The URL can be used to link to this page

Home My WebLink About03558 - Technical Information Report R�CF� I vE,� � APR 13 ZOIp ', � PL4Jy R�� '� `11 ' � DRAFT TECHNICAL INFORMATION REPORT for WONDERLAND ESTATES RENTON, WASHINGTON Apri19, 2010 Prepared for: King County Housing Authority 600 Andover Park West Tukwila, WA 98188 Contact: Hugh Watkinson (206) 574-1230 EmaiL• hughw@kcha.org Prepared by: HUITT-ZOLLARS, INC. 814 East Pike Street Seattle, Washington 98122 Contact: Don Helling, PE (206) 324-5500 3 558 1� - W � H�iI1T-7�)LL=�Z� HUITT-ZOLLMS,INC. • 814 E.Pike Street • SeaMe.WA 98122-3893 • 206.324.5500 phane . 206.328.1880 faz • huitt-zWlars.can City of Rer�ton P;�nning Div�sior �', Table of Contents I TECHNICAL INFORMATION REPORT r n�n � W��L V �LUJ Section 1 - Project Overview Page 1 Section 2 - Conditions and Requirements Summary Page 2 Section 3 - Offsite Analysis Page 5 Section 4—Retention/Detention Analysis and Design Page 14 Section 5 - Conveyance System Analysis and Design Page 15 Section 6 - Special Reports and Studies Page 15 Section 7—Basin and Community Planning Areas Page 15 Section 8 - Other Permits Page 15 Section 9 - CSWPPP Analysis and Design Page 15 Section 10 - Bond Quantities, Facility Summaries, and Declaration of Covenant Page 17 Section 11 - Operations and Maintenance Manual Page 17 Referenccs Page 18 FIGURES REC��" � Figure 1 TIR Worksheet(2 pages total) �� , Figure 2 Site Location Map APR 1 � 2010 �, Figure 3a General Site Drainage Map—Existing Conditions ��111 R�� Figure 3b Regional Drainage Map Figure 4 Flood Map Figure 5 Drainage Complaint Map Figure 6 Landslide Hazard Area Map Figure 7 Soil Map (3 pages total) Figure 8 Off-Site Analysis Limits Figure 9 Off-Site Analysis Details �:��Soy3�u r�.w�,�a�Tiana E��a��,o6�..�ap�;iTiR i DRAFT 4/9/201 B - � HU(1T-7SJLLA,RS ! HUITTdOLLARS,INC. • 814 E.Rke Streel • Seatlle.WA 46122-3893 • 206.324.5500 phone • 206.328.1880 fax • huBt-zdlars.com Figure 10 Site Hydrology Figure 11 Preliminary Drainage System Schematics Figure 12 Preliminary Drainage System Details APPENDICES II Appendix A Offsite Analysis Supporting Documentation , Appendix B Runoff Calculations ��, Appendix C Conveyance Calculations and Supporting Documents I Appendix D Alternative Drainage Proposal I�� J��,1�093=01��Wond�rland Estat�s�96'�A riITIR 11 �R�FT��9�2�1� P NWTT-ZOLLARS,��NC. • Btd E.Pike Street • Seattle.V!A 98122-3393 . 206.32<5500 phone . 206.328.1880`aY • ��I*,-zollars com SECTION 1 PROJECT OVERVIEW This Technical Information Report (TIR) describes the stormwater management facilities for the Wonderland Estates (WE) project. This report has been prepared in conformance �vith City of Renton codes and the 1990 King County Surface Water Design Manual (see Figure 1- TIR Worksheet, for project summary information). The project site is located at 14645 SE Renton-Maple Valley Road (SR 169) in Renton, Washington (Figure 2). The project site surface area is approximately 12.2 acre (531,800 square feet). This lot has been developed as a mobile home park since 1960. This project proposes replacing existing utilities (storm drain, sanitary sewer, water, electrical) and replacing existing asphalt roadways. The project will create no net increase in impervious surface. A net reduction in impervious surfaces will result from narrowing the roads and removing an obsolete tennis court. EXISTING CONDITIONS As shown in the general site drainage map (Figure 3a), on-site stormwater generally tlows south to north/northwest toward SR-169 and the northwest corner of the site. Altered topography due to construction of SR-169 to the north and Pioneer Place to the west has resulted in the need to pump runoff from the site. Watercourses in the area include Madsen Creek, a bypass channel of Madsen Creek, and a roadside ditch/swale system that conveys road runoff and site drainage to the west along the south side of SR169. Figure 3b shows the regional drainage system and the relation of the site to the various watercourses. ��ladsen Creek is a Class 2 salmon-bearing stream that parallels the northeast edge of the site before crossing under SR-169 to the north in a culvert near (east o� the site entrance road. The Madsen Creek bypass channel flows to the north along the east site boundary. It diverts high flows by means of control structures located in the King County detention pond located near the southeast corner of the site. The roadside swale system (with a few driveway/entrance culverts) continues to the west for about 1,500 feet before discharging into an intermittent watercourse tentatively identified as a Class 4 stream (called "Stream A" in this report). All three watercourses discharge to the Cedar River. The natural drainage patterns appear to have been significantly altered, especially by the construction of SR-169. The natural location for drainage under current conditions appears to be offsite to the swale system to the west along SR-169. However, the flow capacity of this swale system has been compromised by construction of frontage improvements associated with Pioneer Place. The exsting on-site drainage system collects stormwater runoff by gravity flow in a pipe network and pumps low flows to Madsen Creek at the two locations shown on Figure 3a. During high runoff events, the two pumps (capacity 0.3 cfs each) are incapable of matching peak runoff rates and runoff ponds in the northwest portion of the site before 1:'�15093�OC�Wonderland Estatcs��06'�_AprilTlR 1 ��F7'��9�2�18 � t-��ii � I�.�L�=�� HUITT-ZOLIARS,INC. • 814 E.Rke Street • SeaWe,WA 98122-3893 . 206.3245500 phone • 206.3281880 fax . huitt-zollars.com discharging to the swale system to the west. The combined pumping capacity of 0.6 cts is less than half the 2-year peak runoff from the site (see Section 4 for hydrology computations). The condition of the roadside swale at the northwest corner prevents efficient discharge at this location, and runoff floods onto the adjacent property (Pioneer Place), where homes are impacted before runoff enters the development's drainage system. Madsen Creek floods onto the site at the location of the cuirent pump discharges, impacting roads and some of the structures in the north end of the site, and Pioneer Place adjacent to the site. Madsen Creek flooding at this location is most likely caused by reduction in channel conveyance capacity due to sedimentation in the channel, which has resulted in the partial blocking of the box culvert under SR-169 and a culvert under 149`" Avenue SE downstream of the site. During Madsen Creek flooding, pumping to Madsen Creek results in re-circulation of site runoff back onto the site. PROPOSED CONDITIONS The project proposes to maintain the current drainage configuration of pumping to Madsen Cree�th higher flows continuing to discharge to the swale_leadin�_to_Stream � A: -----� - __ Regrading in the northwest corner of the site will be used to create flood storage volume and reduce the potential of flooding on-site structures. The onsite flow characteristics of the existing site would not be altered, except for replacing sheet flow with pipe flow over a short distance. The previous March 16, 2010 draft of the TIR proposed discharging all site runoff to the swale system and eliminating the pumped discharge of low flows to Madsen Creek. This alternative approach was not approved by the City. Appendix D contains a copy of the City's "On-Hold Notice" for that alternative proposal, and a copy of the Huitt-Zollars response to the issues raised in the On-Hold Notice. SECTION 2 CONDITIONS AND REQUIREMENTS SUMMARY The project is located adjacent to Madsen Creek, which is classified as a Class 2 stream on City of Renton's Critical Areas Maps. The project is therefore subject to drainage review with applicable requirements as summarized below: Core Requirement 1: Discharge at�'�'att�r�al Location As described above, the natural discharge location is ambiguous, due to the alteration of the drainage pattern, especially due to the construction of SR 169, which presents a hydraulic barrier for all runoff and stream flow from the area south of the road. The project �vill maintain the current discharge location and pumping rates. �:��.�soy�zur�.w��a��id�a E.rar�s�.oe��..ap��iT�R 2 DRAFT 4/9/201�� Hu«z��, HUITT-ZOLLARS,INC. • 814 E.P'ike Steet • Seatlle,WA 98122-3893 • ?�5 324.SSuC pMne • 206.328 1880 fax . hwtt-zo��lars com Core Requirement 2: Offsite Analysis Level 1 Offsite Analysis has been performed as required and is documented in Section 3 below. Core Requirement 3: Runoff Control The parcel is in the category of"No Existing Approved Drainage System." Therefore, "existing conditions" for purposes of drainage analysis and design are defined as those pertaining prior to May 1979. The parcel was developed to its approximate current condition in the 1960s. Peak rate control is not required because the project proposes less than 5,000 square feet (st� of new impervious surface. Biofiltration or other runoff treatment is not required because the project does not create more than 5,000 sf of new impervious surface. Core Requirement 4: Conveyance System All standards from the KC SWDM apply. The project is seeking a variance to allow a pump system with a smaller storage capacity than 25% of the 2-year, 24-hour runoff. The reasons for this request are as follows: • The existing conditions use a pump system, without such storage; • Due to drainage alterations by others (e.g., SR-169), discharge to Madsen Creek is not possible without pumping; • The requirement would result in a large, expensive storage structure (it would need to be underground) that would not provide additional downstream flooding protection over the proposed structure; • Overflow from the proposed system (in the hypothetical event of pump failure) will be conveyed in the swale system without inundating or overtopping any road, or flooding any part of a building. Core Requirement S: Erosion and Sediment Control All standards from the KC SWDM apply. Section 8 describes how the TESC and CSWPPP plans meet these standards. Core Requirement 6: Maintenance and Operations O&M manuals are provided (Section 11) for all stormwater facilities. �:.i;oy;�or.w<,�,��ria�,a E,<<u��o�,,��;iT►R 3 DR9FT 4/9/201� i a i. f t i i r_s .-�iwL. �i3 � HUITT-ZOLLARS,INC. • 814 E.Pice Stree� . Seame,4VA�122-3893 . 206 324 55�0 phone . 205 328.1630`a�c . huitt-zdlars com Core Requirement 7: Bonds and Liabilitv To be determined: Special Requirement 1: Critical Dr•ainage Areas The King County parcel maps, Figures 4, 5 and 6 indicate the following: • A portion of the parcel is located within the mapped 100-year floodplain the Cedar River. The strip of floodplain is associated with Madsen Creek as it flows west adjacent to SR-169. The parcel is outside the floodway. • The parcel is shown as being in a"moderate" drainage complaint area. • The parcel is outside shoreline jurisdiction. • Madsen Creek adjacent to the parcel is a Class 2 salmonid stream per the SAO • The southern portion of the site is mapped in a Landslide Hazard Area as defined by the KC SWDM Special Requirement 2: Compliance il�ith an Existing Master Drainage Plan Not applicable. Special Reqi.�irement 3: Conditiofzs Requiring a Master Drainage Plan Not applicable. Special Requirement 4: Adopted Basin or Community Plans The Lower Cedar River Watershed Plan contains no additional area-specific requirements beyond those contained in Renton Code and the KC SWDM. Special Requirement 5: Water Qualitv Controls The proposed new impervious surfaces are less than 5,000 square feet; therefore water quality treatment is not required. Special Requirement 6: Coalescing Plate Oil/Water Separators The proposed impervious surface is less than 5 acres; therefore oiUwater separation is not required. Specic�l Reqttirement 7: Closed Depressions The project does not discharge to a closed depression; this special requirement does not apply. �:��i;o93?o��w�„d�riand E��ares��u6�,.apr�iTiR 4 DRAFT 4/9/2019 Nl.II1T-7SJLLARS HUfTT-ZOLLAF2S.INC. • 814 E.Pike Street • Sealtle,WA 98122-3893 • 206.324.5500 phone • 206.328.1880(2z • huitt-zdlxs.com Special Requirement 8.• Use of Lakes, Wetlands or Closed Depressions for Peak Rate Control This requirement does not apply to this project. Special Requirement 9: Delineation of 100-Year Floodplain This project does not propose development or encroachment in the 100-year floodplain, as mapped by King County(see Figure 4). Delineation of the 100-year floodplain is not required. Special Requirement 10: Flood Protection Facilities for Type 1 and 2 Streams No flood protection facilities are required or proposed. Other Adopted Area-Specific Requirements—None Identified. Special Requirement I1: Geotechnical Analysis and Report. None required. ', Special Requirement 12: Soils Analysis and Report: None required. Soils are as mapped in Figure 7 and described in Section 4 below. Special Requirement 13: Aqa�ifer Protection and Recharge Areas The parcel is in a Category 1 Aquifer Recharge Area. No discharges to groundwater are proposed. ', SECTION 3 �� OFFSITE ANALYSIS As determined by the City during pre-permit application discussions, a Level 1 Offsite Analysis is required. The following resources were reviewed/consulted as part of the Level 1 Offsite Analysis : • County critical and sensitive area maps • FEMA and County floodplain maps • County drainage complaint maps • Available drainage reports J:��1i093?O]`Wonderland Est�tes'�06'�ApriITIR � ��QF7'��9�2�1 B N�� I7-I��L�-�� __ - _-- - HUITT-ZOLLPRS.INC. • 814 E.Pice Streel • Seattle,WA 98122-3693 . 206.324.5500 phone • 206328.1880 fau . huAt-zoilars.com Field inspections were performed on Sunday, December 20, 2009 and Monday December 28, 2009 by Chuck Manning, PE of Huitt-Zollars. Appendix A.2 contains representative photos taken during the field inspection. Information (photographs and field survey) by Huitt-Zollars personnel was also used in the analysis. The Offsite Analysis Drainage System Table (Appendix A.1) was prepared on the basis of the resources review and the field inspections. Figure 8 shows the extent of the study area and location(s) of some of the illustrative photographs. Figure 9 shows the locations of drainage issues identified in Appendix A.1 and of the remainder of the photos referenced in this report. The photos in Appendix A.3, taken over a series of dates beginning in January 2009, are included to illustrate offsite and on-site drainage conditions, during both low flow and high flow conditions. The offsite analysis encompasses the upstream tributary area and two downstream conveyance systems, as described below. Unstream Tributarv Area It appears that little offsite runoff drains onto the Wonderland Estates site, as illustrated in the study area map (Figure 8). A small portion of the steep, forested hill to the south drains toward the site. This area is heavily forested and produces little runoff. A small "duck" pond located near the southern site boundary receives runoff from the small offsite area, and from a seepage interceptor trench located along the base of the steep slope. Photos 1 and 2 in Appendix A.2 illustrate the offsite area and the duck pond. A significant feature affecting flow in Madsen Creek through the site is the King County detention pond on Madsen Creek located near the southeast corner of the site (see Figure 3). The pond traps sediment and diverts high flows to the Madsen Creek high-flow bypass channel. The pond and outlet control/diversion structures are illustrated in Photos 3-8 in Appendix A.2. Lower flows are discharged from the pond from 42- and 24-inch diameter CMP culverts (Photos 5-6). The larger culvert has been fit with a control plate over the top 1.5 feet of its diameter. The bypass weir structure elevation is such that overflow will begin to occur when the water surface is at a depth of 34 inches on the 42- inch culvert, or about 4 inches over the top of the culvert opening. Photos 9-13 illustrate conditions in the bypass channel downstream of the sediment pond. There are no apparent flow constrictions in this channel. The project does not propose to discharge to this channel. There is,however, apparent capacity in this channel. Under current drainage conditions, storm water runoff is pumped to Madsen Creek at the locations shown on Figure 3. When Madsen Creek is flooding, due to conditions in the rest of the basin, the pumped stormwater from Wonderland Estates adds to the flooding condition. Runoff accumulates on the property until a sufficient elevation is attained, at which point it exits the property at the northwest corner of the property via a ditch flowing to the west along SR -169. Two downstream flow routes are therefore described in this analysis: Madsen Creek and the SR-169 swale system. J:'•1ip93?O1`,�b'ondcrland E;tat�s'06'ApriITIR 6 DRAFT 4/9/201@ HLITT-ZOLLARS,INC. . 814 E.Pike Street • Sea!tla VJA 96122-3893 • 206.324.550C phore • 206.328-1680 fax . huitt-zdlars.com Downstream Analysis Two drainage courses receive runoff from the site: Madsen Creek as it parallels the northeast site boundary between the site and SR-169, and the roadside ditch/swale system �I� that conveys road runoff to Stream A to the west along the south side of SR-169. Both I� systems receive runoff from the site under existing conditions. The project proposes to maintain existing discharge rates and volumes to each system. The two drainage courses are described below. Both ultimately discharge to the Cedar River. Lower Madsen Creek Despite the flow control provided for Lower Madsen Creek by the high flow bypass system described above, Madsen Creek at and below Wonderland Estates continues to experience flooding. Photos 14-20 illustrate conditions in Lower Madsen Creek adjacent to Wonderland Estates. Under high flows such as those experienced in January 2009 (the result of rainfall estimated to be between the 10- and 25-year recurrence interval event), Madsen Creek floods onto the Wonderland Estates property. Water pumped into Madsen Creek from the site cannot be accommodated by the channel at the site, and exacerbates the flooding. Water builds up on the Wonderland Estates site until it reaches an elevation at which it can follow the pathway to the west at the NW corner of the site. Because the drainage of the swale system offsite at the northwest corner of the site has been altered (by others), the swale system cannot accept the overflow and runoff flows into the NE corner of Pioneer Place, threatening homes and adding flow to the Pioneer Place detention system for which the system was not designed. Photos 14-16 show Madsen Creek in high flow and dry conditions as it crosses under the high flow bypass channel and enters the site. Photos 17-20 illustrate Madsen Creek as it flows adjacent to the site and the inlet to the box culvert that conveys Madsen Creek under SR-169. Figures 21-23 show the culvert under 149`�' Avenue SE that is submerged even under lower flows when there is no flow in the bypass channel. Figure 24 shows Madsen Creek from the bridge in the Regis Park access road. Flow appears to be restricted by sediment buildup in the box culvert and in the Madsen Creek channel downstream of the bridge over 149`�Ave SE. The following discussion describes each of the drainage elements identified in the Offsite Analysis Drainage Table in Appendix A.1. It should be noted that Madsen Creek floods under the existing drainage configuration, due to factors beyond the control of Wonderland Estates. Drainage Element MI (see Photos 14-20, 'S, ?6) Madsen Creek in the vicinity of Wonderland Estates is mapped in the 100-year floodplain (Figure 4). Madsen Creek appears to flood primarily due to fine sediment buildup in the channel downstream of the site, including the box culvert under SR-169 (see discussion of M2, M3 and M4 below). During low flow conditions (when the Madsen Creek high tlow bypass is not flowing), the Creek appears as it does in Photos 15, 17 and 19, with a �:��.�su93zoi��w�,nazria„a e��ates�,oe�,.�p��iTiR 7 DRAFT�l/9/201a HUITf-ZOLLARS,INC. • 614 E.P��ke Street . Seattle,WA 98122-3853 . 2D6.324.55D0 phone • 206.328.1680 fax . huitt-zollars.can freeboard of about one foot before flooding onto Wonderland Estates starts. High flow conditions are shown in Photos 14, 16, 18 and 20. As can be seen in Photo 14, the headwall for the box culvert under the high flow bypass channel backs up water behind the box culvert. The outlet to the box culvert is completely submerged (Photol6) as is the entrance to the box culvert under SR-169 (Photo 20) under these conditions, probably reflecting the translation of downstream restrictions upstream. Figures 25-26 illustrate the aftermath of the January 2009 flooding in Wonderland II Estates. � Drainage Element ILt? (see Photos 19-20) �� The Madsen Creek culvert under SR-169 is an 8 feet by 6 feet (width by height) concrete box culvert. Measurements at the upstream end of the culvert (location of photos), indicated that the culvert opening is free of sediment. However, the downstream outlet of the culvert is blocked within about two feet of the top of the culvert. Flow restriction due to sedimentation in the lower channel, as the grade flattens north of SR-169, is the likely cause. As noted in the Madsen Creek Tributary Erosion Stabilization Projects, Biological Assessment (Adolphson Associates, 2001, prepared for King County Department of Natural Resources) the sediment transport capacity of lower Madsen Creek has changed due to operation of the high flow bypass channel. Cutting off the high flows has resulted in the deposition of fine sediments (sand) not trapped by the detention pond being deposited in the lower channel north of SR-169. These deposits result in lower channel hydraulic capacity and backwater flooding in the vicinity of Wonderland Estates. Drainage Element M3 (see Photos 21-23) M3 is a metal culvert conveying Madsen Creek under 149`h Avenue SE north of SR-169. The dimensions of the culvert are not known. The culvert as measured in the field is an arch with a maximum depth of depth observed in the field (December 20, 2009) of 1.8 feet and a width of about 7 feet. As shown in the photos, even during low flow conditions both the upstream and downstream ends of the culvert are submerged by about 0.5 feet (2.3 feet water depth). Drainage Element M4 (see Photo 23) The Madsen Creek channel immediately downstream of M3 is a uniform 9-feet wide channel with a bottom of almost uniformly sized sand. The depth of flow 10 feet downstream from M3 on December 20, 2009 (low flow) was 0.9 feet, 1.4 feet less than at � the bridge. The deposition below 149th Ave SE is the apparent cause of the submerged � conditions at M3. �� :��iso93�oi��wona�ia�a e5�at��,o6��,np�iT►R 8 DRAFT 4/9/201� 1 t�(��L_��l_�� __ ____� _ HUITTdOLLARS,INC. . 814E.PikeStree[ . Seatlle,WA98122-3893 .__,.___..�______..___.____._._._._ • 206.324.5500 phare • 206.328.1880 faz . huitt-zollars.com Drainage Element MS (see Photo 24) The bridge over Madsen Creek as it passes under the access road to Ron Regis Park does not appear to restrict flow. The flow opening under the bridge low chord is 15 feet wide. There was 1.3 feet of clearance between the flow in the Creek on December 20, 2009 and the bridge chord, when the flow depth was a maximum of 1.2 feet. Fine sandy sediments characterize the creek bottom at this location as well. In general, the condition of Madsen Creek in the vicinity of Wonderland Estates is such that no type of onsite flow control at Wonderland Estates can alleviate either on-site or downstream flooding. Based on this assessment, quantitative (backwater) analysis of the flow conditions in lower Madsen Creek was not deemed useful and was not performed. Drainage Element M6 Madsen Creek broadens and flows through a wetland complex paralleling the Cedar River. The proposal will not affect flows to this wetland. Drainage Element 11�17 This section of Madsen Creek is the channelized segment leading from the wetland to the confluence with the Cedar River (confluence illustrated in Photos 41 and 42). Note that the mouth is perched about 3 feet above the Cedar River water level (observed March 10, 2010). The Cedar River has eroded its left bank in this area since 2001 when the main flow of the River was diverted to this old side channel following the 2001 earthquake- induced slide that blocked the main channel. The old lower channel of Madsen Creek, along with some Park trails, has been cut off, resulting in the mouth of the creek being located further to the east than it was prior to 2001. SR-169 Swale Svstem The SR-169 Swale conveys road runoff and some site runoff to the west, parallel to SR- 169 along the south side of SR-169, where it enters Stream A (probably a Class 4 stream) coming from the south. The channel crosses SR-169 to the north in twin 24-inch diameter CMP culverts. The stream then flows west along the north side of SR-169 before turning north through two 18-inch culverts (in series) and continuing north between Regis Park and the Maplewood golf course. Photos 27-43 illustrate conditions in the roadside swale and downstream in Stream A. The following narrative describes the conditions observed during the site visits and listed in the table in Appendix A.L I � J:��,iso93�or��wonaeriana e�ra<<S��o6��prilTiR 9 DRAFT 4/9/201� i HUITT-ZOLLARS'�NC. . 314 E?�ke Street . SeatGe:Y.4 98122J853 . 2C6 32C 5500 prcre • 2C6.328.'830`ar . ��iT.-zcl��ar;.can Drairzage Elerraerrt SI (see Photos ?7, ?8, arzd 30) This 12-inch pipe is located adjacent to the northwest corner of Wonderland Estates. It is intended to convey road runoff and Wonderland Estates runoff under the Pioneer Place sidewalk to the west along SR-169. Huitt-Zollars field survey indicates that the culvert is laid at an adverse slope, with the west invert at an elevation of 99.63 feet and the east invert at an elevation of 99.57 feet. The topographical low point on the Wonderland Estates property is 98.5 feet at a catch basin rim in the northwest part of the site (see Figure 3) and at the fence at the northwest corner the elevation is 99.67 feet. Because of the elevation difference between the on-site low point and the pipe invert, runoff must pond on-site at least 1 foot before drainage to the west occurs. Drainage Element S2 (See Photos 29 and 30) S2 is a shallow, wide vegetated swale leading to the west, with an average bottom width width of about 10 feet and an estimated slope of 0.4%based on the road grade. Drainage Element S3 (Photo 31) S3 is an 18-inch diameter concrete pipe under an unused access road. Drainage Element S4 (Photo 32) S4 is the trapezoidal swale downstream of pipe S3. It has similar characteristics to S2. Drainage Element SSa and Sb (Photo 33, 34) SS is a 12-inch diameter, 311-feet long steel pipe under 145`" Avenue SE (the entrance to Pioneer Place). The first section (SSa) empties into a manhole in the middle of the street. Section SSb continues from the manhole to discharge to the vegetated swale (Element S6). Drainage Element S6 (Photo 35) S6 is a shallow triangular grass-lined channel. Its original geometry may have been altered by grading associated with the construction of the Pioneer Place detention pond. Dr-ainage Element S7(Pltoto 36) S7 is an 18-inch diameter concrete pipe that discharges the roadside swale runoff to Stream A. Drainage Element S8 (Photo 37) S8 consists of twin 24-inch CMP culverts conveying Stream A under SR-169 to the north. �:�i;o93�oi��.w�„a�r��„s ES�a��06��.�pr+iTiR 10 DRAFT 4/9/2010 ;! � ;a ; ; � �J,'T-ZOLJ+RS INC • 8'4 E Pke Street • Seattle�rA 58122 3d93 • 20"0?24 5500 phone • 200 328 1380 fax . huiR-zollars�om Df-ainage Element S9 (Photo 38) S9 is the large swale along the north side of SR-169 leading to the west. The bottom width varies from 4-5 feet, with typical sides slopes of 3H:1 V. The depth from the edge of the trail pavement to the bottom of the swale is typically about 3.5 to 4 feet. Drainage Element S10 (Photo 39) Stream A is conveyed under the Cedar River Trail and an abandoned Park road in a series of two 18-inch diameter CMP culverts. Drainage Element SI1 (Photo 40) The system downstream of S 10 is an open channel. At the outlet of the second culvert, Stream A is a wide shallow channel with sideslopes overgrown with blackberries. The channel bottom width is about 4 feet, with 4H:1 V side slopes. The defined channel is about 1 foot deep, with the overbanks forming a broader flow path to the north, with the left overbank about 40 feet wide and the right overbank about 100 feet wide. The Stream A channel is blocked by the park road/trail that parallels the stream on the east and turns across its path to the west. The trail in this area is at an elevation of 90.4 feet (NAVD 88) and forms a hydraulic barrier to further flow to the north toward the Cedar River. Discharge to the north has been blocked, probably due to grading associated with earthquake/slide response after 2001. Backwater analysis using the King County Backwater program (KCBW was performed on Stream A and the swale system, as described in the March 16, 2010 Draft TIR. The analysis showed that drainage element S 10, the 18-inch diameter CMP culvert under the Cedar River Trail, restricts the 100-year runoff to an extent that causes flooding over the trail. Upgrading the capacity of element S 10, and restoring the outlet of Stream A, which would produce lower tailwater elevations, would reduce the potential for flooding in the Stream A system. The backwater analysis also showed that element S5, the 12-inch pipe under the Pioneer Place entrance road, is undersized for the 25-year runoff event. SECTION 4 RETENTION/DETENTION ANALYSIS AND DESIGN This section describes runoff analyses for the on-site sub-basin (named Sub-1 in the model) and the road sub-basin (named SR169 Basin 1) that contributes to flow in the roadside swale system. The commercial stormwater modeling software StormNet was used to compute peak runoff rates and volumes. The model implements the SBUH method and uses the Type 1 A rainfall distribution, with 6-minute time steps. �:�i;oe;�oi��wo�,ae�i��,d E,�a�es�o6�,apr;iTiR 1 1 DR4FT 4/9/201� H�IITT-7��LLARS HUI1T-ZOLLARS,INC. • 814 E.Pice Street • Seatlle,WA 98122-3893 • 206.324.5500 phone • 206.328.1880 tax . huiG-mNars.com The design storm volumes used were obtained from the KC SWDM isopluvials and are , shown in Table 4.1. Table 4.1 24-hour desi storm rainfall ma itudes, inches Return Interval, ears Rainfall Ma itude, inches 2 2.0 10 2.9 25 3.4 100 3.9 Flow lengths, and conveyance roughness values used in times of concentration computations, as well as computed times of concentration, are shown the StormNet reports. PART A EXISTING SITE HYDROLOGY The existing conditions are those as of 1979 (per the KCSWDM). Table 4.2 Existin Site H drolo Summa Land Use Area, acres % Area Impervious Impervious, acres On-site Basin Sub-1) Sin le-Famil 7 dwellin s/acre* 5.25 56** 3.94 Roads 2.98 100 2.98 Other Im ervious 0.66 100 0.66 Forest 1.30 0 0 Grass/landsca e 2.0 0 0 , Total 12.2 62 7.58 ' * assumed ** assumed from KCSWDM based on land use Soils on site are mapped as predominantly"Urban Land" (Figure 7). The steep forested slopes in the southern portion of the Estates are mapped as Alderwood and Kitsap Soils, while the area on the flatter slopes surrounding the Estates is mapped as Newberg silt loam. The flatter area of the Estates is assumed to be Newberg silt loam based on the soil map. Table 4.3 shows hydrologic properties of site surface soils. j 1:\15093201',Wonderiand Estates\06'�,Apri1TIR I Z DRAFT 4/9/201� �` �3 ; � `. ; i�_ ft t – i i_ ai._'; � �_---- ---� __ ___� --- — HUITT-ZOLLARS,INC. • 814 E Pike Street • Seattle,VJA 96122 3893 . 206.3245500 phone . 206 3281880 faz • huitt-zollars.com Table 4.3 Site Soils Land Use Soil HSG CN Area, % Area acres Impervious Impervious, acres Single-Family 7 Newberg B 98 2.94 56** 3.94 dwellin s/acre* 80 2.31 Roads Newber B 98 2.98 100 2.98 Other Im ervious Newber B 98 0.66 100 0.66 Forest Alderwood/Kitsa C 76 1.30 0 0 Grass/landsca e Newber B 80 2.0 0 0 * assumed ** assumed from KCSWDM based on land use A composite CN of 81.9 was computed for the site using the data in Table 4.3. PART B DEVELOPED SITE HYDROLOGY Developed site hydrology is modeled conservatively as being the same as existing hydrology. In reality, some impervious surfaces will be removed (4,550 sf tennis court in south portion of parcel; roads will be narrowed slightly). For assumptions and parameters, refer to Part A above. HYDROLOGIC RESULTS Because existing and developed site hydrology is considered the same for this project, the results are the same and are presented in Table 4.4 below. Table 4.4 H drolo ic Model Results Basin Area, Return Interval,years acres 2 10 25 100 Peak Runoff Peak Runoff Peak Runoff Peak Runoff Rate, cfs Rate, cfs Rate, cfs Rate, cfs On-site Sub-1) 12.2 1.44 3.36 4.52 6.42 StonnNet output reports for each return interval are included in Appendix B. PART C PERFORMANCE STANDARDS There is no applicable area-specific tlow control standard or water quality control standard. �:��i;oy��o��w�,ndrria�,d e,��5��oe��a.p«iT�R 13 DRAFT 4/9/201� �--ii i� � �— I/ �� , FOITTdOLLARS.'�NC. • 614 E.'ike Stree[ . SeaNe,r!A 98122-3893 . 200.324 5500 pnone . 205 326.1380 fax . huis-xollars.r.om The conveyance capacity standards are as follows: _. • Pipes designed for 25-year, 24-hour storm; • Structures to have 0.5 ft freeboard for 25-year storm � • For the 100-year runoff, pipe surcharging and overland flow is allowed under the following conditions: o Runoff is contained within defined conveyance system elements without inundating or overtopping the crown of a roadway, AND/OR o No portions of a building will be flooded, AND/OR o If overland sheet flow occurs, it will flow through a drainage easement or covenant. PART D FLOW CONTROL SYSTEIVI No flow control system is required or proposed. Current discharge rates to Madsen Creek and the swale system are to be maintained. PART E WATER QUALITY SYSTEM Not applicable; water quality facilities are not required for this project. ' SECTION 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN Figure 11 illustrates the preliminary drainage system schematic. Pipes P1, P2 and P3 are conveyance laterals on a 1% slope. Each storm lateral will convey approximately 1/3 of the 25-year site runoff, or 1.5 cfs. Pipe P3 conveys runoff from the east part of the site to the existing pump station near the northeast corner of the site. Flows in excess of 0.3 cfs (maximum pumping rate) are conveyed in the overflow pipe to the Pump Station Storage Pond. Pipe P4 conveys the combined flow of P 1 and P2 to the west pump station. The west pump station capacity is also 0.3 cfs. Pipe PS conveys flows from P 1 and P2 to the west pump station. When the pumping capacity is exceeded, PS carries runoff commingled from the entire site. Flow in PS is limited to the pumping rate, or 0.3 cfs. The system is designed so that when the maximum pumping rate (0.6 cfs) is exceeded, water backs up into the Pump Station Storage Pond. As the runoff peak passes and the pumps catch up, the pond is dewatered. The design capacity of each of the five pipes is shown in Table 5.1. Calculation worksheets are shown in Appendix C. �:��i;o93�oi�.w�,�ae�ia�a ES�ac«�,ob�„ap��iT�R 14 DRAFT 4/9/2019 � H� I�TT 7( �[_L�� _ __ _ HUITT-ZCLLARS.NC. • 814 E.Pike Street • SeatHe'P;A 98122-;893 • 2C6324.55D0 phone • 206.328.1880 f� . huitt-zdlxs.com Table 5.1 Summar Table of Conve ance Ca acit Calculations Pipe Diameter Pipe Slope Required Design Capacity inches % Ca aci cfs cfs) P 1 12 1 1.5 3.83 P2 12 1 1.5 3.83 P3 12 1 1.5 3.83 P4 12 0.75 3 3.32 PS 12 0.75 3 3.32 All of the 12-inch pipes have sufficient capacity. SECTION 6 SPECIAL REPORTS AND STUDIES No special studies beyond those described were performed as part of the preliminary design SECTION 7 BASIN AND COMMUNITY PLANNING AREAS No basin or community planning area requirements apply. SECTION 8 OTHER PERMITS Grading Permit NPDES Construction Stormwater General Permit SECTION 9 CSWPPP ANALYSIS AND DESIGN There are no areas of particular susceptibility to erosion. The steep slopes in the southern portion of the property will not be disturbed. Part A ESC Plan Analysis and Design 1. Clearing limits No clearing��ill be required. J:'J�093'_'U L'�Wondcrland Estatt5�06',ApriITIR 1 J �R�F7'��9�2�1 B � f L�� ' � 4''�, HUITT-ZOLLARS,INC • 814 E Pike Street • Seattle,6^!A 98122-3893 . 206.324.5500 phone • 206 328.1880 fa�c . hmmzollars.com 2. Cover measures Cover measures will be employed for all soil and material stockpiles that are potential sources of pollutants in stormwater runoff. 3. Perimeter protection Silt fences and/or straw wattles will be used at all downslope locations along the perimeter. Note that the site is lower than most of the surrounding area, and does not drain naturally except during heavy rainfall. 4. Traffic area stabilization Suitably stabilized site entrances exist at the site. 5. Sediment retention Not necessary due to site topography. Storm drain inlets will be protected. The detention pond associated with the pump system will be used for temporary sediment retention. 6. Surface water collection Surface water will flow by overland flow during system construction. 7. Dewatering control Water generated by dewatering will be treated, if necessary, and discharged at an approved location. 8. Dust control Dust control will be provided using water, as necessary. Water will be applied in amounts that will minimize runoff. 9. Flow control Flow control will be provided by the project's current flow control facilities. Part B SWPPS Plan Design Potential pollution generating activities are limited to soil disturbance, the operation of equipment, and the storage of materials associated with the equipment. Appropriate materials storage and handling BMPs.will be specified. The proposed receiving water is the roadside swale leading to an intermittent, Class 3 stream. There are no special water quality issues associated with this water course. 1:`,15093?O1`,�Vondertand Estates'�u6'�Apri1T[R 16 D�F'7'4/9/2�18 !� �# T F . '1� r i l i.. HUITT-ZOLLA.RS,iNC. . 614 E?ike Street • Seactle'JJA 981223�C93 • 206.32d 5500 phcre . 206.326'880 far . huitt-zdiarscom SECTION 10 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT I To be provided with final TIR. II SECTION 11: OPERATIONS AND MAINTENANCE MANUAL To be provided with final TIR. �:��.�so93�o��.wonderiand e�tat��.o6��,.apr;�T�a 17 DRAFT 4/9/20IU _,_ _ _ • ��a..;_ .,.. . .__- .:,�� a�� o-_-. . -� - �.'a< . r_ -_. �__LA.,, ,., . _ "e'7ae: _ `-- -- _ .__ . _ e.>._� REFERENCES Adolphson Associates, Inc. ?001. ��Iadsen Creek Tributary Erosion Stabilization Projects Biological Assessment, prepared far King County Department of Natural Resources Chow, 1949. Open Channel Hydraulics ESM, 2005 Final TIR for Pioneer Place. King County Surface Water Design Vlanual, 1990 King County iMap,http://www.kin cg ounty.gov/operations/GIS/Maps/iMAP.aspx accessed November, 2009 NRCS Web Soil Survey, http://websoilsurvey.nres.usda.�ov/app/WebSoilSurvey.aspx, accessed November, ?009 �:��i soy��o i�wonatria�,a ES��<<s�ob�np�iriR 18 DRAFT 4/9/201� Pap.� aZ , Kinp County BuN�n�and Lsnd D�wbpnNr�t DNisbn TECHNICAL INFORMATION REPORT (TiR) WORKSHEET ' - . . . - . . . .� � . . Projec;tOwr�r Klw�r tAuul`� '�a1t�1µF �tklfb� projactName MlNv�q�N� EfT�t'4ES U'�lltT� Acidress �0 0 �N D�Y� jA1tIC wE 4 T T,7,1�ItM/ll.k Loca�on �� p f��2JL) S7�l- l 1 q'S TownsNp 2� N. prpj�E�� DOM �Lll+t�r" Rarg� S E . g�ion 2 2 � 1�i_ Comp�ry ��T-2r{.t.�t� f �►•�c • p�ec:tsizs AC 1 Z• 2 IW�Pnww 8�i E P,Zr.E_�T4Er�Tl� cJpsa.an,orai�,Q,eian 31z. �c . . . � . C� Su�p^ O ooFi�G HPA O �•�•�•m�r►t , O snoh subavi.ion 0 �� O Rodc«y 0 �� C� DOE Dam Saby 0 Slrudurai VauKs p comn,«dai L ' �F�;r, O olMr � Otl� C/�17TCAt. �It'6cENl'ihl�l 0 OOE Wetlands � HPA • • � .• : � Communiy LI f^� ►F �'T�N orainay�Basin Lo W E 1� t�E� R1 v5t- 0 River __ � Flaodplai� � Sb�am MI�O�EN �R�'E� � W�tlard� o c,�sr�,A..a, a s«�s�. O o.pr.sstonrswai.s p figr,(3roundwalKTab1. O Lake Q GroundMralK R.chaig. �1 S�P�P�+ � Otlwr 0 L,ak�sidvEro�ion Flazand . Soil Type Slopes Erosion Potential Erosive Velocities URRIF►J (ut� tN�wSf_i�SttT �.o�N�K�) �?r ��.�lr+►T �.o€�W� � ��^ �tyEME K�TS�rP �M�F) 1 � � Additland Shs�ts Attatched 1/90 �ap.saz Kinp County Bulldinp and Land DwMopm�nt DNlslon TECHNICAL INFORMATION REPORT(T!A) WORKSHEET ,I . • • . � � REFERENCE LIMiTATIOWSITE CONSTRAINT � Ch.4-Downstream Analysis a a 0 0 0 � Additional Sheets Attatched . . . � MINIMUM ESC REG�UIREMENTS MINNAUM E3C REQUtREMENTS DURING CONSTRUCTION FOLLOWING CON3TF�UCTION ' C�l 3�dirn�nt�Won Faalitiss � Stabili�ExpoNd 9urb� � Stabiiz�d Cornau�tion Entrana � Fi�maw and FNslorr T�mporary E3C FadWi�s � P�rim�bt Runoif Conuol � Ctwn and Fi�rtww All SYt and D�is C� Ci�artn�and GradlnQ RNtrktions � Enwn Op�►a6on ot Prrman�nt Fadlitws � CavK Pradioas 0 Flap Limib of N(iPE3 � Constructlon Spu�no� O Olh�r � Ott�r . � . . . . C� Grass Lin�d ChannN � TaNc O Ir�ation 11ANhod of Maiysis Cgl P�p.�ysam C� vault � �.p�wsion 5 B u+� 0 O�n Chanrnl O Enar�y Dissap�or 0 Flo�►Di�P�s�l CortipensatioNAMiga�ion �l Dry Pond 0 1N�tl�nd L� Waiwr of Eiminabd SiN S�ora� � VNN Pond C� Stnam 0 Fipiona!D�arWon Bri�f D�xiptlon ot 9yst�m Opention Faciiy Rslaf�d 3it�L.Imitatiorr p A�ddlional S1�4 Atwct�d fiNu� Fadliry Umlfaion . . • . .- 0 orainage Easamsnt , a ca.c h Piac.va�c C� oth.r o �oo�s Eaarr�nc � C1 R�wr�irg WaN p w�w ora�wn,Pr�oMcfion Ess«rwnt ',, � Rodary>4'F#ph 0 Trad il O 3tructural on Stesp 3fop� C� oM+er ,, . -. . II I or s avil anginaer u�da� my wparviefon hsw visitad th��A�. Actud 1 I aitr cadf�ons ss obswv�d was i�fcorporNod k�b wis rrohslN�t�nd tM i �wn� To��bat of my knowwd�tM IMoneatlon p�o�Md�d fwn b accurata �wii0r"' 1/9p I t-1'l�ll I 1 /�.�L�;' ' HUITT-ZOLLARS.INC. • 814 E.Rke Street • Sea7e��A 3d'22-�833 • 205 324SSJ0 Dho�e . 2C6 322 1 B60`ac • ��.iri-zdiars con Figure 2 Site Vicinity Map ,�� 1=- _ H yeo sr N�qO ��r Z��. � � _'. � � appp 2 .sT M�]�5�.- !� o � � ti�Q �. � � ,I = t�oA � �sw �r � � � y'� � � � ssrs ,! i ��„ ie � � � '' i � 'tn►er �' �rrw ! ��l og � � ��rR � � � �rrv � � , r � �I �� .�.� x; < _, ��. � � �,r �. _�� .�,� �' � � ,�=_ �sioa ?` �: �,lpw �� aou .if t � � t � s� � �'� '� r' � � :ae�w ��ayr � i. � } �+as�n awew � ��p ��` 3. � � � � swsr s�ar �- ��;_ _ _�i : sars �"i►:��! 6 i s+r�s � � '°�E�, iWlr! � � � !� � � � � �. �� _ . � 4� � +�; f . ``�� '•—�� IT � � .�� ` �` � O ` 4 • � � i ��._ f � t� ��f rM �4 � �—;L , . =�w � � ��R . i -�<_-sEqpprp� :! �4 �; � � f�q --M�RFy�i '�4Y� � �~/ •�Y+ , �� ;' � a ��IMR -�__._.. m � � ~��4 ,�{ #��A � �. 0 � � __--' �brar �►~ � ��q '� =+rra►_. ; ` . Z :aou J ^ � r � .+.�« � ...�� "� � �I ! ....,. .�. � � x � +� ,� � � �� _ , �, � ! � _'"'°,� ti �z .�� s9MF � =tM��A . . � � O / if�p1,�-_�_,V�8FfyR� r � / � ■ " n°"�r � � ■ 4i°_..�" ♦ �� arw�a � „��, � � ;� �'j �,�~ � SE'bllMSf � � �IOfM0. SEWfMFI ICILAKryCwrRy � O Z�MA J:�.15093301'�Won�l�vlund Estatcs�.Oh�.ApriITIR ��FT`��9�201� . � � - - - - - - �'-- - - - - - - - - - - - - - - � i � � � � � , ';�-��'�',i�,°';'.';�� PIME D�VE � � ; '' ; ► � � � g . . ,� , �� ,,,= i,"�'`�.'9, �"`""� ��_,��, „ � � �'��`��'"�� C�. ' � ` _ -';,,- I, � �� I � 1�, c�vmr� � � I � ';� � � ` � ` W.OW(T10P.) � a � t '� 1 �� '� L° �i � " ,. �'y.��,..�'lX�•' `�I � y .,.. . I , :�i/� ,� .. i ��E ` ;�i � ... � "w M1✓� UxVr '� I �� . � �' +).'y ,\� �f' ' �i '�. � �rr� .�+ � �I � ��i �.. '� � �>. -^ � � � -J i.�, . � � 1 � �� `� �r�u�� '..:� PLOW(TttP.) �� ,��' ��, .� � •�, � , - � r . !E/ � EXBFriC3 � � �� /7 i�'�.,,'! f ...� --L � �' t PUbi' \ r'� �. .. i � �,�L' �` � . �14T�'� � `/ �y�p�� i � ~ QM�/f1�G ~ � � �. '__ �� . .. � j / �1 i ��, y \ � � �r ---�:' �/ . . ,�.. ., �� .i�. — - ;� .�-,< ��r' ,' � �i � ��'' ;`' — — — — E �, , '� , , � _ � � � .�. _ , ' �" J_ .. , � " z .. � ��. . _ , , — � �� , � _.. , . ..� __ � �. �, � � , �'I � � . � , � � ,� � / , _ . �'<,.,_' ` ;� �.:.:, '� . , "`� PHEBffilRE ' 1 't_— �� '�' J. ',�� —I � ��'�� 3�II��,�I 1 i , � [%BCFIAFC� � � ,. � '� 1 y —,1�.. ' ;/, � 1 ��ry�� L -+ B�iCi�DF�VE _ _ _ _ __ .- a � ' — — — — — — — — — — ,_ i :�;E,� _ _ _ _-- ., , :,, � ____ — —_ _ ; . r .� -- _ ----- •- -:._.:�_, F� , , .. . .. . . _ ._ __.._. . :3 .. . ......___....... .... _ _... .... i� '{� ,:� `i` WONOERLAND ESTATES � �'� GENERAL SITE DRAINAGE MAP � Figure 3b Regional Drainage Map �" * �' +* ' *' ,t ,�16� , � .�..: r � �� j �'��e'°� �' j. �� " � ,+.i' � '3� � .. w�/��..� �r� f,r� . ...� • �i�,, . . . '.� � ��..� y M , : �� ,y . ,� r��'9 , s`�.,,�.. . Y � � .. � 1` ''� ,�,,w�...: � � �� `^` s t�R,'T w �k �'Y• �' w. � '�' �4 `: .(�' M� > ' n *j� p � ,r �4� x �� ,' r. � ��. . �r. ,s,�, '" � � . j ,'� si 1"!"s ,.,�,. . .` � �1� !4 � . �� .< . � � "1 A� . , y '4 �!i ,�� \ r -w,1."�;R.�F.d+ `ay .,,w� , a^�' ¢�a�+" • '��r ' �N' t �,,, �� 1' �^ r� ier� � � �-+ � �y " ..g �� y �� .r� ,„a,.�; X .. i.��+1� 'f�� ,,� �'r �F�+�.,,.. .�}��..'Q.. ��..` t {J�,.`�+'�/��r. ..y�.` . :, . "y � . C4a. t. � ::, rw ' '�16�� `k C'�`s .�, w, �� ! �,�t rri�:!'MI✓/" ��_�y�,� + . • , � _� � �r � '; ��..� Sd � , _ �� j ...� . '"!R' � .... �� . �, �r:_�. „ y � , .. ��'N' a .... *'� � . ' y .r, � f� ., u��j �d� ,,�1' y , .„r��,,'{4r��rl,4lr' `+�' �S�" � , �. w+ ` r, � ,� ,�E,..$ � ,�R* ._... •. , : ;v..J , � s; h 1 + ��R *. '.�. �� .... � ' r . ,�q�� . ''k�,',�� . e '�r�� ♦ ; � ��:� �� '�ftti��'_� , �� ,r . 4 . � , � . e�<. y.�, TM )�`� r <_. :_ , . +W . 1}x !� �"^' �J. • � L "4 �:'��'.� , 1 T�`� " ��/ P{ '� '��X« � •� ��M- . �w ' � � . � , � „ tl' � a�y��l�� ,�y i� �e ��FSR + �� y �,j��~ n F ', �� .��. ��.W�'��' W�*� �t ';F� �4� a� �+� r=�"", `�� ":� �� , .�� •� ; � � �� ,�..r '' � �,. �F . , � � � # �� .� �., 4 �. �. _ �,�'' . . :�� . ° ; ° ` '• ' e� �'�' �: �r .�t +�- '�'�'` � �, ''„„pr.'' - Y M" 1 ^ ,' I .ei,�� ^ R '� .,,. �� ' , e � .,:rw�� ,.. ` �,.�' � rd.. �� ° ....�.�� : ,� �C.'r FI � . f _ ^-� � , �` ,� 1 :��,,A;`�w ` �� M ;.h. ��. �'�+.�- ..., 4. w, ' � �.o��.�..♦ �� -� � ��w� . L �.,��C�Z� �` i ; �� "'`'�„�� .�._ ., -�-�.�� , 4 � �� d�� , �x�y,��Je ,�' � �� ; ��!� , � • �'-+r�,� � � �+c.� •.. � . a � . . . ,,,,yy a� --.._ ,�.�I" "-. � , ' ,�7 . . - `. - . R �._, . �.,. *x. �� r.. 1 , I � ,.��`'`.ti. •,,�_ 'r . , �� .ii'�A^ ;t� .. .. ��'zr�/ :r il. �� ' . � �, ., _ _ �t � � . � �;, � •.�',� � 4r '� '�' ;yl�:,� �,� .,•• .z :.� ,�� ~ �� ,r �,.� �; ��`r� °.��,�� v ��r . ��i"'_ �� ' .. .�. • � e.: ��w.� ��,++..`.. °`� .k�` r' � ��t��a � ..,� � � �� aI 'WFx��: �,��,A� � � •-• ,��.�] - ,r Y , � � .. . . ,,. . ..� � �.. f �,r .,, � . .,�.,.., � `• ,� { s o :.. �M A, � A'.. 1 .�._....a... ��' ; � "" �.,r• � 1 �'�" 1 � �� o"�R � + �� wy� .d ,. . _. f .. . � �, a.,�.. ' �• _ y/ � . y� � ,.�,+.--,� I7 I , r -P ��„ rX}�1�y� .7 �l�a� .��1jr �/ �, �' 4 .. ,"'� � � �� ,. � `\\ �� 1 7�M�;�., hM:i � ��(, w ��" ^.,� r�'v.� "�^ ,t ` �,�f•,�J ��r�I]2qD��4� . � .� ''A ,V � a � r �": .�t /� �� r�, .� `'• �1,�� y��:'r�'��1.��`�e �� y�'.! � �.„., �� `�i�` °� �a � �sc' y�p �r U '�i'` `� �• � '�` �" i . .. , � �� , � � ` � 4' r�Q+�� :aoor�_ ��.� r 1 e x��+ � -�!'t� ��g�.' � . ' � '� �� f�+ � �/ .� . 4•� .. . rr. , � H.A "'� � � .,�I l, 3,r 1 r t ... ,.. �w � � ,��rY '�`'�.. y�; +��•r �F yb�l��. �4 l,i�.: .:.�`�� r�W .t "� . . ,��F �"��f� .r}'s�� 51 � _;- � ��r �� n�..,, � .. - � �� "�� a•, _,�" y � •., i � �� . �. . �,�ror .`�,.,:_y�R�� f� . .vf-t�r,,� � �1�.�' �*-�'�i('`a r� � �,�� +rr+r;,�„, ` � , . . • .. � ',� , : . • �,, ?,' . * . �� l'4i'� � ` ,. . �� y ��. A, Y ~� �, � 1 �� H r ,gt , � .t � r�� ,�' 'ri ��r1R't m •t �x �� < ~"'��wa�F�.�.-� �V '•'- � ♦ i ? � • " , ` �" E ' r.. , L �� :: . � r � ,'�4w ' � � ' �, ' ✓ , . ��' �c 4 � : ��'' '�`�'_1��o►"` �` b'� � .� `.. ., �. � �� :%I � . A' '.t. , � y � ' r ; , � w �li '� � R`,`r-�r �..i �. ��..,.�I �a�, y t�� }�� y' p � ,� ,; _ �"`'R � � ��N �,. ..� I,""M.� �i� ~ � �� :� ttF�,'i�'' �� .. .!. �� r. ��v x&`�,� �� i' , � � � ( • � ,• ,.-• �}. �y r' � + ..�. e�. tir. L� t �:v E�, • � � ��. r f`'�"V:? �7�!'!�iA�1. —_ se'e.T� � ��`t��"��r .. -- �r.'_s.;w t rry,' � _� ,. L . � . r ot+'� y�,:. - � �.�.�r��r� '��.r• t w� � '�� - ! `•!''r�� #�� {� il ��t�n �.s'.! ,�`"F , �,I 1 ' .{'�+`F! � y �` � ", '��i. �"v��°�- ,-• �, � �'/ F.}.t �, � .� �� r' �� . '�� -� �'�-�r'�' �r� " �'�� "��_ } _ . �.� r � �" �^�`,r„4++, `� f.,. p`+g y.f�yY��'"'.� C 1"`"+� � ��''� kv= a ' r � �F• � � �Y� ,�k'�'d•yC" Fb'+ . � • ,,,ppp,,,... �'" t�, y�'`� � , `�'�,: sa: �y �i� ,�,c � " �' � - ♦ ,,. �,"'� � � . a i 7 . a�- �— Qw4".�... , r. q � xn �� , aG`�\�a�.~��`.w�`�� 4�'� ��t.`� � ',.�r.�, �+'�� ,.,� ' i.�. ..._ �'y..,+? � ��-1� �+� ��'��>,+`��('i� E � � �n�_, • �:` ��# �, d/�.¢� .,4r�pF w }r"� ' � !<,. . .� ` i'�'` , `� � f ., , �� ,�.:�,.� L • , r. ; .ar �i�'�, d 6 i I � � . � � .� .�,� '� a .d6.:�".,�� '. � ��'��1�_C.i�:i•✓'�, � .Jr �.:�i�.��, ��-, I �_' .� �,j;� ��.. �,Y�.�`.�»., ; •� ��,1� _.��r•_ .� . i�.; �'�'Ir_ °ry+r��'T , . , �.. t r . � � '�. �* M1�� .a •�, �(��,u��;��rx"`��r�i�(F:�"t ljl � `.�r .r . �� y w; ., i � !�y ,;�., a , � . , y,� �yy�� y ' � �tr �+d��"��° <°��,i� . '" .�,.o .. itir t'. ' _,. � f*�y�' �Yir�r.�.�`� �� 'a �. .rt,� �'YrII�� '#`j1,'�' t"�'e:�r�� .,�'r��.�M+�T.,wyq�M l' (r(��,.(Y�'.i,� b �I(�'��;.y, �, .�� ""�'+wwrM .,', •* .��,,, 3�'.�,'�"»`��',.�; b'�;s,;� � T.�� i!'�"r` �'��,�^,.�,r.',�"��,��;.�''�.�' `.`��'„ '�` ,�R�!>�„�� , ..��IM!k�� .�av� .��,��j.��4,,w�..�� 4�., � � � ,��M _O�J`��„��r�y. �i„'_/ �1-...a�..��. � , r" !y"w��,,,�J�7��y�,��.� �_ � ,a°C'� ��,�. .,��'' �r.y�� p �i��t��iW'� � rf"� ,'�""r." ��i� ' :�.+'_ , ��/�� R,.�F.w�. � y 4�k„'"T./,j'�°�d:" ��^�.�„ w,i ` .•/;� .�:...' , '�5B��4 e..�f,.'.Cg y�. � �y(,� }^ "� � ,'4� '�ar� .J.. Ynl.��I�r � �t{i,n� ��-!% {,:�� "",�:�1.� 4��*i��r d''�� '•f��,•��"T/. �.� n� ��.�M'�/S ;�,,,:.��..i' '�.." � a�*`r".+T_ ,,,j,{: _JR'� `' ,X!v.l�°". ; � , , �� t „_'` ��1� n .:�s.. .�1 � �� /t',., •� '.,�r'•� ��sT.�.._ 4�►. �� .'� •tf'« �".`�r, n�:,�rd�i.'� r'�4'y `WO'.}f �.��. r's� � , . .: °' Mx _ . - r . , n ., , ,,. , , , �`" _ _ ,n,n r. 4, ' �. .: � r a . �. v Tlw Mifwii�ali�n includnd un Ihls�iiap has Ucun wnp�ud bY Kirp nN W m a varwty u cuwcuc Ynd ia�ubpd b che�qa wth�xd nolY.e.Nin�Cn��nty nwkne m p , 1 t�� 1..,i..l�i�";�r 1 .I .� �y.' L I 1 x:.�Yn�ll wss.or rl�hls�o Ihc �.� .1' iil.r�i��{�i TI�'e�1��u r u N s�v� numMA Iw ua n a surr�y qodud.Kinp Cowiry WY noi 6�YWI�for�ny p�nrN,�p.nnl,indlne6 irKid�nld,a mrwquenl�al tlrmaqee ncJutluig.��i roi I mi�ed�o-losi reven�ns or I�ai profps r�s��u�y I��iw��-�. _,�a�ol ihe idoiinai un cunia�nud on O:s inap.Any�,I��i ii��„y��i�n.,i�i� u, .iy�, pwhlbiled oiwpl by wmMn permy9bn o1 King Cwxiry. YW �King County Wle:UB/2UtU Souice:Kirp Caunly dNP-Pmperly InlmneUon(hllp:/lwww.melrokc.qov/GI&IIMP) �rGc�reE y FLOOD MAP n��,' ��:i��I i� ��/ %�� i � ar i-., m Leptnd /// //, `\ '�irJt � `S' MqMfOMY�ha�w '��i �' l\� �" � �" � ��' , ,/j j'//�%a;'��-?l� �`, ,-/ 'x' w�wYl.�h. �� / ` , / i`• ��/4`Y ��/,��^ ~1 ,' I ��` �•� \/ /�/ .,...� / � i�t {INM� , �i, �J CVQai R�vvr '�'�P':�` �-'�ff/ / t�,� � �/�"' e"�4..^ �� ''�,. �/� /��.�`��/%/j��,�•y i`'+�.a �"te,� . y� �\�/� /•/��/L_c_.�/1% �/ T 7.#°� ►WcNs Y � +��5_.� �^'^' j / . ]•.. f . ___. - � �•.• j � � � laY�s and Wp 11Wm i � 4�� \ SY7N11{ � r � �� ROa/W�r y, 's'o'rwo � t�., ae ta ,� :.w � 1N rw�M n y �� ..,. ... ;�. � } -.._ M�r.Ct v,l`fy�. 1 � 4R � '� . � ,�M�.: � � ��N `�4 ._",,,,.�, , ��l � .� .,- - . M '* � �,�`�.e..'. e+M�„� � �� ,��,_.... � � r� '+� . T�, �,; 'R i s''` * 'i;,,"_" Y _ .,4� � K t1�1M q ��r �., .., .�— �� }.�. ,� ' �. ; _�_. . >�� '; . ! aisn�ti ��?' .. c , > ...�.;� �--�.____ �... .._._. ..... ' ...... .. ......... � . ,, .�..m,_...•....�.. �..x � �.N�'f� � �M►Mr� ___. i�� :GI ao a�c...�r • l50\ on w.mw�r ww.mn ��.ry wwn�rr r �rpw ��pyq m�1�WrY w�dW la w r��m1 P��o Cn/W �ol M 4i�y IiMr•�Pw.�L YorY��m�MiYl i�pr N[�4q.OM n011MM01o.1oY Aw7w /W F��M�V�sn Ilr M� I��MYti MY�rP�mnY�W m Ili�in�bM W�W Mi1�W�/MMMkn On ti nr�i Obi�A��ap N'w�n iw�Wn d RmYC.w�11' ar:wa�a sna:wyaw+wiwv-trwn�wrMrM.�+.�.�ar�vi KII��Ot�11ty � 1 G (,c.(Z � 5 DRAINAGE COMPLAINT MAP _ .�_ ,_„ ,.,�a .. . � ,___ ,- . ._ _� �.�� pr�re i.a.. ', �. :,� �'�1 Cawr Mu�drY . � ,... . , . � ' �' � �. � � x YMrYbhW �'""a. � �1� �.,� � ,.�, : `lw � ._ v +' ��..Led+t.Rrvsr �1'r' SY�Y �"``�""'°��x,: �_, -�.,,,�.,� � �w.,. _�,� .� �T -,...; . .. t - � �,; �r. - __ .. _„ . �; x ��,. � �.a. •� � r ; = e��' ��aM , ` `g.#'� �.� � -�_ � �atu Nd trp Mwa .e.;,, .., '��` " .• ' n/ lrwr � (aipy� i �r •., � R��CM�MY�Y k e ... #�irnsr i ::t i,,Nr,;Nu. �E v y �s,� ^`�FY�4 If'��+ m � � � _ ,,. � �t�M/t � ... k'arH+t x �p;. `"'.�z � `�"`"� �? �'. � � �� 1► ""�' � '�` � �� /� ■ 1 .a�. �� , , �.� .�.�� .. . � `��r/�� - ��R . . � �ciy'°�"'ep�°"•r � 0 �50� �arl� awe�eb�r��vw/w dqy«wY M �1'M� Y�K + v tl �MMMAyFMrMriY/41oMwwr�aMMV��M�rvrr�O� .r�rrr.:w.rr.rvw.r �Mr M w � I �a+8r0•r�p b•�rn na�M�M If�1�V� Kirg County o.�,wm,o �.:wpond,�W..•..w�,�...o.,,u..�.�, Fi G�� E 6 LANDSLIDE HAZARD AREA ! -,,.. . ,. � , ��r.--- . �;,`k•`='r.'_�`-.� �f/.�', !!� >� � f%';�:,r' L'y°"° I -tq+r,t �,�.%/��,.i' �� WWdi11Mr //' /r dHaW� `�,�,� '``�.�.��`��r ;;/'.%��, � �,.,we„�, V�;� � �'�� x IloiwhM hW �-�..__, � / ��ln � .. ...�, �� iw�s _,:. Jt/rei,' ,,�� N� _. -., : +� wrs ... �� '.. � . r ,., �.o. �' • �!��.ip � 3 'x. I�k �� f Y ' � �"'� lat��and 1MN MYM ; � � ,` y� � .� �/f � �i'i � r � EwMlt . � . / %''�`j.�' � a '.!�'/,;!!'�,�."r'`�//%j�,%'%"�,i��?,,� �° .. . • Y � LIOL..a�w. � � ,/��/ ` ' i j�.i'�� ;j'�/�'�1'!!��'�� { )! 5Mp1 La�H�� ,:i d� �:.,J//'f��'�� . A�wa �f / .. ��arq,�� twrrwra ',\�vy �� "�/ � /j/ i`j � !� v � �'�js;,�lr,�% /r/f,•' ..� �� .rrrw.ua..y. ,, ,J�� ✓��,/�/!�,r/�J',Jl/i�r.: � .. r • �,r'� a r,', : , � �� r, 1�. , �� ,� �", < � �� ///r".'''/ i � s . �� `r ��/r/',/f'/lJ.�f//i��'�'� /��' F�i✓'"��fY/�f r/r,/ �. .� i�� . . � \./'y//f''�<.'�',;i�/%"//,,� �^1`1!,/!'�� `,tl,Fi/�/.i%�js �1�/�is: , s'�/r;%�/`i i;� a� �'�+1�`l:��fj,��'��rff�r/Irj'l/�%!!`�"' �/,�.r��i! �f/i r"J�� fi;i�/r/!/`.,�r"�J��/� 'i��'rr,rn ��. �"af •t�r �/ � �i!/ /f f��// � / � l�,l � "`r,�...�,c",r ,,/r/�l�l,/�r' ✓��,t•.F ,�s. ,r�/,/"�/,/ / ��. f f ,�/ � l/�i� .ri ;•//i/"�if� '`r �'�/ I � �`�''•r��L:i'rff"/�%� �f� ,i/j/�,,i�,�'�, f,%"j„��.r/'�//'Ji ¢ �«m � `�-�• � �i/�' i /'�r ///,///f'�'��"� �t / � ' � '�.^��Y..�/ , � / %�i/•/!� �, � �i` / �: � Y, �-!�.'/ .. �r i��./,!i�r� ;rr f.. �/p / �, /�! �� ✓i:' � � �,�, f� /�',� /�%,�r�,'/i !/;•��,;,�;�%r � f/,ft „ / rOj'�.r s /'� � / fi�+��l,,r,r f,r�/'. i i� � .�'1'`�f,�% ,%, /�,//�,. � '��i/!%" / /'/i f .r/,,�` / Y !r !jf'R/�/�,,,,r./l�i,�''�/�/f f�/��r,//�'�' /�Er f.f/f�r j�f/! /F' / / t \ P ��,/� ✓�, ��f i ii�/1/!�1r` fr�/ f/`}`if �r'/,/'//�/f��. s�t'r»ar � Y � ��,r �+ �t�//,// ,,/�.//,/'/�� ./. /� ///.�,/� ,,+' f J'� / .- .+Er ��%"�/��/%/'��%��//: !�'��I �'/,/�/',i � f�� /f �� f %�,r!///'�;�t i �� f , �,�i''�/� �; / J� •"��.��/ �%,;/�^�'/I/�' "�/ff,i�,/��%��//l�.��f,�/J/j f/. ./`i'f�,; ��/r"`'+� ``�','�� /�� !�� if/ ��j r �;"f��f%,.J��!!'! !.. � .'° // f`�%' ��f�'f�%`f /%f.1 .i%�i'�,/.,�,!�./ j�,� , f ;" x�„� ;f'`,�i/�;��'` �f/�'rrr'.f��i iJ `��i/'��r �'/'` .,!*.r.�{/.//J ,�r'�f�rlfj,,j � �j�f lJ'�„%�� .✓�,r��.�r!r'�i^�/�'�,A�`�''%/' -..��! .� �/f/ r�..,/,�,� ��;/ „, r`4, f%'i/j/ �r J��/�/�/r"•�"%�. ��1 ., .s�r1/r%' rr i!/�%,'r,';:~.� :c�siw..�c..M. m .:/f'/J,.'!, is�,✓i:/;4 � �5011 Nr�4�r r.r�rlt P��i��4 Mr� w1Rw�ria. m�� nn�a.v �.�w r r . n h�r �In mcuw r�nl wo/Y0iY0 rwp A.��wn tw�+ww M wir Cwrp ~ ��9'T��0�.i��u�o0rrr a miw�+r Or�+O��eu�ir W�n.wr m��w a bK 0��+�Mam sr w.a arw�alir aanrw m N�wR NM ww a N�w w Inbi.Mon w w�niw r � King County ar uveoa sw...�c.�co..+r wv.s.�....w.�m�o•n..�.�vwannu►t FlCr�+2, � -7 Soil AAap--lOrg CourNy Aros.Waahington � � r i R � - `_5a560 %;-C::� �.i,s720 `.c,:a�.J .�r:;n:io aT2B'C '�^ 4T264' , � � w ; , :� � � i � . ' � ,��,� � � �� • � � Y♦ � � s �. +� • o K f � sa „ �� -t. � 11_�� . � , i � ' ti •�♦ �� s� �,� ; •�r*l� ,�� ♦ � .� ` � �� •s�� .�� 3 �• � � � � � �` ' � - g $ • f`' � .�G � � � � ,t � r _ _ :�� -� .. �t� /�"� �r. �`�` • � $ �r► � ��'j'��, R.� ,� ,� $ � �1 � r rt'�� , ' T— .- . ` � a , �'+ ' i� �!'�„� � � • ��r� �� -� � "' � � � 8 I ` � ► • � � ��'�• �� r � r 8 �1. ��'"��. . �- . � ., .�.. � � � < ,,. • r-- - �� ~ '�' � - }� ' � ,!'�'�� • , _jr f �� .� L , � a a j \ � � � ♦ • � � � r �• i"r �, -'- : g � �f.. + �,r r , �3 � � �� _ { � � � ,,.,� _ , . �, ---� �'' .. $ ' ' ..�: � • -�� • � �' ,�. Pry •e � � ,a 4� O N • • �' 'F yt � �`" _ ` . � � `' .. ,/�' .A�L�a�rr�N�r�� • , :�-; �r i+s ►� .. �r • � s S =:� � ��,r,^ p" `. � • - � � • � �,..: . � �; � ��*�'� �.` '��. . �r 2r ar � �r r�'4r sa+.wo :,G:ao , . :.;:r,ac + AAap StWa 13.3J0 f pnrpd on A aa�{dS a 717 Y�set � i i � A o � � ,� ,� � o ,� � ,� � � Contarvatlon Servios Natanal Cooperobw��Sal Survey P�ape 7 a 3 $OY(�A�-�KillO CdINy AIl�.W�WMf1010fl I� MAP LEGEND MAP INFORMATION �w.M rw.w.�y►al � y.r sa�r sva Mav so.ie:t:a,�o r Mrw.a on�aw�a.6•■�t�►a,..t. 0 nn.a rw�1 c��9 � w.�spa� 7h.sor urwys rrt aompbe yar�►a ww.n�.pp.d d t�a,000. iN� Soil WP lM�a a 011w Pbw nly on IM bar�'ab on�ad�rtrp sfwt lor amrMe m�p iNaw LM R��a ��. �w'�f~�~ '^.. OWY SouC�d M�p: Ntlutl R�wuro�s C.oro�wlion S�vio� v �t . . Short SwP akp� W�b 801 Suv�y URL: IM�Jh�r�oiMrv�y.�s.u�d�.pov � b„o,�,p� CoadkrM&ysMm: UTM Zar 10N NADf3 ... OM�« Thit�rod�x!k�rM�d trom Ilw USDJMRCS arYMd d�L as d 3� �� rartletl Fw�w� Ilr wsion di(s)Y�Isd bNow. • Cb�d O�O�N�on � C�If�s X �«"M� Sai Suwy MY. ` Icirp Cour�ly M+.1�p�n w.w F..a... S�rv�r H..nN.: v.�sion 6.Se{+22.2ooY a �""�y� � �0'� Dy�(a)MrNI YNp�s wM�photopraph�d: 7R4R008 � 0 lmM1 _ -, SYwM�nd Crnls Th�01�Oplwb o►o1F1K b�t�m�p o�MIf1k!►M1t i0Y Wys wM� . /� LM Ro�r Tn�pArYaw ��P��P��aY dMfeis kom fN b�dcpr�Durd J al► WsA a w�np �++� R�Is �Y�on MMse m�ps.As a IrM�.t011N Ilwwf ihwrp �l or mp i.�w bo�.�aui�.m.r ae w1auM. !! 1AYr a our�y ^� MNMW1t NOlMr�ys � � �� .. us Rowa n • hrw�i�l VYYMr � " Yyor Ratl� u � v Rodc Outarop ^� �0d� � t �� ti� .. 6rdf�� s SwMdy 6od�d 6pa1 0 SinklaM � �� `�� ! SOoi Mw O sa�y 8ra � w.tw��.s.w�.s vwc sor s�sy �tran000 CMMewM�a iMviC� Nwornl CoopMatiw Soi Surv�Y Pap�2 d 3 �" � G . � �c�� t. ) ��«.�,►�...� �Aap Un�t Legend w..c�►w...wr.w�.i.�� w�+�e s�.� w�u�w.�. �..�.�a r.�.w.��a � wmwor.na wiw.o+..r.n.e..r s.o ��.nc w ►�«�sw wa� s,.� ae.o� gr A,y.�a�.s.�r ioa�n o.+ arx U► llir►ap IYd 13.2 21.5% Tohb fer An�d M1Mwt ii.� iN.�'!i � NtlYnl AM�YreM Y1N�b SW S�rwy 11/3JZOOY 6aw��evM{��l�nk� N�oiMl CoopKaW»Sei Suwy P�3 of� I � - Figure 8 Offsite Analysis Limits i �,"�Y �`�"'sc�"�ani i�� 4r� �rrpy�ry,d�� .�y,�e �, ��'ae -:tr� 4� t�i,,� � \ LeQend ,.��.� ' 'I � � Y� 9��t F `1� � r i�+�%"�r 1►t M=L. �y�''i!'F<�i'•n�-� t„ S..�f. sC,6�� ••9�: „�o � . .�• —� CouMyYaubary e1;„t, +� y�,,, +w J!y�It i'F f}� r .+t q �� _ ,...._ ��* �k',.'�,�, w- F',�� j�t ��it'��', �� "` y ,�c y'�t�,fj'i ��"� o,.�).��dq'Ll�',,s�T` : � :.�:�r � x MowiYlnwaka r "+�,�tN' „ "`�yt�� '+' �1'� > 4 �''y:'��„�It r;�M,� 'y`�,n ,� e , . . . '�i��1�i CeMours(10MII�M► �{ > u �' � ��ji,+d �y 1�`t � ��,� � �� E�y��1; �,+retls-►l� ` MJR� FOphway� a+ ��, 4 y rT r.��^c,�^,, j �;,,��t�r',,� Av� � �+'!�� ('"�'�� :� �.�� '� , ��S�"'' •' Incorporabd M� � �y�.�. �', r . i �,�, +-�.�� ...,,;"'"�'!� '� � ��"'�.�� x'�il�!� s '�c'.. ,%A�•• �aMM on��nr�r „ne ` � tl�.s'dtr��"� h�� "f ,��,4�MG "��, '��f a• ''�r'+' � ,. , r '� , � - �,ut � w � Jr ��t _� ,f Slneh o�' �� • t L P� � *� �:S�' � � � �"� •T.. �',�+�..�'p J P� ..,a��,�� '�`+��iK.'� Mqh+tW �i:: „�, � �r � � , .r`.� •.,,•-, �.. ��E�.- � . , ,r �,q♦�,,�'�^��7! fP�"� tl �n.ub � "'� � r„-, , ,... . .,• ^�'!�`� �+AM� . .`i � i� � .��'*"'M`�r s /`r� � �� 'r ! �,,y,atd� t'$�, ..T.,wt�""1� J M .\: M� �..� � ��.�,�. � 7 laal .�;;� a��r�0'A,�}�*'y yt��'.1ir3{ !�l�"+� , . �. e'.`�\u�.�4 �� '�.3 p .� .�.,. � Lak�s�nd lary�Riwn � pN � . ,: ��Y��I� ;4�/'Y.r�� "��y ` i..�� nf � � "j ! ` .� '.rf" �'`�d , cl' ��LA , ��,'I�, �-A+ � ��. (�AV'�.��' . � .��`� . SYr�lllf -_.__ *� �i� t �t� , r ��'�'"�-: �' - ��t ►.R.k r a ♦ � r �i 4 '�,� `w x� r�.. "i..� y ,� ,.�, � '�[ �� \ +, �:� �f ;��'� ��'�� •.� �, � Pulcs , �` '�� t.'L � i �, y! �w��.• �..�.�,:. ,�' 3� „ao�rr,r��. �,' �!�':l� ',�� ^'' '�,_.,t,,� �r'! t'� ��f'� 2007CdOrbrlal/1w0o�Nln) F..''' . _�..L,,t�`A�..�.: � 19�, �t. � �� ,: ��r... 'V F �p :eo7cao.M��rnoou.(171n) � �o. i "4 �°3��,��4l��,� � .__ �'•,,.... , o Y ' '�r, �' J ��\�'+. , ._ �r q �.. �"�r- ,v Y 1� � c�+' '{�� ►�.''.,,' �a.aaww� - ,, .. i ,�` ••`1'` ;,�T I\� '�` ��.. V ` A., ' � �, y.,. 12'' ..�' � ,'' ' �• `�. ^ � ��g�, aJ � /�/� 1 �� t ��a 10ip6'$ °�„� tR: �� Y`�scr �ie '�..�'tiry�� *:. � t �,� �.�i �� Qttr�7t �Y14�4,f.J , � l_�J- �`�{�} `"1 . r . u�{-. i� . ,�= i r J �,�� . ws, r. �►•�. ...,� ��' _i'�� A'"��!+�``'�.� . :-� � . �1� ;� "` � ,*:�' L fi-s � � � y� h_r �, .�.` - �. �` '. ^� YAl • . . L//�I!�Y..4� �� . • ��tJC ,;�MM1I (y+(qr / ��,A `� 4. (Y � � � %. .,1. � k'.'r y� . �OuCiR►�-�� / I� _ �� i� Q L (,, 1 1 \� tib� .� r� �. �d a �I� 1►` � , �� . �3 \ ':;;:°k,� � y0 y r��1T0��k f� !��l�11��h �, `'.�~� :�!`� � +n�,� :�fi.n,+� t. � �� 7ii; "�"`^""�,r,,, , � �, �- '} . w�s`��?�� ' "�'.*.,c�.. a., K A �� -� ,,� �9,� :�,�,. � �"�: �- ,,� ; .. .. ��'�� __ �;�,y,� C�r� d.� .3 , ,�r .:, z � � �� ,-,, ,r. , ! I r. f ' � °� � t- , " �.�{,��P i"'' s.'py, '��',�C (�<� �� : i.... .,. I, ,ac��a'1�� 'Y_,,, ��I ,�� .y. '��___ � + A^�. � ' �I�`a' '��,P�IF "�+ � �::, �•i � �'i ento�ri - �` , r ��l`.1'�j �:,4�;�;r � , �� 1 . ° � � r.�.Y�'��r�F��.i ��('j>�`:^. �.`, �e.j��,'o�( ^��!""` . ' r �._�l � K , •.. . � � �t�4� o e . {� W � � . ,'.�6��T f �� !, � , `•,� ��"M �CL��t ,��► �'• �'�"r� �'I �'�iay� v��` a� .r^ .�— � �-.,�� " �I,r' � ,. � � ,% ��" �.�'��[��C��.�\ p�*+0 �'�pM �- + 4�� ;tr r y'c �y,�'� �� . yi� Er. yy �n` [ L,.(,,1 ��/�<� '��d � �� r. �.� .�r ��t !� � 'r 'r�, -� �q, � . ��'1frKJLz�k�ai1�6��fF.l'i1`��y,�` l4 �r.y��✓, �;�.�� /' �� t:��`!'�F1:...""��' dP.•i�' � � �• � 9�/""�� {, ..t��,61t. ,,��1F��I ��4 ��i '�'�`��,� �j(>��+�Y{(�,,�� ,�!r,�` ..#' ..� � � Vt�� '"; �r� "`� �. ��l7i'" .� }7 � '�°' �'� y "�i "'j '''''�"' �� raR ;�w � �. ♦'*�wyx �fj � yr� ' �.► X* `; ' �f� "I �, ; � }� �`�` , �4 ��' r�.M." � � ;I-'�'t r,�f��i��a��'��1 .yC �'� � .,.�a Mf ��''4�,.�"i.� ,Sir��h r .,�-. ��,�,�. y�, cieuwK„�c��mr .f'�L.l,'id r. <x i� 5i�atritt 6�� v f -r. " �:�.a:`•�q',� T`.�, y ^�ii G 977Xfi'V! ��' �p' M In �n M Ihk m�V Iw Gnn CpnD J �ly�N Oni�v WICM YW� ��1 N�:.. � - ' � . ., .. . . nNnWG b11M O�t1YY�y plOOult K COYMy�M�1101 DO EN 101 MI NRI.ipOdYl.MWk�CI.klfk!WI n u� �� I N�� { " i. �y oSn u��V�W.an li,a e.y i.>m��lnlon�a6 1 �0I� 4 b UN � 411011. INNNIMM k n01 p��•A�pY w�„��o��. Y W� . �V��t�ri du r;r�r�xwhw�iy,l 1 r �nJ i., x ere�iin.�. 4�5i Vr�lle ios�lU�p li�rni Ue uaa w i�a�ae ol Ihe nlu�nuWm m�Wiyp pii��,�p Any ub d�nie rtrp a Inbrmomn on Nb mp e o.r innoio sowo.:uwa�r��w.Mi�a�uwn(naainMw m.w�w.w��sn�uvl �KIM�COUflt�/ Figure 9 Offsite Analysis Details . , � . ,'b' �!Y. ° "„ � m� , ^�� +�/,la,�' y',r v"'�� ye . S , �0 '.. " . ��_ ,�r rg ` 1 ..,,,�. — CWMyBoundary � � Le f1d „� ;.-'' S9 : � , � > 'M,� �, , � '` �� ` ��;; '�� '�' �.. X roww�w.r� °. " r��H,., � x, , .� • i. . �� co�.t�wnup�4 " �: � .,�„ `_ ---- �-�� „ ""ei�,. �j � - - , 1 Mh ��' �►� �t„ � w,. , -�. `"� '3� , . 1��}"�"" ��Irs' �' ^ . 1� � phw,y� CI �� - .i, 4 ��.. +�: f��.',y"��! � `,�..;,�� 33 � * w « �..'�M1 � � h N � aa.. , , � w ' �r$ , ,�,'�yr, //fY, .. ��. � Z`f �r.r �"��,�w�� :Z2r�*`� �,�,`�t� . �� Sw�borsa � `�� `''� �r�^»w�'` � �'+. 3�'�.f1 �" ' �,. 4iH 32, �s a �,;-.-` Y� l;'�'� , R';�,� F„ N �'f Na..,. ,. I �,, `._�n•� ,�'�C � �- -d� � 1 � :�, 5 5�; �� '� �`'s � M�•�•,,,�� ..r , / /�; , ^ � � Is � �� `y�� ,�, ,�' ' � • 1 t �+i�. � • C �.�"�+' 1 � +i!�`��fi;�'"�� . $'� � �..c �,o- ��. .� .6 laa� ,S� .�,n , -..� :G'�. R . a � _ `�p' r.\ :�r — ,sc` �r� �',�' y / 40 � �F6F' 1. � � � lak�s and lary�Itiv�n . ,_ ` u � '�„�� :w!�� j 1 �_��rw��T`.`+�i 7;��: . . � in1. ;'~�" •y1�y �1 �-. n/ 'wa�ns ; .� ,�.,.. ,,.. / r �� w • i • ` /�_ : . eK�� . �! ,�l J� ��•�t i ��?- � L P�roda _ . �y . � ti.� . T� • � I •y; ..,�, .,� / �' �N► .w �� Puk ' �� ' , .�r�� y+�..�w�y/� P � '. v �. •„ •h I / "�. '�' ' sc�s`i.�i�' •7 �" &��I,i�..'1`' 1��/ ,�.. ' � � . � I007 Color Mrid�hato�(iln) �� °� �t"��,.� s, >. {r-�� ',Renton /,.'! ' ,, +�� ,ii. �/ � �-'M1�. '�'�1 �� ' i,.'� yy i �r �++t`` ��`V J� �, �� t �, 2�07 Calor Mrid�holot(121n) r ( r 7 �•�.y� �. � / � t :4�� " y, ° `�' � " '�• t� ''+"� �I �!"��_ ° �o ' , i Slwd�d RNMI . �; � �n�, i �,� j. ' ' � ;. �* " ' ra:r� e E/tn..�f �/� �-,a+r� �+�r '::J _� t � � � M1 D C �� ,,;� �� ,� ��y : ;._� � � � € ! �P p. �4 4C y� �} �... � � � ' • liiew ",v. ._ . .� .. � � . .. � I � � ` •/" �.;-�'��4� ;�.-'y ' ->� :�' �, i . %� % �°r+ ¢' 'i /�/�r Pl�dfo L.�ca-+�� _�»�c �i � � , -�= �.�� + ' � ' ��:ti�`,�,��,^�=�'' ��► I � � ' � '• - C�} �.tv�c��k �.3� �x, � '� r-- : i' n �� i� � ti��;� �' � �` �;� .t�'i ; �� „ .� � �, ��,_, , � F��--/-�., ',��, 2,;. � • � � � � � • '° + � �, � .�,\ . :, � � T/T ` .. +�, .�, �r � '" �� `� + •�` .,. � �� -.�.. ' ` �, �' 1,��'�"� �s � � �'f :� �j . -�� .' « . . . , , . � ' M1r (SfY ` �J , , ' � • � i� t� � � r' i d . *' , . � ;�►: �''� �.,, ~'� ,,�,�'��; j� J`� �`` �;j�� t, . .v', , �: �, � �S .�� .� ��q� ♦" '�f ( �_.. , .`` f��f. � :y�. ,q� .;`Z.�"�� .}�'r �. �' �� , i�!!y��-.q+J':4' ,�i,' .��' � Rir, _ �" @�`;v ��, �,:.♦'� •p�� y.��1°`"r* a� �„ �♦ �� t �Y''k;C g� ' /-� �y ..� 4 ./ •. t�. M � . 'I � ' •M �I ",��(� � 'b J� �Y.�f...�.�-{ * �� -:� �'f► '. .� �w 'c. t- '1��c y -} �Y � 1 r �" ��, ��`?•,�� ,' . �,* t J�l;. �'� pirw��;p.�* + ''��., e..: ''� �'1 c � .� ��f ir�- �,�j��.� � ! �,'�.ri �A � f� d�Y� ,�� _�o �.�: ° `� �, ��,x �r�- , �,: " } �.' »�.�a� �v..lw a �. �,,,r„r�' r� � �„ 4;r� . � r�`� � Y�i�� +,,• 443��,nr�w y� � �p ,�fY�+ '�F !d< ��. ....� :m '. _ .ij . ! .a ic��ao.K.oc��„`"�r •� .�., 1 .._--� .= �1 �v` .,.,, �.�' '_ � . ��..�t �,F#,� ,{( ..��*� �• � �,, on rrwon.sn..o � WK„ac<�:,��.iyn� ' ,,✓ c _ .. .. �qna �.��.� sr. � ., . inMnW01a ws a 1 wrve poOutY �n�.�arnN nl courcva 1 b tMnyY w1Mw I F: '. , �. . .� , : Y CO�MIIy MIM Iql UO 1�iLk I�r a��n�nl.ape�el 1rq rKA.MK1E�11y1,pl CAINp�IOM�YI Uemi�et ii��uJ��µ�Lul��I I�i ilxJ n in,i��.., L ni y��l,e ee.11 I��U�a11 I e u�� .Y . M ses.1 .0/ f b YM WCI� �MY011 IIpCVIMM Y MI p��'��w��,��C��. y .uin�I uw mlanHlien conIWNJ on tlW my.My aW d Mk IIMp a N1bIrtr40n m Ihia iMp h o«.:+nrm+o BaNp.KYqCquyY�P'P�W�MMIamrYw�l�Jnww.m�ttWc.O��IWMP1 �KingCou�y _ `��r';� � � �""'`-r.,�.� ,� � ..� . ,.: { . - �:� � .-x. '.:..��'4'� . "�,r , t-n:.__ `m-: . ' � ' �• . !� � ... J _. .. „ , . ' .- - . � �, . ..�.,,� - � w � . 4. � ro ... . .. �9`� .��,.. .M " �° ...� �"�.,� � ��„��__-- r;,_ � � �' . , ' DI.4CHARGE TO �w , _ . �; � � - ' �k �. , ; , ,. MADSEN C�iEEK � .u,� � �� '� �,,_ � �, ;, . �I �.','A`.v, =i; .�, , �� • � D1SCHqF�CiE� , �� r..` ._ ' "�,Vt 4� s'" � � .n _ ,�� '�, . , � AAqpSEN CREEK � �'n � `�'� . . � , �a;, ,,+� . .` +. � ., _ j; � � , r,. � �; .. '`l11 I k .7� "F.� �. `,r• x7r ..� R� � � �A 'n �r i� � � '�;�'. ° „�A¢� g . � ^�t+a � � '••w� K _ w1 � _ � , � ` 1 ,�:� u . ` � f _. ��^ l u~ , � � .. . _ �y _ .. T_ _� �. 'A.. a� 1 �� T �.." 'W �-�.. .. L __ �""{.. A 1 � _" ..r . � .�� .� .. . ! . �. ,.�,R .4� A"'"_•g � . _. i � ,; _ � .. � � 1�.e1J ' , ,"��', � - '� � o �." n..-�4"M�-'- ' . � �^ �� .' • �a 1' �. !1F rb � ;e' � t .t � • �' � � . '� ��"a. ,. � ��. '�`"..rk �"�n: -- '�� _ � x ' � . °` • r ��t �. i -' �� `� �� : ,,, . . �,,j . . - .. .�.-� .�*;� ,`,� `` . � '' /-. - � - r� ; '� . ..� , ,i 5�4 � � ��h.Y �'�Y.� � �' ,� " -•-� � 4 �� 3 ��w�lpn�v�.�yG1� _.' 14'. 1� ,.r .. �� r. <._ur ,.�p 'r � �/�• � .t/1'1CGn � � �1 �r � w FL,OW TOWARD ' i�r w - �Pl11uIP ST TION3� �. . '"�� . ..... . ,� �..�.�. � �� »� y� . - . �„�, . � , � „ MADSEN �. - 'y,. r , "' CFlEEK ? � ,r.,,�,�� ,a ., '�, `�-,�'��` �r/ �; OVERFLOW ,��.,�, � • I r . ^ � ` ; . ' s ��.h . `:. � � `� � , : — _ ' .. : � h . �, . � . ` � • . ,.�,,. �0� . :'.�,. I r �m. a�. , - � � .. (i S ^ � .�� '{ . .r. .� � . , ,..,, �.,i : � . - , , ,, � -- �, /,� _.. �, , . ,. , �-/" � p �., ^~ _' _k� .iw., , ,�... ., � ., . , '1 � �- c i�� Y� ��'.. . �, ` , . � a'�,',, SCOPE � I. I" ' , .. j ^ � r" �,`ti:� � � �t'j r•, � � A -— _ �� , `�.�� ,'_ _ �� ' ,� ( ��i�,�.,_ . �� ' I `r' ,.� ,�c„s^+�fp S�U I� 1 �, ��x, � "�' iy,�,�"� �,� 1� Ir'� .f � .�� ♦ �^ ��t, //r t�� , r v �ytif�,,,�,.,'�'"Wl.,y"�'. �-!.A r ��''� i t �' � t +� � I ��a•'b ��1�.'��.� • *�� w ��V � _ � '��I t t� �� ~y,y,� V✓ �� ' , , �� - , . . -.. . .. r�: ;� vE � -� r_ ,�S �, , , �(�'� .. - : ,�� , , � � :� ` _ .. ..� �;� .� -� 6 4. � a, '�"�`.: �� x � �`, �► s!'-�- ^`-•'� �_ n. ��r #.:• 1 � R�.� ,6.' ^ �� I . i . . I �-- —1^�. -�, . [ �' 1 ' `I `v,1`Jr ` �'._ I•I� *�A �`�� _ —' �_� ._�� . � � ` +�. "f� _ � +jf � t ,.. � i �'� ��1 '. \ �a� "eM _, , 0��a, , � }�'i, � —�.�. r � :.� ., � . . . • � � \ '�'�f, ) � '�� r' b il` tlY � ,��--• 1 . � . , �a ` a: . . . ,i� -� .. . r j� � � � . �� _� � ..�.� ts.,.�i. . r .�a.�.�W.�..t"� wY.� .;� • � , ...�;..._ �_ � ' :.Jt; _. 1 ;� CA WONDERLAND ESTATES IGURE: ;I G; ;i � ; ,�: � � �� 10 �� ' ' ' ' ' � ` '`� SITE HYDROLOGY PUMP STATION I �� Mq.,M 'p.` STORAGE POND I � __�- � .. � I ,.�.,...I I I I I I� �I I I � - - �' I I _ I I I-.- �. � _:.;.:� � : �-- , �� :� �� . � �,,.�,o..��, _ _ -----,h----- ; �`.. w mw i c raav wi�'�atYFl��.10 _ _ _ _ ' — —..--�� —.— �' � � /Lr � I . • . . . �, . . ' . � t 1 � . . _ .. � . '_ ' . ' " - ± I 1 � . .. ... r �.. . .G � 1 . . ��. �/' .._.. `�.. X S ' ' •l � . . L' '� ' . _ ... '. I` ... P� i ' ..: ` �� -^� r�� i ��.� Y P1 i�� -r,. �,• r �_� ��_�'" D � � y, �vi, �b..� f�. i � � . .. - I r � J��c't- �"f- i�� I !"� - z,.� �_.. � ��—, i. murs i � 1 � �� „ �"� �� .�� .S �1 `� ' i 1 �� . . � �>Hve. REPLACE EXISTING = �� i�i .,,^�6�„�'�,.�_�� ,,,...��. - � rl�:,�-� t y- • � i �1 .�, � . .l.y _ _W_ .�.-� '�- -.V/'-�-�y '.,� � ��_�.�.. SEEPAGE INTERCEPTOR \ i� i � T� �` � __` t _ l �- q"� � . ;i i�i � �-�� -•��•��-� "'��`��, �,-��'��t �`_��?��''. � � i � . . � . � � . ., � . . � � � � i• �� . � . � � . � il � , ; . o Ps p � a :. :. � ,. ; � , p . _ . � ' "' �„ �,v„c UPGRAdE EXIST G , , I ' , , , . . . ' • {� M„ "N"E01tl� l ' ---. P4 PUMPS ATION ,,. I � . . �-� r--- ��r ....._. � - . . NEW DUCK POND d., -:_ ri '� ' , t `j' � "- i i , I , � ; OVERFLOW WITH �:° i i � �� ...,_. DEBRIS BARRIER „ , � � r i � - ...,_ ., ' �t e � '� f� _ I._ . J ... . _ . �'1 U �],' � � NE,W CO/EYANC� ' � : :. ' � �. _ �i �� • � �'� J ` SYS � O ERFLQ il ,, , .. — .... � �rr T�+ : ri�"� �� E ,� , - � M TYR. � '„ _ .o_ . •' ; __,..,. ,. ; �.,�_ , � �,.+ � T� - ,_ � � , �� , . , � �.�� -��--� I ., � �� : , , � , , ,, , ; - _ r ;� �. ,. � ;� ; - � , , -_ _ ,� � w1 -� . , - ,;:. _� .-�� w - �' ---�''-� P3 � t' ! ; ;: : � � I , �.. .._. .� � �v�^'- .,. � `.'j,J - �.� ,.� .r7..___,/.�.-r� '} nviow� -r f�- ,. - D � ... ' } � m . _ .. o: I _._ _ .... � .. . � ... . .� . , _ o. , �� '' f � � m . v�"� . � ' �. . � � Z '� � ,. . � � ... � - �� . � . .. � i � � � r �T � � � ... ; '�( __. i.. . - . . . . . ? . . I I I �� ' ' _ �.-... 7 j . -- -- 3 �•.., , `-: a � L._.....i+ _,._ � ~3"-� . . ' ' ; f � . � '� .,. '�{ �, a ? �� ,. , . _ _ ; � � . ! �., . • . ._ � D � ��'",�,� ,_�ti � *�r"3.� �-�''��-�a �:�� :fi�, �'��' � _ . .. --.. . . ._, � � p � � _ i I `- � �+- �^� '�,. � I I � � .. . . UNPLATfED i � � � � � � � i.. . ' � � . � , K T.L.9718 ��,�.� p i y - i , i . UPGRADE EXISTING ?';�rH,k" o 9 . _,. , . . . . . . . O i '�':. - �+ ' D PUMP STATION I A . D . �g� . � I � . nwWJrovE ..... '. ___ � ��__ ��.'� � . .. . _�____�_____'_____`______�______�_ p� � ' :.... . . �1.________�_____ ' • �O . . 1 1 I ' _ . � _ ..--�--.._� . _ _. . . r �, r' r�usv�.cnu�r . �£:�� . �� .�.. . - ._ -�'-- ."__... , _ . " ' � �'��'6� ��SCa�E (IN FEET) ' �i.ioi nrrcn 0 40 80 160 WONDERLAND ESTATES FIGURE: HUITT'�LIARS PRELIMINARY DRAINAGE SYSTEM �� _, ___ '_...,_ "" --___ e� _ 3 '---, '- _ �u` - -` �, �__ �__ --- '-- _. `' ` �� '�_ � �_..._, �,�� _ � '� "` _ R.. �� -' a� �_f "_'._1 �� '_... � '_ i` _ i �� __ . .. . _� `�� .>k- � 1 v' . � ' ' -�` ,f' • . .._. _' ._1 W ':-��. --, ' __ -_, .,1 ' •Y,� . ,� ` � � r ~ _� -T Y ' , � 2 POND DRAIN!INFLOW ��--- ---- / , ' , q — ---____ PRESSURE DISCHARGE / ?g �; 3 " ~ Y � � '�' TO MADSEN CREEK AS IS �� PUMP as _ ` " . ; ,� ��T�GEpT��N WW /V�5 a� �� n ^ � � �� I i _ , p�0 ,�{" 3�5 w _ ��.`-.. � _ S � � %� 1 " ' 41z.ss. _� . � E R�NrON I�jAP- � ��— / �a� ;' �f'� r =N �E �q� �� a��3a } SPILLWAY € ` :` � , _ C�Y � I � ' � � - s 8�'y p= � � � � �.� MqpSF PRESSURE DISCHARGE R Ai i ' �"� 5'�� '"��.- " x N�-'REEK' `TO MADSEN CREEK AS IS � i.: � '� � � € �I D �•UPGRAlSE�w EXISTING �� , "' �-.. � �t i � i � '� �'�_.___. . _ � � PUMF1$TA710N ,u.� „�;� ,._ ,_ W � � � � "%. � : j' e ��F f ;� , _ .'. � � ' .__— 7 ., Q . p,;yR . '..., ,. �- r-k��- "� -u,_�' ��.rri:«�r�: � ��y �, � ��4na `� ��..,,i � - � � - $.y,. ^�ti� Q.� �\��_ � . , -. � t� � � a ;r� - " �'�i�iTii^��.� { t-:., � .. . � _ . �ya ` i O �l� cb OVERFLOW � dx; —N�W CONVEVANCE q�� — _� � SYSTEM (TYP.) '� PIPE .� �ft� � ` � !'%: . �� ... .. . �.`_-- Q � F . . ., ��. ��!'� c��i � ' ; , . � � ;. . 4 � � � a � � . � UPGRADE EXISTING � PUMP STATION SCALE (W FEET) 0 20 40 80 HUITT�LIARS WONDERLAND ESTATES FIGURE12 PRELIMINARY DRAINAGE SYSTEM DETAIL '� W _ W ' I�.(1-��1�.�LL=\�� HUITT-ZOLLARS,INC. • 814 E.Rke Street • Seatlle,WA 98122-3893 • 2(16.324.5500 phaie • 2(16.328.1880 faz • MiC-zoYas cam APPENDIX A: OFF-SITE ANALYSIS SUPPORTING DOCUMENTATION A.1 Off-site Analysis Drainage System Table A.2 Photographs J:`1�093201`•Wonderland Estates.06'.ApriITIR DRAFT 4/9/201� }, � ; 4 1 � .i ` :S S �`+ i , __ _ , .-. , . ., �. ___.._. .. _._.__ . . HUITT-ZOLLARS.INC. . 614 E Pike Street • Seattle'f!A 981223893 • 200 324.5500 phone . 206 328.1880 fax . huitt-zdlars com A.1 Off-site Analysis Drainage System Tables J:`1�093�0 l l�'ondtvland E,tates 06 ApriITIR DRAFT 4/9/201� OFF-SITE ANALYSIS DRAINAGE SYSTEM TABLE SURFACE WATER DESIGN MANUAL,CORE REQUIREMENT#2 g��o; L UW r/ �!�Cv �•t/�t/ S�bbasin Nime: �G �S� �/�G� Subbasia Number: Symbol Drsinayo D�ainayt 8bpo Distanco Exbdnq PobntW Obs�rvations of fiold Component Typ�� Component hom sib Problems Probl�ms insp�ctor, resoures Nama snd Size Descri tion discha nvi�w�r or resident sN map Typr sheat bw,swale, dnirmpe baafn,ve9eUtbn, % Y.ml=1.320 fl. consUidio�u,widar capacity,pondinp. tribulary aroa,likeGhood of probbm, � �f. �/� stnam,chamsl,pipe, cover,dePfh,typs of aensitiw owrtoppirp,lloodinp habMat or orpan4m overflow pathw�ys.Polential knpacta ' , pond;Size:diamekr, sna,volumt desUudion,seourirp,bank sloupNnp, aurisco sroa aedknentatlon,M�ion,ottier erosion i M 1 '' - `e '� ' Z 9. D �/�.�r:. �'/�..�.:, +� •.�..� �h : � ' 9 xG cwlvvr '/. /v ' rw.rti,i.fi... �M,�,i :K .� /h 3 'r�'a,�a ,,/ ,3�1e v�' t4�M�. �d F��..�.� •� � /,'��duk �'/�� N/ �.� /J �•Zv/ f[�w�IwTM'� ��J��l•^ .• 5 ,� �u.,��,«k o. 3°l, �S�' s�r.�.� ,r •� ., rh G ' , ""' '� '�,v 0.39'. I 75� " .. �, � est�►��+rd '� ��h d�� esfi'y»�c�'r i1 �'' r►� f��I i��n• , Z�N� . t n�n_iK�v OFF-STTE ANALYSIS DRAINAGE SYSTEM TABLE SURFACE WATER DESIGN MANUAL,CORE REQUIREMENT#2 L v l,�/t/ Basin: ��p� /Q.Ii�/ Subbasin Name: /j?� e�3G.� �it,�t+E Subbs�sin Number: Symbol Dninay� Drainayo 81op� Distanca Existin� Pobentlal Obs�rvstions of fl�ld Componant Typ�, Compon�nt from sitA Problams Problems inspector,r�sourc� Name and Size Doscri tlon dischar • revi�w�r or resid�nt sN map Type:sl�eet Aow,swale, dnkuye Oasln,vegeteUon, �i %.ml=1,320 fl. constridlons,under capacity,pondiny, tributuy sna,pk�Wwod of probkm, �� Q stream,chann�l,pipe, cover,depth,type of sensitive overtoppinp,floodinp,habitat or orpanism ovwfow pathways,potentlal impaUs � pond;Slze:dlamef�r, ares,vaMrne destrudion,scourinp,bank slouphinp, surisoe aroa sedimentalion,Ind6ion olher erosion 3 r Z ` f��i .� � �d.3 " f�' �, �., .;� S2- � N��G ' x Z ' . � � " oN�. . �i (�. � 4 re ��r� �'w Y 2 ' � o. L � S5 ��' f•<< � c o 3 7 u�� - �1��-%+ °� .• "' � �..- � v� r� ��s� ..lv /S w 0. 3 r vv �7 ` ohc : G 0. I 24 v Z � 2Y'' c '3 /2 , S9 u Ic y-S� w 2' 0 3 /330 �� .,� P 3 o O �4 .b�.� ? C�� r�. .w 1 � � rc `1 "�3✓ z'p 3 ZYoJ I�v�?cKr� r l��l 1 i r�.�LL�� HUITT-ZOLLARS.INC. • 814 E.Pike Street • Seattle.�VA?c122J893 • 206.324550C phone . 20b.326'�880 fax • haitl-zollars.com A.2 Photographs �:.iso93�o�.w�na�rid�a ES�ac�.o6..�priiTiR DRAFT 4/9/201A : i .� ��: � '' n�- � � F �y `� ? S- - � l ',� .� ' .�+s h.t[i' . '�1x'- �' � �,h •-(.� �. .�a � s ��,F�: A �''y,t� ' uY � yTy � t � ... .�� _ • .�!"9"�l £ 'yiT+;� r��.��. 11ll0�"11� 1`',�"�3 >�}�: �e ' y. _ ,x,; r ,�E_ .r. -_� f • a# + `�' "...t-_� . �` . �� ___ �� _ � _ ,_,.::.. ,�__ _. ,.� ._. ' - _ - �� . _ _- `..:-^ ( ,� �;-_<-.�...��s. � � ��z� �`�Mi�•*.+.f,�'..t � ':. �- -,-^ ��--rR— ' •-•� � . �� — � -... �� --��_R _ � -��`' - Phot�� l. A�,��rmb�r -�, ?OU9: ��'underland Estates along ��est boundary (Pioneer Place to the right) looking south. Steep forested hill to south in background, and Madsen Creek opening through hills to the left. � �;; � �;�> ;� .�,��: _ ',�. ��j ` '—.G '�["� r�h�`>_ 3Y.' �'c� 't�i�4_,. '� �� - i�-., `-�' �s��_ �� . "�.�C '�„"' �`.-- �-`— ;. "� .�'� _ i �.�� _,,� �� :� 'U�.'� ,. ��'„y& � ,, Y�+ ` � ��''• �� k s � � �' ' � '!�.2.1 • �. a �� . ..�� =.. �11!.' y � �.; �� '-�';�,.��-__ _-_ _� �- -.� �. ' x' -=- �� * �4`�t s . ��r _ _ -`=� < � ��,��. •� .- - - - . . 4A��,"'�.e ��`�� .-�„� " �i` ..� , i ��st ''�` i�-�5'�� - '�,,..�x�� .�,. � �� .,��` ...,s ' S �M �f!A.�^±��`*� .".. � - � �"�'�. ��"...�-�^P _;"'.i � v�p -v...'?y�- ~ �.j"-� ,�'�"�,_ �r� a res=..- Photo 2, November 25, 2009: Wonderland Estates, duck pond in southern portion of site. The pond receives seepage interceptor discharge and overflow to the storm drain system. � "� t v4 y�� Y h �� `�� ' � .�* �.� � �;,4 _ ��;i T�"r jq"°r�,�.,.� �:.i,� � ; ` .. � '.. ' � T i '" . . t �. .. � �: ,� � K. I�, :f{ � Y '�� '� � 4�g'- � R` -�'� �r• i � i �� t ��_ � .. _ �� 3 � _ ^ i �''3# ' r :i � q -�.`a� �� ?�y., �� °��x �4��*,.'�s.., �I�4. '::� ,� � ' � ""��' �Z� p.wg"" -g':i-� t� �� .� S..w Y � 9'" � �. T� �I i _ � -��`�-jc ' :. � .;i<"�a4 . .ibd��ee -� � _ ,"�� . � .' ",, � _ . � � � y�� - ,� , , �. °�` � � �� °.� � � �;. -� ,�.�i.� ,� .,.�-�. .`` ,� 6�°� V� r � t, �,;c� �;�r i ; ,�� ;�- ��t . . . . �:.'a$, 4 -+c..�_., »�: :: �. >,��_._ ��i1�itU J, �\U�CLILUL[ _'��, ,UU`). `I.il1�C11 I.ICCri'Jt111111CllI I�Ullll, i�)Uhlll� SUU[I1 II�OT11110I'tll I berm. �I �� - ""�„a�'�'� „� � -� �"_ a°'.,�" , ..:;:f �,�,, � ,,, . ; � �y� � �.�. '�•-�,�"' ,, •. `` �11�',ro' r�" "t ' � 3�� --wsc s. �� '"� �� ,'�=�+ � °`t � ��' � r�7�-e`��' � � r ��'*'��`� �� - �_ a y� � ��,� �,�'�'�� }� ..�' •�� r �3 a � � �y 4.'. ��^ � � � , �l � , # ' � � �t� � _��., �. � i . � � 3 11� =x � r � ! + �`z{* ~ � � . $ � {! :: �'a� k .. � 5 .�.s �, �' � � ��i � � � �" '� ..• �`'��l-rT e '�: �R' �,� �.� �{. `P� `� is1R76, r� r.'� �y-,� � {� _,� �_ 3' ^� ,%�. �' i,�i z£�t.:.��. 4 ��,`�s.y � y� e `� � •� � ,r �, • �_ `T�$ tc c� ��.. '� �,� a ."i f�,��:: � A t� x�` � i Y�' • ..%+T c /F 'l�- ii� ,`��4��q��yt�,"f.' �..�`� �"S�`�� r ' � Q ��}_. � y_..�'�� ... �� . �_� =� �'�}Y . �'M..'� ,• : �'q ,p, �,,,�'�" .+� �' -�- '' ,' `'4 ,�.� .� r ' .,�R. '�,_ , ��a ' - � �4 `�`,� ^ � ` �`�'�' y��c '_, �� Y ', s�.. , ,,�, ,�' -�'�+�_ � s'?w '„ " � '.'�.� -...�,� •�w • ,r §f." ��;�.�' �� -#�- . ��I '' 1.s��_' �� - � �.::ae.�'�- �ra ",�` . '�!� `.+. 6.-�, ...� . .� �, �,,'I � ry,.i •. 3. -�i! _ �.!+{a��, .� � ' � F j`,,`,'#+i . � I J�4M I� s ."'y��'�'l��.� �� r �i � �r,�7'��l. � ;' � � _ �- w ^i.l R �-� �"�r....s { � .�a.; ,i,.; ."»:� .°�'.�C' ` �.v�_ {�`�, s.�~_ '�' .�T�` ,,i•4'+'�ytR ;� - 'R?s'�w. .. i�+!� +t'"=- �... � �.. _{y .' .:'c-..s-r ��'_ ��' �� .' '> "y. .'' �� .. _ -`w., �: g� '/� ��+rz.wy , y�-3 y'�t s j ,�,. '��..��''��( . t�.< '�'R4t,"�� I'��. _. .�L.�fr.._iY�= t ��`�`. �.f'-'"`��a..�.�'fr:_ .__ . .�' ... __y. Photo 4, November 25, 2009: Madsen Creek Sediment Pond outlets, looking southwest � from control structures. Concrete bypass weir to the lower right; top of 36-inch diameter CMP culvert for base flows in lower center. .�''�"y��' ��...t-�� ' - � �►�.�r•� ,h r'�� i •- � � � R � ��y.i � .'. 4.. • � �� , I�'Y� g��,J��r . �A�;`�i '*� � .'>t �e+J �e• '\` i� . i!' i -��;"` p 1 ^ � � � i i.; �.: �'� �.�� ..l ;{•�� -�� f�- '��`� '� � �•� s r,�_. ��,e�-, � aM��. . ��' - �.� ��,.�. �� .4..} ��:;rli . -1 �•�•<.'��F.M. '` ^'- � � _ '""+.� ..c � ► D�e �1.� �y�� .. ',e . .i. . � - � � `�� - . a .`_ � � i "g/ .l... l �' �� _ � .�.� 4 " - �� l i � � _ .+°�r�„_7 e�'s�•� ; �a��..�� '/* s•. �`•�S�\4��a iIw�. ��,`i ,l� ��3r �-` ��r�-'s�j�.. '.iiir.. '�t 'i -�. : � �_ -A � .�`�, . �\: -��: . �f��'�.t��a � � Rsc.,�y.+...�l �� 7► t�� _ _.�`r� � �",( �.�: ,�'fi�._ '•- . :.i !'', �'�`� � : .. .- ��/�'�- �1+ ,:�} .t�''�"� � �� '� �� _� "y�� Y k� ��'! : � � • ~�e+ ��al� � � � �, � } _ ,r4�I �� _L . yY � � � �-�., Ji►'� �� s ,f 7 3� 3��^ �. � �• � � � c�+ q-a r c.•� , ' . ' -� . T � t + 3 �• *�-�.'��r= � 1-�� 4 ��' �� ,_T i .j +��1.1'i. f�-� �.T � �-a�'_ ' �. -1 � . . >,� �a ' �,F �l�r� �� - �--'. , . . �'^`��`r.'�.�.� � a�� ;w_:?��i, ,��•' . ,�.T:.� �.r's v^+."•-�-�,�a{�i. .s%Gs:-- � r .1 �• _�,; Y�_ �: g�:: _ �:.�� b�' '-- �� i�-' . .!'a ��.� . � .� S � �} ^.v +.1��. . _ . � � � � ��3 _', ° �,�� 4 � �'}`_� •'-.... :L .. �_"'it. "'F . . � � T?� _,; r. -Y`a � . �: . "$'+�'s�¢�,y,.... . i�J ��-°�'. ��, ' ld.�r''-:: � .: .' ' ` .. � .� . �.,�-.� � �=c..�.- ' � ' ` ,.+.[.. � _. ..i. � r;: , C - ��p+' . . � 3 � � ;� ;t� �.��:� . �� 4� _ . �r � `��, . � Pli�to �, Dece►nbcr ?0, 2009: ��Ia�is�u Crc:�� S�diment Pond base flo«� outlet; 36-inch diameter CMP culvert. . .,. � �'�"`-+r ::.' w►�7 y •� s �� 'Cµ- i,:'� 'cs." M � ..� � . '' i�.��$Sy� �`L.uY�S31 � 1 2 F.r,� � �� _�`�'� r v��'f��.�;r'� ��7�.'�� 1�'��Rr.��i. "�y�„ � "� � ` `b� �'��'.�t � �l�� '� ,,' ��,'s ys -� '�:`..r' .�t„ ..�a-�s-s'�'1•.-�'� "'"��. `.��.�C ',�.i � � +A ' ',� � 7�'�''�s+ � 'ti�� r`� �°t '��,.i � ��.� � ��"�� <��+� �� .. '` - .i'. ° _ � - _` : � ..#•<; Y� ; - ��1�...'.. ,�ry�,� y� . �.. <�6. ��.'�`✓' '�t '7� •! � �Stt �+� � ' /S� rY j l " �'�.;��'�",.� . •fi � ;. #�� ',- �K .,�<."tj7"f$„��; . 1 i.:� � ,�. , � , ` - �a�a>. ` � s �iv,s � � ��' S ' �* f � � f -_,~ �`�� `c'.��r� 'E4�@��,. � � � �" k - -a,. �;F'!7�•w' .,.J.� .�': ��di� : o� -�"°�,� ��- `�:;�:�`:�'�- .� M �. _'��,,,�- I _t.y ,' �` �%, "•�i'�-� (N��,�i`,�� =a�a4�''^ � t ; +� �� `�` �- �'•' � .'�,t'- �' �y�r. ,�� -��'��1 ::_`.,.� ,,� � . �.. ,. sN ' �'}Ar' ��t __�As�<<' ��.,:v� .. .{ yq�,.� i:ier`,, . r .: tif`,a b�._�'K �� ,f�`:-,' .�:i *7'�t. ��, wa ' � � .�'"- _t-�� 4 - .��j' --e ��--� ��j�-. . rf /i� - . � -�+� k'' � �:y�i►• �iJ� � - �° .a 1 �f #�r J��r• :e'f+3` t��1 ��:. ', r !�� '� � I,�'. f a w.s '..� y .Z`�i � ` �! � � � ,�}/.,;=� '� � ��.,�� . ... �'. r �� z,�'��►�� 'i 9 f ' �i'J4 �� :w� � �. F }'' l �'��`jF. �� F'°- ` � c«y'' ,�� *R =S� 9a �1�. ,� ��I.�A,� �S�'�. .`,��, �z'�� l � ' �'C.�t' .�` "a.� �.��.} + /+ � t-'�� ,s • •� ��`'# ' �i 3-; � . . '`�q �- P e - „ . . t !�"�� !�'. f .��± � -: � y , , _ i '< ; �'h l ''r•�-r � � � � 3�,�.. � ��,, i_� _ .�� - � �c'�h . .,t +�;�,E `+!�` '^� . , ;- .. "�� _.� ��,��;�►�+� .w ��..- . �'�''. �" `� #�' •, �'"�`. �'-.� +� � � '� � � � . ��i �� '�+� � .- ��F�..,�� . y� +� �4X� • � �1.�. '�� 1�� ; . iI °t .i��,I laVt'. \_t� *� - Y .i�1f��'{�..,.. ia Photo 6, January 8, 2009: Madsen Creek Sediment Pond base flow outlet; controlled 4?- • inch diameter CMP culvert in foreground. Note at this water surface elevation, the bypass channel is flowing(see Photos 7 and 8). y � �+�� , K � ♦� � .:s ti - \ �' . � .�.� . �, .� ;� �kaySr. ��_ c��i \L rpr':�>',�, ' S��y�� .� L�'iPA�� ..r��'''� \ .1�"r � '��, . o-'.'�t •��-� ..vc - � � ��i y� r. Prr C y '�',a.'/P`,i�ll' . "� '_ ,�". . c_ �4t��':s`�. . o`� �►� K'� ==�'`� ,, a,a�-`, '� ; _. � _ C��'! id \� . J�ri' �'?y��,.c'0�,�,� .f : . • - � ^t y'��C� s t; �G�s{�,�'�,�`� .�"� ?d;�Ax `�^7S"';��:��+a�`'�: . �: . r. ' .:�e .� �� "e,,,at�•` � . �,p�� a�,.'+-� 'y �� S l�'��r:� �+T�� t : � .-ti i ��.� 'raty`�" ..< � , , . . .. s' ' � , �t j; ��Y'� . � '�.j,� y �. 1 AI� i�� r�y.� ��; . .. aip8"=�.;"r�l .ri.::A-v�" t �`'.�al�^ 'V� y � �`*..�,: :JE.. � ,�.i ��. .,2 � �� -. .,r! �� ,rc �� '•� .t-��g -r # *� :1'� ^"�'-�_r�'��h� } ,��l:i�ryTd� l'_ �.�,� !��,f��'�Ar�.. �.# � -,c��s , � �.�.1 :.`.✓�9". ��-7r '414. . � ' � ,�.., ."T' � � �� ,�� `�:. . yi•'�� - `� � - - � _„ - '1- s , __ ?�p ,;`�r _ _ -..'�"�!� l�, � :rg '� . , - . �, �s., " -�#. �<•„•�-� �a J • . � '». ;� ,�.�r``� '<i .,,�.��`� � - _ �i� .� �'1►�.�' . ;'�� _ _ ��'- �.�Y�.�� ,° # , ,. �<{ t ��,:" . _ '�f `� `�"�`.. _ - ' t,, . = ' `� � �`'-= � - �.• V • �.f.` � ' . , �l`- -.. '�S. . 'T 3.' .. ..p. -.�.Y `_ !�� .. . � � � � `f} {'. `.�l '�.) y� �.,�I�`�4.' ' T� '�� .-��'� _� .. . �' � �� +�. � : % . � Ee ; � x�!` .'.`S F��j� �.,;,- a 1 t =t . . . e ��r�-' `§'a-�+A.�t e��33,�si3��'Yf�Gi��l. "L* �'_y .. . , . ". Photo 7, December 20, 2009: Madsen Creek Sediment Pond high flow bypass outlet, looking approximately northwest from berm. Concrete weir and box culvert during low flow conditions. � "��''-�� -- �-�;`'� '�"'"'�. . �" � : :� .�_. �`�' - +� T�.. _ l� n � � . - •�E �� ` a��:. ,?z� s . � t 'r � `•�1��,'�'#f - - ' ��. � .�-� :�'. i �Iy` � ��Ti�1' .��3�� 1q�-�� . . _ a � = � .. ' . . 1 , ' V _;T. �� . � C r�IE-.1..� '`�-'. . _ . ..:� - . .. . �.�#'g r��sc "_��' � . .5��- _ . . . i 4 �.'. � ��.e'� �3 �q T-Jfi• J Ji��'r 3 4 � .. � p � �►�'-� +"s�4 . � ++ "r' - r ,. -_' ' . -�s "� �� ii�'` �iR�'r��"„�„��'.� ��`t' ,k 4 < - . -- � 4.. _ - - d'�"'"`_"e'- : .;� , . :. „�.r �.-t e.,, �.� � ._�,.� �� ..t�yyJ .t,'�.'Y'�,Y � "" ,,,,�Y?�•-� .+,.-�.^� , ,�` E_ _ . . ��rj�� '� K <.. s`�, 'T�.� .. ^4.Ax.�. . " ,�i y- ? ,�,yr- �s��.2� _ : .. ..� �.-�. [�✓%� f�wr aA:� .. 4 _ _� �`�. �`�'� ,�,�-��.1_ �y,�`�� 3 s�k;� �,�� baw . _ �,A ':��v.�y •v ��r f� �_ ry"��- � Yg � �v-.� �d .:ii. 4�-N .!f. a,� . . . _� y�r''z � "�."� a.� . ,� . �. .� ��'�� R`� �: . s � � � ~� y�' � - . . _ % r F ,. _.._ � - �'� . « ��: �: _ �,i ,.,.�r�.��N � :� � - �` '� " _,�I ,t- �� ,- ,'�', `.� ��..,--_� :x, ��,� s�, ��'" �+.r,� .r � �'v'�''-� � _ � �, �, � �„-�- �";=� - �,. � _ g . �� ,--��".:�`_._,'��.. � �..�-..v . � _ .�,a - - `'��"�. .,.r•_ ,� .'..�„� �-'.�.-:�-}'''.�"r'�--�. . . -y>'�,'� - -w, �µ ,-�— w ..�, � �y� � � '� ��: ... ,�` � .� � . v_ E . . ��k;�, ;.. . '.��": -�.� .+�'r.-�..i:. e'.y�'rra=4"�;� � r. , _ .�. _ � ...+t't .,�i'".»a '} � � .. - .. . � . , - ��.tLt= � Photo 8, January 8, 2009: Yladsen Creek Sediinent Pond high tlow bypass outlet during high flow conditions. )_ � ti. �..._�. , a.Ye..�i '»•- � .r.��...\ . ..�a. ._ �;;'� Y �. 4 i' � r ,. ..j. �� Y(� X '� � 4 . � �,- Y. . . _. .... .::_ . ! � T ' a. _. ..�y .._ - ��.� � �.+ � � � , - :,, .�, . � . . , ,. �. .�.. . ,. -.� ��-�..� r:: i y .. _. �;3, ..:. . . � ..- . �i. I ' . • � . .. . .... ., � . f �:. " p�y , �^+* � ' f � �� {i �'~� P ' ' e; r � I ,��, : g �. . . . I I�� ,�,��' �� ''�� '� �<'�� '"� �� ,ufi: �� . --- ,,� . � . "> i ` ��,n. _.. '� ' _ �;'�=`.:.�.a�t�e._�. i � - S��- ! ' - �A •� - ��^ � ' : " ' • ' - � - ' .: - �.:._ �. .�E- - �+' �Y Sy��` `a� .'�. ' � � -� ��a` �j� Y. `��` . f . , � . . �y�... _� - .. . ._... . „ ' �4^. y . Y .. � z . .�:_, ..� .. . _. � � . . ;; v., ' �_ , .. ,'��7 �..: ..- . '.4. ��r�--' � .�, ' " '� �1-.. �� . -ar. _ .�.y�� .. �. + ��6i..� w �.• �- � ' �t. .1 � . . ' '� _ _ .�+�� .w„y,. 'v�s.�`•� !! :+.�t - =�1 �. :3...te='�„ y�+w, �'s„' Photo 9, January 8, 2009: Madsen Creek high flow bypass channel along eastern boundary of Wonderland Estates during high flow conditions. View is to the north. �. -. ��'��"� � ;..t �,� �. 'i�. `��"��'� .; r� ;.: .�t � `". �� a_ , � , -- • - '�i:�� l �.� r - -, -� i : �' 4f ;,.`,. � � � '' ,� r � .t.. ` �:� _ '(} ,, .� � I _ . ,} �� $� ��— -�'��:'� � a-_ ..�.i a:� � ,�7 . .. �:: � �z�: �,�� j �; `. �a i `�� . .�T � ,}�{.. 9 . t 5" ":� :_Y .. . . 'e}"A . �s K. . �.. ..... . - ` . . . , .. .... .. �. . _ ._.. �'��. . . �•-• - � . �4 . ._ . r�,��:-..> ' ..� :. .. " ...� ��._ - ,,.`e<. -� ` �,��.,�,�.� .__ ^ ` ��; ,,��.� ,r. .c, . '�g: vs. ��- ro �_ ` ' �s" „�}�' � - s� �^#�� ` l �,'�t�+ �;'� ;�^,� ^"�'� '.. - . � # ��-��'.''�' •s,�� -`�� . �' < "`�^ � � � '-«�. � _ ..._.� ��. -_ .�`.. ;�'.�.:� �.�:. Photo 10, January 8, 2009: Madsen Creek high flow bypass channel under SR169. View is to the north. Drop visible in photo is due to Madsen Creek main channel box culvert crossing the bypass channel from east to west (see Photo 11 for dry conditions and Photo 12 for wet conditions). �� ` =��.r . . _ .�� 3, fi �-.. � . �� . ,�� '� -�y "..�,� �� _�y`r_`�''i��_ .. 3..�-� � s L�-�� ` . 3 � £- _ �� A� a. _ � y� �� r� r _ , ,-:�- �. �<.� ,� � T +� t�, , k�� _ � �:�.,�� : � � � �� R-C . Ry - t��£+ln - -A.' `+e'Gn t..- ,�,+� .��F„� o .. s,� ,�.�` � �;, ;_,. � },� >� � ; �`- �"-+,4. � ` ��, � . , ,�>� _ �.��,_ ,;,�� .. �,. �.�,r -,�w � _ � .-� i� � � ; =�.,wa �--� � �_ '-��. ��,� ,�.., `�,��.. _ �� a°• - �. �� ,� ��. : a ..," ; �� y - � 3�.rK...p.�s^-M7��.,�a E ..�,�a�;��;�,�;s---i,z� 1' � �'1. s�Yv`¢'�. -.� �— '�`.��jc iy �"w,f�'�'c'.�� "`''�..wr� �� `.s��a. .�''� . � �� . ' ��k- ,�,r ..�� - ° 7«: ,_'it „ p, r�.,+�' ar � � 9`�� '� �`..�h� �.+."i �� !-3�4` � .. ` . '�`- � ~:�`, . _ �` x' c. _ �� . ... ..��z�� _�� ..�� . _- _ �a�+c.. Photo 11, November 4, 2009: Madsen Creek high flow bypass channel south of SR169. View is to the S/SE. Madsen Creek main channel box culvert visible in photo, and concrete wall to keep Madsen Creek out of bypass channel. �';�-i ' - `��4 ? .1 .�.� ,. .� r � ��_ � ._ z�._ . _. .. ,... Yn .,�� _ � ��'��I r, I� y �a • ..:g ��; � . . � e.-_ .. . . _ ,� . �: .... .., „ . �.. .:. �� . ,.s.,�- ` 1�"�r. ...� ....� �, . .a . 'E ,�. a,.d>' g '��,.��='� -•��a� s' '*'. ;� ��_ �,'yr�- '` �z.;.,. �, �.. �� -�` a �'F��h�-� .�^ �' `M.�,. " 4' � � .*� � � .. S �'$e. d ..,�� . � " —.�.aie ,. �. Ye .4 `'ue $m.r', . =a. 6_� . . �.�� - : =� � n�rt Y a . � ,-. . � • - a ,- - L'riF'1 ` � • . � R ��X y ._ �' ;;��-; � Photo 12, October 1�, 2009: Madsen Creek high flow bypass channel north of SR169. View is to the north. � y': '"-. .. .: . � ' ..�, � h ��` � � .._ �-� � -�4- . g.� �; �a �� . .� � �: �a .t. � f' .seE �.�t'�.+�'.i` 'r�' . � .'�'r � �, '+.. - ' ya� - . �� h.� �„��v� ., �, _ I � , »ss' � r�€.' a. "S�.� r,�� '�: _ �a F�;�� 'a �, . �. _ _ -,.,� � . ... . � �'��i �j, . ' . � :� �i#� ,°`e._ ._ i` - �- c . �c,4y;.-. . � . . . i15e iF � �_:;�1' , �c ;." . . , . . . a ` . . 3„�:,,�. ��3�',� y . ,.e, _ , .� r` � �1i ��y. �,:,. Y�� s ' • . .,P'..` � -.. � ... ¢ � � .e�.,'` ,, .y� .��,.,;' �,. ��- - . , . ��. ��:� - $, ',. ..l � �;�� _.;�=�- - � t _ _ yr.. " .�' ':� ��- �i�� # '� _ �. i . � �..,_.. ;. � � d ._ .,.�� t . � i ,� � � � J�� _� , � . `� �,, , A— s_ �� j �+.,. i� � ,� � L' �. ..�.�:a n� � r�y :.1 . � �` -� .' . e.. w _ tia. : � - �i� ... _ ;r�tr �.. 1 = � � .-` �� w ,s �'` ,� t'.� q�7 '�+�` � ,#� r�....r ,"y`7P��< .�•"5.��'•'a �.. 4 �`v��i:... � .� .s � �_�� l 's' �_ ♦ .w� 7. ��y�,� ..-�.<._ �� h'� � ��/ �� ' �' ff. ' wP k _ i�'� C`; ��p 4 -�r-. .�i� 7 .' , t �+:`-�*iI';'��'^ ' �� .. #i� ';.� -"'�f.�,�., , � ,�„ d y'<'t I �. �, � � � .z� * � ; � S �j •�L�' 7 • t � •w � '� • � . ,,•� r .. ' � ',�s. �� F`-_ 1� � _:` 'i ,,�i 4`� � � _ �4 [ �- ��y � �, ' �,�-� � ��i�� +vr'i_�%�`4�s :._ i �t;3 ° ,�q�� '`„'.4��/ � > it`� ' � 4�3 i�t?�'.� _' s @ 3�e��i e��`;. �:.�, ' �i!}. _� �/i rt� w�`'9�1 �� .a'rr - �u9 itri��s ,.c .t �r �'� ! dl��1►¢. �F ` �� . �� -�51�_._' /� */4;�o"��.✓'�- ¢�� tM: a *,t�* .^'" _ :` , . .» A�.'� ':,f.+� r'a:.st.��,._r_ i/��x1�s3�l.� `�/d�_� .��:i Photo 13, October 1�, 2009: Madsen Creek high flow bypass channel outlet culverts to the Cedar River. ,� -��''� p. �� .. - � ,�. . ;- ,�; • �-��._ � �. s , .� y � �� ' `_: � � �' ��' � �` � � �� `z"�r��'-�t; �y�.�s. �� '` . f t,�� -'f`.t �.�;��'.' i . ,�.` r; :��i '•'�y.r��,.i'� ,,,� c► �'� .:L. a�► ..,,....{{ ;r�'' • , "'J .�� . � ��w.'itia -'{„`•. _">y« .:"'�'...\ f� �`�. ! .� - ,�! �,T:,r� 3,�6 ��r�` k R' �,_ . .�r....._„`, r�� " ' . ��. i¢ t.f�- ^ �1 � ;�' i� !r. m, ;,> � ,r, ��• ' - - '�:a �'1_ � ,� .t'' '� ", `z ' �.:�`;.-� ti .� �a r. `, .s"� � ,� . � - �-� ��` � �� , ` ` �� r�'-� ;'. � � ;r-' r : ��C�'� ,, � t � ��s "`-w- ��' :�t ., ��,-r �' � `� � =�� -.�.�\- ��i .- l: $ .; kt "-a 9�� +'"t �'1 k��-s '�''a. �` ��f A��# - �.��i�i �,� r T� ,�� a.y ja � � �' �� . . �.. S� � �j . h,�; J t - i C-_ i4 1 `f' �} 4 iE "' 1�� ~" `3..; 1� �� `«� �b�c�£ a�e� s�"c,L a 2� ' �� pi' s.e� ' ,.. , fi� # ' ,� �garv �`�-�� e _ � , �f �, r`�e �'Ao �,�` � � ,`_»�;w„� i 4 .�rfi,'��..� . �''��.�,/s 3� _ � �r b� � r . ' �, ^ �P�+�} �~c�� p� ��y � �'"�1� ,�T '�' �� i". EFtri� t*`.cs T +�Y".,:a�,�y` �� " l�j" ��i �; � �iij ; �li�+ _ . �y I 'g . a,: ,... ��7TY, � � '�a�. � r r*e._ � � ,� �;i `�� a�.vwit x;.- Y'�3r �i + .�ul�t�'- - .� � '� s�`�� .'� ''� �� E �'� F� x *F t� s. �`�''� ` � �'' � 4, ,.,-�,�i�� - + �_- ... -�r:c..� ` p, � ��'`s .;�n a .�, �. '9� �s, � .� �' p , .+t. !� �s�`.�`i = .;� �+ � � ' � �;�a��4!`.^ �b tY�� t-w � ,�� , �';{!4 ��`...��, � , t .;n�,�as!,y �„+ ,b.�"� � . .,r ... ; �= t �, f '�t '_�r ��'.:„g�t._t«.:. . �' � '�_f.� .. ` :,�� s M . �w„2-`�. . .�'"'�''y_ � ��.� .►��f* # '�.��`� ': � ' � }. t �. 3r`�_ � { . ` �..� _- �� `' � �. � . #�i? �e�� ,�' ��'+ �'�* � �,� � r � �` � - � ,s��s� ��a' �` �" - " �'i 4 �� L �_��. - S��s. _� � ��``�� p ; �_ i ,_ � �` x ��r`Hf�} _ �t y"�" �' �'�" ..r?'.s�:. ��.` `a-��-�►� ,t �� .�Y��. �-- 4�,�� - '+ ��' � � 4� �a � ��[ � _.. . �„'_ a,� _�'':� �. 3i+.�.. ��T _i'M�h � 'Y . .. .. - . i. �' i� � � ;�.: Jg'i�.. i Z.. '�'�� ,f e��: ,.� �,�: ,�.� �, ��'+"'�i_- i��.;� �'��.�„�' y,`w', � '�-��"",�'�� p .. ?��ti.* r. +y.-. .�:�..�;�+ %�,� ��. ;'�.�� _ � Photo 14 January 8, 2009: Vladsen Creek behind bypass channel during high flow. View is to east, flow is to west in Madsen Creek, to north in bypass channel. S,�G•�- v,. � �k � s 7 �lt ,��a 4t � f'.► � . . I i i�� { *� 1`� �•6" �� „r.�� .�'" fi � �;� ' . �, r � �c s� r�.�� y r ��° ��. ,�lr's° � �r X��n� . �'td`�-�� AF` ��; ♦'' � � .�.� �. . '�'��.s�i- ,�-`�� . . �,, `y� �y �.+� .f.,4{�� '/ � .�t i �\ \' `..�t• � �.'�.'�'� 1,�,.. ''s . '��`�t�' .�� r ., c f �t.�� ' � F �5 ��.'�..�p� !7a`��' ♦ t° rjJ`� � ` �}�. S�?'�� d ".r.� 1'� �.. �. �� 'ti- ;.' y�l � �`°� . �a`P+a►T'�� '� '�� -a+` .i:" .- 1f �.' �� ,} ' "" '-,. �,�t� �.,4T� ��6.', •.� �� r�1�$ I' ;'w.i S :d :i .�i< �`� Y ��`�� . . . b �� V ;�;( � ��'`..' t "�/'� � ;5��r'��. � s�) -t�s_� �e�� t� $ �{ J y � . �� „ � � a.._,-'� \�S�.1w �r�� .�S t $�.j�.§' +W 1�n� ,� `'�n.i i�.:'Y ;'ais'�`�,�',+� ��.+ �� .(,,,�',�` �,__ -+ ��i �. L, `n .�`w�.. � ��4 y" .��4 ,+7�i �' t �� ':. i � .��C •.a. ' Y.`yI�AT. '►`^�I,� -,�v s z--}��. ��` ��*�„} ` ��,� `R � ` � � '► ! � �H�, ►� y�.�i"_,.�:� YT . ��f ;'R �{�� t�i 4 , �� '��v� . � =� ! ,.�a , - E:.��`4i�� . ' �. { ."_. �. 1 �� y6 I•i� �p,�� .K ' � , a.. � s '' � ' �A�°_",`�� < y;� , , , � t . �. ,� �„ � ,. ��.;_�� j � �� I �►:,'�� . . �'� �, ' ;� ��'•ra,,..�� „�,��`�i''` � �' ��,��'► � '>`+ = .:� .�� ,� ��t�. �,,.r �� -� ,� .� �� -� ��. , ,i � � .w . ��.�.}� '�� ,�.°•�a +� , ; , '�, a�. �f�`j�' . , * � -'� y�y: ' :� ."��*' ,� �� c�e►�- � =�.�. y` � ' , r �y:'�T�e�� • G 'a�y �� M�J'�►' I�i�� ` • � �� . . � �l:��i�a��`� �" � �t*.�,ti��#,'a�.�f, , �„}�� ., y"?�. �i- R s � a_!rt� ��7. .a,��"-� r!s . � riir`l. " S i�4��r , ��`=��3�=: �;�,��l��.6!!�� '�`U' �.�* �♦ �� '#� Y,4�.' . -.��__ � „�,��,. �t �}6 � � �� > � � .�!� .f � ��A �� '�" - '.. � ��. �.f +� :�� °,�s'F` „31 �, +� �.Lx' ,s� «.v «� ,� .. .*� `� ''`_�,,�� . ;,' �.,�i�, ;+�? .,�,ii' ., �,�-J`� �� w�1�',,'.�;�,��.,__''� ,.� ,. '�° ` «�. � ,o ��'. �.,',.�j��`-,��,,.�!�'aTh��.e;. . r,�`�y s ,.' �Y�' .k3� t'y ", - ��f,�' ��f��'� ��,�Ja✓a�a."�`�'� . i.�.�ii'�1�� t.:'Ii�..��.��. , -, �. .a�al'3�-3�. . w_�`��! ...9,�J.�1'��F.+�.�i.'tf��f.:Y��i�. Photo 15 October 12, 2009 Madsen Creek exitin� bo� cul��ert under bypass chaiulel. View is to east, flow is to west. � ' �� ., +�� i� ; - ; - < r�, _—, ..� i ' 1` . `�� i� � F�.. t a.'�°�`'� �� a.,..,tr�" � .��.. i ° . � ,��r �.:br �% . � 3 ,� 3.a� _ .. '2� � �"i�'Y°� fi i,�� j �'f:c'i'�.' . ! �� ; � .�4�;�3.a��yTT} . '� ,��; `` � �'�`�2" �r \ -- !�- 4��f��'��k !�f ��`��. # � '��'a��; .� �� . -c� �� .v '�.�\ .� - ��`� r,,3��'tL' 'F`Yt, � , �s'� e � ,�,�'�`..;�'�'��;,� �� , +��,�� F� � � ,�� a�'�� ! �� ,� �, . , �� ,. '� ,�+•z , � ,a ,,,� ` rt �� .< : �4'�o;±C .x ,�i�� ., y r�..a � �` �n� �..< r �y .�.r � ' �� ' �* �..,b w �' , � . �.,{' -i� + �.�f�� , ��aN�� . :�'�,�� -� . :�� -• � �- . ,�a�►�„�t �f J3l+� � .a � -� ��,�R�e r�_'�.+ _�--�7�� #� i 'y, t^ - .+�4 .�R'1.J x :�_e�,�e�� ..'3iR'f y`� +'.,.�` � , P�r�y��j '�� ' y �' � _ .. � ' ,+s�`« ,�.��"7 �f� ; t~�n G'�T ,=y" :`-�y _. a,'.� - --. .� q T-� �, ��. r. .+� F<A � '�� v ! y,^ ��. . . i �n +. ��{ i � .� ��zw� ' .� ��' at g : � � ��,\' �,e ��_g..� �� '':. � � �� a' /�l��`' ��v,�r�. i',�� '��✓' �� '�� ' H� � �; � � ?' �'� ,•d , �„� � jc,�. :� ��:-�..��` � -..: + �� `•�` � ' p � ,{r6�a �� h� ^� � `�� 3 �� d�-� �,�r,� *- !( `�� '�� ^- E ` s ) , r ' � � g :��" a'?T� � �� ,{ .. '� ts' ..�E � � d � ��rJ t^i`'I� � i aF..►►��`�: . � "4' r +,�� r_. �:.r* t -'e �:� i 4� �'�`+..��i�" fi � n` y "��•��F � � �,i�a.s�a�. AV�.��.•[•d��` � e�•+�� °'.; , .�. 5t �#:�� ^+�!,a�.e�`-�•`..._' .a�.� � . -�.��- ,� ;� .��-�,+,�`mm�'�j+, � `'`�a�:�:-� �` , �'�. �'��„�'. �. '1 `�'�� , � �' . '�i-h` �� '�� ♦ �y 9` �+:�� "A \... �� s �q 3i'. .�� ' ..� .� �� ,A�','� .�. � '�� - s. �r �, � � "�y� �� i ,,�� '�f��'��I y} � r" _Y II t_ A`s' ,� . � ♦ a ( � r . �'�' j `aC Li! �..� _r,�,;, �� ri,��.; j 3�M �� ' }�. R �a�:'�_ +.,`� ',�1 , ' � ' ,,�.. ! $ }� {.�_�[�?' _ , g9 . .. .,y S' e k s, � at Pa' w+.ti��Tr�`Rx� � f � � • .��f ��-%1 �`R '� �� . . �^ Q �� ib -' -� .` •� �.�. ��J_�� ' ��- � � I .1 �� '. . . � � 6�. s_ �fet+ �`� Z- � �} ' �'r��.� V� JR,� � � ,� f sL �� '� �� 4 { .., � '� � . �� ' �t !Fi • • �.' iff fj{� '``'�+,.,.�� . t��r��.� .... �`�, � +� . � �"'� � �y��'= �3�, � it � �y`:� �.ac� � A24 x! ��/ � 'f �'7�.�' 'J��4" ` �' � �S:� ''�,"�s �,�q' -+. �� _�•s • �'.�� ,� � � # k` '_``._ :` —-..d�t&s�'� __ _.__ • 3'i � ' , . _ _��`el�r`i� Photo 16 January 8, 2009 Madsen Creek exiting box culvert under bypass channel under high flow conditions shortly following flooding. Culvert submerged. View is to east, flow is to west. i � :.��: ,; � , ;' � � Ci. , � � �� 3, �r'� �a _ r> `� f��j � I i"� ..�.x � �'�fl''�� D`� �. �,�� .. '3 • ,.� �'�-.:�� ...:- -,�-- . . . . � � - . � � . . � . . - " . . 'a.�.,. '_.__-._.'_. -- . - .. �i . .. . � ... , _ .. � �< � ,� . � �, YNy' � �' �_J . ,... _ - .e. ��lA t : . � • . �� _ . `. . -. .`_•+SARY '�-�.:_ ..�a.¢�~ a�1'}�°�; � J1 `�"� . -p . �' s . �?a��L+�� "� �•'� '�5y�r. � � '"a a "�`' �� ` rr :i =.'. *'y .r �'. ` �g' ..�� ..�� ` -+C�"r � _�.��«r"_"itr_ `" � s�"�-�a;.*� �'`� ��! ��i� _�"��'��`�`'? � - � • � � � � �.��`�i�e��l�Yi�� y-, . _. � -. . y},�� y 4'. � .\k 4 � - -- ... .. F asr �,\ '�'.� ��5�'�:�' '�- '�'��.j �.I�dn' .. ' . st��E��' �� r �'.' -_ _'"s��s,- +"4;�„ � ' � � Y �� -"�� .._ — j�.. '�� .�rF '« ' ,'. .. . , Y � � ;� a�:�„aA�i 7�. i�` '^ � "."`�°`.,,,-- ��,, '"��{z `,,, _ - :;V'��_ - ��+yN,�y s,�,�':a - . _ .. a� �,�;�./� `��`` ..�t- --�`s�,' ,` _ '� = - � , _ +, . A � �` ..'iTe..-~' - �.�� `y . � . . � ' .'��- �. �- . '• ,. � � - n �- . ,_�, . . �--� . .c . �. . �� . � � � :�� .-.�_�"'�� '-�_ + • -_ .. - __ _ ._._.._.. . . a _ ... ..� .�,._.�<...w Photo 17 December 20, 2009: Madsen Creek in low tlow conditions, looking east along front of site; SR169 on left(drainage element M1) ..Y �f �s,� �. �. ,�:h ' �-,�" t ='. . . y yj- t�3� + r . �y�9-; ��..i _ � ' � `,�ti- . . T � �� '��j � .� ,� � •�t ��` � �r�' s _ . � � d � ic. 'e. -.�_' y''_ .� � t t Y .�� } a. � l � �>�1� � {" — � j�- � .. , � _ +4 ':y,, � - ' � - �C� � i` w-a-'" P, s � .. '..� =.; �.,: �^�rt.�.� '�� .�..�� t � .. � +' 4 3• * I ��, r. � a�.-, ..�..�4 �;�� I� � ;rY�� I �l�' '14��"� ' . ►j�� TL� ,i . . �. ` � . � .X��r4 ._ L� -x =_ "+r�:'`��Id�Y �� ` . , 'v.i•k. ' " ' ��1 I '3' . � .•. �' �' 'i s`v��L .a+�r '�'�+� �"� �'' ~�- . �+� ta .� �Mp �t m`� - .. - . ; ; . �F ��a�" � � � ' � �..� a" if - � . ,�., � � �-. .n �.: a�, � ii r'Lt `A��'s��s *r� + ..k��a�' - '� . / - � .`�� ,� �.h�W��,�;"�� 'v:L�E�{r.�� j��`~��'., \ .: !z .s: .Y J. ,�._'v�'+r� " t.._ ��:� . ,�.- `..sc � a s-r ,, t- �'-� ;�,r ��s`�e-. ��:. �"s!;`•?i'Ert,t.�iR�s�-�tr�. x`s ��' � . ..�� ' - . � ��. .c . �. 9r ��=airt. i.�`� " 4 a,� .�` �,�t`sr A " � �' '�y.L�._. - - _ , . ��.rPs'}'`'��+'.3�+raa._ ��e`:2 -.E . - ..� .-_'`i►a+cs �`t�-��-= . �. ' - . . - D�;��`s.r*� r• '' �'� S�$ �i � �. � .. � .tl+'_.e"t`. - �.. .-.. r"s�` ' •y�y' . .�,._ .� i6S�_ i�`�� .lY.., �'_.ik..-.-+ .. . . Photo 18 January �, ?U09: �ladsen Creek in hibh flow conditions, looking east along front of site; SR169 on left. � �...� I '� ,. �' . .� , � . �` �,. �.,�.. : � ,. � ��. �� ,-��} �.. '�� F '_.�.� � _ ye . r��{�!..i.� f +f � y^ .. T �7" - � .�. _� �� _ z . �. � .�. _ : _ �,4 _ «-� � �� - - ; _ " ` - ��* �`{�s:�, + r r �. - ,� v':�� : _ �; �,,t��-��':�e__�� • - '- '�`��4 ".�, �. �� r5: r R � ��.t � - ��`� � �t" ..� �� .� `'Y m '� . '^.::.�x- � �/'�' a°1'�"'�.. .. .. .. . . . • . y'/C(�c � �.r�.�:�c~. t� � ` .� _�.. i � a�'?� .r�,Vj =�� \ K� � ^��:''3't., �� ' ` � _ �ss�- - ��L��. � - `4'! - - . T - �4 � , i � i � - y...�7F y t ,��4i_ -- - � � . � � M.�r°` --,-- - 4ti t� � . � , � � Y �'�t � '.'f /. •�: } � � �� 4 �t � �h 't ��i � ,r��t a. .�� '� .�,1 �i t . . ' . . , ��.�c - �� i�.wx J x , �.� .r., ._ 'S' '�'`_� `e .r- +r,� "�.r� � �,�t'� , _•_ �:"•'`� t��,�' - _ �" " yn, ,. . . ' . �.y�.'. . v� 1 __ . ' _ `; � .., a" .` . . . .- . 1 " _ . F �4. h . . - � . t ,�� Y.;.. _ - .�.. �— —j '�� ''5��4 *� �., _ �- aYF ", � 3F. ' ';"4" � �v�.. . .. . �� - �``�.1•."� , `�f%i _r.xtR'�`2 '�r.s ...��,�: y �.� :.� 2� s,. tt _ ".�' . �. ' -_.-+f 4 + . . +�-+�,��. ,y,�'DPP.7�"�` +/��c,�� 'S�';^ . �.� '?��' . .... ��'�.°�:�.a� �.._, . . __ ._i ry ;.�roi.�.+�',�i_.� ... �s� �' - L; a i Photo 19 December 20, 2009: Entrance to Madsen Creek box culvert under SR169, during low flow conditions. ��-'�w�*"�'�� . .,w��'�,v.,��X,:.;,,�,.�tc;�c. ::�-��.. -idcx�:. ; .�`��.:' =-. .,',,,,, - : . s _ . .p - ,. ' _. .. ^ � . . . - _. .. _._ _ .. . . ' '��-ii!� . . _ t,.-. : :�.sE. +llr ��''"(.'" ,.� ' � . ' � � 'r �r:` -.,��.♦ .z::R�� .' "Yi�a�".,�.s �,i:+',�, � � �% '_�� ^�, • . ' 4 _, �� ,:-' � ' j4\'...�� 4�. .. ..-� „�^`-��` :;' tri,�"�,,:.'aPlCZ ' �� '�' 4 ^.t,.''�.y`r' •`� �l�i��c` i ,,.� ..v. �. --. -.. �-' �� ." �. �e- x a��„ +t'+ w �`- ��r �- �, •� - - �'+'-'� '� "'r� "?�� `^�*�G�"`J��.�,y �- � `ds� �.1 _ a-� . . . � � h � � ��,+t1'w s ` Y�`��r ..+�y r%! "� c�.�,"* ''4+.� 3Ms'::}�4 ��. �,r a� � 'r,�'_�� R � f '� n:ws lt ��F . s •,`� s'aa .iT- � ,�•- ;� � . � ��'<t� ,f F-Q� , �. - ��'� `�,M: :�I�{';� `• `'�� .,��.'°' :!t � ti .. � . � a � _ -.- F� .a: � ._. _s, ��;�,�' o : �v� - -. -� �� <.. . . .. . . . . . . . � ��'+> •a� i,. � _., _. - _ '` v� t� '� S�� . I � , :1��,� �'�� ^� Y._ � � _ �I ) z-: :•'� _ I �`', '� I . _ _.� , � , � . ._ .fi�r —_..� �'•�'--' . ' ' .� rc?.N„� — � �^3.�� h't ."b � . -�`l..- ; # V�� iu1 A� rr. --��# d=,.lA,.�x.��- '�� t�''�"�i � \r�� + �� • ,,• � A � {, � � ��• '� {��" � �'�. ��h �L'; �o � t t' +c.�'. ��+'� �� .:6: ; "�� •'•�vr' �-� `�.. ` �s esa. � w. � Photo ?0 January 8, Z009: Madsen Creek inlet to box culvert und�r SR-169, view to north, under high flow. � ;, ,, ,_� ' �'��`�� +� �w �ijl�/'; .�, �. rwi� � � �� t v ,;�,�ff � � a� r "' � '�A ~ , k� n �' �i 1�4 � t�Y ,l� ,��l.�;'# �#` . � � �'��'�� ' � , ��, , „, � �{t �' �` .�� °2�l. a� c:� a� � �' i r' � d ''�' �S?j,� ',,,,�.,...,,__� d t j , ' ,,1^.� .��,�. � ^'�l.�e � � � s� "` - _ �j '� � � � �t�. � �� .; , �r-�.� �, !�� r 1 � � � � � '� f ,�'� ,�°'�,� , .. '•4,��r �� *� .�� .It;� ��a. «`., 1�,�� .� 't � � �; i y�°� .'•`... ;�',,� � r �� '.��' .� �� .- ��;`,6�` .. "�,v�'�"r' ,; �.� ,'.�r• +>�, � ��'� \ � �i. , , 1; . ti� •,�. y � � .� . `i :�.�''�''�'� �, � �, '��'��vi��'� ,��:a• , � �=y.. ,P'�.�'�C+� � i A� �, '�'� � �..�' ,��R�� ' 11� �t�i ,1.� }� .`, �4 d��x{` �'1�� "�1,,p��/�yk� ��f,1 }.� 1,. �� ' . .. L �'�I � `.�e ' ��7�, � Y. 1 1 �_t��,�,� ` �.�� r� � �t N Lf�"„ �i�i' �� s..�y �� . � �� N is�; Y!i"'� , " I r , I > �C�_ � ti y � ,,,;� � � H�. . � a � � � r �� •�r �� : � I, � ^ ��.�!��5`. �`.Z��y ''�` \'�` ��i � .i t. �4 } � U M ,ti�+ . , � ti ; U � �i' , l, �1�� , * .�'.�, . � .. f ' - C��.,a �.'.elf.�.� 'i� ♦' _a � ..� ,� � �� "� ��.V't ,s j.i �µ y � ��y�{�l��r��i��'�1M�'�� 1 � �'� . � � '. 4:i?�l�� .� � r .1� 1 ` ik" ! d .r ��t ( � 1�,'�" � ...� � �1� �!�f �'r �, ,� / N 0��,' }ki' �� , �F ' f-• ,t�,� ' / �.�F,. � y F +' i') ,L.�., i-. ;� Y I U Q� I � 1..�� '�� , J U 1 �1^ `' tl� �1 �'' r S�" � �, �5��t ,�j h,+¢;��w , � ,�� r� Y� � � ;.;,, :"''��''' ;� v�i � ,�. . d ,,: � ° ,�;. � - v�i w,R,+ �� fi� � .b a� � �f� � S�e,►.' � - „ . -n �.. , r� t--; r t� � , ��. ,� � �—. c� a) :a � p all i � � cd ��,. ��' 1�i bA � � "¢`'�� F ,� ft'S ,�i.�. 1 �. J �� + ��' � �'�� . '� ,c � � � �6 � �� 'p` �': .:� y' �;'.� .�, •�� !.� S�.. X'ii 'd ,� �,4. �� r��.. p I � _�r� ,�b - _�' y�, � . . ��' l�d, 1 4�vr`..�Ar � � �� .:.�` �i�� li�� .,y� ��I . N �' �^1},� M� + ' � ��.��'�N�,�f ��`} �t�" �,b r � �.{�� '.� f��l,s ��Y'7�j', � �' �y.��yt � y L y.w 11f t�" .�y+�i�nn�` �� '�.r!: 4f' � �r' � t �•�'��' A^�f'_ � ( � � C� Qj �„1�'_'� t "; 1i '� �� .,D pA �, r v .sJ +�,.� � ;� �� X,�'w µ ' � `` 1 ,'�' �� 'C7 'V ��'I �#�� \ .i. Clj � '�K — `�F ,• � 1 , • . . ". �, �) , _ �� .� �J .� �� .1 +��Ql 4-a �k��ry' �Y' � �� j' I„� t ti 1� �"'t �Ql �+-i ��..0 O ,�C �, i�' � �O O ' �,- , ' � O � ,�,:. , '��r L 4 . �1' ,p � , , . �,!�`�[ �*. � .� i��tV r �• ''� �t�.! � +.-1 '�`.' ( ,��-'_'� � 1��. �� t y�" �' ��'� y��1�, 'd .��I' s.. �'1 + I /'"Y(� ,,�'` O �Vi �g.�v 1, � `� y A� ./a'V``� v� �; /' ,�� +M!� � �' ,y� N � �ji � � S 'n � N � �� 1 s� ,.� � � ��t ��ri � � � � 0 ,f��ti'. C�� 1; �. � N 3 � � � � 'f. .S� f.'.,4 'r �'�a ,� I .� � , L=:� ,r ' ^ " �" O r� . ';;� '�b�r',.�.�+„�' . ', ,` � � ��su'.N�i_�r.�i+�� '��, a ''� ,�� ;=�{ U ,L ��' d' � ��'� � f r t �,,, /ir t�!��' U O . � c��,,.,,� � �-' K� �M� �' �''t '� a� a� ,1'��"d''��'�� r i!w�Q p :'' ' y •+ ;��,N. � � ��1, [� � � , �, �� ..� ..r�. .-r � t�<�r � �r,' j' /i �.,.�t�i,,��v o 1�� +� , N bQ a( � � � F: �v, � rd � ��. . �� ' � � �, � ��s ,i� � � '� I� `I ,, , �� ,.r ,., '� �p`K y , F'1�'; .-� � �� 'i> � � � � t` � �k ��;� �0, O � : ' .� , �. �. a., i .,�,r,r �� y �:t � a � � �,,K 'u ,r� � '�. e '� .►. .+ .' � � � ��_ ...► . �� . ' � - � 7V�t.,H^{i `�N' �tl,/9R/y�,^f . .,g � � �.�. '"r d a��.._ p - !�'x, .� '� A� '� . �;.�{��'G�T ,� � 'l i'�`1 � u � � � :�L. � 'r,, '�`�;,r�A�r �y� ,`�„s. ., l. .�.,�'.�„�� 4:.6. � � �,4 ' ��r'�:-��,.f��: ..«�.. .. k�y'�+s�'��'%� �_� ,� . � ' ' ;� n^ M ��f�� I•� � �it �Ydr�y, .� ; _ �� . , :.�.�^ � � . . �,r; 4 � t - �s �-,-�.; : ' ,r = �:j (�y�1`� - k 5�dlr .n�.J� r��=.rl �{{��' . . f �.,,,��'u��.r �a:�'� + . ,� �elc !�„\�y�. �'•�{� _��: '�'i,`�'.�r.{��°'�°i - a�.�a(r�s � 'A '�t' --'!s 9�� ..`. �5 i�P- .!�� - . ' �,},'il•Z"'Z7,v� �94 Yi:�r�..�-.��. � �';.�eTa�`�_'��.t ~��-�'�\� ._ �'` ��¢ � � � •, .. - ��ti�. . ��._-,�'� . t `�tis�.lr��! , .$��- _- i,p/� � 4.r ;�0 a f� �l \ �a�_ � '^t. .•Ya ...+.�.' � .Y f:�?��' N`��• �t � , ', ,.. �d _ .-' �',r . v�..�im .`'� y ��;��:,_ ' - - �, �T� � . '1fi`.�Vt A�, ��,�•':,.� �`''`;.• .� i' � _ ,,� _ _ i. `.w�:'' j'; ��_' ��,. , a�� t .. ��. � � - � ,Cc - �' '•s , •��,�,�� =+�� r � �''a- ,;�.- °��l.;4.. ��-�z �.�'� �..�tlIF� � -r.. ��"'� l �' � a f A��; .-. _ . - . r ., � ,. �, .' � ' `�" ,✓�'i; � � �. � �a � "q - ,a�.--- ''�' �� . � <:,, �i,' �� - . . �, . , �i , `_ � �- •+- " � �' �� i'o �, .. �, _ -'c�yr.._ $..J. . `+t' . ;paG,py ;..� �-�`y�f _ - �� 1, �• ' 3,0. _ �.,i�.u��«�� ' � �I�C _ _ _ , - + 'S r , '-'= T -cy%/`aV"r. � �"�' �\�a� ~ .- ' `�'Y ;.��5 ' . �}�r"g ` 1 �l 'a':, ' , ��.�.:9 � �� ' ��(i ��.� " � ��- . _ `�� 7"�'�t 3t� � �� -li.. . ' �►-. �,, - ��.'.! .,/ . L_. �' ,t. �' } y�R��-+` � " �e� .�if�:'+�! r Y .��'�Y �,. ��" _ ,. � _ _�F q _ r. r.�- _"��' i, .�z•.- -` .Y'"r� - _�. .;-.. �;�f��Q�l� . , �`.' ' ''-.�-n1��:��!"'-T"�f $ ��s;._ :.r�' ' ad .w .�-.x►��w'�``.o.:-. 1 i��,�,, _� Dtcemb�r �U, �UU>: Uut1�t �i submerge�l ��luasrn Creek cul��rt un�ier l��)`�' Avenue SE; Creek looking west from bridge. r �,-L -- � j/' � , ` �` ; '�� r� ��'`;��► . ..y'�►{1;�r' '� ��'�; ', . . : � .iy� s: , . � r�� ', y . � , .-'" /k t ` : �� ,}�-,�. , ; � l i 4 ! I � *y� {`� S t ♦ ��+��k -� �.t'�j � I .� �� . ��• t 1 ♦� _�:•� i' �� ,�, ��.KS . . �.�� .T � � Ii.�� . �� I'�f.� .� .: . ��'_.._ !'�� .r`7. - Y �. -�.F ,.�`/ ��1 �t" {' �/f 'A, � l�,alT9��ti� ��+ 3�� t y y, � M _ !4 r.,�1.l 4 'f�_ ��,.� b .�3 .� � �� x ,' s t ��.�� ,y, �,,a��' �� j� ��kJ� �i"�� -� � ` ��.- -'' ��}� � �� `�''s. . . ..'�' �. ,Y � - "r �� '•�� r ��.L. c�. _`-Sj, ��' ��tl� ��' R�_v� .�-`�" Ft�.i;i• J' R. ��' �- •,+•�� f... �� j��) � '��'�'�� *x;�� ,�� f' � 1� 3 t - . '�� ''. :�` �y� ;t.� �, s.r. R �1 � 4: y` �P ! ��• �~�i . `��' �i � !�\ _ �q �� j� . �,� � F-R� i �� l� � �7'e* ��. �'X •�� i�� yl��t�� 11 ��R`�� r �i�+a�r ',�k'� _ �� ;..tt'�`�. ! �a "'° �� i. ?�. ,;-�- ,,rig� _ '�•;.�.� �, ,�;�,, ! � .� w-�'� �-��.` , ��►� +� �( �� .� ��'9.S'�ti w Z'"`�.,, � ��:� _ �--_ '., ...7��.1i.t s � ��,_ :,;�s. =-=► !y= - .� �� j/t .Krf�r _�:-b4 -i'. � , �"' .� . �p� f • ':. �.. �:r �:, .. s � .� ;r�s� ��" �( �� , � "� � 7 ..,.,t "iP '�w1 � .- . .a��. � �'r . D-.� ��;.� .,�5%> r ' � � •�' J� , �� _ j.� �r�y ��_ �; �� !+r y i y ' y��^ . r_ ��. _� � � :,-`g�f #� �' , �• , �; t + -} �!z .� � t• , '{ sr * , - � ;`�'� �.�`�4 H r � r� -.�as' _ - e .�.y �� i . �� -�` "��r'� �' � �' �'�� ► q }} � � , �` � � - �� '��I �� ► t��,� : �r.� _ �.•r� 7.,�i 5�, � ♦, . . 4.-.Y,'e a" ,1 �' . �si`#. �`�- � ...� � � r.� �� ; . �1.�'• [� .�_, .�._� Y' J_ " .�.��F� �� .. .. -.�� , � _., 4 .�{ .� . 4:E- ..�. Photo ��l December 20, 2009: Madsen Creek upstream of brici�e in Rcbis Park, lookin� south from bridge (drainage element M4). } ',� _ �:... �� . _ 'E �^ � - _ �?; • •�Y .�i.. . .��, �y�s: :i tt�� ,. i c.'� d c• . _ . �` x J� �" w� 4+. �', . �.e..- .__ . L , , ,� . � .. "'MF4� �y . : .r' '� � .. . - _-- - _• . . . �,�;_. �$ - aK� �� 1�� ` ~� .,`- ,��-�"'} .�� _ � � ` � � - � � � .�. _ ...� a. - . � a r. � •��` � j' . � ' _. _ v� � �r „ "w.' �. ' I�' y�a ;.��✓_ ! ,�'�"� � ��e r�M� �I 1 '_ ' :.�,,. , �. �' _ . I � . r _» _ �. . . _.,.� Photo 25 January 8, 2009: Wonderland Estates following flooding. F� ' `� � . &} �A� _ 1 ��..4 ,{ �� 3ds�_ ...._ . . /� .. � —_ wr'Ik'� _. . � - . e3� � � s.� ��-; s•.� �y� ��_ � _�..WY..r � � __��.rrli� ��-� _ _ . _�.. �.F, �-�i� +��a.r.. - _ a �i, " ...�. � �. �.x ". 1�� : � , i � � � �:: > +lu'' y t:+ .;�� '� •a-'. .> ' � . i . r�: � � �..1- ,": . :-p. :" : � .� £.�x� .: - �-±: :;.c-3' I . .�:�- _". �. , .4._ _ . . . Photo 26 January 8, 2009: Wonderland Estates following flooding. . `�r.:'s�S, f ` .�4',,qL'�� .v-' � �,` . f', I � , ..--'�.t`e. r .x. rl.' -�,s'$ Y ,� � �_ � o ��c �:,�_'_"+'._ �Y�;k.��'� .i-�� :_ 3rM+iW. 1 � . �t�•,•��'rY. +` ,.-L�—. � . � �r � . � e�YyTi ,:� , i:'.-+t#'' i • � ip��{� �� a,-; w„�� :�,� t�r�`>� �� _ ti� i Photo 27 October 12, 2009: NW corner of Wonderland Estates looking west. - -- _ -��' �,. .r�'�'s�" . ,.,�lld�� - ., ��II�,,,,,"`�''' � , ' . �_. � � -.i f�:�� _ . � �.♦y�� _Ec :. . . . ��- a� ,,. � _ ,S, > .. �� ;e� •e�,; _ �1r '� �f � � d � a: {s.—".-, �� . � .jn � �� .. . �� _ �r.„, ,r ._� ,r � � U -.+fa, ..� - �' f _ ' Y ii ..�_"� I '� , "� '�� ,� -� �+". ., I .� v � � ' s � t . � �� 3 �;� ♦ �� _ f� �A. �� ' �•E y � �:.ti9.� %14 �� .a s��'4•r ; `.�*-��,i0'�` ,y`: ,gyry, S. < � 'F ,�. Aw`7�e*i.,}4-t �.�1'�: ..A�i �t .`j,... .. 't " � 4. Y z,9 �� +4�. �;'`.. .�+f� � ♦ ^f's " t �- \� ��i�,�''��' � P �`.� ,�}` �� ' � �. S � `�_ +.. � j.tt��,[�';��'►' -•) FSI' .Y' ':� ,.� ,.�'� � r; � :i��•iirt' 'r�.. . � , �.. "t�! !„f. , � : a' ��y. ' ,. _'I V. . P � ' , .. , .� .� y . .- � r . :.i na�., ):�".� s 4 a '.i��'1 i . a ��;� , �;��,�,�� ,��-: , - " : � - _ = "�''�`.�'i.��.� ,;..°:�i�.�. ' � . .r Plwtu �� iub�r �, ?UU��: Iulct t� t��el��t-in�h cul��ert (�iraina�,�e tl�inrnt S 1) uncicr ' sidewalk at NW corner of Wonderland Estates. Note pipe is laid at adverse slope. _ -- ,;.. � _, � �,.f �.:- . � �_�. _ � -. ,�= �� _. _� -- ._' . - s �._.._-_--- - _ - ��. .�t g:��;t�`�" ��-�r--_ _ ; � � �: - K ''� .'* i '_. J, S r� ��: .... lr l'��Ila'�i��l.�! �r. K+a+.:.�'ri� .�.jr -+�,.,,� ��`� .:y?'7..� A'��1« '� �,�'� �.�.+!�C�,p.� 4 xY� �'� _.',�. � +��.� �. � i.;„{� •!' [ `'T�'+��-`S"�y s�6f` � • �^ �fl�-r ' `` .3�d�'�,• .� '�:.��r`�« p_ � .��'�� \� `i .4wy�` �"�''y��,;� . '� .� �.. ...� a . ..f"` k �"^`�cr _,,.pv'4 ,�i .115¢, �- _ _ _�- .- x-rY�,•5t'�-� ,� � . � �j�.y.�4y °� � r � � � t' ✓.'r''r'�..�`t�� 4A�!c...,� � �+ �.��- �� '��e.�°��„ �.+. v :�f �:. - . y.,?R _,.- ' '/L"T=�r � '"�+� "..�, '`'.i� ?:� �a�,Y. �t. •s '�`'j_;.�i" a _ � - •S2�..� ��.':, � � L y ..- � F �Yh� :��.. �#��.. . dQ . x. .j� � �� J� .�,t- �lnf1F' .� ��_ ^e�- . �a: i `i - � � .c �� I�. . ,. . •. y, .r .-� � ..,. . � . -�. ., � r r f.'� " H� i � . � �.. . ��I !� . . Y . _. � I� �� `�' � �� n„��fa a <', �"�� Y� •.�. �=:��'� � `' %w`^ ;3` < � _ � , � i. A �t-..+1�. .. . � A� �,,�, - -- .-� .�+s;°� .�" �"� - � �'.�.,. �,r �'` :� � ry� �.i: ��,s � ,�._ �p„�_. r. � `'`' �. �... �" :..'�� . ' w.�'�liVi _ '�► Photo `_'9 �;o��ember ?�, ?UU9: Outic;t tu i��;�l��c-u��l� �;u��r� tl';i�t� _'�) uncici� 5i�l��i�alk a[ NW corner of Wonderland Estates. Note pipe is laid at adverse slope, inhibiting flow from Wonderland Estates. View is to the NE. � �� .;. , .,,-x � . �\ I ■ �_�� _�, �. - _ •� . � .�- _ '� `- � � ..' .t ..� ^ '. .� � �'i..:.� � .. �ty �F<� � � �_. ��r � .. 2 r,> -� . ::'sr .' ,« �'�`' -�'�a . � . � ,a. ... ... t 3ir�. v....«6 _� �,.,,� _ �, � .,�yy��/,�, � �x � `:aw �i.� �.t.,� a::j,.�., "i .�€'.,, 3� . M' � ._. �.+. : . .'-.*� ' - .K.. -. _ .. ... � . . , �..;... ae �=�_--.-, . . ' 'i '_- - � �I .�_ ' . ,. ... � .. � r,i �� ----_._...._... ___ --._.__ . ., �I �� . .. _ ^'y:x��+:^R.3.� .�:`-�E'aa��.. Ph�to �U Uctober l�, ?UUy: �� corner of Yioneer Place at beginning of roadside swale (drainage element S2). Inadvertent grading has caused a low point near the fire hydrant, allowing overflow from the swale to enter the landscaped area to the left. View is to the west. The twelve-inch culvert(Photos 28 and 29) under the sidewalk is out of picture to the right. ! � ;�;,` �� =�=:�-- �` , a , }��{ �,u� < � •�--.� ,•,f-,�.� 4 � �.�"�,^�, - ; �#� � '`� � � !� �i:, ��# �;-�`��..�.. . -�s�E a• � ';s' . � ' f .. _c..{ � ..a,pi� .:T . ,�■ ,.rc' �..,�, � ��y.y?e-�_ •�� I' � - -sv — — � �r. -.a� i,�s M� � .;.' � y�; � .,.� �j__�':+'�F.� .. � i� .� F_ g� ��..r. i �..s ._ . R A � � 4f`��'�a°°'E� � ��:`3F��i T,� . -��p�'�.�'�' r ` ...:, ��r<��`-�. �' �b �`��' = ��-* ' r s - "*� �,y ;' � ��s � t �a � ��^ ' ' . .. �� . � ��v �� . �s:�e'��:.v .� . � ..� - - -.t "� . ,r�4r ��g��i��t "".. � �.,�� .� f:�^ -a��_ - � �;.� S � s, ,� "'"i5 �.� �-7"�6 �f�'�SK<� ' �t� p _ 'r' ` r F .: L�+'� � l.+�i . , .. �` �i� s �, "-Y3�x,�w�.,"'�j � 'd.A' � ,s �� '��-.. t ' r� _ 3e� a ,9' >�.. +16 � �i. !'� '�A.�^--- �. -{�' .d 'z'` ; �'� �., t, - � s -:�.�;�v ♦ �A' ! .�. v . } ��. ..�. � � t: �:� :,e�'� '�, �y:d i� ?' '�� c st-�� t_.�s}� -�.- � ��G'.+tf��;�. �rrs�i�a�`` ��,�"��'.,q/_ ' r y. ,.i, v.: '��'r��.+�J� s'��-.��.If� �� .�S�a �a � � � Kt.� a_.' y�s5✓i i�i �i,' r �'� ,�.' •a � � ^.$.�: �,Ya �� . , ..Y }y . ♦ �s' .k. - �f� y x.� ��a�t,i �� yt� ,%Rf , � f� .,��\�" -�+�{.. . .�'l"��f .:,� � . f��'�' c /�'.��jlj.��►.,��}/ �d� �4w.�ti ;Fe ��'"�� S�t� _-; .sr ��r�r�� />��' �.y/' � :+/��}q/,l r d �'�R�-;� �'.? , •� �c?f,�tm'�,�� p`.�,�� `' "`•`�.i�`..Js r"'„'-�,�Yicf�dlr•;'�,i��J��' ��'�.i ja a",� � �; �� ; �� .. ' , ►.� Ty . - -��b�- �" 'i;� .�j� �4T'" �� y� j' .:a„�•, Y�a'��.� ir .:4� r.�<+�,n�v{�a''.�°�' �►s� �''f f+��,.. tr�f � `��y /{t fi I,t�� ' �. !,,r,�� ; F{�� t a '.,- ers t e•,8 1I�� > > � ,t ,RP°�' 3 t, t? �?� „� �� a i � �f � �.��$��1.3a. \\`��11a t �� .��? ..f �'� �i��}1"'��y�-�:°.+-��y��a�T�,�' �� a '�•�i'�" ,�,a � �-�:; ✓ � ¢j �.{s�'s' '�'�'; "�g=�{rP��l� -i�r='�� r�at��i �` "'� a�.r,'y.��i'4Y��t ' '� �+� � �. a- � . y{t�'- 1ir� -.. �,. . � , ;�.-, �� r�4'�- �� ,F. �, -.� ' �� s�# j' .-:t �...'f - ° t a.s�.�,� .,�. ��&�a � '�'�' i'ai 9�+'� >� j'+�'• a .�: 6 .' ! .�itC� �K�' t� - � ,/�/�,� t �,� �,��t�/J��, ty� � ��.,, �. ��:�a R .�s � ��• � � s_w_ _.�.+�aiv�*�:!r .-zrs�a �. � . _. ._s�'�a.r_�,__„ �.d$',�::i+��,�i� >sArSi '��.��i�$�`ds�..aF� '�1.� . � Photo 3 i I�eceinber ?U, ?Uuy: i�liet tu 1 a-inch cui��ert iii s��alz acijacent to Pioneer �lace. View to west (drainage element S3). � '"�� - . _� � � ,�. � �"' ., �� , � �� , LL � _, +� . ._ i �� Y -�� ~.,�� . �� g:�t/a.l"y'�p � 1�� -<-"` �_r6s �-� . -w-h - � ,t�l._—. -^"'��. xs ..- � .. . . . . .�" "- _.. . . , _•.-=-i� -�. =�' �u`� � " � "'. " ._. . .� � , ��._ �-�'`��ks, ..: � ; • s.-' _ -� " �', �. �' �� ` �t - ; ,� '� .�.: ��-� : �� , .,��`�_ � y ; �-�� ,�+�� '} ��; �k"" �� . a�;i,�,T �, �t} i ��- � .t �A� . i � _{f_ j `�,fvF!a..-�. ~F�s � * Photo 32 November 25, 2009: Roadside swale (drainage element S4) from near NW corner of Wonderland Estates, looking west. c , s , + � ` �` 4 .. � f �� * � �� ,l� �.�i � . . �..� .�4�' #a�- 4"„Z ` , � . ^ M,`�.�.K�:- . �� .�__ ' � . `�,. � • . � �e"l��yl � : !� . . . �_- "��_.. .. . lur.��...�. _ . - _� -_. � '�V::s.y. . ' . � r-�%. . .- .. t.��y . ' . . .' . � � . J - �� , 4� s � . . . .��_ _ . _ '� �'_ 1 . f - �.,� '� 3i''t.?y� '�en 9 .-i" �. ..,�.i,�k�w, . . 3w_ _ . ,c `/F ST.. � �fii�S� t� '`.. � � � -.•�i^T��,L'�`f'��- ,t.rq."Kr R�ryI ' #is.+_ _. f N . i`vv �'4--�,�aw. � �� :'�. , � "€r �.�a�'� _ "�79>� r'� t-'t�. F`��'FFh�� ,°�s .��1 �~ - � . 1 S t; y r. : �t` �-�'` � ; x � . . .�i i � r y� . �. ��, ,,� y-, „� - { -+ ' • ,.}. 5 J'�►�0�� . � -�-�. 'i'r � `,� - T -a�i.. _ ,� �".�� 1!*.�a''S'n�„ � _ , " K � f t7� " � i s ¢ � y� ��y . '�- �'�'es�*>. 't^�', � �I �r i--/c ��- y d�. � ,.3 ��-eA�'.^ s+.�7j.,r° `.-, . ,��F""Y��"r T � � 'M � 'Ei'�� C YF� �P C/ , � "'�� "4 _ �yi'r �, +3 � q�`-•�'�i'+ �!'f$ �:. 3 .:'�c'�, �x.:�.._ A� at�� ,�,w MR rs.ra.��7'� •:air��3 ` + `� _. •-:� .�T r -s�s a .� ,a - yC '��. �'�- aT�'�».- . ,, ',� s�,y'��f �, �. l� t�F��Y^{ }�'��„.� � ..^�. =��.t�-� �[�ty�'�'1�. �r�. �� ''S' �-' 'r� ��.wE��k.��., �`��t � '�� << ,��'Y ,�, �� «-�'. , � •�,:. -��..--. � -"��:f-*�,��.;��''�''".� �N � . 1 � �t �I �� K�: ..,in �-eG�' d", , t1 � e. '� y? ! �'v�' -I�. ��`,,;� .� -� - :��r ��-� �� j y4,i s v;"� �r��, � .r�, •. �� 3S . r t e - ° j �,�.�� K�'s,.r�,��i% iP - ��: _t:3i° � �''',:;[a �s� a.v �_' ,j `` .� T : y'•� � f� :}�" _ � ��-�;;;,,- , � —r:�� Photo 33 December?0, 2009: Inlet to 1?-inch cul��ei-t (draina��e elein�llt S�1 under Pioneer Place driveway. View to west. �F ...... YS��'�(e�.R �ey � �'6T�`J'�A.-,�� i r�� j � ��~�w tY�� ... , ry .t� . �.. aiF jj'l, 1 ��''�'��',ji 4-� w � �'�' 7!�/�t '�:4L�i,iV �� ,.+�,�'''�. _ .• _. " _ ,�/ �... y.,+r � '�'� �... "+.��'� 'f" ..y�, ` � ''`:• g a �Sd+:.� �� i'�a w.�,~ -�a . , - :"c;•.. _ ` .e. ,.,�, . "' `ei . �{.�J�. .it . �"e'' , ?'� c - z'��'��" ';i,��e{+S ��'��,�ys;�.��`.� _,:.�- • , ; .y::_'�'� � .si+_1y,,� -�. ��• .. . , L+isti . �a� Mr��• �.-�wF i h rt+�" i_: 'T� .+r . ' - - '�` � �. ��,� � •: . � ` �; .��m�� i.;+t� � �..� . : , .;.: ; �� - �I'� .:-~: - `�A�,`�. 'l�,�`,,r .. � . ��T ��}�s� -��J4�. ��I i� !!�^4��.i Ni :s - � - _ _ ZL , `�� , r��.:--�3 ,.. '�e =:� � �Y' '�,"�,�.,i . ._. �1 •� __.._ ; :>''�..-`�.�� . �'•�ypa�„�.,,,. . , � t. - . � , . ' �. . ~."''S' "�-.�=:i+t ,� � � . I. �lq�-- "': ��..��\�� i► .�'� .rs-t - _��'i• r �`A� �!� .. I . . � .,�` , {i � .{� ,�ji.yp !� ..,�- �, A�,: -�> ,�. ,-�� ' .�. i•` -4��""1.`7�►-.�,�.��\ y��='-��' :r`�1: ..L'�.:_-ICi <;�'�,�,y'��'�l�Jl� � �� :f. � '}��`•�� \�� .'* . 11 II I+1i1C1l � l7'J .'� �� 7-`_{��: �`R `R j ` �'�� y s'�. `: 'I i1�lY��i�i7lli1� Y" /l •�t- /� l v i"Ow�' � _ , .i� �`� � } ' 3 L7 i�i - :-t . �1� � \ a - ''.� � _� ��r �# Y.w. �i.,,'�� 54�� }� . .aI`� ,�i.'�'�^ � .. ,h'� �@�!� i�' ,+,�`r � �� _'`�r�' �1 �. �, .-� a++r' ' - �y _A y � �' •�.•7\�Qf'� ��- ,.� �4:i, !�� ,'ja�"4 y . . . >..� � d'>.. .. •r ..�,,•E� y. �, ,��n'�.�� s_�,��. • � .. ' �i �y�► � '.' �r��-}�� , . . �4q.\t�R��, 2 +�/�+�-kJ'! ^- �� . . :,��,!s'�^ .�I � . SA� -- i�.��+� ! = `.�.►,n.als�:�'�' -a�,�'i?�s ' =-�:+'-, -.� � � . .: � � ..J �F'MIV�'�.'> „� "�„_ 'a �'1- �11c �`�'� ir��t�} p .�a� � � .fii � },`�'�' �' � �'- r 1�'�'�-� -,7'T.` � j;�� ` �/ �B �� ` 8. S�• .1 r • "k � ,.. � �'��1�sk . \ ,rt_ ,3��,v;,�•��f, � � �..��'�,�y�, _ _ _1�!�,�1, a� ,r , . �'�i'+� �i +• _ f;., a7,�,,,,�'3 s r`6 �� r. ��+.�f ��g.��l ,�'�a�4~� l��il��'%� ''�A��Y \� •��" 1 C`>'Ci`_?''� .s�,. 1. �iu�:��c��, �•.'Y��•n*.�.�r�ti;�3�' S .. . , ♦ 1 ir�-�. -i �-��_.� �'� _ �• j►�8�\��.,,.�i11... �� ''',�,�'l�•��,�iti.�i Photo 34 December 30, 2009: Outlet to 12-inch culvert (drainage element S�) under Pioneer Place drive�;�av. View to east. ='� \; a �i � o �.:._ � ,-=�-� , ; '' ; i � � � + .�� r � � � � � � �z�i ��'��- ��°,;�`'��` � ,<�..r-::,.�._� . : . � e • � _ �� .��... ,.� -.? ,,� '�'T ' � I{ -,-_ . �._�, _ , : _ � � t,' ,„�_ , .F. z � `�..�. �; .�-„,�> .�� ,s � �r� __ x; � : ¢�� a �� °5�� F�;� . i � �.� _ >z ' ` `�+p,-_�y� - - - -� ..�.. � �.. � - Photo 35 December 30, 2009: Wide, shallow swale (drainage element S6) downstream of outlet to 12-inch culvert under 145th Avenue SE (Pioneer Place entrance) (Photo 34). View to west. a._ . �;�: � � ,-� ,�. `� "��1 - a.;�,x ,.. ;�;, �, _ �� . �� . " .'' �� f — . , P_. �� , � ��..�.. �.,;.�,-.e"_---t- ��.. � <:. ° ' �_ i�,�,�,,,.,. --�_,� ,_ .. - _ . - -�__e,____._�,_._.�,_ .... - _. --. �..�,-�-� �r�� ,_�r�: .. . �, _ � �.,�'.: .�k 3'.'�,�,"'�.�� '"�-`f �"a",��=.r ,—,�,��3-��-. � � � - �..... .� . # ..,�, -f,� � �. �"'�° � ,.�. - , ` 3a:�,.,: ��,'+�..d¢ " * s�=' � �� _� �� ,� �. E1i.'�' �* ' �' . ..� i '�4#� � `8 �'" ' c, y2�{fp�, �� Z�, '`�',� � F � �. {'�I �S�' �. a � - �.i, y� � �[ �� <�� r�' �'�.-v � ,�_.r. �� r . , - . '�,. .� - � ,: . `'. ` "`5�.�:, - � ��'� -- r � ,i� ,�x Photo 36 December 28, 2009: 18-inch culvert (drainage element S7) under access road to Pioneer Place detention pond. Culvert discharges road and site runoff to Stream A flowing south to north under SR-169 on the other side of the access road. View to west. I "�` .�1` , �'°cro" t;: N s :�� Z �`��i� ��,' bA +�: � l � :�� `y5 t�. ` ..� �`- cd .; + � g } t� G ' ` � . O ' � ' •�" � �i ,a �� 1� \. '� ,,'�'� �� 'b '(A i� �' ;,i. �"t� , � � , J ~ w ` w .. ,.1 1 t1 ` ' y, � ' , ^d ,: a � ti a � � '� ,; ..i,, Y ;y 'j� n��'��:� �.W`& ti � p r 't,. . i t� , �''�f .,k M,� .A �n�� i, �� '�9 � t ��* � ,� ��i"� � �. �1,� '�� 1�, '�� , ,�j��.�' �w+ Q � �V� f, ,Ky y��•,� Y� �UdC��R y;.4'" O �fJ� � � .�; �i.. Y� K�.A�R . !" . .� �a, '' ,v��. .•�.� yi � , 4 � � G. ;s ,c� � i � � o _ >-� a.•� � -r: �� r- , « �t, 4 1� r � !. � �1 `� ",�_ � r��. "r�1. `��f'_�i• �•1��. ��a�, t ��'. -,� ,:� �' � ;. � �1,; , � � ��t�. �r;. :; .�, -'�;�'��j ;,�� { 1 / � �,�/ �� ;. � , af r �� `��v)� 1J� v� ;!� � i.�'�'�s, �; �.t•��' '��k'� �'''�� = �(,�!�'�i��•�'' .'+f` � r� ��, � � w�� \� �� :�'• a�i �tl 7' ` . ,;�'w��' ►� 7'`�� `,v�� y��e�� ':: � �.; �P �. ?,�� ,..'FE, �' ...� ��,h'(` �.. � � ��Y� �;1�, 1� � ��',, 3�►r �j' /�r'� fl.l��C.�� r", �, � I�I�'�,p�� \ �'�,�� +�rpsl '��''', 5,. � , � ,�' '�,��f �.,,� • •'�it: .Q�' � "�� ;� ' N�t#�� M';�� r�' `��'� �" r� �'� '��j��{ �,,��. 3 +-' � 1� � l�a 'I"�..... /�1�'. ,�� I�i��I��YD 1?� ��,�1,.�. . �„ .� y , � 2`;{� ��'��ir.y ��.' r �.,7��' , Vi r ��.,.t�',{.^ - �':/� } � a Q:-%A� �y r��l � 4� �,r.., � ,;� �� r .o k �� Y�.iS.m.��'± 0 � � ` i t � ;�?� •.y�''1I6r `g�' j•�� m• � ��MI .�� ,, ; 1 � ''�c �� ,.. �� :.�-J 3 . �/ .� \ �_,�y�;!G � .� /if.�' ,�! , yf '' � .. {� �...1. . .i. +•j, ^1 �n?", �1'^'1 1 � � ��',�,� �T-a Z �'�Y: ��i��; �Iy�1, �,'�� .,�x , �. °*�xil�;^'�'�'�'�� .�� O .�r � .,�, "1'L�l` U � y � �. r �. � V' �� ,.. I f, �r .' Y ,S� ,. I. . ��Y �Y.,;` � ,�` �.�.e`� ,1 + � �"'�,�.' �!� � � ��. , :. � 4 t �'�z . � + � � � � r 1 ,A�� a ';Y��r6��Y�'t�,.el �L�r � •��'� �Y -1�. � ,,�{�:P ,�. "# ; f ,��;� t � =�a. '�r� w'ra�5� �a;�y��+�.,�, � � G � v �� , �a,�► ' xl. �t' t` �.` �i � � yL1Q��y',Mp��•'�i �'� �Z' a�_ ,' ;'7-2��(� ,r}�, a,'-�` ��C y �i i ''�'3A,��' ` � � ��,I' n • `� 91' r'n� . ' *� �•,yq . � el �; �."�: . 't �A i"'�� '� S.i �, Ri, ti �,�a .��tM' �'J� ,� 01 �� '>,�� ,/.7r,: i ��,.n� f � �� . �d� �' r�i � ,n� n � 'S � X� � � � >;•., 6'- j, ��tll"y ��./.,{�.`�.jj.. � �r�1 �'�;� ,�+'.jl.�. Y�� U O ..y$y ,Yl ,d��),.Y'"'1�L 't y t' � �' 4 ,� ,Jj �� Sf .I Ul .�i L'i � ��.,� f/� � , k�� ,s .��'�1i • tr" �.r, �x�'?�.'„�� pp '�p, 51)� l \.., +� . �, Y. � f�l #Y (.�µ `� � ��,. ,,. ��,�•} ��4�1. .,t.`� � v ��;A , -�t"'i ',� � � ia �t•- ,�I,,� 'C , ��a 1�► :C ,,/� t r ' 'iY � � '.� 4 � � 7. �r � d ci.•' L�' W ��`�ti �i��t�� ' ..�`� �1�.� �� )'I .� iV3�� N , ♦ �r �l"�' ':' � °�.` � C� � ' � ��, ' }�S ,a.. � 0 3 4, " pj •,. r ir'� ' �i d .�i �r� t � t:f , � `'i'r' r��`� y��' Y -� � �� Y � ��t �1.r ' � �.. �'- O � �!e? m �_° "4^ � v +� r� 'r r�,�. , y'I � � �+� ��'� 1A�� ' � •b „�:: `� i� � � ��. �� ..� K'a ��x �, :�� f� +.+ �, . �s •Y ti-, Yi.;- �� ,,, b,. � �'' ,� '� . � ':Y e r , � -�. r ''l.,{ � �.f� �+ a � � �� .�✓ r ._q (�� j�• � �@� �: � / y Ql � �+�� i �.'� ��V��(M.1� �,, ;� �� O � J Si... *�v � � .+�' }�' i.. F �. I ��,. /�� > � � � •-~ �x,♦� ! 4 i Y" ti .r � �,'��''�! 1. . � �t'O � '��s . �: �, � � }'� •� 't�_ .>�'`�'r"� �1 ,� ,ri!';S �'' Y •'�'�,r . h,y � "'!f ��:��1y�� '"q r �r�p� b�f� �j F-4 a. � � � �� N F��t T. . � � ,ft f, Q.v�' . �� rF..� � �,"' �� 4i' i �' '�7y' �V$` t 9,�e r. 1 J i� 1 j , p � �y�' ,Ur��E,; � O ��i '� .T' �+� . �'✓ . � �sp i�, , �� o ��e�+�,,� . t, � �n fi '�� r� � )!i"f`t a.�i% „ rid � , ",� � �;�'' c�] y "'; T., �o•li:t` r, � L. 4� �t 1l�A � ,�.�. R,��s � .�..t�. ^ 'b ��y .r�' -:r� � 'f,:� �c :��,•.�.' �' .,.., . . i �� .�"' i ..��d� P � �I►R. RI %'�� '�A, '{.�.�� j�� :: . ';�.. '� � � `.�.r, � � + -� � � ' �-• i, �'`� �', 9 :✓ .y��'y'°' ��y�l�'""`� 1{'�� ,� � ,(�;N 5� ~�,f � � • .��"r�` `` � � r,. '� �,` � L •� U �� `�y� j� y��,t`I�� :I�):� �f,.'.��+},. '�" �., , I � ;J �. � ti , f ' � ' ,. . ��.fl Q-� ��.�1"��fT'{D��Y ��y}�r�� ( W' '�� r'��.:' ^O � .��i ::�`' �. . � « .�.y, �a$p' J� rr � ^��F. ; j��11/ � �`��]��Il1f Y� . :�� '�4.t � .i.� :J � s, � i,�' �' ', �, , � i► ��,�g�� , � . � U O yY t �..r� ;) U f �� 'Y ��':� � (�I�+�d � � ��,i il`�� r. � �s, � .i: � e ;� ��p. :�• ,� . q1�, �,t�, .lypy, �1�, ;�� ,Q oo ,�� U �6 � �7�e '11� i. .�(5 ' V 1 `� '�"At�'Y �± . 3'E � �'f�� "I .� .�i ti•�w ��,�. ty1 �^� �,,*.�� .d n ��Ir� ��y }� � ��i. �,��.i, .� �.! � Y + -ar � ••� � .M'� tv,'��/ �' '� �c � '/�� . R" M Z." �' � � ��, ,.y� }, y,Ali� t. O � , �� N � �?�-` � ��•; i•• , .�'S. tFr��:1V1 '', f, ti �� + .�." y � �,y� �' r ,�� ,� � { �r ��!R;�,", �3�'.��d'','�� •.:i'1r.^�-- ',.�i?; ,.q�r"�";'li' ;�5't a � � �� _� . _ a 3 �` �'� �-�;3��6�`v� �ti��t�� -- "e� ► .�. ��tr}it Tti1S.-a.�?"' ¢. h' , f i��"'!�; �•t► '�L! /�/�yy� � ��'� : " y� �� ,. ,,,�,,y �. - � �,��?�: �wr1� /�.�� ,j��\ Y�q . . .. _ ,_�.��.?k �;V��-{.ca.:..''.'. . \� `� . _.... -.s ,y,t, .e.�.. . _ ' .` . . ` 't .'" 4'w�+r�+w.♦ �-r�. 'r' ...: _ . - . ..j �,, . . ��` � � - . (! . -._ . ...t�.3�-y T �s. .a�� _�.� -�� ; �;� ,�.�-� .. .-� ��,.vJI� ��:. g.� b' �, . ��t}�st n�.`-e' . ` : R � �`sX"'s � i�� 4� ?�^�y-7 'r r �. : �r 1Ks� .. r�'. r- _1 ..�'� .'�`� ';'i' �`l i +e�'. � ; r�� . �x �j .�,�• ... 'i _ �L `i"5+ .iE,6 / � a . y J�.�� 's F a�.:� ��.`.i`' x_.�, . ��e��S�sa� ?i�� L Y -'i � ��A�t'��"'C",7 � _ ?'� ' S � xt� . �..• _,��Y.... ^�..a �� y -1�R. ;r ��r 3. i �� S v. �/ �_ � J a s ��y,�y �'7. �':� . *� i� r� �:4. �'y:- _°" ' '�;� i�� i��'�" 7�=o:'i<.��r�► �'°`' � �.'v�� ' s°�-' `�i �� +�",_'-) p�1�� y' � _i . �� -.-�5�•.�7r . J',.lp� r ��'� � `. � b -+��. � ��,� �, �•. � �� `_ �r`��;�"y!f �� '�.r.�a�-� tr =;F�'!��!+-��.�+�;;,��a f+ �'r� y ' �'� ' �4 Q �� - �-.��:_,�; : r . '?- �..l�y�. i�Tiv -- t �r0 #'�y��-.. 4�.p�� 'al wi.?, s�� a '�*�, ��c ,r"fi`i .i �y...��'r � �ri �� / y 'C.�i"�--' � �� ;A '..".,,�e . �' r� 1�'�F� i�y� '.�' �t-�, l,� f�;�r�?r� �, -, � i; �- •.' ��-�� y� + ' "' •��. � �.yr-!r'�,57„ Ti� . -�i 1r . �`�`!�`•f' ' i�� -_eyary� �'�7 �� ,`.��y^'��''"� . �c� �" ��+,��'�4�,�t��! + '��Lc '#`�r 1, - ,ir ` y T f* Y �, � 4, �� - �� y4- : ��: � �� "`.�� `+-� 'tr .�.��'�R�-��,�"l�.�t� .�l�t�� r Y` F .�:i :_ ,�-: .``"�;. �y�,'� -�.�,,. '� ��: � � �� i. , �� r 8 � � s- ... � Jy ;' ✓ < �'1� / T� �� `{ _ s�..Y�:'_,"' ,� ; .h� �1 �''1 �� ,�'.�-�� `,1,"s+;��'•��!�' I3, ..-+ �, �.. � �4.-�9�i��.�: $; +f'"�`� ,��`� j�+�' .��a,-� ,� Q l�r�y . ,�c�`:�, t it j. ��"":�:'�� ;t�' •��a e� „r�_��:.�li�E�'r�,��` ,��`aaf+�.�L's C��.��►'ib��c�v' ,�.x Photo 39 Deeember 30, 2009: Inlet to l�-inch C1��IP culvert (draina�c cicment 10) under trail on north side of SR-169, turning Stream A to the north. View to north. Another 18- inch culvert is located about 20 feet north of this one, but could not be photographed due to darkness. �,; � . �, �-* �; �r ; � � � �� _� � ''��:,_ ti��a , .•s _�� '•. ,�,§ �: � ' �• „ '�,s '-�, � _�c Ir*: ��,. :�t' �;. ,. . � ��-�4'w 4, �} �..,_ .: -��,.�� ., ve.. i� x.e"r . _ _ �i - - ^�Ya �- � ; C� �A� �. ��j� y-`?R�I^_ '3�4�.7�'�� ,�s�\� .� �. �ta,i 7_-y.. .-+ � ��. t +.r1 H � �, • _ �, �,� ;,� ��.,. —..��,�„��s�:��.� � . ��`5-;,�'i' � �;�� ;, ��.��j�'� . � � ~ F �._y.i.'':�'. � �xi,�Q' .. :� � . � . , . . ' ��aav.il/ll�i� i , �- -�� -.--. .. , �� _., . �,, y'�� '= x _ � 4,." +� �� 'f�'%' �1�'- ' 5�.�_'�, �r r a��.'jM��i�t+xi� . �-:� i'•, 1 �' %� � ti �...,,� : i� � � � ��e �.y3�� _�T�;,,��zaCl;/g•e.�.,s �'i.� � ri . � � � �i 3-+ .v.e �g . . � . +�{� ` .:t - j � { s �� >Y� y�� v� ff.r } _ . � -- �� -' ' . '.. , � p �a'�,'� � T� ��. ,;s -�.� �;. .� �- � r� � �.. - �" j - 3k � �_^��t�+r�_��y,�� _..y. .; � ,d,,�.,t.:'i .-p�;�s-•�,Ss3" .'�'^,�►� . •,Y t�:}�; �� . � "��/' -''+'I..�'.'i/' � `�'T`�, � + s,I y �.,.tr5�O� �� F' � ?C d f r L ��'^ �, ��_�� ,kP � . ` ' �� f � r . ��:��`� '`.� ,'��'�'_i�` ��.''r��-i�' � i`�� ,��w� �� `};� . ( ;. �,�,v�� - r' l�,..lr- R's��t-'rt'`�Aa�F`�� %�o�� y F A=?y°�� ✓ -��. a` �-t:�y ';� �%' � a..- ^-r.T � aw•� -� ; - . �, - � �r3� ..[� � Yss�'�w�s'�~,'�-��'r � s��: .�. ..t �i --r�� ,%�.�! +-. "�,j'. • 'IJ T,�,�, : - � � � " � .- . - ' �� r{` �� , �� ' ./l x rC..' �M v.r�`��.9��. �. � ,.�.�cV� �v/'tj�'� .�ir!.� 1�?�.r• . �. �`- �� . �,�� - +�Iti -1..,, ��.� `�� -. . ! -:. '` , y ` ��. -�r ��,' � � -�!.� �'.- -f s ��e•�! �-�.� ,>.i �.,.� ' , � �`.� , �re �„ . . � ' � ' �i �I ..' ' �J��,�, a . l'��: �S„ �r'�7��`'�7i,�►- ' �t t . � , ��+t � .� � �a\}`7� ` � r ��}�� '� - .s�.�- .� �� 1�s .�.. ��L��.�...ai�"�1�i ��r7i-� "r_.e��"v ,..+"i��.��,i�7F.d'��iv..- a.Ft1- _:� �' Photo 40 December 30, 2009: Side channel of Cedar River do��nstream uf Stream _-�. � River to right, with log jam across opening to side channel, which flows right to left in picture. . e � ��pF•p'.. � I�+n,� 1 .. 1'�I 4�i�r�f+� � ��1 yMT�� F T��:�f .� . }i' A � '/•� \� 6�� ,.q Ja \ �'��rl y��.y� j� t r�,; N�8.^ I .+�a Y j1�. :�.\,. ��t .�1 � W ��6�{ �T `'�1� � � e . ;Txh'.. �.��„ �;.� ��A�� Y�4�y� t.�� 'C ,l� ej '�' ��j ! ..,��f�� R' ' `��, �" ,1 ) � '~;� ;i `� ,�". � '�%�' +.�`��`�''D�++�' q , �1�1! 'P �"F[�lr� � `k�lY�� . /�V. e t�,,r,31i w ..�w, .v m1 � � ,,�;; �,. •�, .� d �`,,` �� t ��k1 ��, _ +�� ., �¢ � � A• +�'Tf.f�7�� , v�� a � �1M.:�� /� � 'y ,: . , y�'� : � • '�„�.,� �s � �4r- vi', �, ''' '� ��,.��'" ' ��"� <r�.n.� f ,. , , ;- � ,,,(((�� , � .� . ' �. .�\ j��'�i ) ��.f 'Y��, I�. f. �y�. ` y. ,. .��.�`. ', � 1 ?! � �c'�� "Jr ` ,,,, �l a � y c � r _ . `� r t�,'�TjPr , � ��i� , � �;.eY� +� �.,� . �N �•R!,� 4 4�p�, 71��t�, q -�l.�� ,� :� ��,,iL�� , ,{� ��`�� , f ..�� J�:��, �` '�' � ��y ' ."� � a'*A��?+.� � .��7\r�� y��V�� '�' /� � i .1 r f c /��'P ' u` r N�,,}�� 7 '�. ' w f . ,,�. � , `�� Y�'r� V► �.i/.1-�e(�.� '�� ,��h.7� ��A,�(��r��t,. I�'�r/�� n/ ,/(,,��i ` �M` `�, r � ��' r. �� ♦ � ,� . � y.M r �y.�.;.,��„�-�i�-` M � '�•i.�w� A�1 �< ,� . � \ . ��,� � � � �, � �� ",� �r' �d„� V� .. �`"�'i f �,��r.,�� ,�� 1 � ��TM.s'�,��; , �� r v-� i`�' � � ._�. �''�'�,�'` *T'�,R,t ;�p .'�'�� r a 5� .� �';. �`� �'•, ,� � .a +� t,. �+tioi��'� �� f;; ,li "�� 'Sr '! � A�, :�f � �' C,�'.' �a � � �^.. ��1 r. (��'� ��tb . /�. U �� . '. ,k 5�� t�.e�' t '�1 , `„� ,;; , ��-1� � .��,'';t /\-.Z�r�C� �� j� '- - �' k � a� ^`� wg��,g��1� �U��' s- �' �� bA ��",.�ia'1�.�'�',, %v'''+k'' `,�'�"Y� '� J , v4 Za '.v � '� t r � ;� 1. ^:. •��.� � .'.-, t/�t y,�( , wr ,,�\ +1.. % � .. ''4 ► :^:�:� �fN�'"s . . .� i � `�'�� 'R�l S� .1� '�k tr � r� y� . '� , � ',�'�r-✓� vr�r�?'�;'��'µ �j cd •.s ; �pj.'� ( , � e '/'` �.q�.� �..:-.:��.. .. �.,`� "J:�Y� �� .'.�r �.�b��' !,'_�t t _��,:. � .� �,�;��1 � f:'� � t,tivJ'e i.i,�.� � � � , q -� '� '�^. � � � ^� ...- —�w . '� `�. rA ' `��;� �+ :�. ��keµ.rf �:,p �; . r `G"""'"'' . . �.�1�. �' ��`�q� k ."� . . _ . . : >�FC ,a.hv��°��{y��R , ;f� a �. 1 .j,, , � ,' � AY ..;'I��r . . `1 �S' ��'R �,�' 1 � I � . ` � . .� � 4bl �� y� � � �..� ' S'.�> : .. �. , ��w.��.. j 'dri i �) M��f< �/ ' _ _ . .. rp,r�«X�r,� * /k '� �� 1�` ' r . ' . �'1 �Y.� y��`p�'R ��1� y . - . . .�' .',�.1`�� r � � ' .., .��.�' �.� C� �.,^�'�.:.��y,-"�E�„�� :�� `�„ .i�"�'.��^SM.{i �'a•.",� � .. . ,� ��':t .��l��•�,nll .vt j'�� i�' ��ir��'1 �t?� _J . � f V .i � � �,�0•.� ! k ."S �ki q�� d'�,� �� r.fGa ��!� �� ' � i ,�� «� �� '�: , .. , � l ,`' �` `.s' �� .,�r �h� ..I I � "�r' j'�,' �''1 1'' v�i/�F f ; '�-. . r�,�pqr�< r x` �yi�t"y>�'' >�,,�'.��r� {,'��J�.�y,1j � �----~� t:�� r/� � ,�; � l. I�4i .?� 'll�,' '�' � T`'�.'c��:�'��= f�'.f�t `v�;,'� ��`�1'!1+'3�¢'w�'I�� Ir' �S'�� p � � �F,;M� gp., br7E� � r r �J �� ' �� .Y � y� 1 . � .r� a1 ar� '�iz�. t �� y�r� r s� ��.' � 5 x q�''�i1 �� „ r� �ti t i , ,�r -- � �/ i �y I��.�y a..�y�iNi ��'�;�:ia sA�� a��'1�'��oH � '"+ -'.��i ''��_�i� .n��'i'��l�l' 1�� +Y � �+�J � ,4p .Y r�� t� "J � .t. � +' � 1.�� . 1r - � G '' �'` v �� "� �, � �' °•��i�a4r�v.� it� �!�, "v�i M Y1i� `(f�' � . 1 i r .� � . �.:� � ,� t ��` � .':`�'?' r` .. 'Y ;�t�•�(r�+ �,n i�` � ✓" �� 6� �,�.• i �1 �'� Y ' r.�' , /��' � 'f� y i ,� : �� '� � '� � ��v.�$i"'�►+�e' �� .� p : ;ti, .t,. � �! �`S � ?+ 1 �lS�{�Y��;� .l1;± ��1 r � �, . r . ,�y�"3.., . .�,�e'�t �i C �. y"�Q' Y�� 7�, � �� n,� ' �� 4(y'( .` R_ �:' ., wf y,�'.: ' � i �N, . "�i �� 'f�Y.. � + �;" �_ .6 x�i{�1�l�F ��-Y ru c � ��",1 r,!- ;'s•s ...w 1�p �1 a�F,�. .,.t ��1�:, � .e:'� '�'E,e � '� -•v--=�� 4'� �d i ..� �r7�j ,�C1"�y � � O L ' �y ^ � . ' ` , i vp "�x �iF• i „ �� .�, `�rr�Ft,f1��,Mrd�. � t . � �,��,�4.�7 � �•Lf� .�R� �;�� -� P� ,�j� ` �J�, �� Z,,•��y •�,.�� ., .. M��.;. ,�A{ ��t. i .' '�,y,57,.�ie•',..� � '. . .. �"1 a� �;r�1�I• '*�ilr,��rY� ��:.'Ml�� .� y ,� �' . . � `y r.�,4 hs, \� �= M � �� a',` ..�� v r s r i�' �` f'�.�j k J !"'i � i �frr �L ya.��:a O a � � rf i�1�� ' � ��t .a L � y �„�,� -"i!*", s� .�* � ',�'f� t"��' .�'1 O „'�, _ .., c.-�,""'.��°+ � �� ti�,��}`` -x ��, �.�. � . rE� �F , s s�e.� .1��'�'_" R /a �., vy» 1.�`�` ,� �+ -,'�t i ,�, � ,�,n7` ,,t. "�'�"j �`'''�,� +�� ',airii �� .L' 7< �.''7 +��,/i, ' s'e.r•i,��jti �� . � �J l`4,�'...��' F��j ir"de f��i. ��Yk� ��\�� .i�� L ` ,y �y,, t l�r R t�� a`f'�" �d'� � pJf ��!� ..r-�. f ��tf~{ i� � ��/jV� , I�� M1,�IL�'.�W��I �. � '. �� ._ '�' t ? .. �� J� • '� � : f '4=. ''*�`�� f � �� f��I�.� .�t�� K�� r�.y.4� � �1,��. ��''.v,, i�• �1�7,, '��'� . ! / i,,�r.y �e♦ S� X�4 .k�.��4�. , N ��'S-:. �� . -. .:i�. . d�� Y+ � r,,�. �Z� �\� ^3 �y r e • 7 � ((�� ,�+ �� . .. .,r6(4 r*., �`��::y a^ �" � 7►�'�r �r � � �"�"' c-*. :.yl},d� '°rf !� � i �t �,: ��';i� � f ��,r� �. ` � ��'� �' �,. bi R .. ,� � ,��.y�l�I�u Cn M -" � - .", �T�l� �� .��,��t :-�� '1��,r� � /!',4�.�s�f � 4 �� 1.�..t. V 1 �j •.'r yi,} �..G ..+ h i��l t ' Fa�!��`�'.`f��'r/�� '�~�S'.X�'� � ''a' �.:.a�� ' � . � "` 1 .1{��j� �;�� Y`,o r��1i�'� �,�►W. --t' � � �r� t ' '�r. .� �� . .'rs� ��- A, k ,•�� „s�' �� ,. .. • a �.;t��` ,� j�"�J �_ r 4�i' 1'7 :►a�`" ' c � � � ;�.�.. p ��i/j' ^" � t �,it)��, y�I�it:�,^e,� ,��`�, �'v ? "f. •� , . �.il��,�' :,r� ��A�A\' O i, /! ti�1 N /! �� , �� r Y �lt�� `R,�y,r'��'µ��.' C, � •z ` �T �M�`a� 3 � � �� 1 „�.`�,..M1 ,/�l(`'� �1. �,�`�� . 4..•.!"�'�' ,��.�i. � \ r .� �s'�+�'� � ,•�� ..t�� < _ i . �II�K��`. � � .. •.r�na,c ..�.w.di.'�'6��Nd�S_..a. _.. r..�R��.Nr W�L4 G-'+ � �' ��'� r�' �'d�� Q�+' t � �� . �! ` �� + � �°� '��■ �� A � � "y�, X. y�� '�" � .��r..� h ,�'�+.�, "i�...� � u p�� .� �ti` � � ♦ '�� .-� � . �!`� �w�* �� .+ K �fGi ��.l.�� a�.1Anr�p" +^�r�'� �T��c� �r ,1. �f '� .� �{ � .� � ��J. ' �. �4`' � \�P'`�� bl�r� � ��Y��•�`�` U t ^e�� t. �, � � � .��'��1��JY{y� �c� �., y,,, ri'{i i:`fe.t 1, ��+� � , 7� ��ti� t a 1 � ��{'T � �3. � � ��y,t1�''i App�. *. �4t I,�pr ! '; �� ;i'(y,J. �� Q„i „c, 41 r"'�..,� \i � �q�'�', �`V r „1.�5: �il� t�y �r�{ � � R,' f � ,y�„ ��{ � �..y':.s,`* ., i,�+ ��'"�+i �� d�' �t�f�j�', 1 .,Y !��,("�` � .-� � � !,� 3� � j�yw'�#,, � � �.+]++✓� !l �..f�T f � .}y'� � �r R n � ��.i�'��+ I�� A ��' '�'� ��.y � �� "r+^' r � . r �'"� , � ,, ;U �`��, r��/ �4 � A �` �� ' , � ,� � �& Y ,t� ,�+� �;r �1�'� `.,1� �`� _� �y �a "�i � �r N '7'��''i '�'.� \''a'�-t�� r�,: !i �' i.A *4 � ��-- i I1 i `� •"� � ..,� '•�� '�,, 'i � � � . ;' . , �5 �:'. � �� , x �- x �-.� � . �� .z �.f �} �:�.f' * I 5, e+� � `� "7' �. *�,t.�t�''p��..�„/e�f�� 1n� � ; .� _ � ,� ��'C yw��r�" �a, �y r d'j�""��y!'{f�- .L�- T> ��`�� t - . :, j, i ,�. � r .c-�`�.!��, � .l?�-r . � V\ ! ,"'� U _ y �� '� _ � -J'� .Y �.:�1!" ,� `! _ n:•. - '",6. .�� r'�w.w �1..:6,�.� � f\ A f .j -t"+ e "; A,�' � ��t,�� 1� �,'� �,� S 'oP � ` � ` �r'' ~ f �y� �. ��x"`i��;��P ��, ,��., � ``� �, . ��"�.� � � ` j � � - 'Sa '! t�i � ��v,��,, ��.,, � ` � „r y� ++�pi�'^ 1 s. � � t,i�C�� .c'^ M�� . '�'� °�,,1�1.),' � �.,'�ij;� '�+u,�.,�. ••� -t��...r�� •. .'��i .t,�'r U �!��t��f� ' fa r1sY� . J r��y �' �q: L: V' �r `G� r ; �� ':�,''�"S�i► -!3 4C.�/;a� y(aA � �� ''A ,� ��;�� .-;,T s�� ''"�A v�'S'i � �.` �.�t',� �7; !3`�r� ""'�.r�`5'.��i'�d' ��'�� '�M',�� '�� „_E.,� ¢�:� � ')� ��T�� ,. � c.� �,�' ' '! `' ✓ j '` .�� [•-•* ,.r., � .,M "h�Lr�^�`.`� � �/' �'�rf `�„P'��` � � � .'.s sy�vy�; � 4 .�.:. � s� t'J' a �,i�' R. , dA �'*,��:. .q: I�,,�� c� � ��1 �a ,�� r �f�y.� ��;,�+,��.:l�a* ;� ,.+ v� �� k - �!/ � ��y � �� r �.� ��y�� Q � F {r�r��t�' '-�Y+�Yw ��'�°"�`�' Vi.« - �,P �' �-�+ ( �Ft. r1 ❑ w " u°� �. q •� cCS Ye i r. �� '�':' �;f�* , �-, ;�, " � � � �,— ,,�, , ;�,, �'_ " a� . '� 4/7 ��.�y� ,/ � ��n1 rfr`,� � . � � ,, �',,,'�y�,,l„ ��.� � > ��1��i{ :' 4 � #� �: �r 'L�f""'�.r ��i. . .`:" !M&'xTf�4 �� . � � � ► y �' „y„ < y`�`' '.. .sK+�:'t,� ,.;,i' 1 C� y) A, � �Il��y,� s � � f�� F,\.�� ` ''" ' � M O °`q ` �� ( ' $+�b i� '��t�i�i� �'�A'�+ � � � > �y ,� �,"� s.t�i�_"��,,. !�� Q � tt � :.�� '`� y�� W�p� � � ,� - ,�y, � � �+� �1y.9��i�` pW7'��• ...`F'rf��,/��:.ylP��"r"�. ^ .. GF�.. � ^s'F,'I��4k'�P : .� � .�4ciK`��.�_^I.^:��•��'�^�°�,r'!�.,..��.��:�r�A. �4 -i��. .`I ��'w:,.�i«.a� ��a 4� i�� 5,��, . � HUITT-ZOLLARS.INC. • 814E.Pike Street • Se�:tle'f!A 98122-3393 . 2�0?24 55CO oho-e • 2�5??8 1890 fax . -�,I�-ml'ars cor� �� APPENDIX B: � RUNOFF CALCUL�TIO.�S , �:�,�so93zoi��.wona��ana Esc�<<5 0�.��ri�riR DRAFT 4/9/2018 Wonderland Estates 2-Year BOSS International StormNET� - Version 4.19.0 (Build 16362) -------------------------------------------------------------- :r*#**x.*..:.:r*.: Analysis Options ...**:..:+*:r**:,r Flow Units ... ............ . cfs Subbasin Hydrograph Metho3. SCS TR-55 Time of Concentration...... SCS TR-55 Pond Exfiltration... ....... Constant rate, free surface area Starting Date ...... ....... EEB-09-2009 00:00:00 Ending Date ........... .... FEB-10-2009 00:00:00 Report Time Step .. .... .... 00:05:00 *Y:ttf*Y*****4 Element Count .:��:x��.::� Number of rain gages ...... 1 Number of subbasins .... ... 1 Number of nodes . ..... ..... 1 Number of links . ... ....... 0 :+.*.+.:_>***:.+ Raingage Summary rr.:t+.*+.***#*xr Gage Data Data Interval ID Source Type hours ------------------------------------------------------------ Gage-1 TS-2 INTENS�TY 0.10 •,r*:,r*�**...�*.:. Subbasin Summary .:.�:x.*<..:.:.� Subbasin Total Area ID acres ------------------------------ Sub-1 ":'_.19 :��:.:r::*<�+ Node Sum[r.ary ,.*.:*��:�... Node Elemen: Invert Maximum Poaded External ID Type Elevation Elev. Area Inflow ft ft ft� -------------------------------------------------------------------—---- Out-9 OUTFALL 97.50 97.SC G. lr� ,t*+r*+:+xr*,r#�.**r*,t+*++x*+ VOluiil2 D2[�th Runoff Quantity Continuity acre-ft inches �.*:c.*++..#.:�.:+x.:*t.**. --------- ------- Total Precipitation ...... 2.024 1.992 Surface Runoff ... ........ 0.065 0.00� Continuity Error (�) ..... 0.000 :t+�,r*:t::r::*ff+x*,t:�,t+x*+:t* VOlUIR2 VOlui'l? Flow Routing Continuity acre-ft Mgallcns *.***++*:.*x*+.*++*•..*.�* --------- --------- External Inflow .......... 0.000 0.000 External Outflow ... ...... 0.662 0.216 Initial Stored Volume .... 0.000 0.000 Final Stored Volume ... .. . 0.��0 �.00C Continu=ty Error !°; . . . . . -�.�:5 StormNET Page 1 Wonderland Estates 2-Year ***.***.,*��„*.,,,..,,.*.,.,*...***..#,** Composite Curve Number Computations Report ***++**::r*«�:r�:+*�.+t*x*..•>*:.*<*+**+*,r* -------------- Subbasin Sub-1 -------------- Area Soil Soil/Surface Description (acres) Group CN ---------------------------------------------------------------------------------------- Paved parking � roofs 6.58 B 98.00 Woods, Good 1.30 C 70.00 > 75� grass cover, Good 9.31 B 61.00 Composite Area & Weighted CN 12.19 81.93 +.:�<.*.�,�*.*«...#.*..+*.�.�:...+*�*�#*#.*:+..�x+�� SCS TR-55 Time of Concentration Computations Report ::•x*...•��**.**�«**+r.:.*.*:.,c.+*+.*.*<*t�**.**+*,r Sheet Flow Equation ------------------- Tc = ;0.007 * i (n * L�)^0.3)1 / ({P^�.51 * ;Sf^0.4) ) Where: Tc = Time of Concentration (hrs) n = Manning's Roughness Lf = Flow Length ;ft) P = 2 yr, 24 hr Rainfall (inches) Sf = Slope (ft/ft) Shallow Concentrated Flow Equation ---------------------------------- V = 16.1345 * (Sf^0.5) ;unpaved slrface; V = 2�.328= * (S'^0.5) ;pav�� ssr`_acej Tc = fL� / V) / ;3600 sec/hr) Where: Tc = Time of Cor.centrat'or i:�rs1 Lf = Elow Length (ft) V = Velocity (ft/se��i Sf = Slope !f_itt; Channel Flow Equati^z --------------------- V = (1.49 ` iR.^i?/3i ; * ;S�^G.�; 1 i c R = Aa / ?1� Tc = (�f / .�i .' ;35�0 �.,c�'h-: Where: Tc = Tis,e o� Concentraticr (:�rs: Lf = rlow Length (ft) R = Hydraulic Radius (ft'r Aq = Flow Area (ft�) Wp = Wetted Perimeter (fr; V = Velocity (ft/sec) Sf = Slooe ff�/fti n = h:acnin�'� R.��cqF�ess ------------- Subbasin Sub-1 -------------- Sheet =1ow Cc:r.putat'_cns StormNET Page 2 � � Wonderland Estates 2-Year �...area .. Sib3-ea 6 3��ar?a � Mar.zir.g's R.o��nr.ess: �.iJ u.:;,, O.J�� Flow Length (ft; : SO.CO 0.00 O.uO Slope (�) : 3.00 0.00 O.OG 2 yr, 29 hr Rainfall (in) : 2.00 0.00 O.�C Velocity (ft/sec) : 0.=9 0.00 �.u� Computed Flow Time (minutesl : 9.3':' �.CO �.C;; Shallow Concentrated Flow Computations -------------------------------------- SLr,ar2a A Ssbarea 6 �ubarea C Flow Length (ft) : 200.00 0.00 0.�0 Slope (�) : 0.50 0.00 O.JO Surface Type: Paved Unpaved Unpave� Velocity (ft/sec) : '_.44 0.�0 0.00 Computed Flow Tis.e (nir.it2s; : _'.3�' 0,�� :.u0 Channel Flow Computations ------------------------- Suba_ea A SL�area 3 Ssbarea C Manning's Roughness: 0.01 �.00 O.C� Flow Length (ft) : 1000.00 0.00 0.�� Slope (�) : 0.50 0.00 0.�0 Cross Section Area (ft2) : 1.00 0.00 0.�0 Wetted Perimeter (ft} : 4.00 0.00 0.�0 Velocity (ft/sec) : 2.79 0.00 O.�Ju Computed Flow Time (minutes) : 5.98 0.00 O.00 ------------------------------------------------------------------------ Total TOC (minutes) : 12.67 +.+.*..*<+**_+...*�.*�� Su�basin Runof: Summary +.+�+.+..+.�.�..+�..�:. -------------------------------------------------------------------------- Subbasin Total Total Peak weighted '"ime o' ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss -------------------------------------------------------------------------- Sub-1 2.000 0.646 1.440 81.93C 0 00:12:9C -------------------------------------------------------------------------- System 2.000 0.646 1.99 ��. 1 , •��, ' I _ . . , , � Analysis begun on: Thu Apr OB 16:49:59 2010 , � �, ! �' '' i� � �� ;., � Analysis ended on: Thu Apr 08 16:49:59 2010 Total elapsed time: < 1 sec j , � � { , StormNET Page 3 Wonderland Estates 10-Year BOSS International StormNETO - Version 4.19.0 (Build 16362) -------------------------------------------------------------- ,�:+�..*�<..**#:.,� Analysis Options �:r*..*+�::*,r�#+*,� Flow Units ............... . cfs Subbasin Hydrograph Method. S�S TR-5� Time of Concentration...... SCS TR-55 Pond Exfiltration... ....... Constant rate, free surface area Starting Date ...... ... .... FEB-09-2009 00:00:00 Ending Date . ....... ... .. .. FEB-10-2009 00:00:00 Report Time Step ...... .. .. 00:05:00 �*.:*:.**::.: Element Count .*++,r*:.*.:,�. ^Ju;nber of rain gages .. .... 1 `;u:nber of subbasins .. ..... 1 `:�:1::er of nodes ... ... ..... 1 `:�:ti�er of links ...... ..... 0 _.....**..:....+ P.aingage Summary .�.,r+��:*.+:r+�.:+ �age Data Data Interval _D Source Type hours ------------------------------------------------------------ Gaqe-: TS-10 INTENSITY 0.10 t.t...*.++***:x* 3�Sbbasin Summary � ...,�+:r*.++#*■.,r• II Ssbbasin Total ' Area I� acres , ------------------------------ Sub-1 =�.19 +rk#f**f**t*! �. ?•i�de Summary _�.:*::.*:.. vode Element Invert Maximum Ponded External =D Type Elevation Elev. Area Inflow ft ft ftz ------------------------------------------------------------------------------ 0�1�-9 OUTFALL 97.50 97.50 O.00 .+++.+++r+�++rr�::**:r*:+*+*+ VO1llIR2 Depth Runoff Quantity Continuity acre-ft inches ..+,r.+*::.**,�.t�:+.::.*.*+ --------- ------- Total Precipitation ... ... 2.684 2.839 Surface Runoff .. ... ... ... 0.127 �.004 Continuity Error ;�) .. .. . -O.00O *******************�****** Volume Volume Flow Routing Continuity acre-ft Mgallons t,r..++,�.:.*...+.....+...*:: --------- --------- External Inflow ... ....... 0.000 0.000 External Outflow .. ....... 1.285 0.419 Initial Stored Volume .... 0.000 0.000 Final Stored Volume .. .. .. 0.000 0.000 Continuity Error (�) . . ... -0.014 StormNET Page 1 Wonderland Estates 10-Year .*.*�..**<...,.,,##*�.,�,*.,x,..,,.*..,,.# Composite Curve NLr�er ��s.p��a'_icns R.e�or� x,r++f+xx,t,r�,r��.«..+.x+�r++:t-.��.x«�-..:+:__ -------------- Subbasin Sub-1 -------------- Area Soil Soil/Surface Description (acres) Group CN ---------------------------------------------------------------------------------------- Paved parking & roofs 6.58 B 98.00 �Aoods, Good 1.30 C 70.00 > 75$ grass cover, Good 4.31 B 61.00 Composite Area 5 Weighted CN 12.19 81.93 .+xr#*r:��:*.:r*+.*,t***.*#:r....,�x>:r...*.***«i*#+**.:r sCS TR-55 Time of Concentration Computations Report ++*+**..*,r.*.**+:r:c.***+*<.+*+**<:r*.*.*+***.**#+**.* S:�eet Elow Equation ------------------- I'c = (C.OG7 * ( (n * Lf)^0.8)) / ( (P�0.5) * (Sf^0.4) 1 r7here: __ = Time of Concentration (hrs) r. = Manning's Roughness �� = Flow Length (�t) P = 2 yr, 24 hr Rainfall (inches) �_ = Slope (ft/ft) �:a==cw Ccr.centrated Flow Equation . = 16.1345 * (Sf^0.5} (unpaved sur�a,�e; � = 20.3282 * (Sf^0.5) (paved surfacei Tc = (Lf / V) / (3600 sec/hr) :•71 ere: .� = Time of Concentration (hrs; �f = Flow Length (ft) v = Velocity (ft/sec) Sf = Slope (ft/ft) Chanr,el Flow Equation --------------------- � _ (1.49 * (R^(2/3)) " (�- �= � � R = Aq / wp Tc = (Lf / v) / (3600 sec/:. where: Tc = Time of Concentration (hrsl ' Lf = Flow Length (ft) F. = Hydraulic Radius {'_. A� = Flow Area (ft2) 'r]o = Wetted Perimeter (-_ �� = Velocity (ft/sec) Sf = Slope (ft/ft) '� r. = Manning's Roughness -------------- �ubbasin Sub-1 -------------- 3heet 91cw Computa�ior.s StormNET Page 2 �' I Wonderland Estates 10-Year Subarea A Subarea B Subarea C Manninq's Rouqhness: 0.10 0.00 0.00 Flow Length (ft) : 50.00 0.00 0.00 Slope (�) : 3.00 0.00 0.00 2 yr, 29 hr Rainfall (in) : 2.00 0.00 0.00 Velocity (ft/sec) : 0.19 0.00 0.00 Computed Flow Time (minutes) : 4.38 0.00 0.00 i Shallow Concentrated F�ow Computations -------------------------------------- Subarea A Subarea B Subarea C Flow Length (ft) : 200.00 0.00 0.00 Slope (�) : 0.50 0.00 0.00 Surface Type: Paved Unpaved Unpaved Velocity (ft/sec) : 1.44 0.00 0.00 Computed Flow Time (minutes) : 2.32 0.00 0.00 i Channel Elow Computations Subarea A Subarea B Subarea C Manning's Roughness: 0.01 0.00 0.00 Flow Length (ft): 1000.00 0.00 0.00 Slope (�) : 0.50 0.00 0.00 Cross Section Area (ft�) : 1.00 0.00 0.00 � Wetted Perimeter (ft) : 4.00 0.00 0.00 Velocity (ft/sec) : 2.79 0.00 0.00 Computed Flow Time (minutes) : 5.98 0.00 0.00 Total TOC (minutes) : 12.67 rr+�:►.t.*.=..*.+.*#*.:. '� Subbasin Runoff Summary t#f#*fY#*t1r***#f**4**#* ' _____________��___________________________________��_-�_�� Subbasin Total Total Peak Weighted Time of ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss -------------------------------------------------------------------------- Sub-1 2.850 1.258 3.360 81.930 0 00:12:40 -------------------------------------------------------------------------- System 2.850 1.258 3.36 Analysis begun on: Thu Apr OB 16:51:32 2010 Analysis ended on: Thu Apr 08 16:51:33 2010 Total elapsed time: 00:00:01 � . StormNET Page 3 � Wonderland Estates 25-Year � B03S Int2_aati�aa= S=��:n`1�� - 'Jarsi�n _.=9.., iBcild �o"3c" ------------------------------------------------------------- t+*#.**..r***x.. Aaalysis Options �.*..**..**.*#:r: E1ow Units .. . ... . .. ....... cfs Sibbasin Hydrograph Method. SCS TR-55 Time of Concentration.. .... SCS TR-55 Pond Exfiltration... ....... Constant zate, free surface area Starting Date .. ... ...... .. FEB-09-2009 00:00:00 �nding Date ............. .. FEB-10-2009 00:00:00 ?eport Time Step .. .... .... 00:05:00 .�.**..*..... Element Count .+.:r.:::r*#:+. C•:umber of rain gages ...... 1 tiumber of subbasins .... ... 1 Nucnber of nodes ........... 1 Ivur,iber of links .. ......... 0 ...*,�:*#.+*.*,��> Raingage Summary .�.*+**:..*.:<.. Gage Data Data Interval ID Source Type hours ------------------------------------------------------------ Ga��e-1 TS-25 INTENSITY 0.10 +.�.,.**+*�***r** Subbasin Summary .�<+....**##<**,� Subbasin Total Area ID acres ------------------------------ Sub-1 12.19 .,..*+..*�... `:ode Summary ...*.+,r:..*„ 'dode Element Invert Maximum Ponded External ID Type Elevation Elev. Area Inflow ft ft ftz ------------------------------------------------------------------------------ o'1t-9 OOTFALL 97.50 97.50 0.00 �x*.**:+**�*��*::r**:r**�:r::r VOlUI[12 Depth :�unoff Quantity Continuity acre-ft inches .+*.*..��<«#+*#.�*.+**.:.* --------- ------- I'otal Precipitation .. .... 3.339 3.287 Surface Runoff ... ........ 0.163 0.005 �ontinuity Error (o) ... .. -0.000 r=:r*x**#x*�*,r.+x++*+:+r+:r,t VOIllIR2 VO1llIR@ F_ow Routing Continuity acre-ft Mgallons .�+*r�:�.,r:.t.<+**.**..*.*. --------- --------- External Inflow .......... 0.000 0.000 Lxternal Outflow ... ...... 1.650 0.538 Initial Stored Volume ... . 0.000 0.000 E'inal Stored Volume ..... . 0.000 0.000 Coat=auity �rror i=! .. .. . -0.0'9 StormNET Page 1 Wonderland Estates 25-Year **�**��,<.*,**..,..,*#*��*_�..�„�...�.�� Composite Curve Number Computations Report **+**..,r��*>*<..*.:�.*+*+,r�:r..*,�..x*.�.*** ------------- Subbasin Sub-1 -------------- Area Soil Soil/Surface Description �acres) Group CN ---------------------------------------------------------------------------------------- Paved parking s roofs 6.58 B 98.00 Woods, Good 1.30 C 70.00 > 75� grass cover, Good 4.31 B 61.00 Composite Area & Weighted CN 12.19 81.93 ..�:*..�*�*..*+**#:�.*+*.*.,r.+**�*.�.:.:«.....>:.: SCS TR-55 Time of Concentration Computations Report x*�+,r*.:r*�*+:r*,rrx*t�**+***:*++**+**r*x*�**..*+�::r*�. S:�eet Flow Equation T� _ (0.007 * ((n x Lf)^0.8)) / ((P^0.5) * (Sf^0.4)) J�here: T� = Time of Concentration (hrs) n = Manning's Roughness Lf = Flow Length (ft) _ = 2 yr, 29 hr Rainfall (inches) Sf = Slope (ft/ft) 3`�a11o� ��centrated Flow Equation � = 16.1345 '� (Sf^0.5) (unpaved surface) , = 20.3282 * (Sf^0.5) (paved surface) ._ _ (Lf / v) / (3600 sec/hr) i1:^e_e: __ = Time of Coecentration (hrs) �f = Flow Length (ft) � = Velocity (ft/sec) Sf = Slope (ft/ft) ��.a�r.�i ==cw Equation --------------------- `J = (1.99 * (R^(2/3)) * (Sf^0.5) ) / n F. = Aq / Wp __ _ (Lf / V) / (3600 sec/hr) 'r;_�ere: __ = Time of Concentration (hrs) �_ = Flow Length (ft) F. = Hydraulic Radius (ft) yq = Flow Area (ftz) 'r;� = Wetted Perimeter (ft) . = Velocity (ft/sec) _� = Slope (ft/ft) .. = Manning's Roughness -------------- subbasin Sub-1 ------------- Sr�et F1o�a Cocipctations ----------------- StormNET Page 2 Wonderland Estates 25-Year Ssba�ea A Subarea B S��area � I! ttanning's Roaghaess: 0.10 0.00 0.00 Flow Length {'�) : 50.00 0.00 0.00 �� Slope (�1 : 3.00 0.00 0.00 ; � yr, 29 hr Rainfall (in) : 2.00 0.00 0.00 , �;e_ocity ift/sec) : 0.19 0.00 0.00 ' Conouted Flow Time (minutes) : 9.38 0.00 0.00 ' Sna�low ��r:centrated F1ow Computations , Subarea A Subarea B Subarea C F_ow Length (ft) : 200.00 0.00 0.00 S=ooe (�) : 0.50 0.00 0.00 S�=face Type: Paved Unpaved Unpaved Velocity (ft/sec) : 1.94 0.00 0.00 ��mouted Flow Time (minutes) : 2.32 0.00 0.00 �taane- =:ow Computations ----------------------- Subarea A Subarea B Subarea C Kaaaing's Roughness: 0.01 0.00 0.00 , =-ow Length (ft) : 1000.00 0.00 0.00 S:ope (�) : 0.50 0.00 0.00 �=oss Section Area iftz) : 1.00 0.00 0.00 'rletted Perimeter (ft) : 4.00 0.00 0.00 velocity (ft/sec) : 2.79 0.00 0.00 Ccmputed Flow Time (minutes) : 5.98 0.00 0.00 _otal TO^ (m:nu=Psi : =_.F�? �sbbasir. �Lnof� Surr_na�y � «,,..+*.:+*.*:.�:..:��.. -------------------------------------------------------------------------- Subbasin Total Total Peak Weighted Time of ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss -------------------------------------------------------------------------- Sub-1 3.300 1.614 9.510 81.930 0 00:12:90 -------------------------------------------------------------------------- System 3.300 1.614 4.51 Analysis begun on: Thu Apr OB 16:52:43 2010 Analysis ended on: Thu Apr 08 16:52:44 2010 Total elapsed �ime: OO:O�:C1 StormNET Page 3 Wonderland Estates 100-Year EOSS International StormNET�J - Version 4.14.0 (Euild 16362) -------------------------------------------------------------- *:r+�+.*::r.�..**x. Analysis Options *+.+:..:+*�..:+�.. Flow Units ... .... ......... cfs Subbasin Hydrograph Method. SCS TR-55 Time of Concentration...... SCS TR-55 Pond Exfiltration..... ..... Constant rate, free surface area Starting Date .. . .......... FEB-09-2009 00:00:00 Ending Date . .... .......... cEB-10-2009 00:00:00 Report Time Step .. ........ 00:05:00 ......:...**# Element Count +,��fx+fx�f,tf+ I Number of rain gages ..... . 1 � Number of subbasins ....... 1 Number of nodes .... ... .... 1 Number of links ....... .... 0 ..:*++,�+**+#�+.#+ Raingage Summary f*![ff'RR**tt4*�Rt1 Gage Data Data Interval ID Source Type hours Gage-1 TS-100 INTENSZTY 0.10 i •*:+,r:+,r«.****+r , Subbasin Summary ', *<.+...*«#**#�.* � Subbasin Total Area ID acres ------------------------------ Sub-1 12.19 ::+,�:.._.*.. Node Summary .t.,�..t..*:. Node Element Invert Maximum Ponded External ID Type Elevation Elev. Area Inflow ft ft ft� Out-9 OUTFALL 97.50 97.50 0.00 � ::�r��+*..+*+:.:r*+xr*+r#+� VOlURl2 D2Pth Runoff Quantity Continuity acre-ft inches ' +#+.+++#++#*:*.+....#:..:+. --------- ------- Total Precipitation ...... 9.048 3.985 Surface Runoff . .......... 0.222 0.007 Continuity Error (�? ..... -0.000 � .+.,�.*,�..*.#+...++:....... VOlume VOlume Flow Routing Continuity acre-ft Mgallons ffflt*tb**t<:t*Rxf*#f*k#t*t ________� ��___�� External Inflow ... ...... . 0.000 0.000 External Outflow . ....... . 2.247 0.732 Initial Stored Volume .... 0.000 0.000 Final Stored Volume ... ... 0.000 0.000 Continuity Error (�1 . .... -0.019 StormNET Page 1 Wonderland Estates 100-Year „�.**.,,*�x„#...#....**.*,,.,,.,�,,,.�x� Composite Curve Number Computations Report j :....*..:r*:..*.+*..+:.*.•+*.*#�,r.,.::+�+*.: � Subbasin Sub-1 Area Soil Soil/Surface Description (acres) Group CN ---------------------------------------------------------------------------------------- Paved parking � roofs 6.58 8 98.00 Woods, Good 1.30 C 70.00 > 758 grass cover, Good 9.31 B 61.00 Composite Area & weighted CN 12.19 81.93 ef******i***tt*#ltkltY*<t***tr*#e*#*R*efr****#***#**t SCS TR-55 Time of Concentration Computations Report ##**f***#***t1'*fYif*ttit#****4*ff*t*'4f�ftf***rt**#**#�F Sheet Flow Equation ------------------- Tc = (0.007 * ( (n * Lf)^0.8)) / ((P^0.5) * (Sf^0.9) ) 'i Where: � Tc = Time of Concentration �hrs) n = Manning's Roughness Lf = Flow Length (ft) P = 2 yr, 24 hr Rainfall (inches) Sf = Slope (ft/ft) Shallow Concentrated Flow Equation ---------------------------------- V = 16.1345 * (Sf^0.5) (unpaved surface) V = 20.3282 * (Sf^0.5) (paved surface) Tc = (Lf / v) / ;3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Elow Lenqth (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) Channel F'low Equation --------------------- V = (1.49 * (R^(2/3)) * {Sf^0.5)) / n R = Aq / Wp Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) R = Hydraulic Radius (ft) Aq = Flow Area (ft2) Wp = Wetted Perimeter (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) n = Manning's Roughness -------------- Subbasin Sub-1 -------------- Sheet F1ow Computatioas ----------------------- StormNET Page 2 Wonderland Estates 100-Year Subarea A Subarea B Subarea C Manning's Rouqhness: 0.10 0.00 0.00 Flow Length (ft) : 50.00 0.00 0.00 Slope (�) : 3.00 0.00 0.00 2 yr, 24 hr Rainfall (in) : 2.00 0.00 0.00 Velocity ift/sec) : 0.19 0.00 0.00 Computed Flow Time (minutes) : 4.38 0.00 0.00 Shallow Concentrated Flow Computa�ions -------------------------------------- Subarea A Subarea B Subarea C Flow Length (ft) : 200.00 0.00 0.00 Slope (�) : 0.50 0.00 0.00 Surface Type: Paved Unpaved Unpaved Velocity (ft/sec) : 1.44 0.00 0.00 Computed Flow Time ;m_nu�es) : 2.32 0.00 0.00 Channel Flow Computations ------------------------- Subarea A Subarea B Subarea C Manning's Roughness: 0.01 0.00 0.00 F1ow Length (ft) : 1000.00 0.00 0.00 Slope (�) : 0.50 0.00 0.00 Cross Section Area (ft2) : 1.00 0.00 0.00 �Tetted Perimeter (ft) : 9.00 0.00 0.00 Velocity (ft/sec) : 2.79 0.00 0.00 Computed Flow Time (minutesl : 5.98 0.00 0.00 ---------------------------------- Total TOC (minutes) : 12.67 ..>..:r::�:r++#r�**.+*#.* Subbasin F.unoff Summary ..:+.�+�..�.#.**+:**x�* Subbasia Total Total Peak Nieighted Time of ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss ------------------------------------------------------------------------- Sub-1 4.000 2.197 6.400 81.930 0 00:12:40 -------------------------------------------------------------------------- System 4.000 2.197 6.90 Analysis begun on: Thu Apr 08 16:53:44 2010 Analysis ended on: Th�s Apr 08 16:53:94 2�_0 Totai e_apsed time: < 1 sec StormNET Page 3 HL�(TT-7�LLA�� HUITT-ZOLLP32S,INC. . 814 E.Pike Street • Sealtle,WA 98122-3893 • 206.324.5500 pho� • 206.328.1880 fax • huitt-mllars.cam APPENDIX C: CONVEYANCE CALCULATIONS ', I �:�,�so93aol�,wond��a�d Esrart��,o6��,.�pniT�R DRAFT 4/9/2016 Worksheet for Circular Pipe - P1-P2-P3 Project Desaiption Friction Methad Manrrng Formula Solve For ��scher9e Input Data Roughness Coeffident 0.013 Chamel Sbpe 0.01000 ft/ft Normal Depth 0.95 R Diameter �•� � Results . Discharge 3.83 R'!s �o,„area o.n t� Wetted Perimeter 2•69 ft Top Width 0.44 ft ��pep� 0.83 ft Percent Full �.0 96 Critiqi Slope 0.01125 ft/R Vebcity 4.97 ftls Velottity Head 0.38 ft �i Specific Energy 1.33 ft �I Froude Number �•� �I I�ximum Discharge 3.83 fN/s ' Discharge Ful! 3.56 it'/s Slope Full 0.01155 ft/R Flow Type SubCritical GVF lnput Data Downstr�m Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Average End Depth Over Rise 0•� 96 Nortnal Depth Over Rise 95.00 °k Downstream Vebcity Infinity ftls Upstream Vebdty tnfinity fUs BeMNY SYstems,Inc. Haestad Methods 9dudon GnNr B�ntlsY FbwMastx [08A1.068.001 11712010�23:<0 PM 27 Slemons Compeny Drire Sulb 200 W Wabarbown.CT 06795 USA +1-2ai-75S1666 Pays 7 of 2 Worksheet for Circular Pipe - P1-P2-P3 GVF Output Data Nortnal Depth 0.95 ft Critical Depth 0.83 ft Channel Slope 0.01000 ft/ft Critical Siope 0.01125 fUft � B��y Sysbms,ine. Fl�astad MNhods Soludon C��r BerMNy FlorrMaster (OB.O7.OG6.00J 1RI2010 2:23:10 PM 2T SNmons Comp�ny Drlve SWh 200 W WaM�.CT 06795 USA +7-203-755-7666 Paps 2 oi 2 Worksheet for Circular Pipe - P4 - PS Project Descxip6on Friction Mefhod Manning Formula Solve For Discharge If1pU��2 Roughness Coeffiaent 0.013 Channel Siope 0.00750 fUft Normal Depth 0.95 k pi�� 1.00 k Results p�,qq�� 3.32 fN/s Flow Ar� 0.77 ft= Wetted Perimeter 2.69 ft Top VYidth 0.44 ft Critical Depth 0.78 ft P�nt FuM 95,p % C��ppe 0.00956 ft/ft V��y 4.30 fUs Velodty H�d 0.29 ft Specific Energy 1.24 ft Froude Number 0.57 Mapmum Discharge 3.32 ft'ls Discherge Full 3.09 ft'/s Slope Full 0.00866 fUft ' Flow Type SubGi6cal GVF Input Data po�stream pepth 0.00 ft �� 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depm 0.00 ft Profile Description Profile Headbss 0.00 ft Average End Depth Over Rise 0.00 °/a Normal Depth Over Rise �.� % Downstream Veloary Infinity ft/s Upstream Velodty InflnKy ft/s - . s�►uer sne.�.,inc. �ud M.»wds soi�mor�ce�e�� Bantlay FlowMaabr [OS.01.066.001 7flI2010 71:44:22 AM 27 Siert�ons Campeiry Driw Sdte Z00 W WateRown,CT 06785 USA +1-203-7557668 Pape 1 0( 2 Worlcsheet for Circular Pipe - P4 -P5 GVF Output Data Nortnal Deplh 0•� ft Critipl Depih 0.78 ft Channel Slope 0.00750 ft/R Critiql Slope 0��6 � BeMley Systems,Inc. Ha�stad Mefhods Soluffon Cs�rter Bentlsy FlowMaster [08.01.066.00] 1f712010 11:44:Y1 AM 2T Siemona Company Drive Suite 200 W Watertorm,CT 08795 USA +1-203-755-1666 Page 2 of 2 H�(IT1�Z�JLL�Z� HUI7T-ZOLLARS,INC. • 814 E.Pike Street • Seattle.WA 98122-3893 • 206.324 5500 phone • 206 3281880 fax . huitt-zollars.com APPENDIX D: ALTERNATIVE DRAINAGE PROPOSAL J:�,I>093201��Wonderland Estates'�06'�ApriITIR ��FT��9�2�1� Denis Law — Ma or City �f; `ty �J Y � � �-� ,-'`M' r �-y.- U1 i �. ' � � � �. , ��' � f�'�; +�i�wi _ - �-�� Department of Community and Economic Development Alex Pietsch,Administrator April 2, 2010 p�� Il APR 0 5 2010 NUtrT It3ElKi�B Don Helling s�� Huitt-Zollers 814 E Pike Street Seattle, WA 98122 SUBJECT: "an Hold" Notice Wonderland Estates Utility Replacement, LUA10-008, ECF, CAR Dear Mr. Helling: Thank you for submitting the updated TIR as requested in the March 8, 2010 Hold Letter. After review of the new materials staff has identified some additional areas of concern as described below: 1. As proposed, a''�itional stormwater would be diverted from its currant drainage location of Madsen Creek into a new stream tributary identified in the provided TIR as "Stream A". Stream 'A' flows through the City's Ron Regis Park and eventually outfalls into the Cedar River. A Biological Impact Assessment Memo completed by the Watershed Company was provided in Appendix E of the TIR report. Within this Assessment, The Watershed Company indicates that no wetlands were observed along Stream A. The City believes this report is in error, because a wetland was identified in t�;� ar�a uur:r� th� C�d�r Ri�,rer Reg:ona! narn I'v14st�r Plu.^. rra��ss. T�� 4;.�r�ic^ e# additional stormwater, to this wetland, may have adverse impact to the wetland hydrology. The additional stormwater runoff could result in an increase in the wetland size and/or value affectively increasing its buffer size and/or area. If the wetland changes in size and/or value it would have adverse impacts on the Cedar River Regional Park Master Plan and anticipated improvements for Ron Regis Park. Furthermore, the City has received grant funding for Ron Regis Park from the Recrea#ion and Conservation Office (RCO) and the Federal Land and Water Conservation; these grant funds require that particular in�provements are made to the Park. Changes to the wetland or Stream `A' may impact the City's ability to comply with the grant funding requirements. 2. Additionally the City is working with potential FEMA funds to rehabilitate the Elliot Spawning channel that was damaged in the 2006 and 2009 Cedar River flooding events. The Elliot Spawning channel is located just downstream of point F of Stream 'A', as Renton City Hall • 1055 South Grady Way • Renton,Washington 98057 • rentoneva.gov Mr.Don Helling April 2,2010 � Page 2 of 3 identified in the TIA. Any increase in Stream flows may affect the City's access to the site during construction as well as potentially impact the spawning channel itself. In addition to the above concerns, the City Stormwater Division has questions and/or concerns about the provided TIA. The following is a list of issues identified by the Cit�s Stormwater Division: 1. The TIR states that discharging site runoff to the northwest corner of the site would alleviate flooding in Wonderland Estates and reduce some of the flooding potential in Lower Madsen Creek. The TIR does not quantify how much flooding would be reduced. It would seem that removing 3 cfs from the total tributary flow to Madsen Creek would have negligible improvement in the amount of on site flooding. 2. The St�rm��rater Div:sion is confused with �able 3.1 on pa�e 13. Under existing conditions for the 25-yr storm, Wonderland Estates contributes 4.52 CFS. Is this because the pumps do not have enough capacity to pump the on site runoff to Madsen Creek? What if the pumps were sized to discharge all the site runoff to Madsen Creek. What would be the amount of increased flooding that would occur at the northwest corner of the site? 3. Why is the proposed flow for the 25-yr event 3 cfs for Wonderland Estates in Table 3.1? One would think the proposed flow should be 4.52 cfs + 3.0 cfs or 7.52 cfs, which is the capacity of the conveyance system of the proposed discharge route. 4. The Stormwater Division doesn't understand how the existing water surface elevations for Stream A at points A, B, C, D, E and F are higher than the proposed , conditions. The proposal to divert additional flow to Stream `A' will add 3 cfs for the 25-yr event; therefore, the water surface elevations must increase correspondingly. Table 3.2 shows the 25-yr design flow of 10.33 cfs for existing conditions and 8.81 cfs for proposed conditions. How can this be when additional flow is being diverted to Stream 'A'? 5. The project does not trigger flow control because the proposed improvements will not result in an increase in impervious surface; however, because Stream 'A' is located in an area with erodible soils, any increase in flow could result in erosion and subsequent degradation of water quality. To eliminate this condition, the proposal to divert flows would require that Stream 'A' be placed in a pipe all the way to the Cedar River. Constructing a pipe through a wetland is not allowed per City code. Code would require that the pipe be placed in an alignment that avoids the wetland. Placing Stream 'A' in a pipe would change the hydrology of the wetland by reducing the volume of tributary runoff and would require an analysis determine any impacts and appropriate mitigation. Finally, constructing the pipe nea� a sensitive area would invofve federal, state and local permits. Mr.Don Helling April 2,2010 Page 3 of 3 Based on the above-identified technical issues and concerns the City requests that the applicant look at alternative drainage discharge locations that would not result in impacts to City Parks, grant funding, and spawning channel. At this time, your project has been placed "on hold" pending resolution of the drainage concerns and issues identified above. Please contact me at (425) 430-7314 if you have any questions or would like to schedule a meeting to discuss the identified project issues. Sincerely, , �� Vanessa Dolbee (Acting) Senior Planner Enclosure:Ron Regis Park Wetland Study and Delineation Maps cc: King County Housing Authority-Hugh Watkinson/Owner(s) ` Leslie Betlach,Parks Planning and Natural Resources Director Allen Quynn,Civil Engineer Arneta Henninger,Plan Reviewer . 1��, ��.�« P�K �. WETLAND STUDY CEDAR RlYER REGIQNAL PARK REN70N, WASH�NGTON Prep�red for: ', Jongejan•Gerrard�McNeal 23 't 0�rd Av�nue Northeas Believue, Washington 980t Prepared by: � The Watershed Company 10827 Northeast 68th Street, Suite B Kirk(and, Washingtvn 98033 January 12, 1993 lntroductivn The site af the proposed Gedar River Regional Paric is la:ated along the Maple Valley Highway (SR 169) east of dowtttown Renton, on the Cedar River between Maplewood Golf Course and Jones Road, Tpumship 23N, Range 5E, Section 22. A wedand study was completed for the property, inctuding delineation of a large wetland adjacent tc tt�e Cedar River. Methods Wetland delineation was preforrned �ccording to the 1989 Fadera( Manual for ldent�fying and Detineating Jurisdictional Wetlands. Vegetatian, soils, and hydro{ogy were examinad. In order to make a determination of the presence pf wetland, Indicators of hydrophytic vegetation, hydria soil� and wetland hydrology must be observed. Hydrophytic vegetation consists of a plant community in which more than 5�% of the dominant s�ecies have a wetland indicator status Re 1988 of facultative FAC tacultative wetland FAC or obli ate �BL . Soi1 calor ( ed, ) ( ), � W}� 9 � ) (r� hand dug test pits w�s used as an indicator of hydric soil. A chroma af one, ar of two in mottled soif, is considered indic8tive of hydric soif. Wetland hydrology is present when soil is ' saturated to the surface for at least one week during the growing season. , Resutts A single wetland was ideniffied on the site. The wettand boundary roughly paralle�s the Cedar Rhrer, dividing the site fnto upland on the south portion ot the property, and wetland on the narth pprtion. The wetland is forested, and includes a small beaver pond formed an Madsen Gre�k; this stream runs alang ths eastern property boundary. � Vegetatlen of the south part of the ske has been disturbed in the past, and r�aw c�nsists mainly of r�umps of blackberries along with grasses and ott'ter weedy plants. Species present inc{ude Himalayan and evergrean blackberry, Scot's broom, bull and Canada thistle, buckhorn plantain, clav�r, Watson's willow-herb, common tansy, and grasses such as orchard grass, quacfcgrass, and bentgrass. These species do not t�nstltute hydrophytic vegstation, as less ihan 50%of the dominant species have a wetland indicator status ot FAG, FAeW, a�OBL.. At the sau�ttiem prope;ty boundary, near the raiiroad rlght of way adjacer�t to Maple Valley Highway, some red alder trees form a line; a shrub thlcket cansisting of srtowberry and Pacific ninebark borders a dit�h next to the riqht of way. To the north, irt the vicini#y qf the wetland boundary, the dominar�t spe�ies include Himaiaya� blackberry, evergreen blacict�e�ry, so�# rush, reed c�dnarygrass, field horsetaii, bukushes, creeping butiercup, �nd grpund ivy. In the torested portion of the wet(and, a variety of plant specles are present. In the overstory, the dominant trees �re re� aldsr, bladc cottonwoad, bigleaf maple, and western red cedar; several trees are dying due to flooding caused by beavers. Pacif�c willow and Engllsh ho11y �re afso present. tlnderstory species inciude snowberry, salmenberry, nootka rose, ninebark, reed canarygrass, piggybaek, curly dock, but#ercup, and bulrushes. 8ecause more than 50°� oi these spgcies have an Indicator status of FAC, FACW, or OBL, thls plant community is considsred hydrophytic. 1 �� The on-site soiis have been mapped in the King County Soil Survey as Newberg silt lo�m, Puyallup fine sandy loam, and Ftiverwash. Of these so(Is, only Riverwash is considered hydric; the northem part of the site, along the Cetiar River, was mappe�d as Riverwash. Soll c�tors vary relafirefy little across the site. On the upland part of the site, the colors typic�liy found were clive brown (2.5 Y 4/3} and brown (t0 YR 4/3), primarity without motties. S�II calar within the we�and was generatly darlc grayish brown (2.5 Y 4/2� or very dark grayish brown (2.5 Y 3/2) with motties. These colors mest the criteri�n far hydric soil. Hvd,_raloav 8ecause field work was conducted in December, soils throughout the site were damp to saturated. Tha transition between darnp and saturated soils, moreover, was a fairly reliabls indicator of the we�and boundary. That Is, ai the iime of Qbservation, soil wlthtn the wetland was nearly all salurated, meeting the criterion tor wetiand hydrology. Pont�ed water was observed in many aress, ir�cluding a smalf beaver pond. Madsen Creek constitutes another hydrologic feature of the site. The stream was relxatetl onto the slte by King County Surface Water Management. In its current channel, ii enters the property at the southeast corner, follows the eastem property boundary, then f�ows through the wetlarxi ta tha Gedar River. The stream was no� field-#lagged, as there is no wetland fringe on the edges of the stream. ln addition, a small draina8e with wetland characteristks is present on the western property boundary. Thls drainage was delineated and fleld-flagged as wettand. The hydrolpgy of tlie area fs likely to be ohanging due to the actwity flf beavers. A dam has bean con�tructed on Madsen Creek, eraat�ng a small pond, and recent activity is evident. Because af the presence af beavers, the Iocation of the wetland boundsry may change in the future. ; S��y of Existinq Canditians 7he site of the proposed Cedar River Regiona! Park was scr�e�ned for ths presence of wetlands. A single wetiand was identified and field-fiaqged; this wetland encompasses most of the northern part of the slte, adjacent to the Cedar River. No other wetlands are present on the property. The vaiues of the delineated wetland include wildlife habitat, water quality, and flood corrtrot. Due to the proximity of the Cedar Rtver, the wetland is expected to play a significant role in attenuation of floods in #he area. lt also serves as a �tter tn improve waier qual',ty. Moreaver, the site has tremendous value for wildUie, particularly the northem portion of the site which Includes the foresteti weUand. With the combination of the presence of the rNer, mixed forest, shrub, open water (pond)� and grassland habitat, the site provides not only d'Nerse habitat types but a large amount of edge habitat Edges are important for wildlife as they support a parfioularly ci'nrarse plant community within a short distance. The site can be expected to support a variety ot bird species, including songbirds, ground birds, � woodpedcers, and raptors, as weil as srrsall mammals, deef, furbearers, r�ptiles, ar�d amphibians. �ird species observed include the blacic-capped chi�kades, American goldfir�ch, rufpus-sided towhae, song sparrow, Lincoln's sparrow, purple finch, variad thrush, golden- crornmed kinglet, ruby-crowned king{et, American robin, winter wren, Northern fi�cker, downy woodpecker, Calitomia quai�, �ed-taited hawk, sharp-shinned hawk, American kestrel, mallard, goldeneye, commpn menganser, and g�sat blue heron. Other wikitife detectad include the beaver, raccoon, and biack-tailed dser. Under the Rsnton Wet{ands Managemeni (�rdinance, th�wetland is cor�sidered a Category I wetland, due ta +ts size {approximatefy 21.5 acres} and the presence of three vegetation classes� one af which is open water. Because the wetlartd wi!! qe preserved as the sfte is develaped, wildlife will continue to use the wetland. Moreover, use of the property �s a parlc wfil enhance public access to the area, #hereby contributing to enjoyment oi the resource. 3 Tab1e I: Ptant Species pbserved �ommon Name S�ci�ntitic Nt�me lndicator Status Overetory/Treec:� red alde� Alnus �ub�a FA�C big leaf mapie Acer maorophy!!um FACU English hoi#y 11ex aquifali�m NL bleck cottonwood Popvlus trichoaarpa FAG Paclfic willow Sallx lasiandra FACW+ sltka willow Salix sit�hensis FACW west�m red cedar 7huja plic8t� FAC ShrubslVines: butterfly bush Buddleid davidii NL red osier dogwood Cotnus sfolorr/fera FA�CW ninebark Physocarpus capifatus FAC+ noatka rose Rosa n�if�na M Nimalayan blackberry Rubus discolor FACU- evergreen blaokberry Rubus Jacinaius FACU+ blackcap raspberry Rubus lsucodermis NL thimbieberry Rubus parviflorus FACU+ salmonberry Rubus specfabilis �AG trailing blackberry Rubus ursinus NL snowberty � SymAhorocarpus albus FAGU �roundcever quack�rass Agrapyron repenS FACU bentQrass Agrosfl�spp. FACW-FACU,NI lady fem Athyrrum flllx-femina FA�C bui� thistle Cfrsium vulgare FACU Canada thtstle C�rsium arvense FACU+ morning giary Convolvulus sepium NL S�otch broom Cytisus scop��ius ' NL orchard grass Dactylis glomerata FACU faxglove Digrtalis purpweum NL Watson's wylow herb Eplloblum watsonli QBI. field horsetail Equisetum arvense �AGWd sco�ring �ush Equisteum laevigatum FACW fes�ue Festu�spp. FAC,FACU large-lea( avens Geum macrophyllum FAC+ wild geranfum C�ersirium spp. FAU+ , ground hry Glec.�oma hederaaea FACU-f English ivy Hedera hallx NL St. Johr+'s wort Hyperic�m perforatum NL sott rush JunCus efft�sus FAGYV t�ad rttsh Juncus bufonlu� FACW+ d�.�dtweed Lemna mFnar OBL reed �anary grass Phalarl� �rundinacea FAICW Table I: Pl�nt Species 4bserved (cont.) cornmon plant�in Ptantego maJor FAC+ _ licorica fern Polypody spp. NL Japanese bamboo PolygoRum cuspidatum NI sword tern Polystichym munitum NL btsck�n �ern Pteridium aquil,num FACU Creeping buttercup Ranunculus repens �A�CW aurly dock A�rmex crlspus FA�;W smaN fruited bulrush SCirpus fiiCrocarpus OBL bittersweet nightshade Solanum dulcamara F�C . common tansy � Tanacehlm vulgare NL piggyback plant Tolmrea menziesii F�C white ctover Trifolium repens FACU cattail 7yphA l�tif0li� OeL stinging nettle Urtka d!olca FAC+ American brookJime Veronlca amerlcarra OBL vetch vicl�spp. N l Tabte rl: Soil Test Pits Soi,I Pit # Matrix Color Mottle Color },�ydrofoav Wetland Determination 1 1p YR 3I2 Ye5 DBtnp Np tfiifl) 2 1 Q YR 4/3 Pb Damp �b 3 �10 YR 413 �b Da►np rb 4 18 YR 4/3 Pb bam I�b p 5 10 YR 312 Yes Damp Yes .5 Y D t�b fi 2 3!3 No amp 7 1 Q YR 4/2 I�b Damp No 8 2.5 Y 4/3 Pb Demp No g 2.a Y 4/2 Yes Sa#urated Yes 1 p 10 YR 3/2 �b Damp No 1 1 i 0 YR 4/2 IV� Damp f�b 12 10 YR 4/3 YQs Damp f�b 1 3 10 YR 3t2 Pb D�mp No 1 d 10 YR 4/3 No Dainp rb 1 5 2.5 Y 4J2 5 YR 418 Nearly Satu�ated Yes i 6 2.5 Y 3/2 Yes Nearty Saturated Yes 1 7 2.5 Y 4I3 Yes Nearly Saturated Tr�nsttion 1 8 1� YR 4/3 t�b Damp �b 19 2.5 Y 4!3 rb Damp T�b 2 0 1 p YR 3/3 Pb Damp �b 21 2.5 Y 312 Yes Very Damp Yes 22 2.5 Y 4!3 Irb Very Damp Transition 2 3 2.5 Y 4/2 Yes Satu�ated Yes 2 4 5 Y 5/2 Yes Saturated Yes 2 5 2.5 Y 4/3 t�b Damp Pb 26 2.� Y 4/3 Yes Damp Transition 2 7 2.5 Y 413 Pb Damp t�b 2 8 2.5 Y 4/3 t�b Damp t�b 2 9 ' 2.5 Y 3/2 No Damp Trans�tion 3 0 i 0 YR 3/2 Yes Pa�ded Yes 3 1 2.5 Y 3/2 Yes Saturated Yes 32 1Q YR 3/2 1�b Darr� Tra�sition 3 3 2.5 Y 412 YaS �amp Yes 3 4 2.5 Y 4!3 NO Damp (�b 3 5 2.5 Y 4/3 [�b Damp f�b 3 6 2.5 Y 4!3 f�b Damp No 3 7 2.5 Y 3/3 Yes Damp t�b �� 3 8 10 YR 3/2 �b Damp Pb 3 9 2.5 Y 4!2 7.5 Y 4I6 Damp t�b 4 0 2.5 Y 4/3 !�b Datnp �b � � I �. � �, . . . - REF�RENCES Cowardin, Lewis M., Virginia Carter, Francis C. Golet, and Edward T. LaRoe. 1979. Classificatbn of Wetlands and Deepwater Habitats of the United States. U.S, Department of tt�e interior, Fish and Wildllfe Service. FYJS/OBS 79/31. 103 pages. Federal Irrlsragency Committee tor Wetfand Deiineatlon. 1989. Federal Manual for ldenttfying and Delineabing Jurisdctional Wetiands. U.S. Army Corps of Engineers, U.S. Environmenta� Protection Agency, U.S. �ish and Wild(ite Service, U.S.DA. 5oii Conservation Senrice. Washington, D.C. Cooperative technical publicstlon. 76 pp. plus appendces. Munselt Color. 199p. Munsell Soil Color Charts. Macbeth Division of Kollmorgen instruinents COrporation, Baftimore, Mary(and. Reed, Porter B., Jr. 1988. Nationa! List oi Plant Species That Occur in Wetiands: 1988, Washington. U.S. Department of the Interlor, Fish and Vdiidlife SeNice. NERC-88118.47. Soil Conservation Service. 1973. Sflit Survey, King County Area, Washington. U.S. D�partmertt ot Agrlcuiture. 100 pages. AREA T�fALS: / ��-=__�_`J -' �� I V�UAK KIVtK PROJECT SITE- 45 ACRES -� REGIONAL PARK i:� � YVETLAND- 2t5 ACRES /,� �---�. TOTAL BUFFER - 5.7 ACRES 1247,000 S.F.) � -�� . RENTON PARKS 3 RECREATION BUFFER AVERAGING - 37,000 S.F. \ JANUARY'1,1994 JOl:GCGwN•GLHIGRD•.YeNe•� �Q, .....0 .....�,'.�: ` �4 d . . . ►1 arO~ Q,� ,EXISTING WETLAND AREA QP " (FROM 90UNDARY T� RIYERI� '�T�� G�t' .� � / i, \ � PROPOSED � /' PEDESTRIAN� � BRIDGE , �•.�) r PROPOSED SOFT r� - � ��:'�. SURFACE PATH � ' \\ ..c.:._.,; .":"� , � EXISTING FOOTPATH �� - ^/ I .,..r.,,_,:,..... _ .._.�.,:..J..� --------•--.� FOR FISHING ACCESS -�-•- �- � `/' . �:jwy'•� , c.. _ _ . � . ` . . _ N:_... . �. . . . .�:- � ' . � . EXISTING _ EXISTING \ _ _ ;CHAPMAN. OPEN WATER � ;1�FE � TREE CANOPY _ ' • �ESTAT€ ; _ . . � _� � • '`'-' �� PROPOSED PICNIC � ._, .. ��,. --•----- -- ....._. .... ^-�-� ' SHELTER-35;X35' ' ' � '-'" - -� � i I � �^ EXISTING WETLAND BOUNDARY .:' .;�� 1 � WETLAND\ �� FENCE PROPOSED SOFT _ 1 ' J'��i � ��BUFFER � � � I � SURFACE PATH � - ` ;,�_ ��-� AVERAGING ` _ _�-�� , `` ' ".. . �� ; U i ' � �, �� ` . i �\ �``,c-:�� i ' ��` � � .. _ _ � EXISTING � / 100' WETLAND � i ' -- � '� � ' FENCE � , ' BUFFER ' ` � _ �� o.� _ . � . __ . - , . .:...; �' . � ..ROPOSE PAV.E P ' . � � OPOSED�PICNIC ... �' `� �� -�---------��--��--��-�- — �' SHELTER �� - ` . ••_'.•---'"- ' • �� •� • 35'x35"'---� . i ��4.",.�, STRUCTURE EASEMENT %�'�. • 50' ACCE55 // � � PHOPOSED PR OSED .-� �' ..� . � ! ,� , PEDESTRIAN M IN ENANCE � � �BRIDGE � --• 5 AGE �� . . "'� I . `•---.J � � -.PROPOSED 286' � �PflOPOSED 285' � . � PROPOSED .��. ' ' SOFTBALL ISOFTBALL � 5�� . •:�EXIST. �:' a . • F PLAY AREA �pp��OPOSED RESTROOM � �. CREEK 25' � �' - �- :- -SARN ¢ 50'x50' �CbNCESSION;SUPERVI OR � F�OUIPMENT STORAGE / �� ' BUFFER � II � W PUBL�SPHONE :' 3-'x40' - I II � '-- "O PROeOSED P OP SED �"' • . - — . • i• .�. . ' . �� . '. . . . ' lj.li�i�i .i.ii:i':�i '.I . SOCCER FIELD SOCCER FIELD - ,pR0 O E PA I G - 2 1 ' . 360'x225' 360'z225' �' TAL • 7 A C 6 B -- �� i'I';''I i��'��'!I�I I I�I 1 ' � / PROPOSED - - - - - - - -- ��' -, �� • ...._.:. .. . __ . . U T .: �-- . ---_ _ - --rEXISTING MONITORI - ------- 8 � , � ,� � N � ��I �y I I � '� � Z f + + �� o � ��/ �l 1 g �� I + + � I + i � �, � � g 1 „ i , �j� / � � i � � � ! � � r � � + ♦ � 1 l. � I/ / / � • ' I � � • /. / _�;�` � ' � rf I � 1 � r + , + f / { i � i ' i r �I I C � I �'" �_. �.%�� 1/ I I .. f � ! I I r ti • + � � � � i '�f + • !, I � + � � ! I � C� ��, ; / / � � a ; , , : �� + .�, � �� , � � ; �� ` �• /_ , , - , . : tt► • �'�/ �: ,/,� � .. �. ,. i . � �� I / . , , r ��. ` ' �I/' � , � F. . + � � / / � \ �/ I � , , � � � � � / � * �' Jt + it + f� I I ; � � / / * i ! �� ♦ � 1 i j � � f , ' ��/ / � � � � � %1! I + r ,� � � . �J�- ' , , , � ` - • ��/ � oa� - � /� ��1 d� I�/ / ' . � . '' 'y'b�. � ! y , � . I � PL"BLIC WORKS CO:�STRLCTIOI�? PERMIT II�TSPECTION/APPROVAL FEE CALCULATION WORKSHEET 50% I�SPECTION/APPROVAL FEES PER ORDII�A.�TCE?�O. 4345 PROJECT NAME: �/`�ondertand Estates Infrastructure Improvements .� l. Estimate the total cost of offsite and onsite improvements for water lines, sewer lines, stormwater facilities, and roadway improvements for your project. Enter estimated costs in items(A)through(D)below. (A) Water $ (B) Sewer $ (C) Stormwater $146,975.00 (Includes On-Site Pavement) (D) Roadway $ (Street,sidewalks,street lighting,etc.) (E) Total Improvements S 146,975.00 (A)+(B)+(C)+(D)=(E 2. Calculate 50%inspection/approval fee for total improvements,as follows: (F) 3%of First $150,000 of(E) �4,40925 (G) 2.5%of over$150,000 but $ less than$300,000 of(E) (H) 2%of over$300,000 of(E) S (I) Total 50%Inspection/Approval $ 4,409.25 Fee: (F)+(G)+(H)_(I) 3. Breakdo��n of 50%Inspection/Approval Fees is performed as follows: , (J) 50%Water Fee $ 401/343.90.00.02 ((A) 1 (E))x(I)_(J) (K) 50% Sewer Fee S 401!343.90.00.01 ��B) � �E))X�1)_�K) (L) 50% Stormwater Fee $4,409.25 401'343.90.00.03 ((C) 1 (E))x(I)_(L) (vI) 50%Roadway Fee: $ 000/343.20.00.00 ((D) 1 (E))x(I)_(M) 4. Check: Make sure(J)+(K)+(L)+(1�1)_(I) ��Di��ision.s'�De��elopser�Forn��Con�truction Yeimit Applic�tion-doc Re��i:ion[)ate- June 12,'(107 1ob No. 15093201 woN�DE �RLAND ESTATES HUITT-ZOLLARS INFRASTRUCTURE IMPROVEMENTS Design Development ITEl�1 DESCRIPTION � UVI i U�IT n0. ; QTY' � T PRICE COST ANVOTATIOnS � 3 ;STORIOi DRAINAGE SYSTEMS Quarry Spalls 2; TON I 50.00 100.00 for"duck pond"overflow. — ------------- ---+---+------------------ ------------------------------ CPEP 8"Diameter 300'. LF ' 16.10 4,830.00 Per King County 2008 Bond Quantities Work Sheet -- - -- - - -- - - - - ---- ------ - _ - - __---- --- - -- - ------- ------- - ;CPEP 12"Diameter 2,350 LF 20J0 48,645.00 Per King County 2008 Bond Quantities Work Sheet -- - - . --- -- - --- -- - � _ --- _.. _ - - - — -- - ----- -- - Inlet Catch Basin 5 EA 1,260 00 � 6,300.00 Estimated as Type 1 mtch basm _ __ _ _ __ . ___ � .__ ; _ _ ___ -- _.___ ._-- Tvpe 1 Catch Basin _ 19' EA 1,260 00 23 940.00 Per King Counry 2008 Bond Quantities Work Sheet ------ ------ --------------- �----- ---- __..._._ ------ ----- ------ ------ ----- ----------------------- Type 2 Catch Basin,48" 4; EA : 3,350.00 13,400.00 Per King County 2008 Bond Quantities Work Sheet(see note) --- - --- -- — -- — - -- -t --...-- - - - — - - — ---- ---- - ----- ----- ------- Pump Station 2; EA 20,000.00 ' 40,000.00 lncl.type 2 cb,control panel,pipng,fimngs,valves,etc. �Pond 1; EAYi 7,500.00 ? 7,500.00 Based on estimated$3/CF for 2,500 CF pond ----- ------ - --- ------- --- ----- --- ,- - --- ------ ----- ------ ------- - ----- -------- -------- Interceptor Trench 1001 LF : 22.60 2,260.00 Per King Counry 2008 Bond Quantities Work Sheet ----- - -- -------- -- -'-------- - -- - - ---- -- -- --- _ -- ------ SUBTOTAL 146,975 No[e: .411 prices inclale labor,equipment,materialc overhead and profit 48-inch Type 2 c�ch basin unit price is estimated for 7-ft deep strucaire. The unit price includes cost per foot for additional depth over 4 feet J,,;SG9i1G1 Nbndes/un,lEcr;res'C1 PROJDOCSGI_Co�rEsnrr,nrc�_`010.0610-rr,rronronsrpc�nvlr_rlse P3tC I of I Arneta J. Henninger I From: Allen Quynn Sent: Friday, April 30, 2010 4:27 PM To: Ameta J. Henninger Cc: Ronald Straka Subject: Wonderland Estates Drainage Review Arnie, I've reviewed the applicant's Technical Information Report dated April 9, 2010 and concur with its proposal to upgrade the existing pumps and discharge site runoff to its current location which is Madsen Creek. I further concur with the addition of an onsite storage pond to help mitigate on site flooding that occurs when Madsen Creek overflows and floods the northeast corner of the site. Allen Quynn, P.E. Project Manager City of Renton Surface Water Utility Engineer 425-430-7247 aquynn@rentonwa.�o� . � 7 L' " � =� 1 DEPARTMENT OF COMMUNITY p � ��0� �� AND ECONOMIC DEVELOPMENT � M E M O R �4 N D U IVI DATE: May 24, 2010 TO: Allen Q Leslie B. CC: Kayren K. Vanessa D. _ � n � FROM: Arneta x7298 {'` SUBJECT: WONDERLAND ESTATES Attached is the latest submittal on this project. Please review and let me know if you have any comments, corrections or concerns. Thank you! i:lmemo.doc FOR DISCUSSION ONLY L�GEND: a � ■ � • � • EXISTING ELECTRICAL TO BE ABANDONED � EXISTING TRANSFORMER ■ � � � ■ EXISTING ELECTRICAL TO REMAIN IN USE � EXISTING TRANSFORMER PRIMARY ELECTRICAL SYSTEM - SCHEMATIC LAYOUT �� P�OPOSED ELECTRtCAI ■ PROPOSED TRANSFORMER � .. . . - . � . . .. . - -..�� + .. �.. � � ,t�� Y� • . „F;� ?�. . ;". , ... . .`�-., ,y„t�._ .,`, �.l �.7. : _ , ; �'�-}4 , .:j. � ' �� . - � ' � .. a'• t� � r ' ur . . _. ,.. _. . . � � ,� e. �� * '4�`r `�'. yrtij,t 7► i 4..> . .� k .. �.l� s 4 �r. •, . . . � . _ �i :�tt. . Y :ti . _ : `�l . _,�:i� _ _ .��'�.•��t:.4.Y� '�i...�7�— . .. y� e✓" :� ,i�+,4p - '� . ' 'Y7�.�` � - Z r � � _ ', � �' �_, � _ - � � .. �� i _� ._ .:'�i . , ' � { � � t ' �` , ` _ - � � r' � .�+R'�� - �-: : � Y � S�► + � _ - �,.�� + r �` � �Y �; � �� ' � 4.� ` � � � . � ,�. - •t.. -..-- id'+: F � � ��• �� - 'ih'�w... 6 r � � � �_ � i " ""a "' � � a' ��y,. +; y � �� , '�; - . `.. G . � .. - 1;.� , • , 'Yr . �� . . + , = f`� `� �� } . �� . �� .�� .J � . ��ja �' � � � �1 w . � i� . . . ' . �. � ,i;�:� k� ��. �� ,�-�' ti � (. � • �� ,�-r 4 � � . _v•• - -s�: . �i ^ �,., �� .� �s .. - • '�"' - . . � : -�� 4 �.y ^• . O J -'�!` M' ,� ~ + � �L , - + .c ��:�'. t g�. ?�� `� � 8 ,: � ;,� �-• i f r � `� a � �j r '� S� �'�? � �� .� �*�a. � � `u ,, � � -'�; . • � � ,, �-� _ i .r- � �. � � . ��Y , , �., _ :� �, Q I �� '�t " F� - t ' W 9 � _ � �� #� �`� ��'� ��# .7.. : ` _ i;. � � 1� � ` � ' u.+ � ., 4�., �,�"-` t'� � .� , �a�t', �q1��c � � . . I�t . _ � . ' �r• :�" . � � L4� �� ._" i -�' - !�''� . F� � � f� , � � �"� '�' � ' � � Y � � � ` � i # � j "�... .. � H: : �"', f:�w � �=�s ��' �,;„�,' ,.; �"t, �" �'�,� ��..-. W � ' � , � . � + � � �s� 1 � � � _ s � . --- . _ � � �� - � �, g� � �� ; � � �� 1 R � t r �� V Y '.1 '. ��s � � '_ �z� r8, , i . 1 ,� �� l .a, �' � , : � � � r M `� �: ', I LX �. � � �, :r � `,.� il � • . ` �� - _I' K- '. �Y/Ir c._. ` `~'' � '�� ' •� � � � � � i � -;'� . r ' � � � �^�� ° � ��' y � ti`~i, # � _i ,• , 1 • -;�� '. .., �• � � '� ..��• - � � �' �� / � . � - � � . �� _ � = a,�,a�� , , � � , ��b� � i,. ;:.,.�' . _ - ._ �, � — 3 = �� ___ � I Y. , ;. �r �� o�s�o: ' . . .. 'x � , � . �I' `T y� ` . ,i : "� - 1 �''"�7`t., +�^i:� � T �- . . ' pFG(@ � '* \� �' � `� , ,. ^ �� `< - �""-y��t . - _ PRCU.M7.:150.�701 � '9� . � �. j� �.> . �. -_.. ._._ . ._ . .. ' .. . � . -"4.. . �. ,. . _ � ' . ,.Y . � _ . ..r " , .._ . � . � . '.. _ _�.� SMEF7 A� i � � , _ . , .,. . _ _ . - , . .. , -._:._ •- ..w: . _ . .. �. -.., _„�-. . .: LEGEND: � � ■��•■ IXISTING SEWER MAIN TO BE ABANDONED EXIST{NG MANHOLE TO BE ABANDONED ■ � � � ■ EXISTING �EWER MAIN TO REMAIN IN USE FO R DI SCUSSION ON LY � PFtOP0�E0 SEwER MNN O E��E TO REMAIN Ml USE SEWER SYSTEM - SCHEMATIC LAYOUT � PROPOSED MANHOLE . .- �t _ _ , . , �� , - : ,;4„j,. � ..y' �- . � �. . .. . . �., ' .. .. . . . ' . . " .` 'vi �k'. � h. t�,�•`��".�. i.'� � . Y : .. 'y� `�`• . . _ .'� , , � • �' . � . . . , � �.�' . '.�. ._ �+�tl:z .. . . -. _ . _ . � �� '��. � - � �� . �� . . � • �� - , � } ` i i. �.�t. .. � ...�;�..3'� . . .... -, .. . . � , .. .._. .. , �, - � s',� � � � � � � � • � � � � � � � � � � �� F .'j�y,v;fsi�M•� -��.�y: �, - r'^'""'.u" � � . : r .r.s ��,- �}.. � � 1 ' ��i� . - - �� •:,� � � • vl : ' ,. � ._ «,.�,.,sJ! ar...:..� ,,. . . 7 _ _ � -- • � �; i � y 1 . ` ... _ . :'i s ti. -. _� . , �� ,, . , ' � � '' - i y / .�..-� �:, � . � �; � � � , . , _ r s �. � , . � � ■ � � ,:_ , , - . �r '' a +�`. � ,�,.- ' �" " '� � ��Il, �s r� :s �. �, �_,d � z� . .._ � i �.s.��. -� fi� �' s : , .. � j , ' ,� ..� � -�"� ' �». - � ^ c� +;�.�• _ [ ;� L�:: � – +rys-+s-,e._ - _....... �-x'.- ". iy *M z- j�� . � ..1 y�,� 4 ' i � �� ' 'r � .r�i � � � � . .� � d� .. . .� � � , ` � �_ . � } �{ r;� �� !� � � a �� <�i � � � � � �+'�■ �� , , i'' ; � ' .M'• � � r 4 �� .. . C� ' - . 1�� . . i � _ r �� ` � �� - �� ` � �- � �. �� , '��a _�.. '3 ' � . ...:.. -.� .. ..� .�. �� . � ` , �y� G � ,. ' � � - ----- .. .. .. - �_�'< `� � I ..J + � �� . , a. ..�► Irs`'�, '� � � -_ . , . ..-�ij�;'_ � � � . ,. , f ' � � � 4� i � L ^ � � + ^� � � T � �� r � �� 1 ��y� � � /� �� • �� ■ W �"� - , � . y � � , .�� , � � ,.�, � � � -�r � t - � 'J�� - �••• � ,�1'` ��s'�=� Q '� :` .. �. �' -yk , _ , �MM� W � � �'-- � ,.... �,► , ,�-�' , ,- .^� 5 � �,�� _ � � �,,_ - •, - . � ' -� ��'� �;�� t'� � � �{�� 7 � ti ' y � . � 4 � ' ' j�' ,� ` 'a. ` 4 l� . + - � - W � �. r; � � � t .Y ��, � �� - y� T .. :�: � � � ..�.�3y ::;. ._._..__. �,,,r - - "'�,,,,�..._F� .:�„a�-�=---�� -- ` F ,�,M�� `" � � � �� ` ._� --. .�. � _ � �;,;�: .:� ,# �_. �•:��. �- _ - �V� � � Y � a ;' _'` � � � �` � �.�r � � ,� - 1 •� �,� � � � r � � � tY,�' - � 1 � f�"� � � - � � - - -- - ` -=. - -i -�- - - - - � - - «- - � � � � , .. � � . , . . . ; � .. %`�J, y � � ��1'� I .i a- ,- s �y� .°J' , � ■ � � � � � ` � �� .:..�: � . ' '. '""` °� I "�'` �� '� ,� t= .�w y�( � ,. a:�.. � i , � �, T � , t _ . 0_ � ��J � ,�.,_ ... .� " ? '�1��+ �'♦ �� Z . R f• , � : ,4��'�� V 1 � � � �� ` � � ♦ , - � � � �, ; � , � �.�,a,s� ; , �; � , _ - y ., . �y � . - �:�: �� - � �� ,..: ' +rrrre�_ . ,� . - oFsr�o- � r►`� ... °''a' nf...,�,�.;-- '�> ��-* ��•�' �.. •y- _ �•'- � ��-� .�r�; P .�- �. , 4 . . C1ECAffD. .� � �� ,� 's r �, t . , .. ,, ' ��~ ��: . � - N� - � ' � ,._ ... - _. , .. .. - �RW.MO.:I50.93TOr '-=i:i:., t��t R � ��. "" `�.,� � � ��T � � � �� .;,,. �� .- : �� _ SlrtEI' A� , , i , � _ ,�� _ � , . .... ,, _ t _ � l LEGEND: � � a �� EXISTING PRIVATE WATER MAIN TO BE ABANOONED � PROPOSED PRNATE WATER MAIN ■ � � � ■ EXISTIN� PRIVATE WATER MAIN TO REMAIN IN USE - 4 ��- - PROPOSED PUBUC WATER MAIN F 0 R D I S C U S S I 0 N 0 N LY ' ` ' ' Da�TiNG PUBLIC WATER MAIN TO REMAIN IN USE . ,� ��T WATER SY S T E M - S C H E M A T I C L A Y O U T � E�STING MASTER WATER METER � ,- _ . :.�.- ,� `r: �. :.t. , � .�_ � �... ` - ,-, ', s•�,;• .. -' ' � ..*.. � . . .,� . . ....t .. - . ' '�� . . ._ . �h � �'�`, � ' " �� r � ? � �� i ,� � • ' `�' .. � ,""�., �`... .�.�.r s ,v5.r .; , . _ �.t _ � . r '+'� ' .. . - . „ . . • -�i . . � � �_ r ��'�� ".-� ;,.;;.�y•�-__ _ . �� . ...Y'� ��''�j `� " :t J*,f��s , � :�� . � . «S . , . . .-.._ _.. . c� 1:.. a:� i�, ��' 0�74:1ati�/� t, '� ,` _..� � } t �� ' .,� �� '^ . � � � ' � ... , �=� . ' � �� ,, # , �v y , i � � , .� 1 . " ♦ � '►.rT� �'L = ' �/ �� J� � �i+�� a � � � � � � � �.�� • J� � � � � � � � � � � . � � ��., � � L � , � , . � ., � � � . -�' 1... _ ... � �y � � � � �.� ... . � . �� , . .` .t.., . . . � �:� .R� j�} ' � � , � � ' • , j � � �� 't� � � ;�,-,_-; : : � . _ , " � ' / �v � - . :. . . --4 ..,:A . � .�,`: , � ' : �r -y-° -• - _ , . ,. . > >' < . } - � �- . � .� , � �' : � a � �' % ,; � �, 1 � , � � �„ '� i � .Fy ''`�i�' � ��i � , , , �. ` . 1 � • � _ . , �► , . i.�.� ��" r.. , �� 4 +� ■ O �•. � � ' � i ;�; � ` ` f '''�,- �''�' I � ., � � � � • }� ..� � �� ,� �i � i+' a :�' �' � � .�� .� � � � � '� � .� � � � I . � � � � , . �, . . � r=� � , �. . ., •� > � „ - � ; _ �� ;�..� � ,.. � u,+ .r�-_ � � "�-� ` 7 ,' �. �� - •�• � �,_ �� _ _ - � 3 �' � � �. =,,,r �' � . ��-_.-*- , 1' - "+ � : � y o � , `� � • y . � � � r � � ! . � �� (• � � � � � ��i � � � �►� � � �ai�i " �� ; V �,�je� ` "' � � � , � � � , �, ,a #, . . ' � � � � � �- r �; �.S � W � � � �`°�T ,�. . .. , � � � � a � � � �— � � �� 4-,. k.�'v a �� .. . . . 7�i � ` �.. � � Y � j _ _ . .. �, �"4 �� .. � .. � ��, �� i� q ...q � � � 9y4 = -:f ��s _....:► � .. �. �'��.e � � �`? t � 1 � `� t. � � � � � ^� .. �. :. � [� 1. .. . .'�°c- . " � � r � � � �• � �� ' � � � �� . � � � � � � � � r � .� , r� ��,y �� R ^� ' � a . 1 r /�� ,�-�� `Yt �� .�1. .t lY �.+ . .L . : �y. . ♦.. ��-'. r4.' x •� ir ,� _"' .„, �' ,.. _ � k� � � ;k. , I„�� :_ , . ,. , v � ,-'_ < +'x �!'. ',' � ' . ` ' � .�. � �,.. ,s Q, ' ,.. >r,. > f `f ,� � �: �� '�, '+ i ' � �� +� i � � F. "`� . , •� t ... ,, , ...� _ . - �� : i . - LOOF.'I4'15'09 . � � ` .. .A}�� "�y t�• � . ;. ' ;�,:., ,,y.:�' :�F„ o�wwN .. `, � aEs�n: �� Y� � . ' � . . � . 7M. � .4�.� . ;Y .. .�,i GrtCKFO.� . � � � +,� '1 3, �• , � .. , ' . ' ' �� .. .S ' �':'� ,., . ��}�: -. . .��t FROJ.M7.:1l�A370/ �' F � . i� � �� ! t� � � � � � � � � � �� +�'� � � �� a � �� , �, 4 .e�. . �.�? r'- , '.; . �• � �=a �.�. , . ..�.:: �. ,: ^: f... - _ , : . � � , , _ ,. � �_' t � � � ' ; :a _ _ - ,� � � ��_ , � ,. ... , � ._, - . ,�« , � _ _ ..._ ;�� _. � �;� r. . � . . ,,. --- ,� ._ .__ �, _. �-- _ � . .. .. �.�9�.... .... ' _ � . �F4``' .. a! �� ,:�ti... ,... ....._..: �f ., �........ � �. .. . `'� ....... . 'Yry .. �,- -..,..� ............. „. , ...,....,.,. , . .....,, ti„� ..... .. ... .. .. _,.._ � -.,,... ...� ., .., ^�.� 1�• " ... .., ��;�.,,,, ' , ' :..1: ' ^-. •� A . .. � .. ��.� :.. .., ' $ .. / �. � ... ... .� (� . +�� , 4 .'_�-._'�.�.. 'Y. .. ;. I�r -_.,,,, sa,,��:.,„;� � , .__ y � -�..'�.... ... '.-_ "'- " � . �" �+�,.� ,�,� »,W _... �.,,e --•.. -� -,. �'��, --..�v�-.-_ �fc .. � ;;,y. ; �. '�,.,' .... '�"_ `h,-. . .:f � ._ .. �. _� -� 9g - '.-. —�N�s'3g .. `' _ ��,`�� ;.� 5g•''" �.. �` � s��EN ' N . � . : _ „ — _ Qfz A a , _. .,_ __,.. . ss,. .� .v e t ,� � . - � f �� . ,� �; _ �+� �� ' �� _ �:` � _�` �a� � , �: ti �- , , - . , , � ,*�;� A .w. G �-- � �� r ` • rr"�... v� r� l � � � �„ r•_, _i ,..+^� ' a � .r a, Y mt . '� A � �y a�n , _ � .. �. yt . � , � �- �� gg6 cF � `r � - "'Y'�'�� .1. .•ot, ._ ��p,. . � �,- ,�:: � � �0� •�• �O� � S• . ' r A � � (', ` ' �' . ix:u . . ., . _:.._.w / ��.M� � , r � � ' ,; ; � �� ♦ • , ... �q � ., . _. .� ,�� eRq`W�a ��/ / /A�/-�- �. � .... I (� ' � .:... �c^� {91. �Swj",g � . � r/ �•'�^�• ' ., � �. .�. �. , > t ! 1 , ' . � . � + . � 2 i : % �,�„~,�,.� -„� �� x � /^'�^� f ` r� �y.,,4y. w '� " '. ' I'y/ A J t'S2v� q r.3t I J � ':�.;y/„� � � , p Cj l �. �( � '� � � " � �.{ o r " ...f�..�` � �� / O ` i� , i i1 � �x xr� _ � 1 �r� ��(�pii%� � �� -. � ��% ` ��; �� r� �� / �'�'' � •• p7 S � �, � '�0 LF 1 Z � � l� ,, r � „�--� ;/ !'� ;'�� at � .:., ,� �3 � . ; � � .' /�� ... ` ... � . . . ' � � I fY �A� .� f �t , 7 j � .. � �� '� ��.��`�"`- � y� . =� , x(� '� � �+ '`�';+�,�^� ' J'S� � �'+ �' i �� ' ^�"' .. � ' (`� ; � ! : � �� ..,� � .� ; � �(/"� s "'�' � v.. / .l � . ` . ��;i "�,, . �' � ,� "` .�� r_� e � � '�l� �..tqx '.,. � � � .. r� �rst. �' ; ��^�..�� / ��,��.W�� ; '`� ��..' ��. 1 l�I ( �._. � � �x.. xa . � � 1r�', .� L� � ��' .. 1 t� � �x � G ,,,�;; 1 � r' � , �� , . � ,�'�. ,�, 1, ... �� °, � � , , �� 1 � <� a . �; �j '1 �/. � �. � j' � � � � � , . W �' �,` �� ' '� � y,� > _y , , T_ : : . , , � � , .� ' � � ; � l�1� . : �' � � , ,}' M �� 1 r � r/ � J, j� r xr � � rw.H Z J , ,� .;.�� ;- l ,, �� M . �1.� �� . � % � �� Arneta J. Henninger From: McHendry, James [jmchendry@Huitt-Zollars.com] Sent: Thursday, January 07, 2010 1:49 PM To: Arneta J. Henninger Cc: Helling, Don; Ly, Viet Subject: RE: WONDERLAND ESTATES �^lmerta, in respor�se to the email below, ��e are planning on submitting the Drainage Repor; fo� the 1�Nonderland EstaTes Infrastructure Improvements tomorrow (Friday, Jan. 08} at around 3:�0 PM. Could you advise on home many copies of the Drainage Reporf are needed to facilitate review? Your assistance is appreciated. Regards, James T. McHendry Planner Huitt-Zollars, Inc. 814 E. Pike Street Seattle. WA 98122 206.324.5500 From: Arneta J. Henninger [mailto:Ahenninger@Rentonwa.gov] Sent: Friday, December 11, 2009 12:11 PM To: McHendry, ]ames Subject: WONDERLAND ESTATES In order to review your proposal and answer your questions staff is going to need additional information. Provide a Level 1 Analysis for each of the proposed Alternatives. Evaluate which one is better and why. In a recent email you requested a Variance for a storage facility to hold 25 9�. The requirement for the storage facility is Core Requirement#4. Before staff could consider this you would need to prepare and submit the calculations for the 2 year 24hour duration design storm event. How much are the current pumps pumping? What is the size of the existing pumps? What is the design size for the new pump (the design is proposing to replace the 2 existing pumps with a single pump, did I understand that correctly?). The project needs to provide the conveyance system sizing analysis on the onsite storm system based on the revised flood (FEMA) maps. Your project needs to show that the downstream drainage course lies in a floodplain of the Cedar River and if it appears that there has been flooding in the downstream drainage course from your site. The Wonderland Estates project needs to show that with this design the water will not leave the site. ArN¢ta N¢NNing¢r Arneta Henninger City of Renton 425-430-7298 1 � . � R � „ � �� Y T„ � _.. .w.�.�_..� �� .�r� �; , , � r ; � _ . ,.� ��.� � p� � � � � �` � � �� ,� � � d . � , � � �' p �,...� � k �f� . ( � � � ' '. � � . V�� , a ° .n ) ,�e x a n." y' a �, .v � {s�',"w � S k . 1 � q �^ ��`�;:s�'x" i �4, �' "G. '�. �3,...� ly�+v. ,�., n� � �ys ..n d �• �•t yy 1? .f....:: w `�„a�: "��;* �� °".. '. ^` ;i t� W �' , � „��ar�,�Y�iaa'�s°�°'�3t,�.�° �,j ;x ,� �.p� y ay:, r �;�'��;�, °s�� a;, �� Q �� ,� �� a;:� �'�r .;•.� `� ',. "� � b�; < r, � �...��, �� a r ,� �9 q9 n �' s � � �Y �, Jxo°4 a �, ;.A. � �,,� ; a 7.�,�,,��w;;_. � $'k? �'tT'�»� �� m'� ��.'�� $}+U � ��S , � `�� r x �,� �� p � � � �a. 'y,�. g Ry} �" 7'��,�'Yd�'��:�'ti.^",�v'� M' ��:�°?rx�5+�a;�R�dRya,a� �,�� 1��a+ . .,.:.�� g�� . � � � . �.� ..� ..� . . . , a � w;. �, �y .� . . . . . . °,�, ,�`�z X y gb r i �. ... �+�M+�+a�+�•w� � � � .i'n� H{ �d� r r m�. µ g� ��'tW� 'u�• X � � ' '� r . �� .�.rv ., ` �.-' Y., ! ��-9 � p�. 1 t d,'.. �' � . '�N'rqj,5.i . `4Vy , � 4 m a . , 1 �8. � � ^� �' �e f a�� ..� R. � R� 3HX t ��. P;� ..�^ . a''"'.SW..a :;p rt �pS _ _ � , . _ . � �..�.„ , � � ' : ` ^ i � '. i 4� "�+- . ., � . - � �` . , -. x v „u : � .a, .. � �... »,. . .. .. ._�.._......�. ._ :., . t,. � .,=, �; r�z u,�. i �, �� 4. � �a .�,.'�' .�� m'�� k+G` .�P a^:. '�'w- "��. xf1�-"4 . � �' � � �'S � �-r d ,�„� ' � �` x .�� ;, "G•. . y�„� , �•.,,: d^ � �, "� .. ;��? �� ,.. yt:t}f� � � ^' . x. -3 .p„w � ,�� . 0� w, � �'�'� mr��^�n �!W: c °.+ ,� .. . � °°s v � � � ��r�,r §� " . R,�.�s � n �` .�a+ w u =,g �.+,.. '��'� y. � $�'�, § a w wJ: . . v ' ,�.. ��,+r�+t?d f,A f a'� :. 'S �° Tw•. F� � a F r a, r 3��. t, ,:ro 'i�^ ; .. ,m� . �` .,r � �t {x ��.'a,W�4 "� € 'h"��a"4f=,��,.�aa': ��.:,, �:4 '�'S� °w�.�-�"t i' �a , ,�t�. R� .. .:�-.. .. . � ....... ...._... ...... ., �`� 5h ,. "'g`ro'�,* �x'�.�fi �:r�.:.1�,-�-m.� R A"rti.y � � �.`. ,y��y.$ e ,. � ^ �W. � R{b m � � k' � rR 4 � �� °°+�Pu�' y a;{�'�x� � � � � � � � .,� � � � .��. , • ' .. . .. .. . �� 'dp..a�y„ � � f9 y�, �`r a�� g�a� .,�, �;�,. ,..,.,-.r � _ . -,r,r... .,,-r* :P 1 . '} .tl +�'� M F � t" '� r �a �3� „ . :. . a . . . . � ,�$ '.'°"3.{' �ti� _ w '�'ti�4,`. x�i�'��:Sr .a '' � .. , , .. ..:.9..,... i s'�; #` a ,.vx � ' ? � r� ��rp � x � a b n, r� �� ....:�� ._. - .... .n. » �, a,��.. ._ •. 'v ,. .:.: ... y�'� C �y.� .. ��t� a+�„r „�:�1 "�:h� u°.i.k^a�h:"�r .as�`tr�;^,� ;: ' � ��,`-Y�.:P1S �`.� .. . � P t _ ; ,' i �� T � � � � 3^ � Ya``^` . Rx . � �� .:....e � � � � .. . �'� ,t . f - . r b"_ �� ,��, �� , ,�,. _,.�. �� i t �'� +�' �... ... „ • " , . < ,� �� n � r� �' � r ,r.:. ' �'� .w . ,a�' � P�,�x� ,�}+�"`�� auz o-'^'k � . a : y . .. . �� µ� +.. t V a . � � L i I { 'N rf:R � � : � �� . , M Y Y y� ^" ��.�X�.. �� :��.�� a � ��iMM.�x.� � I ^r Y�� ^.� �� '�Sry �, yp l�°bN N �A�Y�j ,�` , �'�a� +n. .. y -0 � � � � � .F � �'+ �.' �+��'�. . a . .k �k x � � � � �� r,G ra � � &n . .'�: �,� E-, �k� A y'� rg�,4 Y i � ��.,�k., � �.. . � x�. t m�ff��aa� ` � .; �.�n � . a�' "� °� �� s l�,�s �. r . ., � �. � �` y, ,� "i""��,� d� �� .� a ,�� u . � �� .��e,.�?� `�' ��t �'w*,�� :� k�' ��.a ^7 A �. D 1 �. `°°i y'� Tg Sa'ea ��{dL y � �^ h �.h ;� � ' - ` . � .�. ,. x .: .. r e�f:^� a � :<k 4;��a'a _, l, � w� .� 5 .�a � c'*' �. t �' '� x ""��`g;. �, ;t a�'k'�� `��r �� oka,��i"` a�`"�r 'c•�a �*b.�a„�.a ."Mh— t � ::a ��,��t p rc,� � . 'r �f�.�� rµ.�9;in,�� 4 � . �� "��'�"z.� >t '�` .. o,; `� �:""v Sa� a '+�`�`.A r.E ue.R F +'+-. ' a. ,, . � a� ,w �� r r.$. �.. �S �, x � ,..�„aRa . F �': y3,� .. �� ^ L 9 �.,�r`r�- �R'�^ daK,1 �A ,��, � �'qM�. .�u � '�" ? I � :. �'�""��3�Fa..�� a. �:-�a�, ..t: 1 i i��8 � :}�,p,��, �^A��. i "m.�`�._ K.a .� '�� ,� �^wb c. ..S;z'` i,"`��t s$� '9�",':q'titi. ��+�''� � w 3"° �@� '��"a�,�+,„� � ... � - �� „"`P.., � ',;�s a ;_: a,q x'n,� . .t �Y�t. ,�,i .. ` +., � ��' °�'�i,�e��"f� ��x��w� ��?��'�� '�r s`��a�«a� �n.�� j .. � . � , � � �.'y�' .� � 4� �, � � . ♦ y , , �. ' � .� � � �' . �. dCkj� ,�'T ii^y R usd �u,.'{+�'�i �k +�M�' � ... . ... � . . T6�� Y'ky �Y q �'`�` lt ,� �� . � '� �' "�' �`� ��'"6 s : � ��"�"9�"'�°�Z'� �� --��'�" � ��^;'. . . ,d, : FL ,N�Y ,�y t ,vH.� � Y�� .. � v� � �Y � � � . �. �t� �w� ��,r ✓�»�a�"��a'^y��° � ,�'A��s � t`�- �`R�44�0''�„�, �,Y# , a �� x ��y�:a»,�,t�,q�, *"?k ,�x �q.�`aN y�p �;y��."'+�f�""H�d�`.�„n . � ' ,� ,,� �.� s r � �g °'�t.w ^�d "�+ � .�T$ti�''4,��4k �" ��`rc� . - .;�a `°"�e '"° a:�»�„ ^-„� . . � . ... . - . . . .. _ �W�':" '. � , {A P .:. �� t � t�a� ��` � p �* 4 .�! v vY. � �. F 5��:, '�. ,,y � � .K ,�� y s 2 � r7,�� h,�'�� ,.,5},, x� ACw� :� � � u!a '� +;"'.. P p ,�j 4 �;� � "'�tress„`�, r�,` ,rn°f `+�: : x � 90.,� r y, n. :' *v.,'� � �;� �.. �� "'"". �'` �.,�!'t t` � sa' q„'�e^ ry'�`� z ��e e,N �� Saf+Ydd.r �a a '� 4 �bW,.�,,, 9^, � ,b y�,s, .do-a,,.�$. . � ��.s. ..»s : s'��,,�'s x �C�.��':3 � -� x a:e r.�` "a N�'a& `�. S"' 4Y2;�'��<�e n� r "�q�'�"�r�� '�k ��' �v�r-. y��: � } � .. ,� wr �:�°ta a�X� ��'� r�rl�g �` z ., `,� a,�� i��: s^ 4+��.�.v� +.�,a '"p+ � , �,µ,�. �_� ��•."�"�*a`"` �d' .',�": '�"5."TM i4 '"�S� �w.� - 3 4..,,A�;a ;:" ''� t,. � � +^� ,�:: a u��,^�,�+.� �:..a, a3;.� s.,. +'� a.�,�€9c� •':i^ . "�'�✓F� .� f1a+�,,^,n �. x "� s -R s �:x � ,� ^ "°�� r�« `' ''�.� 7 a v w�..c v� �4 �� ,kx;:, -"�; s' x�:�, ,,, ta�r�: >�. � �. 4. "'� "" A� �..,, _g-s,.;�� t @ P e t*. . k'� � '� � ds , � "." -S� '�d-.F c.f: fi' s. &r'�y :v� �. ^� �'� y . i dw�y:� +r2:��a �s �*r��' ,�C, .�r'� p �,. '..,��"a� � q. C�,, ' A'�+�r� ° m�" .� �u� �:'��. �eT::a w �i°,�.�� .,� »'� �,, ... . ,�. , > '- - n�� ;r r�4� "6x. su� ��r * ., �-+'- s . A � 'G�'�.^p.:.'� i- "x '�?t.x , e� � ,. . �.ar..��'a°' . . "�.�, :..w.. �, , g .... + Y�,fKp^. 'k . " .d*,�""' ��1�%,§��'�-�P a��a,�R�� . .. � �. . n : � t 7 , x � �. ;. .i�'�,c�°7�`'�'��ar� xk3 d��n`w�� ak # � w� �� _ ��9 . j . +Mp. 4"` �` �� k ` . �^�7,� 1 � • y�� `"�3Y% ��'a" k `�'" ,F,' � t. J° * �°'�� "°'&at. �` 4 ei,#�^,. .r.� �:.�, �'° `.�`�'4�. �. r; `� � � �'� 2 :tr+� N i� �� : t Tp[°"4,gY�y�.��v�� M �`�:.,�.a '�"i+,�'1F'n� ¥ � N�x °. �k^ t . r w:��.. ,� t�e:'. ,f�� ; 4 + ° �L�.apu:Pl�.. �:. 4 L 6A� h' �.�' � �'rs. � N�:� N^+ ;': !� .. ,��. �:,,�,. ��x� v � T/ 4` a.. � # �c '' _ �» s .� " r y d:- �' �. "��p,� ,� � . . '� -�. �-:Y �� ` �' °"y� �f,J'�.'�y�'��'""" "y L � t t x^ :s r . 'SW-�y' � "a� "`b'�, .. . + � �� 7�t '6 ,� � Y�. r �4 � ,:� M�� '� ��' s,� ,r�� ' "" a ��':t�` x �s��x�`.$' .e;�ow+�• �'% �' S. . . ^ : ; : � � ' ' �, . . . �. � .N �, � i. . .�s.�' d'�r . ai . ` . . . � . . >. � �.� dw�': p. -� �,g .. � � . C k, �6��. - '�.A '�.�!'�a,�, �-s. ..k� 'V��_p�'�^', .�.- �..'Yt.aw'i'�.lie . � �- . . � �. s��x �,..� °�� 1��'�`u .. a�„v`�Ae�,��d"�'4 . °�. 4" u x�✓�'S°��aiz r,� °r �" �"¢�'r.*��'�° . ��`�s�a" . . 'd � § d A�dy y� - � ♦e y� � +. t ,�{ . �,� ' -.�yyy"w. .. . �� : x`�"� c� . ak y,a ��'� �iy+�'°t',�� X'SW�� T� . ,�,,,}• fi �.. . _•,-'�8 .. . � � : �: =f�'�,«t a ��q7�,p ,U,� ','�"p� w ,.r'� , ,.�•.c�,.,_ � . . � 4 , ro p a ��j, �, � S A-F¢'°��fi^C � A, ,: rt '^e'�. Y Wfi n A m . ' ` E . , . .. - re s.r.�"�aw.t . � .: * s � " l' �� ;�N{T`i k"� � '.' 9 �Y'�} :.M sfi�... : � � . t „ � � .�" q' ;3 '�d'9f 4 ` `,��esbawlSv' '�fi,..��.b+�P.�ky W..y .._ �.. . . , p, p � �Y` ry .. «.. � � , a. �,,.�� . � °u�� '- °` � y 0.^ ` uuq.�.� � .... ��, '+w�++^+�4rt. a� �'�'+tl 9 � Y 'J`-. y " �k, � a. � � �' . ..�. . ry- . ��` � �:. +r�'4 � ' ��\t _ �} �� ,�.,r � w..� " �+C �: . �� kc... � � S �� .. �� ... �_. � ... � .. � �� •. � � � J� "�;-.. � ��s��+w+te� �. ' �.. - x a ^ � y & �, � ." x =us � �' �+¢ ;: � .._.__�� . � . .. : � � �t �.5�,.Sp6� .�,•rs �p, :, � . ..i^ � B . � � �;. k . � �, �i�� ,� ... . ... .. .. .. ��' �`a'+ . . -� � �m-' � . r ..� �:,. � � >`. . � � �; '�� ° � :��:. � . ^ r - .. � , � : �, �.rc -w-.�,. ... '.y . �i � � � S ` �� a � _. �; � � � '�+►� o �, �� , � , , _.. _. �� _ k • " ,,, �,.^�."•�` �' ,;�,o sfi� _... . _ .._. �' '" �+�,w �`4� - d �'K a rs . . ..:... , :. . • ....,....,.��.. x �" � �»,�: tl ... „r �� u�r, � �t �. �� r . .. . I ��.i . . ..�.--�....�......,�.--_........� .,. .. � ' '�&��',w,A" a s C ��" ,,�: �,.� x : ""' ' � s ,� sr i�'ir'h de✓t k J °�r 't A" a � �a ;r� � , 7 * ��.ff �. � p� y� �� . �� d �^' R � � p� 4 i $ °''�kp��k �� 4 ��hi�,pw�� Po,d t�� ti a �p a y � � 3�� '{i� a � . -� Y15 �NhS'ed qlrv" "( � y .�'S A;g_ .�„'� �4�j : � �j . � { r'1 �� . . � �° -' �w "'`° i '� �.t �`° � .. t M '� . . . �y1�1^ � � ��„ .�, eu'r . � x , � G ' - ' . , ' �6 �` �a�^ � �. , . , .� ; �{}k "' - - � r�,,. �.�,� ,�,�,� , , � � r� �� '�. . •:lYkFa � ' �. � .... id'S �aY}, �,� �`�h�, 6g5'aT'.. . �'' .� ' 7 � t�� c ��' ��s �""�� x x . , � � � '.' � .,n ' ,�r�'" .-,._�...,..,- .� k� � � �+ .. . - �"�, r�R' $� .c" - �y. �,�� }�� . .. . �� . .S� A� � ��Y;; R.. � [; � �� E � "`� � � r t. � +r��., d d n . g' . � �. � �' � � �� _ r�j �. {,�x ' �; , "��` �� _, 4,��°"�' � �.�� ,�. �' a � ��', I � �.i:;� - - - - - - - - - t L , -:, 1� _.� � � ��H � � ! � TFACT F t ' '� . � !'N� I I � RECtiEaTKx+s %I � � iEDESTR4INl.CCESS _ ,_$*,. 1 � � � - n �;�x �' � � I 1.��-___w..-_-R-^:.,�.r_-__�____��__�_.. '-'�� e I .. .., avwoaren:a _ "__.' ' -' - i � �,VN�X10�JY I � , ��WX4't1YKP;A[ \ � ' �^ a I r.ss r � �� "��' "`r-" �.G,��!_,0�.�^�—SS�..'_�-tS ��e- �� .._ W O ss0o�o� �� ,j �" �----�� '�' ' tp '�� - -snii:�; aiuoe� ns""n aws. �R ; w°rs"'" ^� c�p I ` ' u� � ... � i r� �. C 1 5 2 2 7 <31 M15Yi7 -•- � C I iiwu8s � 'S%EPD:a�rSuaOr I m�� {�`'� � ' � ' {' � iT4::.W ^� :,�lA II�NI � A � � � .. ��..�.�ht� . PINE QRIVE j a+^., � o��h.�� o ; o�' ,�Kwm_� t,, � U�__ ..,..�..*�„t�, ,� � ,��" o� � � � f .- . . , , ,� . . �� , ' � � +�s tD � ;; ; i _,.� ., _- , :,.K�:z ' - �, 4 , , , .- ..._._, . . , W� t{{11� ��I ��,.u�n:. �• , � o7wGwrlc rt•6;ec � � . yyy'``f~ t `� � � i f �YY�C �ON` �`�� ¢ G?r. � Wn: D� jr in a � �, anava � I �s — � �9'. � a�° �a s � � N �, � ss ss u � u ^''�1 ,'r c, ,"`.•"` H ;, c. � ,,,� PCp.:POIE O y \ 1 � CWi., �E.�:Mrtt4' d F 1(NIg �j � � __ �r T1N _ .-_ � Z �`� C N S 1� �IA', ` ' ' .�`, ; oi� ..�:�r.c � � .....t- -�-" � r,� f � "�'_ ��'��_ �r-��_K��'��_ �0�...�� —�� [i • P � �.� � ` ♦ G / Q , O ; `�• � �w u 5rrv � ��1 � ..S �, o` _,____�-- ,,,,,,� �a.e.>� c:x+�w,e � ��^ � "'� ` � � U �' Oia S . L� 4S " •' 1( G y . i �p!� � \2oG�Tfit0A1 . � . � • . �- ... � , ' " 1V Ul � ......... � ^ � iI R � K � I b i . Cdk. � '[��p' ��'" �l ' � 'f �� N 'N� 'L � �`----�'� � "i.... ._. , CUw. �i � � Eta-' S70P�Wc ,^'-.� � �.. a, � . ��-�� --� , • �-r' � :.Na�: `°"`' �°"C ' i :c � \ 8�v \ � �_ ' t_�--�"� �'---�'_t--- \ � � Q � ,� Q� 1 .. �••S• " L/AT 64Mf � ' �O1 9 � � �� ..��.`r� ��O 1 ��`� ....� F wy..9.W �/' � Siw il•vp'• ` `�0}�� .. SIh IS�GO �NY/iE•4G.11 SfA�O�OU.Y ( ' j _. .-� �.. `"`' � MAPLE DRIV�"° � 5,.�, oU � , J� _.�a� !',� __ � ..-0 w�„v,n � � I A ^ ....._ 'I .r,u u,+.« ww.i� '� • ,t 3 . ' i�'.:YFCu'�.��i•K�5 `�\ � , I ;� � � v a+wtU i � \ ' �.:xw: ceGK ti[Ha; •�� . • ��.,,�"� � j \\ . >. ...-'�� _�__-_'� '-_ r_••_ ' _.'2r,.�. �' ; � �.ii a � � }` � �»usn ��til u..xo��r.:acic � � :-� � ' � 1g , . � � iraCx,ucxc , � � k+G .i ' � 0 "�-..p o SX4 -..� - n ` ♦ . /__ NOTES SNIG��pNCMWTi7ME alEq4WK2M1PdNTiblE� _-................... r, LNT COIa(iw I aH f cufa'�IivP� .. . ,, .... ........... . ...... _.r___ ........... ......... . __ �eeq( 6 .... . + YLs��noin/Cn�pl�+L � C CnJ.NO.nI..w��Wtu[ntMA�+e�El .... ; Y � �t tu. �(}gpl S :[C.1iVU5u�lxiUCE] �. .. 4JIt9NNA.ENOi 6 ....... tl .}. {_.. . 1...... r ` � ::D x . -t.... . � ... .... ... ••.•••••" I'^"_ ... .........i ' � , i rvMiNNGSMJl�S1xUUtE 0�nIEMu a�Mu:.�i�.wG , F � � \_ \ ...... _r '... + .. ,_._ .....C��p� ._. �.— r ___ � ..... . ... . � ......� ��r10_ . s roAwoW�w�tr«.�iw�uro Func�nra.n�icvnea«�escanKawiscw�,eu ��u ..-�-�}.... ... }. .... ... � ..._. . A...}i„....... ' .A.WlAIkILVA .... ..... M'EP%W....—•� ... ...... .... � �Ny . .. _ 1e ! TYVE.�'.09�MiUEC�lCMBws�viYVYlilwoCiwll035HTUDSOi _ _� ' i �... tW,lilf)b� ��NN� A�� ut � !MF'XxY a 'vKi�Mt-0:nliLIGECATC11W51Nlrv[1PEXOErui�mi.aN��;'lMl �y IE.i!J 9RMA .A.. . ..............i . _......_ i_ _ ...._._�Y� . _.-........._... ___ cv{'�ff'lW1' �. f � 1 . .-' ir.u.ro�r�r ........ n_o�ait� -� " 77ss77 ' � :� n-°m�'�tr�'�m s. ,naci�o�c,r..renoe..� aw.u.so�. � ) nw ....._� .. ._. ..__ . ...... .__.. . � _ '.,,,,_.�- ..... � ..�. � .._... ..t _.. i ao,_• I .. �LHo�Kf I i F�-.....�_._._.. ....... ... � icurtwN�tip1 ... . . , ........ __._� �4FI_ RFP.. wr wt . --�- � . ..�.. . ...._.... .._._ ._.. .'_.. .....r _..._ , ..`... . __ �txcrma �..., �._ ...... I U vm ..( ... rwowon.t ( M ..... ._.... ... . ... ... ..... .. .. � — � _ __ , � �1'_ �P _.'t u �. a�aruno� .�x > aivaetw,... — � iv,...,_... ._. _.._ ......_.. __ , _..._ .. . . ..�....... ..__ .....,�,_.,,.... ..�.._ ......_.._ ._ ......... .... .�..,t�,..�__......._. _— , i �._. � � � _ _ . � .A ..p .� . .p � E �I �R `�+ . . -8 �:I � 'a � ��-� � a'q ..� ,a, �� 4* '_' • � d , N R � z PROFILE 1 � PINE ORIVE(LOOKING WEST) eeccwnrwacirr�:wne� wrwicz�rv�� .,.M � ......-.- . ..._.... ... ... ._._��. s .._._. .. .. __. ._.. . . ......_.......... _ � . .. .. ��. \ .. . '� '�. _ .� . ' ....... . f ... � .... .� .... ''- __... __ .. . __ � _. '.. , �; AlC9E�N� � � . ... 1 : � � 1Nil.plpa 1 ! � t :. �i0, I. �..._ ... _.�- ' � ... t._.._.... .e ... . .... ... . .... ..... .. ........... ......... _ _.• �.� ... .. �tp.._._ .. —__........ .. i .. .....� . � ...... ....._... . .. L. Y ..... ...._....................� � � I �. ....... .... .— —��y rwnHa.0 5 x �—•�uanVoava ( eK ++o $ '�r . ...., dcwiuiwe . ...... _..... .. ._.._. _ ..... ...,., ..i.._ � . . � c�teawa ._1 n.�1 i i�i ,�o I .__... �,u. .. .... __ . ,. .. ,— .. _... , � '� ,-� n soaru�ri+� u�rU.� . . . . ... _.�. .. �m rw � � o,ur. s..._— ' __ i ............ �. _._. � _ ��. I ; {t�� .i F;.�c.�. �: —... � 90iRdN�.._.......... T 0«t00�'I�A1 � ...�. r�... . .... ... � ` t YAV � '100,}� .......,... ...�. ... __.� ..�t .�....,... � ...�..._ .,........._.. ..... _ ... ..... . ... .. 1 1... ...� ..,..._..-r--.... .�... � s -. ., I , j . k+1% ( y� ... `I 2�1F �001� ; I �.....� I ... 5 LW�tlll�Yq ;J � ..1M 1 � .. G �-.�.`.�"�' . , i K- r. �trw1 JF Ja.41t1C.5➢1 �.. � .. - _..._ ' . ... ... n � _ � ..... / '"�,.aeernorVx � ...........� .�...� . . 1'SYT II.��MJ41rMt1 ... —� , ........._ .. . ... ..�,� ... f.. ..__ ....._..,. .... � 1\ '�. 5i'umox�a� i '. ... . .... .._. .�......� ^ w I � l . � . � .i .._rr`.w rarniq.... z � r �r� ,,,� � ' °°-- a.�'`reA�nrwiniN�urw ' w ra t*�+� ( o�neuetrn) I } �� r si t wr� H _... ...... L.. _. . _ ..._:..... _� ........ .... �_ . _. _ ._. ..............�. ............. _.....' '_ , .... .. . .. ...... .. m I.. 1 � .... ..... . , i � Call _�... , � f ' '1 , , nProrg y9 � �.. ...... ..__.. _ . ..............._... _.. . w. �� _.._ II �... . . . � � ' > 3:g `� „e .a �_ _� �i� �o � -§ __,� 4s :la z'g � 3 ;1 D= I tj - � �.. ._ .__.�.. __. ._..._.. ._._ � _........._.i�.__ �.�....._..— ...._ �..._ _r.. � ..__ ........I 1-800-4��,M55S �� ... ..... .. ... ............ _......_......... ` PROFILE 2A PROFILE 26 ,•��""'�• c'� MAPLE DRIVE(LOOKING WEST) a„�r , �OOKING NORTH /�I?� ��?''`'^' ��J�y ,��+aM i.,� _- � �,,; KING COUNTY HOUSING HlIf1T�l.(ARS W A4s"°w" —�`�*°�m c�rvoFaeNroH WONDERLAND ESTATES s�za:zu� w� AUTHORITY � � 9 �'� sroaMoanianceaeruur INFRASTRUCTURF-.IMPROVEMENTS -.. u»�"w , °^��`nn�!nKr�c'r � w�wm �,. . �� STORUDflAINACE UDZOI ��vo:. .ivvi •-•», �".w` �,.imeru..�� -,�µi�s�� ANDGMDINGPROFILES on. ............. ......... . .........._.._...._ ,--seean�w�cer�ruurr�sse � ' % w ca rtn� vaNr . .. '� _. / .... vets ca�o, .........._ ... . ..__ � ._: .� .._.T . . . _.. i __. . , x, i i i � [:�ie� w� —I. .__..} ...... i. _..... . , ..... .._. .. .... i �.._�____ _ i ..... � �wr�a» aWmaanq[ ... .. ._ _. .. .. ... ._ � ... � __ . ... ..... _ i _..._.. _.._. ..}._..___"' " '».... . � w'ci�t.irw '{'' _-__ __ _...... .... .��"' � . � r wrae 1 �. ( � u,. . � i __.,......_. ..�.�.__�__�__J_ . •o niv._._...� .............�. .. _......i ......{..... ; ......... ...... _ .. X..... C�Rt�lu."dl� .....--t � _.... . _..... . ..............-._...» I - � � : iuirCKr +- _ ...... � i i ' .... A sn� ____. _A..... .......... ....... . .... _..._..___—_� ._ . '� .._ __ .._ _.__. { �_�,o avarn�r..f ._. � _A.. 1.. r _� r"a(Td0)%t"4 � _...�. _..... _� � I _._ _ ; ,:.��...: : .—...,.,,.. .._,_,_..... ...�. . ... �i.o¢oiae��ni . . ... (.. ..W.. . .....f i � ., . . i ._.... ,.'._ � ... _ ._ . . ....._ _.. _ , -war.xmr.• ... � .._i t ..� .... .......... _._. � Yro 105f a� 1 6VOKi'1.lt ' W�WS(MnOR �'411.N) I ' T��,��c�; �-�;.a� ; _...:�;�°`�.� ... _.. .. _- �^ ; _... 1 ��;;�m" _ �'�`i �_�; . � �;u,;,,r:: _ ', _ , �... . �� ., ; „ � -�� , , ,. . _ _.____ �� 4� � ;m___ . _ - � . -- - . ,. .Q .. R •$ -A � �E .B � -Y �,,... � �� S � E �k PROFILE 2C PROFILE 3 MAPLE DRIVE(LOOKING WEST) OAK DRIVE(LOOKING WEST) '; _... ........ __..i. . ._.__ .. _� .._...____ � ____...... _.. .__.�w ; .,__ w, ,. �.... .._�._._.E ..... _ ; . _� _,.._ _ � � ,: _ ..� . „;, � !... ..�_. { _ _ _ _ ' NOTES � _ � ..��. a.d�,� , M � �.��„a�a��.��.u��,µ�,»�,�, rc . . ... .., . .... 1lPo.M4 ...... ........ ..,,,..,,. .. ... ._._. _. ... FnP OFTE0.K NOTE9. � ��p —�--j ..."� � ' ` � �I �CPO fi6TpN 1. JEesMtUp001ron�0lSCLNlH4Wi!./�R)p14nu1[nOfE4 u ._... .��.. T.. � .. i_.... � .`.. ..1.. .. ... � �! i �.. . �— _ ...... i .... �..•......... ... ..- J. NORINW/�NYL�Y WON��OWIiEn65*PUL+URC h ..._........ .___..1 � : T.... l l _�- —.....�y .,.,. � �� ....... .. � A. vGF D 0^.LOHM DM rvM:E V.I�N. 1 3 .. .1 .� " . � ...__.n� � ....- _,—� __ . ' o.uriw � rnaiw.ro�sNrenorsTwciuncuncas . ._._._. . i_ un�Y1_.... . __ ...... �� ..._.....��i rs�o .._� .,a2rctR�awmnrrvr� _�oa p-�y � Ep YI� T f 59l {�1 ' f ' f r V � ..._ _... � wn ; rm.a s�ai ec uicn ans�,rv nve i vFxu�.�iw�x � �� .._.. ._..........t .._�i ...,. . __. � ... ....._. __..._ ..._..__!_______ in . � .___......_�. _ �onn� CiB�� a " i � be ^ � � � '. � ivVC.+�rGSXKlBR4i[MB�NNIYVEIPEROETNLOV[/. y�U : '' i � ' ...__ �Of@ _ _'i I _ _ ._. +' .. .'�— . . ., � ' > rn=r+cpo�ewri�.rEnoE.ti�is�.uxei ��y� w ' P ? " � fi if ¢ § � �i g 1-800-424-5555 _ _ ' I .�..�.,,.�...�..,... 3� ____.. ....__ ._._t W Y•�a.�•'.;i'Q.'�. �` PROFILE 4 < A � T �':��-�,`��;��t =% BIRCH DRIVE(LOOKING WEST) — ��'�� ..,,��...,..�� . ,„ _. _ ^ . � , " '��.:`-��;:��"`� ,1�.�.�.� ` �, KING COUNTY HOUSING }-�� "�''9'`�"• ""'�"o �A4SNOWN arvovaeNroN WONDERLAND FSTATES � AUTHORITY �•r �...�. � \ SfORM�RAINAGEPERMIT INFRASTRUCTURE IMPROVEMENTS -• "�"° UD202 _n o�`."•v .�.+vnu v a�wn,ws.r � z.� t—� STORM DflAINAGE �� xr n.�c u . n`m"' „,,,r,n„��,mw v..r.ani�.:. � ANDGRAOLYGPROflLES NOTES � E.,..�o�.,�«:,��.��.�,�� ron cW[�H'niEs.� '� ...... .. .......... �YO v. . .. . �_-3 ........... ...�. ._..._ ip e v6iw�ruWotioNonF�nsr.Ea��NOr[au�Da+NNw[Nui�i � � I �/ � � 'I- �� ,.:.�� .--�—. ,.. ...... � �N� "' . •.... � �GEBIIN4�NOPq19tt1NMUW�nnOlr^µ4T11u..�Mf ��0 i -. ��.... .._�_��'".�. �___.. .. .-1_ _ . . ..... � ...... �0. .. ._...,.. 5 diuOMN.[NG M!}O.,lMtN011i11UCryNENatvv � aTM t�LWI{MIO! vy+� I W�TER41 4CWFRR.MI ////--1lfrt M�G � �09NNM11E �... . I� aNtN1! t '1TN9�MSY�DY.... IM110111l:14L � ....... -} ��WAIfR ........ �..�¢.`�YRIhM .�"O n a�o��'�.'xYr�,u�rEFcnitMnb�.1VIY�vl110Ei1,loo�]s��f YQIIYapI karp �^ f ; i _ . � � . �r.+oeinwn . noc�raaHu�eec,�c.s,annar:mnoc..�ewr, -"�a .ti�... .Y.�.,� ,,....�� .._._. ......, .._ ...., ____ ._._ r aol -,... _ .r^a�caxa___ —_. v� ,..• �.� . , ~ ' / T a rACNc�o.cnruaenuc.�iyxr�Mu �� ....... .... ._.... �_...... � ..... i ._... E ... 1 i... . . , I � ' � WLI YUtiV ' �i1SN(p IOID1 P �� Il � � tllll!'C�YP y,�by�4TM11 �. roauanw.L n-0o�1 ammys�sr ...—ari6�atLt* _ � � �.i4E .� �._... _.._l�4.4.tP.°'�•r �i _ _�.�. � �: +�. _..xn�rt�n1.. ...r.a _..__ i a �� ' i i i „ : _ ..........._. .._........._-. , �_......_� . . � ., -� a � ....�...____.__._.I....... R�....�._ � � _ � � _...................�_.._ �._..�� PROFILE 5 PROFILE 6 STORM TRUNK LINE BIRCH DR TO OAK DR (LOOKING NORTH) (LOOKING NORTH) � _ _ _ " I . __ _I " I ; i ; ° �ar��a�.« - i ,_............._...... �� y � . _. r.naiwaRw.nE ! Oara+eurr, wareaunant - � p6i 1 _ I r0 T�M t ' 1 ....IiYO ..,� ��a�1�� .,. 5�.�NGCAMC V . �. ...__ , :`- 1ro. II I rz,e/ Lrrr �daTonui,�nF - � r[ Prci � , .._ 9w00CIT.it �t/MCaLM ' S!!!�L IM � Y�q,qip�lt,f! * V / e �� i \ ci . e�.. . __ , � _� . � � �� 8 —— � .....1 W 1 1�.. . C.. _ YMT�M%.p! ` �� oEl�Fcrt�n I `wAiCP�.no t fW. %t.W YM wai�wiw.: roam»ar w.r an iw m.�oi�� "' .�sn 'rr.i�i�+�irwn i0"'n� �j�v.w,�m>m C8�1 � .�r � - �, . I .1..__.. tit,w.i . ix.�ut�wr r";��,u�� '::,'o;;��',�;-_ ,�,�,00�;��, ,o�,�� _s�� r wn be(oreyou � e t. : ,a � .....��oo � � ° �...........� � Djg. 'n � : ? � , � 1-800-424-5555 < „ �.,.,.,»...,N�.,.,..�. , _.............._.... _._.�... ..� ^ .._ ._. ��!ir.�� i a;<� - PROFILE 7 PROF�LE 8 PROFILE 9 ,�«—, PROFILE 10 a�� "`R��'� _- LATERAL TO CB 7 LATERAL TO CB B LATERAL TO CB 5 � ' ` LATERAL TO CB 2 7��, � �-' (LOOKING NORTH) (LOOKING NORTH Q�, °ev"°'�'•;�y;;' ) (LOOKING NORTH) (LOOKING NORTH) � KING COUNTY HOUSING Hl��5 nssr�own � airor icv+rcxa WONUERLAND ESTATES "'-^''_'". •�x AUTHORITY �Wa�T .. � � srnRMopniNncti�kMn INFh2ASTRUCTURE IMPROVEMENTS -. y ..�aa.NAeaaKv..yi � e ..w �''r� STORMDFAINAGEPFOFIlES UDZO� d:a ., , �nrn > c^� ixw. ..fe�.w %..lemllr��w � �,�� ,� ,� ,� , F» :»� X� w x qn W R. � C �S t {, "a. '� A �X F �I M`��`' wwd�: 4 �ih h.z , + «d.� 3w. ' .k § 1 �'� x. `}• ��' a'�w " �,. � �: �° s^ �j' a "r '4•x:�v„� „—rp"±, � �, � .'�y�A e" , ��- . � , F �`•;�.�. �9,�tt� ,'a�ua. �'�my�',�.. �4.� m.� $r;°�� ,�.,,�`'�°"�}'x �w#�.a a :x, :�, �4. ...p �".P�,}3,.�? �� C� �� °4a� ,�b?�.; �, �g,.� ��. d�'a.."Q;p: . �, '"�: :..�'�i'�8��y �'„�� , �..��:kr»°�' .a� ;,�; ��a�� €�� 'f�'d�:�w,"�"A ,r,�.. k �.4"°°' '�.�.;^�"tm� �� .,.'"�a�.... , �as. �� '��cds"1�'�.0 .:4m ��,rt�;. '�.�". i �:,;t�. '��',�.��x:: r},��"Su� � s«.q yer�^� ��,"p."y,'�' f � �,.ya y,�,� � . �' "' � ''# 3:d 4 �e s,:� d �',y.. `"'�' ' �.X .' ."yp'kr ,'� �,:�. � '�'�x ��°��w�' "`:�,�°',�� ,� �c�,�,�� ¢t 3��s��: 3 � ,� �'�� '��"��a , ��'ak#±�s r � �th��,. , � �� . � �� F. , ' '� � .�_ . �. ..� �T ff,� 1'�� ."* ,��x,� � Xi�p„`x�+'�� ° � '��'' ,:,� ��e � $ e � yd, ' ✓ ?.a "+kr a`�°`.�'�7 ��yF *� �� 1�. �� ' .. � � . ._. � �� F�y�� k��k�b..� �� P.C�J4" Y�p��Y��u��w qA .. ' ' . ,� +�nd M e &F Sk u�'dNy d`u, MT��t� ".� ': . , ^ . . .. � 9.3. 3a��F ' $. '. :L.. '�a,Y .. x��g ,�� k sA�+A,: �. Yt�S`� � . J �� 4 g � ��' . . , � & � ,. �� .. . � w d. : e , :, _ �. � a �''� ✓�•^. ''�-�'x, ,,�� . pl�'•^G*%ry" , , � ... _ . . . .. . . . � ... , p ' ' � ' " • . y� , � ?, �.. � . . � .... . ;.,...,.....m,,,. ....�....., . ' y��7�'�"�i'k��f��^:. . . . „ .o..o. . .. _ ... ..... . = � � . �' �. . . ��=F^�... . M, ,, ...:. . . �.E . .�. . ,..'� :� �� . . �'.. . . . � i .. . .: ... . .. .... �x.� . . . . . . .:._.-... ,... . .... ��-..,�....�....+.......�r�.,�.. .. .. . �. '�, . . . � �� ii ��? �,o �5 ys °L �, . z.._ . ..... .... ��.' ._. .,.:.-. . �� } � .. . V i , � � :� � a � � , . .�" � , .:� r �� . ....... .... �,' `'�y,��S' ........ , wy.: '� ; .:: °' �.�... � � � * 5 �� . .. ._,..._ ; . _d �. ,� ..,;tr ,, �x �.�.,�M� �,�1 � .�;,r � � R`� �� "' N ' ..� . . .� g�j �M . i „ . `Y+.IA .. J � � � r A � �S� �V ��i 5 ..... 'i� ... . . � f . e y ♦ p�� . �,..�. " . . •' ` .A Y w Y W + . � .� Il�Y.' . i .�x..•��y�� w � -e1 ' 9 � M �� i.Vi . .a" �. � � ^� �� ; �� '� jY� rY. �, . �' ¢��"� ��}�r�� f7' fi"�� . . ;e tg �-..�+°�:� �' � �.�� ' W� � �• :� �'� � � 4�'�'�.� . �� ... ,.. � .+��r74{':.�.RS.w+a.� �a�, .. w I .�..�a i 4, .�. ` ,i uY .: � �,.� � �M�� ZI � �'��,k•R•s��k"� µ" � �%�M�ln Y 'ei% �. , � .� � .. ' ... e . � 2 ! ';MF'i 4 ^�j' :.,. .� . , �� ... . .,. y rV ' " ' . .. t , '^�'y.,, �{� ��[ % ��y$ �' �� -......� ........... . � � 9 ¢ � 1 .:� �1�. � � . . � .. . y Je � � ,q �wG.. J .. � .� 'R ��T' �7 ... . _.....,._ , . � . � � 4 i -�. � `� y� ,N . . � r �.. ,.. «_. _� . .... � �^� � m• "'�,`,"'""b`��^�" "�.' ma1 "' �:� .. ��.�' '� � �} � � , � �. i `:, � _ ,�„ � �� , � � ..�6��:�.�._. ' ��:, a �` r �,,�,,.� 4 �.n.� 6� �a, � ,�- t� � �# � : � � � � ` � �`r�' . .� ..d" r .x� ,d� tl-""�� r!d� `.wwa'aa.k„„uew.iCw,�. ;�r�. -0 ' ��,+�.��`v��r d � :�5 ��. sY� x yB�r+ q . ;a� �, � �':a r z s �. �_ � (� s w� _ ^�i�� . �4 ��,7 E: C� ,�t. ,_ '=',.... 'r,� .. � . a.o"�'4... .�a.�V�m,,,.�...�'` . rv, a�„Nv '� .' � - � �, ` � . a� � .-�sf�t. b � r �,� ° ^Sy��,a�7«�`y , � �, � „� �� ' �� : ;� , i � . a� , , s,� t � s i: r � , � � A� x . � . �" �' � v � .'�,y�`'.� ��""��,t°S"xw�'n�, :�,�'S'`,�' � �.� �� '� . x �^ �g, q, �ry,, '�. � . �, . S".. :'� ^?� �. � �, � '6�u�A`p° �rg"$�'�+��`�" � "�"�� i r d�v E �a"�,�.fi�"S�a�'Sk a8d:'d ��i�"'�°� �I ,� ' ,�„� 7 ��9 ,6W �M�ra�t�pW� �y��s.�r m s �.u- . �'a`�� . "�_. w R � , - a.x 'YC' +�"x�� mb - .G.. +y:� `°'::> } ' �,'�� : ,. �m. ''"v��x... ' }:. @'' .`.:� �7• :, , �. ..�:. K b�. � pr .�. . �.: . � - - 4 .-'... �:. r� � ' t . r,�.:cA;. ,__,.« ._ ��_.._ . ...._...�.. . ..... . �. . ' . u o•• � yd� '.. . �..', . . . . ..... . . . ... , .. Ra �.u�.x �^ ..�? � ��. . � � . '.:_:.. �.��. ._. � �.. ��.. (��, y�e .: �# �.;e �, a �,�s � �1a�r '� ;�. . �t R }k�d'� � U'�_ � �. 4 4 � �� ; A��4`d��s - �A� .Vf , � G �t� .�''F . �. ..(� . r . ...�..�.p � � , a -�.s_... �..�. . �Ak °Y`p �+ -��; a. °.., �, g";�"��,.ra i x� � � ,g, , �:m��x g �``� �? ex �'�-r�,y,8G:�u' k� "i5 . �"�F„ a �k� �'>',�+�*� � • ,<-a rr F,.'r.rm . ...N_.ffi "�, A #�.... �`.;,� ax2'x4rr��"¢�'��'�"� 'C b ° �„�...,�a�a4� #�°"��.., q� �""..�� k'bk � �y�'+w '� f � »� e, ^��= ..,�.� ' "�" ..,� 'a.. .b. „ � •�� ' +i;;�C 75xir ��; r�7�r, �p.� °� � �" �'�.� �'� k.r.�a -� �'�3 n,,� � �tlu��.� .va, �� M"ro wµ '"u ;.r '�ti�' i.�. `,�' ��Y � �,,,�d � ��»��.y4 '"" ..�G"�' �i�a�, '�� w,"ve��a �w. `�:r �'.�^ �•�4ma.,�iie°,1'uN "�""✓,,,"'y � �� `� d"�: '� '.� .dY �;t.� ;M�� Y�::.. g46� "=�..�'�' �"�'w'^i�rc "'e�'�'��'�i� . �`q� ,.W'i+..,C� � "�'k t R ��Y i � & .r.� t `e�:" <,e„:;��r �� .s-." 3¢ ,xrea �:1 C� f 7 k,Sw�� y�'n�;�,r�TM.��l�ix�'"�:� a�. �S; b k 'y:��: e::�.�^��ri '� �e��`"�resa�r'�x '� v� �,,�"'� t"�M � . a a X ,:, y T #; -"k.z%{ .+4, s, a.� ��,��';r,' 'q. Ed ��w A,,,� g�' a, :. .�� k t ,� R r s �,^°�� ro g�a" �� vt�a' A 1'� � ,W , ,:s�.. .„„y,�p +., .Ya ��"° #��y '�� Ts Y�'�� ,�w^��,,t� .�'� » �t��r J�d �+�.. � .�;�"1"�y,��,.�,.,� �. , � .�r_ I'. . - x :- �, u�� "r qr�; •��,k �,':,q- �'2.�F: r ; . .• < . . �.. , � . ..�: , �� ' ,� .. ' � .: .. , .. - .: , � w �F � . , . � ��. ��" a ,. �+�^, i s , � . - � , , '�p a: -be ' q"F � .y _ ,� ��J' S� �. � ' �.. M� !� 8 .i� � G'b v 4�S�,t�p }�` W#�9q ?" .. -� � � x`'� +'i�cb.� �< r�. ° � �.. e �, �� ^' �"g�`�� x . ,� .i. a r�� '� � r ��d1a� ��'d8 �M.%. � 'S�r �• �"'x�*" v� �' ,5 "�"� i�'.' � ,r � ,t,� � � ��,th� �'��aa�� e �� v� �%�� qattr,� k'��8�-� �`3�� h �s . . . . , . . a o '��'��."• � r d °"7,'�� R�'�°.P .�8 'a",ar� LK t,�� a..,� :a,�,�y� ,�.� pn - .Su��t S+;r"'.u° e"s^ . �`.�*�� ` � �: �� ' �:� ,��, �"� �'��e u.. �� » �� ;„'� ¢��.�� x�� g��}� y xnI .� � ...� ��`��«�3�CY`��;.�� .`�,�, " �� .. . � �+:yK°"�.tA�'�ulY.�-"d+1'�{ A+K� � ., • k �L k4 � .: �. F � .-i�' . ' �, � � e x �y. .. . •'� � . .�� .. � " ��s � :.X c , ad,:; . A ��a�� h� L ��£�. , � � . � �'x'�x ..' � „ 1 xR3�� i � �' � -� � a° n+�p� �" �`�'bY's• .� r�W � � '�t N �$vw��,��`x,�"e'�� * i , . � � � < . „ �.� : M' � r .. v .,: 'r , :k 4 '.'"��kWr�w � � �,'M mn'�Y�. .A,.P . .' . � ' ,�{r ' • `' ' ' , .� . .� �'.: �w� .'' , . . ., .. � .,:��,.� a�, ,< ,�� ,:. ,.; .,� , . i , � . . - t,F"' � . =Y�„°"'� ¢� �� . � . . �. '�'" � �� ;"C.[ ��. � � ;. .. � c :;��a a�y � � � � ��y,n( . ... . v �� , �� . �;�� "�� ,�� w;��` v�' .�� ° �� .� -� •, �iy ;' w , �� '� �°. .• r �. �' :�. , � ° 1 �� `'a�' ti . . , . �. . �-� � '� �v y'��w „ .� .�, '�; � .. ' . �� ., ;�, ,: a�� .. �� , � .. . s .. ;x : , .�� d' . . ys. � ,..,t `` ..s:. d. � . � :.. �� ,� „ : �'. ,x; . -* ,.T ,,... , . �°i .r,� � .as ��'^ �. :p». r �� a � ... .. :. .. s.��. . . _ .: w � � ✓ . . . . �.. . . . � � • ,' c.a ' � °. �' . . . ..ti}� �.'s x �, n' � .. �� ..: . . . ..... . ..... �a °' '�,rr§,.*� �.. .�p� r* .' '� �' ^V a",C..;� `� ��x� C 'Ay'�'. y ' . L � �.r b ,��M� �4` S y»_ � S� . 4!� . � . . r. ��i : a a � ` . . �. ' ° . �� t � .. .� ; ^ , s t • � , :, . ... . . ,,..�� , ..�,» : ; ^w6 �.r .^�4 �� , . . . ' .�r'°W:.. �"..�+'°ti rc"�.'7°u' . w..,,,k°�.^," rr �i. a � . x . Y.. �.� vwµw r yy .. .... +�— � �.' .":: a.:..� ,*�� M Ygr''.*��.' ' e... �, 5,��a.„y ,r y,gr,�°.,c.��r.�..1,}� lx,y ��u�•� a;� u+ �� .� .,�. ., a� m. � �} .� $ ,..: �:. rv'� � : '�-, a_. �S �..�. ,a�.�.W+r ..K�d"t�.. �' �d.„,g . �a �^k�#" k;l°�'�k "� '�+ � .x,� k�' ��". g,� ax��' x N'4�� :ta�;� �A4 '��f��wF� £ 5 � �� .� 4vA4�^W � ��r.�....4.,...M.7,.,....u«....�,d..FF ..�I aa.,'�,. �wu� Y� ��',� ' � 'Fv� � � '� ;�s `m x Cw� :c w � '. �r � �... d. . .. � � d � �� Y. 51�"'B'��6i. �4 pY" � -� y .� . . . . . . � .�y, ''� �'�9 u�.,, y,' e"�. .wy'�. �. �a"i'fix� ,,..t�a � '�. �" �� :�.�p.s. � '� ,�w' � . . .. . . ..�� !y�;x .. . . . . � ^,� � r r"� �� 7 J` ��;c �v; � _ _ �''�n� e. W �' � � �� x �,�a �`: � # �e, � : d: � � ,�,� a� : �. ' , . �'�� .BNak .�1r� �'�M � ��yuyY" k�F"Y=. S �'� �� .i 1.5%�`tY LA t%� �p" N. Y '. y a �� yy i� ; ��. .ia. � �� r 4u��,� �yy� .�m.Y♦ .:.�,.� x�k�'��f1W�" er�„ L. r;�a,{. .,��;t+� gY � A k� �nV . �pp � '" ` .A v� •�P� �. 3 :� ' .�� y�.'p�, i .. � � :. . . . � . .. d' ..e f . � .. '� �,.,�+'�� y� . .. . ,�..,.. �� , � � A�Fi ,-.` w�''R . .. .'^a. 1iY . �A .�,�,..:.�tw�, . ' � �� . .. . . .... �. �. . '. j_. , :: ......r�. ... . �`' �9 r x x -.�:� +` .« . e .. .., k... .,.—, . � � ......._. � .... � �� . • 4« m� ..��„ . �'"��t��r�. ,. ^"a�3� ..�: ......... . g � ..... . � i^�, � _ . �� .. ' � l�y„' : � ��1 u � ` . ' ��4,� ' i � a�"�` ti A��: ,�. � ,"� � ` � r ,� ��"� � .„�' J Allen Quynn ' From: Ly, Viet[�ly@Huitt-Zollars.com] �I Sent: Wednesday, May 26, 2010 2:13 PM To: Allen Quynn , Cc: Helling, Don; Simmons, Gordy; Manning, Chuck ; Subject: Wonderland Estates- Pump Storage Volume !, Attachments: 20100526 wonderland storage below 100ft.pdf ' «20100526 wonderland storage below 100ft.pdf» Allen, II The following is a summary regarding the 1990 King County Storm Drainage Manual's (Manual) storm pump storage ! volume requirement for the Wonderland Estates site: 0 2-year runoff volume is 0.646 inches; or 28,600 CF (over 12.2 ac site). I, o The required storage volume per the Manual is 25% of 2-year runoff volume, or 7,150 CF � The high "overflow outleY' contour at the northwest corner of the Wonderland Estates site is elevation 100. The surface storage volume below elevation 100 in the northwest corner of the project site including the new pond is shown below (please see attached sketch for location of calculation). ,, o Pond and paved roadway = 5,886 CF (218 cubic yards from Land Desktop computation) o Off-road area between Pine Drive and Maple Drive = 2,349 CF (87 cubic yard). The depth of storage at this location is approximately 6-inches maximum depth. Total Storage at NW corner of site = 8,235 CF Also there is additional storage volume below the 100 contour not included in the calculation. This additional storage volume includes that within the conveyance system piping, and from surface volume at the no�th end of Oak Drive. Viet Ly. � II 1 DEPARTMENT OF COMMUNtTY c;�Y�E AND ECONOMIC DEVELOPMENT D ��O� �` M E M O R A N D U M DATE: April 13, 2010 III T0: Allen CC: Kayren Kittrick � FROM: Arneta x7298 � SUBIECT: WONDERLAND ESTATES STORM REPORT MAPLE VALLEY HWY. Attached are the storm reports and response letter on the above project. Vanessa delivered a set for you and a set for me. Please review. Thank you! i:`,mcmo.doc �U1TT Z�JLLA,RS HUITT-ZOLLARSJNC. • 814E PikeStreel • Seattle,WA 98122-3893 . 206.324.5500p1ane • 206.328J880f,u • huiG-zoNars.com Memorandum DATE: March 5, 2010 TO: Ameta Henninger, City of Renton FROM: Chuck Manning, PE; Don Helling, PE �;.J�` "�� SUBJECT: Wonderland Estates Downstream Analysis: Biological Impact Assessment This memorandum reviews the potential impact on downstream wetland and biological resources that may result from the proposed drainage design for Wonderland Estates. Two downstream watercourses are evaluated: Madsen Creek and an unnamed inteRnittent stream termed 'Stream A." Huitt-Zollars and The Watershed Company visited the site on March 3, 2010 to supplement ea�lier information gathered by Huitt-Zol�ars related to downstream impacts. This memorandum contains the letter report prepared by The Watershed Company for Huitt- Zollars, and additional material prepared by Huitt-Zollars, including photographs taken on December 20, 2009. Please note that because these documents were prepared independently, the photo numbering system may appear confusing. The Watershed Company's photos from March 3 have been duplicated in Huitt-Zollars' attachment in an attempt to alleviate any possible confusion. SCIENCE 8 DESIG �>- III�, T H� :;� WATERSHED =_ ' ;,,�_ �-, !� COMPANY . �_ . . .�' .,_ II March 4,201�� ChuckManning, S}��m�.�� r�,r r-,, . �,,r,r '� Huitt-Zollars 814 East Pike Stree �, ..�. . . .�.._._..,..._: . i Assessment Mem� I' The Watersi ' Dear Chuck. This memo addresses potential biological impacts to Madsen Creek and the un-named stream(Stream A)west of Madsen Creek where stormwater will be diverted as put of the proposed projects. Potential impacts to assoc7ated wedand areas were also explored. Madsen Creek Existing conditions in Madsen Geek were observed during my Mazch 3,2010 site visit. Madsen Creek is a documented Coho-spawning stream. However,the portion of the stream below the 6-ft x&ft box culvert th�t extends beneath Highway 169 hzs been highly degraded as a r�esult of the high-flow bypass channel constructed to r�rry high volume stormwater flows directly to the Cedar River and by the right angle configurado�►of the box culvert itself,which reduces stream flow significantly. The reduction in high-flow events in the lower portion of Madsen Creek has led to an accumulati�of fine sediments in this seginent,zs the energy level in the creek is not high enough to tru►sport gravel and cobbles. Additionally,coars�-grained sediment is regularly removed from the system when it accumulates just above the byPass. Nearly 100 percent of the substrate below the bypass cvnendy co�sists of fine sediment(see Photo 1). S�lmon require gravel and cobble with little sand or silt for spawning,making it highly unlikely that salmon spawn downstream of Highway 169. Salmonids atso require adequate summer base flows,which do not typic�lly coincide with storm flows in our region. Low flow stream volumes are,and will continue to be,sufficient to provide access to transient or migrating salmon. Since the current configuration of the stormwa�er system provides little to no function in providing quality salmon habitat, removing the water quantities that would occur as�result of the stormwater system re- design will have no impact on salman hahiht. 750 Sixth Street South Kirkland,WA 98033 p 425.822.5242 J�25.827.8136 watershedco.com L Biological Impact Assessment , Huitt-Zollars ' March 4, 2010 ', Page 2 ' Just upstream of the confluence of Madsen Creek and the Cedar River, the flows of Madsen Creek diverge,with a portion of the flow turning west and meandering in a shallow,low-energy,riverine wetland system(see Photo 2). The wetland contains ' seasonally ponded areas dominated by small-stemmed, persistent emergent vegetation, including reed canarygrass,soft rush, and Watson's willow herb. Based on these habitat conditions, the wetland may support amphibians, although none were observed during my visit. Madsen Creek was floH�ing at relatively low volume during my visit, yet the wetland areas were inundated�vith approximately one foot of water, on average. Therefore, it is apparent that stormwater re-design�vill not have significant,adverse effects on wetland hydrology. Any potential impacts to amphibian habitat would likely be beneficial, as amphibians prefer stable systems ti�ith little water fluctuation,a condition that is increasingly uncommon in urbanized environments characterized by high stormwater flows. Stream A The proposed stormwater re-design will discharge storm drainage runoff from Wonderland Estates Mobile Home Park (Park) into a roadside ditch that runs along the ' south side of Highway 169. The ditch connects with Stream A approximately 0.25 miles west of the Park. Stream A then crosses beneath Highway 169 before turning west in an artificial ditch on the north side of Highway 169. The stream then turns north through a 14-inch corrugated metal culvert where it discharges into a shallow ditch-like channel located along the property boundary between Ron Regis Park and Maplewood Golf Course(see Photo 3). After approximately 30 feet,the stream enters another culvert ' approximately 20 feet long before daylighting again. Stream A had no flow in it at the ', time of my visit and e�chibited little evidence of regular, consistent flows. No visible I outlet or connection between Stream A and the Cedar River was observed during my visit. Given the sparsely intermittent flow and the lack of an obvious connection to the Cedar River or other salmon-bearing waters,it is highly unlikely that Stream A supports , salmonids, making it a Type 4 stream, per City of Renton Code. Additionally, no ��, obvious wetland areas�vere observed along any portion of the lower segment of Stream �I A. An occasionally Elooded side channel of the Cedar River is located just�vest of the � narthwestern property boundary of Ron Regis Park(see Photo 4). The side channel has ' a few ponded areas that contain sporadic aquatic vegetation and reed canarygrass,but the channel is primarily non-vegetated. The ponding in the vegetated areas is likely not consistent enough to provide amphibian-breeding habitat. Furthermore,amphibians require thin-stemmed emergent vegetation,which is lacking. The stems of reed canarygrass, the dominant emergent�-e�etati�n, are h�picallv toa large to provide qualit��amphibian-breedin�habitat. � Biological Impact Assessment Huitt-Zollars March 4,2010 Page 3 Given the lack of fish habitat,an increase in stormwater flows in Stream A should have little to no impact on fish habitat,particulariy salmonid habitat. Since no obvious wedands were observed along the Siream A channel,increased stormwater flows should have no effect on wedands or wildlife species that rely on wedand habitat. It is possible that stormwater flows hom Sfiream A could reach the Cedaz River side channel in the form of sheet flow. However,those flows would be insignificant compared to the flows that would enter the channel from the Cedat River during a major flood and would have litile biological impacts. Please call if you have any questions or if we can provide you with any additional information. Sincerely, ' Ryan Kahlo Ecologist Enclosures Biological lmpact Assessment Huitt-Zollars March 4,2010 Page 4 � •P'•';.�'r. r f� �.!il� a z. �` =.#�� ---� •.";s. T,' � �.ti`�s ,,�i � . 4 t X •�� i-: i ��+irY •` �, ,�� ;i ��`��i�`! � ��, � � h { "Y} a`� '��, r�� i��ra , ��; ` ��` �� , 4 � �� ,� .�� ,..� � ��:= ,,;- . ,� r; �j �'+;. '�' � ``-'� ,'.3 _ — ,�,: � (, � '� ��.� � t��t��{i#� ;�� ': s �,.. ; ��`r .��',,4� s�4�#� ��{ '��`,',�f �- t �. �f . r` , }�#��^ ' .k ��'��`� ` �• � w� � � t � � +�� x� �r y�� -'�^ - ` �r/`-�� ' 'r�. : � ,t:. . J#y�� ? � iLr ��. �!J`' ~ �. �� q� �.�� ). � `�_ 1. � � �i '��•��7S,��x � - �w�� •'Y � 3 , �i• r . .i. - - 3..9��.. ,�,..!-' ` ..9��►-�' :.��G �, �'+� .� s-.� �w � i ':�' ��,. y � . �. R�Y A � � S ., . i.7...� `� �� Y, ,r� �f. � � �= � `�.��`:�� x �� ,� '�: �- � �t�� - ,�y �'r �Aa �-. � . i� . .a�' _.. �.��! � � • ��7►h�ir � � +a� ��°� ` �c"��.1 '�� ''��1�l',.`� `� ��/^�i�� f � Photo 1: Lower Madsen Creek,north of Hwy. 169. �;ote lack of gra��el �uit��bl� f�,� salmon spawning. � �_ ,�. , - ` � � :,�`: . .;.: �s�-:� ' '�` �`�"�- ,� >� _`r_ � _ . '�t ;�#`s�� rt � � `.�: `... ._ �.:�-;w's.a..'�?I"�' -.;? < ;�,,., h 'l c�...��F'"� �""}�:�.>��,,' ��=- �• �: n_.*e '�i��'�''�`�am�` b,f r�c .. � �a. -�� _s�: '"�� M � ,.. . . '�� . jr- , - .��,6 a� s = R, t is) .f� ..��pt�`!� `� �� y .� '" F ��r� Y�_;,,j . i. � �i��, r `� �„ �. . @ �� .�f•e t .'t,;;: s' ;�r�`� j �;: } Photo 2: Riverine wetland associated with Madsen Creek. Biological Impact Assessment Huitt-Zollars March 4,2010 P�ge S ° • : ,� �''�. i��,� , r, '�j > ► .�' �R'�+ �x��\� Y �+ �1�{ L � ��/`t� � �i' t '+��'�!R > t !.s`� �. �� 1 Y Ris � � �y1 y.; i , �Y�. •"''V �• ��c�" t �� ' �� f ,!fi '} }� 1 �• +��,�;t P ` � .� *�M... \1 '�_ S .� �`F . �y,J q � , 1 � � � � .�"_ ' •�� j ! I _. J �� . � r. f`��°' , J ', �f`�I 1 �� :� ��., �. ,;r,��, a► ;�.�.�, i ''�� . � � �` fj'; ` �.Kir.� �' �'�9' �,� ..��T�f'�� ` � :�_ '�r4 �,�� ' 4►��F, '�,y ,/,y �I�¢.3 j'� � ,• `� �tr ��I"�'��rY �� -'�,'�� '♦♦♦ :i ` Z� i��t t r / ti/y�: , . �� .7 � � ��p � � !.'Ipa�•��v �� . �,� 1`- � � 1.�,� '1��/.. � �, '�; , � / i� � r�'�i�� Y ► �^ �`` 'r�''��} ''��`9e`!�{';,�i�►.��'--' .i,"��j,� �� —�� r P � �'Z'!� �w r9 �S r : i ��', ,� �►� � �� Sr � _ .�� -�# _.� �' '� � T'� - � � • 1�� ' 7� ,�'!?y-��*" ' • -�� • � �r ��'._ �� `. . � _ � � �•�' :a;��• ��-'�I � � . � . _�. +,k;� �„i. / .� � Photo 3: Stream A f�cing north at its emergence from beneath Hwy 169. Note the lack of hydrologically sorted sediment,indicating the irregularity of flows. I � !;�:.. �4:�` S. '' j .�:; �; � ? i - _�..,, �: '�� -�� , - `� '�#- �;. .: � '" ..,— � +.� � '- 7 ,�I�,, �',�,. •�, �1�-: - �- ��,� � -�. � -:�,. - �� - .� ��:;,� �e;.� , °.� '- 'r�;�1C„ 'nA- r .`� %v ;i. h _ ,.�-,c; y"'- •� ��s � ' , _ y "� � �� . � � t� --�..�- -� � t,�; � _ .��,a� � �- ..�.� ��_"�`�",�f�-�-� z..,��.-r�•t- �` `�i;. y Photo 4: Cedar River side channel with significant flood capacity, facing west. — HUlTT7SJLLA,RS HUITT-ZOLLARS,INC. • 814 E.Pike Street • Seatlle,WA 98122-3893 • 206.324.5500 phone • 206.328.1880 fax • huilt-zoNars.com ATTACHMENT 1 : PHOTO MAP KEY, ADDITIONAL PHOTOS, PHOTO ' LOCATION MAP Wonderland Estates ' Drainage Discharge Downstream Photos — Map Key March 4, 2010 Madsen Creek Downstream Photos — U stream to Downstream Photo Date Number Taken Descri tion 5 December Madsen Creek- looking east from near Wonderland Estates 20, 2009 entrance road as it flows in front of Wonderland Estates and enters box culvert under SR 169 6 December Madsen Creek- looking west from 149th Avenue SE bridge as 20, 2009 it flows west. The Creek is approximately 10-feet wide with water less than 1 foot deep. 1 March 3, Madsen Creek- looking north from Ron Regis Park Road 2010 bridge. 7 March 3, Madsen Creek- looking north from location adjacent to 2010 comer of Ron Regis Park. 2 March 3, Madsen Creek- looking west, flowing west adjacent to the 2010 north end of Ron Regis Park. Stream A Downstream Photos— U stream to Downstream Photo Date Number Taken Descri tion 8 December Intermittent Stream A- looking west, drainage flows to the 20, 2009 west in ditch as it parallels SR169. 3 March 3, Intermittent Stream A- looking north at 18-inch culvert seen 2010 from near trail alongside SR169. Further access for viewing blocked by fence and dense blackberries. 9 March 3, Intermittent Stream A- looking east from golf course access 2010 gate. No flow outlet for drainage. 4 March 3, Cedar River side channel-looking approximately southwest , 2010 from bank of the Cedar River. ' J:115093201 Wonderiand Estates106_H&H104_Reports12-8-10 draft TIRlphoto captions.doc � � � . � � � 1 1 '! Y i V 1 ,� � i1�.�� ,`-d� ./�` l� . r// �.��' e� ,� '` * �'_ , ..� _ �.'• :�'� - Y �E �; _ �• a z=,��_•,�t� � �: ,�.. �.� ( • �y , � - _ � � � ; 4 ei t� � � - .-s� '�t �,��,�.'jl y�l . ��E� ��+.. .��r ♦ .:i - .,� '.) � � �e•# �' .4 j�.. ;�,yt��; �,j y�.+ t�", :i , . L.� 'r �'y't Y�:' >:�:::'.�..3��`��:��i-�:,� - . - -+S- . 'a;".�- � di �- - ; ;� ,�,. J�: . -�. ;�,. _ � � � � �" e.-� �• .S�r..-+ ,. t 'i ,w'. 4 � ._�; �: �.� � � i" , ' f �.E. _ �: r,/ y � . �;; a � - - _.. ', ,. - �,; . ;,. - �_-._ _ __ ";�. ,_ # •.. �+ ;�_. �,��. . � � ; , �- ._ �� . ,,�r :` � . �� _ .a. _ .:�. ''�y _ �� ..�� - w��' .j.,,, �i.�- �t,r�„`' F��.� �:� . . •. - '.�2- . � � � 1 � 1 1 �' •� � �� Y �' • � � � .P �,�r� I a 2 ` :,. ',�, `�� , i ; , ,3? � , ; ; , �= - � � � ��:��5�.�,r -�+`��A�,e�� N . . .�_ . .`� �.-�Fy•p1'{+� -'��!� I �.e�.i� _ ��' S . ��5��• / ' �� *�•'q� ,. * , - r ._ A � , �i � "``�'; ^'ar s� • . .� ,.� -E- '7 +�s { e i � : o n . � p yy 2''. '� �'"� �-�-� -�-� ��` •.�� , ' . r� 'r `� ;.. . �-'ti` �. ��F�x��;« �J� - � t- ' �i�-�. .a .\�,t 't� .-.t :� �'' . �` � �+:r'- � s; : t ..- ,.� '�. 4 �� `� +*y' ;�,J:t ,,�; i� `_�,��' \ , ,�� .,y ,� . �v��--.:�} ' � ��r�''�9'..t .'as' �« +s„�'' t J'�-�p� .eZ�- r._-� �� '��..'1 rh�. T{ � i .��. + ' �'t�. �� u��' ..3 ' � �- � `: • r i ` .J�' � : � � Y ♦ � ,�.�� ' •' ' 'I � x,��i -J�•�'`"� k � �� '...-1 � �� -_�¢ �' .+i . `� • s`t � P�� : T`r � s 'Y- �` �-1} . �"''• �� a �r'..i ��' � h� � � r�t � Se'3 �>'F}4� Se � � � � � • '� . � Bidogical I�npact A►sxsa�+ent Huitt-Z,o�lars Man�h 4,2010 Pase 5 ' � ,;�� ` �` �y �iJ'�a ` .. '> �r :.,�_�. �3 �b,� 9 t 1p ,�� _ � 4�t�� .;� `.x' �� t '� � -�� ,<f. � �� r'� � . �.. �; . � � I �� - ' . � f��;.,�1� r, , � , �� 'i��''�T'��+: ,�'::�•�" •A .�,� � � , �� . � -:,;:f�! ( v �� ,y �y��,�. � t I" � ��}�i �,��, a � � � �r f ��I �► ` •�*. ..��`��°,��:�;�=�� .. ,� ��,�.��,:j�_�,A `.F a �' 1�` .�•��_}j`�;� *`1""�� . �,� .�, _'�,r;s�j� � _ t �' , � ,s% ' ' � :+ r� ��.�- �;� � ; � '.t �,. t,s r � i�' i t�,� .� r � . 7 , I �� • '1 " •i�'. Photo 3: Stream A facing north at its emerg�a�ee fmm beneath Hwy 169. Note the lack of hydrologically sorE�ed sedimen�,�ica#ing d�e�e+egularity of flows. ' I } 1 �' :� E', �r� �, � k y. ' �: :.4 t: - '}" .,-', f e ,'L y ' ¢�r3 �" )' .�.�.r ea�,��►+_' �..�,:.'K't:i _ �_.y,� ,A��C � � , . �p•�� t c�""` h,. t �. ��.�,��j� ?�� ..��T��r:'�..��"' �-a: ,1- . �� :,. r,.;- _ r . Photo 4: Cedar River side channel with significant flood capacity, facing west. . .. . . . � ,.. . ., . . r.h 1 �� y"p�,,{ ``Y rt :�b�` y �� °F .;� .d� A�e \ 't"q`y��ab �� ,.l� 9� ��r ,f� ��;t•�j )'•��.. -� � � � �'�� ! l�'.,�`�'�Fr ��p.ip� �,�� !�� ' ..i� �.y li�, N i �,A�"' �l'7�=".�$4"�� c0��r�l��t��i�� .!`,� ft�r f'r �'?�� .��k '��:�'' r 21 � � .�1 e ndS, tk�! .e� � ,'t . ' , + +l�Y3 ..'l t{�+ .��fl .�«�'� v'r��,� ,,(� lt�� ° , ��.a�J II .vo,� � '��'�-.'?�"° � �.� �� .. , :�, � ��kr�� `' �''"3 v .., �� y 4�- . r . .'!' . � +a' . '� .. . . • . ^-1�i�� r�h�aRqq''�c �`�w�� A�& a'�.r . � ' ..;_: .t C `�u. �- . ' . . ¢'� ;: � J � ,, y ' ��x ,, �,A . ',' �y �',. '��i�� J,. ¢ � �� /� W T� a� � .. ' " . �., _ . - .._' �' � r ` �'b° '�'�� , �` � �.'",;r+�+� J� � �, '�3` .,,�/�,�� ; � . �r ,� �.:, a . �� " �'� 's ^�`:-..,.: 4 r �� \ .•u �� 9�� ' �#d �. , ,i�'rc�" ,. ,. .. 4 '�1,�.'°�'�°� � �'�.. . . _ ' - - U ��. '�'.'{ , ' . ` r` � � ' .o.. �"� .. i . � _/ .^�i�- ._.... � '� ~ � . 9 ,, r� P p.' {� '.y �� ., � , � _ .. .. x+; ..-! .� ...� ....� .� � " `�� . � . �� -d► � �� ^I�i�....r __ - � #�".�Te � � �. '> t r � ,. .��, �f«�, ' �-. �_�._. �.+�C�-��,,,._ -..�. �. "�:;� -',� � �. '� .��..�, � .,. � .-a�!� �. �y „ t r. r,#; ..� . -�.-• r . � � .: � �r. r . � c� ��y �� r��y�.. , - " �ri�` �"�''�Y �-� � '�'4'� � . �� . �`�� ,,�,`,'.�/j�- '-'a"'.�_ ��' ,`"ai'r�".zi � 1;y � � �� q"�- �.` A.;. • i . ��w'' � �, ..' , �' i�. .. _'y �'r � , � �ai��,ti'�i' r �a:Y ��,�-�;` �-. , b�i� "r, et� t�«.'�.�l1' Y�te.x� a_.. i .. J�' .� `� ,. , .'� ' _ � _ ,� � • ��, �1.`;"y�:� ' �.A.��„ r� ��'�a�✓*r- ...1dp� �,'�''w_'..��r- , .. : , ' J . t ��-�. � � � `'J,�tt,7 �;c w •� �i,+�'�'Tw.,�V ..�, .a��"�;� • ��/ ,.� (� � , �� 'i``ti� y�,� �' '�� n. ', t #�' o, � ` _�� `+ �,�a �+ ��`` , } t t ''� t�y,� �4� X _� -�� .-n,r ��".' ��',;?�� '�Fo!o^y�u" �y�,� ' " � �� . . ��'" fi�'��..'AF»,'�,q.��.• , "' . , _ ^..y .4t ,�''11'.:r1 �f,".'+�;r�,��`..,. . � .�-..:.r- � ..' 'e ��+'^.�•.��..'y1� � ,� '�.1 � �y,g� - + �3�1'i�'<�f P�. I' ,. - _ �� ,.; ..... , . . ; . _ . �� k,w �..e... w�.� *3�7, `� �iw :��,.,. `• ' t �� `F�� .V� i E, ,� '1 i� '4 j��,j, �_�� ;� . ,. �` r fi „��i��j jk y,� .,`� +Ftr� I •� `�, 'v � ` ��•� ''��' t'`� �.a!'' ..� '��'.i.:. ^ *,�ro � ..t r' +�, , � _ _ � ��31�. ;� .,� � �-�. . r ,; �.. t ':3 �t� � °� �'��+:• , -_ � ��.. � � ,� yn �r � � _ �"� �n � �< � , r' _ f ; �, ��;o,� �``� _ • - �� Niny f�t' J � i � * 4 � �� r� ,Y! AO� L� "�'A . � �`�Jy�l4'� � �t � '�'�. . y n . . - , `,�r. '_� �.sl. .'1^ , � �� .,` � x � � ,��, � �( � ,,� �- _ w� r�"�,� - ��,�� , r� � ;.�' � �y ,,(( � ,�� o�„��;,.� �` ��,�� ,,p�� ; � . ,�'�+... � �- 4 )i�'�.i,',`�li��h� N.�dl �� c 'i 1.�. h � r.�. �,^'r��,a d�". , .. 4 �_ , � . ..•. ,,., , . � '�, 4�� . b .t %�w r . �� r+C' �.,� "m . �5^� ,p_.� � �M r r� 8!qC�:�� {��' ��w.�: . �4,n.�'�*t " �;b. �,.. Lv �� /p :��'i�l i �'��4�, il .-� V `�(1�. , dj' '�.a�:�, .� � )» v �� !C� ,� . �' -�� {� V"�..t `�� e s �a� �r" :� , aw.. - . . k }y �`:r'�,�b�ti�'��r.. 1��0 � ��f;. . � � �,,�,a �Z`" � A.c. ,v� �:�:7' ^','»-+►- � s.., . - �;r�- ��•Y.. ..� - 1� ('t,��:�'�` ��'ro`��,�� '/� �� . } "5.�$ ��;�:i.� �� ; �r'�",� -..�-.„,. :�.. . ,� „ � , .,,c, _,,,.� .-_---- ��'�r;I/".' ' .��> . .;'";� � -.: �� i� . , �a, � .et 1 1� ,� � u�> ��• �:-i • ,, ;. � �i�� ?F��' � '�1 r� .dr•�, � .. i t �� -, _; • ., : .. . ,_�kf�� '�� v . `" �E i �,�r t ,j ..:.. . . �, . > '� .� . r _�..� .: . . i. A �� `A ' q : �a;�`��m�;; � '' ,-1' ,��Rr, ,'� �;'Ql,�A�" y�t7' k��`� , r�' . , s . .� �. �:p .� °. _ � � 4 �*�. ,�y �� ,, - _ t . �` "xa �Are°°'�i' :� .., _ . �:;� �� i� ►��'t ,i��Y �,� �t /� � t Q�/ �� °� , t4-..-.-'�*^'.�,i�,n � �'` ' -�" � � Y ,.�. �w. ..wY" � �. � . , Lf::.- � n l �/ i L �l��r�Y� R� • v _ '�f �,��y .� � w#-;U� ..:,,p'. �� .«r�",�'"�q :. ' ' . ' . � 6.9 ✓�4"' � !� S' �Y�� "� "�j, @ ti. .:i rl . I �X i °.'�. . �. �,, �F'r,�v4}rd��. ca��"{v "1, ��'�a s.. �;��,�� .,c.. '!�'i"(� 1� A.�`�,;�i� 1 fl��4�1''y�(N141��.��r, �';� .. ' r� � y 1rI � �� ~� � � III I I � i r , ;,�, i:�ly ,., e "; t �r'�,- "' `d f,.:��,� �,n ,.�e� i!� — , "� �`i'� .!. �. �r,, I,��1 J ��f^l�11i�� `f rs��!`` � � � � M �� y(�_� , _. �.--. ,. �1. �R� �� ` 9 L �t'� .i P"",�,p'i" , .. . ..'." . .,,,1 �-�. .. ,. x p I �am � i �M, 7 D�j �`�' � „ Jt�� 4 � ,r. '< �� I � , . :� . „ : . � � y •.v.�� ,<.,� �, .,. � — .� �'�* ��.��f `+ � . __ . .. _. ' �+��°:ti' r '� .r .,�� r � "` �,, � � � �_. ° ,�, ,.`�„� �, ,, �y ." ._ � k , �v�d� �a,�� , ., ,.w . � J�' _____._. ,. - . - �c � ��' � ��' "�- � r �� , y��Y�1�w. ��•y� *�� +� .�, �: �r ,.,�,��`w x _ �'.� ��"�'-.. ��(y�►' l� `�'�, �y a+� i,•�1�t t � . *��0. r c �I� .� F �... �cq . r�+�1"` - - �,� e. ��, . � �"�_�� r Y�A.'r�i�C�'1x�,�P t L�iQ,°�raM�w ....�' � �, x �.� "'1i� ��}tit�r,.�� a, =��W* v.y„'Y':�t.� �� .,q�" �`�"�'t y' .�� ,,� <,�, _°,�� + � �� ` ''� ,# " �e � . ,� ,. .u„ .� �.,,yl '��'�t .�r a.tr�• �'+ "Y, � ... .��p .y . � . �", �f Y'*��C�, . �..-mi� a�. ,. _• - _ {y�, ' d., w��4"- , .. _ w � � - � �� . � � •��`� , - ' _, e� k w. �v.. „ : , A ,.� r ',;." �I �' liiro� � ,- w� M. � r �„ ��.�.�i�r,��,, � _ � , � I il � y„r � `x. . «... � ��• � , " �, .�I . K � " ' �''� + � ; k ,� . ., � . � .. , . . _ , � �, � ,, a ��am � � � — , �, , ,. � � � � , , �� , ', � , _ . ,� � �� . �� i'. �r.� q�f � � j.: � .� 'y :�s+ k 4��ni�9 r��. �i' . �� . '.. �: . .5 . ' ..2 i +' i " .b � t 4� 4 , Y � '�� Aq J� � ,,�.. ` ` ' � f �J y � # �� y � A � C • � M . �+ �i , I'�� • �: � ' ? . A h �b � . i '� � �1��`+� �'< � ° � � � %�4�_ ,;i �� `tl�-� ,�y ,<�, : , � .x , � �:� � � �`.{ �1 �� I �, � �� , � � _ ` �e ,. , .5 '. � t �� ,� _ ,�,,�-� � �� ": � i� ;�� ' , , ^ � ;� �; ��'�: {�� ;a ,% ,�; :y � � Y� ��x, �, � � ��'� �, y� ��'• , � .y �� `? �5 :�. � .�y �� i�',,i��' ��. _ "'`� �� K��. , . � �; �� ' �� ,�� , _ � �,�� ' , ,..:, �+ � �,c ,� f� y 4 ` (j��.. ny�} i��:. �.% l i � �-�. *• . � � t 1 �4 :T� ibS�'e� j -�l �� '� , :, �� ;�� Q„ ��• �~ �y � � ',..,t_� ,� '' tK < tr -� z'� F" i y'�z`:��St '� ".�, �� A.�L ;�� ..I�� _ i' � �i_- � .� � ` �.' "'4� � 1 � + � •`� .a �' � '}p y �jj �q � + _`y . t! �` �,� v�.y•yr�- „�� t �' " � .f�r � �.it .�1 . T 1 1I ,�• '�,� !' ' ..,.pwt� . . +�'�J� F, � �. � 'T �L�ytl:l[� � `� � . ��~ f',� - .. � �-� - �• `i �r'� ' �: Jl�' �' w�s' � 4'� j��- . ` :�r q�. J '�� .C. i'�'� ,�,� 1� , . �� . � K ,_ 4-�'. -., ��° p-=. ,, . ..;,. �� .�r�,;; " r �. X.C�� i'.i.�'/ ,{� ..r � �.w'^ !,�,;."� H . J�� t `� � b .. ... : +. 'r, < . `' , � � �� +^ � � .( .� � ,e� . ..' '� t+;�-,�`�,S .�. x' ` �" ��,;.�•; ,7i � „/'��:'�r A '.�� p s '"'�2�' 'r _ �. �� "� 1 » "+. . � �,.v` �. �� y 3��5��'�� ' S� . ` i �� , ,� ��e�:.,w . ' �'` � i,'�� ``� N:�,�f��'�i� i� ,�� Y�' . � ��i1 , � •� � �;,,�`�' - .� .: �. ..,� .�. �:.�. �w= �� _ � � �.� ` � �„�,'�.. �! J��\'` �/ . ��'��' • . i �i ,�`�" �. � f �� `.< • i �•.,.. y'�'� , 'r'^�., '��: ' __ �� . - •�� J . ' _' �'` >, J� ' qq�� l..,rr.'+y�`7� . I v .� //"" �� !i_��4,'. �� " L -3 � .' LL : �} � ';� _. . �:'�%,y� . � . �{ ,, � �� t� � -� �,� .�� , r�, �t�t1-�- • � � #`1 ��..I ' .�, � �t'.�., �*.� ' �.. ��` s_ (/ „ y� I,.�' � �.�� _ ,t'�I"� `,Sy�. ,� � �Ly y.. //�/ �///�� -�� .,1'� �°�� y ��.�4. ,�p,..�. � ,. - f ��•_Y�!t' . � - `" �`, �J/ �/ ^� � -`�- t • y'4 IV'�,_ -, A� <�P �. IL� `/ � �,t - -�_ �'�- �, ; f// �/ J�rj/ } - �- _ � ' ; �. ` . �� ff /� /�5 '� �4� '� � ' ' ' ' G��//'//l/�//Y,/�/� � �-�. ' �\ � � 'M''�'_'.S'. �J',�.,{.'9y F j ..�,�.'. ,H''I��'�a r "a.�� ,dE.: ��•�"�/�� /� ��yyj�'� �'S'� \y- '�4�-..-1._-� �•�- Ir�V'4 S�asYF`� ..y .��. 1�. ...,� �g,��Yb �� '�� ilr;i�, .t'�� ,�!��' - t. �'.� � ��•',� '�' .t s ' �`ti ��F.' b' � x � / �r ` ` \ . � i -Y . �� - _. �. _ � ��- �;�-��5:�.� � ° ��,� -��il� � ._ `� � ' . - �4 � �G fr -1�J,�;: � _ _ 'ae `: �`�, ;�� f ,a vi�. �. ` � V: .i� g. _ �s _ • � �S"� �a � �l�r �� ?`. . m -. '- �..' ,. . ��` � • r��. ...;� . "�,, x' _r. _ _ �� ;�� % _ . . h� �. . , , .: - .. _...v��r i. .r I�.,/ . ,�� , a . -v+�W;� .��rt,� •>'� ..�-�IM� .r� . .- = w�'.,`°��a'-�r R'*-�' � .'. , 'tiiG" • � � . _ _ , . . � � .1f- . '�j��'-c�� •, - . • "' .�• ._...,91` . . :'.,' � ..:� , .r .� . � �� lP,�d`��.�+�l �. ��. , . , ^^ ^-tc.i,_-• ". ..� - �'+�a . ��,� �..^•� ' . .. t��R � / ��.� .��i��r, �., . ,, � _ ` , , "'�'.'�� ii-�,� 3'x. .„ �.`:; � .�, �. �_� .a.�� .. , v"��"'„>�"r �1 '►'� �'!ls T ` + �:.i1 � �" � .. .� �s/3� � .* ._ + ,� ,..r �`� .. �;. r � � '�w��+ • � � .,,� � •1[_R�+-_w!V^��/ '.� � � .. . . .' - ' ` ' ��y#Vf.'�� _. ,. y./_. - ./e�`.- 4 �'i f � r' ' ��!'��:� � ��yf7��j�i=� • �1.�/�-,.�J��'�� . .�� ;y`r.�. . .. ` i�@ 'r'��' • +��.�� p ' . V', i /� ' .�•. .. � �/.�,t, ,., "� _ � - , t� ' '� '� . ✓ ,�•r� - _'cr�•• _ . .� <rn � � .► �'�� i � � - y i � � " t r^ _ �� . ,. � � � . . �L �p,�, � ��:r�� P �' _ .- , �i�,1��( -:� �.y ♦ �l� i� .. - �' - _.. �''�� .. /' 'J�.''x"1� '�' w ' �` � : � '--'�► �' �,.. � .t _l�4,^�/. � ' ."°�� '� ��`�" � fr" � .4'' 'y �r_ r ,�-� �'�t ��►.;4 � � .,`�, , �; � �,F'��1.�� •i' Y.. p . , . � �� -� � ��„�ve y �� t> f�� .R� � .'� s „��e � '�,',��.��• ~..,- �� "•.�z. ' . .'.I,' �1 `�J^ ...v 1�/�/ � . y "�. . p ..'� . .. ' . ,... �� 3}��!` •��. ��' ' � ��,� •�r •,�q Y _. . �, , _ ..i +� � . .,�: . � ' � �r ' /..i�l,�;l _,�.•� . �-k"� • ' y' _ �" �, . . ; ,. ,�y:�� ,r'� � �I; �'.e�� ,/_� ,�nL�� . .�� _ �j �� s,��ry r.,s, ��!, r� .- .��I��,y .. � ,_ . ... � � ��,�. . ... ,;:3 il �� ,.'r��l, ,1�.,�►� � iJ,I.n� �' 1 Z��. �/ • � i 1 i: ��'�p '9��`��!; .+r� .i . P , � �y�_ �` � �r�,��f '�*�� ;��f� � _�� ; �'�.+Ir�` � Gj , q y,. "7� i � "• r " f. � �� 1� C _ .� �'. � � .• . , , . � . � �� , , , t : ... ,, ,� �� sA �� ;'"^ �� d� . •' �',+�,�E , � , r�'r!�`` ��i, C Ar � , . � � � • . , r i ��'' i � v � � �1nj �s. ; , .- , � � � + r ri��,: � �y �;:, , ,,- i, . �F t m i� ��',i��JI�� {� ,� � ' �1 �� il��« �ra r�l �' ��, ��, � : � ,.� � ,'� ,�1 ;,,� ,. � �, �� , 4,� �+� r ;�. _ _ � �,: , �r. 3, �;�: . �� - � ;.�� i.��",.y� /. ✓ -�l�l� (� �i �1.� S `� � � �� ' �' .�J , /, � , l '� � " �e� c .�.. � �. � ` �' `�4� �� 1",� � . ►( �'� ' i �5> , i '� � , �� , . ; .� �� ,. . � .a , �, i� ,-,,'r�� '� r,. . ;� , � f ,• ,,�5��,;,;,��,� ,��'� �� ; �, .,�.,,:., ., ;� .,,�' �,;� �� } 't'`�!�" �;:* ;�l,�y .IG�A�f, i. . ��.f.• -�♦ :�.' .Y' .r '��'1 i � Y (r �;� '� c ;�Y, �. .� �y� "��",� j �Q' � � �,�' ► ,,�.; �,,,-, rs�, ' i,� % � `'� '4 r `\4.. , ..,r` c�K ��:7�'�' T't,1'f. v'i�. I I,S� t��l � •�..� - �� _.r ' .t^, r ��.,'�` r �� ` j��': `�A��1',-�`�.,• y ��,«i � ��/�y/��.r ��.G�� ,�i��;�r:lT:' �d' ;�1�. N iI(qr_ � ��A � ��e ` - . , � y l� i/,X Y�fI� � �✓��4'� iil�� rA',J1� �, � �4� � `��\1 � � �"!l ^(� 1�;�yr A �A � !�! �.� �,�r �I`�''/� ♦ �/�+� �;Zi� F� 7 � 'tr� ,r�','r,,�F.� `�,�� " � 1�1 �,� � ��,,\1 � i ' ��.�` J� �� r r � w ;�, '�;,{,�.�,.��,�r: � t 1'� �;r� '� „�� ,�,�,��; r�� 1� �� ,� �� ,�,�q� �� l� ..� r ,'�+�� {,� .�� ,. a, u�,��,� �:;� ''��, �� . r�'�� .�:• r S .��' !�� '�h� %��I}�••� r s' �� ,d, •,r. 'r 9, ��„ '� �r� '} t j'�' � �'4,� %'��1��'^:I'y ,� �," '�I��-, •r � 1lfi' ,M ,� ;} yi:,,� �t'�•�`� i� r '9''�!,' �"� � ',• , ��•� ��., � ia�,, �'��R:%.w. !J�"�. � •�;�'I,�ji� '! 1�� J��:.r,,l/tii:.� ! ,�, y �� r!' t� . ,� � fi� � •;�'�,� �i .I�.; I ' � ..4 ._� �,.� � �,� -T�� . . ',�r � � I � � � � ;� � � fi �11 , • ' `,�, �!� +r ?� �A .. �� r� � - ,� • . .. �_, � �, F '.1 ' • ' i' �1, /� t �1 ' 4 ` , '_ �`: z `4 . '� 1 r �1 ':7�- .�a: ; t t� ,.or t. � - ',�'/C;x i /, �� }� '�. '`�i �� :�1 w�' ��"� �C { � T.�A►' 11 j � 'a.��,�� .� r '�:� �`� i e��:�� ,.��` �•�; � � ��j `�, n. �� !', /� .t��{+. ��' ',�.} I 1 A� r�� ' ' 1 �,. �' t �i., .ryi 1`�`�: � ' �, "�e,..l� t. , � R,•��,� ' 6 ��. .j�' ; '1 � ,; r �,�. � ,�,_ p � ,�f f • �``` '_"'" ,� . , 1( '.�,�\�'� �.y"�14 '�. . �� .y��;/�� , 1 � �r 1 . . J�. �� '�{ , � �"� .1F. � t�L."� �' `}l��q�,�.�:' �rd ` � �`', '�Y ��rt�oc �j` ,�b,,1 � e , � � ,�, . .. � (� '�i (,i � �, .�4Fi. ,,� � If - �'�. � C .i�1�}}- y �,y�'r�. • ��`t .,. ,}`, �` . \��.�� .G' y, ` ��' �� / l � �i� � ; , �.` "r , � ;.�Y � ". . : ';�,.dt*� ,� � � �aW1��.(P�' ��j� ;I ��'O. ` S� '�� •�i 1 '� 't'�, '1 . `�� i.'�``�i '� � �� `�'�r�" .�..--"r"��..�.. . �- R ��.: :�� °,-+ t� ,• ��, � �.�� n �'�,,, .�� r '; . ',�;�i "�'' :y � �✓f � �i'. �� t�� :t �``�,7 ��: r � �� - .�,. ` .,�t�- '.��+�t�. .1�'�(,��- �� '.�f� .�fri �y'. Z� ��f ,�!'y ,.� �, � e l:�\�.r,.� �t t'�"�q,� .�>�"�"6�+�� t�'r,�l�9�a ��.� ?.^ "?�''«','�� ti�. /r �3.7�f ��'y'i �.i��'��n P �!• , hf f, .-, . `��,�.,,� �� .f " ,:� r!�''�1�.�{.��';`al/��'�, ,�/.�/"N. '� � .A� �t t �� .i.�' •'�•�'� � � � ��3C.��, y �, � �}�.`�` (� � �. -.• y�.� •.rt♦ �'��` I ,A.t�(, '..�. / yr,. 1 y w �� I' .�..i-+�y .. , 1 � ;� . ♦ � t � � .'� +� ��'/ ti � �� ;.�9'�� ?'''j i� "'� �, v;l��' ,��`�- '� ,� ; '`"°��',..-+i'.�'��' '�,r� °R•"{'.r�'`�r�,.., ��f. �,` �� r/�'rN♦ �A!�.�`�f!�it�T�� .ft :,� yjb � .. :T� ,� ._ \ ''i�' T Y . F'�r:' _ _ i�Tt��+.. H,♦j 'l`1y..`�r ,� f{'.. ��x'S��-�� 'r7�.�,.�� .,{%� ♦.��"��. ',/..,�• + ti�� '� �'F�e,�Mi . ��w,,,�� ,' '� �•.w .�firn` �{, � 1 '�4,�a��`t� V'�'��•" t+'i� �1'�: �� w,i' :=r1,'�j '"� �" x W+�w�/'� � ai � �' � ,�,��, �� " �_ � `_- �i.t .�r� . � �' I6 � .� � � S �11 }'� �. �r �F �. �r�� ^w1 t . � e �,� i'• � .v` _'`�%�;^ � w� � � . .:'s' ` �� .;.' 'i �r' ' ^ ", ( � �:w f�� - ,�, ��..`^'Q-"�'"---��,�V�M� � --e ;< � . •� `,� .�„T� .\ a•� � .� r � 4 ' `� 'y:� r,""�' 'r` '� ��,.�i"' -�""��.�..a. --�Y�"�,.� -!� ..�'.:�t ;�'!�', � .1�. �L d,*„ ,�i� �. ,f�lt. y �1 ,�� tx F.A,►.I' "'s�. ,,' �' is� , � �� T` , : ��.• �'�- � ,�� 1 �i •�-.' Jq' „�' �+.7i�� f[��`�% '�1'-��4�-- '�� i �r r, �,' S� ti.�- �',.•; � . i � �� t� r.-'��,� 1 N _yl .+ � :�'{R - ^� `�;,��x� :��t' :,��,,�rr��`I� {�,.� , � d�,:�� . �,��. . �' ��:�IF;1I�'�`' '�?��;��'; �I, .;V � - .�� -�^��tlf[�-,� �a�,. �j�, ;.t7N9��'', «� �T�� '�"�1 ~'��:�"�' ,�, �. ; i,, ,r ��"'.. :1�� -��' � � � .�t �-�' .�.:�,�� ,''�, �!1 � .4 1�\ ,1 � � � �. ��.� � `y��t^R .'� �,� '� �K �.�� E� �ls_� � � �'. ��.CS:t'n2a ,,.��, ,�,rA.11,,�,, +�l.. , �V J.� ,� �f F' �►;�1'� 1.' �,�'�Ir.�rl � ''r- . • �� :I►`:�'t ,'►J � j- . \.'�� ^ � .l� �� ' � �+_],,��_' � n� 4Nr� ,� � �"+ ."� ,� h p�''�p � �►;*4 �4';�.�+� r � !� �1 iP /�,.y�a ,]`�. ♦ i!r 'F @ �� i f ?' Y „�� S "r_ 'I�r. ! �'. _�� .�.i a. ��: t ! �j,.� r�- ,,= ,:` '�" -��+�,; ,�� '`` � � ��t��,�' , �� _"'��F��,`+� i r'[�t `� ��,. _-� ,�., t`� �� ,�� - ' "�'-, � ��i)��`�!�:��'� a�L -;�',.. 'n¢�o_x,�,�� }�. e.,�i7 �vl�� `� /�� -�1i"7,,-;�.�M ,/'' "� .,.t ��`��'� �\ �� •i�� ` - �.'�!.({� '..,�r\ �a- � � .� ¢ .��r � ��'S �`�✓�,� ./ � .�.r •� �.�f � y�y. ��'1�� 1 `:L�� r�i i•�+��? {!•�`\'�/r,�! �a.y ••\� •�� `� ��' �� ,� .111'� '-,�.�� . � ��J V,, �'s''r' ..�;N'� ,1 ,?"•S�'�,�'� V`�'s� �'\Y��. '� ��Y ''LI. :y i.�^ �f�� ,e � .,. 'jr`. l..a._ ..►»1 ��'�?:, y�*�,-i� �:-fI .e� � "4+�►. ��1"�4 1 Y7 , - �. � ��,h� -�ss�: ��.• te�� F. y` � r ,\��i�'� ��.�,� �,�� ,'.�rf�F�� '� �Q,��i�� -3 .a �.�� :-4�,�'v� �_;�'S:� `� � � .' i��,�}�� "��.��y'"` 7 ��. ''�� r; � ` � ij�"A��' _ ""` �s'f �,' ��. , . -. , � . , - �' .�t I ,��, , , tl . . . �� , i� . � �y . �"�„"� `��'tF,�� :�.,! '�l,sr'� '^ ` ��M„'� �?'"\. \` -`�!i�i'.. ,�'r� ' �.. � _.�,�I �. ! :� r� �iti �7��+�n'.Aa� � �.k�"��• . . � . + ' a '��*v\ `_ ,�-;l�4� , ��'�'. ,7tt:'s. �� l y�1 '� :.�i� i?'`? `� _ ��r��/ �y�� •�:�� _ � � �� ,.} �" Is. .»�; �.`�' z - � �!� • + -� �1Fp.k � _ . ` � i.'';`�iF' ��'.ir �1a� 3w •M 'j r��{�q�� ' �� _ \' �� +'ti��ir�� %�',' ,t ;�i ��;�w�, � r�� .� }� �'ol'� /' � k�, . v� ; �'-#6:�.�'�� r��'�� . �.��k�ind'�' '_. \ , ! ? '�,! � _�- ' � �- �'' , � i�' .i �s,!i � � ��e •;._ , �• • .�Q� � �'�''f..o , � \��`� \ ' ��6t, •' � ` '.b� j ' �iF . .\ � ,�.-.. ��jy��' „ l�s �I's, � }, `: �!!� -.ii, r 2e '1 e�' �v�-' �► •-�s, �`'. � '. �� ` t�' ,�!� 1�� Y��,�y�?t:.? ��_i1s',/� .�� _ �_ ♦ . , ; + � tG Y�o�� '' ii ii �t _ - ��;"�..��Al \� ��-1��.\� �. � f/I��I.� � �,'T�'�,.,�,/i�' , �'3��'a�' � p� . � � 1� �� : � � ��1*�" ��r�� ^ '1 r•. �J.I � �4, ��• � + �: ,1n ��A '�r I �.. *i:R � . ��\ S� � i � sti �� ''�� . �?�� `��'f'T !��1'�1 . � ��1,��?�\1• ��r '.�� '� ti�� 4 �i/'. _ ��0.�y�� e� "� �q`�, t: ;�y P� �, ,+1�,�! I 3\. , _,.w' ' , ',,�.��'ay'� °:•s" R ��' �'l �a�� n, �'1��'f'��._� .�Q.r. ��r r•� .`^� + �'� ��'��,�-` 'Vi��- !',G j �1�✓'�<�_�+��;�,,,_ �:�r '`��••r A► �8 d .t�� `'s: -eb`� f _ �� .�'�e.�. '��f� ,�' `►�� ! -��}rJ;1�'�` �I'!�" :el,��-�'�; ,`�� ' � ..� _ � : 1� 1 `ei � ..-. �! �� ,�.�.y► `'i��i t� • Y ��` � F ' �.�• ♦ ,,� �,!.1 �'., ii ��. �,_.�..�r 1�,,;wy._ �M '��'� .`� `�,. .\.e�� 1� ,Y yti�, �t�-! •t �1�ta�'��' v7�A� ..� � ,,,,s � ��-�.. '/ ,��"l ��.`z � ii� �+" �i►�r� " 4., � � ,� - _ . � '��.��,"�4`r4- ',�tl� �ttiC"4' .'�' �r',�i ��.,.��`L .�.�,.;r�� ;'� ��"s... A��,� �w� ' '/ � 6: y,r-„_,.::;�;,4`�.� �i.�F: 2 �^+C•.;' � •j + S ;<` •t�A +., �� "��?';�� q*'. `� ' ,,.s�.- �,��r•�/ ��i� �F�� wi'r �;.3��^� � ��y�9�\., . 1�! >d, * i$�. .:tF4' '� �� .Ar�_ �.�' '.,, �• �� - -y� ��.f.. _ n: �j �4�� ,�y ' r,.� , t �M��-'�� /f \�� • �y,ei'``�'r1 ��r 'f'A�� a�` ',, x `� `�� .��' '' . . , . � ��p , a � i�� .I' -� s 1� +1�� '�j �, 4� , +.� � � _ . �. - - � - y� <�,�� . .�. ��-"� �, , ; ..,~�,r �� j � ;:v�'��""�- -a�:,,..• ..' '�,� �^ '�`� I� �I"" �.'l''("• '�idt �., ,ti�;. ��+�I�'"� �.'� � �' /I � � .. _ . � � � Y � � a�`ti ,- .r� •�,� �.�r_ a. ``„��►. i�'k - r 4 �,, "``�,� _,� . � ��'� �' , .�1 �� -x .,, . +�. �°`-s��,.�- "''�:F`i ��,� .y��'"' �� -ql�r' i� ..r .` v � �r '� �,'�- ,: �:sy�� j � � "r� � -_�"e* ,� "��:�"y.�� .��1�\'��"� �� - w ' ��* i y,� �� , _ - . . � � �-• .�a�l�'�+ . �F .�.�: : . � ��=� � �.` � 4 +��P � . ��,� � � . � ,� 1�. y�e��.� �-'1 � � � `�\' `��-5��'�.r"+ I', � ��. �`��"'1 � -- ..»� . .. ,,,. _ ,_ - , . ..r """�' ��. �:►�A�-� x ,�� y�A� ... �w¢vx �� . ; _ -• ., - w . .... , �--� � �� ," . ► : .,� _�� ,� _,,�-- " _ �.+r��. _ .:,.: ^ , � , — , . . . �,. , �„ , , . .� �„�,� __ ` ,�'� _ ^~� � � y ; . � � .. `� , _ _ _- _ _• , .�., . ._ ,�e= �� .�"� -� � -A - _ . _ _ � : �: a. _ _ , , :.:_ .: ,�"/' `w j iwc ! �� i -��- � �r t . ,�`'.� , , - �L,� _ -_ �t':� Y , r� . � • .., ,„.. _ �� .': .. �� _ ~� 1 �,�,� � ,� �.,, �,,. 4��""Mr � � ,g�� r \ J'�..'� � -�.�"� ��1� �� .��8 ""M .�;,�,; � ...,�►►��;� , . � •. , � .i� . � i � ti =.'r►� � i�t`� '�' , .` ,�� :✓��/�► .,� r r .. ;^.� ... . . .��:..�= � �� ' ..� . + ,..,. . ..��,�- - _ I. - ,,,h J�„�,'��'., �r � ,� } �� _ _,F ��_ a � � ,�� " �� ti�i� . r� ��' #�- a ,c. � , y�..; ! � � � ' . ....... M � ' r7�� :'��Y��Kr�� r }�lA1 � �.`j'I .. , j � .Is+4• ' R�.. �t . ,� � �'.,� "' �C /$ /'r�... jl � �"a �-j� � �� . � /,t.y' �. � r, �� ,� i+ �P �f' ��1f4� .'.� P ,�' ' ��1,,5 ,, ; �� . � .. � . � f � _.. .�Z.,��;i'S�'.'�� ,�`. ;� ?'" `,."-� t�K � �,'� 't' '��f �;� ,� e �• .t�y k ' � . �`,.h . _ - 1 . . ,�: � T..y � .. � �� rv4 � 1 4 I� r. � ..y . �� l� . , � t�Y' ;�F. � � , �� , ' zt 4 �� < i �; �4� �� ..r,�',", , �;{-��' � ��' y:� � � M� .��,�q�ftlY;�tr-J�� w ,t ly�r'!� 4 ��. � .�i. �(' ..fJ 'ne' fi i F i „' �s�'I) .;� r � � s� . - 1�.V;+y,I.y� '` �t,q ,7 -,��t% �1 �'t� � ' t �r�,<� ;�' r �')'� �+ t r�►• � �� h� �., a ,��``�!S�w ' '?� Y', 1 .' � ��. ��' ;�e.�. :�� .- � - . ` ,'�, �, � y�+' '1� � ,, ��. � ��taSM1.''� � � ,�"�` t .�a �'��. ,�� 1�` � r, • ��_w � • � , "'✓�i` �vy�� , �� 3.'; � i ��,; ,.., - r Y lr' � t',�.. � T' �r► . , �., r `t i'.; . ' ;'ik. "! +�. � � ' f � '� . ,q 9t t��r �.'�� i" r ,• .. ,�. � i ,, r z r �� _ •�" �� ,�r �^.� � �/� � , ^s tj� � rt�( �� ^ �1 +' r, �.. '� �f y p� �' �` .� `�" ,. .�^, ' .�. �y�.+r'�.. � i/� � i+�l�� _'1 r Yh.. `F�"��r�. 1,�,��.�t r,. � �'�:?Z,�i�, , s�� ;.r'r� � +�.s��"Y�� ' �i�I��"!�1'k: i� i 'ij1��,; �;�G�4' �.�,�jJi �i!��il�� • i �+y'.��y7�{, �t� � 1: .� , �-9 /� ' �� .'l �� i��`�i �5�a�� 1�]� N "...i 7"�, �' _� . �, . .. . . `'1 � ?f .. �,�y. �;T �:t'; A :;� r�t� Y ' �t.;�,� � ...,� � N�� 4 .. r ;� ` ; ` .i'1' . �� ,�� .. � y�. � �y��a �r.,�i� ��'� ��,.� .''r i1� '�`. � �?�� 'ti��r •s, » i � �;rb ''�� .,�/ � � �(�d' ql� ✓ . -�. ','., � l�" .� 1 .� � Y,; .i !, p.� � d r � Ij } ,� � �• .1l� ;: � ` � F �. � , j _F. .�•: .. ��t+ ._ -,L.::y. �'� ,� � ., -� ...... , ... .�,.:k ' � >�, QL�s. 1' I. � X A ��. _ ( }. � s,�:�-' f`;'f'' i�- - � �.�� ,'a. '� i� 0�' p� c.+°,� �r � . �� _ �` � + ,��. . ��.J ♦.M �I. T �,sY., � /� � k �, �� .� � � . � � ' , � r.r ,p,., pr� r'.� � {��. t � . n � � . �,. ,.� . �� . .: �_ �l_.�' � �: � �� F.��y��iK h � NY� �: �� ..��, kY,r�� k�� . �$�. Y !'� r'+:. � l ��.,.1"'-. . '; �S „a�.,'G��, �{t.:.. �� ~.,a� �� , `�� .. .,7i�,s"� . .,I .��+�,'/.�a •,,, .. ,� '.y� •�y� { �/ .'X.3t �� 'w �,n..-�, W� d,' 0 `'�'rt .,s . ,'y�" . . �i. � d ' '` '� h ,l � ✓� �� ;Y� .I M1i�i�r� �: .� '�. .� /�Y p.:4e'.- ..7% ..r�:�� , },,,�i .f �. '�!. ,s. ,�� ifv�:,, .,.�, `'"� 4�r�s . . . �. ',L�y��r ... � � �. �T. ��" �-�#" �"�� O�Y��P Y`,p f t�' ,� i'�� !� _ ��' r r.�.�,�jr yy'`'y�y � r. '�,�y�'*V�,4� A'� 3 7p�..f�'c��'�?��i `'�� !fLs�'r` :'G�'*� ��F�'�~��. v ' '�. ..7 �%�,/�/y„HTi y S��iy�c�t�,y�� 1$� ..l. ,?'` . fl7➢" { �. H . '. r � �} y + �� '.rt' F � /tf .�P'-� I � fL ri � / �. .`f/J{Y'te �2'�,�' /�. Y J1J�� fI �I�!�r� '/�"( �v �y � �. ,�`• ff� `b� a, M �. . . .=� . �.f+� . ��"I-'� "r":�"} ,L`b�� a �� '�� +'+,f'.�,"'s. FJr.� �,y '� .;�- � /'.�! ," d 5r'.� ;J ✓/,,,';�f�j r ,�� '�,fiy� '%� ''�� , �s.�� ,�,.:,�� . r.�,��.�r�' ^�,_ ��, �� !�`��' �'1. .�j� ,.� ,�!p.�.;;�;rr 9� � ��, ��,, f �:J�* �* >.y_A /�-'-w s ^f ti �.�- 3��.'�9rn .� ,., J�' �.. "�' ,,,.+�f y,��, 1 �iiE',, f i . �:�. �,,,��"-�'"L'�� °f, ;c i ''�.�� /„y��'b�,� .� �r`�' :,; x�•�v`,�,#��+ij��''�+`•''� r ��t �� p+��' �,- ,�!s•v,�, ;�:• ''Yr_ ,y,*^� . •�`� � -!:�„��•�}�',.�' ..1�'�3� 1 +� �� + '-`"�;*`;.d' �/�y'��.�-F�.; fi, �.G-�L'��,.�''!i�'� •�� tf� �,+�'��y:�y�(�C,{i`��:,a}d .r+�°�� i '�; ��` .��,i�2;�. .�+i. �i�f ' �:.- ' ': S ��` �;i'�-if� �z ,-"�'` • r�,-�� ;;�07„��«y.�i,j1'�� ""�� tpr �� y , ;. y ' -t _'', : = , , � � - { .� . ..-.,�" ..;� � , >yJ ��'�, . � r i�� fi� , � �.. ..W_,'7! _ Y ..iRT"'I ,��. '�',r'� �P'�,::f' �.f./.�'^?4"�a�y � T�� i'1,� �� . ';''., �#i -w � 'T"�'' s,.�M' �� +j n '� - � ' - . '�.� , :,,.� - yy�� ' , '�''��""'�. 4�`' °.�.^� 5;::�. 1 .a•�. �:,, ,�` . �,�t�. �•�y .... '4�. � y�. � �. �f �N�Y�•�A t . �� ° . ,� , .�� lf,a, �. y>�� .w�� A' . .. .. ' ::.,,,, '��+��wa.:�.�'� .,t;?'-'� 'af'q '+Y�F^�� r i i � ' . r - � , , � � � �a^.>� t',�� ",> q� »,�i � � �,. �� '��p .� � �'Y A )<, .!'�«�� +�� y.� j f n ' ' IT. ��j�, , j �� _�r � �.� �*„ � Q t;''�'� U � ��Q Y�� ;�"' ' y �"i��^ t �<,' � .�� ,�� ! �' '�r. �1 � rf f �� ' ��fi;,,d� �� .. �. � � b�,'i' �� . ��d � i�t �'�. . s . , < <, �1.��,. � �� ,� �� .:,� � � , �� , ��:� , ,, ;, ,,� ,. � �� n�� ;?r�. � r "+ �� .� �dIIV��9�"��p�M��l�� i J �ar�r G� ti � �� a ;a s � �M�i��',� 6 �� I I i� I, � '�.�,k �;> � � ` . ��''ar x � 6'�,� ��'a q'�� ' 4 a ,�i :.,U„ `' �: � e I� �' � x �w �'� '� �,�.:�` "��,��""�f'�«,=��j.�. < � L i<. p .5�� ,�'�'��'°'"�`� f 4�m.. Y��r`��'� ,�y,� �.�.a . y, ' . . �., : ...t . � - _, , � , ' ,n'w�,,,1..„ U'm k' M�tlC<,,..,., , �^,'i,di tr M '�Y y py y <, . .�� M Y.,. , �_, ' , , �. .. � w ax',:n.: , . .. . . ... . .. . . . . . � .�, . . . . . .. . . M ,. �. , .x ,,, .. , ,. .. .:�sa2,.,. ... . . . . . . . . . . . � ��L�lr�� '`�`��+'L�i �',�� r' �, �P- f��an� �, I � �Y � i s� � �. �� _i �" A , , � �• �.. � � � � `t� .� •'�►�� :%''��` =.:'�j a,� � �. ,��. ' � � � �� . .��j ' �, � � �" � �"� �� .,'y 1�'�1 �: _ ��'�.' _ _ w � n` �f � �; r ;,� �' � . � `- N� ' ,. '� ��.. '--.�, A��T "� ', r„ � � � � ` � � � , q .u.. ' 't+` �� ` ..�..�� `�^ ..,�"' � ��, 1 �� + �,' ; '` , •d' �" �� y+ ~ �,�� ,4 1.,� ` .,� �` t - �`�. p. `;, '" 7f '{�� !f ��y�.� ..� �� _ �' �. �� t� �� w' " � ` �� _ � � /, �� . - i . ' r� � �,. �l�jy� � '�!. '' �._ � `�ZI I �P.'J � .,,��, e ' '�f �y �" � ' �. �l � l...' .`'f!b,� `I/f,� � •'�M.�La�. �' r +�, . 'b't11�.. � 'p'�.'+�i �,�►,,j- `;;�! `�.� _ .�C. r ., � - +� ' . e � y �f -,� 'r��F � ��:.�,, �.: �s .�:° r xw �� \ � \ � �r� � � � ,�� '1 �jf� S�� .�' i � � 1�. ';'+, �+"' •� r •�'�7`►�� i j�h �" .�. �. � �.✓� _.-P� J� � �� ' �'1��(� . �'� �`�'gI'�I a '�� r- 1 �� .,- �J. _ " �� `� F ! � .� � ��"--� :i-�;�,\ �,A a ��-'� ��'�- '`y�• � �� r _` I� � „" r_ �1 ./ � "�il�"'.� 7 �i..y��;� :� �w y.=� s. � .r�i�,�. » �•�. s, :� � ,��,�. . � , . �. ., �; `�,��, , � � � �, {�, �� •p�� r ,: � � Y,..� � �'�. , •"��y 1�,'l, r n.�(M � `� .�"��lS. ;i� ��d��-r�yC: L".; -''� � ,� � -�''\�t��,U �, } �!'';� ti �' \ 1 �fi• r �' � ► i 4� '� � �t `�.�.! ��, , �'�� , �i�,�q,�� 1�� ` ,.�G ,� k '�( ��.'��l �:�'=y�`1��`.�- i•`�'\ t ��1� ��,"� `r. .__♦� . ..� �-._s��`i� . i ►_.�� ,. . , '�� .\\`;��3+-�.. �R' �a�� ' ��t' � y�/ t.- �- �'yy�.e �i q �e ,,;,r � ._�� ^ �A�.y,\, ``��' >-�,�-1�� .=� ��.'�4, � �'�� •�.��r�"-� ��I\ � � 2 / ��e t� � .� �ej�h' 1 � v� "�7 ;1��±„} �\77" �D'�{'yJ � �i" 1t..�y.� ��-�r� ^�rj � � g.x t.. .� ; �\ ��y + .•r,� ` t �. t , ' �+,� ��,�� ,j�� 'ti!'. ,- .�;�•�~i�a�i' '• �.}v'. �� i\w�� -�,��. �" �1` 1�"/ 11�� ,f��I � I.y. � �w� .�y.t}� a� � '�.�.. ��P�1� f� �,,.. � 4.� �.a �'A� �-`�,�, �'C."�1'�w �+�. �.o � � '��y��j.,�••!, k�\�'�G. � ♦�► �``��4. �� --,!' ��1� n�j � �� , � y��t ,� a:� '� �� R� � ' > .. � �. �`e�� 1 t�• � ��r ' .,��.t��-�� ,4,�' Z 1�� ';�.,,�.. � � _ � a�:'�= �� s �; �� , }.r,,;�•;� �+ _ •-��i1 ,`, � �" '�,r�„ - ��..��5',�'�t� `'� � K,,. . y ,f� � ; ' ,'�,,R,�'� ?t,r!„#; � ��', �.� :� a,�+ � ,ty'w. ,/: �\ L�,s t � +�: ' �` �,.'�` . 1,.t' ic •�, jr��d� ,j ,�' ��f� ` �P,'��:.�,i—': �•. �': ,- , � �� t,,�. .I �F . �•„� ry + �. /'�°'� t as� � K;Y.".��:.��r �t. �`t � i Y �. #.. . ° � = �..��) � . � � �_ .._ \.. r » ? ,� �. � � �a � �;��.� `� _ , . �., *� � .. Y �� - ,! ,� \ E � �' ,yG�� {�` �s''^ � . �. '�'' 4 v.{'. ''�f 4 . , �& -a.f�� N� ��1� �+��' ,�,�,�,w.f,�•'t,��.��,'1'�`Y '1 .�Q� ' �.� ; . .. ' " ' , �!' �' )j'4i ?'�' !�' t. `��:. �f` r. �' ' �'� ! .,� � ��Y � v' -_f � � ` � � • ' , . . � �'� s� '' ' ��^� �sc t' �', �� _��.__ �y i � � �-(� � �� - ' � !'c �"'� '- , �.g 5� � �,v. "� ' ,�� .. Yr�c .r`�,.� +� ��i�� % � ;. � f �C' �1 ��I�• ��.�, � ,;3 , r�'+a•+�'.�L` �y- �.``W�C'�4 �i/ •t� � r 1�.�� ft.'�` ".r�/�,� .a � r. {, v1�i �t A� �'�— •� .1�. v-Hii' .-1 �� '1 6� w }. ^� ��4y . `(t' 4 r .r3�.I';�Y"��1' �� y, i� 'v �.� � �ty �`-'��",Sci� �.. �'� _ �c'+ ��, ��(� \l `� 1 .� � �'�� 5��b�� '3� /�t . 1�� ( . 1 � 1. . . �. .��.. f:. � � � ..Y' �<+, . i � ` Y ` 7�, ` � '".�'� � �• - r , t r ry Ry.,, r r w c � *sU, 3 r � � y . - , � , - ?wj iy �.a !� r'� ... � , 7�I'� � �yi�rr�piT . � � ", . . ..�r� �� ' + �.�. �,'; �r� � � i . '' � i;� .. ��.�'•i�! � �. ,\ r i ♦ �k 1 , l .r � ;, . . ? r �.'." „. . � � � \ '�C . . . .- :� ., , f ` t ,:.. y " �j � ♦ . �. �• � f'�� "7 � �Ny-. .tO�"P r'✓ i� r v 4x � � �e� r � ��v �' '�'� ��: '�y ` I'�!o r � � ��r� ?��1,f,`,�l� 1yry4�'�`'��•b,`:��4'� �I��`��, � '�,� � �7� '� i V'� `,,, '_"'•�J�..)P�-��l!�Y�.:� � N��'� � � v 1'+� W�� }` \ �� 'F��. r �. 1�.�'.�{ .� , t,t�I. [� A ° �; ��;�rr.�.�� :1��f, � � �. t..�w Y '.�;,i� '/, .� �'�,'�. �� t� �.� . ��y, y`., { �� " 4lJ � �� 4 "�'�5� �1'� � ! �� *„ � � �,� Z��tfJ�. •� �" rU ;1��4�� h �y ��.� � ,� ) �.. �f ` '.��.�' �v t, ► � � l�. �,+ � � . ,�, ;�:^ �y,, `�� • t : ill� , i 1 �, �; . � ' � � .� �.Y,� �� 5 t .�µl, q 4 �i ,+I�4. 1'. '��' � � � K ,�'ti '�� . � � ` 1 t �±� � *� 11 r '�„ � �'t �.. � • t s� ' _ �..M�7 x �� w�.' ��'C � i4'{ "'� �/ y �r_�, ..r7 � . h r r�� sp t¢ ,�� 1..�'�� . �•, �/� ~' �,x►. 2��j�1 j,4.. { D � 1:��? ' � � �. .l (� � r� i� �F �� `,�' - 'j`j�* � ,� f' 1 ��jI . (y /y � . .hl ' •1 �� ( � � ). �`�;,� � �. 1 �{' 'll �� - �'`�� -��1� � � 1 � �'. e0. fA '�� - '� \�,' �► l .� � .: F� � t ; f. ,. ,, F ' l�, 9 �r � � ,j �k..: �'�l .x `7�, �4. '"' . •`t r + j� ' y �A , 'i` y,,�� n �. ,� �1° .--r��p.l� ,�c:f ! :�� j �. � ,:ij�� ; � , _ ,�//,, '` �1 � ��'I %�lf;`a ,Y�;,'I'. . �,�,'�( r ',��.L;�Z �'� �a. � � .��. �V�,- _ � ! � . � � �.,��`. ,4 i;, r �,'• , #",��• �` , �� , �!�� fY, �' ��,,,LL�r� ,.�� ,,�_ �� d�;, : ,��,• . q � ,�, f .� {� �� ry � � �, .._��, �' .,.. t� .1 �� i� ,.1� .k�\,�� a,l �1y r �� i� y! v� � ,�C ,� \�, �• � ..ab*� ' ��,r ��, �t ;..,,�� ,'� !r ' � �,�,,/ � � 'I � � �i� .�. �� v ( -�� `,f�� Y�'. �''t � � �i i `� P t , .� . ,.fp,- /��.r� .'��.' I� ✓ �I . �ii :L ..�. � I'• )_. TY `i�� ,,, 4 �. �. `��' �nr�l �♦ �� 1 , ' � '�� .) 1 � , 'r r •k ��- : �r � ,� . �i�- ;;�,* ", �,;y ', �, , � � -� ;f ` i � �' ;��.�" .� _ "t. :►i;;' �' � . `�"� . `� _ r.� , : ,'... ;;N_:; .:1� .. �� i, ..-.�.f i� . �, i,, i� � �l:.� . . . � Madsen Creek and Vicinity �_ :. _,-� r, . __, � , � f � , ,. �,� r , � ��d? � f,*' + s rytr � �. . } .�:�. . _ --.,r. s`. '�. . , , , s> y�� - '_' :�„ aF �..� q;'v' "�" ; � � -�t i. �_ ;. �? -.. i $ 4 a ' ,�'S�. r,,�'�► >�. a }, ��`4 �_� > � e� �, - �t4t'4" � mE a� s� °� t £ 7 "-j� �' • �`�'� � . . ,. ,� r . , R . _ � � � � -,__ ;,��, � ,�� ,r�' _�� . ., ,. F � �.� �' - ' . �` y .r � �� s• �t � -, a �- � �� f � .� . . . .«. �x c� �.. � .'�,: -, �:.� �'_, p _ � � . _ .'�� . .. �i��:� �""� s.�.. » ' - . . . � r :.' a � 4 w' � �:�` �% :� 'y"R , �r s . �� ' k ; � .._ __. .. ��.�' .�: "'s �� t s�, i`� '�*a ,. .�,- .y.� � ,�� , ,, .. x . . : -€ g,� e� .,Y � � �1' . 'lr ♦� �• . � ..A.. F �� yo w�" . ,ii�i. �. .�f � -��-� a :- � �S' � f- ,� . �'44:4 . : x ,: �} ' �'� �'�•�•� "�`�� .._._ _ .. . . ` � .. .. . � ., L ,� � � L ' * 7 ��h .. � - � _ .. , it . ��'`� fy :�.t �� _� ' r � :.. .,: . _. � ,�= ,�: � 4 �� . . � - . . � �_ � _ _- ..� � , . � • �� # .a� ,��-� ,� � 4��._ �.� ✓ �:�;�`'� .t'� ,� { �' � �= � . . � � � '�`'�"=, �'� � �� 'edar Ri ver �,� t .� . . �!�� '�;�'�Qry�so� � '�` . >, . _ , : , � < . , - .. _►.� � r �°� � � � - � s � _ �� ` ,. . , { �� E , . ,..,y .+Y � f 'r� ��:. . . � - � �('� . `T�` xi��. '� . '-- . ..�. , � `` f . .,� ��f j� � �,�. tt " . :�` � � = .a � � . " • � �y1 '.•'� je' x'�� :� i_. • '.�+ , . ��r s _ �� .. � �a t' ,il�.. . v � 6 . . .. . r: . . ,4, t� - . ��. _r� Y � _. ,- � �.: , ,. �,,� X.� �' . � �`� `} ; �_�-�� . ., � , . .� , � r� % �` � � , � - t� �r . _ _ ; . . ..rF . s�.�:.,, ; . .,� ,,.. +, � .+N. r 1� .�t ��.� :1¢. t`' �* �:�� .. � , • � . :. s , .9 A... - - ' � - .-� :� .. . _ _ _. .: � _.. �' � �� ' ' e. . ' *� ' �i � s � '��• ! ,� .'�___ .. .,.€ ,.. . . ' . `. ._. �<�_�._ e`. µ-' . 5�. � �. � i . �V • ��`�' . �'� ..'-' �• � . ��-��-'� �: ... ,. - f.?: .,, ,�.�% . . y.•. t- . `�. r. ' �� + . _ - ' .� � . , .. .. _ . f � �t;` .Ir ... . i vA • . '� � .�' i �� .;: - . =.. , ,. �. . .. .r_ �� f.. � -x� � � � � �. , r r• , «� :. . . �`'�- ''�`'� �-f '� � , , w.. . _ ,.. � . `� :� . ... a f ,��' �:�. ' ,` .a:...rt g�t:3i �:� y �< °� . sht- .}� e �r" . . .>.�`: �.- . � . i . 't'. ,� � �•�.y �� .. .:, : � (; :��. ;y�. ,.� '�� ` :� ,�:.• . . •.'�-' E- r. �: . . .7y � L -.'..d,,;• � �' ta � � . . 4 y� ♦ Y i .' „t � . . _� +_ .,.. . • ,� � , '-�; '� . t- � .. . � .- � z.�. f..^. ac��' 4" .:. .. �.`ap�. 4,,�i . : . , ; �` 4� • . . �x• _ °.�: - i�s' . . #'. . yA� '` J+` y;.:. F,.� �,K;. , .� T: S _ � � i. 1 ',�,:: . �k . . ��•� � y - . .�� . .. . . . � r + � �. ,.�-a�a, - ;.t : -�'.rr� �'yYz,�;_ , :.� �"E r.�.x � �.+. _ � �,'&r _ -�r � e 't`� • �"�� ;. .. '� ��, . + - . - • ,.�. ,. . ,.. , : y�,� -_- ..'..-`: 'J�� '�', .��i'=.:'_, ' ,.:-. . " �' ;... : ;.;� iL�g „;�.. ,�- �► .r�� , {� << <+" �i.. a : ,�,s•''R,�.w. ra. ... ..�- , r.R � .,':: . • �`,^.'a�,,.,. ii-. y . �.�� +�� - � -'�+ �• ' . �� l!- y,l�, .. _ �� -� . :� � � � . •t.�_ ~�� -+�"-' �_',��"� ��'� •, �" " .,,�s� �� , _.� ,. '' � . '' �. .€ - - ,,. .�� - ��r� .¢'� � .#� _ . _ � - ,. .,._ . . _ ,�� - � � _ � , ,s , _ ,� . � �� _� ; _ �, v �� +:,� �� f= � �� r . , : ; ,. . ,. . . , C' � �`��`,� - � � �� '� ,.. .- � . _ �, � -� f �;_ r.�; �- � • ��` ,.�. �, �. y�,",�t^ .� � -' '�a:s '.: ' ' � �� _ t ,� �. �i ��' , .�.� �` <• ,.._. � . . -• � . . ... . �+"•=�. " i �;+- `� � ` �' � .':'.� r �;: � ,� r : � ��i �,'t -•�� a � • ` �: �». - -.,:� .:,,f � _ `' .� - - � . �4-a x,:--. . .R_..s..< � �: -�'. " i� �� _ r .�.. . ' � • ' .. „ t . _ ,. • �� . .,, , :. . . . . . ' .:t. �;'.. i e.t t .�Yf�,,.. � � �� . �,. '- s i . . . .4� _ . � _ <. . ��..., 1 '�"'�� ' � .; .� .. � - '� . } �Y�f' - �. . ..� , y . . ,. • . , . _: , -: . ;Y _ , � �3 �+ - :, �� : : � 7 �, ' ,• `•� _ ��w' ,y. � . . ,. � �'e.. �. � g � '�'�pT 4 ai�' ��`� �" � �'.�.� ti�'�` �" _,.. tl �`� . . , � ag�`' �.'. - ,�.-�r��= __ ��'. �' � . .;�� .: ��,� �,i.� ��, .. '' _�,�.. "�`: ��^' � �t .��' �� v."i�•, - � t ; � �� _�� . , � . r �. � , - - � .. � _ . . �� . _�,; r ;� � �, �`�-�{ �. � Renton � :� :'� �;- > .�- � - �� .,f ,• �� , � �• �er y�"' y. - ` � �� .1�6.f'� 1�� > Oti. �` r' 1 t�.. f� �� F � �' .P '� .S '� � � ' �`'~ _ � � � %`'F r;r r�r a- • ', �.� "� � � i -�,.,,��l� ` .` I * d�� ' . .�, y .- . -r�► }3 '!� ��, � ��= .�� ` j■' .{�'"'.. - _ _ .. . _'1 e�l ' �'.,a_: II�/ s. 'tr-I�� :. � r��.� ... �� I ! � . '� �... . �� J[, i_: � ".. y4 ^�.. '� " I'� `�a I . .-' ��' �` _. �.a. � �za�r__ � � ,.t y ,.� �� :, "' ,Fr. �'� '� , , „ i � �� . _ � •- . � -��x � �� . , _ , . , �� i " _ ' c ��:'kf �. � , m . , , +� z � , . -. _ , . '., �� " "! •�'� •� � � .. ' �' � . T � • - • ` y � • , , - e ,- - �`"',� �-f-"'�` •�;: '�"�w,�; � ��,� �t � t . r � , . i_ . , .� � � - �t' . , . � �,,,. � .� _ � �t -. - - -- , . < �. � . - - .. - � �r- . ; � -.. ., � �..�:; � � � �'�' � ��-, �-�" - - ,�` � - 3+r►�,*�: ��,,,,�., t ��' � - ,-� � �' ' � � f _ � '� f r �, � � �. � Y_ .� ��- _ .-�s� "�_ T':. �;�� r r�� r * r . F , _ . � �t � , a , r ,� .�_,�. . ' � r � z >.�+E"g ��r�.,.,,�,..,��- � �� .� ,� � K� �,� �r�� . , Y � � .. _ n , .� . 1`z.� , '�� •�4 •'z , � ,; : - � �� t� � �`� � �� i _ ,, . - .. . 'i� � � �i, '° � � :: �-- ,. ��, �: ��T •,. � ; . n ��.t �_ ` •i"� �_ • � . , . � .- . , . ,,.:.. . _ # .. �r ' . � �.. ,k `� � µ ~ ��-� ,'� . . . � . t ' ' �y. + .�.�.. ' . _ . .,�..�.1'�� '�` � o�*� - .�;�.. r '� ! -*,:� . �' �:'. $? . ;. ., •� > . �.� �� Y. .. . . � � -� � '-� " r . -,�: , '' ;�'' �_ = � �, .� • -�•�.�:::� ,� �� .i! s E� �� . � .� , -� . �. . � : _ .. � � � � r' .� , : - : . � �, � __ , - _ _ � , � � � r�, c ,�, � � p� ��` �^ � - � �' � } � ' $ 5`� ;.� ` . ~- - ..' ." . '!' . �r�� t�F� ��^. . � ��{ � '�. � .. _ ' , _ , ; : .:� - `� mr,� . .. : . �. . . . - �, . . . itj -. ''�,� :'� . �'_.._ . � RJ�3��': -' -.. .i f2' R . ��. � a_ � . � _ �*' . . .. r�� / � � � . :} .,� :. . �� , �.� , , :. ` � _�� ' _ �' ��I _ . , + , '� � , �' �!�,�..,,_, -- � �..�..#- �" '.� y�:� �, � �:�� .. ./.�, �t,...,,� �� •,:� r-+' . �r _ M`: �'' _ '�. �' �� # t� ; • � �.. ,� ,. �� .�.�' • ,� ,�1��+F� �_�j -; �� s,� .. �� ' �z � � �� `i � �Y -� =s�� `{ ,-� - �-+ .� � � -�' •�a Y � � .. - �� '� � � .�� :� � � � � ,t � ,�;: � � � � ` ' � . t � � �� . ��... � �� ,� . :. . _ _ . . � r� . -. ; _ ; :l"��-� - r � r�„ � K� %+s:� �R �;�r � �✓s ,I �. ,� �-. '�` , , �, � : � _ - �. • : ,, -.� �� . , - ,r.., "+... `��. � ' �- � ..:, . - — • ,<. �. , � � _ �_*^ _ � �. , � � . t , ---,� _, �C12010Km Count - � `-:� . � 1f�"• '�� -f"i �-v _ e r-� •_ ',_ , ; . ' �'o _ , 55stt` . �*' f . . The information induded on this map has been compiled by Kir�Camty staf(from a variety of sources and is subject to change without notice.King County makes no representations or wamanties,express w implied,as to accuracy,completeness,timeliness.or rights t�the use of such mformation.This dowment is not intended fw use as a survey product.Krc'�g CouMy shap not be qabk for any general,spedal,ndirect,incidental,or consequential damages nchiding,bul not limited to,bst revenues or los[profits resulting from the use or misuse of the information contained on Uus map.My sale of this map or information on this map is Prd�ibited except by wrilten penrussion of King County. � KIr1g CoutYty �a�e:�u2o�o Source:Kln9��Y�-HY�o4►aDhic Y�fonnation(htlpJlwww.metrokc.gov/GISfiAAI�P) - � Madsen Creek and Vicinit y �� Y��'. .. � . - ��._ . . . � 9� .. �Y ' �� _ ' '�. �' w� ; � �' ��'�� -��7 � y i � "r `.. � ' . � X �.'+F � *� 6 ' ,JA'� /� � L�, 't . � �P � � I >� � '�� I� �. �C. --�r� _ '�CY . ' �. ".� ' r- �� " �� . �� i '-i..� :.:: ;��'.. "�r �,�,f��. .. '� �., �Y,.�: $e . `F f �t . Yi_�l �� . _ +. �+�. . ' S(�. J .�'�� . I�I 'Z'_. # -g�'�l.A_ � • � �.i� �/� �-'. . ? �� y_�� _ ' . .: . . Y !�� ` u . k. - �..L��?� 9/. � _ � i`. � '��i� • .".f f ' f ��+� �' ��. � ' .� a . , _ - . .-. �,. . N, �... , ti � w . i }. ._ � f ,x � . :�::��!(1M�� t`'�� . .,� �t . r � � � f `' ^ ��" 4 -'� �' ,�a� � _ i- � -a?^.�'� S- s �' �•- „�C' !' ��* �; �'�a _ . 'r�(s . . '_"� � __ . . ` , „_ . . � . � � f� ��. . . � .., ,. , .. . . . f �'i+ - ,;,� � �t � c .�'. � F � r}` �,« f" '"'; a:t 'r•�{ :, fi f- � , . .- : J. . � � � ...} x, _ . ,c ., - :. _ . ` . ., . , .- • ,: , _ r .: , . , . ,, �, . � _� . �:.. � � . - .� . � r : , ' .� . � _� _ ., � �#7� !h - ..` . ��,' ��.�� :��..``��r` .� !�'. .��... _.. ;.r,�.:�._ , ... ._ �.r � . . ��.l�� „�i. " r "1M1T i � �. ,. � f� .. , , �' ,s,� . � �. �� : � �x�.y 2 i wr £, � �.: .I' . _ .,. :. _, .J. F� y� .. ' . �. . _ ;` � � _ `�. ��. ' � . '�F• - t . . . �. � _, . _ ��.-� _� �x�l1 � y.. � •! � ! �� + ` Cedar RIt f , � � � �� '�'* ;,��` :�. � ,� -. . : • " ` � -�� - �i�, � s'��.' . �, �� _:."°� .��. .� �- y _ . � � , . .. _ � , : . � � � �� _��. '� �"`�i�, f� ! . �. . • .. A r. �;t_ � s� . _ y _ .� �} � � T�.a � � � _ . �yd�� - / � . � -y , .�.i.' ��,� ;��:'�t �,L .�i- � .�� =� Me b. . . ' �'�`� h .� � . +�' *� � � �� . "�: ".t�T^�f,..'- T � _�{ tr• �� 4 � - �>s �,� . . ' . ".�� ..� .4Yk �' �. r'�''4 1f�, '. . ._ + _ �+ ... . � ,'� �j�� : �� rp. -.r y ' .: �.� . - ff' ' t , � . . q'. �- x � ';. . ..� � " ..-�"._n .{ s...�,�k''kL' �� -f'• .�- � �� .}� �J ,��f`� ��, ;' ..,.-.. �� . .f�_ .Sj.�,�� - _ ' "" . , + a .�-c _ . ,� ` � , ,- � ., , - ,.., . ' _� s � � `� . . �' `� �`i ;: ; � . . �w: � ' ' ` ,�''' , ; . . , _ :. .� . � _ - '� � �� :,. f:�_ �,., �< -� �-� -' � �"-' �: �t� :��'� �`:�t ,,, ,� ' . � '"r ` � �� ,� � �� : �- - �'� "�. r._ ,�� . �� i - �f .�.; �.. 4 - r � � 'J� - '�� ., s , r _. � -c � � � .� _ . s� �x • _ , -� � � � ; - w �+ , . .x , ,- �f; �" .,y�t. � ,rv *�r' a�.� � 3"�� f�'�,�� t.,.�:k h. , � .�� ✓ � . _ , ... :. - - _ . .� ,,_ .. � . � ,:., �� _ _ . : � � " � .: � r" - � r�� . i . c�� ,� _ ' `'� ; . .,. ,_ ,: .s. , � _ � . ' _E „ ' ' � r� . , � � _ � _� ; :.. �>• �:� � � �. - a �� _ . , q ' 'rt'i` • � `-,� ` -yl� , � ._ . y , K .,`� •�� a�► � _:�� . . ..B „� ' . �• 4 � " ' � . � �� + :� , j{ T" . m . , _. ..�. �, �p s r.. a'�� . *r� "}f..f''�'� _ ��` . , .. t 3 �� f . , . �� N� . � ' - . ' -... t�- ��ti �t Y"i • _ ; . _ a , , , �'�� _ _ , ��r .� � '. . ,� - . : �'�;,� <` '�� `, � �� j. �R. � •� �.. �.� .'7'.'- e , .. y. . � � ` . � <_ �' ...' _ . r /� ' °� . . , �t.- ��E- . .�� ..y" ., .. -.�, t . �,�yL..�.. .� '�, . ' '.t / � f .k. `�.�-. �� " �' �' . �._ . fi � � �A �" � ��' . / ,�. , f � �e� .. �. � � . t_ �- ,: � y �, j `' ,rr 'Y '.,, ' �- � �. �}# �� , ��. - ��'- . � f, ` ' . �y f� . . .`� .. r ..i� `�.'f� . ..�.t� � �!� .. . a . '��' �t'�� . ��'F.. � ? ' � .� + � � ..��f�. -. ��t � . � � . �' , � ' ,'�� ; ,�f� ' �� - , �� - �!� � , y •'� . .' .- k t ��,�;, �� . � T r . ,e�' � <.,� � . >i'" �r.. . . .4. � , , . . -. � ,� � �'!'..� , ;__: '< •� [ ' �%�:•=.� '�� < . �." 1 rt, . ��.f i� . . � • .. �. . , a ` ,r . . �r� . > �. � � �'. , ,< ,v `�'�_ ... ► � �� t'_' . - .. , '�, r �- �. s "1F'"�'�. �^ �. . �, 1 '��" } � 'i�•,1r �-\ �� . �. �. .� � � �' '�' - � �_ � + - a,� _ �� .�":.:. � �#, .�, � � � _ Ij� �. . ,�.. � . . _ -v„ � {4 rx�' -4� "` - -:}.f ,� � . jjj � . .L�.x , ' ' f� ` '�� . - - � � � � �. ' � . Renton �;� - �, �,�,�:., � tF � ��'y �¢ .. _} . . 'jy, <_. ? ` i� .. .�.y {7 ��e fr ` ��r' � - ^ ,�`. � �t�, �' r�_ �e .� ' "s . � ( .t �� _� `3`_ :.d .�'�� . , . . . k � SE k�h�rprl r. 4,_ c:.' � j� '' 1 _�as�� `°I� �x . �� h ��A,�� l,:a� ��`� � • . � � � i - • . �� ` '' .1� � t . ._, r . . � -.,,� . - . � ,. �� ' � " �� > � ^� � _ .�� '� ~ ��I�� / �` f �'- �� R �.� . � � � ,�. � �'• � - .� � , _. �� r ,� � ! R:. �� , ... � y�. ` �y, : ,�, �`` . ~ .. �^� �''�, .. � � ?r � 4 . '�,• ' � �� -�r i } - � � � � �: ; f.. � _ + ` : ' ,z �,' ,r.� .. , � . �� ;: . _ . �i" .� � � _ «..,, _ � �� -- * {' � � � . . � '� �A � :M� , •. .. .:.ry..� .}��`. ��{�.'_ , 4�, ♦�� .a��!`�i '°� . � 9�,�' ` � ��'' " � ��'1 �� '``M, �+ _ . .�f�� E'sr"�" �" � - .�-=�`' ,< _i'��:�iit�� i. , ,� ►� ! � �: ` ��' ; ,:� �Et``_ `'f: �`,. • .7`" � �`� <�"� :,- � ��kjl► �.r ��- � 1e,+it�'��' r '�r` � ,1�': � ' . �� .'.- 'L�_ �--• '�_�. F `"` :- r+,� _ � _.. . . � ��a - � �� 4_.R� � �- ! �. ; ,�. � � �K � r�' �� tur, � ��" " � � 4i� �� - ° -. , ��• � ' � � F; �4 � �- �� r �.. �' � � r''� � �; ,.• . , - 3 -� � ��. � f, �: �..�� « ' �� 4�r '_ : ,. � . � { _ �� ,�..� � � �• �� .a., ��, � _ , ,, -�,E. . � � � �'`� ' s , . �. , ti,� P�� ,f . �� ; � . ;� ..� _�-� _ • _ � : , � . , , . , ,, r , _�, .. . � � , �� . , ; : < �. . - ! � .,.� : . . $ _ . �,. . � , ,� , - -� � � , . , _ . ,�a - , . „�,,�-, , . E _; y �� _ -",�� `_,' r4�.�r. _ , , . -�- ;� �"� � i �.,� � `''�. ? �� t` , , - ,.� ..,. `��. � � =z= � r � ��' �r � �. .. . � � `�� 4r. '. . . � Q . IA k4� '. .- � " , � ' � y��h�_ �� k-: . 3l� ' � Z . ''f �. "'7� � � - f � �� -� 6 f� �� .� f �i� ��:� b �R.� . � �� L ��, s :� :♦ '��t 4Y *�� 'R,� � � r.�, .�, • � f '�r �' � " '� ,_: �_'� ��I �_ �`_ a � � � � r� � : �j-�t _ _ , � �� r ,, ;�.y - .� f. �; �� .� � �J R _ � , � � ' �;{ -{ . � . �-: . � �� o� __,�F� _ ,�; � � ,: . ;' , - � �_ � _ � �� yJ � � i �� ; �•�� r �.. �`_ -� c ��' y � ` ' ` �� ._.. � �f . � #�' _ ��' �S�. � � ,% �{:d.'�'.,�'tx, �� 'Ir r �� S " �� .�� .J ._ _ �., �'� r�_ , ��'�`:�: ,`�.f,t - . F . . � � ' ��,_'�►.+,+ .� � . .. ^ �#$�-��. r r . ._.;�, �, •, ,s '� �� ,�_ .„�� _ . �� —=�s.l�" _ f..� .,. `�'�'{.. � f `—�- ,�+ _� ��' � � ; _ � _ IC I IOtO Kmq CouMy�', ; '' � . _ � "'�' - -�p 556n` . � The informadon induded on this map has been wmpled by Kinp County staff from a variery of sources and is subject to change witnout notice.King County makes no representatiors or warranties,express or impYed,as to accvracy,completeness,timeliness,or rights to the use of such infortnation.This document is not i�tended for use as a survey producl.lCirg Co�ty I not be babk ior arry general,special,ndirec[,incidental,or consequential damages inGuding,but not limited to,lost revenues or bst profits resulting from the use or misuse of the intortnation coMained on Mis map.Any sale of this map or intormation on this map is prohibited except by wrip�en permission oi Kmp � King County nate:31u2o1 o sw,roe:IGng CouMy iMN'-Hydrog►avhic Ir�om,ation(http:�nwww.meaokc.gov/GISnAAAP) , !/ � �,Q!��.;�U'::i1'.�U"i .��. �� Of Re�t�� '�ty pivision November 6, 2009 ,�ti'an��ng J i-' Mr. Don Helling n��D Huitt Zollars, Inc. ��+� (��11 814 East Pike Street Seattle, Washington 98122-3893 Re: Preliminary Geotechnical Assessment Wonderland Estates Renton,Washington 1 7586-00 Dear pon: This letter presents our preliminary geotechnical assessment for the Wonderland Estates development located at 14645 SE Renton Maple Valley Rd. (Maple Valley Highway, Hwy 169) in Renton, Washington. It includes: ■ A summary of the general geology of the area, along with anticipated subsurface soil and groundwater conditions at the site; and ■ Our opinion regarding the suitability of the site soils for support of roadway pavement sections and buried utilities, stormwater infiltration, and other geotechnical elements of the proposed site improvements. A Vicinity Map (Figure 1), Site Geologic Map (Figure ?), and Soil Survey Map (Figure 3) iollo�v the text. THE SITE Wonderland Estates is located in western King County on the south side of SE Renton Maple Valley Road (SR 169) at 149th Avenue SE. It is approximately 900 feet (north-south) by 500 feet(east- west), covering an area of approximately 10 acres. It is a residential community generally consisting of asphalt-paved streets, mobile or modular homes situated on concrete pads, and associated green belts at the edges of the parcel. In general, the developed portion of the site is fairly flat, sloping slightly downward to the north, r�nging in surface elevation from about 1?0 feet at the south end to �,a.�,... :':asn„�r�n�3'L3-o��Z �ax 206.328 5581 �. �r,7�?:1 g�3,^ f� S/ Huitt Zollars, Inc. 17586-00 November 6, 2009 Page 2 100 feet at the north end near SR 169. There is an undeveloped hill in the extreme southwest corner of the site that slopes steeply upward toward the southwest. SITE GEOLOGY AND ANTICIPATED SUBSURFACE CONDITIONS We anticipate that the project area contains natural deposits from the ice sheets of the Vashon-age glaciation that generally include the following soil units, in descending order from the ground surface downward: ■ Glacial Drift in the southern portion of the site (References 1 and 2); ■ Glacial Till across most of the site (References 1 and 2); and ■ Advance Outwash Sand and Gravel beneath the Glacial Till (References 2 and 3). Glacial Drift. Glacial Drift generally consists of glacially overridden clay, sand, Glacial Till, or unconsolidated recessional deposits. Glacial Till. Glacial Till generally consists of dense to very dense sand and gravel in a silt matrix. It often includes cobbles and/or boulders. Advance Outwash. Advance Outwash generally consists of dense, glacially overridden clean to silry sand and can be locally gravelly. Logs of specific groundwater wells (Reference 3) on and adjacent to the Wonderland E�tate� ;ite correspond fairly well with the mapped geology of the area. Based on our review of this information along ��vith the ;eologic maps, �ve lnticipate that site soils generally consist of: ■ ,�pproxii��ately ? to � feet ot topsoil or soil fill; over ■ A variable thickness of dense to very dense Glacial Till across most of the site and clay, �,� ! gravel, or combinations thereof(Glacial Drift) in the southern portion of the site; over ■ Gravel (approximate depth to the top of the gravel in the well logs was about 16 feeti We generally expect that the natural soils described above are present at or very close to ti�t ground surface, although, at some locations, they may be overlain by a few or more feet of soii i� material (Urban Land}, depending on past construction and topographic modifications (Reference 4). ' t1 � Huitt Zollars, Inc. 17586-00 ��ovember 6, ?009 Page 3 Existing well logs indicate the site ground�vater level to be variable, bet�veen about �1 and 10 feet ,� below the ground surface ��ithin the Vashon glacial deposits. PRELIMINARY GEOTECHNICAL ASSESSMENT Pavements. We anticipate that the natural site soils would generally provide suitable support for pavement sections designed for light vehicular tra�c. It may be necessary, particularly in areas where the subgrade material is silty or clayey, to provide a soil drainage layer between the natural soil and the pavement section. Also, some densification or treatment of the natural subgrade soils may be necessary during construction. If fill soil is present at the pavement subgrade elevation, it may be possible to allow fill soils to remain in place beneath pavement sections after some densification. However, this would depend in �� ! ': Wonderland Estates improvements. For planning purposes, we expect that permanent slope� natur,,� ._,�_ ,,.. �. . : .. ;,.� �..; ,:, � � � . � ,� ,.. ,., .�,, . ; , �_ r:-,: .,.,�., _ . ,� ,� �.,� . flatter Buried Utilities. W'e generally ex�ect the natural site soi�� buried utilities. Suitable pipe bedding would be necessar� Use of On-Site Soils for Structural Fill. The suitability of e«.�..<<< �� ,� ��;, ,�� ,,� ,;. ;_�;��f,<«�� structural fill will depend upon the gradation and moisture content of the soil when it is p►aced. As the amount of fines (that portion passing the US No. 200 sieve) increases, the soil becomes increasingly sensitive to small changes in moisture content and adequate compaction becomes more difficult to achieve. Soil containing more than about 5 percent fines cannot be consistently compacted to a dense non-yielding condition when the water content is greater than about 2 percent above or below optimum. Reusable soil must also be free of organic and other deleterious material. We generally expect that the near-surface site soils, whether natural Glacial Till and Glacial Drift or Fill, will contain significantly more than 5 percent fines. As such, they will likely be moisture- sensitive. If these soils are wetter than optimum when excavated or construction occurs during wet weather, it will be difficult to compact these soils to a dense condition (e.g., beneath pavement sections or in utiliry trenches). � f/ �/ Huitt Zollars, Inc. 17586-00 November 6, 2009 Page 4 PRELIMINARY STORMWATER INFILTRATION ASSESSMENT The site is generally underlain by geologic units mapped as Vashon Glacial Till and Glacial Drift Glacial TiH and Glacial Drift generally contain a relatively high percentage of silty material. Soils with I�igh silt content are generally not considered suitable for stormwater infiltration. In addition, we expect that tl�e water table at the site is located within 4 to 10 feet of the ground surface. Based on this combination of a fairly shallow water table and the presence of soils with a high silt content, it is not likely that stormwater infiltration at the site �vould be feasible. However, because of the variable nature of glacial soils, areas consisting of relatively clean sand and gravel with the water table deeper than 5 feet may be present. If such conditions do exist, stormwater infiltration may be feasible. It will be important to complete a field exploration program to identify potential areas that may be suitable for storm�vater infiltration. LIMITATIONS OF THIS LETTER vote that this preliminary assessment is based on a brief site reconnaissance, and a review of published geologic information. As per our scope of work, we did not perform field explorations for this work. The information contained herein is preliminary in nature and should not be used for ' design. Srte-specific field explorations and a specific design study should be performed as part of i any final design work. ' Vb'e trust that the information contained herein meets your present needs. If you have any I� questions or we can be of further assistance, please call. I Sincerely, HART;CRO SER INC. KUNAL SHAH .�E REY AGN , PE � Sr. Staff Geotechnical Engineer Sr. Principal Geotechnical Engineer Attachments: Figure 1 - Vicinity Map I Figure 2 - Site Geologic Map � Figure 3 - Soil Survey Map �:;ohs`'�58600'•1Vonderland Estttes Preliininan Letter r,oc i REFERENCE' 1. Washington State Ue�artn�ent of �Aatural Kesources. ��Vashington Interactive Geologic �� accessed November 5, 2009 from Washington State Department of Natural Resources Wei. Site: http://wigm.dnr.wa.gov/ I� ?. Galster, R. W. and Laprande W.T. (1991) "Geology of Seattle, Washington, l lnited States of accessed hovember 5, 2009 from Department of Ecology Web Site: http://apps.ecv.wa.Qov/welllog(. 4. Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Survey (7/14/2009) accessed November 5, 2009 from Natural Resources Conservation Service Web Site: http://websoilsurvev.nres.usda.�ov/app/HomePa�e.htm Hart Crowser 17586-00 November 6,2009 � 1Sy\ 35 3/11Y QIVZgj a� c w � ti�O~ PLS� 1615'f AVE SE � ��p�' �S�d�zgT NZ9t �(r�S Wf�� N 16pSN �S Jf�f109r 'L `� 1�� "'_�s id�o�t �y�� P �,c'� N„� w � 35�3/1V F{LBST S�jf �� I��;{L6ST � ��rr� r � r 35 311V H185T W � b i� � f�Sr f AVE'SE � ,!''Cs` _ o � is��+ � �, ,� AVE SE 1561"H AVE SE 35 311t/ 19SI � vTs�a �,�? � 1547H AVE SE 4 -+�'s',�s p�'" � � J�r'�� Q�'�� ti��'��'s ��' ,�. ,�`c��p'C��(.^g4' .� •S �S 3nd HLSSi g 3N ld MOat1f:15 35 ld�si yi' �r �i�' v� ��0. ti� �'� pd' r" QUINCY-PL 5E `j'� Z ir� D AVE SE ,�P 35 ld aN��sr y � � QUINCY'�VE'NE �S 1d15TSI � -�lo, �i� zSi W t � OTH AVE SE -�� NE `�J 149TH PL SE S, �- �.yl' (�� 3N ld O�Sb'd �R�S�A�[� y�� 7� � 4, Sy S1 �i 3 �,,+ NILEIAVE•NE s i ", ' 148TH AVE SE � Jy Pv�,SE d`j 35�d H18tiT S',� � � � �� r`1 � � 14�jN"� � �_ . 14�TH AVE SE � �s 1 6/' /� � � .-.{KITSAP AVE NE � r,/J ),."1 14S;N AVE�SE � �� ' � � 3S 3/,1V,H1.9tiT � 3S 3/1t/H19bT �i�(,J � Q ``�° lAb�H AVE 3 � � v~it1�44 AVE SE �5�/1` tf EU S�T � �� `al�s ��s�b �r ., 143RD AVE SE « � mr '�J �,v �in AVE NE 142ND AVE S �1 � 142ND AVE 5E r 1q15T C-TrSF � � '� �' �� '9s�,� ;° ��Y �!6) ��b � [;; z s� re1ST�S � �� JQ% �S w �bj�sf� D��rdr �q 140TH AVE SE -�� r 140TH AVE"SE � w � � � � � \ .,D 1 3S ld H18Ei 3S 3�v HlObI �n � O ^ F- DUVAI�A V�F N E r ` I��.�,P' 0 v� i` 3S�3/1Y1 H18Ei W '� � � NE g R E M E R O T N P L N E 1 'P Q //d� �S)d N` Y�� \ ; � �� '�`�lf£I �o�tn � a � � u~i N �s�nv�-usi i � � d H 6Sr Z �; ./vWi w ,Z � VALSHONi L NE � D,Q � � �5 � 133RD PL SE '��'� a� � , Z � �'� Z UN10N AVE NE � � rv'�,Zi�,�- UNIO AVE SE �s S�o' �� o � w � w w U } �4i N ��lb �i�2F `f'W M � O � Z M �ZU}� PINEDR ,� �.p�� 3S1dH10 � I `n � ��' � ' • � �` REDMOND'PL N w C b'!. Q �"t / .� £T �� U �°��1 �J I�I"� Z m�j =� 129TH,,�CTi SE � � �n a Y � � 3_N 3�`d QNOWd321� vp,�Q�a �b.o, �O 1J .( f�128TH A1/E•SE � � � `_5--- � AIE NE ��' � � SJr �S�i�%�b�/ ` .__.._._. �H16I�SlI �5.�� n wc� N' • $ �l� � Y b p�`��ld -WP��-�SE 124hi PL�S �L��. v�i U � n��c'.,(►,o 0 1 r / M NE. �`�.� . 3nv r or �,..ti� o �W t / ��dy l �'\��S 3�b'FI1 b H1�Zt it�. �.---j'`12 " u� N��d t1NOW Z � �S��b�OaN k' �I J 7 1 �/� � �zT 35.3�b HJ.SZT � 123Rn CT � N OOMNN,�:1 y= � I `` �w KIRKLANDtC-T SE'r't��'T �, �� r 1 $ « J a-N `"' rc`�� " � �i`� 1215T AVE 5E '� s.3nd oa�i ) 35 4NZ� � � �Sa��d3( � � iNDEX PL NE N O�Py `� � `s +J 3S 3�b 15IZ.I_� � �_ � r C [ �� 120 AVE•5 0 t�C�� w ``u v�'i C�G� �\ � ��, �aO�C ��.- `° 119TH AVE.SE' � 1 � �' Z z � p �p,fiQ'� �y�� ti 1�18T�H AVE SE �iw 117T�F,1 AVE SE t�118TH AVE SI � G�j EDMONDS nVE NE �v n. �- �!i � � u� �c.� � EDMONDS VE SE 116�Jti.�VESE 116TH AVE SE � � w t T�_ -� NF q-�H'Pl.,`� z � pxp ,P:� � � � _.. � 3N ld'N�SN02if1 cn l�iu v °' C� M ��, io � w�N P�,•i � � � $`A1NE�T SE lNE AVE'SE 113TN AVE SEn v~i' ��"� 3N�d�132f7 OWj� ,Z" w�00 �S� ��BE DEEN CT SE H-1-�Sr3/1b I- `� ` �� N 3�d_f adb'J ` �^ N ' N��'bl �i� � � 111TH AVE SE Tt{P�SE � E 3N d/1l8 J:3SNf15 ��F . ,�C ' �g y�.�y 110 w `-1'TOTFI F� �Z� n � � �`��Y � I�1 �' t�n � �p `. -� ]O E�1 5 AVE 5 • �O � � �p 108 AVE SE N . �" Z`� -2` li1GH AvE S ��. � ,11 � N � Z � �6 �' GRANT AVE.S ,� �' � •� aMa'�oo�o09e9t� eo�9n� �va � � . Qgo (1go a9P� Q9P� -�tl�u'Kr i a r � �`i..�,`.' � QIS '�� r � t � � � a P.,��\gF \�v �'`��`- ��'FS �c/ R� m m � rr- v f � ��j� �` ��y. y � � - y.f - � r'( -� � 157 LN i � r `_ �'� - ,FN%ON.,yq `"a` �� A��,R p �� _ '� y ?� / �. �� ' �,A '! SF�53RQ� t69 �Z. � � e o y rji / i '� �, -- D S� o I Q90 `��J ;�, =o o f�; ~~�-� �� '�m '� q t 91 � ��_ �__� �; a',� e� o.� � �, � ° Project Sih ,�'' a � o � ,. `� _ � ��;' Qgt -=-;�._� .\�,I, Q9P� - J -�TH a�:�, � ,�. QIS Qgo Qgpc .,�. , � � : -- •-� Q� � � 5E 1592H PL� h�/ Soir�er. Base maP p►ePared irom Delortne Topo 7.0,2007;in Qy0 Gladal OUtWaSh 00f"�tl°^wkh Washk�g�°^Stat�Gedogical Informatlon Patal (httP:l/geobgyportal.dnr.we.gov). Q9P� Gladal Drift Wonderland Estates Qgt Giadal Ti�� Renton,washingc«, �� Qls Landslide Deposits N 3!h G�oto�k Map � ��se�oo t�io9 g 0 600 1200 a � F�� SCele Hl F@et 2 W ,�, . , . � �a. , � ,- �F. � t�1 �� +�� .; � � = � �l, "� , �: �,:- +�,y� y� t �` • • • i�• R ' * ,.Y' � R# �A' �� M.. � . � � �� r` t, #s Y s s as. '�.r e �!. ��4r� �-. , ., �..�; o> �r .� *� � . - �� . , � r + j�+�� ,`� �� II � � i . 1� � � �'^ + �,�., �{ �T� �r _ � � � :�� 4 �� ._ � i • � ��`"�fi � .�t�,�r.rR,y,'"I�„�� ''t`. „ ��' � �. ' � _ � ��' _ , . . �► r'� x � +� � � -, '� • � � ��,ti_r . . �� y,�� 'a 4�� , � _ '� ' - � �`a �, '�a� , __ `� _, � �r -�`z_ �'e'-�. �". � i� .. -'� .k� r i� � ' ��` , / � � ��- ` � �' � � _; ,r � . , ,.- �, ,. � � •. �,�` � �� ' ` ' ` t �i =•�•�a •• � t� • � . � 4i �� , _ - • 4�f� I - ♦� � ' � o � �� -� iR_. . -.. . � � _ �i �iv=' � T t _ s �� ! � y � t �� ♦ � •' � �.Sl,_, � �•�• ,�T �' �,.i z T' � f + 3� � + ; . �� .{ ' - . :fs •i �J''�'� r .. �^�. f � , � y�,�� '` A r` ,�'�.,�� ` � Project Slts�` ' ,� � J 6'� �� f. ` I '� F 4� / a .�. s �'� � � y� } r � � � ` � � i ��. f � ^• � . a � � I �� l'♦►� y �`��' � �� .�� r � I 1 - _+� . � . tr oI _.�� d � � i; �� _ �x�� 'F� } A � �� ,�*,�`� YI rJ��! � .. �,� � . +�`.�. �'�d „ `J � ' ' � ��• � , . � �� ' r � ��_ r �\ __ � _ � _ i �} ' .. . � � .. � `\ . _.. 1 .. ��r ♦ �.�� '�. • � .� i ��.. � . t; � .f � �k � Y . .`�'{ �� g ' 't.� ` '.. � ' * .r' d �� R." �" � y . t i � ' ��A _� -r , fc'. - ! . • ., � �� t �� '�'� � �� r . j�.J� � '. ��' �- , �T � � �-fi � ' ' ��- � i �-' ' ,Y� �.:r- ',..< .;v� � s� f i'S � t �. ��— �- � ��'�� _ Tar �� A �7'- �+ �;� - i► r t,,.�°'� . .- # + , .' . +'!� -� �`� � � �' ' s !.^ �. �_�` . ..jt.�i :�"� '. j.` i� i��A. �� ;:� �•, r �" _ �� '� ,� � £� '_ �� . ^�. �r ♦ � .. - ° ^` �� • � . ''E.r�, l � _. . �.eti" . 'a.�� -:�� `��.;� �� y,��'9 Uf 111'bafl L811d 3a�ne�: Base map prepersd trom sail map Croated by NaEural Resources Conservadon Service,Sept�nber 2009. Ng Newberg silt Loam (Alk,vh,m) w«,derland Estates Renton,Washinyton �' AkF Alderwood and Kitsap Soils(Baaal TiN) � Py Puyallup Fine Sandy Loam(ANuvium) N $oil Survty Map ' »sas�oo t uo9 � o aoo eoo i'i F�„►� � sca�e in Feec MeAl�Olor�'.�it 3 W �z � �� ,�._��.��.� ' ' � _ _ -- -- --. �___ . __ x�<;:7 asa qcs,'- ��e>.�,�r::�:+ � >c�.ar�E� h�t:�.. .: i:�,ua � .L-a.x�3 s3ik3p�tw.. ,TOs��:_s��a. .ta,iH:+�a+=,..,-. tw April 9, 2010 Vanessa Dolbee, Senior Planner CITY OF RENTON Renton C�ty Hall 1055 South Grady Way Renton, WA 98057-3232 Re: Wonderland Estates Utility Replacement LUA10-008, ECF, CAR Dear Vanessa, This letter is in response to your April 2, 2010 "On Hold" Notice letter in which the City of Renton suggests that Wonderland Estates look at altemative discharge locations. The "On Hold" notice was given in regard to the Wonderland Estates proposed rerouke of pumped low storm drainage flows to a swale westward along the Maple Valley Highway (SR 169) along the Pioneer Place development's frontage, then into "St�eam An, a tributary of the Cedar River that originates in wetland located south of the Pioneer Place development. "Stream A" on the north side of SR 169 flows between Ron Regis Park and the Maplewood Gold Course, eventually outFalling into the Cedar River. We do not concur that the proposed shift of the low flow storm drainage discharge would affect the "Stream A" area. We do acknowledge that pursuing this proposed drainage reroute further will likely result in delays that could jeopardize 2010 construction for this project. Therefore we are proposinu that the existinq storm drainacte pumo svstem discharae be kept ooeratinq as is. The two �xistinQ Wonderland Estates pump station structures will be reqlaced. The existina €�umqs will remain operatingin their cuRent confiqurations and iocations. The force main discharae aiaina will be reolaced with new qipinQ of the same diameters and at the same ocations. The remainder of this letter describes some of the advantages of the storm water management system that was proposed for Wonderland Estates and provides a written response to the City's April 2, 2010 letter. In our opinion the advantages of the storm water management system that was proposed for Wonderland Estates are: • Only pumped low storm water flows will be diverted from their current discharge locations to Madsen Creek via the swale system along SR 169. The increase in flow to be directed to the swa{e system along SR 169 and "Stream A" would be 0.6 cfs or less (42% of the site 2-year runoff rate}. Larger storm events that result in Madsen Creek overtopping its banks (at Wonderland Estates) would not be affected by the proposed low flow discharge rerouting. The storm water runoff from larger storm events currently J;U5�932�1 Worderland:states�02_CORRESPONDENCE�A'_Letters 8 Memo120�0 0409 renton hold resporse.doc � �� • �I �� '�__��.��`�� r.::�;° ;� _.:.:� ... :. ,.�:. :. - ,., ,;. - .,.., ., , ._, .,_. . drains un-attenuated from Wonderland Estates and flows toward "Stream A". This I proposal would not adverseiy change this condition. '� • Discharging low flow pumped storm drainage westward from Wonderland Estates into a swale adjacent to SR 169 would create an opportunity to provide water quality treatment to the flow. • A detention pond provided on fhe Wonderland Estates site would allow control of the 25- year runoff rate to a rate determined to not cause surcharge or flooding in the downstream system. The modeled flow limit would be 3.0 cfs. The detention pond would attenuate site storm water discharge to "Stream A" so that it would actually be at lower peak rates than the existing 4.52 cfs (for the 25-year event). The following are the City of Renton's comments {indented) with Wonderiand Estates' project responses following (in bold). i. As proposed, additional stormwater would be diverted from its currant drainage location of Madsen Creek into a new stream tributary identified in the provided TIR as "Stream A". Stream 'A' flows through the City's Ron Regis Park and eventually outfalls into the Cedar River. A Biological Impact Assessment Memo completed by the Watershed Company was provided in Appendix E of the TIR report. Within this Assessment, The Watershed Company indicates that no wetlands were observed along Stream A. The City believes this report is in error, because a wetland was identified in this area during the Cedar River Regional Park Master Plan process. The diversion of additional stormwater, to this wetland, may have adverse impact to the wetland hydrology. The additional stormwater runoff could result in an increase in the wetland size and/or value affectively increasing its buffer size and/or area. If the wetland changes in size and/or value it would have adverse impacts on the Cedar River Regional Park Master Plan and anticipated improvements for Ron Regis Park. Furthermore, the City has received grant funding for Ron Regis Park from the Recreation and Conservation Office (RCO) and the Federal Land and Water Conservation; these grant � funds require that particular improvements are made to the Park. Changes to the wetland or Stream 'A' may impact the City's ability to comply with the grant funding requirements. ' The January 12, 1993 wetland study may not reflect current conditions with ' regard to wetland configuration in this area. ln addition, please find enclosed an April 8, 2010 letter from our subconsultant, The Watershed Company, which further discusses this subject. J:115093201 Won9ertand Estates�02_CORRESPONDENCEAI_Let[ers 8 Memo�2010.0409 renloc hdd resD�se doc 2 _ _ �� ( � t?'�� 1`'4��,�? ' � 2. Additionally the City is working with potential FEMA funds to rehabilitate the Elliot Spawning channel that was damaged in the 2006 and 2009 Cedar River flooding events. The Elliot Spawning channel is located just downstream of point F of Stream 'A', as identified in the TIA. Any increase in Stream flows may affect the City's access to the site during construction as well a5 potentially impact the spawning channel itself. The proposed routing of low flow storm drainage discharge toward "Stream A" ��, would not increase flow to this area as in low flow situations the storm drainage I runoff from the south side of SR 169 is held in a detention facility located between SR 169 and the Cedar River Trail. No changes are proposed for high storm flow discharges from Wonderland Estates toward "Stream A" as the current condition is that Madsen Creek tops its banks and flows toward and through the Pioneer Place development and on toward "Stream A". The proposed drainage discharge changes at Wonderland Estates would route a significant portion of high storm flow discharge toward a swale along SR 169, instead of its current overflow path through Pioneer Place. This would not increase high flow peak discharge rates from Wonderland Estates. In addition, the City's April 2, 2010 letter presented the following City Stormwater Division questions and concerns. 1. The TIR states that discharging site runoff to the northwest corner of the site would alleviate flooding in Wonderland Estates and reduce some of the flooding potential in Lower Madsen Creek. The TIR does not quantify how much flooding would be reduced. It would seem that removing 3 cfs from the total tributary flow to Madsen Creek would have negligible improvement in#he amount of on site flooding. The storm drainage discharge and routing proposal provided for the removal of 0.6 cfs (not 3 cfs) of on-site runoff from discharge to Madsen Creek. There was no intention to "remove 3 cfs from the total tributary flow to Madsen Creek". We acknowledge that the decrease in flooding potential in Madsen Creek would be ' slight from rernoving 0.6 cfs from the discharge. The reduced flooding potential would be the result of routing the Wonderland Estates on-site storm drainage : , through a conveyance system that includes the proposed on-site detention pond ' ' and then discharging from the site into a defined swale along SR 169. 2. The Storm water Division is confused with Table 3.1 on page 13. Under existing conditions for the 25-yr storm, Wonderland Estates contributes 4.52 CFS. Is this ', because the pumps do not have enough capacity to pump the on site runoff to Madsen Creelc? What if the pumps were sized to discharge all the site runoff to Madsen Creek. J:�15093201 Wonderland Esta[es102_CORRESPONDEVCE�Ct_Letters d Alemo�2010.0409 renlon ho10 rasponse.doc 3 � _�� `11�,.` _ _ _ et,ai�r��:,ur_ .3t,er,.i oaY.r K,� . _ e , . . . , , , . What would be the amount of increased flooding that would occur at the northwest corner of the site? The existing condition 4.52 cfs 25-year discharge from Wonderland Estates discharges from the northwestern portion of the Wonderland site. During this event Madsen Creek is flooding onto the site (at an unknown rate) and the pumped rate of 0.6 cfs re-circulates back onto the site resulting in no net storm discharge flow into Madsen Creek {as occurred in January 2009 during a storm estimated to be between the 10 and 25-year event). If the pumps were sized to pump a higher rate, the discharge to the NW corner would still be 4.52 cfs, because the creek is flooding. 3. Why is the proposed flow for the 25-yr event 3 cfs for Wonderland Estates in Table 3.1? One would think the proposed flow should be 4.52 cfs + 3.0 cfs or 7.52 cfs, which is the capacity of the conveyance system of the proposed discharge route. The proposed 25-year discharge from Wonderland Estates is 3 cfs. This reduction from the current calculated 4.52 cfs is a result of a proposed control structure (detention pond and weir) at the northwest corner of the Wonder{and site that would limit the discharge to that rate. This was proposed in order to prevent flooding at a downstream chokepoirrt along SR 169 that was identified by the backwater analysis. 4. The Storm water Division doesn't understand how the existing water surface elevations for Stream A at points A, B, C, D, E and F are higher than the proposed conditions. The proposal to divert additional flow to Stream 'A' will add 3 cfs for the 25-yr event; therefore, the water surface elevations must increase correspondingly. Table 3.2 shows the 25-yr design flow of 10.33 cfs for existing conditions and 8.81 cfs for proposed conditions. How can this be when additional flow is being diverted to Stream 'A'? The proposal to divert discharge storm drainage from Wonderland Estates toward MStream A" would add 0.6 cfs during Iow flow events only. During high flow events Madsen Creek leaves its banks and all flows from Wonderland Estates fiows toward "Stream A". The reduction in water surface elevation during the 25- year event is the result of the proposed pond and weir at the northwest corner of the Wonderland Estates site that would control the discharge to 3.0 cfs (instead of letting the entire 4.52 cfs pass uncontrolled). The proposal would have limited the 25-year discharge to less than the current condition. 5. The project does not trigger flow control because the proposed improvements will not result in an increase in impervious surface; however, because Stream `A' is located in an J:N5093201 Wonderland Estate5W2 CAftRESPONDENCE101_Leqers d Memo12010.0409 r2nWn ho1C response,doc 4 .. • � �-�� ',��. ��: �� -_ _-__ --_ ___._ __ _. __ _ _ �__ tl�� ._t.�;_'":: � oist'—.3P.�=2- ` ,>;��!?_ `.�4 �-='�i �r�t . �ipH.�� >TCtp.]��3546:�,i � kvar�.-sit�.r�> area with erodible soiis, any increase in flow could result in erosion and subsequent degradation of water quality. To eliminate this condition, the proposal to divert flows would require that Stream 'A' be placed in a pipe all the way to the Cedar River. Constructing a pipe through a wetland is not allowed per City code. Code would require that the pipe be placed in an alignment that avoids the wetland. P{acing Stream `A' in a pipe would change the hydrology of the wetland by reducing the volume of tributary runoff and would require an analysis determine any impacts and appropriate mitigation. Finally, constructing the pipe near a sensitive area would involve federal, state and local permits. The proposal will not increase flows to"Stream A"during erosive events. The ' additions to flow are at the low range of flows up to 0.6 cfs or 42% of the 2-year runoff rate. This is not the range typically associated with erosive velocities. The higher(potentially erosive)flow rates would be reduced or unchanged from the existing condition. The City of Renton is appropriately concerned with the potential impacts of the project on the wetlands, on the park improvements, and on paric and FEMA funding for these important projects. The basis of the concem appears to be the purported "increase in Stream flows" that would result from the project. As described above, increases in Stream A flows are proposed to be limited to flows below 0.6 cfs or 42% of the 2-year runoff from Wonderland Estates. Higher flows up to the 25-year event were to be controlled to below current conditions. The City's April 2, 2010 letter suggests that Wonde�land Estates look at alternative discharge locations. Although we do not believe that the proposed shift of the low flow storm drainage discharge from being pumped directly into Madsen Creek to being discharged in a swale westward from the Wonderland site would affect the "Stream A" area, we acknowledge that pursuing this proposed drainage reroute further will likely result in delays that could jeopardize ' 2010 construction for this project. The revised Proiect Narrative, SEPA Checklist, Drainaqe and Site Plans, and Storm Drainape TIR will be submitted for review upan schedulinq an apaointment with vou to do so. We appreciate the City's attention in providing review of these � documents and assistance in removing the °on-hold" status of the project. Sincerely yours ', UI1T ZC3l. � , � _� . .. l. Don Helling, PE, LEED Consultant Project Man ger c: Hugh Watkinson, King Caunty Housing Authority J:\7509320t Wonderland Es:a:es'�02_CORRESPONDENCE�01 Letters 8 Memo12010_0409 renton hcld response dec 'rJ ��L . � _ S C I E N C E 8 D E S I G N L — _. j . ., s�=�". ._-_ WATERSHED -�� 4 - - � �� - � ; � _ _ �-x. �:� �� - �..OMI'ANY � � �-� : ; _ �_ `��- :� - ��-�. .. __... . - .. .. F� _ " April 8,2010 Don Helling Huitt-Zollazs, Inc. 814 E Pike Street , Seattle,WA 98122-3893 Re: Request for Additional Information Wonderland Estates Utility Replacement, LUA10-008, ECF, CAR The Watershed Company Reference Number:080801 Dear Mr.Helling: On Apri12,2010,you fonvarded a letter from the City of Renton titled, "On Hold Notice, Wonderland Estates Utility Replacement, LUA10-008, ECF, CAR"identifying additional areas of concern related to the stormwater redesign at Wonderland Estates. Section 1 of that letter specifies concerns with the March 4,2010 letter "Wonderland Estates Stormwater Diversion-Biological Impacts Assessment Memo" (Impact Assessment)written by The Watershed Company,which states, "no obvious wetland areas were observed aIong any portion of the lower segment of Stream A." This letter is intended to clarify that statement and its suggested conflict with a previous delineation(Delineation Report) conducted by The Watershed Company in 1993,which indicated that wetland conditions were present along Stream A at the time of the delineation. The previous delineation was conducted 17 years ago, prior to construction of Ron Regis Park, and should not be relied upon as accurately portraying the current wetland boundary. T'he science of wetland delineation has evolved significantly since 1993,including revisions to delineation manuals by the U.S.Army Corps of Engineers (Corps) and the Washington State Department of Ecology(Ecology), as has the landscape of the surrounding area. The Delineation Report indicated that the entire northem half of the park was wetland at the time of the delineation study. Much of that wetland area is undeniably still present and was referenced in the Impact Analysis. However,natural and man-made processes,including changes to the Cedar River floodplain, the development of Ron Regis Park and the continued urbanization of the surrounding landscape,have likely altered the extent of the wetland area, which currently appears to be smaller than in 1993. The Delineation Report explained, "The hydrology of the area is likely to be changing due to the activity of beavers. A dam has been constructed on Madsen Creek, creating a small pond, and recent activity is evident. Because of the presence of beavers, the location of the wetland boundary may change in the fuhire." 750 Sixth Stree�Souch : Kirkland,WA 98033 �425.&22.5242 � 425.827.8136 watershedco.com � R Response to Request for Additional Information � Don Helling,Huitt-Zollars Apri18,2010 Page 2 The ever-changing nature of wedand boundaries,particularly in highly urbanized environments where hydrology is significantly influenced by rapidly-fluctuating flood events is a primary reason that wetland delineations are typically not valid for more than five years. The Renton Municipal Code agrees with this premise,stating that wetland delineations within the city limits are valid for five years,unless the Administrator determines that conditions have changed. The Corps and Ecology have similar "five-year" rules. The purpose of my inspection and the subsequent memo was to address potential impacts from the proposed stormwater diversion, as they would pertain to amphibian and fish habitat. The Impact Assessment was not intended to serve as a formal wetland delineation report_ However Stream A is presently surrounded by an extensive Himalayan blackberry monoculture throughout most of its on-site length. Even though Himalayan blackberry can grow in wetlands, it is considered a facultative upland plant and rarely forms extensive monocultures over large portions of wetlands. Additionally,the intermittent nature of Stream A appears unlikely to provide significant enough hydrology to support a riverine wetland, meaning any wetland areas,if present,would be primarily supported by groundwater,not overbank flooding from Stream A. Therefore,while some small,isolated areas meeting wetland criteria may be located along Stream A,it is highly unlikely that any areas capable of providing significant amphibian habitat would be present in this area. T'he overall likelihood of the stormwater diversion contributing to an increase in the size of any potential wetland areas along Stream A or the large riparian wetland associated with Madsen Creek and the Cedar River,as suggested in Section 1,is relatively low. Increased levels of hydrology would only occur in Stream A during heavy storm events,which occur primarily during the winter dormant season. To satisfy�vetland criteria,wetland hydrology is required to be present during a significant portion of the growing season and must contribute to the formation of hydric soils and a hydrophytic plant community. Groundwater levels during the growing season would not increase as a result of the proposed stormwater diversion. Therefore,it is highly unlikely that hydric soils and hydrophytic vegetation,if present,would expand beyond their cunent locations. I hope this further explanation adequately addresses your concerns. Please call if you have any questions or if we can provide you with any additional information. Sincerely, Ryan Kahlo Ecologist - S PLANNING DIVISION ENVIRONMENTAL CHECK�tg�oent�on an��in City of Renton Planning Division ` 1055 South Grady Way-Renton, WA 98057 Phone:425-430-7200 Fax:425-430-7231 PURPOSE OF CHECKLIST: ��u��D The State Environmental Policy Act (SEPA), Chapter 43.21C RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An Environmental Impact Statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. INSTRUCTIONS FOR APPLICANTS: This environmental checklist asks you to describe some basic information about your proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or "does not apply". Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. USE OF CHECKLIST FOR NONPROJECT PROPOSALS: Complete this checklist for non-project proposals, even though questions may be answered "does not apply." IN ADDITION, complete the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). - 1 - 06/09 J:11 509 320 1 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Matenals105-Env Checklist- S EPA110.04.09.COR.S EPA.CHKLIST.doc For non-project actions (actions involving decisions on policies, plans and programs), the references in the checklist to the words "project," "applicant," and "property or site" should be read as "proposal," "proposer," and "affected geographic area," respectively. A. BACKGROUND 1. Name of proposed project, if applicable: Wonderland Estates Infrastructure lmprovements 2. Name of applicant: King County Housing Authority 3. Address and phone number of applicant and contact person: King County Housing Authority 600 Andover Park West, Tukwila, WA 98188 Contact Person Hugh Watkinson phone: (206J 574-1230 email: hughw@kcha.org 4. Date checklist prepared: February 1, 2010 5. Agency requesting checklist: City of Renton 6. Proposed timing or schedule (including phasing, if applicable): Anticipate project advertised for bid in April 2010. Construction beginning in May and continuing on through completion in October 2010. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. None identified. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. !. Preliminary Geotechnical Assessment, IVovember 06, 2008 !l. Geotechnical Report lll. Drainage Report !V. Environmental and Permitting Review Letter, November 11, 2009 -2- 06l09 J:\15093201 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Matenals105-Env Checklist- SEPA110.04.09.COR.SEPA.CHKLIST.doc , 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. No pending governmenta!approvals directly affecting the property have been identified. 10. List any governmental approvals or permits that will be needed for your proposal, if known. Critica!Areas Exemption—City of Renton Grade & Fill Permit—City of Renton 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. Wonderland Estates Mobile Home Park (ParkJ property is a 12.21 acre (531,867 SF)site in the City of Renton. The site was deve/oped as Wonderland Estates Mobile home Park in 1960-61. The project involves work associated wirh replacing the existing utilities that currently serve the Park. . The project involves: . upgrade of storm drainage collection and conveyance system, • replacement of storm drainage pump stations, • replvicement of waier and sewer system, • providing additional fire hydrants on site, . replacing "dry"utilities in a joi»t trench • reconstruct on-site roadways The project is anticipated to slightly reduce the amount of impervious surface at the site and improve drainage conditions. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The Wonder/and Estates are located at 14645 S.E. Renton-Maple Valley Road, Renton, WA 98058. Sections 22 & 23 T23N-RSE, W.M. Most work performed as a part of the infrastructure improvements project will occur on priv-` ----' -- �:_ _ �_ �ffl'Ifp�� O;r.p �lr'�,rc �,Aryr'irP �''.1!O �'1�! nri,,/p �'1!'!'� Q'!.r'{-� �l�r . L7. LiYYIi��-: 1. EARTH a. General description of the site (circle one);f�f�a�)rolling, hilly, steep slopes, mountainous, other -3- 06/09 J:115093201 Wonderland Estate5104 PROJ DOCS109_ApplicationslCA-SP-ER Application MaterialslO�Env Checklist- SEPA110.04.09.COR.S EPA.CHKLIST.doc The project site is generally f/at/owlands in the Cedar River Valley. Park property to the south of the project site is a hill that slopes downward to rhe project site. The sreep slope is outside of the project limits. b. What is the steepest slope on the site (approximate percent slope?) No slopes greater than 10%have been identified within the limits of construction A 68�6 slope has been identified in the southwest part of the Park property outside of the project site; this steep slope area rs outside of construction limits for the project site. c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. The USDA Natura/ Resources Conservation Servrce has mapped Soils on the project site as predominant/y "Urban Land". The steep forested slopes in the southern portion of the Estates are mapped as Alderwood and Kitsap Soils, while the area on the flatter slopes surrounding the Estates is mapped as Newberg silt loam. The f/atter area of the Wonder/and Estates Area mapped us Urban Land is assumed to be Newberg silt loam based on the soi!map. d. Are there surfate indications �r historv nf !�nst�ble �oil5 in the immed�� vicinity? If so, describ Geo/ogic maps indica:_ - _ _ _ _, .___ _. -_ -._; y . . _..__ ,.. :�_ ; _� �.. . the site; these landslide deposit are outside of the projecr area. We did nor observe surface indications of unstable soils in the project site. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Grading work is proposed to facilitate the insta/lation of underground utilities, reconstruct on-site roadways, and enhance site storm drain and system. The following anticipated quantities of earth work for the proposed project. Amount Removed: 12,000 CY Amount Replaced: 11,850 CY f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. A Temporary Erosion ond Sedimenf Control Plan will be approved by the City prior to construction. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Approximately 6096 of the site is currently impervious; following completion of the infrastructure improvements at the site, approximately 60%of the site will be impervious. There will be a slight decrease in net impervious surface following completion of this project. -4- 06/09 J:11 509 320 1 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materials105-Env Checklist- S EPA\10.04.09.COR.SEPA.CHKLIST.doc h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: A Temporary Erosion and Sedimentation Control(TESC) P/an approved by the City of Renton will be implemented during construction of the proposed project. The Plan will incorporate B1ViP's per the King County Storm Water Management Manual. For further details please refer to the TESC p/an that is included as a part of the construction permit submittal. 2. AIR a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. During construction there wil/ be exhaust emissions from large construction equipment(trucks, excavators, bul/dozers, etc.) Dust may occur from utility trench excavation and backfi!!, and in the period prior to roadway paving. Following completion of the project, the project should not change existing emissrons. b. Are there any off-site sources of emission or odor that may affect your proposal? If so, generally describe. None that we are aware of. c. Proposed measures to reduce or control emissions or other impacts to air, if any: Construction dust will be controlled by requiring the contractor to cover or water down exposed dirt. 3. WATER a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site ' (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or II river it flows into. The Cedar River is across the SE Renton Maple Valley Road, approximately 800 feet north of the site. Madsen Creek, a City of Renton Mapped Class !!Salmonid Stream,flows out of an off-site ravine located south of rhe subject property. The stream flows into a City sedimenration pond /ocated immediately south of the Park's southern property line. This pond has two outlets; the origina! stream channe! and a high flow bypass channel built by King Counry. The original stream channel f/ows easrerly, and then gradually bends north, eventually bending west and parallel to SR 169. The channel flows across the front of the subject property for approximately 90 -5- 06/09 J:11 509 320 1 Wonderland Estate5104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materials105-Env Checklist- SEPA110.04.09.COR.SEPA.CHKLIST.doc feet before flowing north beneath SR 369 to its conffuence with rhe Cedar River. The high flow bypass channel flows paralle! to the easter» property line, � separated from the Park property by a 6erm with a gravel road on rop. I I 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. The project will not require work within 200 feet of the Cedar River. Small components of the northern and southern ends of the site are within 200 feet of Madsen Creek. Work wirhin 200 feet will involve tasks associated with underground utility repJacement and surface restoration. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. No fill or dredge materia/ will be placed in or removed from surface water or wedands as part of this proposal. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. The project wil!not require surface water withdrawals or diversions. 5) Does the proposal lie within a 100-year flood plain? If so, note location on the site plan. A sanitary sewer pipe connection to the existing public sewer manhole will occur within the 100 year floodplain (F/RM, Map IVumber 53033C0984K, No Effecfive Date). The two existing storm drain pump station discharge pipes will be rep/aced with rhe same diameter pipelines at existing/ocation. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. The infrastructure improvements at the site do not include plans to discharge waste materials to surface waters. b. Ground Water: 1) Will ground water ae withdrawn, ar �vill water be discharged to grou Give general description, purpose, and approximate quantities if known It is anticipated that trench dewatering wil! occur during construction in order rc facilitate safe trench excavation and appropriate trench backfill and compaction. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.). Describe the general -6- 06/09 J:\15093201 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materials105-Env Checklist- SEPA110.04.09.COR.SEPA.CHKLIST.doc size of the system, the number of such systems, the number of houses to be served (if applicabie), or the number of animats or humans the system(s) are expected to serve. None anticipated. c. Water Runoff(including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters, If so, describe. On-site storm water generally flows south to north/northwest towards the northwest corner of the site. The altered topography, due to construction of SR - 169 to the north and Pioneer P/ace to the west, has resulted in the need to pump storm water runoff from the site. Water courses in rhe area include Madsen Creek, a bypass channe! of Madsen Creek, and a roadside ditch/swale system that conveys road runoff to the west a/ong the south side of SR 169. The existing on-site drainage system collects stormwater runoff by gravity flow in a pipe network and pumps low flows to Madsen Creek at two locations. The project proposes to maintain the current drainage configuration to discharge to the swale leading to Stream A. Regrading in the northwest corner of the site wil/be used to create storm water storage volume and reduce the potentia/ of on-site flooding. 2) Could waste material enter ground or surface waters? If so, generally describe. Trench dewatering runoff during construction will be filtered prior ro release from the site. Waste materials are not anticipated to enter ground or surface waters. 3) Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: The on-sire flow charocteristics will not be aliered, except for replacing sheet flow with pipe flow over a short distance. Regrading in the northwest corner of the site will increase the storage vo/ume and contro/ the impact of srormwater runoff on-site and off-site. 4. PLANTS a. Check or circle types of vegetation found on the site: X deciduous tree: alder, maple, aspen, other X evergreen tree:fir, cedar, pine, other X shrubs X grass pasture crop or grain X wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other water plants: water lily, eel grass, milfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? No vegetation is planned for removal. -7- 06/09 J:11 509 320 1 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materials105-Env Chedclist- S EPA110.04.09.COR.S EPA.CHKLIST.doc � c. List threatened or endangered species known to be on or near the site. No known or rhreatened endangered species at the sire. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Exisring landscape disturbed by trench will be restored in-kind. 5. ANIMALS a. Circle any birds and animals, which have been observed on or near the site or are known to be on or near the site: Birds: hawk, heron, eagle, songbirds, the X Mammals dee bear, elk, beaver, the X Fish: bass almo trout, herring, shellfish, the X b. List any threatened or endangered species known to be on or near the site. Priority Habitats and Species (PHS) data from the Washington Department of Fish and Wildlife (WDFW) has not been ordered or reviewed for this project. Salmonid fish use Madsen Creek and possibly inhabit portions of the high flow bypass channel temporarily during flooding events. No evidence of endangered, threatened, candidate,sensitive monitor, or priority species was noted during the site visit; however, coho salmon and cutthroar trout which use Madsen Creek are state priority species and steelhead,federally listed as threatened, are shown as using Madsen Creek on King County's Known Freshwater Distribution of Steelhead Trout map, along with tabulated documentation (1994, Karen Walter, Muckleshoot Tribe). c. Is the site part of a migration route? If so, explain Migration routes have not been researched nor have any been identified. d. Proposed measures to preserve or enhance wildlife, if any: A hard surface tennis court/ocated adjacent to a wetland buffer in the sourhern part of the property will be removed decreasing impervious surface at the site. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. As a part of the project, electrical infrastructure will be upgraded and replaced. Natura/ gas is being considered for installarion at the site, pending cost feasibility. Domestic electrica! usage should remain the same as exisiing if natural gas is not installed on-site. Street light improvements proposed at the site are more energy efficient than existing lighting and should decrease energy usage. -s- os�os J:115093201 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materials\05-Env Chedclist- SEPA110.04.09.COR.SEPA.CHKLIST.doc b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. The project wil! have no affect on the potential use of solar energy by adjacent properties. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: Street light improvements proposed at the site are more energy efficient than existing lighting and should decrease energy usage. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. Environmenta/ health hazard risks are not expected as a result of this proposal. Potential health hazards not anticipaied could occur during construction as a result of equipment or human error (fue! spill), or by unanticipated conditions during trench excavation. 1.) Describe special emergency services that might be required. No special emergency services would be required as part of this proposal. Typica! emergency services required for medical emergencies would be provided by the City of Renton Fire Department. 2.) Proposed measures to reduce or control environmental health hazards, if any: No measures to reduce or contro! environmental health hazards are included in this proposal. b. Noise 1� Wf'ldt iy�t'� Di (1'Ui�e c'Xi�i if'i iiiC dl"e�t .^�� _.� i`1,3'�� d`1�_'C; ��i ��"JjCC_� Ji` example: traffic, equipment, operation, c:rr��_�r, ' No existing noise should affect the projec� 2) What types and levels of noise would .�._ _ .",_�. .�, ,. � . �_. .. , . . project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. During construction activities, there would be iemporary noise levels near the active construciion orea where the infrastructure insta/lation is occurring. Construction hours wil!be limited to 7:30 a.m and 8:00 p.m. Fo!lowing construction, no new sources of noise are like/y to be generated by rhe proposed improvements. -s- os�os J:11 50 9 3 2 01 Wondertand Estates104_PROJ DOCS�09_ApplicationslCA-SP-ER ApplicaGon Materia15105-Env Checklist- SEPA110.04.09.COR.S EPA.CHKLIST.doc 3) Proposed measures to reduce or control noise impacts, if any: None proposed. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? The site has been previously developed ro accommodate rhe use of Manufactured Homes. The project site abuts two different tracts of/and a/ong the western boundary. One of the sites immediately to the west of the site has been p/atted as a detached single family dwelling subdivision. The second parcel is located near the southwest corner of the Park; this tract is a forested undeveloped tract of land with a zoning designation of Resource Conservation. The project site abuts two different trocrs of land along rhe eastern boundary. The smaller property along the north east boundary is a single family detached dwelling unit. The larger tract abutting the property on the east is an institutional use (religious campusJ. b. Has the site been used for agriculture? If so, describe. The parcel is used for single family dwelling purposes, it was developed as a residential manufacture home park in 1960/1; the use of this land prior to 1960 is unknown. c. Describe any structures on the site. • 108 mobile home lots (approx. 70°rb ful/at this time) • 1 office and recreationa!hall building • I laundry room building (to be removed as a part of this projectJ • 1 storage/tool shed • RV parking area • Forest area w/drainage pond • Internal roods d. Will any structures be demolished? If so, what? The laundry room facility on site will be removed. e. What is the current zoning classification of the site? RMH—Residential Manufactured Homes and RC—Resource Conservation f. What is the current comprehensive plan designation of the site? � RMD—Residential Medium Density - 10- 06/09 J:11 50 9 3 2 01 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Matena15105-Env Checklist- SEPA110.04.09.COR.SEPA.CHKLIST.doc I g. If applicable, what is the current shoreline master program designation of the site? Not Applicab(e. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. A small part of the Park in the northeast corner is located wirhin the 100 year f/oodp/ain (FIRM, Map Number 53033C0984K, No Effective DoteJ. There is a Category lll wetland on the southern port of the Park, no work is planned within the wetland. Rep/acement of existing infrastructure is p/anned within the wetland buffer. It is assumed rhat steep slopes are on rhe Park property, but the steep slopes are outside of the project area i. Approximately how many people would reside or work in the completed project? There are 108 mobile home lots for seniors. The Manufactured Housing Community Preservationists, who manage the site, have indicated that the Average Househo/d Size at the Wonderland Estates is 1.3 persons per househo/d, therefore there are approximately 340 persons residing at the park. j. Approximately how many people would the completed project displace? The project will not displace people. k. Proposed measures to avoid or reduce displacement impacts, if any: No measures are planned. I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: No measures are planned. 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. , There are currentfy 108 low to moderate income mobile home lots for seniors (55+J at the site. This project will not affect the number of units the Park can ', facilitare. � b. Approximately how many units, if any, would be eliminated? Indicate whether � high, middle, or low-income housing. No units are planned to be eliminated with this project. ' - >> - osros ' J:11 509 320 1 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materia15105-Ern Checklist- I�I SEPA110.04.09.COR.SEPA.CHKLIST.doc � I c. Proposed measures to reduce or control housing impacts, if any: No measures to reduce impacts are required with this proposal. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed. No structures are proposed wirh this projecr. Street lights at the site will be the tallest component of the project. b. What views in the immediate vicinity would be altered or obstructed? No views are anricipared to be altered or obstructed as o result of the proposed action. c. Proposed measures to reduce or control aesthetic impacts, if any: No measures to reduce or control aesthetic impacts are planned with this proposal. 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? The existing street lights will be rep/aced with new energy efficient fixtures, operations will not vary from the existing street light system. b. Could light or glare from the finished project be a safety hazard or interfere with views? Light or g/are should not be a safety hazard on-site nor will it interfere with views. c. What existing off-site sources of light or glare may affect your proposal? No exisring off site sources of light or glare are anticipated to affect the proposed action. d. Proposed measures to reduce or control light and glare impacts, if any: Exterior lighting will be designed in accordance with applicable PSE and City of Renton standards and will be shie/ded and/or directed downward to minimize Iight and glare on adjacent properties. 12. RECREATION - �2- os�os J:115093201 Wonderland Estates104_PROJ DOCS\09_ApplicationslCA-SP-ER Application MaterialslOSEnv Checklist- SEPA110.04.09.COR.S EPA.CHKLIST.doc a. What designated and informal recreational opportunities are in the immediate vicinity? The Cedar River Trail and the Ron Regis Park and both /ocoted across the SE Renton Maple Valley Rd from the Park. b. Would the proposed project displace any existing recreational uses? If so, describe. The project will not displace any existing recreationa/uses. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: The project will not have an impact on the recreation facilities. 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any places or objects listed on, or proposed for, national state, or local preservation registers known to be on or next to the site? If so, generally describe. None of the manufactured homes at the Wonderland Estates are listed on the Washington Heritage Register (WHRJ or the national Register of Historic Places (NRHP). Additionally, no buildings at the park are listed on the King County historic landmarks list. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. There are no known historic, archeological, scientific, or cultural landmarks located on or odjacent to the site. c. Proposed measures to reduce or control impacts, if any: No measures are proposed with this proposal 14. TRANSPORTATION a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. Access to the site is from signalized intersecfion of SE Renton Maple Valley Road. Manufactured homes at the park are served by a series of private roads. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? There is a transit stop adjacent to the Wonderland Estates entrance, the Wonder/and Estates is served by two King County Metro Bus routes, RT 143 and RT 149. - 13- 06/09 J:115093201 Wonderiand Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materials\05-Env Checklist- SEPA110.04.09.COR.S EPA.CHKLIST.doc c. How many parking spaces would the completed project have? How many would the project eliminate? The Wonderland Estates presently contains a tota! of approximately 32 guest parking stalls. There are 12 RV parking stalls on the site. Each mobile home unit is allotted two off street parking stalls. The project wil!not eliminate any parking stalls. d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private? No new roads or streets are p/anned as a part of this proposal. The private roads within the Wonderland Estares are planned to be reconstructed and resurfaced as a part of this project. e. Will the project use (or occur in the immediate vicinity ofl water, rail, or air transportation? If so, generally describe. The project will not use water, rail, or air transportation. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. The project is not anticipated to generate any addirional traffic. g. Proposed measures to reduce or control transportation impacts, if any: No transportation impacts have been identified. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. The project will not result in an increased need for public services. The infrastructure improvements would improve the fire protection infrastructure at the sire. b. Proposed measures to reduce or control direct impacts on public services, if any. No measures are proposed with this project. 16. UTILITIES a. Circle utilities currently available at the site: e ectricit , natural ga water, re use servic , e ephon nitary sewe septic s , er. b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. - 14- 06/09 J:11 50 9 32 0 1 Wonderland Estates104 PROJ DOCS\09_ApplicationslCA-SP-ER Application Materials�05-Env Checklist- S EPA110.04.09.COR.S EPA.CHKLIST.doc This project involves replacement of existing water, sewer, storm drainage, electrical, and telephone infrastructure. Following comp/etion of infrastructure improvements, the private roads will be reconstructed and resurfaced. Urilities provided by the following . water and sewer—Cedar River Water and Sewer Disrrict • sform drainage—City of Renton • electrical-Puget Sound Energy • telephone- Qwest C. SIGNATURE I, the undersigned, declare under penalty of perjury under the laws of the State of Washington that to the best of my knowledge the above information is true, correct, and complete. It is understood that the lead agency may withdraw any declaration of non-significance that it might issue in reliance upon this checklist should there be any willful misrepresentation or willful lack of full disclosure on my part. Proponent Signature: Name Printed: Date: - 15- 06/09 I J:115093201 Wonderland Estates104 PROJ DOCS109_ApplicationslCA-SP-ER Application Materials\OS-Env Checklist- S EPA110.04.09.COR.S EPA.CHKLIST.doc D. SUPPLEMENTAL SHEETS FOR NONPROJECT ACTIONS (These sheets should only be used for actions involving decisions on policies, plans and ro rams. You do not need to fill out these sheets for ro'ect actions. Because these questions are very general, it may be helpful to read them in conjunction with the list of the elements of the environment. When answering these questions, be aware of the extent the proposal, or the types of activities likely to result from the proposal, would affect the item at a greater intensity or at a faster rate than if the proposal were not implemented. Respond briefly and in general terms. 1. How would the proposal be likely to increase discharge to water; emissions to air; production, storage, or release of toxic or hazardous substances; or production of noise? Proposed measures to avoid or reduce such increases are: 2. How would the proposal be likely to affect plants, animals, fish, or marine life? Proposed measures to protect or conserve plants, animals, fish, or marine life are: 3. How would the proposal be likely to deplete energy or natural resources? � Proposed measures to protect or conserve energy and natural resources are: 4. How would the proposal be likely to use or affect environmentally sensitive areas or I areas designated (or eligible or under study) for governmental protection; such as parks, wilderness, wild and scenic rivers, threatened or endangered species habitat, historic or cultural sites, wetlands, flood plains, or prime farmlands? Proposed measures to protect such resources or to avoid or reduce impacts are: 5. How would the proposal be likely to affect land and shoreline use, including whether it would allow or encourage land or shoreline uses incompatible with existing plans? - 16- 06i 09 J:11 509 320 1 Wonderland Estates104 PROJ DOCS�09 App cauors�,CA-SP-ER Aopiica:io�Matera'�s05-Env C�erkl�st- S EPA110.04.09.COR.S EPA.CHKLIST.doc e Proposed measures to avoid or reduce shoreline and land use impacts are: 6. How would the proposal be likely to increase demands on transportation or public services and utilities? Proposed measures to reduce or respond to such demand(s) are: 7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or requirements for the protection of the environment. SIGNATURE I, the undersigned, declare under penalty of perjury under the laws of the State of Washington that to the best of my knowledge the above information is true, correct, and complete. It is understood that the lead agency may withdraw any declaration of non-significance that it might issue in reliance upon this checklist should there be any , willful misrepresentation or will�t�l lack of full disclosure on my part. Proponent Signature: �ltY�� ' Name Printed: t—I��i L<<r'�-5�� ate: �' 1 Z t� - i 7- osros J:\15093201 Wonderiand Estates104_PROJ DOCS109_ApplicationslCA-SP-ER Application Materia15105-Env Checklist- S E PA110.04.09.C OR.S E PA.C H KLI ST.doc 1 Arneta J. Henninger I'� From: Kayren K. Kittrick ' Sent: Tuesday, February 23, 2010 3:50 PM � To: Neil R. Watts; Ameta J. Henninger ' Subject: RE: Wonderland Estates Drainage Review#1 Desirable, and ends with a net REDUCTION in impervious surface as they are reducing the pavement width on their roads and removing a tennis court. From: Neil R. Watts Sent: Tuesday, February 23, 2010 3:47 PM To: Kayren K. Kittrick; Arneta J. Henninger Subject: RE: Wonderland Estates Drainage Review #1 1990 manual—but only for the issue af the "changed"drainage course approval, and potential impacts to that downstream system. ! am sure Ron wants to apply the new manual, but it is not appropriate here. Overkill for a desirable maintenance project. From: Kayren K. Kittrick Sent: Tuesday, February 23, 2010 3:44 PM To: Neil R. Watts; Arneta J. Henninger Subject: RE: Wonderland Estates Drainage Review #1 Are we making the project subject to the City manual? They are vested to 1990 or 2005 depending on whether it was mapped as the project was accepted at the counter on February 8. From: Neil R. Watts Sent: Tuesday, February 23, 2010 3:40 PM To: Arneta J. Henninger Cc: Kayren K. Kittrick Subject: RE: Wonderland Estates Drainage Review #1 We tried, time to move on with Surface Water recommendations on this one. You may want to consider having Vanessa attend the meeting as well. Sorry for the additional excitement in�olved here. Community Services has others who are supportive of the project,so let me know if there are problems following the meeting and I will talk to the appropriate staff to get this moved forward. Thx! From: Arneta J. Henninger Sent: Tuesday, February 23, 2010 3:31 PM To: Neil R. Watts Cc: Kayren K. Kittrick Subject: FW: Wonderland Estates Drainage Review #1 Neil, I know we discussed this meeting with Leslie earlier but right now I do not have any other answers. Allen has made it clear that the applicant needs to demonstrate the advantages and how the parks Dept.will benefit from discharging ' project runoff into the proposed drainage course versus the current drainage course (Madsen Creek). Actually, I am not even sure if there is a natural drainage discharge location here. I quote from their TIR"....the natural discharge location is ambiguous, due to the alteration of the drainage pattern, especially due to the construction of SR 169, which presents a hydraulic barrier for all runoff and stream flow from the area to the south of the road." 1 ��/o,�/�� ,�� . �� : _ , _ -�,,��-� / _� �� __..� �G� �A�-��/��_- ��"i� — f � C 1 � ��/-,�{,i�� L1'^"s_ / � � � (/ / ��...-i+'�,��if. �;��' J � �� - —�o 0 0 Liz� ,�� z-� � 5�i��,.. .�'/ oz i?.�--.,. c�( �'� S�---�, �� , /v � c � ,-r �L'L%"� - _ • �� t,�,� �, �'-��;�1 `� � G��7��`G+��(�,,`~�� ',. �o �, r.r. ;J �r«i ,� � �_ s:-r.r �/i�'�' �L- � ls�` �` c� ,(/�-�/��r Llj'/� � �, �C, �/ ,r. ��,� � G►�� cz �:�.-„-..J G c,, '� �L- � � (;L� �? z ¢��^✓ i� , G� � � ��`�S, � .�� 1 �..� � .,��%�-�� ,�-- �� ,� ; ,� �%��''�'� L� -,'�` '''_r ��.�.� ��f .�. �(''"� � /� � � � /(i<-� �aD��.�� (f/ � � . _ � - �'';,�%%.'. / '"A, �. �� G�"G�/ !P` � .�-� C� �, ✓i ` �, � �r � DEPARTMENT OF COMMUNITY � � ��0� .�� AND ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: April 13, 2010 TO: Allen CC: Kayren Kittrick FROM: Arneta x7298 �` SUBJECT: WONDERLAND ESTATES STORM REPORT MAPLE VALLEY HWY. Attached are the storm reports and response letter on the above project. Vanessa delivered a set for you and a set for me. Please review. Thank you! i:`,.memo.doc HUfTT-ZqlARS.INC. . 814 E.Pike Sireet . s�roa.wn sein� . zoe.a�a.ssoo�� . zos.�e.�eeo� . huilt-zollers.com ento� C�ty �� p�vis�on ___...__ �,��nnin9 Memorandum ; ,� ��;�,� DATE: February 9, 2010 - Revised April 7, 2010 ��D TO: City of Renton �� FROM: Huitt-Zollars, Inc. for King County Housing Authority I SUBJECT: Project Narrative: Wonderland Estates Infrastructure Improvements — 14645 Renton Maple Valley Rd PROJECT NARRATIVE This project narrative has been put together for the Wonderland Estates Manufactured Home Park (for seniors) located within the City of Renton at 14645 SE Renton Maple Valley Road. � The scope of the project at Wonderland Estates involves upgrading/replacing and/or extending existing utilities, including storm drains and the reconstruction of existing asphalt cement , roadways. The project will create no net increase in impervious surface. �I Huitt-Zollars' consultant services have been retained by King County Housing Authority (owners of the Park) to provide civil engineering services to improve the Park's infrastructure, including improvements to on-site: o Sanitary sewer infrastructure (Coordinating with Cedar River Water and Sewer District) I'� o Water (Coordinating with Cedar River Water and Sewer District) I o Storm Drainage o Roadways o Electrical systems (primary, secondary, illumination) o Exploring feasibility of buried telephone, cable N, and natural gas BACKGROUND INFORMATION • Project Name - Wonderland Estates Infrastructure Improvements • Required Permits —(1) Environmental Review (2) Critical Areas Exemption • There is no proposed land use change in use at the project site. Zoning: J:115093201 Wonderland Estates104_PROJ DOCS109_ApplicationslCA-SP-ER Application Materials106-Project Narrative12010.04.07.Project.Narrative.doc -_—.. __._______..__._�_�v_.._-_-__.___� HUITT-ZOLLARS,MC. • 814 E.Pike Street . Seattle.WA 98172�893 • 206.324.5500 phone • 206.328.1880 fax • hum-zollars.com Subject Site: RMH; Residential Manufactured Home & RC; Resource Conservation East of Site: R-14; Residential 14 du/ac South of Site: Outside of Ciry Limits a small tract of land adjacent to the site is zoned R-14 Residential 14 du/ac West of Site: R-8; Residential 8du/ac& RC Resource Conservation North of Site: RC; Resource Conservation (across the SE Renton Maple Valley Road) • The project site is an 11.70 acre (509,720, square feet) tract of land located on the south ! side of SE Renton-Maple Valley Road. The site has been developed and used for manufactured homes since the early 1960's. The manufactured home park has I approximately 240,420 square feet of developed impervious surface area. No additional I impervious area will be added to the site as a result of the planned project. I . Access to the site is from a signalized intersection of the SE Renton Maple Valley Road. • A Category III Wetland has been identified in the southwest corner of the project site, adjacent to the forested steep slope area. Installation of buried utility infrastructure will occur within 5 feet of the wetland (reference wetland delineation flag C8). 1,680 square feet of asphalt in the wetland buffer will be repaved and 990 square feet of grind and overlay will occur in wetland buffer. o Information on critical areas on the site is documented in the attached Wonderland Estates Environmental and Permitting Review report. o The Preliminary Geotechnical Assessment has been attached to demonstrate soil conditions. • The drainage culvert located in the SE Renton-Maple Valley Road right of way adjacent to the northwest corner of the project site will be reinstalled at an appropriate flow direction and slope. � . Estimated quantities and of materials involved in excavation of export and import materials � is approximately 11,300 cubic yards. J:115093201 Wonderiand Estates104_PROJ DOCS109_ApplicationslCA-SP-ER Application Materials\06-Project Narrative�2010.04.07.Project.Narrative.doc HUITT-ZOLLARS.INC. • B14 E.Pice SUeet . Seatlle.WA 98122-3893 • 2C6324.5500 phone • 206328.1880(ax • hu¢t-tol�ars.com o No trees are scheduled to be removed as a part of the grading project . The contractor may choose to provide a temporary job shack on an existing mobile home pad. . Total Opinion of Probable Construction Cost: 3.5 million . Mobile homes shown on OTAK survey represent the units that were on-site in December 2009. Since the time of survey additional permits have been granted for mobile home units and subsequently these homes have or will be moving to the site. The Wonderland Estates Mobile Home Park at maximum capacity can accomodate108 units. , , . Each mobile home is allotted two (2) parking spaced. There are 32 off street guest parking spaces on the site. There are 12 RV parking spaces on the site. ATTACHED (02/09/10): Preliminary Geotechnical Assessment. November 6, 2009, Hart- Crowser Wonderland Estates Environmental and Permitting Review. Nov.11, 2009. Watershed Company J:115093201 Wonderland EstatesW4_PROJ DOCS109_ApplicationslCA-SP-ER Application Materials106-Project Narrative\2010.04.07.Project.Narrative.doc Arneta J. Henninger From: Allen Quynn Sent: Wednesday, March 31, 2010 10:15 AM To: Vanessa Dolbee Cc: Arneta J. Henninger Subject: Wonderiand Estates Proposed Discharge Review Hi Vanessa, Below are my comments on the Draft TIR dated March 16, 2010: 1. The TIR states that discharging site runoff to the northwest corner of the site would alleviate flooding in Wonderland Estates and reduce some of the flooding potential in Lower Madsen Creek. The TIR does not quantify how much flooding would be reduced. It would seem to me that removing 3 cfs from the total tributary flow to Madsen Creek would have negligible improvement in the amount of on site flooding. 2. I'm confused with Table 3.1 on page 13. Under existing conditions for the 25-yr storm,Wonderland Estates contributes 4.52 CFS. Is this because the pumps do not have enough capacity to pump the on site runoff to Madsen Creek? What if the pumps were sized to discharge all the site runoff to Madsen Creek. What would be the amount of increased flooding that would occur at the northest corner of the site? 3. Why is the proposed flow for the 25-yr event 3 cfs for Wonderland Estates in Table 3.1? I would think the proposed flow should be 4.52 cfs+3.0 cfs or 7.52 cfs which is the capacity of the conveyance system of the proposed discharge route. 4. I don't understand how the existing water surface elevations for Stream A at points A, B,C, D, E and F are higher than the proposed conditions. The proposal to divert additional flow to Stream A will add 3 cfs for the 25-yr event;therefore,the water surface elevations most increase correspondingly. Table 3.2 shows the 25-yr design flow of 8.81 cfs for existing conditions and 10.33 cfs for proposed conditions. How can this be when flow is being diverted from Madsen Creek? 5. Contrary to Appendix E of the report,Stream A actually flows through a wetland as delineated by the Parks Department. Diverting additional water to Stream A may have adverse impact to the wetland hydrology. 6. The project does not trigger flow control because the proposed improvements will not result in an increase in impervious surface; however, because Stream A is located in an area with erodible soils, any increase in flow could result in erosion and subsequent degradation of water quality. To eliminate this condition, the proposal to divert flows would require that stream A be placed in a pipe all the way to the Cedar River. Constructing a pipe through a wetland is not allowed per City code. Code would require that the pipe be placed in an alignment that avoids the wetland. Placing Stream A in a pipe would change the hydrology of the wetland by reducing the volume of tributary runoff and would require an analysis determine any impacts and appropriate mitigation. Finally, constructing the pipe near a sensitive area would involve federal, state and local permits. 7. The Surface Utility is working with FEMA funds to rehabilitate the Elliot Spawning Channel that was damaged in 2006 and 2009. The channel is located just downstream of Point F. Any increase in flows to Stream A may affect the City's access to the site during construction as well as any proposed water sources to the channel. Please call me if you have any questions. Allen Quynn, P.E. Project Manager City of Renton Surface Water Utility Engineer 425-430-7247 aquynn@rentanwa.�ov i DEPARTMENT OF COMMUNITIf � � ��0� ,�. AND ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: March 19, 2010 TO: . _._.. _ Ailen Quynn _ . _ Leslie Betlach CC: Kayren Kittrick Vanessa Dolbee FROM: Arneta x7298 � SUBIECT: WONDERLAND ESTATES STORM The engineer submitted the attached Storm Drainage report. At my request the engineer prepared the attached response letter. Please review and respond. Thank you! i i:�rnemo.doc Denis Law Cl� Of � Ma or �� r Y � . �._-".�. �' * �r A -► `� �. � � � `� � � r,�;`; Department of Community and Economic Development Alex Pietsch,Administrator March 8, 2010 Don Helling Huitt-Zollers 814 E Pike Street Seattle, WA 98122 SUBJECT: "On Hold" Notice Wonderland Estates Utility Replacement, LUA10-008, ECF, CAR Dear Mr. Helling: The Planning Division of the City of Renton accepted the above master application for review on February 17, 2010. During our review, staff has determined that additional information is necessary in order to proceed further. The following information will need to be submitted so that we may continue the review of the above subject application: • Applicant must demonstrate the downstream system has capacity using a backwater analysis assuming a tailwater elevation for the 25- and 100-yr design storm(s) at the outfall to the Cedar River and specifically indentify impacts that may adversely affect the City's Park property. At this time, your project has been placed "on hold" pending receipt of the requested I information. Please contact me at (425) 430-7314 if you have any questions. Sincerely, L��-� � ,� I �� I Vanessa Dolbee (Acting) Senior Planner cc: King County Housing Authority-Hugh Watkinson/Owner(s) Renton City Hall • 1055 South Grady V�'ay • Renton,Washington 98057. • rentonwa.gov / � � _�:: �:. - �::: �., ,��..� � �,;, �,�� , �; ,� �� i-�� Geotechnica! Engineering �� Design Study �'",� �,�l�� - � Wonderland Estates � �r�a�: r � � Renton, Washin.qton . . `wk. . . -� �'��'�,r..� + 4�1 • , �� °"=`' � ,�r„��-'GG � �, -�� `:, �,-,�j�c�, _ ,�.� ��`�� "'t �," _, � � �� - � � �'� - �� f�f� � ��= � ,�,� � ��p�� t� . �. .� .,�_ �� , � . '� • �,� j�'f �C�� `�=��''� ��:`:.�.�► Authority , ,�� and Huitt-Zollars, lnc. � �� -. , . February 17, 2010 ,� _. :: . � 17586-01 � � 4� �� . `��,� - � �'#Y of Rent�;;T �5 �. �.. Pi�;nning Divir , ��-� A . �: "� �; r EB 2 4 : �� 0��_�: , `,+�„� _ � > �..::. � �> . � �� - ..�� Sj �__ _ � r//.VZI�� .:: . �� `,�'_ �, - ,,,� ��- .� ',� _�. ♦ ' A � H/.Il�TC1�OWSCJ� Geotechnical Engineering Design Study Wonderland Estates ��+,�_ � �y�.�_ r e cNai cu r v. King County rtuu��,� and Nuitt-Zollars, !n� Februart• �� '�A f 17586-0 Prepared by Hart Crowser, Inc. J. Jeffrey Wagner, PE Kunal Shah, EIT Senior Principal Senior Staff Geotechnical Engineer Geotechnical Engineer ,iCC�W'es!'ane.4�,�enue�ti'�rth.Suite 200 �eattle.Washington 9d109-6272 �ax 206 328 5581 ..:, 2'�a , „?h'0 / �*: CONTENTS Pa�e 1.0 INTRODUCTION 1 2.0 PURPOSE, SCOPE, AND THE USE OF THIS REPORT 1 2.1 Purpose 1 2.2 Scope of Work 2 2.3 The Use of This Report 2 3.0 SITE AND PROJECT DESCRIPTIONS 2 3.1 The Site 2 3.2 Our Understanding of the Proposed lnfrastructure lmprovements 2 4.0 SUBSURFACE CONDITIONS 3 4.1 Soil Condifions 3 4.2 Groundwater 4 5.0 SEISMIC CONSIDERATIONS 4 5.1 Seismic Setting 5 5.2 Seismically Induced Geotechnical Hazards 5 6.0 GEOTECHNICAL ENGINEERING DESIGN RECOMMENDATIONS 6 6.1 Genera! Considerations 6 6.2 Site Preparation � 6.3 Pavement Design s 6.4 Curtain Drain Design 9 6.5 Site Utilities 10 6.6 Structural Fill Selection, Placement, and Compaction 10 6.7 Construction Considerations 12 ' 7.0 RECOMMENDATIONS FOR ADDITIONAL GEOTECHNICAL SERVICES � � FIGURES I 1 Vicinity Ma4� , ? Site and Exploration PI<�n Hart Crowser IIII 17586-01Febr �I . ` CONTENTS I',,,�� APPENDIX A FIELD EXPLORATIONS METHODS AND ANALYSIS � � Explorations and Their Location A-� Hollow-Stem Auger Borings A-' Standard Penetration Test (SPT) Procedures A . FIGURES A-1 Key to Explor, A-2 Boring Log H c A-3 Boring Log H c A-4 Boring Log Hc A-5 Boring Log Ht A-6 Boring Log Hc A-7 Boring Log H� A-8 Boring Log HC.-- A-9 Boring Log HC-8 A-10 Boring Log HC-9 APPENDIX B LABORATORY TESTING PROGRAM B-1 Soil ClassiFcation B-1 Water Content Determinations B-1 Grain Size Analysis (GS) B-� FIGURES B-1 Unified Soil Classification (USC) System B-2 through B-5 Particle Size Distribution Test Report HartCrowser Page ii 17586-01 February 17,2010 / GEOTECHNICAL ENGINEERING DESIGN STUDY 'I WONDERLAND ESTATES RENTON, WASHINGTON 1.0 INTRODUCTION This report presents the results of our subsurface explorations and geotechnical engineering design study for the proposed infrastructure improvements for the Wonderland Estates development in Renton, Washington. Figure 1 shows the project location on a Vicinity Map of the project area, and Figure 2 presents a Site and Exploration Plan showing the general layout of the roadways and ' proposed utilities and the locations of our explorations. This report is organized as follows: � Introduction; � ■ Purpose, Scope, and The Use of This Report; ■ Site and Project Descriptions; ■ Subsurface Conditions; I ■ Geotechnical Engineering Design Recommendations; and �� • Recommended Additional Geotechnical Services. �II Figures are presented at the end of the text. The field exploration procedures and logs are presented in Appendix A. The laboratory procedures and test results are presented in Appendix B. 2.0 PURPOSE, SCOPE, AND THE USE OF THIS REPORT 2.1 Purpose The purpose of our work has been to: ■ Assess subsurface conditions at the Wonderland Estates development; ■ Address potential on-site infiltration of stormwater; ■ Address potential geologic hazards; and ■ Provide geotechnical engineering recommendations related to the design and construction of the proposed infrastructure upgrades. These include roadways, utilities within roadways, and mainline utilities located outside the road�vays. Hart Crowser Page 1 17586-01 February 17,2010 . ` 2.2 Scope of Work Our scope of work to address the geotechnical design aspects of the project included the following items. We were to: ■ Conduct subsurface explorations along the existing roadways, which generally correspond to the proposed alignments for the new buried utilities; ■ Perform laboratory testing on selected soil samples; ■ Develop geotechnical engineering design recommendations; and ■ Present the results of our study in this report. 2.3 The Use of This Report We completed this work in general accordance with our contract dated October 8, 2009, with Huitt-Zollars, Inc. This report is for the exclusive use of King County Housing Authority, Huitt-Zollars, Inc. and their consultants for specific application to the subject project and site. We completed this design study in accordance with generally accepted geotechnical practices for the nature and conditions of the work completed in the same or similar localities, at the time the work was performed. We make no other warranty, express or implied. 3.0 SITE AND PROJECT DESCRIPTIONS 3.1 The Site Wonderland Estates is located in �vestern King County on the south side of SE Kenton Maple Valley Road (SR 169) at 149th Avenue SE. The site is approximately 900 feet (north-south) by 500 feet (east-west), covering an area of approximately 10 acres. It is a residential community generally consisting of asphalt-paved streets, mobile or modular homes situated on concrete pads, and associated greenbelts at the edges of the parcel. In general, the developed portion of the site is fairly flat, sloping slightly downward to the north. It ranges in surface elevation from about 120 feet at the south end to 100 feet at the north end near SR 169. There is an undeveloped hill in the extreme south�vest corner of the site that slopes steeply upward toward the souihwest. 3.2 Our Understanding of the Proposed lnfrastructure lmprovements In general, we anticipate that infrastructure improvements will include: Hart Crowser I'��ge � 17586-01 February 17,2010 ■ Resurfaced roadways, generally along the same right of ways as the existing streets. Final site grades will generally be the same as the existing grades. No significant cuts or fills are planned. ■ New subgrade utilities including storm sewer, sanitary sewer, water lines, and electrical lines. fvlost utilities will be about 3 to 5 feet below grade, although some limited portions of the storm and sanitary sewer lines will be at a maximum depth of 8 feet below grade. ■ Replacement of an existing curtain drain at the south end of the site. The new curtain drain evill likely be on the order of 3 to 4 feet deep and extend in an east-west direction near the south edge of the existing paved area. The new curtain drain will simply replace the function of the existing drain. Initially, potential on-site inflltration of stormwater was being considered. That concept has been dropped however, because soils and groundwater conditions are not favorable for infiltration. 4.0 SUBSURFACE CONDITIONS Our understanding of the subsurface conditions is based on information obtained from nine hollow-stem auger borings (HC-1 through HC-9). The borings, completed on )anuary 21, 2010, were each drilled to a depth of 14 feet. The boring locations are sho�vn on Figure 2. Detailed boring logs of the conditions observed at the exploration locations are included in Appendix A, and should be referred to for specific information. Results of the laboratory tests conducted for this study are presented in Appendix B. , We based our interpretation of subsurface conditions on materials encountered in our explorations at discrete locations. The nature and extent of variations beteveen explorations or at other locations could vary and may not become evident until construction begins. If variations then appear evident, it may be I necessary for Hart Crowser to re-evaluate the recommendations in this report. �I 4.1 Soil Conditions II Our borings generally encountered very loose to �1�ediurn dense allu�ial soils rrom the ground surface downward. These materials consisted primarily of silt, sand, gravel, and combinations thereof. A consistent pattern or trend �vith depth �vas not apparent, although the uppermost material within about 2 feet beneath Hart Crowser Page 3 17586-01 February 17,2010 the pavement section appeared to be slightly denser than the material directly below it. Most of the alluvial soil encounterecl consisted of sandy silt to silty sand, however, at some locations, our borings encountered zones of gravel and at other locations, borings enco�mtered very soft, very sandy silt. Or particul��r note were the following: ■ Boring HGS. Very soft zone at 8-foot depth. ■ Boring HC-8. Scattered �vood debris at 7-foot depth. ■ Boring HC-9. Very loose to vcry soft zone with scattered wood debris at about 5- to 10-foot depth. The nine borings �vere each aclvanced to a cle�th of 1-� feet. Three of the nine borings were terminated in very dense soils. The remaining six borings �vere still within loose to medium dense soils at their termination depth. The loose, soft or medium dense soils are not suitable for direct support of pavement sections, on-grade utilities, or structural fill in their present condition. To provide suitable support for these overlying elements, these soils would need to be compacted in place to a dense condition or removed and replaced evith structural fill. Alternatively, if the soils are �vet (as we expect), compaction would be difficult and other ground improvement methods could be used, as discussed herein. 4.2 Groundwater At the time of drilling, our borings consistently encountered groundwater at a depth of 2-1/2 to 5 feet below the ground surface. Note that measured groundwater levels are representative for the time indicated. Fluctuations in groundwater levels may occur due to variations in rainfall, temperature, seasons, and other factors. 5.0 SEISMIC CONSIDERATIONS The site is located in a seismically active area. In this section, we describe the seismic setting at the project site and discuss seismically induced geotechnical hazards. Hart Crowser Pdge 4 17586-01 February 17.2010 5.1 Seismic Setting II The seisinicitv of�vestern L�V��shington is doniin�ited by thc exi�tc�nce of thc� ��I, Cascadia Subduction Zone (CSZ) in which the offshore Juan de Fuca plate is �, subducting beneath the continental North American plate. Three main ty� � � �� earthquakes are rypically associated with subduction zone environments— � crustal, intraplate, and interplate earthquakes. Seismic records in the Pug� � � Sound area clearly indicate the existence of a distinct shallow zone of crust�il seismicity (e.g., the Seattle Fault) that may have surficial expressions and can extend to depths of up to 25 to 30 km (15 to 18 miles). A deeper zone i� associated with the subducting Juan de Fuca plate and produces intraplatE� earthquakes at depths of 40 to 70 km (24 to 42 miles) beneath the Puget �ouncl region (e.g., the 1949, 1965, and 2001 earthquakes) and interplate earthquakes at shallow depths near the Wa� ' 5.2 Seismically Induced Geotechnical Hazards Potential seismically induced geotechnical hazards at the site that we con include liquefaction, surface rupture, lateral spreading, and landslides. Our I review of these hazards is based on the soils encountered ir r,��r ��Yn��r�ri�� regional experience, �nc! nur knrn�vlP�I�P �f In�,�l �c�i�mi�it�, 5.2.1 Liquefactior � Li uefaction refers to the reduction of shear stren th in saturated ranular q g , g deposits due to pore water pressure buildup. Pore pressure buildup can occur as a result of cyclic shaking during an earthquake. While the soil is in a liquefied state, it has the physical properties of slurry. Vertical or lateral movements that are potentially damaging to structures could result from liquefaction. A significant portion of the site soils are in a loose to medium dense condition, and are below the water level. As such they are susceptible to liquefaction. As � stated above, this could result in significant settlement of surface pavement, � catch basins, manholes, buried pipelines, and other structures that are supported Iabove the liquefiable soils. I The actual amount of settlement that could occur along pipelines and at the � ground surface as a result of a seismic event is difficult to quantify given the depth of explorations. Total settlement depends in part on the thickness of the underlying soil that liquefies. Based on our assessment of this thickness, we estiinate that total settlement at the ground surface due to soil liquefaction could be on the order of 6 inches or so. Because the liquefaction potential is similar Hart crowser Page 5 17586-01 February 17,2010 for soils lcros� lhc site, t�ve ,inticipate thlt dirfer�ntial settlen�ent l�et�veen utilily pipe segments or pipes and catch basins, for example, would be about 1;'' t�; 3/4 of the total settlement. We recomi��n�l th,�.� rh� rl��i;n ��n�i�f�r thi� potential total and differF�nti��l ��ttl�mF�nt. 5.2.2 Surface Rupture We are not aware of any kno�vn faults that intersect the site. �herefore, lli�� potential for surface rupture is considered very small. Rather than attemp�in_; t � design against potential surface rupture, in our opinion, it would be reason,,l�I�� for the owner to plan for the repair of any damage� th��t �url,�<E�� ru��ture ni<iv ��; 5.2.3 Later;�l Spreading and Landslicies opinion th��t the potential for lateral spreading is very small anc� does not special design considerations. Although there is some potential for seismic�+i induced landslides to occur in the steep slope area at the southwest corn�r � the site, this area is mapped as glacial till (typically very dense), and in our opinion the risk of siQnificlnt sli�lin� ic relitiv�lv Intiv Znd ��nul�l not tvpi� � ��rrant speci�l desi This section of the report presents our conclusions and recor��mendations regarding the geotechnical aspects of design and construction for the infrastructure improvements. We have developed our recommendations based on our current understanding of the project and the subsurface conditions encountered by our explorations. If the nature or location of the proposed improvements is different than we have assumed, Hart Crowser should be notified so we can change or confirm our recommendations. 6.1 General Considerations Based on the current design plans and our discussions �vith the design tearn, the following represent the primary geotechnical considerations for design and construction for the proposed site improvements: ■ A significant portion of the site soils are in a loose to soft condition and are not suitable, in their present condition, for direct support of pavement sections or on-grade utilities. Hart Crowser Page 6 17586-01 February 17,2010 . ■ Pavement sections would require the removal or recompaction of these unsuitable soils within a recommended depth belo�v the crushed rock layer. ■ Where these unsuitable soils are present directly beneath on-grade utilities, they would also need to be removed or recompacted to a dense condition within a recommended depth beneath the utility invert elevation. ■ Recompaction of the unsuitable soils to a dense condition would be difficult due to the relatively high water table. As a minimum, the soils below about 2 feet in depth �vould likely be too wet to compact effectively. For planning purposes, it is reasonable to assume that these soils will need to be removed and replaced with imported structural fill. ■ In some areas, where subgrade soils are particularly soft or loose, a geotextile fabric may also be necessary beneath the imported structural fill layer. ■ Potential settlement due to soil liquefaction, as discussed herein, should be considered �vhen designing the subgrade utilities and pavement sections. Flexible couplings or other means may be appropriate to accommodate potential differential settlement. ■ Due primarily to the relatively high groundwater level, on-site storm�vater infiltration is not feasible. ■ We do not expect that the proposed construction �vill have a significant effect on the stabiliry of the hillside at the south end of the site or any other nearby slopes. 6.2 Site Preparation Site preparation will consist primarily of removal of the existing pavement materials and some small areas of sod and topsoil. We recommend the following; ■ Remove the uppermost layer of pavement and unsuitable soils as recommended herein, to provide a suitable subgrade for the proposed pavement sections. ■ Do not use the stripped pavement or organic material as structural till. ■ Rernove or completely grout abandoned utilities. Seal the ends of remainin�.; stubs to prevent piping of soils into the conduits. Hart Crowser Page ^ 17586-01 February 17,2010 ■ Provide for a representative from Hart Crowser to be present during construction to observe stripping and subgrade preparation activities and to identify areas that may require additional removal of unsuitable material. 6.3 Pavement Design The pavement section can be supported on grade, provided that the underlying subgrade consists of at least 18 inches of densely compacted granular material as described herein, over a reinforcing geotextile fabric. We recommend the following: ■ Rei��ove the existing pavement section and loose underly�ing soil to a depth of 18 inches below the bottom of the paveil�ent section. ■ Compact the exposed sub;rade to the extent possible. Since it may be �vet, "dead roll" the exposed surface. Avoid compaction with a vibrating compactor as this may significantly disturb soils that are �vetter than optimum and cause them to pump. ■ In subgrade areas that can not be compacted to a dense condition, place a high-strength geotextile fabric (i.e., Mirafi 600x or equivalent) over the exposed subgrade. (The Contractor should be made responsible for the survivabiliry of the fabric.) ■ Place an 18-inch thickness of imported structural fill consisting of railroad ballast or 2- to 4-inch quarry spalls. The layer will serve as a stable sub-base and a drainage layer. Place the material in maximum 10-inch thick loose lifts and compact it to a dense condition. ■ If particularly soft areas are encountered, additional overexcavation may be necessary. This should be assessed by the geotechnical engineer in the field during construction. ■ Ir subgrade soils are firm and dense �vhen exposed it may be possible to eliminate the fabric and/or use clean sand and gravel fill in lieu of the railroad ballast/quarry spalls. This should be assessed by the geotechnical engineer in the field during construction. ■ Perform a test section of the subgrade layer prior to placement of the overlying pavement section. The subgrade should be firm and non-yielding when proof rolled, prior to placement of the crushed rock. Based on the results of the test section, it may be necessary to modify these recommendations. Hart Crowser Page 8 17586-01 February 17,2010 ■ Pavement sections over the prepared suk�gr�de (_described herein) may k�e clesigned to consist of a minimum of 3 inches of asphalt underlain by at least 6 inches of crushed rock. It should be unclerstood that this pavement section is not based on a rigorous pavement design analysis. It is a rypical section that has been successfully used for pavements that experience relatively high volumes of light passenger vehicles and occasional heavy trucks. (e.g., retail parking lot entrances and truck delivery areas.) A rigorous pavement design analysis is beyond our scope of work. We can perform a pavement design analysis if so desired, if we are provided with appropriate input parameters such as traffic volumes, expected design life, etc. 6.4 Curtain Drain Design We understand that a curtain drain will be constructed along the south edge of the site, to intercept surface and groundwater that flows toward the site from the adjacent hillside. We recommend the following: ■ Design the curtain drain trench to be at least ? feet�vide and 3 to 4 reet cleep. ■ Place a perforated drain pipe near the bottom of the trench. ■ Surround the pipe on all sides with at least 6 inches of drainage material. The drainage material should consist of a well-graded (per ASTM D 2487), free draining sand and gravel that contains less than 3 percent passing the no. 200 sieve, based by dry weight on the minus 3/4-inch fraction of the material. Drainage material should be compatible with the perforations in the pipe. ■ Backfill the trench to the ground surface �vith the drainage rY�aterial. ■ Slope the pipe to a suitable discharge/outlet. ■ Provide cleanouts that can be accessed from the ground surface at regular intervals along the drain line. The selection of the drainage material is very important. A sample of the proposed material should be submitted and accepted by the project geotechnical engineer prior to its use. Hart Crowser Pdge 9 17586-01 February 17,2010 6.5 Site Utilities Site utilities may be supported on-grade, on dense subgrade soils. However, �ve do not expect dense subgrade soils to be present at the utility invert elevations. We expect that soft/loose site soils will be encountered at the pipe invert elevations. As such, we expect that subgrade improvements will be necessary. We recommend the following: ■ If dense subgrade soils are not present at the utility invert elevations, overexcavate beneath the structure or pipeline a minimum of 18 inches to allow for the placement of stabilizing materill. ■ Place a high-strength geotextile (i.e., ,'�1irafi 600x or equivalentj at the bottom of the excavation. The fabric width should be at least � feet wider than the trench width so it can envelop the sides of the stabilizing materials. (The Contractor should be made responsible for the survivability of the fabric.) ■ Place at least 18 inches of clean railroad ballast or 2- to 4-inch quarry spalls on the geotextile to stabilize the bottom of the excavation. ■ Place a thickness of bedding material that is appropriate ror the type and size of the pipe. We considered the effect of uplift pressures on buried utilities for those that �vill be placed below the long-term water level. Based on discussions with Huitt- Zollars, we understand the worst case scenario would be a 60-inch inside diameter (72-inch outside diameter) catch basin with its base bearing 10 feet below the ground surface. For normal conditions with the groundwater levcl about 2 feet below the ground surface,we have estimated a factor of safety against buoyancy to be at least 1.5. For extreme conditions with the groundwater level at the top of the catch basin, we estimate the factor of safety against buoyancy to be about 1.3. 6.6 Structural Fill Selection, Placement, and Compaction Structural fill will be required below paved areas, for backfilling o�erexcavated areas at the bottom of utiliry excavations, and for backfilling utility trenches and around utility structures. This section includes our recommendations for structural fill selection, placement, and compaction. 6.6.1 Selection of Structural Fill We recommend the following; Hart Crowser Page 10 17586-01 February 17,2010 ■ Beneath the pavement section, utility structures, and at the base of utiliry trenches use railroad ballast or 2- to 4inch quarry spalls to provide a stable subgrade. ■ Directly beneath utility pipes, use pipe bedding as appropriate for the size and type of pipe. ■ In utility trenches more than 2 feet below the bottom of the overlying pavement section, and not under water, use well-graded sand or sand and gravel with less than 5 percent passing the US No. 200 sieve by dry weight (based on the minus 3/4-inch fraction). This type of material would generally be suitable for use even during periods of wet weather construction. ■ If it is necessary to place fill under water, use railroad ballast or 2-to 4-inch quarry spalls. 6.6.2 Placement and Compaction of Structural Fill We make the following recommendations for the placement and compaction of structural fill: ■ Place structural fill only on dense, non-yielding subgrade soils or on soils overlain by a geotextile fabric as recommended herein and accepted by the on-site geotechnical engineer. ■ Maintain moisture content within 2 percent of the optimum moisture ' content, as determined by the modified Proctor test method (ASTM D 1557). ■ Place and compact all structural fill in even horizontal lifts with a loose thickness no greater than 10 inches. If small, hand-operated compaction ' equipment is used to compact structural fill, fill lifts should not exceed 6 to 8 � inches in loose thickness. '� ■ In the upper 2 feet below pavement sections compact structural fill to at least 95 percent of the maximum dry density as determined by the modified Proctor test method (ASTM D 1557). More than 2 feet beneath pavement sections the degree of compaction may be reduced to 92 percent of the r��odiried Proctor maximurl� dry density. ■ The compacted densities of all lirts shoulcl be verified by testing. The compaction of railroad ballast or quarry spalls may be assessed visually by a qualified geotechnical representative. Any material to be used as structural Hart Crowser Page 1 1 17586-01 February 17,2010 fill should be sampled and testecl prior to use on site, to determine its maximum dry densiry and gradation. 6.6.3 Use of On-Site Soils as Structurai Fill The on-site soils do not appear to meet the criteria presented herein for structural fill and are not considered suitable for use. They may be assessed by the on-site geotechnical engineer during construction. For planning purposes, we recommend that the contractor not rely on the use of on-site soils for any of the structural fill applications. 6.7 Construction Considerations 6.7.1 Temporary Excavations Excavations for utility installation may be performed as open cuts provided that the side walls are sloped at a safe angle. However, it should be realized that significant caving may occur in the side walls of an unsupported excavation, particularly below the water level. Because of the many variables involved, actual slope inclinations required for stability in temporary cut areas can only be estimated prior to construction. In general the stabiliry and safety of cut slopes depends on a number of factors, including: ■ The rype and density of the soil; ■ The presence and amount of�vater seepage, including rainrall; ■ The depth of cut; ■ Proximity of the cut to any surcharge loads near the top of the cut, such as stockpiled material, traffic, structures, etc., and the magnitude of these surcharges; ■ Duration of the open excavation; and ■ Care and methods used by the contractor. We recommend the following: ■ Stability of the temporary slopes should be made the res{�onsibility of the contractor, since the contractor is in control of the construction operation and is continuously at the site to observe the nature ancl condition of the subsurface. ■ Require that the contractor make all exclvations in accordance with all local, state, and federal safety requirements. Hart Crowser Page 1 2 17586-01 February 17.2010 ■ Protect slopes from erosion by using plastic sheeting as necessary. ■ Limit the n�aximum duration of the open excavation to the shortest time period possible. Considering the �ctual subsurface conclitions �nd the depth of ground�vater, rel�tively tlat side slopes may be required. Even with relatively flat slopes, significant caving may occur, especially below the groundwater level. Shoring of utility trenches may be necessary and should be used as determined appropriate by the contractor. 6.7.2 Groundwater Control During Construction We anticipate that groundwater control will be a significant factor during construction, particularly during the installation of deep utility lines and structures. During our field exploration program, we observed the excavation of a test pit at the south end of the site. The test pit was about 6 feet long, 1-1/2 feet wide and =�-1/2 feet deep. The test pit side walls generally consisted of silry sand to sandy silt. ■ At a depth of 3 feet, we observed groundwater seepage into the test pit at a rate of about 1 gallon per minute (gpm). ■ At a depth of 3-1/2 feet, caving of the side walls began to occur. ■ At a depth of 4 feet, ground�vater seepage increased to about 3 gpm. Actual grounclwater seepage and trench wall stabiliry during construction may be different than observed in this test pit. Actual conditions will depend, in part, on the location of the excavation, soils encountered in the excavation, time of year, length of time that the excavation remains open, and weather conditions. The contractor should be prepared to deal with both surface water and groundwater during construction. As a minimum, we expect that the contractor �-vill need to utilize ditching and sump pumps. Additionally, a well point system may be necessary to control groundwater, particularly for the deeper excavations.The contractor may elect to use other methods as well and should be made responsible for the groundwater and surface water control during construction. Hart Crowser Pdge 1 3 17586-01 February 17,2010 I 7.0 RECOMMENDATIONS FOR ADDITIONAL GEOTECHNICAL SERVICES Before construction begins, �ve recommend that Hart Crowser revie�v the final design plans to confirm that our geotechnical engineering recornmendations have been properly interpreted and implemented in the design. During the construction phase of the project, �ve recommend that a Hart Crowser representative observe the following: ■ Site preparation activities; ■ Pipeline and utility structure subgrade preparation including overexcavation or unsuitable soils and placement of fabric as appropriate; ■ Fill sub�rade preparation in roacl�vay areas including overexcavation of unsuitable soils and placement of fabric as appropriate; ■ Placement of structural fill material beneath pipelines and utility structures and beneath pavement sections; ■ Placement of structural fill in utility trenches and around utility structures; ■ Placement of drain pipes beneath roadways; ■ Placement and compaction of the crushed rock; ■ Fill placement including roadway%embankment construction ancl utility installation; ■ Evaluation of the suitability of import soils for use as structural fill or rree- draining fill; and ■ Other geotechnical considerations, �vhich may arise cluring the course of construction. The purpose of these observations and services is to note compliance with the design concepts, specifications, or recommendations, and to allow design changes or evaluation of appropriate construction measures in the event that subsurface conditions differ from those anticipatecl prior to the start of construction. J:`;jobs\1:�8601`,,titibnderland Estates Desi�;n ReporLdoc Hart Crowser Page 1-1 17586-01 February 17.2010 N29 1SN1\ 3S 3/1d aNZ9T a�,,,�o w � ti6 .�N P�S� `615� AVE SE � 6p�� Z9I o r �� rn « in 1- 160 � � J � 1 � 1 i^- w w � v �S�J H109t a �o �3S ld H109T �"� a vi�n �� i� 35 ld H165 T ,�`'��Y � � !� .+ � 3S'3Ab'H18ST �(j o �n I l � � � o 35 3l�ti H185T W �, a� y Q ��s r�O+, 157 fF'i AVE'SE L'C �c',s, � 156TH AVE SE °� �r S � t � � (�� '� ��s AVE SE 35 3�t1 H19ST �Z �I �o�y �`t,� � J�;� Q�,y ,ti'1��s �f�i 154TH AVE SE c� -+�� 35 3nt/H1SST � �' ""��u� �ld,s` ,� � hA��' �a�'r''�i�4'�`�`� ,�O �S 3N ld MOQdFIS 3S �d Qilf'S T y i r ��c! �` 'ti � ��. � �'"—� QUINCY•PL SE `n� 152ND AVE SE P �-�+-�sf � 4 UWCY'AVE'NE ? �f '� 3S�d pNZS T "� � Q �S1d1SiST � .(o tiy� W � OTH AVE SE �'l/ - ,tih �� i 3N ld OJSdd � - $ ORCAS�E�NE �y��49TH PL SE ��b , w Sy �S1J �$ 3 � ILE AVE•NE � 3S ld H184I �'S- �. t� 148TN AVE SE N � �,�� /r�l z � C VESE r ��• in q' � �4'�N� I � •146TH AVE SE �S ` ' , j� 6 � KI`fSAP AVE NE -�-� � � � �d1 145TH AVErSE �' r � 35 3QH'�H196i �� 3S 3�y H+1.9b� �►� `'02� �a"�`(�.d .Z `� �46jH AVE � � I- ��144TH AVE SE 3S�/1t1 H15b.T �I �l � bl. � J � `r �` _ � 143RD AV,E SE � .-7j �y J� �S �r S)�6. �? �vwi AVE NE 142ND AVE SE � "' 142ND AVE SE 1415 CT SE_ � � r�� 9s�. .`„�� a0��. �s) �S�i� e� (^' �o�. 1415T C'iSE V) ►::� �c; d ti •bt� a -' b 140TH AVE SE -7w Z 1 ' ' ' y+ ` r T �^ , S 1'a �bf'b 1Q /�. ++ I.:.� Q. � in F- I � ��, 140TH AV SE V � w �, v� � y � ti 3 S l d H 1 8£I 3 S 3�t/H 1 0 b T � DUVAeLL7AV�NE � �O �� a �` �� `n � 35•3�b'H18£T w / � � BREMERTON PL NE 1 � �� NE � � a �i3� ' �S�d 1�£t cJ.1� � � � N �... � � � o �� 35�nv H1s�� d y�6St 2 � �n w ; � VA15H0�L NE �! �Q � � � �S �S 133RD PL SE '��'O a� �n , — Z � O1 Z U lON AV E N E � �N;�l_ U N I O N A V E S E �S �d w� � � 2 w � w�u � }- �t% rn �'�b. �'Y2�. � `n w m � Z M Z Z 2 � PI E DR � `° 0'Y 3S l / j v~i $ N M • � � �(`r`� REDMOND'PL N W CW y�'�j Q ��t ��10F•I �� 3N 3nd N4 OW4� Z m,�'?�j� p2� 129TH�CT�SE� � � � A �� . J r_, � � aa�aoH a �'vs g � ,� 1J H.0 izan� av •sE � � � . I J � S� 16T o •� g AVE'NE a� � S� ;1b� � �'S �5�� ,rr� '� y, '�� /�y��J��d'` -----•• 5E 12411-I PL SE �'�b ,� u� c.� r ti w 1 ��M� NEWPORT��T � 3S 3/1t/H ' '1"'�Zt '^ `� � ii,ti�N��l'.,(�,o po >y ��3S 3/1y 19ZI I � ��1 � N 3/1b 30?1NOW Z F- �S 3nb 30aNpw�W � J , 1 � �bZi 3S,3�tY.H1SZ,T X 123RD CT $ N � UOMNNA� N- � � `; K1R LAND CT SE � '} �_ � � .l' I F. 'r o�.-� � �y� � � r a h� 12•IST AVE SE �' �gs•3n'd_Ob� i 7 3517 dNZ� �j �5��3G � ]NDEX PL NE ,w o�PJ � � _ �J 3S 3��(b 15TZ.T�� 1�0�VE-SE � � �,C�C�� z v�i l�G� � ` � * �ro ti��' �� ` �`,..,° 119 AVE.SE� z � z �PQ,� �y� � 1,�gT�H AVE SE � 11,7'T};I AVE SE w 118TH AVE IS � � � � �9,�H,Q�� EDMONDS AVE NE z Z Q �% � , EDMO D AVE�SE 116 �AVE SE . 16TH AVE SE � � � ;� � N�� ,� � � 0 � 3N ld NOSNOi19 �"'' SE o V 'W w Q`�� ' � B �NE C� AVE'SE 113TH AVE SE'a v~i - n 2 � l�cn ,� C� � `1�6lAtNr � ��a' 31V�d�13a31NOW-�P ,j� w °' 3S ABERDEEN CT SE �T35r3/1b 3N dn"19135Nf15"'`� 3N 3�tJ_I2�dtJJ� �` � �N ' 1j N��'b� ;�� 111TH AVE,E OTN PL SE ,^`�y � � �� • � N�� u' `i TOTH F ,� � - � �gLe v� ��p � �, l0 E�J 5 AVE S � �O� � p 108 AV�SE � •. '^ � � 2 ` .f IG AVE 5 C'ti ,� � u, �n � N � Z � '��' �X' GRANT AVE.S � � �' N �+P'10P10994L l Ol/6/ZO lV3 '�� I �Ij�,.. . , '•i�d, \,,,,d, � -- -- ,,,,,i•� y� � ,,,,..e, �� : i��r �r��dl . � _,�: r' f � ,...1. .....�arw..§",.-...-.-_-..r-_._.... .-,.«.:..�..+f:.n:. __"... -_.._ . .-.>..._`.._� _ . i . ... . . .,�...��-- � . .,�; . . .. .. -Y...«..�. ..e�r # ,:F � R- o ` � ',rr � I } o I m '��llllt� �,� !'';��a;'� .� HC-3 • � � � � _ (fI �. � � ��'I�'�t 1 �f 1�`�'i! s — 5 � . � _ 5 � O HC-1 ` I� ��I��{�; �� 'e" H�i Z m '�'�i��1�I'11 i �)�I ' �' � � I u i ��l/� �/ -..^�^� � � �� /�/�! ;/� 1 A `'� ��'' f� 6+�' i ;/,, r � �/ O � I'' - � ` —�` _ t ' � �� ' a � 5%r` � , — �s \ � t ; y . � . .. ��t:...' bs'i � . � . _ _.�-.�" . � � :. h ! .. . � , / HC-5 O HC-4 O --- � i ; �, _ ; , —, � �� _ " , � � , � - � i � �� 5 `� � 'ii >-•�! __;, 4' � � '-l ;,l�, � ��.�" ,.� -�� .:� �� _ _� �,,,�t � �"'.� �_ ! �� ; ,�� , I �� ---- ; . " HC-8 O 5 5 �HC.7 . � = S—�,.. ; .�1--� ��"'�'i ,� % HC-6 O ,.�� 1'�,.�--';'�`� � ,•,, `,, �j� r/ . ;' I , ; � < r . � ' � ( i � ,-" . - ,.�„ • _�� t � � �, �" , ,_ < _.�. . � _ . _ _ � � � {� ' , . ;� � ----- _�, I : e "„� , '�� - — �� — , �.�`,,:�I � I �. — �..-.� _ , �� i... � ► ,� i € _ � i -�� __,.�=-� I�� HC-9 O l � _ � � , � � _. �� ' .. .s � - I �� --�'- ��M � � eti' rr � �r .� �� i` , ;�r._ � �\ � t� � , __._ �. ti�; _ _ - ...�.._. _ .� -— a —=--_—, , .,,. r�_..... _ �;:� _�' � — __----_--- APPENDIX A FIELD EXPLORATIONS METHODS AND ANALYSIS Hart Crowser 77586-01 February 17,2010 APPENDIX A FIELD EXPLORATIONS METHODS AND ANALYSIS This appendix documents the processes Hart Crowser used in determining the nature of the site soils. The discussion includes information on the following subjects: ■ Explorations and Their Location; ■ Hollow-Stem Auger Borings; and ■ Standard Penetration Test (SPT) Procedures. Explorations and Their Location Subsurface explorations for this project include nine hollow-stem auger borings. The exploration logs within this appendix show our interpretation of the drilling, sampling, and testing data. The logs indicate the depth where the soils change. Note that the change may be gradual. In the field, we classified the samples taken from the explorations according to the methods presented on Figure A-1 - Key to Exploration Logs. This figure also provides a legend explaining the symbols and abbreviations used in the logs. Location of Explorations. Figure 2 shows the location of explorations, located by using a tape measure from existing physical features. The ground surface elevations at these locations�vere interpreted from elevations shown on an electronic survey file tided "15093201 VFTR-topo.dwg" provided by Huitt-Zollars, Inc. on February 9, 2010. The measurement method used determines the accuracy of the location and elevation of the explorations. Hollow-Stem Auger Borings With depths of 14 leet below existing ground surface, nine hollow-stem auger borings (designated HC-1 through HC-9) were drilled on January 21, 2010. The borings used a 3-3/8-inch inside diameter hollow-stem auger and were advancecl with a trailer-mounted drill rig subcontracted by Hart Crowser. The drilling was continuously observed by a geologist from Hart Crowser. Detailed field logs were prepared for each boring. Using the Standard Penetration Test (SPT), we typically obtained soil samples at 2-1/?-foot-clepth intervals. The borings logs are presented on Fi�ures A-� through A-10 at the end of this appendix. Hart Crowser P�ge A-1 17586-01 February 17,2010 Standard Penetration Test (SPT) Procedures This test is an approximate n�casure of soil �Icnsity 1nd consistenc}. To I�t useful, the results must be used with engineering judgment in conjunction �vith other tests. The SPT(as described in ASTM D 1586) was used to obtain disturbed samples. This test employs a standard 2-inch outside diameter �E�lit- spoon sampler. Using a 140-pound hammer, free-falling 30 inches, the san�pler is driven into the soil for 18 inches. The number of blows required to drive the sampler the last 12 inches onlv is the Standard Penetration Resistance. This resistance, or blo�v count, measures the relative density of granular soils and the consistency of cohesive soils. The blow counts are plotted on the boring logs at their respective sample depths. Soil samples are recovered from the split-barrel sampler, field classified, and placed into watertight jars. They are then taken to Hart Crowser's laboratory for further testing as described in Appendix B. In the Event of Hard Driving Occasionally, very dense materials preclude driving the total 18-inch sample. When this happens, the penetration resistance is entered on logs as follows: Penetration less than 6 inches. The log indicates the total number of blows over the number of inches of penetration. Penetration greater than 6 inches. The blow count noted on the log is the sum of the total number of blows completed af er the first 6 inches of penetration. This sum is expressed over the number of inches driven that exceed the first 6 inches. The number of blows needed to drive the first 6 inches are not reported. For example, a blow count series of 12 blows for 6 inches, 30 blows for 6 inches, and 50 (the maximum number of blows counted within a 6-inch increment for SPT) for 3 inches would be recorded as 80/9. I:`,jobs',,1'S8601';�ti'onderland Estates Design Report.doc Hart crowser Page A-1 17586-01 February 17,2010 Key to Exploration Logs Sample Description Classification of soils in this repo�t is based on visual fieid and laborarory observations which indude densitylconsistency.moislure Condition,grain size,and MOIShJfe plastiaty estimates and should not be construed to imply field nor taboratory lesting Dry Litde perceptible moisture unless presented herein.Visual-manual Gassifiplion melhods of ASTM D 2488 Damp Some perceptible moisture,likely below optimum were used as an idenGfication guide. Moist Likely near opOmum moisture content Soil desuiptions consist of the following: Wet Much percepdble masture,likely above opfimum Dansity/consistency,moisture,color,minor constituents,MAJOR CONSTITUENT, additional remarks. Density/Consistency M�nor Constituents Estimat�d P�rcerrtage Soil density/consistency in borings is related primarily to the Standard Slighdy(dayey,silty,etc.) 5 - 12 Penetration Resistance.Soil density/consistency in test pits and probes is Gayey,silty,sandy,gravelly 12 - 30 estimated based on visual observatan and is presented parenthetiplly on the 3�0 or GRAVEL Very(clayey,silty,etc.) 30 -50 Standard Standard Appronimale Penetrazlo� S�LT or CLAY Pe�etration sMar Stranylh Density R�sistance(N) Consistancy Resishnce(N) In TSF in BlowslFoot ��F� Laboratory Test Symbols Very loose 0 to 4 Very sott 0 to 2 <0.125 Loose 4 l010 SoR 2 ro 4 0.125 to 0.25 � Grain Size Classification Medium dense 10 to 30 Medium stiff 4 to 8 0.25 to 0.5 CN Consolidation Dense 30 to 50 Sliff 8 to 15 0.5 to 1.0 UU Unconsolidaled Undreined Triapal Very dense >50 Very sti(f 15 to 30 1.0 to 2.0 CU Consolidated Undrained Triaxial Hatd >30 >2.p CD Consolidated Drained Triaxial �U Unconfined Compression Sampling T�t Symbols os o�recc snear K Permeability � 1.5"I.D.Split Spoon � Grab(Jar) Q 3.0"I.D.Split Spoon pp podcet Penelrometer m Shelby Tube(Pushed) � Bag Approximate Compressive SVength in TSF N Torvane i � CutCngs Q Core Run Appro�amate Shear Strength in TSF CBR Califomia Bearing Ratio SOIL CLASSIFICATION CHART MD AAoisture Density Relationship SYMBOLS TYPICAL AL Atterberg Limils MAJOR DIVISIONS GRAPH �LE7TER DESCRIPTIONS �—�� Water Content in Perce�t �� i ,�eu�a,�;oca,.eis sa��• L- LiqUid Limit GR4VEL GR4VELS •' � GW F�5'.oz�s i�-ne:F+�+o Natural .,No Plasbc Limit GRAVELLY pp�RLv.GR:CEOGRAVEts ��S curnc oa.,oc�..Es� o Qo � Gp ��.cxivr�e.rtr�e pID Photoionization D�tecror Reading cow+se CA Chemical Analysis GfiNNED �r�ve�s wm, o str.cru,��s cwRYa-s�r�• DT In Situ Densiry in PCF SO�LS LpRE rrnN:C. FINES � � SYi�A%TL'Rf5 °`n��°cn� OT Tesls by Others fV�T:J/ED Oh NO aSEVE N�REU1BlE �YAYE"OiGVA5d1AvEl•SANO• FLIOUMOFFlESI � QiYl'IXTUlIES . � . Groundwater Indicators i s�rro aE�w sM,os • • Syy sF b`e'imie°on"�aSv.�EsvE�:r i I.f�RE TM4N 50'. .+ ♦ a�.+>.�aw��s AND �— Groundwater Level on Date �xp�R TM^" S�� or(ATD)Al Time oF Drilling N�tCCcEVE ��S . �OORITOR�OEDSAIOS 5'7� M1�1TlEO�WJF1�iS1 SP `�s l�w/D.urnEa+ra � Groundwater Seepage s�wos wrtH s.Tv vums s�w•�r (Test Pits) r.�Tw;u 57•. I FINES `� MXTI.RES �f�O:J15E FR�Ci;GN DFSSPIC ON h0 li ys��r� � µGVREGiEIE �^ Cl:�'Evy,11�,$y.NO-CLtv c— 41,Ip�1M Oi FRtE51 `� f.RtTUREb �76m�e�ey WORG�wCStTSaNJVERY�aiE SANOS itCGK�ICUF SILTV C9 p ML M�'EY Fr�L S:.hDS OR C1l.YEv S'dfllple T�6 .��d RdCOY�/ SlTS'l:RH S�i iNT OlAST�C'T' � W'JFGiN�ClPY50Gl01VT0 SIITS � FwE qp�p ioupir.nr CL r.rtauWv�asncm cw:�e,i� 12 r� GiAWED CUYS �essn+.wso - - ��na n�a.rs swrva;rs S-7 23 c� SOILS � _ OL a°�a�ow a�sroa�mMc stin �� t� — — 6 inches � c'CQETHaNso'.. U wOROA1Jli,SiTS.AfG:CEOUS CR x or r,ure�au is M�{ ouTo�ucEws v r�E s.wo ca - � s�uueal�aN xTrso�ts NO 2COSIE�E � � Sg SILT$ � �a�o�r�r noac:.wc u.rs a ho+ � �A� G�2E/.TFR Tv_�.�:: CH RASTOTV �O �/I��'� = � OH oacuac utirs cc i.rtouu to II.7Yl � NK�1 PLASTCIiY ORGANC SiT3 '" 17586-01 1/10 W �y � N KGNIVORGRNIC50K5 � � '� oE:7 nm.�us st+cr.ro5oc5r:rtN '� NI�H ORG�MIC�CNTENib Figure A-1 YW Y r��fE ry��5rr.2R5:RE:Jc_0'C�rAC-iEB��1z_rtS_er�_a�e5.<'_':'�OHS Boring Log NC-1 Location.See Figure 2. Drill Equipment:HoNow S[em Auger Approximate Ground Surface Elevation: 100 Feet Hammer Type-Split Spoon Horizontal Datum:NAD 83 Hole Diameter:6 inches VeRical Oatum NAVD 88 Logged By:A. Inglish Reviewed By:C.Lupulescu STANOARD �,qg uscs crapn� o,p�n PENETRATION RESISTANCE TESTS Class Log $OII�SCflptl0(1S m Fee1 Sample ♦ Blows per Fool 0 10 20 30 40 50+ ML Soft to medium sliff,moist to wet,dark brovm ; to gray.gravelly,sandy to very sandy SILT. . S-1 • 3 �y 3 .�2 � • 2 Q . � a W-G rMedium dense to dense,wet,brown to 5 a � • gray-brown,slightly silty to silty,sandy to � very sandy GRAVEL S-3 •. 19 • ' . '�Slightly silty SAND layer " � �A 9 � B � i 6 � i • � 10 . 1 � . SP-SM ; Medium dense,wet,gray-brown,slghtly sflty, '� gnvelly SAND. �5 ,� � � ' `.. �2 : �. : ` Bottom of Bonng at 14.0 Feel. � Started 01/21/10. � ! Y Completed 01/21/tU. ts � o � � . � � _ . i J � 0 � Z � x > . 20 7� 1C,. � � -� _ �=-� "n� �� `� 1.Refer to Figure A-1 for explanation of descriptions and symbds. • ��+�+� 2 Soil descriptwns and slratum lines are interyretive and actual changes may be gradual. 3.USCS designa6ons are based on visual mar�ual dassificaUon(ASTM D 2�88)unless othernrise 17586-01 1/�� supported Dy IaDoratory testinq(ASTM D 2487). 4 Groundwaler level,d ind�cated,is al lime of driping(ATD)or fa date specified Level may vary F19Uf@ A-Z wi,h time. Boring Log HC-2 Location:See Figure 2 Drill Equipment.Hollow Stem Auger Approximate Ground Surface Eievation: 100.5 Feet Hammer Type:Split Spoon Horizontal Datum: NAD 83 Hole Diameter:6 inches Vertical Datum NAVD 88 Logged By:A.Inglish Reviewed By:C lupulescu STAhDARd �,qg PENETRATION RESISTANCE TESTS USCS Graph�c pepth Gass Log Soil DeSCriptions n Feet Sampe • Blows per Foot � D 10 20 30 40 50• SM Very loose to very dense,moist to wet. �0 gray-6rown,slightly gravelly to gravelly,silty �� y � SAND 8 r .o �..z e ATD 5 Y B � o I 5 a 3 I GS $-3 � • . I � SOl6' � S-4 a • to I i ao S-5 ao 0 • 1 a ,a � Bottom of Boring at 14.0 Feet. � � Started O1f21/10. � Completed 01l21110. �s 0 v� U � _ 'a U J a o • � . � O - J � � � � m z 20 0 20 40 60 80 100+ • WatCt COntent m Percenl f1 Y 1.Refer to Fgure A-1 for explanaUon of descriptions and symDols ��`��0��'�L� 2.Soil descriplions and stralum lines are interpretive and actual changes may be gradual. 3.USCS designations are based on visual manual classification(ASTM D 2�88)unless othervrise 1 T586-01 1/90 supported by laboratory tesling(ASTM D 2�87}. Fl ure A-3 4.Groundwater tevel,i(indicaled.is al lime of dnlling;ATD)or for date specified. Level may vary g wilh lime. Boring Log HC-3 Location See Figure 2. Drill Equipment:Holbw Stem Auger Approximate Ground Surface Elevatan: 106 Feet Hammer Type:Split Spoon Horizontal Datum:NAO 83 Hole Diameter 6 inches VeRical Datum NAVD 88 Logged By:A.Inglish Reviewed By.C.Lupulescu STANDARD �,�qg usCs Grapnic �� PENETRATION RESISTANCE TESTS cias: �09 Soil Descriptions n Fe� sam�e ♦ Bbws per Fool 0 5 o ,o zo ao �o so+ SM Loose to medium dense,moist to wet, red-brorm to gray,silry to very silty SAND A 3 with gravel and orange motding S'� e ' � 3 � i ATD I y i 3 �2 2 . cs z 5 2 , , &3 3 • Q Z � a 4 � 3 • 2 10 � o S-5 3 o a - � Bottom of Boring at 14.0 Feet. . : . �f Started 01/21l10. . i �f Compkted 01I21/10. ts . . Ut� U' _ . i � (7 . . . J . m �O � . V J � Z . � m i � 2° o zo ao so eo too+ • Water ConleM n PerteM , fs u 1.Re(er lo Figure A-1 for explanation oI desaiptions and symbds. � 2.Soil descnplions and s�atum lines are interpretive and adual chanpes may be�raduel. 3.USC S despnations are based on visual manual dassification(ASTM 0 2488)unless other�wise 17586-01 1/10 suppoAed by laboratory leating(ASTM D 2187). FI ure A-4 4.Groundwater level,i(indicated,is at tlme oI drilliny�ATD)a for date speciNed. Level may vary g wilh Iime. Boring Log HC-4 Location See Figure 2. Drill Equ�pmenl:Hollow Stem Auger Approximate Ground Su�face Elevation:102 Feet Hammer Type:Split Spoon Horizo�tal Datum:NAD 83 Hole Diameter:6 inches Vertical Datum NAVD 88 Logged By:A.Inglish Reviewed By:C.Lupulescu STANDARD �qg PENETRATION RESISTANCE TESTS USCS GrephK Oepth Class �og Soil Descriptions m Feet Samqe • Blows per Foot � D 10 20 30 40 50+ SM Very loose to medium dense,moist to wet, 7 brown-gray to red-brown,slightly grevelly to 3 - gravetly,silty to very silty SANO. S-� • cs 4 � I 4 � � ATD 2 - � $-y • z 5 Qg� z . 2S �3 5 � . s SP-SM Medium dense,wet,gray-brown,sfghtly silly, s gravelly SAND. � . g uS 10 ML Hard,wet,gray-brown.gravelly,sandy SILT e � S-5 14 3 » F Bottom of Boring at 14.0 Feel. � Sta�ted 01l21l10. z Completed 01/21/10. �s o • U U _ 4 C7 . J , m O � , � • I � I J � Z � � m> i S i 20 0 20 40 60 80 tODL-J • Water Content in Percent �1 �r 1.Reler lo Figure A-1 for explanation of descriplions and symbols. �'��"�•"��, 2.Soil descnptions and slratum lines are interpretive and actual changes may be graduai. 3.USCS designalions are based on visual manual classificatan(ASTM D 2�88)unless olherwise 17586-0'J 1/10 supporled by laboratory lesting{ASTM D 2487). FI U!'@ A-5 4.Groundwaler level.if indicaled.is at lime of drilling(ATD)or for date specified Level may vary g vnth hme Boring Log HC-5 Location:See Figure 2. Drill Equipment_Hollow Stem Auger Approximate Ground Surface Elevation 109 Feet Hammer Type:Spiit Spoon Horizontal Datum:NAD 83 Hole Diameter.6 inches Vertical Datum:NAVD 88 Logged By:A.Inglish Reviewed By-C L.;pulescu STANDARD �,qg uscs c�epnw o�n PENETRATION RESISTANCE TESTS c,�ass �op Soil Descriptions n Fee� Sampb • Blows per Faot 0 o io 2o so �o so« -- SM Very loosa,moist to wet,gray-brown to 5 • red-drown,slightly gravelly,silty SANO. S_� a � 3 � I y Z � ATO S-Z Z � • 2 i ML Very soR to medium stiff,wet,gray-brown—— 5 2 very sandy SILT with gravel. S-3 Z s � S-� ° p GS 10 � o S-5 ' • 3 � a Bottom of Boring at 14 0 Feel. � StaRed 01/21/10. . � Compkled 01/21l10. �5 0 U ' U � _ ' � m O � U O Z K � m Z � 0 20 40 60 80 100• • Waler Contenl n Percenl f1 � 1 Refer lo F,gure A-1 for exptanaYon of descriptions and symbols ""`��V� 2.Soil descriplions and sUatum lines are interpretive and actual changes may be preduat. 3.USCS designatio�s are based on viwal manual classification(ASTM D 2488)unless ot�erwise 17586-01 1/10 suppated by laboralory IesGng(ASTM D 2�87). FI ure A-6 4.Groundwaler level,if indicaled.is at 6me of driling(ATD)or for date specified. Level may vary 9 I wilh Gme. Boring Log HC-6 Lxation:See Figure 2. Dnll Equipment:Hollow Slem Auger Approximale Ground Surface Elevation: 100 Feet Hammer Type.Split Spoon Horizontal Datum-NAD 83 Nole Diametec 6 inches Verticai Datum:NAVD 88 Logged By A. Inglish Reviewed By C Lupulesc:� STANDARD �qg PENETRATION RESISTANCE TESTS USCS Graphic Depth aass �09 Soil Descriptions in Feet Sample . eaws Per Fooi Q 0 10 20 30 40 50+ SM Very loose to Ioose,moist,gray-brown, 3 siightly silty to very silty SAND with gtavel. S_� n 3 � z a $-2 2 • Q i 4 AFD 5 � S-3 ° Z GS I i I GM Loose,wet,gray-brown,silty.sandy z GRAVEL. 5 S-4 �i 3 i 10 ; SP-SM Very dense,wet,red-brown to gray-brown �" � slightly gravelly,silty SAND. o S-3 . • a � Bottom of Boring at 14.0 Feet j � � Started 01/21/10. • � � Completed 01/21/10. ts � 0 u U 2 a c� m 0 `,$ A � � � Z � Q m z �� 0 20 q0 60 80 100+ • Waler Conlenl in Percent �� Y t.Refer to Fiyure A-1 tor explanation of descriptions and symbols. •�•`�••�■O��t 2.Soil descnptions and stratum lines are interprebve and actual changes may be gradual. 3.USCS desiynalions are based on visual manual Gassification(ASTM 0 2488)unleu otherwise 17586-01 1/�0 supported by laboralory lesting(P,STM D 2487}. Fl ure A-7 4 Groundwater level.if indicated,is at time of drilling(ATD)or for dale specified level may vary 9 with lime. Boring Log HC-7 Locatan:See Figure 2 Orill EquipmenC Noilow Stem Auger Approximale Ground Surface Elevation:1Q4.5 Feet H�nmer Type:Split Spoon Horizontal Datum-NAD 83 Hole Diameter.6 inches Vertical Datum:NAVD 88 Logged By:A. Ingiish Reviewed By C.Lupulescu STANDARD �qg PENETRATION RESISTANCE TESTS USCS Graph�c Depth Class Loy SOiI DCSCfip1i0f1S in Faet Sample ♦ 8bws per Foo1 � D t0 20 30 40 S0+ SM Very bose to medium dense,moist to wet, 6 red-brown to gray-brown,slghtly gravelly to 4 gravelly,slightly silty to very silty SAND. S'� • 3 2 S'2 � ATD � GS Q 5 Z q , � s-s ' • a` � 9 S� 10 tt 10 u o S-5 '� • a " a Bottom of Boring at 14A Feel. $ Slarted 01121110. � Compleled Q1/21/10. �s o � v i V 2 � 6 C7 I m� I �' I N' �i � I � JI Zi � � m> > z � 0 20 40 60 80 100; • Water Coment in Percent f� `t 1.Refer to Figure A-t for explanation otdescriptions and symbols. ��+,v��+�+• 2.Soil descriptions and stralum Fnes are mterpretive and adual changes may be yradual. 3.USCS designaUons aze based on visual manual dassification{ASTM D 2488)unless othenvise 97586-01 'l/10 suppoAed by lahoratory lesting�ASTM D 2187). FI ure A-8 4.Groundwater level,if indicated.is at tirr�of drilling(ATD)or for date specified. Level may vary g wilh time. Boring Log HC-8 Location See Figure 2. Drili Equipment:Hollaw Stem Auger Approximate Ground Surface Elevation: 112 Feet Hammer Type:Split Spoon Horizontal Datum:NAO 83 Hole Diameter 6 mches Vertical Datum•NAVD 88 Logged By:A.Inglish Reviewed By•C.Lupulescu STANDARD �pg USCs Grepn�c �D�h PENETRATION RESISTANCE TESTS Class log Soii Descriptions m Feet Sample • Blows per Foot 0 0 �o zo s� ao so• SM Very bose lo medium dense,moist to wel, 5 red-brown lo gray-brown,slightly silty to silty S_� s � � i SAND. ! 5 I a ! Q Q Z � � ATD S.Z � • . 2 � � � 5 p I S-3 2 • z �Scattered wood debris. 3 $-4 5 • F �� ! $-rJ A � Z 1 � `" Bottom of Boring at 14.0 Feet. � � Started 01121/10. � � Completed 01l21/10. :—is 0 U � i ! I � { m � o � � � � J � Z � . 0 m � i Z� 0 20 40 60 80 1Q0� • Water Co�tent m Percent t/ �� 1.Refer to Figure A-1 for exptanalion of descrip6ons and symbols "�"��`�'��O�V� 2.Soil descriptions and sUatum tines are interpretive and actual changes may be gradual_ 3.USCS designations are based on visual manual classification(ASTM D 2�88)unless othenvise �7586-01 1/'10 supported by laboratory testing(ASTM D 2487). FI ure A-9 �.Groundwaler level.if irn�icatetl.is at time of drilling(ATD1 or for dale specifiecf level may vary g wi�h time Boring Log HC-9 Location:See Fgure 2. Drili EquipmenL Hollow Stem Auger Approximate Ground Surface Elevation. 118 Feet Hammer Type:Split Spoon Horizontal Datum.NAD 63 Hole Diameter:6 inches Vertical Datum:NAVD 88 Logged By:A. Inglish Reviewed By:C.Lupulescu STANDARO �qg uscs Grephic DepU PENETRATION RESISTANCE TESTS c�au Loy Soil Oescrip6ons m Feet sampe . s�ow:per Foot SM Loose,moist,gray to bladc,slighlly gravelly � o io zo so �o so+ a to gravelly,very silty SAND. S 1 , s < i a cs S-2 I ` ' � I a I ML Very soft,wet,gny,very sandy SILT 5 y � � nTD �g � � � SM Very loose to loose,wet,gray lo gray-brown ° very silty SAND with scattered wood debris. � ' S-4 • � to + , o S-5 Z • ' � 5 . � Bottom of Boring al 149 Feet. ' � StaRed 01/21/10. �, � Compkted 01/21/10. �5 , o • U I U _ 'a � m 0 m � � �I JI 2! I I O� 9; z' 20 0 20 40 BO 80 i00+ • 'Nater Content in Percent t* u 1 Refer lo Figure A-1 for explanalicn of desaiptions and symbois. -�"•• `�•0��+�+� 2 Soil descriplions and sUatum Gnes are interpreGve and adual charges maY�9��- 3 USCS designalions are based on visual manual dassificalion(ASTM�2488)uniess otherwise 17586-01 9/10 supported by laboralory testing(ASTM D 248T) FI ure A-10 4.Groundwater level,iF indicated,is at time oF d�lling�ATD)or for date specified Leve1 may vary 9 with time- APPENDIX B LABORATORY TESTING PROGRAM Hart Crowser 17586-01 February 17. 2010 APPENDIX B LABORATORY TESTING PROGRAM A laboratory-testing program was performed for this study to evaluate the basic index and geotechnical engineering properties of the site soils. The tests performed and the procedures followed are outlined below. Soi! Classification Field Observation and Laboratory Analysis. Soi) samples from the explorations were visually classified in the field and then taken to our laboratory where the classifications were verified in a relatively controlled laboratory environment. Field and (aboratory observations include density/consistency, moisture condition, and grain size and plasticity estimates. The classifications of selected samples were checked by grain size analysis. Classifications were made in general accordance with the Unified Soil Classification (USC) System, ASTM D 2487, as presented on Figure B-1. Water Content Determinations Water contents were determined for most samples recovered in the explorations in general accordance with ASTM D 2216, as soon as possible following their arrival in our laboratory. The results of these tests are plotted or presented at the respective sample depth on the exploration logs. Grain Size Analysis (GS) Grain size distribution was analyzed on representative samples in general accordance with ASTM D 422. Wet sieve analysis was used to determine the size distribution greater than the US No. 200 mesh sieve. The results of the tests are presented as curves on Figures B-2 through B-5 plotting percent finer by weight versus grain size. J:�,jobs'�,,1��8601'�;�Nonderland Estates Design Report.doc Hart Crowser Page B-1 17586-01 February 17,2010 Unified Soil C/assifrcafion (USC) System Soil Grain Size Size of Openuig In Inches Number o1 Mesh per Inch Grain Size in Millimetres (US Slandardy ^ N O m N "1 � p O O O O R O O O O O O O O O p O f0 v th N�� m�il� t7 f IV f f0 � , � ' I . ' . I �. . � � �� . I ' � I � I I � 1 � � � I Op Op O�O O O� O O O O tO � Pf N � m �D Y O? N ��O �p y N) N CD �pp !p'� N � 19 N O ¢1 m tn /V - O O P O O � O O � O S O Grain Size in Mdlirt►etres COBBLES GRAVEL__ � SAND ' SILT and CLAY i — 1 i Coarse-Grained Soils Fine-Gtained Soils Coarse-Grained Soi/s ---- , -- - - - --, --Gw GP_�� G � GC SW _L SP j;� SM � SC i Cl�an GRAVEL<5°h fnes � GRAVEL with>129�o fines Gean SANO<5°�6 fines SAND with�12%Ones ' '_- - GRAVEL�50%coarse fraction larger than No.4 SANO>5094 eoarse fraction smaller than No.4 � ' Coarse-Grained Soils>50%larger Ihan No.200 sieve ,p�`,>4 for G W �) G W and S W, D �>6 for S W �`��'I�D Z �`3 G P and S P Clean GRAVEL or SAND not meeting �o�' `D,o X D�;� requirements for G W and S W G M and S M Arierberg lirmts below A line with PI<4 G C and S C Atterberg limits above A Line with PI>7 ' Coarse-grained soils with percentage of fines between 5 and 12 are considered borderline cases requiring use of dual symbols. D;7, D�,and Dso are the partiGes diameter of which 10,30,and 60 percent,respectively,of the soil weight are finer. Fine-Grained Soi/s ML CL OL MH CH i OH Pt - . _. T � _. SILT CLAY Organic SILT CLAY Organic � Highry Or�arnc Soils with L'puid Limit<50°�6 Soils wilh Liquid Limit>50% SOIIS — - -- _ _--j Fine-Grained Soils>SO%smaller than No.200 sieve _ � 60 60 so C H so � 4o ao = C L ��ne � 3o P so N a 2o M H or O H 20 io �- CL- ML M � io or O L �0 10 20 30 40 50 60 7Q 80 90 �100 Liquid Limit �/ �� e�_oz�o•�o �;sa�o�_4.0��, 17596-01 1/10 Figure 8•1 Partic/e Size Distribution Test Reporf - � � � � s s : - : � � � g - g �o0 90 80 . 70 � Z gp � . � H Z 50 . W U � a 40 . 30 20 ?0 0 'I Od 7 0 1 0.1 0.01 0.0 � GRAIN SIZE-mm /o COBBLE %GRAVEL '/o SAND %SILT %CLAY • 0.0 60.5 32.2 7.3 ■ 0.0 I5.5 66.8 17.7 • 0.0 0.0 73.5 26.5 LL PI D� D�, D� D,� D,S D,o C� C„ � 28.389 11.652 8.232 2.222 0.362 0.169 2.5I 68.93 ■ 4.973 0.318 0.234 0.126 • 0305 0.17 0.136 0.082 MATERIAL DESCRIPTION USCS NAT.MOIST. • Slightly silry.very sandy GRAVEL GW-GM 8.I% o ■ Gravelh.silty SAND SM 23.9% � ♦ Silty S�tiD SM 26.0% N ; Remarks: Proj�ct: wonaertar,d Es�aces � • 0 � cu.nt: _ � � • Source: HC-1 Sample Vo.: S-3 Depth: 5.0 to 6.5 m ■ Source:HC-2 Sample No.: S-3 Depth: 5.0 to 6.5 ' � Source: HC-3 Sample No.: S-2 Depth:2.5 to 4.0 � ^ � A � 17586-0i i/10 ��Q�� Figura B-Z , Particle Size Distribution Test Report _ � � � � � z � : � � i � : � �oo i � so ao �o _ . � w so z : � � . i : � . Z 50 W U � a 40 • . � 30 • 20 i 10 • 0 100 10 1 0.1 0.01 0.0 GRAIN SIZE-mm /o COBBLE °k GRAVEL %SAND %SILT %CLAY • 0.0 22.6 48.� 28.9 ■ 0.0 23.3 64.8 ]1.9 � 0.0 0.0 41.4 58.6 LL PI Das �eo �so �30 ��s ��o C� Co • 13.263 0.415 0.216 0.079 ■ 14.591 0.419 0.334 0.?Ol 0.097 1.50 6.55 � 0.214 0.08 MATERIAL DESCRIPTION USCS NAT.MOIST. • Grdvelly,sith'SAND SM 18.1% o ■ Slightly silry,gravelly SAND SP-SM 24.0°/a � � Ven'suid�'SILT Ml, 39.6% h � Remarks: Project: Wcmderland Estates � � � Client: _ a � • Source:HC-4 Sample No.: S-1 Depth:0.0 to I.5 � • Source:HC-4 Sample No.: S-4 Depth:7.5 to 9.0 m � Source:HC-5 Sample No.: S-4 Depth: 7.5 to 9.0 � � R V 17586-01 1H0 �[� Figuie&3 � �I Particle Size Distribution Test Report o � N c � � � a i � � i � $ - C 100 90 , � 80 • 70 � I � w 60 Z � H Z 50 . W U � a 40 ; 30 20 � 10 • �i i. 0 100 10 1 0.1 OA1 0.0 GRAIN SIZE-mm /a COBBIE °ti GRAVEL %SAND °/.SILT °/,CLAY • 0.0 0.0 50.7 49.3 ■ 0.0 1.7 53.4 44.9 � 0.0 0.0 72.9 27.1 LL PI D� D� D� D,� D,s D,o I C� C„ • 0.204 0.103 0.077 'i ■ 0.485 0.187 0.105 ♦ 0.476 0.274 0.209 0.087 MATERIAL DESCRIPTION USCS NAT.AAOIST. � Very silt}•SANU SM 38.4% o ■ Very silty SAND Svl 19.1% s � 5iltv SA�1D SM 15.9°/s ti � Remarks: Project: wonderland Escates z � 0 c� C.�1Afl�: x � � • Source: HC-6 Sample No.: S-3 Depth: 5.0 to 6.5 m ■ Source: HC-7 Sample No.: S-2 Depth:2.5 to 4.0 � • Source: HC-8 Sample'do.: S-1 Depth:0.0 to 1.5 A � A v i7S86-0! 1f10 �R FiQura e-4 � � Particle Size Distribution Test Report s � � £ m - h c F a � � i '> : i � C 100 90 80 - 70 � w so Z � � : Z 50 W U � a 4� . 30 20 10 � i 0 � 100 10 1 0.1 0 U1 0.0 GRAIN SIZE -mm /o COBBLE %GRAVEL %SAND %SILT %CLAY • 0.0 14.0 53J 323 i LL PI D,� D� D,� D,� D„ D,o C� C„ • 3.881 0.26 0.175 ! MATERIAL DESCRIPTION USCS NAT.MOIST. • Gravell}'.ven'silir'SAND S�1 18.8% 0 a h � Remacks: ProjeCt: Wonderiand Estates a � ¢ 0 � Client: _ � • Source: HC-9 Sample Vo.: S-2 Depth:2.5 to 4.0 m � � � � 17586-01 1H0 ��Q�� Figure B-5 H«1TT Z�LLq,RS HUITT-ZOLLARS,INC. • 8/4 E Pike Street . Seatlle,WA 98122-3893 . 206.324.5500 plrone • 2f16.328.1880 faz . huitt-mlars.com Letter of Transmittal Date: March 5. 2010 Project No.: 15093202 ATTENTION: Arneta Henninq,er REFERENCE: Wonderland Estates Downstream Analvsis: BioloQical Im�act Assessment TO: Citv of Renton WE ARE SENDING YOU: � Attached 0 Under a separate cover ❑ Shop Drawings ❑ Prints ❑ Plans Q Specifications ❑ Copy of letter ❑ Change Order ❑ Samples ❑ Cloaies Date No. Description , 3 March 5, 2010 Memorandum THESE ARE BEING TRANSMITTED as checked below: ❑ For approval ❑ Approved as submitted ❑ Resubmit�copies for approval � For your use ❑ Approved as noted Q Submit copies for distribution ❑ As requested ❑ Returned for corrections ❑ Return corrected prints ❑ For review and comment ❑ ❑ FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: I COPY TO: file i SIGNED BY: � �• ' H«�ZT ZJLL�.RS HUITT•ZOLLARS INC. • 811 E Pfks SOa�t . Sealle.WA 96122-3Al3 • 206 324.5500 phone . 206.32&1a80 fu . huilFmlas.aorn Ma�h 18,2010 City of Renton Planning/Building/Public-Works Attn: Arneta Hennin�er Renton City Hall—6 Floor 1055 South Grady Way Renton,WA 98057 Ref Wonderland Estates—Response to March 18,2010 Email 15093201 Dear Arneta: This letier was grepared in response to your March 18, 2010 email regarding the 5 copies of the Revised Draft TIR for Wonderland Estates subaritted to the City of Renton on March 17`�. In your email you requested more infvrmation pertaining to the Revi.sed Draft TIlt for Wonderland Estates. Item 1• Your email stated: Prior to the meeting with Leslie on March S I had written you that you needed to rneet with Leslie to discuss the option of discharging additional water into this drainage system and that you would need to demonstrates the advantages and how the Parks Dept. will benefrt from discharging project runoff into the proposed drainage course versus the current drainage course(Madsen Creek). We met with Leslie Betlach as requested; the revised TIR attempts to address her concems. The advantages of the proposed discharge to the Parks Department are: (1) the biological impact which is addressed in Appendix E of the TIIZ and (2) the hydranlic impact discussed in the TIR in Section 3.2 Backwater Analysu. Ite�2• Your email stated: I Allen Quynn had some additional cornments that I forwarded to you on Feb. 25. The comments from Allen Quynn, referenced above, as transmitted in your Feb. 25 email are below — comments from Mr.Quynn is followed by our response: The engineer propose to discharge project runoff to a roadside swale along the south side ofMaple Yalley Highway(SR-1 b9)at the northwest corner of the site J:115093201 Wonderiand Estatest02_CORRESPONDENCE101 Letters 8 Memo1100318.LettertoAmefa.doc huitt-zollars.com • ARIZONA • CkLIFORhlA • COLORADO • tr'EY►�NEX1C0 • TEXAS • VrASHiNGTOtd ' � � j-�I�IITT�Z:�LL��RS ►�urr-mi�s.wc, . ei�e�se..c . s�.w�se�n� . za�mssoovno� • soe.ase:�eeor� . n�x-��.00m instead of at its current discharge location into the main channel of Madsen Creek. The proposal violates Core Requirement No. 1 of the Ciiy s Surface Water Design Manual since the projecl runo}jwill discharge into a drainage system that is not the natural discharge locations. In order for the Surface Water UtiJity to consider this request, the applicant must do the following.' a. Since the open channel segment downstream of SR-169 crosses through City Parks Department properly before discharging into the Cedar River, the applicant must obtain permission from the City of Renton Parks Department. **You need to meet with Leslie Betlach to discuss the option of discharging additional water into this drainage system. The applicant wil! need to demonslrate the advantages and how the Parks Dept. will benefit from discharging project runofj into the proposed drainage course versus the current drainage course(Madsen Creek). We met with Leslie Betlach as requested; the revised TIR attempts to address her concerns. The advantages of the proposed dischazge to the Parks Department are: (1) the biological impact which is addressed in Appendix E of the TIli and(2)the hydraulic impact discussed in the TIR in Section 3.2 Backwater Analysis. b. Although site runoff currently drains to Madsen Creek at the northeast corner ojthe site, the TIR states that the natural drainage is to the swale system along SR-169 at the northeast corner. The applicant will need to demonstrate that the historic drainage path for the project runo�was to the northwest. Historic topographic maps {such a USGS quad maps)rnaybe helpful here. We make no pretense of l�owing the location of the "natural" discharge point and have revised the TIR accordingly. Historic photos and other available information are inconclusive as to the natural discharge location. The current,low-flow discharge(up to 0.6 cfs only),is to Madsen Creek. Higher flows,including the 25- yr and 100-yr peaks,already discharge to the proposed location. The proposal will not change peak flows to the swale, except to control (improve) the 25-yr recurrence interval performance. This item is discussed in most depth in Section 3.2 Backwater Analysis. c. The applicant will need to make the necessary improvements to the downstream drainage system such that it has the capacity to convey the total tributary runofJ`'as required under Core Requiremenl No. 4 of the ' City's Surface Water Design Manual. This may inelude but is not limited to removal of debris in swales and replacement of improperly constructed storm pipe. We acknowledge the responsibility of making the needed improvements to the downstream swale system. J:1150932Q1 Wondeiartd EstateslO�CORRESPONDENCE101 Letters 8 MemoN00318.LettertoAr�ta.doc huitt-xoflars.com • AR1ZGtJfi. • CkLlFORA'Ik • COLORADO • HEtN 1�1EXIC0 • TEXAS • WASHINGTOIv �� Hu��rzaL��s Ml(T7,DOLLARS.MIC. • 814 E Pllis 9tret . 3ealle.M!A 96121�J197 . 206_7M.56l0 P�� • Z68.32�.1AQ0 iu • hdtl-mlars.uw Following your review of this response letter,please contaGt us with any fiuther inquiries and let us lmow if there is anything we can do to help expedite the review. Sincerely, Haitt-Zollars,Inc. _ __ t C.�il�t-*�L Chuck Mannmg,PE J:115093201 4'JonCerand Es+atesi02 CGR�SPCd�DEP;CE101 LeUers 8 Memo110Q318.LeHe;toAmea.dcc huitt-zoilars.com • ARIZONA • CALIFORNIA • COLORADO • NEW MEXiCO � TEkAS • WASHINGTON � � � HLIITI^Z�JLLq,RS HUfTT-ZOLLAftS,INC. • 814 E.Rke Street • Seattle,WA 98122-3893 • 20&324.5500 phone . 206.328.1880 fax . huitt-zd�ars.com Letter of Transmittal Date: March 17. 2010 Project No.: 15093202 ATTENTION: Arneta Hennin er REFERENCE: Wonderland Estates Revised Draft TIR � OF� . �d TO: Cit of Renton �/ WE ARE SENDING YOU: � Attached ❑ Under a separate cover 0 Shop Drawings ❑ Prints � Plans ❑ Specifications ❑ Copy of letter ❑ Change Order ❑ Samples ❑ Copies Date No. Description 5 March 16, 2010 Reports THESE ARE BEING TRANSMITTED as checked below: ❑ For approval ❑ Approved as submitted ❑ Resubmit copies for approval � For your use ❑ Approved as noted ❑ Submit copies for distribution ❑ As requested ❑ Retumed for corrections ❑ Return corrected prints � For review and comment ❑ , ❑ FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: � R�C�t�r'�;� �� F RENT ��.��N �aR � � 2�� ,�AR , fi 2010 ��F��Vl�ryy p�� COPY TO: file �/j� � , SIGNED BY: � _ .. __ N _.�� , • -.�_ :^ • ., _ __-. -. • -----.-__ • _.. _ _.. • -_ .-.. • , -_ ; };_-_�, , , � � � Denis Law Cl� Of Mayor � � `��= �' � � � � :. ,� � .� � . ,� � .�.� . Department of Community and Economic Development Alex Pietsch.Administratnr Don Helling Huitt-Zollers 814 E Pike Street Seattle, WA 98122 SUBJECT: "On Hold" Notice Wonderland Estates Utility Replacement, LUA10-008, ECF, CAR Dear Mr. Helling: Thank you for submitting the updated TIR as requested in the March 8, 2010 Hold Letter. After review of the new materials staff has identified some additional areas of concern as described below: 1. As proposed, additional stormwater would be diverted from its currant drainage location of Madsen Creek into a new stream tributary identified in the provided TIR as "Stream A". Stream 'A' flows through the City's Ron Regis Park and eventually outfalls into the Cedar River. A Biological Impact Assessment Memo completed by the Watershed Company was provided in Appendix E of the TIR report: Within this Assessment, The Watershed Company indicates that no wetlands were observed along Stream A: The City believes this report is in error, because a wetland was identified in this area during the Cedar River Regional Park Master Plan process. The diversion of additional stormwater, to this wetland, may have adverse impact to the wetland hydrology. The additional stormwater runoff could result in an increase in the wetland size and/or value affectively increasing its buffer size and/or area. If the wetland chaRges in size and/or value it would have adverse impacts on the Cedar River Regional Park Master Plan and anticipated improvements for Ron Regis Park. Furthermore, the City has received grant funding for Ron Regis Park from the Recreation and Conservation Office (RCO) and the Federal Land and Water Conservation; these grant funds require that particular irriprovements are made to the Park. Changes to the wetland or Stream `A' may impact the Cit�s ability to comply with the grant funding requirements. 2. Additionally the City is working with potential FEMA funds to rehabilitate the Elliot Spawning channel that was damaged in the 2006 and 2009 Cedar River flooding events. The Elliot Spawning channel is located just downstream of point F of Stream 'A', as Renton City Hall • 1055 South Grady Way • Renton,lNashington 98057 • rentonwa.gov . ' Mr.Don Helling April 2,2010 Page 2 of 3 identified in the TIA. Any increase in Stream flows may affect the City's access to the site during construction as well as potentially impact the spawning channel itself. In addition to the above concerns, the City Stormwater Division has questions and/or concerns about the provided TIA. The following is a list of issues identified by the City's �tormwater Division: 1. The TIR states that discharging site runoff to the northwest corner of the site would alleviate flooding in Wonderland Estates and reduce some of the flooding potential in Lower Madsen Creek. The TIR does not quantify how much flooding would be reduced. It would seem that removing 3 cfs from the total tributary flow to Madsen Creek would have negligible improvement in the amount of on site flooding. 2. The Stormwater Division is confused with Table 3.1 on page 13. Under existing conditions for the 25-yr storm, Wonderland Estates contributes 4.52 CFS. Is this because the pumps do not have enough capacity to pump the on site runoff to Madsen Creek? What if the pumps were sized to discharge all the site runoff to Madsen Creek. What would be the amount of increased floodin� that would occur at the northwest corner of the site% 3. Why is the proposed flow for the 25-yr event 3 cfs for Wonderland Estates in Table 3.1? One would think the proposed flow should be 4.52 cfs + 3.0 cfs or 7.52 cfs, which is the capacity of the conveyance system of the proposed discharge route. 4. The Stormwater Division doesn't understand how the existing water surface elevations for Stream A at points A, B, C, D, E and F are higher than the proposed conditions. The proposal to divert additional flow to Stream 'A' will add 3 cfs for the 25-yr event; therefore, the water surface elevations must increase correspondingly. Table 3.2 shows the 25-yr design flow of 10.33 cfs for existing conditions and 8.81 cfs for proposed conditions. How can this be when additional flow is being diverted to Stream `A'? S. The project does not trigger flow control because the proposed improvements �vill not result in an increase in impervious surface; however, because Stream 'A' is located in an area with erodible soils, any increase in flow could result in erosion and subsequent degradation of water quality. To eliminate this condition, the proposal to divert flows would require that Stream `A' be placed in a pipe all the way to the Cedar River. Constructing a pipe through a wetland is not allowed per City code. Code would require that the pipe be placed in an alignment that avoids the wetland. Placing Stream `A' in a pipe would change the hydrology of the wetland by reducing the volume of tributary runoff and would require an analysis determine any impacts and appropriate mitigation. Finally, constructing the pipe near a sensitive area would involve federal, state and local permits. , . w � Mr.Don Helling April 2,2010 Page 3 of 3 Based on the above-identified technical issues and concerns the City requests that the applicant look at alternative drainage discharge locations that would not result in impacts to City Parks, grant funding, and spawning channel. At this time, your project has been placed "on hold" pending resolution of the drainage concerns and issues identified above. Please contact me at (425) 430-7314 if you have any questions or would like to schedule a meeting to discuss the identified project issues. Sincerely, i U,�2k.�(1- � !b�_ Vanessa Dolbee (Acting) Senior Planner Enclosure:Ron Regis Park Wetland Study and Delineation Maps cr. King County Housing Authority-Hugh Watkinson/Owner(s) ` Leslie Betlach,Parks Planning and Natural Resources Diredor Allen Quynn,Civil Engineer Ameta Henninger,Plan Reviewer . HUI1T-ZOLLARS,INC. • 814 E.Pike Street • Seatlle,WA 981223893 . 2(16.324 5500 phone • 206328.1880 fax • huilt-zolars com C;ty of Renton Memorandum Plannin9 ��vision DATE: February 9, 2010 - Revised April 7, 2010 ? '' �`�'�� TO: City of Renton ��od�D FROM: Huitt-Zollars, Inc. for King County Housing Authority i SUBJECT: Project Narrative: Wonderland Estates Infrastructure Improvements — 14645 Renton Maple Valley Rd PROJECT NARRAT IVE This project narrative has been put together for the Wonderland Estates Manufactured Home Park (for seniors) located within the City of Renton at 14645 SE Renton Maple Valley Road. The scope of the project at Wonderland Estates involves upgrading/replacing and/or extending existing utilities, including storm drains and the reconstruction of existing asphalt cement roadways. The project will create no net increase in impervious surface. Huitt-Zollars' consultant services have been retained by King County Housing Authority (owners of the Park) to provide civil engineering services to improve the Park's infrastructure, including improvements to on-site: o Sanitary sewer infrastructure (Coordinating with Cedar River Water and Sewer District) o Water(Coordinating with Cedar River Water and Sewer District) o Storm Drainage o Roadways o Electrical systems (primary, secondary, illumination) o Exploring feasibility of buried telephone, cable N, and natural gas BACKGROUND INFORMATION . Project Name - Wonderland Estates Infrastructure Improvements R��E�vEp Required Permits —(1) Environmental Review (2) Critical Areas Exemption APR I � Z��Q . P�N • There is no proposed land use change in use at the project site. R�I�V Zoning: J:115093201 Wonderiand Estates104_PROJ DOCS109_ApplicationslCA-SP-ER Application Matenals106-Project Narrative12010.04.07.P roject.Narrative.doc HUITT-ZOILARS,INC. • 814 E.Pike Sireet • Seatlle,WA 981223893 • 206.324.5500 phone • 206.328.18801ax • hu�t-zolars.com Subject Site: RMH; Residential Manufactured Home & RC; Resource Consenration East of Site: R-14; Residential 14 du/ac South of Site: Outside of City Limits a small tract of land adjacent to the site is zoned R-14 Residential 14 du/ac West of Site: R-8; Residential 8du/ac& RC Resource Conservation �I North of Site: RC; Resource Conservation (across the SE Renton Maple Valley Road) • The project site is an 11.70 acre (509,720, square feet) tract of land located on the south side of SE Renton-Maple Valley Road. The site has been developed and used for manufactured homes since the early 1960's. The manufactured home park has approximately 240,420 square feet of developed impervious surface area. No additional impervious area will be added to the site as a result of the planned project. • Access to the site is from a signalized intersection of the SE Renton Maple Valley Road. • A Category III Wetland has been identified in the southwest corner of the project site, adjacent to the forested steep slope area. Installation of buried utility infrastructure will occur within 5 feet of the wetland (reference wetland delineation flag C8). 1,680 square feet of asphalt in the wetland buffer will be repaved and 990 square feet of grind and overlay will occur in wetland buffer. o Information on critical areas on the site is documented in the attached Wonderland Estates Environmental and Permitting Review report. o The Preliminary Geotechnical Assessment has been attached to demonstrate soil conditions. . The drainage culvert located in the SE Renton-Maple Valley Road right of way adjacent to the northwest corner of the project site will be reinstalled at an appropriate flow direction and slope. • Estimated quantities and of materials involved in excavation of export and import materials is approximately 11,300 cubic yards. J:115093201 Wonderland Estates104_PROJ DOCS109_ApplicationslCA-SP-ER Application Materials106•Project Na rrative�2010.04.07.P roject.N arrative.doc a L HUITT-ZOLLARS,INC. • 814 E.Pike Street • Seatlle.WA 981223893 • 206.324.5500 plrone • 206.328.1 BBD laz • hum-zoMars.com o No trees are scheduled to be removed as a part of the grading project • The contractor may choose to provide a temporary job shack on an existing mobile home pad. . Total Opinion of Probable Construction Cost: 3.5 million . Mobile homes shown on OTAK survey represent the units that were on-site in December 2009. Since the time of survey additional permits have been granted for mobile home units and subsequently these homes have or will be moving to the site. The Wonderland Estates Mobile Home Park at maximum capacity can accomodate108 units. , , . Each mobile home is allotted two (2) parking spaced. There are 32 off street guest parking spaces on the site. There are 12 RV parking spaces on the site. ATTACHED (02/09/10): Preliminary Geotechnical Assessment. November 6, 2009, Hart- Crowser Wonderland Estates Environmental and Permitting Review. Nov.11, 2009. Watershed Company J:115093201 Wonderiand Estates104_PROJ DOCS109_ApplicationslCA-SP-ER Application Materials106•Project Narrative12010.04.07.Project.Narrative.doc DEPARTMENT OF COMMUNITY � � ��0� ,.�� AND ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: March 19, 2010 TO: Allen Quynn Leslie Betlach CC: Kayren Kittrick Vanessa Dolbee FROM: Arneta x7298 � SUBJECT: WONDERLAND ESTATES STORM The engineer submitted the attached Storm Drainage report. At my request the engineer prepared the attached response letter. Please review and respond. Thank you! i:lmemo.doc HUITT ZJLLA,RS HUITT-ZOLI/1RS,INC. • 814 E Rke Street • Sealtle,WA 981Y1•3893 . 206.324.5500 phone • 206.328.1880(a�c • huitt-zollars.com Letter of Transmittal Date: March 17. 2010 Project No.: 15093202 ATTENTION: Arneta Hennin er REFERENCE: Wonderland Estates Revised Draft TIR � ��R �p TO: Ci of Renton �/ -- - - WE ARE SENDING YOU: � Attached ❑ Under a separate cover ❑ Shop Drawings ❑ Prints 0 Plans ❑ Specifications ❑ Copy of letter ❑ Change Order ❑ Samples ❑ Copies Date No. Description 5 March 16, 2010 Reports THESE ARE BEING TRANSMITTED as checked below: ❑ For approval ❑ Approved as submitted ❑ Resubmit copies for approval � For your use ❑ Approved as noted ❑ Submit copies for distribution ❑ As requested ❑ Returned for corrections 0 Retum corrected prints � For review and comment ❑ 0 FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: • R�G�I�i'� �N F RENT �� . M -. /��'�*�'R��r�1V AR � 7 2�t0 MqR , '.�.` ? 201p ��N R�{/lEyy p COPY TO: file �� ` � SIGNED BY: ( ._ .. _� ,.. "__ � - .`.,. . . � ..-_�_�. ..i. , � '�_' .-_� � i_�� ,r. _J � �/\r'.� � � .�.. .�v J�1\ � � �l�.i� l 1 ��)LLm��:. - ------.__..____�_____---__-----__----__._d--_---------___._______------ HUITT-ZOLIARS,INC. • 814 E Pike Street • Seattle,WA 98122-3893 . 206.324.5500 phone • 206.328.1880 tax • hutt-zdlars.can March 18,Zo�o �RECE��rvroN ED City of Renton MAR 2 3 Zp 10 Planning/Building/Public-Works, P��R�� Attn: Arneta Henninger Renton City Hall—6`h Floor 1055 South Grady Way Renton, WA 98057 Ref: Wonderland Estates—Response to March 18,2010 Email 15093201 Dear Arneta: This letter was prepared in response to your March 18, 2010 email regarding the 5 copies of the Revised Draft TIR for Wonderland Estates submitted to the City of Renton on March 17`h. In your email you requested more information pertaining to the Revised Draft TIR for Wonderland Estates. Ite . Your email stated: Prior to the meeting with Leslie on March 5 I had written yoa�that you needed to meet with Leslie to discuss the option of discharging additionad water into this drainage system and that you would need to demonstrates the advantages and how the Parks Dept. will benefit from discharging project runoff into the proposed drainage cocrrse verstrs the ct�rrent drainage cotrrse (.�I�fadsen Creek). We met with Leslie Betlach as requested; the revised TIR attempts to address her concerns. The advantages of the proposed discharge to the Parks Department are: (1) the biological impact which is addressed in Appendix E of the TIR and (2) the hydraulic impact discussed in the TIR in Secdon 3.2 Backwater Analysis. Item 2. Your email stated: Allen Quynn had some additional comments that 1 fonvarded to you on Feb. 25. The comments from Allen Quynn, referenced above, as transmitted in your Feb. 25 email are below — comments from Mr. Quynn is followed by our response: The engineer propose to discharge project runoff to a roadside swale along the south side of Maple valley Highway(SR-169)at the northwest corner of the site J:115093201 Wonderiand Estates102_CORRESPONDENCEl01_Letters 8 MemoN00318.LettertoAmeta.doc � , , l�i��_� l LS,��LJ--�� , HUITT-ZOLLARS,INC. • 814 E.Pike Streel • Sea�le,WA 98122-3893 • 206.324.5500 phone • 206.328.1680 fax • huitt-zaNars.cam � instead of at its curre�tt discharge location i�tto the main channel of Madsen Creek. The proposal violates Core Requirement No. 1 of the City's Surface Water Design Manual since the project runoff will discharge into a drainage system that is not the natural discharge locations. In order for the Surjace Water Utility to consider this request, the applicant must do the following.• a. Since the open channel segment downstream of SR-169 crosses through City Parks Department property before discharging into the Cedar River, the applicant must obtnin permission from the City of Renton Parl�s Department. **You need to meet with Leslie Betlach to disctrss the option of discharging additional water into this drainage system. The applicant will need to demonstrate the advantages and how the Parks Dept. will benefit from discharging project runoff into the proposed drainage coterse verst�s the current drainage course (Madsen Creek). We met with Leslie Betlach as requested; the revised TIR attempts to address her concerns. The advantages of the proposed discharge to the Parks Department are: (1) the biological imgact which is � addressed in Append�Y E of the TIR and (2) the hydraulic impact discussed in the TIR in Section 3.2 Backwater Analysis. b. Although site i7rnoff cirrrentiv drains to �llndsen Creek at the riortheast corner of the site, the TIR states that the natural drainage is to the swale system along SR-169 at the northeast corner. The applicant will need to demonstrate that the historic drainage path for the project nenoff was to the northwest. Historic topographic maps (such a USGS guad maps)maybe helpful here. We make no pretense of knowing the location of the "natural" discharge point and have revised the TIR accordingly. Historic photos and other available information are inconclusive as to the natural discharge location. The current, low-flow discharge(up to 0.6 cfs only), is to Madsen Creek. Higher flows, including the 25- yr and 100-yr peaks, already discharge to the proposed location. The proposal will not change peak flows to the swale, except to control (improve) the 25-yr recurrence interval performance. This item is discussed in most depth in Section 3.2 Backwater Analysis. c. The applicant will need to make the necessary improvements to the downstream drainage system such that it has the capacity to convey the total tributary runoff as required under Core Requirement No. 4 of the City's Surfc�ce Water Design Manual. This may include but is not limited to removal of deb�-is in s�ti�ales a�zd replacement of inzproperlv constructed storm pipe. We acknowledge the responsibility of making the needed improvements to the downstream swale system. J:115093201 Wondertand Estates102_CORRESPONDENCE101_Letters 8 Memo1100318.LettertoAmeta.doc �u1�rz��L,�-� HUfTT-ZOLIARS,INC. • 814 E.Pice Street • Sealtle,WA 9812&3893 • 206.324.5500 phane • 206.328.1880 fa� . huitt-zdlars.cam Following your review of this response letter,please contact us with any further inquiries and let us know if there is anything we can do to help expedite the review. Sincerely, Huitt-Zollars,Inc. t �Q,w�r Chuck Manning,PE J:115093201 Wonderland Estates102 CORRESPONDENCE101 Letters&Memo1100318.LettertoAmeta.doc J