact in one location but not in another location;" The absolute quantitative effects of a proposal are also important, and may result in a significant adverse impact regardless of the nature of the existing environment"; and, "Several marginal impacts when considered together may result in a significant adverse impact." In reaching such a decision, SEPA states that the responsible official shall not balance whether the beneficial aspects of a proposal outweigh its adverse impacts, but rather, shall consider whether a proposal has any probable significant adverse environmental impacts under the rules stated above. • WAC 197-11-448 Relationship of EIS to other considerations states that the general welfare, social, economic, and other requirements and essential considerations of state policy will be taken into account in weighing and balancing alternatives and in making final decisions. . . . The EIS provides a basis upon which the responsible agency and officials can make the balancing judgment mandated by SEPA, because it provides information on the environmental costs and impacts. • WAC 197-11-660 Substantive Authority and Mitigation requires that mitigation measures be based on policies, : I IL plans, rules or regulations formally designated by the agency. It also requires that mitigation measures shall be • related to specific adverse environmental impacts clearly identified in an environmental document on the I ', proposal: After its decisions, each agency shall make available to the public a document that states the I decisions. The document shall state the mitigation measures, if any, that will be implemented as part of the decisions, including any monitoring of environmental impacts." (WAC 197-11-660(1)(b)) This document is intended to meet this requirement. As well as analyzing the environmental impacts, the City of Renton, under its land use provisions, must assess its many c objectives and goals and decide how this project furthers or conflicts with them. Some City goals may be internally conflicting. When this occurs, the City believes that the SEPA process mandates a close environmental analysis to C; determine priorities. If the priorities are established and the project is able to mitigate its impacts sufficiently, then the City believes it should proceed. This document presents mitigation measures necessary for the ultimate construction of !f The Forrest Creste development. ;fI THE PROPOSED ACTION k Ir, Raymond LaBlanc is proposing to develop an 11.93 acro site In East Renton as a multi-family residential project !II consisting of 24 townhouse condominium units and 176 apartment units. The anticipated residential population living In Forrest Creste, with the proposed 200 units, Is 360 persons. The site is located to the north and generally west of the Intersection of Duvall Avenue NE and NE dth Street, and it Is currently covered with second growth vegetation; there are • •.64 acres of wetland (.61 acres of Class II and .03 acres of Class III) on the site. The property Is vacant except for two l outbuildings. The outbuildings and much of the vegetation will bo removed for the proposed development. To the west • FORREST CRESTE MITIGATION DOCUMENT -I. SEPTEMBER 22, 1002 i • and south of the site are the Orchards Development and the Windsor Place apartment complex: single-family developments abut the site to the north and the east of the site. Honeydew Elementary School and playground are located to the northwest of the site. The project will include a recreation center(with improvements such as lounges, active recreation areas, meeting rooms, kitchen facilities), a pool, and a sports court centrally located on the site; children's playgrounds are dispersed around the site. A trail system will be installed throughout the site, providing an area from which to observe the wetlands, as well as a system for bringing pedestrians to recreational facilities and to neighboring residential units in the Forrest Creste complex. Infrastructure improvements will include improvements to Duvall Avenue (turn lanes, sidewalks, street lighting), the • addition of internal driveways/circulation routes, and parking areas), and water, fire, and sewer systems. Additionally, the applicant will be called upon to support the construction of NE 6th Street, as/if required by City Council following discrete City evaluation of the requirements and location for this roadway. • The project requires a rezone from G-1, General Use, to R-3 (Medium-Density Multi-Family Use), a designation which is generally compatible with the current Comprehensive Plan. The applicant is also seeking site plan approval for the • proposed multi-family residential complex. .. Development on this site would be ensured to be in general compliance with the City's existing plans and programs by • • the establishment of environmental mitigation measures in this Mitigation Document and/or with conditions applied at the •• time of site plan review. Following is a discussion of environmental elements/impact areas, as identified in the Environmental Impact Statement, together with a presentation of mitigation measures designed to address potential adverse impacts: ;r A. NATURAL ENVIRONMENT • • 1. Earth • Impacts: The site is on a portion of the upland between May Creek and the Cedar River. Surface soils on the site are classified as gravely and sandy; underlying soils are composed of Vashon till (loosely sorted, highly condensed material deposited on the site about 15,000 years ago). The site slopes approximately 10%, from a height of 455 feet in the northeast corner to a low of 395 feet in the southwest corner. Seismic hazard is low on this site. 6 • ... Grading activities necessary to prepare the site for development would result in some changes to • . topography to create nearly level surfaces. These activities would result in an increased potential for • • erosion and sediments created could reach buildings and on-site wetlands. Site soils are also moisture sensitive; moisture collection could result in saturation and or erosion. • Mitigation measures established for construction activities are considered to be sufficient to limit erosion • during development. Limited impervious surfaces (approximately 40% of the site), appropriate storm . water management improvements (described in Section A.4 below), and plans for retained/introduced landscaping (described in Section A.5. below) would be sufficient to control erosion following I development of the site. , RECOMMENDED MITIGATION MEASURES: A.1.a) The applicant shall, in order to reduce the potential for adverse environmental impacts to the underlying terrain from preparation and operation of the site, shall provide a grading and filling r :` plan prepared by a geotechnlcaj engineer. This plan shall be approved by " Planning/Building/Public Works prior to the issuance of site preparation permits for any element of the proposed action and shall be consistent with the approved Site Plan. All elements of the Grading and Filling Plan aro to remain In force and effect during all site preparation and construction activities.• • FORREST CRESTS MITIGATION DOCUMENT • '2' SEPTEMOER:2, Iflil'w • • • A.1.b) The applicant shall, in order to reduce the potential for impacts to the underlying terrain from temporary construction activity, prepare a Construction Mitigation. Plan. This Plan shall include the following elements: 1) a temporary erosion control element (e.g., sediment ponds; sediment traps); 2) a temporary drainage element to address seepage; 3) a provision for wheel-washing vehicles prior to leaving the site; • 4) a provision for periodic watering of the site to minimize dust generation; - 5) a provision for a geotechnical engineer to inspect the site on a weekly basis to ensure that all approved site preparation plan elements are in full force and effect; the geotechnical engineer shall submit written reports monthly to confirm that site plan • preparation is proceeding according to plan; additional written reports shall be submitted in the event of an emergency or in the event that approved plans require modification; 6) a provision to reduce and recycle construction materials and debris, to the greatest extent feasible to limit dust/debris impacts during the construction.process; 7) a written agreement by the applicant acknowledging its obligation to pay to the City a total of up to 52,000 within 30 days of receipt of invoices from the City for street-cleaning costs in the event that the applicant does not complete required street-cleaning activities; • ••• 8) written acknowledgment by the applicant of its responsibility for repair of damage to the public right-of-way, when such damage is defined by the City as having been caused by • • construction vehicles serving the project, and with repairs to be provided by the applicant • in a manner which is consistent with City standards; • 9) an educational program for equipment operators which emphasizes procedures and techniques for limiting the impacts to the stability of site terrain and reducing dust emissions associated with the operation of construction equipment. The Construction Mitigation Plan is to be approved by the Development Services • Division in advance of issuance of a site preparation/building permit for any element of • the proposed action. All elements of the Construction Mitigation Plan are to remain in force and effect during all site preparation and construction activities. The acknowledgment for repair of damage to the public right-of-way is to be approved by the Development Services Division and the City Attorney in advance of the issuance of a permit for any element of the proposed.action. 10) Vegetation Management/Remediation Plan. This Plan shall include the following elements: • (i) A componentwtich clearly delineates tree clearing limits and protected wetland, • buffer areas to minimize disruption to vegetation. • (ii) An agreement which confirms the applicant's intent to begin building within 30 days following site preparation, and/or to hydroseed the site within thirty days of completion of grading activities (and in no instance later than.October 1st) in the event that development of the site is delayed beyond that period of time. • (iii) A surety device equivalent to ten percent (10%) of the value of the plantings to • ensure the reintroduction of native vegetation to the site (of a level and type FORREST CRESTE MITIGATION DOCUMENT a• - SEPTEMBER 22, 1092 • • • • • • •• commensurate with the current vegetation), within one year of the completion of •• • grading, in the event that construction of the development is not substantially underNay:at that time. The Vegetation Remediation Plan is to be approved by the Development Services Division in advance of issuance of a permit for any element of the proposed action. All elements of the Vegetation Remediation Plan are to remain in force and effect during all site preparation and construction activities. Note to Applicant #1: The applicant will also be required to comply with the Surface and Storm Water Drainage Ordinance, which establishes development parameters for site preparation and construction, including, but not limited to the confinement of site preparation to periods of relatively dry weather, the establishment of suitable erosion control methods, and requirements for containing exposed soil. Policy Nexus: "WAC 197-11-660; Environmental Review. Ordinance, 4-6; Mining, Excavating, and Grading Ordinance, 4-10; Comprehensive Plan I.B; Surface and Storm Water Management Ordinance 4- • 22; Land Clearing and Tree Cutting Ordinance 4-9. ADVISORY NOTE: Impacts to the terrain from operation of the proposed development and mitigation • measures to address those impacts are presented below—see "Ground Water', "Surface Water", "Storm Water Management", "Wetlands" and "Habitat"). • 2. Air Impacts: The EIS considered the impacts of and possible mitigation measures for air pollution caused by particulates, carbon monoxide, and construction activities. Particulates: For this project, particulate levels were obtained from monitoring stations in the Duwamish 111 Valley (12026 42nd Avenue South) and in Kent, at James.Street.and Second Avenue. Information was also obtained for particulate levels that were monitored at the SE. District Health Center at 12015 NE 4th Street, approximately one mile west of the project site. Samples taken between 1985 and the present indicated that the background air quality is well within the national primary.standard and the national• • secondary standard. Because the project site is in an area of lower traffic congestion than is the monitoring'site, it can be anticipated that air quality is even better at the project site than at the monitoring site. Data from PSAPCA monitoring activities indicates that emissions from wood stoves and fireplaces in the residential portions of the project would likely degrade the air quality in the area. Over the past several •! • years, there has been an increasing number of "bum bans" employed for solid fuel burning devices in ' order to protect air quality. Use of gas fireplaces, however,would be acceptable. • • . Carbon Monoxide: The increased traffic (approximately 1200 trip ends per day) generated by development of the site will increase the ambient carbon monoxide levels in the area. No monitoring has been done to confirm actual carbon monoxide levels at the project site. The site is outside a designated • carbon monoxide non-attainment area and is within an "unclassifiable area." This means that modeling ; would likely indicate that occasional violations of the standard would occur. Construction Activities: Overall, construction activities could adversely impact air quality through the generation of dust from land clearing and grading operations, as well as from the movement of construction vehicles on the site. These impacts will be only temporary In nature however, and are not , expected to have a long-term significant impact on ambient air quality. Since the site is in the City of ,I Renton's "no bum" zone, no particulate emissions will be generated by the 'burning of land clearing • debris. • FORREST CRESTE MITIGATION DOCUMENT -4- SEPTEMBER 22, 1092 ` P • • • ' I FEC.OMMENOED MITIGATION MEASURES: A.2.a) The applicant shall, in order to address air quality impacts from the operation of the residential complex, install gas fireplaces, in the event that fireplaces are to be provided. Plans for these heating units shall be approved by the Development Services Division prior to issuance of - -- building permits. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance 4-6; UFC ADVISORY NOTE: Also see Recommendations A.1 (Earth) to address air quality impacts from construction activities. See.Recommendations 8.2 to address transportation-related air quality impacts for the operation of the complex. 3. • Water a) Ground Water Impacts: The project site is located entirely with the City's Aquifer Protection Area, Zone II. Portions of the site (particularly in the western and northwestern portions of the property) host a • moderate amount of perched ground water— that is ground water which rests on or just below the surface soils,where they are underlain by Vashon till soil (see "Earth'). Ground water recharge occurs naturally on the largely permeable surfaces. Where subsurface water is perched, construction of subsurface improvements could be complex, but is feasible. Additionally, with the project, there will be some loss of recharge due to the increased amount of impervious surface (about 41% of the site would likely be converted to constructed surfaces with ,1, the proposed development). Long-term•slow surface water flow rates will be changed to rapid short-term flow rates with some accompanying loss of recharge. The contaminants entering the 1.1 ground water from the project are expected to be of the type generally found in residential areas 11 and to pose no significant threat to the aquifer.. ;. To mitigate construction-related impacts construction mitigation plans will need to be developed to minimize disruption to the site, to employ erosion control and drainage control facilities, and to revegetate the site. To mitigate the impact of the increased amount of impervious surface and of the increased flow rates,the project will need to be designed to include a maximum amount of native vegetation, and to contain a series of biofiltration swales and detention areas. These are • I • • intended to slow down the rate of water flow, to improve water quality, and to provide for infiltration, thereby partially offsetting the loss of ground water recharge. Forrest Creste would be subject to the provisions of the Aquifer Protection Area Ordinance. To reduce adverse impacts on the aquifer, the project does not propose any uses which involve the • large scale storage of regulated compounds prohibited in APA Zone II. Additionally, the project will provide sewer service for all uses on the site. ` RECOMMENDED MITIGATION MEASURES: • A.3.a) The applicant shall, in order to ensure the protection of water quality in the City's aquifer, provide each tenant with information concerning the presence of the underlying Aquifer Protection Area, with a copy of the City's public information brochures concerning the Aquifer Protection Area Ordinance, and with notice of the requirement for compliance with that Ordinance. it • A.3,b) The applicant shall provide a central vehicle wash/service area, with containment facilities, to prevent used water and contaminants from entering the surface water, • ground water or wetland areas. Policy Nexus; Aquifer Protection Area Ordinance ' FORREST CRESTE MITIGATION DOCUMENT •5• SEPTEMOER 22, 1002 , i ADVISORY NOTE: Also see Recommendations A.1 (Earth) and A.4 (Wetland:,) to addres• ground water quality impacts from construction activities. Adequate mitigation of potential ground water impacts, including the restriction on the storage or production of regulated compounds, will be also be achieved through required compliance with the City of Renton Aquifer Protection Area Ordinance. No other mitigation measures are considered necessary tc address ground water impacts. b) Surface and Storm Water Impacts: The site is located within the upland portion of the Maplewood Creek drainage basin. • Hydrology studies indicate that little runoff currently occurs at the site. However, during heavy storms, drainage from approximately ninety percent (southernmost 9.3 acres) of the site travels into a low area on the southwest corner of the site and then into a ditch along the east side of • Duvall Avenue NE. Drainage from approximately 1.2 acres on the southwest corner of the site travels off of the subject property to the south. The northwest portion of the property (approximately 1.4 acres) drains into the Duvall Avenue NE ditch at the north end of the property. Drainage then moves through the ditch in a southerly direction. • There are approximately.24.7 acres of neighboring property to the north and east of the site which contribute drainage flows which cross the subject property. Approximately 19 acres of that • nearby property is developed with residential uses; the remainder is vacant, forested area. • There is an intermittent stream in the vicinity of the northeast corner of the site. A drainage channel which runs through the center of the Forrest Creste site conducts runoff from approximately 10 of the 24.7 acres identified. r-- Runoff from the site and tributary areas runs along the above-described ditch on the east side of • Duvall Avenue to a point approximately 600 feet south of the site, where the channel crosses I Duvall Avenue NE through a culvert and travels west for about 1200 feet through heavily 11 vegetated land at a relatively flat slope. The channel also receives inflows from the area west of Duvall Avenue NE to the north. It then travels south, crosses NE 4th Street and joins with )l Maplewood Creek approximately 2,500 feet downstream from the site. The creek then flows ,' south through a steep ravine, crosses the Maplewood Golf Course and enters the Cedar River. Z I�(l.r_,� ! I i At the current time, there is occasional flooding near the culvert crossing (Duvall Avenue/north of NE 4th Street) and east of the Duvall Avenue/NE 4th Street intersection. Localized flooding has also been identified in the areas of the ravine and the golf course. There has also been some 11 flooding and scouring from erosion noted at the Windsor Place Culvert that flows under • • Bremerton Avenue NE on the shared boundary between the recently approved Orchards and Windsor Place apartments. • The existing drainage patterns will be modified on the site during periods of construction activity (e.g., reconfiguration of soil slope) and during operations (based upon the increased volumes and changed routes, occurring from the greater amount of impervious surface in the completed project). However, as a result of required Construction Mitigation Plans, and development- related improvements required to the site under the City's Surface and Storm Water Drainage Ordinance (modeled on the King County Surface/Storm Water Management Ordinance [KCSWM]), the character and quality of storm water runoff will likely be improved above what it is now on the site in its natural state. With the proposed development, the peak runoff rate from the developed site will be required to be no greater than pre-development peak run-off rate. Specifically, in establishing a storm water management system for this site, the applicant will be called upon to provide a Level 2/Level 3 storm drainage analysis and a solution, consistent with 'I the KCSWM. This solution would entail provision of a wet pond and detention pond (approximately 100' x 190' x 5'), control structures, oil/water separators and a series of biofiltering drainage swales, to be coordinated with wetlands, so that these sensitive areas are not endangered. It would also be desirable to employ the existing natural drainage channel and to have an infiltration system, if feasible to do so, and if the underlying aquifer could be protected • FORREST CRESTE MITIGATION DOCUMENT •6- I SEPTEMBER 22, 10112 i . • With such a system. The necessary studies will be provided and conceptual plans developed and approved by the City in conjunction with site plan review (as required by the City's Surface and Storm Water Management Ordinance). Additionally, the City's Utility Systems Division has determined, through the Maplewood Creek Drainage Basin Study, that increasing the capacity of the Duvall Avenue culvert would eliminate _A most flooding problems. The City's proposed Capital improvement Program includes a plan to Improve the culvert; if funding for that improvement is based upon "fair share contributions" on ,• / the part of beneficiaries, then it is likely that Forrest Creste would be included in the district assessment. • • The tributary area to the site also hosts some septic tank systems which are failing, which could lead to contamination of this site through runoff. King County Health Department and the City of Renton would work together to address such a circumstance. . RECOMMENDED MITIGATION MEASURES: A.3.c) No specific mitigation measures for surface/storm water management are required in conjunction with the Environmental Mitigation Document as mitigation of on-site adverse will be achieved through compliance with the City Surface and Storm Water Management Ordinance (4-22). '# Note to Applicant #2: Under the Surface and Storm Water Management Ordinance, • improvements will be required to address on-site surface/storm water impacts and off- site adverse surface/storm water impacts (both in the local areas of the drainage basin and in the downstream section of the basin) • Required storm water management analyses and improvement systems (e.g., detention ponds, control structures, swales) will be conducted and improvements planned/installed • in keeping with the requirements of the King County Surface Water Design Manual �' (KCSWM), as established in the City's Surface and Storm Water Management • Ordinance. By Ordinance mandate, conceptual storm water management plans must be approved in conjunction with site plan review. Also see Recommendations A.1 ("Earth"), A.4 ("Wetlands"). No other mitigation measures are considered to be necessary to address surface/storm water management impacts. Policy Nexus: Not applicable • c) Wetlands Impacts: Two wetland areas have been identified on the Forrest Creste site. Wetland #1 is 11 located next to Duvall Avenue NE on the southwestern corner of the property. Approximately .61 acres of this wetland area is located within the Forrest Creste property, however, the wetland extends beyond the site boundaries to the south (onto the site of The Orchards); its total size is • 1; approximately three acres. Within the boundaries of Forrest Creste, Wetland #1 is identified as a Palustrine Forested wetland based upon the United States Fish and Wildlife Service (USFWS) classification system. The Department of Ecology has designated Wetland #1 as a Class II wetland — that is, a wetland which is defined by soils, water quality and water quantity which support wildlife habitat and diverse vegetation communities. Similarly, the wetland would be identified as Class II or High Quality, under the City's Wetlands Management Ordinance. • ll The on-site portion of this wetland is dominated by red alder, black cottonwood, Oregon ash and • salmonberry. Creeping blackberry, sword fern and lady fern are abundant as well. This wetland receives water from runoff from the surrounding upland areas. Overflow from the roadside ditch • adjacent to Duvall Avenue NE also appears to accumulate In the wetland. This wetland has • moderately high value for flood control,water quality improvement, and ground water exchange, • • FORREST CRESTE MITIGATION DOCUMENT .7• SEPTEMOER 22, 1992 1i • • • • • Wildlife Inventories conducted for this area indicate features which would provide habitat for passerine birds and a variety of mammals, including mountain beaver, chipmunks and chickaree during the wet seasons. During this same time period coyote, raccoon, and skunk may hunt the area for salamanders and Pacific tree frogs. Because of the small size of the wetland and the limited duration of the period of standing water, the wildlife habitat is not outstanding. Additionally, no endangered or threatened species were identified: This wetland is planned to remain essentially undisturbed; a small amount of filling may be required at the south end of the wetland in order to support construction of NE 6th Street. Environmental impacts related to the development of the roadway (including affects upon wetlands) will be addressed under a separate study; the roadway study would include an examination of routes which bypass the wetland areas. The studies related to the expansion of NE 6th Street are outside of the purview of this project because the new roadway is not required to allow development of Forrest Creste. In the event that NE 6th Street is developed, and in the event that filling of Wetland #1 on Forrest Creste is required, it would be subject to conditions established in the environmental mitigation document for the roadway, and subject to the conditions listed below as well. Wetland #2 is located on the northwest corner of the property adjacent to Duvall Avenue. It is .03 acres in size. It is defined as a "palustrine shrub/scrub wetland" under the USFWS classification system and is defined as a Class III wetland by the Department of Ecology. Dominating vegetation includes red dogwood, blackberry, red alder, buttercup and large leaf avens. Reed Canary Grass and bentgrass are abundant. A portion of this wetland has been previously filled. The wetland receives water from a roadside ditch on Duvall Avenue to the north of the site and from adjacent upslope properties to the east. It has a moderate to low value for flood control and it offers no significant water quality improvement or ground water exchange; there is no substantial habitat area here. It would be a Class III (or limited quality) wetland under • the City's Wetlands Management Ordinance. Based upon the .61 acre size and the classification as a high quality wetland under City • standards (Wetlands Management Ordinance No. 4346), and under Department of Ecology and USFWS, as described above, the applicant is required to provide improvements in a manner consistent with local Ordinance requirements. Applicable regulations would include the Wetlands Ordinance, the Landscaping Ordinance and the Surface and Storm Water Management Ordinance. These documents establish standards for set backs (50 feet for • Wetland #1 which is defined as a Category II or high quality wetland), for plantings, and for drainage controls. In order to achieve compliance with these regulations, the final Wetlands Management Plan would be required to accomplish the following objectives: • • To minimize disturbances to existing wetlands that serve a valuable biological or habitat function; • To protect wetlands from adjacent uses when such uses could threaten the biological or habitat value of the wetland; • i • • To ensure that there is no net loss of wetland acreage on the site; • • To replace, restore or enhance the disturbed portions of existing wetlands; • To improve the quality of surface waters entering wetlands; • • • • To improve the quality of surface waters entering the ground water system; • To ensure the long-term viability of the post-development wetland area; • Tho proposed development includes a conceptual plan for improvements for Wetland #1 which can be specifically designed to achieve compliance with the City's Wetlands Ordinance, the • E4 FORREST CRESTE MITIGATION 00CUMENT •a- SEPTEMOER 22,1002 f� • • • Surface and Storm Water Drainage Ordinance, and related applicable Hiles and policies; the t proposed action includes the establishment of set back areas, develop and implement planting i plans, install pedestrian trails, develop partial drainage •swales, construct a drainage control structure. Wetland #2, because of its small size •(.3, acres) and its limited quality, is exempt from the provisions of the Wetlands Management Ordinance, generally; however, wetland itself will not tic disturbed and buffers will be provided. Further, all improvements provided on the periphery of this wet area (e.g., plantings, pedestrian access points, drainage features) will be required to be complement the wetland ecosystem. For reference, an exhibit showing the location and size of each wetland is attached. • RECOMMENDED MITIGATION MEASURES: A.4.a) No specific mitigation measures for wetlands protection/management are required in • conjunction with the Environmental Mitigation Document as mitigation of on-site adverse impacts will be achieved through compliance with the City's Wetlands Management Ordinance (No. 4346). Note to Applicant #3:. The Wetlands Management Ordinance requires the applicant to • submit a specific Wetland Mitigation Plan for wetlands, wetland buffers, and drainage swales indicating construction detail— (in uding schedule), vegetation plans (except for unchanged wetlands), hydrologic regime, boundary and buffers.(as appropriate) for each wetland, wetland buffer, and drainage swale. The Ordinance, similarly, requires the applicant to develop and implement a five year monitoring plan (e.g., sampling, reporting). and a surety device commensurate with the value of the plantings to ensure • replacement of materials as necessary. The Wetland Mitigation Plan shall be approved ;; by the Planning Section of the Development Services Division prior to the issuance of ' ; any site preparation/building permit. A.4.b) The applicant shall, in order to enhance the value of the wetland as a natural habitat and. as an educational amenity, provide adjacent to Wetland #1, a pedestrian trail and observation areas (with interpretive signing concerning the purpose and function of the . wetland/native growth protection areas at appropriate locations). The plan shall be approved by the Development Services Division in conjunction with site plan review. I• A:4.c) The applicant shall, in order to'limit potential impacts on water quality and wildlife • i habitat, not excavate the existing wetland to create an open water component. i Note to Applicant#4; In the event that filling of any portion of Wetland#1 is cLetermined i, • to be necessary to accommodate future const Colon of NF sth Street,the applicant must_ develop a Fill Plan which is consistent with_requirements e tablished under the Wetlands Management Ordinance. The amount of filled and newly-created, enhanced or restored wetland area shall be determined during the site plan approval process if the 1'. independent studies for NE 6th Street have been completed; if these studies have not i been completed, future supplemental review of wetland fill plans may be required. If necessary to prevent the filling of wetland areas merely to create a buffer between the - • wetland and the new road alignments, adjustments (averaging) of buffers may be • approved by the Planning Section of the Development Services Division next to the road alignments for NE 6th Street. .I i In the event that the alignment selected for NE 6th Street, In the environmental review ll for that project, does impact the Forrest Creste site, then it is likely that the applicant will be required to comply, as well, with the conditions mandated in the NE 6th Street study. • FORREST CRESTE MITIGATION DOCUMENT =9• SEPTEMOE R 22, 1902 • • ll • • • • 11 • Policy Nexus: WAC.197-11-660; Environmental Review Ordinance, 4-6; King County Surface • Water Design Manual; Comprehensive Plan LB), I.C., I.D., I.E., I.F., I.G., l.H., III.D., III.E., and VIII.C:; Wetlands Ordinance. 5. Natural Habitat Impacts: The site:is essentially vacant and heavily vegetated. Native upland vegetation includes trees (middle-aged fir, cedar, maple, vine maple, and alder), large shrubs (vine maple, Oregon grape, huckleberry, etc.) and.a variety of species of undergrowth plants—such as trillium,wild geranium, ferns, mosses and typical wildflowers. Wetland vegetation, described above,includes alder, maple, fir, salal, Oregon grape, ferns, and berries;.functionally, the wetlands serve as detention ponds for surface water runoff in the wet seasons of the year. The wildlife community varies, widely but contains species generally found in and adjacent to highly urbanized areas lacking unique habitat features. Animal species on the site are primarily migratory. These would include chickaree, chipmunks, coyote, raccoon, rabbit and skunk; amphibian populations may be found in the area during the wet seasons. Evidence also indicates the possible intermittent• temporary use of the site by mountain beaver and deer. Because of the planned removal of most of the existing vegetation, the size and composition of the wildlife community will be changed. Most existing • animal communities will avoid migrating to this site, and will move to the remaining habitat:areas.nearby. • Urban-tolerant animals will remain on the site in landscaped areas and where tree cover is maintained or replaced. Conversion of the contiguous forested areas into fragmented tree groves within residential areas will favor edge species of birds. Based on a preliminary tree survey of the property and on the proposed site plan, a substantial number of the numerous evergreen and deciduous trees of greater than 8-inch diameter could likely be retained; I' similarly, a sizable number of smaller trees would be retained or introduced onto the site. Additional li native vegetation could be retained on-the site; new plantings could be based upon a native vegetation II! palate. Screening around site boundaries could be designed to facilitate "pass through" by mammals •• and birds,while providing privacy and defensible space for Forrest Creste residents and their neighbors. RECOMMENDED MITIGATION MEASURES: • A.5.a) The applicant shall, in order to limit the impacts of the development' on the wildlife community, work with the Department of Wildlife, to develop a plan for wildlife management (e.g., relocation • where appropriate) during the period of transition of the site from the natural to the built ; I • • • environment. A.5.b) The applicant shall, in order to limit the impacts of the development on the existing habitat, prepare a Landscape Plan which retains significant trees on the site and which provides for a i I • • • variety'of landscaping elements. The Plan shall be accompanied by: 1) An amended tree survey of the property indicating the evergreen and deciduous trees of greater than 8-inch diameter at breast height; • 2) A tree preservation plan which retains the maximum feasible number of trees of eight inches or greater in diameter in areas to be retained as open space under the approved site plan. The plan should indicate each of those trees of eight inches or greater in diameter that are planned to be retained and those trees of eight inches or greater In diameter that are planned to be removed in these areas. 3) A plan and restrictive covenant describing proposed performance and replacement I' standards for new landscaping elements and retained trees,, exclusive of those In wetlands and wetland buffers,which shall include provisions for. (i) , Replacing all removed trees greater than 12 Inches In diameter with three new two-inch caliper native species trees (primarily,evergreen such as Douglas flr or FORREST CRESTE MITIGATION DOCUMENT •10. SEPTEM©ER 22',1092 I 1 Cedar) in preserved open space areas (defined as fifteen feet from the edge of ;f buildings and/or drives), and maintenance of those trees over the life of the project. (ii) Replacing all removed trees greater than eight (8) inches but less than 12 inches in diameter with two new.2-inch caliper native species trees(primarily evergreen such as Douglas fir or Cedar); and maintenance of those trees over the life of the project. (iii) Providing a landscaping plan which shall contain extensive landscaping around the perimeter of the project area and at other appropriate locations. Specifically, landscape elements within the site shall be planned to consist of native vegetation elements (with an emphasis on species which provide habitat and/or food sources), to establish a consistent overall character for the proposed project or for distinct portions of the project. Landscape elements shall also be of sufficient density, height, and variety to provide year-round screening between the site and neighboring residential uses and public rights-of-way. •• Note to Applicant #5: The Landscape Plan, tree survey, and proposed performance and replacement •. standards shall be submitted to the Planning Section of the Development Services Division for review and approval prior to the issuance of building permits for the development of the approved site plan. Note to Applicant : At the time of site plan review, staff will likely recommend that the applicant be called upon to provide: a) a landscaping maintenance agreement, to be valid for the life of the project, which describes pruning systems, fertilization systems, and pest control systems; and b) a landscaping surety device (equivalent to ten percent of the value of the plantings) to be valid for the life of the project to guarantee that any new landscaping element that dies during the first three years after installation will be replaced. A Homeowners'Association will likely be established to implement these requirements. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; Comprehensive Plan I.C.,.1.D., I III.C., and III.D; Landscaping Ordinance 4-31-34; Land Clearing and Tree Cutting Ordinance 4-9. B. BUILT ENVIRONMENT • 1. Land Use/Housing Impacts: The project requires rezones, site plan approvals, and demolition, filling, grading, and building permits. The existing zoning is G-1, General Use, which would allow uses such as residential development, agricultural activities, raising of livestock and a variety of public recreation facilities (e.g., golf course). The proposed project includes an application to designate the entire site for R-3 use; the R- 3 zone (Medium-Density Multi-Family) would permit a maximum of 25 multi-family residential units per acre. The current Comprehensive Plan designates approximately the southern two-thirds of the site — 8 acres — for medium-density multi-family use, which would allow a maximum of 25 units per acre. The remaining northern one-third (4 acres) of the site is designated for low-density multi-family development which would allow a maximum density of 12 units per acre. The proposed density level, at 17 units per acre, would then be generally permitted with both the underlying low-density and medium-density residential use designations. , Development of this site with residential units would be in keeping with the King County Growth Management Policies (e.g., designation of the site as an urban growth area, provision of diversity in housing types). With up to 200 townhouse and traditional apartments, Forrest Creste would provide needed multi-family housing opportunities, No significant environmental impacts with respect to land use or housing impacts are identified. FORREST CRESTE MITIGATION DOCUMENT .11• SEPTEMOER=I, 1992 • RECOMMENDED MITIGATION MEASURES: B.1.a) No mitigation measures are required with this Mitigation Document. Note to Applicant #7: In order to ensure continuing compliance with City policies and programs, staff may recommend in favor of a contract rezone, which establishes development densities ..and' - performance standards, at the time of the Hearing Examiner's review of the rezone application. Note to Applicant #8: At the time of site plan review, staff may recommend that the applicant be called upon to provide a modification to the design and siting of structures, landscaping, and other services/amenities, pursuant to review under the Site Plan Review Ordinance. 2. Transportation The proposed project is located in a residential area which is in transition from rural and suburban to more urban level densities. Future development is anticipated to occur at a density commensurate with the urban designation assigned to this area by King County and the City. Providing adequate roadway systems is necessary to support local users and through commuters. • Local roadways in the vicinity of and serving the site are NE 4th Street, NE 3rd Street and NE Sunset Boulevard which serve as major east-west arterial streets. Duvall Avenue NE, Union Avenue NE, and Monroe Avenue serve as the north-south arterial routes. Studies of the project area were conducted using Policy Guidelines for Traffic Impact Analysis of New Development. These studies indicate that current average daily traffic (ADT) for the major roadways in the study area includes 30,000 ADT for NE 4th Street and 34,000 ADT for NE 3rd Street. NE Sunset Boulevard is the third most traveled road, with traffic volumes of 22,400 ADT. Duvall Avenue NE, adjacent to the proposed Forrest Creste complex, currently canies 7,000 vehicles. The majority of these trips will originate and end outside of the City of Renton. The traffic study conducted for the EIS estimates that the project will generate 1235 daily trips I I and 137 afternoon peak-hour trips. When these trips are added to the predicted 1993 traffic volumes at the five area intersections analyzed, all intersections would continue to operate at Level of Service (LOS) D or better, except that LOS E could occur at the NE 4th Street/Union Avenue NE intersection at the afternoon peak hour (based upon anticipated levels of development at sites which would be anticipated to result in additional trips along this travel corridor). Based on City standards, LOS D or better is considered acceptable, so the project • would generally not cause traffic operations to fall below City standards at intersections in the area. At • the NE 4th Street/Union Avenue intersection, in the event that the anticipated LOS E occurs, it will be addressed by improvements slated to be installed by the City under the East Renton (NE 3rd/4th Street) Transportation Benefit District: improvements would be funded by contributions from developments ' within the District boundaries or within the"sphere of influence"as described below. Specifically, staff note that while Forrest Creste is outside of the Benefit District, the City will call for the applicant to participate in the District to a fair share, based upon study findings which indicate that the project is in the "sphere of influence" affected by the District, and findings which indicate that there will be impacts from the project on District roadways. For example, in conjunction with the Benefit District, the applicant may be called upon to participate in improvements (such as improvements to signalization and/or monitoring of traffic volumes/pattems) to NE 3rd/4th Street at intersections with Duvall Avenue, Monroe Avenue, Jefferson Avenue, and Union Avenue should result in protection/creation of satisfactory • service levels. Additionally, the applicant must make improvements, to City standards, to all surrounding residential streets and neighborhood collector streets where impacts occur which arc directly attributable to the project For example, the applicant would be called upon to provide an additional eight feet of right-of- way on Duvall Avenue NE and to install a left turn land parallel to the project site; lane paving, curbs, gutters, sidewalks, and street lighting would be required along that corridor as well. These construction , requirements will result in roadways of adequate size and with appropriate improvements (e.g., travel lanes, turn lanes, signals/signs, curbs, sidewalks, street lighting), to allow safe, efficient movement of ' FORREST CREST[MITIGATION DOCUMENT .12- SEPTEMfER 22, 1992 t. anticipated vehicular and pedestrian traffic. At the time of site plan review, staff may call upon the applicant to extend street improvements (curbs, sidewalks, gutters) along Duvall Avenue from the north property line of the site to the intersection with SE 121st Street; this extension would provide a logical boundary which would facilitate safer pedestrian travel along this corridor. Further, the applicant will be called upon to participate in the future construction of the NE 6th Street extension, in accord with City requirements; this road would be constructed when-sufficient fees are available from both Forrest Creste and the Orchards to install improvements. Future studies conducted under the direction of the City will determine the design, siting and construction of that roadway. With respect to on-site vehicle circulation impacts, the applicant is proposing to provide primary access from Duvall Avenue at this time, with a second access provided from NE 6th Street, when funding is available to do so. A gated emergency access will be provided on the northeast corner of the site (140th Avenue NE). The project-generated traffic is projected to use Duvall Avenue NE (either via direct access and/or via access from the likely extension of NE 6th Street), leading to Sunset Boulevard or NE 4th Street. The applicant must construct internal roadways and related on-site improvements curbs, • gutters, sidewalks, general directional signs, and fire lanes) to comply with City codes (e.g., Subdivision Ordinance 9-12-8; Streets and Arterials Plans); at the time of site plan review, it is likely that the City will call for a gated bridge over the detention pond to ensure the availability of contiguous roadway for • emergency vehicles. The applicant has proposed to provide.1.75 designated parking spaces per unit, in. accord with . ' requirements established in the Parking and Loading Ordinance (4-14). Additionally staff will call for the provision of adequate space for tandem parking adjacent to garages, in a manner which does not intrude into commuter or emergency vehicle travel lanes. In order to further ensure the continuing availability of travel lanes for resident's vehicles and emergency service vehicles, the applicant will be required to provide a vigorous management system for enforcement of parking restrictions and a surety bond in the amount of'S50,000.00 to reimburse the City for costs incurred in enforcement of City regulations. With I these mitigation measures, the project would provide for efficient on-site.travel and would not cause any 1;. adverse impacts on the parking supply in the surrounding area. (In the event that the number of units is I' a •:' reduced, parking spaces would likely be removed from the east side of the property to provide f'1 opportunity for a greater planted buffer between the site and property to the east.) I Pedestrian pathways planned for this project will be designed to provide access to nearby developments, i to public roadways, and to transit stops. Transit service is provided to the project area by Metro,routes #111 'and#147 on NE. 4th Street. These 1 routes provide service to downtown Renton, South Bellevue, and downtown Seattle. According to Metro, a proposed service change for 1992 has been proposed for route 240 to serve Coal Creek Parkway, 1 • Duvall Avenue NE, and NE 4th Street. This route would operate seven days a week and provide direct ;:I • �service to downtown Bellevue, and offer connections at the South Renton Park and Ride with Metro service to downtown Seattle and South King County destinations. This route would become the main r 1, transit service for the proposed project. Provisions for a METRO bus stop will be recommended. •Truck traffic in the area would likely increase during the periods of construction activity. Because this i • traffic will operate prior to the installation of any traffic improvements adjacent to the project site, it could increase the risk of accidents on Duvall Avenue NE and Union Avenue NE. Truck traffic after i. completion of the project will be minimal, as it will consist only of delivery vehicles 'and occasional I moving vans. • . To mitigate the increased demand placed on transportation facilities by the uses in the proposed project, I ; a variety of transportation mitigation measures are being recommended. They can be grouped into the following categories; i I . a) Participation on a "fair share" basis In the NE 3rd/NE 4th Street Traffic Benefit Zone in order to ' • provide support for improvements to the local roadway network(e.g., Duvall Avenue NE., NE 6th , Street construction; signalization improvements at intersections along the NE 3rd Street l i; corridor); these actions would supplement those improvements required by City Code (e.g., • • • Renton Subdivision Ordinance) for the proposed development; FORREST CRESTE MITIGATION DOCUMENT , •I3• ' ' SEPTEMOER 4,1092 b) Physical improvements to mitigate the dependence on single occupancy vehicles by encouraging the use of the proposed new transit service on Duvall Avenue NE: c) A Transportation Management Plan (IMP) designed to decrease the dependence of residents on single occupancy vehicles; d) Facilities to encourage the use of bicycles for commuting thereby mitigating the Impacts associated with dependence on automobiles. Additionally, mitigation measures are proposed to reduce the impacts of construction traffic on adjacent streets and residential areas. RECOMMENDED MITIGATION MEASURES: B.2.a) The applicant shall, in order to reduce project-generated traffic impacts on the NE 3rd/NE 4th Street corridor, either: i) provide direct improvements to the NE 3rd/NE 4th Street corridor, pursuant to direction by the City's Transportation Services Division; or ii) contribute a "fair share" traffic mitigation fee for the NE•3rd/NE 4th Transportation Benefit District of$124.00 per average weekday trip. The direct improvement plan or the Traffic Mitigation Fee is to be established at • • the time of application for a Building Permit for any element of the proposed project. The direct improvement plan or the fee option is to be based on the number of average weekday trips attributable to the District from the project. If the applicant elects to construct direct improvements, they shall be installed prior to the issuance of the Certificate of Occupancy for the project. If the applicant elects to pay a fee, that fee shall be paid prior to the issuance of the Building Permit. (Note: The fee would be $153,000.00 for the proposed 200 unit complex, based upon the 1235 ADT level). • • Note to Applicant #9: If the applicant cancels the Building .Permit in writing, then the I�I unencumbered portion of the fee plus accrued interest may be refunded to the applicant. B.2.b) The applicant shall, in order to reduce project-generated traffic impacts on Duvall Avenue. NE deed up to eight feet of additional right of way, if necessary, on Duvall Avenue NE prior to widening of the street to five (5) lanes. The applicant shall receive a credit toward the Traffic • Mitigation Fee for the value of any street right-of-way which exceeds that required by City ordinance(s). lI Note to Applicant#10: In addition to the above-described dedication, the applicant will be called upon to construct roadway improvements on Duvall Avenue NE abutting the site (e.g., curbs, • gutters, sidewalks, street lighting) and install a left turn lane on Duvall Avenue adjacent to the project site as required by the Renton Subdivision Ordinance (9-12). At the time of site plan review, staff may also recommend extension of selected right-of-way improvements (curbs, gutters, sidewalks) along Duvall Avenue north to SE 121st Street in order to protect pedestrian safety between the site and nearby commercial/institutional developments ;` • which are likely to be utilized by Forrest Creste residents. B.2.c) The applicant shall, in order to provide necessary secondary ingress/egress to the site, participate to a fair share in the construction of NE fith Street as a full width neighborhood collector street. Participation will include, but may not be limited to dedication of a thirty (30) • foot right-of-way, installation of paving, curbs, gutters, sidewalks and street lighting, installation • of a vehicle turnaround (to standards established in the Renton Subdivision Ordinance). The applicant shall receive a credit toward the Traffic Mitigation Fee for the value of any street right of way which exceeds that required by City ordinance(s) OR the applicant shall be reimbursed through a Latecomers Agreement for the value of any street improvemenl(s) which exceed that required by City ordinance(s). • FORRESTCRESTSMITIGATION DOCUMENT •1•' SEPTEMBER 2.2, 1002 • B.2.d) The applicant shall, in order to reduce traffic impacts associated with the reliance upon single occupancy vehicles, provide direct pedestrian access routes from internal residential streets to Duvall Avenue NE to encourage the use of proposed new transit service on Duvall Avenue NE. Pedestrian routes to Duvall Avenue NE must have hard surfaces and adequate pedestrian-level lighting to provide safe use during low light hours. The pedestrian routes and lighting shall be approved by the Planning Section of the Deveiopment Services Division as part of the site plan approval process. B.2.e) The applicant shall, in order to reduce traffic impacts associated with the reliance upon single occupancy vehicles, prepare a Transportation Management Plan (TMP), prior to Issuance of the Building Permit for any element of the project. The TMP must contain at least the following provisions: 1) A.designated transportation coordinator to promote and coordinate the use of public transportation and high occupancy vehicles; (this person could be,a manager or resident of Forrest Creste); 2) A free one-month bus pass made available to each new tenant at the time of occupancy (peak hour, two zones); 3) The distribution of site-appropriate transit and ride sharing information to new tenants and annually to all tenants; 4) Secure bicycle parking in, or reasonably close to, each multi-family structure; 5) An annual transportation survey and monitoring report submitted by the transportation • • coordinator to the Transportation Services Division. • B.2.f) The applicant shall, in order to ensure adequate emergency access to the site, provide: • P 1) a gated entry route via 140th Avenue NE, which is restricted to use by emergency vehicles. Plans for this access (right-of-way, paving, etc.) shall be approved by the Development Services Division and the Fire Department during site plan review. This access route shall be available during construction and operation of the Forrest Creste development. 2) a reservation of right-of-way of sufficient width to accommodate City street standards for • r, any future extension of 140th Avenue SE that traverses the subject property; provided that such reservation shall terminate six years after the issuance of the Certificate of Occupancy for the Forrest Creste development. • • • B.2.g.) The applicant shall, in order to ensure adequate emergency vehicle access to the site, shall provide an emergency services management plan which includes a strong educational • component and vigorous enforcement of parking restrictions to ensure that persons do not park illegally on this site in areas which are required for circulation and/or emergency vehicle access. This plan is to be accompanied by a provision for a renewable emergency services protection is • . surety device, in the amount of S50,000.00, to be instituted following any calendar year in which ten (10) or more parking citations are issued for Forrest Creste. This device is to be valid for a minimum three (3) year period from the last reported violation; this plan and surety device are intended to assist in ensuring the preservation of the required right-of-way for resident's and emergency vehicles. The plan and the surety device are to be approved by, and the fee paid to the Development Services Division prior to the issuance of the Certificate of Occupancy. Il• B.2.h) The applicant shall, in order to encourage Increased use of public transit, contribute a fair share toward the provision of a concrete base and necessary easement for ono transit shelter on • FORREST CRESTE MITIGATION DOCUMENT .IS. SEPTEMBER 2.'', 1002 • Duvall Avenue NE, Location of the transit shelter base and easements shall be coordinated with `I The Orchards and other neighboring developments; It shall be approved by Metro, and the Development Services Division, as part of the site plan approval process. B.2.l) The applicant shall, in order to address traffic safety impacts, work with the Renton School District to determine a fair share contribution for a school bus shelter on or adjacent to the project site. Plans for this-school bus stop shall be approved by Development Services Division In conjunction with site plan review for Forrest Creste. The school bus shelter shall be installed prior to the issuance of the Certificate of Occupancy. • B.2.j) The applicant shall, in order to reduce local and regional traffic impacts (and related dust and noise impacts) caused by construction vehicles, provide the following plans/systems, to be approved by the Transportation Services Division prior to issuance of any site • preparation/building permits: 1) temporary traffic control measures on Duvall Avenue NE. during periods of site preparation and construction; • 1 • 2) specific planned off-site hauling routes; 3) an internal looped emergency access route to provide emergency services-personal access to all areas of the site at any time during the preparation and construction of the development; - 4) an agreement to confine operation of construction vehicles on nearby residential streets, limit construction vehicle access to the site to Duvall Avenue NE; • 5) an agreement to restrict hauling activities at the 1-405 and NE. 4th Street and at 1-405 and Sunset interchanges to the hours of 8:30 AM to 3:30 PM or submit a hauling route plan for peak hours which avoids these interchanges; and • 6) an agreement.to restrict construction activity on the site to the hours of 7 AM to 8 PM, Monday through Saturday. No construction activity shall be permitted on Sundays or holidays. • Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; Washington State Second Substitute House Bill 1671 (SSHB 1671); City of Renton Six-Year Transportation Improvement Program; City of Renton Resolution 2769; Comprehensive Plan I.a), VlI.a), VII.b), VII.C., and VII.H.; Northeast • . • Quadrant Plan. 3. Public Services i . The EIS identified a number of potential impacts and possible mitigating measures for police and fire service,schools, and parks and recreational facilities. a) Police • • ' The project is located in District Nine of the Renton Police Department. This zone is developed • primarily with residential uses. The response time for emergency calls averages just under three ‘' minutes and for non-emergency calls just under ten minutes. This level of service is provided by a force which averages 1.9 officers per 1,000 population. f, The residential project is anticipatedto generate 88 annual calls for police service. No increase in the number of police officers Is anticipated to maintain the current ratio of officers to population, to meet the Increased demand placed by the 360 residents of Forrest Creste. FORREST CRESTS MITIGATION DOCUMENT -10• SEPTEMOER 22,1002 • • • In order to ensure that adequate resources are available to serve the residents of Forrest Creste, staff will recommend that Forrest Creste be required to provide a surety device to emergency fund service levels above those anticipated for this development. Additionally staff have 'recommended the provision of congregate areas which would enable residents to become acquainted with one another and, thus, be more aware of intruders onto the site. Finally, at the time of site plan and building review, staff will make specific suggestions for improvements such as security devices, lighting, and alarm systems which are useful tools to reduce crimes against persons and property. RECOMMENDED MITIGATION MEASURES: B.3.a) The applicant shall, in order to reduce the potential impacts on the existing police force, voluntarily provide-a renewable extraordinary police services surety device in an amount of $10,200.00, to be valid for a'period of three (3) years, and to be approved by the • Police Department and the City Attorney. The surety device is to be provided prior to issuance of a Certificate of Occupancy. The surety device will be drawn on in the • amount of$75 for each multi-family residential police service call that exceeds twice the annual average number of calls per multi-family residential unit in the City of Renton times the number of units for which a Building Permit 'is being sought. If the surety device is drawn on in an amount less than $3,400.00 in the first year or less than $66,800.00 in the second year, the amount of the device for the subsequent year may.be reduced accordingly. . • Note to Applicant#11: If fewer than 200 units are constructed, the amount of the bond will be reduced accordingly. Policy Nexus: WAC 197-11-660;Environmental Review Ordinance, 4-6. , Ij b) Fire The project is located on the eastern edge of the Renton Fire Department's first response area. First response fire service would be provided to the project by Fire Station #12 (the Renton Highlands Station),which is located at NE 9th Street and Harrington Avenue NE. Currently, Fire •- ,1 • Station #12'is staffed by five personnel and is equipped with one engine company and one aid car. • The Fire Department estimates that the proposed project would generate approximately 20 i 1 additional calls (e.g., fire, health emergency) per year based on the average number of calls for ' 1 . projects similar to the proposed 200 unit project. Response time to the project from this station would range from 5 1/2 to 6 minutes. According to the 1987 Fire Department Master Plan, an acceptable first response time is defined as having 5 firefighters on the scene in 5 minutes or +! less. Acceptable emergency aid response time is defined as having an aid car on the scene in 3 j I • minutes or less. • i Mitigation measures would include provision of Code mandated on-site improvements such as emergency access routes (during construction and operation): hydrants, signage, illumination, alarm systems, and sprinklers. The provision of management plans and a surety device to ensure In the preservation of the required right-of-way for emergency vehicle travel will be required (see Transportation). The applicant will also be required to participate to a fair share contribution to the,City's Fire Benefit District (Resolution #2931) toward the construction of new fire facilities in the City of Renton. The fee for this project would be $389,00 per unit. • i FORREST CRESTS MITIGATION DOCUMENT •17. SEPTEMeER•22,1002 ' t RECOMMENDED MITIGATION MEASURES: B.3.b) No mitigation measures are considered to be necessary In conjunction with environmental review. Note to Applicant #12: The applicant will, be required by City regulation to install on-site improvements to address fire prevention/suppression standards and will also be required to contribute to the Fire Benefit District(pursuant to Resolution#2931) at a rate of$388.00 per unit. (Also see "Transportation') Note to Applicant #13: If the applicant cancels the Building Permit in writing, then the unencumbered portion of the Fire Benefit District fee plus accrued interest may be refunded to the applicant. c) Schools The proposed project is located within Renton School District Na.. 403. Students in the area attend Maplewood Heights Elementary School, McKnight Middle School, and Hazen High School. Using the Renton School District's student-per-household multipliers, the project would result in 45 elementary school students, 11 junior high school students, and 10 high school students. In September of 1990, Maplewood Elementary School was 3 students below capacity, McKnight Middle School was 285 students below capacity, and Hazen High School was 434 students below capacity. Depending on the timing of occupancy of the various residential portions of the project and depending on future enrollment trends, the project could generate a demand for student spaces for elementary schools which exceeds the capacity of Maplewood Heights Elementary School. However, as there is a considerable amount of approved residential development underway in the immediate vicinity of the site and on nearby properties, it is likely that improvements required to serve Forrest Creste would be in place prior to the development of the project. . I • The applicant will be encouraged to work with the School District to mitigate project-related impacts to local schools. RECOMMENDED MITIGATION MEASURES: • B.3.c) No mitigation measures are established in conjunction with environmental review. ' •i • Note to the Applicant #14: The Renton School District (#403) currently has no Mitigation Fee Plan in place; therefore, there is no nexus which permits the City to assess a mitigation fee for Forrest Creste. However, the applicant is encouraged to work with the School District to develop • and implement a plan for mitigation of any impacts from the project to the District. d) Parks and Recreation The project contains active recreational facilities for the residents of the townhouses and apartments. For example, a recreation center will be provided which contains facilities such as • an exercise room, lounge, and cabana/meeting room facility. There will also be an outdoor • swimming pool. In addition, one sports court and several children's play areas are provided throughout the site. Finally, a pedestrian walking/jogging trail winds through the site, providing both an active exercise amenity and an opportunity to observe the wetlands areas (benches/Interpretive signs). • • Passive recreational open space in the project includes the wetlands and buffers and the landscaped areas surrounding the townhouses and apartment buildings. Additionally, pedestrian FORREST CRESTE MITIGATION DOCUMENT •10- SEPTEMBER 22,1902 • pathways are planned through each of the apartment areas containing recreational centers; a •• pedestrian linkages to the nearby Orchards will be encouraged as well, both as a recreational • amenity and to facilitate pedestrian travel/access to public transportation. Staff will recommend the addition of congregate areas around mail box centers, including covered benches, lighting and plantings to serve as community gathering centers. Recreational facilities within a three mile radius include the playgrounds at Honeydew • Elementary School, Kiwanis Park, Windsor Hills Neighborhood Park, Highlands Neighborhood Park and Community Center, Liberty Community Park, Cedar River Community Park, Gene Coulon Memorial Beach Park, and the proposed Heather Downs. Neighborhood Park. Maplewood Golf course is also near the site. RECOMMENDED MITIGATION MEASURES: B.3.d) The applicant shall, in order to reduce the potential impacts on existing park and recreational facilities, pay a Parks Comprehensive Plan Mitigation Fee in effect at the time of issuance of a Building Permit for each element of the project. If no fee is in • effect at that time, the applicant shall pay an off-site Park Mitigation Fee of $180 per multi-family unit or provide direct improvements to the equivalent of$180.00 per unit as approved by the Parks and Recreation Department according to City standards. { Note to Applicant #15: If the applicant cancels the Building Permit in writing, then the unencumbered portion of the fee plus accrued interest will be refunded to the applicant. B.3.e) The applicant shall, in order to reduce the potential impacts on existing park and recreational facilities, deed an additional right of way, if any, necessary to accommodate a bicycle path on the east side of Duvall Avenue NE. The applicant shall receive a credit toward any parks mitigation fees for the value of the bike path right(s) of way dedicated. The amount of the credit`shall be determined by the Parks Department. B.3.0 The applicant shall, in order to reduce the potential impacts on existing park and • recreational facilities, incorporate a system of pedestrian trails in wetland buffers, portions of wetland buffers, and/or along drainage swales, provided that the trails not infringe on the inner 20 feet of any buffer. Trails should meet the standards of the Parks Department. The location of trails shall be approved by the Planning Section of the Development Services Division and the Parks Department as part of the site plan • approval process and as part of the approval for the Wetland Mitigation Plan. • B.3.g) The applicant shall, in order to improve on site recreational facilities, incorporate congregate areas around mail box centers, including Weather protected seating areas, pedestrian scaled lighting, decorative paving and plantings to serve as community gathering centers. Plans for such centers shall be approved by the Development Services Division in conjunction with site plan review. Policy Nexus: WAC 197-11-660; Environmental Review Ordinance, 4-6; Comprehensive Plan VII.H. and IX.D.; Comprehensive Park and Recreation Plan; Bicycle Trails Master Plan. • e) Utilities The project site presently is not served by water or sewer service. Such services will need to be provided and Sewer Utilities Connection fees will need to be provided. 1) Water The water supply for Renton is provided by an aquifer underlying Northeast Renton. The aquifer provides a reliable water source; water available to the site far • exceeds anticipated use levels. Water mains will need to be extended, as required by • FORREST Cr ESTE MITIGATION DOCUMENT •19• SEPTEMOER 22,1992 1 . , 1 City Code, to provide for domestic water use and to ensure adequate flow (or fire-related emergencies. The applicant could satisfy City requirements by extending a 12 Inch main along Duvall Avenue and developing an 8 inch to 12 inch looped water main for fire flow. Fire flow in the vicinity of the site is estimated at 3,000 gpm which is considered adequate by the Fire Department. • RECOMMENDED MITIGATION MEASURES: B.3.h) No mitigation measures are required to address environmental impacts, as these impacts are addressed by Code requirements. Note to Applicant #16: Special Utilities Connection Charges will be assessed by the Utilities Engineering Division, following finalization of site plan review, in conjunction with issuance of the building permits. 2) Sewer. The proposed Forrest Creste site is not currently served by sanitary sewer lines. It is located in the Heather Downs Drainage Basin an area of East Renton where lines are operating at or near capacity; a moratorium has been declared on the construction of new development in this area until sewer capacity can be provided. • However, Forrest Creste and eight other developments in the area have been authorized by Council as eligible for limited exemption to this moratorium, because development applications were submitted to the City prior to adoption of Resolution No. 2764 which established the moratorium. Two options are available to serve Forrest Creste. If existing remaining sewer capacity is sufficient then the development could connect to the existing system. Or, interim improvements can be made to increase the available • capacity of the sewer system. City Council must authorize any plan for providing temporary sewer service to the site. . • The applicant has elected to request City Council authorization to participate in the interim connection program. This program provides a solution.which entails an interbasin transfer of flows from the Upper Heather Downs basin to the Lower Maplewood basin. To accomplish this transfer, it is necessary to construct a lift station on a parcel to the south of the adjacent Orchards site as well as a force main from this lift station to the intersection of NE 2nd and Monroe Avenue. The improvements will be financed by the developers of Forrest Creste and the developers of other projects (e.g., The Orchards) which will benefit from the improvements. When the East Renton • interceptor (or an alternative permanent service line) is constructed, Forrest Creste would be required to connect to that permanent system.. RECOMMENDED MITIGATION MEASURES: • 8.3.i) No mitigation measures are required in conjunction with environmental review. Note to Applicant #17: In the absence of standard sewer systems, the applicant will be required to participate in the interim program authorized by Council Resolution 2764, or, develop an alternative system for provision of sanitary sewer service in accord with local regulations. I1 • • • FORREST CRESTS MITIGATION DOCUMENT .. SEPTEMOER 22,1002 • • III . DOWNSTREAM ANALYSIS LEVEL ONE • THE LARGER NORTHERLY DRAINAGE BASIN HAS APPROXIMATELY 10 ACRES OF DEVELOPED AREA THAT DRAINS DIRECTLY TO THE SOUTHWEST WETLAND . THE SMALLER SOUTHERLY DRAINAGE BASIN HAS APPROXIMATELY 1 ACRE OF DEVELOPED AREA. THIS BASIN DRAINS SOUTHERLY FOR APPROXIMATELY 300 FEET AND ENTERS A TYPE 2 WETLAND. THIS WETLAND IS. PART OF A LARGER • WETLAND WHICH THE ENTIRE SITE DRAINS TO . RUNOFF FLOWS. FROM THIS WETLAND SOUTHERLY APPROXIMATELY 600 FEET ALONG THE EAST SIDE OF DUVALL AVE NE . THEN RUNOFF CROSSES UNDER DUVALL AVE NE THROUGH A 36" CULVERT AND FLOWS APPROXIMATELY 800 FEET SOUTHERLY AND WESTERLY THROUGH HEAVILY A VEGETATED AREA AND A THE RECENTLY CONSTRUCTED WINDSOR APARTMENT COMPLEX. FROM THERE RUNOFF ENTERS A 24" CULVERT AND FLOWS WESTERLY UNDER THE WINDSOR SITE. RUNOFF CONTINUES FLOWING FOR APPROXIMATELY ANOTHER 400 FEET WESTERLY TO NE 4TH STREET . FROM THERE RUNOFF FLOWS SOUTHERLY UNDER • NE 4TH AND INT AN OPEN AREA, SINGLE 'FAMILY -DETENTION POND AND ON TO MAPLEWOOD CREEK. MAPLEWOOD CREEK I'S IDENTIFIED AS A TYPE 2 STREAM APPROXIMATELY 2 MILES DOWNSTREAM FROM THE SITE . FROM. THAT POINT RUNOFF CONTINUES WITHIN MAPLEWOOD CREEK FOR APPROXIMATELY ANOTHER • 400 FEET TO THE CEDAR RIVER AND ON TO LAKE WASHINGTON . 1 IA IV . RETENTION/DETENTION ANALYSIS AND DESIGN • THIS SITE HAS BEEN DESIGNED USING THE 1990 KING COUNTY DRAINAGE MANUAL & THE CITY OF RENTON ' S WETLAND, BUILDING, AQUIFER AND DRAINAGE CODES . RUNOFF IS ROUTED THROUGH TWO SEPARATE DETENTION SYSTEMS AND BID-FILTER SWALES PRIOR TO ENTERING THE WETLAND OR DOWNSTREAM CORRIDOR. THE_ DETENTION SYSTEMS HAVE BEEN DESIGNED TO RELEASE RUNOFF AT THE PRE-EXISTING CONDITION UP TO AND INCLUDING THE 100 YEAR EVENT . THIS HAS BEEN DONE, PER THE CITY OF RENTON ' S REQUEST, TO PRECLUDE ANY RECONSTRUCTION OR UPGRADING OF THE DOWN STREAM SYSTEM. • RUNOFF WILL BE DETAINED IN TWO SEPARATE BELOW GROUND VAULT SYSTEMS . THIS WAS ALLOWED BECAUSE THE DOWN STREAM SYSTEMS , WITHIN ONE MILE, ARE NEITHER TYPE 1 WETLANDS NOR TYPE 1 OR 2 STREAMS . RUNOFF 'EXITING THE DETENTION SYSTEMS WILL FLOW THROUGH BIO-FILTER SWALES . THESE SWALES HAVE BEEN DESIGNED FOR MAXIMUM FILTRATION DURING THE 2 YEAR EVENT AND CONVEYANCE OF THE 100 YEAR EVENT. ONCE RUNOFF LEAVES THE SWALES FLOW WILL ENTER EITHER A FLOW SPREADER OR LEVEL SPREADER. THE TWO OFF-SITE CONTRIBUTING AREAS WILL BE ROUTED THROUGH THE SITE VIA PIPE OR OPEN DITCH . BOTH OF THESE AREAS WILL BYPASS DETENTION AND FLOW DIRECTLY TO THE WETLAND AREA. THE NORTHWESTERLY AREA WILL BE ROUTED THROUGH THE NEW STREET FRONTAGE IMPROVEMENTS . ' I •r KING COUNTY, WASI-iINGTON, SURFACE WATER DESIGN MANUAL RETENTION/DETENTION SUMMARY SHEET Development OCT r-�AS'T'' G2��-N'� Date Location E {--A, S i Dr � nUvAlk, l harc71,l S3.0y4 °I.':• ENGINEER DEVELOPER Name PA L Of 1 h-t Name 214 / !.A( IJA-71( Firm QAGYPiL I✓r11n I rr Or-Slc,n ' Nt(, Firm Address 1 O AOOW(Z, P)L r 3C0 Address j I G7,1 S.r 4-1Th Pt.( Srnr7rz�z +..X cftiSC' r`.t,u \A , k . �SraoG Phone 43)--7170 Phone 74( -2556 • Developed Site acres Number of Lots � • Number of Detention Facilities On Site 2- • Detention provided in regional facility n Regional Facility location n . • No detention required ri Acceptable receiving.waters • Downstream Drainage Basins Immediate Major Basin • Basin A /kp..r.: jocfvo L. 1-41.-S]-r / Gr-•07t-r2 (2. yr Basin B Basin C Basin D • TOTAL INDIVIDUAL BASIN Drainage Basin(s) A B C D Onsite Area 10 QC 1 AC Offsite Area Type of Storage Facility Live Storage Volume 3Z,533 4,G-S Predeveloped Runoff Rate 2year •C6 crz5 ,06" cr-S 10year 1.22 Postdeveloped Runoff Rate 100 year 5.3) 1, 27 11 2 year :3q 10year S•n " .C6 Developed Q 100 year C5.44 a ,qs Type of Restriction p2,Ir`,cr . 0(2,1r1 Cr;, Size of Orifice/Restriction Orifice/Restriction No.1 3.94- I :'L No.2 4.012, '' No.3 C. 11 1.30 ti No.4 No.5 DEPARTMENT OF THE ARMY WASHINGTON-KING CO. 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'\' \'r. \ .� -,"�"'`','., t '•�, 1 .- 11 • R�I��Y IIl' lt'.\ • ,,,•.� al, \\\_\'v"�1 'r 11'• ,'a::. ,. , • 1\!„ �.� ,., �l • ,i•.: - , y I ter. l ' • ,:rorkr \ \ .`\ .-"•'r_ _r • .•111'\\1 , '`I'S, Ir\` ' J'. ,.f!�J ,i 1 1/2 0 1 The boundaries of the sensitive areas dis- One- hundred-year floodplalns 1 `1 I I played on these ,naps are approxIolale. Yond those shown on maps. �— I • Additional sensitive areas that have not suranco Rate Maps do not alwaY been mapped may be present Oil adevcl- floodplaln to the headwaters o' .�•.. MILE N opment proposal site. whore differences occur between what Is Illustrated on these maps and the site conditions, the actual pre• - •"•:i'1`•••. sauce or absence on the site of the sensitive •Immeimmim Class 1 Issaquah area - as defined In the Se.nslllve /\rea 1 Ordinance-Is the lugal control. •—+-i=i-a Class 2(with siilmonids) .4 ypp.yaar Floodplalns Class 2(perennial;salmonid ill f • • use undetermined) Fl 9' • • s •'• • Class 3 r1 MIEN 1 _ _ Unclassified d e . . ( 1--D,ACIFIC . 1 ENGIINEERING Joe r_0(2,rss--T- COMPAINIY . • . . , • I MEET NO. OF CIVIL ENGINEERING AND rs, PLANNING CONSULTANTS CALCULNED BY -IL( t DArE oci- I, i i 1 1 1 . . i 1.... 1 1 •i .. ''1 I r • I c hi 1 1 ck- )-7 1 ' T .1 I , . r i 1 , •'''''''''""''''''— , i . I 1 , 1 i - : 1. . - .i I • . , . . , • . .i i , . .• ... 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I 1 1 . . . 130 Andover Park East Seattle.Washington 9A1FiA 9r1A/c11.1_707n KING COUNTY, WASHINGTON,' SURFAGE WATER DESIGN MANUAL 1: FIGURE 3.5.1C 2-YEAR 24-I1OUR ISOPLUVIALS ' ' ' t--- - — yia ,+— = er•— — — . ._ 'l� �� _ A (\\COY IA �� _.- % . 4 ligdi-Jr U., :,...- q -44 V -_ • • ' . r. � . N1/4.‘, . A , ./fro , 1.. 411111a _ 4.4 i ,I114 10 '.• io,r, Igo :_. i A ,,,,o i, ,,,__. , \ 1 NSv) i • . . -. . . . . /.! . / .7.7....i. itilirr, ,0 ,A•olui.,:, # 1; 01 4 .i. 2:Cil itAir: o',..:-.:` :„.;1;1:, oak ._. \ c ..,., ' A.'‘ , 1 . ';:t cb i ...-- , \ . ,b, iv ; )4401 ..„,irm • _ , trig .... . , :-.1E . Agit. wygi_k i. ik .: 'lifilA .. ,cv-c':'-` . . .) - • '-'4.- • leilig• - --: "I= kjrff f Ah-- s ' f ... ,,,. ' 1 ' IA -r ''' . °°'°1/1 dr' . .N';.,.). hr likk,iaz.k'. -t—.li-4i)r-i-.)_hi/-, ;-.:1--:0..1 4--v• -i1 o.1ffi.I,.N.n. 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''''I A a. VIL. "7' . - \ III -- -''''- '4't %v1,1,:* C'' r 4..14 . i'1. I '� (iit r�W��1.14.4 - age. 16- 1.,• NtoN i • 0. fi • . 11,1V .i) 114 lki ) . ' itb,' ' faS4•1 -02394 , /--/ 7..41kkil . 14 its:__ . fikit\ litv . -A9r„,i-iirio- p„..i. , _ , I ._., ik„ 4‘ ., _ ... - a " ' - 1 5 l% °A11414' - ' ANlitt, *% \440- 41371. • ' ' ii pArt WA 10101; t" ,. UN \ tv„ ; ,. 11141"- eNtila *1". - --- ,*k t-,, '7` ,. ri __. \ : ! 1 i.. -I. %---1 i4 Oweivre, •--- Q,,... Ilk\ ', ,.- ii.- ___, -: . i i -: EL, - . ,i. , I di W Mg - 4 IV% 4 -----/*--- il ' 1111114 4- %:,. 1 I IN( NEI ' . - • 1,45 1 i / taiiiTsibm° � ` .Ht .� , ar 1ill if "ii.-fe Wit.milf iii inefigirgelni h Wie .-‘ ,... II - .0 i .... r. filielifibteti ., O. lig _ , ma111-__6' l NI 1 icir h*ki 14,ll tillr.A1 4107,11 .•N. s / \I-7\7— . .-1,Fq ,..... „_, ,a. _� , , f ,. _ , . • -,i ., i., , i.,: I \ #4j1( — — � ` `�V , . __ D YEAR 24-HOUR PRECIPITATION 10. 1�A� • . 6.6_. .4----ISOPLUVIALS OF 100-YEAR 24HOUR ot.• ry � !` ,- 5,r, ' • TOTAL PRECIPITATION IN INCHES , , �• . / - 0 1 2 3 4 5 6 7 0 Mllos A(,�. ' ��' -, , 3.5.1-13 43O ., ' — v _ ' 1:300,000 , „el� • rU/ f.)/.)._ I-'-::Ec i I- ic L:n'j i nc.aer .i n':) Company pa';Jsi. I 'FORREST CRESTE • '9074 ~�------ ,-- _. r BASIN SUMMARY "..__..,___. .__• � BASIN ID : A10 NAME : DEVELOPED 10 YR SBUH METHODOLOGY I1; i 'L AREA .78 Acres BASEFLOWS : 0 .00 cfs RAINFALL TYPE : USER' PERVIOUS.,. AREA PRECIPITATION : 2 .95 inches AREA . . : 4 .86 Acres TIME INTERVAL : 10 .00 min CN . . . . : 86 .00 TIME OF CONC 5 .00 min IMPERVIOUS AREA • ABSTRACTION COEFF : 0 .20 AREA . . : 4 .92 Acres CN . . . . : 98 .00 PEAK RATE: 5 .83 cfs VOL: 1 .77 Ac-ft TIME : 470 min • • BASIN ID: A100 NAME: DEVELOPED 100 YR SBUH METHODOLOGY TOTAL AREA : 9 .78 Acres BASEFLOWS : 0 .00 cfs RAINFALL TYPE : USER1 PERVIOUS AREA PRECIPITATION : 3 .95 inches AREA . . : 4 .86 Acres II TIME INTERVAL . . . . . 10 .00 min CN . . . . : 86 .00 TIME OF CONC 5 .00 min IMPERVIOUS AREA ABSTRACTION COEFF : 0 .20 AREA . . : 4 .92 Acres CN . . . . • 98..00 PEAK RATE : 8 .44 cfs VOL: 2 .54 Ac-ft TIME : 470 min • I BASIN ID: A2 NAME : DEVELOPED 2 YR SBUH METHODOLOGY TOTAL AREA 9 .78 Acres BASEFLOWS: 0 .00 cfs RAINFALL TYPE : USER1 PERVIOUS AREA PRECIPITATION : 2 .00 inches AREA . . : 4 .86 Acres TIME INTERVAL : 10 .00 min ON . . . . : 86 .00 TIME OF CONC • 5 .00 min IMPERVIOUS AREA ABSTRACTION COEFF : 0 .20 AREA . . : 4 .92 Acres • CN . . . . 98 .00 PEAK RATE: 3 .44 cfs VOL: 1 .07 Ac-ft TIME : 470 min • • • • • 10/ 6/92 • Pacific Engineering Company pa' 2 FORRE_ST CRESTE 9074 . • :i BASIN SUMMARY BASIN ID: a1O NAME : EXISTING 10 YR '.:,OU i vIETWJDOLOGY TOTAL AREA 9 . 78 Acres BASEFLOWS : 0 .00 cfs RAINFALL TYPE : USER1 PERVIOUS AREA I. PRECIPITATION . . : : 2 .95 inches AREA . . : 9 .78 Acres , TIME INTERVAL : 10 .00 min ON . . . . : 81 .00 TIME OF CONC 32 .23 min IMPERVIOUS AREA • ABSTRACTION COEFF : 0 .20 AREA . . : 0 .00 Acres ON . . . . : 98 .00 TcReach - Sheet L : 300 .00 ns : 0 .2400 p2yr : 2 .00 s : 0 .0800 ck ac n - �h:i l •w L : 370 .00 ks : 3 .00 s0 .0800 PEAK RATE : 1 .82 cfs VOL : 1 .04 Ac-ft TIME : 480 min r. BASIN ID : a100 NAME : EXISTING 100 YR • SBUH METHODOLOGY TOTAL AREA 9 .78 Acres BASEFLOWS : 0 .00 cfs RAINFALL TYPE : USER1 PERVIOUS AREA 11 PRECIPITATION : 3 .95 inches AREA . . 9 .78 Acres j TIME INTERVAL : 10 .00 min ON . . . . : 81 .00 it TIME OF CONC : 32 .23 min • IMPERVIOUS AREA 1 ABSTRACTION. COEFF: 0 .20 AREA . . : 0-.00 Acres • ON . . . . 98 .00 TcReach - Sheet L: 300 .00 ns :0 .2400 p2yr : 2 .00 s : 0 .0800 TcReach - Shallow L : 370 .00 ks :3 .00 s:0 .0800 PEAK RATE : 3 .31 cfs VOL: 1 .69 Ac-ft TIME : 480 min +, BASIN ID : a2 NAME : EXISTING 2 YR I SBUH METHODOLOGY • I TOTAL AREA : 9 .78 Acres BASEFLOWS: 0 .00 cfs jI RAINFALL TYPE : USER1 PERVIOUS AREA PRECIPITATION : 2 .00 inches AREA . . : 9 .78 Acres �i TIME INTERVAL : 10 .00 min ON . . . . : 81 .00 TIME OF CONC 32 .23 min IMPERVIOUS AREA ABSTRACTION COEFF : 0 .20 AREA . . : 0 .00 Acres ON . . . . : 98 .00 ;( I, TcReach - Sheet L : 300 .00 ns :0 .2400 p2yr : 2 .00 s :0 .0800 .[ TcReach - Shallow L: 370 .00 ks:3 .00 s:0 .0800 f PEAK RATE : 0 .66 cfs VOL: 0 .49 Ac-ft TIME : 490 min I. I E I' � ' O/ 6/92 Pacific Engyneering Company page � ` FORREST CRESTE ^ 9074 ' --_-_- _ __------ _ -_-_-_ HYDROGRAPH SUMMARY � � PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area cfo min . cf-AcFt Acres 1 0 .660 490 21462 of 9 '78 V 2 1 '820 480 4S270 cf 9 '78 3 3 '314 480 73826of 9 .78 � 3 '441 470 46667 cf 9 .78 ' 5 6 .828 470 77126 cf 9 '78 6 8 '44S 470 110476 cf 9 '78 ll 0 '660 770 46667 cf 9 '78 12 1 '821 530 77126 cf 9 '78 13 3 '314 51O 110476 cf 9 `78 � f � ' ' � ` .! ` \\ , , || " J ]| | ' | ;r 1 / �| / | !� ! / ' . � : ` ' � | �. � i | ^ • 10/ 6/'92 Pacific Enginew•ring Company page 4 ;. FORREST CRESTE 9074 STORAGE STRUCTURE LIST RECTANGULAR VAULT ID No . V1 L e crip lion: VAULT Length : 130 .00 ft . Width : 35 .00 ft . • • • • • • • t• ,FI it • f0/ 6/92 ' Pacific Engineering Company page 5 FORREST CRESTE 9074 DISCHARGE STRUCTURE LIST MULTIPLE ORIFICE ID No . 01 ueecription : ORIFICE • Outlet Elev : 400 .00 Elev : 398 .00 ft Orifice Diameter : 3 .8438 in . . Elev : 402 .80 ft Orifice 2 Diameter : 5 .9180 in . Elev: 404 .10 ft Orifice 3 Diameter : 5 . 1094 in . • • • 1 10/ 6/92 Pacific Engineering Company page C FORREST CRESTE 9074. • LEVEL POOL TABLE SUMMARY MATCH INFLOW ST DI <-PEAK-> STORAGE < --- -------DESCRIPT:CON.-----------> ( cfs ) ( cfs ) id id <-STAGE> id VOL ( c ) 2 YR EX - 2 YR DEV 0 .66 3 .44 V1 01 402 .71 11 123 .90 10YR EX - 10YR DEV 1 .82 5 .83 V1 01 403 .96 12 180 .83 100YREX - 100YR DEV 3 .31 8 .44 V1 01 405 .4 6 13 248 .33 • • • • 10/ 6/92 Pacific Engineering Company page 7 • FORREST CRESTE 9074 REACH SUMMARY DITCH REACH ID No . 810 Dicch Length : 200 .00 ft Ditch Width : 1 .00 ft Side Slopel : 3 .00 Ditch Slope : 0 .0200 ft/ft Side 51ope2 : 3 .00 Contrib 'Bas : • Mannings n : 0 .3500 Dn Invert 0 .00 ft Dn W .S . Elev:0 ..0000 Num Steps : 10 Trib Area: • 9 .78 Ac . Design Flow : 0 .60 cfs F . Depth 0 .65 ft Vel 0 .31 fps • t Upstream W .S . Elev : 0 .00 ft . DITCH REACH ID No . BIOFULL Ditch Length : 200 .00 ft Ditch Width : 1 .20 ft Side Slopel : 3 .00 Ditch Slope: 0 .0200 ft/ft Side Slope2 : 3 .00 Contrib Bas : Mannings n :0 .0300 Dn Invert 0 .00 ft Dn W .S . Elev :0 .0000 Num Steps : 10 Trib Area : 9 . 78 Ac . Design Flow . 7 .98 cfs Depth •: 0 .66 ft Vel - 3 .77 fps Upstream W .S . Elev : 0 .00 ft . • i • • lI } ill; PACIFIC ( CANOINEERINOJOB cy �2r's-rr • qn7¢ COMPANY !SHEET NO I OF ' - CIVIL ENGINEERING AND PLANNING CONSULTANTS CALCULATED BY pig Oar Ca 9 Z i j ; i I• ! i f j j j i 1 1 ! I ii I I IIL1J I I I ! + I i • ................... : I 1 ! I I • - i .. I • , h i ............. ..............1 _.. J 1' M11 .........._........................... .1........... ' ! In LLL...... Lil u q Ni 00 E..._.._......._._....__._......�_'T . .� Y...� ate........ ( �_ _ - _` 9 `', i ,- - 1 - I �................ fr1. ....._.� �....._.. _ . ...._..N 1 C7 j x... rn I � II i i I h . I i • 1 \' OF + I i ! ; i.. 1 Ii I. \( i I . I llll III liiI I � I 130 Andover Paris East Seattle,Washington 98188 206/431-7970 Fax/431-7975 I ii ! 0/ /'l ' Pac 1. r.l c Engineering Company • page 1 FORREST CRESTE - SOUTH BASIN 9074 BASIN SUMMARY BASIN ID: A10 NAME : DEVELOPED 10 YR - SOUTH BASIN SBUH METHODOLOGY TOTAL AREA 1 .08 Acres BASEFLOWS : 0 .00 cfs RAINFALL TYPE : USER1 - -PERVIOUS AREA PRECIPITATION : 2 .95 inches AREA . . : 0 .50 Acres TIME INTERVAL : 10 .00 min CN . . . . : - 86 .00 TIME OF CONC 5 .00 min IMPERVIOUS AREA ABSTRACTION COEFF : 0 .20 AREA . . : 0 .58 Acres CN , . . , 98 .00 PEAK RATE : 0 .66 cfs VOL : 0 .20 Ac-ft TIME : 470 min BASIN ID : A100 NAME : DEVELOPED 100 YR - SOUTH BASIN ' SBUH METHODOLOGY TOTAL AREA 1 .08 Acres BASEFLOWS: 0 .00 cfs ' 1 RAINFALL TYPE . . . . : USER1 PERVIOUS AREA II PRECIPITATION . . . . 3 .95 inches AREA . . : 0 .50 Acres TIME INTERVAL . , . . 10 .00 min CN . . . . 86 .00 TIME OF CONC : 5 .00 min IMPERVIOUS AREA ABSTRACTION COEFF : 0 .20 AREA . . : 0 .58 Acres CN . . . . : 9800 PEAK RATE : 0 .95 cfs VOL: 0 .28 Ac-ft TIME: 470 min BASIN ID : A2 NAME: DEVELOPED 2 YR - SOUTH BASIN I SBUH METHODOLOGY TOTAL AREA . 1 .08 Acres BASEFLOWS: 0 .00 cfs RAINFALL TYPE : USER1 PERVIOUS AREA PRECIPITATION : 2 .00 inches AREA . . : 0 .50 Acres tl TIME INTERVAL : 10 .00 min CN . . . . : 86 .00 TIME OF CONC : 5 .00 min IMPERVIOUS AREA ABSTRACTION COEFF : 0 .20 AREA . . : 0 .58 Acres . CN . . . , : 98 .00 • PEAK RATE : 0 .39 cfs VOL : 0 . 12 Ac-ft TIME: 470 min • it 10/ 6/92 Pacific Engineering Company page 2 FORREST CRESTE - SOUTH BASIN 9074 . . , BASIN SUMMARY BASIN ID : a10 NAME : EXISTING 10 YR - SOUTH BASIN SBUH METHODOLOGY TOTAL AREA 1 .08- Acres BASEFLOWS: 0 .00 cfs RAINFALL TYPE : USER1 PERVIOUS AREA PRECIPITATION : 2 .95 inches AREA . . : 1 .08 Acres TIME INTERVAL : 10 .00 min CN . . . . : 81 .00 TIME OF CONC 61 .42 min IMPERVIOUS AREA • ABSTRACTION COEFF : 0 .20 AREA . . : 0 .00 Acres CN . . . . 98 .00 TcReach - Sheet L : 310 .00 ns : 0 .8000 p2yr : 2 .00 s :0 . 1000 • PEAK RATE : 0 . 15 cfs VOL : 0 . 11 Ac-tt TIME : 490 min BASIN ID: a100 NAME : -EXISTING 100YR - SOUTH BASIN. SBUH METHODOLOGY TOTAL AREA 1 .08 Acres BASEFLOWS: 0 .00 cfs .+ RAINFALL TYPE : USER1 PERVIOUS AREA PRECIPITATION 3 .94 inches AREA . . : 1 .08 Acres TIME INTERVAL : 10 .00 min CN . . . . : 81 .00 TIME OF CONC 61 .42 min IMPERVIOUS AREA ABSTRACTION COEFF: 0 .20 AREA . . : 000 Acres CN . . . . 98 .00 TcReach - Sheet L : 310 .00 ns :0 .8000 p2yr : 2 .00 s :0 . 1000 l� PEAK RATE: 0 .27 cfs VOL : 0 .19 Ac-ft TIME : 490 min BASIN ID : a2 NAME: EXISTING 2YR - SOUTH BASIN SBUH METHODOLOGY TOTAL AREA : 1 .08 Acres BASEFLOWS: 0 .00 cfs if RAINFALL TYPE : • USER1 PERVIOUS AREA PRECIPITATION : 2 .00 inches AREA . . : 1 .08 Acres TIME INTERVAL : 10 .00 min CN . . . . : 81 .00 TIME OF CONC 61 .42 min IMPERVIOUS AREA `p ABSTRACTION COEFF : 0 .20 AREA . . : 0 .00 Acres CN . . . . 98 .00 . TcReach - Sheet L: 310 .00 ns :0 .8000 p2yr : 2 .00 s :0 . 1000 PEAK RATE : 0 .05 cfs VOL : 0 .05 Ac-ft TIME : 520 min • 10/ 6/92 Pacific Engineering Company page 3 FORREST CRESTE - SOUTH BASIN 9074 ---------_------ -- HYDROGRAPt-i SUMMARY ------•----_---- .• +�_� • PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area cfs min . cf-AcFt Acres 1 0 .053 520 2370 cf 1 .08 2 0 . 148 490 4999 cf 1 .08 3 0 .270 490 8120 cf 1 .08 4 0 .391 470 5277 cf 1 .08 5 0 .656 470 8663 cf 1 .08 6 0 .945 470 12361 cf 1 .08 11 0 .053 1010 5274 cf 1 .08 12 0 .148 550 8658 cf 1 .08 13 0 .270 540 12355 cf 1 .08 15 0 .053 540 2370 cf 1 .08 16 0 .053 540 2365 cf 1 .08 17 0 .053 520 2370 cf 1 .08 • 1 I 10/ 6/92 Pacific Engineering Company page 4 FORREST CRESTE - SOUTH BASIN 9074 STORAGE STRUCTURE LIST RECTANGULAR VAULT ID No . V2 Description: SOUTH VAULT Length : 130 .00 ft . Width: 10 .00 ft . . 9 i is 10/ 6/92 Pacific Engineering Company • page 5 • FORREST CRESTE - SOUTH BASIN 9074 • DISCHARGE STRUCTURE LIST MULTIPLE ORIFICE ID No . 02 Description : SOUTH ORIFICE Outlet Elev: 410 .00 Elev : 408 .00 ft Orifice Diameter : ' 1 .2451 in . Elev : 411 .70 ft Orifice 2 Diameter : 2 .4199 in . Elev : 412 .10 ft Orifice 3 Diameter : 1 .3008 in . 2 10/ 6/92 Pacific Engineering Company page 6 FORREST CRESTE - SOUTH BASIN 9074 LEVEL POOL TABLE SUMMARY • MATCH INFLOW ST DI ( -PEAK-) STORAGE <•- DESCRIPTION > ( cfs ) ( cfs ) id id <-STAGE> id VOL ( cf ) • EX 2YR - DEV 2 YR 0 .05 0 .39 V2 02 411 .61 11 20 .54 EX 10YR - DEV 10 YR 0 . 15 0 .66 V2 02 412 .01 12 26 • .66 EX100YR - DEV100YR 0 .27 0 .9S V2 02 412 .75 13 35 .65 5 5 • 4 • 10/ 6/92 Pacific Engineering Company page 7 FORREST CRESTE - SOUTH BASIN 9074 • REACH SUMMARY • DITCH REACH ID No . 8 IO2 Ditch Length : 200 .00 ft Ditch Width : 1 .00 ft Side Slopel : 3 .00 Ditch Slope : 0 .0200 ft/ft Side Slope2 : 3 .00 'Contrib .Bas: Mannings n :0 .3500 Dn Invert 0 .00 ft Dn W .S . Elev: 0 .0000 Num Steps : 10 Trib Area : 1 .08 Ac . Design Flow : 0 .05 cfs Depth 0 .20 ft. Vel 0 . 16 fps Upstream W .S . Elev : 0 .00 ft . DITCH REACH ID No . BIO2A Ditch Length : 180 .00 ft Ditch Width : 1 .00 ft Side Slopel : 3 .00 Ditch Slope: 0 .0200 ft/ft • Side Slope2 : 3 .00 Contrib Bas : Mannings n : 0 .3500 Dn Invert 0 .00 ft Dn W .S . Elev:0 .0000 Num Steps : 10 • Trib Area: 1 .08 Ac . Design Flow : 0 .05 cfs Depth : 0 .20 ft Vel 0 . 16 fps Upstream W .S . Elev : 0 .00 ft . DITCH REACH ID No . BIO2FULL Ditch Length: 180 .00 ft Ditch Width: 1 .00 ft Side Slopel : 3 .00 Ditch Slope: 0 .0200 ft/ft Side Slope2 : 3 .00 Contrib Bas: Mannings n :0 .0300 Dn Invert 0 .00 ft Dn W .S . Elev : 0 .0000 Num Steps : 10 Trib Area : 1 .08 Ac . Design Flow : 0 .89 cfs V Depth 0 .24 ft Vel : 2 .12 fps • Upstream W .S . Elev : 0 .00 ft . • • ( PACIFIC I• - NCIINEERING Joe rz an-rzirz S T Go-rz-..'STfi_ • 74 COMPANY .., !SHEET NO. i OF CIVIL MINGINIIIIIRING AND PLANNING CONSULTANTIO CALCULATED BY R-01 oAre OC7r 4. I 1 1 i i I i 1 i i I :----i) i --z 1 I ' I• g . . . - 1 t1 r - : I . .. =5 1 ; . • • d.../ c:: , .. - 1 -,,- -,- ' . - . ...I \ 0- .i Z.-.) • a .. , - • N)L ...,1 i ..._ , , . .;i ..._7/ ..st y , Q) u- 0 ___,_ -...._ ....., ,.,/, 14 r 1 •-•—• \IN . -4 --.:-... '1 1 --vr) 0 -/ -- .- r.1 'Ekb 0 — ....1 1 • .71 .---..-- ........-.. ............................................-.............._.. .......................-......... ........ 111 i 1 i \ I i ... ... i i . " ....4., ,..--. I , • , t If p" 5, -I , 8 i , I. [ 1 1 . , .1 1\ 1 I 130 Andover Park East Seattle,Washlnaton 98188 206/431-797o Pm,bt 11-707c • V . CONVEYANCE SYSTEM ANALYSIS AND DESIGN • I6 ' gR . 3 { iFgF . ti ' i VI . SPECIAL REPORTS AND STUDIES N/A • jl 1. • • • 1,1 • • • • VII . BASIN AND COMMUNITY PLAN AREA N/A • • " a 1I i • t f • • VIII . OTHER PERMITS • • • • • • • 1 r . p • IX. EROSION/SEDIMENTATION CONTROL DESIGN • 1 1I • . r ti h • SHEET NO. 11 • A KING COUNTY AREA, WASHINGTON • (RENTON QUADRANGLE) 10' 1 680 000 FEET 1122°07'30" \UAkF (Joins sheet 5) Amc ISSAQUAH 12 Ml. _ :Jl:. 47`30' • \\ . •, '_ Y:11 . ill, :I r -• ;f, ,� I _/.-,. • - AgD;'' ..... ..a `\\ . .11 w-r :•51•:•, � u :- .iAmC 7.-L- i 5S k �' i :�.,. ,-: - . ■..• - ' . • • 'lt. \\'**Mil$�gh�asal0.• -j ►c `•.( Z t '.•';'• - gc• moo • • • • \ `�ti •, y^ •9 I, - -a•413• -AgC, 11 :• •I?t;n•915 • L . li. 11 ‘ 1 __. ..... •11%,,io,„ i . . 1...... __ __ _ :...:, ;.• .... .,. r_ii.:.,,;..<„,,...„,„..„, • • '■�j• ��r [`�\O ;�_-'j•.`• '� •Trailgr4 II • '• `G .EvB :i• . • • .`: 8La M Q- 1 • �ei arki. :` '•., ii 2 n .B ngM I :It • . - / . /n u r. 1 P ■ p •I 3 °424 . ® • .—a6116 •I• I I Greenwood C> r ���• � • '• — 180 000 ;i •r .a� FEET .AkF, - r'. = ;�'-' .i8 • l • I a. ,. 406`. : • / • ilifeicePj1„.1,1 EvC p'• . An 9 i {GRAVEL 'PIT 41�� •'- Pc BM `� C o i ��" • AgC • • .' z. 4 --k -{:P32L . aa, p ; .6._ I rt. \ •15'• 14 „ ... ��t" 'AkF •• ..Ir"F ;, n ® • I„ , — -"^ 1 • 1. • •?;',..:'?,.... AkF ' '1 ''. I ---il - --- • A C`• t/ •`a _ AkF. 1 �..,.'=.w"4 / - I • . BM . �� 1111, `` I' r • . EvB . • ' . l ,IL ' -IrE ' *37 FRIvs,' / _NPwo,. s -- _ • I • Ci . T -\ Ak • 'P o\ • � \ , AkF I• ` .. J - q•: •I ' it t"""% �L r� /. DO/.�j9 Ma ` it .<<.;# .....,*:‘,..,... a�- __ yy• /. �� �; �i • AgD : s'iPs •‘'. .' 46,79.%:.. Substa.^.'nCr \ i•,` `T` ` �: a. �/ o� 4�1� w 'C -- \.I// •✓.I AkF_�7 _-_.` : 1 $p`' •C 1 'iii I- 1��_ / •_�a�s ., l0 lB M ... . 21 L.`, s•-•, • • •`NA• • `,+ �` 'V E{hOt ���.�� W 455 � y. ▪ 1.1 ___ . i - • ' hgC `•''.:...,_ .'AkF' \ r. • �I I � f �� .• I,.;:. �� �11,:,\;:i:AkF .::';-.:' .• I / / ✓ ':.; \ u ▪ I AgC u' Park,,. PY • O : - QU \ 1 r /r A Er. \fyo `` AgC X. BOND QUANTITIES WORK SHEET • • • 1 King County i Building and Land Development Division BOND QUANTITIES WORKSHEET COMMERCIAL/MULTIFAMILY GROUP , Page 1 of 2 i - Date: I BALD Project No.: 1 Project Name: Site Address: Fill in those items which pertain to this project and return to the Commercial/Multifamily Group - Site Development Review Unit. PUBLIC ROADWAY,.IMPROVEMENTS PRIVATE ON-SITE IMPROVEMENTS Unit Price Unit Quantity Price Quantity Price A.C.Pavement $ 8.00 SY $ $ Cement Conc. Curb & Gutter . . , 9.00 LF $ $ Extruded Asphalt Curb 2.50 LF S $ Concrete Sidewalk 9.00 LF $ $ 6" pipe 7.50 LF $ $ 8" pipe10.00 LF $ $ 12" pipe 15.00 LF $ $ II 15" pipe 16.00 LF $ 18" pipe . . . . . . . , . . . _ 20.00 LF $ $ 24" pipe 26.00 LF $ $ I 36" pipe 30.00 LF $ $ 48" pipe 50.00 LF $ $ '' 60" pipe 65.00 LF $ $ f 72" pipe ' 80.00 . LF. $ $ I Curb Inlet 500.00 EA. $ $ CB TYPE I & I-L 750.00 EA. S $ CB TYPE II - 48" 1400.00 EA. $ $ ' CB TYPE II - 54" 2100.00 EA. $ $ CB TYPE II - 72" 3400.00 EA. $ $ CB TYPE II - 96" • 4000.00 EA. $ $ Restrictor/Separator 12" . . . . 450.00 EA. S $ Restrictor/Separator 15" . . . , 500.00 EA. $ $ Restrictor/Separator 18" . . . . 600.00 EA. $ " S Restrictor/Separator 24" . . . . 750.00 EA. $ $ " Fencing (around pond) . . , . , 10.00 LF $ $ ;' Riprap 30.00 CY $ $ 11 Rockery, Gabion & ecology wall . 7.00 SF $ S I Concrete Retaining Wall . . . . 8.00 SF $ Excavation for Pond 5.00 CY $ $ Infiltration Trench 15.00 LF $ $ k Flow Spreader 15.00 LF $ $ f Trench Drain 15.00 LF $ $ ii Trash Rack 100.00 EA. ' $ $ i'. Detention Pipe Riser 400.00 EA. $ $ $ ' $ I S $ $ $ • SUBTOTAL : $ SUBTOTAL : $ 1/90 I BOND QUANTITIES WORKSHEET King County Building and Land Development Division Commercial/Multifamily Group page 2 of 2 EROSION/SEDIMENTATION CONTROL FACILITIES Unit Price Unit Quantity Price Silt Fence S 3.00 LF $ Seeding/Mulch 3000.00 ACRE S • Temporary Pond 5.00 CY S Standpipe 200.00 EA. S CB Interim Protection 25.00 EA. S Quarry Spall/Rip-rap 30.00 CY S Rock Construction Entrance . . . 300.00 EA. S Pipe ( inch dia.) LF S S . . . SUBTOTAL : $ 1 1 Signature: I Telephone No.: • Firm Name: I I • The following information will be completed bythe KingCountySite Development �P Review Unit. PUBLIC ROADWAY IMPROVEMENTS: S PRIVATE ON-SITE IMPROVEMENTS: S k EROSION/SEDIMENTATION CONTROL : S SUBTOTAL S 20X CONTINGENCY :• S 1 � I TOTAL BOND AMOUNT : $ I I 1 1 RIGHT-OF-WAY BOND : S #8:BONDSHEE.WPF 11/25/1989 1/90 • XI . MAINTENANCE AND OPERATION MANUAL • MAINTENANCE REQUIREMENTS FOR DRAINAGE FACILITIES PICK UP TRASH AND DEBRIS AROUND PROPERTY ON A DAILY BASIS . ANY VEGETATION WHICH MAY BE POISONOUS INCLUDING BUT NOT LIMITED TO: TANSY RAGWORT, POISON OAK, STINGING NETTLES OR DEVILS CLUB SHOULD BE REMOVED IMMEDIATELY. (COORDINATE REMOVAL WITH SEATTLE/KING COUNTY HEALTH DEPARTMENT) . ANY ITEMS SUCH AS OIL, GASOLINE, • ETC. , SHOULD BE REMOVED IMMEDIATELY AS NOT TO HARM PLANTS, ANIMALS OR CAUSE POTENTIAL FIRE HAZARDS . (COORDINATE REMOVAL WITH SEATTLE/KING COUNTY . HEALTH DEPARTMENT) . . . GRASS SHOULD BE MAINTAINED AS NEEDED, NEVER EXCEEDING. 18 INCHES IN .HEIGHT, THEN MOWED TO 2 INCHES. OTHER LANDSCAPE AREAS SHOULD BE KEPT UP ACCORDINGLY AS-NOT TO CAUSE INTERFERENCE TO THE COMPLEX. ANY RODENT DAMAGE TO DAM OR BERM SHALL. BE REPAIRED IMMEDIATELY AND RODENTS DESTROYED. (COORDINATE WITH SEATTLE/KING COUNTY HEALTH DEPARTMENT) . • INSECTS SUCH AS WASPS AND HORNETS SHALL BE DESTROYED OR REMOVED IMMEDIATELY. REMOVE TREES CAUSING INTERFERENCE WITH • MAINTENANCE OR COMPLEX • ACCESS. • •i ANY POND SIDE SLOPES WITH EROSION OVER 2 INCHES DEEP SHALL • IMMEDIATELY BE STABILIZED . WHEN ACCUMULATED SEDIMENT EXCEEDS 10% OF THE POND DEPTH THE POND SHALL BE CLEANED OUT 'TO DESIGNED DIMENSIONS AND EROSION CONTROL . MEASURES TAKEN IF NEEDED. ANY DIKE THAT SETTLES 4 .INCHES BELOW THE ORIGINAL ELEVATION SHOULD BE BUILT BACK TO THE ORIGINAL DESIGN ELEVATION . REPLACE ROCK IN EMERGENCY OVERFLOW/SPILLWAY AS NEEDED TO MAINTAIN ORIGINAL DESIGN STANDARDS . . • • N TERRA ASSOCIATES, . Inc. : Consultants in Geotechnical Engineering, Geology and Environmental Earth Sciences July 12, 1990 Project No. T-1416 Mr. Ron Deverman Wilsey and Ham Pacific 1980 - 112th Avenue NE P.O. Box C-97304 Bellevue, Washington 98009 -7730 Subject: Geotechnical Engineering Study Forrest Creste Apartments 12200 - 12400 Block 138th Avenue SE Renton, Washington Dear Mr. Deverman: As requested, we have conducted a geotechnical engineering study for the proposed Forrest Creste Apartments in Renton. The location of the project is shown on Figure 1. The purpose of our study was to explore subsurface and groundwater conditions at the site in order to provide geotechnical information on the feasibility of developing this site, recommendations for site preparation, foundations for the proposed structures and site drainage. We also prepared information to be incorporated in an Environmental Impact Statement (EIS). The scope of our study included site reconnaissance; excavation of several test pits and probes across the site,. laboratory testing of representative soil samples, engineering analyses and the preparation of this report. This report presents the results of our observations and studies along with supporting field and laboratory test data. • SUMMARY Our study indicates that the site is underlain at a shallow depth by loose to medium dense silty sand overlying dense, gravelly, silty sand till soils. Conventional spread footings may be used as foundation support for the proposed apartments. These footings may bear on the undisturbed, competent, native soils existing at the site or on compacted fills placed above the competent, native soils. Old fill soils up to eight feet thick are present in the .northwestern corner of the site. These fills should be removed from building and parking areas. 12525 Willows Road, Suite 101, Kirkland, Washington 98034 • Phone (206) 821-7777,• FAX 821-4334 • Mr. Ron Deverman • July 12, 1990 3f Moderate groundwater seepage was noted in several of the test pits in the western portion of the site. The groundwater appears to be perched on top of the till and will produce seepage in two to three foot cuts. To minimize difficulties in working with the moisture sensitive native soils, we suggest that grading be performed during the thy season and when soil moistures are reduced. This will improve the chances for using the native materials as fill material. If grading'is to be performed in wet weather, you should plan on importing significant quantities of clean granular soils for use as structural fill. PROJECT DESCRIPTION . We understand that the 11.73 acre site is planned to be developed as 'a 200 unit, multi- family apartment complex. Twenty-one residential buildings with separate carports and one recreation building are planned for the project. The structures will probably be two and three story, wood-frame buildings with slab-on-grade floors. Some daylight basements may be constructed. At the time of our study, a site"plan showing building and roadway layout superimposed on topography was provided to us. No grading plans or building details were provided to •' us. However, we expect minor cuts and fills will be required to provide building pads, basement excavations and pavement areas on the gently sloping'site. Considering the existing topography on the site, the cuts and fills may have magnitudes on the order of five to ten feet or so. Basement walls are likely'for•the buildings in the deeper cuts. Access to the site will be from 138th Avenue SE and also from the property to the south. !' When project plans are. finalized, Terra Associates should be notified so that we can review the building and grading plans and prepare final recommendations. • FIELD EXPLORATION AND LABORATORY TESTING The subsurface exploration for this study was conducted on June 13 and 18, 1990. Subsurface conditions on the site were explored by excavating 10 test pits using a backhoe provided by All Seasons Construction of Duvall, Washington. In addition, five probes • were performed using hand auger. The test pits were excavated at the approximate locations shown on the Test Pit Location Map, Figure 2. The locations of these test pits and probes were approximately determined by pacing from assumed property corners. Elevations at test pit and probe locations were determined by interpolating between ;! contours shown on the topographic survey provided to us. ;1 The field exploration was monitored continuously by our geologist who classified the soils encountered, maintained a log of each test pit and probe, obtained representative soil samples and observed pertinent site features. All samples were visually classified in accordance with the Unified Soil Classification System described on Figure 3. The logs of the test pits are attached to this report as Figures 4 through U. The probe logs are presented in Table A. Project No. T-1416 Mr.Ron Deverman July 12, 1990 The soil classifications shown on these logs represent our interpretation of the field logs and reflect the results of visual examinations as well as laboratory tests performed on samples obtained from the test pits. Representative soil samples collected from the test pits were returned to our laboratory for further examination and testing. Moisture contents were determined for all samples. Sieve analyses were performed on selected samples. The results of our laboratory testing are shown on the test pit logs and on the grain size analysis plots, Figure 9. • SITE CONDITIONS 11 Surface The project area occupies 11.73 acres of gently sloping terrain east of 138th Avenue SE and south of SE 122nd Street in Renton, Washington. The topographic relief across the site is approximately 60 feet, rising from Elev. 395 feet in the southwest corner to Elev. 455 feet in the northeast portion of the site. In general, the site slopes toward •the southwest at inclinations of 10 to 20 percent. ' Some old fill piles are present in the extreme northwestern portion of the site. The site is vegetated with dense, middle-aged fir, cedar, maple and alder. The underbrush in the southwestern portion of the site becomes very thick. The extreme northwestern portion of the site has been utilized as horse pasture and is mostly barren of vegetation. A horse stable is present in this area. . A small stream crosses the northern portion of the site. The origin of this flow appears to be, in part, from drainage off the development to the northeast of the site. This drainage has been routed onto the site from near the projected intersection of 140th Avenue SE and SE 122nd Street. Some erosion has occurred a fair distance downslope from the outfall. The site is bounded on the west by 138th Avenue SE, across which is an undeveloped site. The southern property boundary adjoins an undeveloped, forested land. The eastern margin of the site lies adjacent to forested property and sparse single family lots. Across ;+ the northern boundary of the site is a single family residential area. Subsurface The U.S. Geological Survey has mapped the geology of the study site as Vashon till. The till was deposited about 15,000 years ago along the base of the Puget Lobe during the Fraser Glaciation. In general, our findings support the USGS determination. In each test pit, an average of about 6 inches of duff and topsoil were found to overlie reddish brown, silty sand with gravel. This deposit is underlain at depths of two to four feet By olive to gray, medium dense to dense, gravelly, silty sand till. This till material extends to depths exceeding 10 feet, the maximum depth explored. Project No. T-1416 nn ern XT.. .] • Mr. Ron Deverman July 12, 1990 Groundwater Groundwater was encountered in many of the test pits and probes excavated on the site. Light to heavy seepage wasnoted from the top of the till unit at depths of two to four feet throughout the entire western and northwestern portions of the site. The perched groundwater may be more prominent in the winter months when precipitation is greater. Groundwater conditions in the area surrounding the site were evaluated using well logs on file at the Department of Ecology. From these logs, there is evidence of a regional groundwater table at approximate Elevation 350 having a gradient to the west. Slope Stability The slopes on the site are gentle to moderate. The steepest slopes on the site were approximated at 15 to 20 percent. Given that the entire site is underlain by dense glacial till, the slopes should remain in their presently stable condition, provided, erosion prevention measures are taken. The seismic hazard associated with glacial till soils on gentle to moderate slopes,is low. The area lies outside Class III Seismic Hazard zones as delineated in the King County Sensitive Area Map Folio., DISCUSSION AND RECOMMENDATIONS i Based on our subsurface exploration and field observations, it is our opinion that the site - is suitable for the proposed apartment complex. Buildings may be founded on conventional spread footings bearing on firm native soils or on compacted structural fill. If native soils.become disturbed or wet, they should be removed and replaced with clean crushed gravel or structural fill. Roadways may be built on recompacted native soils after !E removal of fills and organic rich soils or on structural fill. Due to the moisture sensitivity and relatively low permeability of the site soils, we suggest you plan to conduct the earthwork during the. thy season and when surficial soils are not excessively moist. In wet weather, it will be very difficult to compact the onsite soils. In dry weather, the likelihood of using the onsite soils for fill will improve substantially. If +E grading work must be performed in wet weather, you should allow for import of significant quantities of clean granular soil for use as fill. E! We anticipate that minor-cuts and fills will be required for most roads and building pads. Permanent cut slopes should be graded to 2:1 (Horizontal:Vertical). Temporary cuts up to ten feet high may be made at 1:1. Fills should be constructed in accordance with recommendations in the Site Preparation and Grading section of this report and should be made at inclinations of 2:1. Project No. T-1416 Mr. Ron,Deverman July 12, 1990 If cuts encounter seepage during the initiation of earthwork, interceptor drains should be constructed on the uphill side of roadways and building pads to prevent the working area from becoming wet. Proper drainage should be installed around the perimeter of all foundations. - • This report has been prepared in accordance with generally accepted geotechnical `engineering practices. We do not guarantee project performance in any respect, only that our work meets normal standards of professional care. No other warranty, expressed or implied, is made. This report is the property of Terra Associates and is intended for specific application to this project and for your exclusive use. The following sections of this report describe our recommendations in greater detail. Foundations 3 1 Apartment buildings to be constructed on the project site may be supported on continuous and/or isolated spread footings bearing on the competent, native soils present below the topsoil and organic-rich layers or on compacted, structural fill placed above competent, native soils. The near surface soils below the topsoil are loose. Hence, depending on the depth of the excavation required to reach design footing grade, the native soils may need to be recompacted in place. If soils become disturbed and _softened by excessive moisture due to seepage into excavations or rain, these materials should be removed and clean gravel should be placed in the footing excavations. The gravel mat should extend beyond the edge of the footing a distance equal to its depth. Continuous and individual spread footings for the proposed buildings may be designed for • an allowable bearing pressure of 3,000 pounds per square foot. Footings should extend to a minimum depth of 18 inches below the lowest, adjacent, outside finish-grade. A • Gr minimum width of 12 inches should be used for continuous footings,and individual spread footings should have a minimum size of 18 inches. A one-third increase in the above bearing pressures may be used when considering wind or seismic loads. All footings should be provided with steel reinforcement in.accordance with structural requirements. Old fills are present in the northwestern corner of the site. For any structures to be constructed in this area, foundations and slabs should bear on native soils beneath the existing fills. Alternatively, the fills may be removed and replaced by structural fill. Settlements We anticipate that the total settlements for the apartment buildings supported on the competent, native soils, bedrock, or on compacted, structural fill will be less than one-half inch. Long-term differential settlement of buildings between the center and the edges ' should be less than one-quarter inch. The majority of the settlements should occur during construction. Project No. T-1416 Mr. Ron Deverman • July 12,.1990 Slabs-On-Grade Concrete floor slabs, if used, may be constructed as slabs on grade supported either on the competent, native soils or on structural fill. We recommend that four inches of a free- draining gravel, such as 1/4 to 3/8 inch pea gravel, be placed below the slab to act as a capillary break. In addition, a plastic membrane with a thickness of ten to twelve mils should be placed above the gravel to act as a vapor barrier for additional moisture protection. Basement and Retaining Walls If:lower level basements are planned, or if retaining walls are needed at grade changes on the site, the walls should be designed to resist the lateral pressure imposed by an equivalent fluid weighing 40 pounds per cubic foot (pcf). If walls are restrained from free movement at the top, they should be designed for an additional uniform lateral pressure of. 100 pounds per square .foot. These pressures assume a maximum height of ten feet and that no surcharge loads will occur. Please contact us for supplementary recommendations if conditions are expected to be different. The basement walls and retaining walls should be provided with a continuous blanket of. free-draining material at least twelve inches wide. A perforated pipe should be placed at the footing level to collect water and discharge it to the storm m drain system. • Horizontal Loads Horizontal structural loads carried to the foundations may be resisted by both friction forces on the base of foundations and passive resistance on the sides of foundations. A coefficient of 0.35 may be used between concrete and soil: Resistance to lateral loads may also be computed as passive earth -pressures exerted by the soils adjacent to the foundations. We recommend using an equivalent fluid weight of 300 pounds per cubic foot where the foundations are poured neat against undisturbed soil, or where the backfill is compacted in accordance with the requirements for structural fill. Site Drainage Surface gradients across the site should be created to direct runoff away from the apartment buildings and towards suitable discharge facilities. If cuts encounter seepage during the initiation of earthwork, provisions should be made to install interceptor drains or ditches along the uphill side of road alignments and building .cuts. These drains will prevent shallow subsurface drainage from reaching the work area and creating unfavorable soil conditions. Once detailed grading plans have been prepared, we would be pleased to review them and provide our input for additional drainage requirements, if needed. Project No. T-1416 Mr. Ron Deverman July 12, 1990 Perimeter foundation drains should be installed and tightlined away from the apartment buildings. Drains should be at the levels of footing bottoms or crawl space levels, whichever is lower. Roof gutter drains .should be separately tightlined away from the buildings. All drains should be discharged into the storm drain system. The drainage entering the site from the northeast should be routed into the storm drain system proposed for the site. Site Preparation and Grading - The site soils are very moisture sensitive and for this reason, we recommend conducting, earthwork only when soil moisture contents are low. The building and pavement areas should be stripped and cleared of vegetation and topsoil. The stripped topsoils may be used as berms or in nonstructural areas. Old fill should also be removed from building and roadway areas. Following stripping, any loose areas noted should be over excavated and replaced with structural fill or. crushed rock to a depth that will.provide a stable base. If the over- excavated area remains soft and wet, a stable subgrade may be constructed by placing a geotextile in the bottom of the excavation and placing clean, crushed rock over it. Permanent cut slopes should be made at stable inclinations of 2:1 (Horizontal:Vertical). Fill slopes should also be made at inclinations of 2:1. Temporary cuts up to ten feet high may be made at inclinations of 1:1. Cuts in till soils may be made at a 1:1 inclination. Once planned cut locations are known, we suggest review by us so that we can provide you with supplementary information regarding appropriate cut slopes. All permanent exposed slopes should be vegetated to reduce the potential for erosion. Slope areas should be properly prepared prior to placing,fills. A keyed toe and horizontal benches should be cut into native soils and the fill placed in horizontal lifts. Structural fill should be placed in thin layers and compacted to at least 95 percent of the maximum dry density in accordance with ASTM Test Designation D-1557 (Modified Proctor). All on-site soils are high in fines content making them difficult to compact in moist conditions, during rainy weather or when placed over existing wet conditions. Import fills, if needed for use in wet weather construction, should be predominantly granular with a maximum size of three inches and no more than five percent fines passing. the No. 200 sieve. To avoid excessive earthwork costs, we recommend conducting grading operations after the site soils achieve workable moisture levels during the dry season. L Project No. T-1416 b,.,__ xr_ n i • Mr. Ron Deverman July 12, 1990 Pavement Areas . Roadways maybe constructed on the recompacted, native soils after stripping the surface of vegetation, topsoil, and old fill or on compacted structural fill depending on the depth of cuts or fills required to reach design grades. The upper twelve inches of the subgrade should be compacted to 95% of the maximum dry density (ASTM D-1557). If native soils cannot be compacted due to excessive moisture contents, they should be overexcavated and replaced with a thickness of clean, gravel pit run or crushed rock suitable to stabilize the subgrade. For fills more than a foot thick, a compactive effort of 90% is adequate below the top foot. All subgrade areas should be in a stable, non-yielding condition prior to paving. l For the anticipated use, a pavement section consisting of two inches of Class B asphalt over four inches of gravel base should be sufficient for parking areas. Heavy traffic lanes should be constructed with two inches of Class B asphalt over six inches of gravel base. Utilities Where utility lines are to be excavated and installed in paved areas, we recommend that all bedding and backfill be placed in accordance with APWA specifications. Backfill placement and compaction should be in accordance with the recommendations given earlier in this report under Site Preparation and Grading. Significant seepage may be encountered in any of the excavations. The onsite silty soils will be difficult to adequately compact if they become very moist. In addition, deep utility trenches will be difficult to excavate once till is encountered. The contractor should be prepared to deal with this likelihood. Additional Services It is,recommended that we be provided the opportunity for a review of the site layout, final design and specifications in order that earthwork and foundation recommendations may be properly interpreted and implemented in the design and construction. The analyses and recommendations submitted in this report are based upon the data obtained from the test pits and probes excavated on the site. The.nature and extent of variations in the test pits may not become evident until construction. If variations then appear evident, we should be requested to reevaluate the recommendations presented in this report prior to proceeding with the construction. It is also recommended that we be retained to provide geotechnical services during construction. This is to observe compliance with the design concepts, specifications and recommendations, and to allow design changes in the event subsurface conditions differ from those anticipated prior to the start of construction. Project No. T-1416 Xi,. 0 Mr. Ron Deverman July 12, 1990 We request that a minimum of two working days notice be given to schedule our services during construction. The following figures are included and complete this report: Figure 1 • Vicinity Map Figure 2 Test Pit Location Map Figure 3 Soil Classification Chart Figure 4 through 8 Test Pit Logs Figure 9 Grain Size Analyses Table A Probe Hole Data Appendix A EIS Summary i We trust the information presented herein is adequate for your:requirements. If you need additional information or clarification, please call. Sincerely yours, TERRA ASSOCIATES, INC. • Anil Butail, P.E. 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' I 'I.. r: PEs 1tttlDcov ) li Fi !G= I11IQ' h LEGEN[]• :III' - "°_till,1111..,--:.::,...,.,:,:i i I,' t l/ _ - -•l� .. .`t ;v,??ill 4w } e: r.40, b -:::_.,;:!::.�= -A ���� � . r �l I r 11 -`=.r �TP-1 1 Approximate location and 4. • � 9 5: 3 ?-: :i:;:I:i :.ie, ' ..� _ it number ; „" _ of test plt.w S a•.• rtrTi.I,I=•:a., I' It i I. i"; �. �I z: gp=: _„�, ,I: -' s 5� , i m,i �ul!1::. �� to= ,ir lid ' ::I:,_ x :�I' I .. 4, fll�,► 11,, I P-1 S • / �3 �.,I;�'�;� �„ �; : ` -. r°�=� =` 4 ,1-: ,; . 5 Approximate location and: .a .ii:1_111,11.:,......il,:;7:i''.:.1.:67.1.,,ii...::'; 'i�` .'il ' / ;• \ � '�1;'fl 1-.: �111L� ��' � � = number of probe.. L � ` - Mr•-:.••.. 1:. 1` . !.: •fr. 3 ' I' �L ,-;. r 1 �Ii ,'I r�_�: f itzit4 , I�.� • .■II�:•`_ �' ii P _ '- 7!111 . - }, 71�1,,11,.1 ni ■il�i '_ if nTP7 ig ■Isla:-., . liiiiiiipp .Y ,n �° .s. . ug:INF; _: 4*/1,17to •al�' r �:: • _) _ Ih•fwr I,a• ryc q��.{ ���^ _- ,,i �'x:{}••::._ .c>• ./• ILlift r¢• , I,?.. - 1�'- ' a* ♦^,.sti n� A _:.-: �' •1•�l�i;4•"'::'iv �r=� _miiiir ■:II 1.,ry ! ,II t q� S �4 _ F� r_� i r=�- Is',. z3ICI rili, :. ,.. r - _._`_::. j_ n ; '—-_-3' . . .. .. _ ((! •iiiir...„. � 1 it ■�►•% '7�7=Yt .E•` - - - -- I'-s: ..CIri; 1_ •,7se� — '•..Y�'"•:1` i�l I,�'f=c `" , G I !r�! '' - i.l.� �If�d .: ' ` BIZ / {,, ;IIII'•z:- ay:; S`~!:! chic,: �:' , �' Ara.' Iliilj "+ � G 1 .' `� i . • �. il r j �: : - _ -3. Egli'', _ _ __ _.: . ..... . . ter- , : i ::� Jr.. :, ...,• .—.J.•T•.._. :',-;-- ,,,:=.. - •......,mac- ^ Z3 ,,1„„ms i -, „,,.... ,...,___ _.--,------_______,E. . 1'�"'•L_�.r+...'+o.m.-J�lT�.s t '-4Y J'r•- '. ,{ Y e_-_' ', I kb 6,!� I�il! "t ' I I ■■I���■I/`/ —> o-f: "I.. ,--:_' -3* r T ! rt1l• � ,/� _ / i .....„. ' . .,I i rim' — -- 'I 1 I ,......, • I ' -, .: .. ......„.•-•,. , .. . . - AV - / r -----7-'-- - ' N is.5., -- ! I111' 1 dso�t� �1�' - ,�. — a 7 OI — f — — - _ I _ _____ Ave. S.E. - I Ja. / N W • i 0 ;r• •' TERRA PO SITE PLAN • RREST CRESTS APTS. \\��` ASSOCIATES to RENTON, WASHINGTON REF.: Site Plan provided by Tho Berry & Berry Aesoclated, Architect, detr,l September ?n ''tGpa• Geotechnical Consultants Pro]. No. 141n 1 natA 0inn 11-1........... r: t 1 SOIL CLASSIFICATION SYSTEM i --1 MAJOR DIVISIONS LETTER GRAPH I SYMBOL SYMBOL TYPICAL DESCRIPTION GRAVELS Clean :Q;o� Well-graded gravels, gravel-sand mixtures, JGravels GW . `o..,\ little or no fines, �� 50% (less than 1 More than of GP Poorly-graded gravels, gravel-sand mixtures, O coarse fraction 5% fines). little or no fines. N `r : Silty gravels, gravel=sane silt mixtures, 0 ,,, is larger than Gravels GM ..�.,..c' ' W • .�•.�• non-plastic fines. z c� �' No. 4 sieve. with fines. _ ZZpi > GC Clayey gravels, gravel-sand-clay mixtures. e, J plastic fines. aE 75 Clean ' Well- raded sands ( o o SANDS SW g gray 11, sands, W c o Sands little or no fines. z More than 50% of (less than SP Poorly-graded sands or Gravelly sands, 5/° fines). :''``;`> little or no fines. Q o c coarse fraction s':t Silty sands, sand-silt mixtures, °t O � .L is smaller than Sands SM non-plastic fines. r U with fines. N Clayey No. 4 sieve. SC sands, sand-clay mixtures, • plastic fines. SILTS AND CLAYS slt Inorganic silts and very fine sands, rock flour, J ML silanttyy orn claylasticiteyyy.fine sands or clayey silts with - o Liquid limit is less than 50%. j Inorganic clays of low to,medium plasticity, ( 0 o CI- ' // 4 -rlaays. clays, sandy .clays, silty clays, lean N ((( W o o GL Ill�I�,iriri Organic silts and organic clays of low Z o z y111111111 plasticity. <L L �; SILTS AND CLAYS MH Inorganic silts, micaceous or diatomaceous cr �, ` .� fine sandy or silty soils, elastic. �' ° CH ' Inorganic clays of high plasticity fat clays. W a, Liquid limit is greater than 50/°. 9 y g p y ° E ,; Z C9 fr I, I , I � OH : !I I I r II Organic clays of medium to high plasticity, i i'iI III organic silts. HIGHLY ORGANIC SOILS PT ":•,,::' Peat and other highly organic soils. DEFINITION OF TERMS AND SYMBOLS 2 OUTER DIAMETER 'I 'SPLIT SPOON SAMPLER C TORVANE READING,•tsf • 2.4" INNER DIAMETER RING SAMPLER OR SHELBY TUBE SAMPLER QU PENETROMETER READING, tsf P SAMPLER PUSHED W MOISTURE, percent of dry weight X SAMPLE NOT RECOVERED pcf DRY DENSITY, pounds per cubic foot - Q WATER LEVEL (DATE) • LL LIQUID LIMIT;percerlt iWATER OBSERVATION WELL PI PLASTIC INDEX N STANDARD PENETRATION, blows per foot i C : ;,y..,•. T E R RA " '�' FORREST CRESTE APARTMENTS ASSOCIATES RENTON, WASHINGTON GeotechnicaI Consultants f''rni NI,1 idiP I n.,r,, Guinn 1 ;. • • TEST PIT NO. TP-1 • Logged By JJ • II • Date 6-13-90 Elev. 412± ili Depth W (ft.) USOS Soil Description (%) . 0 T-.� '.� 2" ARM." — "SM Red-tan, silty SAND, trace gravel, rootlets, .17 — very moist. loose to medium dense_ • :; SM/ Olive, gravelly, silty SAND and SAND, moist SP to wet, medium dense. 4 . 11 — :.. SM Gray, gravelly, silty SAND, moist to very moist, dense .to very dense. (TILL) _fir% • 10 Test Pit completed at 9 feet. • — No groundwater seepage encountered. _ No caving. 15 TEST PIT NO. TP-2 . • • Logged By JJ - 1 Date 6-13-90 417± Elev. 0 >7 , 9" DUFF and TOPSOIL Red-brown, silty SAND with some gravel 18 .' SM and charcoal, very moist, loose. Grades to medium dense. • II i 5 SM Olive-gray, gravelly, silty SAND, moist, —:t: : _ dense to very dense. 11 (TILL) ij I • , • 10 • Test Pit completed at 9 feet. • No groundwater seepage encountered. —• No caving. . 15 . • `TEST PIT LOGS ,/..•�..*. TERRA ! F:3RREST.CRES'iE • ASSOCIATES •.•: Renton, Washington ii •Geotechnical Consultants Pro). No. 1416 • Date 6/90 Figure 4 • TEST PIT NO. TP-.3 - Logged By JJ Date 6-13-90 432± Elev. Depth • W (ft.) USCS Soil Description (%) 0 8" DUFF and TOPSOIL Reddish-tank silty SAND with some gravel and — SM roots to 18 , moist, loose to medium dense. SM Olive, gravelly, . ilty SAND, moist, medium _ ~` ;. • dense to dense. (Weathered Till) . - SM . Gray, gravelly, silty SAND, moist to very 12 moist, dense to very dense. (TILL) . . Occasional cobbles. 10 . Test Pit completed at •94 feet. . — No groundwater seepage encountered. • No caving. • 15 • TEST PIT NO. TP-4 Logged By JJ F Date 6-13-90 Elev. 420± .! 0 --� 4"- DUFF • ' SM t-Reddish-bryyn, I —'� •: silty SAND with gravel, trace charcoal, roots to 22 ,.•very moist to wet, loose. i • — : ti SM Olive,' gravel, silty SAND, very moist to wet, 15 j medium •dense. ` ` I 5—•; • Gray, gravelly, silty SAND, very moist, SM dense. (TILL). • I 11 II 10— ' Test Pit completed at 9 feet. — Light groundwater seepage encountered at 11 — 5 feet.. ' — No caving. . 15 • • 'TEST PIT LOGS TERRA ASSOCIATES � � FORREST CRESTS AFARTIVIEWS ���� �r Renton, Washington Geotechnical Consultants • Pro). No, 1416 ` Date 6/90 Figure 6 t • TEST PIT NO. TP-5 • Logged By U. Date 6-13-90 • Elev. 398± Depth W • '(ft..) USCS Soil' Description (%) 0 8" DUFF and TOPSOIL _ ''• SM Reddish-brown, silty SAND) abundant roots to ' • • —�'`�;` I8", very moist to wet, loose. - —!W . Olive to gray, gravelly, silty SAND, moist to 5-- :. SM very moist, dense to very dense. 10 (TILL) • • • • Test Pit completed at 82 feet. 10 Moderate to heavy groundwater seepage- at 3 — 2 feet. — - No caving. 15 • Logged By JJ • TEST PIT NO. TP-6 Date 6-13-90 Elev. 436± 0 "`y:.—„, 3" TOPSOIL • . —:: .f r nir rirh., s-i Fry SANI) _ S1 Reddish-brown, silty SAND with gravel, wet to ;, very moist, loose to medium dense. 1' f, :*:•., Weathered 'M I 5 `, ;" SM -Olive to gray, gravelly, silty SAND, very moist, dense to very dense. . 16 . . • 10 Test Pit compelted at 8= feet. Moderate groundwater seepage encountered — at 3 feet. No caving. , 1 • 15 `PEST PIT LOGS TERRA ' �W., - ASSOCIATES Renton, Washington • Geotechnical. Consultants . Proj. No. 1416 Date 6/90 Figure 6 . , 1. . • • . . .. . . • . . • . . •• . . • . . TEST PIT NO... TP-7 . .. . • • . . . • Logged By JJ Date 6-13-90 . Elev. 444± • . Depth W (ft.) • USCS Soil Description (%) 0 . R" MDT and TOPSOTT, ..:L..:.. . . .. Reddish-brown, silty SAND with gravel, roots , '.".- SM to 21 , ,mist to wet, loose to medium dense. --,:.., • . . . . . . , . . , • Olive to gray, gravelly, silty SAND, wet- to . . . . . .0--1:.•:.': moist, medium dense to very dense. . . • • --.7.:1 .". • • • . . (TILL) ----fA:', • . :-,..',:•:f •. . . . . , . . . . 10-- ' Test Pit completed at -9 feet. • . . . — Light groundwater seepage encountered at . • , — . 3 feet. . . . — No caving. • 15 TEST .PIT NO. TP-8 Logged By J-T . . , ' . Date 6-13-90 . Elev. .419± , • .. . . . 0 7...,, ,,, 8" DUFF. and TOPSOIL . : •':;:.:-.- Reddish-brown, silty SAND with some gravel, SM roots :E0. 31 , very moist to wet, loose to riedium dense. • . • !.,..:-- ..: . . :.,..,..* . ' 5 -":'•- Olive to gray, gravelly, silty SAND, wet to • SM very. moist, medium dense to very dense. —,.:4• : . . • •:: •:i.: 1 • .-.. :./: (TILL) • .;.•\.::••:• , . 10. . Test Pit completed at 9 feet. Heavy groundwater seepage at 3 feet. No.caving. - . . . • . -- • • . 15 - • • . • . . . . •• _ • , . ; . . . YEST PIT LOGS ..-..:.!.....: TERRA . FCIRREST CRESTE APARTMENTS ASSOCIATES • attoo • . Renton, Washington . • Geotechnical Consultants Proj. No. 1416 Date 6/90 Figure 7 • . . . . . ... . ,. . . . ... . • . • . i • • . , . .. . . • • . . • . • • TEST PIT NO.:•• 'TP-9 . • . . . • - I • . Logged By JJ ., • • • Date 6-13-90 . . Elev. 422t • ,.• fl Depth W: (ft.) USCS Soil Description (%) . 0 - - 6" DUFF and TOPSO/L ' • . . • . • . --\.-z*--:•.•: sm Reddish-brown, silty SAND, • moist to wet, 21 . . -•-••••::::: loose to medium dense. . • . 1 .4 Roots to 2- feet. • . • . 1 . '7-;$'`, • . • • . • . . . . . , • . . -::•-•: . . • 5---:-,..-,: Olive to gray, gravelly, silty SAND, very 13 .—:..:.,.:. SM moist, dense. . :.• - •::::• ... (TILL) • . -, :::.,, •. . • . .. 10. - • • • Test -Pit completed at 9-1- feet. . Light seepage at 4-5 feet. • . . • 1 , — • • No caving. . • " 1 • . . • 15 • . • . TEST .PIT NO. TP- 10 . • Logged By - JJ P • Date 6-1-3-90 Elev. 3911: 0 . . LEV . • . 2:>-•-:.::.: SM . . brown, silty SAND, with sare gravel, roots to . — .52..'-':'t 2'. very moist., medium dense. • . SM Tan, gravelly, silty SAND, wet, rredium dense. • . ..:..:• •--.4. - Gray, gravelly SAND, occasional cobble, very ....%, 11 SM moist, very dense. . -.. . . • . . _ Test Pit completed at 6 feet. • .. — Moderate seepage at 3 feet. . . -- •. No caving. . • . 10 . • . . . • . 15 . • . • '• . •• .. , L:TEST PIT LOGS - • marl TERRA . • FCIRREST CRESTE AR4RTIVIENTS ASSOCIATES Renton, Washington ..,: Geotechnical Consultants Proj. No. 1416 ' Date . 6/90 Figure 8 '. • . • ::•:... . .. SIEVE ANALYSIS HYDROMETER ANALYSIS ` SIZE OF OPENING IN INCHES I NUMBER Cc MESH PER INCH. U.S. STANDARD GRAIN SIZE IN MM m co C 0, C. �' O O O O O O O O O O O O O O LOi S •-. 100- -_____■_ __ 1�� _.__ �..■■._vim 0 = >i.;•.• • 90-__�___■___r I���� ■___�..■■■__ 10 �_�_�_■__� �.■__ ....■.__fit• —___ rll___1111 I,■-- ��_■__��_...■■M_I_� - '-- -= _______.►�__t�ir �--_____ _____ __—� ao�� �_�_am•___ — �.■.■.__ 20 �- -I I _i�11��_I�MM��- �--_EIHM :11111 iv■■i :— fl > m __t�.__ �L__�_. ■::■.__t_� i z C____■_ �'�' '�� L1=I___■CC_.� ..■.__—� n _ �__�- _. �ti■___��■.■._�� _• >_i �=��C=��CZ=i" :sue:����::::���� _ __.___ �'��..��_■__ �...■.___� --I = r z —__C__■___M ■___�.. ■.___� • - ram') z 50 ___■____ ���`��_■__ ______ ___� 50. C7 1 ___■-- — ii�00•11 i _i___� �:�iii_I_� O a =alai M ISIIMMIIIIZE=1111bra= M - =_:9:o — _1.. .. - �_ ___Be cn =1.1..sualgrinurommi " m M �I•���_.__ �_. � 1111=11111111__���.�M■___II...■.__ ci _____ - SM__ ___ W..1_1_lililili__ 70 ._■___ 1 m -- 0(. = m■.=■_ m 5 - _ _::mid= aL__ __ MIMmuso _ ■ ___ • =_.___�...■.___ IIIIIIIIMIM 73 (1)M --7-3. o -- I I. II = ..v.maill-1.E m J _ O .-' G O O O O O c0 [9 <D V CO N m cD V O N W tD v 0 N C)O O O O O CV O C_ 1 Z """� O CD q 0 R C, N .-• 0 O. 0 0 0 • O 0I —I z " GRA!N SIZE IN MILLIMETERS ' Z m (�! COBBLES COARSE FINE COARSE MEDIUM FINE 1f FINES m GRAVEL SAND 1 co D m R O 1 • _ Dp DBoring or Depth • Moisture PL Z Key USCS Description o L� -Q D3 r Test Pit (;t.) Content (/o) -< C- Z m {n --T TP-6 5 SM Gravelly, silty SAND. 16 z u^ —I TP-9 1.5 SM Gravelly, silty --0 SAND. 21 m —0 TP-2 2 SM Silty, gravelly SAND. 18 • Table A Probe Hole Data t Forrest Creste Renton,Washington Depth Probe Hole (inches) Soil Description P-11 0.0 - 9.0 Dark brown, silty SAND with charcoal and organics. 9.0-30:0 Reddish brown,silty SAND with gravel, moist, loose to medium dense. 30.0-36.0 Olive, gravelly,silty SAND,wet to very moist, medium dense to dense. (TILL) P-12 0.0 - 12.0 Dark brown, organic rich topsoil. 12.0 -24.0 Reddish brown, gravelly, silty SAND, wet, • loose to medium dense. Heavy seepage at 18.0" -24.0" • P-13 ' 0.0- 8.0 Duff and Topsoil. 8.0 -24.0 Reddish brown, silty SAND with gravel, • roots to 18", moist, loose to medium dense. 24.0 - 26.0 Gray, gravelly, silty SAND, moist, very dense. (TILL) P-14 0.0 - 8.0 Duff and Topsoil. 8.0 - 30.0 Reddish brown, , silty SAND with gravel, roots to 18", moist to very moist, loose to medium dense. 30.0 - 36.0 Olive, gravelly, silty SAND, very moist to wet, medium dense to dense. (Weathered Till). Moderateseepage at 24". Project No. T-1416 • Table A (cont) Probe Hole Data Depth Probe Hole (inches) Soil Description P-15 0.0- 3.0 Topsoil 3.0 -36.0 Reddish brown, , silty SAND trace gravel, roots.to 18", moist, medium dense. 36.0-48.0 Olive, silty SAND and SAND,wet, medium dense. g 48.0-49.0 Gray, gravelly, silty SAND,very moist to moist, dense to very dense. (TILL) Light seepage at 4 feet. • Project No. T-1416 ' is • APPENDIX A EIS SUMMARY •. I a • I 1 ^' 6 1 ' APPENDIX A EIS SUMMARY Surface • The project area occupies 11.73 acres of gently sloping terrain east of 138th Avenue SE and south of SE 122nd Street in Renton, Washington. The topographic relief across the site is approximately 60 feet, rising from Elev. 395 feet in the southwest corner to Elev. 455 feet in the northeast portion of the site. In general, the site slopes toward the southwest at inclinations of 10 to 20 percent. Some piles of old fill are present in the extreme northwestern portion of the site. . i The site is vegetated with dense, middle-aged fir, cedar, maple and alder. The underbrush in the southwestern portion of the site becomes very thick. The extreme northwestern portion of the site has been utilized as horse pasture and is mostly barren of vegetation. A horse stable is present in this area. A small stream crosses the northern portion of the site. The origin of this drainage appears to be, in part, from drainage off the development to the northeast of the site. This drainage has been routed onto the site from.-near the projected intersection of 140th Avenue SE and SE 122nd Street. Some erosion has occurred a fair distance downslope from the outfall. The site is bounded on the west by 138th Avenue SE, across which is an undeveloped site. The southern property boundary adjoins an undeveloped, forested land. The eastern margin of the site lies adjacent to forested property and sparse single family lots. Across the northern boundary of the site is a single family residential area. Subsurface The U.S. Geological Survey has mapped the geology of the study site as Vashon till. The tills was deposited about 15,000 years ago along the base of the Puget Lobe during the Fraser Glaciation. • In general, our findings support the USGS determination. In each test pit, an average of about 6 inches of duff and topsoil were found to overlie reddish brown, silty sand with gravel. This deposit is underlain at depths of two to four feet by olive to gray, medium dense to dense, gravelly, silty sand till. This till material extends to depths exceeding 10 feet, the maximum depth explored. Groundwater Groundwater was encountered in many of the test pits and probes excavated on the site. Light to heavy seepage was noted from the top of the till unit at depths of two to four feet throughout the entire western and northwestern portions of the site. The perched groundwater may be more prominent in the winter months when precipitation is greater. Groundwater conditions in the area surrounding the site was evaluated using well logs on file at the Department. of'Ecology. From these logs, there is evidence of a regional groundwater table at approximate Elevation 350 having a gradient to the west. Slope Stability The slopes on the site are gentle to moderate. The steepest slopes on the site were approximated at 15 to 20 percent. Given that the entire site is underlain by dense glacial till, the slopes should remain in their presently stable condition, provided erosion. prevention measures are taken.The seismic hazard associated with glacial till soils on gentle to moderate slopes is low. The area lies outside Class III Seismic Hazard ,zones as delineated in the King County Sensitive Area Map,Folio. ENVIRONMENTAL IMPACTS Some effect on the environment will be unavoidable during and after the developmentof this site, as construction of roadways and buildings cannot be performed without modifications to the existing ground surface. Roadway areas and building areas will be stripped of topsoil and materials unsuitable for support of structures. If rains 'occur during earthwork operations, some erosion of the barren soils may occur. The existing shallow groundwater table will be interrupted by earthwork and utility installation. This may be considered an unavoidable impact. IMPACT MITIGATION The effects of the development of this site 'on the environment may be minimized, in large part, by careful construction practices. 'Bare soil, particularly on slope areas, should be protected with jute mats and/or immediately seeded with appropriate vegetation to prevent erosion. Stormwater should not be allowed to flow over site slopes, but should be contained in retention/detention ponds or be tightlined to a suitable 'collector system or ditchline. Final Forrest Creste Environmental Impact Statement September 1992 Cs City of Renton, Washington Planning/Buicing/Pubic Worts Department L,,, a r FINAL ENVIRONMENTAL IMPACT STATEMENT FOR THE PROPOSED FORREST CRESTE PROJECT 1 ^' ! �r ( r City of Renton Planning/Building/Public Works Department Renton, Washington Prepared for Review and Comment in Compliance with The State Environmental Policy Act of 1971 as Amended in the Revised Code of Washington 43.21.0 and the Renton Environmental Ordinance # 4260 (City of Renton) FACT SHEET Project Title Forrest Creste Proposed Action The Proposed Action includes two distinct components: a rezone from G-1 use (general purpose) to R-3 use (medium density, multi-family) and site plan approval. The proposed site plan is for the construction of a 200-unit multi-family apartment complex known as Forrest Creste. The development is proposed jM1 by Ray LaBlanc. L�. Project Location The proposed Forrest Creste site is located on approximately 11.9 acres, in the City of Renton, east of Duvall Avenue NE, north of NE 6th Street (if"extended) and south of the Park Terrace subdivision. Action Sponsor City of Renton Planning/Building/Public Works Department Municipal Building 200 Mill Avenue South Renton, Washington•98005 Implementation Date Fall 1992 i y (Tentative) Lead Agency City of Renton, Washington Responsible Official Donald K. Erickson, Zoning Administrator Planning/Building/Public Works Department Municipal Building, 3rd Floor 200 Mill Avenue South Renton, Washington 98055 (206) 235-2550 Contact Person Lenora Blauman, Senior Planner Planning/Building/Public Works Department Municipal Building, 3rd Floor 200 Mill Avenue South Renton, Washington 98055 (206) 235-2550 ilk Approvals or Permits Required Site plan approval, building permit, street construction and related utility permits, such as electrical and storm sewer permits. Principal Contributors W&H Pacific, Inc. (Primary Author, Wetlands Delineation, Traffic) 3025 112th Avenue NE P.O. Box C-97304 Bellevue, Washington 98009-9304 Terra Associates, Inc. (Geology) 12525 Willows Road, Suite 101 Kirkland, Washington 98034 David W. Browne Engineering (Drainage) 105 Wyatt Way N, Suite D Winslow, Washington 98110 • - Issue Date for Draft EIS May 4, 1992 Comments Due on Draft EIS June 4, 1992 Issue Date for Final EIS September 14, 1992 Cost of Document Final Environmental Impact Statement $15.00 Draft Environmental Impact Statement $11.00 I 1' I I ;n TABLE OF CONTENTS Page FACT SHEET i I TABLE OF CONTENTS iii LIST OF FIGURES iv SECTION 1 - SUMMARY 1 - 1.1 INTRODUCTION 1 1.2 PROJECT DESCRIPTION 1 1.3 PROJECT HISTORY 3 1.4 ALTERNATIVES INCLUDING PROPOSED ACTION 3 Proposed Action - Site Plan A 3 Alternative 1 - Site Plan B 4 Alternative 2 - No Action 4 1.5 AREAS OF ENVIRONMENTAL SIGNIFICANCE 4 SECTION 2 - ALTERNATIVES INCLUDING PROPOSED ACTION 18 2.1 INTRODUCTION 18 2.2 EIS ALTERNATIVES 18 Proposed Action - Site Plan A 18 Alternative 1 - Site Plan B 20 Alternative 2 - No Action 20 SECTION 3 ERRATA TO THE DRAFT ENVIRONMENTAL IMPACT STATEMENT 22 iu SECTION 4 COMMENT LETTERS AND RESPONSES 26 LIST OF FIGURES Figure 1 - Vicinity Map 2 Figure 2 - Proposed Action 19 Figure 3 - Alternative 1 - Site Plan B 21 Figure 4 - Project Trips as a Percent of Existing Traffic Volumes 25 1, , i I ' JI I i r iv ' I I Section 1 Summary SECTION 1 - SUMMARY 1.1 INTRODUCTION ! This Final Environmental Impact Statement(FEIS) analyzes the potential environmental impacts ' to the subject site and surrounding community that would be associated with the Proposed Action I and each of the two alternatives. This chapter summarizes the Proposed Action, its alternatives, and their environmental impacts and mitigation measures. This chapter also discusses the project history and public involvement process for the Forrest Creste proposal. Chapter 2 describes in more detail the alternatives including the Proposed Action. Chapter 3 identifies any errata found in the Draft Environmental Impact Statement (DEIS). Chapter 4 includes agency and public comment letters and the responses to those letters, as well as the meeting minutes to the May 21, 1992 Public Meeting. The proponent's objective is to provide a medium-scale, multi-family residential housing development to serve the population growth in the city of Renton. The proposed development would provide housing near employment centers, service and commercial areas and major transportation corridors. s~' 1.2 PROJECT DESCRIPTION The Proposed Action is the development of a 200-unit multi-family residential complex on . CI approximately 11.9 acres (approximately 17 dwelling units per acre), located in the City of tr Renton, east of Duvall Avenue NE, north of NE 6th Street (if extended) and south of the Park Terrace subdivision (see Figure 1). The complex, known as Forrest Creste, is being proposed by Ray LaBlanc. Townhouse units are proposed along the northern edge of the site with more traditional apartment units to be constructed on the remainder of the property. A recreation building, swimming pool, and sports court are planned for the middle of the complex. Two children's play areas are proposed east and southeast of this center. Parking for 350 cars is proposed. Also, a landscaped buffer, ranging from approximately 20 to 40 feet, is planned for the perimeter of the property. Approximately .61 acres of wetland would be preserved and protected by a 100-foot buffer. A small (0.03-acre) wetland in the northwest corner of the site would be protected by a 40-foot buffer. The proposed project would also include a trail system throughout the site that would integrate the residential units with planned recreational uses. Native vegetation would be _..� retained around these trails as much as possible. Primary access to the proposed development would be from Duvall Avenue NE. Emergency access is proposed from 140th Avenue SE. A 30-foot right-of-way road dedication for the • proposed NE 6th Street would be allocated along the southern edge of the site. . - KING COUNTY C9�F�4 oq� r-, 405 .off RENTON CITY LIMITS �A .s,--- r"- .7—' . ui zL -1 ,i ,_ i > . ........., 1 u.) v r 1 w N.E. 12TH ST. S _ N.E il) "AK DR. i cri N.E. 10THrlli ,_ 4/ ST. Li I 2 ‘.it. z z "J 2 N.E. ui u.i `~' 7TH ST. ` c z 4 1 z > p W. ;� O z ct 2 ` z :ril : �. S.E. 122ND ST. z z m ui z o i L> • = LL Q PROPOSED �` SITE W 0 U N.E. 4TH ST. J Iui2 zo S� cc �.i 0Q u; ui ��. vi uo ' La � a a LI in rl --IL IJ t _ dr9A( I--I et‹. h�Y SR-169 fTh k __ Forrest Creste Renton. Washington Vicinity Map I PACIFIC Not to Scale 2 • Figure 1 1 t 1.3 PROJECT HISTORY In September 1988, a Forrest Creste proposal was submitted to the City of Renton for a land ' use rezone and site plan approval by the original proponent, Dominion Developments, Inc. The Environmental Review Committee (ERC) for the City of Renton reviewed the proposal and ( SEPA checklist in November 1988 and requested that a traffic study be completed to address the potential transportation impacts of the proposal. In June 1989, the ERC issued a Determination of Non-Significance with Mitigation (MDNS) to address impacts on the environment from the proposed development. An Environmental Impact Statement (EIS) was not deemed to be required. However, the ERC's decision was appealed by local residents who believed the proposal would have significant impacts on the environment and the surrounding neighborhoods despite proposed mitigation. During an appeal hearing in October 1989, other environmental issues were identified by residents as having probable significant impacts. In November 1989, as a result of the appeal process, the City of Renton Hearing Examiner found sufficient evidence of potential impacts to the environment and directed the City to have an EIS prepared for the Forrest Creste proposal. Under SEPA (WAC 197-11-360), any proposal judged to have the potential of significant adverse impacts should be carefully studied for its effect on the natural and built environment before any further decisions are made on the r proposal. In January 1990, The ERC issued a Determination of Significance(DS) and requested public and agency comments on the range of environmental issues that should be addressed in the EIS. Project scoping and the EIS process began in Spring 1990. A formal scoping meeting for the Forrest Creste proposal was held in June 1990. In August, 1990, the original proponent, Dominion Developments, Inc., withdrew from the proposed project. The new proponent, Ray LaBlanc, is carrying the project forward with some revisions to the original proposal. 1.4 ALTERNATIVES INCLUDING PROPOSED ACTION Proposed Action - Site Plan A The Proposed Action for Forrest Creste includes two distinct components: a rezone from G-1 use (General Purpose) to R-3 use (medium density, multi-family) and site plan approval. The Proposed Action includes the development of a 200-unit multi-family residential complex on approximately 11.9 acres (approximately 17 dwelling units per acre), located in the city of Renton. The proposal includes 24 two-story townhouses grouped in units of four or six along the northern edge of the site. The remaining 176 units and associated parking would be housed in 15 three-story apartment buildings on the rest of the property (see Figure 2). Recreation facilities would include a clubhouse, swimming pool, and sports court. Two children's play areas would also be provided. The .61-acre wetland in the southwest corner of the site would be protected by an 80- to 100-foot setback buffer and the .03-acre wetland in the northwest corner would be protected by a 40-foot buffer. Primary access to the site is planned from Duvall Avenue NE. A 30-foot dedication for the proposed extension of NE 6th Street is 3 I P I I}i I planned along the southern portion of the property for additional access. Access for emergency vehicles only would be provided from 140th Avenue SE. Alternative 1 - Site Plan B This document also evaluates an alternative site plan (Site Plan B). The density proposed under this alternative would be the same as the Proposed Action, i.e., 200 units. The layout of the I 24 townhouse units on the northern edge of the property would be altered (see Figure 3). A large open space would remain in native vegetation in the southwestern section of the site with appropriate buffers for the wetland in this corner of the property. The configuration of the 15 apartment buildings would be altered but the design of the buildings would remain the same. ) A recreation center, pool and sports court would be clustered in the northern portion of the site. Access to the proposed site would be from Duvall Avenue NE with emergency access from SE 140th. The 30-foot dedication for access from the proposed NE 6th Street would remain the same. Alternative 2 - No Action Under the No Action Alternative, the proposed multi-family development would not be constructed at the site. The property would remain in its natural state. Zoning would remain G-1 since no other development proposals are pending for this property. This zoning would , allow subdivision development of single-family housing at one-acre densities or other semi-rural I uses. Should subdivision and single-family homes be proposed on the property, platting and site plan approval for five or more homes would be subject to SEPA review. In addition, the City of Renton would require a drainage plan, clearing and grading permits, and building permits -I normally associated with development. • 1.5 AREAS OF ENVIRONMENTAL SIGNIFICANCE This section summarizes the significant environmental impacts that would likely result from development of the Forrest Creste site. This section addresses the impacts for the Proposed i Action, one other build alternative, and the No Action Alternative. It also summarizes basic mitigation measures that would reduce the identified impacts. A complete mitigation measures document will be developed by the City's Environmental Review Committee following adoption of the FEIS. I As specified by state law (RCW 82.02.020 and RCW 43.21C.060), development can only be required to provide mitigation that is reasonably necessary as a direct result of the proposed action. Further, the mitigation measures must be reasonable and capable of being accomplished. Developers can enter into voluntary agreements with jurisdictions to pay fees in lieu of modifications to the proposal to mitigate for off-site impacts. The agency requesting the mitigation must show that there is a reasonable correlation or "nexus" between the direct impacts of the development and the requested mitigation. • The Draft Environmental Impact Statement (EIS) addressed other notable but less significant impacts to the natural and built environment. These issues were identified during the scoping process. Chapter 3 of the Draft EIS discusses each of the issues that follow in detail. In the -° sections that follow, information not contained in the Draft EIS is underlined. EARTH Impacts • Development would result in earth-moving activities on the site. Excavation and clearing would be required for building foundations, driveways, utility trenches, and road beds. • There would be increased soil compaction and increased potential for soil erosion. Mitigating Measures • An erosion control plan would be implemented prior to and during earth-moving activity. • Clearing and grading of the site would be limited to the months of March through October. • Site preparation would follow the recommendations included in the geotechnical study included as Appendix B. • Wetlands and their buffers would be protected by flagging construction limits to ensure that heavy construction equipment would not enter the setback zone. • Footing drains to be installed and discharged to the storm drain system per the soils report. • Soils engineer to approve conditions and base prior to placement of any slab on grade. !�p • All slope cuts to be managed by the soilsengineer. • Water trucks to be on site to prevent dust problems. Unavoidable Adverse Impacts • Grading operations and vegetation removal necessary for urban development would alter the existing ground surface on the site. Some potential for erosion would be created during the construction phase. 5 AIR Impacts • The projected 1,235 vehicle trips per day would increase carbon monoxide levels as well as other auto-generated emissions. • Fireplaces and/or wood stoves would contribute smoke and particulates to the air. • There would be short-term, localized increase in pollution during the construction phase of the project. I 4 Mitigating Measures • Road improvements suggested in Section 3.12 (Transportation) would help to minimize congestion internally, which would lower emission rates. • Construction techniques, such as watering of cleared and excavated areas, would minimize the dust raised by earth-moving activities during clearing and construction phases of the project. • Electricity and natural gas would be installed as primary heating sources in the proposed housing units. • The proposed project could be designed without wood stoves and/or fireplaces. Unavoidable Adverse Impacts • Wood stoves and fireplaces would contribute particulate emissions to the surrounding ?~ environment. Combined with other sources of particulate emissions they could contribute to levels which would exceed the 24-hour standards and lead to the region-wide burn ban being enforced. WATER Impacts • The project would convert approximately 41 percent of the property to impervious surfaces including roads, roofs and driveways. Replacement of natural surfaces with impervious ones would result in increased rates and volumes of surface water. Additional runoff would increase the potential for erosion, particularly during construction when clearing and grading would occur. I '7 6 • Conversion from an undeveloped wooded area to an urban neighborhood would result in an increase in urban pollutants including: heavy metals, oil and grease, sediment, nutrients, ` pesticides, and other toxic materials. LT r�. Mitigating Measures • To mitigate potential erosion and sediment impacts, Renton requires that an Erosion/Sedimentation Control Plan be provided to prevent sediment-laden runoff from leaving the site during construction. These measures would include the use of filter fences, straw bales, sediment traps. and ponds, among others. • Since Forrest Creste is located within an Aquifer Protection Zone, it would be subject to the provisions of the pending Aquifer Protection Ordinance. • Biofiltration swales would most likely be required to assure water quality protection. • A storm drainage system would be designed to meet standards set by the City of Renton based on the King County Stormwater Manual. • The storm water drainage system would limit the peak runoff rate so that it would not exceed • the pre-development runoff rate. To accomplish this, natural and engineered detention and filtration systems would be used. • Wetlands would not be disturbed during grading activities and buffer areas would help reduce impacts. An additional 50-foot buffer will be retained around the wetland during most of the construction activity in order to mitigate for any increased impacts from the construction activity itself. 1 ` • Disturbance to surrounding areas would be limited to only that which is necessary. • To the extent possible, soils would be exposed only during the dryer months. r • All stockpiled materials would be covered, secured and/or bermed. • Appropriate siltation fencing would be provided along on-site surface waters during construction. • A maintenance program would be developed and structural controls would be maintained on a regular basis. • Petroleum products and other construction materials would be handled with care to prevent ' their accidental entry into surface and/or ground waters. 7 I i Unavoidable Adverse Impacts • Development of impervious surfaces would increase the total volume of runoff from the • property. Mitigating measures would reduce off-site flows to levels acceptable to the city • ! and reduce the amount of urban pollutants in the stormwater discharged from the site. As with all development, runoff may still contain some level of pollutants such as fertilizer residues, some heavy metals and some oil and grease which is greater than existing undeveloped conditions and may contribute to cumulative downstream impacts. PLANTS AND ANIMALS Impacts • Clearing and grading associated with the Proposed Action would necessitate removal or modification to 10.9 acres of the vegetation that currently provides habitat for small mammals and birds. • • Human activity and the introduction of domestic animals tend to drive away indigenous wildlife. Displaced wildlife would likely not return to the site. Mitigating Measures . ~ F • The wetlands and their buffer zones would remain undisturbed, providing approximately one acre of continued habitat. • Site landscaping would be provided to augment vegetation not removed during clearing and grading activities. Six acres of the site would be included as upland landscaping and open space. Unavoidable Adverse Impacts • • Modification of forest habitat on approximately 10.9 acres. • Decrease in the fiumber of plant and animal species and change in the species composition as a result of the introduction of non-native plants and animals as well as human activities. • Possible elimination of wildlife species. i. NOISE Impacts • Increased noise levels would result from increased traffic volumes and construction equipment at the site. 8 • Increased human activity (use of power equipment such as lawn mowers and chain saws) would increase noise in the area. Mitigating Measures • Construction equipment would be well maintained and properly muffled. • Construction hours would be limited to coincide with the normal working day (7 a.m. to 7 p.m.), Monday through Friday only: no weekend work will be performed. • Nearby residents would be notified whenever extremely noisy work would occur. • Noise levels inside the newly constructed homes would be reduced by location, design, and use of adequate setbacks for buildings, use of insulation, airtight exteriors, and thicker walls, windows, and ceilings. • Recreation facilities, service areas, parking areas, and children's play lots would be located near the center of the site to reduce noise impacts on adjacent neighbors. • Acoustically designed fencing could be installed around the site to reduce noises. Unavoidable Adverse Impacts • There would be an increase in noise levels on site which would be primarily related to motor vehicles. LAND USE Impacts • The increased density (approximately 17 dwelling units per acre) that would accompany the ; Proposed Action would result in increased levels of human activity, noise and movement within the neighborhood. Mitigating Measures • Townhouse units located on the northern edge of the property would provide a degree separation between adjacent single-family homes to the north and apartment units to the south. They would be oriented in such a way so as not to be obvious from single-family homes to the north. • A wider area of natural vegetation could be provided to act as a visual screen and greenbelt between the proposed units and existing single-family homes to the north and east. A wider landscape buffer could provide a better transition zone for adjacent single-family uses and a more attractive environment for on-site residents. - 9 • Bulk and scale of buildings could be reduced by construction of smaller buildings or other reductions of density. Or conversely, larger buildings could be more tightly clustered.and moved further to the south to provide greater distance between more intensive land uses and single-family uses to the north and east of the site. • In order to comply with GMA, Renton would establish municipal service standards for existing population and require mitigation fees for services directly impacted by population growth. Unavoidable Adverse Impacts • Any construction on the site for urban uses would result in some permanent loss of existing open space and natural vegetation. • The site would be permanently transformed from an undisturbed natural area to a developed area. AESTHETICS Impacts • The visual character of the site would be urban residential rather than natural woodland, although some natural vegetation would remain in the wetland areas, perimeter buffers and ' p trail corridors. Mitigating Measures • To the degree possible, natural vegetation would be retained and dispersed throughout the site, especially within the trail corridors. • Natural vegetation would be maintained and augmented with supplemental plantings in ' ,! perimeter buffer zones ranging from 10 to over 100 feet wide to visually screen more intensive development on site from adjoining uses. • Buildings and landscape buffers would be oriented to screen views of large buildings from single-family homes. • Height, scale and bulk of buildings could be minimized to be more consistent with surrounding low-density development. Or conversely, larger buildings could be more tightly clustered and moved further to the south to provide greater distance between more intensive , land uses and single-family uses to the north and east of the site. • Building materials and exterior colors could be used that would visually minimize the bulk and scale of buildings. 10 Unavoidable Adverse Impacts • The site would change from a woodland environment to urban residential as development L- occurs. LIGHT AND GLARE Impacts • • Development of the site would introduce artificial lighting from streets, buildings, and parking areas. • Illumination from vehicles moving through Forrest Creste at night would be discernable off-site. .• There is the potential for glare from the multi-family units if they are painted light colors and are not effectively screened with vegetation. Mitigating Measures • Buffer zones of natural vegetation between the site and adjacent properties and roadways would reduce light impacts. • The design, location, and type of lighting would be such that the range of illumination and glare would be reduced while maintaining desired light levels. 1 _! • All streets and parking areas would use low-level, non-glare lighting. Unavoidable Adverse Impacts r • New sources of light and glare from the proposed development would be introduced to the east of Duvall Avenue NE as a result of vehicles and human activity. PARKS AND RECREATION Impacts • Increased population from Forrest Creste and other proposed developments in the immediate area, would result in the need for additional park space and recreational facilities. • Under the No Action Alternative, if the site were to remain undeveloped, it could be a potential park site. 11 Mitigating Measures • The Forrest Creste proposal includes construction of a pool, recreation building, sports court and two children's play areas on site to reduce the impacts to public facilities. -' • • The developer would contribute impact fees of$175.00 - $180.00 per apartment to mitigate for park land acquisition necessary to accommodate new residents. • Organized on-site recreation programs would be provided. Unavoidable Adverse Impacts • None are anticipated. TRANSPORTATION Impacts • Traffic volumes would increase by five percent or more at five signalized intersections due to the Forrest Creste proposal. • The proposal would generate approximately 1,235 daily, 104 a.m. peak and 137 p.m. peak trips. I • Based on the city's standards for analyzing intersections (Policy Guidelines for Traffic Analysis of New Development), construction of Forrest Creste would cause only one intersection (NE 4th Street/Union Avenue NE) to exceed acceptable levels of service. Forrest Creste would be required to provide its proportionate share of the cost of improving the level of service at this intersection. • Mitigating Measures • Creation of circulation elements (per City recommendations) to mitigate traffic impacts including: . Eliminating the northernmost driveway to Duvall Avenue NE. Providing additional right-of-way on 140th Avenue NE. Providing a second access on NE 6th Street (SE 124th Street extended). Constructing the roadway to half-width from Duvall Avenue NE to the end. Providing additional eight feet of right-of-way on Duvall Avenue NE and installing a left turn lane. Providing an additional emergency access in the northeast corner of the site. • • The signal timing could be revised at NE 4th Street/Duvall Avenue NE, NE 4th Street/Union Avenue NE, NE 4th Street/Monroe Avenue NE, NE 3rd Street/Jefferson Avenue NE and • 12 NE Sunset Boulevard/Duvall Avenue NE. These intersections would also be monitored to provide improved traffic signal operations. • Since the Forrest Creste site affects traffic in the East Renton Transportation Benefit Zone, the applicant could be called upon to participate in the Zone by contributing approximately $153,000 to help fund proposed roadway improvements in the area. • Adequate on-site circulation facilities for handicapped users including parking spaces, ramps, and turn-outs would be provided at appropriate locations. t_. • A school bus stop near the neighboring Orchards or Forrest Creste properties would be installed. • Traffic signal timing adjustments at signalized intersections would be an ongoing process. L. • On-site circulation amenities, such as sidewalks or pathways, would be provided to aid pedestrian circulation, especially school children. • The applicant would notify METRO of their proposals so that bus service could accom- modate the development and the potential for constructing a bus shelter near the site could v1( be considered. Unavoidable Adverse Impacts • Forrest Creste and other proposed developments in the study area would add traffic to the existing street system. • r' PUBLIC SERVICES i Impacts Police • Upon completion and full build-out, the Forrest Creste proposal could generate an additional 278 calls for service per year. • • Other proposed developments in the surrounding area would also require police services and the cumulative demand could impact the Police Department. Fire • Upon completion and full build-out, the Forrest Creste proposal could generate an additional 20 calls for service per year. • Renton Fire Department staff indicated that response times to the development would be between five and a half and six minutes, which would not be considered adequate. 13 • Response to medical emergencies would be provided by the Renton Fire Department. Acceptable response times for emergency medical response would be under five minutes. Response times to the site currently exceed five minutes. Schools • Upon completion and full occupancy, the Forrest Creste proposal could generate an additional 81 students. • Other proposed developments would also generate students and the cumulative effects could impact the District, particularly at the elementary school level (grades K-6). Mitigating Measures Police • A Police Department mitigation fee is collected upon issuance of Certificate of Occupancy ' and held in a three-year bond. The Police Department uses a formula to calculate the i amount of money necessary to mitigate impacts resulting from proposed apartment developments. The formula is based on the difference between the average number of calls which could be expected and the worst case number of calls which could be expected. The resulting number of calls is multiplied by $75.00 (the average cost for responding to a call) to determine the amount of the mitigation. In the case of the Forrest Creste proposal, the one-time fee would be $10,200. The mitigation is collected when the Certificate of Occupancy is issued (Renton Police Department, phone conversation with Penny Bryant, July 9, 1990). • The Forrest Creste design would incorporate crime prevention measures such as fences and vegetation around property boundaries locks and security systems on housing units, lighting for parking lots and buildings, and organized neighborhood block-watch programs. Fire • The Forrest Creste design would incorporate fire prevention measures such as smoke detectors and sprinklers in all apartment units, fire hydrants throughout the site and access to the site via paved, public streets constructed to allow easy access for emergency vehicles. • Restricted access for emergency vehicles only would be provided at 140th Avenue SE. • In general, the construction characteristics of the proposed development would tend to reduce the occurrences of fire on the site as compared with developments built in the past when I! construction codes were less sensitive to fire safety. • In cases of cumulative emergencies where the City's firefighting resources were exceeded, a mutual aid system with surrounding fire districts from King County, Tukwila and Kent would be called upon. 14 i r-� r _ • The City recently adopted a fire mitigation fee of $388.00 per multi-family unit. Forrest Creste would contribute $77,600 to mitigate any fire protection-related impacts. Schools I~" • The District could purchase, lease and/or construct portable classrooms, to accommodate cumulative enrollment increases from Forrest Creste and other nearby residential developments. This option provides the maximum flexibility to respond to shifts in the $ number of students at different grade levels. • The applicant could be called upon to contribute his fair share in School District improvements/funding systems (e.g. Improvement Zones). Unavoidable Adverse Impacts Police • None are anticipated. Fire • None are anticipated. r-- 1 'I Schools • The most significant impacts resulting from the proposal would be at the elementary school level. The School District currently does not have a strategy to fully mitigate these impacts. UTILITIES r Impacts. Sanitary Sewer L • The current sewer capacity in the study area is not adequate to serve the Forrest Creste proposal. Interim sewer improvements.are planned as a temporary solution until additional I ; sewer capacity is in place. L Public Water Supply • City Water Department personnel have,indicated that the impacts from the proposal would be minimal. The area of greatest concern is that adequate fire flows be supplied to the proposed development. r� • 15 k I N , Other Utilities - d • According to Puget Power personnel, adequate capacity exists to serve the proposed development and other developments likely to be constructed in the area. • U.S. West Communications would be able to adequately serve the proposed site. •a Washington Natural Gas would be able to supply service to the proposed site; however, the - existing mains would have to be extended. • Mitigating Measures Sanitary Sewer • Forrest Creste would share the costs of constructing interim sewer improvements with other developers and would be required to obtain a limited exemption from the existing sewer • moratorium. • The applicant would connect to and pay a proportionate share of constructing the new interceptor which would provide a permanent solution to wastewater disposal in the vicinity. Public Water Supply • The proposed development would provide adequate fire flows necessary for apartment units (2000-2500 GPM). These flows would be provided by water mains constructed at the developer's expense to City of Renton standards. Other Utilities • The developer would be required to provide trenching within the boundaries of the site where electrical cable would be placed. • The developer would be required to place conduit within the boundaries of the site and to any proposed structure. • Homes would be constructed to meet current energy code standards and to minimize energy requirements. • All utility lines would be placed underground. • Utility lines would be installed to meet the standards established by purveyors. • Space would be allotted in the service dumpster areas to provide recycling opportunities. 16 Unavoidable Adverse Impacts Sanitary Sewer • If the Proposed Action participated in interim mitigation improvements and eventually tied into the permanent interceptor, no significant adverse impacts would be expected. Public Water Supply • None are anticipated. Other Utilities • None are anticipated. r-- II 17 Section 2 Alternatives Including Proposed Action SECTION 2 - ALTERNATIVES INCLUDING PROPOSED ACTION 2.1 INTRODUCTION This chapter describes the Proposed Action (Site Plan A) and two alternatives: Site Plan B and No Action. Chapter 3 outlines errata in the DEIS. 2.2 EIS ALTERNATIVES Proposed Action - Site Plan A The Proposed Action for Forrest Creste includes two distinct components: a rezone from G-1 use (General Purpose) to R-3 use (medium density, multi-family) and site plan approval. The site plan proposes a 200-unit multi-family residential complex on approximately 11.9 acres, located in the City of Renton, east of Duvall Avenue NE, north of NE 6th Street (extended) and south of the Park Terrace subdivision (see Figure 2). The Forrest Creste development would be comprised of 200 units, 24 townhouses and 176 apartments. The townhouses would be located in five two-story buildings located along the north edge of the site. The apartments would be in 15 three-story buildings located on the remainder of the property. In addition to the housing units, the site design includes a recreation building, swimming pool and a sports court located in the center of the complex. Two children's play areas would be located to the east and southeast of the recreation facilities. A trail system that would integrate the residential units and recreational features is also planned. Also, a landscaped buffer, ranging from 20-40 feet, is planned for the perimeter of the property. Two wetlands identified on the site would remain in their natural state. The large wetland (0.61 acres) in the southwest corner would have a 80- to 100-foot buffer and the small wetland (0.03 acres) in the northwest corner would have a 40-foot buffer. These buffer areas would retain their existing vegetation. Biofiltration swales (to remove sediments and impurities) and level spreaders (energy dissipators) would discharge the site's stormwater from detention vaults to the wetland in the southwest corner. The site plan proposes primary access from Duvall Avenue NE with emergency access only from the extension of SE 140th Street. A 30-foot road dedication (NE 6th Street) is proposed on the southern edge of the site and a 25-foot setback parallels this dedicated right-of-way. A second access would be gained if the NE 6th Street extension is constructed. No buildings or parking facilities are proposed in this area. The proposal will provide parking for 350 vehicles. This EIS also evaluates the potential environmental impacts of two alternatives to the Proposed Action: Alternative 1 - Site Plan B and Alternative 2 - No Action. 18 • ��-138? Vp N E SE • -- -- 0 --� AVENUE to ' pUVAL �-_°.•1 00'• -- 19 N00°00'26'E 156.43' - ..WW .. L_34. __ -- . .6°58'+3E- 2 56-- _ ^' A AND At2 _ �(� J b00 OO 03 n�cr�, _ LAND4CJ�PC 6UfFER `•/ I • N00°01•1TE 235.93' >^ _ —A_07°00',°� i 2.00'L=2^J,1 .. ��') - A 11,011P et I- . •--------4-----,--=--a---•-••• 14101 : •-:II. III* WETLAND x1 r ` �`� I �jll I N i 0j-ro loci ' I / - .s-71�' _ 14) VCa i •IL jp. os %�, 1 t �\ g 138TH-PLACE SE y�� i...;...; ‘10 0 '011, . 1 fie ... : . ....1 . ;. ......, ,u, - _ 4 41‘11V/ --- ----r- , x • ,,., ,,, -_‘• -,_------„---121W-Iviii. - _. 1- 1,---- #' .:. -.. A •- --..-,• .., i * ",. - • •:•.:1161- 61. 1P'..', . IjiiYllcf r. �a / ,a ' 1 " - .; ll Or 01.Ilt itAk4 . :-AORIP/If,4V ' _., lik \ \\ tr,11) oh --, -,...„ . , ,... lllU ®rn i ` p Park Terracejai' . \ /u� _M-- \ �,i— �iP "' - = Subdivision pETENTION 1 \_�h1 � "._ _, 111 ml ` '_ 7 3 `1 :: __: .\lam; 1 ' )&, J /r C' • - I 114 %1‘k 4\ .>•'')''' Y • .... . , _ -- ....4, ..; - e-..„- itif. , , 1 , • . 1 ( ItliPreft. ..C... - - ' /" �• • C• .: ' �. fe . ,� - (_ ri. . , ,411*.b... .. . � LPr 4PE e� OW liv AM', •:,44‘. 111 :' ". . I c 11111. ` If . _�_ .!r z iCD ijw I di ' w. Alio -- '` i Illi7.!,..., �. .7RNL -\ le II I . -� I I tII 111171;L _ -- cn �� - , ! I - .ptiN , Wwy Fli—I400.°08.57-E 23 gat, IF& __• :,, -1. II - ,�. ei)r.* 101-14-J1 ' \._____ ----'----- � _ III l� M. III I G, ,= _ ., M �I. '1 Izmir• • - fry' _ o z 1 -Cr�ICREaCNGY Ac.pess i-1 140TH AVENUE SE 30r DEDICATION ---LA4403GAPE 6UrreR N00°08.57'E 807.34' 00' DCCcorrioN Source:Johnson Braund Design Group,Inc.Seattle, Washington.Dated October 15,1991 0 80 160 FORREST CRESTE Renton, Washington Scale in Feet -' • E PACIFIC " Proposed Action .19 _J Figure 2 Alternative 1 - Site Plan B Site Plan B retains the density of the Proposed Action but offers an alternative site design (see Figure 3). For example, under this alternative, the configuration of the townhouses along the northern property edge would be altered and the units would be regrouped. The entrance to the site would be moved approximately 200 feet north. Recreational facilities and a children's play area would be provided in the northern portion of the property. The configuration of the 15 three-story apartment buildings would be changed as shown in Figure 3. The building design, height, and building materials would be the same as the Proposed Action. A large open space would be retained in the southwestern portion-of the site and both wetlands would be preserved and buffered. No trail system is proposed under this alternative. A 30-foot dedication for NE 6th Street would be granted. The site design includes parking for 350 vehicles. Parking would be located in front of each building with the exception of the townhouses. Access to the proposed site would be from Duvall Avenue NE with emergency access only from SE 140th Avenue SE. If NE 6th Street is extended, an additional access would be provided to the development from the south. Alternative 2 - No Action Under the No Action Alternative, the proposed multi-family development would not .be constructed. The property would remain in its natural state. Zoning would remain G-1 since no other development proposals are pending. However, pressure for development of the site would likely continue. This alternative would allow subdivision into a maximum of 14 lots and development of single- family housing at approximately one-acre densities or other semi-rural uses. Should single- family homes be built, subdivision and site plan approval would be subject to SEPA review. In addition, the City of Renton would require a drainage plan, clearing and grading permits, wetlands protection, and building permits normally associated with development. • I 20 11 • E DU'/A�� AVENUE NE. o -- -- 0 -�__ pVENUEs• �� 138th ��_ , \ -01°152 _ --it R=1558.00 ,� 28'E 158 _ /� No8°56'43'W. 214.5r— _ �114111144. 1�,) D �� ',W_etland ,, I 07000.00•R=1642.00 L-200.61' f� rx1111 YCC.' IC7N4 /�\Ik4I ''' �� _ . N00°01'17T 235.93' n= � TaF�•!MPdIV ,,-. ` .i '`x:. .. , - , :•,,,-- • --I �iOPILTR/'�I -�'�r `�, 11, •-� •„ �• �` �' �y�. 1� ,° Writ • Ins-a.e �,r1 " � 11 ,�t —4, nvi iii: io Wetland 1 �,,.;a:� �'', ;. '+ l 111 '. °,C0--- ''Itt, vorilli V li/ i.,:ter—: A,/ r) ( .......q....,,....::::•_:,:•:.,.,-- T-- - 7 1_, •'• • ` ` �� �•�.11 1C � �� àI0138thPLE SE �' , � �J o d �. ♦i.: ;.: _1 .fir%40:4Ask `lta Fa. . ., -,!!mm.11, PAI . -irto mil at. "° l�, ` 0ti n.t,k , ';.►' `` mot, ! ' .taa. !,: m 4kj71-, cam'l • :: .;►r. 1 bi k,; .1 Si.d..o,,7.14 2,1\1:10P1,..1.1:•,i Ar..,e( ; \ ;�� ` ,t,.`7► ;, i s .��• rt M o w -.e 1).7):••,•,x.O ;<<< ,,:a:::.-_s:.i,el ; i •end 7 .i _ ;, :� -. . r r/ . f9 ��\ice..; �,!'��.� l�L` 51 % ���.- M ;' , 4 /'T ^C�CIFJTINCII.(W.4. .._'..i/ ,14,--tt-,°-.F 4.,,/.ZI',F1'l.'-.l..._R 9.,,-...4\1.11i-:,;1;t,• :1 AID :'C ►I 1� �) �� oV !y'-, .• �- '~ .■� �R CV CIL `, g1 . l _ , 1`m`,a , 4 °•a � ©t ,1 ■r g (1`/rlcrL) ,„ 4,0 MC' iM-!� i „I-G o ; t° %_I i� „j�I .� �r !I lam:'; _ I``i ; - aoPlLrRcnoLl C vl' C� l •, ;.• 1�ai►iv;1P':7u�� . - i+ -.. -, w;, •.,.. - 4W\ - - •)1:11Y.41 :v;,;,-/..,.— _,:.----i __, ' '' ta''. 1. , ti-lci , i Iry , / ,;.{.,.s:J•im 0 1.\\Ne r,'!/".e._1,:7::. --'- -,..--- )110.7p, "7 di I I p 1 °'--1 t , ,. 7''-' 0, --.• °" ��/ �.al Y &.••• • . • .6,. aft ` ` , p., ,..•08'STE 23.Cfr r. • i i .,,.t ,-- /-.. '1.4,::,-- - -,..,, _mat vikA-541 I ,,3 .-...i .:;..- io, • . . 4,„„, ,, g- /' , 10, lift I \',....i,',.,..dfir", ..,,,d7wk. , -;igrA; A .4 v AO-v7:7,•T•"*• ,____------ Ifutiiheiggir.; g ' � I w � i pr , � � � ...- IRAINII °'. 4 9 A %id N'"Alori#k 4 Ilik ' .-: - . 1:1 .,,,,if ,,c LN i; I �4fell, , � r On?. 140 . '.. .41‘"Ltt.:.°. ' '.*.'. . APlitaliff p ��N�i w Maiii 1 I �^ ,� 1,%1% \ ~; tf/ �r 'i'✓'r. r GGUIUTIOhI k.. 11-Itir-Aittati:t_irigibb&° °-° 140th AVENUE SE I00 • Mo• \800°08'57M 807.34' -- ' -- - 11 Source:Johnson Braund Design Group,Inc.,Seattle Washington.Dated April 26, 1991. q 80 160 • FORREST CRESTS Renton, Washington Scale in Feet N' Alternative 1 Site Plan B I PACIFIC • 21 Figure 3 Section 3 Errata To The Draft Environmental Impact Statement SECTION 3 ERRATA TO THE DRAFT ENVIRONMENTAL IMPACT STATEMENT This section contains corrections to the Draft Environmental Impact Statement. Some of the corrections were identified by agencies and the general public during their review of the document. Other corrections are- a result of new of more current information that was unavailable when the Draft EIS was prepared. DEIS Page Reference 1. (23) Amend the third paragraph under 'Proposed Action', last sentence as follows: "Proper erosion control prior to and during clearing and grading activities would minimize the potential for sediments to impact wetlands and or off-site areas." 2. (25) The document should read that the City of Renton is presently classified as 'non- attainment' for federal air quality standards of monitored air pollutants. 3. (29) Amend third paragraph, last sentence as follows: "According to Renton's wetland ordinance, Wetland 2 is exempt from regulation since the minimum size for wetland regulation is 2,200 square feet, and Wetland 2 is 1,307 square feet." 4. (32) Amend first paragraph under 'Surface Water Quality', last sentence as follows: "Approximately eight percent of the site, of which one percent is wetland buffer, would remain in natural cover." 5. (34) Amend last paragraph under 'Wetlands' as follows: "Since these buildings would be apartments, disposing of garden and other waste materials would be the responsibility of apartment maintenance personnel. Recycling of these materials would be recommended." 6. (35) Amend first sentence under "Alternative 1 - Site Plan B' as follows: "This alternative would result in impacts similar to those of the Proposed Action except that approximately 68,932 square feet(1.58 acres) would be left in natural vegetation as wetland buffers. 7. (38) Amend last bulletted item under 'Mitigation Measures' as follows: "Since these buildings would be apartments, developing and organizing a recycling program for disposing of yard wastes could be done by the apartment maintenance personnel." 22 � I i 8. (44) Amend the paragraph under 'Unavoidable Adverse Impacts' as follows: "There would be loss of habitat and subsequent loss of wildlife on more than 90 percent of the property." Amend the second paragraph under 'Noise, Affected Environment', fourth sentence as follows: "More simply stated, an increase of 10 dBA is equal to a sound twice as loud." 9. (66) Amend the paragraph under Existing Traffic Volumes and Levels of Service, third sentence as follows: "NE Sunset Boulevard is the third most traveled road, with traffic volumes of 18.200 ADT. I I 10. (67) Amend Table 1 as follows: I _ I Row 6, Column 3 - replace 22,400 with 18,200. . I Delete Row 7 Bronson Avenue NE. '11. (71) Amend Table 3 as follows: Row 6, Column 2 - replace 20,000 with 22.400. ' Delete Row 8 Johnson Avenue NE. 12. (78) Amend the first paragraph under 'Fire, Affected Environment', second sentence as follows: "First response service for the Forrest Creste site would be provided by Fire Station #12 (Renton Highlands) located at NE 9th Street and Harrington Avenue NE (see Figure W." (78) Amend the first paragraph under 'Fire, Affected Environment', last sentence as follows: "Any response time under five minutes is considered acceptable (Jim Matthew, Renton Fire Department, personal communication)." 13.. (Page 5 of the Public Meeting Minutes) Amend the second paragraph, fourth sentence beginning "In this northeast area..." as follows: In this northeast area, at the present time, the Planning Commission and City Council are considering several plan options. These include a Plan similar to the one in place now, a Plan which directs growth to the center of the City and a Plan which directs growth to infill areas throughout the City. At this time it appears the site could be included in an area which would permit multi-family housing. The density level which would be allowed under 23 a new Plan is uncertain at this time. However, the Plan would be compatible with the GMA, which designates Renton as an urban growth area. 14. (Appendix H) Insert the following graphic after Table H-7 page H-13. • 24 • �� ICING COUNTY c9FF,Oqt Not to Scale O el405 RENTON CITY LIMITS 2.1% A�� ��•�/O N 1 w ui ....i...._ ._, < O z . 1 0.44 /° a NF -s01\„[..../....- - / "' s �- N.E. 12TH ST. ' 4 PARK DR. 11 • ��� N.E. I • 10TH , 1. . c/ ST: ui LL+ .2 z i� • h N.E. a 7TH ST. ' - w = u; 0 z►.— z S.E.122ND ST. = Z = r= i- i'l yin 1� PROPOSED SITE c 2 /N.E. 4TH ST. S.E. 128TH ST. h w ~ �,,= SA / r 3pt0 Enbu44 I 7.9% 1114) \ 1.1% 1 z L-il c., 4, 1 A( F` -16 Fy hwy sR-16g Legend 7.9% Percent increase during PM peak hour due to Forrest Creste Forrest Creste Renton. Washington Project Traffic as a Precent of PACIFIC Existing Traffic Volumes Figure 4 1 Section 4 Comment Letters and Responses SECTION 4 COMMENT LETTERS AND RESPONSES Section Four contains copies of all written comments received by the City of Renton during the comment period. The comment period began on May 4, 1992 and ended on June 4, 1992. The agency comments appear first and are numbered A 1 through A 46. Comments received from the general public are presented second and are numbered P 1 through P 50. Responses to the comments are presented to the right of the letters. The Minutes from the Public Meeting held on May 21, 1992 follow the comment letters and responses. During the project, issues were raised regarding the relationship of Forrest Creste to the Growth Management Act (GMA), resulting Countywide Planning Policies, and the update of the City of Renton's Comprehensive Plan. By way of background, Forrest Creste was originally proposed in 1988. The EIS was required in November 1989 and the Determination of Significance was issued in January 1990. Scoping for the proposal was completed in June 1990. y The Forrest Creste EIS has been prepared following SEPA Rules which require that alternatives be defined during the scoping period. Scoping can be expanded by the lead agency only if substantial changes are made to the proposal or "if significant new information or circumstances arise which would cause the proposal to result in probable significant impacts (WAC 197-11-408 [5]). The scope of the EIS for Forrest Creste was modified in early 1991 when wetlands were found on the property. _ Under City policy, the regulations and programs which are in place at the time that the scoping occurs for an EIS (in this case, 1989) continue to be valid for the duration of the environmental review process. Thus, the proposed development is being reviewed under the current City Comprehensive Plan (initially adopted in 1986). Additionally, Renton City Council Resolutions 2878 and 2911.identify Forrest Creste as one of several projects which are intended to be reviewed under the existing Comprehensive Plan. While every effort has been made to include changing City programs and policies, SEPA requires that the "rules" for the environmental review remain consistent over time. The existing City Comprehensive Plan would permit the proposed density level for Forrest Creste, which is 17 units per acre, as presented in the Draft EIS. Specifically, the development designation for the Forrest Creste site is low-to-medium density multi-family housing, with a potential maximum density of 12 units per acre (for the portion of the site which is designated for low density) and 25 units per acre (for the portion of the site which is designated for medium-density use). This proposal is generally consistent with the Urban designation established for Renton under King County Growth Management Guidelines. Upon adoption of the Final EIS, a mitigation document will be developed. Similarly, at the time' of site plan review, city staff will establish conditions for development as dictated by the Site Plan Ordinance. The mitigations and conditions will be related,to identified impacts and will address programs and policies that have been adopted since the EIS was started in 1990. Where appropriate, conditions may be recommended based on pending policies; however, compliance 26 it with these recommendations would be voluntary on the part of the applicant, if the underlying policy or program has not been formally adopted by the City. • • ,' Jy ti . • 27 ' r rie, • • STATE OF WASHINGTON DEPARTMENT OF ECOLOGY Mail Stop PV-11 • Olympia. Washington 98504-8:11 • (206) 459,SO00 , June 2, 1992 Environmental Review Committee Attn: Donald K. Erickson 200 Mill Avenue South Renton, WA 98055 Dear Mr. Erickson: Thank you for the opportunity to comment on the draft environmental impact statement (DEIS) for Forrest Creste proposed by Ray LaBlanc. We reviewed the DEIS and have the following comments. A 1 Comment acknowledged. The city has a curbside recycling program in place for single 1 n mily homes. They are currently working on extending this program to include i for gle r The applicant should c with solid waste officials, garbage Thes, and units. It is anticipated that ee program wilol in pige s o end of 1992 earlyli 1993. m multi-family comprehes to locate recyclingt managementemntes that are availablet locally.ing The local comprehensive solid waste plan may identify recycling programs and requirements. 2. The apartments should be designed to accommodate recycling. Opportunities 2 A 2 Comment acknowledged. The mitigation measures included in the Other Utilities section for recycling aluminum, other metals, glass, newspaper, corrugated containers,p indicate that space would be provided in the service dumpster areas for recycling(page themtict, office paperul bead other materialsacco shouldlat be ts convenient aa throwing A them out. Space should provided to accommodate the storage of these materials both inside the buildings and at a centralized location outside the buildings. 3. During the construction phase of the project, we encourage the applicant to use products made from recycled materials wherever possibl and Products containing 1, ,; recycled materials include parking lot bumper stops, parkA 3 Comment acknowledged. Recommendation will be made to the applicant to use recycled landscape timbers and sign posts made from recycled plastic, rubberized asphaltmaterials to the extent possible. made with recycled tires, glassphalt made with ground glass, insulation and other er building materials. An inquiry to a building material supplier will provide information on what products are available and at what percent the products contain recyclable materials (the higher the better). 4. During the landscaping phase of the project, we recommend using recycled A 4 Comment acknowledged. Recommendation will be made to the applicant to use recycled )1 materials. Compost from recovered organic waste can be used as a soil amendment A materials to the extent possible. in landscaping. Chipped woody debris can be used to mulch ornamentalabel ds, to s. We control erosion on slopes, and as a base for pathways and jogging also recommend that organic landscaping debris genrralnd on-^ire be used on-site. we encourage the applicant to n �1 A 5 Comment acknowledged. Recommendation will be made to the applicant to reduce and 5. During the construction phase of the project, recycle construction debris and to reduce construction waste whenever possible. recycle construction debris to the extent possible. • Environmental Review Committee June 2, 1992 Page 2 6. The Department of Ecology's Waste Reduction, Recycling and Litter Controlf A () A 6 Comment acknowledged. Program staff are available to assist in developing or implementing waste reduction and recycling programs. If you have any questions, please contact Mr. Tom Spille at (206) 459-7060. Sincerely, • M. Vernice Santee Environmental Review Section MVS:bjp 92-2744 • cc: Tom Spille, NWRO Janet Thompson-Lee, NWRO 1. Washington State District I Department of Transportation '4-;''5 S'"Q•" ' °'1:l - Duane Berentson Secretary nl rrancn(nan, runt) PCANNUir.fir•..,i�N •JUN08 June 4, 1992 Mr. Donald K. Erickson, •AICP Secretary to the ERC Planning/Building/Public Works Department City of Renton 200 Mill Avenue South Renton, WA 98055 Forrest Creste DEIS Review Comments Dear Mr. Erickson: This letter is in response to the Draft Environmental Impact Statement (DEIS) issued by the City for the proposed Forrest Creste development. In addition to the rezone of the 11.9- acre site from general purpose (G1) to medium density multi- family (R-3), the proposal includes the construction of a 200-unit multi-family apartment complex. The project site is located east of Duvall Avenue N.E. (138th Avenue S.E.), north of N.E. 6th Street (if extended) and south of the Park Terrace subdivision in northeast Renton. A recreation building, swimming pool, sports court, and two children's play areas are also part of the proposed complex. The DEIS examines two site plan variations for the proposed alternative and a no action alternative. Our comments regarding the DEIS for this proposal are as follows: 1. The Land Use section of the DEIS indicates that the proposed action is consistent with the intent of the A 7 The Forrest Creste site appears to be within the Renton "Major Center" in the Vision 2020 City's Northeast Quadrant Comprehensive Plan and King A 7 Plan. Improvements to SR-900 and other roadways in the vicinity are planned or proposed County's Newcastle Community Plan. No mention, however, to meet the needs of anticipated growth. Forrest Creste is consistent with other plans as it was made of the relationship between the proposal and aims to increase density in an area designated for urban uses. Vision 2020, the adopted regional transportation plan and development strategy. The relationship to the State's Growth Management Act (GMA) was not discussed , A 8 It is not possible to discuss the GMA requirement for the concurrency between land use and other than to indicate that zoning plans must now be 8transportation elements with respect to the Forrest Creste development as the details of this requirement are not finalized and will not be finalized until mid-1993. Mr. Donald K. Erickson —Forrest Creste_DEIS -___�-�_ ._____ _ ._ ___ June 4, 1992 - .__ - page 2 A 9 Comment acknowledged. The 1990 traffic volume listed for NE Sunset Boulevard in Table consistent with comprehensive l for concurrencY 1 (page 67) should be 18,200. This is consistent with the volume for the same roadway provisions of GMA is the requirement between the land use and transportation elements of listed in Table H-1 (page H-5). The 1993 traffic volume for NE Sunset Boulevard should comprehensive plans. The DEIS should include more be 22,400 in both the text and Table 3. discussion of the proposal's relationship to the GMA and Vision 2020. A 10 The city is aware that by using its policy guidelines, an intersection with an unacceptable level of service would not be evaluated if the proposal's entering peakhourtraffic rhave idn increase total intersection trips by t percent or more. Many jurisdictions 2. The Transportation section of the DEIS contains some increase in their impact guidelines. necessary inconsistencies in the traffic volume data for N.E. in order to thresholds indetermine the appropriatetrafficmp study analysis yea and number These stesio thresholds to are analyzedcss traffic- Sunset eragevard y 900)traffic In ) isse 1 (page 67), the the 1990 ADT is listed as for every project. Section 2 of this document includes an illustration(Figure 4)which shows 1990 average daily aref Hi5) (ADT) listed as 22,400, but in Table H-1 (page (Appendix H) the percent increase for area intersections as a result of the Forrest Creste development. 18,200. Since the Traffic Impact Analysis 1993 is the basis for the Transportation section of the DEIS, A 9 PM peak hour level of service(LOS)calculations were compiled for existing(1990),this inconsistency should be clarif ee ed ADT add20,000 Table 3 (page 71) lists the 1993 prof without project and 1993 with project at the northbound and southbound ramp intersections for N.E. Sunset Boulevard with Forrest Creste of 1-405 and NE Park Drive. The volumes for 1993 without the project were calculated by constructed. The last wouldouldraph on page 70 states that compounding existing (1990) volumes by an annual growth rate of 3 percent. Traffic generated by the project was added to the 1993 without project volumes to arrive at the 1993 1993 N.E. Sunset Boulevard have an ADT of 22,400 n with project totals. The LOS calculations are summarized in the following table: resolved. Such inconsistencies need to be appropriately resolved. Existing 1993 W!O I 1993 with 3. In determining which area intersections to evaluate, the (tuns) I Project project traffic study for this DEIS followed the City's policy ' Guidelines for Traffic Analysis of New Developments. I(1990)Delay ILojectOS I ay ILOPojectS I The threshold for analysis of signalized intersections IIntersectton under these guidelines require that there be a five percent increase in peak hour traffic entering the intersection before that intersection is evaluated in NE Park D 1 C 16.8 D rive/1-405 NB Ramp C 16.8 DC 1 20.1 27.2 1 C 21.13 the traffic atYD 27. ud . Under such guidelines, it is A (() possible that an intersection with an unacceptable level Park Drive/1-405 SB Ramp of service (LOS E or F) would not be evaluated because a project's traffic volumes hour did ntersec volume by five intersection's entering peakThe table indicates the LOS for the ramps does not change with or without the project. Since percent. The only state highway intersection denoted as the level of service is D or better for both intersections,and is therefore considered to be an affectedev (SRin900)/DuvallDuan in the DEIS is the N.E. S. No acceptable under city policy, no mitigation should be required from the Forrest Creste Boulevard 900) Avenue N.E. intersection. No development. other intersection along SR 900 was evaluated for level of service or safety/accident concerns, even though 20 agreement at •percent of the proposal's generated trips are A 11 foredeveloper trafficlimpacts on state ihighways(ire.,SR 900 and 1-405).ng for reciprocalThe GMA goal igation collection distributed to SR 900. concurrency may address this but will not be final until mid-1993. The SR 405 corridor is well known for its heavy congestion during the peak hours. The traffic impacts A j ( of this proposal on the SR 405 interchanges were not discussed in the DEIS, except to indicate that Mr. Donald K. Erickson Forrest Creste DEIS June 4, 1992 Page 3 • improvements to SR 405 were "not the responsibility of the developers" in the East Renton Transportation Benefit Zone (TBZ). The cumulative traffic impacts to SR 405 and other state highways from development in Renton is of concern to us. It should indeed be the responsibility of developers to appropriately mitigate • their traffic impacts to state highways as well as the local roadways. Without the cooperation and assistance of developers, local agencies, and state agencies, the GMA's goal for concurrency in the region's land use and transportation plans may not be achieved. 4. To avoid overloading the roadway network with single occupant vehicles (SOV's), higher density residential developments like Forrest Creste need to be located and designed for compatibility with transit service. Site plans should provide for safe and convenient access to A 12 The Draft EIS includes mitigation measures to encourage transit usage such as: notifying transit facilities or include them as part of the site A 12 Metro of the development so that bus service could accommodate it; considering the design. Transit stops and pedestrian pathways are construction of a bus shelter near the site;and on-site walkways or pathways for access to examples of design features that could make a transit facilities. As required by city code the development will construct a sidewalk along development more transit compatible. Every effort its Duvall Avenue NE frontage. The mitigation document that will be prepared by the should be made to encourage transit utilization in areas zoned for higher density residential and commercial Environmental Review Committee following adoption of the FEIS,will also address transit impacts. uses. 5. As a mitigation measure for the proposal's traffic A 13 There is currently no interjurisdictional agreement in place that provides for the collection impacts on SR 900, we suggest that the developer of reciprocal mitigation fees for state highways. - contribute a pro-rata share' of the cost of our future project to widen SR 900 from Duvall Avenue N.E. to SR A 13 90. Other developments that have a traffic impact on SR 900 should also contribute a pro-rata share of the cost to widen SR 900. Thank you for the opportunity to comment on the DEIS for the proposed Forrest Creste development. If you have any questions concerning these remarks, please contact my staff member responsible for reviewing EIS matters, Mr. David Oberg, at 562-4106. Sincerely, DONALD K. NELSON, P.E. Manager of Planning and Local Coordination DAO:ct 5/dofcdeis nr METR0 Municipality of Metropolitan Seattle bg4 2100 Exchange Building • 821 Second Ave. • Seattle,.WA 98104-1598 • (206) PLANNING DIVISION-_^ _ _ _ -- _ - - _ _ _ °FFIENT June 4, 1992 JUN 0 5 1991 City of Renton c/o Don Erickson, Secretary Department of Planning/Building/Public Works 200 Mill Avenue South Renton, Washington 98055 Draft Environmental Impact Statement File Name and Number: Forrest Creste/ECF:R:sA-093-88 Dear Review Committee: Metro staff has reviewed the draft environmental impact statement for this proposal and anticipates no signicante impacts to Metro's wastewater facilities. However, we Mwerhs the following comments regarding water quality and public transportation services. Water Quality Aside from Alternative 2, Alternative 1 - Site Plan B would have the least impact on water resources. In addition to the measures contained in the EIS, we A 14 As suggested,potential mitigation measures could include: recommend the following mitigation measures be required i 14 during construction of the proposed project: ▪ Disturbance to surrounding areas would be limited to only that which is necessary. ▪ To the extent possible,soils would be exposed only during the dryer months. - Avoid disturbing surrounding areas more than necessary. ▪ All stockpiled materials would be covered,secured'and/or termed. periods that • Appropriate siltation fencing would be provided along on-site surface waters during - If possible, avoid exposing soils during have the highest potential for erosive rainfall. construction. • A maintenance program would be developed and structural controls would be - Cover, secure and/or berm all stockpiled material. maintained on a regular basis. Petroleum products and other construction materials would be handled with care to - Provide geotextile siltation fencing along onsite prevent their accidental entry into surface and/or ground waters. waters. waters. - Develop and implement a regular maintenance schedule for structural controls, eg., filter fabric fences and stockpiled covers. - Handle petroleum products and other construction materials with care to prevent their entry to ground and surface waters. Don Erickson June 4, 1992 Page Two Information concerning water quality should be distributed to all home buyers in the proposed development. The • information should identify water quality concerns within local water bodies, the potential impacts of car washing and maintenance activities (particularly changing and disposing A 15 of oil), misuse or inappropriate disposal of hazardous household products, and inappropriate use of fertilizers. A 15 Comment acknowledged. Recommendation will be made to the applicant to make The information should include suggested methods for car washing, disposal of hazardous household wastes, use of information regarding water quality available to future tenants possibly through the leasing agent. fertilizers, and other household activities which could potentially endanger local water quality. • A 16 Comment acknowledged. Recommendation will be made to the applicant to inform tenants Home buyers should also be informed of the location and - about the location of native growth protection easements within the development. significance of native growth protection easements within or A 16 abutting the proposed development. A 17 Oil and water separators will be inspected and maintained on a routine basis by the maintenance personnel for the complex. Oil/water separators are proposed as mitigation for this project. The separators should be inspected and maintained A 18 Comment acknowledged. Based on review of the information in the Draft EIS and public on a regular basis. Surfactants (soaps and detergents) A 17 drastically reduce the efficiency of oil/water separators, and agency comment,the Environmental Review Committee will develop a final mitigation document which may result in modifications to the current proposal. At that time the and they should be prevented from entering areas connected to oil/water separators. committee could ask that a designated car wash area be included. This could also be I • addressed during subsequent site plan review. To protect downstream water quality, a designated car wash A 18 area, which is plumbed to the sanitary sewer, should be A 19 As required by city code,the development will be required to construct a sidewalk along its designed into the development. Duvall Avenue NE frontage. The design for this sidewalk could include a landing pad as suggested by Metro. Please call Barbara Badger, Metro Water Resources, at 684- 1231 with any questions regarding water quality. • Public Transportation - V. Metro currently does not provide transit service along Duvall Avenue Northeast adjacent to the proposed project site. The development could accommodate the addition of a bus stop if a sidewalk was included in the design along the • Duvall Avenue Northeast frontage. The best location for a A 19 bus stop would be 70 to 80 feet north of the project's . driveway. Walking from the proposed back units would be minimized from this location. The sidewalk should be eight feet wide or an eight by ten foot landing pad should be provided where the bus stop would be located. Doug Johnson of Metro Transit Service Planning may be contacted at 684- 1597 regarding this matter. The proposed project should include a Transportation I Management Plan that includes the following actions. • Don Erickson June 4, 1992 Page Three —® - Provide a free one-month bus pass totenants-at t e_._ 2O _ time of each new tenant occupancy (peakA 20 Transportation mitigation measures in the EIS include a Transportation Management Plan that zone). would incorporate the elements recommended by Metro. - Distribute site-appropriate transit and ridesharing information to new tenants and annually to all tenants. - Develop a site plan that shows how access to transit and ridesharing have been considered. Please contact Pam Chin,aMetro Market tDeDevelopment oPPlanner at 684-1767 regarading preparation ofa management plan. Thank you for the opportunity to review and comment. Sincerely, Gregory M. Bush, Manager Environmental Compliance Division GMB:pgg1552 • • IMPi i ' 1 , � - - � -- -- ` --' � --— ,i. ✓ i it S / Facilities & Operations Center i 2 s II 1220 North 4th Street,Renton,Washington 98055 I1 YptoNiN� N dt 3 oPAgno/ON 403 , �J N • - UN 05 z992 June 3, 1992 rT4:i,,,CIV� D Donald K. Erickson, AICP City of Renton Planning/Building/Public Works Department 200 Mill Avenue South Renton, WA 98055 RE: Draft Environmental Impact Statement for Forrest Creste/ECF;R:SA-093-88 Dear Mr. Erickson: Please include in the record the following comments from the Renton School District #403: • 1. The impact of this proposal on the School District as a whole will not be significant, but it will have an adverse impact at the elementarylev A 21 Comment acknowledged. n21 thee schooluthat would acconnlR,date these se of the over capacitY of Maplewood En ollmentecapacity A 22 Comment acknowledged. As the School District currently has no plan or program in place at Maplewood Heights Elementary is 588, we currently have 604 students to collect mitigation fees, there is no mechanism to require such fees of the developer. enrolled with 3 portables on site. I However,the developer could be called upon to enter into a voluntary agreement with the School District to provide land, fees, or other in-kind payment in proportion to the direct 2. That if additional facilities are required, the Renton School District A 02 such impacts from the development to the School District. would be able to assess impact mitigation (to be determined) developments. A 23 Comment acknowledged. See comment A 22 above. 3. That if this Development would require the reopening of previously closed schools, that the developer would be required to mitigate these A A 24 Comment acknowledged. The City will work with the School District to enable timely costs, to be determined at a later date. processing of all applications in a manner consistent with local and state regulations. ire the reopening of a closed 4. That ifthis development would Rentonrequ would A 25 The proposed development includes internal pathways and will be required by city code to school/s, that the City of said school/s. expedite any and all A build sidewalks the length of the property along Duvall Avenue NE. requirements for the opening , 5. That safety be a priority guide in this development for children's n ?5 • sake, i.e. walkways, bus pull-outs, appropriate signalling and crosswalks. erely, ick Stracke xecutive Director, Facilities & Operations RS:]d c: Gary Kohlwes Debra Aungst MUCKLESHOOT .INDIAN TRIBE FISHERIES DEPARTMENT 40406 AUBURN-ENUMCLAW ROAD - AUBURN. WASHINGTON 98002 (206) 825-7030 -FAX# (206) 825-9027 3 June, 1992 PLANNING CRY OF i ON Mr.Donald K. Erickson,AICP Secretary to the ERC AV 0 Planning/Building/Public Works Department 5 1992 ATTN:Lenora Blauman raft# 200 Mill Ave South e�yED Renton,WA • 98055 RE: DRAFT ENVIRONMENTAL IMPACT STATEMENT FOR FORREST CREST(ECF:R:SA-093-881 -A 26 Two options are available to reduce downstream impacts to Maple Creek associated with the Dear Ms Blauman: proposed Forrest Creste development: downstream improvements and/or increased • detention/decreased release rates. The City of Renton Storm and Surface Water Drainage The Fisheries Department of the Muckleshoot Indian Tribe has reviewed the Code(CRC 4-22)requires analysis of downstream impacts. This analysis and designation Draft Environmental Impact Statement for the Forrest Crest residential development. of specific downstream improvements or reduced release rates will be carried out during We offer the following comments which should serve to improve the protection already afforded the environment,and ensure that development does not preempt salmonid subsequent city review phases. City codes also require development to reduce peak flows restoration opportunities. to predevelopment levels. The code is based on the King County Surface Water Design Manual. 1. Affected Environment As a result of analysis of the environmental data that has been submitted for the Draft EIS The project site is located within the Maplewood Creek drainage basin; and public and agency comment, the Environmental Review Committee will develop a final stormwater will be discharged to Maplewood Creek. Currently,the lower reaches of • mitigation document which may result in modifications to the current proposal. As provided Maplewood Creek experience excessive sedimentation and flooding due to the for in state law (RCW 82.02.020 and RCW 43.21C.060), the mitigation document will cumulative impacts of small developments,lacking sufficient mitigation measures. A 26 Additionally,consideration is being given to relocating the lower reaches of address the direct impacts of developing Forrest Creste. The document will also address Maplewood Creek,and restoring a section for salmonid use. Therefore,the Forrest mitigation measures for Forrest Creste's proportionate share of cumulative impacts. Crest development must not cause incremental adverse impacts to surface water hydrology,that may impair salmonid restoration possibilities. During subsequent city review processes the applicant and appropriate city department will establish the specific stormwater management system for the final proposal. That system 2. Surface Water may include additional biofiltration, a wet pond and/or infiltration. Stormwater discharge(page 32)cause many of the adverse impacts observed in A 27 The city is familiar with the current surface water problems in the basin and the associated the lower reaches of Maplewood Creek: erosion,bank instability,and localized effects of urbanization. City code requires projects to mitigate the effects of increased runoff flooding. The proposed development will increase impervious surface area by approximately 4.9 acres(page 6). However,mitigation measures(page 36),designed resulting from increased impervious surface and land use changes attributable to the to prevent adverse downstream impacts,incorporate King County Surface Water individual project. If off-site impacts are identified during the project's site plan Design Manual criteria. Such performance standards will prevent downstream adverse approval/conceptual drainage plan review phase, the applicant will be required to mitigate impacts only if the following assumptions are met 1)the storm event does not exceed A 27 the off-site impacts by providing downstream improvements or providing stricter discharge 24 hours duration,and 2)the stormwater basin is empty when the storm commences. requirements on-site. By law, the city can only require those stormwater management It has been demonstrated by recent experience,and recognized by the Department of controls that are stated in its Storm and Surface Water Drainage Code. State agencies(i.e., Ecology,that using a 24 hour storm event to design stormwater basins produces Department of Fisheries, Department of Ecology and Department of Wildlife) have the - inadequately sized-basins which-fail to provide adequate downstream-protection-from-- authority to require more stringent stormwater controls than those required by the city if such increased runoff and associated impacts. controls are deemed necessary(see response to comment A 35). The developer would be required to comply with all applicable local and state regulations. q J ! , 1 t 1, ;� t. l 7 e r t n . - 1 t, -' _ - -)' 1_- -I - • • Additionally,the precipitation date used in the DEIS is for Sea-Tac Airport A 28 The reference in the Water;Affected Environment section to the precipitation at Sea-Tac (page 27). Local precipitation data should be presented in the FEIS,and if local storm I A 2 B Airport is intended to give the reader a general idea of climate conditions in the region. events are more intense,used to calculate required stormwater basin size. Precipitation data that was used to calculate the size of stormwater basins was obtained from the King County Surface Water Design Manual Figures 3.5.IC-3.5.1I. To assist the goal of preventing downstream impacts,we recommend the stormwater mitigation measures be strengthened to include: A 29 The King County Stormwater Management Division is currently using the HSPF model to (A) A continuous simulation model,such as Hydrologic Simulation Program analyze the Cedar River basin of which Forrest Creste is a part. The model is designed to Fortran(HSPF)should be used for the purposes of analysis and design. A 7 analyze large areas such as major drainage basins and its use on a site as small as Forrest day storm event and updated historical local precipitation data should be used to A �t� Crest would be inappropriate. calculate the required stormwater basin size. A 30 The city must rely on the requirements of its code for storm water design criteria. The city (B) Stormwater detention times should be a minimum of 24 hours for the 2 year,3 I A 30 uses the King County Surface Water Design Manual which requires that detention facilities day event. be designed for the 2-year and 10-year recurrence storm and that the 100-year storm be F indicates stormwater infiltration was not considered due to analyzed for downstream impacts. Storm water is to be released at the pre-developed rates. Finally. AppendixState agencies (i.e., Department of Fisheries, Department of Wildlife and Department of site unsuitability. However,page 36 states that infiltration may be used to control Ecology) could require stricter detention requirements such as those recommended if the increased runoff volume. Given that the cost effective method of reducing runoff A 31 q q volume is through infiltration,the FEIS should devote more detail to discussing agency deemed them necessary. During subsequent city review(site plan review/conceptual stormwater infiltration possibilities. drainage plan design),a more detailed downstream impact analysis will be conducted. The applicant will work closely with city agencies to design a stormwater drainage plan that will 3. Plants and Animals meet the city requirements including protecting downstream environments. There is little reference to the fisheries resources of Maplewood Creek,except A 31 The environmental data submitted in the Draft EIS and public and agency comment will that they are relatively unknown,and that the detention facility at the Maplewood Golf provide the Environmental Review Committee with information to develop a final mitigation Course may be a salmonid barrier. Regardless of the current state of the salmonid document that may include modifications to the proposed drainage plan. resource,the FEIS should discuss what impacts the development may have upon A 32 restoration and enhancement opportunities within Maplewood Creek. To ensure .restoration opportunities are not foreclosed,the FEIS should present some historical During subsequent city review processes the applicant and appropriate city_departments will data of salmonid use of the Maplewood Creek. refine the stormwater management system for the final development proposal. Infiltration could be considered as an option for reducing release rates from the site. The applicant's 4. Summary ability to use infiltration as a means of controlling stormwater runoff could be limited by the site's location within the city's aquifer protection area. In addition to downstream impacts, Incorporating stricter stormwater design criteria into the mitigations will help the city must also consider the impacts to its aquifer. prevent downstream flooding,erosion,and sedimentation,as well as not further A 33 augment cumulative impacts to aquatic resources. A 32 The Department of Fisheries has indicated that sedimentation problems currently exist If you have any questions,please call me at 825-7030. downstream of the site (by the golf course) as a result of years of development. Many developments contribute to problem. This sedimentation has caused the culverts in the area to be rarely passable. The Department has indicated that stream improvements are planned Sinc near the golf course to eliminate barriers to fish. Roderick Malcom If the downstream analysis conducted during subsequent review phases indicates that Forrest Habitat Specialist Creste contributes to the existing sedimentation problem,the development would be required to contribute it proportionate share to efforts to improve conditions. However,one applicant can not be held responsible for the cumulative impacts of years of development. According cc: WDF/Larry Ratte to state law,the developer can only be required to provide mitigation for impacts that result City of Renton/Dave Jennings • directly from his individual project. SWM A 33 Comment acknowledged. See response to comment A 30 above. • 2 . • CURT SNITCH � > Director STATE OF WASHINGTON DEPARTMENT OF WILDLIFE 16018 Mill Creek Blvd.. Mill Creek. WA 98012 Tel. (206) 775-1311 Or1'YO OOry1SbN AO June June 3, 1992 rrOfy JUN 0 8 1992 Mr. Donald Erickson `71 (,EtVFD ,Municipal Building, Third Floor 200 Mill Avenue South Renton, Washington 98055 RE: DRAFT FOREST CRESTE EIS, APRIL 1992 Dear Mr. Erickson: I have reviewed this FEIS and the following are my comments and concerns: A 34 The Environmental Review Committee will be analyzing all the data presented as part of the Draft EIS as well as public and agency comments and will be preparing a mitigation 1. We would recommend Alternative Site Plan B with changes to include the original wetland buffers that are shown on Plan A. The upland document that may modify the proposed layout. The modifications to the site plan could portion of Plan B could include the intermittent stream shown in include the preservation of the intermittent stream and its associated benefits to wildlife and Figure 6. This would protect the stream so it would continue to A 34 water quality. contribute biologically,benefit wildlife,and water quality. A 35 The Department of Fisheries did not respond in writing to the Draft EIS but has agreed that 2. We agree that'stormwater is an area of environmental significance the Department of Wildlife should be responsible for Hydraulic Project Approval(HPA),if and mitigating measures should incorporate the Department of required,for the Forrest Creste development. State agencies have the authority to impose Fisheries Stormwater Guidelines that include qualitybtration quantity swales. As headwater to Maplewood Creek, both water and quantity A 35 stricter stormwater management controls on development than those allowed under'city code. is an important issue since the lower sections of this stream supports cutthroat trout and coho salmon. A 36 The Department of Fisheries has indicated that sedimentation problems exist downstream of Forrest Creste(near the golf course). These problems are the result of years of development 3. In Section 3.3 Water Affected Environments - this document and many developments contribute to them. The culverts in the area are rarely passable due provides a good discussion of the wetland characteristics at this to existing sedimentation. The Department has indicated that stream improvements are site. The drainage channel through the center of the property is planned near the golf course to eliminate barriers to fish. an intermittent stream and its importance is discussed in A 3() Paragraph #1. I have electrofished Maplewood Creek at the golf . course and found juvenile coho salmon and cutthroat trout up to During subsequent phases of review(i.e.,conceptual drainage plan),the downstream impacts the weir of the sediment pond and cutthroat trout above both associated with the development of Forrest Creste will be determined. The applicant will be waters. required to mitigate for direct impacts that result from Forrest Creste, in accordance with state law,by either contributing to downstream improvements or decreasing the release rates from the site. Mr. Donald Erickson June 3, 1992 Page 2 A 37 Comment acknowledged. See comment A 34 above. 4. Mitigating Measures on pages 36 and 37 - the drainage channel is addressed. We recommend that it not be enclosed in a pipe and is A ,l f A 38 As a result of analysis of the environmental data that has been submitted for the Draft EIS incorporated in the open space as discussed in #2 paragraph above. and public and agency comment,the Environmental Review Committee will develop a final In addition, we agree that native trees and shrubs should be mitigation document which may result in modifications to the current proposal. incorporated as a major component of the landscape plan to Modifications could include buffers(wetland and perimeter),types of plant materials to be mitigate some of the losses of native vegetation that will occur A 38 used,vegetation to be retained and/or other landscaping issues. The Draft EIS also includes as a result of this project. Native vegetation that is beneficial the stockpiling and use of wetland vegetation and using native plant materials for landscaping to wildlife, mainly birds, should be part of the native landscape purposes as a mitigation measures(Draft EIS page 35-38). plan. 5. 3.5 Animals, ge a s 42 - 43: Deer sign were observed on this site. A 39 The Draft EIS acknowledges that a significant amount of habitat will be lost and that species p The upland wildlife species may move as a result of the loss ofA I .j,j intolerant of urbanization would be forced to move from the site. With the development of habitat; however, the adjacent areas are filled to its carrying The Orchards property to the south and east of Forrest Creste,an "island"of wooded area capacity and many of these wildlife species will perish. within an urban area will be eliminated. No wildlife corridors currently exist within the project area. Because of this,animals not able to co-exist with increased human activity will 6. We recommend that the biofilter swale be placed outside the I 4 �'() likely perish. wetland buffer area. In addition, we recommend an open detention pond be included to enhance water quality. A 40 As a result of analysis of the environmental data that has been submitted for the Draft EIS I would like to thank you for the opportunity to comment on this and public and agency comment, the Environmental Review Committee will develop a final project. If you have any questions, please call me at (206) 774-8812. mitigation document which may result in modifications to the current proposal including the proposed drainage plan. During subsequent city review processes, the applicant and the Sincerely, appropriate city departments will refine the stormwater management system for the final proposal. During the conceptual drainage plan phase of the review,biofiltration,infiltration and an appropriate size and location for a wet pond will be considered. Philip Habitat Biologist • PS:ks cc: Joe Robel, WDF Connie Iten • r 1 I • ) i June 3,1992 P 1 The Proposed Action is consistent with the current Comprehensive Plan. The parcel is surrounded by development,and , the approved Orchards development would enhance the developed nature of the neighborhood,making development of Donald K. Erickson the subject parcel timely. Secretary to the ERC Planning/Building/Public Works Department p 2 The Draft EIS indicates that the current vacancy rate for multi-family rentals in Renton is three percent. This is ATTN: Lenora Bauman somewhat below the industry standard of five percent for a balanced market and indicates that a shortage of multi-family 200 Mill Ave. S. units exists. Easy access to 1-405 makes high density housing appropriate from a public transit view by concentrating Renton, WA 96055 a number of people in one area. The comment on owned and rental dwellings is noted. Re: Forrest Creste P 3 Forrest Creste is currently the only active development application in the area. The cumulative effects of Forrest Creste and other recently approved developments are included in the Draft EIS. Cumulative impacts of the proposal and other Dear Sir, undeveloped properties have also been considered as appropriate(i.e.,sedimentation from upstream properties). Thank-you for the opportunity to comment on the DEIS for Forrest Creste. The notion that the development of Forrest Creste would be piecemeal planning is inappropriate. Forrest Creste is an individual/independent proposal not a portion of a larger development being considered separately which could lead to The Forrest Creste proposal is not logical or timely. The property is P piecemeal planning. not "now ready" for development. Infill must occur first. Section 1.5 of this document contains a discussion of what is considered allowable mitigation tinder state law. The proposed rezone to R-3 should be denied. There is an oversupply of multi-family developments planned for this area. The impact of this cannot be mitigated. Higher density single family homes on small lots 1) 2 P 4 The proposal includes sidewalks along Duvall Avenue NE for the length of the property as required by city code. As is most appropriate for this property. This area needs to maintain a other development occurs along Duvall Avenue NE,sidewalks will also he included in those projects. The proposal also balance between owned dwellings and rental dwellings. includes internal walkways within its design. The Orchards proposal, located south of Forrest Creste,also includes internal walkways and it is anticipated that linkages between the two projects would exist. These walkway networks The cumulative impacts of this proposal together with all other proposed 'c 3 would decrease pedestrian traffic along Duvall Avenue NE. development in this area has not been adequately addressed in this DEIS. Piecemeal planning is not acceptable. The cumulative impacts cannot be P 5 The gated access at 140th Ave SE is a requirement of the fire department to ensure that emergency access is available mitigated proposal by proposal. in times of need. Having the access gated will prevent its use by the residents and general public and thus mitigate any traffic generating impact that this access may have on SE 121st Street and 140th Avenue SE. No services exist within walking distance. This cannot be mitigated. At the very least sidewalks must be provided to the nearest shopping. 1 c ti P 6 The Proposed Action would add minimal light and glare to the surrounding area. Retention of vegetated borders between The increase in pedestrian traffic on Duvall has not been adequately properties and use of appropriate lighting in parking and walkway areas would be considered by the Environmental addressed or mitigated. ` Review Committee in their preparation of the mitigation document for this development. The gated access at 140th Ave. S.E. must be eliminated. The impact I1) 5 on the surrounding neighborhood cannot be mitigated. P 7 Noise levels related to the Proposed Action after construction are anticipated to he negligible. Retention of vegetation • and overall site layout contribute to mitigation of the effects of site-generated noise. It is acknowledged that construction The increase in light and glare on the surrounding neighborhood 1) 6 would temporarily add to the noise levels. The Environmental Review Committee will include noise mitigation in its cannot be adequately mitigated. mitigation document. The noise levels during construction and after occupancy are unacceptable. 1' 7 P 8 The Proposed Action is compatible with the Comprehensive Plan and the Northeast Sector Plan however,the site plan The impact cannot be mitigated. and current zoning designation do not match. A rezone to match the Comprehensive Plan designation is included as part of the Proposed Action. The site plan is not in compliance with the Comprehensive Plan and the V11 high density proposed is unacceptable. The impacts cannot be mitigated, As a result of the analysis included in the Draft EIS and comments by the public and agencies,the Environmental Review Did the City of Renton do an EIS on the current Comprehensive Plan? What t Committee will prepare a mitigation document that will address and make recommendations regarding the appropriate are you using to justify the level of growth indicated in the Comp. Plan? I 0 density for the development. The proposal may undergo further refinement(including density)during subsequent site This has not been adequately addressed. plan review. The transition between the existing single family neighborhood and I p 10 P 9 The current Comprehensive Plan was adopted in 1965 prior to the existence of SEPA. The plan was amended must the higher density multi-family dwellings is inadequate or non-existant. recently in 1986 and a SEPA environmental review was conducted at that time. An analysis of the level of growth The impact cannot be mitigated. CITY OF ON projected in the 1986 Comprehensive Plan is beyond the scope of the Forrest Creste EIS. RENT RE C E I V ED P 10 As a result of the analysis included in the Draft EIS and comments by the public and agencies,the Environmental Review JUN 0 4 1992 Committee will prepare a mitigation document that will address and make recommendations regarding the appropriate I transition between single family and multi-family uses including buffers and types of dwelling units. The proposal may BUILDING DIVISION undergo further refinement(including buffers,dwelling unit type and density)during subsequent site plan review. P 11 The analysis conducted by a certified geotechnical engineer demonstrates that the retention and detention system proposed for the site would not appreciably change the surface water regime from the undeveloped condition. See also responses SURFACE WATER to comments A 25 through A 35. There are severe flooding and runoff problems in our area. This must be corrected before additional development is allowed. The channel erosion I' 11 P 12 In the event that the site is zoned for medium-density multi-family development,City regulations allow buildings to cover of the stream bank has not been adequately addressed and cannot be 35 percent of the lot. The proposed coverage is within the limits established by the Zoning Ordinance. The mitigated. Environmental Review Committee, in evaluating the Draft EIS and in making specific recommendations related to development density and design, will establish an acceptable level of site coverage which is appropriate to the 41% is too high a percentage of impervious surface for the sight. I P ,2 characteristics of the site and affected area properties. The impact of this cannot be mitigated. P 13 The proposed stormwater management controls would at least maintain runoff at predeveloped levels. Systems may also Runoff controls are not adequate. Flows must be reduced. The mitigations reduce downstream runoff from properties upstream of this site. One potential mitigation measure included in the Water are inadequate. I It 13 section of the Draft EIS would require the development to release detained stormwater at the more stringent Department of Fisheries levels(see Draft EIS page 37). The impact to downstream fish migration, spawning and rearing cannot be mitigated. lit I,1 P 14 The City of Renton Storm and Surface Water Drainage Code(CRC 4-22)requires analysis of downstream impacts. This analysis and designation of appropriate downstream improvements will be carried out during subsequent city review Additional drainage facilities must be incorporated. I Il 15 phases so that the selected improvements are related to the specifically approved development. WETLANDS Stream improvements are planned near the golf course to eliminate barriers to fish. If during downstream analysis There are critical wetlands on the site. lbe impact of this proposal I It 16 Forrest Create is shown to contribute to the existing sedimentation problems,the development could contribute to the on the wetlands cannot be mitigated. improvement efforts;however,under the law,one applicant can not be held responsible for the cumulative impacts of years of historical and/or regional development. The extension of NE 6th St. through the wetland has not been adequately lit 17 addressed. P 15 Based on the environmental data that has been submitted for the Draft EIS and public and agency comment, the Environmental Review Committee will develop a final mitigation document which may result in modifications to the SCHOOLS current proposal. During subsequent city review processes the applicant and the appropriate city departments will finalize ( the stormwater management system for the approved development proposal. That system may include additional Capacity for the additional elementary school children does not exist. lit 111 biofiltration,a wet pond and/or infiltration. Where would those kids go to school? This has not been adequately addressed. P 16 The Draft EIS discusses the on-site wetlands and proposes mitigations which meet the requirements of the city's Wetland Ordinance as well as Department of Ecology guidelines. The developer should be paying a monetary mitigation determined by the II) 19 Renton School District for each student produced by the development. P 17 The alignment for the extension of NE 6th Street has not been finalized. Routes under consideration by the city include some street alignments which avoid crossing the wetland. Prior to construction of the extension,the proposed roadway A safe route has not been established for the children from this development II) 20 would be subject to environmental review and its impacts to wetlands would be discussed at that time;as this roadway to walk to Hazen High School. This has not been adequately addressed. is not required for Forrest Creste,environmental analysis for NE 6th Street is beyond the scope of this EIS. P 18 The School District has indicated that the increased number of school children that could result from the development TRAFFIC of Forrest Create and The Orchards may necessitate the reopening of Honeydew Elementary school. (Please see The intersection of NE 3rd and Sunset Blvd. must be included in any responses A 21 to A 25). study of traffic in this area. It is our most critical intersection. It is a level F. It is over capacity. The impact of this proposal on It 21 P 19 The School District does not currently have a mitigation fee system in place. A voluntary fee may he requested by the that intersection cannot be mitigated. The cumulative impacts of all District,however the amount of the fee must be substantiated as being directly related to Forrest Creste. (Please see proposed development in this area on that intersection must beaddressed. responses A 21 to A 25). • The impacts cannot be mitigated. P 20 Please see response P 4. Planned Roadway Improvements are great but until they are in place they I It 22 ` provide no help. Furthermore, there is no guarantee that they will be built P 21 The traffic study area for the Forrest Creste Draft EIS was determined by using the City of Renton's Policy Guidelines at all. _ for Traffic Impact Analysis of New Develqpment. These guidelines require analysis at all roadways and intersections There was a traffic fatality on Duvall one block north of the proposal. that would experience a five percent or greater increase in peak hour traffic volumes due to the proposed development. P 23 The Sunset Boulevard/NE 3rd Street intersection would experience a 0.5 percent increase in peak hour traffic due to the project. Therefore,analysis was not required at this intersection. The errata section of this document includes a graphic 2 (Figure 4)which shows the impact of the Forrest Creste proposal as a percentage of total intersection volumes at all - - t t relevant intersections w t m t e s u y area. — ' i 4 - - This fatality occured within the last year. How are residents supposed I to turn left onto Duvall from SE 121st? This has not been adequately Traffic mitigation measures for the development include a contribution of approximately$153,000 to help fund arterial, addressed. At the very least, a turn lane should be required the transit and non-motorized transportation improvement in the subarea of Renton where this development is located. The full length of Duvall. Signals willbe required also. I j) 24 improvements will be identified through a public process and included in Renton's Capital Improvement Program(CIP). (Please see responses A 7 to A 13). POLICE/CRIME Developments in other subareas of Renton will•also be contributing a traffic mitigation fee. These fees will help to fund The mitigations are not adequate. The impact on the surrounding neighborhood(I) 25 improvements to the Sunset Boulevard/NE 3rd Street intersection. Section 1.5 of this document contains a discussion cannot be mitigated. II of what mitigation measures are considered allowable under state law. Steel doors and frames must be required. Peepholes must be required. 1993 through 1998,identifies two planned Deadbolts on the doors must be required. Locks on all windows must be P 22 The City of Renton's Six-Year Transportation Improvement Program(TIP), b q roadway improvements benefiting the area where this development is located. They include: required. Security systems must be required. (r •26 • Sunset Boulevard(1-405 to SR 169)-Includes Sunset Boulevard/NE 3rd Street intersection. Involves roadway widening, signal improvements and re-channelization. (Scheduled in 1995). . Lighting Eor pedestrian-and tenant safety must be included. Parking lots must be well lit. • Maple Valley Highway(Maplewood Avenue SE to East City Limits)-Widen existing roadway to five lanes,including curbs,sidewalks,street lighting,channelization and storm drainage. (Project will be entirely funded by WSDOT. City A solid fence should separate the proposal Erom existing residential of Renton has budgeted$57,000 for channelization of new roadway. Scheduled for 1993). neighborhoods. I() 27 Other arterial,transit and non-motorized improvements in the subarea where the development is located will be identified FIRE PROTECTION through the public process and included in Renton's CIP. Minimum emergency response times cannot be met. This cannot be mitigated. P 23 According to information obtained from the Renton Police Department,the fatality referred to occurred as a result of There is not adequate fire or aid response for this development. The a car failing to heed a yield sign at the intersection of 121st and Duvall Avenue NE. The city will be conducting a traffic r 211 study at the location of the fatal accident to determine what improvements(traffic signals or changes to channelization City of Renton Fire Department would be unable to respond within the ( acceptable response time of five minutes. The impact cannot he mitigated. and signing)might he appropriate. SITE PLAN P 24 The site plan includes an eight-foot right-of-way corridor located along the full length of the property to allow the construction of a left-turn lane on Duvall Avenue NE. The Orchards development includes a similar right-of-way. The The buildings are too high and too close together. Buffers for sight dedicated land would allow for construction of a turn lane the length of Duvall Avenue NE. and sound are inadequate or non-existant. The transition to the existing single family neighborhood is totally unacceptable. P 25 Mitigation for police services is based on the Renton Police Department's mitigation formula. The Proposed Action would have negligible effect on police protection of the surrounding neighborhood. The site density is too high. P 26 At the time of site plan/building permit review the Police Department may require structural components such as Single story structures, btoms The parking lots must be placed natural vegetation on the inside of the and a solid fence development. P21) deadbolts,peepholes,security systems,and window locks to be provided by the proponent or the leasing agent at the should provide transition to single family neighborhoods. time of occupancy. Parking areas will he illuminated to established standards for parking area lighting(see mitigation page 77 Draft EIS). Perimeter buffers are totally inadequate and too narrow. Additional vegetation should be retained. P 27 Specific fence designs will be considered by the Environmental Review Committee in the establishment of a mitigation document and/or at the time of specific site plan development. The bulk and scale of the buildings must be reduced, the number of units must be reduced and the buildings must be moved further from P 28 The Draft EIS is in error where it states that response times under eight minutes are considered acceptable. Response the North and East boundaries. times under five minutes are considered acceptable. Response times to the development would be between five and a half and six minutes which would not be considered adequate. Increased tax revenues,fire access lanes,smoke detectors, Additional oprn spin and Ter rent.ionnl nl�mrturtitirn must he provided onn site. I (k 30 sprinklers and other fire suppression systems would partly mitigate these impacts. The city recently adopted a fire mitigation ordinance which could also improve conditions. NO DEVELOPER P 29 Current development plans are within the allowable scale for the requested rezone. However,based on the environmental There is no developer for this project and therefore no assurance of data that has been submitted for the Draft EIS and public and agency comment,the Environmental Review Committee the type of quality that will occur. The City and the neighbors are will develop a final mitigation document for Forrest Creste. The mitigation document will address environmental and entitled to know if a developer is any good before moving forward with site plan impacts and may result in modifications to the current proposal including number of units(density),buffers, a proposal. Without knowing the developer there is no way to know parking and bulk and scale of the buildings. if the mitigations are feasible or attainable. Knowing the developer S P 30 The Proposed Action includes two play areas,a workout room,sports court and a swimming pool. The Environmental Review Committee may modify the proposed recreation facilities,if appropriate,based upon the final approved project density and design. • and trusting the developer must be part of the process. We want quality and timely work. There is no way to judge that. This has not been addressed in the DEIS. It must be. This project is clearly beyond the scope of the property owner. There is no developer or any assurance that one will ever be found. This P 31 The purpose of the State Environmental Protection Act(SEPA)process is to analyze a specific project and to determine fact cannot be mitigated. Without a developer of high quality this 3 1 appropriate measures to minimize and/or mitigate impacts to the environment. Any development which is approved must proposal cannot porceed. be constructed without change;any proposed modifications would require new environmental review. SEWERS Throughout the development process it is the city's responsibility to examine the merits of the project so that any developer would be able to construct and operate the development in a responsible manner. Adequate sewer capacity does not exist to accomodate this proposal. Allowing a quick fix to satisfy developers does not serve the interests Periodic inspections ensure continuingconsistencywith state and local requirements. of the community. The inconvenience on the neighborhoods of theP construction of temporary sewer capacity to accomodate this development P 32 has not been addressed. The community should not have to be inconvenienced P'32 As is discussed in the sewer section of the Draft EIS(pages 82-85),the development would be required to participate to satisfy a developers timetable. This proposal should wait until the in approved interim sewer improvements until such time as a permanent system were in place. When the new interceptor permanent sewer capacity is in place before it proceeds. is constructed,the development would be required to pay appropriate connection and operation fees. If the interceptor is never constructed, the interim improvements would become permanent. The interim improvements would not construct temporary sewer capacity but would consist of a transfer of sewage from the Heather Downs Basin to the 'thank-you for the opportunity to comment on the DEIS for Forrest Creste. Lower Maplewood Basin where capacity exists. As such,the interim improvements would not pose an inconvenience to residents neighboring the proposed Forrest Creste development. Sewage from Forrest Creste can be accommodated in both the interim and permanent systems;specific authorization for connection to any interim system would be required Sincerely, I / from City Council prior to final approval of the project. /41/1194)-�)/ •Y-�L�`�y Nancy and Kenneth Johnson 14035 SE 122nd St. Renton, WA 98059 I I- - _ ` JUNE 3, 1992 LENORA BLAUMAN PLANNING DEVISE RENTON MUNICIPAL BE•n crr OF R_DDN 3RD FLOOR RINPON WA 98055 JUN 0 5 1992 RE: FORREST' CRESTS Ihl iI CEJ VEn 1. TRAFFIC CONCERNS: • A. TRAFFIC ON 138TH WILL INCREASE BY APPROXIMATELY 1,235 CAR TRIPS DAILY AND THE ONLY PROPOSAL IS TO ADJUST TRAFFIC LIGHTS ON 4TEE AND SUNSET, AND THIS IS TOTALLY I P 33 P 33 In addition to signal timing adjustments on NE 3rd Avenue/NE 4th Avenue and on Sunset INADEQUATE FOR THIS MUCH TRAFFIC. Boulevard,traffic mitigation measures for the proposed development include: B. TRAFFIC ON 138'IHE TRAVELS APPROXIMATELY 40MPH WITH NO LIGHTS, AND THIS WILL CAUSE I I , Installation of a left-turn lane on Duvall Avenue NE for the length of the ACCIDENTS WITH CARS CROSSING TWO LANES OF TRAFFIC WITH NO TURN LANE. `�4development. • Contributing approximately$153,000 to help fund improved traffic signal operations C. IN YOUR TRAFFIC IMPACT ANALYSIS IT SHOWS THE ROADS DIRECTLY IN CONTACT WITH FORREST • and roadway improvements in the area. CRESTS DON'T NEED IMPROVEMENT, AND THAT MEANS THE 153,000 WILL GO TO OTHER ROADS I iI :35 IN THEHTO FIX.CITY WHEN THEY SHOULD IMPROVE THE ROADS FEED:TED NOT OTHER ROADS THE CITY The Environmental Review Committee will prepare a mitigation document for Forrest Creste. -WANTS That document will be based on information contained in the Draft EIS and public and D. PEDESTRIAN TRAFFIC HASN'T BEEN ADEQUATELY ADDRESSED, THERE ARE NO SIDEWALKS IN agency comment. The mitigation document may result in modifications to the proposed plan that could change the traffic impacts associated with the development. THE CURRENT PLAN. • E. YOUR PROPOSAL STATES THERE ARE PARKS FOR THE RESIDENTS TO USE AND THEY ARE IN • Please see responses P 34 to P 36. Section 1.5 of this document discusses what are WALKING DISTANCE, BUT THERE IS NO SAFE ROUTE TO ANY PARK IN THE AREA WHERE FORREST considered allowable mitigation measures under state law. CRSTE IS TO BE LOCATED. LAST YEAR THERE WAS A CHILD FATALITY ON 142ND WHICH 'IS EAST [J 3 G OF THE PROPOSED DEVELOPMENT AND IS WHERE HAZE N HIGH SCHOOL IS LOCATED WHICH IS A PARK YOU PROPOSE 2NILDREN WALK 1W. THE PREVIOUS YEARS WE HAVE HAD GI7o2 CHILDREN P 34 The proposed development includes an eight-foot right of way for a left-turn lane on Duvall Avenue NE the full length of the development. The Orchards development recently approved III'T BY CARS ON 147.Nf)• also includes a similar right of way. 2. SCIIIX)1, LINCERNS: P 35 The proposed development right of way for a left-turn lane on Duvall Avenue NE as a traffic A. YOU PROPOSE THAT CHILDREN WALK TO HONEYDEW AND HAZEN YET YOUR NOT PROVIDING SAFE mitigation measure. A sidewalk will also be installed on Duvall Avenue NE along the length ' PATHS FOR THE4 TO GET TO SCHOOL. of the development as required by city code. The developer will be responsible for dedication of right-of-way and future construction of half the roadway on NE 6th Street from B. THEE LOPMH GRADE SCHOOLS SAY THEY CAN'T ADEQUATELY HANDLE THE CJIIIDRE3V FROM THISDuvall Avenue NE along the full length-of the south property line. The required traffic DEVELOPMENT. P 3 r mitigation fee of $153,000 will go to arterial, transit and non-motorized transportation improvements in the subarea of Renton where this development is located. The C. YOUR PROPOSAL TO ADD PORTABLE'S TO HANDLE THE CHILDREN IS BUILDIPIABAE, E NEED improvements will be identified through the public process and included in locateRento 's CIP TO DO MORE THAN ADD A BUILDING FOR THESE CHIIAREN. TO ADD BUILDINGS AND NO TEACHERS ,I ,;�` TO AN ALREADY PUSHED PUBLIC SCHOOL SYSTEM IS UNFAIR TO THE TEACHERS AND CHILDREN. P 36 Mitigation measures discussed in several locations in the Draft EIS include: 3. POLICE CONCERNS: • On-site pedestrian sidewalks and pathways A. POLICE CALLS ARE ONLY BEING ADDRESSED IN THE PROPOSED FORREST CRESTS DEVELOPMENT. • A school bus stop near The Orchards or Forrest Creste properties B. IN URBAN AREA'S CRIME INCREASES AND THIS WAS NOT A CONSIDERATION IN TIE ADDED The project will also include a sidewalk on Duvall Avenue NE along the length of the POLICE PROTECTION, THE ONLY CONSIDERATION WAS CALLS THAT WOULD BE GENERATED AT P3() proposed development as required by city code. • THE APARTMENTS DIRECTLY. The City of Renton Police Department and the King County Sheriffs Department have no C. (NJ THE EAST SIDE OF IC)RRE:ST CREME IS THE COUNTY LINE AND THERE HAS Dt�IJ NO � information on the fatality referred to in the comment. CONSIDERATION FOR THE INCREASE OF CRIME THAT WILL HAPPEN IN THIS AREA AND HOW • IT WILL BE HANDLED. THE CITY AND COUNTY HAVE IN THE PAST HAD PROBLEMS DECIDING WHO SHOULD GO ON A EMERGENCY RESPONSE BECAUSE OF JURISDICTIOII. P 37 Thethat School uld result from numberict has indicated that the increased from the develop ent of Forrest Creste and The lOrchards may necessitate 4. FAST BUFFER CONCE RNS: the reopening of Honeydew Elementary school. A. THE NOISE FROM FORREST CRESTE IS INADEQUATELY BUFFERED ON THE EAST SIDE. I I) 'I() P 38 See response to comment P 37 above. P 39 The impact of the project on police services is the subject of the discussion in the Draft EIS (pages 75-77). The proposal would not significantly impact demand for police services. P 40 As discussed in the Noise section of the Draft EIS (page 44),the Proposed Action would increase ambient noise over the existing conditions. Noise levels are anticipated to be well within the Noise Ordinance and EPA Standards. • B. TRAFFIC CAN BE HEARD AT THIS TIME AND A THIRTY Fta'r BUFFER WON'T MAKE A DENT IN THE NOISE OF THE ADDED TRAFFIC AND PEOPLE. P 41 The Proposed Action would add minimal light and glare to the surrounding area. Retention C. THERE WILL BE AN INCREASED GLARE FROM THE CARS AND PARKING LIGHTS, AND IF SCME 11 I I of vegetated borders between properties and use of appropriate lighting in parking and LARGE TREE AND LARGER BUFFER WERE LEFT THIS WOULD GIVE A LITTLE PRIVACY. walkway areas would provide adequate mitigation. The Environmental Review Committee will include specific mitigation measures t reduce light and glare impacts in the mitigation 5. SEWER CONCERNS: document for Forrest Creste. A. THE SANITARY SEWER AT THIS TIME AREN'T ADEQUATE FOR THE CONSTRUCTION OF FORREST P 42 See response to comment P 32. CRESTE. i B. THERE IS A MORATORIUM ON CONNECTION TO EXISTING SEWERS AND FOR HEALTH AND I I 2 P 43 The Plants and Animals sections of the Draft EIS (pages 38 and 42 respectively)discuss ENVIRONMENTAL REASON THIS SHOULDN'T BE EXEMPT UNTIL THE SOLUTION IS IN PLACE. impacts and mitigations to plants, animals and wetlands. Erosion potential and proposed mitigations are discussed in the Earth and Water sections of the Draft EIS(pages 21 and C. IF YOU EXEMPT THE SEWERS AND A SOLUTION ISN'T FOUND THERE COULD BE A LARGE 27 respectively). ENVIRONMENTAL AND HEALTH RISK TO THE AREA. P 44 These issues were discussed in the Water section of the Draft EIS (page 27). The drainage 6. ENVIRONMENTAL CONCERNS: regime was presented and the issue of drainage from adjacent uplands was included. A. EARTH- P 45 The proposed wetland buffers meet the requirements of the city's Wetland Ordinance. 1. DAMAGE TO ALL NATURAL HABITAT BY CLEARING ALL THE LAND EXCEPT THE WETLANDS. P 1.; Mitigation measures to protect wetlands are discussed on pages 35-38,41 and 43 of the Draft EIS. The alignment for the extension of NE 6th Street has not been determined. Detailed 2. EROSION WHICH WILL RUNOFF INTO THE WETLANDS AND CAUSE DAMAGE TO THE WATER environmental review will be required prior to construction of the roadway. Please see QUALITY AND NATURAL PLANTS AND ANIMALS.• response P 17. B. WAI H- • P 46 Runoff would be cleaned using oil/water separators, settling areas, and biofiltration to 1. DRAINAGE FOR THIS AREA WAS NOT FULLY ADDRESSED. remove contaminants before release. For more detailed discussion refer to the Water section of the Draft EIS(page 27). 2. WHERE WILL THE RUNOFF FROM THE HIGHER LAND ON THE EAST SIDE BE DRAINED ID, AND WILL IT BE ABLE TO ADEQUATELY DRAIN INTO THE DEVELOPMENT BELOW. P 47 Impacts to air quality would be negligible and are discussed in the Air Quality section of the Draft EIS (page 25). Use of fireplaces and wood stoves is regulated by state legislation 3. THE CAPACITY OF THE WETLANDS WILL DECREASE IN TIME AND ADJUSTMENTS SHOULD BE (RCW 70.94.450-487). Any wood stoves or fireplaces in the development would be subject MADE TO ACCOMMODATE THIS PROBLEM BY LEAVING EXTRA WETLAND AND BUFFER AROUND to applicable regulations. THE WETLANDS. • It ,15 4. THE ENTRANCE ON NE 6'111 STREET THAT IS PROPOSED GOES DIRECTLY THROUGH THE P 48 The Draft EIS discusses the probability for a decrease in the number and diversity of plants WETLANDS, AND HOW WILL THIS BE ADDRESSED TO LEAVE IT UNTOUCHED. and animals as a result of urban development. Remaining wetland and buffer areas would provide some habitat for species that are able to co-exist in an urban environment. 5. what will be done to control the surface water quality from all the extra I 11 .16 _ runoff? C. AIR- 1. FIREPLACES AND VEHICLES WILL CAUSE AIR QUALITY PROBLEMS AND SPECIAL WOOD P .17 BURNING STOVES SHOULD BE INSERTED IN FIREPLACESS IF ANY AT ALL. • D. ANIMALS- 1. BY CLEARING ALL THE LAND AND ONLY LEAVING THE WETLANDS THERE WILL BE A LARGE AMOUNT OF ANIMAL AND PLANT lags. THERE IS SEVERAL ANIMALS THAT WILL I' '18 NOT SURVIVE OUT OF THIS AREA BECAUSE THEY HAVE NO WHERE LEFT TO GO. SOME EXAMPLES WOULD BE THE DEER AND OWLS ,QUAILS AND THE BURROWING ANIMALS RABBITS ECT. • 7. SUMMARY OF CONCERNS: I UNDERSTAND THAT DEVELOPMENT WILL HAPPEN IN THIS AREA IN THE NEAR FUTURE, BUT THE IMPACT DOESN'T HAVE TO BE SO GREAT. I ASK THAT YOU CONSIDER ALL YOUR FACTS THAT POINT TO THE DAMAGE THAT APARTMENTS WILL CAUSE TO THIS AREA. THE STREETS OF THIS AREA WILL NOT HANDLE THE TRAFFIC SAFELY. THE CHILDREN WILL NOT BE ABLE TO WALK TO THE PARKS OR SCHOOLS WITH OUT BEING ON-A BUSY STREET WITHOUT A SIDEWALK, AND THERE SCHOOLS WILL BE PUSHED TO THE MAXIMUM WHICH MEANS MINIMUM LEARNING. THE EAST SIDE AREA WON'T RECEIVE ANY ADDITIONAL EMERGENCY RESPONSE YET URBAN AREAS HAVE INCREASED CRIME RATES. THE SEWER AND DRAINAGE ARE NOT PREPARED TO HANDLE THE INCREASE FROM FORREST CRESTE YET THEY WANT AN EXEMPTION. THE DAMAGE TO THE ECOSYSTEM OF THE AREA WILL BE GREAT. ALL THE APARTMENTS IN THE AREA HAVE VACANCIES. EVERYTHING I READ OUT OF THE FORREST CRESTE ENVIRONMENTAL IMPACT STATEMENT PROVES THAT THE BEST ACTION FOR THE ENVIRONMENT WOULD BE ALTERNATIVE 2- NO ACTION OR SINGtF FAMILY DWELLINGS. B DEBBIE KENWORTHY • ) 1 9- SS Iti3S P O& St, .for, w ►�ro5 1 a- p 4 P 5. L r//c am 5-.5- •J _Alf` w l nl > L /� Z } /`�'f - . • 13732 S.E. 141st Renton, WA 98059 June 3, 1992 _.. . - • Donald K. Erickson, AICP -ai'r Secretary to the ERC Planning/Building/Public Works Department ATTN: Lenora Blauman 200 Mill Ave S Renton, WA 98055 Subject: Draft Environmental Impact Statement Proposal: Forrest Creste - Addressing Off-site Drainage pages 30 to 36 • Page 32 4th paragraph Re: Fish Resources in Maplewood Creek are not well documented. There are two Creeks that come together above the Maplewood Golf Course that become Maplewood Creek. The Western Creek p 49 The Department of Fisheries did not respond in writing to the Draft EIS. The Department has resident trout. On March 25, 1992 Gino Lucchetti,Ecolo- has indicated that sedimentation problem currently exist downstream of the Forrest Creste gist K.C.S.W. Management Department with the Cedar River I) 49 site(by the golf course)as a result of years of development. Many developments contribute Basin Study Team cruised the Creek and saw trout. He took pictures May Flies, so a natural food source for trout is to the existing sedimentation problems. These problems have caused the culverts in the area also documented. The Trustees of the Corporation were very to be rarely passable. pleased to learn this Creek was viable because in the years passed they have spent many many hours in fish enhancemement The Department has indicated that stream improvements are planned near the golf course to of this Creek and with the upland developement have seen their eliminate barriers to fish. During subsequent phases of review(i.e., conceptual drainage labors wash away down-stream each year. With accelerated plan),the downstream impacts associated with the development of Forrest Creste will be channel erosion some large logs have fallen cross stream again forming and formed natural water bars so the stream is determined. The applicant will be required to mitigate for impacts that result from Forrest Creste by either contributing to downstream improvements or decreasing the release rates for pools for the trout. the project. The proposed action page 32 reads well and on page 34 it .states the proponent be required toprovide more detailed I� P 50 As a result of analysis of the environmental data that has been submitted for the Draft E IS storm drainage design. So its clear that Planning/Building/ 50 and public and agency comment,the Environmental Review Committee will develop a final Public-Woks Department do recognize the need to control mitigation document that may result in modifications to the current proposal. During the flow of extra run-off before it's dumped into Creek #o303 subsequent city review processes the applicant and appropriate city department will finalize in our Common Property. the stormwater management system for the final proposal. That system could include •.Sincerely additional biofiltration,a wet pond and/or infiltration. N1ar�j h, Trustee Maplewood Heights Maintenance Corporation • . � I CITY OF RENTON FORREST CRESTE PUBLIC MEETING f Meeting Minutes Thursday, May 21, 1992 7 :00 p.m. - 8:00 p.m. City of Renton Council Chambers Renton, Washington Chair: Lenora Blauman W&H ..Pacific Ron Deverman Marianne Johnson Braund Design Group: Mel Easter E CC oyri +ry+ E D3 JUN 0 2 ,;.2 ( BUILDIOG DIViSiON JOAN T. RIKANSRUD, CSR (206)' 850-8970 LENORA BLAUMAN: Has everybody signed in on the sign-in sheet? You don't need to do that to speak this evening, but we would like to have your name and address so that we can make sure that you get personal � _- copies of anything that comes out of the City. So, I'm just going to pass this around and invite you to sign up. I also have here this evening, which you may use or not depending on your choice, a comment sheet. You can use this, or comment verbally tonight, or send in personal letters if you'd like to give. This is just a chance to have an extra piece of paper to take notes on or comment on. The final little handout I have for this evening is a one sheet summary of what happens in the Environmental Review Process and Hearing Examiner Process. Now, this is really not a complete description. It's just a place for you to start. But for everyone who signs in Y tonight, I will be sending out a schedule and a summary of likely events that go with this process, so that you'll have a better idea of the timing and where you can comment and how. PUBLIC HEARING FORREST CRESTE MAY 21, 1992 7 :00 P.M. RENTON COUNCIL CHAMBERS LENORA BLAUMAN: Well, good evening formally. My name is Lenora Blauman. I am the project manager for the Forrest Creste EIS. I 'd like to welcome you here this evening. In the back there are refreshments, if I get boring or you get hungry. Also with us this evening are two representatives from Wilsey & Hamm, the consulting firm that •the City hired to prepare the Environmental Impact Statement for the proposed Forrest Creste development, and that's, Marianne sitting over there, and Ron. And toward the back of the room is Mel Easter. He is the architect working on some of the proposed plans for Forrest Creste. The purpose of this evening's get-together is for you to have an opportunity to comment and ask questions on thethe Draft Environmental Impact Statement. And those JOAN T. RIRANSRUD, CSR (206) 850-8970 2 I_ questions will be answered, not generally this evening, but they will be answered in the Final Environmental Impact Statement. Before we get started by giving you your chance to share your questions and ideas with us, because this project has gone on over some time, I 'd like to take an opportunity to give you a little bit of history and some information about the process so that you know what has happened and what will happen in the future. As many of you may be aware, this project first came into the City in 1988. It was reviewed in a preliminary fashion, and eventually what happened was that a determination of significance was issued. Now, that's a regulation, or at least a determination, established by the State, by our State Environmental Policy Act, and when a determination of significance is issued it means that it is possible that there would be some significant adverse impacts from a project and/or some significant benefits. But, whichever, those might be, it says that there is enough likelihood that something significant will change in your' community from a project on this site to bear looking into. And that's what generates an Environmental Impact Statement. The first step in an Environmental Impact Statement is always what we call a Scoping Meeting. That is, that the community and city representatives have an opportunity to come together in a series of meetings and talk about what their particular concerns are. A number of concerns are raised with any project, and this project is no different in that regard. Some of the things that were particularly raised by way of concerns were: What would happen to the wetlands that were on the site? What would happen with respect to new transportation trips that would occur? What would happen to stormwater runoff that would •be generated by a change in use on this site? And also, what would be likely to happen from the change of a site that is basically not developed at this time into one that is developed in the future? And so, it was with that thought in mind that we began to look at this project and see what those impacts might be. Normally, an Environmental Impact Statement takes approximately 6 months to a year to complete, but a number of things have intervened in this one. There was a change of responsibility. That is, the folks that were first applying for this project are no longer involved in it. There is a new proponent at this time. We wanted to look very carefully at some of the technical issues. So that took some time. And there JOAN T. RIKANSRUD, CSR (206) 850-8970 3 f • were also some changes in the financial market which , delayed work on this project for awhile. At this point, the first document, the first official document, has come out. That's the Draft EIS, which no doubt most of you have seen, and probably is what brought you here this evening. Based on the comments that you make and the comments that city staff make on the Draft EIS, a Final EIS will be prepared. And that will be intended to answer the questions that you raise. The Final EIS will be submitted for public review during an official comment period. At the end of that official comment period, the City will sit down and develop a mitigation document. That is, the City will say: "X" number of traffic trips are generated from a proposed project on this site, therefore, City policy and City regulation, State policy and State regulation mandate that the applicant provide a signal, for example, or an extra lane on a street, or a contribution to the City Transportation Benefit Zone, which calls for improvements to major roadways in the northeast section of the City. We'll go through every impact that's identified for this project and put together a mitigation measure that's appropriate to that impact. If we anticipate ' 22 trips to a site, for example, from a fire truck in the course of a year, then the applicant will be required to pay into that number of trips. A number of the mitigation measures that we eventually put together in a mitigation document will duplicate those that you've seen in the Draft EIS and in ' the Final EIS; suggestions made by the consultant hired by the City to do this project. But there will be a number of other mitigation measures, as well, and they'll begin to form the specifics of the project. You may be looking at "X" dwelling units here tonight. We have to begin somewhere to look at the impacts. But, if you see "X" dwelling units here tonight, it doesn't necessarily mean that "X" dwelling units will eventually be recommended in the mitigation document. You see some landscaping here tonight. The landscaping plans might be different, wetland plans might be different. What you've got to look at this evening is a schematic, a place to begin evaluation of impacts. When the City issues a mitigation document, you have another opportunity to comment and to appeal. That's really your first actual opportunity to appeal the document to tell us that, whether or not we've done JOAN T. RIKANSRUD, CSR (206) 850-8970 4 an adequate job in your estimation. When you're appealing, it's important then, if you decide to do that, that you can really document that somehow we have not adequately looked at the environmental impacts or not adequately honored a City law or a City policy. Once the mitigation document is out, then we begin to look at the land use and the zoning. And here is where we begin to say again: "X" number of units can go on this site, and this is what they need to look like, and this is how they need to function, and how much we get specifically again in the way of fees. So it's another layer that begins to refine what we did with the Environmental Impact Statement in the first place. We also look at that point at a rezone for this property, as most, if not all of you know. At the present time, the property is designated for multi-family use on our Comprehensive Plan, which is our goal plan. You also probably know that, in keeping with the State's Growth Management Act or looking at future designations for the Comprehensive Plan in all areas of the City, including the northeast area. In this northeast area, and as a matter of fact throughout most of the City, at the present time the Planning Commission and City Council are inclined to go with the present Comprehensive Plan for most areas including this area, which means that this area would continue to ,be designated for multi-family use. We're looking at another factor as well, which is that under the State's Growth Management Act, Renton generally and a good portion of property surrounding Renton, be it in King County or in the City of Tukwila, is all looked at as an urban growth area. That having been said, the property as you know now is zoned for single-family use. ' It does not match the Comprehensive Plan. The State will call for properties to match Comprehensive zoning in short order given, assuming the continuation of the current State policies and regulations. Under our zoning ordinance, if a property is zoned for multi-family or a medium density or R-3, which is what is proposed for this site, it would be allowed to have a maximum of 25 units to the j acre. In fact, even with the currently generically proposed 200 units we have considerably less than that. More like 17 units to the acre. In terms of review of the site plan and review of the rezone, the ultimate arbiter of the site plan is the Hearing Examiner. And that he hears the site plan and the rezone in a public hearing where you also have the opportunity to attend and comment. The Hearing Examiner JOAN T. RIKANSRUD, CSR (206) 850-8970 5 � I makes the final decision on the site plan. But the City Council makes the final decision on the rezone. In other words, the Hearing Examiner makes the recommendation to the City Council on the rezone. So, those are also places where you have an opportunity to comment and to participate. If we anticipate correctly, then the Final Environmental Impact Statement should be available sometime early to midsummer -- we're finishing up, as you know, our 30-day comment period for the Draft EIS, and then all of those comments or letters, your verbal comments, will be submitted to Wilsey & Hamm Pacific so that they can go ahead and incorporate those into the Final EIS. When I finally stop speaking and you get to have your chance this evening, you'll be speaking into the microphone over there. We'll ask that you give us your name and address. We have a stenographer recording everything that's being said tonight, and she will be providing verbatim minutes of everything that's said. So, there will be lots of opportunities to make certain that your comments are recorded in our documents. Also, as I said to you earlier, we passed out a sign-up sheet so that we'll make certain that we have your name and address for any future mailings. What I want to do before giving you your chancel this evening is to turn the microphone over to Ron Deverman for a couple of moments to describe what goes into the making of an Environmental Impact Statement, and then Mel Easter will talk for a couple of minutes about how we selected this schematic design to begin with and what it includes. After you had your chance to ask your questions and make your comments, we'll do a little bit of summing up and make sure that we've got an opportunity to get back to you when the opportunity arises. Ron? RON DEVERMAN: Thanks Lenora. Can everyone hear me? I just want to spend a couple minutes talking a little bit about the Environmental Impact Statement and what the purpose of it is and how the process works. UNIDENTIFIED SPEAKER: I can't hear a thing you're saying. LENORA BLAUMAN: Ron, do you want to come up here and use the microphone? RON DEVERMAN: Let me use the microphone, ! JOAN T. RIKANSRUD, CSR (206) 850-8970 6 • Lenora mentioned a little earlier that there was a determination of significance for the Forrest Creste Project. And essentially, what that means is under SEPA (and SEPA means the State Environmental Policy Act, ) is that any proposal that's judged to maybe have potential significant impacts, then that proposal should be studied for its affects on the natural, as well as the built, environment. And that's essentially what we've done in the Draft Environmental Impact Statement. One of the first things you do in SEPA, though, is to try to identify what are the main issues that you have to look at in the document itself, and that's handled through Project Scoping. In fact, Lenora mentioned that a little earlier, and we did have a Public Scoping Meeting, and a number of issues were • brought up. Generally, they were related to the_ earth and soils, air quality, water quality and wetlands that are on the site, vegetation, plants and -animals, noise related to construction, land use, especially in light of the rezoning, aesthetics light and glare, parks, transportation, public services .and utilities. And those are the main focus issues that we were looking at during the analysis process. When we put a Draft EIS together, for each of those issues what we first look at is what we call the affected environment. And essentially, what that is, is the existing conditions. What does the property look like now? What's going on there now related to traffic and land use and vegetation; all those issues I've mentioned. And then we start analyzing the environmental impacts and potential impacts that this development could occur on that site. And to do that, sometimes we have to do a number of technical studies. For this particular document, EIS, we did a transportation study. We also had a geotechnical firm go out and take a look at the soil conditions. We did a fairly extensive analysis of the land use around that area. And after we do that and get a sense for what those impacts are going to be, then we look at mitigation measures, and essentially what those are, are ways that we might be able to minimize or reduce potential impacts of this proposal. And we look at those, all of that analysis, in light, not only of the proposed alternative, which we have a schematic here, but also any other alternatives that are being looked at. There was a Site Plan B in the document that we also looked at, as well as the JOAN T. RIKANSRUD, CSR (206) 850-8970 7 No Action Alternative. And SEPA really does require an objective, unbiased recording of those impacts, and so that was really our responsibility to do that. We worked directly with the City of Renton to do that. ? And then, finally, the Draft EIS was published, and I 'm sure all of you are familiar with this, it's been available at the library and other places to look at. And then you have about 30 days -- I believe the comment period now ends June 4th; is that correct? And so the public meeting is really a time for you to ask your questions about the proposal and give us your comments about the proposal. And it really is a good opportunity for you to address any issues of concern that you have. And from this draft then we will develop a Final EIS, and that records all of your comments and the ; responses to your comments, answers to your questions that you may have. And then that final is issued. That's really about all I had to say. Marianne, like Lenora mentioned, is our Senior Land Use Planner. She's here and will be able to answer any questions. Did you have anything else, Marianne, as far as the process? MARIANNE: I'd just like to add that we also did a wetlands study, too. RON DEVERMAN: Oh, yeah. In fact, the wetlands are noted on the schematic there. Yeah, that's I a good point. We did find wetlands on the site. The main one was in the southwest corridor. I think it's about six-tenths of an acre in a Class II wetland. LENORA BLAUMAN: Mel, did you want to come up and talk a little bit about the Plan? MEL EASTER: My name is Mel Easter. I'm 'a landscape architect principal with Johnson Braund Design Group. We have been providing services -- designing planning services to private developers for about 1,6 years. Our primary focus has been in the multi-family; business. In this particular project, as in all projects, we analyze a lot of different things as a part of developing both the building designs as well as the site plan. We also look at the landscape treatments, and as we get further down the road in this process, we will get more specific with some of those issues. What I wanted to do tonight was just give you just JOAN T. RIKANSRUD, CSR (206) 850-8970 8 kind of an overview of where we're at now with the Site Plan. Again, the Site Plan is very preliminary. It's very conceptual. But I think it begins to give you an idea of how a project comes together, and the kinds of issues that we are all taking a look at as a part of development in your community. Some of the important issues I think that have been looked at and will continue to be evaluated, as Ron has already mentioned, there is a six-tenths of an acre wetlands located in the southwest corner of the site. What we have done to address that is to, basically, leave it untouched. And, in addition to that, we have provided an 80- to a 100-foot buffer area around it. Now, that buffer will be left in its natural condition. And, in our experience in dealing with both the Corps of Engineers who has ultimate jurisdiction over the wetlands, and also in local jurisdictions, such as the City of Renton, the preferred method for dealing with wetlands is to essentially leave them in their natural condition. Second issue I think of significance on this property is the relationship 'between this site and the surrounding properties. And I think of particular interest has been the relationship to the adjacent single-family development to the north. What we have done -- again conceptually -- to deal with that conception is on the north boundary you will note a series of small buildings which are townhouse-type structures that are two-story. They're in four-plex and six-plex configurations. They all have attached garages. The idea being that we want to provide a transition from the lower density single-family to a low density multi-family, which in this case would be in the range of 6 to 8 units to the acre. And then the rest of the site, about two-thirds of the site to the south, will be the higher density or, in this case, technically the medium density of designation in the range of 17 units to the acre. These units are in twelve-plex buildings, typically, and are about two and a half stories as the typical configuration. Now, for reference, the boards are designated with numbers. Board number one is the Site Plan. Board number two is, on the two and a half story, the medium density multi-family units, those are stacked. And then the board on the far left would be the townhouse units. I believe that's board number three. So when you get a chance to look at those a little JOAN T. RIKANSRUD, CSR (206) 850-8970 9 1 closer -- and I 'd be happy to kind of relate 'those for you, so that you can see where the buildings are located on the plan. I think the other, just as far as elements, that we j_ looked at, and specifically on the Site Plan, we hadithe building configurations and their relationship to both the off-site properties, as well as the interior relationships, one-to-another. The parking, of course. The vehicular circulation, and how people get in and'' out of the site. 1 And then I think another critical piece is just the open spaces provided. You know, what kind of living environment do people have in there. And I guess the fourth item would be the perimeter of buffers. Again, the issue of relating how the project relates to the properties that are off-site. And just one final comment I want to make is that one of the major elements and considerations that wet have, particularly in this site, is the preservation of the existing vegetation. We have worked very hard to develop a concept that provides a fairly significant; open courtyards within the interior of the project, and our goal is to try to save as many of those significant existing trees as we possibly can. And the same would be true around the perimeters of the property. Our goal would be to use existing vegetation to serve as buffers and provide nice transitions from on-site to off-site. I think that's all the comments I 'd like to make now, and I 'd be happy to answer questions. LENORA BLAUMAN: Thanks, Mel. Well, at long last, it's your turn. So, please, feel free to come on up to the microphone and give us your name and address, and tell us what you'd like uis to know. NANCY JOHNSON: My name is Nancy Johnson. My address is 14035 Southeast 122nd Street, Renton, with the zip of 98059 . It's my understanding that this process is to now take additional questions and comments on the Draft HIS. And that after this process we would also be given the opportunity to submit additional written comments through the fourth of June? 1 LENORA BLAUMAN: That's correct. NANCY JOHNSON: I don't think that the .1 wetlands have been adequately addressed. I would like C JOAN T. RIKANSRUD, CSR r (206) 850-8970 f 10 to know if 6th Avenue or 6th Street, whatever it is, on the southern border were extended, what would be the impact on that wetland that you're talking about preserving and leaving in its natural state. If you ended up cutting that road through, as has been suggested, would that wetland still remain in the state it's in now? I don't think the fact that you have such a large impervious surface on that property has been adequately addressed. I don't think that the drainage channel at 140th Avenue Southeast has been adequately addressed. Is it important for you that I get more specific on this at this point or is it all right to just make comments of that type? LENORA BLAUMAN: I think it's fine for you to go ahead and start out with general comments, and especially if you're going to be following it up with a letter, and we can get some clarification from you if you want to. What I 'm concerned about, is that everybody who wants to have a chance to speak does have an opportunity to do that, and then if there is some selected areas that you would like to particularly expand upon then please go ahead and do that either now or a little bit later on. NANCY JOHNSON: I appreciate that, so I will then run through it rapidly and give everybody else an opportunity. LENORA BLAUMAN: But, you know, please don't feel that you need to be cut off if it's something of special importance. NANCY JOHNSON: Nope. That's okay. Noise during construction and after occupation has not been adequately addressed. The site, as it is now constructed, is not in compliance with the Comp Plan. Going to an R-3 zoning would not be in compliance with the current Comp Plan. I don't think it's fair to assume that the Planning Commission and the Council will go with the current Comp Plan as it's now .in place. I think you can -- you don't know what they're going to do, and to even suggest that assumption I don't think is fair. The density on the site is way too high and it's totally unacceptable. The property is not now ready for JOAN T. RIKANSRUD, CSR (206) 850-8970 11 I ; development, is not timely in that infill has not occurred. The suggestion in the Draft that this is a buffer to a suggested business park south of the property shouldn't even be in there because I think everybody i, knows that the Business Park South is a dead issue; will not occur, isn't going to happen. This is no kind of transition for that. If my understanding is correct, the orchard would be south of this site. And I don't see that sitting anyplace in the Draft. And if I'm mistaken on that., I would like to see that someplace. There are no services within walking distance. Of the multi-family facility, there are not provisions for sidewalks to existing services. There is a significant difference in land use densities from this site to surrounding sites with inadequate buffers on all sides, with the exception of, of course, Duvall on the south side. Traffic was not adequately addressed. Within the last year, there was a traffic fatality on Duvall within one block of this site. That is no place in the Draft. Nor has it been looked at why that occurred and how this would impact other traffic coming in and out of that kind of intersection. The buildings are too large. They are too high. More vegetation should be kept. Impact on parks and recreation is inadequate. The traffic study should have included Northeast Third and Sunset Boulevard. And the fact that you take it all the way down the hill just short of that intersection, I think is sort of insulting. The impact on schools has not been adequately addressed. However, I don't hold the City or the people preparing the Environmental Impact Statement at fault for that. The gate at 140th Avenue Southeast must be j eliminated, and the impact of that gate has not been adequately addressed. The minimum emergency response times cannot be met. That has not been adequately addressed. And then, I just have one other, and I'm going to point to the design so that you understand what I'm talking about. The architect that was explaining how nice these buffers are for these houses here. When you design a site, you don't design the site based on what is currently on the property. The property to the east is currently vacant. You have to look at the potential use of that property in the future, which is not vacant JOAN T. RIKANSRUD, CSR (206) 850-8970 12 land. And you need to design your project so that it provides a buffer for what could be there in the future, not for what is there today. So, I think that the fact that you are putting a really -- and if you look at the current. vegetation on that property, there is nothing there that would buffer this property from this parking lot. And that would give you a 7-Eleven affect at night with people coming and going, doors opening and shutting. Yes, that property is vacant now. That's all fine and good. But when that property is developed later on, that is not an adequate kind of buffer for what could potentially go on the site. And you should look at the Renton Comp Plan for what they would like to zone that site for later on. So, I'm finished now. Thank you. LENORA BLAUMAN: Thank you, Nancy. Is there somebody else that would like to speak this evening? UNIDENTIFIED SPEAKER: I think she covered it all. LENORA BLAUMAN: If Nancy has covered your concerns, there isn't really any need to repeat them because they will be addressed. But I want to make sure that everybody who would like to speak has a chance to. do that. Okay. With that I'd be glad to close the public portion of this meeting, but if you've got other questions that you'd like to ask informally of Ron or Marianne or Mel, they will be hanging around the plant to discuss the items with you. Thank you for coming. (The meeting adjourned at 7 :50 p.m. ) JOAN T. RIKANSRUD, CSR (206) 850-8970 13 SIGN IN SHEET PLEASE PRINT • NAME • ADDRESS PHONE /9•// c e -P*)M,ti94- e /-? ,%,?.7- /�,/; L e S' F-x A/ GIS .72 _ /1�1Mt -i 7- ec a .-.S,E, ? �, `265-9 ✓aL� ALE ZZ la � S, L% ,73S'- cS/ z7 i UI ? p1 E-F f7e f / • / i / / /C• 2 /L/7 .--S/= 3 S G r? Z _ r /) y n /Yox 9 - sr' iz y rti cT V 35-- oyez e vi s 6�(�c%/ /2u. Li u `/.Si_ S •