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HomeMy WebLinkAboutMisc (2)Wa MJ, r r; ", out.�'�y V4 `T • f i*� � \M � • tj,� i r .x n y f •_ a' +-4 lye '� U7 - rn � i I QL � t o j4 03 ZZU C�"�a[-®� B�\ 'tom. b� 4` S� •�� L ED 1 - - -L i � I I . n r 1 { ' II I� -- - I it i, .�r E LG & LGC File No: L03P0005, 0006 & L03TY401 Comment Response dmp, inc. (FORMERLY DALEY ENGINEERING CO.) August 18, 2003 Karen Scharer King County DDES 900 Oaks Dale Ave. SW Renton, WA 98055-1219 SEP 0 3 7201 PBE-DVBEO LAND UN' j;)ALEY - MORROW - POBLETE, INC USE SERVICEfNGINEERING - PLANNING - SURVEYING 726 AUBURN WAY N AUBURN, WASHINGTON 98002 TELEPHONE (253) 333.2200 L 3 ���� FAX (253) 333-2206 p00�6 RE: Liberty Grove (LG) & Liberty Grove Contiguous (LGC) L03P005 -006 i Dear Ms. Scharer: In response to your plat screening letter dated June 3, 2003, we offer the following responses: 1. Property Description, Engineering & Surveying: The preliminary plat maps have been modified in accordance with your request for items" a" through'T'. If you have specific questions, please direct them to our Land Surveyor Paul Morrow. He can be reached at (253) 333-2200. (15 sets) 2. Plat Calculations: The Density & Dimension worksheet has been revised as requested. See attached. (15 sets) 3. Recreation Area: The original plat of Liberty Grove was a combined project. As such, the majority of the recreational space was combined on the LGC site to provide a more useable recreational facility. In response to your comments, we have revised the design of Liberty Grove to include suitable, on -site, recreation space in accord with KCC 21A.14.180. 4. Drainage: The submitted drainage report addresses both LG and LGC. a. A drainage adjustment has been submitted. Please refer to the submitted plan revisions and revised Level 1 Off -Site Report. b. See the revised analysis. The level 3 flow control is being proposed to mitigate the existing problems within the private properties that make up the downstream conveyance systems. As such, no easements are being provided. As an alternative, a new conveyance systems from the project site, south to SE 1441h Street, may be provided in conjunction with Level 2 flow control. Both options are offered in Task 5 of the Downstream Analysis. LG &LGC File No: L03P0005, 0006 & L03TY401 Comment Response c. See revised Downstream Analysis and the revised conceptual drainage plan. d. See Task 5 of the Downstream Analysis and the revised conceptual drainage plan. 5. Traffic Study: A revised Traffic Report was prepared by DN Traffic Consultants. Please see the revised Traffic Study dated July, 24, 2003. (10 Sets) 6. Road Variance: The proposed SE 135th Place intersection has been relocated to comply with existing KC intersection spacing standards. No variance is required. 7. Road improvements: The Applicant is objecting to the request to provide conceptual road improvement information for the frontage along SE 136th Street. If frontage improvements are required, the applicant will provide the required engineering drawings during that phase of the projects. For a cross section of the possible improvements to SE 136th Street, please refer to the KCRS manual. 8. Pedestrian Connectivity 1 School Walkways: a. Liberty High School Gate: The gate described in your Plat Screening letter was not located during a field visit. At one time, n unofficial walking path existed at the end of SE 137th Place, west of LGC. The old walking path appears to (Tract A of the plat of Liberty Lane) connect the west end of the existing cul-de-sac, to the upper fields of the High School. Children living adjacent to the walking path indicated that the gate has been blocked by a fence, and that access is no longer possible. A more detailed review of the legal description and plat map of Liberty Lane, indicates that Tract A was originally the storm water pond for the development, and was never intended to provide pedestrian access. The existing bollards and walking path were likely the original access road for the storm water pond. A more detailed review of the existing walking conditions is described in the attached School Walking Analysis report. b. No safe walking access exists between the proposed plats of LG and LGC and the schools that will provide educational services. Only scattered segments of safe walking routes exist in the area. Most of the existing segments are limited to the periphery of the neighborhood and do not provide access to or through the interior of the neighborhood. With construction of required internal plat roads and frontage improvements, the children of LG and LGC will have safe walking access to the existing and proposed bus stop at the intersection of SE 136" and 160th Ave. SE. A more detail discussion is available in the attached School Walking Analysis report. 2 LG & LGC File No: L03P0005, 0006 & L03TY401 Comment Response 9. Wetlands: A revised wetland report has been provided, which addresses the concern raised in your screening letter. No additional wetlands have been identified. (see H&S Consulting report, dated July 18,2003) 10. Revised Plat Drawings: We have provided 15 sets of the revised plat drawings as requested. 11. Rezone: While we do not agree with staffs recommendation to support the proposed rezone, the applicant has provided Staff with the necessary documentation to make use of KCC 21 A.37, the County's TDR program. This will allow the applicant to continue with the proposed number of units without approval of the requested rezone. Please refer to the attached density calculation worksheets. In addition to the information requested, we have also attached 15 sets of the LG and LGC SEPA checklist for your review. The revised sections are indicated with underline. The check lists were modified to reflect the change from the proposed re -zone to the use of the TDR program to achieve the desired lot count. Additional clarification was also provided as to the proposed sewer line extension. We have also attached copies of the existing septic field easements for each of the existing properties. The existing easements will be removed at such time as public sewer service becomes available. This has been noted on the submitted site plan. If you have any questions, please contact me at (253) 333-2200. Sincer ly, Hans Korve Planning Manager DMP Inc Scharer, Karen Subject: Liberty Grove & LG Contiguous -rescreening & tech. mtg Location: RR, DDES C1 Start: Thu 10/09/2003 1:30 PM End: Thu 10/09/2003 3:00 PM Show Time As: Tentative Recurrence: (none) Meeting Status: Not yet responded Required Attendees: Whittaker, Bruce; Langley, Kristen; Gillen, Nick Resources: RR, DDES C1 This time is tentative as I'm not sure of Kris' availability. Information will be routed to you today. King County Department of Develo ment and Environmental Services as sv"el' De city and pi "n" sion Calcunako®ns P Land Use Services Division 900 Cakesdale Avenue South rr Iterriative formals available Renton, Washington 98055 9 ®� upon request (206) 296-6600 TTY (206 RECEIVED SEP 0 3 2003 .KING COUNTY Z0,7po0 0,3 LQ3P00Q6 [L03TY40M File plumber (To be filled in by DDES) I PRELIMIRlAftif WOOMSION WORIKSHEEVARELATING TO DENSITY AND DIMENSIONSI Several development regulations play a role in the creation of a subdivision within King County, Determining the allowable density, minimum density, and a lot width on a piece of property can be confusing. This worksheet will assist you in correctly applying specific portions of the code and will be used to determine if a proposed subdivision or short subdivision meets the density and dimensions provisions of the King County Zoning_ Code (Title 21A). This worksheet Is designed to assist applicants and does not replace compliance with adopted local, state and federal laws. Pre -application conferences are required prior to submittal of a subdivision or short subdivision. These conferences help to clarify issues and answer questions. They may save you both time and money by eliminating delays resulting from requests for additional information and revisions. You may call (206) 296-6600 to find out how to arrange for a pre -application conference. Worksheeit Prepared By: Hans K Dale: 4 . (Print Name) Subdivision Name:,. Uri y Grove Preliminary Plat (114 0 tion /TDR) Comprehensive Plan Land Use Designation:_ Urban Residenta[ R-4 to R-12 Zoning: R-4 * * R-4 Option w/ TDR If more than one Comprehensive Plan Land Use designation or zone classification exists for the property, show the boundary between the land uses or zones and the area within each on the preliminary plat map. If a single lot is divided by a zone boundary, transferring density across zones on that lot may be permitted subject to the provisions of K.C.C. 21A.12.200. L SI&g Area M.C.C. 21A.06,1172) also see (MC.C. 21.*.11-0001 Site area (in square feet) is the gross horizontal area of the project site, I= submerged lands as defined by K.C.C. 21A.06.1265, and I= areas which are required to -be dedicated on the perimeter of a project site for the public rights -of -way. 0 square feet In submerged land (any land below the ordinary high water mark — see K.C.C. 21A.06.825) + -0-- , square feet in perimeter rights -of -way which will be required to be dedicated (area 30 feet from center tine of road) 0 Total * All existing Density and Dimension Calculations Ub" Grove R-4 Option wJ TDR Page 1 of 6 Calculation: 210.830 Gross horizontal area of the project site -- 0 Total submerged lands and rights -of -way _ 210.830_-Site area in square feet NOTE: To continue calculations, convert site area in square feet to acres by dividing by 43,560 4.84 _ Site area in acres NOTE: When calculating the site area for parcels in the RA Zone, if the site area should result in a fraction of_ an acre, the following shall apply: Fractions of .50 or above shall be rounded up to the next whole number and fractions below .50 small be rounded down. Example: If the site area in acres Is 19.5 acres (less the submerged land and less the area that is required to be dedicated on the perimeter of a project site for public right-of-way) the site area can be rounded up to 20 acres. No further rounding is allowed. (See K.C.C. 21A.12.080) The base density is determined by the zone designations(s) for the lot. R - 4 du/acre *Not including TDR Ill. Alligmble Dwelling -in K. . 21A. A 2,070)1 The base number of dwelling units is calculated by multiplying the site area by the base density in dwelling units per acre (from K.C.C. 21A.12.030 - .040 tables). 4.84 site area In acres (see Section 1.) X 4 _ base density (see Section II) 19 _ _ allowable dwelling units Except.as noted below, when calculations result in a fraction, the fraction is rounded to the nearest whole number as follows: A. Fractions of .50 or above shall be rounded up; and B. Fractions below .50 shall be rounded down. NOTE: For parcels in the RA Zone, no rounding is allowed when calculating the allowable number of dwelling units. For example, if the calculation of the number of dwelling units equaled 2.75, the result would be 2 dwelling units. Rounding up to 3 is not allowed. (See K.C.C. 21A.12.070(E)). 'i, -T 'CYO O I —F'" This section must be completed only if the proposal Is a residential development if more than four dwelling units in the UR and R zones, stand-alone townhouses in the NB zone on Density and Dimension Calculations Uberty Grove R-4 Optlon w/ 7DR Page 2 of 6 property designated Commercial Outside of Center if more than four units, or any mixed use development if more than four units. Recreation space. must be computed by multiplying the recreation space requirement per unit type by the proposed number of such dwelling units (K.C.C. 21A.14.180). Note: King County has the discretion to accept a fee in lieu of all or a portion of the required recreation space per K.C.C. 21A.14.185. Apartments and town houses developed at a density greater than eight units per acre, and mixed use must provide recreational space as follows: 90 square feet X proposed number of studio and one bedroom units 170 square feet X proposed number of two bedroom units + 170 square feet X proposed number of three or more bedroom units + Recreation space requirement — NA Residential subdivisions, townhouses and apartments developed at a density of eight units or less per acre must provide recreational space as follows: 390 square feet X 19 proposed number of units = 7,410 390 square feet X 24 proposed number of units, including TDR - 91360 Mobile home parks shall provide recreational space as follows: 260 square feet X proposed number of units — NA V. Met,§ufldable Area [CLC,ik. 6.797); This section is used for computing minimum density and must be completed only if the site is located in the R-4 through R-48 zones and designated Urban by the King County Comprehensive Plan. The net buildable area is the site area (see Section I) less the following areas: 0 areas'= a project site which are required to be dedicated for public rights -of -way in, excess of sixty (W) of width + 0 sensitive areas and their buffers, to the extent they are required by King County to remain undeveloped + 0 areas required for above ground stormwater control facilities including, but not limited to, retention/detention ponds, blofltration swales and setbacks from such ponds and swales + 7,410_ areas required by King County to be dedicated or reserved as on -site recreation areas. Deduct area within stormwater control facility if requesting recreation space credit as allowed by K.C.C. 21A.14.180 (see Section IV) + regional utility corridors, and + other areas, excluding setbacks, required by King County to remain undeveloped 7,410 Total reductions Calculation: 210,830 site area in square feet (see Sectioni) -- 7,410 Total reductions 203,420 Net buildable area in square feet NGTE: convert site area is square feet to acres by dividing by 43,560 = 4.7 Net buildable area in acres 4.6 Net buildable area in acres Including TOR Density and Dimension Calculations uberty Grove R 4 Option w/ TDR Page 3 of 6 VI. Minimum UdZpn Residential DensIRMA&C,6 : The minimum density requirement applies oly to the R-4 through R-48 zones. Minimum density Is determined by multiplying the base density in dwelling units per acre (see Section II) by the net buildable area of the site in acres (see Section V) and then multiplying the resulting product by the minimum density percentage from the K.C.C. 21A.12.030 table. The minimum density requirements may be phased or waived by King County In certain cases. (See K.C.C. 21A.12.060.) Also, the minimum density requirement does not apply to properties zoned R-4 located within the rural town of Fall City. (See K.C.C. 21A.12.030(B)12.) Calculation: NA base density in du/ac (see Section II) X Net buildable area in acres (see Section V) = X minimum density % set forth in K.C.C. 21A.12.030 or as adjusted in Section VII - minimum dwelling units required V$. i n ff__SrA&@ SloMIMC& 2 A. : Residential developments in the R-4, R-6 and R-8 zones may modify the minimum density factor in K.C.C. 21A.12.030 based on the weighted average slope of the net buildable area of the site (see Section V). To determine the weighted average slope, a topographic survey is required to calculate the net buildable area(s) within each of the following slope increments and then multiplying the number of square feet In each slope Increment by the median slope value of each slope increment as follows: NA sq. ft 0-5% slope increment X 2.5% median slope value = NA + sq. ft 5-10% slope increment X 7.511/o median slope value = + + sq. ft 10-15% slope Increment X 12.5% median slope value = � + + sq. ft 15-20% slope increment X 17.5% median slope value = + + sq. ft 20-25% slope increment X 22.5% median slope value = + + sq. ft 25-30% slope increment X 27.5% median slope value = + + sq. ft 30-35% slope increment X 32.5% median slope value = + + sq. ft 35-40%o slope Increment X 37.5% median slope value = + Total square feet Total square feet in net buildable area adjusted for slope Calculation: NA total square feet adjusted for slope divided by total square feet in net buildable area weighted average slope of net buildable area % (Note: multiply by 100 to convert to percent -- round up to nearest whole percent) Use the table below to determine the minimum density factor. This density is substituted for the minimum density factor in K.C.C. 21A.12.030 table when calculating the minimum density as shown in Section VI of this worksheet. Weighted Average Slope of Net Minimum Density Factor Buildable Areas of Site: 0% -- less than 5% 85% 5% -- less than 15%' 83%, less 1.5% each 1% of average slope in excess of 5% 15% -- less than 40% 66%, less 2.0% for each 1% of average slope in excess of 15% Density and Dimension Calculations Liberty Grove R 4 Option w/ TDR Page 4 of 6 EXAMPLE CALCULATION FOR MINIMUM DENSM ADJUSTMENTS FOR MODERATE SLOPES: sq. ft 0-5% slope Increment X 2.5% median slope value = + 10,000 sq. ft 5-10% slope increment X 7.5% median slope value = 750 + + 20,000 sq. ft 10-15% slope increment X 12.5% median slope value = 2,500 + + sq. ft 15-20% slope increment X 17.5% median slope value = + + sq. ft 20-25% slope increment X 22.5% median slope value = + + sq. ft 25-30% slope increment X 27.5% median slope value = + + _ — sq. ft 30-35% slope increment X 32.5% median slope value = + + sq. ft. 35-40% slope increment X 37.5 % median slope value Y + 30,000 Total square feet 3,250 _ Total square feet In net buildable area adjusted for slope 3,250 _ Total square feet adjusted for slope divided by 30,000 Total square feet In net buildable area .108333 Weighted average slope of net buildable area 11°/a (Note: multipty by 100 to convert to percent — round up to nearest whole percent) Using the table above, an 11% weighted average slope of net buildable area falls within the 5% -- less than 15% range which has a minimum density factor of 83%, less 1.5% for each 1% of average slope in excess of 5%. Since 11% is 6% above 5%, multiply 6 times 1.5 which would equal 9%. Subtract 9% from 83% for an adjusted minimum density factor of 74%. This replaces the minimum density factor in K.C.C.-21A.12.030 table. This section should be completed only if the proposal includes application of residential density Incentives (K.C.C. 21A:34) or transfer of density rights (K.C.C. 21A.37). Maximum density is calculated by adding the bonus or transfer units authorized to the base units calculated In Section III of this worksheet. The maximum density permitted through residential density incentives Is 150 percent of the base density (see Section II) of the underlying zoning of the development or 200 percent of the base density for proposals with 100 percent affordable units. The maximum density permitted through transfer of density rights is 150 percent of the base density (see Section II) of the underlying zoning of the development. NA base density in dwelling units per acre see (Section II) X 150% = maximum density maximum density In dwelling units per acre X site area In acres = maximum dwelling units allowed utilizing density incentives (K.C.C. 21A.34) HA base density in dwelling units per acre (see Section II) X 200% = maximum density maximum density in dwelling units per acre X site area in acres = maximum dwelling units allowed utilizing density incentives with 100 percent affordable units (K.C.C. 21A.34) 4 base density in dwelling units per acre (see Section II) X 150% = B maximum density 8 maximum density in dwelling units per acre X 4.84 site area In acres = 29 maximum dwelling units allowed utilizing density transfers (K.C.C. 21A.37) Calculation: 19 base allowable dwelling units calculated in Section III + bonus units authorized by K.C.C. 21A.34 + 5 transfer units authorized by K.C.C. 21A.37 24 total dwelling units (cannot exceed maximum calculated above) Except as provided for nonconformances in K.C.C. 21A.32: Density and Dimension Calculations Liberty Grove R-4 option w/ TDR Page 5 of 6 A. In the UR and R zones, no construction shall be permitted on a lot that contains an area of less than 2,500 square feet or that does not comply with the applicable minimum lot width, except for townhouse developments, zero - lot -line subdivisions, or lots created prior to February 2, 1995, In a recorded subdivision or short subdivision which complied with applicable laws, and; B. In the A, F, or RA Zones: 1. Construction shall not be permitted on a lot containing less than 5,000 square feet; and 2. Construction shall be limited to one dwelling unit and residential accessory uses for lots containing greater than 5,000 square feet, but less than 12,500 square feet. (K.C.C. 21A.12.100) X Lot Width ■ 4 ■ Lot widths shall be measured by scaling a circle of the applicable diameter within the boundaries of the lot as shown below, provided than an access easement shall not be included within the circle, (See K.C.C. 21A.12.050). Lot Width circle i i r e\�R............ Lot Width Measurement Density and Dimension Calculations Liberty Grove RA option w/ TDR Page 6 of 6 ;;.-zTE DISPOSAL DRAIN FIELD EASEMENT -__--- _ ---: ;,_ the following, descri ed land located in King County, Washington, to wit: Lot 7 in Block 1 of .3anett's Renton Boulevard Tracts, as �f ;U per plat recorded in Volumn 17 of Plats, on page 60, records v' of King County. Do hereby define, declare and dedicate the following ease- ment: an: easement over, across and under that portion of property descibed as follows: The East 130 feet of the North 50 feet of Lot 7, Block 1, of Janett's Renton Boulevard Tracts, as per plat recorded in Volumn 17 of Plats, on page 60, records of King County, �.7ashLngton. Said easement is for the purpose of installation and main- tenance of the drainfield portion of an on -site sewage disposal 0 system to serve the following described property: :2 Lot 6 in Block 1 of Janett's Renton Boulevard Tracts, as 7 _ per Volumn of Plats, on page 60, records of King County, 7 - X Washington. The ground must be restored to its -original condition after any installation, maintenance or repair is performed. These _covenants shall run with the land and shall be binding upon all subsequent owners thereof until such time as a public sewer is available to serve said property. RECEIVFUm, {4 SEP p 3 2003 UNTY LAND!vu SERVICES L03P0006 In Witness Whereof, the said Grantor(s) have executed this �nIstrument this day of it 1985.cc S7.'AYX*' AZ',V,AtHINGTON , •,..... ,10" County offl ss. (Individual Acknowledgement) Notary Public in and for the State of Washington, residing at '_RLL,#-, +a_do hereby certify that on this 0q day of C17!n41985, personally appear before me 6// '� - fZ _ to me known to be the individual described in and who executed the within instrument and acknowledged that kt__ signed the same as k_k_ free and voluntary act and deed for the uses and purposes herein mentioned. GIVEN ENDER MY HAND AND OFFICIAL. SEAL this .?_-d day of L1, 1985. 7 Notary Public in and for the State of Washington, residing at in said County. 0 After recording return to: Mark A. Seek 13612 160th Ave- S.E. Renton, Washington 90059 0 DRAINFIELD EASEMENTS These easetnents (hereinafter the "Easements") are entered into this 24+l-•day of Sa I j 01915- by and between Mark A. Seek and Christine K Seek, husband and wife, as owners of Lots A. B. C and D, as described below, their heirs, successors, and assigns; and Mark Seek and Christine K. Seek., husband and wife, owners of Lot D as described below, their heirs, successors, and assigns. These Easements run with the land and bind all successors in interest to Lots B, C, and D. This document, upon recording, replaces and supersedes all prior recorded drainfield and sanitation Easements executed by the parties Itereto and/or pertaining to the property described herein. WITNESSCITI 1. The parties Seek own in fee certain real property in King County, {G Washington, more particularly described as follows: ,-4 Tract I, Block 3, Cedar Park Five Acre Tracts, according to the plat thereof recorded in Volume 15 of Plats, page 91, is King County, Washington. (hereinafter designated as "Lot V) O I Tlre parties Seek have recorded an approved subdivision of Lot 1, Recording No*, 941025n73, which_ divided Lot I into four lots.. This document .. memorializes certain Easements for on -site sanitation concerning the four lots, hereinafter designated Lots A, B, C. and D. a 3. The first lot (hereinafter "Lot A") is more particularly described as follows: Beg at the NW corner of Lot 1, thence. S for 10D feet along the W edge of Lot 1, thence 90 deg E for 96 f, thence 90 deg N for ID0 f, thence 90 deg W along the N edge of Lot I for 96 feet to POB; tog w an easement for on - site sanitation purposes over Lots B. C, and D. 4. The second lot (hereinafter "Lot B") is more particularly described as follows: ❑RAINFLELD EASEMENTS -- I EXCISE TAX HOT iiEQUfMD eras Dkaoo 3 Cc IN CD v-i Ry v4 CO Cr G I) M 0 Beg at the NE corner of Lot A, thence S for 100 feat, thence 90 deg E for 96 feet, thence 90 deg N for 100 feet, thence 90 deg W along the N edge of Lot I for 96 feet to POB; tog w an easement for on -site sanitation purposes over Lots C and D; and sub;. to an easement for an -site sanitation purposes to We benefit of Lot A. S. I'lue third lot (hereinafter 'Lot C") is more particularly described as follows: Beg at the NE comer of Lot B, thence S for 100 feet, thence 90 deg E for 8 feet, thence 90 deg S for 29 feet, thence 90 deg E for 70 feet, thence 90 deg N for 129 feet, thence 90 deg W along the N edge of Lot I for 78 feet to POB; tog w an easement for on -site sanitation purposes over, under and through Lot D. and subj. to casements for on site sanitation purposes to the benefit of Lots A and B. 6. Tlie fourth lot (hereinafter "Lot D') is more particularly described as follows: Beg at the NE comer of Lot C, thence E 330 feet along the N edge of Lot 1, thence 90 deg S for 300 feat, thence 90 deg W for 600 feet, thence 90 deg N for 200 feet, thence 90 deg E for 200 feet, thence 90 deg S for 29 feet, thence 90 deg E for 70 feet, then 90 deg N for 129 feet to POB; subj. to easements for on -site sanitation purposes to the benefit of Lots A, B and C; and subj. to an easement for utilities. 7. The Owners of Lot Aare hereby entitled to an Easement for their benefit over, under and across Lot D, as described herein and in Paragraph 9. The Easement described in this Paragraph is for the installation, operation and maintenance of a drainfield and related piping for the on -site sewer system for Lot A.. The area covered by . the Easement for the Lot A drninfield is more particularly described as follows: Beginning at a point 100 feet from the Northeast corner of Lot D. then West for 100 fed along the North boundary of Lot 1, then 90 deg. South for 130 feet, then 90 deg. East for 100 feet, then 90 deg. North for 130 fed to POS. O 8. . The Owners of Lot B arc hereby entitled to an Easement for their benefit over, under and across Let D as described herein and in Paragraph 10. The Easement described in this Paragraph is for the installation, operation, repair and maintenance of a drainFeld and related piping for the oa-site server system for Lot B. The area covered by the Easement for the Lot B drainfield is more particularly described as follows: DRAWFIELD EASEMENTS -- 2 n 1 &Mk Wo Beginning at the Northeast comer of Lot D, then West for 100 feet along the North boundary of Lot D, then 90 deg. South for 130 fed, then 90 degrees East for 100 feet, the 90 deg North for 130 feet to the POB. 9. The Owners of Lot A further are hereby entitled to a non-exclusive 5 Easement for their benefit over, under and across Lot D. The Easement described in this Paragraph is for the installation, operation, repair and maintenance of certain piping. conduit and similar materials incidental to and appropriate for the drainfidd for the on -site sewer system for Lot A. The arcs covered by the Easement conveyed in this Paragraph is more particularly described as follows: Beginning at the Southeast corner of Lot C. then East 140 feet to a point 130 feet South of the Northern boundary of Lot D, then 90 degrees North for 10 feet, then 90 degrees West for 140 feet, the 90 degrees South to the POB, together with any area adjacent to this area needed for access to or operation of the piping lying within this area, 10. The Owners of Lot B further are hereby entitled to a non-exclusive Easement for their benefit over, under and across Lot D. The Easement described in this Paragraph is for the installation, operation and maintenance of certain piping, conduit and similar materials incidental to and appropriate for the drainfield for the on -site sewer system for Lot A. The area covered by Ilse Easement conveyed in this Paragraph is more particularly described as follows: Beginning at the Southeast comer of Lot C, their East 240 feet to a point 130 fed South of the Northern boundary of Lot D, then 90 degrees North for 10 feet, then 90 degrees West for 240 feat, the 90 degrees South for 10 reet to the P08, together with any area adjacent to this area needed for C!3 _access to or operation of the piping lying within this td 11. The owners of Lot D agree, warrant and covenant that neither they not tj their heirs, successors, mid/or assigns will construct, maintain, or cause to be maintained C4 within the Easement areas described above as may be required by law stnnctures, roads, driveways or trails for vehicular traffic, or any other object that would impair the 1n operation of the drainfields or ancillary piping, air their compliance with applicable law. C) further, the Owners of Lot D agree, warrant and covenant that neither they nor their heirs, successors, and/or assigns will excavate or compact natural soils within any drainfreld area serving or to the benefit or Lots A, B, or C, ancillary piping, or related area that may be required by law. 12_ The Owners of Lot A are hereby entitled to a non -occlusive Easement for their benefit over, under and across Lot C. The Easement described in this Paragraph is DRA1NFlELD EASEMENTS -- 3 sy . 0 for the installation, operation, repair and maintenance of certain piping, conduit and similar materials incidental to and appropriate for the drainfield for the an -site sewer system for Lot A. The area covered by the Easement conveyed in this Paragraph is more -particularly described as follows: Beginning at the Southeast comer of Lot B, Easterly for 8 feet, then 90 deg. South for 29 feet to The Southern Southwest corner of Lot C, then 90 deg. East for 70 feet to the Southeast corm of Lot C, then 90 deg. North for 10 feet, then 90 deg. West for 60 fcc , then 90 degrees North for 29 feet, then 90 dcg. West for 18 feet to the West boundary of Lot C. then 90 deg. South for 10 feet to POB : 13. The Owners of Lot B are hereby entitled to a non-exclusive Easement For their benefit over, under and across Lot C. The Easement described in this Paragraph is for the installation, operation and maintenance of certain piping, conduit and similar materials incidental to and appropriate for die drainficld for the on -site sewer system for Lot A. The area covered by the Easement conveyed in this Pamgroph is more particularly described as follows: Beginning at the Southeast corner of Lot B,.C•asterly for 8 feet, then 90 deg. South for 29 feet to the Southern Southwest comet of Lot C, then 90 deg. East for 70 feet to the Southeast comer of Lot C, then 90 deg. North for 10 red, then 90 deg. West for 60 feet, then 90 degrees North for 29 feet, then v-1 90 deg. West for IS feel to the West boundary of Lot C, then 90 deg. South T5" for 10 feet to POB a� 1.4 0� 14. The Owners of Lot C agree, warrant and covenant that neither they nor their heirs, successors, and/or assigns will construct, maintain, or cause to be maintained within the Easement area .described above any. structures, roads, driveways or trails for vehicular Q) traffic, or any other object that would impair the operation of the drainfields or ancillary piping, or their compliance with applicable law. Further, the Owners of Lot C agree, %varrant and covenant that neither they nor their heirs, successors, and/or assigns will excavate or compact natural soils within the Easement area. 15. The Owners of Lot A shall be entitled to an Easement to tbeir benefit over, under, and across Lot B. The Easement described in this Paragraph is for installation, mainteaance and repair of piping and equipment needed to maintain and operate die above -described drainfields located or to be located on or under Lot D. The Easement in this paragraph shall include nn area more particularly described as follows: Beginning at the Southwest comer of Lot B, then % feet East to the Southeast comer of Lot B, then 90 deg, Notch for I0 feet, then 90 deg. DRAINFIELD EASEMENTS — 4 9 N West for 96 fed to the Western boundary of Lot B, then 90 deg. South for 10 feet to POB The Owners of Lot B shall be entitled to use the Easement area described herein to the extent it is necessary and appropriate to operate their on -site septic system and/or to use and enjoy the Easements described in paragraphs 10 and 13, except as described elsewhere herein_ 16. The Owners of Lot B agree, warrant and covenant that neither they nor their heirs, successors, and/or assigns will construct, maintain, or cause to be maintained within the Easement area described above any structures, roads, driveways or trails for vehicular traffic, or any other object that would impair the operation of the drainfrelds or ancillary piping, or their compliance with opplicabie law. Further, the Owners of Lot B agree, warrant and covenant that neither they nor their heirs, successors, and/or assigns will excavate or compact natural soils within the Easement area. 17. Each owner of lots A, B, and C, respectively, shall be responsible for the costs of maintenance and repair of the dminfrelds and any ancillary equipment or piping of or related to the Easements described herein, except to the extent such costs result from an act or omission of another. When more than one owner sbares an Easement area, the owners shall cooperate to allow for each owner to obtain beneficial use of the Easement, to and shall not interfere with the right of the other owners to use and enjoy the Easements 94 described herein. eel 18. if reasonable maintenance, repair and service are not undertaken by the M C1 party responsible for such costs, such repairs may be made by the owner(s) of the scrvieut estate and the cost of such action shall paid by the owner(s) of the dominant estate upon Q written demand. If such costs are not paid within 10 days, they shall become a lien on il? the property of the dominant estate. and tic prevailing party shall be entitled to foreclose_. In the event of any dispute under or concerning these Easements, the prevailing party shall be entitled to recover all costs, including a reasonable attorney's fee. 19. The Easements for the beaefit of Lot A, shall terminate 100 days ater the owners of Lot A elect to liack up to any public sewer system. The Easement for the benefit of Lot B. shall terminate 180 days after the owners of Lot 8 elect to hook up to any public sewer system. "lire Easement for the benefit of Lot C. shall terminate 180 days after the owners of Lot C elect to hook up to any public sewer system. 11 ll 11 /1 D A1NF1ELD EASEMENTS -- 5 0 9 OWNERS OF LOT A M A_•S Christine K. Seek OWNERS OF LOT C ,�/ LI'M 2jZ-. Mark A_ Seek Christine K, seek STATE OF WASHINGTON } } COUNTY OF KING ) 0 0 OWNERS OF LOT B A. L-J, Mark A.•Seek. Christine K. Scdc OWNERS OF LOT D Mark A. Seek Christine K. Seek On this ^FK day of 1995. befare ma the undersigned, a Notary Public in and for the State of Washington, duly commissioned and swam, personally appeared .t'�.te -&\ • S ee- t- , and , Can` sip K ht - , who executed the within and foregoing DRAWFIELD EASEMENTS and aclmowledged the said instrument to be the free and voluntary act and deed ofsaid corporation fur the purposes therein mentioned, and on oath stated that he was authorized to execute said document IN WITNESS HEREOF, I have bereuato set my hand aad affixed my official scat the day and year written abovc t%.s o r,-% 0-k r u 44' NOTARY PUBLIC in nod for the State of Washington residing at .i,. �-A- t c. My Commission Expires: . Z -9 7 DRAINFIELD EASEMENTS -- 6 0 i 0 MI d O After retarding return to; e Y ' Marie A. Seek EXOSETAXNOTMOUIRED 13612 160th Ave. S.E. g Renton, Washington 99059 p a DRAINFIELD EASEMENTS These easements (hereizafter the 'Easements') arc entered into this Z6f�,day of January by and bctweca Mark A. Seek and Christine K. Seek, husband and wife, owners of Lots A, B, and C as described below, their heirs, successors, aid assigns; and Marie Seek and Christine K Seek, husband and wife, owners of Lot D as described below, their heirs, successors, and assigns. CO) N W9'li ESSETH O p1. The parties Seek own in fee certain real property in King County, Washington, more particulaty described as follows: U) Tract 1, Block 3, Cedar Paris Five Acre Tracts, aeeord'tag to the plat thereof Ai retarded in Volume 15 of Plats, page 91, in King County, Wasbington. (herciaa8cr designated as 'Lot 1') 2. The parties Seek have retarded an approved subdivision of Lot 1, Recording No. 9410250673, which divided Lot I into four lots. This document memorializes certain casements for on -site sanitation concerning the four lots, hereinaft designated Lots A, B, C, and D. 3. The first lot (hereiaaAer'Lot A') is more particularly described as folio Beg at the NW corner of Lot 1, thence S for 100 f along the W edge of Lot 1, thence 90 deg E for 96 9 thence 90 deg N for 100 £ thence 90 deg W along the N edge of Lot i for 96 f to POB; tog w an easement for on -site sanitation purposes ova Lots B, C, and D. 4. The sacmd lot (hemina(ter'Lot B') is more particularly described as follows: Beg at the NE coma of Lot A. thence S for 100 4 thence 90 deg E for 96 C thence 90 deg N for 100 4 thence 90 deg W along the N edge of Lot 1 DRAMFiELD EASEMENTS — 1 i3 er ens:, i s :Y i n M for 96 f to POB; tog w an casement for off -site sanitation purgases over Lots C and D; and subj to an easement for on site sanitation purposes to the benefit of Lot A. S. The third lot (hereivafler'Lot C") is more particularly described as foIIows: Beg at the NE comer of Lot B, thence S for 100 4 thence 90 deg E for 8 f, thence 90 deg S for 29 l thence 90 deg E for 70 & thence 90 deg N for 129 C thence 90 deg W along the N edge of Lot 1 for 78 f to POB; tog w an easement for on -site sanitation purposes over, under and through Lot D; and subj to easements for on site sanitation purposes to the benefit of Lots A and B. 6. - The fourth lot (bercinofier "Lot D') is more particularly described as follows: Beg at the NE comer of Lot C, thence E 330 f along the N edge of Lot 1, thence 90 deg S for 300 i thence 90 deg W for 600 f. thence 9D deg N for O 200 C thence 90 deg E for 200 & thence 90 deg S for 29 f, thence 90 deg E for 70 & then 90 deg N for 129 f to POB; subj to casements for on -site C) sanitation purposes to the benefit of Lots A. B and C; and subj. to an easement for utilities. 0 v] 7, The Owners of Lou A, B, and C are hereby entitled to Easements to their l77 benefit over, under and across Lot D. the Ea =cots dcscnbed herein are for installation and maintenance of a drainfield end ancillary piping of an on -site sewer system at such locations on Lot D that the Owners of Lots A, B, and C in an area of Lot D within the following boundaries: the Northeast comer of Lot D WesterIy to the Northeast comer of Lot C, then Southerly for 129 feet to the Southeast coiner of Lot C, then Easterly to a point 129 feet South of the Northeast Coma of Lot D, then Northerly to the point of beginning. provided, however, that any drainfield must be installed in accordance with ._ . oppticablo law, end shall net cause the removal or alteration of any currently a dsting structure, drainBeld or improvement. Ibe' se easements constitute covenants that rum with the land, and shall be transferred whether or not referenced in the deed of conveyance, and are binding on the successors in interest of both lots, their heirs, assigns and trans fe:rees. S. The Owners of Lot D agree, warrant and covenant that neither they nor their heirs, successors, andlor as .igas will construct, maintain, or cruse to be maintained within the drainfield area and related arsa as may be required by law. structures. roads. driveways or trails for vehicular trefc, or any other object that would impair the operation of the drainficlds or ancillary piping, or their compliance with applicable law. DkADIMLD EASEMENTS — 2 N M1 Further, the Owners of Lot D agree, warrant and covenant that neither they nor their heirs, successors, and/or assigns will excavate air compact natural soils within any dramficld area serving or to the benefit of Lots A. B. or C, ancillary piping, or related area that may be required by law. 9. The Ow nas of Lots A and B shall be entitled to an easement to their benefit over, under, and across Lot C. The Easements described in ibis Paragraph are for installation, maintenance and repair of piping and equipment needed to'maintain and operate the above -described dreinfields located or to be located on or under Lot D. The Easements described in this Paragraph shall occupy the southernmost 10 feet of Lot C for the entire southerly margin of the Lot, and shall be for the joint benefit of the owners of Lots A. B. and C. The Owners of Lot C agree, warrant aad covenant that neither they nor their hens, succors, and/or assigns will construct, maintain, or cause to be maintained within the eascm aat area may structures, roads, driveways or trails for vehicular traffic, or any other object that would impair the operation of the draiifields or macillary piping, or their compliance with applicable law. Further, the Owners of Lot C _ agree. warrant and covenant that neither they nor their bees, successors, and/or assigns ry will excavate or compact natural soils within the easement arena 10. The Owners of Lot A shall be entitled to an easement to their benefit over, Cunder, and across Lot B. The Easement described in this Paragraph is for rostaliation, (�! maintenance and repair of piping and equipment needed to maintain and operate the O1"4 abovrdesaibed drainfields located or to be located an or under Lot D. The Easements In described in this Parapaph shall occupy the southernmost 10 feet of Lot B for the entire 0? southerly margin of the Lot, and shall be for the joint benefit of the owners of Lots A and B. The Owners of let B agree, warrmtt and covenant that neither they not their heirs, successors, and/or assigns will construct, maintain, or cause to be maintained within the casement area any stractures, roads, driveways or trails for vehicular traffic, or any other object that would impair the operation of the drakfields or ancillary piping, or their compliance with applicable law. Further, the Owners of Lot B agree, warrant and covenant that neither they nor their heirs, successots, and/or assigns will excavate or compact natural natural soils within the easement area. It. Each owner of Lots'A, B, and C, respectively, sball be responsible for the costs of maintenance and repair of the drsinfteld4 and any ancillary equipment or piping of or related to the Easements dascrr'bed herein, except to the extent such costs result from as act or omission of the Owners of Lot D. 11 If reasonable maintenance, repair and service are not undemken by the parry sesponsiblc for such costs, such repairs may be made by the awner{s) of the servicat estate and the cost of such aeon shall paid by the owner(s) of the dominant estate up Lin written demand. If such costs are not paid within 10 days, they shall become a lien on DRAINFIELD EASEMENTS — 3 written demand If such costs are not paid within 10 days, they shall become a lien on the property of the dominant estate, and the prevailing party shad be entitled to foreclose, In the event of any dispute under or concerning these Easements, the prevailing party shall be entitled to recover all costs, including a reasonable attorney's fee. 13. =Mw Easements for the benefit of Lot A, shall terminate ISO days after the owners of lot A elect to book up to any public sewer system 'Ile Easement for the benefit of Lot B, shall terminate ISO days after the owners of Lot B elect to hook up to any public sewer system. The Easement for the benefit of Lot C, shall terminate 180 days after the owners of Lot C elect to hook up to any public sewer system. OWNERS OF LOT A OWNERS OF LOT B M4 ed M A. Seek - Christine K. Seek OWNERS OF LOT C Christine K Seek STATE OF WASIHNGTON } OWNERS OF LOT D '0"i (x j Mary A. Seek J Christine K. Seth } COUNTY OF KING ) On thisay of--I�nL199�, before me the undersigned, a Notary Public in and for the, State f Wan gton, aly commissioned and sworn, P nall.Y P and �vbo executed the within and foregoing DRAINFIELD EASEMENTS and acknowledged the said ins=amt to ba the free and voluntary act and deed of said corporation for the purposes therein mentioned, and on oath stated that he DRAINFIELD EASEMENTS — 4 IE s . W-" was authorized to execute said doc =mL IN WnMSS HMOF, I have hereto set my band and affixed my official seal the day and year written above. —7::rc}�� NOTARY P IC in mf gs thf State of Washington msiding at My Commimion Expires: DRAINFMLD EASEMENTS — 3 t4t.Z:t',^'rF4'�.s'('t. 02 After racardiag return to: Mark A- Seek 13611 160th Ave. S.E. Renton, Washington 99039 DRAINFIELD EASEMENT REVISION This revision an agmernenl pertaining to certain aammosta (hereinafter the 'Easomente or 'DRAfNFIELD EASEMENTS") entered into an the r) j day of dgs:k by and between Mark A. Seek and Christiae IL Seek, husband and wife, to owaero of Lots A. B. C and D. as dnoibed below, their heirs. sucoesoura, and essigra, and recorded in the manner required by law. This Revision rues with the land and bind all successors in interest This document. upon renrding, replaces and supersedes Daly the Easements as specifically set forth below, Except as apacificaliy set forlb below, the Easements remain unchanged - WITNESSR The Iegal description for the Lot A dmittiiold essaawal on, over and under Lot D, stated in Poragrsph 7 of [be DRAINFIELD EASEMENTS, is hereby superseded and tbplaoed with the following: Beginning el a point 100 rest West of the Northeast corner of Lot D along the Northern boundary of Lot D. than Wirt far 100 feet e1e139 the North bouoduy of Lai D, then 90 deg. Q South for 130 feet, then 90 deg. East fer 100 fact, thou 90 deg. North for 130 feet to PUB. t� to all other respects the DRAINFIELD EASEMENTS ramaic unchanged NREVISION DATED We o?rtd day or .4 of, f . 1993. OWNERS OF LOT A OWNERS OF LOT D k j-'a Seek � SeekP t •i� Cluisture K. Seek - Christine K. Seek .. . STATE OF WASHINGTON ) as COUNTY OF KING ) On thiojtj dayor Avt J S 'k , 199 ? , bofmo m o the undersigned, a Notary public in and for the Stale of Washington, daly commissioned sod swam, personally appealed Nth/ k A • Sack, and C L n sire lc Sum, who executed ilia within and foregoing DRAINFIELD EASEMENT REVIS[O_H sad acknowledged the said instrument to be the free and voluntary act for the purposes therein mentioned, and on .sib stated that they were authorimd to execute said document IN WITNESS HEREOF. I lava hereunto set my baud and anted my ollicial seal the day and year wiltnan above. NO L and for nwhrt oagou eA, kr aa7 SeA1+if My Commission Expires: 9� 2 —� 7 EASEMENT REVISION — I EXCISE TAX NOT REQUIRED Rs a DMatan �'`9eDtfi 4 161 OO At, sr• it CLARIFICATION OF DRAWER EASEMENT e --Zn 2 Isoh..fr'tr These easements (hereinafter the "EmmalW1 are entered into this 24th. day of February, t998, by and between Marls A. Seek and Christine K. Seek, husband and wife, as owners of Cats C and Lot D. as described below, d it heirs, successors, and assigns; and Mark A Seek and Ch nstin a IC Seel, husband and wife, owners of lot D as described below, their heirs, successors, and assigns. Thar Easements run with the land and bind all successors in interest to Lots C and D. 1. The parties Seer own in fee certain real property in King County, Washington, more particularly descn1W as Wows: Tract 1, Block 3, Cedar Party Fire Acre Tracts, according to the plat thueof recorded in Volume 15 of Phas, page 9 t, in King County, Washington- Except the North 100 feet of the West 192 feet. U 2. The Socks have recorded an approved subdivision of Lot 1, Recording no. 0 9410250673, whine ckvidod lot l into four lots The Socks tdw have recorded drain field easements for the three new lots on Lot D, recording number 9507291416, and this document is to clarify the Easaneni for Lot C. 3. The first Lot (hereinafter "Lot C) is more particularly descrbCd as folows: The North 100 feet of the East 79 fat ofthe West 270 foot AND the South 29 feet of the North 129 feet of the East 70 fat of the West 270 feet of Lot 1, Block 3, Cedar Park Five Acre Tracts, according to the plat thereof recorded in Voltum 15 of Plan, page 9t, in King County, Washington; as per King Cowley Engineer Subdivision Number 6846, recorded under King County Recording Number 9410250673. 4. The socond lot (hereinafter i ID") is more pareiadarly dew ibed as folkrwa: Lot 1, Block 3, Cedar Pork Five Acre Tracts, according to rho plat thereof recorded in Volume IS of Plats, papa 91, in King County, Washington; as per King County Engineer Subdivision Number 6846, recorded wrier King County Recording Number 9410250673. Except the The North 100 feet of1he Went 270 fled AND the South 29 feet of dye North 129 feet of the East 70 fed of the West 270 fed. 5. The Owners of Lot C are hereby entitled to on Easement for their baedrt am, under and across Lot D, as described hecdtt. The Foment described in thin Paragraph is far the inatailarion, opantion, repair and mainteamm of a draimfiaid turd mslated piping for the on -site sewer system for Lot C. 71a area covered by the Paaenwa for elm Lot C dn"eld is more particularly de ecrbed no follows: Be wrtring at a paim 200 feet Croon dw Nwdwow eornar of Lot D, thm Wct to rho Northeast corner of Lot C, them 90 deg. evA 119 feet, thm 90 deg. EaR fa 130 Feat, then 90 deg. North to Pewee of bcon nin& OU39 TAX HOT REOURED ri i3aoextls t1�tt 0 l3 ry;. CLARIFICATION OF DRAiNFIlEL,.D EASEMENT 5. The Easement far the bendit of Lot C. shall terminate 190 days after the owneri of Lot C darer to hook up to any public sewer system y. The owners of Lot D agree, warrant and covarmet that neither they nor their heirs, successors, and or assigns will construct, maintain, or cause to be maintained within the Easement area dewribed above as may be tequi"d by law: structures, roads, driveways or trails for vehicular IrsfFic, or my other object that would i:trpair The operation of the drainUd or anullary pipin% or their Compliance with applie`" law. Further the owners of Lai D agree, warrant and covessant that ndther they nor their hears, successors and or their assigns will excavate or compact natural soils within any draMeld Area saving or to the benefit of Lot C. ancillary piping, or rdated arms that may be required by law. OWNERS OF LOT C OWNERS OF LOT D i� t;1? a MARK A. SEEK MARK A SEEK CHRISTINE TC. SEEK CMS'TINE K. SEEK STATE OF WASHINGTON } 1 COUNTY OF ICING } On this 241h. day of February, 1990, before me the undersigpa k Notary Public in and for the State of WashiVmk duly eonuninkmed and swmn, paeatmlilr appearM Mask A Sexk, and Cluistine It Seek, who executed the within and faraping DRAINFIELA EASEMENTS and acknowledged the said instrument to be fife aW vohuawy act aM deed of said am pefalle 4or the-putpmerthertia rn=ti=d,-aadaa w4s-0uthosisad .4".d"v171lud4 , IN WITNESS HEREOF, I have he mme cat my hand and my afficial eW the: day and year 11t ip TuW f RY � � i 0 ; Pt18llC ARY PUBLIC id and for the State of e� , !tti f�►;�� r c�,a° x my C�omn4mon exyam —/ 01-470 i_iberty Grave Preliminary Plat King County SEPA Cherkiist REVISED 09103/03 Purpose of Checklist: 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 King County and 1 or any other agencies with jurisdiction to identify impacts from a proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help King County decide whether an EIS is required. A. BACKGROUND KECEf tfer 1. Name of proposed project, if applicable: Liberty Grove Subdivision SEP 0 3 2003 2. Name of proponent: KiNLi COUNTY LAND USE SERVICES S Lakeridge Development, Inc. 3. Address and phone number of proponent and contact person: Proponent: Lakeridge Development, Inc. PO BOX. 146 C 0 Renton, WA 98057 (426) 228-9750 Phone Contact Person: 4. Date checklist prepared: February 28, 2003 Mel Daley or Hans Korve DMP Engineering 726 Auburn Way North (253) 333-2200 Phone (253) 333-2206 Fax REVISED 09/03/03 5. Agency requesting checklist: King County, DDES 6. Proposed timing or schedule (including phasing, if applicable): Application Submittal ............................ March 2003 Public Hearing ........................................ December 2003 Council Action ........................................ February 2004 Engineering Submittal .......................... April 2004 Site Grading ........................................... May 2004 Final Plat ................................................. December 2004 FOR AGENCY USE ONLY L03P0006 ny 01-470 Liberiy Grove Preliminary Plat King County SEPA Checklist REVISED 09/03103 FOR AGENCY USE ONLY 7. Do you have any plans for future additions, expansions, or further activity related to or connected with this proposal? If yes please explain. No. 8. List any information you know about that has been prepared, or will be prepared, directly related to this proposal. The following information will be prepared and submitted under separate cover or is available in County files: a Rezone application - DDES o Level 1 Downstream Analysis REVISED July 11, 2003 • Conceptual Drainage Plan o Traffic Study, DN Traffic Consultants, February 7, 2003 o Wetland Report — Habitat Technologies, November 5, 2002 • Preliminary Recreation Plan o Traffic Study, DN Traffic Consultants, REVISED July 24-2003 o Drainage Adjustment Reguest. July 11 2003 o School Walking Route Analysis, August 18, 2003 • Addendum Wetland Reoori. H&S Consulting, July 18, 2003 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by this proposal? a Applicant has submitted a rezone application with this subdivision application. • Evendell Preliminary Plat approval (L01TY401) • Liberty Grove Contiguous Preliminary Plat Approval 10. List any governmental approvals or permits that will be needed for your proposal, if known. SEPA Threshold Determination King County Re -zone Approval King County Preliminary and Final Plat Approval King County Clearing and Grading Permits King County Building Permits King County 11. Give brief, complete description of the proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. SUBDIVISION The proposed preliminary plat will subdivide one parcels, totaling 4.84 acres located on tax parcel(s) 366450-0141 into 24 single-family lots, open space, and access tracts. Storm water facilities will be located on an adjacent property to the south known as `Liberty Grove Contiguous". This is also where the majority of the required recreational facilities will also be located. The project site is located on the west side of SE 16e Ave. SE This property currently has a single-family home and associated outbuilding. The out building is to be removed. 2 01-470 Liberty Grove Preliminary Plat K;ng County SEPA Checklist REVISED 09103/03 This project was original designed as one development with Liberty Grove Contiguous. All Traffic, storm water and recreation requirements have been addressed as part of the larger project, but presented with each individual application. The associated re -zone application has been rejected by Staff and the applicant has submitted a TDR proposal to maintain the proposed density, REZONE This project and its contiguous neighbor include a proposed rezone from R-4 to R-6. This proposed rezone would be consistent with the current comprehensive plan designation. This proposal will also be consistent with the development patterns of the surrounding area. The plat of Evendeil located west of the Liberty proposal is currently being rezones from R-4 to R-6 as well. Since the original application Staff has withdrawn their support of the re -zone application In response the applicant has submitted documentation to utilize the Counties TDR program to attain the proposed lot density. No additional impacts will result form the use of the TDR program. 12. Location of the proposal. Provide 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 available. The subject proposal is situated on three parcels totaling 4.84 acres, located within the jurisdictional boundaries of unincorporated King County in the NE'/. of Section 14 Township 23 North, Range 5 East W.M. The site is located on parcel(s) 366450-0141. Please refer to the Preliminary Plat map for the legal description, site plan, vicinity map, and topographic map. The existing home is located at 13536160ei Ave. SE. B. ENVIRONMENTAL ELEMENTS 1. Earth General description of the site (circle one): flat , rollin , hilly, steep slopes, mountainous. The project site is located on the west side of 160t'' Ave SE, in unincorporated King County. The property is generally flat, with a slight slope to the south. A review of records indicates that the property may have been filled prior to 1985, with ditches installed around the east, west and south sides. The property is currently maintained as lawn and residential landscaping. There no streams or wetland features on this portion of the project. b. What is the steepest slope on the site (approximate percent slope)? According to the field topographic survey, the steepest slope on the site is approximately 5% to 10% located northeast corner of the project site. FOR AGENCY USE ONLY 01-470 Liberty Grove Preliminary Plat King County SEPA Checklist REVISED 09/03103 FOR AGENCY USE ONLY c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, and muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. According to the US Soli Conservation Service Soil Map, the site is primarily Alderwood series (AgC) d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. According to the King County Sensitive Areas Map, the property contains no hazard areas. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Grading of the site will be necessary to modify the site for stormwater drainage flow. The exact quantity of grading is not known at this time, however, it is anticipated that the grading activities would be designed to balance and not require import or export of soil. Grading of the individual home sites will involve the excavation of approximately 150 to 200 CY of cut and/or fill. These issues will be addressed during the building permit phase. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Some erosion could occur on -site as a result of construction activities; however, temporary erosion and sedimentation control measures to be approved by King County will be employed to reduce erosion impacts. All construction during the wet season will comply with the 1998 Surface Water Design Manual, Sections 5.4.8 and D.4.2.1A concerning site coverage techniques. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Due to the preliminary nature of the plans, the exact percentage of impervious surface associated with this project is currently unknown. The subject proposal will not exceed the maximum impervious surface area as required by KCC 21A.12.030 h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: During construction, the contractor will follow an approved temporary erosion and sedimentation control plan meeting KCC standards. Typical measures, which may be employed, include the use of silt fences, straw bales, and temporary storm drainage features. Hydra seeding exposed soils and cleared areas after construction will also reduce the potential for erosion. All construction during the wet season will comply with the 1998 Surface Water Design Manual, Sections 5.4.8 and D.4.2.1A concerning site coverage techniques. ii W Ot-470 Liberty Grove Prefiminary Plat King County SEPA CtrerxJst REVISED 09/03/03 2. Air a.. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, and industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction: Emissions and dust particulates generated primarily by construction equipment will be produced during the construction phase of this project. The amount of emissions to the air will be minimal and will occur during the actual construction of the development. Lona Term Air Quality: Long-term air impacts would be those typically associated with residential land uses. Sources of long-term emissions and odor could include vehicle emissions from increased vehicle use generated by the new residential units and emissions from wood burning fireplaces (if permitted). The additional vehicular emissions in these areas are not anticipated to concentrate and therefore are not anticipated to create a health hazard to the residents or surrounding areas. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. No. c. Proposed measures to reduce or control emissions or other impacts to air, if any: If particulates become suspended during construction, frequent watering of the site during the construction phase of the project would be used to help control dust and other particulates generated on the site. This will be accomplished in accord with Section 6.4.7 of the 1998 Surface Water Design Manual. 3. Water a. Surface: 1) Is there any surface water body on or in the immediate vicinity of the site (including year-roundand seasonal streams, saltwater, lakes, ponds, and wetlands)? if yes, describe type and provide names. If appropriate, state what stream or river it flows into. According to the King County Sensitive Areas Folio, there are no recorded streams or other water bodies on the subject site. 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. No FOR AGENCY USE ONLY 01-470 Liberty Grove Preliminary Plat King County 5EPA Checklist REVISED 09103/03 FOR AGENCY USE ONLY 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. NA 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan According to the King County Sensitive Areas Maps, no portion of the site lies within the 100-foot flood plain. 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. ►0 b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, agricultural; etc.) Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None known at this time. 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 runoff will primarily be generated from roadways, residential structures, and associated driveways. Stone water will be collected in catch basins within the roadways and/or tight -lined from residential roof tops and conveyed to a proposed detention facility located in the plat of Liberty Grove Contiguous, to the southeast. Storm water will be transferred along 160th Ave. SE and processed in the single stormwater facility located on parcel - 0090. Discharge from the proposed facility will be piped into the existing storm water system in the area. Refer to the attached Level 1 storm water report for complete details. 2) Could waste materials enter ground or surface waters? If so, generally describe. C. 01-470 Liberty Grove Preliminary Flat King CO my SF -PA Checklist REVISED 09103/03 FOR AGENCY USE ONLY Some pollutants normally associated with residential development could enter the surface water; however, the amount would be minimal since the on -site drainage will be conveyed to a water quality and detention facility in conformance with the 1998 Surface Water Design Manual. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: The storm water runoff will be collected and conveyed to a detention facility(s) that will be designed and constructed in conformance with the 1998 Surface Water Design Manual. 4, Plants Check or circle types of vegetation found on the site: deciduous tree: alder, maple, aspen, other: evergreen tree: fir, cedar, hemlock, pine, other sh_ rubs grass pasture crop or grain wet soil plants: cattail, buttercup, bullrush, skunk cabbage water plants: water Illy, eelgrass, milfoil, other: b.. What kind and amount of vegetation will be removed or altered? Section A of the proposed subdivision, located on the west side of 160t' Ave. SE is dominated by well managed and maintained lawn and other ornamental landscaping associated with the existing residence. Some of the existing ornamental landscaping will be removed during the development process as will any remaining trees or shrubs. c. List threatened or endangered species known to be on or near the site. There are no known threatened or endangered plant species on or near the site. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The proposed preliminary plat anticipates retaining existing trees when possible. The new single-family residences will provide new landscaping including lawns, shrubs, and ornamental trees. Native vegetation will be utilized, where appropriate. Some additional trees and vegetation may be incorporated into the recreation area and storm water facility where appropriate. 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, other: 7 01-470 Liberty Grove Prelimnary Plat King County SEPA Checklist REVISED 09I03103 FOR AGENCY USE ONLY mammals: deer, bear, elk, beaver, other: rodents. raccoons. fish: bass, perch, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. None Known. c. Is the site part of a migration route? If so, explain. No. d. Proposed measures to preserve or enhance wildlife, if any: Installation of native landscaping throughout the plat area will provide coverage and habitat for urban tolerant wildlife. Typical landscaping is likely to include rhododendron, azalea, boxwood, magnolia, cedar, hemlock, blue spruce, cherry, plum, maple and ash. 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. Electrical energy will be the primary source of power serving the needs of the project and natural gas will be made available for the purpose of heating and other needs associated with residential living. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. 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: The residential buildings that will be constructed as a result of this project will meet or exceed the applicable single-family residential energy conservation / consumption requirements in King County and the Uniform Building Codes. 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. It is unlikely under normal working conditions that environmental health hazards would be encountered. All project -related construction will meet or exceed current, County, State and Federal laws. 1) Describe special emergency services that might be required. 8 Ri-470 Liberty Grcve Pre!imira-, Plat King County SEPA Checklist REVISED 09/03103 In the event that environmental health hazards are encountered or occur during construction, all appropriate precautionary measures will be employed. Any emergency situation would be addressed by the existing resources of Fire District #26. 2) Proposed measures to reduce or control environmental health hazards, if any: State regulations regarding safety and the handling of hazardous materials will be followed during the construction process. Equipment refueling areas would be located -in areas where a spill could be quickly contained and where the risk of hazardous materials entering surface water is minimized. On -site management will be equipped with mobile communications equipment at all times to contact emergency services in the event of an incident. b. Noise 1) What types of noise exist in the area, which may affect your project (for example: traffic, equipment operation, other)? The dominant source of noise in the project vicinity is traffic along 160"' Ave. SE, which bisects the proposed project. 2) What types and levels of noise would be created by or associated with the 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. Short term impacts would result from the use of construction equipment during site development. Construction would occur during permitted construction hours and in compliance with King County noise standards. 3) Proposed measures to reduce or control noise impacts, if any: Construction activity will be limited to permitted construction hours and construction equipment will not be allowed to idle for continuous periods of time, which will help to mitigate the impacts of potential construction noise. Hours of operation will be posted on -site. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The site(s) are currently used as single family residences. One of the existing properties contains a bam and other outbuildings associated with the keeping of live stalk. Adjacent land uses consist of a low density single- family residence. The existing plat of Liberty Lane is located to the east and the proposed plat of Evendell is located to the west. b. Has the site been used for agriculture? If so, describe. It is not believed that the site was utilized for agricultural production in the past. c. Describe any structures on the site. E FOR AGENCY USE ONLY 01-470 UbartyGrcve Preliminary Plat King County SEPA Checklist REVISED 09/03103 FOR AGENCY USE ONLY The project site is divided into two portions. One portion is located on the west side of SE lWh Ave. SE , Section "A"(366450-0141). This property currently has a single-family home and associated outbuilding. The outbuilding is to be removed as part of this proposal. Y 3,270 SF home located at 13635 160TH AV SE 98055 (366450-0141 d. Will any structures be demolished? if so, what? Yes. One of the homes and all of the out buildings are proposed for removal. e. What is the current zoning classification of the site? The project site is currently zoned R-4. The applicant has submitted a proposal to rezone the property as R-6 or utilize the Counties TDR Program to achieve the desired lot count. f. What is the current comprehensive plan designation of the site? According to the King County Comprehensive Land Use Plan, the area is designated Urban Residential — R 4-12. This designation would support the proposed rezone of the property. g. If applicable, what is the current shoreline master program designation of the site? Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. According to the 1990 King County Sensitive Areas Folio no part of the property has been designated as sensitive. i. Approximately how many people would reside or work in the completed project? Assuming 2.5 persons per household, approximately 60 people would reside in the proposed project. j. Approximately how many people would the completed project displace? 0 k. Proposed measures to avoid or reduce displacement impacts, if any: The proposed project will provide 23 new, housing units, 24 total. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The project will be developed in accordance with applicable King County development and land use codes to ensure the project is consistent with the goals and policies of the Comprehensive Plan and applicable development 10 0i-470 Liberty Grows . Preliriinary Plat King Courty SEPA checklist REVISED 09/03/03 FOR AGENCY USE ONLY regulations in effect at the time of a complete Preliminary Subdivision application. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. Approximately 23 (24 total) new middle -income housing units will be provided. b. Approximately how many units, if any would be eliminated? Indicate whether high, middle, or low-income housing. Two middle income homes will be removed. c. Proposed measures to reduce or control housing impacts, if any: Adherence to the comprehensive plan and growth management planning goals of King County would ensure that housing development is consistent with those policies stated in the applicable land use plan. 23 new homes will be built. 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 specific building plans are included with this project; however, it is anticipated that houses built on the site would conform to the King County development regulations and be limited to a height of 36 feet in accordance with 21 A.12.030. b. What views in the immediate vicinity would be altered or obstructed? Development of the site would result in a change to the visual character of the site for the nearest existing residences and roadways to that of a single- family neighborhood area. No significant views would be obstructed. c. Proposed measures to reduce or control aesthetic impacts, if any: The site plan has been developed to provide a site design layout consistent with the development regulations in place for the R-4 and/or R-6 zone. The proposed project incorporates landscape and open space areas in accordance with King County development regulations. 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? Light and glare from the completed project is anticipated to be that typically generated by single-family residences, mainly occurring during the evening hours, and be associated with vehicle headlights, streetlights and residential unit lighting. II 01-470 Liberty Grove Preliminary Plat Kong County SEPA Checklist REVISED 09/03/03 FOR AGENCY USE ONLY b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. To the best of our knowledge, there are no landmarks or evidence of any significant historic, archaeological, scientific or cultural resources known to be on or next to the site. c. Proposed measures to reduce or control impacts, if any: If any such historic or cultural evidence is encountered during construction or installation of improvements, work would be halted in the area and a state -approved archaeologist/historian would be engaged to investigate, evaluate and/or move or curate such resources, as appropriate. 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. The proposed project will take primary access from 160th Ave SE. Please refer to the attached Traffic Study for more details. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? No. The nearest transit stop is located near the corner of SE 128th Street and 16e Ave SE, approximately .46 miles away from the project site. The Metro bus rout providing service to that stop is #111. There is no bus shelter provided at that location. c. How many parking spaces would the completed project have? How many would the project eliminate? None. The proposed project will provide parking in private driveways, garages and on -street parking. 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). Yes, the .troposed project will require improvement of public right-of-way along 160 Ave. SE & SE 136P Street and construction of internal circulation roads and access tracts. All roads will be designed and constructed to current King County standards. 160th Ave. SE will be designed to the Urban Collector standard. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. 13 41-470 Liberty Grove Preliminary Plat King CoUnty SEPA Checklist REVISED 09/03103 FOR AGENCY USE ONLY Assuming 10 trips per household per day, the completed project will generate approximately 240 vehicular trips per day. Please refer to the attached Traffic Report for specific details. g. Proposed measures to reduce or control transportation impacts, if any: The applicant or subsequent owner(s) will comply with Title 14 of the King County Code, which contains provisions for payment of MPS (Mitigation Payment System) Fees. Applicant will either pay the MPS fee at the time of final plat application or at the time of building permit application. If the first option is chosen, the fee paid will be the fee in effect at the time of plat application, and a note will be placed on the face of the plat stating, "All Mitigation Payment System Fees required by Title 14 have been paid." If the second option is chosen, the MPS fee paid will be the fee in effect at the time of building permit application. Contributions to projects listed in the MPS program may receive credit towards the MPS payment due. The estimated MPS fee for this project at the time of application will be, based on a 23 NEW (24 total) unit subdivision. The project lies within MPS zone # 452, which has a fee of $2,139 per new single-family unit. Based on 23 new units, the projected total MPS fee is $49,197. 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 completed project would result in an increased need for police and fire protection as well as emergency medical service. Additional recreational and school facilities will also be required to address the increase in demand for recreational opportunities. Extension of public sewer and water service will also be required. b. Proposed measures to reduce or control direct impacts on public services, if any. The project will be designed and constructed with adequate water pressure, properly located fire hydrants and roadways constructed to allow adequate access for fire, medic and police protection vehicles. Increased property valuation will result in increased taxes generated to support public services. The proponent will pay necessary school and traffic mitigation fees to offset the potential impacts to the school and transportation system. The project is located in the Issaquah School District #411. The current school impact fee is $3,924 per single-family unit. Assuming 23 new units (24 total), the total school impact fee would be $90,252. 14 01-470 liberty Grove Preliminaryflat King County SE-- PA Checklist REVISED 09/03103 Recreational facilities will be constructed on site in accordance with the requirements of 21A.14 to offset the potential impacts on the existing recreational system or a fee -in -lieu of those facilities will be offered. 16. Utilities a. indicate utilities currently available at the site: Electricity, Natural Gas, Water, Telephone, Sanitary Sewer, Septic System, Refuse Service, Other. b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. Water System — Sanitary Sewer System — Storm Water — Electricity Natural Gas: Telephone: Refuse Service: Cable TV: Water District #90 City of Renton — Extension of a 10" to 12" sewer main in SE 136d' St, 10" sewer main in 962nd St SE., and a 8" sewer main in 158d' & 160d' Ave. SE. King County Puget Sound Energy Puget Sound Energy 4west Robanco AT&T Broadband All underground service will be constructed in conjunction with road and storm drainage construction activities C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Z' Signature: S /' Hans A. Korve DMP., INC Planning Manager Date Prepared: February 28, 2003 REVISED September 3, 2003 15 FOR AGENCY USE ONLY dmp, inc. (FORMERLY DALEY ENGINEERING CO.)BE -DBE ���1�,. ", r v15"? , Yr 4 t-.' S' TYn1 ; ,r.-vv P��,.•� +�'r+ %-.:,"�«.�R:-:r"u+...:-s...�okY,$ ,F�.., f,, 4;7 a..,.� •.. �! ,..`�; �..', ..G�s7s5i..11[i�:.Pt f:�'sews�-hlr-.ems^���vY."1, .� ..,tP•`i.,.>x:', x., i August 18, 2003 DALEY-MORROW-PO BLETE,INC. ENGINEERING -PLANNING -SURVEYING 726 Aubum Way North Aubum, WA 98002 (253)333-2200 FAfifl 333-2206 EIVIFr) Karen Scharer SEP 0 3 2003 King County DDES 3 po C a 5Klly �,uuIv fY 900 Oaks Dale Ave. SW Renton, WA 98055-1219 LAND USE SERVICES RE: Liberty Grove (LG) & Liberty Grove Contiguous (LGC) L03P005 -006 Dear Ms. Scharer: A survey of the walking conditions in and around the proposed preliminary plats of Liberty Grove and Liberty Grove Contiguous was conducted on Wednesday, July 2, 2003. The survey of walking routes was based on information provided by the Issaquah School District Transportation Department, regarding probable walking routes for school children. Other information included.the current location of bus stops for each of the three grade levels. The information gathered has been categorized by grade level. Some photographs are available as examples of described conditions. Not every segment of the surrounding road network was photographed. The breakdown is as follows: Liberty High School: Of all the schools providing educational services to the proposed plats, Liberty High School is the closest institution. Access to the upper fields of the High School was achieved at one time by walking south on 162"d Ave. SE, approximately one block, and continuing east on 137t Place, to the end of the cuWe-sac. This route assumes that frontage improvements will be completed as part of the Liberty Grove (LG) and Liberty Grove Contiguous (LGC) plats. Both sides of 137 h Place have sidewalks that were constructed as part of the nearby Liberty Lane subdivision. In recent years, a fence has been constructed at the end of the 137d' Place cul-de-sac which separates the existing walking path and the upper fields of the High School. Tract "A" of the Liberty Lane Plat was not originally designated as a walking path. It was originally established as a Storm Water facility and the walking path likely grew out of the original access road to the pond. The removal of that fence and the construction of a gate would facilitate safe walking to and from the school. However, the existing Tract "A" would have to be modified to provide for public access over the existing storm water tract No other safe walking routes exist between the proposed development and the High School. Maywood Middle School: Maywood is located several blocks south of Liberty High School, on 16&h Ave. SE. An 8' asphalt shoulder with fog line extends west from the school entrance, along SE 140 Street to 161P Ave SE. A combination of asphalt and cement sidewalk extend north from the intersection, towards LG & LGC. Unfortunately, the improvements terminate at the top of the hill, at approximately SE 142"d Place. From that point north, there are no notable improvements. Safe access is possible however, from 16e Ave. SE, if children were allowed to travel through Liberty High School as described above. Assuming access to the High School grounds, Maywood student could then exit the High Schools east gate, onto 161P Ave SE. and travel south. The shoulder improvements on 168th Ave. SE vary from 4 to 5 feet of asphalt and/or compact gravel, with a fog line. During the site visit, several area children of varying ages were observed traveling along 168 Ave. SE. While children are currently using the existing improvements along 168"' Ave. SE, they do not meet the approved safe walking route standards preferred by the School District sand the King County Roads Division. Preferred improvements include an 8' paved shoulder with fog line or extruded curb. if access to the High School grounds is not possible, then no safe walking route to and from Maywood Middle School is possible. Briarwood Elementary: Briarwood Elementary is located northeast of Liberty High School, approximately 3 blocks. An 8' asphalt shoulder with C-curb extends from the school entrance on SE 134"' Street to the intersection with 16e Ave. SE. An 8' asphalt shoulder, with fog line, continues south from that intersection towards the entrance of Liberty High School. From that point, there are no safe walking routes connecting the proposed plats and the school. Assuming access to the High School grounds, Bdarwood student could then exit the High Schools main entrance or east gate, onto 168h Ave SE. and travel north. If access to the High School grounds is not possible, then no safe walking route to and from Elementary School is possible. Bus Stop: The Issaquah School District has identified an existing Elementary bus stop at the intersection of 160"' Ave SE and SE 131P Street. The nearest High and JR High School stops are located at 162"d Ave. SE and SE 130'h Street. Both busses for the High and JR High School pass through the intersection at 1W Ave SE and SE 1361h Street. Given the proposed development of LG & LGC, combined with the approved plat of Evendale and the proposed plat of Hamilton Place, one block to the north, the School District has agreed to establish a combination bus stop for all three grade levels at 160'h Ave SE and SE 136'" Street A combined bus stop at this location would provide safe access to transportation for all four proposed projects and the existing children in the Denyhurst neighborhood. The applicant is willing to work with the School District to provide whatever additional improvements are necessary to accommodate the proposed combination bus stop. Requested Improvements: In several conversations with representatives of the Issaquah School District, at no time has the District indicated that they would require off -site improvements to be constructed as part of the LG or LGC proposal. The focus of all conversations to this point has been the location and design of the proposed combination bus stop. Conclusions: After reviewing the available information, conducting a site visit and communicating with representatives of the Issaquah School District, we have found that there are limited possibilities to provide safe walking routes for school children in the area surrounding the proposed plats. There -is, however, an opportunity to work with the school district to develop a combination bus stop at the intersection of 160 Ave SE and SE 136P Street that will service several adjacent projects in addition to the proposed preliminary plats of LG and LGC. If you have any questions, please contact me at (253) 333-2200. Sincerely Hans Korve Planning Manager DMP Inc. LIBERTY GROVE & LIBER'TY GROVE CONTIGUOUS School Walling Route Analysis A field reconnaissance was conducted on July 2, 2003 to determine the existing condition of likely school walking routes. The attached photo phs re r ent a ple of the existing conditions surrounding the proposed preliminary s an Los P Los PO (3 Gc- Entrance to Elementary School. Note 8' Asphalt Shoulder LG & LGC School Walking Route Pictures 1 UR�Sonsulfing July 18,2003 SEP 'D 3.2003 Mr. Wayne Jones hirvu L;oUNTY Lakeridge Development Inc# p ,USE SERVICES P.O. Box 146 Renton, Washington 98057-0146 LmSP000B L6 Q i . I ? �'� ��' -qom f n 11 # cc, RE: Additional Sensitive Area review for Liberty Plat, King County submittal L03P005 & L03P006 Dear Mr. Jones, In response to the letter of from King County staff I have conducted an additional review to assess the area cited in the letter as requiring additional assessment. Please consider this an addendum to the WETLAND EVALUATION AND DELINEATION REPORT AND WILDLIFE HABITAT EVALUATION, LAKERIDGE PROJECT SITE, by Habitat Technologies, November 5, 2002. The area noted in the response is located in the southeast portion of the eastern portion of the project site (see attached map). Onsite assessment of the project site following the procedures outlined in the Washington State Wetlands Identification and Delineation Manual (Wash. Manual) and the Corps of Engineers Wetlands Delineation Manual 0 987 Manual) resulted in the identification of NO area that exhibited hydric soiis, wetland hydrology, and hydrophytic vegetation consistent with the established criteria of both the Wash. and 1987 Manuals. This area had been impacted by prior grazing and pasture management activities, and active and on -going lawn and pasture management. ONSITE EVALUATION - WETLANDS Onsite assessment and evaluation was conducted on July 7, 2003. Wetland assessment within the project site followed the methods and procedures outlined in both the Wash. Manual and the 1987 Manual. The site is an open meadow, until recently utilized as a livestock pasture. A road drain passes under 162nd Avenue at the junction with 136th Street., This roadside ditch continues south along the side of the road thru approximately the north one-half of the project site. At approximately the northern boundary of the pasture, it turns slightly southeast and transacts the southeastern portion of the project site. Rom the southern boundary of the project site, a ditch conveys surface water west to a culvert south of the eastern portion of the project site. P. 0. Box 731695 e Puyallup WA 98373 02154 Lakeridge - 1 253-732-6515 mheckert@qwest.net 30-POT-W land Report FIELD OBSERVATION o Vegetation A mature managed pasturetlawn plant community dominated the evaluation site. This plant community was composed of a wide variety of invasive and seeded grasses. This plant community included colonial bentgrass (Agrostis tenuis), meadow foxtail (Alopecurus pratensis), velvet grass (Holcus lanatus), reed canarygrass (Phalaris arundinacea), bluegrass (Poa spp.), fescue (Festuca spp.), orchardgrass (Dactylis glomerata), quackgrass (Agropyron repens), bracken fern (Pteridium aquilium), western yarrow (Achillea lanulosa), thistle, cats -ear (Hypochaeris spp), softrush (Jun_cus effusus), tansy (Tanacetum vulgare), dandelion (Taraxacum olfcinale), buttercup (Ranunculus repens), curled* dock (Rumex crispus) and clover (Trifolium spp.). These mature trees formed open stands across the treed portion of the site. A few mature Douglas -fir trees were present along the western boundary. Additional tree species occurring onsite included Western red cedar (Thuja plicata) Sapling red alder (Alnus rubra) were colonizing the meadow, black cottonwood (Populus trichocarpa), cherry (Prunus spp), and cascara (Rhamnus purshiana). This plant community was identified as non-hydric (i.e. typical of uplands) in character. o Soils As identified by four sample plots (data attached) throughout the project site, the site exhibited a soil profile typical of the Alderwood soil series. The soil was defined as gravelly sandy loam with a soil matrix color of dark brown (10YR 312) to brown (10YR 414). These soils did not exhibit redoximorphic features such as prominent soil mottles, oxidized root channels, or glayed soil layers within the first 20 inches of soil depth. Soils withirr this area did, not exhibit " hydric" characteristics. o Hydrology Along the western boundary of the evaluation site, evidence of the passage of water was documented. A culvert passed under 162nd Ave. (flowing west). This surface drainage was contained in a ditch flowing south along the road to approximately half way through the evaluation area. The drainage curved slightly to the west and through the southern portion of the site. In the southern portion, the drainage ditch became less defined, and continued to the southern boundary in an undefined channel Swale. From the southern boundary, the surface flow was collected into a defined ditch which flowed west to a culvert inlet. This drainage appeared to be created within an upland area, as evidenced by the soils, and was assuming hydric characteristics as a result of the direction of roof and street runoff through the site. 02154 Lakeridge - 2 Addendum Wetland Report FINDINGS AND CONCLUSIONS Onsite assessment was completed on July 7, 2003 following the methods and procedures defined within both the Wash. Manual, the 1987 Manual, and the WDNR Forest Practice Rules. This assessment identified that no area on the site, or within the immediate vicinity of the project site, exhibited all three of the established criteria for designation as 'wetland". The entire site would be best defined as upland unmanaged pasture. No area was identified onsite that would meet the criteria for designation as a "stream." Thank you for allowing H & S the opportunity to assist with this project. Should you have any questions or require additional assistance please call me at 253 732-6515. Sincerely, Mark Heckert Senior Wetlands Ecologist 02154 Lakeridge - 3 Addendum Wetland Report Job Number: 02164 Data Form Cite Routine Wetland Determination Wetland Data Point: SP 201 ProlecNSite: Liberty Lakeridge Date: July 07, 2003 ApplicantlOwner: Lakridge Development County: King Investigator. M. Heckert _ _ _ _ State: WA__ [X) Do normal circumstances exist on the ssite? Community ID: Meadow [ J Have vegetation, soils, or hydrology been disturbed? Station ID: [ ] Is the area a potential problem area? Plot ID: Vegetation Dominant Species Common Name % Cover_ Indicator Ilerbac X Agrostis Tenuis Sibth. Bentgrass,Colonial 50 FAC X Dactylis glomersta Grass,Orchard 50 FACU SUMA Rubus process Blackberry,Himalaya 10 NI LX 25-----FACU'.�_T _PsetoggL-gaManxiesii_(Mirbel)._-----FirD?_Ugias._.._.___-.______ % Species that are OBL, FACW, or FAC (except FAC-): 33 Cowardin Classification: Remarks appears to drain well Hydrology Primary Wetland Hydrology Indicators Secondary Hydrology Indicators [XJ Recorded Data (describe in remarks) [ ] Inundated [ ] Oxidized root channels ( ] Stream, Lake, or Tide Gage [ ] Saturated in upper 12 inches [ ] Wafter -stained leaves [ ] Aerial Photograph [ ] Water marks [ ] Local soil survey data [ ) Other (describe in remarks) [ ] Drift lines [ ] FAC-Neutral test [ ] Sediment deposits [ ] Other (explain in remarks) Field Observations: I ] Drainage patterns in wetlands Depth of Surface Water(in.): 0 Depth to Free Water in Pi#(inJ: a24 Depth to Saturated Soils(in.): a24 Remarks up slope of ditched swele Solis Depth Hor. Matrix Mottle I (in.) Color o or 0-8 A 10YR 312 8-16 B 1 OYR 414 Hydric Soils Indicators [ ] Histosol [ ) Histic Epipedon [ ] Sulfidle Odor [ 1 Probable Aquatic Moist Regime [ ] Reducing Conditions [ ] Gleyed or Low-Chroma Colors Unit Name: Drainage Ciass: Remarks a ars to drain well Wetiand Determination Texture, lance ontrast Structure, etc. ��- Sandy Loam pebbles Coarse Sandy Loam [ } Concretions [ ] High Organic % in Surface Layer [ ] Organic Streaking [ ] Listed on Local Hydric Soils List [ ] Listed on National Hydric Soils .List .. . [ ] Other (explain in remarks) Taxonomy: [X] Field Observations match map [ ] Hydrophytic Vegetation Present (] This Data Point is a Wetland [ } Hydric Soils Present [ ] Wetland Hydrology Present Remarks wetiand criteria NOT met appears to drain weil Page 4 of 4 Job Number: 02154 Data Form City: Routine Wetland Determination Wetland Data Point: SP 202 ProjecUSlte: Liberty Lakeridge Date: July 07, 2003 Applicant/Owner: Lakridge Development County: King Investigator: M. Heckert _ State: WA — [X] Do normal circumstances exist on the site? _ _ Community IIT Meadow [ ] Have vegetation, soils, or hydrology been disturbed? Station ID: [ ] Is the area a potential problem area? Plot ID: Vegetation Dominant S epcles — Common Name % Cover Indicator - Herbaceaus X Lotus corniculatus Trefoii,Birds-Foot 40 FAC Shrub X Rubus procerus Blackberry.Himalaya 90 NI X Alnus rubra Alder,Red ...-.-------------. --50 FAC _ 6A Species that are dBL, FACW,-or FAC (except FAC-): 66 Cowardin Classification: Remarks no sign of ponding Hydrology Primary Wetand Hydrology Indicators Secondary Hydrology Indicators [X] Recorded Data (describe in remarks) [ ] Inundated [ ] Oxidized root channels [ ] Stream, Lake, or Tioe Gage [ ] Saturated in upper 12 inches [ ] Water -stained leaves [ ] Aerial Photograph [ ] Water marks [ ] Local soil survey data [ ] Other (describe in remarks) [ ] Drift lines [ ] FAC-Neutral test Field Observations: } } Sediment deposits [ ] Other (explain in remarks) Depth of Surface Water(in.): 0 [ ] Drainage patterns in wetlands Depth to Free Water in Piton.): a2.4 Depth to Saturated Soils(in,): a24 Remarks in swaie appears to drain well Soils Depth Hor. Matrix Mottle / 2nd Mottle Texture, in. Color Color Abundance n rest Structuetc,_,_ 0-8 A 10YR 312 8-16 A/B 10YR 413 10YR 5/6 few faint Hydric Soils Indicators [ j Histosoi ] ] Concretions [ ] Hisfic Epipedon [ ] High Organic % in Surface Layer [ j Sulfidic Odor [) Organic Streaking [ ] Probable Aquatic Moist Regime [ ] Listed on Local Hydric Soils List [ ] Reducing Conditions [ ] Listed on National Hydric Soils List [ ] Gleyed or Low-Chroma,Colors [ ] Other (explain in remarks) Unit Name: Taxonomy: . Drainage Class: [X] Field Observations match map Remarks ditched swale Wetland Determination [X] Hydrophytic Vegetation Present [ ] This Data Point is a Wetland [ ] Hydric Soils Present [ ] Wetland Hydrology Present Remarks wetland criteria NOT met appears to drain well pony 'A of d Job Number: 02164 Data Form City: Routine Wetland Determination Wetland Data Point: SP 203 Project/Sits: Liberty Lakeridge Date: July 07, 2003 Applicant/Owner: Lakridge Development County: King Investigator: M. Heckert State: WA [X] Do normal circumstances exist on the site -—_•_—._._•_._..._�__ �— Community ID: Meadow [ ] Have vegetation, soils, or hydrology been disturbed? Station ID: [ ] Is the area a potential problem area? Plot ID: Vegetation DominantSpecies Common Name _ % Cover Indicator-_. Herb X Phleum pretense Timothy 30 FACU X Juncuseffusus Rush,Soft. 40 FACW+ X Seneafo jacobaea Tansy ragwort 20 UPL X Lotus comiculatus Trefoil,Birds-Foot 30 FAC __Plantac]omalor__Y Plantain,Common 10 FAC+_____ % Species that are OBL, FACW, or FAC (except FAC-): 50 Cowardin Classification: Remarks Hydrology Primary Welland Hydrology Indicators Secondary Hydrology Indicators [X] Recorded Data (describe in remarks) [ ] Inundated { ] Oxidized root channels [ J Stream, Lake, or Tide Gage [ ] Saturated in upper 12 inches [ ] Water -stained leaves [ ] Aerial Photograph [ ] Water marks [ ] Local soil survey data [ J Other (describe in remarks) [ ] Drift lines [ ] FAC-Neutral test [ ] Sediment deposits [ ] Other (explain in remarks) Field Observations: [ ] Drainage patterns in wetlands Depth of Surface Water(in.): 0 Depth to Free Water in Pit(in.): >24 Depth to Saturated Soils(in.): >24 Remarks Soils Depth Hor. Matrix Mottle / 2nd Mottle Texture, in. Color TO -For Abundance ontras Structure, etc_ 0-8 A IOYR 3/2 Sandy Loam stones 8-16 B 10YR 4/3 Sandy Loam stones Hydric Soils Indicators [ ] Histosol [ ] Histic Epipedon [ ] Sulfidic Odor [ ] Probable Aquatic Moist Regime [. ]Reducing Conditions [ ] Gleyed or Low-Chroma Colors Unit Name: Drainage Class: [ ] Concretions [ ] High Organic.% in Surface Layer [ ] Organic Streaking [ ] Listed on Local Hydric Soils List [ ]Listed on National-Hydric Soils List [ ] Other (explain in remarks) Taxonomy: [X] Field Observations match map Remarks appears to drain well -- _ Wetland Determination [ ] Hydrophytic,Vegetation Present [ ] This Data Point is a Wetland [ ] Hydric Soils Present [ ) Wetland Hydrology Present Remarks wetland criteria NOT met appears to drain well Page 2 of 4 Job Number. 02154 Data Form City: Routine Wetland Determination Wetland Data Point: SP 204 Pro]ectlSite: Liberty Lakerldge Date: July 07, 2003 Applicant/Owner: Lakridge Development County: King Investigator: M. Heckert State: WA W Y [X] Do normal circumstances exist on the site? _ _ Community ID: Meadow [ ] Have vegetation, soils, or hydrology been disturbed? Station ID: { ] Is the area a potential problem area? Plot ID: Vegetation Dominant Species Common Name %Cover Indicator t(grbaceaus ' X Agropyron repens Quackgrass 20 FACU X Agrostis Tenuis Sibth. Sentgrass,Colonial 20 FAG X Lotus comiculatus Trefoil, Birds -Foot 60 FAC X Alopecurusgeniculatus Foxtail,Meadow 30 FACW+ that are OBL. FACW. or Remarks Hydrology [ 1 Recorded Data (describe in remarks) [ ] Stream, Lake, or Tide Gage [ ] Aerial Photograph [ ] Other (describe in remarks) Field Observations: Depth of Surface Water(in.): 0 Depth to Free Water in Pit(in.): a24 Depth to Saturated Soils(in.): >24 Remarks Soils Depth Hor. Matrix Mottle /2nd in.) _ Color o or _ 0-12 A 10YR 3/2 12-1 B AB 1 OYR 4/3 1 QYR 5/6 Hydnc Soils Indicators [ ] Histosol [ ] Histic Fpipedon [ ] Sulfidic Odor { ] Probable Aquatic Moist Regime [ ']'iteducing Co[editions [ ] Gleyed or Low-Chroma Colors Unit Name: Drainage Class: Primary Wetland Hydrology indicators [ ]Inundated [ ] Saturated in upper 12 inches [ ] Water marks [ ] Drift lines [ ] Sediment deposits ( ] Drainage patterns in wetlands Texture, FACU+_... _ Secondary Hydrology indicators [ ] Oxidized root channels [ ] Water -stained leaves ( ] Local soil survey data ( ] FAC-Neutral test [ ] Other (explain in remarks) none Sandy Loam stones few faint Sandy loam stones ] Concretions [ ] High Organic % in Surface Layer [ ] Organic Streaking [ . ] Listed on. Local Hydric Soils list [ ] Listed on National Hydric Soils List [ ] Other (explain in remarks) Taxonomy: [X] Field Observations match map Remarks _ sandy gravelly foam Wetland Determination [X] Hydrophytic Vegetation Present [ ] This Data Point is a Wetland [ ] Hydric Soils Present j ] Wetland Hydrology Present Remarks Wetland criteria NOT met appears to drain well [ ..lf►l :,!► ['hl�► ltti [ �:irh *�tn I "I �:[ [:t .?� [ �f" +►r r' ;��i's[ ' I u► �, fi, I I1►�V''`rdi}:{iI�I'' 1.5 ti' IO I t'I 7:{ , t'tA ti Ir;!N , 1? A'�I , �V IiI .i _A► 4[+K I'[ fm I kVED 7 11 \ J s� \ 55 37' i �(I ROPOSEDpi.R* .w N C] A 53,34' t \ \ o� � 2�\ v� 0 -2 8 \ 53' 58' �n TO,�E REMOVE �4 --i,N \ co 2 620 2o' R5- 1 \ R=5 5� 22 21 0 2 0 rn •lam TO BE REMOVED L to � f � 100' n 100) 14 � U 15LWO LA Yy L!l ra 100' LO 2' j ! r T R A w AC�E & 0 19 SP. 2 S� 201 S�, 20� rn\ o P 202 1 -. ® 01-470 Liberty Greve ConfigLInus Prelimina;y Plat King County SEPA Checklist REVISED 09/03/03 Purpose of Checklist: 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 King County and 1 or any other agencies with jurisdiction to identify impacts from a proposal (and to reduce or avoid impacts from the' proposal, if it can be done) and to help King County decide whether an EIS is required. A. BACKGROUND 1. Name of proposed project, if applicable: Liberty Grove Contiguous Subdivision 2. Name of proponent: I03P0005 Lakeridge Development, Inc. IFUI IE � n H�__3W 3. Address and phone number of proponent and contact ���eJ/ Proponent: ITaE�O"EIVE1) Lakeridge Development, Inc. PO BOX. 146 Renton, WA 98067 SEP 0 3 2003 (425) 228-9750 Phone KiNu Luu1ATY Contact Person: Mel Daley or Hans Korve LAND USE SERVICES DMP Engineering 726 Auburn Way North (253) 333-2200 Phone (253) 333-2206 Fax 4. Date checklist prepared: February 28, 2003 REVISED 09/03/03 5. Agency requesting checklist: King County, DDES 6. Proposed timing or schedule (including phasing, if applicable): Application Submittal ............................ March 2003 Public Hearing ........................................ December 2003 Council Action ........................................ February 2004 Engineering Submittal .......................... April 2004 Site Grading ........................................... May 2004 Final Plat ................................................. December 2004 FOR AGENCY USE ONLY LGC 0.-470 Libertv Grove Contiguous Preliminary Rat FOR AGENCY King County SEPA Checklist USE ONLY REVISED 09/03103 7. Do you have any plans for future additions, expansions, or further activity related to or connected with this proposal? If yes please explain. No. 8. List any information you know about that has been prepared, or will be prepared, directly related to this proposal. The following information will be prepared and submitted under separate cover or is available in County files: a Rezone application - DDES a Level 1 Downstream Analysis REVISED July 11, 2003 o Conceptual Drainage Plan o Traffic Study, DN Traffic Consultants, February 7, 2003 o Wetland Report — Habitat Technologies, November 5, 2002 • Preliminary Recreation Plan • Traffic Study, DN Traffic Consultants,_ REVISED July_24, 2003 a Drainage Adiustment Request, July 11, 2003 • School Walking Route Analysis, August 18. 2003 o Addendum Wetiand Rye ,ort. H&S Consulting. July 18 2003 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered'by this proposal? • Applicant has submitted a rezone application with this subdivision application. o Evendell Preliminary Plat approval (LO1TY401) o Liberty Grove Preliminary Plat Approval 10. List any governmental approvals or permits that will be needed for your proposal, if known. SEPA Threshold Determination King County Re -zone Approval King County Preliminary and Final Plat Approval King County Clearing and Grading Permits King County Building Permits King County 11. Give brief, complete description of the proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. SUBDIVISION The proposed preliminary plat will subdivide two parcels, totaling 7.92 acres located on tax parcel(s) 145750 — 0085 and 145750 - 0090 into 36 single-family lots, open space, and access tracts. The property is located on the east side of 160' Ave. SE (145750-0085 & 0090) and contains two existing homes and associated outbuildings. The home located on parcel — 0090 is proposed to remain. The additional home and all the associated outbuildings are proposed for removal. This property is the second half of the original "Liberty Grove" project. All storm water, traffic and recreational issues have been reviewed as. one project but will be presented with each individual segment. 2 LGC 01-4?0 Liberty Grove Contiguous Reliminary fiat King County SI-PA Checklist REVISED 09103/03 The associated re -zone application has been rejected by Staff and the applicant has submitted a TDR proRosal to maintain the ro osed densily. Sewer service REZONE This project and its contiguous neighbor, Liberty Grove have applied for a rezone from R-4 to R-6. This proposed rezone would be consistent with the current comprehensive plan designation. This proposal will also be consistent with the development patterns of the surrounding area. The plat of Evendell located west of the Liberty proposal is currently being rezones from R-4 to R-6 as well. Since the original Application —Staff has withdrawn their support -of the re -zone application. In response, the applicant has submitted documentation to utilize the Counties TDR program to attain the proposed lot density. No additional impacts will result form the use of the TDR ro ram. 12. Location of the proposal. Provide 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 available. The subject proposal is situated on three parcels totaling 7.92 acres, located within the jurisdictional boundaries of unincorporated King County in the SE'/4 of Section 14 Township 23 North, Range 5 East W.M. The site is located on parcel(s) 145750-0085 and -0090. Please refer to the Preliminary Plat map for the legal description, site plan, vicinity map, and topographic map. The proposed Plat of Liberty Grove is located to the north on the west side of lWh Ave. SE. B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one). flat , ollin , hilly, steep slopes, mountainous. The project site is located on the east side of 160th Ave. SE. (-0085 & -0090) and contains a few minor slopes in the northeast corner of the property and a non -jurisdictional drainage channel which extends through the center of the property, from north to south. The northeastern portion of the site is classified as forested uplands. The remainder of the property is pasture with two existing homes and out buildings. One Class 3 wetland has been identified in the south-central portion of the site. The finding and classification has been reviewed and approved by DDES staff. Please refer to the preliminary plat map for detailed contour information. b. What is the steepest slope on the site (approximate percent slope)? According to the field topographic survey, the steepest slope on the site is approximately 5% to 10°% located northeast corner of the project site. FOR AGENCY USE ONLY LGC ii-+70 Liberlv Glove Contiouous Prelim;nar, Plat FOR AGENCY King county SEPA Chi?Ckrst USE ONLY REVISED 09103/03 c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, and muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. According to the US Soil Conservation Service Soil Map, the site is primarily Alderwood series (AgC) d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. According to the King County Sensitive Areas Map, the property contains no hazard areas. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Grading of the site will be necessary to modify the site for stormwater drainage flow. The exact quantity of grading is not known at this time, however, it is anticipated that the grading activities would be designed to balance and not require import or export of soil. Grading of the individual home sites will involve the excavation of approximately 150 to 200 CY of cut and/or fill. These issues will be addressed during the building permit phase. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Some erosion could occur on�site as a result of construction activities; however, temporary erosion and sedimentation control measures to be approved by King County will be employed to reduce erosion impacts. All construction during the wet season will comply with the 1998 Surface Water Design Manual, Sections 5.4.8 and D.4.2.1A concerning site coverage techniques. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Due to the preliminary nature of the plans, the exact percentage of impervious surface associated with this project is currently unknown. The subject proposal will not exceed the maximum impervious surface area as required by KCC 21A.12.030 h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: During construction, the contractor will follow an approved temporary erosion and sedimentation control plan meeting KCC standards. Typical measures, which may be employed, include the use of silt fences, straw bales, and temporary storm drainage features. Hydra seeding exposed soils and cleared areas after construction will also reduce the potential for erosion. All construction during the wet season will comply with the 1998 Surface Water Design Manual, Sections 5.4.8 and D.4.2.1A concerning site coverage techniques. 4 LGC 01-470 1-iberty G,ove Contiguous PretiminaryPlat FOR AGENCY King County SFPA Checklist USE ONLY REVISED 09/03/03 2. Air a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, and industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction: Emissions and dust particulates generated primarily by construction equipment will be produced during the construction phase of this project. The amount of emissions to the air will be minimal and will occur during the actual construction of the development. Long Term Air Quality Long term air impacts would be those typically associated with residential land uses. Sources of long-term emissions and odor could include vehicle emissions from increased vehicle use generated by the new residential units and emissions from wood burning fireplaces (if permitted). The additional vehicular emissions in these areas are not anticipated to concentrate and therefore are not anticipated to create a health hazard to the residents or surrounding areas. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. No. c. Proposed measures to reduce or control emissions or other impacts to air, if any: If particulates become suspended during construction, frequent watering of the site during the construction phase of the project would be used to help control dust and other particulates generated on the site. This will be accomplished in accord with Section 5.4.7 of the 1998 Surface Water Design Manual. 3. Water a. Surface: 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, and wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. According to the King County Sensitive Areas Folio, there are no recorded streams or other water bodies on the subject site. However, field investigation has revealed the presents of a single Class 3 wetland feature in the south-central section of the site. Habitat Technologies has LGC 01-470 Uberty Grove Contiguous Preliminary Plat FOR AGENCY King County SEPA Che--klisf USE ONLY REVISED 09/03103 completed a full wetland assessment and report. The report was reviewed and approved by DDES Staff on November 27, 2002, { 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. Yes. The Class 3 Wetland, identified in the wetland report will be preserved and accorded the appropriate 25' buffers and 15' building setback. Grading and other construction activities are expected within 200' of the wetland feature but outside the required buffers. Appropriate measures will be taken to insure the integrity of the wetland feature during construction. Refer to the attached wetland report for complete details. 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. Creation of the proposed single-family lots will not require the adverse impact or placement of fill within identified wetland areas or buffers. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No 5) Does the proposal lie within a 100-year floodplain? if so, note location on the site plan According to the King County Sensitive Areas Maps, no portion of the site lies within the 100-foot flood plain. 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. No. b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, agricultural; etc.) Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None known at this time. c. Water Runoff (including storm water): 6 LGC 01-470 Liberty Grove Co*guous Preliminary Plat FOR AGENCY King county SEPA Checklist USE ONLY RMSED 09103/03 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 runoff will primarily be generated from roadways, residential structures, and associated driveways. Storm water will be collected in catch basins within the roadways and/or tight -lined from residential roof tops and conveyed to a proposed detention facility located on the project site (southwest corner of-0090). Storm water from the proposed plat of "Liberty Grove" will be transferred along 16e Ave. SE and processed in the single stormwater facility located on parcel -0090. Discharge from the proposed facility will be piped into the existing storm water system. Refer to the attached Level 1 storm water report for complete details. 2) Could waste materials enter ground or surface waters? If so, generally describe. Some pollutants normally associated with residential development could enter the surface water; however, the amount would be minimal since the on -site drainage will be conveyed to a water quality and detention facility in conformance with the 1998 Surface Water Design Manual. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: The storm water runoff will be collected and conveyed to a detention facility(s) that will be designed and constructed in conformance with the 1998 Surface Water Design Manual. 4. Plants Check or circle types of vegetation found on the site: deciduous tree: alder, Maple, aspen, other: evergreen tree: fir, cedar, hemlock, pine, other shrubs grass pasture crop or grain wet soil Plants: cattail, buttercup, bullrush, skunk cabbage water plants: water lily, eelgrass, milfoil, other: b. What kind and amount of vegetation will be removed or altered? The north portion of the project site, on the east side of 160th Ave. SE, is currently covered with evergreen and deciduous trees with the remainder of the property in grasses and pasture land. There is some ornamental vegetation associated with the existing homes. The majority of existing vegetation will be removed during the grading process with the exception of buffer vegetation surrounding the retained wetland feature. All ornamental landscaping associated with the homes to be demolished will also be removed. See the attached wetland report for a complete list of existing vegetation. c. List threatened or endangered species known to be on or near the site. 7 LGC 01-470 Liberty Grove Contiguous Preliminary Plat FOR AGENCY King County SEPA Checklist USE ONLY REVISED 09103103 There are no known threatened or endangered plant species on or near the site. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The proposed preliminary plat anticipates retaining existing trees when possible. The new single-family residences will provide new landscaping including lawns, shrubs, and ornamental trees. Native vegetation will be utilized, where appropriate. Some additional trees and vegetation may be incorporated into the recreation area and storm water facility where appropriate. 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, other: mammals: deer, bear, elk, beaver, other: rodents, raccoons. fish: bass, perch, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. None Known. c. Is the site part of a migration route? If so, explain. No. d. Proposed measures to preserve or enhance wildlife, if any: Retain native vegetation within the sensitive areas tract associated with the retained wetland feature. In addition, installation of native landscaping throughout the plat area will provide coverage and habitat for urban tolerant wildlife. Typical landscaping is likely to include rhododendron, azalea, boxwood, magnolia, cedar, hemlock, blue spruce, cherry, plum, maple and ash. Some additional landscaping will be installed in association with the proposed recreation facility. 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. Electrical energy will be the primary source of power serving the needs of the project and natural gas will be made available for the purpose of heating and other needs associated with residential living. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. 8 LGC 01-470 Liberty Grove Contig«ouS Preliminary Plat FOR AGENCY king County SEPA Checklist USE ONLY MISER 09/03103 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: The residential buildings that will be constructed as a result of this project will meet or exceed the applicable single-family residential energy conservation / consumption requirements in King County and the Uniform Building Codes. 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. It is unlikely under normal working conditions that environmental health hazards would be encountered. All project -related construction will meet or exceed current,. County, State and Federal laws. 1) Describe special emergency services that might be required. In the event that environmental health hazards are encountered or occur during construction, all appropriate precautionary measures will be employed. Any emergency situation would be addressed by the existing resources of Fire District #26. 2) Proposed measures to reduce or control environmental health hazards, if any: State regulations regarding safety and the handling of hazardous materials will be followed during the construction process. Equipment refueling areas would be located in areas where a spill could be quickly contained and where the risk of hazardous materials entering surface water is minimized. On -site management will be equipped with mobile communications equipment at all times to contact emergency services in the event of an incident. b. Noise 1) What types of noise exist in the area, which may affect your project (for example: traffic, equipment operation, other)? The dominant source of noise in the project vicinity is traffic along 1600' Ave. SE, which bisects the proposed project. 2) What types and levels of noise would be created by or associated with the 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. Short-term impacts would result from the use of construction equipment during site development. Construction would occur during permitted construction hours and in compliance with King County noise standards. 9 . LGC 01-470 Liberty Grove contiguous Preliminary Plat FOR AGENCY King CountAy SEPA Checklist USE ONLY REVISED 09103/03 3} Proposed measures to reduce or control noise impacts, if any; Construction activity will be limited to permitted construction hours and construction equipment will not be allowed to idle for continuous periods of time, which will help to mitigate the impacts of potential construction noise. Hours of operation will be posted on -site. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The site(s) are currently used as single family residences. One of the existing properties contains a barn and other outbuildings associated with the keeping of live stalk. Adjacent land uses consist of a low density single- family residence. The existing plat of Liberty Lane is located to the east and the proposed plat of Evendell is located to the west. b. Has the site been used for agriculture? If so, describe. It is not believed that the site was utilized for agricultural production in the past. c. Describe any structures on the site. The property on the east side of 160th Ave. SE , "Liberty Grove Contiguous" (145760-0085 & -0090) contains two existing homes and associated outbuildings, The home located on parcel — 0090 is proposed to remain. The additional home on lot -0085 and all the associated outbuildings are proposed for removal. 0 1,240 SF home located at13612 160TH AV SE 98055 (145750-0085) 0 2,410 SF home located at 13644 160TH AV SE 98056 (145760-0090) d. Will any structures be demolished? If so, what? Yes. One of the homes and all of the out buildings are proposed for removal. e. What is the current zoning classification of the site? The project site is currently zoned R-0. The applicant has submitted a proposal to rezone the property as R-6 or utilize the Counties TDR Droalram to achieve the desired lot count. f. What is the current comprehensive plan designation of the site? According to the King County Comprehensive Land Use Plan, the area is designated Urban Residential — R 4-12. This designation would support the proposed rezone of the property. g. If applicable, what is the current shoreline master program designation of the site? 10 LGC 09-470 Liberty Grove Contiguous PreliMEnaty Plat FOR AGENCY King County SEPA Checklist USE ONLY REVISED 09/03103 Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. According to the 1990 King County Sensitive Areas Folio no part of the property has been designated as sensitive. However, field investigation has identified a low value, minor Class 3 wetland feature on -site. The feature is located in the south-central segment of the project site. See attached Wetland Report. An addendum wetland study has been provided in response to Staff comments. i. Approximately how many people would reside or work in the completed project? Assuming 2.5 persons per household, approximately 90 people would reside in the proposed project. Approximately how many people would the completed project displace? 2.6 k. Proposed measures to avoid or reduce displacement impacts, if any: The proposed project will provide 35 new housing units, 36 total. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The project will be developed in accordance with applicable King County development and land use codes to ensure the project is consistent with the goals and policies of the Comprehensive Plan and applicable development regulations in effect at the time of a complete Preliminary Subdivision application. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. Approximately 35 (36 total) new middle -income housing units will be provided. b. Approximately how many units, if any would be eliminated? Indicate whether high, middle, or low-income housing. Two middle income homes will be removed. c. Proposed measures to reduce or control housing impacts, if any: Adherence to the comprehensive plan and growth management planning goals of King County would ensure that housing development is consistent with those policies stated in the applicable land use plan. 35 new homes will be built. 11 LGC 01-470 Liberty Grove Contiguous Preliminary Plat FOR AGENCY King County SCPA Checklist USE ONLY REVISED 09103103 10. Aesthetics a. What is the tallest height of any proposed structures), not including antennas; what is the principal exterior building material(s) proposed? No specific building plans are included with this project; however, it is anticipated that houses built on the site would conform to the King County development regulations and be limited to a height of 35 feet in accordance with 21 A.12.030. b. What views in the immediate vicinity would be altered or obstructed? Development of the site would result in a change to the visual character of the site for the nearest existing residences and roadways to that of a single- family neighborhood area. No significant views would be obstructed. c. Proposed measures to reduce or control aesthetic impacts, if any: The site plan has been developed to provide a site design layout consistent with the development regulations in place for the R-A and/or R-6 zone. The proposed project incorporates landscape and open space areas in accordance with King County development regulations. 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? Light and glare from the completed project is anticipated to be that typically generated by single-family residences, mainly occurring during the evening hours, and be associated with vehicle headlights, streetlights and residential unit lighting. b. Could light or glare from the Finished project be a safety hazard or interfere with views? Not under normal circumstances. c. What existing off -site sources of light or glare may affect your proposal? None. d. Proposed measures to reduce or control light and glare impacts, if any: Installation of front yard trees along,the street frontages and landscaping inl open space areas will help to alleviate some of the light and glare created by streetlights, headlights and residential unit lighting from the adjacent properties. The proposal will only install those street lights approved by King County and Puget Sound Energy. Typical streetlights would consist of a 150 watt, flat lens luminaire located atop a 25' light standard. 12 LGC 41-470 Liberty Grove Contiguous Preliminary Plat FOR AGENCY K"ng County SEPA Checklist USE ONLY REVISED 09/03/03 12. recreation a. What designated and informal recreational opportunities are in the immediate vicinity? There are currently no public recreation facilities in the immediate vicinity of the site. Undeveloped King County park land lies approximately 2000' west of the site. Maplewood Park is about 1 mile southwest of the site. Maplewood Heights park is .4 miles southeast of the site. b. Would the proposed project displace any existing recreational uses? If so, describe. The project would not displace any existing recreational 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 proposed project will provide a minimum of 390 square feet of open space/recreation area per single-family lot (13,650 SF) pursuant to 21A.14. The applicant proposes to construct recreational facilities on site or pay the appropriate fee -in -lieu of recreational facilities to offset any potential adverse impacts of the project. Many of the required recreational facilities required for the plat of Liberty Grove are proposed to be located in conjunction with the facilities provided by the plat of Liberty Grove Contiguous. This will allow for a more unified and centralized recreational opportunity. 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 known. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. To the best of our knowledge, there are no landmarks or evidence of any significant historic, archaeological, scientific or cultural resources known to be on or next to the site. c. Proposed measures to reduce or control impacts, if any: If any such historic or cultural evidence is encountered during construction or installation of improvements, work would be halted in the area and a state -approved archaeologist/historian would be engaged to investigate, evaluate and/or move or curate such resources, as appropriate. 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. 13 LGC 01-470 Liberty Grove Contiguous Preliminary Plat FOR AGENCY King County SEPA Checklist $ USE ONLY REVISED 09103/03 The proposed project will take primary access from 160"' Ave SE. Secondary access for the east portion of the plat will come from SE 136' Street. Please see the attached traffic report for more details. b. Is site currently served by public transit? 1f not, what is the approximate distance to the nearest transit stop? No. The nearest transit stop is located near the corner of SE 128"' Street and 1601h Ave SE, approximately .46 miles away from the project site. The Metro bus rout providing service to that stop is #111. There is no bus shelter provided at that location. c. How many parking spaces would the completed project have? How many would the project eliminate? None. The proposed project will provide parking in private driveways, garages and on -street parking. 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). Yes, the proposed project will require improvement of public right-of-way along 160"' Ave. SE & SE 136"' Street and construction of internal circulation roads and access tracts. All roads will be designed and constructed to current King County standards. 160"' Ave. SE will be designed to the Urban Collector standard. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? if known, indicate when peak volumes would occur. Assuming 10 trips per household per day, the completed project will generate approximately 360 vehicular trips per day. Please refer to the attached Traffic Report for specific details. g. Proposed measures to reduce or control transportation impacts, if any: The applicant or subsequent owner(s) will comply with Title 14 of the King County Code, which contains provisions for payment of MPS (Mitigation Payment System) Fees. Applicant will either pay the MPS fee at the time of final plat application or at the time of building permit application. If the first option is chosen, the fee paid will be the fee in effect at the time of plat application, and a note will be placed on the face of the plat stating, "All Mitigation Payment System Fees required by Title 14 have been paid." If the second option is chosen, the MPS fee paid will be the fee in effect at the time of building permit application. Contributions to projects listed in the MPS program may receive credit towards the MPS payment due. The estimated MPS fee for this project at the time of application will be, based on 14 LGC 01-470 Liberty Grove Contiguous Preliminary Plat King County SEPA ChecKlist REVISED 09/03103 a 35 NEW (36 total) unit subdivision. The project lies within MPS zone # 452, which has a fee of $2,139 per new single-family unit. Based on 35 new units, the projected total MPS fee is $74,865. 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 completed project would result in an increased need for police and fire protection as well as emergency medical service. Additional recreational and school facilities will also be required to address the increase in demand for recreational opportunities. Extension of public sewer and water service will also be required. b. Proposed measures to reduce or control direct impacts on public services, if any. The project will be designed and constructed with adequate water pressure, properly located fire hydrants and roadways constructed to allow adequate access for fire, medic and police protection vehicles. Increased property valuation will result in increased taxes generated to support public services. The proponent will pay necessary school and traffic mitigation fees to offset the potential impacts to the school and transportation system. The project is located in the Issaquah School District #411. The current school impact fee is $3,924 per single-family unit. Assuming 35 new units (36 total), the total school impact fee would be $137,340. Recreational facilities will be constructed on site in accordance with the requirements of 21A.14 to offset the potential impacts on the existing recreational system or a fee -in -lieu of those facilities will be offered. 16. Utilities a. 'Indicate utilities currently available at the site: Electricity, Natural Gas, Water, Telephone, Sanitary Sewer, Septic System, Refuse Service, Other. 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. FOR AGENCY USE ONLY 15 LGC 0 01-470 Liberty Grove Contiguous Preliminary Plat King County SEPA Checklist ` REVISED 09/03/03 Water_System — Sanitary Sewer System — Storm Water — Electricity: Natural Gas: Telephone: Refuse Service: Cable TV: Water District #90 City of Renton — Extension of a10" to 12" sewer main in SE 136d' St., 10" sewer main in 162"d St SE., and a 8" sewer main in 158"' & 16e Ave_. SE, King County Puget Sound Energy Puget Sound Energy Qwest Robanco AT&T Broadband All underground service will be constructed in conjunction with road and storm drainage construction activities C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Hans A. Korve DMP., INC Planning Manager Date Prepared: February 28, 2003 REVISED September 3, 2003 FOR AGENCY USE ONLY 16 LGC 0 King County Department of Developmenk and Environmental Services Land Use Services DivisF52 Alternative formats available 900 Oakesdaie Avenue S�%�Renton, Washington 980 �'J upon request (206) 296-66M TTY (2 SEP 0 3 2003 ILO3P0005 _UO3PO005 -_ L03TV4011 File Number KING WWI i y LAND USE SERVi - no PF�V7 (To be filled in by DDES) PRELIMINARY SUBDIV191ON R HEET ELATING TO DENSITY AND DIMENSIONS Several development regulations play a role in the creation of a subdivision within King County. Determining the allowable density, minimum density, and a lot width on a piece of property can be confusing. This worksheet will assist you in correctly applying specific portions of the code and will be used to determine if a proposed subdivision or short subdivision meets the density and dimensions provisions of the King County Zoning Code (Title 21A). This worksheet is designed to assist applicants and does not replace compliance with adopted local, state and federal laws. Pre -application conferences are required prior to submittal of a subdivision or short subdivision. These conferences help to clarify issues and answer questions. They may save you both time and money by eliminating delays resulting from requests for additional Information and revisions.- You may call (206) 296-6600 to find out how to arrange for a pre -application conference. Worlsheeit Prepared By., Hans KorveDate:___28103 (Print Name) Subdivision Name: Litgfy Grove Contiguous Preliminary Plat (R-4 Option MDR) Comprehensive Plan Land Use Designation: UdVn Re5iQentlal- -1 Zoninq� R-4 * * R-4 Option wj TDR If more than one Comprehensive Plan Land Use designation or zone classification exists for the property, show the boundary between the land uses or zones and the area within each on the preliminary plat map. If a single lot is divided by a zone boundary, transferring density across zones on that lot may be permitted subject to the provisions of K.C.C. 21A.12.200. 1, ■ A ■ ■ I6 ".C.r Site area (in square feet) is the gross horizontal area of the project site, I= submerged lands as defined by K.C.C. 21A,06.1265, and lqg areas which are required to be dedicated on the perimeter of a project site for the public rights -of -way. 0 square feet in submerged land (any land below the ordinary high water mark — see K.C.C. 21A.06.825) + 0 square feet in perimeter rights -of -way which will be required to be dedicated (area 30 feet from center line of road) r 0 Total * All existing Density Calculations Liberty -Grove Contiguous RA Option w/ 7DR Page 1 of 6 Calculation: _ 344,995 Gross horizontal area of the project site — 0 Total submerged lands and rights -of -way . 344,995 Site area in square feet NOTE: To continue Calculations, convert site area in square feet to acres by dividing by 43,560 7,92 — Site area In acres NOTE: When calculating the site area for parcels in the RA Zone, If the site area should result in a fraction of an acre, the following shall apply: Fractions of .50 or above shall be rounded up to the next whole number and fractions below .50 shall be rounded down. Example: If the site area in acres is 19.5 acres (less the submerged land and less the area that is required to be dedicated on the perimeter of a project site for public right-of-way) the site area can be rounded up to 20 acres. No further rounding is allowed. (See K.C.C. 21A.12.080) The base density Is determined by the zone designations(s) for the lot. R - 4 du/acre * Not including TDR The base number of dwelling units is calculated by multiplying the site area by the base density in dwelling units per acre (from K.C.C. 21A.12.030 .040 tables). Z.92 site area in acres (see Section 1.) X 4 base density (see Section II) 32 ... _ allowable dwelling units Except as noted below, when calculations result in a fraction, the fraction is rounded to the nearest whole number as follows: A. Fractions of .50 or above shall be rounded up; and B. Fractions below .50 shall be rounded down. NOTE. For parcels in the RA Zone, no rounding is allowed when calculating the allowable number of dwelling units. For example, if the calculation of the number of dwelling units equaled 2.75, the result would be 2 dwelling units. Rounding up to 3 is not allowed. (See K.C.C. 21A.12.070(E)). Id. &@nstM"w-s1%g RCgeatiom_S-Ha�(K.C.C...ZIA.g4,1801 This section must be completed only if the proposal is a residential development if more than four dwelling units in the UR and R zones, stand-alone townhouses in the NB zone on Density and Dimension calculations liberty Grove RA option w/ TDR Page 2 of 6 property designated Commercial Outside of Center if more than four units, or any mixed use development If more than four units. Recreation space must be computed by multiplying the recreation space requirement per unit type by the proposed number of such dwelling units (K.C.C. 21A.14.180). Note: King County has the discretion to accept a fee in lieu of all or a portion of the required recreation space per K.C.C. 21A.14.185. Apartments and town houses developed at a density greater than eight units per acre, and mixed use must provide recreational space as follows: 90 square feet X proposed number of studio and one bedroom units NA 170 square feet X proposed number of two bedroom units + 170 square feet X proposed number of three or more bedroom units . + Recreation space requirement — Residential subdivisions, townhouses and apartments developed at a density of eight units or less per acre must provide recreational space as follows: 390 square feet X 32 proposed number of units 390 square feet X 36 proposed number of units, including MR Mobile home parks shall provide recreational space as follows: 260 square feet X proposed number of units 12,480 14,40 - NA This section is used for computing minimum density and must be completed only if the site is located in the R-4 through R-48 zones and designated Urban by the King County Comprehensive Plan. The net buildable area is the site area (see Section I) less the following areas: 0 areas within a project site which are required to be dedicated for public rights -of -way in excess of sixty (60') of width + 0 sensitive areas and their buffers, to the extent they are required by King County to remain undeveloped + 0 areas required for above ground stormwater control facilities including, but not limited to, retention/detention ponds, biofiltration swages and setbacks from such ponds and swales + _12,480 areas required by King County to be dedicated or reserved as on -site recreation areas. Deduct area within stormwater control facility if requesting recreation space credit as allowed by K.C.C. 21A.14.180 (see Section IV) + regional utility corridors, and + other areas, excluding setbacks, required by King County to remain undeveloped = 12,480 Total reductions Calculation: 344,995 site area In square feet (see Sectionl) 12,480 Total reductions — 3321515 _ _ Net buildable area in square feet NOTE: convert site area is square feet to acres by dividing by 43,560 w 7.6 Net buildable area in acres 7.6 Net buildable area in acres including TDR Density and Dimension Calculations Liberty Grove RA Option w/ TDR Page 3 of 6 1l1. Minimum 4ftLI BAi41nitiaii ®enaity L.C.C. U&J&.960, The minimum density requirement applies 4-rlj.]C to the R-4 through R-48 zones. Minimum density i5 determined by multiplying the base density in dwelling units per acre (see Section II) by the net buildable area of the site In acres (see Section V) and then multiplying the resulting product by the minimum density percentage from the K.C.C. 21A.12.030 table. The minimum density requirements may be phased or waived by King County in certain cases. (See K.C.C. 21A.12.060.) Also, the minimum density requirement does not apply to properties zoned R-4 located within the rural town of Fall City. (See K.C.C. 21A.12.030(B)12.) Calculation: • NA base density in du/ac (see Section II) X Net buildable area In acres (see Section V) .. X minimum density % set forth in K.C.C. 21A.12.030 or as adjusted in Section VII . _ minimum dwelling units required V 11. Mi i r to . 7 Residential developments in the R-4, R-6 and R-8 zones may modify the minimum density factor In K.C.C. 21A.12.030 based on the weighted average slope of the net buildable area of the site (see Section V). To determine the weighted -average slope, a topographic survey is required to calculate the net buildable area(s) within each of the following slope Increments and then multiplying the number of square feet in each slope increment by the median slope value of each slope increment as follows: NA sq. fit 0-5% slope increment X 2.5% median slope value = NA + sq. ft 5-10% slope increment X 7.5% median slope value = + _ + sq. ft 10-15% slope Increment X 12.5% median slope value = + + sq. ft 15-20% slope increment X 17.5% median slope value = + + sq. ft 20-25% slope Increment X 22.5% median slope value = + + sq. ft 25-30% slope increment X 27.5% median slope value = + + sq. ft 30-35% slope increment X 32.5% median slope value = + + sq. ft 35-40% slope increment X 37.5% median slope value = + Total square feet Total square feet in net buildable area adjusted for slope Calculation: NA total square feet adjusted for slope divided by total square feet in net buildable area weighted average slope of net buildable area % (Note: multiply by 100 to convert to percent — round up to nearest whole percent) Use the table below to determine the minimum density factor. This density is substituted for the minimum density factor in K.C.C. 21A.12.030 table when calculating the minimum density as shown in Section VI of this worksheet. Weighted Average Slope of Net Minimum Density Factor Buildable Areas of Site: 0% -- less than 5% 85% 5% -- less than 15% 83%, less 1.5% each 1% of average slope In excess of 5% 15% -- less than 40% 66%, less 2.0% for each 1% of average slope in excess of 15% Density and Dimension calculations Uberty Grove R-4 Option w/ TDR Page 4 of 6 EXAMPLE CALCULATION FOR MINIMUM DENSITY ADJUSTMENTS FOR MODERATE SLOPES: sq. ft 0-5% slope increment X 2.5% median slope value = + 10,000 sq. It 5-10% slope Increment X 7.5% median slope value = + 20,000_ sq. It 10-15% slope increment X 12.5% median slope value = + sq. ft 15-20% slope increment X 17.5% median slope value = + sq. ft 20-25% slope increment X 22.5% median slope value = + sq. ft 25-30% slope Increment X 27.5% median slope value = + sq. ft 30-35% slope increment X 32.5% median slope value = + sq, ft. 35.40% slope increment•X 37.5 % median slope value = 30,000 _ Total square feet in net buildable area 750 + 2,500 + + + + 3,250 Total square feet adjusted for slope 3,250_ _ Total square feet adjusted for slope divided by . 30,000 Total square feet in net buildable area .108333 Weighted average slope of net buildable area = 11% (Note: multiply by 100 to convert to percent — round up to nearest whole percent) Using the table above, an 11% weighted average slope of net buildable area falls within the 5% -- less than 15% range which has a minimum density factor of 83%, less 1.5% for each 1% of average slope in excess of 5%. Since 11% is 6% above 5%, multiply 6 times 1.5 which would equal 9%. Subtract 9% from 83% for'an adjusted minimum density factor of 74%. This replaces the minimum density factor in K.C.G. 21A.12.030 table. V111. Maximum Dwellinga I . 0 : This section should be completed only if the proposal includes application of residential density incentives (K.C.C. 21A.34) or transfer of density rights (K.C.C. 21A.37). Maximum density is calculated by adding the bonus or transfer units authorized to the base units calculated in Section III of this worksheet. The maximum density permitted through residential density incentives is 150 percent of the base density (see Section II) of the underlying zoning of the development or 200 percent of the base density for proposals with 100 percent affordable units. The maximum density permitted through transfer of density rights Is 150 percent of the base density (see Section II) of the underlying zoning of the development. NA base density in dwelling units per acre see (Section II) X 150% = maximum density maximum density in dwelling units per acre X site area In acres = maximum dwelling units allowed utilizing density incentives (K.C.C. 21A.34) NA base density in dwelling units per acre (see Section II) X 200% = maximum density maximum density in dwelling units per acre X site area in acres Y maximum dwelling units allowed utilizing density incentives with 100 percent affordable units (K.C.C. 21A.34) 4 base density in dwelling units per acre (see Section II) X 150% = 6 6 maximum density in dwelling units per acre X 7.92 site area in acres = maximum dwelling units allowed utilizing density transfers (K.C.C. 21A.37) Calculation: 32 base allowable dwelling units calculated in Section III + bonus units authorized by K.C.C. 21A.34 + 4 transfer units authorized by K.C.C. 21A.37 36 total dwelling units (cannot exceed maximum calculated above) Ix. Hln[mUm Lot,Area For A - Except as provided for nonconformances in K.C.C. 21A.32: maximum density 48 Density and Dimension Calculations liberty Grove R-4 Option w/ TDR Page 5 of 6 A. In the UR and R zones, no construction shall be permitted on a lot that contains an area of less than 2,500 square feet or that does not comply with the applicable minimum lot width, except for townhouse developments, zero - lot -line subdivisions, or lots created prior to February 2, 1995, in a recorded subdivision or short subdivision which complied with applicable laws, and; B. In the A, F, or RA Zones: 1. Construction shall not be permitted on a lot containing less than 5,000 square feet; and 2. Construction shall be limited to one dwelling unit and residential accessory uses for lots containing greater than 5,000 square feet, but less than 12,500 square feet. (K.C.C. 21A.12.100) It.' WtAdth (CL.C.C. 21A.12.050-(.M Loft widths shall be measured by scaling a circle of the applicable diameter within the boundaries of the lot as shown below, provided than an access easement shall not be Included within the circle. (See K.C.C. 21A.12.050). Lot Width Circle 0 Lot Width Measurement Density and Dimension Calculations Liberty Grove R-4 4ptlon w/ TDR Page 6 of 6 E7 TRAFFIC IMPACT ANALYSIS for • PRELIMINARY PLAN` OF LIBERTY GROVE ADDENDUM #I - RESPONSE TO PLAT SCREENING ISSUES 0 1• I& July 24, 2003 Prepared By: Gary A. Norris, P.E. DN Traffic Consultants PO Box 547 Preston, Washington 98050-0547 RECEIVES SEP 0 3 2003 Kmu i,UUN'ry f LAND USE SERVICES D `7�Oul L03P0008 L03P0005 FIRIEV9 Client: 0 Wayne Jones Lakeridge Development Company P4 Box 146 Renton, Washington 98057 I® Tra 1c Im pgct Ana1 sis Addendum #1 Libe Grove The following report was prepared as an addendum to the Traffic Impact Analysis for the Preliminary Plat of Liberty Grove dated February 7, 2003. The purpose of the addendum is to provide a response to the traffic related issues identified in the Plat Screening Transmittal. The Plat Screening Transmittal letter identified 6 items for further evaluation which include: Sa. An AM peak hour analysis of the intersections analyzed in the T1A submitted with the plat application. 5b. An alternatives analysis that addresses the Hearing Examiner's decision for the plat of Evendeli, specifically, the denial of the rezone request (and, reduction of the permitted number of lots to 46), together with elimination of the requirement of off -site construction of the SE 136t' Street (156t' Avenue to 15Wh Avenue SE) connection. 5c. Updated existing conditions (2003) levels -of -service (Page 7, Table 1). Please retain the 2001 information (unless "2001" is merely a typographical error) to address previous testimony related to the reductions in regional trip activity resulting from local market conditions. 5d. The 26% distribution south along 160d' Avenue SE may be excessive under a "with SE 136t' Street" scenario. The travel path to the intersection of 142d Place SEISE 156t' is nearly 33% further along that travel path as compared to that using an extended SE 136t' Street. 5e. Perform a travel time analysis to compare an actual morning peak hour travel time along the 160d' Avenue to SE We Street to SE 156t' Street trip versus a theoretical SE 136t' Street to 156`' Avenue SE, with appropriate delays factored into the westbound left turn to proceed southbound on 156'' Avenue SE. The newly constructed west leg of SE 136t' Avenue SE may serve as a reasonably accurate source of data on the delays required to complete a left turn across 156 h Avenue SE. Other single lane approach "STOP" controlled intersections along i the portion of 156`b Avenue SE, between SE 128"' and SE 142od Place. 5f. Updated traffic accident history (that is, include 2002). The process, findings and conclusions of the additional traffic analysis are discussed below. Each issue is identified in italics with the response stated below. Sa. An AMpeak hour analysis of the intersections analyzed in the TIA submitted with the plat application. An AM peak hour analysis of the following intersections was conducted: 10 DN Traffic Consultants Page 1 a� Tra is Impact Analysis Addendum #1 Liberty Grove P, a SE 136 h Street/] 60`h Avenue SE o SE 128"' Street/160"' Avenue SE c SE 12W' Street/156`" Avenue SE o North Site Access/160'' Avenue SE C South Site Access/160th Avenue SE The analysis includes a level of service evaluation at the intersections for the 2003 existing, 2005 background and 2005 with project conditions. Existing AM peak hour traffic volumes were obtained from AM peak hour turning movement counts collected by this consultant during the month of July 2003. The 2005 background volumes were obtained by factoring the existing volumes by 1.0 percent per year for consistency with the original traffic analysis and adding pipeline traffic volumes. AM peak hour pipeline traffic volumes were obtained by factoring the PM peak hour pipeline volumes documented in the February 7, 2003 report, by 0.73, the ratio of AM peak trip generation to PM peak trip generation for single family developments. The intersection turning movements were then adjusted to reflect a reverse orientation as would be expected between AM and PM peak hour trip making for single family developments. This approach is acceptable as all pipeline developments in this area are single family. It also reflects a "worst case" scenario, in terms of impact to the SE 128`h Street/160 Avenue SE intersection., as the PM peak distribution to the north (74 percent) is higher than that reflected in the AM peak hour turning movement counts (63 percent). The 2005 with project AM peak hour turning movement volumes were obtained by adding project generated trips to the 2005 background volumes. Traffic distribution for the AM peak trips was assumed to be the same as the PM peak hour. Therefore, project generated AM peak trips were assigned in the same manner as the AM pipeline trips, again representing a "worst case" scenario. A summary of the AM peak hour turning movement volumes at the analysis intersections for the alternative analysis scenarios is presented in the Appendix. Level of service (LOS) for the AM conditions was calculated using Synchro 5.0. The results of the LOS analysis are presented in Table 1. DN Traffic Consultants Page 2 ® Trafc Impact Analysis Addendum #1 Liberty Grove • Table 1. AM Peak Hour Level of Service Intersection Traffic Control 2003 Existing 2005 Without Project 2005 With Project LOS Standard N Site Acc/160'h Ave SE Eastbound' One -Way Stop n/a n/a A(8.8) E S Site Acc/160'h Ave SE Westbound' One -Way Stop n/a n/a A(8.8) E SE 128`h St/ 160'h Ave SE Northbound' Two -Way Stop C(22.1) C(23.9) D(27.7) E SE 136a' St/ 160'h Ave SE Westbound' One -Way Stop A(8.6) E Eastbound' Two -Way StopZ A(8.9) A(9.0) SE 128h St/ I5e Ave SE Overall Signal B(14.2) B(18.8) B(19.0) E (xx) — seconds of delay per vehicle. 1 -- Level of service for the movement with the highest delay is shown. 2 -- SE 136'h Street will no longer be constructed as part of the Evendell proposal based on the Hearing Examiners decision. However, it is anticipated that this connection will be made at some point in the future and therefore was considered as part of the AM analysis. As shown in Table 1, all of the analysis intersections are estimated to operate at an acceptable level of service for all analysis conditions. Comparing the results of the AM peak hour analysis to the PM peak hour level of service at the same intersections indicates the PM peak hour represents the "worst case" analysis. The PM peak hour vehicular delay at each of the analysis intersections is higher than the AM peak hour vehicular delay at the same intersection. (See February 7 2003, TIA, Table 6, page 12). 5b. An alternatives analysis that addresses the Hearing Examiner's decision for the plat of Evendell, specifically, the denial of the rezone request (and, reduction of the permitted number of lots to 46), together with elimination of the requirement of off -site construction of the SE 136rh Street (15e Avenue to 158rh Avenue SE) connection. Traffic volumes for the requested alternatives analysis were assumed to be the same PM peak hour traffic volumes used in the initial traffic impact analysis with the following adjustments: 1) Reduction in the number of PM peak hour trips generated by Evendell from 76 to 46 to reflect the reduction in the number of lots associated with Evendell from 75 to 46. 2) Reassignment of existing, pipeline, and project trips to reflect the elimination of the SE 1304 Street connection between 156t' Avenue SE and 160a' Avenue SE. The reassignment was accomplished by reassigning all trips through the SE 128t' Street/160'h Avenue SE intersection as opposed to the SE 136't` Street/156`h Avenue SE intersection as currently presented in the initial TIA. None of the trips were reassigned to 160"' Avenue SE south of SE 136 h Street as the proposed connection was not anticipated to impact traffic assignment on 160"' Avenue SE south of the 136a' Street intersection DN Traffic Consultants Page 3 Traffic Impact Analysis Addendum 41 _ _. Liberty Grove The resulting PM peak hour volumes associated with the trip generation and traffic assignment adjustments discussed above are presented in the Appendix. Level of service (LOS) for the alternatives analysis was calculated using Synchro 5.0. The results of the LOS analysis are presented in Table 2. Tnhlp 2_ PM Peak Hour Level of Service With 46 Lot Evendell and No SE 136"' Street Intersection Traffic Control 2003 Existing 2005 2005 W/out Project With Project zoos w/SE 136`62 N Site Acc/ 160'h Ave SE Eastbound One -Way Stop n/a n/a A(9.6) A(9.5) S Site Acc/160' Ave SE Westbound One -Way Stop n/a n/a A(8.8) A(8.8) SE 128`' St/ 160a' Ave SE Southbound' Two -Way Stop D(27.4) E(37.1) Northbound' Two -Way Stop E(36.5) E(47.9) C(24.2) SE 136'h St/160`h Ave SE Westbound' One -Way Stop A(8.7) A(8.8) A(8.8) $astbound' Two -Way Stop A(9.9) SE 12e St/ I5e Ave SE Signal Overall C(25.0) C(28.3) C(28.7) C(32.0) (xx) — seconds of delay per vehicle. 1 — Level of service for the movement with the highest delay is shown. 2 — Assumes construction of SE 136a' Street from 160`� Avenue SE to 156`� Avenue SE and development of the 75 lot Evendell proposal as presented in the February 7, 2003 traffic impact analysis. As shown in Table 2, all intersections operate at or above the acceptable level of service (LOS E). Comparing the results to the with SE 136`h Street/75 lot Evendell scenario, the LOS is virtually unchanged at the site access and SE 136h Street intersections with 160'h Avenue SE; the average vehicle delay at the SE 128"b Street/160"' Avenue SE intersection increases by 10 seconds and the movement with the highest delay shifts from the southbound direction to the northbound direction, (the LOS in the northbound direction goes from C to E with an increase of 23 seconds in average delay); and the average vehicular delay at the SE 128 h Street/156t' Avenue SE intersection actually decreases by 3 seconds. ® Sc. Updated existing conditions (2003) levels -of -service (Page 7, Table 1). Please retain the 2001 information (unless "2001 " is merely a typographical error) to address previous testimony related to the reductions in regional trip activity resulting from local market conditions. Please note the levels of service presented in Table 1, Page 7 is actually a 2003 existing • condition LOS not 2001. It is as suggested "merely a typographical error". Table 1 is restated below in the corrected form 1• DN Traffic Consultants Is Page 4 Traffic Impact Analysis Addendum #1 LibertGrove • Table ](From 2-7-03 TIA). 2003 PM Peak Hour Level of Service Intersection Traffic Control 2003 Existing LOS Standard SE 128" St/ I60'h Ave SE Southbound' Two -Way Stop D(27.4) E SE 136" St/160" Ave SE Westbound One -Way Stop A(8.7) E SE 128' St/15e Ave SE Overall Signal C(25.0) E (xx) — seconds of delay per vehicle. 1 — Level of service for the movement with the highest delay is shown. 5d. The 26% distribution south along 160'h Avenue SE may be excessive under a with SE 136`6 Street" scenario. The travel path to the intersection of 142"d Place SE/SE 15e is nearly 33% further along that travel path as compared to that using an extended SE 13e Street. There are several factors that lead to a particular traffic distribution including trip orientation, travel time, stops along the way, and desirability of route. The 26 percent 40 distribution was based on existing traffic assignment along the 160"' Avenue SE corridor as determined from 2003 PM peak hour turning movement counts. This issues are explored in greater depth in item 5e. 5e. Perform a travel time analysis to compare an actual morning peak hour travel time along the Me Avenue to SE 1441h Street to SE 156rh Street trip versus a ® theoretical SE 136`h Street to 156rh Avenue SE, with appropriate delays factored into the westbound left turn to proceed southbound on 15e Avenue SE. The newly constructed west leg of SE 136 h Avenue SE may serve as a reasonably accurate source of data on the delays required to complete a left turn across 156`h Avenue SE. Other single lane approach "STOP" controlled intersections along • the portion of 15e Avenue SE, between SE 128th and SE 142"d Place. Although the statement requested a `morning peak hour travel time" analysis, it was assumed the motivation for the request came from the comment 5d which indicated the 26 percent distribution south along 160'h Avenue SE might be excessive under the `with SE 136"' Street" scenario. Since the 26 percent distribution was applied to the PM peak hour analysis, a PM peak hour travel time analysis was conducted. The travel time analysis was conducted in the study area to evaluate the propensity to use the alternative routes, i.e. 160a' Ave SEISE 140 St/156" Ave SE to the 156'h Ave SE/142°d Pl intersection versus the SE 136" St/l5e Ave SE route. The travel time analysis was conducted on Wednesday afternoon July 23, 2003 between 4:30 PM and 5:30 PM. The study involved three runs in each direction on each route. Travel time recorded on the 1606' Avenue SE route was consistent in each direction at an average of 2.03 minutes. For the 156a' Avenue SE route, there was a 10 second difference in the ® average travel time between the north bound and south bound runs. The northbound run averaged 46 seconds whereas the south bound run averaged 56 seconds. This was a result of the additional delay created by the southbound platoon coming from the signal DN Traffic Consultants Page 5 [: Trafc Impact Analysis Addendum #1_ _ _ _ _ _ _ Liberty Grove on 156 h Avenue SE at SE 128"' Street. The additional delay occurred at the stop sign at the 142od Place intersection. In addition to the travel time runs, an analysis of the vehicular delay associated with vehicles waiting to enter the southbound flow. To estimate the delay, three left turn maneuvers were made from the side streets along 1561' Avenue SE to 156d' Avenue. Because of the extensive platoon of vehicles coming from the signal at 160fl' Avenue SE, the average vehicular delay was 26.7 seconds with the measured delay for each attempt ranging from 7 seconds to 38 seconds. A two vehicle queue was also observed on one of the dead end side streets. The travel time across a constructed SE 136`h Street was estimated using the distance and assumed travel speed consistent with a posted speed limit of 25 mph. The results of this calculation yielded a travel time of 35.9 seconds. Adding the various travel time elements associated with traffic from the 16& Avenue SE corridor using SE 136'' Street and 156t' Avenue for trips bound to the south yielded a travel time of 1.88 minutes (51 seconds + 26.7 seconds + 359 seconds = 1.88 minutes) for the SE 1360' Street/ 15e Avenue SE route compared to 2.03 minutes for the 160'h Ave SE/144fl` Ave SE/15e Ave SE route. The results of the travel time analysis indicates a slight travel time advantage (approximately 7 percent) for the SE 136t' Street/156'h Avenue SE route. However, with the proposed change in functional classification and increased volumes for the 156t' Avenue SE corridor the travel time difference could swing in favor of the 160'' Avenue SE route. Another factor in the trip assignment issue is the orientation of the traffic. To estimate this factor, a 10 minute turning movement count was conducted at the 16e Avenue SE/SE 144 h Street intersection during the same peak hour as the travel time analysis. The purpose of the count was to determine the orientation of 16& Avenue SE traffic at the SE 144t' Street intersection. The result of the traffic count indicated that 20 percent of the traffic was oriented to/from the west, 73 percent to the east, and 7 percent to the south. The conclusion is that the overwhelming majority of the traffic to and from the south on 16CP Avenue SE is not destined to the 156t' Avenue SE/142ad Place intersection. Furthermore, the percentage of trips oriented to the east could be significantly higher when school begins as Liberty High School is located east of 1600' Avenue SE and would be accessed using SE 144d' Street. The conclusion of the analysis is that with the opening of SE 1361' Street there is not likely to be an extensive redistribution of the 1600' Avenue SE traffic oriented to the south to the 150h Avenue SE corridor. Therefore, the 26 percent distribution to the south is a reasonable representation of trip distribution with or without SE 1360' Street. This percentage was also applied to the AM peak hour analysis which represents a `worst case" scenario AM peak hour scenario at the SE 128" Street/160t' Avenue SE intersection. I• DN Traffic Consultants Page 6 l* Traffic Impact Analysis Addendum #1 Liberty Grove 5f. Updated traffic accident history (that is, include 2002). Additional traffic accident data was obtained from King County Traffic Engineering to reflect 2002 accident records. This information is presented in Table 3 below, along with previous accident information. Number of Accidents Total Acc. Avg. Intersection 1999 2000 2001 2002 Acc Rate Rate SE 128'h St/156" Ave SE 4 6 3 4 17 0.58 090 SE 128'h St/160" Ave SE 5 2 4 0 11 0.52 1.30 SE 136'h St/160'h Ave SE 0 0 0 0 0 0 0.90 1) — Accident rate Der million enterinp, vehicles 2) — Average accident rate for type of intersection per WSDOT. According to King County star there was an additional 4 accidents at the SE 128h Street/156"' Avenue SE intersection and no additional accidents at the SE 128th Street/160th Avenue SE and SE 136th Street/1601h Avenue SE intersections. The average accident rate with the additional data has increased at the SE 128th Street/156'h Avenue SE from 0.53 to 0.58 and decreased at the SE 1281, Street/1601h Avenue SE intersection from 0.56 to 0.52. Interestingly enough, there were no accidents at the SE 1280' Street/160th Avenue SE intersection during the 2002 time period. Conclusions Based on the analysis presented above in response to the Plat Screening issues, the proposed Plat of Liberty Grove will not have a significant impact on the surrounding transportation network. This is based on the following: o The AM peak hour level of service at the analysis intersections is within the acceptable range. Furthermore, the average vehicular delay is lower and the associated level of service higher than the PM peak hour LOS at the same intersections. o Without the construction of SE 136`h Street and reduction in the number of lots to the Evendell plat, the PM peak hour LOS remains at an acceptable level at all intersections. Although the average delay increases by 10 seconds at the SE 12$ Street/160th Avenue SE intersection, the LOS remains the same (LOS E). The average delay at the SE 128`h Street/156'h Avenue SE intersection actually decreases by 3 seconds. G The average accident rate at the SE 128" Street/160th Avenue SE intersection improved with the addition of the 2002 accident data. Therefore, it is recommended that the Preliminary Plat of Liberty Grove be approved from the traffic impact standpoint. 1• DN Traffic Consultants 10 Page 7 Traffic Impact Analysis Addendum #1 _ _ Liberty Grove TECHNICAL APPENDIX PRELIMINARY PLAT OF LIBERTY GROVE DN Traffic Consultants Liberty Grove SE 128th Street1166th Ave SE ® AM PEAK HOUR r EBLT EBT EBRT WBLT WBT WBRT NBLT NBT NBRT SBLT SST SBRT 0 23B 96 51 511 0 378 0 364 0 0 0 1638 ,IN rm 0 19 1 33 82 35 1796 15 1811 l0 0 0 x 0.. 0.93 0.99 0.91 0 • 2003 Existing AM Peak SE 128th Street/156th Avenue SE 7/23/2003 -�' --> --I 's- o-- 'I- ` t t�' \' � W Total Lost time (s) 4.0 4.0 4.0 4.0 Frt 0.96 1.00 1.00 0.85 • Flt, Protected 1;00 ' ��.9Q1,00;"' Satd. Flow (prat) 3387 3523 1770 1583 F.lt Pyrrit d. =.°: 1.00' E° ',, 0.90.E , 0.95 Satd. Flow (perm) 3387 3174 1770 1583 :7 J Peak -hour factor, PHF 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 njT104� x� " 0 Lane Grouo Flow (voh) 0 363 0 0 610 0 411 0 396 0 0 0 Protected Phases 4 3 8 5 Permitted iPhases . .,��,,. �,.�„, g „ E,1 �.m. �6 �� -- Actuated Green, G (s) 10.6 10.6 7.2 7.2 ffect�ve.GEeen;_gfl 6 �'" f `-f 1'0:6 - a. 7�.2� - 7,2: Actuated WC Ratio 0.41 0.41 0.28 0.28 Vehicle Extension (s) 3.0 3.0 3.0 3.0 �,irer�p�h} k�s 31;392. >z " .. ��. °' - as - _ , �d 1304 4 - v/s Ratio Prot 0.11 0.23 • Ws, s..Fiatio Perm r_ ., r,, .F= ' .- 0.1'9 g ' 1 0!25 v/c Ratio 0.26 0.47 0.83 0.90 ,Unifaim'©blay, d _} 5.0 ;€ 5.5 8.7 67. 8.9. �r Progression Factor 1.00 1.00 1.00 1.00 nC err`►erita.D'hel y;�d, �,�;re�`��•:0:�,�'��'�`� 0.� ;.,`�""`,.,.. � . . - 202. .. ,�,,. , Delay (s) 5.1 5.8 20.1 2,9.:.g..1 fjn_{p', ' ® y' B t. ' Approach Delay (s) 5.1 5.8 24.6 0.0 Abbroacfa :LOSS J2 A • HCM Volume to Capacity ratio 0.64 ctuated,C cle L6 th sL +: 25:8. Sum o 'lost me (5 . B.,Q�4 Intersection Capacity Utilization 58.0% ICU Level of Service A ritiaal.aneGraup, E --- Baseline GARRYSBELL-ST51 • Synchro 5 Report Page 1 2005 AM Peak Without Project SE 128th Street/1 56th Avenue SE 7/23/2003 Fri 0.95 1.00 1.00 0.85 LIEN n M-5-1 4721 � 1 7 MUM, -i Satd. Flow (prot) 3369 3524 1770 1583 'jf'fFlN`N�F q 7V" Uv ,�A t5, Satd. Flow (perm) 3369 3151 1770 1583 Peak -hour factor, PHF 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Lane Group Flow (vph) 0 425 0 0 656 0 464 0 408 0 0 0 04 Off, F IY7 9 W 7 E 41 1. A Protected Phases 4 3 8 5 IMe,r � ffl- rfiL, 1f Actuated Green, G (s) 10.9 10.9 7.3 7.3 Actuated g/C Ratio 0.42 0.42 0.28 0.28 Vehicle Extension (s) 3.0 3.0 3.0 3.0. v/s Ratio Prot 0.13 c0.26 v/c Ratio 0.30 0.50 0.94 0.93 P Progression Factor 1.00 1.00 1.00 1.00 m®r-OFAY-4 MINVY-KNAN-1 F20,'n -A W. i"7 Delay (s) 5.2 5.9 35.7 34.4 Approach Delay (s) 5.2 5.9 35.1 0.0 Intersection Capacity Utilization 64.2% ICU Level of Service B Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 2005 AM Peak With Project SE 128th Street/1 56th Avenue SE 7/23/2003 Total Lost time (s) 4.0 4.0 4.0 4.0 Frt 0.95 1.00 1.00 0.85 ff, -Pr-o tWq-.tq-d, 2A. 1. 71] - -1 1 U.95 1-777 115 0 07,� 77, 71,7.7"7-11 Satd. Flow (prot) 3367 3524 1770 1583 Flt,Pqr #04 -5367 0.95 .-71L --00 Satd. Flow (Perm) 3152 1770 1583 40 Peak -hour factor, P H F 0.92 0.92 0,92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Protected Phases 4 3 8 5 Actuated Green, G (s) 11.0 11.0 7.3 7.3 Actuated g/C Ratio 0.42 0.42 0.28 0.28 U -14. 0 Fa'rahoeT s� T -i4'0' 7-0-7- `F'7 T� Vehicle Extension (s) 3.0 3.0 3.0 3.0 439 v/s Ratio Prot 0.13 c0.26 v/c Ratio 0.31 0.51 0.95 0,93 fix; ..fig Progression Factor 1.00 1.00 1.00 1.00 Jncriernontal Delay, AZ, 0:3 27.2 '--25.9 Delay (s) 5.2 5.9 36.5 35.2 -6vOff SeNO "A D, Approach Delay (s) 5.2 5.9 35.9 0.0 I-D 7 �=A 0 Fn meiry, • HCM Volume to Capacity ratio 0.68 t--7------ Actyat4d'CLcIeiLpng!h (s) 72 63- Sumo lost #ime'(s-= c " 8.0 Intersection Capacity Utilization 64.7% ICU Level of Service B ^731 7., �7�' 71'7 is Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 7 Liberty Grove SE 136th S11160th Ave SE ® AM PEAK HOUR 7 Lm �m 7 O L Q d) Y ttl CJ C _C � O IE Y a �F- y a L � Q (� o Y g G N fOV m a d EBLT 0 0 8 0 8 0 8 0 0 0 0 0 1 1 0 0 EBT 0 0 0 4 3 7 EBRT 4 WBLT 3 0 0 0 3 0 3 0 0 0 0 0 0 0 0.47 O WBT 5 0 0 5 i 6 WBRT 0 NBLT 0 0 2 0 10 0 10 39 1 11 0 43 11 54 0.72 0 NBT 1 0 0 0 1 0 1 NBRT SBLT 0 0 0 0 0 1 9 0 6 0 15 6 ]J21 SBT d 0 4 0 40 SBRT 57 1 35 0 93 23 116 110 2003 Existing AM Peak SE 136th SO 60th Avenue SE 7/23/2003 FA -777�7 �EB4�' ��RT' -FBR, - �i(biment WBl,, - -WBT,--. WR9 , NBR NBL NBT 79EI� -9BT SRRM Lane Configurations 41* +T* *4 +T+ NIFE"K Grade 0% 0% 0% 0% plume e T77.7 '73-97771-T Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 jj� I � �17f lbii -r v A 0 1.0 0u . ^" --,�37 01., Pedestrians Mt F-I-ht Walking Speed (ft/s) Right turn flare (veh) T- 7TT 777", Median storage veh) IV? 11�1 R, �r 1 f r'-7-5-37jjTr,--TF IRT 1.111, ',,� ,,� 16 7 k N3 - 5 ri, 7341, vC1, stage 1 conf vol tF (s) 3.5 4.0 3.3 3.5 4.0 3.3 2.2 2.2 cM capacity (veh/h) 933 838 1072 946 839 1027 1610 1565 ' L, 7 % X, 77' -A I. Volume Left 0 3 0 0 orme 16 cSH 1700 995 1610 1565 M. 0 Em- 2! LO 2a p a-c i i 7 0100f , 0.0,1 —. Q., 00 : "0-,00 4; Queue Lencith (ft) 0 1 0 0 Lane LOS A A .6 0.0,,, Approach LOS A A 7-71 1 7 2-7, va JJ Average Delay 1.2 Ee �,'e pt i �6�n�aj�6ffy—Mfl i tht IC . IZ 13 3 7fs r �Vj c e 0 Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 0 2005 AM Peak Without Project SE 136th SO 60th Avenue SE 7/23/2003 -.1 --�> --v < <--- 'I- 4\ t /0- \> -*I E 7 "W OF Lane Configurati ns Sign.=Control`; 0 Free-. Grade 0% 0% 77 0% 0% �folM -67 N-711 , rT �774 EM FEI M 1�' ZI 0 114% 1 Ull -' 7 �F, ATI-, Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 HourljIfIFo6-w--4ate'(Te 3 -11;,, ',4 47 r:,. �J 6, Pedestrians ;7 E-En' e , W", i d t h,� -2,25777,,] Walking Speed (ft/s) C Right turn flare (veh) K -7- -. :�,,,:q e spa -� , 7 -77 0, Median storacie veh) e 1 conf vol tC, single (s) 7.1 6.5 6.2 7.1 6.5 6.2 4.1 4.1 RC. 2. staa6 (sl.:,, "t I L, - , .1.7 77' tF (s) 3.5 4.0 3.3 3.5 4.0 3.3 2.2 2.2 '00 99- 0,404 -.E? �� � � '. -57" r -1 V .0 peu, , , Lffi?&.. F%,��7 _777-1,� cM capacity (veh/h) 881 797 1060 884 795 1022 1595 1559 1,77 77 77-17. P'k 6;', -JEW 7�` 7, 9 57 tT- : 7 70 77" =1 17 , "I " , '! � I Volume Left 9 3 11 0 09 1 --um e E:i L: 7, _.� �4ILI' cSH 934 965 tV 1595 1559 ro- wi 7 11 0 N w T" T =1 1 7 1 471',��7 ,'77AN Queue Length (ft) 1 1 1 0 =ontro�i Lane LOS A A A gs: NXI Approach LOS A A J,qfqT qft§ummary, Average Delay 2.7 � 'P-., � p =,W-7 �r-itans`e-cfi n,,, 10�if ARvel b 18erv`i0e 0 10 Baseline Synchro 5 Report Page I GARRYSBELL-ST51 10 2005 AM Peak With Project SE 136th SO 60th Avenue SE 7/23/2003 77e Ww'K-7 py Y,�P OR WB., Bff`� NPE NO -7r�-JI4,0� BLS $8T, Lane Configurations Sign �T�Lto P-7 ,-, Stop Grade 0% 0% Fr2e, 3 0% ..r6P; 0% L WLurTie',(Vehlh -.J.� 3r s '0 761,0 5 'J. Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0 0.92 0.92 17; 7 , =F3�,Iw 0.92 0.92 7 7, 0.92 0.92 0.92 -74 Pedestrians WalkingSpeed(tt/s) Right turn flare (veh) 0 JYMUW11-11,11y"RS, �—, Median storacie veh vC1, stage 1 conf vol ,W2-, stae 2 conf-vol- tC, single (s) 7.1 6.5 6.2 7.1 6.5 6.2 4.1 4.1 �1.71. 7, 7 --, =7', tF (s) 3.5 4.0 3.3 3.5 r 7 7%1 , �,9; .,., �Lq�r,�ee�. ME, I IPQ'� 4.0 Ppo�q 3.3 2.2 2.2 DO .1I cM capacity (veh/h) 852 776 1051 848 774 1006 1587 1544 "77777 # YV13'1 N511. oiume�T,6�711W T;,-- 10 28 Volume Left 9 3 11 1 VL61 —umeK,111[9-�h�t,�, E 7 cSH 923 947 1587 1544 ur",�Illr�RA �7-77N-W-77'n hi 64-in, 7 7 -7 Queue Length (ft) 1 1 1 0 • =ontroLp ''043 Lane LOS A A A A Approach LOS A A - * q T " At Et, - Average Delay • 7 2.6 - h!�)FbcnCap Utili2d-tioF-,-.71U--T 7-7 ],,5v of -9'ervi ce 7-7k77-7 0 0 Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 I* 4D Lm i� Liberty Grave SE 128th StreetI168th Ave SE AM PEAK HOUR CL a a EBLT 0 EBT 999 EBRT 7 WELT 7 WBT 506 WBRT 1 NBLT 33 NBT 0 NBRT 26 SBLT 4 SBT 0 SBRT 10 1193 0 z N m 0 12 0 0 10 0 1 0 1 0 0 0 a a 0 U 0 4 2 9 6 0 9 0 16 0 0 0 K a C FL 'a 24 46 27 1282 s a. mm m mm u 26 1308 I � U n ~ s Y a a 0.89 4.8 0.88 6 O.81 0 O.B2 0 2003 Existing AM Peak SE 128th SO 60th Avenue SE 7/23/2003 \> IM We me nt, , 7", BBB • E BT E 6 I`R Aw _NBf�!, _,:3 N NIBR -"SBL` 9TV Lane Configurations 4T+ 77 Z ,fip::I jj Grade 0% 0% 0% 0% cy 6 �um 1777� 7.7 73R37,� Peak Hour Factor 0.89 0.89 0.89 0.88 0.88 0.88 0.81 0.81 0.81 0.82 0.82 0.82 ogry-ficK2 e -fi O '41 71 Pedestrians baneW �-idt fi Walking Speed (fUs) FeTc'ent 9!Lck Right turn flare (veh) P-edi2h t777, 7 " �ET Nonce Median storage veh) !7, ,icon I of Nlw,907772 M77�=M�� 71 g nl,� T,4'07 vC1, stage 1 conf vol ,762-,:sta b 2 n �,- -7pr7rT- tC, single (s) 4.1 4.1 7.5 6.5 6.9 7.5 6.5 6.9 � 0 , , - 0 LGL!�j - --1 tF (s) . .r ,I P � 2.2 2.2 3.5 4.0 3.3 3.5 4.0 3.3 free Lq�!eud f --1 -60 % i 79� - `100, 95, 00 - .198 cM capacity (vefi/h) 993 908 195 166 655 199 165 709 pirpot0h :UNRY77 .7, 177, 77 R -Mq- W, . -7, NB Volume Total 337 344 295 289 73 17 o um !1ILL �f-` �, , " :45",;�, J Volume Right 0 8 0 1 32 12 SK 7 Volume to Capacity 0.00 0.20 0.01 0.17 0.26 0.04 -.0,',- 0: 25 77, 7 7" Control Delay (s) 0.0 0.0 0.3 0.0 22.1 14.2 g-anq LOS� 1, F3, Approach Delay (s) 0.0 0.2 22.1 14.2 IADoroach�LU977,'." 1� , -" C '.. 8 Intersection Capacity Utilization 31.7% ICU Level of Service A 7T-7E, �7, F 7 �71 It Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 t 0 0 9 0 L� 0 4 0 2005 AM Peak Without Project SE 128th SO 60th Avenue SE 7/23/2003 -,I -� --v 'r 4-- k *\ t /> \> EBL-` WBL .-,W,,BT WSR NBG-'.T' NBT NBFJ. -$13L , SBT'7 Lane Configurations A 1, +T+ U JU 4- ' M9 Grade 0% 0% 0% pf= 5 114104i 0% Peak Hour Factor 0.89 0.89 0.89 0.88 0.88 0.88 0.81 0.81 0.81 0.82 0.82 0.82 !Tko-�,v -rate - �'Zll 03 Dori -1V JS 01 Pedestrians la-ne-V1Ti ft) Walking Speed (ft/s) EEOa. Right turn flare (veh) one., Median storage veh) 605. 1 1 7 J1057, 1357 vC1, stage 1 conf Vol 17LIv, i =v i =Fi' Ir ::77 �,, N,jLrZ ��conf'�V-El �g7,"F, 771F=177711 0:4122 IC, single (s) 4.1 4.1 7.5 6.5 6.9 7.5 6.5 6.9 7 tF (s) 2.2 2.2 3.5 4.0 3.3 3.5 4.0 3.3 cM capacity (veh/h) 969 876 171 145 636 164 144 694 -2� Volume Total 356 366 320 303 96 17 Polume Left .0 0 18 0 43 5 Volume Right 0 10 0 1 53 12 SHE 7 9.T 1 1 700'-- 1�700i- 6' ',36,1, Volume to Capacity 0.00 0.22 0.02 0.18 0.34 0.05 Control Delay (s) 0.0 0,0 0.7 0.0 23.9 15.5 C. Cane Le OS .1Z Approach Delay (s) 0.0 0.4 23.9 15.5 A II-L, -�" -- ;_, - -_,- 7, 7, 07_77 Baseline Synchro 5 Report Page 1 0 GARRYSBELL-ST51 2005 AM Peak With Project SE 128th SO 60th Avenue SE 7/23/2003 EBU: FpT,.--_EBR' WBU,.WBT!. NR ..�.-NBTI"�-,NBR BT SM Lane Configurations 44 r ee, :b -p Grade 0% 0% 0% 0% L6- ' EVe-ffL/flff 17,76777,63M = -,"'-4-:7-",7,-0-, 16 Peak Hour Factor 0.89 0.89 0.89 0.88 0.88 0.88 0.81 0.81 0.81 0.82 0.82 0.82 - 11, 112 26?': 603,:" '54' rate(v6h/h 0 Z O �63 5 Pedestrians Fcf h 0 �,anq& L-1 Walking Speed (ft/s) 0 Median storage veh) . I I I I I I ..... I I '77 vC1, stage 1 conf vol tC, single (s) 4.1 4.1 7.5 6.5 6.9 7.5 6.5 6.9 �2f tF (s) 2.2 2.2 3.5 4,0 ry 3.3 3.5 4.0 3.3 cM capacity (veh/h) 969 875 165 140 635 153 139 694 rRrr0,Q'h,'Lah.eT E 'V, B I E -, W r3"'Z' N B I S B TL, Volume Total 356 368 328 303 117 17 VoldMe :Left 0 26 077, 54 -715 Volume Right 0 12 0 1 j-69, 1� 77, 1,11RO 63 12 Volume to Capacity 0.00 0.22 0.03 0.18 0.43 0.05 0 Control Delay (s) 0.0 0.0 1,0 0.0 27.7 16.0 Approach Delay (s) 0.0 0.5 27.7 16.0 77:L-7- .7-7,71-.F 4 ntersection Capacity Utilization 41.6% ICU Level of Service A % Baseline GARRYSBELL-ST51 Synchro 5 Report Page 1 Lm Liberty Grove North Site Accessl160th Avenue SE AM PEAK HOUR r-A Sri. EBLT 0 EBT 0 EBRT 0 WELT 0 WBT 0 WBRT 0 NBLT 0 NBT 44 NBRT 0 SBLT 0 SBT 9 SBRT 0 53 10 L O Q U W 2 d y O m IL U CD C a o G Q' � T E U` 7 0 0 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 19 0 56 10 0 0 0 0 0 0 0 0 0 0 0 10 0 19 4 0 0 0 0 5 1 29 .0 75 30 105 }U l� 0 Y Q. 0 0 0.72 0.53 N 3 2 a 0 0 0 11.1 0 0 L] r L I & 2005 AM Peak With Project Site Access North/160th Avenue SE 7/23/2003 --4 --V *\ .................. Lane Configurations To Grade 0% 0% 0% 77 - 16�6 "Q�Z =4-,, Peak Hour Factor 0.92 0.62 0.92 0.92 0.92 0.92 ILOU—rl .flow rate, Ve h)--� Pedestrians Y�i Eth (q =1 Walking Speed (ft/s) Median storage veh) 1, stage 1 conf vol cM capacity (veh/h) 899 1048 1582 7: 77:7 E B1111, L 1 T :C2- 7 Jolume Left 8 0 0 ITolum�61wi5Ft" '-7 7,"-F777 7 -7 77 EZ, cSH 948 1582 1700 .Z Approach LOS A Average Delay 0.9 Jnfbr§ectiohiCa 'aci Utilization,` -.,,Le oF:§ervice- Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 U Liberty Grove South Site Access1160th Avenue SE AM PEAK HOUR 52 • m n d C a d U 0 0 0 0 0 0 0 13 0 0 10 0 23 0 .o `o m s a0 u Q a 0 0 0 0 0 Cl0 0 0 a 0 0 5 5 0 0 0 0.47 0 0 10 10 0 0 0 54 1 55 0.72 0 0 1 6 1 6 0 22 4 D 26 0 0.53 11.1 0 76 27 103 E • 0 E 2005 AM Peak With Project Site Access South/160th Avenue SE 7/23/2003 Grade 0% 0% 0% =e'�e �F, ; �4-, ,. 55 26-T7 , 7 Peak Hour Factor 0.92 0.92 our, Inu ve 0.92 0.92 0.92 0.92 71-77 72­1 Pedestrians Walking Speed (fYs) 11 B I Ld K�i g 77 Right turn flare (veh) Median storage veh) �n f I �—irq t —in 0 vCI, stage 1 conf vol tC, single (s) 6.4 6.2 4.1 tF (s) 3.5 3.3 2.2 "'Tooi- -AL': eiqf> 714 ';I'K 4,1 cM capacity (veh/h) 893 1005 1542 [77 -77 Y - -T -8i I ... " -, �7, � : , -. � 7 , "I . - . I A 17: tolume Left 5 0 7 =um-e`tq cSH 965 1700 1542 81. 0 Approach LOS A t pft 7 7 1777 7777, 27, Z r W. -7 Average Delay 1.7 nterpecti n, a acit .; ° tifjz°W Baseline Synchro, 5 Report Page 1 10 GARRYSBELL-ST51 Liberty Grove (With 46 Lot Evendell and no SE 136th) SE 128th StreeU156th Ave SE . FM MAK NUUK c�. EBLT 0 EBT 635 EBRT 386 WBLT " 312 W BT 399 • WBRT 3 NBLT 170 NBT 0 NBRT 102 . SBLT 0 SBT 0 SBRT 0 2007 4) . i-0 40 M Er 1 9 26 0 0 14 7 0 0 0 90 J000 49 2186 Er F d r 3 21 2207 1 • 7/231036:38 PM 2005 PM Peak without Project - 46 Lot Evendell/No SE 136th SE 128th Street/156th Avenue SE 7/24/2003 RZTK777t Of T7,W6C77WE-3T, TR-Br'� 'IN, W-7 7T 7 ,17 71 .... .. . .. ... Lane Configurations 18`631" __fd"W"*_( �O­r -74i'7,7`�7777 17717 Pj Total Lost time (s) 4.0 4.0 4.0 4.0 4.0 Fa N e7Q-fJ:Jr �p 7ct 07rl- 7_1;'T:00 ti,W 7 Frt 0.94 1.00 1.00 1.00 0.85 F'11 ijap. rotepteo,-- 10( Satd. Flow (orot) 3336 1770 3539 1770 1583 Peak -hour factor, PHF 0.92 0.92 0.92 0.92 0.92 0.92 T "T I , 4E , - �9 ' 7 Lane GrouD Flow (vph) 1214 0 351 480 211 . 1 16 Protected Phases 4 3 8 2 Actuated Green, G (s) 15.6 23.6 23.6 10.2 10.2 Eff cti e. G e- WES `23 � �2 ., - 0.2 �316 1 09LO Actuated g/C Ratio 0.37 0.56 0.56 0.24 0.24 v/s Ratio Prot 0.36 c0.10 0.14 c0.12 7 '-, v/c Ratio 0.98 1.01 0.24 0.49 0.30 Progression Factor 1.00 1.00 1.00 1.00 1.00 ncremerilalDeia,.ci21_, J 0 4,1 Delay (s) 32.6 59.5 4.6 14.4 13.3 Approach Delay (s) 32.5 27.8 14.0 N1- Intersection Capacity Utilization 76.7% ICU Level of Service C rl t I � �!' J, I i .�' J, � i Baseline Synchro, 5 Report Page 1 GARRYSBELL-ST51 2005 PM Peak with Project - 46 Lot Evendell/No SE 136th SE 128th Street/1 56th Avenue SE 7/24/2003 ---> ­t' 'r *- ,\ /> FM 5 EW k L'E 7' `90BT- NW-7,7 .377. `7- Lane Configurations Total Lost time (s) 4.0 4.0 4.0 4.0 4.0 00 2120 Frt 0.94 1.00 1.00 1.00 0.85 Flt 4 Satd. Flow (Prot) 3338 1770 3539 1770 1583 Satd. Flow (perm) 3338 376 3539 1770 1583 r �1�117T . ....... . 79;62 ,.3 3 450; P4281, 2 Peak -hour factor, PHF 0.92 0.92 0.92 0..92 0.92 0.92 vpjh, �-i 763,- 465�',, '.351 89P, 211 � . ;'- I Lane Group Flow (vph) 1228 0 351 489 211 116 Protected Phases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ . . . . . . . . . ........ . . . . . . . . . 8, ;'­ - "J ­.- �­. % ' 7._7`FT","7 "'a, 3 �1?�770= Actuated Green, G (s) 15.8 23.8 23.8 10.2 10.2 i-2, 0. 2;,�,;, 1 2 Actuated g/C Ratio 0.38 0.57 0.57 0.24 0.24 v/s Ratio Prot 0.37 c0.10 0.14 c0.12 �7Ratio, v/c Ratio 0.98 1.01 0.24 0.49 0.30 - T' - Proaression Factor 1.00 1.00 1.00 1.00 1.00 W Delay (s) 32.9 61.2 4.6 14.6 13.4 Service ce-.,.. Approach Delay (s) 32.9 28.3 14.2 Vk�oEich Intersection Capacity Utilization 77.1% ICU Level of Service C ,' -Ch4c-al Le Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 �m Liberty Grove (With 46 Lot Evendell and No SE 136th Street) SE 128th StreeVI60th Ave SE PM PEAK HOUR Of EBLT EBT EBRT W BLT WBT WBRT NBLT NBT NBRT SBLT SBT SBRT 0 651 48 44 655 1 19 0 22 3 0 1 1444 • li 28 0 9 0 0 1 0 0 69 38 1579 42 1621 j 71231036:51 PM 2005 PM Peak Without Project -46 Lot Evendell/No SE 136th SE 128th Street/160th Avenue SE 7/23/2003 tavereniy _ �fTBL� _ �.'EB_ 1Nf 7� WR.�:;`,fVBTBfl;; :3..T ,f BF Lane Confiourations� d G I-T G A, 4L Grade 0% 0% 0% 0% ,°} Ox-rr685"81 54,94 -.�1°•;8'.X:� Vo,ume�vehlh Peak Hour Factor 0.89 0.89 0.89 0.88 0.88 0.88 0.81 0.81 0.81 0.82 0.82 0.82 iflowr e;�{vehlh q 770 :9 6 i " .; 789 1.g 35 ,,`0 40 4 .0 1 Pedestrians i one Wi td h (ft;q • Walking Speed (ft/s) Median storage veh) ,`conflicti alu_me - a_79__0° A861;<. 1,3 17?;3 95 e R vC1, stage 1 conf vol tC, single (s) 4.1 4.1 7.5 6.5 6.9 7.5 6.5 6.9 �.. tF (s) 2.2 2.2 3.5 4.0 3.3 3.5 4.0 3.3 cM capacity (veh/h) 826 777 105 81 573 98 76 604 �. _..._ ..,... m...�._ ,.... Volume Total 385 476 456 395 74 5 otn_e_LQfi Volume Right 0 91 0 1 40 1 `.,777: Volume to Capacity 0.00 0.28 0,08 0.23 0.40 0.04 J5Ge� u eri #I��ft ;. 0 :0'°, 6 p„ 44 3, ., Control Delay (s) 0.0 0.0 2.2 0.0 36.5 35.3 ILI Approach (s) 0.0 1.2 36.5 35.3 jDelay pproac "LQ7 Intersection Capacity Utilization 63.6% ICU Level of Service B Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 0 E r] 0 2005 PM Peak With Project -46 Lot Evendell/No SE 136th SE 128th Street/1 60th Avenue SE 7/23/2003 Lane Confiqurations *T T+ Grade 0% 0% 0% 0% I lu o-, Ve Peak Hour Factor 0.89 0.89 0.89 0.88 0.88 0.88 0.81 0.81 0.81 0.82 0.82 0.82 JI Pedestrians Lan Walkinq Speed (ft/ s) Right turn flare (veh) �ne N e -N Median storage veh) 1814 395 75 vC1, stage I conf vol :cant '­7 tC, single (s) 4.1 4.1 7.5 6.5 6.9 7.5 6.5 6.9 7 T-1777, 7 tF (s) 2.2 2.2 3.5 4.0 3.3 3.5 4.0 3.3 Uer f rWF-77.7, � �",t , z - "r 4 00, "�'..9 _96 10 100 cM capacity (veh/h) 826 767 98 75 567 878, 70 604 '!IN7"W E 9� :Z1-9 WD'--.191D 1179'1 1 . 7 - w Volume Total 385 490 469 395 95 5 V.6 UtW15-- �ef �tw,7 .�O- =-,O, 44, 4- Volume Right 0. 106 0 1 51 1 °1,7 174 Volume to Capacity 0,00 0.29 0.10 0,23 0.54 0.04 7,57,77 77�70A.7 eu, Control Delav (s) 0,0 0.0 2.7 0.0 47.9 38.6 Approach Delay (s) 0.0 1.5 47.9 38.6 [AbBioaGF'LUS,. Baseline GARRYSBELL-ST51 Synchro 5 Report Page 1 Liberty Grove (With 46 Lot Evendell and No SE 136th) SE 136th St/160th Ave SE ® PM PEAK HOUR a 2 4 EBLT 0 EBT 0 EBRT 0 WELT 1 W BT 0 ® WBRT 2 NBLT 0 NBT . P138NBRT SBLTL697 SBTSSRT 100 1 0 0 1 0 39 0 56 0 0 0 0 157 31 188 7/2310311:19 PM 2005 PM Peak without Project - 46 Lot Evendell/No SE 136th SE 136th Street/1 60th Avenue SE 7/24/2003 1- 4- t e \> b Lane Configurations Grade 0% 0% 0% Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 Ho iVe, i ­'� 77171.7.17 Pedestrians Right turn Mbdia�,­W66,"'-V "None I t "Vr_'.'II Median storage veh) 715, r I ��fp �' T 7777 vC1. staue 1 conf vol tC, single (s) 6.4 6.2 4.1 "Ini - S' 7775 tF (s) 3.5 3.3 2.2 e e cM capacity (veh/h) 809 1032 1568 Y51 Eta fL7,. L'2 Volume Left 1 0 10 i AS cSH 945 1700 1568 0 IV—= ut'ne7FC, i� 0.06 0.02 0.01' Queue Length (ft) 0 0 0 Lane LOS A A '6,.'-6- 77- -.17, =17717 Approach LOS A 7 Average Delay, 0.6 be n -a iff ItEafit 17-30 �=!W,6760.df Baseline Synchro 5 Report Page I GARRYSBELL-ST51 2005 PM Peak with Project - 46 Lot Evendell/No SE 136th SE 136th Street/160th Avenue SE 7/24/2003 � k- t /,* ,> Grade 0% 0% 0% Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 fly�33 - 7,1' =fp=wrate �(Te Pedestrians E-'a:h :e�V—V Width M (t, C, �:,V,R, -7, 7," f Walking Speed (ft/s) Median storage veh) 777 vC1, stage 1 conf vol cM capacity (veh/h) 775 1013 1549 J;. cSH 955 1700 1549 Approach LIJ6 A VO-tOr$ecfqnraQinrnaq Average Delay 0.7 6rs6dtiq�!7G—A-p.—�city li2a=mFI —,M-5% Eev''mice r' Baseline Synchro 5 Report Page I GARRYSBELL-ST51 • Liberty Grove (With 46 lot Evendell and No SE 136th Street) North Site Access/160th Avenue SE • PM PEAK HOUR 0 u • SBLT 0 SBT 76 SBRT 0 96 a o as .. a d Y g a = s 5 o t to 8 � 3 L S o 8 Ad 0 0 0 0 0 7 7 0 0 0 0 0 0 0.9 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0.9 0 0 0 0 0 0 0 0.9 0 0 0 0 5 5 0 17 0 37 13 50 0 0 0 0 0 0 0 0 0 0 0 0 0 2 39 0 117 14 131 0 0 0 1 D 10 1 10 2 56 0 154 50 204 712310311:21 PM 10 1* 10 10 2005 PM Peak with Project - 46 Lot Evendeil/No SE 136th North Site Access/1 60th Avenue SE 7/24/2003 -il � -N t b W 2-911 7,957-7, W 77'777 7*L"_I', 4:7 L, Lane Configurations *T :b:n:t:r._orT Grade 0% 0% L90:1:q:M�eV661 , T+ 0% Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 aEYIP e, =Veh Pedestrians J Walking Speed (ft/s) Percent: ___ I =oc:k: :aq— Right turn flare (veh) vC1, stage 1 conf vol -77 tC, single (s) 6.4 6.2 4.1 7 xi tF (s) 3.5 3.3 2.2 cM car)acitv (veh/h) 772 899 1427 IDIraction " �4f n 'I" B I'L, wo-lu Xiota�9. I�iPp`• 15 & - - Volume Left 8 5 0 4 7- cSH 786 1427 1700 =, U'00'.' i 'to'­",�" 01 0 (-,apacIV_'7 . T' 77 Queue Length (ft) 1 0 0 .U-6�ntrol Dsla .. KE7 Lane LOS A A 9�iA�' --0.7 Approach LOS A Average Delay 0.6 NO CS A P'Latk Baseline Synchro 5 Report Page I 1* GARRYSBELL-ST51 • Liberty Grove (With 46 Lot Evendell and No SE 136th Street) South Site Access/160th Avenue SE • PEA PEAT( HOUR i a A 211 68 a 89 t a c Y U U � Y 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21 0 0 0 0 39 1 0 0 1 60 0 0 0 0 0 150 C7 d w $ ei 'o a 0 0 0 0 0.9 0 0 2 2 0 0 0.9 8 8 0 0 5 47 0.9 7 14 7 14 1 109 0.9 0 0 37 187 7123/0311:23 PM 2005 PM Peak with Project - 46 Lot Evendell/No SE 136th South Site Access/160th Avenue SE 7/24/2003 Ip T"80 WBR7NBNBR B W'T' Lane Configurations Grade 0% 0% 0% .4 Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 -2 Pedestrians 0 �� ro U) Median storage veh) C con 0 *q' 5 5 t1h wdlum tF (s) 3.5 3.3 2.2 -A., 9W,'; cM capacity (veh/h) 777 1012 1545 Inc': , --7-- — -7777-� � . ....... .... 77 tj ., � ) IeTd W F-Lor'07-7 I QmntakF 19 m :4 Volume Left 2 0 is cSH 954 1700 1545 Approach LOS A 17 477, 777,77700,,,�9.77 Average Delay 1.1 I TO. U Gdvel bugE 2 Y�,—U�filiz4t Baseline Synchro 5 Report Page 1 GARRYSBELL-ST51 r] 0 0 0 m 0 m E z LU J LL W n 0 U 0 W 13 w m E z u 0 ce CL King County Department of Development and Environmental Services 900 OakeskL* le AvenueSoutimvest Renton, XNA 98055-1219 0 NO 1 ES --=" MEMORANDUM Date S • � ' 3 Fr EL-o Ctt-CIG y. 23.3 FROM: Site investigator B ETH C H Es H I ER TO: Engineer BRUCE M+ (777� IC -Di< l lc SCi-}) RE: Field Check Observations I. PROJECT NUMBER 1. NAME U 3 PCD 00 S/ L 13EP-TY C-i R oU E C-CNTT( U o Address 1 Location 1.2- + l Related Project # 1 Name LC) Thomas Map Page (new) (057 Thomas Guide Page (old) 2. SYNOPSIS OF PROPOSAL UE 1 I E 742 A 02 - I t\rM 562 NUTS W> 12EQQE=D P-E Z--�E- E90H 12,- F:7I nW CpNTRpL LEVEL 2 i unA'S 5� MMUNWONOWNEM : 3. SIERRA FILE INFORMATION Parcel #(s) ILA U S-T-R SE i HIS, U 5 Kroll Map Acres 1 FeeO -7. 9 2 A Current Zoning RA Community Plan N EWCAS L Comprehensive Plan Limited Text Entry N U C-Dm412oL1s PAGE I 4. SENSITIVE AREAS INFORMATION MAP FOLIO PAGE# SITECONTAINI SITE ABUTS YES NO TES NO COMMENTS • Wetlands - 0 ❑ F ❑ _ PER S I TE EL,&M _ Wetland # Wetland Class Drainage Basin Sub Basin IOW FR C� j Critical Basin? 0 ❑N • Streams ❑ [�q ❑ !fix Stream Class • 100-year Floodplain _ ❑ • Erosion Hazard ❑ • Landslide Hazard ❑ • Seismic Hazard ❑ Stream Name ❑ P1 -- El M ❑a • Coal Mine Hazard _._._❑ ®­❑ (0 • Other known SA's .Y 0 ❑ ❑ ❑ Class I or 2 Stream or Class I Wetland within one mile downstream of project site? `(ES FEMA FIRM number _.53o3.3 C_ og?)2 F In FEMA Floodplain? ❑ 9 Soils Mapped Best available Topographical Map C ITY OF RL)IMN I(�q(a 1's S. SITE DESCRIPTION MATCHES T.I.R. DESCRIPTION? Map # 11 /a + lvi+J i •2. Jill v lall� '� ■ R f auawwgm-my, IN 14 �NJ PAGE 2 d. EXISTING SITE FEATURES Unmapped Sensitive Areas: S ill ELD 0 QZW rh o n OJ Qrega-fh,7 n a Soils types seen and evidence of soil movement, slides, slumps, erosion, or deposition: NO SOIL HW i S Ground Cover: PAS-N4ZE C=aeASS 9-USH &M Ve7_a Existing Utilities (hydrants, signs, poles, etc.) shown on site plan? Wildlife and habitats: DEE9., SONS Water Wells: IONS suvw Work started on site? - N Q Closed depression ?5000 feet=? 0 Dd Steep slopes? v❑ 7.. DRAINAGE Drainage complaint records Proposal will add >5000ft2 of new impervious surface? © ® Approximate Area Proposal will collect and concentrate surface and storm water runoff from an upland and site drainage area of over 5000 fc2? IT © Approximate Area Upland Drainage Basin (draining directly onto site): I CL N TD S our-_ 14 OF S r-FE !IL CAAM0. E PE 511JID T)I On -site Drainage: F_ S 11E VT 4 E TN CoLL!jj IN' D H - S AND Q1lZ9TM TO SHE WtM Downstream r r lt� all► Q1_ 6LLJA Ms=PA-RCEL, r 6WF' I UEENED P94D IM s • 0 1 Drainage Description Matches T.I.R.? PAGE 3 B. EXISTING ROAD NETWORK Adjacent Roads SE 1316T -i ST _ __- ALC7W L-� L1001A, „ „ProPoned GQe-C e s s I bOTH A\JE S LON b WET _1.(eZND AilE SE ALQW(a VAST No ACCEss asec Closest Transit Stop B. ESTIMATE OF PROJECT IMPACTS ON SOIL AND WATER Q R snN(a DcwSST F'l A4 ? 29QP0SG7D WCL)W:� LI1 ELe 9. ADDITIONAL COMMENTS F i G u 12.E S 2- H OF N_o _ _5 , 2c C7.2 N-ASrwr -rtzH' S c ,.,, PAGE 4 1 10 CONSTRUCTION SIGNS WITHIN SOO FEET AND ADJACENT USE I I NUMBER OF PHOTOGRAPHS TAKEN PAGE 5 ATTACHMENT TO MEMORANDUM PROJECT NUMBER: FIELD►OFFICE SKETCH WORK: Drainage systems, features, channels within the upland site plan areas, on the development site, and in the downstream receiving areas: SKETCHED BY: Notes: SCALE PAGE 6 Location; 1SWcorner of nitersection of SE I 36th St! Status: -[�—PPLIED A,F'F!ULANT:1jLAKERIDGE DEVELOPMENT, INC. E3 'ok S op 1-1� J. D, It 1,1'� ;j j� t A; I ME �iriX le ........ ... ON Scram Pe le C I'l Qp6 bzI Slatus:i ]APPLIED 01 I 'N Plat e: lyb�ft�.�rove Contiguous ,N 6. of Lots: l�i 30013 J03/11/2003 L03TY401,iL03P( Des6r: 196tated,tb Applie� 4" '-'1 ., 1, 'i, , �� "; 971 J"jil idl 5 - 85 P�icel No- _F, "t �i ii, 1 4* '4'1� !� �Ill 1, -.4, , ,, Deemi J, 'IM7 0 00 ea Complete: EEL— SWcorner of intersection of S E 13 6th St! Locationv"r 1, k FFI (YVN)jY�-1,Z)t I.LJ:.!:] i llillir' i .City VZP-A enton !Y i I,:SEPA Report:, 0" w-- net: PLATT DAVID.-GEORGIA ... .... A ,licankl!-AKERIDGE DEVELOPMENT,'INC; Open Hearing: Decision: V -1 .1,11 'Ex�' e IF I �,"��er:' JKCLA e it s 1 11 11 "4;j;���.- mo,";: IFIII i; j Ep I$ " 1, 1 � ' � 01 h Rev, -X: 1'q'. !"�i 1,14i '11.1 41T F. 7%, ­7 • r--0cdijpanpy: -Acres: & 00• It. fI V!, tatus ,�e: r0�3/11 1 /2003 ,, Balance Due: Last 5& ltrjt�r'q'd'��`JPINTABER �0- Op�j i DatejEntered-.FPMi1,/2003, --qr, ji, !;q 4; 14 41 jr 1: p.ritt-;- K1Nhrn1JNT.Y1WA' �il�; 41 R04SeidNu t'rmber' 6136 I inVoii Tuesday, Apr 08, 2003 08:52 AM King County - DDES Tuesday, Apr 08, 2003 08:52 AM King County - DDES Tuesday, Apr 08, 2003 08:53 AM King County - DDES Tuesday, Apr 08, 2003 08:53 AM King County - DDES ` , :ruv, i .'-.y.. :I! :.Ln; a- # ri€�s7iu"! r''i r 'i�t•`'... '.',:{:3�1• W'. ,�' io.' :; :.I," ia.. I, 1 • ,'„ .�y .,; ,,.i• - 1,"i"r• ,h' ,, , R,e, I d ttO n d �V a f-13' 6"n't lVial li I V �n Vii I,,i�ll, 11, � lVi I ! 1 It•.�,'i�li ��D�F�elativnsips,�` OkherAssociakions'� 1 i' �` F`. , I ` `.Number: X0001138 1 Status: LINK Dake: 03f2612003 " �i g 141 Tide: Related L03P0i105,06. L03TY401 ', �'l l�l, ilk rl I I r it I i, �� ,, ,..r �� � ,AOP01151 Location: I tlC L03P0006 I aeiect ' C� ,L03 TY401 Aeti�lit New Dev �.,ih, ..i,_ ' d. r r»s•, Select All 'Activities Atta,c`hed4t0 Tf1rS Pfotectu� �,ill:I }'#"CtiYlty No Type" r,i; as.l;i,9 `tit$ rli 't, I�tatUSr, V� e19Cklpl� , • � :TeCr1,Q'�?faF3 �I E tts#irl�jk3,e� . t Add T&S4t i Fem�:�e Ftorh Set r••fra Current sit; .. r „I `4A02P0151. 1, �iS�OfiC esCription Tree select Acti�tities 7a 1 I! Ramo II i P Thrs Prolgct, , I `1; I Ii jP'l1 !1� from Pralectl't;,� Related to LL13TY401. L03P0006 J E1 ! ksl 73l e>a�i17 t�"ir�'1ll �II IV�rlll �I���L�I �����11�•"�� rIi�.I 't'".. - .. € I .. #— �:..�„�I.:�irl�}!I "1�'�,i' iIr' 4;„[.={I��i"n,.iu � IN,Is�.,�, .Vint II„6'i��l;l,,,11 �• ' ` '. � f 1,1�!yp" i 1 i� I , .. la, c1 i4 h � e .,.; ..ul ! 11,�I,1 I, [E � I € !, � , _ .I! l� .�, q41 ll� t 1 lliHll , II,'ki1 �+Ilj I�7 S �r''jl�'IJ�II ,• 14 I k a �3C�C, , E }il�, — f it ,i'"'iy, '� n NNN I 1 llj� ,�t•. III,i I' ',(' "n'l: EIj li'�I '�13'. " c... �' 1 I 4 7 i ( �WH .I: �f illl iti{,I It it .p 1 I' Bak Stop 11� ��.i., `l 'If I'/1111iY.•r.Afi3'fFdEWIp[I(4:P, �,a M'iit.aNG,O:Ih.al4...4-JYL,:+#,Y�:I .,:P.rfH.:Y.O�-. ,L+,f,ldii I tn, ., ,-• m s •I'",',.1:"a':it�R", .,,"_ ...,, �r"fi . !i` !i I R'� "P!�' . , .� �I a Tuesday, Apr 08, 2003 08:57 AM King County - DDES BD07 KING COUNTY DEPT OF ASSESSMENTS BDO1 PA111260-S1 REAL PROPERTY CHARACTERISTICS 04/08/03 08:58:32.1 ACCOUNT: 145750-0085-0 SITUS: 13612 160TH AV SE 98055 TAXPAYER: PLATT DAVID+GEORGIA QSTR: SE 14 23 05 LOT: 1 ELK: 3 PLAT: CEDAR PARK FIVE -ACRE TRS JURS: KING CO * L A N D D A T A * I** B U I L D I N G D A T A ** BLDG 1 OF 1 ZONE ACTUAL BLDG SQ FOOTAGE DATA MISC BLDG INFO JURISDICTION KING CO FIRST FLOOR 1240 YEAR BUILT 1930 ACRES 3.42 1/2 FLOOR #STORIES 1.0 WATER SYSTEM WTR DIST 2ND FLOOR #LIVING UNITS 1 SEWER PRIVATE UPPER FLOOR DAYLIGHT BSMT VIEW NO TOTAL BSMT HEAT SOURCE GAS OPEN SPACE FIN BSMT HEAT SYSTEM FR AIR BSMT GARAGE ACCESSORY. IMPS TIDELANDS I TOTAL LIVING AREA 1240 POOL AREA WATERFRONT FEET I ATTACHED GARAGE POOL CONSTR WFT LOCATION DET GARAGE AREA 1010 WFT BANK ROOMS CARPORT AREA WFT RIGHTS ONLY BEDROOMS 2 MOBILE HOME 0.3) CHOOSE ONE OPTION: PRESS <PRINT> TO PRINT SCREEN, <PF4> FOR LEGAL, <PF6> FOR HISTORY, <PF7> FOR TAXES OR <PF8> TO END. BD07 KING COUNTY DEPT OF ASSESSMENTS BDO1 PAI11280-SI REAL PROPERTY LEGAL DESCRIPTION 04/08/03 08:58:39.0 ACCOUNT: 145750-0085-0 SITUS: 13612 160TH AV SE 98055 TAXPAYER: PLATT DAVID+GEORGIA QSTR: SE 14 23 05 LURS: KING CO LEGAL DESCRIPTION - PAGE 1 LOT 1 BLOCK 3 PLAT: CEDAR PARK FIVE -ACRE TRS CEDAR PARK FIVE -ACRE TRS LOT 1 BLK 3 LESS N 100 FT OF W 270 FT & LESS S 29 FT OF N 129 FT OF E 70 FT OF W 270 FT -- PER KING CO ENGINEER SUBD NO 6846 REC NO 9410250673 * END OF LEGAL DESCRIPTION * ( 0.1) CHOOSE ONE OPTION: PRESS <PRINT> TO PRINT SCREEN, <ENTER> FOR MORE LEGALS, <PF2> FOR CHARACTERISTICS, <PF6> FOR HISTORY, <PF7> FOR TAXES OR <PF8> TO END. BD07 KING COUNTY DEPT OF ASSESSMENTS BD01 PAII1270-Sl REAL PROPERTY HISTORY 04/08/03 08:59:03.8 ACCOUNT: 145750-0085-0 SITUS: 13612 160TH AV SE 98055 TAXPAYER: PLATT DAVID+GEORGIA QSTR: SE 14 23 05 LOT: 1 BLK: 3 PLAT: CEDAR PARK FIVE -ACRE TRS JURS: KING CO * A S S E S S E D V A L U E H I S T O R Y S A L E S H I S T O R Y YEAR LAND IMPS DATE REASON I DATE SALES PRICE REMARKS 03 129,000 144,000 07/02 REVALUE 101/99 EXEC DEED 02 122,000 128,000 04/01 REVALUE 01/99 2,000 QCD 01 109,000 119,000 05/00 REVALUE 12/98 2,000 QCD 00 105,000 80,000 07/99 REVALUE 04/94 165,000 DEED 99 141,000 68,000 10/98 REVALUE l 99 124,000 60,000 04/98 EXTENSION } 98 124,000 60,000 09/97 REVALUE 97 124,600 51,700 09/96 REVALUE 96 124,600 51,700 10/95 MAINTENANCE 96 110,900 36,100 02/95 SEGREGATION 95 110,900 36,100 02/95 SEGREGATION * * * CONTINUED * * * I * END OF SALES HISTORY CHOOSE ONE OPTION: PRESS <PRINT> TO PRINT SCREEN, <ENTER> FOR MORE HISTORY, <PF2> FOR CHARACTERISTICS, <PF4> FOR LEGAL, <PF7> FOR TAXES OR <PF8> TO END. BD07 KING COUNTY DEPT OF ASSESSMENTS BD01 PAI11270-Sl REAL PROPERTY HISTORY 04/08/03 08:59:08.3 ACCOUNT: 145750-0085-0 SITUS: 13612 160TH AV SE 98055 TAXPAYER: PLATT DAVID+GEORGIA QSTR: SE 14 23 05 LOT: 1 BLK: 3 PLAT: CEDAR PARK FIVE -ACRE TRS JURS: KING CO * A S S E S S E D V A L U E H I S T O R Y *I* S A L E S H I S T O R Y YEAR LAND IMPS DATE REASON I DATE SALES PRICE REMARKS 95 132,400 36,100 10/94 SEGREGATION 101/99 EXEC DEED 95 132,400 36,100 08/94 REVALUE 101/99 2,000 QCD 94 67,200 56,200 10/94 SEGREGATION 112/98 2,000 QCD 93 67,200 56,200 04/92 REVALUE 104/94 165,000 DEED 91 56,000 46,800 08/90 REVALUE 89 38,300 22,700 03/88 REVALUE 87 38,700 24,200 06/86 REVALUE 85 33,800 26,500 03/84 REVALUE 83 31,000 29,100 03/82 REVALUE * END OF VALUE HISTORY * I * END OF SALES HISTORY 5.4) CHOOSE ONE OPTION: PRESS <PRINT> TO PRINT SCREEN, <PF2> FOR CHARACTERISTICS, <PF4> FOR LEGAL, <PF7> FOR TAXES OR <PF8> TO END. Dev. Cond, Query Result - DDES, King County Washington Page 1 of 1 King County 1. No ix Conditions Found The Parcel Number you entered "1457500085" does not have any Development Conditions. To start over click on the New Query fink below. Updated: December 29, 1998 KingCounty I DDES Pa I DDESIGIS Page I New Query I News I Services I Comments Search Links to external sites do not constitute endorsements by King County. By visiting this and other King County web pages, you expressly agree to be bound by terms and conditions of the site. ihe�lgt is is. http://appsO l .metrokc.govlwww6/ddeslnew_direct.cfrn 04/08/2003 Parcel Number: 1457500085 Taxpayer: PLATT DAVID+GEORGIA Annexation: NIA Jurisdiction: Unincorporated King County Situs Address: 13612 160TH AVE SE Postal City: Renton, 98059 Plat Name: CEDAR PARK FIVE -ACRE TRS Rec: nil Lot: 1; Block: 3 Kroll Page: 811 E Thomas Bros. Page: 657 114-S-T-R: SE-14-23-5 Acres: 3.42 (148975 SgFt.) ---------------------- Current Zoning: R-4 Potential Zoning: Comp. Plan Land Use: um Assessor's Open Space: NIA Commercial Use: NIA Number of Units: NIA Mobile Home: N Land Value: 122000 Improvements Value: 128000 ---------------------- Community Plan Area: Newcastle Unincorporated Area Council: Four Creeks Unincorporated Area Council School District: Issaquah 411 Fire District: 25 Roads MPS Zone: 452 ($212800) Waterfront: PRIVATE Water Service: WATER DISTRICT Water Service Planning Area: King County Water District 90 Sewer Service: PRIVATE Airport Noise Remedy Program: NIA Bald Eagle Flag: NIA Council District (1996-2001): 12 David Irons Jr. (R) Council District (2002): 12 David Irons (R) Drainage Basin: Lower Cedar River, WRIA 8 Police: King County, Pct: 3, Dist: F2 Service/Finance Strategy Area: Service Planning Snowtoad Zone: Standard Agricultural Production District: N Forest Production District: N Rural Forest Focus Area: N TDR Type: N/A TDR Status: NIA TDR Permit Number: NIA -------------------- Building Inspection Area: Keller Rockey Clearing Inspection Area: Bruce Engell Code Enforcement Inspection Area: Bill Turner ESA Inspection Area: Greg Sutton Grading Inspection Area: Bruce Engell Land Use Inspection Area: Jay Young ----------------------- Sens. Areas Notice(s) on Title: NONE Tuesday, Apr 08, 2003 11:30 AM King County - DDES -... I . . I � L . I - um ervmame�.v, WA 161 W.-M, - E7A- P. PJF. -E7ArS- B Ri AM M. —E, EWLTM gm -a 4 U v, j L-' P. v �KID E RETO A Ii Record: 1 of 2 Select Pafcel,, N umbeis Like 090 Select Multiples& Make Activity'Set F Filters. ..... .. . .. ...... �T ���@�� I zwo J, btatus: I `B etO6en:, Back Stop 7 .MI X.: m y r I! 11"d )l Pp 1 6. Tuesday, Apr 08, 2003 11:31 AM King County - DDES I , 1. ; � I..J . �J:. W Olt. ill,: at < < < < I d rip r. I Parcel Number.' 1145750-0090 IKC-11 1f 14 -Jurisdic ioni f'SitUsA, ddr6sv 113644 1 60T H AVE S E -4 l.:., P4 Postal City 'Last:,U PAA 0 w"', ne me GIL, Row� -P, 10- P W 'T' Rq� j, Il j4 Mati6h3. Cbeyeiopment Irjform6til:on>>>>> iji�o < << < M, AL j: 1/4- S ec_T vip-9 ng'. .14 - 2 3 - 0 5 e o. 'N n :4 ��,-,Plat,Name AR PARK FIVE -ACRE T R S jf, Z on .... I`' 6iflo,... ...... 1'EBlkNo'.i ,z6h6 3 ` 4.5 19G,020 I!. ZoningEffective'Date: 0 'j ij Krol'i P'g 1I Engr,M'ap.No Traffic Mit. 206e'�-, r I , Vol./Pg. f9i 5/091 rF Comprehensive Plan It'A, ;11111 lNewcastl S6h o ''Fire District 25 rk: it D ublic WaterAv'ail? - J,ger,Avail?' , % IF - 4� Vacancy Code SewevDistrict. "I Jill �Ig r F7, 7r,. IM 'I' ` lv� ft- It . JI ij, I .. Tuesday, Apr 08, 2003 11:31 AM King County - DDES BDOB KING COUNTY DEPT OF ASSESSMENTS BDO1 PAII1260-S1 REAL PROPERTY CHARACTERISTICS 04/08/03 11:31:40.4 ACCOUNT: 145750-0090-0 SITUS: 13644 160TH AV SE 98055 TAXPAYER: BOWEN VIRGIL E QSTR: SE 14 23 05 LOT: 2 BLK: 3 PLAT: CEDAR PARK FIVE -ACRE TRS JURS: KING CO * L A N D D A T A *** B U I L D I N G D A T A ** BLDG 1 OF 1 ZONE ACTUAL BLDG SQ FOOTAGE DATA MISC BLDG INFO JURISDICTION KING CO I FIRST FLOOR 1210 YEAR BUILT 1962 ACRES 4.50 I 1/2 FLOOR #STORIES 1.0 WATER SYSTEM WTR DIST I 2ND FLOOR #LIVING UNITS 1 SEWER PRIVATE I UPPER FLOOR DAYLIGHT BSMT YES VIEW NO TOTAL BSMT 1200 HEAT SOURCE OIL OPEN SPACE I FIN BSMT 1200 HEAT SYSTEM FR AIR BSMT GARAGE ACCESSORY IMPS TIDELANDS I TOTAL LIVING AREA 2410 POOL AREA WATERFRONT FEET ATTACHED GARAGE POOL CONSTR WFT LOCATION I DET GARAGE AREA 660 WFT BANK ROOMS CARPORT AREA WFT RIGHTS ONLY BEDROOMS 6 MOBILE HOME 0.3) CHOOSE ONE OPTION: PRESS <PRINT> TO PRINT SCREEN, <PF4> FOR LEGAL, <PF6> FOR HISTORY, <PF7> FOR TAXES OR <PFB> TO END. BDOB KING COUNTY DEPT OF ASSESSMENTS BDO1 PAI11280-SI REAL PROPERTY LEGAL DESCRIPTION 04/08/03 11:31:46.7 ACCOUNT: 145750-0090-0 SITUS: 13644 160TH AV SE 98055 TAXPAYER: BOWEN VIRGIL E QSTR: SE 14 23 05 JURS: KING CO LEGAL DESCRIPTION - PAGE 1 LOT 2 BLOCK 3 PLAT: CEDAR PARK FIVE -ACRE TRS CEDAR PARK FIVE -ACRE TRS * END OF LEGAL DESCRIPTION * ( 0.0? CHOOSE ONE OPTION PRESS <PRINT> TO PRINT SCREEN, <ENTER> FOR MORE LEGALS, <PF2> FOR CHARACTERISTICS, <PF6> FOR HISTORY, <PF7> FOR TAXES OR <PF8> TO END. BDOB KING COUNTY DEPT OF ASSESSMENTS BDOI PAI11270-S1 REAL PROPERTY HISTORY 04/08/03 11:32:21.5 ACCOUNT: 145750-0090-0 SITUS: 13644 160TH AV SE 98055 TAXPAYER: BOWEN VIRGIL E QSTR: SE 14 23 05 LOT: 2 BLK: 3 PLAT: CEDAR PARK FIVE -ACRE TRS JURS: KING CO * A S S E S S E D V A L U E H I S T O R Y S A L E S H I S T O R Y YEAR LAND IMPS DATE REASON I DATE SALES PRICE REMARKS 03 165,000 165,000 07/02 REVALUE 101/94 QCD 02 156,000 153,000 04/01 REVALUE O1 140,000 142,000 05/00 REVALUE 00 135,000 108,000 07/99 REVALUE 99 150,000 121,000 10/98 REVALUE 99 132,000 107,000 04/98 EXTENSION 98 132,000 107,000 09/97 REVALUE 97 132,400 90,900 09/96 REVALUE 95 132,400 90,900 08/94 REVALUE 93 72,600 115,100 04/92 REVALUE 91 60,500 95,900 08/90 REVALUE * * * CONTINUED * * * * END OF SALES HISTORY ( 0.5) CHOOSE ONE OPTION: PRESS <PRINT> TO PRINT SCREEN, <ENTER> FOR MORE HISTORY, <PF2> FOR CHARACTERISTICS, <PF4> FOR LEGAL, <PF7> FOR TAXES OR <PFB> TO END. BDOB KING COUNTY DEPT OF ASSESSMENTS BD01 PAII1270-51 REAL PROPERTY HISTORY 04/08/03 11:32:27.4 ACCOUNT: 145750-0090-0 SITUS: 13644 160TH AV SE 98055 TAXPAYER: BOWEN VIRGIL E QSTR: SE 14 23 05 LOT: 2 BLK: 3 PLAT: CEDAR PARK FIVE -ACRE TRS JURS: KING CO * A S S E S S E D V A L U E H I S T O R Y S A L E S H I S T O R Y YEAR LAND IMPS DATE REASON I DATE SALES PRICE REMARKS 89 46,400 61,900 03/88 REVALUE 101/94 QCD 87 46,800 65,900 06/86 REVALUE 85 44,100 60,800 03/84 REVALUE 83 40,500 66,800 03/82 REVALUE * END OF VALUE HISTORY * I * END OF SALES HISTORY 6.4) CHOOSE ONE OPTION: PRESS <PRINT> TO PRINT SCREEN, <PF2> FOR CHARACTERISTICS, <PF4> FOR LEGAL, <PF7> FOR TAXES OR <PF8> TO END. Dev. Cond. Query Result - DDES, King County Washington Page 1 of 1 0 King County Home 7NMs I�S,vicesCarn ns iSearCh� The Parcel Number you entered "1457500090" does not have any Development Conditions. To start over click on the New Query link below. Updated: December 29, 1998 King County I DDES Page j DDESIGIS Page I New Query_ News I Services I Comments Search Links to external sites do not constitute endorsements by King County. By visiting this and other King County web pages, you expressly agree to be bound by terms and conditions of the site. .Ths_dataila. http://appsO l.metrokc.gov/www6/ddes/new_direct.cfin 04/08/2003 Parcel Number: 1457500090 Taxpayer: BOWEN VIRGIL E Annexation: NIA Jurisdiction: Unincorporated King County Situs Address: 13644 160TH AVE SE Postal City: Renton, 98059 Plat Name: CEDAR PARK FIVE -ACRE TRS Rec: nil Lot: 2; Block: 3 Kroll Page: 811 E Thomas Bros. Page: 657 114-S-T-R: SE-14-23-5 Acres: 4.50 (196020 SgFt.) Current Zoning: R-4 Potential Zoning: Comp. Plan Land Use: um Assessor's Open Space: NIA Commercial Use: NIA Number of Units: NIA Mobile Home: N Land Value: 156000 Improvements Value: 153000 Community Plan Area: Newcastle Unincorporated Area Council: Four Creeks Unincorporated Area Council School District: Issaquah 411 Fire District: 25 Roads MPS Zone: 452 ($212$.00) Waterfront: PRIVATE Water Service: WATER DISTRICT Water Service Planning Area: King County Water District 90 Sewer Service: PRIVATE Airport Noise Remedy Program: NIA Bald Eagle Flag: N/A Council District (1996-2001): 12 David Irons Jr. (R) Council District (2002): 12 David Irons (R) Drainage Basin: Lower Cedar River, WRIA 8 Police: King County, Pct: 3, Dist: F2 Service/Finance Strategy Area: Service Planning Snowload Zone: Standard Agricultural Production District: N Forest Production District: N Rural Forest Focus Area: N TOR Type: N/A TOR Status: NIA TOR Permit Number: NIA Building Inspection Area: Keller Rockey Clearing Inspection Area: Bruce Engell Code Enforcement Inspection Area: Bill Turner ESA Inspection Area: Greg Sutton Grading Inspection Area: Bruce Engell Land Use Inspection Area: Jay Young K.C. 54 E 2 SCALE I" - IQQ, �rv,yso - f 306.74 L• 7_7 _`�,' :sue 1 37, 7:5 �a U ` o 4 r el M V. 1 N p V L O• N .+� n ry N h p J W ♦ i, V V I � c r I ' L,� Lm� 7c• �• .t. Ln rJrtH r+ aL W .::. 7701) CJ� 77ka 3 7 4 51ti' `+ l G ` T t I• ,' . ay 'ti^l'Z' J .fi a V V QGd �`� de. �� A4 yL, R�' '' ¢•y r•+r" y n ,.1 h u a I A" LM R ZK1 j a 17 LO 0 N — TWO illA>a 19 Ka Vr'! PUMS£ OF A89l67)JCO W UXA-. dV YOUR plies Am M 7111,; IZ l 15 iblt JHF ASSi.ITT'+f. Tri TUC.ITiNC, Y()URK•C- SE fb } r�`�y/ boa CY) U 8 ASS[ pa ��e :PiorE i'Y N7P I, )t4T (;vA, l.i Tl l 54 � 4-23- i T') ik'.7 At rl�fU :. A¢A: UfibLrE)IT: �9 4SOR r N� 18 2- 5 . Q r;�-s 37 �.�rcedJ87-40` II°W SCALE _" - 100' e• ,Jn Yc ,� 7n jo9.74 (36T ST Y sva �9 rr a� ��} � "6 .('B,v!o,v wv�. e _ r o+� 0 i �` M1v08 k I •sue 4 7 G,•91` i7� �� P v IL• � •f r r ■ P Y r i 1 Y V AA f r/ 1 ? fs vs Spa soq sn iS•� -tir' � • 1 Uy. N (/) d+ rfrrM O• +cw ;]B.Trr! 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K.q,MMP nW I'ro _ ar wryer, fq a urolZ r w f.f aocuary rags, tinrYm... m ., vs bw o� ace w so.—...P G4yKUWi not a ii.oN <v .Iry ate.- fpsrrl. Q, bUI L'..we.�z.. a mns.:q,rnhef pa" IIG6q. b,ll COI Inge b left r nk O/ bt pafiYp r.rw.w kan w ws a �.ulr of rr rlMrrEv. —dW"-ermop ermsp.pWMb .R.Wbraea.np—aK.9 Rol data Apr 6, 2=IX 4WdwM IWDI gislav-dsr\projec%\b- e2-epr - - - - - - - - - - - - - - 4W - - -- ----------- L. SE x f - = L03P0005/6 - LIBERTY GROVE WATER QUALITY - NO LHDA'S MAPPED j i -- — N Tarrhp Utr I_ S-T-R OSLINES -- - ---• _ �SECUNES a _ H TW PLINES ND ST wrar eaaee 132ND PL. _ _ 3 Parcels Bw so. DIN cow 9 ST K .� - - Bpaak Warr Qlaiy Regiemar" Am Bmk WO arrow monk Ara.. (TA) ' _` Serwfaw Lake TA S13b H:Si - Riporaly8igrvfa S"n,aTA --_-_ 9aab1. Wrer Quality Requrernants l�! j'•"j Bmc WO TA Sarwive Lake TA P 1lzq"L q` SE 137TH# IL N /\/ a'r B« dar+es LAtp000s w --s.138FH .pL 6' `x SE li O1.401MPN VHDAr w-PIED -- i V I'_ 0 500 1000 Fsd 1 ti 7OOa teal �iOn8 Coudy f1 -- r y 1 i urib6 m M TM dymsm M1yi trr OM would by p^Y ('.p'".raa s *roar IItO r oa to arms- Km Cod itiCaleb nrtr ro u q uw a+Ppr soft I ago nKy 106 Wh.* C % VImo,6ar Walla011, b.I gIIF WM wd� vrom�a. Kuip Can9' Mrs nol M 4�h1� ru w.y I + yw.V pcla. mar" .Ipawlle, .' wa.rwlwab.r i ' awYrp. IGALIA nd IeMo0 b, IOW 1[i[ nlael Vrofm—,Aqft. R. �MWmae�dblix111Wm OelW"mMmy AMNrdfoey QYiorlrllam ant , wrpol6X,C awrp by-Mn Vwn-*dr Cal fib Plot date: Apr 0. T003:51AdMm1Nm11pls1er_OwAaa}�tla16�2.+Pr ' 01-471D 'ribeity G;,) e Contigi cus Piel1minary Plat King County ,._ryCnecfilist Purpose of Checklist: 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 King County and / or any other agencies with jurisdiction to identify impacts from a proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help King County decide whether an EIS is required. A. BACKGROUND 1. Name of proposed project, if applicable: Liberty Grove Contiguous Subdivision 2. Name of proponent: Lakeridge Development, Inc. 3. Address and phone number of proponent and contact person: Proponent: Contact Person: 4. Date checklist prepared: February 28, 2003 Lakeridge Development, Inc. PO BOX. 146 Renton, WA 98057 (425) 228-9750 Phone Mel Daley or Hans Korve DMP Engineering 726 Auburn Way North (253) 333-2200 Phone (253) 333-2206 Fax 5. Agency requesting checklist: King County, DDES 6. Proposed timing or schedule (including phasing, if applicable): Application Submittal ............................ March 2003 Public Hearing ........................................ May 2003 Council Action.........................................tune 2003 Engineering Submittal .......................... June 2003 Site Grading .......................................... July 2003 Final Plat ................................................. December 2003 1 MAR 1 K. C. D FOR AGENCY USE ONLY 2003�VE 0 .E.S LGC a�poo o� D':-47r .aberiy °.era -re Gom� jous Fl ir~ racy P!al FOR AGENCY King County Sw?A Mnec,'rs; USE ONLY 7. Do you have any plans for future additions, expansions, or further activity related to or connected with this proposal? If yes please explain. No. 8. List any information you know about that has been prepared, or will be prepared, directly related to this proposal. The following information will be prepared and submitted under separate cover or is available in County files. • Rezone application - DDES • Level 1 Downstream Analysis • Conceptual Drainage Plan o Traffic Study, DN Traffic Consultants, February 7, 2003 • Wetland Report — Habitat Technologies, November 5, 2002 a Preliminary Recreation Plan 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by this proposal? • Applicant has submitted a rezone application with this subdivision application. a Evendell Preliminary Plat approval (LO1TY401) • Liberty Grove Preliminary Plat Approval 10. List any governmental approvals or permits that will be needed for your proposal, if known. SEPA Threshold Determination King County Re -zone Approval King County Preliminary and Final Plat Approval King County Clearing and Grading Permits King County Building Permits King County 11. Give brief, complete description of the proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. SUBDIVISION The proposed preliminary plat will subdivide two parcels, totaling 7.92 acres located on tax parcel(s) 145750 — 0085 and 145750 - 0090 into 36 single-family lots, open space, and access tracts. The property is located on the east side of 160ti' Ave. SE (145750-0085 & 0090) and contains two existing homes and associated outbuildings. The home located on parcel — 0090 is proposed to remain. The additional home and all the associated outbuildings are proposed for removal. This property is the second half of the original "Liberty Grove" project. All storm water, traffic and recreational issues have been reviewed as one project but will be presented with each individual segment. REZONE This project and its contiguous neighbor, Liberty Grove have applied for a rezone from R-4 to R-6. This proposed rezone would be consistent with the current comprehensive plan designation. This proposal will also be consistent 2 LGC 01-470 Lle, y G ro:;e r-on.'iguais Prelimirari Pn. FOR AGENCY i?Rg iGt t-.j 3Grn Ch. eCn1':5t USE ONLY with the development patterns of the surrounding area. The plat of Evendell located west of the Liberty proposal is currently being rezones from R-4 to R-0 as well. 12. Location of the proposal. Provide 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 available. 7wc Pmw-'Ca The subject proposal is situated on three parcels totaling 7.92 acres, located within the jurisdictional boundaries of unincorporated King County in the SE'/. of Section 14 Township 23 North, Range 5 East W.M. The site is located on parcel(s) 145750-0085 and -0090. Please refer to the Preliminary Plat map for the legal description, site plan, vicinity map, and topographic map. The proposed Plat of Liberty Grove is located to the north on the west side of 160P Ave. SE. B. ENVIRONMENTAL ELEMENTS 1. Earth General description of the site (circle one): flat , rollin , hilly, steep slopes, mountainous. The project site is located on the east side of 160e' Ave. SE. (-0085 & -0090) and contains a few minor slopes in the northeast comer of the property and a non jurisdictional drainage channel which extends through the center of the property, from north to south. The northeastern portion of the site is classified as forested uplands. The remainder of the property is pasture with two existing homes and out buildings. One Class 3 wetland has been identified in the south-central portion of the site. The finding and classification has been reviewed and approved by DDES staff. Please refer to the preliminary plat map for detailed contour information. b. What is the steepest slope on the site (approximate percent slope)? According to the field topographic survey, the steepest slope on the site is approximately 5% to 10% located northeast comer of the project site. c- What general types of soils are found on the site (for example, clay, sand, gravel, peat, and muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. According to the US Soil Conservation Service Soil Map, the site is primarily Alderwood series (AgC) d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. According to the Icing County Sensitive Areas Map, the property contains no hazard areas. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. 3 LGC 0',-470 E itery pro PrelinJmiry Flat FOR AGENCY King Cot;^Ey S=-�M. _ck st USE ONLY Grading of the site will be necessary to modify the site for stormwater drainage flow. The exact quantity of grading is not known at this time, however, it is anticipated that the grading activities would be designed to balance and not require import or export of soil. Grading of the individual home sites will involve the excavation of approximately 150 to 200 CY of cut and/or fill. These issues will be addressed during the building permit phase. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Some erosion could occur on -site as a result of construction activities; however, temporary erosion and sedimentation control measures to be approved by King County will be employed to reduce erosion impacts. All construction during the wet season will comply with the 1998 Surface Water Design Manual, Sections 5.4.8 and D.4.2.1A concerning site coverage techniques. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Due to the preliminary nature of the plans, the exact percentage of impervious surface associated with this project is currently unknown. The subject proposal will not exceed the maximum impervious surface area as required by KCC 21A.12.030 h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: I MQM During construction, the contractor will follow an approved temporary erosion and sedimentation control plan meeting KCC standards. Typical measures, which may be employed, include the use of silt fences, straw bales, and temporary storm drainage features. Hydro seeding exposed soils and cleared areas after construction will also reduce the potential for erosion. All construction during the wet season will comply with the 1998 Surface Water Design Manual, Sections 5.4.8 and 113.4.2.1A concerning site coverage techniques. a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, and industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction: Emissions and dust particulates generated primarily by construction equipment will be produced during the construction phase of this project. The amount of emissions to the air will be minimal and will occur during the actual construction of the development. 4 LGC �+ a>. FOR AGENCY fl.-4,,. ibe~y�;�`,2 Ccr.,igU:,us eii:;�ira'.'Niat <irg C�z:�tr �rY.; Chec list USE ONLY Long Term Air Quality: Long-term air impacts would be those typically associated with residential land uses. Sources of longterm emissions and odor could include vehicle emissions from increased vehicle use generated by the new residential units and emissions from wood burning fireplaces (if permitted). The additional vehicular emissions in these areas are not anticipated to concentrate and therefore are not anticipated to create a health hazard to the residents or surrounding areas. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. No. c. Proposed measures to reduce or control emissions or other impacts to air, if any: If particulates become suspended during construction, frequent watering of the site during the construction phase of the project would be used to help control dust and other particulates generated on the site. This will be accomplished in accord with Section 5.4.7 of the 1998 Surface Water Design Manual. 3. Water a. Surface: 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, and wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. According to the King County Sensitive Areas Folio, there are no recorded streams or other water bodies on the subject site. However, field investigation has revealed the presents of a single Class 3 wetland feature in the south-central section of the site. Habitat Technologies has completed a full wetland assessment and report. The report was reviewed and approved by DDES Staff on November 27, 2002. 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. Yes. The Class 3 Wetland, identified in the wetland report will be preserved and accorded the appropriate 25' buffers and 15' building setback. Grading and other construction activities are expected within 200' of the wetland feature but outside the required buffers. Appropriate measures will be taken to insure the integrity of the wetland feature during construction. Refer to the attached wetland report for complete details. 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. Creation of the proposed single-family lots will not require the adverse impact or placement of fill within identified wetland areas or buffers. LGC 0'-470 Libart: G ove Corriipr),os PreftM^ ,' Piat FOR AGENCY Kt^g Couity SEPA C--sG(O;st USE ONLY 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan According to the King County Sensitive Areas Maps, no portion of the site lies within the 100 foot flood plain. 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. No. b. Ground: 1) Will groundwater be withdrawn, or will water be discharged to groundwater.? Give general description, purpose, and approximate quantities if known. No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, agricultural; etc.) Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None known at this time. 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 runoff will primarily be generated from roadways, residential structures, and associated driveways. Storm water will be collected in catch basins within the roadways and/or tight -lined from residential roof tops and conveyed to a proposed detention facility located on the project site (southwest corner of-0090). Storm water from the proposed plat of "Liberty Grove" will be transferred along 160"' Ave. SE and processed in the single stormwater facility located on parcel -0090. Discharge from the proposed facility will be piped into the existing storm water system. Refer to the attached Level 1 storm water report for complete details. 2) Could waste materials enter ground or surface waters? If so, generally describe. Some pollutants normally associated with residential development could enter the surface water, however, the amount would be minimal since the 6 LGC �t--'�.7i'i ! il7Bi'_` G"O�.E U!i:'�i�:�Cii;j r2li.'�^i� . rV PI@J FOR AGENCY KiM.o Count. SEPA r; ,ec st USE ONLY on -site drainage will be conveyed to a water quality and detention facility in conformance with the 1998 Surface Water Design Manual. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: The storm water runoff will be collected and conveyed to a detention facility(s) that will be designed and constructed in conformance with the 1998 Surface Water Design Manual. 4. Plants a. Check or circle types of vegetation found on the site: deciduous tree: alder, maple, aspen, other: evergreen tree: fir, cedar, hemlock, pine, other shrubs grass pasture crop or grain wet soil plants: cattail, buttercup, bullrush, skunk cabbage water plants: water lily, eelgrass, milfoil, other: b. What kind and amount of vegetation will be removed or altered? The north portion of the project site, on the east side of 160"' Ave. SE, is currently covered with evergreen and deciduous trees with the remainder of the property in grasses and pasture land. There is some ornamental vegetation associated with the existing homes. The majority of existing vegetation will be removed during the grading process with the exception of buffer vegetation surrounding the retained wetland feature. All ornamental landscaping associated with the homes to be demolished will also be removed. See the attached wetland report for a complete list of existing vegetation. c. List threatened or endangered species known to be on or near the site. There are no known threatened or endangered plant species on or near the site. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The proposed preliminary plat anticipates retaining existing trees when possible. The new single-family residences will provide new landscaping including lawns, shrubs, and ornamental trees. Native vegetation will be utilized, where appropriate. Some additional trees and vegetation may be incorporated into the recreation area and storm water facility where appropriate. 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, other: 7 LGC i:? -470 L'berlv Gru.,e Prelirr-Ma,-Y Pia! FOR AGENCY Kng Counttf sE^.,�, Checklist USE ONLY mammals: deer, bear, elk, beaver, other: rodents, raccoons. fish: bass, perch, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. None Known. c. Is the site part of a migration route? If so, explain. No. d. Proposed measures to preserve or enhance wildlife, if any: Retain native vegetation within the sensitive areas tract associated with the retained wetland feature. In addition, installation of native landscaping throughout the plat area will provide coverage and habitat for urban tolerant wildlife. Typical landscaping is likely to include rhododendron, azalea, boxwood, magnolia, Cedar, hemlock, blue spruce, cherry, plum, maple and ash. Some additional landscaping will be installed in association with the proposed recreation facility. 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. Electrical energy will be the primary source of power serving the needs of the project and natural gas will be made available for the purpose of heating and other needs associated with residential living. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. 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: The residential buildings that will be constructed as a result of this project will meet or exceed the applicable single-family residential energy conservation I consumption requirements in King County and the Uniform Building Codes. 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. It is unlikely under normal working conditions that environmental health hazards would be encountered. All project -related construction will meet or exceed current, County, State and Federal laws. 8 LGC of --70 LiLety Grove Fla' FOR AGENCY King cc-kinUSE ONLY 1) Describe special emergency services that might be required. In the event that environmental health hazards are encountered or occur during construction, all appropriate precautionary measures will be employed. Any emergency situation would be addressed by the existing resources of Fire District #25. 2) Proposed measures to reduce or control environmental health hazards, if any: State regulations regarding safety and the handling of hazardous materials will be followed during the construction process. Equipment refueling areas would be located in areas where a spill could be quickly contained and where the risk of hazardous materials entering surface water is minimized. On -site management will be equipped with mobile communications equipment at all times to contact emergency services in the event of an incident. b. Noise 1) What types of noise exist in the area, which may affect your project (for example: traffic, equipment operation, other)? The dominant source of noise in the project vicinity is traffic along 16e Ave. SE, which bisects the proposed project. 2) What types and levels of noise would be created by or associated with the 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. Shortterm impacts would result from the use of construction equipment during site development. Construction would occur during permitted construction hours and in compliance with King County noise standards. 3) Proposed measures to reduce or control noise impacts, if any: Construction activity will be limited to permitted construction hours and construction equipment will not be allowed to idle for continuous periods of time, which will help to mitigate the impacts of potential construction noise. Hours of operation will be posted on -site. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The site(s) are currently used as single family residences. One of the existing properties contains a barn and other outbuildings associated with the keeping of live stalk. Adjacent land uses consist of a low density single- family residence. The existing plat of Liberty Lane is located to the east and the proposed plat of Evendell is located to the west. 9 LGC 011 •47C Libanv r�r4','e W-0Onhguo"s preiln-,i lai v Piat FOR AGENCYKinc =mty SIE0 PA. USE ONLY b. Has the site been used for agriculture? If so, describe. It is not believed that the site was utilized for agricultural production in the past. c. Describe any structures on the site. The property on the east side of I!Wh Ave. SE , "Liberty Grove Contiguous" (145750-0085 & -0090) contains two existing homes and associated outbuildings. The home located on parcel — 0090 is proposed to remain. The additional home on lot -0085 and all the associated outbuildings are proposed for removal. a 1,240 SF home located at13612 160TH AV SE 98055 (145760-0085) d 2,410 SF' home located at 136" 160TH AV SE 98055 (145750-0090) d. Will any structures be demolished? If so, what? Yes. One of the homes and all of the out buildings are proposed for removal. e. What is the current zoning classification of the site? The project site is currently zoned R-4. The applicant has submitted a proposal to rezone the property as R-6. f. What is the current comprehensive plan designation of the site? According to the King County Comprehensive Land Use Plan, the area is designated Urban Residential — R 4-12. This designation would support the proposed rezone of the property. g. If applicable, what is the current shoreline master program designation of the site? Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. According to the 1990 King County Sensitive Areas Folio no part of the property has been designated as sensitive. However, field investigation has identified a low value, minor Class 3 wetland feature on -site. The feature is located in the south-central segment of the project site. See attached Wetland Report. Approximately how many people would reside or work in the completed project? Assuming 2.5 persons per household, approximately 90 people would reside in the proposed project. j. Approximately how many people would the completed project displace? 2.5 k. Proposed measures to avoid or reduce displacement impacts, if any: 10 LGC 0;-470 i 1bertv G,a,.e Plat FOR AGENCY King CauMt_v svPN Chaok!lst USE ONLY The proposed project will provide 35 new housing units, 36 total. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The project will be developed in accordance with applicable King County development and land use codes to ensure the project is consistent with the goals and policies of the Comprehensive Plan and applicable development regulations in effect at the time of a complete Preliminary Subdivision application. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. Approximately 35 (36 total) new middle -income housing units will be provided. b. Approximately how many units, if any would be eliminated? Indicate whether high, middle, or tow -income housing. Two middle income homes will be removed. c. Proposed measures to reduce or control housing impacts, if any: Adherence to the comprehensive plan and growth management planning goals of King County would ensure that housing development is consistent with those policies stated in the applicable land use plan. 35 new homes will be built. 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 specific building plans are included with this project; however, it is anticipated that houses built on the site would confonn to the King County development regulations and be limited to a height of 35 feet in accordance with 21 A.12.030. b. What views in the immediate vicinity would be altered or obstructed? Development of the site would result in a change to the visual character of the site for the nearest existing residences and roadways to that of a single- family neighborhood area. No significant views would be obstructed. c. Proposed measures to reduce or control aesthetic impacts, if any: The site plan has been developed to provide a site design layout consistent with the development regulations in place for the R4 and/or R-6 zone. The proposed project incorporates landscape and open space areas in accordance with King County development regulations. 11 LGC )1-4%0 UbeT! Grc,,e !or,.'.[gwUs Freimirarv_ Flat FOR AGENCY County SSP,= ck'.ist USE ONLY 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? Light and glare from the completed project is anticipated to be that typically generated by single-family residences, mainly occurring during the evening hours, and be associated with vehicle headlights, streetlights and residential unit lighting. b. Could light or glare from the finished project be a safety hazard or interfere with views? Not under normal circumstances. c. What existing off -site sources of light or glare may affect your proposal? None. d. Proposed measures to reduce or control light and glare impacts, if any: Installation of front yard trees along the street frontages and landscaping in open space areas will help to alleviate some of the light and glare created by streetlights, headlights and residential unit lighting from the adjacent properties. The proposal will only install those street lights approved by King County and Puget Sound Energy. Typical streetlights would consist of a 150 watt, flat lens luminaire located atop a 25' light standard. 12. Recreation a. What designated and informal recreational opportunities are in the immediate vicinity? There are currently no public recreation facilities in the immediate vicinity of the site. Undeveloped King County park land. lies approximately 2000' west of the site. Maplewood Park is about 1 mile southwest of the site. Maplewood Heights park is .4 miles southeast of the site. b. Would the proposed project displace any existing recreational uses? Ifso, describe. The project would not displace any existing recreational 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 proposed project will provide a minimum of 390 square feet of open space/recreation area per single-family lot (13,650 SF) pursuant to 21A.14. The applicant proposes to construct recreational facilities on site or pay the appropriate fee4n4leu of recreational facilities to offset any potential adverse impacts of the project. Many of the required recreational facilities required for the plat of Liberty Grove are proposed to be located in conjunction with the facilities provided by the plat of Liberty Grove 12 LGC FOR AGENCY USE ONLY Contiguous. This will allow for a more unified and centralized recreational opportunity. 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 known. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. To the best of our knowledge, there are no landmarks or evidence of any significant historic, archaeological, scientific or cultural resources known to be on or next to the site. c. Proposed measures to reduce or control impacts, if any: if any such historic or cultural evidence is encountered during construction or installation of improvements, work would be halted in the area and a state -approved archaeologist/historian would be engaged to investigate, evaluate and/or move or curate such resources, as appropriate. 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. The proposed. project will take primary access from 16e Ave SE. Secondary access for the east portion of the plat will come from SE 136a' Street. Please see the attached traffic report for more details. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? No. The nearest transit stop is located near the comer of SE 128"' Street and 16e Ave SE, approximately .46 miles away from the project site. The Metro bus rout providing service to that stop is #111. There is no bus shelter provided at that location. c. How many parking spaces would the completed project have? How many would the project eliminate? None. The proposed project will provide parking in private driveways, garages and on -street parking. 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). Yes, the proposed project will require improvement of public rightof-way along 16Q Ave. SE & SE 136"' Street and construction of intemal circulatior roads and access tracts. All roads will be designed and constructed tc 13 LGC c4 Cona�_ - e m< , r ,=: t FOR AGENCY County SE P=, USE ONLY current King County standards. 160'h Ave. SE will be designed to the Urban Collector standard. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. Assuming 10 trips per household per day, the completed project will generate approximately 360 vehicular trips per day. Please refer to the attached Traffic Report for specific details. g. Proposed measures to reduce or control transportation impacts, if any: The applicant or subsequent owner(s) will comply with Title 14 of the King County Code, which contains provisions for payment of MPS (Mitigation Payment System) Fees. Applicant will either pay the MPS fee at the time of final plat application or at the time of building permit application. If the first option is chosen, the fee paid will be the fee in effect at the time of plat application, and a note will be placed on the face of the plat stating, "All Mitigation Payment System Fees required by Title 14 have been paid." If the second option is chosen, the MPS fee paid will be the fee in effect at the time of building permit application. Contributions to projects listed in the NIPS program may receive credit towards the MPS payment due. The estimated MPS fee for this project at the time of application will be, based on a 35 NEW (36 total) unit subdivision. The project lies within MPS zone # 452, which has a fee of $2,139 per new single-family unit. Based on 35 new units, the projected total MPS fee is $74,865. 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 completed project would result in an increased need for police and fire protection as well as emergency medical service. Additional recreational and school facilities will also be required to address the increase in demand for recreational opportunities. b. Proposed measures to reduce or control direct impacts on public services, if any. The project will be designed and constructed with adequate water pressure, properly located fire hydrants and roadways constructed to allow adequate access for fire, medic and police protection vehicles. increased property valuation will result in increased taxes generated to support public services. The proponent will. pay necessary school and traffic mitigation fees to offset the potential impacts to the school and transportation system. The project is located in the Issaquah School District #411. The current school impact 14 LGC FOR AGENCY USE ONLY fee is $3,924 per single-family unit. Assuming 35 new units (36 total), the total school impact fee would be $137,340. Recreational facilities will be constructed on site in accordance with the requirements of 21A.14 to offset the potential impacts on the existing recreational system or a fee4n4ieu of those facilities will be offered. 16. Utilities a. Indicate utilities currently available at the site: Electricity, Natural Gas, Water, Telephone, Sanity Sewer, Septic System, Refuse Service, Other. 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. Water System — Sanitary Sewer System — Storm Water — Electricity: Natural Gas: Telephone: Refuse Service: Cable TV: Water District #90 City of Renton — Extension of a 12"sewer main in SE 136°i St, 10" sewer main in 1620d St. SE., and a 8"sewer main in 158d' & 160"' Ave. SE. King County Puget Sound Energy Puget Sound Energy Owest Robanco AT&T Broadband All underground service will be constructed in conjunction with road and storm drainage construction activities C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Hans A. Korve DIVIP., INC Planning Manager Date Prepared: February 28, 2003 15 LGC pl-470 _ aerty Srcve Cen?iva:cus P e im nary a,az FOR AGENCY USE ONLY DO NOT USE THIS SHEET FOR PROJECT ACTIONS Rezone Request from R-4 to R-6 Parcel(s) # 14570-0085, -0090 and 366450-0141 D. SUPPLEMENTAL SHEET FOR NONPROJECT 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; emission to air; production, storage, or release of toxic or hazardous substances; or production of noise? This proposal is to rezone 12.76 acres of R-4 land into R-6. The approved rezone would result in a minimal increase in the amount of water or air discharge from the project. The current comprehensive plan designation is for urban residential development at densities ranging from R-4 to R- 12. Achieved density is increasing from the current 4 unitslacre to the proposed 4.7 unitslacre. This proposed rezone would be consistent with that designation. Proposed measures to avoid or reduce such increases are: All development will be in accord with the adopted King County Development standards. Stormwater collection and discharge will be in accord with the 1998 Surface Water Design Manual. 2. How would the proposal be likely to affect plants, animals, fish, or marine life? The proposed rezone will have no new significant impact on the existing plant or animal populations. With or without the proposed rezone, the subject property will be developed to its highest and best use. All sensitive areas will maintain the same level of integrity with or without the approval of the proposed rezone. Proposed measures to protect or conserve plants, animals, fish, or marine life? All sensitive areas will be protected in accord with the provisions of 21A.24.320. All retained sensitive areas will be provided appropriate buffers. All storm water will be detained and treated in accord with the 16 LGC w 0;-470 , ;^ uve Con tm—n s �r ,r.,,�ar; Fiat FOR AGENCY King COL"In!v EPA whack) s; USE ONLY 1998 King County Surface water Design Manual and will not adversely effect the retained sensitive areas. Wetlands will only be altered in accord with KCC 21A.24.330. 3. How would the proposal be likely to deplete energy or natural resources? Electrical energy will be the primary source of power serving the needs of the project and natural gas will be made available for the purpose of heating and other needs associated with residential living. Electricity can be generated from renewable power sources such as hydro power. Proposed measures to protect or conserve energy and natural resources are: The proposed residential buildings for this project will meet or exceed the applicable single-family residential energy conservation/ consumption requirements in King County and the Uniform Building Codes. 4. How would the proposal be likely to use or affect environmentally sensitive areas or areas designated (or eligible or under study) for governmental protection; such as parks, wildemess, wild and scenic rivers, threatened or endangered species habitat, historic or cultural sites, wetlands, floodplains, or prime farmlands? Therefore, there will be no increased impact to sensitive areas as a result of this rezone application. The sensitive areas on site will be protected under the provisions of KCC 21A. regardless of zoning classification. Any modification to the existing sensitive areas will be in accord with 21 A.24.330. Proposed measures to protect such resources or to avoid or reduce impacts are: All development will be in accord with 21A.24.320 and provided the appropriate buffers and setbacks. Additional buffer planting may be provided if required. 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? None The proposed rezone is consistent with the current Comprehensive Plan. Proposed measures to avoid or reduce shoreline and land use impacts are: None 17 LGC 01-470 FOR AGENCY USE ONLY 6. How would the proposal be likely to increase demands on transportation or public services and utilities? The proposed development will have the effect of locally increased traffic and population which will increase the demand on existing services from the currently allowed 51 single-family residences to the proposed 60. Proposed measures to reduce or respond to such demand(s) are: Neighborhood tax revenues, taken together with Traffic and School related mitigation fees, will provide funds to continue the municipal services offered to the existing neighborhood and surrounding area. Development of the Liberty Grove project will also require improving existing unimproved or marginally improved King County right-of-way adjacent to the subject property. Primary access to both segments of the subject property will come from 160th Ave. SE. Secondary access to the eastern portion of the subject property will come from SE 136th Street. Frontage improvements contemplated for this project include: Construct half -street urban neighborhood collector road improvements along the project frontage on SE 136th Street. The existing KC right-of-way along the northern frontage is 301. Construct half -street urban neighborhood collector road improvements along the project frontage on 160m Ave. SE. The existing KC right-of-way along the east and west frontage is 30' on either side. Applicant proposes to participate in the construction of the nearby Evendell sewer lift station. Completion of this facility will allow access to approximately 37 acres of land currently serviced by on -site septic systems, some of which are currently failing. In addition, several hundred acres to the north will be able to connect via gravity sewer mains to the gravity portion of the sewer system to be constructed by the Subject Plat and the Plat of Evendell as part of the SE 136th Street improvements. The proposed subdivision will also bring with it on -site recreational facilities which are currently unavailable to the immediate surrounding properties. 18 LGC r 01-470 LiCe7v "M-Ve FOR AGENCY USE ONLY r i:' coi:'ty .. chec'kliw 7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or requirements for the protection of the environment. None The Zoning Map amendment requested is needed to attain the residential density goals prescribed for the area in question, as currently designated within the King County Comprehensive Plan Map. Urban residential R- 4 to 12 The re -designation of the subject property from R-4 to R-6 on the Zoning map will enable the property in question and the surrounding properties to be built out more in keeping with their maximum potential on land that is well suited for this level of density. • The proposed rezone is consistent with the current Comprehensive plan. • The proposed rezone and subsequent development will be consistent with development in the vicinity. a The proposed rezone will have no additional unmitigated impact on the transportation system beyond what would be allowed under current density limits. o The proposed rezone will not have an adverse affect on the general health, safety or welfare of the citizens of King County 19 LGC King County Department of Development and Environmental Services 900 Onke_+dale Avenue Southwest Kenton, %MA 980S.ri-1219 November 27, 2002 Mr. Wayne Jones. Lakeridge Development, Inc. P. O. Box 146 Renton, WA 98057 RE: Liberty Plat, A02P0151 Wetland Determination NECEIVEb DEC 0 2 2002 ArK'� 1 Dear M r. on l revi ed the Wetland Evaluation and Delineation Report and Wildlife Habitat Evaluation for the "Liberty Ridge" property, prepared by Habitat Technologies, Inc., dated November 5, 2002. 1 met Mark Heckert of Habitat Technologies at the site on November 25,.2002 and walked the property and surrounding areas_ I also reviewed aerial photos in the County files, from 1936, 1970, 1985, 1990, 1996 and 2000. 1 conferred with several of my colleagues on interpretation of the Sensitive Areas Code in relation to this property. The site consists of two properties, separated by 160t�' Avenue SE. Parcel A (3664500141) has apparently been filled many years ago (prior to 1985) with ditches installed around the west, south and east sides. The property is maintained as lawns and landscaping with a residence and shop. There are neither wetlands nor streams on this parcel. Parcel B is two tax parcels (1457500085 and 1457500090). The northeastern portion of this site is forested upland_ The remainder'of the property is pasture with a few structures and outbuildings. A central drainage through the site was ditched across the property following, recent construction of three residences to the northwest. This conveyance has some wetland characteristics through the logged area, then is ditches across the pasture. An eastern drainage outlets from a culvert under SE 136t' Street, conveying stormwater runoff from the roads, lawns and roofs of a pre-1970's subdivision to the north. This drainage has some wetland characteristics through the forested area, then is ditched ` through the pasture. These drainages are excavated through upland soils, and are neither used by salmonids nor convey a stream that was naturally occurring prior to construction. Therefore, they are neither jurisdictional wetlands nor streams. _ D MAR 112003 D L�dPDeo � TO: Mr. Wayne Jones RE: Liberty Plat, A02P0151 November 27, 2002 Page 2 However, the wetland on the south-central portion of the site appears to have been present since at least the mid-1980s. The eastern ditch is evident in the .1970 aerial photo, conveying water from the culvert under SE 136g' Street since that time. Thus, the source of hydrology to the wetland from the culvert is the "normal circumstance" for that wetland. This wetland on the south-central portion of Parcel B meets the criteria for a Class 3 rating. The wetland and a minimum 25-foot buffer must be protected through the subdivision process by placement in a Sensitive Areas Tract. The wetland buffer width could be averaged, as allowed in Code and Administrative Rule, with enhancement of the wetiand and buffer provided as compensatory mitigation. The wetland's hydrology must be protected through the subdivision process. This could occur by conveying the flows from the culvert underneath SE 1360' Street across the site, either in pipes or aboveground, and outletting into the wetland through a dispersal system. Alternatively, equivalent hydrology could be calculated and possibly provided from roof drainage from surrounding structures_ The stormwater runoff from the three new residences to the northwest is not required to be conveyed to the wetland as this is a recent new input to the wetland. The wildlife habitat survey may need an addendum prepared during early spring, to determine whether any of the nests observed on -site are used by species that require protection under the King County Comprehensive Plan. This property is within the Urban -designated portion. of the County, so the few species that require protection include state and federal endangered,, threatened or sensitive species, and certain raptors and herons. Please let me know if you have any questions or would like to discuss this further, I can be reached at (206) 296-7291 or-laura.case metrokc. ov. Since ly, t_au a C. Casey 'Environmental Scientist — Ecologist Critical Areas Section Cc: Mark Heckert, Habitat Technologies, Inc. ` Steve Bottheim, Supervising Engineer, Critical Areas Section nABU'TA7 'TEccMN®LOGOES MA E 1 [ f1. 1111MV, 3 oaf 21, LAKERIDGE PROJECT SITE King County, Washington Part of Section 14, Township 23 North, Range 5 East, W.M. prepared. for Lakeridge Development Inc. P.O. Box 146 Renton, Washington 98057-0148 prepared by HABITAT TECHNOLOGIES P.O. Box 1088 Puyallup, Washington 98371-1088 253-M-5119 November 5, 2002 wetlands, streams, fisheries, wildlife — mitigation and permitting solutions P.O. Box 1088, Puyallup, Washington 98371 voice 253-845-5119 fax 253-841-1942 EXECUTIVE SUMMARY The Lakeridge Project Site is approximately 12.7 acres in total size and located to the east of the City of Renton, MGng County, Washington. The project site is comprised of three parcels; two contiguous parcels (Parcel B # 1457500085 and 1457500090) of 7.9 acres and an adjacent parcel ( Parcel A # 3664500141) of 4.8 acres, kitty -comer to the northwest. The Parcel A portion of the project site is dominated by a well managed and maintained lawn. A single-family dwelling with a detached shop is located in the eastern portion of Parcel A. The parcel B portion of the project site is dominated by a livestock pasture in the south with a single-family residence and bam in the west, and a forested area in the north, the western portion of which has been Geared within -the last ten years. Onsite assessment of the project site following the procedures outlined in the Washington State Wetlands Identification and Delineation Manual (Wash. Manual) and the Corps of -Engineers -Wetlands -Delineation Manual (1987 Manua!) resulted in the identification of one area that exhibited hydric soils, wetland hydrology, and hydrophytic vegetation consistent with the established criteria of both the Wash. and 1987 Manuals. This area had been impacted by prior grazing and pasture management activities, and active and on -going lawn and pasture management. This assessment, -completed in accordance with King County regulations, -included an evaluation of the function and value rating for the identified wetland, a classification of the wetland following the U.S. Fish and Wildlife methods, and an identification of the standard King County buffer width required for this wetland. Onsite,assessment also included an evaluation of the wildlife habitat availability and utilization. Species presence and habitat utilization were evaluated following the methods identified by Horner and Raedeke (1989) and within U.S. Fish and Wildlife Service Publication 80/58 (Mikoi, 1980). In addition, the King County Wildlife Study Guidelines (Draft Wildlife Management in lGng County, Issue Paper, 1993) were followed to assure consistency with the King County permit process and documentation of habitat types. WETLAND 51ZE ONSITE CLASSIFICATION KING COUNTY FUNCTION STANDARD (square fleet) (USFWS) RATING AND VALUE BUFFER RATING WIDTH C 1 9067 PEME 3 low 25 feet PEME palushine, emergent, seasonally flooded The "habitat type" best represented within the site would be that of "Agricultural Lands.' This habitat type included two freshwater wetlands. PRIMARY HABITAT TYPES INCLUDED MINOR HABITAT TYPES - Agricultural Lands - Residential Wet meadow Mixed Upland Forest -low understory The U.S. Army Corps of Engineers and King County, as well as a number of other local, state, and federal agencies, regulate activities in and around identified wetland and drainage corridor areas. Such regulations focus on the avoidance of adverse impacts to wetlands, streams, associated buffers and the mitigation of such impacts that cannot be avoided. King County has established criteria to categorize wetlands for purposes of regulation and the establishment of buffers. In addition, Kng County allows a limited amount of alterations to wetlands (i.e. isolated wetlands, roadway crossings) provided such impacts are mitigated pursuant to an approved mitigation plan_ The Selected Action Plan of the Lakeridge project site focuses on the creation of independent lots suitable for the development of single-family homesites consistent with the King County Comprehensive Plan. TABLE OF CONTENTS INTRODUCTION.................................................................................................................... 1 STUDYPURPOSE................................................................................................................ 1 SITEDESCRIPTION ............................................................... .............................................. 1 BACKGROUND INFORMATION .... ...................................... .............................................. - 2 NATIONAL WETLAND INVENTORY MAPPING............................................................. 2 STATE OF WASHINGTON PRIORITY HABITATS AND SPECIES .................................. 2 STATE OF WASHINGTON STREAM CATALOG.............................................................. 2 KING COUNTY SENSITIVE AREAS MAPPING................................................................ 2 SOILSMAPPING.............................................................................................:.................... 2 AERIAL PHOTO ANALYSIS............................................................................................... 3 ONSITE EVALUATION - WETLANDS................................................................................ 3 WETLANDSTUDY METHODS...................................................................I...._...........--_... 3 FIELDOBSERVATION .................................................. ....................................... ............... 4 ovegetation ........................... ....................................................................................... 4 v Soils ........... ......... .................................. ..-................. ..._ o Hydrology ................... WETLAND AND STREAM DETERNUNATION.................................................................. 6 WETLAND FUNCTION AND VALUE ASSESSMENT........................................................ 7 ONSITE WETLAND VALUATION...................................................................................... 9 ONSITE EVALUATION - WILDLIFE..................................................................................10 WILDLIFE STUDY METHODS ....................................... ............................... ..._10 ONSITE HABITAT TYPES ...... ............................. .................................... ......... .............. ...10 PLANT AND ANEV[AL SPECIES OBSERVATIONS .......................... :................................ 11 MOVEMENT CORRIDORS.................................................................... 12 ............................ PRIORITYSPECIES ................................... ......................................................................... 13 STATE CANDIDATE SPECIES ...................................................... .I3 .......................... ........ REGULATORY CONSIDERATION....................................................................................13 U.S. ARMY CORPS OF ENGINEERS - SECTION 404..........................................................13 STATE OF WASH NGTON DEPARTMENT OF ECOLOGY.............................................14 KING COUNTY - "ETTiVikom i MA!' .LY SENSITIVE AREAS" ORDINANCE 21A.24 ................14 a Wetland and Stream Classes.....................................................................................14 c Required Bu..hers.......----•....:...........................I....---• ........15 SELECTED ACTION PLAN...................................................................................................16 FIGURES.................................................................................................................................17 REFERENCELIST................................................................................................................18 APPENDIXA..................................................................................................................._.....19 STANDARD OF CARE Prior to extensive site planning, this document should be reviewed and the wetland boundaries verified by the appropriate resource and permitting agencies. Wetland boundaries, wetland classifications, wetland ratings, and all proposed wetland restoration and enhancement activities should be reviewed and approved by King County and potentially other regulatory staff_ The above consultants have provided professional services that are in accordance with the degree of care and skill generally accepted in the nature of the work accomplished. No other warranties are expressed or implied. The consultant is not responsible for design costs incurred before this document is approved by the appropriate resource and permitting agencies. Mark Heckert Wetland Ecologist INTRODUCTION This report details the Culmination of activities and onsite evaluations undertaken to complete both a wetlands evaluation and a wildlife habitats assessment as an element of the planning and site development of the Lakeridge Project Site. The project area is approximately 12.7 acres in total size and generally located within a quickly urbanizing area east of the City of Renton, ,King County, Washington (Figure 1). The evaluation and delineation of onsite and adjacent wetlands, drainage corridors, and wildlife habitats is a vital element in the planning and selection of a site development action. The goal of this approach is to .assure that planned site platting does not result in adverse environmental impacts to such areas. Wetlands are generally defined as "those areas of King County that are inundated or saturated by ground or surface water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life In saturated soil conditions:' (King County Environmentally Sensitive Areas). STUDY PURPOSE This purpose of this document is to present the results of the onsite assessment and evaluation of the wetland/drainage corridor areas and the wildlife habitats within the project area_ Included within this report is an assessment of the proposed impacts and compensatory actions to be taken_ to ensure that proposed onsite actions do not adversely impact environmentally sensitive areas. This -study was designed to accommodate site planning and potential regulatory actions. This report is suitable for submittal to federal, state, and local authorities for wetland boundary verification and permitting actions. SITE DESCRIPTION The project site is comprised of three parcels; two contiguous parcels ( Parcel B # 1457500085 and 1457500090) of 7.9 acres and an adjacent parcel ( Parcel A # 3664500141) of 4.8 acres kitty -comer to the northwest. The Parcel A portion of the project site is dominated by a well managed and maintained lawn. A single-family dwelling with a detached shop is located in the eastern portion of Parcel A. The parcel B portion of the project site is dominated by a livestock pasture in the south with a single-family residence and bam in the west, and a forested area in the north, the western portion of which has been cleared within the last ten years. The forested portion of parcel B is dominated. by a mixed forested plant community of mature Douglas fir (Pseudotsuga menziesit) and mature big leaf maple (Ater macrophyllum). The project site is generally flat and rolling and two narrow drainage corridor areas are present generally through the center of the Parcel B portion of the site. The eastern narrow drainage corridor is a ditch, created in upland, to convey surface water from the 02154 Lakeridge - 1 WetiandWildlife Report residential developments to the north. This ditch conveys surface water through the site north -to -south, into the common ditch in the south, then offsite into a culvert at the property boundary. The western narrow drainage corridor is a ditch which was apparently created, within an upland area, in the course of developing the residential sites to the north, and flows south through the center of the B parcel, joining with the eastern ditch, then flowing offsite to the south into a culvert. . There is no evidence onsite of a continuous stream channel other than the ditches. BACKGROUND INFORMATION NATIONAL WETLAND INVENTORY MAPPING The national Wetland Inventory (1W I) mapping completed by the U.S. Fish and Wiidlife Service was reviewed as a part of this assessment. This mapping resource did not identify any wetlands or drainage corridors on the project site. (Figure 2). 5 iT E N o 'r O N STATE OF WASHINGTON PRIORITY HABITATS AND SPECIES M sCJ The State of Washington Priority Habitats and Species (PHS) Mapping was reviewed as a part of this assessment. This mapping resource did not identify any Priority Habitats or Species onsite or within the immediate vicinity(Figure 3).. �r STATE OF WASHINGTON STREAM CATALOG The State of Washington Stream Catalog for Puget Sound was reviewed as a part of .this assessment. This mapping resource did not identify any streams within the project site. This mapping did identify the Cedar River to the south of the project site. The Cedar River was identified to provide habitat for a number of anadromous and resident salmonid fish species. KING COUNTY SENSITIVE AREAS MAPPING The King County Sensitive Areas Mapping was reviewed as a part of this. assessment. This mapping resource did not identify any wetland areas or streams within or adjacent to the project site. (Figure 4). F y SOILS MAPPING A review of the mapping of soil types within the project area completed by the U.S. Soils Conservation Service (SCS) identified that the onsite soils consist primarily of Alderwood gravelly sandy loam (Soils Survey of King County Area Washington, Nov. 1 973) (Figure 5). This soil is described as: 02154 Lakeridge - 2 WetiandWidlife Report A+aC - Alderwood gravelly sandy loam: This series consists of moderately well drained soils that have a weakly consolidated to strongly consolidated substratum at a depth of 24 to 40 inches. This soil is on uplands and formed in glacial deposits. A typical pedon of Alderwood soils from 0 -12 inches is dark brown (10YR 413) gravelly sandy loam. From 12 to 27 inches the soil is grayish -brown (2.5YR 512) gravelly sandy loam with many medium, distinct mottles. This soil series is not listed as a hydric soil. AERIAL PHOTO ANALYSIS Recent aerial photos of the project site were used within the background data collection process. These aerial photos identified that a livestock pasture community and single- family houses dominated the majority of the project site. A mixed forest community was identified to pass generally within a narrow corridor through the eastem portion of the parcel B site. The project site was within an area of large -lot single-family homesites and a number of internal roadways were present through the site. ONSITE EVALUATION - WETLANDS WETLAND STUDY METHODS Presently accepted wetland identification is based on a three parameter criteria test as established within both the Corps of Engineers Wetlands 'Delineation Manual (1987 Manual) and the Washington State Wetlands Identification and Delineation Manual (Wash. Manual)_ These criteria are: 1. A predominance of hydrophytic vegetation. 7- The presence of hydric soils, and 3. The presence of wetland hydrology. Initial onsite assessment and evaluation was completed during several site visits in September 2002. Specific identification of wetland boundaries was completed on September 10, 2002. Assessment transects were established on a north/south pattern through the project area. Wetland assessment within the project site followed the methods and procedures outlined in both the Wash. Manual and the 1987 Manual. Onsite assessment noted that there were no differences in the identified wetland boundaries as a result to using either the Wash_ Manual or the 1987 Manual. Drainage corridors were assessed and identified in accordance with the criteria established by King County and the State of Washington Department of Natural Resources (WDNR) Forest Practice Rules (WAC 222-1E-030). The boundary between wetland and non wetland areas was established by examining the transitional gradient between wetland criteria along transects through the site. 02154 lakeridge - 3 WetlandMildlife Report Delineation was performed using the routine methodology for areas greater than five acres as detailed in the 1987 Manuai. Field data sheets are provided in Appendix A. Identified boundaries were marked in the Meld with number flagging. These boundaries were then surveyed and made a part of the site plan mapping_ FIELD OBSERVATION !Vegetation A mature managed pasturellawn plant community dominated approximately two-thirds of the project site. This plant community was composed of a wide variety of invasive and seeded grasses. This plant community included colonial bentgrass (Agrostis tennis), meadow foxtail (Alopecurus pratensis), velvet grass (Holcus lanatus), reed canarygrass (Phalads arundinacea), bluegrass (Poa spp.), fescue (Festuca spp.), orchardgrass (Dactylis 'glomerata), quackgrass (Agropyron repens), bracken fern (Pteridium aquilium), western yarrow (Achillea lanulosa), thistle, cats -ear (Hypochaeris spp), softrush (Juncos effusus), tansy (Tanacetum vulgare), - dandelion (Taraxacum officinale), buttercup (Ranunculus repens), curled dock (Rumex crispus) and clover (Trifolium spp.). This plant community was identified as non-hydric (i.e. typical of uplands) in character. In the northeastern portion of parcel B, the dominant onsite species was Douglas fir and big leaf maple. These mature trees formed open stands across the treed portion of the site. 'Additional tree species occurring onsite included Western red cedar (Thuja plicata), Western hemlock (Tsuga heterophylla), red alder (Alnus rubra), black cottonwood (Populus h chocarpa), cherry (Prunus spp), and cascara (Rhamnus purshiana). The understory included a wide variety of _shrubs and herb species in vine maple (Aker circinatum), salal (Gaultheria shallon), Oregon grape (Serberis spp.), hazelnut . (Corylus cornuta), salmonbery (Rubus spectabdis), Scot's broom (Cytisus scoparius), Himalayan blackberry (Rubus procera), evergreen blackberry (Rubus laciniatus); Pacific red elderberry (Sambusus racemosa), snowberry (Symphoricarpus albus), bracken fem (Pteridium aquilium), and sword fern (Polystichum munitum). Throughout the project site this plant community had been altered by prior forest harvest actions. This plant community was identified as non-hydrophytic (i_e. typical of non -wetlands). Parcel A was comprised of a single family house with a shop with the remainder of the property well maintained and intensively managed as a lawn. The plant community within the central drainage corridor of parcel B that was identified to generally pass from north to south through the site was dominated by a young, mixed deciduous forest and emergent plant community. This plant community had also been altered by prior forest harvest and grading actions which had removed the mature trees, created slash piles, and created an internal ditch across this drainage. Observed tree species included sapling red alder, black cottonwood, and Pacific willow (Salix 02154 Lakeridge - 4 WetiandlWridlife Report lasiandra). The understory. was dense and included salmonberry, Douglas spiraea (Spiraea douglasii), Western crabapple (Pyrus fusca), Sitka willow (Salix sitchensfs), slough sedge (Carex obnupta),horsetail (equisetum arvensfs), buttercup (Ranunculus repens), reed canarygrass (Phalaris arundinacea), softrush (Juncus elfusus), and lady fem (Athyrium filix-femina). This plant association was identified as hydrophytic in character (i.e. typical of wetlands). The plant community within the south-central portion of parcel B (Wetland C) was dominated by an emergent plant community comprised of reed canarygrass. This plant community had been altered by on -going grazing and pasture management activities_ This plant association was identified -as hydrophytic in character (i.e. typical of wetlands). O Soils As identified by numerous sample plots throughout the project site, the majority of the site exhibited a soil profile typical of the Alderwood soil series. The soil was defined as gravelly sandy loam with a soil matrix color of dark brown ('IOYR 313) to brown (10YR 414). These soils did not exhibit redoximorphic features such as prominent soil mottles, oxidized root channels, or glayed soil, layers within the first 20 inches of soil depth. The majority .of the project site exhibited soil which would_ not be considered "hydric.° Representative sample plots are identified on Figure 4. (Special note - many more sample plots were completed during the field assessment than are shown within Figure 4 or reported within Appendix A). Sample plots within the defined drainage corridor that was identified to generally pass from north to south through the central portion of parcel B exhibited a mixed gravelly loam soil texture. These soils appeared to be mineral in .character. Soils ranged in color from very dark brown (1 OYR 311) to dark grayish brown (1 OYR 412). Redoximorphic features were present and often very prominent. Soils within these areas exhibited °hydric° characteristics. Sample plots within the depression at the southem portion of parcel B exhibited a mixed gravelly loam soil texture. These soils appeared to be mineral in character. Soils ranged in color from very dark brown (10YR 311) to dark grayish brown (10YR 412). Redoximorphic features were present and often very prominent Soils within these areas exhibited "hydric" characteristics. C Hydrology Onsite hydrology appeared to be the result of seasonal stormwater runoff from onsite and adjacent properties. In addition, the pattern of surface water movement appeared to have been modified by prior land use activities. These activities have included the development of offsite homesites, the development of roadways and utilities, and the placement of culverts. 02154 i.,akeridge - 5 WetiandWildtife Report The general movement of surface water runoff across parcel A of the site was generally to the south. Surface water through parcel A was captured in boundary and roadside ditches which occurred at the west, south, and east boundaries of the site. Based on field indicators (i.e. water stained leaves, drift lines, surface water, soil saturation, oxidized root channels, wetland drainage pattern) no portion of parcel A met the wetland hydrology criteria of the 1987 Manual and the Wash_ Manual. Within an area located in the north -central. portion of parcel B, directly south of the new development to the north, evidence of the passage of water was documented. This area was in a small, linear depression, and had been created and impacted by prior land use actions (i.e. compaction, creation of drainage corridor). This corridor was apparently created, through upland soils, during the development of the houses to the north to facilitate the drainage of water collected by the homesites. Based on field indicators (i.e. water stained leaves, drift lines, soil saturation, oxidized root channels, wetland drainage pattern) this linear feature met the wetland hydrology criteria of the 1987 Manual and the Wash. Manual. However, this drainage appeared to be created within an upland area, as evidenced by the soils, and was assuming hydric characteristics as a result of the direction of roof and street runoff through the site. In the northeast portion of parcel B, a storm drain culvert outletted on to the site. This storm drain apparently collected stormwater runoff from the development to the north as well as street runoff. This runoff was directed through a ditch, created in upland, south through the site, joining with the central ditch in the southern portion of the site. Based on field indicators (i.e. water stained leaves, drift lines, surface water, soil saturation, oxidized root channels, wetland drainage pattern) this drainage corridor did not meet the wetland hydrology criteria of the 1987 Manual and the Wash. Manual. Within an area located in the south-central portion of parcel B,-evidence of seasonal soil saturation was also documented. This area was in a small depression, and had been impacted by prior land use actions (i.e. grazing, compaction, pasture management). This area received the combined runoff from the two ditches to the north. Based on field indicators (i.e. water stained leaves, drift lines, soil saturation, oxidized root channels, wetland drainage pattern) this depression met the wetland hydrology criteria of the 1987 Manual and the Wash. Manual. WETLAND AND STREAM DETERMINATION Wetland determination was based on sample plots which contained hydrophytic vegetation, hydric soils, and wetland hydrology in accordance with the 1987 Manual and the Wash. Manual. Based on these methods one wetland area was identified onsite (Figure 4). No area was identified onsite to exhibit characters typical of a "stream" (i.e. a continuous pattern of surface water movement, either permanent or intermittent). 02154 Lakeridge - 6 WetlandWidlife Report However, two areas, noted to have been intentionally created in upland areas, directed runoff through the site in parcel B. WETLAND SIZE 6_N_5rf CLASSIFICATION I�ING COUNTY FUNCTION STANDARD (square feet) (USFWS) RATING AND VALUE BUFFER RATING VADTH C 9,167 PEME 3 low 25 feet PEME palustrine, emergent, seasonally flooded Wetland C: This wetland was identified within the lower portions of a topographic drainage that passed generally from the central northern boundary to the south boundary of the project site. This wetland was dominated by an emergent plant community comprised entirely of reed canarygrass. This plant community was very dense. This wetland exhibited shallow ponded surface water during the winter and early growing season as a result of topography and the direction of the surface water by the ditches into the area. Soil saturation to the surface was noted to occur within a majority of this wetland complex into the early part of the growing season. This wetland plant community ended adjacent to a culvert inlet at the southern boundary of parcel B. Wetland C was identified to meet the U.S. Fish and Wildlife Service (USFWS) criteria for classification as palustrine, emergent, seasonally. flooded/saturated (PEME). Based on the size of the wetland and the emergent plant.community this wetland complex was identified to meet the criteria for designation a King County Class 3 Wetland. As such, King county mandated the protection of this wetland with a 25-foot buffer as measured perpendicular to the wetland edge. Ditches: Two ditches transect parcel B of the project site, north to south, approximately through the - site, originating at SE 131P Street, proceeding south to the southern boundary of the site, then exiting via a culvert under the property adjacent to the south at the southern site boundary. These ditches apparently convey surface water from offsite through the site. Because. these features are entirely artificial watercourses, intentionally created in upland, these ditches apparently do not meet the regulatory criteria for designation as a King County "stream". WETLAND FUNCTION AND VALUE ASSESSMENT Wetlands are known to perform significant roles in the ecosystem, some of which are of immediate value to society. These roles vary greatly with the size, type, hydrology, vegetation, and location of wetland areas. Although the ecological functions performed by this wetland are complex, interrelated, and difficult to assess and quantify, methods have been developed for the U.S. Army Corps of Engineers (Adamus et al_ 1987: Reppert et al. 1979). The functions provided by wetlands include hydrologic support, shoreline protection, - stormwater and floodwater storage, water quality, groundwater recharge, and provision of wildlife habitat. 02154 t_akeridge - 7 WeUandWildlife Report The HYDROLOGIC SUPPORT FUNCTION is defined by the measure of hydrologic stability and environmental integrity which the wetland provides. This function is measured by the frequency of inundation and saturation by tidal actions, stream flow, runoff, and precipitation. Wetlands permanently inundated or saturated, or intertidal wetlands are valued as high. Medium valued wetlands are seasonally flooded or are open water systems that remain saturated during most of the growing season. Wetlands that are intermittently flooded or hydrologically isolated are considered of low value. The SHORELINE PROTECTION FUNCTION is defined by the measure of shielding from wave action, erosion, or storm damage which a wetland provides. This function is measured by the location and width of the wetland along shoreline areas, types of vegetation present, and the extent of development along the shoreline. A high value is given to wetlands along a shoreline that have a width greater than 200 yards and dense woody vegetation. A medium value is given to a wetland with a width of 100 to 200 yards, sparse woody vegetation, and dense emergent vegetation. Wetlands less than 100 yards in width and emergent or lacking vegetation are considered of low value. The STORMWATER AND FLOODWATER STORAGE FUNCTION is defined by the ability of a wetland to store water and retard flow during periods of flood or storm discharge. Wetlands of larger size are generally considered to have greater ability to provide this function. In addition,. wetlands nearer to urban or potentially develop -able areas are also considered to provide greater flood protections than wetlands which are in undeveloped areas. The WATER QUALITY FUNCTION is defined by the physical, biological, and chemical processes which wetlands provide to naturally purify water. This function removes organic and mineral particulates through natural filtration. In general, wetlands of greater size, more dense vegetation, and those which are close to point sources of pollution are considered to be of higher value. Wetlands which are small (<5 acres), lacking dense vegetation, and not close to point or non -point sources of pollution are considered of low value. The GROUNDWATER RECHARGE FUNCTION is defined by the interaction of the underlying geology and soils, and the surface topography. This function provides for the movement of surface water into groundwater systems. Important to this function is wetland size, period of inundation, and depth of standing water within the wetland. High value is given to permanently inundated wetlands greater than 10 acres in size. Medium value is given to wetlands which are seasonally flooded and 5 to 10 acres is size. Wetlands less than 5 acres in size, isolated, and temporarily saturated are considered of low value. . The NATURAL BIOLOGICAL FUNCTION is defined by the complexity of physical habitats and biological species within the wetland area. The value given to a wetland depends upon its ability to provide habitat for nesting (spawning), 02154 Lakeridge - S WetlanftVildlife Report incubation, feeding, rearing, and cover of aquatic and terrestrial animal and fish species. In addition, the ability of a wetland to provide support for varying food chains is an important element in value assessment. Wetlands of high species diversity, three or more habitat types, unique habitat features, large in size, and associated with a permanent stream or tidal marsh are considered of high value. Wetlands with moderate species diversity, two habitat types, moderate in size, and associated with an intermittent stream or high salt marsh are considered of medium value. A low value is given to wetlands of low species diversity, small size, and isolated. These six functions are rated low, moderate, or high, based on the criteria outlined above. These criteria are guidelines compiled from Adamus (1987) and Reppert (1979) and professional judgment must be exercised in assessing these criteria. Overall values for a wetland are assigned, based on a synthesis of individual values. In addition to intrinsic functions, extrinsic functions are also recognized. These extrinsic functions provide social values that have indirect benefits to wetlands. Education and recreational opportunities are most often mentioned as extrinsic functions. -Associated values are often subjective and are thus difficult to evaluate: As such, these functions are not rated, but are nonetheless important when considering creation, restoration, or enhancement projects. ONSITE WETLAND !VALUATION Following the function and value assessment process noted above Wetland C was rated as exhibiting a low rating: a Water Quality Benefits - This wetland was small and had been impacted by prior grazing and. pasture and land management. - This wetland appeared to retain less than 25% of the runoff which occurred within the local area. This wetland also exhibited a limited vegetation diversity as a result of prior grazing_ The primary water quality benefit provided by this wetland was a very limited amount of biofiltration of surface stormwater. C Storinwater Storage - This wetland appeared within a topographic depression and had been impacted by prior land uses. This wetland was located in a rapidly developing part of King County. This wetland was small and exhibited a very limited ability to store stormwater. o Hydrologic Support - This wetland appeared small, and noted to pond a limited amount of surface water early in the growing season. Evidence of seasonal ponding and saturation to the surface was limited. 40 Groundwater Recharge - This wetland appeared small, and to pond a limited amount of surface water early in the growing season. Evidence of seasonal ponding and saturation to the surface was limited. 02154 Lakeridge - 9 WetlandANildlife Report G Natural Biological Function - This wetland was small, and exhibited a very limited range of plant diversity and vegetation complexity. Available habitat was dominated to young deciduous trees and a dense shrub community. Unique habitat features (i.e. snags, fallen trees, mature trees along the wetland boundary) were absent. This wetland included a large slash pile resulting from prior forest harvest_ ONSITE EVALUATION - WILDLIFE WILDLIFE STUDY METHODS The onsite assessment of wildlife species presence and available wildlife habitats was completed as a part of the onsite assessment of wetland characteristics. This assessment included both early moming and late afternoon observations. . Species presence and habitat utilization were evaluated following the methods identified by Homer and Raedeke (1989) and within U.S. Fish and Wildlife Service Publication 80158 (Mikol, 1980). In addition, the King County Wildlife Study Guidelines (Draft Wildlife Management in Kng County, Issue Paper, 1993) were also followed to assure consistency with the King County permit process and documentation of habitat types. Onsite activities documented observations of individual species presence, the general location of the species sighting, and the life history activity being undertaken. Sample stations were established within the site for these observations. This range of observations were documented because for many of the smaller, less mobile species (i.e. small mammals, amphibians) the project site may provide all of their life history requirements (nesting, cover, feeding, -and reproduction) while for the more mobile species (i.e. waterfowl, songbirds, medium sized mammals) the project site may be used for only a few of the life history requirements. These more mobile species may depend more upon adjacent habitat for more critical habitat needs such as nesting and cover from predators. It is unlikely based upon the existing site conditions, coupled with adjacent land uses, that species which require large areas of undisturbed habitat would exist onsite. ONSITE HABITAT TYPES The site exhibited one primary habitat type that had been manipulated as a part of past land use activities. A pasture plant community dominated this primary habitat type. This plant community had been created in the development of grazing opportunities for livestock. Included within this primary habitat type were two additional habitat types. 02154 Lakeridge - 10 WetlandPW IdIde Report As defined by Kng County, the "habitat type" best represented within the site was "Agricultural." The primary vegetation within this habitat type is introduced and cultivated pasture grasses. One additional habitat type was Mixed Upland Forest -low understory. This upland habitat type has been manipulated and modified by prior forest harvest activities. In parcel A, the entire site was managed and maintained lawn. The adjacent properties also exhibited similar land use actions along with the development of single family homesites: The 6wet meadow" habitat type was identified as present within the central drainage corridor (Wetland C). This habitat type had also been impacted by prior forest harvest activities and adjacent land uses. This habitat type was comprise entirely of reed canarygrass_ PRIMARY HABITAT TYPES INCLUDED MINOR HABITAT TYPES - Agricultural Lands Wet meadow - Residential Mixed Upland Forest -low understo PLANT AND ANIMAL SPECIES OBSERVATIONS Agricultural Lands: The majority of the 12-acre project site was identified to be dominated by'a. pasture, grass plant community. � The primary plant species were introduced and cultivated pasture grasses.'- Tree cover was limited to individual trees, Douglas firs. - Avian species observed within this coniferous upland forest habitat type included tree swallow (Tachycineta bicolor), song sparrow (Melospiza melodia), American crow (Corvus brachynchos), American robin (Turdus migratorius), house finch (Passer domesbcus), Steller's jay (Cyanocitta stellen), black -capped chickadee (Parus atricapillus), varied thrush (lxoreus naevius), and rufous sided towhee (Pipilo erythrophthalmus). These avian species were feeding throughout this habitat type with the greatest number of observations noted along the.edge between this pasture and the upland forested habitat type. This habitat type also appeared to provide cover to many species that also used the adjacent areas, particularly the residential areas. Mixed Upland Forest: A portion of the project site was identified to be dominated by a mixed upland forest plant community. Total crown cover exceeded 60 percent. The primary tree species was Douglas fir that had been retained following prior forest harvest. Additional tree species include Western hemlock, big leaf maple, western red cedar, hawthorn, cascara, black cottonwood, and red alder. The understory was dense and composed of a wide variety of shrubs and herbaceous species. Avian species observed within this coniferous upland forest habitat type included tree swallow (Tachycineta bicolor), song sparrow (Melospiza melodia), dark eyed junco (Junco hyemalis), American crow (Corvus brachynchos), American robin (Turdus migratorius), golden crown kinglet (Regulus satrapa), bushtit (Psaltriparus minimus), house finch (Passer domesticus), Steller's jay .(Cyanocitta stollen), pine siskin (Carduelis pinus), black -capped chickadee (Parus atricapillus), brown creeper (Certhia americana), ruffed grouse (Bonasa umbellus), varied thrush (lxoreus naevius), rufous sided towhee (Pipilo 02154 Lakeridge - 11 WeUand/WildRe Report erythrophthalmus), Northern flicker (Colaptes auratus), and hairy woodpecker (Picoides villosus). These avian species were feeding throughout this habitat type with the greatest number of observations noted along the edge between this upland forested habitat type and the pasture areas. This habitat type also appeared to provide cover to many species that also used the adjacent areas, particularly the residential areas. A number of nests were observed onsite and appeared to have been used during the 2002 breeding season. A limited number of stumps and snag trees are present within this plant community. These stumps and snags appeared well utilized as feeding areas by a wide variety of avian species, particularly hairy woodpeckers, creepers, and Northem flicker. A few of these snags also exhibited a limited use by pileated woodpecker (Drpocopus pileatus). Mammal species observed within this habitat type included deer mouse (Peromyscus maniculatus), shrew (Sorex spp.), opossum (Didelphis virginianus), Douglas squirrel (Tamiasciurus douglasti , mountain beaver (Aplodonfia rufa), raccoon (Procyon lotor), and black tailed deer (0docodeus hemronus)_ !Alex Meadow: An emergent wetland area was identified in the southern portion of parcel B portion of the project site. This wetland represented less than 5% of the total project area, had been greatly modified by prior pasture management and grazing activities, and was dominated by an emergent plant community of reed canarygrass. Grading has enhanced an existing Swale. that ran through the .property. Avian - species observed within this freshwater wetland habitat type included tree swallow, violet green shallow (Tachycineta thallassina), barn shallow (Hirundo rustica), song sparrow, dark eyed junco, and American robin. These avian species were noted to use the "edge" between the mixed wetland habitat type and the pasture habitat type. Many of these avian species were feeding and seeking cover either within this wetland habitat type or within the adjacent upland forest plant community. This wetland plant community did not include any woody habitat features. As identified the apparent length of surface water ponding resulting from water retention by the wetland would be inadequate to provide spawning habitat for amphibians. MOVEMENT CORRIDORS As identified by onsite wildlife trials, small and medium size mammals appeared to be moving throughout the project site and into the adjacent areas_ The larger of these trails (many of which are logging roadways and draglines) also appeared to be used by domestic cats, domestic dogs, horses, and neighbors. 02154 Lakeridge - 12 WedandAtVildife Report PRIORITY SPECIES Two wildlife species identified by the State of Washington as "Priority Species" were observed onsite during this assessment. Black tailed deer and ruffed grouse are noted by the State of Washington as a "priority species" because these species are regulated as "game" species. The project site may also provides suitable habitat for other game species such as mourning dove (Zenaida marroura) and band -tailed pigeon (Columba fasciata)_ STATE CANDIDATE SPECIES A single "State Candidate" species - the pileated woodpecker - was observed to utilize the forested areas onsite. State candidate species are presently under review by the State of Washington Department of Fish and Wildlife (WDFW) for possible listing as endangered, threatened, or sensitive. WDFW has developed a list of recommendations for management of the pileated woodpecker that focused on the preservation of nesting habitat. As defined by WDFW the most popular nest trees are typically hard snags with bark and broken tops within riparian areas. REGULATORY CONSIDERATION The proposed alteration of lands defined by various federal, state, and local authority rules and regulations as "'wetlands". raises environmental concerns that are generally addressed in the development review process. These concerns center around the development's potential adverse impacts to the structure, function, value, and size of these "wetland" areas. Such adverse impacts may include a reduction in wildlife habitats, reduced surface water quality, reduced water retention, a reduced ground water recharge rate, reduced plant species diversity, and the reduction in the function and value of other associated wetland and non -wetland characteristics. U.S. ,ARMY CORPS OF ENGINEERS - Section 404 Section 404 of the Clean Water Act (33 U.S.C. 1344) prohibits the discharge of dredged or fill material into 'Waters of the United States" without a permit from the Corps of Engineers (Corps). The Corps has jurisdiction over freshwater systems waterward from the ordinary high water line of a water body or waterward from the upland boundary of the adjacent wetland. The definition of fill materials includes the replacement of aquatic areas with dry land, grading which changes the surface contour of a wetland, and mechanized land clearing in wetlands. For the purposes of Section 404 permitting the Corps makes the -final determination as to whether an area meets the wetland definition and would be subject to regulation under the Corps program. Currently the Corps has two specific types of permits which apply to wetland fill proposals. These two types are a series of specific Nationwide Permits and the 02154 Lakeridge - 13 WetlandlWildlife Report Individual Permit. The Nationwide Permit process identifies specific categories of work that can be undertaken following a set of specific conditions applicable to each Nationwide Permit number. For example; NWP#12 allows for the limited, short term impacts to wetlands for the placement of utilities, and NWP#14 allows for a limited impact to wetlands as a part of the development of a roadway crossing. The Corps has noted several times within information papers, documents, and workshops that a project proponent that places fill within a wetland without specific Corps authorization does so 'at the proponents own risk The Corps requires an Individual Permit where a proposed activities within an identified jurisdictional wetland area can not be authorized under one of the Nationwide Permits. Within the Individual Permit process the Corps undertakes a much more in- depth review of the proposed project and the proposed impacts. The Corps must evaluate whether the benefits derived from the project outweigh the foreseeable environmental impacts of the projects completion. STATE OF WASHINGTON DEPARTMENT OF ECOLOGY Proposed action undertaken through either of the Corps of Engineers processes (Nationwide, Individual, or isolated) are also subject to the provisions of the Washington State Department of Ecology Wafer Quality Certification' Process. Projects that may be exempt from Corps of Engineers Section 404 jurisdiction may still require review by the Washington State Department of Ecology to ensure consistency with State water quality protection provisions. KING COUNTY - "Environmentally Sensitive Areas" Ordinance 29A.24 C Wetland and Stream Classes King County regulates activities in and around wetland areas. Such regulations also require that an undisturbed native vegetation buffer be retained along the upland side of the identified wetland areas. To assist in this regulation the County has defined classes by which to regulate wetlands, streams, and their associated buffer area. These categories are based on such features as size; the presence of endangered or threatened plants, fish, or animals; regionally rare wetlands; , wetlands of local significance for wildlife or stormwater functions; the number of wetland Gasses and subclasses; and percentage of open water. A Class 1 Wetland. means a wetland assigned the Unique/Outstanding rating in the King County Wetlands Inventory, or any wetland which meets any of the following criteria: The presence of species listed by the federal government or state as endangered, or threatened, or the presence of critical or outstanding actual habitat for those species; 02154 Lakeridge - 14 WetlandWildlife Report 2. Wetlands having 40% to 60% permanent open water in dispersed patches with two or more classes of vegetation; 3. Wetlands equal to or greater than ten acres in size and having three or more wetland Gasses, one of which is open water; or 4. The presence of plant associations of infrequent occurrence. A Class 2 Wetland means a wetland assigned the Significant #2 Rating in the Kng County Wetlands Inventory; or any wetlands which meet any of the following criteria: 1. Wetlands greater that one acre in size; 2. Wetlands equal to or less that one. acre in size and having three or more wetland classes; 3. Wetlands equal to or less than one acre that have a forested wetland class; 4. The presence of heron rookeries or raptor nesting trees. A Class 3 Wetland means a wetland assigned a Lesser Concern #3 Rating in the King County Wetlands Inventory, 1983, or uninventoried wetlands that area equal to or less than one acre in size and that have two or fewer wetland classes. King county defines °Streams" as those areas in King County where surface waters produce a defined channel or bed, not including irrigation ditches, canals, storm or surface water run-off devices or other entirely. artificial watercourses, unless they are used .by salmonids or are used to convey streams naturally occurring prior to construction in such'watercourses. G Required Suffers King County has established a standard buffer to be applied to a wetland or stream to assure protection of the wetland function and value. 'This buffer area is measured perpendicular to the defined wetland edge or perpendicular to the identified ordinary high water mark of a stream. WETLAND CLASS STANDARD BUFFER WIDTH 1 100 feet 2 50 feet 3 25 feet King County allows the standard buffer to be modified where such actions would provide additional protection- to wetlands or enhance' the wetland's functions (21A.24.320.B). Buffer averaging may be allowed as long as the total area contained in the buffer on the development proposal site does not decrease and the minimum width of the final buffer is not less than 65% of the standard buffer width. 02154 Lakeridge - 15 WetlandNVildlife Report SELECTED ACTION PLAN The Selected Action Plan of the Lakeridge project site focuses on the creation of independent lots suitable for the development of single-family homesites consistent with the King County Comprehensive Plan. A primary feature in the creation of these homesite lots will be the establishment of a protective buffer adjacent to the identified onsite wetland consistent with the King County Environmental Sensitive Areas Ordinance. The creation of these homesite lots will not require the adverse impact or placement of fill within identified wetland area or buffer. 02154 l..akeridge -16 Wetiandrildlife Report Ri CD N •w i �•�.�.�1rN . Av SErmna 156TH i �••..''' o 4,� �:�.., ,,�, i ..� 157T1{ P SE ~P J 4000 } AU (� (n to 11 --i } rn AU S£ SE w m r 158 k AV SE m C° �� c ril c I58Ty AU m SE c .60pi PL SE � cn "` ' ----- C7 V 16THp br" 6 is A - m �' 160TH q`. S SSW 14200 14000 AU a � S£ F 12800 164TH T�p,,7 PL SE r,, ^' - s4rr,�av S� -----16 D w 165TH PL SE r(„ = AU 50 � 106�}'H _P L 5 E �. ,� �m ��`�a.� .yl.M� �' �.._.__145()0 165TF R S M � H ' AU r- F 1FCI lssr SE i V_ st d 7 6aTN AVE t �' I BTH !Im 169TH Q I--, A -- ILI• HAS07AT - Figure 2 TECHNOLOGIES NWI Resource MappOng V 0 9 ,L f I R 0 0 IMP jrM Wl 'x`'�Ji!• 1 .S 'eas s _ n. e, f ice• a v cri '' � . a• , 'c a . e n a .IN 'Y OF `mow Cl'a u_ a a0 0- p"aan P d r o:lw ola e - - n C'bQ p• W _ p' -,. p b d'1 DJQ. Q. 6a a s p a p 6 aC Q Qp ' d 4 6 a C n 3n }`•s p ` - n p Ir G A IL `7 `.1�•:.1r�. _ - as la n -- ~. _ n• d. e- [n1�I��` Figuire 4 TECHHOLOGUES S®aO Et 2pping 51 `IZ b ✓ �F ✓J REFERENCE LIST Adamus, P.R., E.J. Clairain Jr., R.D. Smith, and R.E. Young. 1987. Wetland Evaluation Technique (WET); Volume ll: Methodology, Operational Draft Technical Report Y-87, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of the United States. Office of Biological Services, U.S. Fish and Wildlife Service, U.S. Department of the Interior, FWS/OBS 79/31. Environmental Laboratory. 1987. "Corps of Engineers Wetlands Delineation Manual," Technical Report Y-87-1, US army Engineer Waterways Experiment Station, Vicksburg, Miss. Hitchcock, C.L., A Cronquist. 1977. Flora of the Pacific Northwest. University of Washington Press. Seattle, Washington. Homer, R.R. and K.J. Raedeke. 1989. Guide for Wetland Mitigation Project Monitoring. Washington State Department of Transportation. contract number GC8286, task 6. King County Department of Natural Resources. 1993. , DRAFT Wildlife Management in King County: Issue Paper. Mikol, S-A_ 1980. Field Guidelines for Using Transects to .Sample Nongame Bird Populations. U.S. Fish and Wildlife Service publication'FWS/OBS - 80/58. Reppert, R.T., W. Sigleo, E_ Stakhiv, L. Messman, and C. Meyers. 1979. Wetland Values - Concepts and Methods for Wetland Evaluation. Research Report 79-R1, U.S. Army Corps of Engineers, Institute for Water Resources, Fort Belvoir, Virginia. U.S. Department of Agriculture, Soils Conservation Service. Soils Survey of Kng County Area Washington; Nov. 1973. Washington State Department of Ecology. 1997. Washington State Wetlands Identification and Delineation Manual. Publication Number 96-94. Washington State Department of 'Fisheries, Catalog of Washington Streams and Salmon Utilization, Volume 1., 1975 02154 t.akeridge -18 WetlandlWildtife Report Data Form Routine Wetland Determination Wetland Data Point: SP 1 ProjectlSite: Laken ige Jab Number: 02164 AppffcantlOrvrper: Lakeridga Deveiopnxnt Date: September 10, 2002 lnvestfgator_ M. Heckart Crty: (No1.Nrm vegetation, soils, or hydrology been dishrrbed? Counter. 10B (Rio] Is the area a pdw t W pmbkm area? State: WA Vegetation lbrrdnant _ species _- can Nwra---- Stratumcovey u�akacar _.----------—..------� _.-------------------------- Yes Popcdus fric!►ncarpa Cotton -wood Tree 80 PAC Yes Poe pratensis Bluegrass Kwducky Herbaceous 100 FACU+ Sir Species that are OBI., FACW, cr PAC (aKcept FAC-): 60 Renwks appears to drain wed Hydrology [4o1 Recorded Data (describe in rernar►s) iNo] Stream, Lake, or Tide Gage Pal Aeliat Photograph [mil other (describe in remarks) Field Observations: Depth of Surface Water('m): 0 Depth to Free Water in PAW): >24 Depth to Saturated So".). >24 Rema"M rrw4ed and managed Iam1 appears to drain web Wefte►rd Hydndbgy indicators (al Inundated [No] Saturated in upper 12 inches [Nol Water rnarks [Nol Water lines [Nol Sediment deposits [Nol Drain;W patterns in vebands Nol Oxidized root cWnneis in upper 12 inches [No) Water -shined leaves (No] Local loll survey data (Rio] Other (expWn in remarks) Soils Depth Maui)( Color Mottte Color Mettle Texture, Concretions, M41 L.._AburldarscelCcr►trast. - •-• Rom. -..... _..... --- ...... �.__.. 0 to 6 1 C YR 31 none gravally loam 6 to t8 1(YR Ara none gravelly loam Hydric Sods indlcatom wol Histosol 1461 HmUc Epiedcr+ lNol Sutfidtc Odor (Nol Probable Aquitic Moist Regune (Nol Reducing Conditions lNal Gleyed or tow -Chrome Cobra Unit Name: Drainage Class: Remarks appears to drain well Wetland Determination [No] Concretions [No] High Organic % in Surface Layer [No] Organic Streaking [Nat Listed on local Hydric Soils List No] Listed on National Hydric Solis List [Tiol Other (explain in remarks) Taxonomy-.. [mil Field Observations match map Rio) Hydroplrytic Vegetation Present (No] This Data Point is a Wetland lftl Hydw Soils Preserd liol Weiland Hydrology Present Remarks welfanci criteria NOT met appears to drain well Page 1 of 9 Data Form Routine Wetland Determination Wetland Data Point: SP 2 Project/Site: Lakeridp Appk=*Owner. Lakcridge DavekVruwn Jots Number- 02164 Dade: September 10, 2002 Irm stIgator- Ni. Heckert City: [No] Have vegetation, soft, or hydrology been disturbed? County: King [do) Is the area a potential problem area? State: WA Vegetation Camrmn Now _ — ._ ..._ ----. stratum_-- ',i cover__ triftatix Yes Rubus Procmus PJ Mua1 9lackberry,H1malsya Shrub 30 FACU Yes potygonum auspidatum Knotwned,Japanese Herbaceous 40 NI No Phatens amndinaces Qrass,RoW Canary Herbaceous 10 FACW % Species that are OBL, FACW, or FAC (except FAC-): p Retnartcs appears to drabs well Hydrology [No] Recorded Data (desedbe in rernarks) [No] Stream, Lake, or Tide Gage Pal Aerial Photograph 14*1 Of w-(describe to mammies) Field Observations: Depth of Surface Water(ln.): 0 Depth to Free Water in Pd(in.): >24 Depth to Saturated Shcs(in.): >24 Remarks N central by N boundary appears to drain well Soils FAaft Color Mottle Color Mottle 0 to 18 10YR Fly&k Sods lnescators [401 Hiistoaoi [go1 Histic Fcpipedon tNbl StAfidic Odor (No] Probable Aquatic Moist Regime [No] Reducing Conditions [No] Geyed or Low-Chroma Coiors Unit Name: Drainage Class: Remarks appears to drain well Wetland Determination [ill Hydrophffic Vegetation Present (No] Hydric Soft Present [No] Wettand Hydrology Present Renwits wetland criteria NOT and appears to drain well Cowardin Ctassftation: Wetland Hydrology lndcators [No] Inundated [No] Saturated in upper 12 inches [No] Water marks [No] Water tines [No] Sediment deposrb 1111o] Drainage patterns in wetlands [No] O*d¢ed root channels in upper 12 inches [Mal Water -stained leaves [No] Local toil survey data [No] Other (wV-Wn In remarks) Texture, C.omweb", -----....---..._-. ------- _._................ Wane gravelly till [No] Concretion" [No] High organic % in surface Layer [idol Organic Streaking [No] Listed on Locat Hy+drtc Sots List pNo] Listed on National Hydrijc Sorts List [No] Other (explain in remarks) Taxnno ny: [No] Field Observations match map [fdo) This Data Point is a Weand Page 2 of 9 Data Form Routine Wetiand Determination Wetland Data Point SP 3 ProjeWSite: Lakeridge AppIIcant/owner. L,*vridge Devalapanrrd Jab Number 02164 Date: September 10. 2M Imresiigetor M. Lucent Cw lftl Have vegeb0on, sAAK or hi'arlogy been disturbed? County: King (No] is the arm a patents pro0wa area? Stabs WA Vegetation for? Idams----•--•----...---------6truhan^�._.. % Cover- Indicator Yes Juncus Efftrsus L. Rush,&A Herbaceous 30 FACW Yes Agrosft Tent& SRO. Be 'edoniai Herbaceous 30 FAC Yes Agropyron mpens Quackraw Herbaceous 30 FACU % Species that are 0131., FACW, or FAC (except FAG): a6 Rusks old road bed Hydrology ovol Recm&d Data (describe in remarim) (Alol Stream. Lake, or Tide Cage No] Aerial Ptw WnWh (@+Inl other (describe in renroft) FIM Obsernations: Depth of Surface Water(in.). 0 Depth to Free Weser in Pit(in.): >Z4 Depth to Saturated Sorls(in.): >24 Remarks , NW oorner appears to drain well Soils Cowar+din Chwalficatkn: Wetland Hly&&dgy Indcatw3 (Nal inundated No] Saturated in upper 12 hntws Imo] Water r eft (Vol Water ii M (ftl Sed dent [Nol Drainage patterns in wetlands M Oxfted root channels in upper 12 inches [No) Water-abir*d Ives iMol Local wfl survey data (No] Other (wplaln In remarim) Depth Matrix Cow Mottle Color Motile TeXtUre. Concretions, Moist) _ AbxyancelCor>frosttwes __ _.._._ — - -Rh1- - - - • - - •... 0 to 8 MR 30 Torre gMvetly nil Hydda Sags Nrdicators [No] Hwwaa (Nol Histic Epipedon (Not Suitidic Odor (Not Probable Aquitia Moist Reg nie (Nol Redu cft Conditia ns [No] cleyed or Lvw-Chrorna Colons Unit Narnw. Drainage Class: Remarks geo tech Fabric at 8' Wetland Determination (Nol Concretions Plo) High Organic % in Surface layrsr [Nol Organic Streaking Pilo] Listed on Local Hydric Sails List IHo] Listed on National Hydric Saris List 1No) Othor (explain in rernarks) Taw any Into] Field Otiorns match map Viol Hydrophytic Vegetation Present VNo) 7b1s Data Point is a Wetland iNol Hydric Sons Present [No] Wettand Hydrology Present Remarks watiand criteria NOT met appears to drain well Page 3 of 9 Data Form Routine Wetland Deterrtmination Wetland Data Point SP a PrnjeWStte. Lakeridge AppficarWOwner. Lakeridge Dsveloprrtsnt Irn"ttpator. AL Hecker! Job Number. 02164 Date. Septerrdw 10, 2002 lNOl Have vegetatlon, soils, or hydrology been disturbed? County: Khm [No] Is the area a potential prob!em arm? State: WA Vegetation DwrdrmM 5pew _ _ _ — Cowan Name --- ---- — --- sbattpn T_-- -Shrub 96 Cow Ott] or Yes ftdaus rubra Alder,Red 20 FAC yes sarxlasiand►a Wd1ow1Padtic Shrub 30 FACW+ No Popuka whocame Cott[ n-Wood sap Shrub 30 FAC % Species Mad are OSL, FACW, or FAC (wm*pt FAC-): 106 Remarks Hydrology ]Flo] Recorded Data (describe in remarks) [No] Stream, take, or Tide Gage [Nol Aerial Photograph [No) Other (describe in remarks) Feld Observations: Depth of Surface Watw(in.): 0 Depth to Free Water In PAIn.)- >24 Depth to Saturated Soifs(in.): >24 Remarks small prey*xty-Tilled deprt scion Coward'at Ciassirication: Weiland Hydrology Indicators ]No] Inundated (No] Saturated in upper 12 inches [No] water marks dies] Water fines (mil Sedirrent deposits Nol Drainage Patterns In wetlands [No) Oxidized root channels in upper 12 Inches (No] Water -stained Waves [No] Local soil survey data [Nol Other (eo"in in remarks) Soils Depth Matrix Color Mottle Color Mottle Texture, Concnftrts, il!> LihAm ell!u±oist� _ Ab ncdc«ttrasi.-- - — ----...--!--�y� ._ _..__.._.. — ... 0 to 12 10YR 4r3 none gra alty 12 to 18 10YR 15t2 Pone silty loam Hydric Soils Indicators [Rol Histxd [No] HMc Epipedon [No) SutNdic Odor [No] Probable Aquitic Moist Regime (No] Reducing Cortd>tions (No] Gieyed or Low-Ctuoma Colors Unit Name: Drainage Class: Remarks Prior Mod depression Wetland Determination lalCa=ft= [No] High Organic % in Surface Layer ("l organic streabna [No] Listed on Local Hydric Soils list (No] I on National Hydrie Sons List [Flo] Other (e*kb in i+emwks) Tavonarny: (No] Field Observations match map (Yes] "rophytic Vegetaffon Present [Nil This Data Point is a Wetland [No] Hydric Soils Present lY01 Wetland Hydrology PreseW Remarks vrettand Criteria NOT met appears to drain well Page 4 of 9 Data Form Routine Wetland Determination Wetland Data Point SP 5 Project/Site: Lafteridge Job Number. 02164 Appficanl/Owner: l.afteridge ant bate: Septendw 10. 2002 investigator: M. tleekert City: [No) Have vegetation, soils, or hydrology been dftrbeo County- Kirecg p4o)1s the area a pnterrtial prottsnr area? Stale: WA Vegetation pammaqdSpeciea _._. _ _ _ ___ cam"sa'-' memo -------------- Sb'aitur_i _ % Co�r_e�r_ — - Nuffic_a_tor T Yes Thule pkma Cedar,Weatem Red Tree 40 FAC Yes Ranunadus ac* Butter-Cup,Tall Herbaceous 6o FACW- Yes Pseudolsugs Menzwa Fir,Dotigtas Tree 8o FACU' No Agros6s Tends SOM. Berdgrasa,Comw Herbaceous 10 FAC % Species Out are OBL, FACW, or FAC (wwept FAG): BB Remarks appears to drain well Hydrology [Rol Recorded Data (describe in mffm w) [Ado) strearn, Lake, or Tide Gage Rol Aerial Photograph W Ogren (describe In remaft) Field Observations - Depth of Surface Water(in.): 0 Depth to Free Water in PK(m): a24 Depth to Saturated Soas(kn.): >24 Remadcs appears to drain well Cowrardln Classaflcaft: wetland Hydrology lndcators [Nol Inundated [No) Saturated In upper 12 inches [!Bo}Water marks Rol Water rum (4o] Sediment depwfts Oftl Drainage palterers in troeftxls [No] OAd¢ed root channels In upper 12 inches [No] Water-stahred leaves [►,do] Lail adl survey data [No} Other ("piatin in remarks) Soils Depth Mattbc Color Mottle Color Mottle, Texture, Concretions, A..- (Mansell Mo}s3 ._ 94aoist).._.-> nda!±cex oP----------------•-•-•-•---•-•--- - 0 to 18 1UYR Z512 none manure dump pile Hydric Soft Indicators [No] Histow [No) HWC Bpipedon [No] SuIWc Odor [[do] Probabie Aquitdo Moist Rtgtme [No] Reducing Coodlions (16o] Gleyed or Low-Chroma Colors Unit Name: Drainage Class: Remarks manure dump pile Wetland Determination (No] Concretions [!Yo] High Orgarrla % in Surface Layer pool Organic Stivio" lam] Listed on Local Hydric Soils List Poi Listed on National Hydric Soils List ]4o1 Other (explain in rwvuw cs) Taxonomy: [No] Field Observations thatch map [Yes) HydrophyW Vegetation Present [tio] This Data Point Is a Welland [Yes; Hydric Soils Present [No] Wetland Hydrology Present Remarks manure dump plie appears to drain w H Page 5of9 Data Form Routine Wetland Determination Wettand Data Point SP 10 ProjaWSRe: Lakeridge Job Number: 02164 AppHcw*Owner. Lakeridge DevOoprtrent Date: 5eptamber 10. 2002 l+tvesElgeitar. M. Heckert City: ]No] Have vegetatlorn, tolls, or hydrology been disturbed? County- King [No] is the area a potential problem area? State: WA Vegetation Dominant-- -Spades --- _ _.......-------Conumm Norm Stratum % Cover IndicatorYes Rgnxstis Atha L Redtop Herbaceous 100 PAW, % Species that are OBL, FACW, or FAC (except FAC-): 100 Cowardin Classification: Remarks appears to drain well no redox chara. Hydrology [No] Recorded Data (dpscrft in remarks) Welland Hydrology Indicators [mil Stream, take, or Tide Gage ]No] inundated lNo] Aerial Photograph ]No] Saturated in upper 12 Inches [NO] Other (describe in remarks) [No] Water marks Field Obaenrations: Depth of Surface Water('ai.): 0 Depth to Free Water in PtVn.): >M Depth to Saturated Soft (in.): >24 Remarks no hydro characteristics appears to drain well Soils Matrbc Color 0108 1M 2.9l2 8 to 16 1 OYR 313 Mottle Color Mottle Hydnc Soft Indcators [No] Hisiosol [No] Histic Epipedon (No] Sutiidic Odor [Nol Probable Aquitic Moist Regime Idol Reducing Conditions [No] Gteyed or Law -Chrome Colors Unit Name: Drainage Class: Remarks no redox appears to drain well Wetland Determination (No] Water lines [No] Sediment deposits [No] Drainage patterns in wetlarxls [No] Oxidized root channels in upper 12 inches ]No] Water -stained leaves ill Local loll survey data ]No] Other (ogAaln in remarks) Texture, Concredons, loam v loam [No) concretions [No] High Organic % in Surface Layer [No] Organic Streaking [No] listed on Local Hydric Soils List [No] Listed on National Hydric Soils List [4*1 Other (ayptaln in remarks) Taxorwmy. [No] Field Obsetvatians match map [Yes] Hydrophytic Vegetation Present. [No] This Data Point is a Wetland tMo] Hydric SoBs Present (No] Wetland HydrokW Present Remarks wetland criteria NOT met appears to drain well Page 6 of 9 Data Form Routine Wetland Determination Wetland Data Point: SP 11 Project/Site: Lakeridge Job Number: 02154 Applicanl/Owner: Lakeriel" DevelopmeW Dale. Septen w 10, 2002 Irnestigator. M. Heckert City. (Mo] Have vegetation, soils, or hydrology been disturbed? County: King [pia] Is the area a potential problem area? State: WA Vegetation CkcrS;rtant---SPecw'5- __.—..carmnon !ire —_ _...----.. .stratum � _ % Corm km*ator Yes Phalan$ arundrracaa Grass,Reed Canary Herbaceous 100 FACW % SpeCies that are OBL, FACW, or FAC (except FAG): 100 Remarks appears to drain poorly root my Hydrology lfdnl Recorded Data (describe In rernafics) [No] Stream, Lake, or Tide C 490 V401 Aerial Photograph . [ddol Other (describe In remarks) Field Otwmrvabons: Depth of Surface Water(m.). 0 Depth to Free Water In Pkttn.): >24 Depth to Saturated SoUsM.): >24 Remarks appears to drain paorty Coiwdin Classification: PEME Waffand Hydrology Indicators [No] Inundated [No] Saturated In upper 12 Inches [Yes} Water marks [No] Water limes No] Sediment deposits [Yes] Drainage patterns in wetlands [Yes] Oxidized root channels in upper 12 inches [No] Water -stained leaves •[No] Local soil survey data [No] Other (explain in remarks) Soils Depth Matrix Color Mottle Color Mottle Texture, Concretions, {Mt>rlseli Moisfj ._ �MtuuQli Maisil_._- AburrCar lCxxrt►-ast ....... ._-•---- ---------- _... ii¢osphw! etc:.---.--- --- -- _ 0 to 15 10YR 2.511 none slit loam Hydric Sails lndlCatorS [No] HistoFd No] Histic Epipedon lol SOAF41C Odor [Yes] ProWble Aquitk: Moist Regime [Yes] ReeucirV Conditions [Yes] Gleyed or LonuChroma Colors Unit Name: Drainage Class: Remarks appears to drain poorly Wetland Determination [Nol Concretions [Yes] High Organic % In Surface Layer [No] Organic Strealdng [No] Listed on Local Hydric Sails List [Nol Listed on NafiwW Hydric Sob list [No] Other (explaln in remarks) Taxawrny. [Nol Field Observations match map [Yes] Hydmphybc Vegdabon Present Fired This Data Point is a Wetland [Yes] Hydric Soils Present [Yes] Wetland Hydrology Present Remarks wefnd criteria MET appears to drain poorly wetland cr9teria NOT met appears to drain weli - — _ — — Page 7 of 9 Page 8 of 9 Data Form Routine Wetland Detennination Wetland Data Point SP 15 ProjecvSde' Lakerhkjo Job Number 02154 ApplicwWOwner LakerkW Denkpymd Date: Septengwr 10, 2002 (rmnfigaitor. M. Heckert CIw. 14o) Have vegetation, soft, or hydrology been disturbed? County. w" Octal Is the area a potential Problem arm? State: WA Vegetation Do"Tinaw S COMMw Na= Sbvtum %-Cover Ind"or Yes Juncus Eft= L Rush,Soft Herbaceous 30 FACW Yes Phafatfs snjn&mcea Cwass, Reed Canary Herbaceous so. FACW No Agrosft albs Redtop Herbaceous 10 FACW 16 Species that are OBL, FACW. or FAC (except FAC-): 100 Remarks appears to drain well no root oxydation Hydrology [No] Recorded Data (describe in remaft) [No] Stream. Lake. or Tide Gage Wo] Aen2d Photograph No) Other (describe in remarks) Field Obsemborm: Depth Of sw1ace watKWL): 0 Depth to Free water in Pkim): >24 Depth to Saturated Soft(lm)-- ;-24 Remarks - at edge of depression appears to drain well Cawardin Chepaffication: Wedand Hydrology Indcaters [No] Inundated [No) Saturated in upper 12 inches [NO) water marks [No] Water riner. (Nol Sediment deposits [No] Drainage pattern in wedande [No] Oxidized root channels in upper 12 inches (No] Water-sWbwl kwvft [Nol Local soil survey data [No] Other (mq)lam in remarks) Soils Depth Matrix COW Mottle Color Mottle Texture, ConcnAions, M .... C - w0ast Rhizop h . .... p Lg!5 ...... 0to6 10YR 312 none compacted gravelly barn 6 to 18 ---- - -- - - - - -- 1 OYR 3G none - - ---- - ---------- compacted gravelly loam hydnic Soft bdca tots [Not Histosol ]No] HWc Epipedon [No] Sulfidic Odor [No) Probable Aquft Moist Regime [No] Reducing Cortdftm - ]f4ol Gleyed or Low-Chroma Colors Unit Name: Drainage Class: Remarks severety compacted appears to dram well Wetland Determination [No] Concretions [Nol High Organic % in Surface Layer p4o) Organic Strealdrig lNol Listed an Local Hydft Soils List [idol Listed on National h)*c Soils List [Nol Other (explain in remarks) Tawr"TT. [No] Field Observations match map [Yes] Hydrophyft vegetation Present [No) This Data Point is a Wetland ]Nol Hydric; Soils Present [No] Wetland Hydrology PreseM Remarks vmdand criteria NOT met appears to drain well Page 8 of 9 Data Form . Routine Wetland Determination Wetland Data Point: SP IS Project/Site: Lakeridge _ Appl cantlowner. LalYeridge Devesopment Investiga t= M. Heckert Job Number 02154 Date: September 10, 2002 City: [No] Have vegetation, soils, or hydrology been disturbed? County: King [Ada] Is the area a potential problem area? State_ WA Vegetation DanssrLantspecies _ --^_. _ Catrv>rron Name -- _---.----- Stratum - -—�f'_Coret I�icator Yes Fhalads anrndnacea Grass,Reed Canary Herbaceous 100 FACW % Species that are OBL, FACW, or FAG (except FAG): 100 Cowardin CtassiCxation: PEME Remarks appears to drain poorly Hydrology [No] Recorded Data (describe in remarks) [Ado] Stream, Lake, or Tide Gage [No] Aerial Photograph [Na] Other (describe in remarks) Field Observations: Depth of Surface Watertin.): 0 Depth to Free Water in Pii(in.): >24 Depth to Saturated Sorils(in.): >24 Remarks appears to drain poorly WNeffand Hydrology lnoicators [No] Inundated [Nol Saturated in upper 12 inches [Yes] Water marks (too) Water fines [No] Sedmrent deposits [Yes] Drainage patterns in wetlands [Yes) Oxidized root channels in upper 12 Inches (No] Water -stained leaves [No] Local soil survey data [No] Other (explain in remarks) Soils Depth Matrix Color Mottle Color Mottle Texture, Concretions. C+!►]_-•---..{Memsen.ImU_nsell Moist) Abulticfancpl�antra3t..-----•----•-----•-----_-•--Rhi2. s. Fte[es, e4C° 4 to 16 1 QYR 2-5r2 1 OYR 516 prom and conunan concro ions silty loam Hydric Scas Indicators [No] Histosol No] Histic Epipedon [No] Sulfide Odor [Yes] Probable Aquitic Moist Regime [Yes] Reducing Conditions [No] Gleyed or Low-Chrwna Colors Unit Name: Drainage Class: Remarks compacted appears to drain poorly Wetland Determination IYes] Hydrophytio Vegetation Present ides] Hydric Sails Present [Yes] Wetland Hydrology Present Remarks wetland criteria MET appears to drain poorly [Yes] Concretions [Yes) High Organic % in Surface Dyer [Yes] Organic Streaking [No] Listed on Local Hydric Soils List [No] Listed on National Hydnc Soils List [Nol Other (explain in remarks) Taxonomy [Ho] Feld Observations match map [Yes] This Data Poird is a Wetland Page 9 of 9 LEVEL I OFF -SITE ANALYSIS FOR LIBERTY GROVE CONTIGUOUS CLIENT: Lakeridge Development P.O. Box 146 Renton, WA 98057 Phone: (425) 228-9750 PREPARED BY: Daley -Morrow Poblete, Inc. 726 Auburn Way N Auburn, WA 98003 Phone: (253) 333-2200 Fax: (253) 333-2206 PROJECT: 01-470 DATE: March 3, 2003 R E C E � w E 0 MAR 112003 K.C. D.D.E.S. EXPIRES: JAM_ 9, 2004 STAW NOT YAL.1D UNLESS 9CNED AND DATED Lpappogs TABLE OF CONTENTS TASK 1: Study Area Definition and Daps General Information On -Site Drainage Analysis Upstream Drainage Analysis Downstream Drainage System Description Future Site Conditions TASK 2: Resource Review 1. Flood Plain/Floodway (FEMA) Maps 2. Offsite Analysis Reports 3. Sensitive Areas Information 4. SWM Division Drainage Investigation Information 5. King County Soils Survey Maps TASK 3: Field Inspection 1. Investigation of Reported or Observed Problems During Resource Review 2. Location of Existing/Potential Constrictions or Lack of Capacity in the Existing Drainage System 3. Identify Existing/Potential Flooding Problems 4. Identify Existing/Potential Overtopping, Scouring, Bank Sloughing, or Sedimentation 5. Identification of Significant Destruction of Aquatic Habitat or Organisms 6. Collect Qualitative Data on Land Use, Impervious Surfaces, Topography and Soil Types 7. Collect Information on Pipe Sizes, Channel Characteristics and Drainage Structures 8. Verify Tributary Basins Delineated in Task 1 9. Contact Neighboring Property Owners in the Area 10. Note the Date and Weather Conditions at the Time of the Site Visit TASK 4: Drainage System Description and Problem Description 1. Drainage System Descriptions 2. Problems TASK 5: Mitigation of Existing or Potential Problems APPENDIX Exhibit A Vicinity Map Exhibit B Drainage Basin Map Exhibit C Downstream Drainage System Map Exhibit D FEMA Map Exhibit E Assessors Map Exhibit F Sensitive Areas Information Exhibit G SWM Division Drainage Investigation information Exhibit H King County Soils Survey Map Exhibit I Off -Site Analysis Drainage System Table Exhibit J Site Plan of Liberty Grove Exhibit K Copy of December 5, 2002 letter from Haozous Engineering Exhibit L Copy of November 27, 2002 letter from Ms. Laura Casey TASK 1: Study Area Definition and Maps General Information The proposed Liberty Grove and Liberty Grove Contiguous developments will be within three separate parcels, located near the northwest and southeast comers of the intersection of SE 136 h Street and 160t' Avenue SE. Parcel 3664500141, which is located near the northwest comer of said intersection, will be designated as "Parcel A" in this report. Liberty Grove will be entirely within Parcel A. Parcels 1457500085 and 1457500090, which are located near the southeast comer of the previously mentioned intersection, will be designated as "Parcel B" in this report. Liberty Grove Contiguous will be entirely within Parcel B. The parcels are located within the NE and SE quarters of Section 14, Township 23 North, Range 5 East, Willamette Meridian, King County Washington. The project site is located within an area zoned R-4. Since both projects will be developed at the same time, and in fact will share the same detention facility, this off -site analysis will be for both projects. There is an existing house and shop within Parcel A, with the remainder of the site mostly covered with grass and some tree. Parcel A is approximately 4.84 acres and generally drains to the south. There are two houses within Parcel B, with associated structures. The 7.92-acre parcel is presently forested in the northeast comer, with the remainder of the site being dominated by pasture land. There is a wetland area within the southwest comer of Parcel B, which will remain, and will be protected by a 25-foot buffer. Site soils have been identified as Alderwood gravelly sandy loam by the U.S. Soil Conservation Service (SCS). On -Site Drainage Analysis Parcel A has an average slope of approximately 3.6 percent, and generally drains to the south via sheet flow. Parcel B has an average slope of 4 percent, and generally releases water along the southern property line. Upstream Drainage Analysis _ As shown in Exhibit B, Parcel A receives runoff from approximately 9.7 acres. The upstream basin is presently covered with trees, pasture land, grass and some houses. Water from said basin enters the site via sheet flow along the northern property line. Parcel B has an upstream area of approximately 13.1 acres. This basin is partially forested, but is dominated by single-family houses with a density of approximately 6 DU/GA. Water from the upstream area mostly enters the site via culvert that discharges near the northern property lime, and into a ditch that flows to a wetland area within the site. Downstream Drainage System Description As previously described, there are two separate areas to be developed as part of this project, which are designated as Parcels A and B. Parcel A presently discharges into an earth -lined ditch along its south property line. Water then enters a ditch along the western side of 160th Avenue SE and continues to flow south. Approximately %-mile downstream, a 12-inch diameter concrete culvert intercepts water and brings it across 160'h Avenue SE. We are proposing to bypass the above mentioned downstream system as part of the development, and will therefore provide no further analysis of said system. Furthermore, said system will most likely,be improved by the proposed Evendell Plat, located south of Parcel A. It is proposed to collect runoff from the developed Parcel A and its upstream tributary area, and convey it to the proposed detention facility within Parcel B. The existing downstream facilities from the proposed detention facility will therefore be described in more detail in this report. Parcel B presently discharges runoff along its south property line. However, most of the runoff passes thru an on -site wetland located near the southwest comer of Parcel B. Water that is released by the wetland is collected by a yard drain located within the adjacent parcel to the south. We were unable to enter the property to collect more information about the system within said property. Although we were unable to collect more information about the above mentioned yard drain, we believe this system will be inadequate to handle runoff from the proposed development. The County may however, require the existing hydrology to the wetland be retained, and therefore, the yard drain will continue to receive the same amount of runoff. It is proposed to construct the detention facility within the southeast corner of Parcel B. Discharge will be to the existing conveyance facilities along the east side of 160th Avenue SE. The drainage facilities consist of driveway culverts and drainage ditches_ The system components are shown in Exhibit C, and are itemized in the Off -site Analysis Drainage System Table (Exhibit 1). There have been several complaints within this downstream system, copies of which are included in Exhibit G. Furthermore since we are proposing to convey runoff from Parcel A to this system, the facility will have to convey more flows. We are therefore proposing to improve the conveyance facilities between point 1 to point 30 (See Exhibits C and 1). The new conveyance system will be design to handle the peak flow rates. Future Site Conditions This development involves the creation of sixty single-family residential lots within Parcels A and B. Access roads and roadway improvements will also be a part of the development. As previously stated, the detention facility will be constructed in the southeast comer of Parcel B. This development is within the Level 2 Flow Control Area, therefore, we are proposing to use the Level 2 Flow Control criteria to size the detention facility. A wetpond, sized per the Basic Water Quality Menu, will be constructed below the detention facility. The proposed facility will discharge to the facilities along the east side of 160t' Avenue SE. There have been several recorded complaints along this downstream route (See Exhibit G). Due to the proposed plan to convey water from Parcel A to Parcel B, runoff to the downstream facilities on the eastside of 160"' Avenue SE will be increased. It is therefore proposed to improve a portion of the downstream facilities to handle the post -development flows, and will be further discussed in Task 5 of this report. Per discussion with Mr. Bruce Whitaker of King County D.D.E.S, it is our understanding that developments within the basin will be required to provide downstream improvements, in lieu of the Level 3 Flow Control requirement. Although we are proposing to use the Level 2 Flow Control criteria together with downstream improvements, the pond shown in the Conceptual Drainage Plan, in our estimation, will be able to accommodate a pond sized per the Level 3 Flow Control criteria. There is a proposed development called Evendell Plat, which is located south of Parcel A and across the street from Parcel B. A Level 3 downstream analysis, dated August 26, 2002 has been prepared by Haozous Engineering for said development. The analysis was later supplemented by a letter from Houzous Engineering, dated December 5, 2002 (See Exhibit K), which identified conveyance facilities that need to be upgraded_ We believe that with the improvements proposed by Liberty Grove, and together with the improvement for Evendell Plat, most of the downstream problems will be eliminated. TASK 2: Resource Review The following is a description of each of the resources reviewed in preparation of this Downstream Analysis: 1. Flood Plain/Floodway (FEMA) Maps The site is not within a 100-year floodplain. Refer to Exhibit D. 2. Offsite Analysis Reports We have reviewed the Level 3 Downstream Drainage Analysis for the Evendell Plat. Evendell Plat is located south of Parcel A and west of Parcel B. We also reviewed a supplemental letter, dated December 5, 2002, which lists the downstream facilities that need to be upgraded by the Evendell Plat (See Exhibit K). We have also review the Preliminary Technical Information Report for Evendell Plat, dated June 15, 2001. 3. Sensitive Areas Information We have included a printout from the King County website as Exhibit F in this report. The printout shows that there are no sensitive areas on or adjacent to the site. However, a wetland area has been identified near the southwest comer of Parcel B. A wetland evaluation and delineation report has been prepared by Habitat Technologies. The report, dated November 5, .2002 has been review by Ms. Laura Casey of King County's Critical Areas Section. See Exhibit L for a copy of the letter from Ms. Casey. The wetland area is shown on the conceptual drainage plan, and will be within a Tract. 4. SWM Division Drainage Investigation Information There have been several recorded complaints, both on -site and within the downstream flow path. In Exhibit G, we have included a map showing the location of where each problem occurred and the complaint number. We have also included a summary of the pertinent complaints and a copy of each complaint. 5. King County Soils Survey Maps The soil underlying the site is Alderwood. A copy of the relevant page from the King County Soils Survey Map is included as Exhibit H. TASK 3: Field Inspection As previously mentioned, this project involves the development of Parcels A and B. Although the parcels are not connected, they are part of the same basin. Parcel A presently drains into the facilities along the western side of 160t' Avenue SE, while Parcel B presently drains into the eastern side of 160'h Avenue SE. The flows however converge further downstream. It is proposed to divert runoff from the developed Parcel A into the proposed detention facility within Parcel B. This analysis therefore focuses more on the facilities downstream from the proposed detention facility. Investigation of Reported or Observed Problems During Resource Review There were several drainage problems identified in the review. Please see Exhibits G, I and K, and also Task 5 of this report. 2. Location of Existing/Potential Constrictions or Lack of Capacity in the Existing Drainage System See Exhibit I. 3, Identify Existing/Potential Flooding Problems See Exhibits G, I and K 4. Identify Existing/Potential Overtopping, Scouring. Bank Sloughing, or Sedimentation See Exhibits G, I and K 5. Identification of Significant_ Destruction of Aquatic Habitat or Organisms At the time of the site visit, there where no signs of aquatic habitat or organism destruction. 6. Collect Qualitative Data on Land Use, Impervious Surfaces,. Topograghy.and Soil Twes Qualitative data has been collected from previous field visits. This information is included within this report. 7. Collect Information on Pipe Sizes, Channel Characteristics and Drainage Structures See Exhibits C and 1. 8. Verify Tributary Basins Delineated in Task 1 At the time of the site visit, the tributary basins described in Task 1 were verified as being accurate. 9. Contact Neighboring Property Owners in the Area At the time of the site visit, a neighbor living in address 13814 1600, Avenue SE was available during our site visit. This neighbor had previously complained about water overflowing from the ditch. along the west side of 160t' Avenue SE and flowing into the facility in front of his property, causing said system to fail (See Exhibit G). This problem has been identified for the Evendell Plat also, and improvements were proposed to eliminate this problem (See Exhibit K). We are also proposing to upgrade this system in front of his property. The wetland area within Parcel B currently drains across address 13802 160t' Avenue SE, before discharging into a channel behind the above mentioned neighbor's property (See Exhibit .C). Said neighbor stated that he constructed the channel to allow water to flow freely. He also stated that the channel is dry during summer and wet during winter. He mentioned that there was no problem with the system. Furthermore, due to the requirement to maintain the wetland hydrology (See Exhibit L), the proposed plat of Liberty Grove should not have any effect on the system. 10. Note the Date and Weather Conditions at the Time of the Site Visit The site and downstream system were visited on Jan. 17 and Jan. 20, 2002. It had just rained prior to our Jan. 20, 2002 visit. TASK 4: Drainage System Description and Problem Description Drainage System Descriptions: As previously stated, runoff from the developed Parcel A will be conveyed to the detention facility to be constructed within the southeastern comer of Parcel B. Discharge from the detention facility will be to the drainage facilities along the east side of 1601' Avenue SE, which is the focus of this report. The existing drainage facilities along the east side of 160"' Avenue SE consist of roadside ditches and driveway culverts. Several complaints have been filed due to the failure of this system. One residence has experience flooding on more than one occasion. Haozous Engineering, in their study of the downstream facilities, prepared a Level 3 analysis. A supplemental letter, dated December 5, 2002, outlining their proposed improvements is included as Exhibit K in this report. It is evident that the downstream facilities will have to be upgraded to fix the ongoing problems within said system. 2. Problems: A summary of the different complaints is included in Exhibit G. Please see Exhibits C and I also. TASK 5: Mitigation of Existing or Potential Problems Drainage facilities for the proposed Liberty Grove Plat will be designed using the guidelines within the King County Surface Water Design manual. The development is proposing to install a new detention and water quality facility within the southwest property comer using Level 2 Flow Control criteria and basic water quality requirements. Due to several recorded downstream drainage problems, we are proposing to improve some of the downstream facilities as shown in the Conceptual Drainage Plan. The new facilities will be designed per the quidelines within the 1998 King County Surface Water Design Manual. - Per discussion with Mr. Bruce in of King County D.D.E_S., - it is our under standing that downstream improvements will be required from similar projects within the basin in lieu of the Level 3 Flow Control requirement. The drainage complaints are included in Exhibit G. Also included in Exhibit G is a summary of the drainage complaints that relate to this project. Each complaint will be address as follows- 1. Complaint Number: 2000-0322 and 1982-0520 Address: 13612 160"' Ave. SE Description: Complaint 2000-0322 was a water quality complaint. Problem could not be identified; therefore the County closed the file. Complaint 1982-0520 was file in 1982 and involves flooding of the property_ Solution: These complaints originated from Parcel B of the project. These problems will be eliminated by the development of the property. 2. Complaint Number. 1989-0867 Address: 13802 160th Ave: SE Description: Was not available. Complaint may be too old and may already have been addressed. Solution: The County will require the 'Bows to the wetland within Parcel B to be .maintained, and therefore there should be no affect on this'property. 3. Complaint Number: CAR No. 99-004152 and CAR No. 01-005339 Address: 13814 160t' Ave. SE Description: Complaints indicated that the ditch in front of the property has plugged. King county responded by cleaning the ditch. The property owner indicated that the ditch along the west side of 160t' Avenue SE floods. When flooding occurs, water crosses onto his property. Solution: We are proposing to upgrade the facilities in front of this property to handle post -development peak flows. The proposed Plat of Evendell will be improving the west side 160t' Avenue SE, which will also help eliminate the problem. 4. Complaint Number. 1997-0203, 1997-0423 and Claim Nos. 31249 & 21860 Address: 14028 160'' Ave. SE Description: Complaint 1997-0423 is not available. Complaints 97-203 and Claim No. 21860 were filed by the previous owner Mr. Marshall Brenden. Claim No. 31249 was filed by the current owner Mr. Chad Myers.. All the complaints involve failure of the drainage system and flooding of the property, which includes flooding of the lower level of the house. Problem appears to have not yet been resolved. Solution: We are proposing to upgrade the facilities in front of this property to handle post -development peak flows. The proposed Plat of Evendell has also proposed to improve the system in front of this property (See Exhibit K). 5. Complaint Number: 1997-206 Address: 16046 SE 142"d PL. Description: Off -site flows impacting property. Property gets flooded and septic system operation impacted. Although Drainage Investigation Report does not indicate any actions were taken at the time of the complaint, it appears that the County has installed an 18-inch diameter pipe behind pipe behind his property. There is still a problem with erosion downstream from the 18-inch pipe. Solution: This is beyond'/ -mile downstream from the project site. We believe the Level 2 Flow Control requirement should be sufficient mitigation for the erosion problem. In addition to the above mentioned solutions, the conveyance facilities between point 1 and point 30 (See Exhibit C), will be analyzed and upgraded accordingly to handle post - development flows from the basin. This level 1 analysis has provided a complete review of the downstream conditions. With implementation of the conveyance, detention and water quality standards, the project should not pose significant negative impacts to the downstream drainage course. FXHIBI ` A sw 12 `O a I I SE 128TH STREET f (A f > f ¢ w l I 14 I 13 � I ¢ � a � I SE 136TH ST i I SITE ZL16TY IH.s. s L MAPLEIWOOD I f HEIGHTS E 1 PA K ^ I —I-- --�� ' -------{-- — S% -j N r- I RENTGN FlSH AND { a- l+BTR S7 I � GAMECLUB AREA I }� ES ROAIi� ' ♦9REC n+ LJ 4 =X)taREOO I 23 =� I I pryu 0 ONES I BHT I 0 VA�r {{ I I I ROAp I I 1 f f VICINITY MAP Scale: 1" = 1/2 MILE viz V ud d IQ w. Z 4 loo 400 scALc iN PUT I fm IN, ... ....... 0 ol h; -- c-1 :=Ok- 17 T EVCNDELL PEAT ok NN "N' ,441 zz Z tt A; r z C 35 3�V'ld H10St i U D 4 x 151ST PLACE p VI r� Z n m r� A m a ^' a M c i 154TH SOUTHEAST O Z m FEMA MAP s eAL,�: I 5M a c H m n H w rn s M m a AVENUE SOUTHEAST O PLACE SOUTHEAST 158TH AVENUE _NUE 5OUTHEAST t s m mm160THAVENUESOUTHEAST� LA l � n N m O Z X z m m AVENUE m 162NA l / m m A�9 [F cn m W 163RD AVE m SE w s = 164TH AVENUE • �' w m rn Y 164TH AVENUE ,CE SOUTHEAST SOUTHEAST- m j � yo � ; acr.-M-•.c o��r I .. =ice � ' 1 � i 0•r •IFS rFli6� w �+ it 3 IIf� w • 9 ;� 901009C7 x µ r us s<tY IS rm Ib . �srM is aoruM M 4 KC. 54 .1 A= w D" a lly: so wx Accm—R ULUTRUMM. eaars- ��wriw A►r) — 130 S'E. 1 38TFL Y' Scs-sue 87-40-T.1 w• — — 1t .7A I73 .sr.i� w S.E. 136TF ST. 1 !. 'r x x r• .. s j�J• v/ ,4!;SEsse9S MAPS SCALE: tf=.TDB EXHIBIT E ��fry 1 �rl.f, � c r�>rtlli•, # Y 1423DS9112. In- =OiN 3�s4sool� 3WAMM35 366R300127 366AW141 PAIL 1423059M f.* County Baundary . 'Al streets Patw' lrKrwporated Area Foh aid EMM qo C Vw5defa t+tOVAUtc SRO Stream cum 1 [�s2Prrentivr l�aes29Kmocid Ltreiae� &isaaa6le 11ljartegemant Deragrta�€1n �RIX-A ®UdM r �MN Print 14WSDO TO 1467SODM ® legend ur�.rt ® lakes and Large furs ® � f-loedway FEMA Modptain rX � ,lYLf;QQranneltlbgxatioti Hazard Aaaas f+r47F1EEAATE o�m ® Sate Source AgUiler SAO VAftid ® $AO LaCAS de SAO Cnet V,, ® SAO SAO EMboo Senate Area t kfim on Tdla :: 1457500M IAS7500040 I1457SM12T 14676MM USTSM13S Landssde Hazard Oramage Arw 0 rya t �xH�a�rF SfM9/77UE AREAS 1Vf'AYHATI01!! The information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. ng County makes no representations or warranties, express or implied, as to accuracy. completeness, timeliness, or rights to the use of such nformadon. Krng County shall not be liable for any general, special, indireM incidental, or oonsequential damages inducing, but not limited to, ost revenues or lost profits resulting from the use or misuse of the information contained on this map, Any sale of iht map or information on is ma is prohibited except�%written permission of 113n Coun _ r i-. rvinw i rtS ['.enter t {stews I Services i Comments J Search EX141-51r G SwM D1 j1Siotl D)2A1NAGE InvvESr/GA'TloJv 1Nra2,A-jA-nwf muamaty WdvmdLtd asumm rftm -urbtm t C 11 1 SMM* mwm _ i2rmw 7:36s8 AM � m Typo$ acm�,� at Prs Duets itruptp 1974-00% C RIPW 15ns JONES RD ROCKSIUIKE115219 JONES RDICEDAR RIV 657A4 1974-0096 C RIPRAP 15224 JONES RD ROCKIDIKEIJONES RDICEOAR RIVER 657A4 1974-0103 C 1501 JONES RD SE WIO BACKFILIIJONES RE) 657A4 1974-0105 c DRNG 15005 JONES RD DITCHIALONG CEDAR 657A4 1976-0128 C FLDG 16418 SE 145TH ST STORM SEWERSIBRIARWOOD S 6ST84 1976-0084 C 156TH PL SEIJOWS RD DAMAGE ALONG RDICEDAR RIVER AREA 657A4 1976-0091 C DEBR1 15463 SE JOKES RD CEDAR RIVER 657A4 19794)090 C DRNG 14406 162ND AV SE 65763 1980-0117 C DRNG 13405 158'TH AVE SE 657A2 1951-0316 C 15035 SE JONES RD DIKE JETTYICEDAR RIVER 657A4 1%2.0520 C FLDG M12 160TH AVE SE 6S702 IW2.0521 C "G 16426 SE 145TH PL BRIARWOOD AREA 6STB4 IS&i-0357 C ORNG 14827 SE JONES RD CHNL OVERFLOfMADSEN CRK 657A4 1983-0386 C DRNG 15243 SE 132HO ST ORNG DtTCHISE 132ND ST1152ND AVE SE 657A2 _ 1983-=7 C FLOG ' 14063 171ST AVE SE BRIARWOOO AREA 65M 1984-0224 C FLI)G 16211 SE 145TH ST 65764 1985.0710 E FILL 15035 SE JONES RD KG CTY NOT RESP-WILL mAENF 657A4 198&-W72 C VIOLATE 15817 SE JONES RD MOBILE HOME IN FLOOD PLAIN 657A4 1986.0372 E ILL DVLT 15817 SE JONES RD TO BALD FOR CM(CHK STAT BY CMDT}_ 657A4 1986-0378 C FLDG 13129 160TH AVE SE BLOCKED DITCH 657B2 19864)437 C CULVERT 15252 SE ' 142ND PL INSTALLATION -NEED CS 657A3 19864)6S1 C FILLING 15045 SE JONES RD SEE86-0745,1i58 657A4 198"745 C- FILL 15045 SE JONES RD ILLEGAL Flit -CEDAR RIVER 657A4 1986.0812 C EROSION 15421 SE JONES RD CEDAR RIVER 657A4 i986-1158 C FLDG 15059 SE JONES RD SEE: 8&0745 BRAMBL ETT 86-0745 657A4 1987-0430 C TRFO TO SWM-FMIRD DRNG. 657B2 19R7-0430 ER OHISWM DIV PLY. 657B2 i987-0430 NDA OHfSWM ON PLY. 657B2 1987-0496 C DRNG 16423 SE 135TH ST SEEPAGE 65782 1987.0549 C SEE 87-0430 WILSON. 657S2 1987-0593 C ORNG 16904 SE 136TH ST DRNG ESMT WATEWDITCH NEWS MAINT 65782 1987-I001 X FILL 16861 SE JONES RD ILLEGAL FILL IN FLDPLAIN 65734 1988-0377 C DRNG 14250 161STAVE SE HAZARDOUS POND OHITOCM. 061IW89 657B3 1989.0020 C FILL 13400 168TH AVE SE NEAR DRNG CHNL 657B2 1989 0086 C DRNG 14M 154TH PL SE INSTALLING DRAINAGE 657A4 1989-0863 C DRNG 1=4 168TH AVE SE DITCH CLEANING&OSING YARD 65762 1989-0867 CL DRNG 13802 160TH AVE SE CLO12735 DUEAPRIL 6M2 Page L of 4 �� iy� c1 FIB ! of Rs". J SC C8 nm pLQ 1990-0318 c FLDG 15225 SE JONES RD DIVERTED DITCHISTORMa EVENT WA4 19904DK9 C • DRNG 14943 SE JONES RD DEBES IN CREEKISTORM EVERT 657A4 1990-0518 CL FLDG 15225 SE JONES RD CLIN2839 657AA 1990-0590 C DRNG 14933 SE JOKES RD BACKUP OITO MADS♦ N CR69=ORM SS7A4 199040702 CL FLDG 15059 SE JONES RD CL 212933 SEE TULLY DUE AUGUST 657A4 19904748 M FLOG 15023 SE JOKES RD CL M2889 SEE TULLY DUE AUGUST 6WA4 19900M CL FLOG 15035 SE JONES RD WASHE DOUT DRIVEWAYICI>R13019 SEE 657A4 1990-0931 C ORNG 16423 SE 135TH ST SWAMP IN NEXT LOT13TORLI 657a2 19904YJ56 CL FLDG 15226 SE JONES RD MUD FROM CLOGGED CULVERTXL81313 667A4 1990.1023 C ORNG 15408 SE JONES RD HOUSE MOVED IN NEAR CEDAR RTVicR 657A4 1990-1101 C EA5BMi 16516 SE 149TH ST ON LOT BUILD ADDITION 657114 1990-1101 E EASEMENT 16516 SE 149TH-ST MET ON SITE WILL SUBMIT PROFAOSW S 65784 1990-12M C DRNG 149M IfiSTH PL SE ONTO DAN AT CUL DE SAC 65784 1990-1343 C ORNG 14920 163RD CT SE DAMAGED PVT DRAIN 657B4' ' 1990-15M C DRNG 15025 SSGTH PL SE PIPE OUTFALL TO RIVER 657M 1990-15M C EROSION 14250 154TH PLACE SE CULVERT DAMAGE AND SLIDE IN RAVINE 657M 1990-1542 C FLDG 1640 SE JONES RD WATER OVER ROADWAYlCWT OF BANKS 657B4 1990-IM C EROSION 15633 SE JONES RD OF RIVERBANK/FAILE.D LEVEE 657A4 1990-1673 C EROSION 14908 SE JONES RD CEDAR RIVER BANK . 657A4 1990-1684 C EROSION 17055 'SE JONES RD REPAIR OF DIKE OF RIVER 657B4 1991-0064 C FLDG 16426 SE 145TH R/D PL iIGGEDM DRAINAGE 65794 1991-0064 SR FLDG 16425 SE 145TH RQST FMADD TO OLOSPOFF 65784 1991.0188 C DRNG 16400 SE 143RD PLACE BROKEN PIPE 657M 1991-0188 E DRNG 143RD SE 164TH AVE SE BROKEN PIPE 657M 1991-0322 C FLDG 16418 SE 14SM ST PLUGGED PVT DRAIN 65784 1991-0422 C DRNG 16448 SE JOKES RD ROCKS AND DEBRIS FROM RAVINE 657B4 1991-0422 SR ORNG 16448 SE JONES RD OHfRDRNGCM QS111I91 SEE 91-0530 65784 1991-OWO C DRNG .15243 SE 132ND ST BACKYARD IS UNUSABLE 657A2 1991-0750 C FILL 13008 IWTH AVE SE W DRAINAGE AREA 657A2 1991-0954 C FLOODING 15606 SE 143RD ST STORM EVENT C/B OVERFLOW 657A3 1991-IODD C DRAINAGE 13535 16DTH AVE SE MMWNTAINENCE OF LNiOPEN R-O.W- DTTC W92 1991-1147 C DRAINAGE 14506 165TH AVE SE WATER PONOING IN ROAD 657B4 1992-0082 c DRAINAGE M17 162ND SE 65M 1992.0082 E DRAINAGE M17 162ND SE 65M 1992-0082 ER DRAINAGE 12817 162ND ' SE (Ir9AcByCmDt} 65M 1992-0082 PN DRAINAGE 12817 16MD SE 66702 1993.0252 C DRNG 16410 SE 143RD PLACE TURNED TO E 65M 199343252 E ORNG 16410 SE 143RD PLACE CHECK STAT BY CMDT DATE 65783 1993-OSZi C DRAINAGE 13301 SE LOTH PLACE BROKEN WATER LINE 65M 19934D528 C DRAINAGE 13301 SE 160TH PLACE SEE 93-0521 657B2 Page 2 0[ 4 T�p ivp of Pt> A[SlassuT F1tr T fb= Pry 1993-0724 C FLDG 13516 164THAVE SE FLOODING 65782 1993-0724 RN FLDG M16 164TH AVE SE FLOODING IN WETLAND ON PROPERTY 657132 199a-6752 i Q;, uiiirl.=iW, 16665 Se JONES RG+ 65784 1993-0752 WQE DUMPING 16861 SE JONES RD SEDIMENT FROM WELL DRILLING 651B4 1993-1043 C HOLE 16519 SE 149TN ST HOLE IN ROAD SHOULDER 657114 1994-0326 C DING 13200 1156TF1 AVEY RD SE NEW UPSTREAM CONSTRUCTION - WILL 657A2 1994-OSU C HAZARD 16519 SE 149TH ST NEW KC DITCH IN YARD IS A HAZARD 6S7154 1994-1011 C ORNG SE i32ND 3 ISM A SE DIRECT DISCHARGE FROM PLAT DEVELO 657A2 ' 1995-0107 C CULVERT? 15841 SE 138TH PL POSSIBLE GROUNDWATER IMPACT TO S 657a3 19950715 C RUNOFF ' 164XX SE 135M ST ROAD CULVERT DISCHARGE MIST DRNG 65782 1995.0907 C DRAINAGE 13100 164TH AVE SE LACK OF CONVEYANCE IN UNOPENED Rl 657B2 1995-0%7 R DRAINAGE' 13100 164TH AVE SE LACK OF CONVEYANCE IN UNOPENED Rl 6S702 1995,1070 C CREEK 15915 SE 148TH ST STREAM FLOW INFO REQUEST 657B4 1996.0039 C DRNG 156D9 SE i287H ST NO INFORMATION AVAILABLE 65782 1996-0289 C FLOG IS225 162ND AVE SE GROUNDWATER STREAM IMPACT PVT PR 657B4 1996-0289 R FLDG 15225 162ND AVE SE GROUNDWATER STREAM IMPACT PVT PR 657B4 1996 0376 CD SEEPAGE 15225 162NO AVE SE SEE 9"289 DUP 657B4 1996-0556 C RUNOFF 14301 166TH PL SE APPARENT GROUNDWATER SURFACING 65M 1996-415% R RUNOFF 14301 166TH PL SE APPARENT GROUNDWATER SURFACING 65M 1996-4D669 C FLDG 15035 SE JONES RD HIGH FLOW PONDING PVT PROP NO OUT 657A4 1996-0849 NDA FLDG 15035 SE J6NES RD HIGH FLOW PONDING PVT PROP NO OUT 657A4 _ 199&086.9 R FLOG 15035 SE JONES RD HIGH FLOW PONDING PVT PROP NO OUT 657A4 1996-0570 C RID POND i5)= SE 143RD ST KIDS USING POND FOR DIRT BIKES 657A3 1996-1050 CL FLOG 15010 1 %TH PL SE REIMBURSMENT FOR CLEAN UP WORK IN 657A4 1996-1253 C DRNGIPIP 15226 162ND AVE SE PVT DRNG INSTALLATION IMPACT ROAD? 657E34 1996-12S3 NDA DRNGfPIP 1SZ26 162NO AVE SE PVT DRNG INSTALLATION IMPACT ROAD? 6S7B4 1996-12S3 R DRNGIPIP 15226 162ND AVE SE PVT DRNG INSTALLATION IMPACT ROAD? 657B4 1996-15S7 WOA CONSULT 1=3 156TH AVE SE BCW SITE CONSULTATION 657A2 1996-1724 C FLDG 14206 164TH AVE SE OFFSITE FLOW IMPACTING PVT PROP 65783 1996.1762 C FLDG 15059 SE JONES RD DAMAGE TO DRNG OUTFALL TO CEDAR R 657A4 1997-0056 C DITCH 13215 154TH AVE SE 657A2 1997-0056 R DITCH 13215 . 154TH AVE SE 657A2 1997-0203 C FLDG 14028 160TH AVE; SE OVERFLOW FROM OJW CULV IMPACT PVT 65M 1997-0206 C FLOG 16046 SE 142ND PL OFFSITE FLOW IMPACTING PRIVATE PRO 657B3 1997-0206 NDA FLOG 16046 SE 142NO PL OFFSITE FLOW IMPACTING PRIVATE PRO 65M ve 1997-0206 R FL.DG 16046 SE 142ND PL OFFSITE FLOW IMPACTING PRIVATE PRO 657B3 1997-0318 CL CLAIM 14038 56TH AVE SE FLOODING DUE TO PLUGGED CULVERT 657A3 1997-0423 CL FLOG W28 160TH AVE SE ROADSIDE DITCH OVERFLOW-160TH AVE 65783 A ! � 1997-0484• C DRAINAGE 15701 138TH PL SE PROPERTY DEV CONCERNS PVT DRNG 657A3 1997.0524 C EROSION 14631 156TH AVE SE NATURAL SLIDE AREA ADJACENT TO PIP 657A4 Page 3do ltrw Psi 1997-WW FCR VANDALtS 167TH PL SEA SE 141TH VANQALISM TO RID t4ENTWICATTON SIGN 65M 1 T-W17 FCR DRN POND 145TH SE PL STWN 150&151 PL NEIGH KIDS DIGGING IN POND SIDE SLOP 657A3 1997-1072 C STUIAPS 15405 SE ,JONES RD STUMPS STOCKPILED FOR CO PROJECT 657A4 1997-1432 C DRAINAGE 15413 SE 133RD ST LOT DRAINAGE PVT DRNG SYS CS Lows: 657A2 1997-1493 FCR POND 16426 SE 145TH ST INFILTRATION POND NOT kVWDLJNG LAR 657B4 199"IS2 C DRAWAGE 13115 158TH AVE SE PVT PROPERTY LMPACT DUE TO NTRL DR 657B2 1998-0192 FM WASTE 15006 SE 145TH PL DOG WASTE SIGN REQUESTED 657A3 19964DM C DRAINAGE 44312 160TH AVE SE LOW AREA PVT PROP ADJ PROP RAISED 65M 19964= C TREFS 14232 150TH PL SE TREE FALL DAM FENCE. NOT t DSU FACT 657A3. 1998.0475 WOC ALGAE `16713 SE JONES RD ALGAE RELEASE FROM FISH POND 657B4 19954X75 WOR ALGAE 16713 SE JOKES RD ALGAE RELEASE FROM FLSH POND 65794 19954)931 WOC FILL 12813 163RD AVE SE DUW PM OF CDL ADJ TO DRARJAGE SYS 65m 1999-0059 CL TREE 14334 166TH PL SE TREE FALL DAMAGED FENCE 657B3 1999-0225 WOC DUMPING 15921 SE 14M ST DUMPING ON PVT PROP YARD WASTEOE 55784 1999-0297 FCR RD MAINT 15006 SE 145TH PL REQUEST TO RSACE BOLLARpS AND L 657A4. 20004)= WOC WOI 13612 160TH AVE SE APPARENT IRON OXIDE BACTERIA IN DIS 657B2 2000-0666 FCR MNM 163XX SE 145TH ST REQl1EST TO 94STALL ADOITIONAL TRAS 65784 20004674 FCR MUG 16225 SE 145TH ST DUMPING,ISTOCI PM24G OF LUL93ER ON 657B4 20004)674 R %bAr- 16225 SE 145TH ST DUMPtNQfSTOCXPtLtNG OF LUMBER ON 657B4 22000-0703 FCR W0A 16225 SE 145TH ST CB VOE5 NOT HAVE LOGJVNG LID. FENC 657B4 2000-0731 FCR M MGs 14210 14M PL SE OEVLEOpMdea WITHIN THE CITY OF REN 657A3 2000-0731 WOE WOO 14210 14M PL SE . DEVLEOPUENT WMAN THE CITY OF REN GS7A3 200"731 WOR MASIG 14210 149TH PL SE: DEVLEOPMENT WITHIN THE CITY OF REN 657A3 P"a4d4 DRAINAGE COMPLAINTS SUMMARY: 1. Complaint Number: 2000-0322 and 1982-0520 Address: 13612 160"' Ave. SE Description: Complaint 2000-0322 was a water quality complaint. Problem could not be identified; therefore the County closed the file. Complaint 1982-0520 was file in 1982 and involves flooding of the property. 2. Complaint Number: 1989-0867 Address: 13802 160"' Ave. SE Description: Was not available. Complaint may be too old and may already have been addressed. 3. Complaint Number: CAR No. 99-004152 and CAR No. 01-005339 Address: 13814 160"' Ave. SE Description: Complaints indicated that the ditch in front of the property has plugged. King county responded by cleaning the ditch. The property owner indicated that the ditch along the west side of 160"' Avenue SE floods. When flooding occurs, water crosses onto his property. 4. Complaint Number: 1997-0203, 1997-0423 and Claim Nos. 31249 & 21860 Address: 14028 16& Ave. SE Description: Complaint 1997-0423 is not available. Complaints 97-203 and Claim No_ 21860 were filed by the previous owner Mr. Marshall Brenden. Claim No. 31249 was filed by the current owner Mr. Chad Myers. All the complaints involve failure of the drainage system and flooding of the property, which includes flooding of the lower level of the house. Problem appears to have not yet been resolved. 5. Complaint. Number: 1997-206 Address: 16046 SE 142"� PL. Description: Off -site flows impacting property. Property gets flooded and septic system operation impacted. Although Drainage Investigation Report does not indicate any actions were taken at the time of the complaint, it appears that the County has installed an 18-inch diameter pipe behind pipe behind his property. There is still a problem with erosion downstream from the 18-inch pipe. SAN.24.2003 4:15PM KC WLRD NO.222 P.2/6 V%XNQA9QMqTY WA.l<TER AAi1;? LAND E,S"OURCES DIVISIUN DRAINAGE LNvEs,uGABTxoN REPoR ' INWMGAT ION REQUEST PROBLEM: ' • ,V c� ' is-< 9'rGl'f�1.i, yp Received'from7�.�,��j' �'�. ap�-'9?�3 � ' .' � : •� �� ' -' - �.• . {Day}(>?vo) NAME: - NONE t ADDRFSs: _''. ft t�j Ala, ?T �� S ~City State Zip LOCATION OF PROBLEM, IF DWFEREN1T: Access)Per►nissl rutted fall First (Would Li la To' Be Pre x Plat name; (�� ��/ 4� d�� ram., Lot No: Block No;J Other agencies involved: 1/4 S T - R ParcetNol'15760�/i5?6Kmll TLBros: New Z Basin Couneil District 17 _ Charg e No. RESPONSE: Citizon notified an 41400 to 'by. T phone —letter m arsoAT WAS DisrOS N: 7ulrnto an R o or action recommended because,; 5� Lead agency has been notified: Probierri l< been cosrectetl, Na pmblem.has been identified. Prior •instigation addrasse9 ptoblern:' —T . . —'S Privat4 problem - NDAF,*ill not cond}'der be�asex ` ' Water originates ansite and/or. on #Sli*ing'pircel..'' 'Logation is outside VLRi Ares. •: ..I �Qther (Spaoify); 4 ' w 4..' DATE CLOSED: 1 ! 83! ` JAH.24.2003 4:15RM KC 1LRD N0.222 P.3i6 Complaint No. QO — 0322 Nance: Jeff Kctehel M Investigated by: Virgil Pacampara Date: May 16, 0000 DETAILS OF INVESTIGATION: I met with Mr. Craig Geller (resident) at 2:30 PM regarding a water 4uality complaint. He informed me that be has no idea where the pipe has originated, its source of flow and notice the discharge two months ago. He been living in that house for sev;n months only. The subject of complaints a 6" dia., white colored PVC pipe discharging an orange colored liquid The exposed end -part (out fall) of pipe line is located at side ditch of 160th Ave. SE. approx. 40 feet North from the SW corner of the property. Using the end of pipe as reference point (refer to photo # 1,2, 3). It seems it was been laid laterally at an angle towards the house in north-easterly direction and buried in varying depth of V to 2' feet. At time of visit, I tools a water sample froiu out fall (end of pipe). It is discharging clear/ colorless liquid (refer to photo # 5:6). Noted a constant flow of discharge in the whole duration of visit. Stained area is still visible (refer to photo #4, 5,7). No trace of re=t beck fill / excavations almg the probable route of PVC pipe due to presence of 'debris and yard waste scattered all over the property. Notice the south side of the small garage, a stock pile of used / remnants of varying size of PVC pipe including en identical size and color of pipe mentioned in the complaint (he informed me that it was materials use at his other work as a plumber). Checked' water meter for possible leak in water supply of the house, (noted water meter gage is not running despite a constant discharge of lisluid/ water in out fall). He added that a septic tank is serving his sewerage system and a drain field located at backyard. The roof downspout is not connected to any storm drainpipe, will create a surface tun off in the area (refer to photo -48). 'Water sample taken from the pipe reveals Category #A; variety of iron -related bacteria and Category #5; Iron -related bacteria plus anaerobic 8t aerobic slime - forming bacteria $292 on ads or" MIF V% . drainage pipe (buried) Pappas Pratt V47olberg 416009 #1(i01 #16021 i Property line driveway #13612 Drain field Water Old garage meter f •• 1 Old trailer .'�+ debris Stock pile of pipes f ---.7 (used 1 remnants) ditch o►7 l Garage faucet C Out fall ! End of vitae ' Probableroute cf Property line Stained 6" dia. PVC pip+s area JAN.29.2003 12:10PM KC WLRD h10,339 P.12i13 p(� ��rr [� ��qq ®pp p� pp Mn M f \ Yw � - DEPARVACIT OF [t•UDLIC �► 0 afts DIVISION NO- - BATE: 75- �d$ � LoOdlN Complaint Rec d NATURE OF COMPLAINT: G RodiD ❑ Citizen ❑ LOCATION: 136 Z d Aa6 Phone On -view Cl COMPLAINANT: � IQty S�,OWAit r ADDRESS 13 6 ! Z - C6o 40,r SC' PHONE: 7 7 Z- 6 3 q,c Details of Complaint: !' 57cklA�er S Piz OPEitrY 3 ,°ti(, �GDor��d. 6moo C�90 Atia MAUL 7vc I� lift ro CA G 4 SL(J/�. LC%Hd 7 CAN 'RC D o iu E Complaint Received BY: /�,;� Gal Complaint Referred To:l O,(,,eC el?AZ-1E9 Date: The Stewart property is naturally low,lying approx. 4 feet below the ACTION TAKEN: surrounding propert which is County roads .and other private propertyy ;he road and its culverts have been in existence for well beyond 7 ears. I don t :eel we should do any work,expending public funds to improve private property. fr. Stewart could install a French drain,collect any water that enters his ppropez ..nd discharge from the french drain into the roadside ditchn along 160th M.S.E. he discharge would have to be controlled so that it was not much more than a trl .n-order to assure that the ditch can handle it, and that we also do not create 2 +roblems elsewhere. Stewart told me he ants County to channel the drainages along Compiainom advised of Action possible c ; -Phone � Letter ❑ Penonol Contact C) x l �"p .he roads and not onto ? Q44 oveep+cte ak Complaint Action Handled By �i rei d of (a s show Natural drainage =inage'. °" P► C.41,0vt tL+a4- 'it%s .e oss his property. Established a p►-obl ew RETAIN PINK CAkBON: END YELLOW AND WHITEgFGR RD. (41. _tke cde�yl -y /raw- JAN.29.2003 12:10PM KC WLRD 1 6 0 A V S E � � � �.E. i.�btin ►ti.�tx£e'L OPEN DITCH 13612 STEWART T — -- — -- PROPERTY N0.339 P.13/13 olI`,' !r l I i OPEN DITCH 1 6 2 A v S E .u/ CLI LULP4 V f .all l'M Luu_- Ki,nQ Cpuntt ®epartmentpf Transpoiltaflckn Cifizew Action Request Form Request taken via: P (P)hone (R)adiD (0)n-View Max By: MCDONALD Caller Name: BOWDEN. BRET CallerAddress: 160 AV SE @13814 Location: 160 AV SE @13814 Request Detafs: CLEAN DITCH Request forwarded to. PU 004 DN: 4 Dispatched to: Above fts lames kw Of% Use Initial Investigation by: CAMPBELL Findings Action Taken. SLOPE MOWED Task -Completed: 262 Referd to: Responding Pik: SUMMIT Second Investigation by: Action Taken: %�AACE4. tVO. /VS75000? , Task Co:npigted: Contact Log: 110/6/99 PM CONTACTED CITIZEN Callen Contacted by: Type of Request Choices A RbwxkmodlCom9. Vehkce B. lltrTdy fncQeation C. cayw ctfoveflay issues D. Drarrrage E. Debris on Roadymy F. FloodN Prq,>ertY Request N 99-0"152 Request Date: 1 9 Requestii ne: 900 Day Phone: (425)255-6152 Other: tc5t�up L Time Reid: Betorathts mm for Held use Rey. Type: D Investggatkm Date: 10J0511999 RPU or Work Scheduled: ! Date Refs: Request Type: Date RecVd: Date Closed: 0$123/2000 (P) Phone (1) In person (N) Note or letter (U) Unabfe to contact . G_ f FehCe Damage M. 11agw use of W W W. Spii Ck-xV (General) N. Shoulder Maintenance 1. Lnqukies RE: Maint Activdies O_ Misr- Requests S. Spray Appkdtiort P. pothole K Washout Re6aidSfide, Reffbftzf 0. S+deloakr_urb Maim L Vegetation Conhal (Mow, Brush, et(;.) - R. Repair StreeWaving S. Sbeet kftin./Sweep T. TrastULilter on AM U.sram%g V. Water on Road/Fiooc*V W. Lid UW" (CB UW-) X. Dlkrhirrg Y. Bridge Issues County DepaMment of Tm�portaoon Citizen Action Request FoQm Request taken via: P (P)hone - (R)adio (0)n View (F)ax By: GALLARDO Caller Name: t lOWpEN, FRET CallerAddr+ess: 160AV SE @_138i4 PAXCEZ No, /VS7500094 Location: 160 AV SE R1.3814 Request Details: DRAINAGE DFTCH PLUGGED Request forwarded to: PU 004 DIV: 4 Dispatched to:;RONIN Time ReTdy633 Abo" this Kno Tar chyke Use Initial Investigation by: CRONIN Req. Type: D Findings Action Taken: VACTORED & FLUSHED SYSTEM Request N Request Date:01-005339 Request Time: 1633 Day Phone: (425)793-7783 Other: Bekm this IUm for Field Use Investigation Date: 12113=01 Task Completed: 241 Refer d to: RPU or Work Scheduled: Responding Pit: SUMMIT Date Refs: Second Investigation by: Date Rec%rd: Action Taken: Task Completed: Request Type: Contact Log: Date Closed: 12H412001 Caller Contacted by_ U (P) Phone (1) In person (N) Note or letter (U) Unable to contact Type of Request Choices A Vehide G. Guardra+llFence Dai age M. Iwo Use or R!W B. UT4y knPeClion H- Sp7 Cleanup (General) M Shoulder Mainweance C. ContradA>meriay issues 1. W gtrbles RF: Maint Activities d. Misc. Requests D. Drainage I Spray Application P. Pothole E. Debris an Roadway K. Washout Repaitl8tide Removal a SdevqOdCurb Maim F. FkKxrFug Properly L Vegetation Co trol (Mow, Bnish, etc.) R. Repair sueet/Paving S- SUMI Matri-MO V T. TraS Airier on AjW U. Snowflce V. Water on Roa&Fkxodmg W- Lid uhsing (C►8 UOL) X. Ditrhir%g Y. Bridge lss 3AN.24.2003 4:15PM KC WI_RD M0.222 P.4i6 KING COUNTY SURFACE WATER MANAGEMENT DIVISION MANAGE RTESTIGATIQN REPORT - page t: 1111VE6'I'IGATION'FtEQ11EST Type ,,- Received by Date; 9 OICd by. Flte'No. 9 - Recafved From: (Please prin{pIA14 for kenning). Location of problem, If different: ' Pay)) (Eve] a PHONE / / / Q c2- �e State ZJp Reported Pmbfem: 41 ry --- Flat -name; if ece 1. fltr(- Lj pGr� T,�S Lot No: .$-' Block No: •3 Dther ageneles involved: -No.Fleid Investigation Needed • oRtvds? 3. . _ J Parcel Noj#_- - %S" Qi ! ��. ftq I/ Th.Bros: JSgw L'D. Z 1j4 S T R Old 6F BaslnCouncil Dist% . cNarge No: RESPONSE: Citizen notMed on " 1 97 by A/ pho�fn/e _ letter _ In person�,�//__ �} / }} +4'�1A.LS L '/K 7i�!L`C! C f„r'. r.0J . A"� �I�t•t t...s1.nG1�/�,l.GG/td I �-U•lrx... Y.Ur UU QO .�Ce wK� 'R"'�`t" "E" !• f,'_D��`C . � ��.e•r..r.e z fir .�-� '� DISPOSfT ON, Turned to ' on by OR: No further action recommended b+ Lead agency has been notified: Problem has been corrected. No problem has been Identfied. Prior Investigation addresses pr See Fie o Private problem - NDAP will not consider because: Water originates onsite and/or on neighboring parcel Location rls outside SWM Servl •Area Other (Specify): DATE CLOSED: l I��. JAN.24.2003' 4:16PM KC WL-RD N0.222 P.5/6 AM&U. 14028- Jiirw"S#P.d y b ?ou'qI/IW dfk ManUH BrmdkM Wt W —�A at the 2�tm mfciiamd address in 1991 This is the fka Lnddent of iq. iR;MiCUq , -- flooding in the hain . 4 sib bcmo,.'cd in. howow, -cfm cc FRONO. 97-M for bj9oflc:U6odIn9.iU the 13�ighbcAw�&- -'T%i drafli ditch hommIly in the past years bandlo* Mrfam water flow Ouing storm evwt�, by, ft,wrfim Br=L4='9'A'd. 'The &W aMm= of B=dw's tome is sbdlojw�*U= OMMP ditch bottom d CIOVE40n. Themii 4'M" so 4rii.-nlww aato the gamSe entrance that ig'io� We30fte rMeif [o* but i�cixst tiro thF basement floor a tl*Mc& ne a0m ditch i6medinia '" -AC of LOP".& M AWbich reduce—, volume. Also, the ftjj cpncrntr� by combinM— bath e sides of 160 Arc S$; Pa ' his bopt B=Wonwants potential JIoOftioeNi'. be clirniiiatcd The ftigqt6q of i�q�" &'-C*6AL�;A dopu bis drive toward W gar &Mp and bas=Mmt to % Age and bxsemM Is high but the star* drain'iAaent to, tie rk vd is leas fitq=tly ovexwhoverwhelmed.Bmdon said" L" 160- MM. S.E. �i� e' q Wet area reduq*4 by sedimimt an gravel bd&i'4p Storm drain .. i .. ............ % .................... ................... ........ . ............ Sfimding Water Sptliace Water DisrWges td OpeA Land, ............... . . . ....... . ...................... JAN.24.2003 4:16PM KC WLRD alCounty suelate wale? manalament Emyong Ikes dawn&sam Engineering & Environmental Services f 4rZM3 Chk Rev Date Date &fo J-7 P7� NO. 222 P. 6/6 ........................................ awptof L/ kcp� KING-COU NTY,O-WASHINGTON- CLAIM t DAMAGES S CD 0 NOT(Cli' No darnages.can be -paid by King County, unless a clam corrtptytngzvith Washington State Law is p,resenled to the King County Council. After firing clairn; please. direct. all -questions to the Office of =cissk Mfanagc. n ert at, (206) 296 7432 INSTRUCTIONS: 1)Complete toms, 911viN speCilic details about your damzige or loss. .include dates: tunes and witnesses. 2)Sign and have tr',e form not2rized.'3)Return'iofm 1.6 King County.Clerk o; the Ccur6, Rocco 403. King C<x n,f Courthouse, Seattle, AA. 0-8104. arJ'4f/! middle, lest W fig: 9r.eNd ei✓-, _-jx. ius'snesS name) p ADDRESS r� Q�Jc.. 1 'G# 1, . S. FT. _ Z 1/1 ! (home or bu sln ss) Inctude cry, sraro and zIP )ME8taSlty S 'HoMESSAGE N �)ar7� PHME: PHo,\ �cC)�?a d't�v/ Pi -iota: ADDRESS SIX MOB! i HS o=—FORE LOSSIACCIrDE OCCJRRED•^ I41a y0 Includo DA T E Q= ACCIDENT �TIME aF ACCIDENT �� ' �' AN.0UN T CLAIt aED S1�� ��-- LOCATION' LOSSFACOiD=WF l7_o Z. a' /�4 �' E" e •y_7 DESCR;F--Tl0N AILS (Describe how the losshncident occurred): KING COUNri Y'S IN`VOLVEMENT (if possible, i, WITNESSES (Please give phone numbers and it Af—rdn i-7/09 the employee or department ir>v i4 heO fT3 •i _ a r srP.t I..,fA 7 S� C .2 l0 c PROPERTY DAMAGE (?lease describe the value and e)Gent of damage to your home, autornobite, or persona'. prope ry. Attach estimates, bills or whatever (jocumentation of dar)ades you _-nTV nave):- -- i ' IN IURY (lf y=- were int,_-red, please dS9Qrihe in hill): I' ldiant=l'yj phvsician(s) Or any pother medical professional(s) involved: )Are you still receiving nediCzI treatment?: • _ _ and accurate 8ighatuh cf Claimant" .an7 SUN3�Rr8ED Al�3D SJrQRN jp *E THIS _ pAy OF , Notify �c in and t Nr of VV&.Vx r�l� .—�,.......... .- ins-t.'"^ ...r= ..r ..; •e�ti"r'.''.:'!Yi:F��.:.'::v4?«'Ly?^,„^`�,es�'S'..�t!^ �t.^+..�..�v-�l.T,:.+,�;-:.�x�:r-+^r,��+rsnw�.M�..,. �,r. ........ PROPERTY DAMAGE 35.00 Hair dryer 95:00 vacuum cleaner 950.00 Carpet and pad 150.00 Removal 600.00 Doll House 40.00 Dog bed 225.00 twoNintendos 100.00 Stereo cabinet 800.00 Hideabed 750.00 COUCh 350.00 Reci ier 250.00 Stereo speakers 200.00 coffee table 175_00 Picntte frames 185.00 Wicker chair 450.00 three doers at 150.00 each 100.00 Rug cleaner -rents I 50.00 Ru- fan rental -5 days S5,505.00*Toral Costs !,The total amount does not uzrlude hidden charges such as mildew ex water daenn�es td the ells or. . insulation. 13renden claim Attachment B, January l3; 1997 King County Involvement; King County Maintenance over a period of three months have hsen'cicanin& lining and otherwise improving -the drainage ditches on both sides of 160 Slr above my property. starting at'a pobit cram SE 1.300h street. These improvements and cleaning was extended to api*oximately 1--blo&l4orth of my property. This action caused the drainage 'water to be all diverted to the culvert at my property site rather than sotne waters be absorbed by properties above mine. Immediately North of my site the Count} and/or others diverted all waters draining on the West side�of 160 SE by the use of a culvert under the roadway to the East side of 160'$E thereby doubling the ivater•volume immediately above ntv home site. This action along with ditch improvements to the North and the'.aebris buildup in the, ditch next to my home caused an overflow of the culvert are$=and directly caused my'ttouse to be deluged with drainage -water. I believe the County erred in'improvin¢ the drainage areas above my site rather than below my site. 11%is left only my louse to eohtain the excess flow of water, , 1 have included photographs to help you better understand the County's negligence in this matter. Photo No. I Driveway at 13 915 160 SF -shows drain culvert and volume of water oil NV1=ST side of 160 SE Photo No. 2 17raimage and culvert WEST side of 160 SE Photo No. 3 Drainage of water in ditch on WEST side of 160 SE and the point where this drainage is directly closed off and routed to the EAST side of 160 SF and directly feeds this water through my culvert. Photo No. 4 Drainage on EAST side of 160 SE and immediately prior to canversirti of waters see Photo. No. 3- MAO No. 5 Draina;e ditch on EAST side where waters from both F-AST and NNT ST ditches were diverted by°the County directly above my residence. Photo No. 6 Drain culvert from W EST ditch to EAST ditch, Photo No- 7 EAST ditch directly North of my residence and after the conversion of both WEST and EAST drainage ditches into one drainage ditch. Photo No. 8 West side of 160 SF, ( across the street from my hotne). Although tl tmIs a culvert on the South Ilia culvert ends or is plugged before it meets the Grain waters on the WEST side of 160 SE- ; �i t��r;i" ♦ F f'r+aC � e �°- �y ft �`6 1'. -. a War tYp-. r ��.,, �� fit✓ r SL� . 3 '� l t � ! �' s r L,r.� '""'' �r r i f s F -, � r-�-\Y.y.� 'y�� �{ i +... �.� f� - • i" Ft i f4 tli, l 1r };"t tt7t 5 7 } Lti',y '1 , I/fie iry - r `• A _ yr, 4-_ ', rGoo t y � y r r"^•rs�'t 7y ,��:r. s �. � fL.; —rj � st, \ _ ;. � -F.: t js `',< Y Li•+ ' tier'' 7 4.r r t y-. �l -lid - -s y� R a at�`r t 'I_ r ,,.�`C r'r' p,' L �'•' �.' �i !'y �t f./ i _ a�-��r. �SS�r�. �" r s i�•`�1,f i0 � 7�j'fr/,! s f 'w' r y f �if'Ii h 1 .;' xi b � '��,. 1_ F a � Y � F,✓iyy �° it + {i 1 T 7 c • t H �; �: '�"'�' fRF-` ' `7 �,f �•• 3 1 -�"C 4 �. fw 1 �� Cj .. .� px �: may` r' s+. � �n � S� A?fit• ,k •i F �� } 3', � � } { � a �, � vy 1 � �'ta Ff i :,,ti.. ,fin• 75i,r w: Syr , 4 ?X,#.s F .: � r �., �� R i-k4� rat -, �. ,�'�t�3ro 1 L °- '� } f.� �• � /� ' �;►�t: �1��., t +�n'f Y �` ^� �v..l�`„'�i� r•.b< NO �p f{.-.f Wo r.' � i�"'�'T+R.!ti..w rev'A N� i� ^•.a _�.5� it "Y kR El I -:r et�prtd, 1 as F W j k; F" I�itR4 y3 ffw� 1 01 .Brenden claim Attachment A January, 18. )997 Description of details: (see attachment A) Loss resulted from approximately a foot or so -of water entering 11te gr'aiid fhiar area of my home at 14028 16tJ Avra�ue' SE and severe]} damaging or destr yina the Cositc nls of the living'area of my home. The water was the result of an overflow from the roadside ditches and its drainage culvert on 160 SE caused by 1. overgrowth of vegetation 2. debris iit the ditch immediately adjacent to rn►y home: and 3- excessi o alcr drainage routed to the ditch adjacent to my home_ by the County. l k �•e +' _ � 44 -ap '• _ '�e •... SiJ rr��7, 3'•' Y'1�� ,=r�� f, �! � 1. . "�' �' ��4' - �S; 1 1: a '0 ' � °;W, �� '�' "' �i T' r�7R, , I`•i Y r'y� k �)l S n . 1��' o L�� r . p aR off; r CC i o r�1 h § o a ' •r` L�eD .4 aY Ka �y4i$ yP7µ'i� ,� iyr'' J, •T�Ny, 4,kjo` � y�� E �_� '. : r mod; 4r� �. rhx� � b' � - • k. 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' � r Y a sr � ' ki �'i � - * �rf yrgro �y� �• �-� ' . %fie �::.r�' oa�JY'{ c '�'�, .. 1 a+ .. ���: �• _ _ �! �, .t`-r '`tl •0n9 y•iCi, o,,L��!17`i! t d, �•�Y o��R� ••.t'�E d{ '1 �� Jam, . r�},i. �,° 4� :,f' � ��';;i'^"�• k°.1A 1 r T•7y A ,rj'- +rre r ;i�i F',y eY''�$ ; V: Doi 71 CFO ~ � �° � pp N'� }W�.'7tian� r �', � ylK s f r . k 1 S•� �i, r� I� h'e 4 , � rA � f � � rf P �fJr'. �rr� , �Idi er {9 �a• � � .� t�. !� r� . �1�„.'. ;t' .1 , r 'j 'i J , r^' a .) i'• p�ali i� � >, rR .r " C �t ;dip s� � rirr�','r x' F � v. r�+�r r .-. ..., ._..... ...,.�.._._«....... ....,-�,�..�Kr. •: rrarzm'a•YN>Vnon,57fi^.11u'_,T:iY^..�'�!1�[�'J!Yif%C'S'1�f7.�S� � n . . •r .• • • , • ..•..+. _ - .. ... -n Ar.7'� Ell `v f'.� '�n.�'1+•ro r i t j,.Fr,+.u''`r ti'• • .'.�.��� t, �` •; 101,'3 � �+q•.; . . �- • a ' . 1� ' � ^�; � '� "� .'S.. • � 'fir p �;'� c pry �,�t1 �,., � � � � r�4� o: hiq rf El r tl. .L4* .,O• ,,� I G � � .'..f:. 1 ��7. ^��]ji ., ,' ,+rY . _ � .�•0 7 � '� .� ^;ai'� � "' ��� �, g�'�Y .�'��,. � F. bo � �i i'e ' .i�`+:. v,.4 �i �r•��-..:,. ,. w-n:+t^�.rar.+.?r^`s7:;7� ::s;: • ::�.�,.::Sr.r'i'i::7s;: �;�r:"l:arr.0 y ";Sx..;5'!�'r�.i�r:;?3;;.:.t;�:"•S�':'.'?l•Gr'9�!x;y.T,'.'.? ursiTaTf7vx�:-�'ca'e:�T,,.'r:�,.... w . ti— - ...... ..........._ ... .. September 11, 1998 TO: Karen Graran, Claims Officer, Office ofRis`:r Management FM: Harold S Phi, Manager, Road Services Division - - . --_ Thank you for your February 5, 1997 memorandum requesting comments and a recommendation " conceming the aiiove-referenced claim fled against King County. This claimant alleges damage to various pieces of personal property -due to King County Maintenance cleaning, piping and - - - - otherwise improving the drainage ditches on both sides of 160'° Avenue Southeast, above his property at #14028. This work caused the drainage water to be diverted to the culvert at his property site, rather than some waters to be absorbed by properties above his. The flooding incident reportedly occurred an December, 31; 1996, between 8:00-p,m. and 10:00 p.m. My staff has reviewed this claim and the findings are as follows: IncidentCuflannitLoalThe incident was confirmed by Road Services;. Maintenance Division Four personnel who responded the same day to a report of plugged drains. Staff did not located a plugged pipe, apparently'there was just too much water for the pipe. Also again on January 2, 1997 County forces observed one -foot plus of water in the Brcnden residence and a driveway culvert that could not handle the heavy flows. Damage Confirmation, King County employees did not assess damages to the property.- The claimant's property is located below the road with no provisions to address possible overflow of the roadside ditch. c the d t 1 recommend denying payment of Ns'clairn. Although King County has done ditch cleaning, some installation of drainage pipe and other. improvements to drainage ditches on 160" Avenue Southeast, this work was a considerable distance north of the claimant's property and none of these activities altered water flows. Staff did not confirm. the claimant's allegations of a plugged pipe inlet. There is an 18=inch diameter culvert pipe along the front of the Brenden property and there is no history of previous or subsequent problems at this site. Karen Graham September 11, 1998 Page Two Second Party Liability_ None. Staff report there was just too much water for the system to handle during the storm of December 31, 1996. The event included snow and ice melt concurrent with the rainfall. R{gmedia[ Actl= The drainage system on,160"' Avenue Southeast is being reevaluated for possible improvements, Hold Harmless Agreement None known. If you have any questions concerning these findings, please contact Field Engineer Bill O'Connor at 296-9147. HST-.1 TEO:le - ec: Roderick E. Matsuno, Maintenance Operations Manager Bill O'Connor, Field Engineer King county Road service DhIsh Depanment of Trans, Road Maintenance S, 155 Monroe Ave NE Renton. wA 98056 September 10, I! TO: Harold Tanil FR: Roderit k M, } F RE: ontrac C' Attached is Ch ng Contracting Comr Change does not n required because t building permit ap; space provided ar1t If you have any qu Cc: Kathy Broy t .Ion Cassidy DING COUN'",1tVASH�TO` ON ' C Fo-R (; s NOTICE: No daystgcx can be paid )iy King Ccurdy trrilmt a rlaiui'citsrrply;vg -with Nkmbi-� sl�se taiw is pres=tcd 'to the Cksk'oflu Courx:il. AAA .Filing CtAjux pic:Me dircd, all quasiom to the Oflko br%sk Mwiagcox-TA at (206) Z)C-7432. LNS"IRECTIONS: (1) Ccn pkte ror:ei &i` 5 qsw fi dcculs *bow 103CMZ Cuar9Y C1c kfff the COMM* 17ndsn R'•� 025. J�"1A� Cvia �e vz)q S lurks � • (�} Sim }Ix, f� (3) [si l�al,:;,r 14xir� Firif, dfidd1c. last riv busirreas rramc) - .wurzk 4-4 (:`Jc.•mcnr �bHsineas) (Y uv'q�PHO�;l571 � 111FSS.IGE . . ast )iO • D,17 E OF BTRT1i —7 711 .. socui, swuR1T'Y 1` umBER {Opu msJ):. ' Al]DRF-S5'SN j6101VMS 18 ,T itF C► ?�{ - Y��tTI� Of' INC D NT'. � 1' �`l ` Q 1 � � � ` f -m, In QF Il�C'IDIxr: j� � aR� � � � AMOII.W Cl 7trATED: S � `� � _ �3 i LOCAI1UN U1; L&NS NG'JDE,KT: llt:l',11t (d�csih~ Jrtrw ri,t icsc irsaident utc-rrtccla;1, }2�AJ1 i1 i 1 �Q� A,�.._.'Icbs~�UIZ-- iacv act, rwct L u_ fi Vi C: C OVIN7l"5 RiN VvYI:NESSB.S (pica--st frm (il pus�itrle, plcasc iddtiXy CV*%I%I tc audtnr clef WIW)cy/l iAVv .'J 'CcX}. is acl Ms.& w4 vhaQt numbs)_ 4 dr KG Pao dtvt51 1 E4Ak� `�rti3.0� J'}tOJ'I;RTY D 1NL%GE (pfm" Jcmibc the vaK- end "IetA of dw. dumi&-toyrsw taane. slhOmotnk'nbr'pcfsrxul'propetty ; e�limat"rti lbsllr. docuruwiauon ofd vu snw have -om.r !> E.. ,.', •; Jl`t_r1J1iY (if }yes •rpe injured, plcasc Qva data;tx): �. ,..._,.,�.� Jda.yW any ph.sici ri(c) ar mry 4tlacr nudieat prolrenkvial(s) mwlvcd: Js A Arc you still mti.irsg mWical trw±nj an7 A " I declareunder penalty of pe-ditry under the laps of the State of Washington .1'o' g is true alld Coi-xw:" atd mid ,Nt;lcc (�:it)'; State)) Slgnattuc MEYERS F LOOD ' PACE 1 Off' 2 11/14/01 Arrived home at approximately 5:30 pm'to find that the Iower level -of the house had flooded that day. Most of the water had soaked into the carget-an pad by thz,timd that 1 got home. By that time, the ditch was'also lower but I suspected, that it had overflowed. There Nvere sipis of water and debris running down the driveway iron the ditch so,I called King County to report the problem. .11/29/01-- I called King Country Roads Division-agaiii.: They s6d•ihat someone would bi out' on Monday. Deccmbcr 3"' to investigate the'problem. 12/5/01 - I arrived home at approximately 6pm, I had a.rnessage on iny answer i gg machine from hituiny Espinosa vAth King County Roads. He stated.i Mt he' was.in'my neighborhood attdwould'. be out to my property in approximately !z hour. He did not state;tlae: tiirte'ihxt he'called and aiy answering machine doesn't track'it so I do not know whaf'timc: of the day°he called. Tliis was the only message that I received from him. 1-do not know if h6'was-out,to my:house or not: 12/13/01 - My wife arrived home at. approximately 3 pin to -find ,that the ditch had -been overflowing and the water running into the house again through the ctrage:. She called ine' acid I called the King County Road Division at 3:30'pm. Mike Hudson arrived -at. 5:30 pnr: He stated that the drainage tile -.probably needed to be -upgraded to handle a larger 'capaeity.. of water flow. He instructed me to call 1 -900-KCroads. My. ���ii`e also'ca'lled 91"l:arid,tlae RehtortFire Department was dispatched. Bill Kullburg -and his crew froiirKing C:oui,ATire Disitict 025 assisted in draining all of the water from our home that day. 12/14/01 -1 called 1-800-KCRoads and talked to Bob Napier. All of the other employees were out at lunch. I told him that this was the second time that this had` Happened'and we needed someone out to our }tome to see the damage as soon as possible.:He-said that someone would be. contactim,, us Mid would come out and see the damage before we repaired anything. He said that this person would be out later that Sallie day or Monday, December '17n'. 12114/01- I called and talked to Lori Kronan at 1:45 pm.. She had Galled my «�ife earlier and stated that they had a "vac truck'? out to our property on'the niorriing of December I 1 `h but'she didn't knok- if they had found anything that would. have caused the problem. 1.2/.18/01- Called at 9400 am and left a message for the roads department to see i f they had been out yet and if they hadn't, it was imperative that them conic out ASAP because we were having new carpet installed and didn't want this to happen a third' tine: . 12/18101-- I called I-800-KCRoads at 3 pm. 'Talked to a woman at -fist, the t:was transferred to Lori Kronans voicemaii. I left her a message to call me. Lon'.k o' nan c4fed rne.back-that same day and stated that there wouldn't be anyone from their department looking at our damages. She said someone would be out to check out the -drain --drat same afternoon. 0 - .1. MEYERS FLOOD — continued PAGE 2� OF 2 12t27/01 -- l called agaur at 11:50 am. 1 asked fbr,I;ori b4f'she..was dut.iii:,thi E61&: The person that 1 talked to looked up my'file and said that nothing was..reporteilas beiiig:dotie-yet_"She''; would leave a message for Lori. 12/28/01= 10:30'am — Received call from Lori. Kroniin.. She:said'she lia'.bedn'.oui'afour'',; property and looked darNrn our drain and didn't see�any� blockag,�.,,:Shc:saw a-slight=how in.thc pipe near the telephone pole area, but nothing that, sh&u ifrestr 4;l; 8l She's -no ',st re-ifthe:. vaetor cleaned out sticks or debris, but wheir they-vactored%it;:tkieyfotind''nothing th4,was.of - large proportion to cause blockage: She said she had filed.the:paperi 4k." to fitive the ditch -dug . and cleaned. 1/25/02 — Called Lori Kronan at 7 ami. informing her that thQ ditch-�#as eresting again. and it , needed to be looked at inmiediately. Sometime:that ihor'', -et -10ain �sohneone,*as cant to tnny property', but by That time, the water in the ditch had decreased: --They lcft. a lo. k,oNwid*' pile in. my driNieway. She stated'that she'had-filed the'request to have.the,ditch cleaned but'was itot sure v,,rhen this would happen. 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Road Services Division Deparbmnt of Transportation 201 South Jackson Seattle, WA 98104-2637 March 27, 2002 TO: Robert Hansen, Claims Officer, Office of Risk Management FM: Linda Dougherty, Manager, Road Services Division RE: Claim: 31249/Claimant: Chad L. Meyers /Amount: $6,402.61 Thank you for your February 12, 2002 email requesting conuneuts and a recommendation concerning the above -referenced claim filed against Ring County. The claimant alleges County responsibility for flooding damage to`the garage and lower level of a residence located at 14028 160th Avenue Southeast, which occurred on November 14, 2001 and again on December 13, 2001 between 8:00 AM and 5:00 PM. My staff has reviewed this claim and provides the following findings: Incident Confirmation: A query of the Citizen Action Request database produced CAR 01- 005097, received from the claimant on November 30, 2001 at 2:55 PM, which stated "ditch plugged from last rain, had water in basement." CAR 01-005343 and 01-5405, which were received on December 13th and 14th also confirmed the incident. i Damage Confirmation: Roads staff did not confirm damage to the Meyers', residence. Used sandbags were, however, located on the north edge of the property, which would indicate a flooding problem. Recommendation: Staff recommends this claim be denied. Roads staff believes there is no liability on the part of King County. Second Party Liability: Please note Brenden Marshall, Jr. (former owner), filed a claim for flooding damage (Claim 21860), which occurred on December 31, 1996. Staff investigation confirmed the installation of an 18-inch enclosed drainage system extending across.the entire frontage of the property. A check with DDES could not locate any valid right of way use perrnits,authorizing installation of this pipe. Staff believes this pipe is undersized (and probably -was at time of installation) and cannot handle=flows from event storms. Roads staff further recommend Mr. Meyers check his purchase paper work to determine if the `known' flooding problem was disclosed. I Remedial Action: County engineering staff have reviewed the site, have assigned tracking number (4-1032) to this project and are currently designing an upgraded system to correct the problem created by the improper pipe installation. Hold Harmless A rem ement: NIA If you have any questions concerning these findings, please contact Office Engineer Bill Hintz at 296-8709. Enclosures: cc: Roderick E. Matsuno, Maintenance Operations Manager i Bill Hintz, Office Engineer Sp{, B.2e01 5:04PM KC WLRD IVO.E,Qc P.3/9 TONG- OuN Y SURFACE WATrR MANAGWENT DMStett ^ t✓ : �/ . DRAINAGE IiVE5TIGATION REPORT Paflo iz •iNvi.-snaxnoNn� `Gyps Resolved by: Data: /�(�' 9� Ot: d by Fla i la• .ReceAred fi-am- ` rA&" pens pWnV ftr l,iAI+QE L7 Y PHONP c, ' GI(O ADDRESS: �G.pO /�� tlzy'_l1?;' Lacac can of proUen If Marant \ Z Re arteC AabiartiT 11`f1�J !�Q 24 srG'U ��lM!�.�C t^r •-•`'LG6..Jl/`r `_ ./ _ /1 { { J� • +� �'.li:,"y14��/.T"��1: g/.,ZZ.CJ C-t�r,7'!.'r,��l-v ��7J.+'•r�:�i�f r?'.lri'P� :!.�9 /,'�j��•G�.c�v�! 1' /.•`1��.%,•% /'Ir:l; Plav,n Um: RkG lj L r,11 G s % Lat No; 7/ Block Rai Omer agepJ Invavad: No F:eid Irry s;Vcatbn Needed -' Pan:pd No. / .G 727- - O//O 77�Bm= 11eWfQ� U. 114. S 7 R - - Old 8as�n ,C Council bist� Cterge hta: RLsSPDh►S : Ctrszen notified arrE 70-9* !? '_j/ �•' !ester �!n person ArSPOMWON: Tamed to �` ' On,�-/AfT by • OR: No further AaJon rec&nnwnded bee Lead agency has boon notMed: Problem twz been corrected ' — No problem has been lderttifiec r lrsvestJgation addresso Prot • Rdvate problem - 14DAF' W77 no: cansldcr becaus& , Waw orifllnates oaslre a)d/or on nalghboring parcel loeatlorr Is outside SWtJi Service Area Other (Specify); I • . DA-M CLOSF_D: ./ j i C-�- by. APLI.: ������� �� ��� �• Drainage Complaints - From the Files of KCWLRD 1 JPn. B. Z0B1 5= 04Pt't KC 11Li2A NO.6Q P.4/9 a. Complaint 97-206; Don Gam, 16046 SE 14274 PL, Renton Investigated by' Stan Groom an 01114197 Drn or= his lived at the ibwe reheated location idnte the easy 60s (bait house nw socond built in the davelapment). Surface storm water flows began flooding his ganYe approximately Ave years ago. At his own ocpease at that time he btoughi a back boe 1n to tut a dx duW ditch along tht back side of bic property. This open trench provides ir.Ucf during most precipimdon ulwts' aurfsoo water mover around his property. Storm water does breech the top occasionally. The ditch IMs --dun—up and ho clears the ditch of debris that Iloars dawn and r edu= flow. He wants the dtmnage ditch during sham events (he wasn'r around far the last storm event) m obarsve its furutionalitr as a ptecsntion as well. He wants the drainage to continue down 16W, Avt SE instead at It conveyance system amend his and neigbboes property. Appateatly, ac dcvelopment north of his luopeny has b=cased odditlonnl ruAotris concentrated into the drainage along 160a Ave SE and st"egnently,rum-to his prctcy- Stsadiag water, x'nnnff from 160* Ave S2= , riiscba ges into %his area Low pescaiation. Ore= said the lend can't be developed base they don't have the percolatiou for infi8ration of septic systems. 160d' Ave S.E. 1 �J Slope�q� 5 ....................................... f DttGh SE 142"d Place 1 t 4—, -1,1e x l ,� o0 �f N } s 1 1 �TL� 'Drainage Complaints - From the Files of KCWLRD 1 JAM. B.ZM1 5:BSPM VC WLRV "0.642 P_7i9 OPTIONS VWD DISCUSSIaN xr. crag" is copcarnsd above contiUing apstra'aM deaalopwent which typically reeulta i,n Qore surface watex flgwa through hie drainage ditch and occasi.anally into hia bard. 1 explained that for larger developmento vhare wore than 5,000 squaw Feet of.3mparelo�s surfac.a are constructed, the developar•s angineex is only required to review cbe drainage ayatod•4 Capacity up to one quarter of a mile downvtreaa['from the proposcd plate outlet point: For ainglo homnattem, there is normally no dewnwereAm ahalymie required Glace thera is usually lean than 50000 aquaro feet •of new imparviasso murfaoaa constructed. I suggested that Mr. Gragq look for Dsvalopocnc Sig" along 160th north of hip borne. Whan ho saaa ace signs, he CC= attend public bearings and .mite letters expremtrinq his Concerns and outlining his dral-rage' impacts. ratr>,�er �� s lso PROPOSM 6gLV ip3f: Ho solution to this drainagc problem was i4entiflad. Mr. Gragg requested that we clean Outi his drainage ditch, Wn offtrcd to clean out part of his ditch if our contractor can get the nocaaaary equipment from Gragg's driveway into tba•diteh. HO PRIORITY SCORE WAS CALCUUM= SINCE NO SotfT.LIOA was IDBNTIFI" a ��®�nu� ��R I�. Drainage Complaints From the Files of KC1dVLRi) JAM. S.EMI S,04PM KC AM H0.642 p:r..'.�•o VM'aS+i ' bDZL eiiriS '`�Y �Ri� 00. s'of►7A aas^oaf P'sr1 P� sss9lrl • eusrv�o�nooa p�.amoS asai�s�cx ra�xx �smar) ! . eat a= nvazaastnn w 3w DATE 3-19-97 � TO. run PjMt Alan uoyara aa: k 1p XVAWMTiox FM COMUNT pro. 97-0206 GRAr4 16046 68 142SM VLACt iMatOW 2as-016a CaOMM&= CmaLONDLOOra .. . dRZ61itBL 1-10-97 r12i.n XV7 1-14-97 ET MAN GPA-.-lK t2ITA YYa1._ 3-7-97 BT &l m MSYERS. OIL F%Xd a OWN 8a[�hOtJaPe . pleas* a" r-bM attacbed'ex&aLag& eoeWlaiat inve.otigatio= report dated 1-14-97 by Scan Groom. rIA'OIiJR6: I aiacs the problem oaato all of tho MAP project criteria listed below, it Cpaalifiao for and hag been investigated under.the e®hp program. ' • The problem cite im within the Size! oervice.area and doe* not involve a xiny'Oouaty (AC) code violation. • The problem site aho a evidtnte of or reported loeallead flooding, stoaiorn'and/ear a.di2negtati= within that off road drainage ayatasa'oa pr1wete'residential and/or cowminarcial propa ty due ia'part to later upstream development. s • The problem ie.caused by surface water from more thaw one adjoining property- . solLss i 7LcOurdinq to the KC ocila map„the dite is located in the following soil i►eociation: A=ZRWOCO "SOCXX720pa M04ora.Laly well drained undulating to' daily soilo that have donee, very *lowly permeable glacial till at a depth.o! 20 to 40 inehae; on uplands and terraces. ' I Z met with Mr. Gregg on"March 7th and toured hLa property. XM' development cantImuee in the approximate 60 acre drainage basLn north of his property, ¢+ore drainage waterihas been routed south Lnto o the pond located juat im of his property which than draLns oast and south arvund the edge of his property. I f 1 Tfn E Hdozomi �� INCERIM P S Drainage Complaints - From the Fifes of KCWL.RC) ip". 6.2ml 5:05PM KC A-RD NO.642 P.6r9 He requeaxed that the drainage tlwing youth along the coat aids of 160th kvonue SZ be raxouted straight south along the east side of 160t'h peat 5E 142nd place rather than the currant routs which flaw oast 4nd south axaubd his property. !(r. cragg stated that aevaral Lang tares recidenta havo told him the dr4laage used 1-0 flaw Qtraight h along the waet and east aides' of 160tthh all the May down to sE 144. . I stated that may be true bat the exleting drainage pattern is old a.xi cannot ba revised because it is considered the establiahed drainage pattern for his area. I rcvia:wed hie and hia two bei9bbor+a drainage related impacts azA scored the problem at 14 with his gazage and septic oyatem impacts and yard dnubays to two properties. Although the last fw yearn hove, been aspeeinliy wet and.bad, I rated tho event frequency at 10 ar ante, every 2-5 years which is air estimate of the froquoucy of how often his septic syntam will be, ewvvralp.e pctod cv= the loxuq term. Mr. Gregg stats'd tbat hia pumped effluent saptic system has worked tine for the first 15 years. However. he has buffed up four pmrspa within the last -three years due to the increased graaadwater flewo into his septic tank/drainfieid area. rrom hia vet/dry Daemon observation, he is convinced that most of the groundwater ccmap from the drainage ditch located }ugt above h em drainfiald. . We reviewed trays of protecting hie Septic drakaflmId frcat th4 nvorvmcut of groundwater from the uph.111pond'and drainage ditch. we diecunoed ways to meal the earthen ditch itself usi.up a plastic line or a largo half round or full pipe sections along about 50'feat of ditcb above, hie drainfield. I pointed out that considerable groundwater may still flow from north to south below the ditch eecttan no that sealing the ditch may not solve the problem. Depending on the depth to hardpan, an impervious vertical layer of plastic or bsntonits slurry located uphill of bin drainfield between hie drainfield and the ditch would probably be the a"Imat wad moat effective solution to this problem. This impervious layer would run from the ground surface, down- to, the hardpan layer where it would be "yed down into the hardpan layer.! Because such a layer would restrict the flow of ground water, higher groundwater levels' might result in this part of GraggIa yard with More groundwater surfacing during the Vet s■nson especially near each and of such an impervious wall resulting in agora uet season aurface.wator seepage/flows and icy conditions on portion of Mr. Gragg'a°driveway. For any work thin alone ,to the drainfiald, any yord.drain or impervious facility of this kind would have to be reviewed and approved by the Xing county Rea lth, 0epartmar at (Rayne Olson at 296-9731).' 2 Drainage Complaints - From the Fifes of KCWL RD U. S. DEPARTMENT OF AGRICULTURE, ex.. I LS MAP SOIL CONSERVATION SERVICE S.=ALE : f 0 7'30" 1 CiBD00CY ��FEET1Z2�REN70N 5.1 MI. R. 5 E. AgD Tu Rd Tu 900 1 n • fla Aga •rA96 tf rq' < o .. �.. . ' ABC 4Agc () •4.73• • _ Age i •� - • F ''b� i�sfi Rip ss- • , •-G __ . • .i' '�t ACC I! x. a •EvB n j w • .t3 H{ B ngBM --- -- -- I . „ 3 424 .. •"�s s 4_ _yam •n t I Q 574 - 1 Sk PARW. CH: ! ; ••� '�� 1 BPe a • Ag40, AkF _� -..rr ---..}.--...- -7.kn as b'�r•�� ' I Rh Py AkF { •i • l s d pNg I .•` =Py AkF - ° �' •1. i- h. Ma I • '24- 1 s I Elpy � lwt P,y •Rh R1 lull Pc rk Ur PC 4kF, Ng A wAs; AkF K Park _ pY IFIC AS7' ,ii,PY .1 " k °ate {� 15� y : Evc AgC - A6a AkF OF i B n 1 am -- _ I \ I Age'' -- . _- _ a _r ��_ - •___- -- t_ AgD I AkF A9C Ip }- . _ .-------, "Are King Coal Min I ` AgC k'- / (Abandoned) EAge II (1MB AgB �_PIPELIN£��` aP``. It 'Tank I . 27 2 492 I Page 1 of 4 OFF -SITE ANALYSIS DRAINAGE SYSTEM TABLE Basin: Basin draininal to 160th AVE. SE Site Visit 1/20/2003 Weather Overcast A R C D F F Site Visit 1/21/2003 Weather rainy C� H r ,.N•1-��� -_ - ` - •:-�f-. 8e61 -1"'w . 0111, I�earr= r1 e ,^Ilv $ka - � �# �� � .- - _ `4 - .G 'i' i7: F.Y"H.'!w'- - �.Ri- h='ri',f:r !Lr�• .. ft3vtt 1t p _ I�- > -�eM1a�• .. r ..,75 �k�-,..,^��,...K. = . Ize �llarrae `"v�ric�I �,. :a 3�Si s tE 8a ��• .�.+- ' : F ��s� : _�., ;,." - �.� � '�y, �, r ��� �.- �., �,; _ •?�: — � = "se_di. ti ri Irt_ isit3ra tip � to a .�. - . 3`� �.r�'>�r;,-�r � � .-����;�:�—� 1 37LF -18" LCPE Crossing SE 136th St N. to S. 1.4% 0-37 none SEE NOTE 2 System in good condition 2 CB (Shallow) Collecting from pavement NIA 37 None 3 218LF -18" LCPE Under gravel driveway 3.8% 37-256 None 4 58LF Channel 4' wide; 3' deep 4.8°k - 256-313 Rusty water running from None Side slopes 1:1 Rockery to earth lining the east 6" plastic pipe 5 38LF -12" LCPE Under utility access drive 3.6°h 313-352 Erosion due to a water Water pool 2.5' wide .5' deep outfall from pipe to channel @ south and of pipe fi 95LF Channel 4' wide; 2.5' deep 42% 416-468 Side slope 2' from edge of 4" roof drain east. At beginning of channel Straw Side slopes 1:1 to 1:2 " Earth lined pavement ,� �O ba)! 7' from S. culvert 7 , 20LF -12" Concrete Under dirt drive to back of 0.4% 448 468 Ponding Cm south end of Plugged 4" roof drain east prop. pipe �k,�' south end of pipe 8 41LF Channel 5' wide; 2.5' deep ° 3.2/° 468-508 Water pool 3' wide .5' deep. 1.5' edge of pave. to edge of Side slopes 1:1 Earth lined Straw bail 9' from S. culvert water " 9 18LF -12" Concrete Dirt drive to back of property 2.2% 508-527 None SEE NOTE 1 1' outfall to 2.5' wide 0.5' 153LF Channel 4' wide 2.5deep 3.0% 527-678 deep water pool at end of pipe. Straw bail 6' From S. 5' EP to EW S. side of _10_- . Side slopes 1:1.to 2:1 Earth lined culvert, Straw bail 57' from channel N. culvert - - - - - 11 74LF - 12" Concrete Under asphalt pavement 3.0% 678-753 jNone None ISEE NOTE 2 NOTE 1: LOCATION ID 2 TO 10 WILL SE UPGRADED BY THIS DEVELOPMENT AS PART OF THE ROADWAY IMPROVEMENTS, AND WILL BE SIZED TO HANDLE EXPECTED FLOWS. NOTE 2: LOCATION ID 1, 11-24 AND 26-30 WILL BE ANALYZED AND WILL BE UPGRADED ACCORDINGLY TO HANDLE EXPECTED WATER FLOWS. s'rF �xt4iT �Gso Page 2 of 4 OFF -SITE ANALYSIS DRAINAGE SYSTEM TABLE Basin: Basin draining to 160ti1 AVE. SE_ = - A B C n- E F G H — � YF � Yam• .1"1• _ 3 _ /� r ifyv- WeS ;sxeA - si� �aYCl.Fr _ �yT "-o-� Cs' -# , -�'",ii --.. ``F ��.i T�c� 6 �s-c�� 9 :•.vTM � t!. " • � �'.'S3�' ' �:.• ..'�,SiUfis- .;Y".�� _�"'. P%- _ten" LJ �1, =�� "a- � �`� � ��rr'�r�a��•t t�� ess� . � = ;�14: Ile—'f"�2R��#_ ro's�r�to�s .ur�ci�r�a ay�'�ei�cii'�ig-ular�- a�Iis�t3�4-�� .r.� • � _ �- :ram � � , - � �f�i �� �. � . �_ 1l6�-�� r ` � e ,�. ����• .�+7� 0$ `��'Q�[)„k-,s ��i�ift$ � - �, S. end of N. pipe broken. Water currently seeping into 12 CB (Shallow) Collecting surrounding water NIA 753 CB in destruction ground. Made of Conc. Bricks_ Bricks out of place_ 13 52LF -12" Concrete - Under asphalt pavement 2.0% 753-805 None SEE NOTE 2 14 CB (Shallow) . Collecting surrounding water NIA 805 water likely seeping 4" roof drain into cb from east underground 15 35LF -12" Concrete Under asphalt pavement -2.0% - 805-840 None 16 3.5LF Channel T wide; 1.5' deep 2.0%- 840-844 Norie Side slopes 1:2 Grass lined - Property owner noted water 17 38LF -12" Concrete Under gravel drive . .2.0% 844-882 - draining into property over 160th 3yrs ago 118LF Chanriel 5' wide; 2.5' deep T wide 0.5' deep water pool 18 S$ slo es 1:1 Grass lined 2.0% 882-998 end of channel p Straw bail 44' from N. culvert OSEE NOTE 2 19 55LF -12" Concrete Under gravel drive 2.0% 998-1053 6" watterer pool 3' wide @ end off pi pdeep _ ppe Adjacent property owner noted 156LF Channel 3' wide 2' deep o that water partially drains onto 20 Side F-slopes 2:1 Vegetation Geed 2.0 /0 1053-1209 the north property during heavy rainfall. Flowing southeast then south 21 44LF -12" Concrete Under newly paved drive 2.0% 1209-1253 None Straw ball 8' N. of culvert Straw bad 126' N. of culvert 125LF Channel 4'wide 2' deep o 4' from EP to EW Q beginning 22 Side slopes 1:1 Grass lined 2.5 /0 1253-1378 of channel SEE NOTE 2 Straw bad 30' from S. culvert 23 26LF -12" Concrete jUnder Gravel drive 3.0'/0 1378-1404 None NOTE 1: LOCATION ID 2 TO 10 WILL BE UPGRADED BY THIS DEVELOPMENT AS PART OF THE ROADWAY IMPROVEMENTS, AND WILL BE SIZED TO HANDLE EXPECTED FLOWS. NOTE 2: LOCATION ID 1, 11-24 AND 26-30 WILL BE ANALYZED AND V11LL BE L3F^ =ACED ACCC-R. ":C' Y TC HN IDLE EXPECTED WATER FLOWS. S � y F, �"H/lo / 7 C � 45'd Page 3 of 4 OFF -SITE ANALYSIS DRAINAGE SYSTEM TABLE . Basin: Basin drainingto 160th AVE. SE e Cs (^ n H - _ r-- ' � .,z- � �.- �,' � � U z 2---•- r �'� �ss;�axer ':+,�" _ "zje sa t_ ? �� _ � _ cF:'i�sw'tt�F •s I'� l�'; � x •4.e; 43ilsri0tasancal`a '- ns�fili �_'.i '�? .f .3.. ��� t�P _=E9_`!(iffj3t CI lSY,;a(st ��_ ��r 1 i� - t°���3,�IZfi:F��alilB�y�"fri. i—sir `iG �-•�:�s�.� - - y � tii3i �_�G�� ;�� , _ .�Y �_ �1��8�' -�;�l'�ry.:�, = t�.u$=FC.:rv-� 4 r "�-:r: ���� - = s4 Y � f� ��� ��,: ;�.�,,�'�,� �,��"�,�`ir "'Y. ��. _ 7, �►Yi8t�9tti3r�r,iliCr_SiO���i1 �.Imp�� �`�•�r""x� i� 'i=� R- j1�;. i•G "�:���c.,;�.xi.�"--���`=`, � >�81'l�_ ;-,.:�'.�r_- �=� �'� ;� -,� -CF$Qo�iOSY��'?�r 24• 35f.F Channel ^ 3.5' wide 3' deep 3.0% 1404-1439 Erosion of slopes SEE NOTE 2 Almost vertical slopes Side slopes 1:2 Grass lined 25 40' 12" Concrete Crossing 160th Ave. W. to E. 3.0% 1439 None None Rockery @ inlet of West side 26 9LF Channel 4' wide 3' deep water pool. 9LF c 2.0 ro 1439-1448 4' wide 0.5' deep water SEE NOTE 2 SEE NOTE 2 Side slopes: vertical in length pool, 9LF in length 27 20' 24" CMP Under gravel drive 2.0% '1448-1468 Downstream culvert is crimped SEE NOTE 2 SEE NOTE 2 28 112LF Channel 2'id we 1.5' depth o 3.0 /0 1468-1580 Some sediment @ culvert SEE NOTE 2 Constructed 6 high berm of 5/8" rock to prevent flow into Side slopes 2:1 Grass lined - drive during overflow _ Past drainage problem 29 133' 18" LCPE Gravel drive in and out - 3.0% 1580-1713 reported at this location; See SEE NOTE 2 SEE NOTE 2 - - - Exhibit G. 30 50LF Channel 3' wide 3' depth to none 20 �° 1713-1763 Minor erosion at outlet of SEE NOTE 2 Natural braided channel at end Side slope 2:1 to none Earth to forest lined 'o 18" LCPE of 50' ditch 31 Braided channel Forested 1.0% 1763-1863 None None Water flows east among trees Shall be upgraded by this 32 12 Concrete culvert tinder gravel drive 2,0% From Parcel A None None development and sized to handle water flow. 33 12" CMP culvert - .-.-- _ Gravel cover _ _ - - 2.0% 30 Will not be affected by this development Road currently not developed 34 Yard Drain Lawn cover NIA From Parcel 6 None identified None identified Flows will be maintained NOTEI: LOCATION ID 2 TO 10 WILL BE UPGRADED BY THIS DEVELOPMENT AS PART OF THE ROADWAY IMPROVEMENTS, AND WILL BE SIZED TO HANDLE EXPECTED FLOWS. NOTE 2: LOCATION 10 1, 11-24 AND 26-30 WILL BE ANALYZED AND WILL BE UPGRADED ACCORDINGLY TO HANDLE EXPECTED WATER FLOWS. Page 4 of 4 OFF -SITE ANALYSIS DRAINAGE SYSTEM TABLE Basin: Basin draining -to 160th AVE. SE _ n = R C D E F G H 6 -i. � �,?# �i" ,��a�t ��-=� `� i S#"e .III 0.Nam. � C�siide�`�apa � ,f� j-�/�}►-/i�_y N'� �e � �` is •��=: .� - .pti - � n �,el V �`i $'c � , t # ��A� �. n p t- /��_Yp/r��{� �ll��-�yVYxY4 ` �il�/�,�:.il�., i`9 +? -.� - �- �y/�'¢j�/ �=w�' � �-S� 34 - .•sue` J':M _ rl�i�r�� = .� : ��/.� _ a� M1i��J ���. _ _�C8 ooit�r. �����.�.w�� .- ��'-r {ji! B .. �-� -_ ryP V . _tis?y^••/•6 -tf��YS- S-Y =�S/�Ri lF/CI�11�Mi l.1 - _1T � . �= tie� r] Irlf te� elf 5 a" (4,i"..✓:d�xi_ = �.4'9:..:�? �.r-. ��rrlenntlsot��r, :l f'-�:`5-`--.�.=� - _ 1 !i. _ fY. }i_I f��r _ ''�i�'i�'iC�y'Wxk�.L= T r£ 35 12" Concrete pipe Lawn cover WA 150 None None Visible end of pipe from north. Under fence at properly line 1201.F Channel Grass lined 2.0°/0 150-270 None None Collects water from N. pipe 2' wide 1.5' depth and from adjacent properties 31 15' 12" Concrete Under drive to rear property -2.0% 270-265 None None if current flows None - 38 30LF Channei _ Alongside of drive— 2.0% , • 205-315 None Running east to west to on -site wetlands is maintained. 39 • 12" Concrete pipe Under drive to rear propetty . 2.0% - None Running north to south NOTE 1: LOCATION ID 2 TO 10 WILL BE UPGRADED BY THIS DEVELOPMENT AS PART OF THE ROADWAY IMPROVEMENTS, ANO WILL BE SIZED TO HANDLE EXPECTED FLOWS - NOTE 2: LOCATION ID 1, 11-24 AND 26-30 WILL BE ANALYZED AND WILL BE UPGRADED ACCORDINGLY TO HANDLE EXPECTED WATER FLOWS. i SEE E�,�II3IT` C �44.0 � � I ` I J �f w II ro 7 P a y � ara j 1 j L_-Jl_J S 4 g 2 4 i i i �r iao2a C �+ 53 14 11 12 11 10 4 s 1 also alw 000 0120 0110 o,00 mlar oa,o RI� I aE n5e, at. mKffmm I1 1 �f271f aRoVE , Se�LE: ! Qa H a o z o u s n g i n e e r 1 n g, Robert H. Darrow. P.E Edward J. McCarthy, Ph.D., P1, 13428 - 45th Court MAtWteo, WA 98275 14816 SE 116th Street Renton, WA 98059 fax (425) 742-8488 (425) 745-5872 fax (425) 254-0579 1 (425) 235-2707 December 5, 2002 Mr. Michael Romano Centurion Development Services 22617 8th Drive SE Bothell, WA 98021 RE: Additional Information Request Application No. LO 1 TY401 & LO1P0016 — Evendell Dear Mr. Romano: This letter is in response to an information request by DDES in their letter dated November 26, 2002. 1 have analyzed additional drainage complaints in the downstream Evendell basins that were recently released by DDES. The analysis presented below includes proposed mitigations for the downstream problems per Core Requirement 2 of . the King Coanty Surface Water Design Manual. Drainage Complaints Drainage complaints along the downstream systems from Evendell were investigated at King County Water and Land Resource Division as part of the Level 1 Dovnistream Drainage Analysis submitted with the project's preliminary technical information report (TiR)(Haozous Engineering, June 2001). However, since the preliminary TIR was prepared, the following drainage complaints and claim information have been released by DDES: Complaint ID Date of Complaint Address of Complaint .Type of Flooding/Description KCDQT Action 12/13/01 13814 10b Nuisance Flooding - Ditch on west side Request 0 1 - Avenue SE of 160th Ave SE overtopped road and 005339 flooded the owner's driveway and yard. Complaint 97- 1 /7/97 14028 160' Severe Flooding — Capacity of pipe 0203 Avenue SE system in front of mouse was exceeded. Water overtopped ditch, and flooded road and ground level floor of home. Mr. Mike Romano December 5, 2002 Page 2 Complaint ID Date of Address of Type of Flooding/Description Complaint Complaint i Claim 31249 1/29/02 14028 160te Severe Flooding — Capacity of pipe Avenue SE system in front of house was exceeded. Water overtopped ditch, and flooded road and ground level floor of home. Claim 21860 1 /25/97 14028 160'h Severe Flooding — Capacity of pipe Avenue SE system in front of house was exceeded. Water overtopped ditch, and flooded road and ground level floor of home. Complaint 97- 1/21/97 . 14038 156'h Severe Flooding — Inlet pipe in front of 0318 Avenue SE house overtopped and flooded basement. Claim 21699 1/10/97 .14038 156`h Severe Flooding-- Inlet pipe in front of Avenue SE house overtopped and flooded basement. I have also -provided additional information regarding the following drainage complaint that was presented in the 'FIR for the project (Haozous Engineering, June 2001): Complaint 97- 1/10/97 16046-SE ' Severe Erosion- Soil eroded from bank 0206 142" Place' is deposited 50 — 100 feet downstream and contributes to ditch overtopping and garage flooding. Analysis of Complaints The complaints and claims listed in the table above document problems that occurred along the downstream conveyance systems'from"the proposed Evendell plat. The complaints were filed by property. owners due ,to flooding caused by inadequate capacity of conveyance structures. The hydraulic,structures at the locations of each complaint were evaluated as part of the Level 3 Downstream Drainage Analysis (Haozous Engineering, August 26, 2002) prepared for the Evendell Plat. KCDOT Action Request 01-005339 was filed on 12/13/01 by Mr. Bret Bowden, a resident at 13814 160" Avenue SE., ,The ditch on the west side of 160th Avenue SE overtopped the road and flooded the complainant's, driveway and yard. King County DOT responded to.Mr. Bowden's action request and cleaned the ditches on both sides of the road. The flooding that motivated Mr. Bowden's call to the county was apparently Mr. Mike Romano December 5, 2002 Page 3 caused by a blockage in the ditch. Two driveway culverts on the west side of 160th Avenue SE, across from Mr. Bowden's property, were modeled in the Level 3 Downstream Drainage Analysis. The culverts, identified as P116 and P117 in the drainage analysis, were predicted to flood at a 2-year return period. Flooding at these culverts could create a backwater condition in the ditch, thereby causing water to sheetflow onto W. Bowden's property, as'did occur when the ditch was blocked. This type of flooding would likely be classified as a "nuisance" problem by the King County Surface Water. Design Manual. Complaint 97-0203, Claim 31249, and Claim 21860 relate to flooding that has occurred at the residence located at 14028 160th Avenue SE.. Flooding at this location has been a recurring problem. Both 160th Avenue SE and. a residential structure are subject to' flooding. On at least two occasions in the past, the culverts in front of the property have overtopped.' When flooding occurs, stormwater flows'down the driveway and into the garage and ground level floor of the home. This problem is considered both a severe building" and a "severe road" flooding problem by the King County Surface Water Design Manual. The Level 3 Downstream Drainage Analysis predicted flooding occurs in front of this residence at a 2-year return period. Flooding is caused by undersized culverts at locations PI 13, PI 14, and PI 15. , Complaint 97-0318 and Claire 21699 were filed by the property owner located at 14038 156th Avenue SE. A 12-inch diameter inlet pipe to a conveyance system, identified as P001. in the Level 3 Downstream Drainage Analysis,is located in front of the complainant's property. Stormwater in the easterly ditch of 156th Avenue SE overtops the 12-inch diameter inlet pipe and flows down the owner's driveway and into her basement. Flooding has occurred on more than one occasion and has resulted in damage to the owner's washer, dryer, and water heater-. This flooding problem is considered a "severe building" problem by the King County,Surface'Water Design Manual. Based on the Level 3 Downstream Drainage Analysis, the 12-inch diameter inlet pipe in front of the property is predicted to overtop at a 2-year return period. Lastly, a "severe" channel erosion problem is located in the downstream system on the east boundary of the property located at 16046 SE 142nd Place. The channel is within the right-of-way of SE 162' Avenue. ,Channel bank erosion that is occurring at this location could be depositing in a flat section of channel 50 to 100 feet downstream from the eroded area. Sediments in the channel could be contributing to floodingias documented in Complaint 97-0206. In.myfield visit of the site, Mr. Don Gragg, the property owner, described flooding that impacted his garage in,the past. A 4-inch pipe drains a catch basin in the driveway near the garage. The invert of this pipe" is only 1.4 feet above the bottom of the channel. It appears that when the channel fills, water backs up in the pipe and floods Mr. Gragg's driveway and garage. Minor channel improvements at this location would likely improve the existing floodingferosion and sedimentation problem. Alternatively, changes to the configuration of the 4-inch diameter drain pipe could prevent further flooding of the driveway -and garage. Mr. Mike Romano December 5, 2002 Page 4 Proposed Mitigations Level 2 detention standards are required on the Evendell site, and were included in the . preliminary drainage plan for the proposed plat. Prior.1o, receiving recently released flooding information from DDES, described above, we had considered the flooding to be a "nuisance" problem and did not propose mitigations in addition to the Level 2 detention standards. In light of the new information, additional stormwater mitigations will be needed as part of the Evendell Drainage plan to conform with the King County Surface Water Design Manual. Drainage Problems at 13814 and 14028 160`h Avenue SE For the severe flooding problem at 14028 160' Avenue SE, I recommend upgrading the downstream system as opposed to adopting onsite Level 3 detention standards. In my opinion, in this situation, upgrading the conveyance system along 160th Ave SE by eliminating constrictions, would provide more benefit to the neighborhood and surrounding properties than would adopting a more stringent onsite detention standard. By upgrading the system, the existing "severe roadway" flooding problem would be fixed, as would the existing "severe building" flooding at the residence located at 14028 160th Ave SE. Proposed upgrades would also solve the nuisance flooding problem at 13 814.160' Avenue SE. W tvle adopting onsite Level 3 detention standards would conform to requirements in the Surface Water Design Manual, only conveyance upgrades would fix the existing problems. , Pipes that would need to be upgraded would include the following: a Two driveway culverts on the west side of 160th Ave SE (P 116 and P 117) a Cross culvert under 160th Ave SE (P115) a Culvert immediately upstream the property at 14028 160th Ave SE (P 114) a Existing 18-inch diameter pipe at 14028 160th Ave SE (P 113) Upsizing these pipes would prevent the ditch from overtopping. Stormwater would be contained in the roadside ditch and would not be allowed to flow across the road or onto adjacent properties, as has occurred in the past at 13814 and 14028 160' Avenue SE. praina e Problem_at 140 B 156' Avenue SE For the severe flooding problem at 1403,81 W Avenue SE, either onsite Level 3 detention standards could be adopted in place of Level 2 standards or the capacity of the existing 12-inch inlet pipe could be increased. , Increasing the capacity of the 12-inch.inlet pipe would likely entail upsizing at least,115 feet of 12-inch diameter pipe.' By upsizing this teach of pipe to 18-inch diameter -and increasing the head above its crown at the inlet, the capacity of the inlet pipe would be increased.' The frequency of flooding would be reduced from a 2-year return period to approximately a 10-year return period. Mr. Mike Romano December 5, 2002 Page 5 Drainage Problem at 16046 SE 142o' Place For the severe erosion problem along the east boundary of the property at 16046 SE 142"d Place, the proposed Level 2 RID standards provide the mitigation required by code. Other types of mitigations to reduce erosion at this location, such as bank stabilization in the eroded section of channel or Level 3 RID standards, can be imposed through the King County Surface Water Drainage Manual under certain circumstances. Cleaning sediment out of the flat section of channel and stabilizing the eroding banks immediately upstream would reduce flooding to the driveway and garage at 16046 SE 142' Place. Alternatively, the owner of the property could explore the possibility of retrofitting the outlet of the drainpipe from his property with a flap gate or extending the outlet of the pipe an additional 80 to 100 feet downstream to where the flood water'surface in the channel is below the upstream invert of the pipe. Impacts of Mitigations on Downstream Properties I do not believe that upsizing the conveyance pipes along 160`b Avenue SE would aggravate flooding that occurs'further downstream. The amount of runoff that flows out of the constricted ditch during floods along 160' Avenue SE is enough to cause damage to affected properties. However, containing this water in the conveyance system would likely not result in a substantial increase'in flow, rate., Furthermore, because .the storage volume in the roadside ditch is relatively small and provides insignificant attenuation, upsizing the pipes as proposed would not result in an increased flow rate at the downstream end of the improvements. If you have questions regarding these analyses or need additional documentation, please do not hesitate to call me. Sincerely, War Q Edward McCarthy, Ph.D. P.E. Hydrologist Mr. Mike Romano ecember 5, 2002 age 6 References Haozous Engine6ring, August 26, 2002. Evendell Plat — Level 3 Downstream Drainage Analysis. Renton, Wash., Haozous Engineering, June 15, 2001. Evendell Plat - Preliminary Technical Information Report. Renton, Wash. King County Department of Natural Resources, 1998. King County Surface Water Design Manual. Seattle. i EXHIB I7~ L King County Department of Development and Environmental Services 9M Oakc:tclalc Avcnuc Sou il)we5! Henson, WA 9t1O55-1219 November 27, 2002 Mr. Wayne Jones_ Lakeridge Development, Inc. P. O. Box 146 Renton, WA 98057 RE: Liberty Plat, A02P0151 Wetland Determination Dear Mr. Jones: NEC EIVEL) i DEC 0 2 2002 Ans'4 I reviewed the Wetland Evaluation and Delineation Report and Wildlife Habitat Evaluation for the "Liberty Ridge" property,'prepared by Habitat Technologies, Inc., dated November 5, 2002. I met Mark Heckert of Habitat Technologies at the site on November 25, 2002 :and walked'the. property and surrounding areas. I also reviewed aerial photos in the County files, from 1936, 1970, 1.985, 1990, 1996 and 2000. 1 conferred with several of my.colleagues on interpretation of the Sensitive Areas Code in relation to this property. The site consists of two properties, `separated ,by 160'' Avenue SE. - Parcel A . (3664500141) has apparently been filled many years ago (prior to 1985) with ditches installed around the west,ksouth and east sides. The property is maintained as lawns and land scaping'with�a-residence. and shop. There are neither wetlands nor streams on this parcel.-,,,' Parcel B is two tax parcels (1457500085 and 1457500090). The northeastern portion of this site is forested upland. The remainderbf the property is pasture with a few structures and outbuildings. A central drainage through the site was ditched across the property following recent construction of three residences to the northwest. This conveyance has some wetland characteristics through the logged area, then is ditches across the pasture. An eastern drainage outlets from a culvert under SE 136th Street, conveying stormwater runoff from the roads, lawns and roofs of a pre-1970's subdivision to the north. This drainage has some wetland characteristics through the forested area, then is ditched ` through the pasture. These drainages are excavated through upland soils, and are neither used by salmonids nor convey a stream, that was naturally occurring prior to construction. Therefore, they are neither jurisdictional wetlands nor streams. TO: Mr. Wayne Jones RE: Liberty Plat, A02P0l51 November 27, 2002 Page 2 However, the wetland on the south-central portion of the site appears to have been present;since at least the-mid-1980s. The eastern ditch is evident in the 1970 aerial photo, conveying water from the culvert under SEA 36�' Street since that time. Thus, the source of hydrology to the wetland from the culvert is the "normal circumstance" for that wetland. This wetland on the south-central portion of Parcel B meets the criteria for a Class 3 rating. The wetland and a minimum 25-foot buffer must be protected through the subdivision process by placement in a Sensitive Areas Tract. The wetland buffer width could be averaged, as allowed in Code and Administrative Rule, with enhancement of the wetland and buffer provided as compensatory mitigation. The wetland's hydrology must be protected through -the subdivision process. This could occur by conveying the flows from the culvert underneath SE 136th Street across the site, either in pipes or aboveground, and outletting into the wetland through a dispersal system. Alternatively, equivalent hydrology could be calculated and possibly provided from roof drainage from surrounding structures. The stormWater runoff from the three new residences to the northwest is not required to be conveyed to the wetland as this is a recent new input to the wetland. The wildlife habitat survey may need an addendum prepared during early spring, to determine whether any of the nests observed on -site are used by species that require protection under the King County Comprehensive Plan. This property is within the Urban -designated portion of the County, so the few species that require protection include state and federal endangered, threatened or.sensitive species, and certain raptors and herons. Please let me know if you have any questions or would like to discuss this further. I can be reached at (206) 296-7291 or laura.case metro kc. ov. Since ly, Lau a C. Casey Environmental Scientist — Ecologist Critical Areas Section Cc: Marls Heckert, Habitat Technologies, Inc. Steve Bottheim, Supervising Engineer, Critical Areas Section L���e- Lo r e--z..ADv-%-, 7 ✓✓ �2� ' p-ynsk&�^- CC-L-,� 1 it �� I . _ - .1 �j .� � � � � i �� _ � �� J �� {i ,' • � i ___. ��. Bruce Whittaker 5/9/2003 Liberty Grove Contiguous L03P0005 Liberty Grove L03P0006 ERU Screening Comments Drainage- A drainage adjustment is required to divert the drainage from the Liberty Grove Site to the Liberty Grove contiguous site. Also, the adjustment should include routing existing south flows from Liberty Grove Contiguous to the drainage system on the east side of 1601h Ave SE. Revise the Level 1 Offsite Analysis to include evaluation of the existing downstream drainage course from the Liberty Grove Contiguous site, It appears that the existing drainage course flows to the east of known capacity problems on Lot 6, Block 3 of Cedar Park Five Acre Tracts(downstream points 30 and 31 in the Analysis). Please show appropriate mitigation for routing the post developed drainage through this area per Core Requirement 2 of the KCSWDM. Note that the Level 1 Analysis can be extended more than'/4 mile if a problem is anticipated(1.2.2.1 KCSWDM). It is anticipated that upsizing the existing culverts east of 160the Ave SE will be required. A letter of positive intent from the property owner(s) is required for any proposed improvements off the R/W. Please update the Level 1 Analysis to reflect new culvert improvements recently made to the culverts at locations 25, 27 and 29. Evaluate the upstream offsite flow entering the site along the northeast corner. Revise the conceptual drainage plan to address the offsite flow. Include a narrative in the Level 1 Analysis describing how the existing wetland hydrology is to be maintained following development. Revise the conceptual drainage plan to show any additional proposed drainage conveyance. King County Department of Development and Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 April 8, 2003 Wayne Jones Lakeridge Development PO Box 146 Renton, WA 98057 RE: Notice of Complete Application -for Application Time_ eri Application No. L03P0005 — Liberty Grove Contiguous & Rezone Request L03TY401 Date Piled: March 11, 2003 Dear Mr. Jones: The purpose of this letter is to notify you that on April 8, 2003, the Land Use Services Division determined that the above -referenced applications are complete under current requirements for a complete application. This initial determination is intended only for the purpose of applying the time periods for permit processing specified in King County Code. Supplemental information may be requested by the Division, as necessary, for the continued review of your application. Please note, the subdivision application associated with a rezone is not vested until such time as a final decision has been issued on the rezone. Our goal is to process your application within 120 days. However, the complexity and level of analysis required to review your project and available staff resources will affect the actual review time. The timeline can also be impacted by one or more of the. following: • any request made by the Division for additional information o changes or revisions requested by the applicant • mutually -agreed -upon requests to stop the time clock o preparation of an Environmental Impact Statement • failure to post the property o resolution of land use decisions appeals If you have any questions about your application or the posting requirements, please call Karen Scharer, at (206) 296-7114. Sincer ly, K Claussen, Project/Program Manager III Current Planning Section cc: DMP Engineering Karen Scharer, Project/Program Manager II, Current Planning Section, LUSD Bruce Whittaker, Sr. Engineer, Engineering Review Section, LUSD Application File QJ f King County Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue SW Renton, WA 98055-1219 June 3, 2003 Wayne Jones Lakeridge Development PO Box 146 Renton, WA 98057 RE: Notice of Reguest for Additional Information or Studies Application No's. L03TY401 & L03P0005 — Liberty Grove Contiguous Date Filed: March 11, 2003 Date of Complete Application: April 8, 2003 Application No's. L03P0006 - Liberty Grove, Date Filed: March 11, 2003 L03TY403 - Liberty Grove, Date Filed: May 7, 2003 Date of CompleteL Applications: May 15, 2003 Dear Mr. Jones: The purpose of this letter is to notify you pursuant to King County Code Title 20, that the Land Use Services Division is requesting additional information and/or studies to complete the review of your project. The information is described on the enclosed plat screening transmittal. When submitting the requested information, include a copy of the; plat screening transmittal and retain a copy for your records. Provide a cover letter, which lists how each .item, was addressed. Any clarification or explanation of the submittal can also be included in the cover letter. Please submit the information to: King County Dept. of Development and Environmental Services Land Use Services Division ATTN: Karen Scharer, Planner ll, Current Planning Section 900 Oaksdale Avenue Southwest Renton, WA 98055-1219 If the submittal is hand delivered, submit at the address above. Your application is on "hold" from the date of this notice, until the date you are advised that the additional information satisfies this request, or 14 days after the date the information has been provided. You will be notified if the Division determines that the information is insufficient. Please note that the supplemental information required after vesting of a complete application shall not affect the validity of such application. L03TY401 & L03P0005 -- Liberty Grove Contiguous L03TY403 & L03P0006 - Liberty Grove June 2, 2003 Page 2 The deadline for the submittal of the necessary information is September 2, 2003. In the event you feel extenuating circumstances exist, which may justify an extension of this date, you may submit such request, in writing, for consideration by this Department. Failure to meet the deadline shall be cause for the Department to cancel or deny the application. If possible, please submit all of the information in one package. If you have any questions, regarding the additional information or the submittal deadline, please call me at (206) 296-6758 or Karen Scharer at (206) 296-7114. Sincerely, Karen J. Sch er, Project Manager II Current Planning Section cc Kim Claussen, PPM III, Current Planning Section, LUSD Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD Kris Langley, Senior Engineer, Traffic & Engineering, KCDOT Nick Gillen, Senior Ecologist, Site Development Services, LUSD Application File aPIat.Screening� 'ransmittal King county Preliminary'Plat.Ap'pli'cation,'o"f Liberty, Grove:'Contiguous' Department of Development and Liberty Grove. and Environmental Services Land Use Services Division LUSD�Eile.No.,L03P00051.(LO3TY40'iyi 900 Oakesdale Avenue Southwest LO3Pb006, (LQ,3TY403)!::' Renton. Washington 98055-1219 Date;of Information r Request: Jun`e..3; 2003 ©eadline for. Sut �mittaf .of lnt6rmation. 'September 2;. 2003, . 1. Property Description, Engineering & Surveying: a. One additional Temporary Benchmark within the application site is needed, along with appropriate elevations (per KCC 19A.08.150(B)(2)), shown on the preliminary map. b. The datum required for vertical and horizontal control on the final recording document, must be as specified in King County Code Title 19A.08.130 unless exemptions within said code are met. C. Although additional horizontal control monumentation will need to be shown on the final recording documents, the monuments used to control the topographical survey should be shown on the preliminary map. d. There appears to be a fence encroaching northerly over the southerly boundary line of the Preliminary Plat of Liberty Grove Contiguous. (Shown on preliminary map per KCC 19A.08.150(B)(1)). This encroachment- issue needs to be resolved prior to preliminary approval. The Land Surveyor may want to discuss resolutions with the Platting Unit of the Engineering Review Section. The resolution may affect the density yield. e. Document the separation between existing structures to remain and proposed property lines. Setbacks required under KCC 21A.12 must be maintained, or approval of a zoning variance would be required. f. The title report discloses several easements affecting the property. Many of these were not included with the title report and need to be reviewed prior to preliminary approval. Some may need to be relinquished. Submit easement documents so that'review of their impacts may be completed. The above notes apply to both plats except as noted. Although these plats are under two separate applications, there is reliance upon one -another. Note that recording simultaneously or in a limited sequence may be required. 2. Plat Calculations: Submit alternative Subdivision Density and Dimension Calculations for each plat under the R-4 with the density credit transfer scenario. L03P0005 & L03P0O06 Plat Screening Transmittal Page 2 3. Recreational Area: Revise the Plat of Liberty Grove to include adequate on -site recreational area of 390 square feet per lot (KCC 21A.14.180). 4. Drainage: a. A drainage adjustment is required to divert the drainage from the Liberty Grove Site to the Liberty Grove Contiguous site. Also, the adjustment should include routing existing south flows from Liberty Grove Contiguous to the drainage system on the east side of 160th Ave. SE. b. Revise the Level 1 Off Site Analysis to include evaluation of the existing downstream drainage course from the Liberty Grove Contiguous site. It appears that the existing drainage course flows to the east of known capacity problems on Lot 6, Block 3 of Cedar Park Five -Acre Tracts (downstream points 30 and 31 in the Analysis). Please show appropriate mitigation for routing the post developed drainage through this area per Core Requirement 2 of the KCSWDM. Note that the Level 1 Analysis can be extended more than'/ mile if a problem is anticipated (1.2.2.1 KCSWDM). It is anticipated that up sizing the existing culverts east of 160the Ave. SE will be required. A letter of positive intent from the property owner(s) is required for any proposed improvements off the RIW. C. Please update the Level 1 Analysis to reflect new culvert improvements recently made to the culverts at locations 25, 27 and 29. Evaluate the upstream off site flow entering the site along the northeast corner. Revise the conceptual drainage plan to address the.off site flow. d. Include a narrative in the Level 1 Analysis describing how the existing wetland hydrology is to be maintained following development. Revise the conceptual drainage plan to show any additional proposed drainage conveyance. Please provide ten (10) copies. 5. Traffic Study: Please provide a revised traffic study, which evaluates the following items: a. An AM peak hour analysis of the intersections analyzed in the TIA submitted with the plat application b. An alternatives analysis that addresses the Hearings' Examiners decision for the plat of Evendell, specifically, the denial of the rezone request (and, reduction of the permitted number of lots to 46), together with elimination of the requirement of off -site construction of the SE 136"' Street (156" Avenue SE to 158' Avenue SE) connection. C. Updated existing conditions (2003) levels -of -service (Page 7, Table 1). Please retain the 2001 information (unless "2001" is a merely a typographical error) to address previous testimony related to the reductions in regional trip activity resulting from local market conditions. d. The 26% distribution south along 160th Avenue SE may be excessive under a "with SE 136`t' Street" scenario. The travel path to the intersection of 1421 Place SEISE 156t" is nearly 33% further along that travel path as compared to that using an extended SE 1361" Street. 2 L03P0005 & L03P0006 Plat Screening Transmittal Page 3 e. Perform a travel time analysis to compare an actual morning peak hour travel time along the 1601h Avenue to SE 144'h Street to SE 1561h Street trip versus a theoretical SE 136'h Street to 1561" Avenue SE, with appropriate delays factored into the westbound left turn to proceed southbound on 156" Avenue SE. The newly constructed west leg of SE 136'h Avenue SE may serve as a reasonably accurate source of data on the delays required to complete a left turn across 156' Avenue SE. Other single lane approach "STOP" controlled intersections along the portion of 156" Avenue SE, between SE 1281h and SE 142"d Place. f. Updated traffic accident history (that is, include 2002). For more detailed information regarding the traffic study, please contact Kris Langley, Senior Engineer, Traffic & Engineering, KCDOT at (206) 263-6102 or (206) 296-7155 (or kristen.langley(@metr_okc.gov. Please provide ten (10) copies. 6. Road Variances: a. Please submit variances to the KCRS as necessary. b. Intersection spacing: plat entrance (LG) at 160" Avenue SE (measured relative to the intersection of SE 135"M60'" Avenue SE) does not appear to meet King County Road Standards for a Neighborhood Collector street. 7. Road Improvements:, a. Please provide a conceptual frontage improvement plan for LGC that includes (under a rezone scenario) an improvement of the frontage of the three intervening parcels (0086, 0087, 0088) that appear to have been segregated via a plat KING CO ENGINEER SUBDIVISION NO 6846 REC NO 9410250673 from the Tax Lot 0085 (the northerly portion of LGC). b. Please provide a conceptual frontage improvement plan for LG that includes the referenced improvements to SE 136"' Street to complete the improvements that are required of the Applicant of the Evendell subdivision (DDES File L01 P0016) under both the proposed (and subsequently denied) rezone configuration and the approved 46-lot (current zoning). C. If the Applicant for the plat of Evendell does not succeed in=the requested appeal to the County Council, the off -site connection of SE 1361h Street will not be constructed. This requirement may be placed upon this application as potential mitigation of plats' impacts at the intersection of SE 1281h Street/ 1601h Avenue SE. Please provide a conceptual plan for the improvement of SE 1361h Street between 1581hAvenue SE and 156'h Avenue SE, including a sidewalk on (at least) the north side of the roadway, and a conceptual plan for the re- channelization of 1561h Avenue SE at SE 136'h Street. 8. Pedestrian Connectivity/School Walkways: a. Information has been provided in the past that school age pedestrians have a gate available for access to the west side of the Liberty High School. Identify the walking routes from both LGC and LG to the location of the gate. Identify the conditions along the route. Where abutting the boundary of the LGC and LG plats, and, if not otherwise required, provide frontage and off -frontage improvements to accommodate this pedestrian activity. 3 L03P0005 & L03P0006 Plat Screening Transmittal Page b. Provide an analysis of walkway access to schools serving the two plats of Liberty Grove & Liberty Grove Contiguous (Liberty High School, Maywood Middle School, and Briarwood Elementary). See the attached comments from the Issaquah School District. 9. Wetland/Stream: A site visit was made to verify the wetland areas on Friday May 30, 2003. Based on this field visit the following additional information in regards to wetlands. There is an off -site wetland located north of SE 1361h Street and east of 162"d SE. Flows from this wetland enter the site in the northeast corner -of the property and flow south along the eastern edge of the site, in the area of proposed lots 9 — 16. It appears that the water ponds in the area of proposed lots 17 -- 20. The applicant's biologist should evaluate these areas for wetlands. The submitted wetland report does not address these areas of concern. 10. Revised Preliminary Plat(s): Provide 15 copies of each revised preliminary plat, as necessary, as a result of above -referenced requests for additional information and 4 copies of any special study requested for each plat unless otherwise noted. As a result of the review of the information, additional information (studies, revisions, etc.) may be requested at a later date. Further evaluation of these issues may result in the reconfiguration and/or loss of lots. 11. Rezone(s): Based on the information submitted, DDES staff finds insufficient justification to recommend reclassification of either rezone request, see Comprehensive Plan Policy U-122. You may choose to submit further information, which addresses this policy as it applies to each site. Please provide two copies for each rezone file. 4 King County Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 (206) 296-6600 TTY (206) 296-7217 Alternative formats available . upon request Drop -Off Cover Sheet for Land Use Services Division IMPORTANT ****kk**kkkk***k*kk!**kkkk*#* PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS Project No.: L 0,3.,000(7 1_ o319oaQG' Project Name: LGr>y/ G,,,, /Ie, oA! ,X vocal' FROM: �gvi'� Gl/. Gasc y Company Name / Contact Person Telephone No.: ZaG-Z 27— -'?/F7 TO: �G crrc i7 s'� %1Arar RIECIEFFED NOV 2 5 2003 K.C. D.D.E,S. ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat ! Plats Please specify item(s) dropped -off: /2csoar�sc f 2c�� Lot Line Ad'astment Permit Please specify item(s) dropped -off: Right of Way Permit Please specify item(s) dropped -off. Clearing J Grading Permit Additional information requested; please specify item(s) dropped -off: Other: PLEASE NOTE: All drop-off item(s) will be logged into the computer under the project number, therefore, it is important that the top portion of this form is completed properly before you"drop-off anything. Assistance in finding a project number can be provided by speaking to a Land Use Services Division Person of the Day (POD) or the Zoning/Land Use Technician. Your cooperation is important. Thank you. LUSD Drop -Off Cover Sheet Ig-cvs-dropoff.pdf 05-30-2002 Page 1 of 1 P.O. BOX 1255 FALL CITY, WA 98024-1255 CELL: 206-227-8187 FAX: 425-228-7232 CASEY ENG]T\\1EERWG November 20, 2003 28477 Bruce Whittaker, F.E. / L.U.S.D. �4NALR King County D.D.E.S. REFERENCE: Liberty Grove Contiguous, L03P0005, (L03TY401) and Liberty Grove, L03P0006, (L03TY403) SUBJECT: Response to November 12, 2004, Plat Screening, Request For Additional Downstream Information Dear Mr. Whittaker: The following is a narrative of the existing downstream system from the Parcel "B" portion of the Liberty site to the Petrie Property. A. Description of stormwater drainage within the Parcel "B" portion ofproject: The stormwater generated from the site in the existing condition and any stormwater that enters the site from the north (SE 136th St.) flows to an existing wetland at the southern central portion of the property. The wetland is shown on the preliminary plat. Stormwater leaves Parcel "B" at the low point of the wetland and flows to the south. It should be noted that the wetland is not a closed depression. B. Description of Stormwater Drainage Across Property#1: Tax Parcel#:" 13802 160th Ave. SE Steve & Joanne Lee This property is located directly to the south of Parcel "B" of the proposed development. Permission was granted by the property owner to cross this property. Stormwater leaving Parcel "B" (under a wood fence) enters Property#1 and is intercepted by a constructed swale (sump). See Picture#2 that is taken from the STORMWATER HYDRAULIC ANALYSIS CIVIL ENGINEERING DESIGN LAND PLANNING Off.. C r�c�+En e �s�ca3� Saab , L North end of the swale looking south. The swale (sump) is approximately 15' wide and 28' long. At the south end of the swale there is a 12" Concrete Pipe (CP). The top of the existing grade around the swale is approximately IT above the IE of the culvert. The culvert conveys stormwater across this property to the adjacent property to the south. Within this property there is also an additional swale that Flows into the above mentioned sump. The swale is to the south of the Parcel "B" fence and begins approximately 50' east of the southeast corner Parcel "B". This swale intercepts stormwater leaving the Parcel "B" property and directs the stormwater to the west to the sump feature. Picture #1 is taken to the east of the sump, looking to the east. This swale is approximately 10' wide and 2' deep with gentle side scopes. The swale is grassed and is stable. C. Description of Stormwater Drainage Across Property#2: Tax Parcel#: "0096": 13814 160th Ave. SE Brett Bowden. Mr. Bowden granted permission to cross his property. Reach 1: A 12" CP conveyance system outfalls from Property 1 to Property 2 adjacent to a large cottonwood stump. The pipe discharges into a short Swale/ditch that is approximately 8' long and 3' wide. The swale is approximately 3' deep with varying side slopes and appears to be stable. At the end of the swale is a 12" CP pipe that conveys stormwater under a gravel road. The IE of the CP to the top pf the gravel road is approximately 2.5'. Reach 2: Stormwater leaves the 12" CP under the gravel road and enters a broad swale. Picture#3 was taken near the upstream culvert under the gravel road looking to the south. The Swale is approximately 110' long, 3' wide at the bottom, approximately 3' deep with varying side slopes. The swale ends at another gravel road. There is a 12" CP at the southern end of the swale where the water is conveyed under the gravel road. Picture #4 was taken at the southern end of Reach 2 looking to the north. D. Description of Stormwater Drainage Across Property#3: Tax Parcel# "0101": The property owner was not home and a card was left at the front door. Reach 1 Stormwater leaving the 12" CP under the gravel road from Property 2, discharges into a shallow ditch on the north side of the driveway access to the Property 3 residence — see Picture #5. The ditch flows for a short distance to the south and then turns to the west — see Picture #6. At the western terminus of the ditch, stormwater is intercepted by a 12" CP that conveys stormwater under the driveway to the south. Picture #7 shows the outfall at the southern side of the gravel drive. The ditch is approximately 2' wide, 1' deep with varying side slopes. There was approximately 2' from invert to the top of the gravel road. There were no observed capacity issues within this reach. Reach 2: Stormwater leaving the 12" CP under the gravel road for Property 3 enters a clearly defined channel/swale that varies in width from 2'to T with side slopes from 3:1 to Flatter. This channel Flows to the southeast. Near the southern property line of this parcel, the channel transitions to a wide, broad swale that matches the existing topography of the land. The identification of a clearly defined drainage feature at this point cannot be distinguished. There are no identified capacity issues within this reach. E. Description of Stormwater-Drainage Across Proerties#4 &#5: Tax Parcels # "0100" & "0116": There was no attempt to contact property owners for this portion of the downstream analysis, as the houses were quite a distance to the west from the area of interest. Stormwater leaving Property 3 enters into a very broad area with no defined drainage features. The ground slopes gently to the southeast. The majority of this area is covered with alders, salmonberries, vine maples and low groundcover. The ground is hummocky. There are tree blow -downs and debris from historic logging activity. The logical direction that stormwater would flow was followed to a point that terminated at an east/west dirt bike trail. There was no defined channel across this trail. It is assumed that this trail was within Property#5. Within this area, there were many dirt bike trails meandering every which way. A route was chosen (to the southeast) to continue the investigation through an area that appeared to be where stormwater would flow in the absence of the dirt bike trails. This route led to an old stream channel. The channel was meandering with a rocky bottom and no water. This channel is within the southeastern portion of Property#5. This channel was followed to a point where it entered Property#6. There are no identified capacity concerns within these properties. F. Descri tion of Stormwater Drainage Across Pro#6: Tax Parcel# "0110": The property owner was contacted for this report. Stormwater enters Property#6 approximately 120' west of the northeast east/west fence line that is assumed to be near the property corner. At this location, there is a 4' high field fencing with 2 strands of barbwire on the top. There is old pink survey flagging attached to the centerline of the stream with the notation "CL Stream". The stream continues to the southeast through the property and leaves the site approximately 80' south of the northeast fence corner. The stream within Property#6 is within a wide broad channel with varying side slopes. There are no identified capacity issues within this property. Attached is the following information: 1. Copies of photos described in this report. _w y � c , �.• N .; Y a�.l v,��� jai ,`�: �, �M '� '�yl f i+ King Country Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 (206) 296-6600 TTY (206) 296-7217 ..... .... . ...... Drop -Off for LUSD ONLY Cover Sheet .......-...... .. Alternative formats available upon request Drop -Off Cover Sheet for Land Use Services Division *kk#*k*k*******4*#*#*****kkk IMPORTANT PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS Project No.: G G3�'�aOSoat: Project Name: 11el_AllrvyG� v 1�i� vaar FROM: Gt.� CaSc Company Name / Contact Berson Telephone No.: Z TO: _ 1_31_vca Date Received by LUSD RECEwj[50 NOV, 2 5 2003 K.C. D.D.E.S. ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat / Plats Please specify item(s) dropped -off: / GT T`Cv Zi ljA e/.1/co �GQI'Gs? „ SGf7cs/« Lot Line Adjustment Permit Please specify item(s) dropped -off: Right of Way Permit Please specify item(s) dropped -off: Clearing / Grading Permit Additional information requested-, please specify item(s) dropped -off: Other: PLEASE NOTE: All drop-off item(s) will be logged into the computer under the project number, therefore, it is important that the top portion of this form is completed properly before you drop-off anything. Assistance in finding a project number can be provided by speaking to a Land Use Services Division Person of the Day (POD) or the Zoning/Land Use Technician. Your cooperation is important. Thank you. LUSD Drop -Off Cover Sheet 1g-cvs-dropofi.pdf 05-30.2002 Page 1 of 1 P.O. BOX 1255 FALL CITY, WA 98024-1255 CELL: 206-227-8187 FAX: 425-228-7232 CASEY ENGINEERING November 20, 2003 Karen Scharer, Planner L.U.S.D. King County D.D.E.S. REFERENCE: Liberty Grove Contiguous, L03P0005, (L03TY401) and Liberty Grove, L03P0006, (L03TY403) SUBJECT: Response to November 12, 2004, Plat Screening, Request For Additional Information Dear Ms. Scharer: On behalf of Lakeridge Development, Inc.,the following is a response to the November 12, 2003 letter. 1. PrORAft Description, Engineering rve in : Attached are three copies of an attached "Waste Disposal Drain Field Easement" that is the only known easement that has not been disclosed at this time. This easement will be relinquished at the time the project is recorded. 2. Drainage•. Attached to this letter are 10 copies of the requested additional downstream information. It is proposed that the combined water quality facility within the project be designed to provide for hydrology to the existing on -site wetland and the existing downstream system. 3. Rezone fs)• The Applicant respectfully requests that the rezone application be withdrawn. This request for the withdrawal of the rezone application was made clear in the August 6, 2003 letter from Lakeridge Development to Karen Sharer. Attached is a copy of the letter that has been already submitted to King County D.D.E.S. STORMWATER HYDRAULIC ANALYSIS CIVIL ENGINEERING DESIGN LAND PLANNING Karen Scharer November 20, 2003 Page 2. Lakeridge Development, Inc. greatly desires to schedule a hearing date at your earliest convince. Thank -you for your consideration. If you have any questions, please feel free to contact me at any time. Sincerely; � � David W. Casey, P.E. Casey Engineering Attachments: 1. 3-Copies of "Waste Disposal Drainfield Easement" Document. 2. 1-Copy of "Plat Screening Transmittal" Document. 3. 1-Copy of August 6, 2003 Letter From Lakeridge Development, Inc. to Karen Scharer — previously submitted. 4. 10-Copies of Requested Additional Downstream Information. Cc: Bruce Whittaker, P.E., King County LUSD,DDES P.O. Box 1255 FALL CITY, WA 98024-1255 CELL: 206-227-8187 FAX: 425-228-7232 CASEY ENGIl�EERING `�'� �1N 0 w . '3 November 20, 2003 jikz8477 Bruce Whittaker, P.E. L.U.S.D. S�NAL' King County D.D.E.S. a x�a��sjj REFERENCE: Liberty Grove Contiguous, L03P0005, (L03TY401) and Liberty Grove, L03P0006, (L03TY403) SUBJECT: Response to November 12, 2004, Plat Screening, Request For Additional Downstream Information Dear Mr. Whittaker: The following is a narrative of the existing downstream system from the Parcel "B" portion of the Liberty site to the Petrie Property. A. Description of stormwater drainage within the Parcel ""B" portion ofproject: The stormwater generated from the site in the existing condition and any stormwater that enters the site from the north (SE 136th St.) flows to an existing wetland at the southern central portion of the property. The wetland is shown on the preliminary plat. Stormwater leaves Parcel "B" at the low point of the wetland and flows to the south. It should be noted that the wetland is not a closed depression. B. Description of Stormwater Drainage Across Property#1: Tax Parcel#: "0095" 13802 160th Ave. SE Steve & Joanne Lee This property is located directly to the south of Parcel "B" of the proposed development. Permission was granted by the property owner to cross this property. Stormwater leaving Parcel "B" (under a wood fence) enters Property#1 and is intercepted by a constructed swale (sump). See Picture#2 that is taken from the STORMWATER HYDRAULIC ANALYSIS CIVIL ENGINEERING DESIGN LAND PLANNING North end of the swale looking south. The swale (sump) is approximately 15' wide and 28' long. At the south end of the swale there is a 12" Concrete Pipe (CP). The top of the existing grade around the swale is approximately 3.5' above the IE of the culvert. The culvert conveys stormwater across this property to the adjacent property to the south. Within this property there is also an additional swale that flows into the above mentioned sump. The Swale is to the south of the Parcel "B" fence and begins approximately 50' east of the southeast corner Parcel "B". This swale intercepts stormwater leaving the Parcel "B" property and directs the stormwater to the west to the sump feature. Picture #1 is taken to the east of the sump, looking to the east. This swale is approximately 10' wide and 2' deep with gentle side slopes. The swale is grassed and is stable. C. Description of Stormwater Drainage Across Property#2: Tax Parcel#: "0096": 13814 160th Ave. SE Brett Bowden. Mr. Bowden granted permission to cross his property. Reach 1: A 12" CP conveyance system outfalis from Property 1 to Property 2 adjacent to a large cottonwood stump. The pipe discharges into a short swale/ditch that is approximately 8' long and 3' wide. The swale is approximately 3' deep with varying side slopes and appears to be stable. At the end of the swale is a 12" CP pipe that conveys stormwater under a gravel road. The IE of the CP to the top pf the gravel road is approximately 2.5'. Reach 2: Stormwater leaves the 12" CP under the gravel road and enters a broad swale. Picture#3 was taken near the upstream culvert under the gravel road looking to the south. The swale is approximately 110' long, 3' wide at the bottom, approximately 3' deep with varying side slopes. The swale ends at another gravel road. There is a 12" CP at the southern end of the swale where the water is conveyed under the gravel road. Picture #4 was taken at the southern end of Reach 2 looking to the north. D. Description of,Stormwater Drainage Across Property#3: Tax Parcel# "0101": The property owner was not home and a card was left at the front door. Reach 1: Stormwater leaving the 12" CP under the gravel road from Property 2, discharges into a shallow ditch on the north side of the driveway access to the Property 3 residence — see Picture #5. The ditch flows for a short distance to the south and then turns to the west -- see Picture #6. At the western terminus of the ditch, stormwater is intercepted by a 12" CP that conveys stormwater under the driveway to the south. Picture #7 shows the outfall at the southern side of the gravel drive. The ditch is approximately 2' wide, 1' deep with varying side slopes. There was approximately 2' from invert to the top of the gravel road. There were no observed capacity issues within this reach. Reach 2: Stormwater leaving the 12" CP under the gravel road for Property 3 enters a clearly defined channel/swale that varies in width from 2' to T with side slopes from 3.1 to flatter. This channel flows to the southeast. Near the southern property line of this parcel, the channel transitions to a wide, broad Swale that matches the existing topography of the land. The identification of a clearly defined drainage feature at this point cannot be distinguished. There are no identified capacity issues within this reach. E. Description of Stormwater Drainage Across PEQpgrtiies#4 &#5: Tax Parcels # "0100" & "0116": There was no attempt to contact property owners for this portion of the downstream analysis, as the houses were quite a distance to the west from the area of interest. Stormwater leaving Property 3 enters into a very broad area with no defined drainage features. The ground slopes gently to the southeast. The majority of this area is covered with alders, salmonberries, vine maples and low groundcover. The ground is hummocky. There are tree blow -downs and debris from historic logging activity. The logical direction that stormwater would flow was followed to a point that terminated at an east/west dirt bike trail. There was no defined channel across this trail. It is assumed that this trail was within Property#5. Within this area, there were many dirt bike trails meandering every which way. A route was chosen (to the southeast) to continue the investigation through an area that appeared to be where stormwater would flow in the absence of the dirt bike trails. This route led to an old stream channel. The channel was meandering with a rocky bottom and no water. This channel is within the southeastern portion of Property#5. This channel was followed to a point where it entered Property#6. There are no identified capacity concerns within these properties. F. Description of Stormwater Drainage Across Pro #6: Tax Parcel# "0110": The property owner was contacted for this report. Stormwater enters Property#6 approximately 120' west of the northeast east/west fence line that is assumed to be near the property corner. At this location, there is a 4' high field fencing with 2 strands of barbwire on the top. There is old pink survey flagging attached to the centerline of the stream with the notation "CL Stream". The stream continues to the southeast through the property and leaves the site approximately 80' south of the northeast fence corner. The stream within Property#6 is within a wide broad channel with varying side slopes. There are no identified capacity issues within this property. Attached is the following information: 1. Copies of photos described in this report. r O King County Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 (206) 296-6600 TTY (206) 296-7217 Drop -Off for LUSD ,ONLY - Cover -Sheet Alternative formats available upon request Drop -Off Cover Sheet for Land Use Services Division IMPORTANT k#*#*******kk##*k**k****kkk*k PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS Project No.: G G 3�G40S��G.3�GaGG Project Name: FROM: 1_2,,s W Company Name / Contact Person Telephone No,: 0 aO— ZZ,7 TO: 131-41GG GI/�7• ��d�G r" RF.cfEwF.D NOV. 2 5 2003 K.C. D.D.E.S. ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat ! Plats Please specify item(s) dropped -off: C ,C , a � G���s- ivc•r /G4i-ten Sc�i�r« Lot_ Line Adjustment Permit Please specify item(s) dropped -off: Right of Way Permit Please specify item(s) dropped -off: Clearing 1 Gradinq Permit Additional information requested; please specify item(s) dropped -off: Other: PLEASE NOTE: All drop-off item(s) will be logged into the computer under the project number, therefore, it is important that the top portion of this form is completed property before you' drop-off anything. Assistance in finding a project number can be provided by speaking to a Land Use Services Division Person of the Day (POD) or the Zoning/Land Use Technician. Your cooperation is important. Thank you. LUSD Drop -Off Cover Sheet Ig-cvs-dropoff.pdf 05-30-2002 Page 1 of 1 JOHN* 112a November 20, 2003 Karen Scharer, Planner L.U.S.D. King County D.D.E.S. P.O. BOX 1255 FALL CITY, WA 98024-1255 CELL: 206-227-8187 FAX: 425-228-7232 REFERENCE: Liberty Grove Contiguous, L031`0005, (L03TY401) and Liberty Grove, L03P0006, (L03TY403) SUBJECT: Response to November 12, 2004, Plat Screening, Request For Additional Information Dear Ms. Scharer: On behalf of Lakeridge Development, Inc.,the following is a response to the November 12, 2003 letter. 1. PrOReMi Description, Engineering & Surveying: Attached are three copies of an attached "Waste Disposal Drain Field Easement" that is the only known easement that has not been disclosed at this time. This easement will be relinquished at the time the project is recorded. 2. Drainage: Attached to this letter are 10 copies of the requested additional downstream information. It is proposed that the combined water quality facility within the project be designed to provide for hydrology to the existing on -site wetland and the existing downstream system. 3. Rezones The Applicant respectfully requests that the rezone application be withdrawn. This request for the withdrawal of the rezone application was made clear in the August 6, 2003 letter from Lakeridge Development to Karen Sharer. Attached is a copy of the letter that has been already submitted to King County D.D.E.S. STORMWA TER HYDRAULIC ANALYSIS CIVIL ENGINEERING DESIGN LAND PLANNING Karen Scharer November 20, 2003 Page 2. Lakeridge Development, Inc. greatly desires to schedule a hearing date at your earliest convince. Thank -you for your consideration. If you have any questions, please feel free to contact me at any time. Sincerely; A,--" 6;7 David W. Casey, P.E. Casey Engineering Attachments: 1.3-Copies of "Waste Disposal Drainfield Easement' Document. 2. 1-Copy of "Plat Screening Transmittal" Document. 3. 1-Copy of August 6, 2003 Letter From La.keridge Development, Inc. to Karen Scharer — previously submitted. 4. 10-Copies of Requested Additional Downstream Information. Cc: Bruce Whittaker, P.E., King County LUSD,DDES November 20, 2003 Bruce Whittaker, P.E. L.U.S.D. King County D.D.E.S. REFERENCE SUBJECT: Dear Mr. Whittaker: OIL P.O. BOX 1255 FALL CITY, WA 98024-1255 CELL: 206-227-8187 FAX: 425-228-7232 � W. 28477 EXPIRES ,2 /j -QS- Liberty Grove Contiguous, L03P0005, (L03TY401) and Liberty Grove, L03P0006, (L03TY403) Response to November 12, 2004, Plat Screening, Request For Additional Downstream Information The following is a narrative of the existing downstream system from the Parcel "B" portion of the Liberty site to the Petrie Property. A. Description of stormwater drainage within the Parcel "B"portion of project; The stormwater generated from the site in the existing condition and any stormwater that enters the site from the north (SE 136th St.) flows to an existing wetland at the southern central portion of the property. The wetland is shown on the preliminary plat. Stormwater leaves Parcel "B" at the low point of the wetland and flows to the south. It should be noted that the wetland is not a closed depression. B. Description of Stormwater Drainage Across Proa #1: Tax Parcel#: "0095" 13802 16e Ave. SE Steve & Joanne Lee This property is located directly to the south of Parcel "B" of the proposed development. Permission was granted by the property owner to cross this property. Stormwater leaving Parcel "B" (under a wood fence) enters Property#1 and is intercepted by a constructed swale (sump). See Picture#2 that is taken from the STORMWATE.R HYDRAULIC ANALYSIS CIVIL ENGINEERING DESIGN 19 f17�1_►1hl►Il►Ls� North end of the swale looking south. The swale (sump) is approximately 15' wide and 28' long. At the south end of the swale there is a 12" Concrete Pipe (CP). The top of the existing grade around the Swale is approximately IT above the IE of the culvert. The culvert conveys stormwater across this property to the adjacent property to the south. Within this property there is also an additional swale that flows into the above mentioned sump. The swale is to the south of the Parcel "B" fence and begins approximately 50' east of the southeast corner Parcel "B". This swale intercepts stormwater leaving the Parcel "B" property and directs the stormwater to the west to the sump feature. Picture #1 is taken to the east of the sump, looking to the east. This swale is approximately 10' wide and 2' deep with gentle side slopes. The swale is grassed and is stable. C. Description of Stormwater Drainage Across Property#2: Tax Parcel#: "0096": 13814 160tn Ave. SE Brett Bowden. Mr. Bowden granted permission to cross his property. Reach 1: A 12" CP conveyance system outfalls from Property 1 to Property 2 adjacent to a large cottonwood stump. The pipe discharges into a short swale/ditch that is approximately 8' long and 3' wide. The swale is approximately 3' deep with varying side slopes and appears to be stable. At the end of the swale is a 12" CP pipe that conveys stormwater under a gravel road. The IE of the CP to the top pf the gravel road is approximately 2.5'. Reach 2: Stormwater leaves the 12" CP under the gravel road and enters a broad swale. Picture#3 was taken near the upstream culvert under the gravel road looking to the south. The swale is approximately 110' long, 3' wide at the bottom, approximately 3' deep with varying side slopes. The swale ends at another gravel road. There is a 12" CP at the southern end of the swale where the water is conveyed under the gravel road. Picture #4 was taken at the southern end of Reach 2 looking to the north. D. Description of Stormwater Drainage Across Property#3: Tax Parcel# "0101": The property owner was not home and a card was left at the front door. Reach 1: Stormwater leaving the 12" CP under the gravel road from Property 2, discharges into a shallow ditch on the north side of the driveway access to the Property 3 residence — see Picture #5. The ditch flows for a short distance to the south and then turns to the west — see Picture #6. At the western terminus of the ditch, stormwater is intercepted by a 12" CP that conveys stormwater under the driveway to the south. Picture #7 shows the outfall at the southern side of the gravel drive. The ditch is approximately 2' wide, 1' deep with varying side slopes. There was approximately 2' from invert to the top of the gravel road. There were no observed capacity issues within this reach. Reach 2: Stormwater leaving the 12" CP under the gravel road for Property 3 enters a clearly defined channel/swale that varies in width from 2' to S' with side slopes from 3:1 to flatter. This channel flows to the southeast. Near the southern property line of this parcel, the channel transitions to a wide, broad swale that matches the existing topography of the land. The identification of a clearly defined drainage feature at this point cannot be distinguished. There are no identified capacity issues within this reach. E. Description of Stormwater Drainage Across Proerties#4 &#5: Tax Parcels # "0100" & "0116": There was no attempt to contact property owners for this portion of the downstream analysis, as the houses were quite a distance to the west from the area of interest. Stormwater leaving Property 3 enters into a very broad area with no defined drainage features. The ground slopes gently to the southeast. The majority of this area is covered with alders, salmonberries, vine maples and low groundcover. The ground is hummocky. There are tree blow -downs and debris from historic logging activity. The logical direction that stormwater would flow was followed to a point that terminated at an east/west dirt bike trail. There was no defined channel across this trail. It is assumed that this trail was within Property#5. Within this area, there were many dirt bike trails meandering every which way. A route was chosen (to the southeast) to continue the investigation through an area that appeared to be where stormwater would flow in the absence of the dirt bike trails. This route led to an old stream channel. The channel was meandering with a rocky bottom and no water. This channel is within the southeastern portion of Property#5. This channel was followed to a point where it entered Property#6. There are no identified capacity concerns within these properties. F. Description of Stormwater Drainage Across Propgrty#& Tax Parcel# "0110": The property owner was contacted for this report. Stormwater enters Property#6 approximately 120' west of the northeast east/west fence line that is assumed to be near the property corner. At this location, there is a 4' high field fencing with 2 strands of barbwire on the top. There is old pink survey flagging attached to the centerline of the stream with the notation "CL Stream". The stream continues to the southeast through the property and leaves the site approximately 80' south of the northeast fence corner. The stream within Property#6 is within a wide broad channel with varying side slopes. There are no identified capacity issues within this property. Attached is the following information_ 1. Copies of photos described in this report. lxi` t P_h1i(MfAk".•154. -� ' � `l.,t ,f �',S + 1r.. ,-: �+ t � ' G ,.\s���\\\>� \\. �� . ; \ ` < � . �\&��/\\y\ \` . : .! , ? �& z �\ , \./.2z ��\, Ile 11 dens' Alliance for a Responsible Evendell Box 2936 ,ce`nton, WA 98056 %hlghlands_neighbors@hohnail.com ' RECEIVED Mr. Stafford Smith Hearing Examiner JAN 16 King County Hearing Examiner's Office UjYTY 400 Yesler Way - Suite 404 ,ARINa E AMIr4 Seattle WA 98104 XAMIAtER Fax. 206.296.1654 January 14, 2004 RE: Liberty Grove Conti uous/Libert Grove - DDES Files L03P0005IL03TY401 and L03P0006103TY403 Dear Mr. Examiner, With- this letter, Citizens' Alliance for a Responsible Evendell (C.A.R.E.), a Washington State non-profit corporation, petitions the King County Hearing Examiner's Office to i0tervene on behalf of the oommuni in the matter of the Liberty Grove Contiguous/Liberty Grove applications listed abov . s. High willspeak for ....t in this matter. If a Pre -Hearing Conference is necessary to formally submit and decide this petition, please consider this correspondence a request of a Pre -Wearing Conference. We anticipate the ability to accommodate scheduling of your convenience. C.A.R.E. and its members would be density t ey remest thojah Tr@n1Wr gi Qgnaifm fliabW (TDR)is approved. We are primarily interested in ensuring coordinated and responsible development of the community consis en wi h state and local laws and regulations aimed at ensuring that development does not exceed infrastructure capacity, including transportation capacity. C.A..R.E. and its members are further concerned with preserving the character aW scale21 tLe communi , which the County has consistently zoned R-4(gross) and the City of Renton has recently re -zoned to R-4 (n , n recognition of the many physical difficulties that would go along with providing increased infrastructure capacity to serve higher density development in the area. We oppose the requested increase in density, but in the event that TDR may be approved, we hope to ensure that the resulting impacts are balanced with other county goals and policies, and are adjusted to the specific conditions of the subject sites. C.A.R.E. and its members are also concerned with protecting against physical damage to existing residences and properties as a result of site preparation, construction and use associated with these developments; including the avoidance of potential d r oo ing as a result of the subject development. Such impacts would harm C.A.R.E. members' interests in pro acting their property values, along with their privacy and the quiet enjoyment of their property. 'rhe original of this document is being forwarded to your office today via US Mail. Thank you for your time and attention. d2��Vt Gwendolyn High President ATA(?+l E% : CI J91C Nu.)sF_ V_ S UST uy PAIICE-L #s