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HomeMy WebLinkAboutReport 11 EXISTING ROADWAY CONDITIONS PHOTO EXHIBIT Wehrman Preliminary Plat King County, Washington Submitted to: King County Department of Development and Environmental Services Land Use Services Division Submitted by: Trinity Land Development, L. L.C. Prepared by: Barghausen Consulting Engineers, Inc. November 17, 2005 Our Job No. 11418 ¢&HAU CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES m Z 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX c 7 BRANCH OFFICES ♦ OLYMRIA, WA ♦ TEMECULA, CA ♦ WALNUT CREEK, CA s www.barghausen.com G�r'�G ENGtN�P�- zj���w;IeO7'r 1 Photo 1: Looking west down S.E. 188th Street from the Wehrman Property Photo 2: Looking east down S.E. 188th Street Photo 3: Looking north down 120th Avenue S.E. at its intersection with S.E. t88th Street Photo 4: Looking west down S.E. 188th Street at its intersection with 120th Avenue S.E. PA R• , i L - M� r+ t I 7"- 77 �wx v. � ;� v?+.'- L a g � . • i,:a .i �' +ir+s'y iS�"� � (� �.'�� pia,+,° £. � h y�. i ; • '. 6' - r . e -�'�� �iif�e 3t''� 'e�� �"5 gk*`r �* k r, r. _ _ .✓ a .y, .N.'IY R • _ 1 1 1 1 1 i Photo 9: Looking north down 116th Avenue S.E. from its intersection with S.E. 118th Street W7, w.. - �'. la -p;�i ., F� �� Ali • i.- . :�11"✓.IRS' .- t`. ?'�S�r y � _ � �I` r �. r� 1i R' yjAL * � r ♦ 'tii C Renton School District 300 SW 7th St. Renton, WA 98055 Phone: 425-204-2300 HIGH SCHOOL & MIDDLE SCHOOL 77t BOUNDARIES :.. J'AN 17 Zoub K D D Lake Washington Di.itMid cn to n igih Sc oil da 1. hod Attenda e Area oN Ch Akj wo Sw 7.h St GIdq 0 1w SK �"t. Win RE 4 Renton.,High chool & Dimmi'kt mici le School Attendance rea Hazen High School & McKnight Middle School;R Attendance Area 41 Sl Hazen High School & McKnight Middle School Attendance Area 0/— SRI Lindbergh High School & Nelsen Middle School Attendance Area SC 'fi6tr St �elronkSY Rd wnw Li Benson KII Elementary School 18665 11 6th Ave 5E d� Renton, WA 98058 Phone: 425-204-3300 41-5 ri E. N 2004-2005 SCHOOL YEAR. LIMITED TRANSPORTATION STOPS SCHOOL: LINDBERGH HIGH SCHOOL Regular stop location SE 182ND ST & 109TH AV SE 3000 SE RYL HILLS DR SE 186TH ST & 109TH AV SE SE 184TH ST & 120TH AV SE Emersency stop location 116TH AV SE & SE 182ND ST ROYAL HILLS DR & LK YOUNGS WY 116TH AV SE & SE 186TH ST 116TH AV SE & SE 184TH ST IMPORTANT!! - DEVELOP A FAMILY PLAN Each family should have a plan covering what to do when children arrive home early due to an emergency situation. Situations, which should be covered, include: • Are the students prepared with warm clothing, including gloves, hats, and boots? • What is the best route home if your student cannot be delivered to the normal or limited transportation bus stop? • Where could they go if they needed help? • Is there someone your child could call to allay fears? 2004-2005 SCHOOL YEAR LIMITED TRANSPORTATION STOPS SCHOOL: NELSEN_MIDDLE SCHOOL Regular stop location 131ST PL SE & SE 159TH ST SE 16TH PL & NEWPORT CT SE SE 188TH ST & 120TH AV SE SE 184TH ST & 120TH AV SE 136TH PL SE & SE 170TH ST PIERCE AV SE & SE 19TH CT SE 168TH ST & 133RD PL SE 3000 ROYAL HILLS APTS (TURN AROUND) SE 158TH ST & SE 159TH PL SE 156TH ST & 140TH PL SE 138TH PL SE & SE 158TH ST 18659 110TH PL SE (SP) SE 16TH ST & GLENNWOOD AV SE (SP) 8416 S 123RD PL (SP) 3000 SE RYL HILLS DR (SP) 1111 EAGLE LA (SP) 12941 SE 159TH ST (SP) S 114TH ST & CORNELL AV S (SP) Emeracncy stop location FAIRWOOD BLVD & 132ND AV SE TIFFANY PARK 116TH AV SE & SE 188TH ST 116TH AV SE & SE 184TH ST 140TH AV SE & SE 171ST PL TIFFANY PARK FAIRWOOD BLVD & 132ND AV SE ROYAL HILLS DR SE & SE LK YOUNGS WY 140TH WY SE & SE 158TH ST 140TH WY SE & SE 158TH ST 140TH WY SE & SE 158TH ST 116TH AV SE & SE 186TH ST TIFFANY PARK THOMSON SCHOOL ROYAL HILLS DR SE & SE LK YOUNGS WY EAGLE RIDGE DR & S 18TH ST TIFFANY PARK LAKERIDGE IMPORTANTU - DEVELOP A FAMILY PLAN Each family should have a plan covering what to do when children arrive home early due to an emergency situation. Situations, which should be covered, include: • Are the students prepared with warm clothing, including gloves, hats, and boots? • What is the best route home if your student cannot be delivered to the normal or limited transportation bus stop? • Where could they go if they needed help? Is there someone your child could call to allay fears? King County Department of Development and Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 October 6, 2005 Clark McGowan Trinity Land Development LLC 310 29" St. NE Puyallup, WA 98372 RE: Notice of Request for Additional Information or Studies Application No. L04P0027 - Wehrman Dear M: 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.: Chad Tibbits, Project Manager II, 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. The deadline for the submittal of the necessary information is January 3, 2006. 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 Chad Tibbits at (206) 296-7194. Sincerely, Kim Claussen, Project Manager III Current Planning Section Cc: Barghausen Consulting Engineers, Attn: Ivana Halverson w/enc Chad Tibbits, Planner, Current Planning Section, LUSD w/enc Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD w/enc Kris Langley, Senior Engineer, Traffic & Engineering Section, KCDOT w/enc Application File w/enc . Plat Screening Transmittal King County Preliminary Plat Application of Wehrman Department of Development LUSD File No, L04P0027 and Environmental Services Land Use Services Division Date of Information Request: October 6, 2005 9000akcsdaleAvenue Southwest Deadline for Submittal of Information: January 3, 2006 Renton, Washington 98055-1219 Please provide ten (10) copies of the following, unless otherwise noted. Drainage: The following information must be prepared and stamped by a civil engineer licensed in the State of Washington. • Please revise the level 1 off -site analysis to reflect the current proposal. The narratives and maps appear include parcels not included in the proposal boundaries. • Please address off -site upland flow to the site from the west. The level 1 analysis and subbasin maps should show the upstream flow. Note, we found flows from the west in the ditch on SE 188th St., sheet flow from the west and concentrated flow from the southwest corner. Revise the conceptual drainage plan as needed to address the upstream flow. • Please show the 100-year floodplain for any streams and/or wetlands that affect the site. • Include site cross sections referenced on the preliminary site grading plan. • Revise the conceptual drainage plan to address frontage and off -site road improvements • Provide preliminary calculations to show the proposed sizing of all the detention facilities. Geotechnical: Provide a geotechnical report prepared by a qualified geotechnical engineer and/or engineering geologist who is licensed in the State of Washington. • The geotechnical report must include an evaluation of possible future landslides on this site. • Prepare at least one cross-section located at or between Sections A & B on the site plan received by DDES on December 14, 2004, that shows the subsurface stratigraphy to a depth of at least 50 feet below the ground surface. The section should also show groundwater conditions, and the type, continuity and approximate strength of the soils. It is expected that at least two exploratory borings drilled to a depth of 50 feet will be needed. Prepare a detailed slope stability analysis, if determined to be necessary, after completing the initial site studies. Roads/Traffic: • Provide a TIA with a calculation of the AM and PM peak period levels -of -service for the 188tn/120th intersection, with and without the connection to the plat of Fleuve des Voiles (L04P0002), and evaluation of turn lanes at the SE 192nd Street/120th Avenue SE intersection (PM peak hour only). • Provide field verification of entering and stopping sight distance(s) at the intersection of SE 188th/ 1201h Avenue SE, and proposed stopping sight distance at the intersection of SE 188th and 123rd (north -south plat street) per 1993 KCRS, Wehrman — L04P0027 10/05 • - Please provide the easement or right-of-way documents which demonstrate the legal authority to construct the off -site road improvements to the west. Letters of intent from affected property owner(s) is required if existing documentation does not exist • Include cross section details plan and profile (vertical alignment) of the off -site and frontage road improvement. Details of the proposed road fill and preliminary geotechnical recommendations is required. A property owner letter of intent for construction of the road fill is required • Provide an offsite road inventory and right-of-way evaluation to verify appropriate access to the site. Walkways: Provide an inventory map (i.e. existing conditions - widths, surface type, etc.) of the walking routes to the elementary, junior high/middle and high school and/or the appropriate bus stop location associated with each school. The school sites for the proposed subdivision are Benson Hill Elementary, Nelsen Middle School and Lindberg High. Identify any improvements necessary to provide safe walking conditions Recreation Space: Demonstrate how the proposed location of the recreation tract is consistent with the requirements of KCC 21A.14.180-200 (i.e. centrally located, road frontage, etc.). Submit a conceptual recreation plan which indicates the type of improvements (i.e. sport court, play structure, benches, landscaping, etc.) proposed within the recreation tract. See KCC 21A.14.180 E2 for equipment requirements Revised Preliminary Plat: Provide 25 copies of a revised preliminary plat, as necessary, as a result of above - referenced requests for additional information. 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. Wehrman — L04P0027 10/06 King County Department of Development and Environmental Services 900 aakesdale Avenue SW Renton, WA 98055-1219 February 9, 2006 Trinity Land Development, LLC Attn. Clark McGowan 310 29" Street NE Puyallup, WA 98372 RE: Notice of Request for Additional Information or Studies Application No. L04P0027— Wehrman Subdivision Date Filed: December 14, 2004 Date of Complete Application: January 11, 2005 Dear Mr. McGowan: 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.: Chad Tibbits, Project Manager II, 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 mote that the supplemental information required after vesting of a complete application shall not affect the validity of such application. The deadline for the submittal of the necessary information is May 9, 2006. 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- 7194. SincITibb ChaProject/Program Manager 11 Current Planning Section Cc, Barghausen Consulting Engineers, Attn. Ivana Halverson 18215 72"d Avenue S., Kent, WA 98032 Kim Claussen, Project/Program Manager III, Current Planning Section, LUSD w/enc Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD wlenc Kristen Langley, Senior Transportation Engineer, LUSD w/enc Larry West, Environmental Scientist lll, Critical Areas Section, LUSD w/enc Application File w/enc 1 V C>" 0.i3. T_ k-..f � — ) �— r— C 1rZ `C Y--V- 1'_ I J?�" u L-F-- . � Plat Screening Transmittal .. King county Preliminary Plat Application of Wehrman Deparnnent of Development LUSD File No. L04P0027 and Environmental Services Land use Services Division Date of Information Request: February 9, 2006 WO Oakesdale Avenue Southwest Deadline for Submittal of Information: May 9, 2006 Renton, Washington 98055-1219 y Please provide five (5) copies of the following, unless otherwise noted. f .� Z_ c Drainage: a Please evaluate the offsite upstream flow entering the site across the west boundary. Revise the V conceptual drainage to provide provisions for this flow and a future connection for properties to the west. Roads: Include a conceptual offsite walkway improvement plan for the proposed walkway improvements. • Please provide a detailed (1" = 40' or greater) offsite roadway inventory identifying roadway widths (at regular intervals) including both traveled -ways and shoulders (and including shoulder type and surfacing), and existing constraints: utility poles, driveway culverts and roadside ditches, etc. to widening for the required school walkways. • The preliminary recommendation for the off -site school walkway is a full -width paved shoulder (or sidewalk) from the subdivision boundary to the intersection of SE 1881h/120`h Avenue SE (the common point for walkways to the high school bus stop and the walkway to Benson Hills Elementary, and the bus stop for middle school students), and a combination of full -width paved shoulders or separated h��paved walkway (minimum width: 5 feet) from that intersection to (a) the SE 1881h Street/1161h Avenue ✓� SE intersection (Benson Hill Elementary students) and (b) the Lindberg High bus stop at SE 184"/120th Avenue SE. Additional pavement should be provided at the SE 188th/120th Avenue SE intersection to ce , provide a waiting area for students to assemble while waiting for the bus and/or crossing the street. Critical Areas: • Rockeries on the site plan appear to be too high and too close to the setbacks and should be revised accordingly. • It would appear there is not an appropriate setback from the slope in several instances where the slope was created with fill, please explain and revise as necessary. �• What is the purpose of the retaining wall along the drainage facility? How is the retaining wall being integrated into the drainage facility? • It would appear that a 2:1 slope occurs in dense sandy soils where standing water occurring could result in deteriorating of the slope and/or the wall. Please review this situation and provide a narrative. + For questions concerning Critical Areas please contact Larry West, Environmental Scientist III at (206) 296-7131. Revised Preliminary Plat: Provide 25 copies of a revised preliminary plat, as necessary, as a result of above - referenced requests for additional information. 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, Wehrman — L04P0027 02/06 �f LJZjCr-� �L t��� 7�7 1ca,�� '--'�rsrr d��i•� L.��r$ �� 4E-- 5C ���� Go.�y?; 1ft� �j� �Z�C��t►`L `' +i tiptl_) I Sihv- ��j Q� Icing County DDES LAND USE SERVICES DIVISION 900 Oakesdale Avenue Southwest Renton, WA 98055 DROP-OFF FOR LUSD ONLY Cover Sheet Portion Below MUST BE complete for all drop-off to KC LUSD Stab' Project No. LD 00402 Project Name W e_/4 2 LJ FROM. _Barghausen Consulting Engineers / Ivan Halvorsen Company Name I Contact Person Telephone No. (425) 251-6222 TO: 6k4=d Ti b Date Received by LUSD JAN 17 2006 K.G. p0•E'S' ADDITIONAL INFORMATION REQUESTED BY KC STAFF Short Plat/Plats Lot Line Adjustment Permit Piease specify item(s) drop-off Ri ht ot Way Permit Please specify item(s) drop-off Gradin&Clearing Permit Additional Inf. requested, please specify item(s) drop-off Other: *****NOTE***** If what you are dropping off is not given on this cover sheet, then please check with a Land Use Technician or our POD. He/she can assist you in determining whom the drop-off should go to, within the Land Use Services Division_ CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES January 16, 2006 COURIER DELIVERY Chad Tibbits King County Department of Development and Environmental Services 900 Oakesdale Avenue S.W. Renton, WA 98055-1219 RE: Submittal of Revised Plans and Documents Wehrman Preliminary Plat King County File No, L04P0027 Our Job No. 11418 Dear Chad: We have revised the plans and documents for the project referenced above in accordance with your comment letter dated October 6, 2005. Enclosed are the following documents for your review and approval. 1. Ten (10) copies of the corrected Level 1 Off -Site Analysis prepared by Barghausen Consulting Engineers, Inc., dated November 9, 2005 2. Ten (10) copies of the Geotechnical Engineering Study prepared by Earth Consultants, Inc., dated December 22, 2005 3. Ten (10) copies of the Traffic Impact Analysis prepared by Heath & Associates, Inc., dated November 2005 4. Twenty-five (25) copies of the revised preliminary plat plan set 5. Ten (10) copies of the Neighborhood Analysis 6. Ten (10) copies of the Statutory Warranty Deed from Jay and Frances Holmgren to Holmgren, L.L.C. 7. Ten (10) copies of the Renton School District Maps and School Bus Stops The following outline provides each of your comments in italics exactly as written, vpka 1ve 11 response describing how each comment was addressed: Drainage: Thefollowing information must be prepared and stamped by a civil 2 : e r l eed in the state of Washington - Please revise the level 1 off -site analysis to reflect the current proposal h" , reaps appear include parcels not included in the proposal boundaries. l '._'; I1i _; lu �i Response: Please see the enclosed revised Level One Drainage Analysi . JAN 17 2005 K.C. D.D.E.S. 18215 72ND AVENUE SOUTH KENT, WA 98932 (425) 251-6222 (425) 251-8782 FAX � �Ipw) BRANCH OFFICES • OLYMPIA, WA ♦ TEMECULA, CA ♦ WALNUT CREEK, CA www.barghausen.com Chad Tibbits King County Department of Development and Environmental Services -2- . January 16, 2006 Please address off -site upland flow to the site from the west. The level 1 analysis and subbasin maps should show the upstream flow. Note, we found flows from the west in the ditch on SE 18? St., sheet flow from the west and concentrated flow from the southwest corner. Revise the conceptual drainage plan as needed to address the upstream flow. Response: The maps have been revised to reflect the upstream flow area. Please see the Preliminary Grading and Drainage Plan (Sheet 2), which depicts an upstream storm drainage collection and conveyance system at the toe of the proposed 2:1 slope and/or behind the proposed rockery/retaining walls. • Please show the 100-year floodplain for any streams and/or wetlands that affect the site. Response: The areas of site development are well above the 100-year flood inundation limits of the wetland along the property's east boundary. The 100-year flood plain limits will be analyzed and provided with construction engineering plans. Include site cross sections referenced on the preliminary site grading plan. Response: Please see Sheet 3 for site cross -sections depicting the proposed condition after site development. Houses will be "tuck -under" and "daylight basement" designed units to limit grading as much as possible. * Revise the conceptual drainage plan to address frontage and off -site road improvements. Response: The Preliminary Grading and Drainage Plan addresses off -site road improvements. The existing roadside ditch along S.E. ISSth Street will flow into a new bypass pipe and catch basin system that will convey off -site storm water to the existing surface flow path off -site to the north. * Provide preliminary calculations to shorn the proposed sizing of all the detention facilities. Response: Please see Appendix, Exhibit i in the Level One Drainage Analysis for the preliminary sizing for the detention facilities. Geotechnical: Provide a geotechnical report prepared by a qualified geotechnical engineer and/or engineering geologist who is licensed in the State of Washington. ■ The geotechnical report must include an evaluation of possible future landslides on this site. Response: Please see the enclosed Geotechnical Engineering Study prepared by Earth Consultants, Inc. • Prepare at least one cross-section located at or between Sections A & B on the site plan received by ODES on December 14, 2004, that shows the subsurface stratigraphy to a depth of at least 50 feet below the ground surface. The section should also show groundwater Chad Tibbits King County Department of Development and Environmental Services -3- January 16, 2006 conditions, and the type, continuity and approximate strength of the soils. It is expected that at least two exploratory borings drilled to a depth of 50 feet will be needed. Response: Please see the enclosed Geotechnical Engineering Study Earth Consultants, Inc. Plate 2 shows test pit locations, Plates 3 and 4 are cross sections showing the soil layers found to be present on the site. Note that the soil conditions observed by Earth Consultants, Inc. are consistent with the geologically mapped soil designations. • Prepare a detailed slope stability analysis, if determined to be necessary, after completing the initial site studies. Response: Please see the enclosed Geotechnical Engineering Study prepared by Earth Consultants, Inc. There are limited areas of steep slopes of 40 percent or greater, however per KCC 21A.24.310F.1, these slopes are exempt as they are less than 20 feet high and (per the Geotechnical Engineering Study prepared by Earth Consultants, Inc.) will be stable with site development. Roads/Traffic: Provide �ar 77A with a calculation of the AM and PM peak period levels -of -service for the 188ih%12V h intersection, with and without the connection to the plat of Fleuve des Voiles (L04P0002), and evaluation of turn lanes at the SE 192"`1 Streetl120'h Avenue SE intersection (PM peak hour only). Response: Please see the enclosed Traffic Impact Analysis (TIA), prepared by Heath & Associates, Inc., Section IV.D, which shows that the intersection of 120th Avenue S.E. and S.E. 188th Street is expected to operate at LOS A-D in 2007 both with and without the project. Assuming a connection through the Fleuve des Voiles plat improves the future LOC to A-C. Section IV.E of the TIA finds that left turn lane warrants at the intersection of 120th Avenue S.E. and S.E. 192nd Street are not met with the proposed subdivision. Provide field verifieation of entering and stopping sight distance(s) at the intersection of SE I88`h/120`h Avenue SE, and proposed stopping sight distance at the intersection of SE 188`h and 123rd (north -south plat street) per 1993 KCRS. Response: Please see the Road Profiles and Cross Sections Plan (Sheet 3) for the proposed stopping sight distance conditions on the extension of S.E. 188th Street and the proposed on - site street, Road A. Barghausen Consulting Engineers, Inc., field evaluated entering sight distance (ESD) at the intersection of 120th Avenue S.E. and S.E 188th Street. The speed limit on 120th Avenue S.E. is posted at 25 miles per hour (mph) and, per Table 2.2 of the 1993 King County Road Standards (KCRS), has a design speed of 35 mph. The required ESD for a 35 mph design Chad Tibbits King County Department of Development and Environmental Services 4- January 16, 2006 speed roadway is 490 feet. At a distance 10 feet from the travel lane of the intersecting roadway, ESD is measured from a height of 3.5 feet (eye height) to see an approaching vehicle 4.5 feet high. Barghausen Consulting Engineers, Inc., measured more than 500 feet of ESD in both the north and south directions for a stopped vehicle waiting to turn onto or cross 120th Avenue S.E. from S.E. 188th Street. Please provide the easement or right-of-way documents which demonstrate the legal authority to construct the off -site road improvements to the west. Letters of intent from affected property owner(s) is required if existing documentation does not exist. Response: Trinity Land Development now owns the property to the west (parcel no 619900- 0099) as Holmgren L.L.C. Enclosed is a copy of the Statutory Warranty Deed from Jay and Frances Holmgren to Holmgren, L.L.C. • Include cross section details plan and profile (vertical alignment) of the off -site and frontage road improvement. Details of the proposed road fill and preliminary geotechnical recommendations is required. A property owner letter of intent for construction of the road fill is required Response: Please see the enclosed plan set that provides cross sections and profiles for the extension of S.E. 188th Street and the new Road A. Provide an offsite road inventory and right-of-way evaluation to verify appropriate access to the site. Response: Please see the enclosed Neighborhood Map that provides an inventory of existing roadway conditions in the area. The neighborhood has generally 20-22 feet of asphalt drivable surface, which meets the requirements for access. Walkways: Provide an inventory map (i.e. existing conditions -- widths, surface type, etc.) of the walking routes to the elementary, junior higWmiddle and high school and/or the appropriate bus stop location associated with each school. The school sites for the proposed subdivision are Benson Hill Elementary, Nelsen Middle School and Lindberg High. Identify any improvements necessary to provide safe walking conditions Response: Please see the enclosed Neighborhood Map that shows existing roadway and pedestrian conditions as well as school walking conditions. To provide walking conditions for school -age children, the development will need to provide (unless provided by others prior to development) a separated walkway from the site to Benson Hill Elementary School and the existing school bus stop for Lindberg High School at 120th Avenue S.E. and S.E. 184th Street. The separated walkway will either consist of an asphalt walkway, a concrete sidewalk, or a full width delineated shoulder as required by KCRS 3.09. It is expected that approximately 1320 lineal feet of walkway will need to be provided on 120th Avenue S.E. and approximately 2075 lineal feet on S.E. 188th Street. Chad Tibbits King County Department of Development and Environmental Services -5- January 16, 2006 Recreation Space: Demonstrate how the proposed location of the recreation tract is consistent with the requirements of KCC 21A.14.180-200 (i.e. centrally located, road frontage, etc.). Submit a conceptual recreation plan which indicates the type of improvements (i.e. sport court, play structure, benches, landscaping, etc.) proposed within the recreation tract. See KCC 21A.14.180 E2 for equipment requirements. Response: The recreation tract has been modified to be more accessible and visible. Also please see the enclosed preliminary recreation space plan. Revised Preliminary Plat: Provide 25 copies of a revised preliminary plat, as necessary, as a result of above -referenced requests for additional information. Response: These are enclosed. We believe that the above responses, together with the enclosed revised plans and documents, address all of the comments in your letter dated October 6, 2005. Please review and approve the enclosed at your earliest convenience. If you have questions or need additional information regarding this matter, please contact me at this office. Thank you. Respectfully, Ivana Halvorsen Senior Planner 1H/drn 11418c.017.doc enc: As Noted cc: Chris Austin, Trinity Land Development, L.L.C. (w/enc) Rob Flitton, Trinity Land Development, L.L.C. (w/enc) Daniel K. Balmelli, Barghausen Consulting Engineers, Inc. Ali Sadr, Barghausen Consulting Engineers, Inc. AFTER RECORDING MAIL TO:20029 Ilnkmgreq L.L.C. �10.29`sStNE 2 pp 32,0t! -Puyallup, WA 98372 �NGZCOT}, a: t9 uA E2146567 OSWZ/ 15�7 SALT y36t3;0" 09 PAGE601 OF 001 Fi3ed far Recol et &iequew of -Tile Talon't�roup,,p,Divisfon of First American Title Insurance Conq)any Escrow Number: 5»bi08012 sgtw S,tatutoly1'r`anty Deed 3 Gmntor(s): ]ay:kI- Holmgren and FraficesD. Holrrimgren Grantee(s): Holn*cn X L.0 , A Washington Limi#ec -fiat ility Company t P t* `t 5V Abbreviated Legal: M Tract:5, Northwe;f Garden Tracfs; Div 5, Vol, 47, P. 90 A division of First Additional legal(s) on page;..' American Tills Insurance Assessor's Tax Parcel Number(s)t G199044099-:Qorttpany THE GRANTOR lay ii.: fiohirgrcp artd Frances D. Holmgr* lusband and wife for and in consideration of TEN DOLLARS AND ,OTHER GOOD ANIS:VALUAB.Li'CONSIDERATTON in hand paid, conveys and warrants to Hohngren, I I C., A Washitrgton`LinWod Lial?ilify.Company the following described real estate, situated in the County of (Icing), �tale.of Washington: " :: 1 hat.por"on of Tract 5, Northwestern Garden Tnc�ts;. Division No 5, according to the plat tE o eof recorded in Vohune 47 of Plats page 90, Records of Icing County; Wnshington;:}escribed as, follows: beginning at the Noz st comer of Tract 4 of said Plortfivestr itt Clardart Tracts, ISfvision No. 5; Thence South t degreb;t}8'10",lng the West line of Tract 5a disEance of 12{} feetThenc�Sou 89 degrees:34'39" Fast 150 feet; ce North I degree 0814" East 10 lest; 1'ltence-Noath 89;2iegFees 34'39" West I50 feet to tlrg true poirit of beginning. Situate in the County of King, State of Washington. GRANTOR ACICNOWI E4GHS THAT TITLE TO THE PROPERTY IS MARKETABLE'i1T41E T WE OF THIS CONVEYANM T135 FQLLOWINCSHALL NOT CAUSE THE TTI'LE TO BE UNMARKETA$LF-, RIGHTS, R�SERVAliONS, COVENANTS, CONDITIONS, AND RESTRICTIONS, PRESENTLY OF RECORD AND GENERAL TQ"INi; AREA; EAtSEMENTS AND ENCROACHMENTS, NOT MATERIALLY AFFECTING T14P VALUE OF OR UNDULY 11517ERFERING #IT11 GRANTEE15,REASONABLE USE OF THE PROPERTY; AND RESERVED OIL ANDi6k-ml lk RfGHTS. Doc n te:8/9i2005 liyy: /1 Say 01 a Frances D: Holrngren STATE OF WASHINGTON County of King SS: I certify that I know or have satisfactory evidence thaf #ity H Holmgri:n and Fran D. H lmgren is th person(s) who appeared before and said persott(s)'#cknbwledged that. ie/shi t'g signed this instru and u acknowledged it to be Us/bell et cc and voluntary act for the uses and'purposes menrionediii tie ' nt. Dated []ris _ day of t -2001` /} Cp�LFOfv`�ti I Notary Publi6 iin'a�nd for the State of WASHINGtiM , ��,.•S�ON tlt Residing ateoij My appointment01 /. o YFtr\�� INPP _� I p'r_ STWeb Page 1 of 1 Search by: FASTW eb #. WrASMeb 0 05h 194iw, Property Profile New Search Open New Order Customer Service Request order Recorded Docs j P g I P� p� Demographics Comparable Safes Neighbors Tax Ma Street Ma Area Services Demo ra hits School Information Property Services Lender Services Mortgage Leads TRV Reports Other Services News & Resources User/Office Search Customer Service FASTWeb Admin User Settings Authorized User List 12205 SE 188th St Renton WA 98058 Combined Report Printable Version Property Information Owner(s) Holmgren Lie / Parcel # 619900-0099 Property 12205 SE 188th St Map Coord 686-E2; 05-23-33-SW Renton, WA 98058 Census Tract 0293.04 Mailing Addr 310 29th St NE County King Puyallup, WA 98372 Owner Phone 425-254-9976 5 NORTHWESTERN GARDEN TRS DIV # 5 BEG NE COR TR 4 TH S 1-08-10 N 120 FT TH S 89- Legal 34-39 E 150 FT TH N 1-08-10 E 150 FT TH N 89-34-39 W 103.38 FT TO AN ANGLE PT TH S 0-25- 21 W 30 FT TH N 89-34-39 W 46.89 FT TO TPOB Lot Number 5 Characteristics Use Sir Year Built 1951 Sq. Feet 2100 Zoning R6SO Lot Size .4842 # of units Bedrooms 5 Bathrooms 2 Fireplace 1 #Rooms Quality Average Heating PooUSpa N Air Y Style Stories i Improvements Parking Flood X Attributes Other Property Sale Information Sale Date 08/09/2005 $/Sq. Ft. $166.67 2nd Mtg. 100000 Sale Price $350,000.00 1 st Loan $255,207.00 Prior Sale Amt. $189,950.00 Doc No. 200508122918 Loan Type Conventional Prior Sale Dt. 02/13/2002 Doc Type Warranty Deed Xfer Date 08112/2005 Prior Doc No. 200202191344 Seller Holmgren ,lay H ! Lender Fife Com' I Bk Prior Doc Type Warranty Frances D Deed Tax Information imp Value $128,000.00 Exemption Land Value $84,000.00 Tax YearlArea 2005/4250 Total Value $212,000.00 Tax Value $212,000.00 Tax Amount $2,807.20 Improved 60% Information compiled from various sources and is deemed reliable but not guaranteed. Privacy information I Copyright 02005 - The First American Corporation ittps:llfwprodweb 1.firstam.comlFastweblFASTOrderlpropertylookup.ASP?PageName=PropertyProfi le... 10/21/2005 King County Department of Development and Environmental Services 900 Oakesdale Avenue Southwest Renton, WA 98055-1219 October 6, 2005 Clark McGowan Trinity Land Development LLC 310 29=h St NE Puyallup, WA 98372 RE: Notice of Request for Additional Information or Studies Application No. L04P0027 — Wehrman Dear Mr. McGowan: 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 for 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 Ladd :alse Se, Ykes Division Attn: Kim Claussen, Project Manager III, Current Planning Section 900 Oakesdale Avenue Southwest Renton, WA 98055-1219 If the submittal is hand delivered, submit at the address above. Your application is on "hold" form 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. The deadline for the submittal of the necessary information is January 3, 2006. 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 Chad Tibbits at (206) 296-7194. Since ely, Ki ussen, Project Manager III Cu nt Planning Section Cc: Barghausen Consulting Engineers, Attn: Ivana Halverson w/enc Chad Tibbits, Planner, Current Planning Section, LUSD w/enc Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD wlenc Kris Langley, Senior Engineer, Traffic & Engineering Section, KCDOT w/enc Application File w/enc Plat Screening Transmittal King county Preliminary Plat Application of Wehrman DeparcnientofDetieioprment LUSD File No. L04P0027 and Envirunmenmi $erviees Land Use servicn Dkisicn Date of Information Request: October 6, 2005 900 Oakesdale Awnue Southwesi Deadline for Submittal of Information: January 3, 2006 Renton, Washington 98055-1219 Please provide ten (10) copies of the following, unless otherwise noted. Drainage: The following information must be prepared and stamped by a civil engineer licensed in the State of Washington. • Please revise the level 1 off -site analysis to reflect the current proposal. The narratives and maps appear include parcels not included in the proposal boundaries. • Please address off -site upland flow to the site from the west. The level 1 analysis and subbasin maps should show the upstream flow. Note, we found flows from the west in the ditch on SE 1881h St., sheet flow from the west and concentrated flow from the southwest corner. Revise the conceptual drainage plan as needed to address the upstream flow. • Please show the 100-year floodplain for any streams and/or wetlands that affect the site. • Include site cross sections referenced on the preliminary site grading plan. Revise the conceptual drainage plan to address frontage and off -site road improvements Provide preliminary calculations to show the proposed sizing of all the detention facilities. Geotechnical: Provide a geotechnical report prepared by a qualified geotechnical engineer and/or engineering geologist who is licensed in the State of Washington. • The geotechnical report must include an evaluation of possible future landslides on this site. • Prepare at least one cross-section located at or between Sections A & B on the site plan received by DUES on December 14, 2004, that shows the subsurface atratgraphy to a depth of at least 50 feet below the ground surface. The section should also show groundwater conditions, and the type, continuity and approximate strength of the soils. It is expected that at least two exploratory borings drilled to a depth of 50 feet will be needed. • Prepare a detailed slope stability analysis, if determined to be necessary, after completing the initial site studies. Roads/Traffic: • Provide a TIA with a calculation of the AM and PM peak period levels -of -service for the 188th/120th intersection, with and without the connection to the plat of Fleuve des Voiles (L04P0002), and evaluation of turn lanes at the SE 192nd Street/120'h Avenue SE intersection (PM peak hour only). Provide field verification of entering and stopping sight distance(s) at the intersection of SE 188`h/ 120" Avenue SE, and proposed stopping sight distance at the intersection of SE 1881h and 123" (north -south plat street) per 1993 KCRS. wehrman — L04P0027 10/05 • Please provide the easement or right-of-way documents which demonstrate the legal authority to construct the off -site road improvements to the west. Letters of intent from affected property owner(s) is required if existing documentation does not exist • Include cross section details plan and profile (vertical alignment) of the off -site and frontage road improvement. Details of the proposed road fill and preliminary geotechnical recommendations is required. A property owner letter of intent for construction of the road fill is required • Provide an offsite road inventory and right-of-way evaluation to verify appropriate access to the site. Walkways: Provide an inventory map (i.e. existing conditions - widths, surface type, etc.) of the walking routes to the elementary, junior high/middle and high school and/or the appropriate bus stop location associated with each school. The school sites for the proposed subdivision are Benson Hill Elementary, Nelsen Middle School and Lindberg High. Identify any improvements necessary to provide safe walking conditions Recreation Space: Demonstrate how the proposed location of the recreation tract is consistent with the requirements of KCC 21A.14.180-200 (i.e. centrally located, road frontage, etc.). Submit a conceptual recreation plan which indicates the type of improvements (i.e. sport court, play structure, benches, landscaping, etc.) proposed within the recreation tract. See KCC 21A.14.180 E2 for equipment requirements Revised Preliminary Plat: Provide 25 copies of a revised preliminary plat, as necessary, as a result of above - referenced requests for additional information. 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 andfor loss of lots. Wehrman -- L04P0027 10105 0 f 0 z 0 n m z 0,0 0 0 0 o 0 0 z z 124TH AVE S 0 im Vpl4AuS, -12NU 4VEKIF SU Tft 25 �lk b222 (4YS)251—a7B] F� TRINITY LAND DEVELOPMENT W - 29TH STREET NE PUYALLUP, WA 98373 PRELUMARY PLAT FOR WEIII?MN PROPERTY .3 CONTACT- CHFUS AUSTN I i liro"ro�J ,ii � .ems I�•uuw�'a� ssum�.�"'��u,s ws w,.,e.�}{4�� ,9215 ]1W� AYFKIIF $CLIP o.e.a kOn x.. , e.. a. I wo. I vn.• n�RWTRY LAND DEVELOPMENTPRELIMINARY GRADING3t0 OT". - 297H STREET NE RMAND STODRAWAGE PLAN CMS eW Ec I. n Pw'.iw PUYALLUPWA 9M73��-'°2 3 —,�— CONTACT: CHRIS AUSTIN WEHRMAN PROPERTY f a ' n Jlf Ai f � a m � Jr I § A A o A A§ 9 I I I I {I ecs r uv_ J i a: cn IlI asgq G-.=. 0 VJ � I i r �M MIS R� KFN , wa eeo32 (925)25i -fi2Z2 nsi {925)25:-E]82 fA1f 10 - e nFHw�x saoT X Faf. TRNITY LAND DEVELOPMENT �TI'I STFIEET NE ,• a i... irow , rw-N TO. PROFILE AND CROW SECTIONS r.„ PurALLUP, wA saa7a 3 3 .y,„ L �..cr.._,; r.� i CONTACT CHM AUSTIN wEFiiMAN PROPERTY 13 r I b g t � x � _ y 1 r D Al CO CO/1 C P 3 p ca �1 W D D ATI/ �^'.-_ � __ - Cam.• I � L f w ��i TnQ ` s q� �9Nr op"AU4 102,5 lows shruu_ sOuH `^g^' ". Fon Titles 1W18 �4 R� ecNr, wA snosz �, TRpK Y LAND DEVELOPMENT PRELIMINARY TRACT 'A' PARK (435;25' 6222 a2s125 .a ez ,�K �° M - 29TH STREET NE LANDSCAPE PLAN w� cxcmtc�+w. wia r„wxiM:. .n PUYALLUP, WA 98373 L1 1_ "` "" CONTACT Ct#11S AU8TW WEHRMAN PROPERTY GEOTECHNICAL ENGINEERING STUDY WEHRMAN PROPERTY SOUTHEAST 188TH STREET NEAR 120TH AVENUE SOUTHEAST KING COUNTY, WASHINGTON December 22, 2005 Project No. E-11278 Mr. Chris Austin Trinity Land Development, LLC 310 29th Street Northeast Puyallup, Washington 98372 Earth Consultants, Inc. A Bureau Veritas Company 1805 136th Place N.E. Suite 201 Bellevue, WA 98005 (425) 643-3780 Toll Free (888) 739-6670 Il 1 1 [1 1 December 22, 2005 Mr. Chris Austin Trinity Land Development, LLC 310 29th Street Northeast Puyallup, Washington 98372 Project No. E-11278 Dear Mr. Austin: Earth Consultants, Inc. Geotechnical Services Department We are pleased to submit our report titled "Geotechnical Engineering Study, Wehrman Property, Southeast 188th Street near 120th Avenue Southeast, King County, Washington". This report presents the results of our field exploration, selective laboratory tests, and engin- eering analyses. The purpose and scope of our study were outlined in our proposal PR- 11278, dated October 13, 2005. The purpose of this study was to explore the subsurface conditions at the site, and based on the conditions encountered, to provide recommendations for developing the site with a residential development. We appreciate this opportunity to have been of service to you. If you have any questions, or if we can be of further assistance, please call. Respectfully submitted, EARTH CONSULTANTS, INC. Eric L. Woods Staff Geologist ELW/SDDAap Earth Consultants, Inc. A Sureirn Verrtas C'ompauy 1805 1 36Lh Place, N.l., Suite 201 6ellcwc. \X'.,A 98005 Doi Scott D:-Dih-Reitman, Principal Main: (=425) 643-3-80 Fax: (425)746-0860 n Ll TABLE OF CONTENTS E-11278 PAGE INTRODUCTION....................................................................................... 1 General................................................................................................................................ 1 ProjectDescription.......................................................................................I.................... 1 Scopeof Services.............................................................................................................. 2 SITECONDITIONS................................................................................................................... 2 Surface................................................................................................................................ 2 Visual Slope Reconnaissance.......................................................................................... 3 Subsurface......................................................................................................................... 3 Groundwater..... : .......................... — ........ 5 LaboratoryTesting............................................................................................................ 5 CRITICAL AREA CONSIDERATIONS.................................................................................... 6 Erosion Hazard Areas ......................................... 6 SteepSlope Hazard Areas., .............................................................................................. 6 ConstructionSetbacks................................................................................................... 7 I u DISCUSSION AND RECOMMENDATIONS............................................................................ 7 General................................................................................................................. 7 Site Preparation and General Earthwork........................................................................ 7 Erosion Control and Stripping......................................................................................... 8 TemporarySlopes.......................................................................................................... 8 StructuralFill ................................................................................................................... 9 Slope Fill Placement................................................................. 9 PermanentSlopes ..........................................................................................................10 Foundations.......................................................................................................................10 Slab -on -Grade Floors........................................................................................................11 RetainingWalls..................................................................................................................11 Seismic Design Considerations.......................................................................................12 GroundRupture ..............................................................................................................12 Liquefaction....................................................................................................................12 Ground Motion Response..............................................................................................13 Site Drainage ....................................... ....13 LIMITATIONS............................................................................................................................14 AdditionalServices............................................................................................................14 1 t 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ILLUSTRATIONS Plate 1 Plate 2 Plate 3 Plate 4 Plate 5 Plate 6 APPENDICES Appendix A Plate Al Plates A2 through A13 Appendix B Plate B1 TABLE OF CONTENTS, Continued E-11278 Vicinity Map Test Pit Location Plan Cross Section A -A' Cross Section B-B' Typical Slope Fill Placement Typical Footing Subdrain Detail Field Exploration Legend Test Pit Logs Laboratory Test Results Grain Size Analyses I General I GEOTECHNICAL ENGINEERING STUDY WEHRMAN PROPERTY SOUTHEAST 188TH STREET NEAR 120TH AVENUE SOUTHEAST KING COUNTY, WASHINGTON E-11278 INTRODUCTION This report presents the results of the geotechnical engineering study completed by Earth Consultants, Inc. (ECI) for the proposed Wehrman Property residential development located at Southeast 188th Street near 120th Avenue Southeast in King County, Washington. The general location of the site is shown on the "Vicinity Map," Plate 1. Project Description The subject site consists of an approximately 7.25-acre, irregularly shaped residential property located in the 12200 block of Southeast 188th Street, just east of the City of Renton. The undeveloped site is bordered to the west by existing single-family residence lots, to the east by ' a transmission line easement, and to the north and south by undeveloped property. We understand it is planned to develop the site with a new residential development. Based on our review of a preliminary site plan provided by the project civil engineer, the proposed development will include up to 30 single-family residence lots, a new, north--south-trending access road that will connect with Southeast 188th Street from the northwestern corner of the site, and a stormwater control pond. Review of the preliminary grading plans indicates up to 20 feet of fill will be placed to reach the ' proposed lot elevations in the eastern portion of the improvement area. Cuts in the western portion of the proposed improvement area will extend up to approximately 24 feet below existing grade. We und erstand stormwater runoff will be directed to a new detention pond that will be constructed in the southeastern portion of the proposed improvement area. Outfall from the pond will flow into a wetland buffer area in the eastern portion of the site. At the time our study was performed, the property, proposed lots, stormwater detention pond and our exploratory locations were approximately as shown on the "Test Pit Location Plan," Plate 2. Earth Consultants, Inc. Page 1 A Bureau Veritas Company GEOTECHNICAL ENGINEERING STUDY E_1 1278 Prepared for Trinity Land Development, LLC December 22, 2005 The conclusions and recommendations in this study are based on our understanding of the proposed development, which is in turn based on the project information provided us. If the above project description is incorrect, or the project information changes, we should be consulted to review the recommendations contained in this study and make modifications, if needed. Scope of Services ' We prepared this study in general accordance with the scope of services outlined in our October 13, 2005, proposal. On this basis, our study addresses the following: a Surface and subsurface soil and water conditions • Site preparation, grading, and earthwork procedures (including stripping depth recommendations), details of structural fill placement, and compaction Suitability of existing on -site materials for use as structural fill, and recommendations for imported fill materials • Seismic hazard analyses, including evaluation of potential liquefaction hazard Short-term and long-term groundwater management and erosion control measures • Foundation design criteria * Estimates of anticipated settlement magnitudes • Temporary and permanent slope recommendations • Slope stability assessment SITE CONDITIONS Surface The subject site consists of an undeveloped property located at the east end of Southeast 188th Street, east of 120th Avenue Southeast in unincorporated King County, Washington, as shown on Plate 1. The approximately 7.25-acre, irregularly shaped site is bounded to the north and south by undeveloped property, to the east by a transmission line easement, and to the west by existing single-family residences. The site topography is comprised of an east -facing slope that descends approximately 80 to ' 95 feet in elevation from the western to eastern property line over a horizontal distance of approximately 500 feet. Slope gradients generally become more gradual to the east. i fl Earth Consultants, Inc. Page 2 A Bureau Veritas Company I GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 In the western half of the property, slopes descend east at gradients generally in the range of 20 to 35 percent, with localized areas in the range of 40 to 50 percent. The slopes in the western portion of the site are bisected by several east -west trending drainages. The localized, steep sections of slope are generally located adjacent to the drainages. Several steep slopes in the northern portion of the site appear to be over -steepened by a roadway cut that extends approximately 300 feet south from the northern property line along the approximate proposed roadway alignment. In the eastern half of the property, slopes descend east to a wetland area along the eastern site perimeter at gradients in the range of 10 to 15 percent. The site is vegetated primarily with small to medium diameter fir and big leaf maple trees with a thick, mixed brush undergrowth and localized patches of blackberry brambles. Visual Slope Reconnaissance As part of our study, we conducted a visual reconnaissance of the slopes located in the western and central portions of the site. Our reconnaissance consisted of traversing the slopes to observe potential indications of erosion, recent or past instability, and potential future instability. During our reconnaissance of the slopes, we did not observe existing erosion scars, or indications of previous debris flows, slump block failures, or indications of deep-seated or global instability. However, based on the observed conditions and on our experience with similar sites in the project vicinity, the ascending slope is likely mantled by 2 to 3 feet of loose, surficial native soil that could be susceptible to erosion or shallow debris flows if surface vegetation is not maintained and surface water is not controlled. Debris flow failures can be relatively common on the steep scopes comprising the perimeters of the glacial drift uplands in the Puget Sound Basin. Debris flows occur when loose, weathered soils become saturated during periods of heavy precipitation or by concentrated surface water flowing over the top of slope. These failures typically involve the upper 2 to 3 feet of the slope face and comprise several tens of cubic yards of soil and vegetation. The result of these shallow failures is the slow inland propagation of the top of slope and the deposition of a fan of colluvium at the toe of the slope. ISubsurface fl Subsurface conditions at the site were evaluated by excavating 13 test pits at the approximate locations shown on the Plate 2. Information from the test pits, and from existing and proposed topography depicted on a preliminary site plan, was used to prepare Cross Sections A -A' and B-B' along the alignments shown on Plate 2. The cross sections are included as Plate 3 and Plate 4. Earth Consultants, Inc. Page 3 A Bureau Verttas Company GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 The test pits were excavated to a maximum depth of 17.5 feet below existing grade. Our test pit logs are included as Plates A2 through A14. Please refer to the test pit logs for a detailed description of the subsurface conditions encountered at each test pit location. A description of the field exploration methods is included in Appendix A. The following is a generalized description of the subsurface conditions encountered. At each of our test pit locations, a surficial layer of topsoil and forest duff was encountered. The topsoil was typically 6 to 12 inches thick, with localized areas that were up to 14 inches thick. The topsoil was characterized by its dark -brown to black color and organic content. Underlying the topsoil at each of our test pit locations, a loose surficial soil layer comprised of silty sand with varying amounts of gravel (Unified Soil Classification SM) was encountered. The surficial soils extended to depths of 2 to 3.5 feet below existing grade. Underlying the surficial soils at Test Pits TP-6 through TP-9, TP-12, and TP-13, recessional outwash deposits comprised of silty sand with gravel (SM) and poorly graded sand with silt and gravel (SP-SM) were encountered. The recessional deposits were generally medium dense, becoming dense at depths of 5 to 7.5 feet below existing grade. The recessional deposits extended to the maximum depth explored at Test Pits TP-6 through TP-9. Underlying the surficial soils at Test Pits TP-1 through TP-4, TP-10, and TP-11, glacial till comprised of silty sand with gravel (SM) was encountered. The glacial till was generally medium dense to dense and weathered when encountered, becoming very dense and less weathered at depths of 4 to 6 feet below existing grade. The glacial till extended to the maximum exploration depth at Test Pits TP-1 and TP-10. Underlying the surficial soils at Test Pit TP-5, underlying the recessional soils at a depth of approximately 8 feet below existing grade in Test Pits TP-12 and TP-13, and underlying the glacial till at depths of 7 to 13 feet below existing grade in Test Pits TP-2 through TP4 and TP- 11, advance outwash deposits comprised of silty sand with varying amounts of gravel (SM), poorly graded sand with silt and gravel (SP-SM), poorly graded sand with gravel (SP), poorly ' graded gravel with silt and sand (GP -GM), sandy silt (MIL), and silt (ML) were encountered. The advance outwash deposits were generally dense and contained localized sand and silt interbeds. The advance outwash deposits extended to the maximum depth explored where encountered. Review of the Geologic Map of King County, Washington (Booth, Haugerud, and Sacket, 2002) indicates the slopes occupying the western portion of the site are immediately underlain by glacial till (Map unit Qvt) deposited by the Vashon glacier, while the valley in the eastern portion of the site is underlain by recessional outwash (Map unit Qvr) deposited by meltwater from the receding Vashon glacier. Our fieldwork generally correlates with the geologic map designations. Earth Consultants, Inc. Page 4 A Bureau Veritas Company I I I I I GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 Review of the 1973 USDA Soil Conservation Service (SCS) maps for King County indicates the western portion of the site is underlain by Alderwood gravelly sandy loam, 16 to 30 percent slopes (Map Unit AgD). The surface runoff in this soil is described as medium, with a severe erosion hazard, and a moderate slippage potential. Our review indicates the eastern portion of the site is underlain by Alderwood gravelly sandy loam, 0 to 6 percent slopes (Map Unit AgB). The surface runoff potential of this soil is described as slow, and there is a slight erosion hazard. Groundwater Groundwater was not encountered during our subsurface exploration. However, iron oxide staining, and wet zones were encountered at all of our test pit locations at varying depths. The iron oxide staining and increased soil moisture appear to be indicative of seasonal, perched groundwater. Based on the depth of anticipated cuts and on observed site conditions, groundwater seepage may be encountered in site excavations. The contractor should be aware that groundwater levels are not static. There will likely be fluctuations in the groundwater level and seepage rate, depending on the season, amount of rainfall, surface water runoff, and other factors. Generally, the water level is higher and seepage rates are greater in the wetter, winter months (typically October through May). Laboratory Testing Laboratory tests were conducted on representative soil samples to verify or modify the field soil classifications and to evaluate the general physical properties and engineering characteristics of the soil encountered. Visual field classifications were supplemented by grain -size analyses on representative soil samples. Moisture content tests were performed on all samples. The results of laboratory tests performed on specific samples are provided either at the appropriate sample depth on the individual test pit logs or on a separate data sheet contained in Appendix B. ' It is important to note that these test results may not accurately represent the overall in -situ soil conditions. Our geotechnical engineering recommendations are based on our interpretation of these test results. ECI cannot be responsible for the interpretation of these data by others. Earth Consultants, Inc. Page 5 A Bureau Veritas Company 11 GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 CRITICAL AREA CONSIDERATIONS As part of our study, the potential geologic hazards within the subject site as defined in King County Code, Chapter 21A.06 (Technical Terms and Land Use Definitions), were addressed. Based on our subsurface exploration and slope reconnaissance, the site meets the criteria of an erosion hazard area and a steep slope hazard area as defined in the King County Code. Erosion Hazard Areas Review of the 1973 USDA Soil Conservation Service (SCS) maps for King County indicates the soils underlying the western portion of the property consist of Alderwood gravelly sandy loam, at 15 to 30 percent slopes. Alderwood soils with a 15 to 30 percent slope classify as a severe erosion hazard, and meet the criteria of an Erosion Hazard Area in King County Code, Chapter 21A.06.415. Erosion in the proposed development area will need to be controlled using best management practices. Our test pits indicate the soils that should be encountered during construction will primarily consist of fine-grained silty sand. This soil is susceptible to erosion due to sheet flow. The erosion control plan should include measures for reducing concentrated surface p g su ace runoff and protecting disturbed or exposed surfaces by mulching and revegetation. The temporary erosion and sedimentation control plan should include the following: • Where practical, maintain vegetation buffers around cleared areas • Cover exposed soil stockpiles • Hydroseed or place straw mulch in areas where grading is completed • Divert water away from the top of slopes • Use silt fences and straw bales around the lower portions of the site perimeter • Coordinate clearing, excavation and erosion control to reduce exposed areas The erosion control measures should be reviewed on a regular basis to verify they are functioning as intended. Steep Slope Hazard Areas In the western half of the property, slopes descend east at gradients generally in the range of 20 to 35 percent. However, the slopes are bisected by a series of east -west trending drainages that contain localized areas with slope gradients in the range of 40 to 50 percent. Slopes containing gradients of 40 percent or greater meet the criteria of a "Steep Slope Hazard Area" in King County Code, Chapter 21A.06.12305. The localized steep slopes range in height from 10 to 18 feet. Earth Consultants, Inc. Page 6 A Bureau Veritas Company 11 GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 Review of preliminary grading plans indicates cuts of up to 24 feet are planned in the western portion of the site, which will include grading of the localized steep slopes. However, preliminary plans indicate a 2H:1 V (Horizontal:Vertical) cut slope is planned along the western edge of the development area and a 21­1:1 V fill slope is planned along the eastern edge of the development area. The proposed slopes are to range from 10 to 24 feet in height and will meet the criteria of a Steep Slope Hazard Area. As such, construction setbacks will need to be established from the top and toe of these slopes. Construction Setbacks Based on the results of our study, and provided the recommendations contained in this study are followed, a minimum total construction setback of 25 feet from the toe of the 40 percent and steeper slope to the east and west of the planned development area should be adequate. The recommended total setback consists of a 10-foot buffer and a 15-foot building setback. I General I I DISCUSSION AND RECOMMENDATIONS Based on the results of our study, in our opinion, development of the site with a single-family residence development is feasible from a geotechnical standpoint. Conventional spread and continuous footing foundation systems bearing on competent native soil or newly placed structural fill may be used for support of the residences. Slab -on -grade floors may be similarly supported. If loose native soil is encountered at construction foundation and slab subgrade elevations, it should be overexcavated and replaced with structural fill. This report has been prepared for specific application to this project only and in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area. This report is for the exclusive use of Trinity Land Development, LLC and their representatives. No warranty, expressed or implied, is made. This report, in its entirety, should be included in the project contract documents for the information of the contractor. Site Preparation and General Earthwork ' Based on our understanding of the proposed development plan, site earthwork will likely consist of installing erosion control measures; stripping the site; cutting and filling the site to provide building pad and street grades and installing underground utilities; preparing curb, gutter, sidewalk, and roadway subgrades; excavating the detention pond; and constructing single-family residences on the lots. Earth Consultants, Inc. Page 7 A .bureau Ventas Company Fi GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 Erosion Control and Stripping Prior to removal of the vegetation, the clearing limits should be flagged. Silt fence should be installed downslope of proposed grading areas. We recommend that, once the site clearing limits are flagged, ECI be contacted to walk the site with the grading contractor in order to provide additional geotechnical and erosion control recommendations. After the site is logged and grubbed, the proposed grading areas of the site should be stripped and cleared of surface vegetation, organic matter, and other deleterious material. Existing utility pipes to be abandoned should be plugged or removed so they do not provide a conduit for water and cause soil saturation and stability problems. The sod and topsoil encountered in our test pits was generally on the order of 6 to 14 inches thick. The sod and topsoil should be stripped and removed from the site, or may be stockpiled on site to be used in landscaping areas. The stripped materials should not be mixed with materials to be used as structural fill. ' During construction, the site must be graded such that surface water is collected and tightlined to an appropriate drainage facility. Water must not be allowed to stand in fill areas or where buildings, slabs, or pavements are to be constructed. Loose surfaces should be 1 sealed by compacting the surface to reduce the potential for moisture infiltration into the soils. 1 �1 Temporary Slopes The following information is provided solely as a service to our client. Under no circumstances should this information be interpreted to mean that ECI is assuming responsibility for construction site safety or the contractor's activities; such responsibility is not being implied and should not be inferred. In no case should excavation slopes be greater than the limits specified in local, state (WISHA), and federal (OSHA) safety regulations. Based on the information obtained from our field exploration and laboratory testing, the loose surficial soils and medium dense recessional outwash soils and weathered glacial till encountered in our test pit excavations would be classified as Type C by OSHAIWISHA. Temporary cuts greater than 4 feet in height in Type C soils may be sloped to a maximum inclination of 1.5H:1V. If slopes of this inclination or flatter cannot be constructed, temporary shoring may be necessary. The underlying dense to very dense glacial till soils and dense advance outwash soils encountered in our test pit locations would be classified as Type A by OSHANVISHA. Temporary cuts greater than 4 feet in height in Type A soils may be sloped to a maximum inclination of 0.75H:1V. Where groundwater seepage is encountered, the saturated soils should be treated as a Type C soil and should be cut no steeper than 1.5H:1V. Earth Consultants, Inc. Page 8 A Bureau Ventas Company I GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 If slopes of this inclination or flatter cannot be constructed, temporary shoring may be necessary. If temporary shoring is required, we will be available to provide shoring design criteria. Structural Fill Structural fill is defined as compacted fill placed under buildings, roadways, floor slabs, pavements, or other load -bearing areas. Structural fill should be placed in horizontal lifts not exceeding 12 inches in loose thickness and compacted to a minimum of 95 percent of its laboratory maximum dry density determined in accordance with ASTM Test Designation D- 1557 (Modified Proctor). The fill materials should be placed at or near their optimum moisture content. Based on the results of our laboratory tests, the on -site soils at the time of our exploration appear to be near their optimum moisture content and should be suitable for use as structural fill. Laboratory testing indicates the native site soils have from 4 to 34 percent fines passing the No. 200 sieve. Soil with fines in excess of 5 percent will degrade if exposed to excessive moisture, and compaction and grading will be difficult if the soil moisture increases above its optimum condition. If the site soils are exposed to excessive moisture or cannot be adequately compacted, it may be necessary to import a soil that can be compacted. During dry weather, any non -organic I compactable soil with a maximum grain size of 4 inches can be used. Fill for use during wet weather should consist of a fairly well -graded, granular material having a maximum grain size of 4 inches and no more than 5 percent fines passing the No. 200 sieve based on the minus 314-inch fraction. Slope Fill Placement In our opinion, the placement of fill on a sloping grade is acceptable; however, where slope gradients exceed 25 percent, the fill must be keyed and benched into the slope. This process consists of excavating a keyway at the toe of the planned fill. The keyway should have a width of about 6 to 8 feet and a depth of at least 2 feet into competent native soil. The slope above the keyway should then be cut into a series of horizontal to slightly inward sloping benches. Typically, the benches are excavated with a small bulldozer as the fill is brought up. The width of the benches will vary with the gradient of the slope, usually the gentler the slope, the wider the benches. "Slope Fill Placement," Plate 5, shows a schematic diagram of the keyway and benches. >� Earth Consultants, Inc. Page 9 A Bureau Veriras Company I Il 1j GEOTECHNICAL- ENGINEERING STUDY Prepared for Trinity Land Development, LLC Permanent Slopes E-11278 December 22, 2005 Permanent cut and fill slopes should be inclined no steeper than 2H:1 V. Cut slopes should be observed by ECI during excavation to verify that conditions are as anticipated. Fill slope construction should also be observed under the full time observation of an ECI representative to test structural fill soils. Supplementary recommendations can be developed, if needed, to improve stability; including flattening of slopes, placing erosion control fabrics, or installing of surface or subsurface drains. Permanently exposed slopes should be hydroseeded with an appropriate species of vegetation to reduce erosion and improve stability for the surficial layer of soil immediately after construction. In the summer months, it may be necessary to water the slopes to maintain the hydroseed germination. Foundations Based on the results of our study and provided our recommendations are followed, in our opinion, the proposed residences may be supported on conventional spread and continuous footing foundation systems bearing on competent native soil or granular structural fill. If loose native soil is encountered at footing subgrade elevations, it should either be overexcavated and replaced with structural fill, or the footings should be extended to the underlying competent soil. Exterior foundation elements should be placed at a minimum depth of 18 inches below final exterior grade. Interior spread foundations should be placed at a minimum depth of 12 inches below the top of slab, except in unheated areas where interior foundation elements should be founded at a minimum depth of 18 inches. Interior foundations in crawl space areas may be supported on competent soils exposed on the surface of the crawl space. With foundation support obtained as described, for design, an allowable soil bearing capacity of 2500 pounds per square foot (psf) should be used for the competent native soil or structural fill. Loading of this magnitude would be provided with a theoretical factor -of - safety in excess of 3.0 against shear failure. For short-term dynamic loading conditions, a 1/3 increase in the above allowable bearing capacity may be used. Continuous and individual spread footings should have minimum widths in accordance with local building codes. With structural loading as expected and provided the above design criteria are followed, total settlement in the range of 1 inch is anticipated, with differential settlement of approximately 1/2 inch. Most of the anticipated settlements should occur during construction as dead loads are applied. Earth Consultants, Inc. Page 10 A Bureau Veritas Company 1 k GEOTECHNICAL ENGINEERING STUDY E_11278 Prepared for Trinity Land Development, Lt_C December 22, 2005 Horizontal loads can be resisted by friction between the base of the foundation and the supporting soil and by passive soil pressure acting on the face of the buried portion of the foundation. For the latter, the foundation must be poured "neat" against the competent native soils or backfiiled with structural fill. For frictional capacity, a coefficient of 0.30 should be used. For passive earth pressure, the available resistance should be computed using an equivalent fluid pressure of 250 pounds per cubic foot (pcf). These lateral resistance values are allowable values, and a factor -of -safety of 1.5 has been included. As movement of the foundation element is required to mobilize full passive resistance, the passive resistance should be neglected if such movement is not acceptable. Footing excavations should be observed by a representative of ECI prior to placing forms or rebar to verify that conditions are as anticipated in this report. Slab -on -Grade Floors Slab -on -grade floors should be supported on competent native soil or granular structural fill. Disturbed subgrade soil must either be recompacted or replaced with structural fill. Slabs placed on structural fill or on native soils should be provided with capillary break consisting of a minimum of 4 inches of free -draining sand or gravel. In areas where slab moisture is undesirable, a vapor barrier, such as a 5-mil plastic membrane, should be placed beneath the slab. Retaining Walls Review of the preliminary plans indicates retaining walls are planned along the western edge of the proposed pond and along the western and southern edge of the development area. Retaining walls should be designed to resist lateral earth pressures from the retained soils and from appropriate surcharge loading. For unrestrained walls, lateral earth pressures should be calculated using an equivalent fluid with a unit weight of 35 pcf. For non -yielding walls, the equivalent fluid pressure should be increased to 50 pcf. The above lateral earth pressure values assume free -draining, horizontal, backfili conditions. The above lateral earth pressures assume no surcharges due to traffic, adjacent foundation, construction loads, or other loads acting on the walls. If surcharges are to apply, they should be added to the above design lateral pressures. A 2-foot soil surcharge should be used to account for traffic surcharges, where applicable. Earth Consultants, Inc. Page 11 A Bureau Veritas Company GEOTECHNICAL ENGINEERING STUDY E-11278 Prepared for Trinity Land Development, LLC December 22, 2005 To reduce the potential for hydrostatic forces building up behind the walls, the use of free - draining backfill or a geotextile drain combined with a perforated drainpipe should be used. The free -draining backfill should consist of pea gravel or washed rock with a fines content of less than 5 percent, based on the minus 3/4-inch fraction. The free -draining material should extend at least 18 inches behind the wall. A rigid, 4-inch diameter, schedule 40, perforated PVC or SDR 35 drainpipe should be placed at the base of the wall and should be surrounded by a minimum of 1 cubic foot per lineal foot with pea gravel or washed rock. The pipe should be placed with the perforations facing down. The remainder of the backfill should consist of structural fill. Where drainage behind walls cannot be achieved, the walls should be designed for hydrostatic pressures. ISeismic Design Considerations Earthquakes occur in the Puget Lowland with regularity; however, the majority of these ievents are of such low magnitude they are not felt without instruments. Large earthquakes do occur, as indicated by the 1949, 7.2 magnitude earthquake in the Olympia area, the 1965, 6.5 magnitude earthquake in the Midway area, and the 2001, 6.8 magnitude earthquake in the Nisqually area. There are three potential geologic hazards associated with a strong motion seismic event at this site: ground rupture, liquefaction, and ground motion response. Ground Rupture The strongest earthquakes in the Puget Lowland are widespread, subcrustal events, ranging in depth from 30 to 55 miles. Surface faulting from these deep events has not been documented to date. Therefore, it is our opinion that the risk of ground rupture at this site during a strong motion seismic event is negligible. Liquefaction Liquefaction is a phenomenon in which soils lose all shear strength for short periods of time during an earthquake. Groundshaking of sufficient duration results in the loss of grain -to - grain contact and rapid increase in pore water pressure, causing the soil to behave as a 1 fluid. To have a potential for liquefaction, a soil must be cohesionless with a grain -size distribution of a specified range (generally sand and silt); it must be loose; it must be below the groundwater table; and it must be subject to sufficient magnitude and duration of groundshaking. The effects of liquefaction may be large total and/or differential settlement for structures founded in the liquefying soils. In our opinion, the potential for liquefaction of the soils encountered at this site should be low to negligible. This conclusion is based on the absence of a shallow groundwater table and the generally increasing soil density with depth. Earth Consultants, Inc. Page 12 A Bureau lferitas Company 1 71, GEOTECHNICAL ENGINEERING STUDY Prepared for Trinity Land Development, LLC Ground Motion Response E-11278 December 22, 2005 The 2003 lntemational Building Code (IBC) regulations contain a static force procedure and a dynamic force procedure for design -base shear calculations. Based on the encountered soil conditions, it is our opinion Site Class C, "Very Dense Soil and Soft Rock," as defined in Table 1615.1.1 of the IBC, should be used to characterize the site soils. Site Drainage Groundwater was not encountered during our subsurface exploration. However, iron oxide staining, and wet zones were encountered at all of our test pit locations at varying depths. The iron oxide staining and increased soil moisture appear to be indicative of seasonal, perched groundwater. Based on the depth of anticipated cuts and on observed site conditions, groundwater seepage may be encountered in site excavations. If seepage is encountered, the bottom of the excavation should be sloped to one or more shallow sump pits. The collected water can then be pumped from these pits to a positive and permanent discharge, such as a nearby storm drain. Depending on the magnitude of such seepage, it may also be necessary to connect the sump pits by a system of connector trenches. Final site grades must allow for drainage away from the residence foundation. The ground should be sloped at a gradient of 3 percent for a distance of at least 10 feet away from the residences. Footing drains should be installed around the perimeter of the residences at or just below the invert of the footing with a gradient sufficient to initiate flow, as shown on the "Typical Footing Subdrain Detail," Plate B. Under no circumstances should roof downspout drain lines be connected to the footing drain system. Roof downspouts must be separately tightlined to discharge. Cleanouts should be installed at strategic locations to allow for periodic maintenance of the footing drain and downspout tightline systems. Earth Consultants, Inc. Page 13 A Bureau Veritas Company 1 n fl GEOTECHNICAL ENGINEERING STUDY Prepared for Trinity Land Development, LLC LIMITATIONS E-11278 December 22, 2005 Our recommendations and conclusions are based on the site materials observed, selective laboratory testing and engineering analyses, the design information provided us, and our experience and engineering judgment. The conclusions and recommendations are professional opinions derived in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area. No warranty is expressed or implied. The recommendations submitted in this report are based on the data obtained from the test pits. Soil and groundwater conditions between test pits may vary from those encountered. The nature and extent of variations between our exploratory locations may not become evident until construction. If variations do appear, ECI should be requested to reevaluate the recommendations of this report and to modify or verify them in writing prior to proceeding with the construction. Additional Services As the engineering geologist of record, ECI should be retained to perform a general review of the final design and specifications to verify that the earthwork and foundation recommendations have been properly interpreted and implemented in the design and in the construction specifications. ECI should also be retained to provide geotechnical services during construction. This is to observe compliance with the design concepts, specifications, or recommendations and to allow design changes in the event subsurface conditions differ from those anticipated prior to the start of construction. Earth Consultants, Inc. Page 14 A Bureau Veritas Company I I I 11 Reference: King County Map 686 By Thomas Brothers Maps Dated 2005 NORTH ,a_ff Earth Consultants, Inc. A MIR'(W l C01(J_s Company VICINITY MAP WEHRMAN PROPERTY KING COUNTY, WASHINGTON DRWN. DNM PROJ. NO. 11278 CHKD. ELW DATE 12/15/05 PLATE 1 to i 6 m 3n3� ✓ - � is CU °° ti N a V z z O N uj E o d a s co U)w LL O Q o d N Q Z o IL N 2 p w U Q~ to LL tv X z ¢ J Z P Q .-o Z D O 4 w a a Ui Q ¢ CL ¢ Ltd CO z IO oil � 2 ❑ U Lo 2 co N U Z rr C L.L W LU z V Z W T Z a (f) Z O U Z 'W'^ YJ Z) V M¢ L!J U Z Lu Of w w m m m m m in i m m m i= i i m = m i = r m I 1 STANDARD NOTES: Slope should be stripped of topsoil and unsuitable materials prior to excavating key way or benches. Benches will typically be equal to a dozer blade width, approximately 8 feet, but a minimum of 4 feet. Final slope gradient should be 2H:4V or less(Horizontal:Vertical). Final slope face should be densified by over -building with compacted fill and trimming back to shape or by compaction with dozer or roller. Planting or hydroseeding slope face with a rapid -growth, deep-rooted, vegetative mat will reduce erosion potential of slope area. Use of pegged -in -place jute matting or geotechnical fabric will help maintain the seed and mulch in place until the root system has an opportunity to germinate. Structural fill should be placed in thin, loose lifts, not exceeding 12 inches in thickness. Each lift should be compacted to no less than the degree specified in the Site Preparation and General Earthwork Section of this report. No additional lift should be placed until compaction is achieved. FINAL SLOPE GRADIENT (SEE TEXT) 2 IV/ TYPICAL .BENCH" 4 FEET MINIMUM WIDTH EXISTING GRADE LEGEND Organic -free, granular material with a maximum size of 4 inches. Material should be approved by geotechnical engineer. Key way fill is same as described above. Keyway should be minimum 2 feet deep and 8 feet wide, extending the full length of the slope face_ Approximate existing grade SCHEMATIC ONLY - NOT TO SCALE NOT A CONSTRUCTION DRAWING PV YfP 1 Earth Consultants, Inc. axa Al3ueaii 1'rrilus Carnfmrul TYPICAL SLOPE FILL PLACEMENT WEHRMAN PROPERTY KING COUNTY, WASHINGTON DRWN. DNM I PROJ. NO. 11278 CHKD. ELW DATE 12/15/05 PLATE 5 1 t 1 1 1 1 1 1 4 INCH MIN. DIAMETER PERFORATED PIPE- 2 INCH MIN. 4 INCH MAX. 12 INCH MIN. 2 INCH MIN. LEGEND Surface seal; native soil or other SCHEMATIC ONLY - NOT TO SCALE low permeability material NOT A CONSTRUCTION DRAWING Washed rock or pea gravel a Earth Consultants, Inc. Drain pipe; perforated or slotted B,s r3 r«<< vewus c:cimpun, O rigid Schedule 40 PVC or SDR 35 pipe laid with perforations or slots facing down; tight jointed; with a TYPICAL FOOTING SUBDRAIN DETAIL positive gradient. Do not use flexible corrugated plastic pipe. WEHRMAN PROPERTY Do not tie building downspout KING COUNTY, WASHINGTON drains into footing lines. DRWN. DNM PROJ. NO. 11278 GHKD. ELW I DATE 12/15/05 PLATE 6 IMPORTANT INFORMATION 11 fl ABOUT YOUR GEOTECHNiCAL ENGINEERING REPORT More construction problems are caused by site subsur- face conditions than any other factor. As troublesome as subsurface problems can be, their frequency and extent have been lessened considerably in recent years, due in large measure to programs and publications of ASFE/ The Association of Engineering Firms Practicing in the Geosciences. The following suggestions and observations are offered to help you reduce the geotechnical-related delays, cost -overruns and other costly headaches that can occur during a construction project. A GEOTECHNICAL ENGINEERING REPORT IS BASED ON A UNIOUE SET OF PROJECT -SPECIFIC FACTORS A geotechnical engineering report is based on a subsur- face exploration plan designed to incorporate a unique set of project -specific factors. These typically include: the general nature of the structure involved, its size and configuration; the location of the structure on the site and its orientation: physical concomitants such as access roads, parking lots, and underground utilities, and the level of additional risk which the client assumed by virtue of limitations imposed upon the exploratory program. To help avoid costly problems, consult the geotechnical engineer to determine how any factors which change subsequent to the date of the report may affect its recommendations. Unless your consulting geotechnical engineer indicates otherwise, your geotechnical engineering report should not be used: • When the nature of the proposed structure is changed, for example, if an office building will be erected instead of a parking garage, or if a refriger- ated warehouse will be built instead of an unre- frigerated one: • when the size or configuration of the proposed structure is altered; • when the location or orientation of the proposed structure is modified: • when there is a change of ownership, or • for application to an adjacent site. Geotechnical engineers cannot accept responsibility for problems which may develop if they are not consulted after factors consid- ered in their report's development have changed. MOST GEOTECHNICAL "FINDINGS" ARE PROFESSIONAL ESTIMATES Site exploration identifies actual subsurface conditions only at those points where samples are taken, when they are taken. Data derived through sampling and sub- sequent laboratory testing are extrapolated by geo- technical engineers who then render an opinion about overall subsurface conditions, their likely reaction to proposed construction activity, and appropriate founda- tion design. Even under optimal circumstances actual conditions may differ from those inferred to exist, because no geotechnical engineer, no matter how qualified, and no subsurface exploration program, no matter how comprehensive, can reveal what is hidden by earth, rock and time. The actual interface between mate- rials may be far more gradual or abrupt than a report indicates. Actual conditions in areas not sampled may differ from predictions. Nothing can be done to prevent the unanticipated, but steps can be taken to help minimize their impact. For this reason, most experienced owners retain their geotechnical consultants through the construction stage, to iden- tify variances, conduct additional tests which may be needed, and to recommend solutions to problems encountered on site. SUBSURFACE CONDITIONS CAN CHANGE Subsurface conditions may be modified by constantly - changing natural forces. Because a geotechnical engi- neering report is based on conditions which existed at the time of subsurface exploration, construction decisions should not be based on a geotechnical engineering report whose adequacy may have been affected by time. Speak with the geo- technical consultant to learn if additional tests are advisable before construction starts. Construction operations at or adjacent to the site and natural events such as floods, earthquakes or ground- water fluctuations may also affect subsurface conditions and, thus, the continuing adequacy of a geotechnical report. The geotechnical engineer should be kept apprised of any such events, and should be consulted to determine if additional tests are necessary. GEOTECHNICAL SERVICES ARE PERFORMED FOR SPECIFIC PURPOSES AND PERSONS Geotechnical engineers' reports are prepared to meet the specific needy of specific individuals. A report pre- pared for a consulting civil engineer may not be ade- quate for a construction contractor, or even some other consulting civil engineer Unless indicated otherwise, this report was prepared expressly for the client involved and expressly for purposes indicated by the client. Use by any other persons for any purpose, or by the client fora different purpose, may result in problems. No indi- vidual other than the client should apply this report for its intended purpose without first conferring with the geotechnical engineer. No person should apply this report for any purpose other than that originally contemplated without first conferring with the geotechnical engineer A GEOTECHNICAL ENGINEERING REPORT IS SUBJECT TO MISINTERPRETATION Costly problems can occur when other design profes- sionals develop their plans based on misinterpretations of a geotechnical engineering report.1b help avoid these problems, the geotechnical engineer should be retained to work with other appropriate design profes- sionals to explain relevant geotechnical findings and to review the adequacy of their plans and specifications relative to geotechnical issues. BORING LOGS SHOULD NOT BE SEPARATED FROM THE ENGINEERING REPORT Final boring logs are developed by geotechnical engi- neers based upon their interpretation of field logs (assembled by site personnel) and laboratory evaluation of field samples. Only final boring logs customarily are included in geotechnical engineering reports. These togs should not under any circumstances be redrawn for inclusion in architectural or other design drawings, because drafters may commit errors or omissions in the transfer process. Although photographic reproduction eliminates this problem, it does nothing to minimize the possibility of contractors misinterpreting the logs during bid prepara- tion. When this occurs, delays, disputes and unantici- pated costs are the all -too -frequent result. 'Ib minimize the likelihood of boring log misinterpreta- tion, give contractors ready access to the complete geotechnicai engineering report prepared or authorized for their use. Those who do not provide such access may proceed un- der the mistaken impression that simply disclaiming re- sponsibility for the accuracy of subsurface information always insulates them from attendant liability Providing the best available information to contractors helps pre- vent costly construction problems and the adversarial attitudes which aggravate them to disproportionate scale. READ RESPONSIBILITY CLAUSES CLOSELY Because geotechnical engineering is based extensively on judgment and opinion, it is far less exact than other design disciplines. This situation has resulted in wholly unwarranted claims being lodged against geotechnical consultants. Tb help prevent this problem, geotechnical engineers have developed model clauses for use in writ- ten transmittals. These are not exculpatory clauses designed to foist geotechnical engineers liabilities onto someone else. Rather, they are definitive clauses which identify where geotechnical engineers responsibilities begin and end. Their use helps all parties involved rec- ognize their individual responsibilities and take appro- priate action. Some of these definitive clauses are likely to appear in your geotechnical engineering report, and you are encouraged to read them closely. Your geo- technical engineer will be pleased to give full and frank answers to your questions. OTHER STEPS YOU CAN TAKE TO REDUCE RISK Your consulting geotechnical engineer will be pleased to discuss other techniques which can be employed to mit- igate risk. In addition, ASFE has developed a variety of materials which may be beneficial. Contact ASFE for a complimentary copy of its publications directory. Published by THE ASSOCIATION OF ENGINEERING FIRMS ASFIEPRACTICING IN THE GEOSCIENCES 8811 Colesville Road/Suite G 106/Silver Spring, Maryland 20910/(301) 565-2733 'J APPENDIX A FIELD EXPLORATION E-11278 Our field exploration was performed on November 16, 2005. Subsurface conditions at the site were explored by excavating thirteen test pits to a maximum depth of 17.5 feet below existing grade. The test pits were excavated by Aikin's Excavating, subcontracted to ECI, using a tracked excavator. ' The approximate test pit locations and elevations were determined by pacing from site features depicted on a site plan provided by Barghausen Consulting Engineers, Inc. The locations and elevations of the test pits should be considered accurate only to the degree implied by the method used. These approximate locations are shown on Plate 2. ' The field exploration was continuously monitored by a geologist from our firm, who classified the soils encountered, maintained a log of each test pit, obtained representative samples, and observed pertinent site features. All samples were visually classified in accordance with the Unified So# Classification System that is presented on the "Legend ," Plate Al, Logs of the test pits are presented on Plates A2 through A14. The final logs represent our interpretations of the field logs and the results of the laboratory tests on field samples. The stratification lines on the 1 logs represent the approximate boundaries between soil types. In actuality, the transitions may be more gradual. Representative soil samples were collected and returned to our laboratory for further examination and testing. 1 MAJOR DIVISIONS GRAPH LETTER TYPICAL DESCRIPTION SYMBOL SYMBOL O o C " C 0 ('W / Well -graded gravels, gravel -sand mixtures, Clean gravels ° ° i 9w littic or no fines Gravel and (little or no fines) ' • • GP Poorly -graded raded ravels, ravel sand y-9 g 9 gravelly ravels soils w w w 9P mixtures, little or no fines More than 50% • . GM coarse fraction Gravels with tines • 1 • 1 • • ' gm Silty gravels, gravel sand silt mixtures Coarse -grained sails retained on No 4 (appreciable amount GC i� Clayey gravels, gravel -sand -clay mixtures Sieve of fines) 9c ° ° ° °°° SW Well -graded sands, gravelly sands, little or no More than 50% Sand and sandy Clean sand ° sw fines material larger than No. 200 sieve size soils {little or no fines) ° ° aw °- SP Poorly -graded sands, gravelly sands, little or no More than 50% _¢° ° ° ° ° " : °� SIPfines SMi Silty sands, sand -silt mixtures coarse fraction passing No. 4 Sands with fines sin Sieve (appreciable amount of fines) SC / Clayey sands, sand -clay mixtures sc MLA Inorganic sifts and very fine sands, rock flour, ml silty -clayey fine sands, clayey silts with slight plasticity Silts Liquid limit CL inorganic clays of low to medium plasticity, gravelly Fine-grained soils and clays less than 50 el clays, sandy clays, silty clays, lean clays OL Organic silts and organic silty clays of low i t / of plasticity Mil Inorganic silts, micaceous or diatomaceous fine More than 50% material smaller than mh sand or silty soils 1200 sieve size Sills Liquid limit cH and clays greater than 50 / ch Inorganic clays of high plasticity, fat clays ,� •� ,� OH Organic clays of medium to high plasticity, ch organic silts Highly organic soils L �` ,' PT Peat, humus, swamp soils with high organic contents Topsoil W W w W W Humus and duff layer Fill Highly variable constituents ' The discussion in the text of this report is necessary for a proper understanding of the nature of the material presented in the attached logs. Dual symbols are used to indicate borderline soil classification. 1 C TORVANE READING, tsf 2" O.D. SPLIT SPOON SAMPLER qu PENETROMETER READING, tsf W MOISTURE, % dry weight = 2.4" I.D. RING OR SHELBY TUBE SAMPLER P SAMPLER PUSHED SAMPLE NOT RECOVERED WATER OBSERVATION WELL pcf DRY DENSITY, Ib, per cubic ft. 1 LL LIQUID LIMIT, % Z DEPTH OF ENCOUNTERED GROUNDWATER DURING PI PLASTIC INDEX EXCAVATION 1 SUBSEQUENT GROUNDWATER LEVEL WITH DATE 14 Earth Consultants, Inc. _ A Bureau Verrtas company LEGEND A 1 Test Pit Log 1 [ - I I I I Project Name: Sheet of Wehrman Property 1 1 Job No. Logged by: Date: Test Pit No.: 11278 E_ LW _ _ 11/16/05_ TP-1 Excavation Contractor: Approx. Ground Surface Elevation: Min's Excavating 451' — .. -- Notes: General Notes W ( ) eo E t2 m v U_ E w o V) E i Surface Conditions: Depth of topsoil and sod: 9"; ferns, mixed brush, blackberry brambles SM Reddish brown silty SAND, loose, moist 1 16.3 2 Brown silty SAND, medium dense, moist to wet (Glacial Till) SM 28.1 4 -iron oxide staining, contains gravel, weathered 5 -becomes dense, moist, less weathered .... Brown silty SAND with gravel, very dense, moist (Glacial Till) SM ' 7 8 9.5 9 -iron oxide staining 10 11 '3 12 13 ; -increase fines 6.9 14 Test Pit terminated at 14.0 feet below existing grade. No groundwater was encountered during excavation_ Test Pits excavated by Aikin's Excavating using an EX120 tracked excavator_ Elevations estimated from topographic lines depicted on a Preliminary site plan provided by Barghausen Consulting Engineers, nc. Earth Consultants Inc. Test Pit Log Wehrman Property A Bureau Vcritx Caqvny King County, Washington Praj. No. 1127$ Dwn. ELW Date Dec. 2005 Checked ELW Date 12/15/05 Plate A2 ouuaui Ictue WfIo"uons aepimeu represent our ooservauons at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by others of information presented on this log. Test Pit Log I I� Project Name: Wehrman Property Sheet of 1 1 Job No. 11278 Logged by: ELW Date: L 11/16/05 Test Pit No.: TP-2 _ Approx. Ground Surface Elevation: 437' Excavation Contractor: Aikin's Excavating - Notes: General Notes W M o aE L �, a. C o �- ct0n o n n cn surface conditions: Depth of topsoil and sod: 12"; ferns, mixed brush, blackberrybrambles 16.2 7.1 5.5 1.8 I 1 4 5 7 9 10 k f SM Brown silty SAND with gravel, loose, moist -iron oxide staining SM Gray silty SAND with gravel, very dense, moist (Glacial Till) Gray poorly graded SAND with silt and gravel, dense, moist (Advance Outwash) - - Test Pit terminated at 10.0 feet below existing grade. No groundwater was encountered during excavation. SP-SM - - I Earth Consultants, Inc. A Bur= Voitx C Iurq Test Pit Log Wehrman Property King County, Washington Proj. No. 11278 Dwn. ELW Date Dec. 2005 Checked ELW Date 12/15/05 Plate A3 Subsurface conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by 1 others of Information presented on this log. Test Pit Log Project Name: Sheet of Wehrman Property 1 Job No. Logged by: Date: Test Pit No.: 11278 ELW 91/16I05 TP-3 _ Excavation Contractor: Aikin's Excavating Approx. Ground Surface Elevation: 456' Notes: General Notes W % m a 0 u) CL 0 U_ E ❑ [o a [n Surface conditions: Depth of topsoil and sod: 8"; ferns, mixed brush SM Brown silty SAND, loose, moist i 1 10.6 2 -becomes moist to wet 3 - Gray silty SAND with gravel, dense, moist (Glacial Till) -trace iron oxide staining SM -_ 6.5 4 -becomes very dense 5 6 7.0 7 9 10 -J is 11 12 7.4 5.4 ° m 13 .. 14 Dark gray ppoorly ggraded SAND with silt and gravel, dense, moist (Advance Dutwash) -decrease fines SP-SM - ° 15 -contains sand and silt interbeds 16 17 Test Pit terminated at 17.0 feet below existing grade. No groundwater was encountered during excavation. VEarth Consultants Inc. a Test Pit Log Wehrman Property A Bwwu Vefizz Calmy King County, Washington Proj. No. 11278 Dwn. ELW Date Dec. 2005 Checked ELW pate 12/15/05 Plate A4 u Qwl law wIIUIUVI Ia u0pli'mu mplubul It uu( uuitaivauons at the nme and iocanon of tnls exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarilyrepresentative of other times and locations. We cannot accept responsibility for the use or interpretation by ' others of information presented on this og. Test Pit Log I Project Name: Sheet of Wehrman Property _ 1 1 Job No. Logged by: Date: Test Pit No.: 11278 ! ELW 11/16/05 TP-4 Excavation Contractor: Approx. Ground Surface Elevation: Aikin's Excavating 444' Notes: General Notes W (% o T cn T _ ©� 0 Q D u: Surface Conditions: Depth of topsoil and sod: 8"; ferns, mixed brush SM Brown silty SAND, loose, moist 1 14.2 21 SM Gray silty SAND with gravel, dense, moist (Glacial Till) -trace iron oxide staining, contains sand lens 8.3 4 -becomes very dense 5 6 7 8.7 8 10 Gray poorly graded SAND with gravel, dense, moist (Advance Outwash) 4 n,, d a d aQ SP 5.4 4.2% fines a 12 O G - 13 I Test Pit terminated at 13.0 feet below existing grade. No groundwater was encountered during excavation. Earth Consultants Inc. Test Pit Log Wehrman Property A Bum Vey Cwp=y King County, Washington Pro). No. 11278 Dwn. ELW Date Dec. 2005 Checked ELW Date 12/15/05 Plate A5 Subsurface conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or Interpretation by others of Information presented on this log. Test Pit Log 1 1 Project Name: Sheet of Wehrman Property _ __ 1 1 Job No. Logged by: 7"ate: Test Pit No,: 11278 Ei_W 11/16/05 {P_5 Excavation Contractor: Approx. Ground Surface Elevation: Aikin's Excavating 423 Notes: General Notes W o (0 } a o m E C7 cn L m °�' Am uk o 5 E cn Surface Conditions: Depth of topsoil and sod: 8"; ferns, mixed brush 14.4 3.2 27.5 6.0 n d d ; o b a a "o ' 1 4 5 7ML a i 10 11 12 13 14 15 SM Brown silty SAND, loose, moist -trace iron oxide staining Gray poorl graded SAND with silt and gravel, dense, moist (Advance 6utwash) -trace iron oxide staining SP-SM - Gray sandy SILT, medium dense, moist to wet (Advance Outwash) -contains sand and silt interbeds Gray poorly graded SAND with silt and gravel, dense, moist (Advance Outwash) Test Pit terminated at 15.0 feet below existing grade. No groundwater was encountered during excavation. a :T1 ;. SP-SM Earth Consultants, Inc. A BummVeruas Urluniy Test Pit Log Wehrman Property King County, Washington Proj. No. 11278 Dwn. ELW Date Dec. 2005 Checked ELW Date 12/15/05 Piate A6 Subsurface conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by ' others of information presented on this log. Test Pit Log 1 [i Project Name: Sheet of Wehrman Property 1 1 Job No. Logged by: Test Pit No.: 7Date: 11278 ELW 1/16/05 TP-6 _ Excavation Contractor: Approx. Ground Surface Elevation: Aikin's Excavating 394' Notes: - General Notes W (�fo) a- `� w a CL_ o m E Surface conditions: Depth of topsoil and sod: 12", ferns, mixed brush SM Reddish brown silty SAND, loose, moist 1 12 3 2 3 4 SM Gray silty SAND with gravel, loose to medium dense, moist (Recessional Oufwash) -trace iron oxide staining ss 5 -increase moisture, decrease fines -becomes moist to wet i'. 6 7 Gray silty SAND with gravel, dense, moist to dry (Recessional) SM 5.8 8 -contains beds of sandy silt, lightly cemented s 10 4.2 12 -increase moisture 13 14 - 16 4.3 17 E � f i Test Pit terminated at 17.5 feet below existing grade. No groundwater was encountered during excavation. (0) E ardi Consultants, Inc. Test Pit Log Wehrman Property A Bum= Vents C I" King County, Washington Proj. No. 11278 Dwn. ELW Date Dec. 2005 Checked ELW Date 12/15lOb Plate A7 buusur lace conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by others of information presented on this log, I Test Pit Log I I u I I I I I I I I I I I I I I I Project Name: Sheet of Wehrman Property Logged by: Job No Date: Test Pit No.: 11278 1 ELW 11/16/05 TP-7 Excavation Contractor: Approx. Ground Surface Elevation: Aikin's - Excavatin 403' Notes: W u) o Surface Conditions: Depth of topsoil and sod: 6"; ferns, mixed brush, General Notes M CL I-= 2 CL U- qu W E E �:' blackberry brambles a CO U) to SM Brown silty SAND with gravel, loose, moist 5.5 2SP-SM Gray poorly graded SAND with silt and gravel, medium dense, moist 3 (Recessional Outwash) 5.6 s. 6: 4 fl 5 7 SM Gray silty SAND with gravel, dense, moist (Recessional) 5,0 8 10 increase fines, increase moisture 11 12 7.7 13 Test Pit terminated at 13.5 feet below existing grade. No groundwater was encountered during excavation. 4. eo Test Pit Log 5 Earth Consultants, Inc. Wehrman Property A Bunuu Vmw Cory King County, Washington Pr0j, No, 11278 Dwn. ELW Date Dec.2005 Checked ELL Date 12/15/05 Plate A8 J Subsurface conditions depIcted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and Judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or Interpretation by others of Information presented on this log. Test Pit Log L I r 11 Project Name: Sheet of Wehrman Property 1 1 Job No. 11278 Logged by. ELW Date: ___FT�Plt.: 11/16/05 Excavation Contractor: Aikin's Excavating Approx. Ground Surface Elevation: 406' Notes: General Notes ov t°j U o C E C9 cn �, C E Q u� U o co E <n Surface Conditions: Depth of topsoil and sod: 14"; ferns, mixed brush 15.4 9.7 7.9 E i f 6.4 9.3 IM 1 2 3 4 5 6 7 8 9 14 11 12 13 14 15 16 17 SM Brown silty SAND with gravel, loose moist - SM Gray silty SAND with gravel, medium dense, moist (Recessional Outwash) -trace iron oxide staining -becomes moist to wet _ SM Gray silty SAND with gravel, dense, moist (Recessional) -trace iron oxide staining -increase fines i Test Pit terminated at 17.0 feet below existing grade. No groundwater was encountered during excavation. Earth Consultants Inc. A Bonus Vent. C Test Pit Log Wehrman Property King County, Washington Proj. No. 11278 Dwn, ELW Date Dec. 2005 Checked ELW Date 12/15/05 = Plate A9 Subsurlace conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by ' others of information presented on this log. Test Pit Log I 11 Project Name: Sheet of Wehrman Property 1 1 Job No. 11278 Logged by: Date: ELW i 11_/16/05 Test Pit No.: TP-9 Excavation Contractor: Approx. Ground Surface Elevation: Aikin's Excavating 389, Notes: — Genera! Notes W (/o) U a E �, LL E a M o u) E Z to Surface Conditions: Depth of topsoil and sod: 10"; ferns, mixed brush 5.7 5.8 7.5 ° ° 2 4 5 6 7 8 s 1Q 11 12 13 14 15 16 I I i� SM Reddish brown silty SAND, loose, moist - SP-SM Gray poorly graded SAND with silt and gravel, medium dense, moist (Recessional Qutwash) Gray silty SAND with gravel, dense, moist (Recessional) -18.8% fines — SM .. - Test Pit terminated at 16.0 feet below existing grade. No groundwater was encountered during excavation. Earth Consultants, Inc. A Bumtu Via Cal" Test Pit Log Wehrman Property King County, Washington Proj. No. 11278 Dwn. ELW Date Dec. 2005 1 Checked ELW Date 12/15/05 Plate Al .muusui idua wri"" ns aepiciea represenr our onservations at the time and location of this exploratory hole, modified by engineering tests, analysts and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by others of information presented on this log. Test Pit Log I I t I I I I I I I I I I I I I Project Name: Sheet Of Wehrman Property 1 1 Job No. Logged by-- Date: Test Pit No.: 11278 ELW 11/16/05 TP-1 0 Excavation Contractor: Approx. Ground Surface Elevation: Aikin's Excavating 435' Notes: General Notes W TcL E U) a0-0 cOL LL E to 0-6 u) E cn Surface Conditions: Depth of topsoil and sod., 10"; ferns SM Brown silty SAND with gravel, loose, moist 10.5 2 3 SM Gray silty SAND with gravel, very dense, moist (Glacial Till) -trace iron oxide staining 4 8.9 8 9 L -34.0% fines Test Pit terminated at 10.0 feet below existing grade. No groundwater was encountered during excavation. V Earth Consultants, Inc. Test Pit Log Wehrman Property A Bw= Verkz Cwpany King County, Washington Prej. No. 11278 Dwn, ELW Date Dec. 2005 Checked ELW Date 12/15/05 Plate Al I ,DUL)SU, lcluu L"immuiis uepimea represent our ooservaTions at me time and Jacation of this exploratory hole, modlfled by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by others of information presented on this log. Test Pit Log I I I I t I t I I I I I I I 11 I I 11 Project Name: Sheet of Wehrman Property ---------- Job No. [ Logged by. -bate: Test Pit No.: 11278 ELW 11/16/05 TP-1 1 Excavation Contractor: Approx. Ground Surface Elevation: Aikin's Excavating 442' Notes: General W ,2 -6 M Surface Conditions: Depth of topsoil and sod: 8"; ferns, mixed brush Notes a E 0 cD 6- E u) E SM Brown silty SAND, loose, moist 2 21.6 s: A 4 SM Gray silty SAND with gravel, dense, moist (Glacial Till) -iron oxide staining 6.5 -becomes very dense 7 GP -GM Brown poorly graded GRAVEL with silt and sand, -very dense, moist (Advance Outwash) • 8 -iron oxide staining, lightly cemented 1.8 10 11 Brown poorly graded SAND with silt and gravel, dense, moist SP-SM (Advance Outwash) 3.8 12 ro Ip 13 Test pit terminated at 13.0 feet below existing grade. No groundwater was encountered during excavation. Test Pit Log Earth Consultants, Inc. Wehrman Property A Bum= Veritz Ca?pvry King County, Washington wn. ELW T_ Proj. No. 11278 D I Date Dec,2005 I Checked ELW Date 12/15105 Plate Al2 Subsurface conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by othom of infnrmmfinn nrroe­+..A -, *k,;c i­ Test Pit Log H 1 Project Name: Wehrman Property Sheet of 1 1 Job No. Logged by: Date: Test Pit No.: 11278 ELW 11/16/05 TP-12 Excavation Contractor: Approx. Ground Surface Elevation: Aikin's Excavating 418' Notes: - General Notes ( /o) 2 a C E s „ m E o o E Surface Conditions: Depth of topsoil and sod: 10"; ferns, mixed brush 11.5 8.5 3.9 29.2 28.5 .11 � i i 1 2 3 a 5 s 7 s 9 10 11 12 13 14 i 15 16 17 SM Brown silty SAND, loose, moist -contains gravel 5M Gray silty SAND with gravel, medium dense, moist to wet (Recessional Outwash) -trace iron oxide staining -becomes dense, moist SM Brown silty SAND, dense, moist (Advance Outwash) -iron oxide staining f Gray sandy SILT, medium dense, moist to wet (Advance Outwash) -localized iron oxide staining — ML I Test Pit terminated at 17.0 feet below existing grade. No groundwater was encountered during excavation. 4_2 Earth Consultants, Inc. A Bun= Ve7w Cwparo Test Pit Log Wehrman Property King County, Washington Proj. No. 11278 Dwn. ELW Date Dec. 2005 Checked ELW date 12/15/05 Plate Al ouesurrace conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or interpretation by others of information presented on this log. Test Pit Log I I I I I I I I I I I I I I I I I Project Name: Sheet Of Wehrman Property 1 1 Job No. Logged by: Test Pit No.: 11278 ELW 11/16105 TP-1 3 Excavation Contractor: Approx. Ground Surface Elevation: Alkin's Excavating 406' Notes: General Notes vv ( /o) Q E T >' 0 U) CL ECL M ❑ W u) E Z) >1 CO Surface Conditions: Depth of topsoil and sod: 8"; ferns 12.8 10.4 5.7 26.6 6.4 8.4 2 3 4 6 7 8 10 11 12 13 14 15 16 SM — Brown silty SAND with gravel, loose, moist ----- — SM Gray silty SAND with gravel, medium dense, moist (Recessional Outwash -trace iron oxide staining SM Brown silty fine SAND, dense, moist (Advance Outwash) -lightly cemented Gray SILT, very stiff, moist (Advance Outwash) -localized iron oxide staining Brown silty SAND, dense, moist (Advance Outwash) -lightly cemented, contains sand and sift interbeds -reduced fines M L SM Test Pit terminated at 16.5 feet below existing grade. No groundwater was encountered during excavation. Eatfli Consultants, Inc. A Btff = Vey Caquny Test Pit Log Wehrman Property King County, Washington Proj. No. 11278 Dwn. ELW­� Date Dec. 2005 Checked ELW Date 12/15105 Plate A14 QuOsimi4ce wndmon5 depicted represent our ouservations at ine Time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or Interpretation by others of Information presented on this log. 1 APPENDIX B LABORATORY TEST RESULTS E-11278 11 1 Particle Size Distribution Report IX w 60 Z iL Z Z W U � 40 w 30 20 10 'dT _- II I it i I I i I I I II I i Mkl I f k I r .. i' i I � 200 100 10 1 0.1 0.01 0.001 GRAIN SIZE - mrn % COBBLES % GRAVEL % SAND % SILT I % CLAY USCS AASHTO PL LL 22.8 73.0 4.2 SP 19.3 61.9 18.8 SM 26.2 39.8 34.0 SM SIEVE PERCENT FINER inches size 1.5 100.0 100.0 100.0 3/4 89,2 100.0 100.0 3/8 82.2 91.6 84.5 GRAIN SIZE D60 0.733 0.627 1.34 D30 0.332 0.163 D10 0.184 COEFFICIENTS Cc 0.82 CU 3.98 SIEVE number PERCENT FINER O p 6 size 94 77.2 80.7 73.8 -98 73.6 73.9 66.4 # 16 67.3 66.5 58.6 #30 54.6 59.4 52.2 #50 25.7 45.7 45.2 4100 6.3 28.2 39.2 #200 4.2 19.8 340 SOIL DESCRIPTION O TP4:1P Cray poorly graded Sand with grave1;5.4% Moisture ❑ TP9: t 2.5' (fray silty Sand with gravel;7.5% Moisture A TP10:9.5' Cray silty Sand with gravel;6.1% Moisture REMARKS: O Sampled by:F,W Tested by:FTJ Reviewed byA'13D p Sampled by:EW Tested by:3 TJ Reviewed by:TRD A Sampled by:EW 'rostcd by:FTJ Reviewed b :TBD Source: Sample No.: TP4 Elev./1)eptb: 1 P n Source: Sample No.: TP9 Elev,/13epth: 12.5' * Source: Sample No,: TP10 Elev./Depth: 9.5' EARTH Client: Trinity land Development, LLC Project: Wehrman Property CONSULTANTS, INC. ProectNo.: E-11278 Plate BI 1 1 1 1 DISTRIBUTION E-11278 2 Copies to: Mr. Chris Austin Trinity Land Development, LLC 310 29th Street Northeast Puyallup, Washington 98372 9 Copies to: Ms. Ivana Halvorsen Barghausen Consulting Engineers, Inc. 18215 72nd Avenue South Kent, Washington 98032 +** HEATH & ASSOCIATES, INC. WEHRMAN PLAT TRAFFIC IMPACT ANALYSIS KING COUNTY, WA ,•r .+7L+- Prepared for: Chris Austin Transportation and Civil Engineering Trinity Land Development 1�7L; ." 310 29th St NE '(L"l' t Puyallup, WA 98373 A[ ?fie NOVEMBER 2005 J Y zo2w��en 2214 Tacoma Road • Puyallup, WA 98371 • (253) 770-1401 • Fax (253) 770-1473 WEHRMAN PLAT TRAFFIC IMPACT ANALYSIS 1 TABLE OF CONTENTS ' I. II. Introduction Project Description....................................................................................................3 3 III. Existing Conditions....................................................•---..............................................3 IV. Future Traffic Conditions.............................................................................................9 ' V. Conclusions and Mitigation.............................................•......................................--..19 I Appendix 1 LIST OF TABLES 1. Existing Level of Service...................•.........................................................................8 2. Trip Generation............................................................................................... ...........10 3. Future Level of Service.............................................................. .....18 1 LIST OF FIGURES ' 1. 2. Vicinity Map & Roadway System...............................................................................A Site Plan........................................................................................................................5 3. Existing Peak Hour Volumes........................................................•--............................7 4. Trip Distribution & Assignment (No Southerly Connection) ...... .............................. I I ' 5. Trip Distribution & Assignment (With Southerly Connection).................................12 6. 7. Pipeline Volumes (No Connection)...........................................................................13 Pipeline Volumes (With Connection)........................................................................14 ' 8. 9. 10. 2007 Peak Hour Volumes Without Project................................................................15 2007 Peak Hour Volumes With Project (No Connection).........................................16 2007 Peak Hour Volumes With Project (With Connection)......................................17 WEHRMAN PLAT TRAFFIC IMPACT ANALYSIS II INTRODUCTION This study serves to investigate traffic impacts related to the accesses of the proposed Wehrman Plat residential project. The primary goals of this study concentrate on the assessment of existing roadway conditions and intersection congestion, forecasts of newly ' generated project traffic, and estimations of future delay. Preliminary tasks include the collection of roadway information, road improvement information, and peak hour traffic counts. A detailed level of service analysis of the existing volumes is then made to ' determine the present degree of congestion on the network. Based on this analysis, forecasts of future traffic levels on the surrounding street system are determined. Following this forecast, the future service levels for the key intersections are investigated. As a final step, applicable conclusions and possible mitigation measures are defined. 1 II. PROJECT DESCRIPTION ' The proposed development consists of 35 single family detached housing units located in unincorporated King County just south of the City of Renton. The project site is located at the east end of SE 188th Street, on the south side. Access is to be provided by an internal plat street that connects to the end of 188th Street in a right angle turn. A southerly connection to the Fleuve des Voiles plat is possible, providing access through the plat to SE 192nd Street. Nearby land uses are primarily residential, with some ' commercial further to the west. Figure 1 on the following page shows the site location and roadway map while Figure 2 shows the site plan and access configuration for the site. III. EXISTING CONDITIONS A. Surrounding Street Network The street network serving the proposed project consists of a variety of roadways. ' Primary streets serving the site are two-lane arterials and multi -lane major arterials. Characteristics for most roadways vary with respect to lane widths, grades, speeds, and function. Differences are based on specific roadway designations and proximity to major ' employment areas to the north. The major roadways and arterials surrounding the site are listed and described below. ' SE 188th Street is an east -west local road that borders the north side of the project. The posted speed limit is 25 mph across the project site. No center stripe is provided, while 1 N WEHRM" PROPERTY A POM M of of err Ya of MUM oa roWMW = w- RMAM S E. *A KM amw",o" !r Ij11� , trrl t II 111 411iS128 11 1} 1 i} i, I I l t r l t I r -r c ii% t tf1 � � Ills tl ){ i l l l !I[+�■ �/lIt Isl Illt is f ,(., r' iii�l r1 tll, s.lkl I71��k1' WDIRMAN PLAT HEATH & ASSOCIATES, INC Transportation and Civil Engineering SITC PLAN fIGUSL2 total roadwaywidth is 20 feet. Shoulders are 2 to 4 feet wide and composed of p ' grass/gravel. Grades are generally in the 0 to 5 percent range. 120th Avenue SE is a north -south local road which ties to the west of the site. The posted ' speed Iimit along this roadway is 25 mph. Total road width is 19 to 20 feet, with no center stripe. Shoulders are comprised of grass/gravel and are 3 to 5 feet in width. Grades are level to rolling with slopes of 0 to over 10 percent. ' SE 192nd Street is an east -west, principal arterial that lies to the south of the site. The posted speed limit is 40 mph and lane widths are 11 to 12 feet. Roadway terrain is rolling with slopes up to roughly 10 percent. Surface material consists of asphalt concrete. Shoulders are generally 3 to 6 feet wide and paved. ' B. Roadway Improvements King County has targeted the SE 192nd St & 124th Ave SE intersection for signalization ' due to safety concerns. Project 401004 includes signalization, construction of a westbound left turn lane, and pedestrian improvements. The other nearby project is project 401595, which calls for widening of SE 192nd St from Benson Rd to 140th Ave SE, and includes pedestrian and intersection improvements. ' C. Peak Hour Volumes Field counts for this study were taken during the evening peak period between the hours of 4 PM and 6 PM. The morning peak period of 7 AM to 9 AM was also targeted for analysis. These peak hours generally represent the worst case scenario for residential developments with respect to traffic conditions. This is primarily due to the common ' 8 AM to 5 PM work schedule and the greater number of recreation and shopping trips associated with the late afternoon period. Shown in Figure 3 on the following page are the weekday PM peak hour volumes for the intersections of 120th Ave SE & SE 188th St, and 120th Ave SE & SE 192nd St. Additionally, an AM peak hour count was taken at the 120th Ave SE & SE 188th St ' intersection as directed by King County. ADT volumes for most roadways are available from the King County Traffic Division. tD. Level of Service Description Existing peak hour delays were determined using the Highway Capacity Manual. Capacity analysis is used to determine level of service (LOS) which is an established measure of congestion for transportation facilities. LOS is defined for a variety of ' facilities including intersections, freeways, arterials, etc. A complete definition of level of service and related criteria can be found in the HCM. The methodology for determining the LOS at signalized intersections strives to determine the volume to capacity (v/c) ratios for the various intersection movements as well as the average control 6 I I I I I I 11 I I I I I I I I I I I I 1 u 1 delay for those movements. Delay is generally used to measure the degree of driver discomfort, frustration, fuel consumption, and lost time. Control delay, in particular, includes movements at slower speeds and stops on intersection approaches as vehicles move up in queue position or slow down upstream of an intersection. Aside from the overall quantity of traffic, three specific factors influence signalized intersection LOS. These include the type of signal operation provided, the signal phasing pattern, and the specific allocation of green time. The methodology for determining the LOS at unsignalized intersections strives to determine the potential capacities for the various vehicle movements and ultimately determines the average total delay for each movement. Total delay is described as the elapsed time from when a vehicle stops at the end of queue until the vehicle departs from the stop line. Average total delay is simply the mean total delay over the entire stream. A number of factors influence potential capacity and total delay including the availability/usefulness of gaps. The range for intersection level of service is LOS A to LOS F with the former indicating the good conditions and the latter indicating the worst conditions with heavy control delays. Detailed descriptions of intersection LOS are given in the 2000 Highway Capacity Manual. Existing LOS is shown in Table 1. Level of service calculations were made using the computer analysis program known as HCS 2000 which follows unsignalized analysis procedures found in the Highway Capacity Manual. Refer to Chapter 17 of the HCM. TABLE 1 Existing Level of Service Intersection Control Geometry LOS Delay I20th Ave/ 188th St Stop Westbound A 8.8 (AM) Eastbound A 8.8 Northbound A 7.3 Southbound A 7.2 120th Ave/ 188th St Stop Westbound A 9.1 (PM) Eastbound A 9.2 Northbound A 7.3 Southbound A 7.3 120th Ave/192nd St Stop Northbound C 15.5 (PM) Southbound C 22.9 Eastbound A 7.9 Westbound A 9.7 As shown in the table, existing delays are low for the primary 120th Ave/l 88th St intersection during the morning and evening peak hours. The 120th Ave/ I92nd St intersection has somewhat higher delays at LOS C for the northbound and southbound approaches during the PM peak hour- 8 ' E. Non -Motorist Traffic Volumes Observations for pedestrian and bicycle activity were made at several road segments serving the site. Little non -motorist activity was noted during peak hour counts and during other visits to the area. Based on the location of the proposed development in relationship to areas which might attract non -motorist traffic, only minor pedestrian and bicycle traffic would be expected along the area roadways. Non -motorist amenities are not currently provided in the site vicinity. F. Sight Distance As directed by King County, an examination of the key intersection of 120th Ave SE & ' SE 188th St was made to determine whether adequate entering and stopping sight distance is provided. In accordance with King County standards shown in Table 2.1 of the King County Road Standards, a minimum entering sight distance (ESD) of 430 feet and a minimum stopping sight distance (SSD) of 200 feet is required for a 30 mph design speed. Grades at the 120th Ave & 188th St intersection are generally level except for the ' southbound approach on 120th Ave with a grade of over 10 percent. As SSD adjustments are required for negative grades but not positive grades, the SSD minimum would remain at 200 feet for the southbound approach but would be increased for the northbound lane of 120th Ave away from the intersection. From interpolation of King County standards, an additional 40 feet of SSD would be required for the northbound movement leaving the intersection. Based on field reviews, adequate sight distance is provided. SSD on the north leg of 120th Ave was measured at 240 feet, while SSD on the south leg was ' measured at 420 feet. ESD from the minor street approach of 188th St from the east was clear through the sag vertical curvature to the north, with ESD greater than 700 feet. Sight was maintained through the sag point roughly 450 feet to the north. A power pole on the northeast corner of the intersection was a minor hindrance. ESD to the south was approximately 700 feet. ' As the project would be located on an extension of SE 188th Street beyond the current dead end, stopping sight measurements could not be made for the new extension. Beyond ' the dead end towards the east is a large negative grade. Adequate stopping sight distance must be provided for the new SE 188th Street extension. IIV. FUTURE TRAFFIC CONDITIONS A. Trip Generation Trip generation is used to determine the magnitude of project impacts on the surrounding street system. This is usually denoted by the specific number of trips, which enter or exit a site during a designated time period. Generation data was taken from the well-known ' Institute of Transportation Engineers publication Trip Generation, Seventh Edition. The 1 1 specific land use for this site was Single Family Detached Housing under the designation ' of LUC 210. Table 2 gives a summary of project traffic for the 35 units. Average Daily Traffic and AM and PM peak hour volumes are given. TABLE 2 Trip Generation 35 Single Family Units Time Period Volume AWDT (est) 335 vpd AM Peak Inbound 7 vph AM Peak Outbound 20 vph ' AM Peak Total 27 vph PM Peak Inbound 22 vph PM Peak Outbound 13 vph ' PM Peak Total 35 vph As shown in the table, more trips are expected to be generated in the PM peak hour. The inbound/outbound split for the AM peak hour should be 25 percent entering and 75 percent exiting. The inbound/outbound split for the critical PM peak hour is expected to be roughly 63 percent entering and 37 percent exiting. ' B. Trip Assignment and Distribution The destination and origination of future project traffic primarily dictates how trips will ' disperse at nearby intersections. Trips generated by the project are expected to follow the general pattern shown in Figure 4. The distribution is based on distributions for other new projects in the area. Note that Figure 4 assumes no southerly connection through the adjacent Fleuve des Voiles plat to the south. Figure 5 shows the expected distribution with a southerly connection through Fleuve des Voiles in place. Easterly and southerly project traffic would be expected to use the connection if available. C. Future Traffic Volumes The owners of the project anticipate a completion date for the build out of this project by 2007. Therefore, 2007 was used as the horizon study year for a 2 year forecast. Future 2007 traffic volumes without the project were derived by applying a 3 percent annual growth rate to the volumes of Figure 3. This estimate of growth was previously specified by King County for this vicinity. The pipeline projects of Fleuve des Voiles and Cogger were considered for future volumes. The distribution of these projects would also be affected by the presence of a connection through Fleuve des Voiles to the Wehrman Plat. Figure 6 shows the pipeline volumes with no connection, while Figure 7 shows the expected pipeline volumes with the connection in place. 2007 intersection volumes 10 i 1 1 1 1 1 1 1 WEHRMAN PLAT HEATH & ASSOCIATES, INC Transportation and Civil Engineering i 1 ono 5 FN PEAK HR � o FPfo D O a INBOUND: 7 VPH OUTBOUND: 20 VPH PM PEAK HOUR TRIF5 INBOUND: 22 VPM OUTBOUND: I3 VPH TRIP 015TRIBUTION 4 A551GNMENT (NO 5OUTHERLY CONNECnON) FIGURE 4 1 1 1 1 1 1 i 1 1 1 1 1 1 1 u WEHKMAN PLAT HEATH & ASSOCIATES, INC Transportation and Civil Engineering I O% INBOUND: 7 VPH OUTBOUND: 20 VPH PM PEAK HOUR TRIPS INBOUND: 22 VPH OUTBOUND: 13 VPH TRIP DISTRIBUTION # ASSIGNMENT (WITH SOUTHERLY CONNECTION) FIGURE 5 1 1 1 1 1 1 1 1 1 1 U'EIAK WEHRMAN FLAT HEATH & ASSOCIATES, INC PIPELINE VOLUME5 Transportation and Civil Engineering (NO 5OUTMEKLY CONNECTION) FIGURE 6 1 t 1 1 1 1 1 U;'EtAK WEHKMAN PLAT HEATH & ASSOCIATES, INC PIPELINE VOLUMES Transportation and Civil Engineering (WITH SOUTHERLY CONNECTION) FIGURE 7 1 1 I CI WDHRMAN PLAT HEATH & ASSOCIATES, INC 2007 PEAK HOUR VOLUME5 WITHOUT PROJECT Transportation and Civil Engineering F>GU1zE 8 0 j 1 1 I without the project (background growth and pipeline trips only) are given in Figure 8. This figure is based on the assumption of no connection. 2007 volumes with project traffic included are shown in Figures 9 and 10, for the scenarios without and with the connection, respectively. ID. Future Level of Service ' The results of the future level of service analysis are given in Table 3 shown below. These results were again determined using the intersection analysis program HCSS 2000. ' As shown in the table, the 120th Ave & 188th St intersection would be expected to have LOS A delays for all approaches during both the AM and PM peak hour and without or ' with the southerly site connection to 192nd St. The 120th Ave & 192nd St intersection shows LOS C and LOS D delays for the northbound and souhbound approaches by 2007 without the project. Similar delays would be expected with the addition of project traffic. However, if a southerly project connection is assumed, delays for the southbound approach should drop to LOS C. 1 18 E. Left Turn Lane Warrants For this impact study, procedures described by the WSDOT Design Manual Figure 910- 8a were used to ascertain left turn lane requirements on SE 192nd Street at 120th Avenue ' SE. Assessments were made for the PM peak hour for the scenarios without and with the southerly connection in The project place. results of this assessment indicate that a left turn lane would not be needed on 192nd Street at 120th Avenue without or with the southerly project connection in place. Summaries of the results with the WSDOT charts ' are given in the appendix. IV CONCLUSIONS AND MITIGATION The Wehrman Plat project is a 35 single family lot subdivision located on the east end of SE 188th Street in unincorporated King County just south of the City of Renton. Roughly 335 daily trips would be created on a typical weekday of which approximately ' 35 trips are expected into and out of the site during the PM peak hour. During the AM peak hour, 27 total trips are expected to be generated. Primary access to the project would be via an internal road connecting to the end of SE 188th Street, however, a southerly connection to SE 192nd Street through the Fleuve des Voiles residential project may also be provided. 1 Mild traffic volumes currently exist on 120th Avenue SE and SE 188th Street, with moderate volumes on SE 192nd Street. Current delays are low for the 120th Ave/l88th St intersection, while the 120th Ave/192nd St intersection has some LOS C delays. Future roadway improvements in the vicinity include signalization of the 124th Ave SE & SE 192nd St intersection. Pedestrian/bicyclist traffic is currently minor during the morning and evening peak hours. Sight distance at the 120th Ave & 188th St intersection should be adequate despite some vertical curvature and high grades on the north leg of 120th Avenue. Future delay conditions in the area are outlined in Table 3. Based on the LOS analysis results, the intersections studied are expected to have some increases in delays due to project traffic. Southbound delays on 120th Ave at 192nd St may increase to LOS D by the 2007 horizon year, but should drop to LOS C if a southerly project connection to 192nd Street is provided. Left turn lane warrants for 2007 with the project would not be met for Central Valley Road at the project entrance without or with the southerly connection in place. 1 19 Based on the above, the following mitigations are identified for the Wehrman Plat project: Provide contribution towards the King County Mitigation Payment System. Wehrman Plat is located withing zone 342, which has a $3765 per residential single family unit cost. The mitigation fee would therefore be 35 units x $3765 = $131,775, ' Provide adequate stopping sight distance on the easterly extension of SE 1$8th Street. No other mitigations are identified. 1 20 F� WEHRMAN PLAT TRAFFIC IMPACT ANALYSIS APPENDIX 21 ' LEVEL OF SERVICE The following are excerpts from the 2000 Highway Capacity Manual - Transportation Research Board Special Report 209. Quality of service requires quantitative measures to characterize operational conditions within a traffic stream. Level of service (LOS) is a quality measure describing operational conditions within a traffic stream, generally in terms of such service measures as speed and travel time, freedom to maneuver, traffic interruptions, and comfort and ' convenience. Six LOS are defined for each type of facility that has analysis procedures available. Letters designate each level, from A to F, with LOS A representing the best operating conditions and LOS F the worst. Each level of service represents a range of operating conditions and the driver's perception of those conditions. ' Level -of -Service definitions The following definitions generally define the various levels of service for arterials. Level ofservice A represents primarily free -flow operations at average travel speeds, usually about 90 percent of the free -flow speed for the arterial classification. Vehicles are seldom impeded in their ability to maneuver in the traffic stream. Delay at signalized intersections is minimal. Level of service B represents reasonably unimpeded operations at average travel speeds, ' usually about 70 percent of the free -flow speed for the arterial classification. The ability to maneuver in the traffic stream is only slightly restricted and delays are not bothersome. ' Level of service C represents stable operations; however, ability to maneuver and change lanes in midblock locations may be more restricted than in LOS B, and longer queues, adverse signal coordination, or both may contribute to lower average travel speeds of ' about 50 percent of the average free -flow speed for the arterial classification. Level of service D borders on a range in which small increases in flow may cause ' substantial increases in approach delay and hence decreases in arterial speed. LOS D may be due to adverse signal progression, inappropriate signal timing, high volumes, or some combination of these. Average travel speeds are about 40 percent of free -flow speed. ' Level of service E is characterized by significant delays and average travel speeds of one- third the free -flow speed or less. Such operations are caused by some combination of adverse progression, high signal density, high volumes, extensive delays at critical intersections, and inappropriate signal timing. 1 22 Level of service F characterizes arterial flow at extremely low speeds, from less than one- third to one -quarter of the free -flow speed. Intersection congestion is likely at critical signalized locations, with long delays and extensive queuing. These definitions are general and conceptual in nature, and they apply primarily to uninterrupted flow. Levels of service for interrupted flow facilities vary widely in terms of both the user's perception of service quality and the operational variables used to describe them. For each type of facility, levels of service are defined based on one or more operational ' parameters that best describe operating quality for the subject facility type. While the concept of level of service attempts to address a wide range of operating conditions, limitations on data collection and availability make it impractical to treat the full range of operational parameters for every type of facility. The parameters selected to define levels of service for each facility type are called "measures of effectiveness" or "MOE's", and ' represent available measures that best describe the quality of operation on the subject facility type. ' Each level of service represents a range of conditions, as defined by a range in the parameters given. Thus, a level of service is not a discrete condition, but rather a range of conditions for which boundaries are established. ' The following tables describe levels of service for signalized and unsignalized intersections. Level of service for signalized intersections is defined in terms of average ' control delay. Delay is a measure of driver discomfort, frustration, fuel consumption and lost travel time, as well as time from movements at slower speeds and stops on intersection approaches as vehicles move up in queue position or slow down upstream of an intersection. Level of service for unsignalized intersections is determined by the ' computed or measured control delay and is determined for each minor movement. Signalized Intersections - Level of Service Level of Service A B D E F Control Delay per Vehicle (sec) s10 > 10 and �520 >20 and s35 > 35 and s55 >55and :580 > 80 1 23 1 Unsignal ized Intersections - Level of Service Level of Service B i C D ' F 1 E 11 Average Total Delay per Vehicle (sec) :510 >10and :515 > 15 and <25 > 25 and :535 > 35 and :550 > 50 As described in the 2000 Highway Capacity Manual, level of service breakpoints for all - way stop controlled (AWSC) intersections are somewhat different than the criteria used for signalized intersections. The primary reason for this difference is that drivers expect different levels of performance from distinct kinds of transportation facilities. The expectation is that a signalized intersection is designed to carry higher traffic volumes than an AWSC intersection_ Thus a higher level of control delay is acceptable at a signalized intersection for the same level of service. AWSC Intersections - Level of Service Level of Service A B D E F Average Total Delay per Vehicle (sec) s10 >10and <15 >15and :525 > 25 and <35 > 35 ands 50 > 50 1 24 Summary of Trip Generation Calculation For 35 Dwelling Units of Single Family Detached Housing November 10, 2005 Average Rate Standard Deviation Adjustment Factor Driveway Volume Avg. Weekday 2-Way Volume 9.57 3.69 1.00 335 7--9 AM Peak Hour Enter 0.19 0.00 1.00 7 7-9 AM Peak Hour Exit 0.56 0.00 1.00 20 7-9 AM Peak Hour Total 0.75 0.90 1.00 -?-& Z7 4-6 PM Peak Hour Enter 0.64 0.00 1.00 22 4-6 PM Peak Hour Exit 0.37 0.00 1.00 13 4-6 PM Peak Hour Total 1.01 1.05 1.00 35 AM Pk Hr, Generator, Enter 0.20 0.00 1.00 7 AM Pk Hr, Generator, Exit 0.57 0.00 1.00 20 AM Pk Hr, Generator, Total 0.77 0.91 1.00 27 PM Pk Hr, Generator, Enter 0.65 0.00 1.00 23 PM Pk Hr, Generator, Exit 0.37 0.00 1.00 13 PM Pk Hr, Generator, Total 1.02 1.05 1.00 36 Saturday 2-Way Volume 10.10 3.68 1.00 354 Saturday Peak Hour Enter 0.51 0.00 1.00 18 Saturday Peak Hour Exit 0.43 0.00 1.00 15 Saturday Peak Hour Total 0.94 0.99 1.00 33 Sunday 2-Way Volume 8.78 3.33 1.00 307 Sunday Peak Hour Enter 0.46 0.00 1.00 16 Sunday Peak Hour Exit 0.40 0.00 1.00 14 Sunday Peak Hour Total 0.86 0.95 1.00 30 Note: A zero indicates no data available. Source: Institute of Transportation Engineers Trip Generation, 7th Edition, 2003, TRIP GENERATION BY MICROTRANS n Heath & Associates Inc. 2214 Tacoma Road Puyallup, WA 98371 C',mimc Prinlael_ I InchKI=A File Name : untitied2 Site Code : 00002505 Start Date : 11/08/2005 Page No : 1 120TH AVE SE 188TH ST SE 120TH AVE SE 188TH ST SE Sorthbound Westbound Northbound Eastbound Start Time Right I Thru I Left Right I Thru Left Right Thru Left Right Thru Left Int. Total Factor 1.0 1.0 1.0 1.0 1.0 1.0 1.0 � 1.01 I 1.0 1.01 1.0 1.0 07:00 AM 0 6 0 0 5 0 1 2 1 0 0 0 15 07:15 AM 0 2 0 0 1 1 0 1 0 0 2 0 7 07:30 AM 1 3 0 0 0 2 0 3 0 2 0 0 11 07:45 AM 0 5 0 0 0 01 0 1 0 0 1 0 7 Total 1 16 0 0 6 31 1 7 1 2- 3 0 40 08:00 AM 1 3 0 0 0 0 0 5 0 0 Q 0 9 08:15 AM 3 4 0 0 0 1 0 4 1 0 1 3 17 08:30 AM 1 3 0 0 0 1 0 3 0 0 0 0 8 08:45 AM 2 3 0 0 0 1 0 3 0 1 0 1 11 Total 7 13 0 0 0 3 0 15 1 1 1 4 45 Grand Total 8 29 0 0 6 85 Apprch % 21.6 78A 0.0 0.0 1 50.0 50.0 4.0 88.0 8.0 27.3 36.4 36.4 I Total % 9A 34.1 0.0 0.0 7.1 7.1 1.2 25.9 2.4 3.5 4.7 4.7 120TH AVE SE Oul In Total 26 37 63 8 29 0 Right Thru Left -msn F e O C North ^ � m r � C r _ '" i`--1 1l8f2005 7:00:00 AM m 119/Z005 8:45:00 AM N o� o Unshifterl Q, a V � T ro Left Thru Right M® Out In Total 120THAVE SE Heath & Associates Inc. 2214 Tacoma Road Puyallup, WA 98371 File Name : untitled2 Site Code : 00002505 Start Date : 11/08/2005 Page No : 2 12OTH AVE SE Southbound �188TH ST SE Westbound 12OTH AVE SE Northbound 188TH ST SE Eastbound Start Time Right Thru Left App. Total Right I Thru Left App. Total Right Thru Left App. Total Right Thru Left App.Ent. Total Total Peak Hour From 07:00 AM to 08:45 AM - Peak 1 of 1 Intersection 08:00 AM Volume 7 13 0 20 Percent 35.0 65.0 0.0 08:15 Volume 3 4 0 7 Peak Factor High Int. 08:15 AM 3 4 0 7 'Volume Peak Factor 0.714 0 0 3 3 0.0 0.0 100. 0 0 0 1 1 08:15 AM 0 0 1 1 0.750 0 15 1 16 0.0 93.8 6.3 0 4 1 5 08:00 AM 0 5 0 5 0.800 120TH AVE SE Out to Total 19 24 39 7 13 0 Ri W Thru Left .7 1 4 Th 11812005 8:00:00 AM 118/2005 8:45:00 AM Ltnsfrrted w 4-1 T r LO Triru " hM 1 15 4 17 16 33 Out hn Total 12011`1 AVE SE 1 1 4 6 45 16.7 16.7 66.7 0 1 3 4 17 0.662 08:15 AM 0 1 3 4 0.375 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Heath & Associates Inc. 2214 Tacoma Road Puyallup, WA 98371 i;rnnnq Printarf- Hnchiftarl File Name : untitled2 Site Code : 00002505 Start Date : 11/02/2005 Page No : 1 120TH AVE SE 188TH ST SE 120TH AVE SE 188TH ST SE Southbound Westbound Northbound Eastbound Start T'mtia Right I Thru Left Right Thru Left R' ht Thru Left Right I Thru Left Int, Total Factor 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 04:00 PM 0 7 1 0 0 0 0 1 1 4 1 0 15 04:15 PM 0 3 0 0 2 0 D 0 0 4 1 1 11 04:30 PM 0 1 1 0 0 0 0 0 0 2 1 1 6 04:45 PM 0 3 1 1 0 0 1 3 5 2 2 1 01 18 Total 0 14 31 0 2 1 3 6 3 12 4 21 50 05:00 PM 0 2 0 2 0 1 1 4 2 0 1 2 15 0515 PM 1 6 0 0 2 0 0 3 0 0 1 0 13 05:30 PM 0 5 1 0 2 0 0 4 1 1 4 0 18 05:45 PM 0 1 1 0 1 1 1 5 1 0 D 1 12 Total 1 14 2 2 5 2 2 16 4 1 6 3 58 Grand Total 1 28 5 2 7 3 5 22 7 13 10 5 108 Apprch % 2.9 82.4 14.7 16.7 I 58,3 25.0 14.7 64.7 20.6 46.4 I 35.7 17.9 Total % 0.9 25.9 4,6 1.9 6.5 2.8 4.6 20.4 6.5 12.0 9.3 4.6 120TH AVE SE Out In Total 29 34 j 63 1 28 5 { igtd Thru Left ► � 1 V� o PfOith5. m Oo C N T t� 102005 4:00:00 PM ~11 V2l2005 6:45:00 PM 2 v ra L 00 Z tr<ad r 6 w N � +, T r Left Tt Ri fit 7 22 5 ® 34 78 Out In T* W 1 Heath & Associate s inc. 2214 Tacoma Road Puyallup, VITA 98371 1 120TH AVE SE 188TH ST SE Southbound Westbound ' Start Time Right Thru Left APP' Right Thru Left App Total Total Peak Hour From 04:00 PM to 05A5 PM - Peak 1 of 1 Intersection 04:45 PM ' Volume 1 16 2 19 2 4 2 8 Percent 5.3 84.2 10.5 25.0 50.0 25.0 05:30 Volume 0 5 1 6 0 2 0 2 Peak Factor High Int. 05:15 PM 05:00 PM Volume 1 6 0 7 2 0 1 3 ' Peak Factor 0.679 0.667 120TH AVE 5 Northbound Right I Thru I Left 4 16 5 25 16-0 64.0 20.0 0 4 1 5 04:45 PM 3 5 2 10 0.625 File Name : untitled2 Site Code : 00002505 Start Date : 11/02/2005 Page No : 2 Eastbound Right Thry Left App' Total 3 7 2 12 25.0 58.3 16.7 1 4 0 5 05:30 PM 1 4 0 5 0.600 120T AVE SE Otd In Total 20 19 F 39 1 16 2 Right Thru Lift sC4 r- � North � CV N pe s 2 m 112/2005 4,45:00 m 11212D05 5:30:00 PM A a oa� Unshffted -� o� f, T r Left Thru Ri ht 5 16 4 21 25 LE 46 Out In Trial 1 ZOTH AVE SE 64 18 0.889 Heath & Associates Inc. 2214 Tacoma Road Puyallup, WA 98371 i,rfN FnS Printari_ i Inzhiftari File Name : untitied2 Site Code : 00002505 Start Date : 11/02/2005 Page No : 1 120TH AVE SE 192ND ST SE 120TH AVE SE 192NO ST SE Southbound Westbound Northbound Eastbound Start Tme Ri ht Thru Left Right I Thru Left Right I Thru Left R" ht Thru I Left int_ Total Factor 1.01 1,01 1.0 1.0 1.0 1.0 1.01 1.01 1.0 1.01 1.01 1.0 04:00 PM 3 0 6 2 54 0 0 0 0 0 180 1 246 04:15 PM 1 0 1 0 76 0 0 0 0 0 163 0 241 04:30 PM 0 0 1 0 78 0 1 0 0 0 182 0 262 04A5 PM 1 0 1 1 5 57 01 0 0 01 0 189 3 256 Total 5 0 91 7 265 0 1 0 01 0 714 4 1005 05:00 PM 1 0 3 3 76 0 0 0 0 0 215 3 301 05:15 PM 3 0 3 1 56 0 1 0 0 0 220 3 287 05:30 PM 1 0 3 3 67 0 0 0 0 0 182 1 257 05:45 PM 1 0 3 2 62 0 0 0 0 0 186 4 258 Total 6 0 12 9 261 0 1 0 0 0 803 11 1103 Grand Total 11 0 21 16 526 0 2 0 0 0 1517 15 2108 Apprch % 34.4 0.0 65.6 3.0 97.0 0.0 100.0 0.0 0.0 0.0 99.0 1.0 I Total %Q 0.5 0.0 1.0 0,8 25.0 0.0 0.1 0.0 0.0 0.0 72.0 0.7 120TH' SE Ow In Total 31 32 63 11 D 21 Right Thru Left � 1 4 North o a -s m �e N �, r-► 1f2120054:00:00 PM 4 3 N ~ 1/212005 5:45:00 PMC)M N Cn 5 o L UnsMfted rn m� N T ro Left Thu Ru FA 0 0 2 ® 2 0 Out In Total Heath & Associates Inc. ' 2214 Tacoma Road Puyallup, VITA 98371 1 ' 120TH AVE SE Southbound 192Nb ST SE Westbound Start Time Right Thru Left 'pp' Right Thru Left App. Total Total Peak Hour From 04:00 PM to 05:45 PM - Peak 1 of 1 Intersection 04:30 PM ' Volume 5 0 8 13 9 267 0 276 Percent 38.5 0.0 61.5 3.3 96.7 0.0 ' 05:00 Volume 1 0 3 4 3 76 0 79 Peak Factor High Ink 05:15 PM 05:00 PM Volume Peak Factor 3 0 3 6 0.542 3 76 0 79 0.873 1 1 1 1 1 1 1 1 1 File Name : untitled2 Site Code : 00002505 Start Date : 11 /02/2005 Page No :2 120TH AVE SE 192ND ST SE Northbound Eastbound Right Thru Left To a' Right Thru Left 2 0 0 2 100. 0.0 0.0 0 0 0 0 0 04:30 PM 1 0 0 1 0.500 0 806 9 815 0.0 98.9 1.1 0 215 3 218 05:15 PM 0 220 3 223 0.914 12VTFI AVE SE OOA In Total 18 13 31 5 0 8 RighE Thru Leif 16 CD 0 North ` a� °m 2 2 °P r 17212005 4:30:00 PM—= N N — r. N ~ 112J2(3055:15:00PM 2 v m UnsNfted N - `-1 T r* Left Thru Ri fd 0 0 2 ® 2 02 t7u In Total 0 I nt. Total 1106 301 0.919 TWO-WAY STOP CONTROL SUMMARY 120th Ave SE 8 SE N rformed alysis Year Time Period escri tion E)(IST1NG AM PEAK HOUR VOLUMES st Street_ SE 188fh Sfrset orth/South Street: 120th Avenue SE ion Orientation_ Notfh-South Volumes and Adiusfmpnts a or Street ovement Northbound 1 2 3 Souhbound 4 5 6 L T R L T R plume 1 15 0 0 13 7 eak-Hour Factor, PHF ourly Flow Rate, HFR 0.80 1 0.80 18 0.80 0 0.71 0 0.71 18 0.71 9 ercent Heavy Vehicles ian Type T Channeiized anes 0 0 — 1 _ Undivided 0 0 0 0 — 1 0 0 onflguration stream Signal LTR 0 LTR 0 inor Street ovement 7 L Westbound 8 T 9 R 10 L Eastbound 11 T 12 R olume 3 0 0 4 1 1 Peak -Hour Factor, PHF 0.75 0.75 0.75 0.40 0.40 0.40 oudy Flow Rate, HFR 4 1 0 0 9 2 2 eroent Heavy Vehicles 0 0 0 0 0 0 Percent Grade (%) 0 0 tared Approach N N torage 0 0 RT Channelized apes 0 1 0 0 0 1 0 0 ^onfiguration LTR LTR pp roach hibvement NB 1 SB 4 Westbound 7 a 9 Eastbound 10 11 12 ane Gonfiguration LTR LTR LTR LTR (vph) (m)(Vph) 1 1600 0 1612 4 959 13 960 is 0.00 0.00 0.00 0.01 5%, queue length 0.00 0.00 0.01 0.04 ordrol Delay 7.3 7.2 8.8 8.8 OS A A A A roach Delay — — 8.8 8.8 pproach LOS — _ A A KlgnrS tceservea HCS2000t Vmim 4_ Id Copyright O 2003 Universityor Florida, All Rights Rtawed Version 4.Id TWO-WAY STOP CONTROL SUMMARY eneral Information Site Information nayst Agency/Co. Date Performed na sis Time Period Intersection Jurisdiction Analysis Year 120th Ave SE & SE 188th St Project Description 2007 AM PEAK HOUR VOLUMES IM'THOUT PROJECT EastNNest Street: SE 188th Street orth/South Street: 120thAvenue SE Intersection Orientalion: North -South IStudy Period hrs : 0.25 ehicle Volumes and Adjustments a or Street Northbound Southbound ovement 1 2 3 4 5 6 L T R L T R olume 1 16 0 0 14 7 eak-Hour Factor, PHF 0.80 0.80 0.80 0.71 0.71 0.71 ourty Flow Rate, HFR 1 1 19 1 0 0 19 9 ercent Heavy Vehicles 0 — — 0 — — edian Type Undivided T Channelized 0 0 anes 0 i 0 0 1 0 onfiguration LTR LTR stream Si nal 0 0 inor Street Westbound Eastbound Movement 7 8 9 10 11 12 L T R L T R olume 3 0 0 4 1 1 eak-Hour Factor, PHF 0.75 0.75 0,75 0.40 0.40 0.40 oury Flow Rate, HFR 4 0 t) 9 2 2 ercent Heavy Vehicles 0 0 1 0 0 1 0 0 Percent Grade (%) 0 0 fared Approach N N forage 0 0 T Channelized 0 0 nes 0 1 0 0 1 0 onfiguration LTR LTR EaQueue Length, and Level of Service proach NB Sa Westbound Eastbound Movement 1 4 7 a 9 10 11 12 Lane Configuration LTR LTR LTR LTR (vph) 1 0 4 13 (m)(vph) 1599 1611 955 956 Ic 0.00 0.00 0.00 0.01 queue length 0.00 0.00 0.01 0.04 trol Delay 7.3 7.2 6.8 8.8 Lo-rroach A A A A Delay -- — 8.8 8.8 pproach LOS -- — A A Rights Reserved HCS2000TM Copyright 02003 Univeaily or Florida, All Rights Reserved Ymion 4.ld Version 4.ld TWO-WAY STOP CONTROL SUMMARY eneral Information[Site Information Ave SE & SE ate Performed nalysis Year a sis Time Period Pro'ect I}escri Lion 2007 AM PEAK HOUR VOLUMES WITH PROJECT NO CONNECTION astlVVest Street: SE 188th Street orth/South Street: 120th Avenue SE ntersection Orientation: North-South[Study Period hrs : 0.25 ahicle Voltunp-q and Adit,ttmonta a or Street Northbound Southbound ovement 1 L 2 T 3 R 4 L 5 T 6 R olume 1 16 6 0 14 7 eak-Hour Factor, PHF 0.80 0.80 0.80 0.71 0.71 0.71 ourly Flow Rate, HFR 1 19 7 1 0 1 19 1 9 ercent Heavy Vehicles 0 — _ 0 _ — edian Type Undivided T Channelized 0 0 apes onfiguration 0 LTR 1 0 0 LTR 1 0 stream Signal 0 0 inor Street Movement 7 Westbound 8 9 10 Eastbound 11 12 L T R L T R olume 19 4 0 4 2 1 eak-Hour Factor, PHF 0.76 0.75 0.75 0.40 0.40 0.40 Houriy Flow Rate, HFR 25 5 0 9 4 2 ercent Heavy Vehicles 0 0 0 0 0 0 ercent Grade (°%) tared Approach 0 N 0 N torage 0 0 T Channelized 0 0 nes, 0 1 0 0 1 0 nflguralion - _ LTR LTR roach NB SB Westbound Eastbound ovement 1 4 7 t3 9 10 11 12 ane Configuration LTR LTR LTR LTR (vph) 1 0 30 15 (m)(vph) 1599 1601 929 930 lc 0.00 0.00 0.03 0.02 5% queue length 0.00 0.00 0.10 0.05 ontrol Delay 7.3 7.2 9.0 8.9 OS A A A A ach Delay - — 9.0 8.9 proach LOS — A A HCS3000- Copyright 0 2003 Univrsity of Florida, All Rights Rastrved Version 4.1d 11 a'or Street Northbound Soulhbound ovement 1 2 3 4 5 g L T R L T R alume 1 16 3 0 14 7 leak -Hour Factor, PHF ourty Flow Rate, HFR 0.80 1 0.80 19 0.80 3 0.71 0 0.71 19 0.71 9 rcent Heavy Vehicles 0 — _ 0 — _ edian Type T Channelized anes Undivided 0 0 0 1 0 0 1 0 onfiguralion L TR L TR stream S' nal 0 0 inor Street Westbound Eastbound ovement 7 8 9 10 11 12 L T R L T R plume 11 9 0 4 4 1 leak -Hour Factor, PHF 0.75 0,75 0.75 0.40 0.40 0.40 ourly Flow Rate, HFR 14 12 0 9 9 2 ercenl Heavy Vehicles 0 0 0 0 0 0 ercent Grade {°%) Jared Approach 0 N 0 N torage 0 0 T Channelized 0 0 r►es 0 1 0 0 1 0 nfiguration LTR LTR [Dela Queue Length, and Level of Service pproach NB SB Westbound Eastbound ovement 1 4 7 8 9 10 11 12 ne Configuration LTR LTR OR LTR (vph) 1 0 26 20 (m)(vph) Ic 1599 0.00 1607 0 00 895 0.03 905 0.02 5°% queue length 0.00 0.00 0.09 0.07 ntrof Delay OS 7.3 A 7.2 A 9.1 A 9.1 A proach Delay — — 9.1 9.1 proach LOS — — A A Rights Reserved ' HCS3000rti Copyright O 2003 University of Florida, All Rights Reserved Version 4_ Id Vmion4_td 1 it TWO-WAY STOP CONTROL SUMMARY eneral Information Site Information nalyst Agency/Co. Date Performed Analysis Time Period Intersection Jurisdiction Analysis Year 120th Ave SE & SE 188th St Project Description OCISTING PM PEAK HOUR VOLUMES astNWest Street: SE 188th Street orth/South Street: 120th Avenue SE Intersection Orientation: North -South IStudy Period hrs : 0.25 ehicle Volumes and Adjustments or Street Northbound Southbound ovement 1 2 3 4 5 6 L T R L T R olume 5 16 4 2 16 1 eak-Hour Factor, PHF 0.63 0.63 0.63 0.68 0.68 0.68 oudy Flow Rate, HFR 7 1 25 1 6 2 1 23 1 ercent Heavy Vehicles 0 -- — 0 — — edian Type Undivided T Channelized 0 0 anes 0 1 0 1 0 1 0 nfiguration L TR LTR Cream Signal 0 0 inor Street Westbound Eastbound ovement 7 8 9 10 11 12 L T R L T R olume 2 4 2 2 7 3 eak-Hour Factor, PHF 0.67 0.67 0.67 0.60 0.60 0.60 surly Flow Rate, HFR 2 5 2 3 11 4 Percent Heavy Vehicles 0 0 0 0 0 0 Percent Grade (%} 0 0 Flared Approach N N torage 0 0 T Channelized 0 0 nes 0 1 0 0 1 0 onfiguration LTR LTR I Queue Length. and Level of Service proaeh NB Se Westbound Eastbound ovement 1 4 7 8 9 10 11 12 ne Configuration LTR LTR LTR LTR (vph) 7 2 9 18 (m)(vph) 1604 1595 880 876 is 0.00 0.00 0.01 0.02 5%queue tength 0.01 0.00 0.03 006 Control Delay 73 T3 9.1 9.2 OS A A A A Approach Delay -- — 9.1 9.2 pproach LOS — — A A I Righ s Reserved HC32000ne Copynghl 02003 Univmaity of Florida, All Rights Reamed Vmawn 4. Id Version 4_ Id TWO-WAY STOP CONTROL SUMMARY General Information Site Information Analyst Agency/Co- Date Performed Analysis Time Period Intersection Jurisdiction Analysis Year 120th Ave SE 8 SE 1881h St Project Description 2007 PM PEAK HOUR VOLUMES WITHOUT PROJECT EastNVest Street: SE 188th Street orth/South Street: 120th Avenue SE Intersection Orientation: North-South[Study Period hrs : 0.25 ehicle Volumes and Adjustments or Street Northbound Southbound ovement 1 2 3 4 5 6 L T R L T R olume 5 17 4 2 17 1 eak-Hour Factor, PHF 0.63 0.63 0.63 0.68 0.68 0.68 ourly Row Rate, HFR 7 26 6 1 2 24 1 ercent Heavy Vehicles 0 - -1 0 — — edian Type Undivided T Channelized 0 0 nes 0 1 0 0 1 0 onfiguration LTR LTR stream Signal 0 0 inor Street Westbound Eastbound ovement 7 8 9 10 11 12 L T R L T R olume 2 4 2 2 7 3 eak-Hour Factor, PHF 0.57 0.67 0.67 0.60 0.60 0.60 Hourly Flow Rate, HFR 2 5 2 3 11 4 Percent Heavy Vehicles 0 0 0 0 0 0 Percent Grade (%) 0 0 lared Approach N N torage 0 0 T Channelized 0 0 nes 0 1 0 0 1 0 nfiguration LTR LTR Queue Length. and Level of Service proach NB SB Westbound Eastbound ent 1 4 7 8 9 10 11 12 ne Configuration LTR LTR LTR LTR (vph) 7 2 9 is (m)(vph) 1603 1593 878 875 /C 0.00 0.00 0.01 0.02 5% queue length 0.01 0.00 0.03 0.06 Control Delay 7.3 73 9.1 9.2 OS A A A A Approach Delay -- -- 9.1 9.2 [Approach LOS - — A A Rights Reserved HCS200nTM Copyright 02W3 Vniversrty or Flori* All Rights Reserved Version 4.1 d Version 4.1 d 7 1 1 TWO-WAY STOP CONTROL SUMMARY eneral Information ite Information nalyst gencylCoa Date Performed Analysis Time Period ntersection urisdiction nalysis Year 120th Ave SE 8 SE 188fh St Project Description 2007 PM PEAK HOUR VOLUMES WITH PROJECT NO CONNECTION astWest Street: SE 18M Street orth/South Street: 120th Avenue SE ntersection Orientation: North -South JS(udy Period hrs : 0.25 elticle Volumes and Ad'ustments a or Street Northbound Southbaund ovement 1 2 3 4 5 6 L T R L T R olume 5 17 22 2 17 1 Peak -Hour Factor, PHF 0.63 0.63 0.63 0.68 0.68 0.68 Hourly Flow Rate, HFR 7 26 34 2 24 1 Percent Heavy Vehicles 0 — — 0 — — edian Type Undivided T Channelized 0 0 Ones 0 1 0 0 1 0 onflguration LTR LTR stream Si nal 0 0 inor Street Westbound Eastbound Movement 7 8 9 10 11 12 L T R L T R olume 12 7 2 2 11 3 eak-Hour Factor, PHF 0.67 0.67 0.67 0.60 0.60 0.60 ourty Flow Rate, HFR 17 1 10 2 3 1 18 4 ercent Heavy Vehicles 0 0 0 0 0 0 rcent Grade (°k) 0 0 lared Approach N N torage 0 0 RT Channelized 0 0 Lanes 0 1 0 0 1 0 Configuration LTR LTR Delay, Queue Length. and Level of Service Approach NB SIB Westbound Eastbound Movement 1 4 7 8 9 10 11 12 Lane Configuration LTR LTR LTR LTR (vph) 7 2 29 25 (m)(vph) 1603 1556 853 832 Vic 0.00 0.00 0.03 0.03 queue length 0.01 0.00 0.11 0.09 Delay 7.3 7.3 9.4 9.5 [ontrol A A A A roach Delay -- — 9.4 9.5 roach LOS -- — A A Rights Reserved ' HCS2000— Copyright 8 2003 Unwmity of Florida, An Rights Reserved Version 4. Id 11 V onion 4.1 d TWO-WAY STOP CONTROL SUMMARY General Information Site Information Analyst Agency/Co, Date Performed Analysis Time Period Intersection Jurisdiction Analysis Year 120th Ave SE & SE 188th St Pro'ect Descri Lion 2007 PM PEAK HOUR VOLUMES WITH PROJECT TH CONNECTION East/West Street: SE 188th Street arth/South Street: 120th Avenue SE Intersection Orientation: North -South [Sludy Period hrs : 0.25 ehicle Volumes and Ad'ustments a or Street Northbound Southbound ovement 1 2 3 4 5 6 L T R L T R olume 5 17 13 2 17 1 eak-Hour Factor PHF 0.63 0,63 0.63 R68 0-68 0,68 ourty Flow Rate, HFR 7 26 20 1 2 1 24 1 ercent Heavy Vehicles 0 1 0 — ian Type Undivided T Channetaed 0 0 nes 0 1 0 0 1 0 oniguration LTR LTR stream Si nal 0 0 inor Street Westbound Eastbound Movement 7 6 9 10 11 i 12 L T R L T R olume 7 11 2 2 17 3 eak-Hour Factor, PHF 0.67 0.67 0.67 0.60 0.60 0.60 ourty Flow Rate, HFR 10 16 2 3 28 4 Percent Heavy Vehicles 0 0 0 0 0 0 Percent Grade (°%) 0 0 Flared Approach N N age 0 0 hannetized 0 0 in 0 1 0 0 1 0 iguration LTR LTR Queue Length. and Level of Service oach [ne NB SB Westbound Eastbound ement 1 4 7 8 9 10 11 12 Configuration LTR LTR LTR LTR h) 7 2 28 35 )(vph) 1603 1575 842 831 /e 0.00 0.00 0.03 0.04 5% queue length 0.01 0.00 0.10 0.13 Control Delay 7.3 T3 9.4 9.5 OS A A A A Approach Delay — — 9.4 9.5 proach LOS — -- A A Rights Reserved HC8700" Copyright O 2003 Univetuly of Florida, All Rights Reserved Version 4. 1d Version 4.1 d a'or Street Eastbound Westbound Movement 1 2 g A 5 6 olume veh/h L 9 T 806 R 0 L 0 T 267 R 9 Peak -hour factor, PHF 0.91 0.91 0.91 0.87 0.87 0.87 Hourly Flow Rate (vehfh) 9 885 0 0 306 10 Proportion of heavy vehicles, HV 0 Median type Undivided T Channelized? 0 0 Lanes 0 f 0 0 1 0 onfiguration stream Signal L TR 0 L TR 0 Inor Street Northbound Southbound Movement 7 8 9 10 11 12 L T R L T R olume veh1h 0 0 2 8 0 5 Peak -hour factor, PHF 0.50 0.50 0.50 0.54 0.54 0.54 Hourly Flow Rate (veh/h) 0 0 4 14 0 9 roportion of heavy vehicles, HV ercent grade (°%) 0 0 _F 0 0 0 0 0 0 Flared approach N N Storage 0 0 RT Channelized? 0 0 Lanes 0 1 0 0 1 0 onfiguration LTR LTR Control Delay, Queue Length, Level of Service Approach EB WB Northbound Southbound Movement 1 4 7 8 9 10 11 12 Lane Configuration LTR LTR LTR LTR Volume, v (vph) 9 0 4 23 capacity, cr„ (vph) 1256 773 347 224 !c ratio 0.01 0.00 0.01 0.10 Queue length (95%) 0.02 0.00 0.03 0.34 ontrol Delay (s/veh) 7.9 9.7 15.5 22.9 OS A A C C pproach decay (s/veh) — 15.5 22.9 pproach LOS — C C IJCSWOUR Copyright C 2003 University offlmda, All Rights Reserved Version 4Id 1 1 1 1 1 1 1 1 1 TWO-WAY STOP CONTROL SUMMARY eneral InformationSite Information na st en /Co. ate Performed nalysis Time Period Intersection 1120th Ave SE & SE 192nd St Jurisdiction nal sis Year I roect ❑escri tion 2007 PM PEAK HOUR VOLUMES WITHOUT PROJECT astNVest Street: SE 192nd Street With/South Street 120th Avenue SE tersection Orientation: East-West IStudy Period hrs : 0.25 ehicle Volumes and Adiustments Hourly Flow Rate (vehlh) 10 960 V- � r 0 V. V r 0 V.01 337 V.421 11 Proportion of heavy vehicles, PHv 0 _ — 0 Median type undivided RT Channelized? 0 0 Lanes 0 1 0 0 1 0 onfiguration LTR LTR U stream Signal 0 0 inor Street Northbound Southbound Movement 7 8 9 10 11 12 L T R L T R Volume vehth 0 0 2 8 0 5 Peak -hour factor, PHF 0.50 0.50 0.50 0.54 0.54 0.54 Hourly Flow Rate (vehih) 0 0 4 14 0 9 Proportion of heavy vehicles, V 0 D 0 0 0 0 rcent grade (%) 0 0 red approach [RT N N Storage 0 0 Channelized? 0 0 Lanes 0 1 0 0 1 0 Configuration LTR LTR Control Delay, Queue Len iffi. Level of Service Approach LB WB Northbound Southbound Movement 1 4 7 8 9 10 11 12 Lane Configuration LTR LTR LTR LTR Volume, v (vph) 10 0 4 23 apathy,c.(vph) 1222 725 314 191 e ratio 0.01 0.00 0.01 0.12 ueue length (95%) 0.02 0.00 0.04 0.40 ontrol Delay (siveh) 8.0 10.0 16.6 26.4 -OS A A C D pproach delay (slveh) — 1E6 26.4 pproach LOS — -- C D HCS20da- Copyright 02003 Unwmay of Florida, All Rights Reserved Version 4 1d General information TWO-WAY STOP CONTROL SUMMARY Inite Information Intersection urisdiction atvsis Year Analyst Agency/Co. Date Performed Analysis Time Period Ave EastMest Street: SE 192nd Street 0rlhl5outh Street: 120th Avenue 5E Intersection Orientation: East-West IStudy Period (firs): 0.25 Vehicle Volumes and Adjustments Ma'or Street Eastbound Westbound Movement 1 2 3 4 5 6 L T R L T R Volume (veh/h 19 874 0 0 294 19 Peak -hour factor, PHF 0.91 0.91 0.91 0.87 0.67 0,87 Hourly Flow Rate (veh/h) 20 960 1 0 0 1 337 1 21 Proportion of heavy vehicles, PHv 0 — — 0 — — Median type undivided RT Channelized? 0 0 Lanes D i 1 0 0 1 0 onfigu ration L TR LTR stream Signal 0 0 r Street Northbound Southbound ment 7 8 9 ip 11 12 r.eak-hour L T R L T R me vehlh 0 0 2 i3 0 10 factor, PHF 0.50 0.50 0.50 0.54 0.54 0.54 ourly Flow Rate (veh/h) 0 0 4 24 0 18 Proportion of heavy vehicles, PHv 0 0 0 0 0 0 Percent grade {%) 0 0 Flared approach N N Storage 0 0 RT Channelized? 0 0 Lanes 0 1 0 0 1 0 Configuration LTR LTR Control Delay,Queue Len rth. Level of Service Approach Eta WB Northbound Southbound Movement 1 4 7 8 9 14 11 12 Lane Configuration LTR LTR LTR LTR Volume, v (vph) 20 0 4 42 opacity, c. (vph) 1212 725 314 192 /c ratio 0.02 0,00 0.01 0,22 ueue length (95%) 0.05 0.00 0.04 0.81 ontrol Delay (s/veh) 8.0 10.0 16.6 28.9 LOS A A C D pproach delay (s/veh) — -- 16.6 28.9 pproach LOS -- C D HCS2600— Copyright 0 2003 University or Fl.r.6, Alf Rights Reserved TWO-WAY STOP CONTROL SUMMARY General Information Site Information Intersection 120th Ave St & SE 192nd St Jurisdiction WDatePerformed nal sis Year e Period Project Description 2007 PM PEAK HOUR VOLUMES WITH PROJECT WITH CONNECTION East/West Street: SE 192nd Street North/South Street: 120th Avenue SE Intersection Orientation: East-West IStudy Period hrs : 0.25 Vehicle Volumes and Adjustments a'or Street Eastbound Westbound Movement 1 2 3 4 5 6 L T R L T R Volume veh/h 19 866 0 0 290 10 Peak -hour factor, PHF 0.91 0.91 0.91 0.87 0.87 0.87 Hourly Flow Rate (veh/h) 20 953 0 0 333 11 Proportion of heavy vehicles, PHv 0 — — 0 — Median type Undivided RT Channelized? 0 0 Lanes 0 1 0 0 1 0 Configuration LTR I LTR Upstream Signal 0 nor Street Northbound Southbound vement 7 8 9 10 11 12 [Peak-hour L T R L T R lume veh/h 0 0 2 8 0 10 factor, PHF 0.50 0.50 0.50 0.54 0-54 0.54 Hourly Flow Rate (veh/h) 0 0 4 14 0 i8 Proportion of heavy vehicles, Hv 0 0 0 0 0 0 Percent grade (%) 0 0 Flared approach N N Storage 0 0 RT Channelized? 0 0 Lanes 0 1 0 0 1 0 Configuration LTR LTR Control Delay, Queue Len th Level of Service Approach EB WB Northbound Southbound vement 1 4 7 B 9 10 11 12 ne Configuration LTR LTR LTR LTR lume, v (vph) 20 0 4 32 pacity, cln (vph) Io"ntrol 1226 729 317 236 ratio 0.02 0.00 0.01 0.14 eue length (95%) 0.05 0.00 0.04 0.46 Delay (s/veh) 8.0 9.9 16.5 22.6 LOS A A C C Approach delay (s/veh) - -- 16.5 22.6 Approach LOS - C C W-82000— Cupyrighl O 7003 University of Florida, All Righu Reserved Version 4 Id Below CUM% sWWO not needed for CWO*. llbo" cum, K~ WOWS raoanMMIed. i cw 1100 low 900 800 T00 �AMp� � �t,�ptrtC� 600 G00 4W 5 20 is 10 5 300 0 % Total DHV Twrnkv belt (eftle wing mommmil) I (1) DHV is total volume from both directions. (2) Speeds are posted speeds. Left -Turn Storage Guidelines (Two -Lane, Unsignalized) Figure 910 $a Z 9 v w 0 v } 04 w z o z � t„1 a 6 � W a � w:z W XA 3 o 4 W tu W A 0 N 4 [- "Q' H Design Manual M 22-01 January2005 Intersections At Grade page 910-19 1 1 1 1 1 1 1 1 1 1 1 KEY: Below cunt% a6oragle not needed for Y- �J Abon curve, iurlher ammysis recomrnerWed. �DµpY1C� IBO 5 20 15 10 5 0 % TOM DIN Tunes Left (strgle turnit ftOMMeM 1 (1) DW is total volume from troth directions. (2) Speeds are posted speeds. Leif Tum Storage Guidelines (Two -Lane. Unsignalized) Rgure 9104a Design Manual M 22-01 January2006 1200 0 U- 1100 0 u W z 1000 u w x f- 900 Z� a a00 `a I" '0 G U ~ p 700 tU 4— a Q oL 4L 000 VN LU 7 I lit 600 -- > ao !— u! = w z A � x 400 A a z Q w . 300 u! v1 0 0 4 CL u1 Le --I Intersections At Grade Page 910-19 r-Ce seneuule, Mitigation Payment System, Aoau-wrvices olVrslori,_ - rlLLP://WWW-11]CklOKU.rUV/Kt:UUUIOdUSePidillilllg;]I]PWICCSl:ueuwC.4;rin 1 King County MEM= GM kin dews Go Site index Online Directory Services ' Bridges Citizen requests ' Closures & delays Commuter info Contact us Doing business Engineering Environment Maps Planning Safety Signs Your Roads About us Links for... Businesses Communities Commuters Job seekers Teachers & kids Volunteers Other links Regional You are. in: Transportation > Road Services > Mitigation Payment System (MPS) > Residential fee schedule Mitigation Payment System (MPS) residential fee schedule The multifamily residential fee shall be determined based on the appropriate single- family fee multiplied by 0.6. The residential MPS fee for any unincorporated area not listed within a zone on the King County residential fee schedule shall be $189. Effective Oct. 28, 2002: Zone Fee Zone Fee Zone Fee Zone Fee 70 $24 71 $27 75 $61 85 $1082 86 $330 88 $348 89 $457 90 $865 102 $223 108 $2125 113 $256 115 $451 117 $1078 120 $305 121 $183 124 $130 126 $76 128 $87 129 $80 132 $79 133 $1 134 $4621 135 $3380 136 $4545 137 $4651 138 $3777 139 $3164 140 $1910 141 $1741 142 $1685 143 $1517 144 $791 145 $746 146 $793 147 $617 148 $411 149 $371 176 $42 177 $37 178 $18 179 $11 180 $23 181 $35 182 $48 183 $60 184 $68 185 $147 187 $43 188 $51 189 $63 190 $55 191 $69 192 $85 194 $166 195 $137 196 $262 199 $137 200 $81 215 $1283 216 $797 I of 4 11/10/2005 4:59 PM ree seneaule, Mitigation Yaymenl JySICIII, Koau JCrvices Ulvlslon,.. 1 n t[p:r/ www.In GIluK4.guvr K(;uuu ruaust }Il Ull ll a kyi ul PW IUrSCJInuul C.ele1I 223 $143 226 $229 227 $169 232 $166 233 $196 234 $238 235 $178 236 $200 ' 239 $76 240 $50 241 $40 242 $75 243 $75 257 $35 258 $60 259 $65 ' 260 $51 263 $38 264 $2975 265 $889 266 $1581 267 $1845 268 $1402 269 $1082 270 $1020 271 $1099 272 $1023 273 $1161 ' 274 $2034 275 $4311 276 $2400 277 $1080 278 $1045 279 $1291 280 $558 281 $1689 282 $653 283 $518 284 $513 ' 289 $378 290 $421 292 $866 295 $5488 296 $7535 297 $997 298 $2928 299 $6474 300 $1925 ' 301 $2050 302 $2018 303 $6455 304 $1962 ' 305 $4734 306 $6330 307 $6058 311 $1092 312 $1577 313 $1058 314 $1581 316 $258 317 $315 318 $524 319 $427 320 $1207 321 $1402 325 $1374 326 $2295 327 $1901 ' 328 $1256 331 $4748 333 $829 334 $1775 335 $1862 336 $4696 337 $6406 338 $5014 ' 339 $5615 340 $3181 341 $3362 342 $3785 ' 343 $1246 344 $2931 345 $3752 346 $3959 347 $1812 348 $2957 349 $2997 350 $1669 ' 351 $650 354 $767 355 $1606 356 $695 357 $1552 358 $2200 359 $1711 363 $2562 ' 365 $617 366 $918 367 $2775 369 $2932 370 $495 371 $556 372 $388 373 $497 ' 374 $181 375 $322 376 $368 377 $251 1 of 4 1 11/10/2005 4:59 PM �ee seneduie, Mitigation rayment 6ystem, Koaa ,5ervices t)rvision,... nttp:rlwww.metroKc.goviKcuouroausipianningimpsi teeseneouie.eim ' 378 $447 379 $237 380 $218 381 $172 382 $6200 383 $5584 384 $4880 385 $5843 ' 386 $5481 387 $5007 388 $7136 389 $4819 390 $3313 391 $3201 392 $3828 393 $4698 394 $4784 395 $2327 396 $4799 397 $3061 398 $3109 399 $2223 400 $2091 401 $1412 ' 402 $1414 403 $1204 404 $1093 405 $1124 406 $2227 407 $2169 408 $3253 409 $3031 410 $4295 411 $1156 416 $3693 417 $2436 418 $2364 419 $1483 424 $872 425 $836 426 $899 427 $719 428 $1547 431 $991 ' 432 $2303 433 $2367 434 $1540 435 $1328 ' 436 $2293 437 $1222 439 $1213 440 $4597 441 $2164 442 $2918 443 $2129 449 $2750 450 $1565 451 $1675 452 $2139 453 $1485 454 $1565 455 $449 456 $1412 tFor further information, please contact: Jeff Lee, Transportation Planner King County Department of Transportation ' Road Services Division 201 South Jackson Street MS KSC-TR-0317 ' Seattle, WA 98104-3856 (206) 2634759 To find out what the MPS zone and fee is for your residential proposal, contact the King County Department of Development and Environmental ' Services (DDES), Building Services Division at (206) 296-6600. You can link to DDES property research at Parcel Search GIS Application, DDES to determine which zone your development is in. (NOTE: You will want to go to ' the advanced users site, enter a parcel number, address or intersection, then click on the districts button to see which MPS zone your development is in.) ' Updated: Sept. 1, 2005 ' To2 of Pace Icing County ' Department of Transportation f4 11/10/2005 4:59 PM Road Services Division Department of Transportation KSC-TR-0231 201 South Jackson Street Seattle, WA 98104-3856 May 30, 2008 De -En Lang 10658 Riviera Place NE Seattle, WA 98125 RE: Road Variance L08VO033 — Wehrman Subdivision Dear Mr. Lang: Thank you for your application for a variance from the 1993 King County Road Standards (KCRS). You requested a variance from Section 3.01 concerning the number of lots accessing a joint use driveway (JUD). You propose four JUDs, each of which would serve four lots. Section 3.01 of the KCRS limits a JUD to two lots. We reviewed your proposal and decided that it is not in the public interest to allow four lots on a JUD. The Public Rule on Procedures for Requesting Variances from the KCRS (PUT 10-2) stipulates that a variance must produce a compensating or comparable result which is in the public interest. Your proposal is for four lots on a JUD, where the KCRS allows two, and therefore it fails to meet the criteria in the Public Rule. Specifically, the proposal does not produce a compensating or comparable result. 1 respectfully deny the request for four lots on a JUD. I suggest a private access tract (PAT) design that meets the KCRS. A PAT design meeting the 2007 King County Road Design and Construction Standards would also be acceptable. This decision applies only to 1993 King County Road Standards identified in the variance request. All design requirements in the KCRS and other regulations, such as surface water management and zoning, must be satisfied for a land use permit application. The applicant retains the rights and privileges afforded by King County Code and adopted Public Rules pertaining to road variance processing (KCC 14.42, PUT 10-2). Per Section 6.7 of the Public Rule, variance appeals trust be made to the Director of the Department of Transportation within thirty days of this variance decision. 4.4w— De -En Lang May 30, 2008 Page 2 A copy of staff s analysis, findings, and conclusions is enclosed. If you have any questions, please call Craig Comfort, Road Variance Engineer, Traffic Engineering Section, at 206-263-6109. Sincerely, Paulette Norman, P.E. County Road Engineer Enclosure cc: James Sanders, P.E., Development Engineer, Land Use Services Division (LUSD), Department of Development and Environmental Services (DDES) Pete Dye, P.E., Senior Engineer, LUSD, DDES Linda Dougherty, Division Director, Road Services Division (RSD), Department of Transportation (DOT) Matthew Nolan, P.E., County Traffic Engineer, Traffic Engineering Section (TES), RSD, DOT Fatin Kara, P.E., Supervising Engineer, TES, RSD, DOT Kris Langley, Senior Engineer, TES, RSD, DOT Craig Comfort, P.E., Road Variance Engineer, TES, RSD, DOT k19 King County Icing County Road Services Division Department of Transportation Traffic Engineering Section KSC-TR-0222 201 South Jackson Street Seattle, WA 98104-3856 May 30, 2008 TO: Variance File FM: Craig Comfort, P.E., Road Variance Engineer, Traffic Engineering Section RE: Road Variance L08V0033 Wehrman Subdivision — Related File L04P0027 Applicant's Presentation_ 1. The Wehrman Plat is proposed for 30 lots and is located east of the terminus of SE 188th Street and north of the terminus of 124th Avenue SE. The preliminary plat of Fleuve des Voiles is located directly to the south. A variance is requested to allow up to four lots on a joint use driveway (JUD). 2. The 30-percent slopes on the west side of the road make access designs most difficult. The four JUDs that are proposed on the west side of 122nd Avenue SE would provide access to four lots each. The design of the JUDs is consistent with Section 2.093 of the 2007 King County Road Design and Construction Standards (KCRDCS) which allows private access tracts (PATs) to serve six lots with 18 feet of paving. The variance will provide for superior road alignment, reduces cuts and fills, reduces the number of access points off 122nd Avenue SE, reduces on -street parking, and provides better connection to undeveloped properties to the north. Staffs Findings and Conclusions: 1. Section 3.01.C.3 of the 2007 KCRDCS allows two parcels to serve a JUD. The KCRDCS stipulates that a variance is to be judged on the likelihood that such variance will produce a compensating or comparable result, in every way safe and adequate for the public. Your variance submittal has not demonstrated that the proposal is either compensating or comparable. The proposal for four lots is not comparable to the two lots allowed on a JUD. There are other designs, such as private access tracts, that could be utilized to meet the KCRDCS. King County Department of Development and Environmental Services 900 Oakesdale Avenue 5W Renton, WA 98055-1219 January 3, 2006 Trinity Land Development, LLC Attn. Clark McGowan 310 29" Street NE Puyallup, WA 98372 RE: Application for the Preliminary Plat of Wehrman DDES File No. L04P0027 Dear Mr. McGowan: The January 3, 2006 letter requesting an extension of the deadline for submittal of the additional information required to process the preliminary plat application of Wehrman has been received. The request for additional information stops all processing of the plat application until the required information is received. The time spent waiting for information to be submitted is not counted toward any time limit requirements of the plat application process. The previous letter established a deadline of January 3, 2006. We are granting an extension to this deadline. If the Land Use Services Division of DDES does not receive the necessary information requested to process your application by February 3, 2006, your application will be canceled or denied. If you have any questions regarding this matter, please call me at (206) 296-7194. Sincerely, Ch� Tibbits, AtJect Manager II Current Planning Section Cc: Barghausen Consulting Engineers, Attn. Ivana Halvorsen, 18215-72"d Avenue South, Kent, WA 98032 Kim Claussen, Project/Program Manager III, Current Planning Section, LUSD Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD Kris Langley, Senior Engineer, KCDOT Application File King County Department of Development and Environmental Services 900 Qakesdale Avenue Southwest Renton, WA 98055-1219 January 12, 2006 Trinity Land Development, LLC Attn. Clark McGowan 310-29th Street NE Puyallup, WA 98372 RE: Subdivision — Cancellation of Application Application File No. L04P0027 (Wehrman) Dear Mr. McGowan, On October 6, 2005, you were notified that additional information was necessary to continue the review of the proposed preliminary plat application. The deadline established was January 3, 2006. To date the additional information requested has not been received nor has any other correspondence been received. Therefore, this application has been canceled. A new application submittal will be required in the future if you wish to pursue an application. If you have any questions on this matter, please contact me at (206) 296-7194 Thank you. Chad Tibkfits, Planner II Current Planning Section CC' Barghausen Consulting Engineers, Attn. lvana Halvorsen, 18215-72" d Avenue South, Kent, WA 98032 Lisa Dinsmore, Current Planning Supervisor, Current Planning Section, LUSD Km Claussen, Planner III, Current Planning Section, LUSD, Bruce Whiitaker, Senior Engineer, Engineering Review Section, LUSD Kris Langley, Senior Engineer, Traffic & Engineering Section, KCDOT Chad Tibbits, Planner II, Current Planning Section, LUSD, File 1 1 1 1 1 1 1 1 1 1 1 1 1 WETLAND DELINEATION REPORT Wehrman Property Section 39, Township 23 North, Range 5 East, W.M. King County, Washington Prepared for: Trinity Land Development, L.L.C. 310 — 29th Street NE Puyallup, WA 98372 December 10, 2004 Our Job No.11418 q- I�) 416 0 631! ZCIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTALSERVICES n - 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX °y r BRANCH OFFICES ♦ OLYMPIA, WA ♦ TEMECULA, CA ♦ WALNUT CREEK, CA www.barghausen.com 11 WETLAND DELINEATION REPORT Wehrman Property Section 39, Township 23 North, Range 5 East, W.M. King County, Washington Prepared for: Trinity Land Development, L.L.C. 310 — 29th Street NE Puyallup, WA 98372 December 10, 2004 Our Job No.11418 CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAx BRANCH OFFICES ♦ OLYMPIA, WA ► TEMECULA, CA ♦ WALNUT CREEK, CA www.barghausen.com ' EXECUTIVE SUMMARY ' The findings and conclusions presented in this report are based on an interpretation of information currently available to Barghausen Consulting Engineers, Inc. This summary is for introductory purposes and should be used only with the full text of this report. This wetland delineation was based on the On -Site Determination Method described in the Washington State Wetland Identification and Delineation Manual (1997) and the U.S. Army Corps of Engineers Wetland Delineation Manual (1987). Based on the information derived through site reconnaissance and ' readily available documents, one wetland was identified on the eastern boundary of the property. The wetland is located in the Soos Creek Drainage in the Duwamish River Basin. The on -site portion of the wetland is a Palustrine scrub -shrub, emergent, seasonally flooded to saturated system. Soos Creek is ' located off of the site to the east. Soos Creek is a 2S stream requiring a 100-foot buffer. The wetland is classified as a Class 1 Wetland requiring a 100-foot buffer. Agencies with jurisdiction over wetland identified on this site include King County, the U.S. Army Corps of Engineers, and the Washington State Department of Ecology. The Washington State Department of Fish and Wildlife have jurisdiction over work in and near Soos Creek. I-1 - 1141M9.doc rMDldm] TABLE OF CONTENTS 1.0 INTRODUCTION........................................................................................................................... 1 1.1 Scope of Services............................................................................................................... 1 1.2 Site Location and Description............................................................................................ 1 2.0 DOCUMENT REVIEW.................................................................................................................. 1 2.1 U.S.G.S National Map........................................................................................................ 1 2.2 Soil Survey of King County Area, Washington TO DO YET ........................................... 2 2.3 King County iMap.............................................................................................................. 2 2.4 Washington Streams and Salmon Utilization Catalog Review .......................................... 2 3.0 SITE RECONNAISSANCE............................................................................................................ 2 3.1 Site Conditions During Site Visit....................................................................................... 2 3.2 Topography.........................................................................................................................3 3.3 Fauna.................................................................................................................................. 3 3.4 Vegetation...........................................................................................................................3 3.5 Soils............................................................................... .... 3 3.6 Hydrology....................................................................... .....3 ............................................... 4.0 WETLAND AREAS....................................................................................................................... 3 5.0 WETLAND FUNCTIONS.............................................................................................................. 4 5.1 Biologic Functions.............................................................................................................. 4 5.2 Hydrologic Functions......................................................................................................... 4 6.0 WETLAND REGULATIONS........................................................................................................ 5 7.0 CONCLUSIONS............................................................................................................................. 5 8.0 CLOSURE....................................................................................................................................... 5 9.0 REFERENCES................................................................................................................................ 6 LIST OF TABLES TABLE 1 Vegetation Species Identified on the Site LIST OF FIGURES FIGURE 1 Vicinity Map FIGURE 2 Site Map FIGURE 3 USGS National Map FIGURE 4 King County Soil Survey Map FIGURE 5 King County Map LIST OF APPENDICES APPENDIX A Wetland Delineation Methodology APPENDIX B Definition of Plant Indicator Status and Data Forms 11418.009.doc [TRH/din] LO INTRODUCTION Barghausen Consulting Engineers, Inc., has completed a wetland delineation on the Wehrman property, located in Section 33, Township 23 North, Range 5 East, Willamette Meridian, in King County, Washington (Figure 1). This work was performed to assist in site planning related to proposed future site development. ' 1.1 Scope of Services I IL The scope of work for this study was limited to the following tasks: A review of documents readily available, including wetland inventory maps, U.S. Fish and Wildlife Service National Wetland inventory Maps, the Soil Survey of the King County Area, and the WRIA Subbasin Maps. A visual assessment to observe existing site conditions and to identify wetlands and streams located on or within 100 feet of the subject parcel. Methods defined in the Washington State Wetland Identification and Delineation Manual (1997), a manual consistent with the U.S. Army Corps of Engineers Wetland Delineation Manual (1987), were used to determine the presence and extent of wetlands on the site (Appendix A). • Review federal, state, and local regulations pertaining to the wetlands identified on the site. The review was used to classify the on -site wetlands. • An assessment of on -site wetland functions and values. • A report documenting the process, findings, and conclusions for this project. 1.2 Site Location and Description The site is comprised of three parcels located in King County, Washington (Section 33, Township 23 North, Range 5 East, Willamette Meridian). The site is undeveloped, forested for the most part, has power lines across the eastern portion of the site and contains a shrub -scrub, emergent wetland on the site in the power line easement that is routinely maintained by cutting trees and brush. The site is bounded on the north by forest and the power line easement, on the south by forest and residential neighborhood, on the east by a power line easement, Soos Creek and a forested, scrub -shrub, emergent, open water wetland system, and on the west by a residential neighborhood. 2.0 DOCUMENT REVIEW A review of readily available documents was conducted to characterize the site and surrounding area. 2.1 U.S.G.S National Map The U.S.G.S. National Map of the local area (2004) maps freshwater forested, shrub - scrub and emergent wetland on the east boundary of the site and east of the site (Figure 3). - 1 - 11418.009.doe 1TRD/dml r2.2 Soil Survey of King County Area, Washington TO DO YET The Soil Survey of King County Area, Washington (Snyder et. al, 1973) was reviewed to ' determine the general nature of soils on the subject site. The site is mapped as containing Alderwood and Norma soils (Figure 4). The Alderwood soil series is located on the majority of the site. The Alderwood series is made up of moderately well drained soils that formed on till plains. In a representative profile, the surface layer is a very dark grayish brown gravelly sandy loam about 7 inches ' thick. The upper part of the subsoil is dark yellowish brown and dark brown very gravelly sandy loam about 23 inches thick. The lower part is olive brown very gravelly sandy loam. Permeability of this soil is moderately rapid and a seasonal perched water table is at a depth of 18 to 36 inches from January through March. As part of the mapping of the Alderwood series, the survey has included small areas of McKenna, Norma, Everett, Indianola, Ranger, and Terric Medisaprists soils. The Alderwood soil series and its inclusions (except the Norma inclusion) are not listed by the Natural Resource Conservation Service (1995) as a hydric (wetland) soil. The Norma soil series is located along the eastern boundary of the site. The Norma series is made up of poorly drained soils that formed in alluvium, under sedges, grasses, conifers, and hardwoods. In a representative profile, the surface layer is black sandy loam about 10 inches thick. The subsoil is dark grayish brown and dark gray sandy loam about 50 inches thick. Permeability of this soil is moderately rapid and a seasonal water table is ' at or near the surface. The Norma soil series are listed by the Natural Resource Conservation Service (1995) as a hydric (wetland) soil. ' 2.3 King County iMap In the King County iMap system for sensitive areas and the 2002 aerial photograph overlay, the site is depicted as containing forested slopes. The map also indicates a large ' wetland system that includes Soos Creek and a Wildlife Network Corridor east of the site (Figure 5). ' 2.4 Washington Streams and Salmon Utilization Catalog Review A Catalog of Washington Streams and Salmon Utilization: Volume 1, Puget Sound Region (Williams et al., 1975) maps the site as being in the Soos Creek Drainage in the Duwamish-Green River Basin. Soos Creek is shown to be located east of the site. Soos Creek is used by Chinook, Coho and Chum salmon. ' 3.0 SITE RECONNAISSANCE 3.1 Site Conditions During Site Visit Theresa R. Dusek of Barghausen Consulting Engineers visited the subject site on October 27, 2004. The site visits included a visual observation of the subject site and surrounding ' area. Vegetation, soils, and hydrologic conditions on the site appear to be stable. Overall the site contains one wetland in the eastern portion of the site and off site to the east. A culvert that drains water from SE 188th Street into an open half pipe and into an 18-inch culvert is located in the northwest corner of the site. Water from this pipe enters a ditch located north of the site. E 1 - 2 - 11418.009.doc [TRD/dm] 3.2 Topography Based on topographic data provided on the Barghausen Consulting Engineers, Inc., 2004, Boundary and Topographic Survey, the site elevations range from approximately 462 feet in the western portion of the site to 376 feet along the eastern site boundary. Overall topographic relief on the site slopes toward the east into the wetland. The wetland slopes ' very slightly to the south. 3.3 Fauna ' Squirrels, flickers, Steller's Jays, several species of songbirds, have been observed on the site. Evidence of various animal species on the site has also been noted. Mole mounds and rodent holes were observed throughout the site. No plant or animal species listed ' federally or by the state as threatened or endangered have been observed on the site. Soos Creek located east of the site contains salmon and trout. ' 3.4 Vegetation Four representative data points were established to document plant species and dominance of vegetation on the subject property (Figure 2). The vegetative species composition varied from a mixed evergreen -deciduous forest over most of the site to blackberry thickets to shrub vegetation in the power line easement to a shrub and emergent wetland. Data forms detailing observations for vegetation are included in Appendix B and Table 1. 3.5 Soils During the site evaluation, soil conditions (including color, texture, and relative moisture content) were observed and recorded at four data points on the project site. The indicators used to identify hydric soils can be found in Appendix A. Soil types observed ' on the site ranged from silt loam to gravelly sandy loam. Field sheets detailing observations for soils are included in Appendix B. ' 3.6 Hydrology Hydrologic conditions, including saturated and inundated soils, as well as indicators of ' wetland hydrology as defined by the 1987 and 1997 manuals, were observed at one of the four data points (Appendix B). Generally, the on -site wetland contained saturated soils near the surface (within 12 inches) and inundation up to three inches deep during a second site visit on December 6, 2004. The upland portions of the site did not contain ' saturated or inundated soils. A culvert that drains water from SE 188th Street into an open half pipe and into an 18-inch culvert is located in the northwest corner of the site. Water from this pipe enters a ditch excavated in upland soil located north of the site. IWater on the site is from local runoff and shallow groundwater. 4.0 WETLAND AREAS ' Based on the use of the triple -parameter approach defined within the 1987 and 1997 manuals, a wetland is identified on the eastern boundary of the site. The wetland is a Palustrine scrub -shrub, emergent system on the site, and a Palustrine forested, scrub -shrub, emergent, open water system off -site. Vegetation species were identified and classified with a Wetland Indicator Status (WIS), soil conditions were identified and labeled, and observations of hydrologic conditions were made at four data points on the site. Shallow test pits were excavated in other portions of the site but 1 found to be similar to the representative data plots included in this report. The wetland was 1 - 3 - 11418.009.doc [TAD/dm] classified as such because all three wetland parameters were present. The wetlands are located in the Soos Creek Drainage in the Duwamish River Basin in WRIA 9. The on -site portion of the wetland is a Palustrine scrub -shrub, emergent seasonally flooded to saturated system located in the power line easement. In the power line easement trees are routinely cut and shrub vegetation is mowed. The wetland extends off -site to the east and is ' associated with Soos Creek. The portion of Soos Creek that is nearest to the site was flagged and surveyed and determined to be approximately 25 feet northeast of the site. The wetland on and off of the site contains saturated soils near the surface (within 12 inches) and up to one foot of inundation as you get closer to the open water portion of Soos Creek. Other open water areas may be present in the off -site wetland but were not directly observed during the site visits. The wetland boundary on -site is well defined topographically and via soil types and hydrologic regimes. The wetland contains Norma soils and the upland contains sloping Alderwood gravelly sandy loam soils. The on -site portion of the wetland was dominated by red osier dogwood, Douglas spiraea and willow in the shrub community and soft rush and grasses in the emergent portions of the on -site wetland. Off -site the wetland also contained sedges, rushes, buttercups ' and reed canarygrass in the emergent plant community as well as the same type shrub communities found on the site. The off -site portions of the wetland were dominated by willow and cottonwood. The on -site upland boundary contained blackberry thickets with minor 1 components of red osier dogwood, hazelnut, salal, and sword fern. 5.0 WETLAND FUNCTIONS The general biologic and hydrologic functions of the wetland are described below. 5.1 Biologic Functions The wetland has high biologic functions. The general on- and off -site wetland habitat contains forested, shrub, emergent, and permanent opened water habitats. The wetland is associated with Soos Creek and a mapped wildlife network corridor along stream channel. Waterfowl, including mallards and geese, have been observed using the wetland. The wetland does contain downed logs and snags that provide habitat for a wide variety of wildlife. Birds including waterfowl, mammals, and reptiles most likely use the wetland. Salmon species use Soos Creek. The wetland and creek are fairly large for an urban area and have buffers containing forest, residential development, parks, and schools. Vegetation and hydrologic conditions provide a variety of habitat conditions that provide food and cover for many wildlife species throughout the different stages of their lifecycle. 5.2 Hydrologic Functions In general, the wetland has moderate to high hydrologic functions. The wetland is hydrologically connected to up and down stream wetlands and ultimately Soos Creek. The wetland contains saturated soils, inundated soils, and opened water. A culvert that crosses under SE 192nd Street does restrict flows out of the wetland system during large rainfall and flood events. The wetland is large and can store stormwater runoff and discharge it to downstream systems providing nutrients. The outlet of the wetland allows surface water to be stored in the wetland, which may attenuate downstream flooding. The year-round saturated soil conditions and large size of the wetland in an urban setting may allow groundwater recharge to occur in the local area. Trees and shrubs within the wetland do have the ability to slow the velocity of floodwaters during larger flood events. Since the wetland does receive local runoff from sources such as the internal residential roads and yards and the wetland structure includes woody and herbaceous vegetation, the Iwetland does provide water purification functions. 1 - 4 - 1141 B.Oo9.doc [TRD/dml r6.0 WETLAND REGULATIONS Based on the information derived through site reconnaissance and readily available documents, two wetlands were identified on the site. The on -site portion of the wetland is a Palustrine scrub shrub, emergent, seasonally flooded to saturated system. King County wetlands in the King County Municipal Code (KKC), Chapter 21A.24, Environmentally Sensitive Areas. According to the KCC the wetland is classified as Class 1 Wetland requiring 100-foot buffer and Soos Creek is Classified as a Class 2S stream requiring a 100-foot buffer. In addition, a 15-foot building setback is required from the outer edge of the wetland and stream buffers. Agencies with jurisdiction over wetlands identified on this site include the King County, the U.S. Army Corps of Engineers, and the Washington State Department of Ecology. In addition, King County has adopted a new code that will be implemented in January 2005 that ' regulates wetland and stream systems. This new code will modify the buffers associated with the wetland and stream system if your application is not vested in the current code. 7.0 CONCLUSIONS Based on the 1987 and 1997 manuals, vegetation, soils, and hydrologic conditions necessary for an area to be considered a wetland were found on the site. The wetland is a Class 1 Wetland requiring 100-foot buffers. Soos Creek a Class 2S Stream requires a 100-foot buffer. 8.0 CLOSURE I 1 The findings and conclusions documented in this report have been prepared for specific application to this site. They have been developed in a manner consistent with that level of care and skill normally exercised by members of the environmental science profession currently practicing under similar conditions in the area. Our work was also performed in accordance with the terms and conditions set forth in our proposal. The conclusions and recommendations presented in this report are professional opinions based on an interpretation of information currently available to us and are made within the operation scope, budget, and schedule of this project. No warranty, expressed or implied, is made. Wetland boundaries identified by Barghausen Consulting Engineers, Inc., are considered preliminary until the flagged wetland boundaries are validated by the U.S. Army Corps of Engineers and/or the local jurisdictional agency. Validation of the wetland boundaries by the regulating agency(ies) provides a certification, usually written, that the wetland boundaries verified are the boundaries that will be regulated by the agency(ies) until a specific date or until the regulations are modified. Only the regulating agency(ies) can provide this certification. Since wetlands are dynamic communities affected by both natural and human activities, changes in wetland boundaries may be expected; therefore, wetland delineations cannot remain valid for an indefinite period of time. The U.S. Army Corps of Engineers typically recognizes the validity of wetland delineations for a period of 5 years after completion of a wetland delineation report. Development activities on a site 5 years after the completion of this wetland delineation report may require revision of the wetland delineation. In addition, changes in government codes, regulations, or laws may occur. Because of such changes, our observations and conclusions applicable to this site may need to be revised wholly or in part. 2/Jw��c)..CC, Theresa R. Dusek Natural Resource Ecologist 1 -5 - 11418.009.doe [TRD/dm] 9.0 REFERENCES Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRue. 1979. Classification of Wetlands and Deepwater Habitats of the United States. U.S. Fish and Wildlife Service Publication FSW/OSB-79/31. Environmental Laboratory. 1987. U.S. Army Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1, U.S. Army Waterways Experiment Station. Vicksburg, Mississippi. rFederal Register. 1994. Changes in Hydric Soils of the United States. Washington, D.C. Hitchcock, C. and Cronquist, Arthur. 1990. Flora of the Pacific Northwest. University of Washington Press. Seattle, Washington. King County Sensitive Areas Code, Chapter 21A.24. Various dates. Munsell Soil Color Chart. 2000. Munsell Soil Color Charts. Gretag Macbeth, New Windsor, New York. United States Department of Agriculture, Natural Resource Conservation Service (NRCS). 1998. Field Indicators of Hydric Soils in the United States, Version 4.0, Hurt, G.W., P.M. Whited, and R.F. Pringle (eds.). USDA, NRCS, Ft, Worth, TX. United States Department of Agriculture, Natural Resources Conservation Service (NRCS). 1995. Hydric Soils of Washington. 19 pp. United States Department of Interior, U.S. Fish and Wildlife Service (USFWS). 1997. National List of Vascular Plant Species that Occur in Wetlands: 1996 National Summary. A draft revision of: Reed, P.B., Jr. 1988. National List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service Biological Report SS (26.9). Washington, D.C. United States Geological Service. 2004. The National Map of the Kent Area, Washington. Reston, Virginia. Vepraskas, M.J. 1999. Redoximorphic Features for Identifying Aquic Conditions. Technical Bulletin 301. North Carolina Agricultural Research Service. North Carolina State University. Raleigh, North Carolina. I Washington State Department of Ecology. 1997. Washington State Wetland Identification and Delineation Manual. Washington State Department of Ecology, Publication No. 96-94. Williams, R.W.; R.M. Laramie, J.J. James. 1975. A Catalog of Washington Streams and Salmon Utilization: Volume 1, Puget Sound Region. Washington State Department of Fisheries, Olympia, Washington. 1 1 - 6 - 11418,009.doe [TRD/dml 11 TABLE 1 VEGETATION SPECIES IDENTIFIED ON SITE TREES Douglas Fir Pseudotsuga menziesii Red Alder Alnus rubra Scouler Willow Salix scouleriana SHRUBS Dewberry Rubus ursinus Evergreen Blackberry Rubus laciniatus Hardhack Spireae douglasii Himalayan Blackberry Rubus discolor Indian Plum Oemleria cerasiformis Red -Osier Dogwood Cornus stolonifera Redtop Bentgrass Agrostis alba Salmonberry Rubus spectabilis Scot's Broom Cytisus scoparius Sword Fern Polystichum munitum HERBS Bedstraw Galium tri orum Bentgrass Agrostis spp. Bittersweet Nightshade Solanum dulcamara Bracken Fern Pteridium aquilinum Buttercup Ranunculus repens Canadian Thistle Cirsium arvense Candyflower Calyptridium roseum Common Horsetail Equisetum arvense Common Plantain Plantago major Curly Dock Rumex crispus Dandelion Taraxacum officinale Fireweed Epilobium angustifolium Foxglove Digitalis purpurea Giant Horsetail Equisetum telmatia Lanceleaf Plantain Plantago lanceolata Large -Leaved Avens Geum macrophyllum Meadow Fescue Festuca pratensis Mullein Verbascum thapsus Orchard Grass Dactylis glomerata Oxeye Daisy Chrysanthemum leucanthemum Pacific Bleeding heart Dicentra formosa 11 Pearly Everlasting Anaphalis margaritacea Quack Grass Agropyron repens Reed Canarygrass Phalaris arundinacea Red Clover Trifolium pratense Sedge Carex spp. Soft Rush Juncus effusus Stinging Nettle Urtica dioica Velvet Grass Holcus lanatus White Clover Trifolium repens Youth -on -Age Tolmiea menziesii Note: This listing represents the major plant species identified. There may be other species present on within the subject site that are not listed. REFERENCE: Thomas Guide (2005) Scale: Horizonlal N.T.S. CsVAAO n S U r ` FNC ENGI Ng'V. P111 [7fN]c179d?RlarhihiilT T49 Verficai: N/A 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRCNMENTAL SERVICES WEHRMAN PROPERTY KING COUNTY, WASHINGTON Title: VICINITY MAP Job Number 11418 FIG. 1 DATE: 12/10/04 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ?U PUBFX r 4i l` REFERENCE: United States Geological Survey (2004) Wetlands . Freshwater Forested/Shrub wetland Freshwater Emergent wetland Freshwater pond Estuarine and Marine wedand ■ Riverine . Lake . Estuarine and Marine Dee pwater Other Freshwater w eedand Scale: Job Number Horizontal., N.T.S. Vertical: N/A WEHRMAN PROPERTY 11418 �HA4L,� 18215 72ND AVENUE SOUTH KING COUNTY, WASHINGTON A444 yr, 1, KENT, WA98032 �?Z, (425) 251-6222 Tf ff : S (425) 251 8782 U.S.G.S. NATIONAL FIG. 3 V1 �9. CIVIL ENGINEERING, LAND PLANNING, MAP T�A'G g„ptN�� SURVEYING, ENVIRONMENTAL SERVICES A DATE: 12r1 oro4 32 j.,.�.' _ sue, , • jrr 3j. SITE v, _ _ 1 _ ._j • � . ' r rnf Y -�I._�, � - it . j 3 - _ I REFERENCE: Snyder et. al (1973) LEGEND: No = Norma sandy loam AgD=Alderwood gravelly sandy loam, 15-30% slopes ' AgB = Alderwood gravelly sandy loam, 0-6°/o slopes Scale: For; Job Number Horizontal: N.T.S. Vertical NIA WEHRMAN PROPERTY 11418 ' ¢C,14A(/� 18215 72ND AVENUE SOUTH KING COUNTY, WASHINGTON - 11' KENT, WA 98032 mr 1 Z (425) 251-6222 rive: ' I4 (425) 251-5782 KING COUNTY FIG. 4 U pg CIVI1- ENGINEERING, LAND PLANNING, SOIL SURVEY MAP Cr'Hc RN�i"k� SURVEYING, ENVIRONMENTAL SERVICES ❑ATE"' 17/10104 1 P:01000s4114184exhibitIWB f4.cdr I I I I I I I I I I I I I I I I I I Val a 4 r. I;TA 177"4 7. vult r 111: L _,-�X 6 rZ yjAlr; . . . . . . . .... W" viol Lw _uw A� -71 w.k CL 4. Fl - t 1 .74 it ,-A' T. 112-1 j44, I,-' �i is '�]' a ';;!jr, L 4 'A� ft- K ima \I t� Pt DIEM ow. U, e A -it r t. M W ff I'l A -114 1 AS — All 4 .41; E!, SDI :Kli i REFERENCE: King County (2003) /I/ F I] A Fl I Uil-I 4V f-or Job Number Horizontal: MTS. Vertical: MIA WEHRMAN PROPERTY 11418 C, 14 A (I KING COUNTY, WASHINGTON 4q- %sl 18215 72ND AVENUE SOUTH FIG. 5 T' 0 KENT, WA 98032 Z (425) 251-6222 Title:�`f a 251-8782 KING COUNTY MAP CIVIL ENGINEERINQ LAND PLANNING, T' *, V JQATE: SURVEY Na ENVIRONMENTAL SERVICES 12110/041 I 1 11 1 1 ' APPENDIX A WETLAND DELINEATION METHODOLOGY n 1 1 i� fl APPENDIX A WETLAND DELINEATION METHODOLOGY The triple parameter approach of the Washington State Wetland Identification and Delineation Manual (1997) and the U.S. Army Corps of Engineers Wetland Delineation Manual (1987) was used to delineate the extent of wetlands on the site. Under this methodology, vegetation, soils, and hydrology are each evaluated to determine the presence or absence of wetlands. Based on the use of this method, an area is considered to be a wetland if each of the following are met: (1) dominant hydrophytic vegetation is present in the area, (2) the soils in the area are hydric, and (3) the necessary hydrologic conditions within the area are met. The Routine On -Site Determination Method was used for the evaluation of triple parameter criteria for this project. This methodology was selected because differences in vegetation types were easily observed, aiding in the identification of areas likely to meet the hydrology and soils criteria of this approach. Wetland boundaries were determined by conducting a walking inspection of the property. As part of this 1 inspection, species of vegetation, soil conditions, and hydrologic conditions were noted at several data plots to more accurately determine the boundaries of on -site wetlands. ' Wetland Vegetation Hydrophytic plants are plants specially adapted for saturated and/or anaerobic conditions. The U.S. Army ' Corps of Engineers and the U.S. Fish and Wildlife Service has assigned an indicator status to many plant species that is based upon the estimated probability of the species existing under wetland conditions. Plants are categorized as Obligate (OBL), Facultative Wetland (FACW), Facultative (FAC), Facultative ' Upland (FACU), and Upland (UPL). Species with an indicator status of OBL, FACW, or FAC are considered to be adapted to saturated and/or anaerobic (i.e., wetland) conditions and are referred to as hydrophytic vegetation (Appendix B). fl Trees and shrubs within a 30-foot radius and herbs within a 5-foot radius of each data point were identified and noted. The approximate percentage of cover for each of the different plant species occurring within the tree, shrub, and herb strata was determined. Dominant plant species are considered to be those that, when cumulatively totaled in descending order of abundance, exceed 50 percent of the area cover for each vegetative stratum. Any additional species individually representing 20 percent or greater of the total areal cover for each vegetative stratum are also considered dominant. The indicator status of the dominant plant species within each of the vegetative strata are used to determine the presence of hydrophytic vegetation near each data plot. A data plot was considered to have hydrophytic vegetation if greater than 50 percent of the dominant plant species within the area had an indicator status of OBL, FACW, or FAC. Hydric Soils Hydric soils are defined as those soils which are saturated, flooded, or ponded long enough during the growing season to develop anaerobic conditions that favor the growth and regeneration of hydrophytic vegetation. As a result of anaerobic conditions, hydric soils exhibit characteristics directly observable in the field, including high organic matter content, greenish or bluish grey color (gley formation), accumula- tion of sulfidic material, spots of orange or yellow color (mottling), and dark soil colors (low chromas). Throughout a large portion of the area delineated as wetland, identification of hydric soils was aided through observation of surface hydrologic characteristics and indicators of wetland hydrology (i.e., drainage patterns). The areal extent of hydric soils was defined through direct soil observation within A-1 t 1418.009.doc r FRD/dm] LI n II 1 1 several data plots placed both inside and outside the wetland. Soil observations were completed within soil data plots dug with a shovel to a depth of at least 16 inches below the existing ground surface. Soil samples were examined for the presence of hydric indicators. Soil organic content was estimated visually and textually. The presence of sulfidic material was determined by the presence of sulfide gases (i.e., a "rotten egg" odor). Soil colors were recorded after being determined through use of the three aspects of color in the Munsell Soil Color Chart: hue, value, and chroma (e.g., a soil designated as 1QYR 612 has a hue of 10YR, a value of 6, a chroma of 2, and a soil color name of light brownish gray). A soil chroma of two in combination with soil mottling or a soil chroma of one without soil mottling typically indicates a hydric soil. Wetland Hydrology Hydrologic conditions identifying wetland characteristics occur during those periods when the soils are inundated permanently or periodically, or the soil is continuously saturated to the surface for sufficient duration to develop hydric soils and support vegetation typically adapted for life in periodically anaerobic conditions. Research has indicated that the duration of soil saturation and inundation during the growing season is more influential on the plant community than the frequency of soil saturation and inundation during the growing season. For the purposes of this wetland delineation, the wetland hydrology criterion was considered to be satisfied if it appeared that wetland hydrology was present for at least S to 12 percent (12 to 29 days) of the growing season. The growing season begins when the soil reaches a temperature of 41 degrees Fahrenheit in the zone of root penetration. The hydrology was evaluated by direct visual observation of surface inundation or soil saturation within 16 inches below the existing ground surface in data plots. According the 1987 Manual, 'for soil saturation to impact vegetation, it must occur within a major portion of the root zone (usually within 12 inches of the surface) of the prevalent vegetation. " Therefore, if saturated soils or indicators were observed within 12 inches of the surface, positive indicators of wetland hydrology were noted. The area near each data plot was also examined for indicators of wetland hydrology. These indicators include dried water marks, drift lines, sediment deposits, and drainage patterns. It was not possible to observe conditions during the entire growing season. Areas where several positive indicators of hydrology were noted were assumed to contain wetland hydrology. A-2 11418,009.doc RRWdm] ' APPENDIX B DEFINITION OF PLANT INDICATOR ' STATUS AND FIELD DATA FORMS 77 1 u n APPENDIX B DEFINITION OF PLANT INDICATOR STATUS AND DATA FORMS Indicator Category Definitions OBL Obligate Wetland. Occurs almost always (estimated probability > 99 percent) under natural conditions in wetlands. FACW Facultative Wetland. Usually occurs in wetlands (estimated probability 67 to 99 percent), but occasionally found in uplands. FAC Facultative. Equally likely to occur in wetlands or uplands (estimated probability 34 to 66 percent). FACU Facultative Upland. Usually occurs in uplands (estimated probability 67 to 99 percent), but is occasionally found in wetlands (estimated probability 1 to 33 percent). UPL Obligate Upland. Occurs in wetlands in other regions (as deigned in the National List of Scientific Plant Names), but occurs almost always (estimated probability > 99 percent) under natural conditions in uplands in the region specified. NI No Indicator. These species have not been given an indicator status. They are assumed to be upland. Source: National List of Plants That Occur In Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service Biological Report 88 (26.9). 89 pp. B-1 11418.009.doc rM/dm Data Point: __L� of 5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 DATA FORM WETLAND DETERMINATION Project/Site: Wehrman Applicant/Owner: TLD Investigator: Theresa Dusek Job #: 11418 Have vegetation, soils, or hydrology been disturbed: Yes ❑ No C-' Is the area a potential Problem Area: Yes ❑ No B' VEGETATION Date: October 27, 2004 City: '~`- County: King State: Washington Dominant Plant Species Stratum % Cover Indicator 1. Corr,kc, S+.taM�-(P-fd_ 5k ?a 6cu) r2• �aK I � +��0. sl�tlicxw► Sh 3c7 VACLt 3. SP: rv�a� do„��IaS�,' Sk 15 F14cUJ 4• Ru u ; 4 'fc� l "K 5 Iti Lq o Fit c u- 5• 6. 7. 8, 14. Percent of Dominant Species that are OBL, FACW or FAC (except FAC- . *-Dominantspecies. '33 7c Cowardin Classification: A) 0 n -- WC-J-) uL rl Remarks: HYDROLOGY X Recorded Data (Describe in Remarks): — Stream, Lake, or Tide Gage X Aerial Photograph _ Other - _ No Recorded Data Available Wetland Hydrology Indicators jV p yt�- Inundated Saturated in Upper 12 Inches Water Marks Water Lines Sediment Deposits Field Observations: /J p vL-t- Drainage Patterns in Wetlands Oxidized Root Channels in Upper Depth of Surface Water: (in.) 12 Inches Depth to Free Water in Pit: (in.) Water -Stained Leaves Depth to Saturated Soil: (in.) Local Soil Survey Data Other lain in Remarks "f6.1VtJ' t Remarks: � � Qo: YL � o r< c� i Q� �Ga b o �. J- S A'' O� w�1anA eAy 2-99/DATA.FRNVrRH-trfi AF.787.wpd Data Point: I of —57 1 1 1 1 1 1 1 Map Unit Name: A l A e r u�a o A Taxonomy (Subgroup): Drainage CIass: Mos uJel I A tom+ Kt�_ Field Observations Confirm Mapped Type? Yes 9-No 11 Proiect Description: Depth. Matrix Color Mottle Colors Mottle Texture, Concretions, inches (Munsell Moist) (Munsell Moist) Abundance/Contrast Rhizowheres, etc. e 1 o `{ 2 Z f 2 �c ro�u e i, u 5 rt c1 6&nl y v�xveli Sind 00' �a-�B Foyle �{r3 �`� a1t�► SAn a.���m Hydric Soil Indicators: rl 0 M_t _ Histosol Histic Epipedon Sulfidic Odor Probable Aquic Moisture Regime Reducing Conditions Gleyed or Low-Chroma Colors Remarks: WETLAND DETERNUNATION Concretions High Organic Content in Surface Layer Organic Streaking Listed on Local Hydric Soils List Listed on National Hydric Soils List Other (Explain in Remarks) Hydrophytic Vegetation Present? Yes 0 No I' Hydric Soils Present? Yes 0 No C]-- Is this Data Point Within a Wetland? Yes 0 No Wetland Hydrology Present? Yes 11 No Remarks: 2-99/DATA.FRMfM-trh AF.787.wpd Data Point: �2, of 5 DATA FORM WETLAND DETERMINATION Project/Site: Wehrrnan Date: October 27, 2004 Applicant/Owner: TLD City: Investigator: Theresa Dusek Job 4: 11418 Have vegetation, soils, or hydrology been disturbed: Yes ❑ No [- County: Kind Is the area a potential Problem Area: Yes ❑ No Lf� State: Washington If needed explain on EMMUII. VEGF.TATtON Dominant Plant Species Stratum % Cover Indicator 1. RubuS Fr4Cu 2. u5 i 1+olo-{cr S' VL ..� Lq Q 14C1�j 3. 5 a X snta . ._ 5�_ 30 F14 C Lo 4. 5f� f�ea� �o4gEa�s�� .._ � �� Imo+ cU3 5. 6. 7. 9. 10. Percent of Dominant Species that are OBL, FACW or FAC (except FAC- . *-Dominants ecies. 0�%0 Cowardin CIassification:a_iu5'E� Remarks: am►n.. 'Yey +"ori hCJ_<' 0en Ynou.*t 0LR01@r-' t. �puser—I A At s bA-i- rto*F Accen+i 3 - ttp�e-kl_4-iCWI Aanv-c no HYDROLOGY X Recorded Data (Describe in Remarks): Stream, Lake, or Tide Gage X Aerial Photograph — Other No Recorded Data Available Wetland Hydrology Indicators Inundated YSaturated in Upper 12 Inches _ Water Marks _ Water Lines Sediment Deposits Field Observations: _ Drainage Patterns in Wetlands Oxidized Root Channels in Upper Depth of Surface Water: (in.) 12 Inches Depth to Free Water in Pit: (in.) Water -Stained Leaves Depth to Saturated Soil: (in.) _ vCocal Soil Survey Data Other (Explain in Remarks Remarks: 2-99/DATA.FRNVrRH-trh AF.787.wpd ri Data Point: Z of SOILS Map Unit Name: 0rr1l0�— Drainage Class: Voor- C�vct- 'U-4 Field Observations Taxonomy (Subgroup): I `�+?� n3 ` ,, t" p1 S Confirm Mapped Type? Yes 5-- No ❑ Project Description: Depth Matrix Color Mottle Colors inches (Munsell Moist) (Munsell Moist) Hydric Soil Indicators: _ Histosol _ Histic Epipedon _ Sulfidic Odor —Probable Aquic Moisture Regime +-' Reducing Conditions n-Gleyed or Law-Chroma Colors Remarks: WETLAND DETERMINATION Mottle Texture, Concretions, Abundance/Contrast Rhizosnheres, etc. �-- S' f t 1 a".nm mun 44ra Sux t A k t o c,, m _ Concretions _ High Organic Content in Surface Layer Organic Streaking -,' Listed on Local Hydric Soils List - Listed on National Hydric Soils List _ Other (Explain in Remarks) Hydrophyfc Vegetation Present? Yes C�7vo ❑ � Hydric Soils Present? Yes L1'No ❑ Is this Data Point Within a Wetland? Yes Er No ❑ Wetland Hydrology Present? Yes [YNo ❑ Remarks: 2-99/DATA.FRNVM-trh AF.787.wpd Data Point: �3 of 5 1 1 1 i 1 1 DATA FORM WETLAND DETERMINATION Project/Site. Wehrman Date: October 27, 2004 Applicant/Owner: TLD Investigator: Theresa Dusek Job #: 11418 City" Have vegetation, soils, or hydrology been disturbed: Yes ❑ No cr— County: King_ Lthe area a potential Problem Area: Yes ❑ No P--' State: Washin on If needed explain on reverse. VEGETATION Dominant Plant Species Stratum % Cover Indicator 1. C , ut vv1 a- r- 5 i1 G O 7a r A C tk*- 2. 0 � hks corn 29'2o FnC1L 3. Cor,n"'5 1 0 o% F'iC.(� 4. 5. 6. 7. S. 9. 10. Percent of Dominant Species that are OBL, FACW or FAC (except FAC- . *-Dominantspecies. JW 26 Cowardin Classification: Ne yk ` 4 Remarks: o nAer WASi-er-a foWeP- 14V%4- .4"a- o PPP -rs to �t o-r� ,Id f,C,Lj beJ dcc�SST'f{►L a `FrurtS,,ml iou^�orS, ile�Q1'14'�; ��o i!rt 1� `F'O Cam/ ��� � I��Ogr�P►liG�ll�� L2r- .�SSior� T-+'� 0.ftiEc� i.$ y-ite �C.7,'�UI��OL.�OU'.� w�iland elP,fe�tQ�, HYDROLOGY X Recorded Data (Describe in Remarks): ____ Stream, Lake, or Tide Gage X Aerial Photograph _ Other ` No Recorded Data Available Wetland Hydrology Indicators N o Inundated Saturated in Upper 12 Inches Water Marks Water Lines Sediment Deposits Drainage Pattems in' Wetlands Cield Observatimis: V Aiz� Oxidized Root Channels in Upper Depth of Surface Water: (in.) 12 Inches Depth to Free Water in Pit: (in.) Water -Stained Leaves Depth to Saturated Soil: (in.) Local Soil Survey Data Other (Explain in Remarks Remarks: 2-99JDATA,FRhVTRH-trh AF.787.wpd Data Point: 3 off 1 1 1 1 1 1 1 SOuLS Map Unit Name: A k rVoo 0 d Taxonomy (Subgroup): �- ` c 'D ,,k ne S Project Description: Depth Matrix Color Mottle Colors inches (Munsell Moist) (Munsell Moist) joy P- 3-1g io,�y/3 12 I r v w----- Hydric Soil Indicators: 0c) Histosol Histic Epipedon Sulfidic Odor Probable Aquic Moisture Regime Reducing Conditions Gleyed or Low-Chroma Colors Remarks: WETLAND DETERMINATION Drainage Class: MCI Oell 10'<kt Field Observations Confirm Mapped Type? Yes 2XNo ❑ Mottle Abundance/Contrast Texture, Concretions, Rhizospheres, etc. 5 ti4 1 C'PL rn1 a roue f u Son. Oat? Concretions High Organic Content in Surface Layer Organic Streaking Listed on Local Hydric Soils List Listed on National Hydric Soils List Other (Explain in Remarks) Hydrophytic Vegetation Present? Yes ❑ No CY Hydric Soils Present? Yes ❑ No l- Is this Data Point Within a Wetland? Yes ❑ No 0� Wetland HydrologyHyckolqgy Present? Yes ❑ No Remarks: 2-99/DATA.FRM/TRH-trh AF.787.wpd Data Point: � of 5 DATA FORM WETLAND DETERMINATION Project/Site: Wehrman Date: October 27, 2004 Applicant/Owner: TLD Investigator: Theresa Dusek Job #: 11418 City: Have vegetation, soils, or hydrology been disturbed: Yes ❑ No C" County: King_ Is the area a potential Problem Area: Yes ❑ No ©-` State: Washington VEGETATION Dominant Plant Species Stratum % Cover indicator 1. cL' r (n&_C.r--c:f IL-Lrn 7— 51) F7ACL(. 2. d e m 1 e r,' a- C 2 r- a`5 ; -Co r rn l= A r t+_ 3. �0.�dLr^, alAbci A a �to� a'L7 F14C lA� 4.u�as r?�`�'aMr`u5 5�O �NCVL 5. 6. 7. 8. 9, 10. Percent of Dominant Species that are OBL, FACW or FAC Kexccpt FAC-). *-Dominantspecies. S 7-a Cowardin Classification: o r4 ` w ,---R d n Remarks: o`I a�e�t }` es�en hal;�Q r�a�� �� en rs o r� �a w s d o 010 rn u. k e �'I a �t & �e. d 4-iov3 rn a hte_'-�ApLo roe ` 4L eas-t, _D Pd;l1 5 e fe a* -a b p I #W +k; a rrza - rye.0 some ree,A c�nar rtro�SS . HYDROLOGY X Recorded Data (Describe in Remarks): Wetland Hydrology Indicators AJ a11__kl _ _ Stream, Lake, or Tide Gage X Aerial Photograph Inundated _ Other Saturated in Upper 12 Inches No Recorded Data Available Water Marks Water Lines Sediment Deposits Field Observations: d V"O � Drainage Patterns in Wetlands Oxidized Root Channels in Upper Depth of Surface Water: (in.) 12 Inches Depth to Free Water in Pit: (in.) Water -Stained Leaves Depth to Saturated Soil: (in.) _ ` Local Soil Survey Data Other (Explain in Remarks) I Remarks: 2-99/DATA. FRNVTRH-trh AF.787.wpd Data Point: V of SOILS Map Unit Name: A- e� r Loeo Taxonomy (Subgroup): c rl ti t- A It rp C- � Py Project Description: Depth Matrix Color Mottle Colors inches (Munsell Moist) Munsell Moist 0-1 _ 10 kV I - 11f (64Rz/Z 19-16? fdYR Y/3 Hydric Soil Indicators: a Histosol Histic Epipedon Sulfidic Odor Probable Aquic Moisture Regime Reducing Conditions Gleyed or Low-Chroma Colors Remarks: WETLAND DETERMINATION Hydrophytic Vegetation Present? Hydric Soils Present? Wetland Hvdrolo2v Present? Remarks: Drainage Class: _P?oj UIFA I a lcl', A4 Field Observations Confirm Mapped Type? Yes IT"' No ❑ Mottle Abundance/Contrast Texture, Concretions, Rhizosyheres, etc. 51 1 `� eLT0 Sctrictct lye<M cri�ue..Ilu S��k Isar+ Concretions High Organic Content in Surface Layer Organic Streaking Listed on Local Hydric Soils List Listed on National Hydric Soils List Other (Explain in Remarks) Yes ❑ No i — Yes ❑ No Cr- Is this Data Point Within a Wetland? Yes ❑ No Yes ❑ No 2-99/DATA. FRN V IRH-trh AF.787.wpd Data Point: 5 of 5 DATA FORM WETLAND DETERMINATION Project/Site: Wehrman Date: October 27.2004 Applicant/Owner: TLD Investigator: Theresa Dusek Job #: 11418 City: Have vegetation, soils, or hydrology been disturbed: Yes ❑ No [� County. ICmg -- Is the area a potential Problem Area: Yes ❑ No Cam— State: Washingion If needed explain on reverse. VEGETATION Dominant Plant Species Stratum % Cover Indicator 1. A c r M L C r-o � k� l 1 Lty+n -r --- 5 c7 p Pr CLA, 2. a r-,j I ks Co rn u:i 0. 5 k' p rt r�- C Lk 3. (Z6vu5 'J"+ TC, S 5k- 20 ACk 4. 1 fro 5` , s s�, J4 2 a -tb ';VA Cu., 5. 6. 7. 8. 9. 10. Percent of Dominant Species that are OBL, FACW or FAC (except FAC- . *-Dominantspecies. 7e [)..5 Cowardin Classification: 1Q0 ri — Remarks: In e— kwn-1 5 iO `� a u) r CL U � n e n �a r `1-(^ � S a � {� r- 6L,-ni.usy , HYDROLOGY X Recorded Data (Describe in Remarks): Stream, Lake, or Tide Gage X Aerial Photograph _ Other No Recorded Data Available Field Observations: /J py Depth of Surface Water: (in.) Depth to Free Water in Pit: (in.) Depth to Saturated Soil: (in.) Remarks: Wetland Hydrology Indicators Inundated Saturated in Upper 12 Inches Water Marks Water Lines Sediment Deposits Drainage Patterns in Wetlands Oxidized Root Channels in Upper 12 Inches Water -Stained Leaves Local Soil Survey Data Other (Explain in Remarks) 2-99/DATA. FRbV1 RH-trh AF.787.wpd Data Point: 5 of S 1 1 1 1 1 1 SOILS Map Unit Name: h l- e lr oja o d - Taxonomy (Subgroup): Crk 4 i' c d o-r'o c k r-4'S - I Proiect Des criation: Depth Matrix Color Mottle Colors inches (Munsell Moist) MunselI Moist 2� 2 �-�- Drainage Class: M 4 el W+-1 1 j r. ""✓tc.94 Field Observations Confirm Mapped Type? Yes D-"�'No ❑ Mottle Abundance/Contrast Texture, Concretions, Rhizo heres etc. azs��i �� Sandy ioa.r'✓j Hydric Soil Indicators: P o Histosol _ Concretions Histic Epipedon High Organic Content in Surface Layer Sulfidic Odor Organic Streaking Probable Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes ❑ No Hydric Soils Present? Yes ❑ No 13-- Is this Data Point Within a Wetland? Yes ❑ No Fr — Wetland Hydrology Present? Yes ❑ No EL — Remarks: 2-99/DATA.FRMnRH-trh AF.787.wpd Plat Screening Transmittal, King County Preliminary Plat Application of Wehrman Department of Development LUSD File No. L04P0027 and Environmental Services Land Use Services Division Date of Information Request: October 6, 2006 900 Oakesdale Avenue Southwest Deadline for Submittal of Information: January 3, 2006 Renton, Washington 99055-1219 Please provide ten (10) copies of the following, unless otherwise noted. Drainage: The following information must be prepared and stamped by a civil engineer licensed in the State of Washington. • Please revise the level 1 off -site analysis to reflect the current proposal. The narratives and maps appear include parcels not included in the proposal boundaries. • Please address off -site upland flow to the site from the west. The level 1 analysis and subbasin maps should show the upstream flow. Note, we found flows from the west in the ditch on SE 1881h St., sheet flow from the west and concentrated flow from the southwest corner. Revise the conceptual drainage plan as needed to address the upstream flow. • Please show the 100-year floodplain for any streams andlor wetlands that affect the site. • Include site cross sections referenced on the preliminary site grading plan. • Revise the conceptual drainage plan to address frontage and off -site road improvements * Provide preliminary calculations to show the proposed sizing of all the detention facilities. t e\ - c!>e-1 t-t, s 1 -4-4P_ Roads/Traffic: • Provide a TIR for the Level -of -Service for the 188"M201h intersection • Provide entering and stopping sight distance(s) along frontage per 1993 KCRS. • Please provide the easement or right-of-way documents which demonstrate the legal authority to construct the off -site road improvements to the west. Letters of intent from affected property owner(s) is required if existing documentation does not exist • Include cross section details plan and profile (vertical alignment) of the off -site and frontage road improvement. Details of the proposed road fill and preliminary geotechnical recommendations is required. A property owner letter of intent for construction of the road fill is required • Provide an offsite road inventory and right-of-way evaluation to verify appropriate access to the site. Walkways: Provide an inventory map (i.e. existing conditions - widths, surface type, etc.) of the walking routes to the elementary, junior high/middle and high school and/or the appropriate bus stop location associated with each school. Identify any improvements necessary to provide safe walking conditions. Recreation Space: Submit a conceptual recreation plan which indicates the type of improvements (i.e. sport court, play structure, benches, landscaping, etc.) proposed within the recreation tract. See KCC 21A.14.180 E2 for equipment requirements Revised Preliminary Plat: Provide 25 copies of a revised preliminary plat, as necessary, as a result of above - referenced requests for additional information. Wehrman - L04P0027 10l05 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. Wehrman — LD4P0027 10105 � �- LQ 41 Kim Claussen King County Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue S.W. Renton, WA 98055-1219 RE: Wehrman Preliminary Plat King County File No. L04PPO Our Job No. 11418 Dear Kim: vo1!n1ZCC3!S =7=NG, SURVEYING, ENVIRONMENTAL SERVICES August 19, 2005 COURIER DELIVERY 2 AU6 t .,. OP ,ov'� KC, Pursuant to our meeting with you and Bruce Whitaker on July 20, 2005, regarding alternative access scenarios to the project referenced above, enclosed are 10 copies of an alternate access exhibit that shows that the Wehrman project can achieve access without needing a temporary or permanent construction or access easement from Tony Janda to the north. The original preliminary plat application was submitted identifying a temporary construction easement on the Janda property for construction of a public road extension of S.E. 188th Street. Please incorporate the enclosed plan sheet into the review documents. As you aware, this application was submitted on December 14, 2004, approximately eight months ago. If you have any questions regarding this matter or require additional information please contact me immediately. Respectfully, Z- RYA& Ivana Halvorsen Senior Planner IH/pj 11418c.016.doc enc: As Noted cc: Chris Austin, Trinity Land Development, L.L.G. (w/enc) Rob FlittorI Trinity Land Development, L.L.C. (w/enc) Daniel K. Balmelli, Barghausen Consulting Engineers, Inc. Ivana Halvorsen, Barghausen Consulting Engineers, Inc. 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX BRANCH OFFICES ♦ OLYMPIA. WA ♦ TEMECULA, CA ♦ WALNUT CREEK. CA b10 www.barghausen.com Wehrman L04P0027 Screening Comments Drainage: Bruce Whittaker 2/13/2005 Please revise the Level 1 Offsite Analysis to reflect the current proposal. The narratives and maps appear to include parcels not included in the proposal. Please address offsite upland flow to the site from the west. The Level 1 Analysis and subasin maps should show the upstream flow. Note that we found flows from the west in the ditch on SE 188"' St, sheet flow from the west and concentrated flow from the southwest corner. Revise the conceptual drainage plan as needed to address the upstream flow. Please show the 100-year floodplain for any streams or wetlands that affect the site. Include the site cross sections referenced on the preliminary site grading plan. Revise the conceptual drainage plan to address frontage and offsite road improvements. Provide preliminary calculations to show the proposed sizin of all the cetention facilities. N e.� � ='? "� � `' 'L 19gj L L e&^.s'V-,. C,. I -- ; )9=*- t 4P V-,% C Roads: 1:4 ��+ � t s(z=%,-�� p l S Q n D Please provide easement or R/W documents showing legal authority to construct the offsite road improvements to the west. A letter of intent from affected property owner(s) is required if existing documentation does not exist. CLA 3K Include cross section detailsho the offsite and frontage road improvements. Details of the proposed road fill and preliminary geotechnical recommendations are required. A property owner letter of intent for construction of the road fill is required. Provide an offsite road inventory and R/W evaluation to verify appropriate access to the site. 2-t'6-CS ck +�. �-�.,.-was �-�F-�'s�-� t,, l�►r„ � �,..�.� ���-�� LEVEL 1 OFF -SITE DRAINAGE ANALYSIS Proposed Wehrman Property Plat NWC — 124th Avenue S.E. and S.E. 192nd Street King County, Washington 1 Prepared for: L 1-:\J E ,� Trinity Land Development, L.L.C. 315 -- 39th Avenue S.W., Suite 6 Puyallup, Washington 98373 n December 2, 2004 C) E S 1\� C. �2 EFLE�_' T —1 H E Our Job No. 11418 C UZOP_?\�T t ;, �'\ L 0 0 64? CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX BRANCH OFFICES ♦ OLYMPIA, WA ♦ TEMECULA, CA ♦ WALNUT CREEK, CA www.barghausen.corn 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 TABLE OF CONTENTS TASK 1 STUDY AREA DEFINITION AND MAPS EXHIBIT A Vicinity Map EXHIBIT B Downstream Drainage Map EXHIBIT C Upstream Basin Map TASK 2 RESOURCE REVIEW EXHIBIT D FEMA Map EXHIBIT E Sensitive Areas Folios EXHIBIT F SCS Soils Map EXHIBIT G Assessor's Map EXHIBIT H Wetland Inventory Map EXHIBIT I Basin Reconnaissance Summary Report TASK 3 FIELD INSPECTION EXHIBIT J Off -Site Analysis Drainage System Table 3.1 Conveyance System Nuisance Problems (Type 1) 3.2 Severe Erosion Problems (Type 2) 3.3 Severe Flooding Problems (Type 3) TASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS EXHIBIT K Drainage Complaints TASK 5 MITIGATION OF EXISTING OR POTENTIAL PROBLEMS 1 f 418.008.doc [JPJltep] 11 ' TASK 1 STUDY AREA DEFINITION AND MAPS 1 u 1 TASK 1 STUDY AREA DEFINITION AND MAPS ' The proposed Wehrman property plat is approximately 14.96 acres located within a portion of the Southwest quarter of Section 33, Township 23 North, Range 5 East, Willamette Meridian, King County, Washington. More particularly, the site is located on the north side of S.E. 192nd Street and west of the ' 124th Avenue S.E. extension. The enclosed Exhibit A — Vicinity Map depicts the approximate location of the proposed site. The existing topography of the site has slopes ranging from 5 percent up to almost 40 percent. A Bonneville Power Administration (BPA) transmission easement lies on the eastern portion of the project site and then diagonally bisects the northeast corner of the project site. Soos Creek and a ' large wetland area lie approximately 200- to 300-feet east of the project site. The area immediately west of the project site consists of existing residential developments. The existing conditions of the project site are such that most of the site is forested or brushy, and there is a scattering of houses in the southern ' portion of the project site. The proposal for this development is to construct 68 lots with the northern 26 lots being accessed from S.E. 188th Street, and the remaining 42 lots to be constructed in the southern portion of the project site, which will be accessed from S.E. 192nd Street along an extension of 124th Avenue S.E. to the north. Drainage facilities are proposed to be constructed along the eastern property line of the site adjacent to the existing wetland buffer. Elevation difference across the site is approximately 100 feet vertical difference with elevations at the far west end of the site around 478, and elevations at the far east property line around ±376. UPSTREAM DRAINAGE ANALYSIS ' Based on the USGS quad map and our site visit, it appears that there is upstream flow onto and through the site. Portions of the area lying west of the project site sheetfiow through adjacent properties onto the project site. In addition, portions of the area west of the project site drain into S.E. 188th Street ditches ' where it is conveyed to the northwest corner of the project site, and then sheetflows through the property down a steep slope under existing conditions. The total upstream basin is approximately 38 acres. 1 I 11418.008.doc [JPJ/tep] F-1 EXHIBIT A Vicinity Map 1 1 I E 1 VICINITY MAP HA�0 S� TFi0MA5 GUIDE (USED ©Y PERMISSION) A& NORTH EXHIBIT B Downstream Drainage Map h n F 71 Ilu 1-1 1 11 EXHIBIT C Upstream Basin Map EXHIBIT C Upstream Basin Map I " r • • �� CO r • p • ' r ■ 4 • n • r ■ X ■ • / ++ S • 50 r � I i i O • i +12 f I r Ir r• �ti i � � i , • �� f� I Big ■ ---- ■ ■ r •` ■ ■ r ■ r • • a ■ ■ Ml ■ d. ■ I N_R r Ln • r ■ ■ ■• ■ ■ ' • * ■ • • ■ • oilw ■ �� 3 ■ • N • ■ ■ ■ o • C • ■ , ■ i � i i • ' r ■ ■ • I � e No ■ � No " • • ' • r ■ lfi • r " O •� • r I • I gar r ■ ■ •• ■ } „ I 1 S /■ TASK 2 RESOURCE REVIEW 11 1 1 TASK 2 RESOURCE REVIEW • Adopted Basin Plans: The site is part of the Soos Creek Basin. Finalized Drainage Studies: This is not applicable. • Basin Reconnaissance Summary Report: Once again, the site is located in the Soos Creek Basin. Part of the Soos Creek Basin Reconnaissance Summary Report is to construct a control weir at the bridge on S.E. Lake Young's Way. This project should be justified by a future basin plan. It is not known at this time if that weir is constructed; however, this weir is approximately 1 mile downstream from the proposed project site. • Critical Drainage Area Maps: According to the Water Quality applications map and the 1998 King County, Washington Surface Water Design Manual (KCSWDM), Basic Water Quality treatment is required. According to the flow control applications map, also in the KCSWDM, Level 2 Flow Control is required as a minimum. • Floodplain and Floodway FEMA Maps: Please see the enclosed Exhibit D — FEMA Map utilized for this analysis (Panel No. 991 of 1,725, Map No. 53033CO991 F, revised May 16, 1995). As indicated by this map, the proposed project site does not lie within a floodplain or floodway of a stream; however, Soos Creek lies 270 feet east of the project site and does have a floodplain associated with it. However, it does not encroach on the project site. • Other Off -Site Analysis Reports: A review of Exhibit I — Basin Reconnaissance Summary Report and a site investigation were conducted in preparation of this Level 1 Drainage Analysis. The United States Department of Agriculture Soils Conservation Service Map is also provided. See Exhibit F — SCS Soils Map. • Sensitive Areas Folios: Based on our review of the King County Sensitive Areas Map Folios, it was found the subject site does lie within a sensitive area, which is an erosion sensitive area. Also, a wetland is located immediately east of the project site, in addition to Soos Creek that is also a sensitive salmon -bearing stream. • Road Drainage Problems: This is not applicable. • United States Department of Agriculture King County Soils Survey: Based on the soils map for this area, the entire site is located within Alderwood type soils. • Wetland Inventory Maps: The Exhibit H — Wetland Inventory Map for this area is included herewith. Soos Creek is coursing through wetland along almost its entire downstream drainage course. However, immediately adjacent to the site, there is no mapped wetland as indicated by Exhibit H -- Wetland Inventory Map, even though there are wetlands existing there. • Migrating River Studies: This is not applicable. I11418.008.doc (Mitep) U 1 EXHIBIT D FEMA Map C" U C,00)� y O w �C" Q _� ��.. 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W' LU L.L V4 LU J H a X O cc d a Q 8 LO of _eo n ruaLt nUuIHrA`>1 0 m m m m m m= m m= m m m m r= r 1 EXHIBIT E Sensitive Areas Folios .. � __ .,,. a .� _ _ € _._. _ `./� a � t w w ■� >� � �£� � � «a2� -� � � _&� \ r IL�.Lr i t a 1 �J EXHIBIT F SCS Soils Map 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I III N ti t B t s.. . A4B- Sk 4A Ur _ CIr � AgC w'r -AmB •' - _ i - � z v• ❑.. �4 (Ir71 B e. I A S. 2 � NaI9� A AgC _�4 '�. � AgC`I - Ag9 � k Am6 ? AgC AgE3 + rnr e �O U. AgC 4 Tu r `' •.t . EvB Ev6 : Na AgC C a F. AmC'I I Ur (1kF Sk No AgH. u o AgB rSgC AgnC •EvNo- C Sk N Agc No SOILS MAP 1 NORTH I F EXHIBIT G Assessor's Map SE B6TH P. -00001- �n n� s s197sa026i 619780 332305-9039 w _ G 0260 = i (0.961w.) Qe � mrm, 197801 95197 0197 197 197 -oza1�_0280- 0286 W265 `_d284 i OD=- -0oDm. .00aoz. .uno0:- aooDz_ 619960 0100 .z 619780-0300 332305 619960 0-1 619960 0160 619960 9073 eta�sx, 1 � 0140 -00001- _ I -fit 619960-0130 -00001- a1 80 (4.03Ac.) BD npti, I � 8 etas 25 - -000D1- �3 _00001- - w.j!. , v.�l78019790,979960-01202d 0323, - °°°°�. SD32a, _t i a2. 1 i .-_ i —____,-_.-.._._._._._._._._._._.___._ - i ar01 &03,, 0205 �1029lx�,a9oo_ ° aa¢2 MOM x 0099 = am 9� r iR 619900 aria _ 0218 0060 ! &19040-0204 -0tOP.1- i neyn i E1BRl�x4 nrx,n et4S00-DO25 11 619900 3 2 ' 619540-0222 _ 8198"00 4d , i i fi199040026 619990-M21 619900 �/ 0 100 0 I70.m s 919640-0245 I 0059 /1 619840 6 -0aoo2- u 7 - 3 _ 0241 ' 61990MG40 n,°w 2- 4XXM- ¢ Mm olgE -0744 i et9MM42 ° 619900 0050 F%b15 i An.rry x 619900 1119840-0260 e,am E 819900-0041 _ i mmm nu�i n�mt nw:i 0080 H, { i � 7198008120 X 619940-0280 819900 619900 _ -00002 i i E °m819901}-0125 0126 -5 0127 to.x, � m� 619840-0300 ai n,a°, 619900 s nss.a, 619900 nm,m 619900 naa.n a1: 619900 s 1 E 9 1 11 -00002- al = 0141 0142 0186 1 0210 02 4 wan] i - nnul nsem, ; °.ar I 619 - 619840-0320 1 5 61s9D0 �19900-Q14 e' 619e00 � 0205 05 -ODW2- ; - 0140 - = 0185e- e i i se, n.o.TS Y• P4�1 n., r<5 I R.5.5,] I„�rl 4 81090082oa ! w. 0184 eta9w a10 a 3 619840 F 619840I ri 61990 0 C 0341 0340 60 3U2i5 i- 4XM2- -0002- I z— t s E fi19"8"00 a = 6199D0JS d180 4 0182 = o N 00i I i �V ASSESSOR'S MAP NORTH 1 1 EXHIBIT H Wetland Inventory Map 1 1 1 1 1 1 1 1 1 1 Black River Mile N 0 '/2 1 Lower Green River Louver Cedar River Middle Green River Jenkins Creek Covington Creek Soos Creek Green River Basin 1 Ll EXHIBIT I Basin Reconnaissance Summary Report fl 1 1 ' RECONNAISSANCE REPORT NO. SODS CREEK BASIN 7 JANUARY 1986 ' Natural Resources and Parks Division and Surface Water Management Division King County, Washington 7 1 r-, King County Fmecutive Tim Hill Mng County Council Audrey Gruger, District 1 Cynthia Sullivan, District 2 Bill Reams, District 3 Lois North, District 4 Ron Sims, District 5 Bruce Laing, District b Paul Barden, District 7 Bob Grieve, District 8 Gary Grant, District 9 Department of Public Works Don LaBelle, Director Surface Water Management Division Joseph J. 5immler, Division Manager Jim Kramer, Assistant Division Manager Dave Clark, Manager. River & Water Resource Section Larry Gibbons, Manager, Project Management and Design Section ' Contributing Staff Doug Chin, Sr. Engineer Randall Parsons. Sr. Engineer ' Andv Levesque, Sr. Engineer Bruce Barker, Engineer ' Arnv Stonkus, Engineer Rav Steiger, Engineer Pete Rim -en, Engineer IConsulting Staff ' Don Spencer. Associate Geologist, Earth Consultants. [nc. John Bethe[. Soil Scientist. Earth Consultants, [Lie. 1 nqIA Planning and Resources Joe Nagel, Director Natural Resources and Parks Division Russ Cahill, Division Manager Bill Jolly, Acting Division Manager Derek Poon, Chief. Resources Planning Section Bill Eckel. Manager, Basin Planning Program Contributing Staff Ray Heller. Project Manager & Team Leader Matthew Clark, Project Manager Robert R. Fuerstenberg, Biologist & Team Leader Matthew J. Bruengo. Geologist Lee Benda. Geologist Derek Booth. Geologist Dvanne Sheldon, Wetlands Biologist Cindy Baker, Earth Scientist Di Johnson. Planning Support Technician Robert Radek, Planning Support Technician Randal Bays. Planning Support Technician Fred Bender. Planning Support Technician Mark Hudson, Planning Support Technician Sharon Clausen. Planning Support Technician David Truax, Planning Support Technician Brian Vanderbur„ Planning Support Technician Carolvn M. Bverly, Technical Writer Susanna Hornig, Technical Writer Virginia Newman, Graphic Artist Marcia McNulty, Typesetter Mildred Miller, Typesetter Jaki Reed. Typesetter Lela Lira, Office Technician Martv Cox, Office Technician C1. ' P:CR TABLE OF CONTENTS 1. SUMMARY 1 II. INTRODUCTION 1 III. FINDINGS IN SOOS CREEK BASIN A. Overview B. Effects of Urbanization 3 C. Specific Problems 4 1. Bank failures 4 2. Channel erosion 4 3. Flooding and potential flooding 4. Stream habitat 4 IV. RECOMMENDATIONS 5 A. Inform appropriate governmental agencies of 5 the reconnaissance findings 13. Reevaluate specific surface water management 5 policies C. Prepare a comprehensive basin plan 6 D. Construct the capital improvement projects 6 E. Maintain or enhance instream and riparian habitats 6 V- MAP 7 APPENDICES. APPENDIX A. Estimated Costs A_1 APPENDIX 13: Capital Improvement Project Ranking B-1 APPENDIX C: Detailed Findings and Recommendations C_1 SUMMARY The Soos Creek Basin is located north and east of the Green River in King County. Whale the southern and eastern portions of the basin are rural, the remainder is a rapidly expanding suburban community. This development pattern has not caused serious environmental damage or flooding, however, due to highly pervious soils, an extensive network of streams and wetlands that provide natural storage for stormwater runoff, and the fact that development has only recently accelerated in this basin. Although the overall severity of problems in the Soos Creek Basin was not great at the time ' of reconnaissance, several significant problems were identified and should be addressed. These include bank failures, channel erosion, flooding in some locatioms, and poor stream habitat, Recommendations to address these problems include efforts to 1) inform appropriate agencies of the reconnaissance findings, 2) reevaluate specific policy issues regarding the management of surface water, 3) prepare a comprehensive basin plan, 4) construct the capital improvement projects evaluated with citizen advisory committee criteria, and 5) maintain or enhance habitat throughout the basin. II. INTRODUCTION: History and Goals of the Program In 1985 the King County Council approved funding for the Planning Division (now called the Natural Resources and Parks Division), in coordination with the Surface Water Management Division, to conduct a reconnaissance of 29 major drainage basins located in King County. The effort began with an initial investigation of three basins --Evans. Soos. and Hylebos Creeks -- in order to determine existing and potential surface water problems ' and to recommend action to mitigate and prevent these problems. These initial investigations used available data and new field observations to examine geology, hydrology, and habitat conditions in each basin. Findings from these three basins led the King County Council to adopt Resolution 6013 in April 1986. calling for reconnaissance to be completed on the remaining 26 basins_ The Basin Reconnaissance Program, which was subsequently established, is now an important element of surface water management. The goals of the program are to provide useful data with regard to 1) critical problems needing immediate solutions. 2) basin characteristics for use in the preparation of detailed basin management plans, and 3) capital costs associated with the early resolution of drainage problems. The reconnaissance reports are intended to provide an evaluation of present drainage ' conditions in the County in order to transmit information to policymakers to aid them in developing more detailed regulatory measures and specific capital improvement plans. They are not intended to ascribe in any conclusive manner the causes of drainage or erosion problems. instead, they are to be used as initial surveys from which choices for subsequent detailed engineering and other professional environmental analyses may be made. Due to the limited amount of time available for the field work in each basin. the reports must be viewed as descriptive environmental narratives rather than as final engineering conclusions. Recommendations contained in each report provide a description of potential mitia'ative measures for each particular basin. these measures might provide maximum environmental Protection through capital project construction or development approval conditions. The appropriate extent of such measures will be decided on a case -by -case basis by Countv officials responsible for reviewing applications for permit approvals and for choosing among ' competing projects for public construction. Nothing in the reports is intended to substitute P.SCB 1 n 1 Soos Creek Basin (continued) ' for a more thorough environmental and engineering analysis possible on a site -specific basis for any proposal. QL FINDINGS IN SODS CREEK BASIN Reconnaissance in the Soos Creek Basin was conducted in November 1985 by Ray Heller, resource planner, Randall Parsons, engineer,. and Don Spencer and John Bethel, consulting soil scientists. Their findings and recommendations are presented as follows. A- Overview of Soos Creek Basin Geographic and land use features. The Soos Creek Basin is located north and east of the Green River in the eastern portion of the Soos Creek Plateau Community Planning ' Area. The basin is situated east of the city of Kent, northeast of Auburn, and southeast of Renton. The city of Seattle's Lake Youngs watershed is included in the Soos Creek Basin. The south and east portions of the basin are rural in character, with the north and west portions committed to a suburban development pattern that includes subdivisions and scattered single-family homes. The 1985 King Countv Comprehensive Plan shows areas east of Big Soos Creek (in the northern part of the basin) and south of Lake Youngs with "rural development" designations that specify 1-5 dwelling units (DU) per acre. The southern area to the east of Soos Creek and north of the Green River is designated "transitional." This interim designation will limit development to rural - residential densities until such time as rural/urban designations are made through updated community plans. iThe King County Parks Department owns more than a five -mile stretch from Southeast 192nd Street to Lake Meridian. along Big Soos Creek. These presently undeveloped park lands are mostly wetlands and lie within the I04-year floodplain. Major geologic, hydraulic, and hydrologic features. The Soos Creek drainage area is a tributary basin to the Green River basin. The area is part of the Puget Sound lowlands and is characterized by a glacial drift plain, covered by small ridges and rounded hills that were formed by continental' glaciation. While the Soos Creek Basin is moderately developed, the degree and amount of channel erosion. slope failures. and other forms of geologic and hydraulic damage are far less than might be expected. Artificial conveyances are also still functioning in this basin as thev were ori-inally designed and intended. These conditions may be explained by three main factors. First, there is a very effective natural retention and detention (RID) system provided by an extensive network of 52 wetlands and numerous major and minor streams_ Most of the wetlands are located in the northern portion of the basin in the upland areas as well as adjacent to streams. Big Soos Creek originates in the northeast corner of the plateau and flows southeast to the junction of Little Soos and Jenkins Creeks. then curves west at its confluence with Covin(,ton Creek. Bic, Soos Creek joins the Green River east of Auburn near State Road (SR) 13 at 160th Avenue SE. These wetlands and streams appear to be functioning Nvell as stormwater control facilities for the current levels of development, as well as serving to prevent damage from surface water runoff. P:SCB 2 10 Soos Creek Basin (continued) Second, the soils in the upland areas generally have a high infiltrative capacity, particularly in the southern portion of the basin. Stormwater is absorbed into the ground at these.locations before it can cause erosion or other damage. Third, development in the basin has only just begun. Properly . ! gu fu ncttontng wetlands and streams have not yet been altered, nor have well -draining soils been covered by impervious surfaces to any great extent. Maintaining these properly functioning drainage systems should be a goal in this basin and will be the focus of recommendations trade later in the report. Habitat characteristics The habitat of Soos Creek Basin is generally good and supports large populations of both native and hatchery anadromous fish. The source of the hatchery fish is a State facility near the mouth of Soos Creek. Cutthroat trout reside in stream waters, and anadromous fish spawn and travel in many of the tributaries and the main stem of Big Soos, according to field observations and reports from local residents at the time of reconnaissance. Habitat is being damaged. or ' threatened in some places by bank erosion and degraded water quality associated with land clearing, livestock feces, and wetland filling for development. One of the more serious instances of habitat -threatening erosion originates at the parking lot of the Seattle International Raceway (SIR), which is located on the plateau in the lower portion of the basin. Drainage from the paved parking lot is increasing erosion in nearby tributaries and filling spawning gravels with sediment. Appendix C of this report identifies sites of habitat damage or potential damage. Further water quality m inforation related to habitat in the basin can be found in the Critical Stream Inventory of Soos Creels, published by Metro. B. Effects of Urbanization ' Low levels of development in most parts of the Soos Creek Basin, together with a well -functioning natural drainage system, have kept serious erosion, sedimentation. and habitat damage to a minimum until now. However, the present and projected rates of development indicate that there could be increasing amounts of damage. as suggested ' by the types of problems observed during reconnaissance. The expansion of impervious surfaces in the basin is already beginning to accelerate the rates and valumes of stormwater flowing into (and reducing the capacities of) both natural and artificial. channels. Impervious surfaces are also reducing the amount of highiv pervious soils available to absorb runoff. The predictable impacts are already in evidence: erosion. mass -wasting sedimentation, and degraded water quality and other habitat destruction. The following section provides a more detailed account of problems found during field investigation. C. Specific Problems Identified The studv team examined numerous sites along the main stem of Big Soos, Little Soos, and 'Vest Soos Creeks, as well as 31 small drainages tributary to these main stems. Several of the most significant problems found during reconnaissance are described below. P:SCB 3 J Soos Creek Basin (continued) I. Bank failures On Tributary 0072A, river mile .30, for example, there exists a major bank failure triggered by bank undercutting. The source of the problem appears to be increased runoff from street construction. Unless flows are intercepted and redirected to storm sewers or other facilities, there will be increased bank erosion and consequential deterioration of property and stream habitat, 1 2. Channel Erosion. This includes both instream and bank erosion caused by large volumes of runoff emerging from storm drains and washing away highly erodible soils. This creates a new, deepiv incised channel that enlarges over time. One example of this problem occurs on Tributary 0072 near the SIR in the lower part of the basin. Large expanses of pavement at this location have contributed to high volume flows and channel erosion. 3. Flooding and potential flooding. In numerous locations, development has increased the amount of runoff entering existing drainage facilities or otherwise impeded the ability of natural systems to carry the amount of runoff. When drainage systems fail to function as then were intended, flooding can occur_ Increased development without concurrent increases in drainage facilities adds to the possibility that serious flooding will occur. On Tributary 0091 river mile 1.20, for example (collection point 11), the Little Soos has been contained and manicured as it passes through a developed plat. Such alteration to a natural drainage channel reduces the stream's capacity in places. The result has been the regular semi-annual flooding of some homes. Further development could aggravate these kinds of flooding problems. 4. Poor stream habitat due to: a. Lack of overhead canopy and streamside vegetation. Overhead canopy stabilizes water temperature, while streamside vegetation protects banks from erosion. b. Contamination by livestock feces. In areas of the basin where livestock have 1 extensive access to streams, water quality has become degraded by animal feces. These cause harmful nutrients to be added to the water which can threaten fish survival ' c. Erosion. Streambank and channel erosion, alreadv described above. is caused in part by livestock access. On Tributary 0073, river miles 3.60-4.70. for example, there exists poor stream habitat because livestock have trampled and denuded banks of vegetation, this has led to the sedimentation of spawning areas and caused turbidity. IV. RECOMMENDATIONS FOR ACTION The following recommendations are based on findings of the field team and reflect the original Qoals of the Basin Reconnaissance Program. as outlined in the introduction of this report. A. Inform appropriate governmental agencitz of the detailed findings from the reconnaissance of this basin. Project representatives should meet with staff from Icing IP.SCB 4 1 Soo$ Creek Basin (continued) County Roads Division, Surface Water Mana ment Division u � , Building and Land Development, and other interested agencies to transmit relevant information. B- Reevaluate speciFe policy issues regarding surface Water management. These may include the need to: 1. Improve enforcement of wetlands regulations to maintain these areas in their natural states This will insure their continued function as surface water quality and quantity controllers, as well as preserve their habitat value. If regulation proves ineffective, the County should secure easements or consider other means to preserve wetland areas. 2 Require the establishment of undisturbed buffers and setbacks adjacent to natural drainage swales. Variations in stream morphology and geology indicate the need for stream corridor guidelines that take these into consideration. Improve enforcement of "no clearing" covenants in these sensitive areas or seek County easements or actual ownership. Fencing along streams in livestock areas would help water quality and reduce erosion and sedimentation. 3. Investigate and promote the infiltration of surface water where feasible and economical to reduce increased runoff from developed areas. Also. encourage the use of grass swales and open ditch conveyance systems to improve infiltration and water quality enhancement capacity. Areas of high filtration are identified on final display maps (for the Basin Reconnaissance Program) in the offices of Surface Water Management, Building and land Development, and Basin Planning, 4. Require the tightlining of storm -drainage outfalls down steep or sensitive slopes using state-of-the-art facilities, including high density polvethvlene pipe with energy dissipation at the outfail. 5. Reevaluate stormwater rate and volume release regulations for new develo menu. Current regulations may be inadequate and result in unacceptable downstream erosion that causes property damage and loss of habitat. b. Increase current maintenance levels for King County surface water RID and conveyance facilities- Due to the lack of funding, maintenance of existinz facilities is sometimes insufficient and results in facility dysfunction and failure. These will only be aggravated by additional upstream development, I 1 P:SCB 1 Soos Creek Basin (continued) C. Prepare a comprehensive basin plan to consider, at a minimum, the need to: 1. Enhance and utilize the extensive: existing wetlands as regional storm -detention facilities without jeopardizing habitat values. Prepare a schedule for the anticipated need for these hydrologic enhancements as they relate to projected development in the basin and impact the wetland ecology. 2 Famine existing storm -detention and conveyance faetfiities to determine whether their control orifices are properly sized to optimize the detention site and achieve ' the maximum benefit to the downstream systems. 3. Establish floodplains in low-lying areas of slight gradient for existing and developed runoff conditions, i.e., adjacent to wetlands, particularly for wetlands proposed as regional detention sites where inundation of adjacent properties may be significant. 4. Identify stream reaches critical to the maintenance of anadr+omous and trout populations. 5. Review geologic fwdingss from this study in order to identify areas of particular soils' sensitivity and develop special analysis criteria for new developments. D. Construct the capital improvement projects according to the CIP priority selection criteria. These projects, identified in Appendix B of this report, include projects to: 1 Calibrate and retrofit existing detention -control structures and to improve existing conveyance systems. I Stabilize channels and slopes- 3. Provide regional detention facilities, including the utilization of wetlands. where biological assessment has determined that the natural habitat values wilt not be significantly altered. E. Maintain or enhance the instream and riparian habitats. ' 1. Maintain wetlands and buffer areas around them. These provide both valuable wildlife habitat and natural stormwater storage that helps to maintain year-round baseflows in the stream. I Adopt a stream -corridor policy in the Soos Creek Community Plan to protect the stream corridor from damaging types of land uses in adjacent areas. 3. Encourage the Washington State Department of Ftsheries to allow use of the natural stream system for salmon spawning. Maintain a natural run of all the indi;enous anadromous species. 4. Prohibit fd ing in the 100-year floodplain. The County should establish regulations to prevent the loss of floodplains in order to maintain their natural storage for floodwaters and guard against degradation of important fish and wildlife habitat. P:SCB 6 ST� IN I IT 4 SOOS CREEK BASIN Basin Boundary Collection Point Boundary w ST Collection Point —'Ls- r Stream Fr 2T: --) g - 0072 Tributary Number L -,�Ae& *5401 Proposed Project A 'AT sE w Is Mi. s9 AR s, v-&-v -64 t Y OF SEATTLE WATERS HE Y—� w. ih .*so* M� IT z� Is Io V. 3T 7 Is 009 so d so so 07.. 5412 ;to Y; r�t sac's t �6 III T,_ J� � 4 6 Is so of, *Go 0. 'AT 5468 �!q 01, 0S J o. 5417 0 0 -A 0 F� 540 T-1 A, o I!, 40 119 Ike se M 10 Coungfun 66 —7 ' sEzass s�. j IT •M1Oma Rig Sons fE „fir SOOS CREEK BASIN rf Y r L. Basin Boundary Merick�an .j sE !•, • 1 •�-N�, D •'t os Collection Point Boundary f, s' [ ' ` 54i7 Collection Point o ( , gE:!>i •..r I K �� Stream c •� •. •* • 0072 Tributary Number n *5401 Proposed Project 9 ''� r y ` � I f �.. : I� . • art Y 3 ti - � : :., sE If.��r�` � ,fir � sr� •a+ ��, � i ��t F' Ss p ,� t�l • [. is �. •KE� • n f 3E� ME { '-• • —'� 10 �.•a • • 9 i -• ♦ 4' i Covington y sE _ � s �T� • �� � �-� •I�i• � ! To sA r� _ ♦ • r — aE..r, i� ix Sr •ER 8j ., ..... 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Following the reconnaissance, 20 projects remain proposed for this area. They include the 7 new, previously unidentified and unrated projects plus the initial 13 projects. The previous SWM capital improvements project list for the Soos Creek Basin had an estimated cost of S3,450,000, while the revised list decreases to an estimated cost of SZ622,000. This 24% reduction in estimated capital costs is due mainly to downward revised cost figures for acquiring or securing easements over wetlands. The following table summarizes the scores and costs for the CIPs proposed for the Hylebos Creek Basin. The projects were rated according to previously established SWM Program Citizen Advisory Committee criteria. The projects ranked below are those for which the first rating question, ELEMENT 1. "GO/NO-GO," could be answered affirmatively. The projects can now be considered for merging into the "live" CIP list. Any project scoring over 100 points should be considered for incorporation into the six -year CIP plans. RANK PROJECT NO. SCORE COST 1 5415 135 S 156,000 2 5417 127 223,000 3 5407" 113 228,000 4 5414 105 169,000 5 5409° 100 221,000 6 5416 98 68,400 7 5402" 95 194.000 8 5401 " 59 151000 9 5406" 33 17.800 TOTAL S1.430.000 y Indicates project was identified by SWM prior to the reconnaisance 1 1 1 1 1 1 1 1 1 1 1 1 1 1 z O z 0z u: a �z u Q _Z ��, Z 0 Z cn C �rr R N TA p rJ Cv O �_JwL � U �•Q.� � Z h .0 C O bD c Li p c G -pp O > c y O •� v �•+ � 'ice, � � c f] � C6 -' V C 7 C Q C: 2 r o r a V) 0 3 .� a z et C c9 f w i V CG G v p y O r == Zn- c '� — Ccc > N C 0 cc ° cu a ' � C E w Q _ m N � m N_ o Gi O � e�k ni � C7 � N x +•/ ri c as c t c v CT !q N 10 3" Id Z =C o E� E= c C en o �+mac sQ c C M C C d Q C C fV V hC,q« R .0 y, v ° e7 ! rC Vj 3 N 'C.r C O_ •O O y CZ CZ CcJ1 C v7 C G y .- 0 a.. C ice. . ? 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U Z 1� an > -S a ✓; ,^�. w n _ C) C 75 v r s 7 C v C) � e k w 7 \ k - � /2 � c = 7 2 < / § Z o / § / § E .z 2 � .\ \ \ \ \ 2 = = 2 / \ \ \ \ \ / 2 » © 2 § c �S E ® o © 7 c Irrc o'- o / � �0■ ■ g � � � � 2 8 �§V4 2 £: ©° to 32 / E n _ u k) k / to 2 , \ k \ r 3 k 222 ± e�� 7 2 & 7 •/ / � ® / § 2 2 S G < d \ P 1 TASK 3 FIELD INSPECTION 1 1 F F EXHIBIT J Off -Site Analysis Drainage System Table 1 it 1 L + I We �U 4 con Ma M �Q z W [w Ocn 1 a� .r 3 A 40 zozz z a�pzzz z ate+ a(D+ ate+ .41):+ �.� A � 'p G b s7 z 4) z aD z 0 z v a V'o� z z z z �y As 'n l4n N tr) G C4 y 0 id > N d W � N � x � E bo cn V v� i,i ITASK 3 FIELD INSPECTION There were no major problems reported or observed during the resource review other than the project site lying within the sensitive area known as an erosion sensitive area. Based on the review of the drainage complaints in the downstream drainage course, there were no existing constrictions or lack of capacity in the existing drainage system nor did the field reconnaissance find any potential constrictions or lack of capacity in the existing drainage system downstream from the site. 3.1 Conveyance System Nuisance Problems (Type 1) Conveyance system nuisance problems, in general, are defined as any existing or predicted flooding or erosion that does not constitute a severe flooding or erosion problem. Conveyance system nuisance problems are defined as flooding or erosion that results in the overflow of the constructed conveyance system for runoff events less than or equal to a 10-year event. Examples include inundation of a shoulder or lane of a roadway. Overflows collecting in yards or pastures, shallow flows across driveways, minor flooding in crawlspaces or unheated garages/outbuildings and minor erosion. Based on a review of the drainage complaints provided by King County, there is no evidence of past conveyance system nuisance problems occurring nor is there any evidence of any occurring during our site visit. One drainage complaint dealt with a plugged pipe immediately on the southeast corner of the project site, not on the project site. The project site does not drain to this pipe, which was plugged at one time but was cleaned out and the drainage passing through the pipe was allowed to pass through unobstructed. ' 3.2 Severe Erosion Problems (Type 2) Severe erosion problems are defined as downstream channels, ravines, or slopes with evidence of or potential for erosion/incision, sufficient to pose a sedimentation hazard to downstream conveyance systems or propose a landslide hazard by undercutting adjacent slopes. Severe erosion problems do not include roadway or minor ditch erosion. Based on our site visit and the King County drainage complaints, there is no evidence of, or potential for erosion/incision sufficient to pose a sedimentation hazard to the downstream conveyance system evident anywhere along the downstream drainage course. However, this project site is known to exist in a sensitive area for erosion problems and, during construction when the site is unstable, there will have to be some measures instituted to prevent erosion from occurring on the project site so that the wetlands and Soos Creek are not impacted by sedimentation during construction. 3.3 Severe Flooding Problems (Type 3) Severe flooding problems can be caused by conveyance system overflows or the elevated water surfaces of ponds, lakes, wetlands, or closed depressions. Severe flooding problems are defined as follows: Flooding of the finished area of a habitable building for runoff events less than or equal to the 100-year event. Examples include flooding of fmished floors of homes and commercial or industrial buildings. Flooding in electrical/heating systems and components in the crawlspace or garage of a home. Such problems are referred to as "severe building flooding problems." 1 11418.008.doc [JPJ/tep] 11 ' Flooding over all lanes of a roadway or severely impacting a sole access driveway for runoff events less than or equal to the 100-year event. Such problems are referred to as "severe roadway flooding problems." As mentioned previously, there is no evidence of flooding from the drainage complaints or from our site visit downstream of the subject property. The entire downstream drainage course courses through mostly undeveloped land that consists of trees, brush, wetland, and a meandering stream with a couple of street crossings, including S.E. 192nd Street and S.E. Lake Young's Way approximately 1 mile downstream from the subject site. Most of the downstream drainage course occurs underneath the BPA transmission line easement. The portions of the downstream drainage course investigated by this site visit and a review of the soils map indicates that the downstream drainage course occurs through Alderwood, Norma, Everett, and Seattle muck type soils. The field reconnaissance for this off -site analysis drainage report was conducted on November 29, 2004. The skies were partially overcast and the high temperature was less than 44 degrees. 1 n 1 Ll It 141$_008.doc tlPlflepj TASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS C� 1 11 ITASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS f� 1 n I Runoff leaves the site by sheetflowing off the eastern property line of the site through thick vegetation and a wetland area for approximately 300 feet until entering Soos Creek, which is a meandering stream lying east of the project site. Runoff then courses southerly through Soos Creek until it crosses underneath S.E. 192nd Street though 36-inch CMP culvert at a fairly flat grade. Runoff then courses in a meandering stream known as Soos Creek over 1 mile from the site until it crosses underneath S.E. Lake Young's Way. This entire downstream drainage course occurs through wetland, tall brush, and treed areas. Review of the Exhibit K — Drainage Complaints show that there are no complaints concerning low conveyance capacity, flooding, or erosion in the downstream drainage course within 1 mile of the site. We investigated the complaints that we believe to be near the downstream drainage course based on the complaint list. After review of each complaint, only one is actually near the downstream drainage course. Complaint No. 96-1550 This complaint concerns a plugged culvert that caused flow to overtop a gravel driveway immediately adjacent to S.E. 192nd Street, which this project site will not drain through after development. This complaint has no impact on the analysis to determine flow control requirements for this project II1418.008.doc [7P]1tep] Ij I 1 1 u 1-1 1 EXHIBIT K Drainage Complaints 11 1 L; H 1-1 1 NOV.22.2004 11:05AM KC WLRD King CountyWater and Land Resources MM Division 201 S Jackson St, Suite 600 Seattle, WA 98104.3955 FAX 2 K�-J/ J. M �z M I I I Fax:_ I X Phone: Date: NO.660 P.1/5 FILE COPY Number of pages including cover sheet: From: Candi McKay. Eng Tececli zi WLR�S. rmwater Services Section Phone, 206-296-1900 Fax Number: - 2a6-29 6-0192. IMPORTANT LEVEL I AaA-LYSIS NOTE: We do not send copies of certain complaint types that are not relevant such as BCW, FI, FIR, FIR and WQA, and we do not send CL and LS types. See key below, Type S 1, S2 and S3 will not be faxed due to size constraints. //,. m//z The following is a list of complaint types received by the Water and Land Resources Division Drainage Services Section. Complaint numbers beginning prior to 1990-XXXX have been archived_ and are no longer in our possession. They can still be retrieved, if necessary, but will take additional time and may not be beneficial to your research due to their age, development which has occ=ed, etc. If you are interested in reviewing the actual complaints, they can be pulled (time permitting) for your review. Copies can he obtained for $ .15 per page, and $2.00 per page for plans. Keys: T'YRR9f.InK"ization Aft nMe of Probtem C Action Rcquaet BCW Business' for Clean Water DCA DevelopmmUCodmuckon DDM DwRago-&rucellaneons CCF RcWwse to Inquiry 'CL Claim DM Drainage —F 3raaianl5ed=ntsdm . Eli E06feentent an Hold DLE Drainap —LudsliddHaft movemmt DTA Drainage Teoivaicai Ase4twoc ER Phkwoement Review FCC,I'C Fes Factliry complauus wo PfainW—Cmot ltnclniry FI SWM Fee Iquiry MMA Maintenance - Aesthetics MMF Maintenance - Flooding FIR SWM Fee Ro-vlew Fm SWM Fee on U014 MMG Maintenance - C,cnetal 'LS Lawsuit . MMM X+ 4rimnaaco - Mowing RR Facility F-D&eering Review MNM .Maintenance --Needs Maintenance be"M Muntemoc.NWous weeds NDA NcighborhoodDrainageAsRis Wo WQC wetaQualiryconvidat SWF SWM FeeQutations WQE Water Quality Enfotrcmeat WQB WSW QuRty--ammmagcmentPractices WQD WQR water Qualia lgnginwmg Review WAUX Quality— Malone WQI water Qua*—niieit Connection WQA Wa m Quality Audit WQO Water Quality — o0w P104 SWM Fee-Ramentpuremant CRT Si.S2" Enginearing studiea SWM Fte-anent NWD SWM Foo-New Discount "Subject to Public Disclgsuronequlm=nms 1. Roaalpt oT **i on=qu= for documats Z Revkw and approval by Pmaecuting Auorney's affice [I NOV.22.2004 11�06AN KC WLRD NO.660 P.2/5 Ring MMY Water and land Roonu a Rion - Rmho Sault m SUCUn �A1�ili#Sas1'CIl POnted:li/19/20041:60:07PM cem*wt type fglor cm Ty" of Praido AddrEEEss of ppo m coma [ts Thros Faui 1975-0076 C FLDG RD WY/FLD'D/112TH AVE SE/SF i86TH ST G86E2 1977-Q003 C DRNG 12207 SE 192ND ST ® GOLDEN HILLS 666F3 1877-0072 C FLDG 12202 SE 192ND ST 1976-0080 C PONDING 19248 121ST PL SE EAST OF BENSON HWY 686F2 686F2 1976-0061 C DRNG 19248 121 ST PL SE 686F2 1979-0047 1961-0081 C C DRNG 11403 19917 SE 204TH 9T 122ND PL SOIL BULLDOZEDIPANTHER LK AREA RLOCKE=D/EAST 686E2 SE HILL AREA 886F3 1961-0215 C DRNG 199i$ 122ND PL SE C/8 CAVING IN 686F3 1982-0539 1983-0424 C X FLDG DRNG 12600 12528 SE 192ND ST SE202NDPL EAST KENT AREA 686F2 SYSTEM MAINTENANCE 686F3 1984-0298 C FILL 18504 1121-H AVE SE ILLEGAL NEAR: 17409 126TH AVE SE 60BE1 1984-0313 R FLDG 13250 SE 192ND ST TO RQADS DIVA 686F2 1984-0314 C FLDG 13250 SE 192ND ST SE 192ND ST/134'TH AVE SE 686F2 1984-0324 C 11IING SE 204TH ST/124TH AVE 11986-0702 C DRNG 12240 SE 200TH ST MAINTENANCE OF LOT 686173 686F3 1966-1166 C FLDG 11202 SE 186TH ST STORM OVERFLOW 686E2 1986-1185 1986-1190 C C FLDG FLDG 11202 11001 SE 186TH ST SE 166TH ST SEE: 86-1166 BRYANT, SILL BASEMENT 686E2 GETTING WATER 686EZ 1987.0246 C FLDG 20236 127TH PL SE WATER FROM NEIGHBORS 87-0916 686F$ 11987-0134 1987-0471 C C DRNG FLDG 11202 11202 SE 186TH ST SE 186TH ST CULVERTS BLOCKED 86-1166,1165 666E2 SPRING GLEN 86-1165,1185 686E2 1987-0545 C DHNG 18627 109TH AVE SF INADEQUATE SYSTEM 686E2 1987-0675 C DITCH 19407 124TH AVE SE DRAINAGE DITCH ON PEIOPERTY 686F3 1987-1049 C TO AD CCORD 04/27/87. 6a6F2 1968-0238 C FLDG 18431 120TH AVE SE NEW DRIVEWAYWILL IT FLOOD 688F2 11988-0230 ER PIPE i8431 120TH AVE SE NEED EXTENSION OF 42" CULVEEIT 686F2 1966-0551 C DRNG 20002 124TH AVE SE FILL IN WETLANDS 686F3 1989-0003 C DRNG 16612 120TH AVE SE INCREASED RUNOFF/CHANNEL 686F2 1969-0019 C DRNG 19400 124TH AVE SE DITCH MAINTENANCE 686173 1989-0192 C DRNG 16612 120TH AVE SE X PIPE NOT WORKING 686F2 119119-0411, 19a9-0650 C C DRNG DRNG 12213 18631 SE 199TH $T 111TH PL PONDING IN DRAINAGE EASEMENT 686F3 SE S/W DRNG AND DAMAGE 686E2 1989-0700 X DRNG 18631 111TH PL SE WATER ON SIDEWALK/89-0650 FRITON 686E2 1990-0075 C DRNG 11254 SE 186TH ST PLUGGED CULVERTISTORM 686E2 1990-0141 C FLDG 18400 112TH AVE SE POND OVER FLOW/90.0149,235,372/STOR 686E2 1990-0149 C FLDG 11202 SE 186TH ST R/D POND OVER FLOW/BOB ERT/ STOFIM 686E2 �1990-0231 C DRNG 18425 112TH AVE SE BID POND OVEFIFLOW/STORM 90-274,37 686E2 Page 1 of NOV.22,2004 11:060M KC kJLRD NO.660 P.3/5 WOW mubw Type cm TY111 of pradbem Address It dam Qo�lme�s Tbra$ Pap 1990-0235 1990-0274 C C FLDG FLDG 11202 11022 SE SE 186TH ST 164TH PL WATER IN BASEMENT/STORM/90-141,149, 666E2 HID POND FLOODED/STORM 686E2 1990-0342 C FLDG 11202 SE 186TH ST RID POND/R06ERT/ STORM EVENT 686E2 1990-0372 1990-0664 X ER DRNG MANHOLE 11202 12400 SE 186TH ST SE 201 ST PL R/D PONES OVERFLOW9/90-141,149,235,2 68rE2 FAILURE-LINDA CREST PLAT DIV 1 & 2 686F3--- 1990-0709 CL FLDG 16504 112TH AVE SE CL#12959 SEE CL#13224 DUE DECEMBE 686E2 1990-0884 C DRNG 18427 112TH AVE SE FI/D POND DRAINAGE/STORM 686E2 1990-1061 CL FLDG 11202 SE 186TH ST CL#13224 SEE CLOI2959 GARAGE FLOO 666E2 1990-1063 C DRNG 12025 SE 196TH ST SPRING HILL ONEIDITCH NOT DRAINING 686F3 1990-1186 CL FLOG 11044 SE 166TH ST MEMO/RUDDELLS STUDY TO PA 686E2 1990-1212 C DITCH 11044 SE 186TH ST AD/SIDE DITCH-PILu90-1186 686E2 1990-1212 1990-1212 E ER FILL/DIT FILL/DIT 11044 11044 SE SE I86TH ST 186TH ST WILL START WORK 09120 CHK ON 09/30/9 RUDELI_S 686E2 STUDY 686E2 1990-1226 C DRNG 16615 107TH AVE SE FLOODED BASEMENT/BAD ROADWAY 686E2 1990.1445 1990-1530 C SR DRNG FLDG 16427 18427 112TH AVE 112TH AVE SE R/D POND OVERFLOWING TO STUDY/91-1 686E2 SE STORM EVENT 686E2 1990-1531 SR FLDG 18427 112TH AVE SE STORM EVENT NOT NDAP 686E2 1991-0150 C DRNG 18624 112TH AVE SE 686E2 1991-0150 SR DRNG 16624 112TH AVE SE NOT NDAP 656E2 1991-0196 C FLDG 18425 112TH AVE SE 1991-0198 $R FLDG 18425 112TH AVE SR NOT NDAP 68SE2 686E2 1991-0253 C DRNG 11254 SE 186TH ST 686E2 1991-0299 1991-0299 C SR FLDG FLOG 19835 19835 121STAVE 121STAVE SE OVERFLOW OFF PIPES REFER 686173 SE TO BALD 686F3 1991-0426 G FLDG. 12100 SE 197TH ST WASHOUT OF ROAD/DEVELOPEMENT 686FS S1 SPK TO FINISH S1 3/4 - S2 TO'92 CON 686E2 11111,0438 1991-0667 CL DRNG 18427 112TH AVE SE SEE 91-0438 SEE RUODE=LLS 686E'2 1991-0837 C DAMAGECB 19001 116TH AVE SE C/B BELOW GRADE 686E2 11991-1005 C DRAINAGE 12213 SE 199TH ST PONDING IN YARDIFENCING 686F3 1991-1095 C FLDG 11200 5E 186TH 5T RUDDELL FOND OVERFLOW 686E2 1991-1132 C DRAINAGE 19006 116TH AVE SE INFO TO PM&D 686EZ 1991-1149 X FLDG R/D 11200 SE 184TH ST CCF# 5WM-1031 R/D POND CAPICITY 686C2 1994-OMB C PONDING 11430 SE 192ND ST POSS GRADING/FILLING VIOLATION 686E2 �1995-0200 1994-0144 C C DRNG DITCH ?S 17925 18204 116TH AVE 116TH AVE SE SE FOSS FILLING VIOL/ACT PLAT MORNING G LACK OF CONVEYAYNCE ON PVT PROPE 686E1 666EI 1996-0245 C RUN OFF 19526 122ND PL SE SPRING HILL ELEMENTARY INFO RDS DIT 686F3 C FLOG 12232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 666173 11996-0786 1996-0788 NDA FLDG 12232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 686P3 19SS-0786 R FLDG 12232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 686F3 �1996-0806 C DRNG 19400 120TH AVE SE DRAINGE FLOW QUESTION DEVELOP INF 686E2 I Paget of 4 1 NOV.22.2004 11:07AM KC WLRD NO.660 P.4i5 1- .. covi at bmlw Too code Typ � RmMe m AWm et Prow commoets Thros Page 1996-1550 1996-1564 C C DRNG DRNG 19121 18908 124TH AVE 113TH WAY SE PLUGGED D/W CULVERT IMPACT TO PVT 686F2 SE PRIVATE PROPERTY IMPACT TO PVT DRN 686E2 1996.1635 C DRNG 20024 124TH AVE SE ROAD IMPROVEMENT PROJECT IMPACT 686F3 1996-1906 1996-2071 E C R/D POND FLDG 12813 11828 SE SE 232ND 180TH PL FENCE ENCROACHMENP INTO TRACT 686F3 ST INADEQUATE CONVEYANCE OFFSITE FLO 686E1 1996-2071 R FLDG 11826 SE 180TH ST INADEQUATE CONVEYANCE OFFSITE FLO 666E1 r1997-1123 C GRADING 18908 113TH WAY SE PVT PROP IMPACT NO DRNG INSTALLED 666E2 1997.1123 R GRADING 18908 113TH WAY SE PVT PROP IMPACT NO DRNG INSTALLED 686E2 1997-1179 C DRAINAGE 19113 121ST PL SE INSTALLATION OF DRNG IN R/W OLDIOFF 686172 1997-1179 NDA DRAINAGE 19113 121ST PL SE INSTALLATION OF DRNG IN R/W OLDIOFF 688F2 1897.1179 R DRAINAGE 19113 • 121 ST PL SE INSTALLATION OF DRNG IN R/W OLD/OFF 686F2 1997-1301 i 1997-1505 C C DRAINAGE TREES 19125 12232 SE 121ST PL 200TH ST SE SUBSTANDARD INSTL OF DRNG SYS PVT 686F2 �-- DANGEROUS TREES ON COUNTY PROP 666F3 1997-1572 C TREE 12232 SE 200TH ST REMOVAL OF WINDFALLS REQUIRED 686F3 1998-0019 1998-0058 C C DRAINAGE DRAINAGE 19016 18820 116TH AVE 11 SE NEW GRAVEL RD POSSIBLE PVT PROP IM 686E=2 OTH AVE SE SFR COUST IMPACTING ADJACENT PROP 686P2 1998-0108 WQC OIL SPLL SE 199 ST/124 AVE SE SPILL OF POLLUTANTS ALONG RD RM 686F3 1998-0361 C DRAINAGE 12463 SE 196TH PL INFO REQUR5T RE WETLANDIOPEN SPA 696F3 i 998-0026 C DRAINAGE: 19133 121 ST PL 5E APPARENT OBSTRUCTION IN ROAD DRN 686F2 � 1999-m6 C DRAINAGE 11616 SE 188TH S7 ADJACENT PROP PAVED 2500 SO FT 6e6E2 1999-0329 FCR BAMBOO 12317 SE 179TH PL NON NATIVE GROWTH IN RID FACILITY B86F1 1999-0503 C FENCE 12455 SE 198TH PL REQUEST FOR FENCE BOLLARDS AT ACC 686F3 2000-0398 2000-0572 C C DDM DDM 12625 ACROS SE 192ND ST 19029120TH AVE REQUEST TO DIVERT FLOW DISCHARGIN Ga6F2 -- SE APPARENT FILLING OF ROADSIDE DITCH. 686E2 2000-0572 R DDM ACROS 19029120TH AVE SE APPARENT FILLING OF ROADSIDE DITCH. 666E2 2000-0713 2000-0713 C NDA- DDM DDM IM2 12232 SE SE 200TH 200TH ST INCREASE FLOWWS IMPACTING ARAINA 686F3 ST INCREASE FLOWS IMPACTING DRAINAGE 686F3 2000-0713 R DDM 12232 SE 200TH ST INCREASE FLOWS IMPACTING DRAINAGE 666F3 2001-0247 FCR MMA 12317 SE 179TH PL IDENTIFIED NOXIOUS WEEDS. SLACKBE 686F1 2001-0322 WQQ 11631 SE 164TH ST APPARENT GREY WATER DISCHARGE INT 6 a6E1 2001.0322 WQC WQO 11631 SE 184TH ST APPARENT GREY WATER DISCHARGE INT 686E1 12001-0389 WQC WQI SE 180T & 118TH AVE SE POTENTIAL GRAY WATER DISCHARGE. C 686E1 2001-0389 WOE WQI SE 180T & 118TH AVE SE POTENTIAL GRAY WATER DISCHARGE, C 686E1 �2001-0389 2001-0416 WQR WQC WQI Woo SE 180T 12232 SE & 118TH AVE 200TH ST SE POTENTIAL GRAY WATER DISCHARGE, C 686E1 CONCERN of SOAP SUDS BEING DISCHA 656F3 2001-0455 WQC WQB 12313 SF 198TH ST APPARENT LACK OF POLLUTANT CONNR 686F3 �2001-0455 WQR WOB 12313 SE 198TH ST APPARENT LACK OF POLLUTANT CONNR 686F3 2002-0314 C DAM 18524 114TH AVE SE SHEETFLOW ONTO PROPERTY FROM UP 686E1 2002-0381 C DDM 11625 SE 184TH ST SOGGY AREA IN YARD. MAYBE THE RES 686E1 2002-0403 C MMA 12235 SE 199TH ST REQUEST TO REMOVE TREES ON COUNT 6a6F3 rl Page 3 of 4 NOV.22.2004 11-'08AM KC WLRD NO.660 P.5i5 1 - - - - UMPM Ether Type C* Type of Prrtft AMmu of Primp Cloelmeets Thras P"a 2002-0553 2003-0545 C WOR DTA WQB 19013 16601 114TH CT SE 126TH PL SE CONCERN REGApDING POSSIBLE SLOUG 686E2 2003-0762 WQA WQAI 19433 VASHON HWY SW BMPS are ALL IN PLACE 686F2 2003-0847 2003-0847 C R 11DM DDM 19230 19230 116TH AVE SE 116TH AVE SE APPARENT OBSTRUCTION OF OFFSITE C 686F2 686E2 APPARENT OBSTRUCTION OF OFFSITE C 686E2 20W-0909 WQC WQDR 18601 126TH PL SC AUTO FLUfa RESIDUE ON STREET AS A R 666F2 �2004.0223 FOR THE 18004 124TH AVE SE Tress removed from Facility D92182. Investiga 686F1 . 2004-0286 E MNM 18004 124TH AVE SE Facility D92182 dispersion trench filled/graded 686F1 2004-0266 FCA MNM 18004 124TH AVE SE Facility D92182 dispersion trench filed/graded 886F1 12004-0266 R, MNM 18004 124TH AVE SE Facilely 092182 dispersion trench fled/graded 686171 2004-0337 SUP REC 12462 SE 198TH PL PARKS REQUEST TO INSTALL TRAIL AND 6136F8 2004-0337 SUPF REC 12462 SE 196TH PL PARKS REQUEST TO INSTALL TRAIL AND 686F3 2004-0889 FCS MNM 12232 SE 200TH ST 2004-0453 WQC WQDR 12212 SE 199TH ST POSSMe WQ problem of gasoline in atorm cyst 686F3 saeFa ,2004-0745 C DTA 184111 127TH AVE SE 2 pipes from neighbor drain onto complainant's 686F1 1 PMe4of4 11 UkL. 1 . c 004 10:3(Hr1 M WLHD NO.339 N, 1/1' 1 I 1 1 Ving Counly Water and Land Resources R Division 201 S Jackson St, Suite 600 Seattle, WA 98104,3855 FAX Fax:._ Phone: FIL E Dater c� Number of pages including cover sheet:ll biom: Candi McKay Eng Tech It WLR Stormwater Services Section Phone: 206-296-1900 Fax Number: - 206-296-01 2 ORTANT LEVEL I -ANALYSM NOTE: We do not send copies of certain complaint types that are not relevant such as BCW, FI, FIR, MH and WQA, and we do not send CL and. LS types. See key below, Type S 1, S2 and S3 will not be faxed due to size constraints. #//S/cl� The following is a list of complaint types received by the Water and Land Resources Divisloa Drainage Services Section. Complaint numbers beginning prior to 1990-KKK have been aicluved and are no longer in our possession. They can still be retrieved, if necessary, but will take additional time and may not be beneficial to your research due to their age, development which has occurred, etc, If you arse interested in reviewing the actual complaints, they can be pulled (time permitting) for your review. Copies can be obtained for $ .15 per page, and $2.00 per page for plans. Keys- .*k ," TYM of Xnvestl:Mion Int of Problem 'C AWooRogttest DCA Developmem/Gonsuuction Dew 11ueinrss`for Clean Water DDM Drainage - Miscellaneous CCiF Response to Inquiry DES Drainage--Emsiottlsedimanaktidn OCL Claim DL.H Drainage— LandslidrjR" Movement EH Eadroemm on now ' DTA Drainage Tbx l meal Assistanee ER Enforcement Review iINQ llautage — Gcneml Inquiry FxjK j2M Facility Complaints hnLAA Maintenance - Aesthetics F1 sWM Fee Inquiry NW Wntrtwnce - Flooding FIR SWM Fee Review MUG Maintenance - Guwsal FIR SWM Fan on Hold NUYM Maintenance - Mowing 7LS IAwFuit - MNM Mamtenaaoe—Needs Maintenance RR FaodWEnginftdngRevicw MNW Mairawname-NoxiousWoods NDA Ndohodtoad Drainage Aasiatw= SWF 5WM Roo Quostims WQC Ww" Quality Complaint WQg Water Quality —Best Mumpu=t Practiccs WQE WatarQuaiwE foraetuett WQD Water Quality--Dwaping WQR Waw QWrliW Enuituxuiug Review WQl 'Water Quality — illicit Connectien WQrA WaterQuaIltyAudit M sWMI'ce-RcarMMtatnent WQo wmx Quality— other GRT sWM Fm-(b=t S1.S2,5N3 Snoneating Studies NWD SW Foc-Ncw Discount *Subject to Public Diselpsure regW=romb 1, Ropaipt of wiiaon mqum for do mmanta 2, Review u nd approvat by Pras=uting Attorneys aMrA �J �*^BEC. 1.2D84�1m'38AM""'�"KC LLR t1g.83J�" �P.218T"�T�' fc�tvG coUNTY DEPARTMENT Of PUBLIC WQRK5 r SURFACE WATER MANAGEMENT DIVISION COMPLAINT INVESTIGATION REPORT t, pale'ReC d: NATURE OF COMPLAINT: ��,�,� i� ,,t� �� o LOCA'nON; 1 Ptak-a� SEC iWP�� RGE s tCk' `�.n PL 1yr:6A t KROLL PG, pl b COMPLAINANT: r - b�� COUNCIL DIST. G Address � m --1 � HOME: esr'� city State...�7�P�--•.---- ' WORK, Ca �_ l� tom_ DETAILS OF COMPLAINT; -- — , 01..,.. - . }} •:�{,./+r►1 � �� � l�e�.•+�j � `-^ Star COMPLAINT RECEIVED I1Y: DETAILS OF INVESTIGA11014: I Sketch on reverse side: Yes © No ❑ Photos: Yes © No ❑ 404ty 601JIJ �al -1 phis � e �'AMPLA�NT fNV€5TI4 ATtD BY; ---- -- ---- - DATE: ACTION TAKEN: Complainant advised of action possible or taken by: Prlone 0 Letter O Personal Contact E) - Complaint Action Handled By Closed: Name Date nll •i_ ULL. 1. C1004 1b: �3HH -KC WLHD NO. 839 P.3/118 KING COUNTY SURFACE WATER MANAGEMENT DIVISION DRAINAGE I ESTIGA.TION REPORT Page i s INVESTIGATION TIEOUEST Recelved by: Type . I Date: 8 f � fa OK'd by: 1) Flle -No, ReCeived from: {Plea(Day) se print plainly for scanning). Q � / NAME;: / � /. e PHONEIg5� CIY_09 � State Zip Locatldn of problem, it different; 1 , Pepor:fed Problarn; Go f off' $� Z ? S /o Pl4 name: or , rye S n (,'a+w�e.✓t IRS Vi d Other agencies involved; Lot No: 13 Block No:. No Field Investlgatlon Needed y — Parcel No. �clo O Z(� & /4 s T n Kroll 5S .1 Th.Bros: New 6 Basin c Council Dist Old Charge No: �.....,L. V{lizen notftled on LKLA91 by _):!�phohe letter ' in person &?y g-f4 r - 1L M�.�rs�vr, r--ell [71T1zc,�C! 7,GA Ok T P1rc% Lac..) . K�oraGO �G�s Dryer�.�aP�,9r.•c�T— I3POSYr101vc Turned to , on, by Lead agency has beer{ notified: Problem his been corrected, Na probleM has been Ident[ried. Pr" ale problem - NDAP w111 rlat consid6r because. P_ Water originates onsite and for on n8ighboring parcel — L.ocadoa Is outside SWM Servlce Area ATI~ CLOSED: �_ .� Alo' by - - IKpf OR: No further action recommended because: rliui invesugaticn addresses problem: 'Be File # — Other (Specify; I A61-0 64TI DEC. 1.2004 10:39AM KC WLRD /�,L Nno- NO. J� P.411P 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 VJng County FII.S No. 96-1550 Surfur}aoe Water IMIlanagemenR NAME JEANNif RfM Mmmm+p Z~ d,,,■.e,.. ADDRESS 19121 - 12TH AVE SE DRAINAGE INVESTIGATION REPORT -PHOn 1554.1138' T$ 'AGE 08sF_ FIELD INVESTIGATION KROLL PA[3E som DATE 9.13-96 MAIM DIVISION 4 MrrL°• - NIAM DETAILS OIR INVBSTIQATION: SITE VISIT ON 9•e18-11es. PLUGGED DRAINAGE CROSS CULVERT INVE&TIGATION FOUND GIGNS 01' DRIVEWAY BEING; WASHED OUT AT 101911 - 124TH AVE sr. AN 1I1- CONCRETN 0111VEWAY CULVERT WAS FOUND To 015 FULL. OF SEDIMew ANp 00AVEL WHICH 18 RESTRICTING PLOWS. DURING INVESMQATIoN ONLY A SMALL AMOUNT ON WATER WAS PASSING THFICUQH THE PIPE. PHOTO$ TAKE" # 1 LOOKING AT DRIVEWAY AND SIGNS OF WASHING OUT CAUSED BY PLUGGND CULVERT. * 2 LOOKING AT UPSTREAM END OF CULVERT IMPACTED WITH SKETCH: HOURS 1oi21 lk GRAVEL- DRIVww" AREA IMNQ WAsHuo WT POWER AoLm 0/��� =:ii:: ( Z 1 0"0 WLVMT lr COM PIPE ROAUNDE 13raA1NAQE ! a; ::i;ar FLOW SE 192ND ST DEC. 1.2004 10:39AM KC WLRD NO. 839 P. 5/ 1 ES 1 1 1 1 1 1 1 1 1 1 1 TO TONY LED19ETTER SUPERVISOR ENVISOR ,.. � ROADS DIVISION 4 RENTON MAIL STOP GA FROM LARRY Q8 12 Lt, SL SURFACE WIi,TER MA14 LOCAL DRAINAGE SERV16t King county MAIL STOP G22 SUrface, Water Management RMY&M JbW 9--WFOA. . I MESSAGE 'DATE 9-27-96 FOR YOUR RESPONCE, DRAINAGE PIPE AT 18721 124TH AVE SE APPEARS TO BE WITHIN THE 120- RIGHT-OF-WAY AS SHOWN ON THE ACCIESSOTIS MAR PIPE APPEARS TO 13E PLUQGED. PLEASE REPLY IF ROADS WILL CORRECT. IF NOT POSSIBLE NDJL DEC C. 1, 2004 � 10 40A l: LRD WATER ANTI NO. 899 P . 6/ 1 5 .g ? 1 I�AND RESOURCES DYMION� Irk 4 DRAINAGE INVESTIGATION REPORT � V ` PROBLE Page 1: 7Wn0An0N REQLrPST my� r.�i TyPc � 1ZEC6i'v$r1 1 lccex ved from: (Day) LiL_ � 1 (Eva) PHONE 0p S�CiState 1.�- Zip Location � of robl i P , different: ' Re vrled Prohlem: ' p CAU FI1M ❑ (Would Like To Be i'resant) _ p , �2 ff �-�7z y a �r // �.� JO ✓ 77} Cyr �fJ��3 �.c-� �/TAN , � � •--t� C� i.,rJ! � � 4� r��c�. s��'� �� o �J � �?C-� Trr, ' /�La� 1`71��' �/•. i� f %fie-' •�7 c f �� �� � S o �/f�r �1 ,¢,emsT dry Pl t name: K)0(441-UJU" 0 &v01n4lv,(_+$ -D►4 1 Other agencies involved: Lot No: Block No: No field investigation required (initials) %a S T R Parcel No. 1 R g�� Kroll (P 5Vj 1.Bms: New 6 � ' Basi� _ Council Distri � 01d Z � RESPONSE,, Citizen notified on - by., .�.. ..�. � ... � ~ . � _..... Charge No, w. _,........ �....,.... ' by. phone letter in person ejgq L'6 1 •t - Q� stlo %err rr t Esc. 1 - '6' 1 DISPOSITION: Turned to�l„ on U ! I �� b Y OR: No fintber action recommended because: Lead agency has been notified: Problem has been carrected, No problem has been identified. Prior investigation addresses problem: Private problem - NDAP will riot consider because: s =Water originates onsite and/or on neighboring pa=i. Location is outside WLRD Service Area, BATE CLOSED: By: (Specify): 1 By. lltL- 1.ZU04 10:40AM KC WLRD NO.839 P.7/18 L KING C OLWTY Department of Natural Resources ��. Water and Land nesource DlvIalon Y DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION - Fina Na. 97-1179 NAbm STEvE SK )ALS _ ADDRESS 19113 . 121ST PL SE PHONE a64=4201 TB 1'AcE KROLL PACrB _ som I)ATE _7_25.97 IuiAIN`); nIVnION � INITIALS - MAM DETAMS OF INVESTIGATTON: SITE VISIT ON 7-24-97. PROPERTY OWNER AT 19126 - 121ST PL SE FILLING IN DRAINAGE DITCH WITH S° PERF. INVESTIGIATION FOUND 191 ST PL SE IS A PRIVATE ROAN WITH AN OPEN DITCH ON THE WE&T 81aE OF THE STREET, N 7HI~ PROPERTY OWNER A7 19125 IS IN THE, PEiOgES$ OF INsTALLING A 6' PP PIPE WITH DRA1N 8GJ(T IN THE DITCH IN FRONT OF THEIR PROPERTY THE EXISTING DRIVEWAY CULVERTS ARE 12' E WITHN R TE. FURTHER INVESTIGATION FOUND A CONTROL STRUCTURE WHICH SERVICES THE DRAINALiE DITCH. IT APPEARS THE PROPERTY OWNER AT 19133 - 1913T PL SE HAS FILLED M HIS PORTION OF DITCH WITH 6• PERF PIPE. PROPERTY OWNEFjS MAY BE REDUCING TH$ STORAOE: VOLUME WITHIN THE BITCH BY FILLING, PHOTO$ TAKPN # 1 LOOKING NORTH DOWN 121ST PL Sk, # 2 LOOKING AT THE 6 PE'RF PIPE INSTALLPr) HY PROPERTY OWNER AT HOUSE 19133. # 3 SHOWING INSTALLATION OF PIPE IN FRONT OF HOUSE 1912s. #► 4 SHOWING INSTALLATION OF e• P9RF PIPE: IN FRONT OF HOUSE 19126. # a LOOKING SOUTH DOWN 121ST PL SE FROM IN FRONT OF HOUSE 19113. 1 ' SKETCH. t 11 >j 9r� �19� �kl "IWA PgA- (p'gy { P4 $E '.� g"w.o I VdA HOU9Q 10185 Rr' FERI O6 0AMN I3 12- A �ai93 �p CONTgoL 81n1UC7VRQ �- 12- CONQ SE 192ND ST �5 �I� (,..►a". j�L ��S �y 11 DEC. 1.2004 10:41AM KC WERD N0.933 P.S,' 12 1 r ' NEIG19BOXHOOD DRAIXAGR ASS=STANCS PROGRIIN COMPyLTNANT EVALUATION mW0 DST$: September 2, 1997 a TO: FILE FROM: JEFF JACOSSON EMINRERIM LVALMTIQAI FOR COMPLAINT NO. 97-1179, Skoala COMpLA+11-TT C RONOLOGY: OP-10INATr c. 7/21/97 FIELD INV: 7/24/97 FIELD ESTAL: 9/03/97 OLD FIL13S: N/A RACROROIIND: ' Z'he complainant lives along a private roadwa 879082. The original drainage Part Of 5the topent plans ditch system on the west for the chart plat skxowy Side of 121st Place SE was designed for infiltratiori/retention as well as conveyance. The open ditch conveys soft to a control structure located at the intersection of 121st SE place and SE 192ud Street. The open ditchee have 12-inch driveway culverts located intermittently, connecting ' them to one another. The complainant is concerned with the recent development in the area and the intruaiors upon the Open ditch system. Last year the resident at 19133 121st Place SE filled in the open ditch fronting the property as part of their detached garage addition. A 6-inch Perforated conveyance pipe was installed before the ditch ' was filled. Accorditg to the complainant surface water from the open ditches overtopped the roadway and flowed east 1215t affecting the residents living on the of east side Place SE. This Bummer the residents at 19125 121st Place SE are filling in their open ditch while adding a 6-inch perforated conveyance line connected by a aeries of lawn drains as part of their detached garage'construction, ' The complainant believes the integrity of the drainage system will be severely compromised and future flooding may result from these activities, ' FnmTNG5 Since the problem meets all of the NDAP project criteria listed below, it qualifies for and has been investigated under the NDAP program. The problem site is Within 'nvolve a King County MC) codesv olation� area and does not 1 DEC. 1.2004 10:41AM KC WLRD N0.M9 P.9i13 a ' The pxoblem site shows eviddnce of or reported localized flooding, erosion and/or sedimentation within the offroad drainage systom on private residential and/or commercial property due to'later upstream development. ' The problem is caused by surface water from more than one adjoining property. SOILS - According to the, RC soils map, the site is located in the following soil association.. ALDERWOOD ASSOCIATION: Moderately well drained undulating to hilly soils that have dense, very slowly permeable glacial till, at a•depth of 20 to 40 inches; on uplands and terraces. OPTIONS AND OISCt7SSI0Di: l- An enforcement, letter can be sent to the afore ned residents who filled in the open ditch system. The letter fiWilloask for ' their cooperation in removing the conveyance systems so the.open ditches can be restored to functiM as designed. RW0jtC=MftT nWACT 96ORD . 40 PROPOSED SOr.ATYCNa ' Aa enforcement letter will be seat. M'PCRC MRT PXXORITY SCORN = 40 • .1 1 DEC. 1.2004 1O:42AN KC WLRD NO.829 P.1Oi12 xtng County U Watm, and Land Resources Division ' Dep$rm=tOfNatural Reanur>ces VQ FiN, Avenue, Suite Uao Seattle, WA 98104-W22 ('306) sas-"19 (300) 296-0192 FAX September 16, 19.97 David Gibson 1.91251210* Place SE Renton, WA 9805$ 7237 .. i 1 ! 1Ay AIM1 'A/u i1t On $ePtember 2, 1997, Water and Land Resources i drainage prablern reported in Your nei borhooa. R) Division staff investigates a of the existing stone wafter facility is being reducedby the insWation of the dnvestigation found rainage the capacity found in the roadside drainage ditch fronting y� rage a?nage system tchis were established to detain, and infiltrate as wolf as convey stoor�ra water• Filling m lthe ditches may detract from their ability to control the aonveyanee of storm water flows, sending water ontothe roadway and your neighbors' propeerties. This presents a hazard to public safety. You may not be aware that, as prOPertY owner, you could be liable for any personal injury or Ply damage that results from this condition, ■ We recothat you ditch frontingnting remove the closed-P Pe conveyance systana found in the- roadside Your prey to help resolve this condition. ' This letter is not an enforcement action or a notification of violation of Rin � Coon Purpose is to bring this drainage g ty law. Its becomes more serious, ob to your attention so you can take action before it If You would y like more information about this drainage problem, or would Elm technical assistance in resolving it, please can Jeff Jacobson, WLR Division Local. Drainage Services Unit Engineer, at 296-1953. Thank you for your attention to this matter. sin=ely, 1 f ' Curt W. Crawford, p.E., Ferule S Engineer Loral Drainage Services nit ' CC:JJ;inmo cc; Glean Evans, P.E'., Senior Engineer, Local Drainage Services Unit 'Formerly Swface Water Managmwnt OW) Division DEC. 1.2004 10: TAM ACC WLRD N0.839 P.11i18 King Co=ty W7ater and Lgmd.Resararces Division iaepartmeu t' ur xA ftu-a7 lescurcas 700 Fifth Avenue, &site 2200 ,Seattle, WA 9610&�5012 CLOG} 296-SX19 (206) 206.o182 FAX September 16, 1997 913o 3 11 ften Southeast Renton, WA 98058-7237 RE; Dear Mr. Vargo. On September 2, 1997, Water and Land Resou l drain �e problem ice) Dzvisioa staff investigated a re!Pmted in your neighborhood. Our iavesdgattion found the capacity of the existing storm ^'later f4cility has been reduced by the installation of the drainage system found in the old roadside ditch system fronting your ply, The drainage ditches were established to detain and infiltrate as well as convey storm water. Filling in the ditches detracts from their ability to control the conveyance of storm water flows, sending water onto the roadway and your neighbors, properties- This you may not be aware that, as property owner, You is Presents be liable for any Public safety, Or property damage that results from this condition. Y personal injury iWe- recommend that you remove the closed -pipe conveyances stem frontin and re-establish the drainage ditch system to resolve this condition. g your property ' This letter is not an euforcezne at action or a notification of violation of KingCounty Purpose is to b this ty Iaw. Its drainage problem to your attention so you can take action before it ' becomes more serious. If you would like more Mformation about this drainage Problem, or would l asily technical in resolving it, please call Jeff 7arobsal Uniton, WLR Division Local Drainage nServices icalUnit Engineer, at 29�1953, Thank you fax your aCtention to this matter, Sincerely, r Curt W. C,rawfard, Local Drainage Sezvices zit g Engtrteqr . CC;JY-.isms cc- Glenn. Evans,, p.E., Senior Engineer, Leal Drainage Services Unit l , Formerly Surface Water Managemem (s m) Division 1 1 1 DEC. 1. E004 10: 43AM�KCWLCy WATER AND LAND RESOURCES D IONS DRAYNA GE INVESTIGATION REPORT PR(3BLEM:• PA& 1: INVESndATION REQLMSY r Ric van aY: 1, Date: $"Z OK'd by — Received from: P.1211c; • i Type -- �- 13 r� i A3 A.& I Ir � (Day) �� (Eve) L`? NAME: PHONE ADDRESS: State vi -A zip ` PO sy Location of problem, if different: R t 12-1 C -r ipL S d, t, ReporledProbjeyn. CA"" FIRST 13 (Would Lacs To Be Present) e,ft7-wj 98658-7Z3-7 ��' � •� �r��j-,r-�.J � ��.�" 5s�itx.��� 2'� � nl T �i��� h- t 4 P Plat naive: Other agencies involved: Lot No: 9 Block No; No field investigation required T R Parcel No._6 D �a / g - Kroll 1&5-1J Th.Bros: New Basin Dfl Council District- 1 Old 47- 11,66 ...W.__..._.....�,w....r�............_.,..-...._......�.....,...� Charge No. kFSPONSE; Citizen notified on - �. ._ .. _ _..� -. __ ....._._........_.._..- ............. .._.......... �—. _.�. phone letter in penon Cor+tiF(-Ajur O.L.oS—qz" D T-a C?-1 f 1-1Ct f4,q10 N V CF eTrG. odt r`"i 0.c-1 /?7-'Q I.l IJ2Lr,� DISPOSMON: Tumed to ' on I I €y OR: No filrther action recommended because: Lead agency has been notified: /Problem has been corrected, No problem has been identified. Prior invest' an addresses problem: Private problem - NDAP will not consider became: SEE �� Water originates ousite and/or on neighboring parcel. Location is outside WLRD S Other (Spec%fy): DATE CLOSED: 1 ! 7' 7 $y; ..� ,,...DEC. 1.2004 boparbuent of Natural Rosoriroas Water and Land Rosaurco Division DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION fl 1 10:43AM KC WI_RD NO.839 P.13 1'S Pave xo, 97-1301 NAME ANONYMOUS . __ AID MESS 19125 - 121ST PL SE PHONE TR PAC3E 886-F2 KROLL PAGE 605W DATE, 7-25-97 MA1NT DIVISION --4 ngrflAIS - MAM DETAILS OF INVESTIGATION: SITE VISIT ON 7-24-97. PROPERTY OWNER AT 14125 - 12i$T PL BE FILLING IN DRAINAGE DITCH WITH Is' PERF. INVESTIGATION FOUND 121ST PG S19 18 A PRIVATE ROAD WITH AN OPEN DITCH ON THE WEST SIDE OF THE STREET, THE PROPERTY OWNER AT i*i16 IS IN THE PFIOCEI;S OF INSTALLING A a• PERF PIPE WITH DRAIN 15OXES IN THE DITCH IN FRONT OF THEIR PROPERTY. THE EXISTING DRIVEWAY CULVERTS ARE 1r CONCRETE. FURTHER INVESTIGATION FOUND A CONTROL STRUCTURE WHICH SERVICES THE DRAINAGE DITCH, IT APPEARS THE PROPERTY OWNER AT 141W - 121ST PL 8E HAS FILLED IN HIS POp71ON OF DITCH WITH 49 PERF PIPE. PROPERTY OWNERS MAY DE REDUCING THE STORAGE VOLUME WITHIN THE DITCH BY FILLING. COMPLAINT CLOSED TO 97-1179 SE 192ND ST NO. DEC. 1. 2004— i0 44i I GKC lJ U11'ry WATER AND LAND RMURCES D 'LSi+O� �.- 4' f DRAINAGE INSTIGATION REPORT MV, PR013i,EM: PRA 1 IV A id f- Page 1: INVF nGA-nON REQUEST Type . RECErvpn SY: D. LJ A NCo c_� 9 � p�db I� Received from: � , NAME: Plc (Day) --� (Eve)—,� PI10NB 7�2 -? 754 M4 21 7 Z ADDTtE55:Cityj�� �� r Location - �'j $-rL. �L f l�Tbl� State , � dip on of problem, if different: be Re orted Problem: lern; CALL FIRST ❑ (Would Like To Be Prese- nt) 7L ILA }S Plat-narne: MoQ i- evLz r4 ,tom j�1 Lot No: Other agencies involved: Block Na: No field investigation required To n C4MP {initials) 8Y COMPLAAIT Wnm1RANi si'AFF` �� T R Parcel No;E� 3 Z 0 -' DY 1 45 Droll 4 Th.ams; New F 3 Basin S (� o S Council District Old �i�'e b �—' Charge No. fzsPON.YE. Citizen notified on 4e-Iv-`?t •Tr?L4 c by.,�, Phone letter in person �r7z� /��dr.-rr'�y�'�' ������,'✓1s !row �fiCfi' �. � /�% ��T= X 9`S lC'1IJln G�ax�.r y 1'� o�,�r�, ass c� r1.,.�.s .8•.r �rr9rt-�isr Fu�Gun.at, O 1 f 14 6 h% T Ta ttc v� ,So aS CR c= .rC iJ�iRe. �C�Did'S�✓ ��'�svy� IVI c� S.vQ Crap y. od • T Rr-j,,c.,e ryaL,$ FOR Tit cT Coco � C'o p4 /.v DISPOSITION: Turned to on / / by__r__ OR-', No further action recomanended because: Lead agency bas been notified: Problem has been corrgoted. No problem has been identified. � _ _ Prior investigation addresses problern: v►�II not consider because Private problem - NDAP SEE FILE IV ; Water originates onsite and/or on neighboring parcel. ��i-ocati4a is outside WLRD e _other (S ecify): DATE CLOSED: By: / 7 %'/,9 /�!//�Q 0 41 L7 CFZ 1 L�i DEC. 1.2004 10:44RM ' KC WLRD N0.G-39 FI WG COUNTY WATER AND LAND RESOURCES DimloN DRAINAGE DMESTIGATION REPORT PRoMM�C Page 1: NVESncAnmxREQUm �0 OK'd. Received from: .P.15/11c� Type. (Day) ( Z5.'A (Eve) NAB: /L PHONE FS4- ?4 ADDRESS: / �/ �.Z ST S CitytlTi�.! .ta _,�,J,4 Zip Location of problem, if different: / -/Z - Fg .Reported Problew CALL I+TRS'T MJ (Would Me To Bc Present) . I} -Sin- 5. �) / c 1 f4 S FA.1 C c--0.9C 1�/ v �e�� �S �c�iy! ^Y 5�-= l s✓ i7 ?^ arm /A0 V, S C I I IJ w . 2. r 97-MMI/30/' r�.�o .. drdrr►a� `. r , t 04 adm os 4�4\A Plat name: Ran - - el'Lot No. Black No: Other agencies involved: No field investigation required initials /4 S T R Parcel No. 601 Kroll fo 1 TILBros: New 6Z iV/ Basin ` X Council District Old . � Charge Na. -RES- o"M Citizen notified on 9 q by; phone letter in person � r Car- r-CW 4-40w :1.0n `/ �' �►f3 � .v�FXJft � .spy �coSC� �Ff✓� Rnrpr�vz P /70,vps P/v/.s/air 'no L' �.� � �+,w.q� CAI Sr 13;ZVo sr DYS OSMONi Tweed to on bY-- OR; No further action recommended because: . Lead agency has been notified: / L/ 4— Problem has been connected, No problem has been identified. � Prior investigation addresses problem: Private problem - NDAP wlfl not consider because: Water originates onsite and/or on neighboring parcel Location is outside WLRD Servi Other (Spec��): DATE CLOSED: / / By. DEC. 1.2004_10:45RIL -lKC WLRD _ NO.839 P.16/18 -- KING COUNTY Department of Natural Resousrcee Water and Land Resource Division DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION 1'n-E No. 98-0926 -NAME GARY MANGO ADDR8S5 15193 - 121ST Pt, SE PHONE 3 4 8 -26 '1' PACxE DROLL PACs$ O6 DATE •22-99 MAINT. DrWSION 4 — DZrflAIS - MAM DETAILS OF INVES'ITGATFON- SITE VISIT ON 1.12.90. STREET DRAINAGE BLOCKED CAUSING DRAINAGE SYSTEM ON PRIVATE ROAD TO BACK UP. INVESTIGATION FOUND THE DRAINAGE SYSTEM ON 1216T PL SE HAS A CONTROL STRUCTURE WHICH DRAINS TO A N CATCH BASIN IN THE ROAD AIGHT-GF-WAY. THE SLIDE GATE FOR THE SYSTEM WAS OPFN WHICH ALLOWS FOR WA7EA TO PLOW INTO SYSTEM FROM STREET CATCIi BASIN, CLOSED SLIDE GATE AT TiiI3 TIME, INSpa:cTED STREET NTS pRAINAmE ON SE 192ND $T JUST EAST OF 121ST PL SE FOR ANY BLOCKAGE, WHEN LINE WAS CANDLED LIGHT REFLECTED BACK. THERE APPEARS TO BE A METAL OBJECT ABOUT 60' DOWN THE LINE, TALKED TO COMPLAINANT IT WA9 SUGGESTED SLIDE GATE BE KEPT CLOSED TO PREVENT A BACK WASH INTO PRIVATE 6YS7EM. MENTIONEI3 A MEMO WOULD Be SENT TO ROADS TO HAVK THEM INVESTIGATE OBJECT IN PIPE, NO PHOTOS TAKEN HOUSE 1@raa SE 192ND ST W m -j F N r r CAROLED PIPE NOTED SOME TYPE OP BLOCKAGE UGHT RERMOTED BACK DEC. 1.2004 10:45AM KC WLRD NO.839 H.3�i1e K NG COUNW WATER AND LAND RESOURCES D1VYSjoN DRAINAGE INVESTIGATION REPORT — Bror INVESTIGATION REQUEST T� pe F1�pST�EM: RECEIVED BY, /1Jl V1i _ Date-55/2OK'd bv: ' FyLc No. Received from: ��!!���,�-/{ (ond d � (Day} �_ �l (Eve) INAME; PHONE 9� _{ 1 ADDRESS : ZCn 2 SE %2 & & city S trite zip LOCATION Or PROBLEM, IF DIPFERENT: Access Permission Granted Ej Call First (Would Lle To Be Pre mt) `® a 60LY1� 41 �/irn�' u� SD Gtt?. .rl flop kb�> Era . 1 Plat name: Other agencies involved; 'S" �2-2--6 /a S T R Lot No. - Block No: No field investigation required Parcel No. L'2Z025qL4 2 Kw Il -tb. Th.Bros; New � F g Basin` Council District Charge No. _ T_ I-RESPDXSE; Citizen notified on 97r 16 - 00 hy; phcMC letter a/ in person 0206,t.d. 0+1 gs;-V 1 r�y:de.d, i r.'Fr+r+no :orz &.^d ©DES �a+r�dau"t� DISPOSITION, Tamed to on / 1 bY+ OR: No fildher action recommended because: Lead agency has been notified: Problem has been corrected. No problem lies been identified. Prior investigation addresses problem: SFX FME # 'C Private problem - NDAP Will not consider because: Water originates onsite and/or on neighboring parcel. Location is outside WLRD Sewce jLrea. DATE CLOSED: 107 G BY: /r other (Specifyi- P+ecr- DEC. 1.2004. 10:46M{KC WLRD,:`"'s," ;:1'' ;;;:+ i ;,�,+i `}`' �• r y c '1, J :r.�,. r NN0.839. n.,_ .16 1 r , Cornpla nt 00-0398 Mondragon Investigated by Robert Manes on 5-31-00 I met with Richard Mondragau and I explained to him that the eytisti% drainage had been in for some time and the Road Dept, would not change it. Richard explained to me what he wants to do. M wants to put in an access road from the street to his game. I told him he would have to apply for a grading permit. I gave him the DDES handouts with an information sheet with phone numbers aid address. I suggested that he try to avoid filling m the low area where the water backs up from the drainage, as that may tngger a drainage review on his permit. I closed with him on site. 1ZnOMP lvlondragon 12625 SE 192r'd Sit. TOP NTS I 11 1 I TASK 5 MITIGATION OF EXISTING AND POTENTIAL PROBLEMS r I n I 1 TASK 5 MITIGATION OF EXISTING AND POTENTIAL PROBLEMS The area downstream of the proposed project known as Laurel Springs does not exhibit any potential problems, nor is there evidence of any existing problems in this downstream drainage course. Since the KCSWDM has indicated that Basic Water Quality and Level 2 Flow Control are the required means of treating and detaining runoff, this project assumes that those are adequate for this site. This project will neither aggravate nor create a problem as specified in the problem specific mitigation requirements as set forth in Section 1.2.2.1 of the KCSWDM as delineated in Task 4 of this report. A Level 2 or Level 3 Off -Site Analysis should not be required for this project site as there is no evidence of existing or potential problems identified in this Level 1 analysis. In addition, the project site is not flat; however, the downstream drainage course is not very steep compared to the site. There is a broad drainage course with existing wetland areas through which Soos Creek has a lot of room to meander. The 100-year floodplain for Soos Creek is a good 6 to 8 feet lower than the lowest point on the project site. The project site does not contribute more than 15 percent of the total peak flow drainage downstream from the site. In addition, since the project site is known to be an erosion sensitive area, special measures will have to be instituted during construction to keep sediment from traveling off site. Those measures will be addressed in the Technical Information Report prepared for this development. I 1 1 I1 ] 418.408.doc [IP!/tep] Page 1 of 1 Whittaker, Bruce From: Whittaker, Bruce Sent: Wednesday, June 21, 2006 929 AM To: Tibbits, Chad Cc: Langley, Kristen; West, Larry Subject: Wehrman L04P0027: Conditions Attachments: WehrmanCond.doc Chad, Please see my proposed conditions attached. Kris: I folded your draft walkway conditions into this --OK? Thanks, BW 06/21 /2006 Bruce Whittaker 6/20/2006 Wehrman L04P0027 Proposed Conditions 8. The drainage detention facility shall be designed to meet at a minimum the Level 2 Flow Control and Basic Water Quality menu in the 1998 King County Surface Water Design Manual(KCSWDM). 9. Storm drain stubs for future connection shall be provided along the west property line in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006; unless otherwise approved by DDES. 10 The applicant geotechnical engineer shall provide recommendations for the design and construction of the proposed site grading, road design, rock or retaining walls and drainage detention facility design. The geotechnical engineer shall evaluate the site for potential groundwater seeps and provide design recommendations to address groundwater found. The geotechnical recommendations shall be included in the T.T.R. and incorporated into the design with submittal of the engineering plans. 11 Special geotechnical construction inspection of the site grading/fill, road construction, rock or retaining walls and drainage facility, is required to ensure compliance with the geotechnical recommendations. Inspection reports shall be submitted to the assigned Land Use Inspector during the construction phases of those facilities. A final construction report shall be submitted verifying compliance with the geotechnical recommendations. 12 The following road improvements are required to be constructed according to the 1993 King County Road Standards(KCRS): a. Road A shall be improved at a minimum to the urban subcollector street standard. A temporary turnaround shall be provided at the south end of Road A. This improvement shall be designed in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006; unless otherwise approved by DDES. It is intended that this improvement will match the proposed road improvements for the plat of Flueve De Voiles File L04P0002. b. FRONTAGE and OFFSITE: The frontage and offsite portion of SE 1881h Street from the west boundary, west to the existing road pavement, shall be improved at a minimum to the urban'/z-street standard. This improvement shall be designed in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006. Other designs for this frontage and offsite improvement may be considered, as approved by DDES. Offsite Walkway Improvements: These walkway improvements shall be designed in general conformance with the conceptual school walkway plan submitted April 191h, 2006, unless otherwise approved by DDES. These improvements skull include any necessary grading and storm drainage work necessary to either tight-Iine the abutting roadside ditches or relocate the ditches within existing right-of-way. + SE 188t' Street (120t` Avenue SE to match into the above 1/2- street improvement near the west plat boundary)shall be widened to provide an eight (8) foot wide paved shoulder along the south side of the street. SE 188`h St(116'h Ave SE to 120rh Ave SE) shall be widened to provide a minimum 16 feet wide paving as measured from the construction centerline. This will provide an 11-foot wide travel lane and a 5-foot wide paved shoulder. 120t' Ave SE(SE 188`h St to SE 1840' St.) shall be widened to provide a minimum 16 feet wide paving as measured from the construction centerline. This will provide an 11-foot wide travel lane and a 5-foot wide paved shoulder. C. Modifications to the above road conditions may be considered according to the variance provisions in Section 1.08 of the KCRS. Page 1 of 1 Whittaker, Bruce From: Whittaker, Bruce Sent: Tuesday, February 07, 2006 9:45 AM To: Tibbits, Chad Cc: Langley, Kristen Subject: L04POO27 Weherman recreening comments Attachments: WehermanReScr.doc Chad, Please see my comments attached. Thanks, Bruce W 02/07/2006 Weherman L04P0027 Re -Screening Comments Drainage: Bruce Whittaker 2/7/2006 Please evaluate the offsite upstream flow entering the site across the west boundary. Revise the conceptual drainage to provide provisions for this flow and a future connection for properties to the west. Rmds- Please include a more detailed offsite walkway inventory showing widths of pavement, shoulder widths or walkway widths. Include a conceptual offsite walkway improvement plan for the proposed walkway improvements. Page 1 of 1 Whittaker, Bruce To: Whittaker, Bruce; Tibbits, Chad Cc: Langley, Kristen; West, Larry Subject: RE: Wehrman L04POO27: Conditions Attachments: WehrmanCond.doc Chad, Please see my revised conditions attached, I changed on word in the road conditions —Road A from subcoilector to subaccess road. Thanks, Bruce W From: Whittaker, Bruce Sent: Wednesday, June 21, 2006 9:29 AM To: Tibbits, Chad Cc: Langley, Kristen; West, Larry Subject: Wehrman L04POO27: Conditions Chad, Please see my proposed conditions attached. Kris: 1 folded your draft walkway conditions into this —OK? Thanks, BW 06/21 /2006 Bruce Whittaker 6/21/2006 Wehrman L04P0027 Proposed Conditions The drainage detention facility shall be designed to meet at a minimum the Level 2 Flow Control and Basic Water Quality menu in the 1998 King County Surface Water Design Manual(KCSWDM). 9. Storm drain stubs for future connection shall be provided along the west property line in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006; unless otherwise approved by DDES. 10 The applicant geotechnical engineer shall provide recommendations for the design and construction of the proposed site grading, road design, rock or retaining walls and drainage detention facility design. The geotechnical engineer shall evaluate the site for potential groundwater seeps and provide design recommendations to address groundwater found. The geotechnical recommendations shall be included in the T.I.R. and incorporated into the design with submittal of the engineering plans. 11 Special geotechnical construction inspection of the site grading, road construction, rock or retaining walls and drainage facility, is required to ensure compliance with the geotechnical recommendations. Inspection reports shall be submitted to the assigned Land Use Inspector during the construction phases of those facilities. A final construction report shall be submitted verifying compliance with the geotechnical recommendations. 12 The following road improvements are required to be constructed according to the 1993 King County Road Standards(KCRS): a. Road A shall be improved at a minimum to the urban subaccess street standard. A temporary turnaround shall be provided at the south end of Road A. This improvement shall be designed in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006; unless otherwise approved by DDES. It is intended that this improvement will match the proposed road improvements for the plat of Flueve De Voiles File L04P0002. b. FRONTAGE and OFFSITE: The frontage and offsite portion of SE 188"' Street from the west boundary, west to the existing road pavement, shall be improved at a minimum to the urban '/2,-street standard. This improvement shall be designed in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006. Other designs for this frontage and offsite improvement may be considered, as approved by DDES. C. Offsite Walkway Improvements: These walkway improvements shall be designed in general conformance with the conceptual school walkway plan submitted April 19th, 2006, unless otherwise approved by DDES. These improvements shall include any necessary grading and storm drainage work necessary to either tight -line the abutting roadside ditches or relocate the ditches within existing right-of-way. SE 188th Street (I20th Avenue SE to match into the above 1/2- street improvement near the west plat boundary)shall be widened to provide an eight (8) foot wide paved shoulder along the south side of the street. SE 188th St(116th Ave SE to 120th Ave SE) shall be widened to provide a minimum 16 feet wide paving as measured from the construction centerline. This will provide an 11-foot wide travel lane and a 5-foot wide paved shoulder. 1201h Ave SEISE 188th St to SE 184" St.) shall be widened to provide a minimum 16 feet wide paving as measured from the construction centerline. This will provide an 11-foot wide travel lane and a 5-foot wide paved shoulder. Modifications to the above road conditions may be considered according to the variance provisions in Section 1.08 of the KCRS. Drainage Narrative This site is located in the Soos Creek Drainage Basin The site drainage generally sheet flows from west to east, entering the Tract C wetland. The flow continues through the wetland entering Soos Creek just east of the site. The site is in a Level 2 Flow Control area and Basic Water Quality area per the 1998 KCSWDM. The Level 1 Offsite Analysis did not identify any downstream drainage problems that require further mitigation beyond these requirements. A preliminary grading and storm drainage plan was submitted by the applicant. Page 1 of 1 Whittaker, Bruce From: Langley, Kristen Sent: Tuesday, June 20, 2006 4:37 PM To: Whittaker, Bruce Subject: Wehrman_Walkway_plat,doc Attachments: Wehrman_Walkway_pEat.doc 06/21 /2006 Off -site school walkway improvements: SE 188th Street 0201h Avenue SE to subdivision boundary): All school age pedestrians SE 188t' Street shall be widened from the subdivision boundary to the intersection of 1201h Avenue SE to provide an eight (8) foot wide paved shoulder along the south side of the street. SE 188'h Street (116`' Avenue SE to 1201h Avenue SE) and 120`h Avenue Southeast (SE 188"' Street to SE 184th Street) Walkway for Middle -school and High School Students Widen in accordance with the conceptual school walkway plan submitted April 19`h, 2006 at specific locations along these two roadways. These improvements shall include sufficient additional paving (varying between 4 to5 feet, typically) to provide a minimum of 16-feet of paving as measured from the current construction centerline. This will provide an 11-foot wide travel lane (eastbound on SE 188`h, northbound on 120`h Avenue SE) and a five (5) foot wide paved shoulder. This will include any necessary grading and minor storm drainage work necessary to either tight-Iine the abutting roadside ditches or relocate the ditches within existing right-of-way. Bruce Whittaker 6/20/2006 Wehrman L04P0027 Proposed Conditions The drainage detention facility shall be designed to meet at a minimum the Level 2 Flow Control and Basic Water Quality menu in the 1998 King County Surface Water Design Manual(KCSWDM), 9. Storm drain stubs for future connection shall be provided along the west property line in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006; unless otherwise approved by DDES. 10. The following road improvements are required to be constructed according to the 1993 King County Road Standards(KCRS): a. Road A shall be improved at a minimum to the urban subcollector street standard. A temporary turnaround shall be provided at the south end of Road A. This improvement shall be designed in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006; unless otherwise approved by DDES. It is intended that this improvement will match the proposed road improvements for the plat of Flueve De Voiles File L04P0002. b. FRONTAGE and OFFSITE: The frontage and offsite portion of SE 1881n Street from the west boundary, west to the existing road pavement, shall be improved at a minimum to the urban %-strect standard. This improvement shall be designed in general conformance with the Preliminary Grading and Storm Drainage Plan received April 19, 2006. Other designs for this frontage and offsite improvement may be considered, as approved by DDES. C. OFFSITE Walkway Improvements: d. Modifications to the above road conditions may be considered according to the variance provisions in Section 1.08 of the KCRS. Drainage Narrative This site is located in the Soos Creek Drainage Basin The site drainage generally sheet flows from west to east, entering the Tract C wetland. The flow continues through the wetland entering Soos Creek just east of the site. The site is in a Level 2 Flow Control area and Basic Water Quality area per the 1998 KCSWDM. The Level 1 Offsite Analysis did not identify any downstream drainage problems that require further mitigation beyond these requirements. A preliminary grading and storm drainage plan was submitted by the applicant. CITY OF RENTON PlanningBuilding/PublicWorks Department Kathy Kealkrr Wheeler, Mayor Gregg Zimmerman P.E., Administrator March 3, 2005 King County Department of Development & Environmental Services Land Use Services Division Attn: Kim Claussen 900 Oakesdale Avenue Southwest Renton, WA 98055-1219 SUIMCT: NOTICE OF APPLICATION, L04P0027 — WEHRMAN SUBDIVISION Dear Ms. Claussen: Thank you for the opportunity of reviewing and commenting on this project proposal. Renton's Planning/Building/Public Works Department comments are as follows: I. The proposed project is within the Soos Creek Water & Sewer District. 2. The proposed development is within Renton's Potential Annexation Area. Therefore, we request that new streets within the development site be constructed to City of Renton standards. Sincerely, I Gregg Zimmerman Administrat or Planning/Building/Public Works Dept. cc: Neil Watts Jennifer Henning Lys Hornsby Sandra Meyer 1055 South Grady Way - Renton, Washington 98055 10RE N T O N This paper contains 50 / recycled maladal, 30 % post o nsumer AHEAD OF T H E C U R v g BOULEVARD LANES PARK PHOTO EXHIBIT Wehrman Preliminary Plat King County, Washington Submitted to: King County Department of Development and Environmental Services Land Use Services Division Submitted by: Trinity Land Development, L.L.G. Prepared by: Barghausen Consulting Engineers, Inc. December 10, 2004 Our Job No. 11418 KA d 0`4 l?") z 9--' / ON 0 i Q4G C�L CIVIL ENGINEERING, LAND} PLANNING, SURVEYING, ENVIRONMENTAL SERVICES m ? 18215 72NDAVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX BRANCH OFFICES ♦ OLYMPIA, WA • TEMECULA, CA ♦ WALNUT CREEK, CA s °< www.barghausen.com TANG EN G'H�W 44 Y' it � °� �:fSl 1 �:, � 1 • k,.' .. �i ��� �r . e �"+�y rr �; �'�� . .•ham' i � bi'a1 ;y 41k _ OAK .��./•.`.. t r \ Photo 5: Looking west at the entrance of Boulevard Lanes Park (December 3, 2004). Photo 6: Children's playground in Boulevard Lanes Park (December 3, 2004). CoiAAV �* PHOTOGRAPHS December 3, 2004 1i4V►�¢, 1t418.011.doc Photo 7: Basketball court and grass field in Boulevard Lanes Park (December 3, 2004). Photo 8: Restrooms located in Boulevard Lanes Park (December 3, 2004). 14 A v � W z PHOTOGRAPHS o_. December 3, 2004 4 ���► 11418.011.doc (t ££P h'� erlu L04P0027 Bruce Whittaker DDES/LUSD MS OAK-DE-0100 OFFICE OF THE HEARING EXAMINER KING COUNTY, WASHINGTON 400 Yesler Way, Room 404 Seattle, Washington 98104 Telephone (206) 2964660 Facsimile (206) 296-1654 NOTICE OF HEARING June 28, 2006 SUBJECT: Department of Development and Environmental Services Nile No. L04P0027 Proposed Ordinance No.2006-0295 WEHRMAN SUBDIVISION Preliminary Plat Application Location: South of Southeast 188th Street, west of 124th Avenue South Applicant: Trinity Land Development Attn: Chris Austin 310 --- 29 Street Northeast Puyallup, Washington 98373 Telephone: (253) 845-2922 King County: Department of Development and Environmental Services, represented by Chad Tibbits 900 Oakesdale Avenue Southwest Renton, Washington 98055 Telephone: (206) 296-7194 Facsimile. (206) 296-7051 A public hearing has been scheduled on this proposal for 10:30 a.m. on Tuesday, July 25, 2006, in the Department of Development and Environmental Services Hearing Room, 900 Oakesdale Avenue SW, Renton, Washington. Any primary party wishing to reschedule the hearing for a different time or location must make a request in writing to that effect and must obtain the written concurrence of all other primary parties, which shall be submitted to the Hearing Examiner's Office at the above address within 7 days of the date of this notice. Primary parties include the applicant, property owner, and responsible County agency. (Other persons likely to be directly and substantially affected by County action on this proposal may request "party" status by submitting an intervenor petition to the Hearing Examiner_) Agreement to reschedule this proceeding shall constitute waiver by the parties of procedural time limits for its occurrence. A pre -hearing conference may be requested by any primary party prior to July 11, 2006. Hearing Examiner Rule VIII, which is included with this notice, governs pre -hearing conferences. If you are a party to this proceeding and believe a pre -hearing conference should be held prior to the public hearing, submit your written request with specific reasons in support thereof to the King County Hearing Examiner. To promote efficiency in the conduct of hearings and to eliminate surprise, pre -hearing exchange of information is encouraged by the Rules of Procedure. Any person is entitled to receive, at cost, copies of L04P0027—Wehrman Subdivision Page 2 of 3 documents in the County file. Application may also be made to the Examiner to direct exchange of other significant information by any person or agency. Mediation of disputes is available pursuant to King County Code Section 20.24.330 and Rules of Mediation. Please contact the Office of the Hearing Examiner if you need a copy of the Rules of Procedure or Rules of Mediation, or obtain the Rules by visiting our web site at www.metroke_gov/n*cc/hearingexaminer. ORDERED this 28th day of June, 2006. Peter T. Donahue, Deputy King County Hearing Examiner TRANSMITTED this 28th day of June, 2006, to the following parties and interested persons: Matt Berntson Annete Ervin Thomas Goff 12040 SE 188th St. 18849 - 120th Ave. SE 18701 - 126th Pl. SE Renton WA 98058 Renton WA 98058 Renton WA 98058 Ivana Halvorsen Fred A. Heistuman Seattle KC Health Dept. Barghausen Cons. Eng., Inc. 18819 - 120th SE E. Dist. Environ. Health 18215 - 72nd Ave. S. Renton WA 98058 14350 SE Eastgate Way Kent WA 98032 Bellevue WA 98007 Trinity Land Development LLC Marvin Wehrman Kim Claussen Attn: Clark McGowan 5115 - 33rd Ave. W. DDES/LUSD 310 - 29th St. NE Everett WA 98203 MS OAK-DE-0100 Puyallup WA 98372 Lisa Dinsmore Nick Gillen Kristen Langley DDES/LUSD DDES/LUSD DDES/LUSD MS OAK-DE-0100 MS OAK-DE-0100 MS OAK-DE-0100 Carol Rogers Chad Tibbits Steve Townsend DDES/LUSD DDES - LUSD DDES/LUSD MS OAK-DE-0100 MS OAK-DE-0100 MS OAK-DE-0100 Larry West Kelly Whiting Bruce Whittaker DDES/LUSD KC DOT, Rd. Srvcs. Div. DDES/LUSD MS OAK-DE-0100 MS KSC-TR-0231 MS OAK-DE-0100 NOTE: If the Renton School District announces a district -wide school closure due to adverse weather conditions or similar area emergency, the proceeding on this matter will be postponed. Parties of record will be notified of the time and date of the rescheduled proceeding. Any questions regarding postponements and rescheduling can be directed to the Hearing Examiner's Office at (206) 296-4660. Sign language and communication material in alternate formats �S can be arranged given sufficient notice at :'■':: 296-1000 (TDD number 296-1024). PTD:gao L04P0027 NOT Attachment RULES OF PROCEDURE OF THE KING COUNTY HEARING EXAMINER Rule VIII. PRE -HEARING CONFERENCES A. Purpose and Initiation Pre -hearing conferences promote efficient case management by providing an informal process for early identification of issues and resolution of procedural matters in complex cases. Evidence generally will not be received at a pre -hearing conference, except when required in order for the examiner to rule on a motion. (Pre -marking and introduction of exhibits to which there is no objection may occur at the discretion of the examiner.) The examiner, on motion of any party or upon his/her own motion, may convene a pre -hearing conference to: Identify, clarify, limit or simplify issues. Hear and consider pre -hearing motions_ Schedule hearings, identify parties and witnesses, determine the order of and limits upon testimony, obtain stipulations as to facts and law, identify and admit exhibits, order discovery, and consider and act upon any other matter which may aid in the efficient disposition of the hearing. B. Requests for Conference A motion to convene a pre -hearing conference shall be made to the examiner as soon as the need for a conference is recognized by the moving party (at least 21 days prior to the scheduled hearing date), and shall state the reasons for the request, including any motions to be presented_ For good cause stated in the motion, the examiner may consider a request that fails to meet the 21-day requirement. For hearings authorized under KCC 20,24.080, a motion by any party for a pre -hearing conference shall be granted if timely. However, unless consented to by all parties or otherwise ordered for good cause by the examiner, no pre -hearing conference on an appeal can be convened later than 45 days after receipt of the statement of appeal by the hearing examiners office. C. Proceedings at Conference A party who has received timely notice of a pre -hearing conference shall identify at the conference any pre -hearing motions not previously made which he/she intends to make. Parties or interested persons may also file timely written pre -hearing motions for consideration at the pre -hearing conference. Failure to make or disclose a motion which was available to the party at the time of the conference maybe grounds for its denial if subsequently made. D. Pre -hearing Order Following a pre -hearing conference, the examiner shall issue an order specifying all items determined at the conference. The order shall be binding upon all parties and interested persons who received timely notice of the conference. Revised March 31, 1995 DIRECTIONS TO DDES HEARING ROOM 900 OAKESDALE AVE SW, RENTON SOUTHBOUND I-5 • EXIT 157 — Martin Luther King Way • Turn RIGHT onto 68" Ave. S. 6e Ave. S. becomes MONSTER RD. SW Monster Rd turns into OAKESDALE AYE SW DDES is on your left (building 900) NORTHBOUND 1-5 EXIT 154 to I-405/WA-518/Burien/Renton • Stay right to 1-405/Renton/Bellevue 1--405 EXIT i to WA- 181lW. Valley Hwy. LEFT onto W. Valley Hwy/SR 181 • RIGHT onto East Grady Way LEFT onto Oakesdale Ave. SW DDES is on your right (building 900) NORTHBOUND SR 167 • Northbound under the I-405 overpass • LEFT at SW 7'h St. (2"a light) LEFT onto Oakesdale Ave. SW DDES is on your left (building 900) SORTHBOUND I-405 EXIT 2 to WA-167/Auburrt/Ralnier Ave. • Follow to SR-167 (Valley Fwy.) north LEFT onto SW Grady Way RIGHT onto Oakesdale Ave. SW DDES is on your right (building 900) NORTHBOUND 1-405 EXIT I to Interurban Ave. SlWest Valley Hwy • LEFT at light at ramp bottom (north under I405) • RIGHT onto SW Grady Way LEFT onto Oakesdale Ave. SW DDES is on your right (building 900) SW 7' SITEEr H 0 SW GRADY WAY E S G:Iworking\MisclHex\DDt S directions.doc LEVEL 'I OFF -SITE DRAINAGE ANALYSIS AND ' PRELIMINARY DETENTION SIZING CALCULATIONS Proposed Wehrman Property Plat ' NWC — 124th Avenue S.E. and S.E. 192nd Street King County, Washington 1 Prepared for: Trinity Land Development, L.L.C. 315 — 39th Avenue S.W., Suite 6 Puyallup, Washington 98373 December 2, 2004 Revised November 9, 2005 Our Job No. 11418 �g X JAC0� Y..a; to*J01, EYPI;"es 10i10f CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES m x 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX BRANCH OFFICES ♦ ❑LYMPIA, WA ♦ TEMECULA, CA ♦ WALNUT CREEK, CA www.barghausen.com �rN6 ENGtd4'�N Y 1 1 LEVEL 1 OFF -SITE DRAINAGE ANALYSIS AND PRELIMINARY DETENTION SIZING CALCULATIONS 'Q. &t4AV'o R? Z s 2 TANG FNG�x�E Proposed Wehrman Property Plat NWC — 124th Avenue S.E. and S.E. 192nd Street King County, Washington Prepared for: Trinity Land Development, L.L.C. 315 — 39th Avenue S.W., Suite 6 Puyallup, Washington 98373 December 2, 2004 Revised !November 9, 2005 Our Job No. 11418 EY.PIRFS 10/10/ CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX BRANCH OFFICES • OLYMPIA, WA ♦ TEMECULA, CA • WALNUT CREEK, CA www.barghausen.com 1 1 1 1 1 1 1 1 1 1 1 1 1 1 TABLE OF CONTENTS TASK 1 STUDY AREA DEFINITION AND MAPS EXHIBIT A Vicinity Map EXHIBIT B Downstream Drainage Map EXHIBIT C Upstream Basin Map TASK 2 RESOURCE REVIEW EXHIBIT D FEMA Map EXHIBIT E Sensitive Areas Folios EXHIBIT F SCS Soils Map EXHIBIT G Assessor's Map EXHIBIT H Wetland Inventory Map EXHIBIT I Basin Reconnaissance Summary Report TASK 3 FIELD INSPECTION EXHIBIT J Off -Site Analysis Drainage System Table 3.1 Conveyance System Nuisance Problems (Type 1) 3.2 Severe Erosion Problems (Type 2) 3.3 Severe Flooding Problems (Type 3) TASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS EXHIBIT K Drainage Complaints TASK 5 MITIGATION OF EXISTING OR POTENTIAL PROBLEMS EXHIBIT L Detention Sizing Calculations APPENDIX 11418.008.doc [JPJ11ep] TASK 1 ' STUDY AREA DEFINITION AND MAPS TASK 1 STUDY AREA DEFINITION AND MAPS ' The proposed Wehrman property plat is approximately 7.2 acres located within a portion of the Southwest quarter of Section 33, Township 23 North, Range 5 East, Willamette Meridian, King County, Washington. More particularly, the site is located on the south side of S.E. 188th Street and west of the 124th Avenue S.E. extension. The enclosed Exhibit A — Vicinity Map depicts the approximate location of the proposed site. The existing topography of the site has slopes ranging from 5 percent up to almost 40 percent. A Bonneville Power Administration (BPA) transmission easement lies on the eastern portion of the project site and then diagonally bisects the northeast corner of the project site. Soos Creek and a large wetland area lie approximately 200- to 300-feet east of the project site. The area immediately west of the project site consists of existing residential developments. The existing conditions of the project site are such that most of the site is forested or brushy. The proposal for this development is to construct 34 lots with all lots being accessed from S.E. 188th Street. Drainage facilities are proposed to be constructed along the eastern property line of the site adjacent to the existing wetland buffer. Elevation difference across the site is approximately 90 feet vertical difference with elevations at the far west end of the site ' around 468, and elevations at the far east property line around ±376. UPSTREAM DRAINAGE ANALYSIS Based on the USGS quad map and our site visit, it appears that there is upstream flow onto and through the site. Portions of the area lying west of the project site sheetflow through adjacent properties onto the ' project site. In addition, portions of the area west of the project site drain into S.E. 188th Street ditches where it is conveyed to the northwest corner of the project site, and then sheetflows to the north of the property down a steep slope under existing conditions. The total upstream basin is approximately 5 acres. I11418.008.doc [JPJ/tep] 77 L EXHIBIT A Vicinity Map 11 f' 1 _ Y � sE t77rx sE P - �ITsty G nzTx m PAU RlDF 51 178111 L FS T SE 180TH T SE - n z 184TH S7 ' ` q PL r dF Is2 Ra sir" � se telst sr w { ° '` SE 179TH SE 182ND IF _ 181s1 vt SE ---- 181ST ST Za"� �� sTN ITS s SE left SE IffilaD ST E JJ x - 5 1H411T 13 U CY SL SE 184Tk LU ti St �tt s 1aj w � � S � SE 186TH ST se1897H 1DarH n F LI) 34 SE 1 sF 187IH TH PL �t c 1H Sr w p.� ..." - e aE SF I PL S7 a `3' +SSE 166TH si m� sv 1961N Pt �, � S 185TH a ..r r SE 187TH ST U L 188FH T SE FaHt ✓ o sr seml IBTTM� S� 75{ SE 188Ty NY SE 186TH ST v+ E a' �I ���/J�/j]j It 1b9i1L 5? vt to SE 188TH PL It . •-rim "�' S 1' JE SE L P TH ✓){Fj�-F�� a � SE € 9m PL sf ` ¢ SE 190TH ST ;8 n A Rs �q£� ST L [9lSTE SE 192 ST �'� T23N 11500 124 0 PARKS SE 193RD sT y 14200 w w RIDE rr -cF FL ST v S� ST SE 195TH ST 53 1yE oaC w ,by1951N q6 V E 1%TSL' H SE 197TH N� ST SE ]97TH PL w E2 %TH W 1 d `^' sE 191 1H PL 't ^� Ai5£ E16 H Isg SE k97TH Ir SF 198TH SS E NI £t sr t9et SF�Ix SE 19enL PL 1� c': l 5C I98TH si 71H SF 1 49 P4! +� si 19 Li Cy TH sr =� I t N -ST T to �.�xagy!� ; °j � a, r � 201sT E 1,01ST a� fad r SE 2 ST i s ` r T ,,� SE SE 202N0 PL R SE 2D2N0 SF �' SE 203RD nr 520W ST J SE r ST..I 2D7RD Pi lT SE '� '~ SE 204TH PC J a Eq sc zos �x zosm{� £ sT - '" o ,�\ ff al } _.SEA PL 204TH 4` � ST v � n 4w •k tj--Is[ za5m Pt SE 2067H TrH0 PL 2j w ST s : KEN7RIf1GE HS t -PT-� i sE 207TFi .. -- �2 PL ^ Z TH ST o SE 09TH '�. rx 12700 13200 74000 SE__ _ 2061H _-ST_-- ., SE 2 fSTH� Ss[xs. K st a ✓¢ - 14AD0 ,'"",a 209THa rr ._ I - 210TH 'u" PL o SE 2I -WSloTR orx TN e,r [r � rz N Si W 'a - S y [n . M h 2kim a Pl SE N 211 [/7 r11H ?H SE 21jM Ci o M 212TH p� 2Zm �" PL S[ 212TH SE 2S27H sT E 212TH ST SE 212TH N m SE ZtytN SA ti z SE 213TH IT PL m SE Ry s� "4F 2tm1 N s`a V f'f. SE Z14TH PL Nis 2L3TH $T L s< zt sr N zts ? g N4TH Vr 77 rrTT SE 2 4TH ST SE fP1 216TH sl ST SE 217TH ST z SF 2161H s SE et 13200 Sr l V 216TH — F - k e zt c� x sFM.:: tl�ttn fr�E 21,17!zlrnr �' .. ~217T� } w'a F '^ n SE 21BTH 9L <' 3 218TH_r M1�'y 4 PL ytv �. n ", ti� - SE PL 7 Q o ztgrx 219TN Pt ry n& _ i i'� f'9� Ce ^ PI y a Q ST n" Pt SI °ice__. x SE 220TH ST f 219Tx ti H Y2pTl ST n J M H ^ PL N �' SE 220TH ST S( y w NZ SE a e. _ „ s� 2215 v 22 .-. SF 4! t SE 222NH ST N 4 SE Pi t Q 11 z Y sE H� 1 �S8 L T '� ✓ J o � x w SE 224TH a ST SE 224 H sr VICINITY MAP A NORTH �( Tiv,mAE Vuin +USED BY PERh.4IssIuN1 11 EXHIBIT B Downstream Drainage Map 1 fl I s • s , 1 i I i + • I r F ` F I F I • x J F • 13 y r ML 8Ul? ■ MIN r • • do r • • ■ ■ r ■ r ■ N. a ■ • ■ • 'low• • • r r ■ • • • ■ ■ ' • ■ r ■ ■ • • r i • , • r � _ 1 • i ' • • s •' • . • ' ! • ■ ■ • ! • ■ r■ r �! ♦as M a■• � Q • h 1, t 3 • r � . � r• t ■ • •r, ! ■ ■ rr ter- ■■ram �� � �iii` i■� i • r � � . f , ' EXHIBIT C Upstream Basin Map x 3L� a r r a ■ • I + f ■ ■ ■ r / f O ■ f ^t I � ! r � ! ■ ! • k� ! y ! r 41 ■ I E s �y+� I ~ � ' Big Mi,- a � ■ Ch ■ r ■■ ■ • a ' � i '•a ■ ' r + ■ r a , r ■ r • ■ a • • H • r •• ■ r e ■ ■ . 3 J ■ ,0 • k all ■ r r • n At jab 0 LO d r ■ r r , ■• r • r `r ■ ■ ■ ■ ■ ■■ L ■ ■ a 1 � ■ E ■ ■ ■ I+• r ■ a ■■ 4 TASK 2 RESOURCE REVIEW ITASK 2 RESOURCE REVIEW I • Adopted Basin Plans: The site is part of the Soos Creek Basin. • Finalized Drainage Studies: This is not applicable. • Basin Reconnaissance Summary Report: Once again, the site is located in the Soos Creek Basin. Part of the Soos Creek Basin Reconnaissance Summary Report is to construct a control weir at the bridge on S.E. Lake Young's Way. This project should be justified by a future basin plan. It is not known at this time if that weir is constructed; however, this weir is approximately 1 mile downstream from the proposed project site. • Critical Drainage Area Maps: According to the Water Quality applications map and the 1998 King County, Washington Surface Water Design Manual (KCSWDM), Basic Water Quality treatment is required. According to the flow control applications map, also in the KCSWDM, Level 2 Flow Control is required as a minimum. • F000dplain and Floodway FEMA Maps: Please see the enclosed Exhibit D -- FEMA Map utilized for this analysis (Panel No. 991 of 1,725, Map No. 53033CO991 F, revised May 15, 1995). As indicated by this map, the proposed project site does not Iie within a floodplain or floWway of a stream; however, Soos Creek lies 270 feet east of the project site and does have a floodplain associated with it. However, it does not encroach on the project site. • Other Off -Site Analysis Reports: A review of Exhibit I — Basin Reconnaissance Summary Report and a site investigation were conducted in preparation of this Level 1 Drainage Analysis. The United States Department of Agriculture Soils Conservation Service Map is also provided. See Exhibit F — SCS Soils Map. • Sensitive Areas Folios: Rased on our review of the King County Sensitive Areas Map Folios, it was found the subject site does lie within a sensitive area, which is an erosion sensitive area. Also, a wetland is located immediately east of the project site, in addition to Soos Creek that is also a sensitive salmon -bearing stream. • Road Drainage Problems: This is not applicable. • United States Department of Agriculture King County Soils Survey: Based on the soils map for this area, the entire site is located within Alderwood type soils. • WetIand Inventory Maps: The Exhibit H — Wetland Inventory Map for this area is included herewith. Soos Creek is coursing through wetland along almost its entire downstream drainage course. However, immediately adjacent to the site, there is no mapped wetland as indicated by Exhibit H -- Wetland Inventory Map, even though there are wetlands existing there. • Migrating River Studies: This is not applicable. II 141 S.008.doc [JP)Itcp] r x� 4 z � m W� b I y LU '.� ^ O o C* ih N � w Q 44 !-� W twD z � �� �� b r� Z Q a ca p = u'p s w CD � -� O d LJ = UZ� "W 4 °° 0 ocn a H o cm �} � � a W ZU W �� oa 4 ,W Z 2 "Z ,14T AGp, "G L` Fes! 1,,,{ i+? O� y Cfu L U c+v �'t i'v h c m� ;am � roc 922-�� oRmoR cq mc� ON Eon p E C a $ C II d ° II - J C LL Z W -0 41m a L r a a o" » a m a o m m a O N4 N .O w in Q m n O II W Vl o II V > O >N N m �o R N ,� ow wQ %ate O. EE IU N v a > d p C (K 04 IL w a C m a i7 > IS.i b II ` R C N n 7 C W L Z m y Eo` m v o o m m L - a n` 3 3 d ar m s C o = U o a m o o ° p G C dl a LL a q 'E o �c o O a Z < w$ o vv c.c L� 2 c L o a /1 w 3 p v c m c ¢ v o o m G R a w' L a m w m y m _,Q„':. m w �2 0w 0 5a I¢i ¢� o¢ � a �v Q o n o o a o m y mo c m m n �cm m m C, tf) mnn •V -c u R °o�� :'p / �m o tl N coif] USN cow V c0 �++ w fL M: uH Q w O P W Q O w Q Z m m m Q 9 > �" X < x O c I c „ W W W c W ce W W 7 m ' Z Z Z O X Z = Z Z 11 m !� � v p Q O O O O O O O p N c w N N N O N Q N N Z N �' U v m m t` maccIn =mmx M a g° T I n c q'� v °` W a E e<7 v o a N m y V owl Eog S. acm ¢ M c 96 mC �m mmd zp a au� II a tL wra q c = c._ y maa an =oE c ° °? a m 8 act ¢ m cLL ��� m a la a c 'O w C.p O m «a. F w c m c� t p t a m 0 0-Y � S m m= m d W cmi m w 3 0 U Ea E a E a m Q c O m C P.0 O m C C Cml 4O vi 'b m C@ q Ill LU 4 tu OQ ��- olyr w mE _ �� IIm m FQ m U- o w oto: u LL W m �co o �__ _ 'Co' =d am m } a O V m Z 4 o zn _m OLL nmQ iuF O OJ l Q fAU �- oE° mv�o -�a - nmi �� v mmc o.- �� m ~ -C Q j Z 3 n�AL J 2 Q y m 7^ ._ '° t m m o o n E UJ h p Q m E ¢ E m E en- to O Z w (? Q W m Uy Wmm �m �' o m?m Ec n�> m.cc o°' m w j I jv� mW o _ m d Q = U m .7 °1 O W Z mmm mq�, o LL ; �v aea wE=v t n O FQ U, crm v_a` m� m�E UcEprmm c c 7 1- Q O La L �� QU p E•c cr u� m a v ca o f °' o Ew 3 o m - a O H c c p- N » vmi aRi m >m co ° m «' m .S m O ._ ° rn 4- a Q on II ti 1 Ir1 II m e ` m n m f ca O a Q = D T a m L C m m t E m m LL O U m m n> m o a -: E ?.cl E g 'c a 9 m o sn ti mck_LL r 4.� `op mo m uc Rim mmL mu m Em O U E W ienLn rLALr ]UU1HLA51 r m r= m m r = m m m m "_ r m m m m 1 5 I EXHIBIT E Sensitive Areas Folios �1 1 LAND'I_10E HAZARD AREAS 1 �4 NORTH S i{ KiwN C JUfJTY JEIIS;HvF NPLA S FOLIO I 1 AREAS41 V4 (`��, NORTH �E�. yd I I I I I I I I I I I I I I I I I STREAMS AND Fl." CI) HAZARD AREAS 0 KirjG COUNTY ?PEAS VAI(j A& NORTH -'--.f�j 11 EXHIBIT F SCS Soils Map I J ..-�K,`i�'�fk j� �� f T67C � I� .`fir ' 4� i • � � z"�•Y'. Ag e: fir• �"#.f'S Sk mw t r r ) '.ff �,-.. t�" l ,C. i$�• r., a _� --� 1 'x�r. 6 : �:�E +t� �}il �- ri�s ��h �~ xF .„ II _f r,•: � :F`. F ♦� Ss '• _ �7r iy�� "^ � '� - S �w �• x�' I W i•"• � gd �) �3 p pew � � 4 x� - v f' Age a A' ` X •S y a� r •`• '3 , $k L der F ``' tw a� �-lrp, � �: Uf. I II Y AImp:- --- ak - ~AgC k. Ami6 �• $k �z.a e- �nl Agg AgC A C` I y. ' Am6 g AgB AgG • InC o AgC I Ted c 4 5') ; : • Ev$ Ev8 No R9c Ur kkF AmC V. No AI Sk No E : e n CAM& A J!TA6: gg$UCG.i EVC _ [�� 'F � § � � Sk q AgC • � D i,4� -- --- ` NQ SID s' Ag4 viz Na , No AF 6. SOILS MAP NORTH �I 5 u EXHIBIT G Assessor's Map 1 r, SE 14VH FL ua,l mac. e 's �n s 619780 02fi1 Ylrl 619780 -0ODDi- - mD6a- - 0260 M•T aiT Yuan Pdn,l ,n pRy� Pa,.�1 ' ,6197 J6197 a �61978&• N6197 i1978; 80-0286;-0285_70284- -00002- na n -0OOU]- d00R2- Ra loom- j 619960 I 0100 g & 619766-0300 a 00001- - 619960 T i n s199s0 0160 a 619960 1.9780 0140 -06001- i 619960-0130 -WW1- o� sa r� 0 1 = s1978a _ , I i i IM2- 431$ c $1 1s i -00OOf_ -00001- ' n»m n»sT mu, wan j va.:n u� J Ij c 619780 1619780 N 0340 = 0320 019700 T0323"_0324s 1 1996 120 a0*1 » 4XKXK2_ -0$ou2- �ww nu, i I uti wrt W..n � w•T ma, nun nl,ln na.rr, muo 1 i nRl wsln n•n, in.v, fsa4 a0201 iee4l s (0203!x ` E819640 jE0205 A _ a0202,s I fil aw,o . z a� 931 i0023� 0199M § 0099 , 0 a 619900 0218 as a� r.+ozn np 0060 li++a} �i 61964a-0Y04 £ j I a I,u.u} rnntn a t � 900a2- I 8 $IBB09-9R2a ILL,03, $1990a0025 w IRoIY Ix n:m, 619900 n«m Rw�n 019840-0222 1 -0oom- 61904D-0200 If j E .8, B900.W26 o 61990a -0021 0100 _z. E 619900 1401 9 s1984 619640-0245 0069 0241 Rau nm,n i s 619900-0040 p_ nio� ?- '•0002- $iW�-44 l5, $1 � i2 i s19900 - f00 n s ; , 0050 _ IaLt„ j µ,sm 4. 61990040 6194X=2- i i e 619900-0041 @ 0080 I 332305-9039 (0.96 Ac.) 332305 9073 (4.03 Ac. ) 17■IL11 I $149000120 % 1 j 619840-0280 6199oo E5 6199oo € ' 0°0D2- " 619900-0125 = 0126 - 0127 = f �+ I { _ i wean n+wa„ t•nan ns.a„u' noun 619844-0300 -0OD02- a : _! # 6199a0 = 0141 819900 0142 a s1990D 6199009C 0210 3 al 0186 - I OL 411 Wn, _ nb_nry �f 619840-0320 j nb,T 6199Q0 k619900-014 i i ., a 619900 ! ^ 619900 g 0205 R ' -°DDD2- i = 0140 9 - 0185 e i i m 1 na.x, 01Y -0200 1 I a 619900 wl p�s ' _ r.. � { a164 „ 81990091$3 ` a II I I I I — ✓• 7 I 1 J ^ � 619840 a 619840 j 1 99QQ ;,..n � s1396 1 ` r ! �.:."3. 0341 s 034o j $r.� �j n:_ .; a 14 , E i -OOW2- -DD002- i j "O E ° 619900 _ �0215 s19900 _ i I = j i - _ 0180 0182 — - 4 ASSESSOR'S MAP ' N 0 R T H EXHIBIT H Wetland Inventory Map Slack River Lower Green River Mile TN 0 YZ t Lower Cedar River Middle Green River Jenkins Creek Covington Creek . Soos Creek Green River Basin 1� EXHIBIT I Basin Reconnaissance Summary Report n �u 1 RECONNAISSANCE REPORT NO. 2 SODS CREEK BASIN IJANUARY 1986 ' Natural Resources and Parks Division and Surface Water Management Division King Countv. Washington 1 1 1 King County Executive Tim Hill King County Council Audrey Gruger, District 1 Cynthia Sullivan, District 2 Bill Reams, District 3 Lois North, District 4 Ron Sims, District S Bruce Lain& District 6 Paul Barden, District 7 Bob Grieve, District 8 Gary Grant, District 9 Department of Public Works Don LaBelle, Director Surface Water Management Division Joseph J. Simmler. Division Manager Jim Kramer, Assistant Division Manager Dave Clark, Manager, River 8c Water Resource Section Larry Gibbons, Manager, Project Management and Design Section Contributing Staff Doug Chin. Sr_ Engineer Randall Parsons. Sr. Engineer Andy Levesque, Sr. Engineer Bruce Barker, Engineer Arnv Stonkus, Engineer Ray Steiger, Engineer Pete Ringen, Lngineer Consulting Staff Don Spencer. Associate Geologist. Earth Consultants. Inc. John Bethel. Soil Scientist. Earth Inc. P:CR Planawlt and Resources Joe Nagel, Director Natural Resources and Parks Division Russ Cahill. Division Manager Bill Jolly, Actin- Division Manager Derek Poon, Chief, Resources Planning Section Bill Eckel. Manager, Basin Planning Program Contributing Staff Rav Heller, Project Manager S, Team Leader Matthew Clark, Project Manager Robert R. Fuerstenberg, Biologist R Team Leader Matthew J. Bruengo, Geologist Lee Benda. Geologist Derek Booth, Geologrist Dvanne Sheldon, Wetlands Biologist Cindy Baker, Earth Scientist Di Johnson, Planning Support Technician Robert Radek, Planning Support Technician Randal Bays, Planning Support Technician Fred Bentler. Planning Support Technician Mark Hudson. Planning Support Technician Sharon Clausen. Planning Support Technician David Truax. Planning Support Technician Brian. Vanderburg. Planning Support Technician Carolyn M. Byerly, Technical Writer Susanna Hornig. Technical Writer Virginia Newman, Graphic Artist I�larcia McNulty, Typesetter Mildred Miller, Typesetter Jaki Reed, Typesetter Lela Lira, Office Technician Marty Coy:, Office Technician 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 TABLE OF CONTENTS 1. SUMMARY 1 II. INTRODUCTION 1 III. FINDINGS IN SODS CREEK BASIN A. Overview B. Effects of Urbanization 3 C. Specific Problems 4 1. Bank failures 4 ?. Channel erosion 4 3. Flooding and potential flooding 4 4. Stream habitat 4 IV. RECOMMENDATIONS 5 A. Inform appropriate governmental agencies of S the reconnaissance findings B. Reevaluate specific surface water management 5 policies C. Prepare a comprehensive basin plan 6 D. Construct the capital improvement projects 6 I. Maintain or enhance instream and riparian habitats 6 V. MAP 7 APPENDICES APPENDIX A. Estimated Costs A-1 APPENDIX 13: Capital Improvement Project Ranking B_1 APPENDIX C: Detailed Findings and Recommendations C-1 fl L CRY The Soos Creek Basin is located north and east of the Green River in King County. While the southern and eastern portions of the basin are rural, the remainder is a rapidly ' expanding suburban community. This development pattern has not caused serious environmental damage or flooding, however, due to highly pervious soils, an extensive network of streams and wetlands that provide natural storage for stormwater runoff, and the ' fact that development has only recently accelerated in this basin. Although the overall severity of problems in the Soos Creek Basin was not great at the time of reconnaissance, several significant problems were identified and should be addresse habitat d. ' These include bank failures, channel erosion, flooding in some locations, and poor stream ' Recommendations to address these problems include efforts to 1) inform appropriate agencies of the reconnaissance findings, 2) reevaluate specific policy moues re management of surface water, 3) prepare a eomprfehensive basin plan, 4) construct gthe e ' capital impravement projects evaluated with citizen advisory committee criteria, and 5) maintain or enhance habitat throughout the basin. >T- i I`RGDUCT[GN. History and Goals of the Program ' In 1985 the King County Council approved funding for ff Pp "r the Planning Division (now called the Natural Resources and Parks Division), in coordination with the Surface Water Management Division, to conduct a reconnaissance of 29 major drainage basins located in King County. The effort began with an initial investigation of three basins --Evans, Soos. and Hyiebos Creeks -- in order to determine existing and potential surface water problems and to recommend action to mitigate and prevent these problems. These initial ' investigations used available data and new field observations to examine geology, hydrology, and habitat conditions in each basin. ' Findings from these three basins led the King County Council to adopt Resolution 6018 in April 1986, calling for reconnaissance to be completed an the remaining 26 basins. The Basin Reconnaissance Program, which was subsequently established, is now an important element of surface water management. The goals of the program are to provide useful data with regard to 1) critical problems needing immediate solutions. ?) basin characteristics for use in the preparation of detailed basin management plans, and 3} capital costs associated with the early resolution of drainage problems. The reconnaissance reports are intended to provide an evaluation of present drainage conditions in the County in order to transmit information to poiicvmakers to aid them in ' developing more detailed regulatory measures and specific capital improvement plans. They are not intended to ascribe in any conclusive manner the causes of drainage or erosion problems: instead, they are to be used as initial surveys from which choices for subsequent ' detailed engineering and other professional environmental analyses may be made. Due to the limited amount of time available for the field work in each basin, the reports must be viewed as descriptive environmental narratives rather than as final engineen.no conclusions_ ' Recommendations contained in each report provide a description of potential mitigative measures for each particular basin: these measures might provide maximum environmental ' protection through capital project construction or development approval conditions. The appropriate extent of such measures will be decided on a case-bv-case basis by County officials responsible for reviewing applications for permit approvals and for choosing among competing projects for public construction. Nothing in the reports is intended to substitute ' P'SCB 1 Soos Creek Basin t(continued) ' for a more thorough environmental and engineering analysis possible on a site -specific basis for any proposal. M. FINDINGS IN SODS CREEK BASIN ' Reconnaissance in the Soos Creek Basin was conducted in November 1985 b Ray Heller, Y Y 1e r, resource planner, Randall Parsons, engineer, and Don Spencer and John Bethel, consulting ' soil scientists, Their findings and recommendations are presented as follows. A- Overview of Soos Creels Basin Geographic and land use features, The Soos Creek Basin is located north and east of the Green River in the eastern portion of the Soos Creek Plateau Community Planning Area. The basin is situated east of the city of Kent, northeast of Auburn, and ' southeast of Renton. The city of Seattle's Lake Youngs watershed is included in the Soos Creek Basin. ' The south and east portions of the basin are rural in character, with the north and west portions committed to a suburban development pattern that includes subdivisions and scattered single-family homes. The 1985 Kind County Comprehensive Plan shows areas east of Big Soos Creek (in the northern part of the basin) and south of Lake Youngs with rural development" designations that specify 1-5 dwelling units (DU) T) per acre. The southern area to the east of Soos Creek and north of the Green River is ' designated "transitional." This interim designation will limit development to rural - residential densities until such time as rural/urban designations are made through updated community plans. ' The King County Parks Department owns more than a five -mile stretch from Southeast 192nd Street to Lake Meridian, along Big Soos Creek. These presently undeveloped park lands are mostly wetlands and lie within the 100-year floodplain. Major geologic, hydraulic, and hydrologic features. The Soos Creek drainage area is a tributary basin to the Green River basin. The area is part of the Puget Sound lowlands and is characterized by a glacial drift plain, covered by small ridges and rounded hills that were formed by continental' Glaciation. While the Soos Creek Basin is moderately developed; the degree and amount of channel erosion, slope failures, and other forms of geologic and hydraulic damage are far less than might be expected. Artificial conveyances are also still functioning in this basin as thev were originally designed and intended. ' These conditions be may explained by three main factors. First. there is a very effective natural retention and detention (RID) systern provided by an extensive network of 52 wetlands and numerous major and minor streams. Most of the wetlands are located in the northern portion of the basin in the upland areas as well as adjacent to streams. Big Soos Creek originates in the northeast corner of the plateau and flows southeast to the junction of Little Soos and Jenkins Creeks, then curves west at its confluence with Covington Creek, Big Soos Creek joins the Green River east of Auburn near State Road (SR) IS at 160th Avenue SE. These wetlands and streams appear to be functioning, well as stormwater control facilities for the current levels of ' development, as well as sensing to prevent damage from surface water runoff, C) P:SCB Soos Creek Basin (continued) Second, the soils in the upland areas generally have a high infiltrative capacity, particularly in the southern portion of the basin. Stormwater is absorbed into the ground at these.locations before it can cause erosion or other damage. ' Third, development in basin the has only just begun. Properly functioning wetlands and streams have not yet been altered, nor have well -draining soils been covered by impervious surfaces to any great extent. Maintaining these properly functioning ' drainage systems should be a goal in this basin and will be the focus of recommendations made Iater in the report. ' Habitat characteristics. The habitat of Soos Creels Basin is generally good and supports large populations of both native and hatchery anadromous fish. The source of the hatchery fish is State a facility near the mouth of Soos Creek. Cutthroat trout reside in stream waters, and anadromous fish spawn and travel in ' many of the tributaries and the main stem of Big Soos, according to field observations and reports from local residents at the time of reconnaissance. Habitat is being damaged or ' threatened in some places by bank erosion and degraded water quality associated with land clearing, livestock feces, and wetland fillin"originates for development. One of the more serious instances of habitat -threatening erosion orig nates at the parking lot of the Seattle International ' Racewav (SIR), which is located on the plateau in the lower portion of the basin. Drainage from the paved parking lot is increasing erosion in nearby tributaries and filling spawning gravels with sediment. Appendix C of this report identifies sites of habitat damage or potential damage. Further water quality information related to habitat in the basin ' can be found in the Critical Stream Inventory of Soos Creek, published by Metro. B. Effects of Urbanization Low levels of development in most parts of the Soos Creek Basin, together with a ' well -functioning natural drainage system. have kept serious erosion, sedimentation, and habitat damage to a minimum until now. However, the present and projected rates of development indicate that there could be increasing amounts of damage, as suggested by the types of problems observed during reconnaissance. The expansion of impervious surfaces in the basin is already beginning to accelerate the rates and volumes of stormwater flowing into (and reducing the capacities of) both natural and artificial channels. impervious surfaces are also reducing the amount of highly soils available to absorb runoff_ The predictable impacts are already in ev dence�rvious erosion. mass -wasting, sedimentation, and degraded water quality and other habitat destruction. The following section provides a more detailed account of Problems found during, investigation. P field b C- Specific Problems Identified The studv team examined numerous sites along the main stem of Big Soos, Little Soos, and West Soos Creeks. as well as ?I small drainages tributary to these main stenis. Several of the most significant problems found during reconnaissance are described below. ' P:SCB Soos Creek Basin (continued) 1. Bank failures. On Tributary 0072A, river mile .30, for example, there exists a major bank failure triggered by bank undercutting. The source of the problem appears to be increased runoff from street construction. Unless flows are intercepted and redirected to storm sewers or other facilities, there will be ' increased bank erosion and consequential deterioration of property and stream habitat. ' 2 Channel Erosion. This includes both instream and bank erosion caused by large volumes of runoff emerging from storm drains and washing away highly erodible soils_ This creates a new, deeply incised channel that enlarges over time. One ' example of this problem occurs on Tributary 0072 near the SIR in the lower part of the basin. Large expanses of pavement at this location have contributed to high volume flows and channel erosion. 3. Flooding and potential ©ooditg. In numerous locations, development has increased the amount of runoff entering existing drainage facilities or otherwise impeded the ability of natural systems to carry the amount of runoff. When ' drainage systems fail to function as they were intended, flooding can occur. Increased development without concurrent increases in drainage facilities adds to the possibility that serious flooding will occur. On Tributary 0097 river mile 1?0. ' for example (collection point 11), the Little Soos has been contained and manicured as it passes through a developed plat. Such alteration to a natural drainage channel reduces the stream's capacity in places. The result has been the regular semi-annual flooding of some homes. Further development could aggravate these kinds of flooding problems. 4- Poor stream habitat due to. a. Lack of overhead canopy and strea aside vegetation. Overhead canopy stabilizes water temperature, while streamside vegetation protects banks from ' erosion. b_ Contamination by livestock feces. In areas of the basin where livestock have extensive access to streams, water quality has become degraded by animal feces. These cause harmful nutrients to be added to the water which can threaten fish survival ' C Erosion. Streambank and channel erosion, already described above, is caused in part by livestock access_ On Tributary 0073, river miles 3.60-4.70. for example, there exists poor stream habitat because livestock have trampled ' and denuded banks of vegetation. this has led to the sedimentation of spawning areas and caused turbidity. ' IV. RECOMMENDATIONS FOR ACTION The following recommendations are based on findings of the field team and reflect the original goals of the Basin Reconnaissance Program, as outlined in the introduction of this ' report. A. Inform appropriate governmental agencies of the detailed findings from the ' reconnaissance of this basin. Project representatives should meet with staff from King ' P:SCI3 Soos Creek Basin (continued) County Roads Division, Surface Water Management Division, Building and Land Development, and other interested agencies to transmit relevant information. B. Reevaluate specific poCtry issues regarding surface water management, These may include the need to: 1. Improve enforcement of wetlands regulations to maintain these areas in their natural states This will insure their continued function as surface water quality and quantity controllers, as well as preserve their habitat value. If regulation proves ineffective, the County should secure easements or consider other means ' to preserve wetland areas. 2- Requite the establishment of undisturbed buffers and setbacks adjacent to natural drainage swales. Variations in stream morphology and geology indicate the need for stream corridor guidelines that take these into consideration. Improve enforcement of "no clearing" covenants in these sensitive areas or seek Countv easements or actual ownership. Fencing along streams in livestock areas would ' help water quality and reduce erosion and sedimentation_ 3. Investigate and promote the infiltration of surface water where feasible and ' economical to reduce increased runoff from developed areas. Also, encourage the use of grass swales and open ditch conveyance systems to improve infiltration and water quality enhancement capacity. Areas of high filtration are identified on ' final display maps (for the Basin Reconnaissance Program) in the offices of Surface Water Management, Building and Land Development, and Basin Planning. 4. Require the tightlining of storm -drainage outfalls down steep or sensitive Mopes using state-of-the-art facilities, including high density polvethvlene pipe with energy dissipation at the outfall. ' 5. Reevaluate stormwater rate and volume release regulations for new developments - Current regulations may be inadequate and result in unacceptable downstream erosion that causes property damage and loss of habitat. !. 6. Increase current maintenance levels for King County surface water R/D and conveyance facilities. Due to the lack of funding, maintenance of existing ' facilities is sometimes insufficient and results in facility dysfunction and failure. These will only be agC1.71gravated by additional upstream development. 1 ' P:SCB } ' Soos Creek Basin (continued) ' C. Prepare a comprehensive basin plan to consider, at a minimum, the need to: 1- l nhance and utilize the extensive existing wetlands as regional storm -detention ' facilities without jeopardizing habitat values, Prepare a schedule for the anticipated need for these hydrologic enhancements as they relate to projected development in the basin and impact the wetland ecology. 2. F-mtmine existing storm -detention and conveyance facilities to determine whether their control orifices are properly sized to optimize the detention site and achieve the maximum benefit to the downstream systems. ' 3. Establish floodplains in low4yini areas of slight gradient for existing and g � � b developed runoff conditions, i.e_, adjacent to wetlands, particularly for wetlands proposed as regional detention sites where inundation of adjacent properties may be significant. 4. Identify stream reaches critical to the maintenance of anadromous and trout populations.. 5. Review geologic findings from this study in order to identify areas of particular soils' sensitivity and develop special analysis criteria for new developments. D. Construct the capital improvement projects according to the CEP priority selection criteria- These projects, identified in Appendix B of this report, include projects to: I Calibrate and retrofit existing detention -control structures and to improve existing conveyance systems. 2. Stabilize channels and slopes, ' 3. Provide regional detention facilities, including the utilization of wetlands. where biological assessment has determined that the natural habitat values will not be significantly altered. ' E. Maintain or enhance the instream and riparian habitats. ' 1. Maintain wetlands and buffer areas around them. These provide both valuable wildlife habitat and natural stormwater storage that helps to maintain gear -round baseflows in the stream. 2. Adopt a stream -corridor policy in the Sons Creek Community Plan to protect the stream corridor from damaging types of land uses in adjacent areas. ' 3. Encourage the Washington State Departmeat of Fisheries to allow use of the natural stream system for salmon spawning_ Maintain a natural run of ail the indigenous anadromous species. ' 4. Prohibit filling in the 100-year floodplain_ The County should establish regulations to prevent the loss of floodplains in order to maintain their natural ' storage for floodwaters and guard against degradation of important fish and wildlife habitat. I P:SCB 6 iI� _ `E R '1 r Nsrr�1`/..` ff_.'.•r'r 9r, �`l °a, RA'I, SOOS CREEK — - ,r rBASIN Basin Boundary • sE'»! ;t`T.T," Sr' ''''' • Collection Pint Boundary Collection ,. Sr .i.�;��;-� - O n Point S,r ,T _ — •t►.- Stream o< "I sT' `' •• S�ti sE O072 Tributary Number % 15405 1.5407 Proposed ProjectST lu -......... mi. � llFrbvRGs _ .i' rr h CR ST rpfr V•Ury SE r -5478 Y OF SEATFLE WATERS HE �^ +� • Sr ! L , • I Sr -' � • I � SEA v T.. _ g J �� 1 ,-J°r• n •i Sf] iSS 5E-=;. __ 5 • 1 L Y • sE Tx sT _.,. _.- -i ..,.. I �� W sr •• -.. 5t116 sr . f H I 76 5T _�_� .� � • 7� sc In !T.. • �. 009 a 1` • •r s07 a t S �5412 ..... EL x.. : 5408 �� ,, fxr".�. , .�y� �carf r : • �sE a.. cr *-_-.1...- Meridian •ti , I • .• tie *� 5417 g _ i� se �, ,. s '� • .r.+f CP , -� ^.I L.. ES s •,•: f I.-._"�. .. .....- gT, tib5 • r sE, • • KE ` 5 t 10 s;. ] se.lxxf rl ••: nl I a . ..... SR 169 • • s t' C n • r T.Q4" i IT SODS CREEK BASIN �R=t ^'C&JIW Ar si Eti s, fa•. r,. 1 ��f .� � 1 I Merid'ean •�I ~* Basin Boundary •.�, s, sw • . O S •. :• '.•4 i . • • • • • Collection Point Boundary J 0 P Ai to 9 ; _ Q �,, g� �� , r � �;� .o � `:.• �-:> I_( rJ417 Collection Point O • ,t " • 1 x Ala ''�,,� �� � � � -• �, Stream 0072 Tributary Number k _ ' r • • • • - *5401 Proposed Project �25 4. S'S.hc _ _RT • • — a o �4•. I ale�eE _ K, s u 5 •• •I I 13E Qu,3��• • I • IT r . -1„ ---111 _ -t— • Y sr <'QO It �•` Leo Itl <I r. . —, �' •• ..—...• Me>idw. , XE • 9 ' �� - 1. C ,A• . • fff SE rr! ST 1 • ;5 Yi0 : J glon sF n. iT scjy,Jx•Lr .._ • , �I 1 t-i• • • \ • E._....-• i A n •Eo SR I. �� } : •VC_Tx • • � ` I i .. _ trl, ti :._ � aaj� • .i i ; bt � r�I .sue"r n �! .r _ .�_�_, s sT sf zax• s ' 'a •' � � '� y,€.J Ea, Si • • r•1. FVF •a •• •••4 r._ jc :r sr • • • O E • �� -a — ;e f Y E � I � • I .. j 3 . � _ 51 !q Si • 1 +� 5 F -t/ M 3s / JR� IT IT • t+ L.5Y,1 _ K • rw :541 I :.0 a-- t sF �y _ mr rr e r � ilrr _ 40 5 Heights' EN RI VER//[ - {'{1MMF ITY i:f7LLU;E j fNI�•� 7' ±� AT.v...r rrr I."A.r 1 . ; iT �!'•. 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C CD l ~ c O 0- r _ 373 T Lj 'J ;J 1 0 1 1 1 1 APPENDIX B CAPITAL IMPROVEMENT PROJECT RANKING SOOS CREEK BASIN Prior to the Soos Creek watershed field reconnaissance, 13 projects had been identified and rated using the CIP selection criteria developed by the Surface Water Management (SWM) Division and the Natural Resources and Parks Division. Following the reconnaissance, 20 projects remain proposed for this area. They include the 7 new, previously unidentified and unrated projects plus the initial 13 projects. The previous SWM capital improvements project list for the Soos Creek Basin had an estimated cost of $3,450,000, while the revised list decreases to an estimated cost of S2,622,000. This 24% reduction in estimated capital costs is due mainly to downward revised cost figures for acquiring or securing easements over wetlands. The following table summarizes the scores and costs for the CIPs proposed for the Hvlebos Creek Basin_ The projects were rated according to previously established SWM Program Citizen Advisory Committee criteria. The projects ranked below are those for which the first rating question, ELEMENT 1: "GO/NO-GO," could be answered affirmatively. The projects can now be considered for merging, into the "live" CIP list. Any project scoring over 100 points should be considered for incorporation into the six -year CIP plans. RANK PROJECT NO. SCORE COST 1 5415 135 S 156,000 2 5417 127 ?23,400 3 5407* 113 123.000 4 5414 105 169,000 5 5409 * 100 221,040 6 5416 98 68,400 7 5402* 95 194,000 3 5401 " 59 153.000 9 5406* 33 17.800 TOTAL S 1.430.000 Indicates project was identified by SWM prior to the reconnaisance. 1-1 «. aav •3 � m 0AL'� � 6r � T � •O C6 c y y v rt E c c ro O &Z y _ 3 a 3 O er r •c w y C O :i c p '.••� •(� O � ' •> .O 4r W 0 �4r ° pp •Q C y 61 U C O 7 0 ea Qr V o= y � cc o c; U W Ei ,v U o 3? L a ,3 O L o ' car c G 7 1O. •, ci - �•+ +�% .. G4 v; C ."tee 3 �-.-. r lj � � n ? N N 6 � C � � C C T fE � a N _ G b [ E a e a cy O C m _ Q 1tl � � C ro 0 -- m 'ec u a� O c M y m �.r =� '3.0 O47�-r V �► j i0 C ' 'ci O C 7 et y a ej y p �s ro d CS cq p • y � o, � � C,? ti � w[ w E"" � � � � w. ro c E � . � R C Q 7 � C Lo G � Q '� LT� -•G O 'j 'J Q •s/1 G �, 6] " 'N^ R 3 o _ � } co 6. v O •z 3� Z � C y h a lu O O 73 r y C a O C c0 p �+ G g w 0 a 0 o p tr •C y t4• 7 C C G -•r. 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G = C � r C r r - x r v C w', r TASK 3 FIELD INSPECTION 1 I EXHIBIT J off -Site Analysis Drainage System Table rL� G z 3 1 1 1 1 1 1 1 1 1 1 ++ v G Cr C v � 7 W Qy •�;, .SVC s, O o Ei yamy�++ d aq q O A5 � N N t oo�v z z° z° z o O Q z z z z qa. G q 71 U y O Fr z z t7. � CV N ` a . u 4 0 0 >> /L""'• .0rz V o > a� x C a . la .� � on ao - El O N d3 Ll � v az b O O 00 1 TASK 3 FIELD INSPECTION ' There were no major problems reported or observed during the resource review other than the project site lying within the sensitive area known as an erosion sensitive area. Based on the review of the drainage complaints in the downstream drainage course, there were no existing constrictions or lack of capacity in the existing drainage system nor did the field reconnaissance find any potential constrictions or lack of ' capacity in the existing drainage system downstream from the site. M Conveyance System Nuisance Problems (Type 1) Conveyance system nuisance problems, in general, are defined as any existing or predicted flooding or erosion that does not constitute a severe flooding or erosion problem. Conveyance ' system nuisance problems are defined as flooding or erosion that results in the overflow of the constructed conveyance system for runoff events less than or equal to a 10-year event. Examples include inundation of a shoulder or lane of a roadway. Overflows collecting in yards or pastures, shallow flows across driveways, minor flooding in crawlspaces or unheated garages/outbuildings and minor erosion. Based on a review of the drainage complaints provided by King County, there is no evidence of past conveyance system nuisance problems occurring nor is there any evidence of any occurring during our site visit. One drainage complaint dealt with a plugged pipe immediately on the southeast corner of the project site, not on the project site. The project site does not drain to this ' pipe., which was plugged at one time but was cleaned out and the drainage passing through the pipe was allowed to pass through unobstructed. 1 3.2 Severe Erosion Problems (Type 2) Severe erosion problems are defined as downstream channels, ravines, or slopes with evidence of or potential for erosiontincision, sufficient to pose a sedimentation hazard to downstream conveyance systems or propose a landslide hazard by undercutting adjacent slopes. Severe erosion problems do not include roadway or minor ditch erosion. Based on our site visit and the King County drainage complaints, there is no evidence of, or potential for erosion/incision sufficient to pose a sedimentation hazard to the downstream conveyance system evident anywhere along the downstream drainage course. However, this project site is known to exist in a sensitive area for erosion problems and, during construction when the site is unstable, there will have to be some measures instituted to prevent erosion from occurring on the project site so that the wetlands and Soos Creek are not impacted by sedimentation during construction. 3.3 Severe Flooding Problems (Type 3) Severe flooding problems can be caused by conveyance system overflows or the elevated water surfaces of ponds, lakes, wetlands, or closed depressions. Severe flooding problems are defined as follows; • Flooding of the finished area of a habitable building for runoff events less than or equal to the 100-year event. Examples include flooding of finished floors of homes and commercial or industrial buildings. Flooding in electrical heating systems and components in the crawlspace or garage of a home. Such problems are referred to as "severe building flooding problems." 11418.008.doc [1P1/tep] 1 • Flooding over all lanes of a roadway or severely impacting a sole access driveway for runoff events less than or equal to the 100-year event. Such problems are referred to as "severe roadway flooding problems." As mentioned previously, there is no evidence of flooding from the drainage complaints or from our site visit downstream of the subject property. The entire downstream drainage course courses through mostly undeveloped land that consists of trees, brush, wetland, and a meandering stream with a couple of street crossings, including S.E. 192nd Street and S.E. Lake Young's Way approximately 1 mile downstream from the subject site. Most of the downstream drainage course occurs underneath the BPA transmission line easement. The portions of the downstream drainage course investigated by this site visit and a review of the soils map indicates that the downstream drainage course occurs through Alderwood, Norma, Everett, and Seattle muck type soils. The field reconnaissance for this off -site analysis drainage report was conducted on November 29, 2004. The skies were partially overcast and the high temperature was less than 40 degrees. 11418.008.doc [IP7ltepj 1 ' TASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS 0 ' TASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS ' Runoff leaves the site by sheetflowing off the eastern property line of the site through thick vegetation and a wetland area for approximately 300 feet until entering Soos Creek, which is a meandering stream lying east of the project site. Runoff then courses southerly through Soos Creek until it crosses underneath S.E. 192nd Street though 36-inch CMP culvert at a fairly flat grade. Runoff then courses in a ' meandering stream known as Soos Creek over 1 mile from the site until it crosses underneath S.E. Lake Young's Way. This entire downstream drainage course occurs through wetland, tall brush, and treed areas. ' Review of the Exhibit K — Drainage Complaints show that there are no complaints concerning low conveyance capacity, flooding, or erosion in the downstream drainage course within 1 mile of the site. ' We investigated the complaints that we believe to be near the downstream drainage course based on the complaint list. After review of each complaint, only one is actually near the downstream drainage course. Complaint No. 96-1550 This complaint concerns a plugged culvert that caused flow to ' overtop a gravel driveway immediately adjacent to S.E. 192nd Street, which this project site will not drain through after development. This complaint has no impact on the analysis to determine flow control requirements for this project 11418.008.dm IM/tepl EXHIBIT K Drainage Complaints I I U V . GG. C_KA -4 11 VJDHi'i K. _ V4L_MU NU. 66U P. 1 /5 din Cottr� Water and Land Resources R Division FILE COPY ' 201 S Jackson St, Suite 600 Seattle, WA 98104-3855 J/ / ' Date.- NumberFAX of pages including cover sheet: 1 n Fax:. `/ fit. ,i Phone: From: Candi McKay. Eng„Lech II WLR tormwater Services Section Phone.t 206-296-1900 Fax Number. .2Q6-296-0192 Il1IPURTANT LEVEL L •ANALYSIS NOTE: We do not send copies of certain complaint types that are not relevant such as BCW, FI, FIR, FIR and WQA, and we do not send CL and L,S types, See key below, Type S 1, S2 and S3 will not be faxed due to size constraints, -// -" - // � 112, The following is a list of complaint types received by the Water and Land Resources Division Drainage Services Section. Complaint numbers beginning prior to 1990-MM have been archived and longer in our possession. They can still are no be retrieved, if necessary, but will take additional time and may not be beneficial to your research due to their age, development which has occurred, etc. If you are interested in reviewing the actual complaints, they can be pulled (time permitting) for your review_ Copies can be obtained for $ .15 per pages and $2.00 per page for plans, Keys: oL ty—enyQ9tion Oak, pe at.Problern C Ae iw ReVost FGW Business' for acan Water DCA Dovelopn=VCoastruction DDM Drninago - huscallancons CCg Response to Inquiry OCL Claim DM Drainage—BrOgOWSedimentation . EH Fnforeernenton hold DLE Drainage—Landali*A%rth Movaamt DTA Drainage TechniolAasistancc ER Enforcement Review FCC,FCF,FCS Faciiiry Complaints . wo Prniaw — Gam -al inquiry MMA FI SWMFeaIn9tiEry P1R Naumann= - Amtetim MMF Maintenance -Hooding SWM No Review FMU SWM Fee on Hold, MG Malntenancc .General MMM Maincanaace - Mowing MI�f ltintenance—Nee&JAdnw=ce R Factflity Englncmn$ Review NDA NcighburhoodDrainage Asptaucp NNW Mainrewsoc NWdous Weeds SWF WQC water Quality complaint SWMFee Qatolieos WQB Water Quality —RM Mattagemcut Prattlers WQR Water Qawuy Sotauxment. WQD Water Qnaliq' — Dttmping WQR Water Qualirg Su*ca Wg Review WQA WaturQualityAndit WQI W&W QuW*—IlUck Connection woo water Quality — Qdw pJaA4 SWMFee-Raurcasarotneat GRT MM Fee -Grant SIS2.SM Bngineeting Studira N D SWM Foo-New Dlscaun t "5ubjoct to Public Discigaprt+ tegulm`neM L Reoelpt orwrAwm mq=t for documents 2 Review and approval by Praaecuting Art my's oflroe i 1V r . C-L. GrarJH 11 lJOFiI'I Ni- WL-mu NU. hbkl F'. 2/5 limp C=tx Water and land Rescues im - lMk= SerViM Sucft ' V '1910 902PDh PMted . 11/19/2004 1:M--07 PM 4mpmt Type amber Cede TYP OT�u�®nI AddPas of Prom Cemmonts TOO PsDD 1975-0076 C FLOG AD WY/FLD'D/112TH AVE SEISE 186TH ST 686E2 ' 1977-0003 C DFING 12207 SE 192ND ST GOLDEN BILLS 1977-0072 C FLDG 12202 SE 192ND ST 586F3 111171-0,110 C 1978-0081 C PONDING DRNG 19248 121 ST PL SE EAST OF BENSON HWY 686F2 686F2 19248 121ST PL SE 1979 0047 C 11403 SE 204TH Sr SOIL BULLDOZED/PANTHER LK AREA 688F2 G86E2 I1981-0081 C 1961-0215 C DRNG DRNG 19917 19918 122ND PL. SE SLOCKEDIEAST HILL AREA 686F3 122ND PL SE CIB CAVING IN 1962-0539 C FLDG 12600 SE 192NO ST EAST KENT AREA 686F3 11983-0424 X DRNG 12528 SE 202ND PL SYSTEM MAINTENANCE 686F2 686F3 1984-0298 C FILL 18504 112TH AVE SE ILLEGAL NEAR: 17409 126 TH AVE SE 1984-0313 R FLDG 13250 SE 192ND ST To ROADS DIVA 686E1 11984-0314 C FLDG 13250 SE 192ND ST SE 192NO ST/134TH AVE SE 686F2 1984-0324 C pRNG SE 204TH ST/124TH AVE 686F2 1986-0702 C DRNG 12240 SE 200TH ST MAINTENANCE OF LOT 686F3 686F3 986-1166 C FLDG 11202 SE 166TH ST STORM OVERFLOW 686E2 986-1185 G FLDG 11202 SE 186TH ST SEE: 86-1166 BRYANT, BILL 9p- 4 190 C FLDG 11001 SE 186TH ST BASEMENT GETTING WATER 666E2 686EZ 9L. 1246 C FLOG 20236 127TH PL SE WATER FROM NEIGHBORS 87-0916 686F3 1987-0334 C DRNG 11202 SE 186TH ST CULVERTS BLOCKED 86-1166,1185 686E2 1987-0471 C FLDG 11202 SE 1BOTH ST SPRING GLEN 66-1166,1185 686E2 987-0545 C DF1NG 18627 109TH AVE SE INADEQUATE SYSTEM 686172 1987-0675 C DITCH 19407 124TH AVE SE DRAINAGE DITCH ON PROPERTY 686F3 C l987-1049 TO RD COORD 04/27/87. 686F2 as-02-38 C FLDG 18491 120TH AVE SE NEW DRIVEWAYWILL IT FLOOD 686F2 1988-0238 ER PIPE 18431 120TH AVE 6E NEED ©(TENSION OF 42" CULVEFIT 686F2 4988-0651 C DRNG 20002 124TH AVE SE FILL IN WETLANDS 989-0003 C DRNG 18612 120TH AVE SE INCREASED RUNOFFICHANNEL 686F3 686F2 989-0019 C DRNG 19400 124TH AVE SE DITCH MAINTENANCE 686F3 389-0192 C DRNG 18612 120TH AVE SE X PIPE NOT WORKING 686F2 1989-0410 C DRNG 12213 SE 199TH ST PONDING IN DRAINAGE EASEMENT 686F3 F)69-0650 C DRNG 16631 111TH PL SE S/W DRNG AND DAMAGE 686E2 89-0700 X DRNG 18631 111TH PL SE WATER ON SIDEWALK/69-0650 FRtTON 686E2 1990-0075 C DRNG 11264 SE 186TH ST PLUGGED CULVERT/STORM 686E2 1?90-0141 C FLDG 18400 112TH AVE SE POND OVER FLOW/90-0149,235,372/STOR 686E2 90-0149 C FLDG 11202 SE 186TH ST R/D POND OVERFLOW/ROBERT/ STORM 686E2 1$90.0231 C DRNG 18425 112TH AVE SE WD POND OVERFLOW/STORM 90-274,37 686E2 1 Paga I of 4 .._- . Lam, - - €1V . bbU F �5 1 t lbw � Im of pralm Ad s of pram 1! ca�lmnt� Tbrfs Page 1 ]235 C FLDG 11202 SE 186TH ST WATER IN BASEMENT/STORM/90-141.149, 1W0-0274 C 1990-0342 C FLDG FLOG 11022 11202 SE 1a4TH PL SE FVD POND FLOODED/STORM 666E2 686E2 186TH ST RID POND/ROBERT/ STORM EVENT 1990-0372 X DRNG 11202 SE 186TH ST R/D PONDS OV ItiI�Fl.DW91sa-141,1a9,2a5,2 686E2 sasE2 1s90-0664 ER MANHOLE 12400 SE201STPL 1990-0709 CL FLDG 18504 FAILURE-LINDA CREST PLAT DIV 1 & 2 68gF3 199D-0884 C DRNG 112TH AVE SE CL#12959 SEE CL#13224 DUE DECEMBE 666E2 1847 112TH AVE SE RID POND DRAINAGE/STORM 1990-1061 CL FLDG 11202 SE 186TH ST b8GE2 CL#13224 SEE CL#12959 GARAGE FLOG t 990-1063 C DRNG 12025 SE 196TH ST SPRING HILL ONE/OITCH NOT DRAINING 686E2 1990-1186 CL ' 1990-1212 C FLDG DITCH 11044 11044 SE 186TH ST SE MEMOfRUDDELLS STUDY TO PA 686F3 686E2 186TH ST RD/SIDE DITCH-PILLI90-1186 199(}-1212 E FILI./bl7" 11044 SE 186TH ST WILL START WORK 09120 CHIC ON 09/30/9 68GE2 11990-1212 ER 1990-1228 C FILU/DIT DRNG 11044 SE 186TH ST RUDELLS STUDY 666E2 68GE2 16615 107THAVE SE FLOODED BASEMENT/BAD ROADWAY 1990-1445 C DRNG 18427 112TH AVE SE R/D POND OVERFLOWING TO STUDY/91-1 686E2 t1990-1530 SR FLDG 16427 112TH AVE SE STORM EVENT 686E2 990-lWl SA FLDG 18427 112TH AVE686E2 S1= STORM EVENT NOT NQAP 1991-0150 C DRNG 18624 112THAVE SE 686E2 ' 1991-0150 SR DRNG 18624 112TH AVE SE NOT NpAP 666l=2 C FLOG 18425 112TH AVE SE 6666E21991-0196 1991 -0196 SR 19, 253 C FLDG DRNG 1842S 11254 112TH AVE SE 188TH ST SE NOT NQAP 686E2 686E2 1991-0299 C FLDG 19835 121 ST AVE SE OVERFLOW OFF PIPES 686Fz 11991,0299 SA 991-0426 C FLDG FLDG. 19835 121 ST AVE SE REFER TO BALD 686 3 686F3 12100 SE 197TH ST WASHOUT OFROAD/DEVELOPEMENT 1991-0438 Si 686F3 SPK TO FINISH Si 3/4 - S2 TO V2 CON 68GE2 ,991-0667 CL DRNG 18427 112TH AVE SE SEE 91-0439 SEE RUDDELLS 991-0837 C DAMAGECB 19001 118TH AVE SE C/B BELOW GRADE 696E2 1991-1005 C DRAINAGE 12213 SE 199TH ST POND►NG€ IN YARDIFENCING 686lr2 991.1095 C 1991-1132 FLDG 11200 SE I06TH ST RUpDELL POND OVERFLOW 665F3 C DRAINAGE 19000 11STH AVE SE INFO TO PM&D 685E2 1991-1149 x FLDG R/D 11200 SE 184TH ST CCF# SWM-1031 RIp POND CAPICITY 686E2 994-0088 C 0994-0144 PONDING 11430 SE 192ND ST POSS GRADING/FILLING VIOLATION 686E2 C PRNG 17925 116TH AVE SE POSS FILLING VIOUACT PLAT MORNING G 68GE2 i995.0200 C DITCH 7S 18204 118TH AVE SF LACK OF CONVEYAYNCE ON PVT PROPS 686E1 396-0245 C RUN OFF 19526 122ND PL SE SPRING HILL ELEMENTARY INFO RDS DIT 666E1 1996-0788 C FLDG 12232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 68 6F3 1996-078a NDA FLDG 12-232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 686173 396-078a R FLDG 12232 SE 200TH ST FLOODING b DUE TO STORM AND SUBSTN B86P3 1996-08{15 C ORNG 19400 120TH AVE SE DRAINGE FLOW QUESTION DEVELOP INF 686F3 I 68GE2 Paget of 4 v r �� . �cc, i y • ei MIA r\4 WLRU NU. bbU P . 4/5 Numberlant % Type 9f Pre W Adtirass of Pra�lem Gommonts Toros Papa 1 1550 C 1996-1584 C DRNG DRNG 19121 124TI-I AVE SE PLUGGED DNV CULVERT IMPACT To PVT 686F2 ' 1936-1635 G DRNG 18908 20024 i 13TH WAY 5E PRIVATE PROPERTY IMPACT TQ PVT DRN 686E2 124T1-{ AVE 5E ROAD IMPROVEMENT PROJECT IMPACT 1996-1906 E RID POND 12813 SE 232ND 686173 PL FENCE ENCHOACHMENP INTO TRACT 'i 996-2071 C FLDG 11828 SE # 80TW $T 686F3 INADEQUATE CONVEYANCE OFFSITE FLC7 1996.2D71 R FLDG i 1828 SE 1 BDTH ST 866E1 INADEQUATE CONVEYANCE CONVEYANCEOFFSITE FLO 1997-1123 C GRADING 18906 113TH WAY 666E1 SE PVT PROP IMPACT NO DRNG INSTALLED ' 1997.1123 A GRADING 189Q8 113TH WAY 686E2 SE PVT PROP IMPACT NO DRNG INSTALLED 1997-1179 C DRAINAGE 19113 121ST PL 686F2 SE INSTALLATION OF DRNG IN RAV OLD/OFF 686F2 NDA DRAINAGE 1911 a 121ST PL SE INSTALLATION OF DRNG IN R/W OLD/OFF 686F2 <- '1997-1179 1,997-1179 R DRAINAGE 1911s. 121 ST PL SE INSTALLATION OF DHNG IN R/W OLD/OFF 686F2 1997-1301 G 1997-1505 DRAINAGE 19125 121STPf* SE SUBSTANDARD INSTL OF DI9NG SYS PVT 686F2 C i 997-1572 C TREYS TREE 12232 SE 200TH ST DANGEROUS TREES ON COUNTY PROP 666F3 7 2232 SE 200TH ST REMOVAL OF WINpFALLS REQUIRED 1998-0019 C DRAINAGE 19016 116TH AVE 68BF3 SE NEW GRAVEL Rb POSSIBLE PVT PROP IM '1998-0058 C DRAINAGE 18820 11 6TH AVE B88E2 SF 5FR CONTT IMPACTING ADJACENT PROP 1998-01 a8 wQC OIL SPLL SE 199 ST/i24 AVE 6gsry2 SE SPILL OF POLLUTANTS ALONG RD R/W 1998-0$61 C I998-D92B DRAINAGE 12463 SE 198TH PL 686F3 INFO RE4111�STRE W<=TLANb/OPEN SPA 686F3 ' C 1999-0306 DRAINAGE 19138 #21S7PL SE APPARENT OBSTRUCTION IN ROAD DRN 686F2 C DRAINAGE 11018 SI_ 188TH ST ADJACENT PROP PAVED 2500 SQ FT 199Q-�7329 FCI� BAMBOO 12317 SE 179TH PL gg6� NON NATIVE GROWTH IN RID FACILITY 9_ ,503 C 12000-0398 FENCE 12455 5E 1B8TH PL 686F1 REQUEST FOR FENCE BOLLARDS AT ACC C ''000-0572 C DpM 12625 SE 192ND ST (386F3 REQUEST TO DIVERT FLOW DISGHARGIN G86F2 ''ova-D572 R DDM DDM ACRDS 19029 120TH AVE SE APPARENT FILLING OF ROADSIDE PITCH. 686E2 AGROS #g02� 12oTH AVE SE APPARENT FILLING OF ROADSIDE DITCH. 2000-0713 C DDM 12232 SE 200TH 1386E2 ST INCREASE FLOWWS IMPACTING DRAINA 1000.0713 NDA- DDM 12232 SE 200TH 686F3 ST INCREASE FLOWS IMPACTING DRAINA017 000-0713 R DDM 12232 SE 200TH 686F3 ST INCREASE FL FLOWS IMPACTING DRAINAGE 2001-0247 FCR 00170322 MMA 12317 Sf; 179TH PL ' 686F3 IDENTIFIED NOXIOUS WEEDS, BLACKBE 686F1 1001-0322 WQO 11631 SE 164TH ST APPARENT GREY WATER DISCHARGE INT WQC Woo 11631 SE 184TH ST B86E1 APPARENT GREY WATER DISCHARGE If�T ?D01-D389 WQC WQI SE 180T & 118TFiAVE 686E1 $1= POTENTIAL GRAY WATER DISCHARGE, 0Di -0388 WOE WQI SE i 80T & i 18TH AVE C s86E1 5E POTENTIAL GRAY WATER DISCHARGE. Q01-0389 WQR WQ1 SE 180T & i i$TH AVE C 686E1 SE POTENTIAL GRAY WATER DISC HARGF. 061-0416 WQC Woo 12232 SE 200TH ST C 686E1 CONCERN OF SOAP SUDS BEING D[SCHA )01-0455 WQC W(;1B 12313 Sl✓ 196TH ST 686F3 APPARENT LACK OF POLLUTANT CONTR 2001-0455 WQR Wag 12313 SE 198TH ST 686F3 APPARENT LACK OF POLLUTANT CONTR U2-0314 C tJG2-0361 DDM 18524 114TH AVE SE 686F3 SHEETFLOW ONTO PROPERTY FROM LIP C DDM 11625 SE 184TH ST 686E 1 SOGGY AREA 1N YARD. MAYeE TW>= RES 686Ei 2002-0403 C MMA 12235 SE 199TH ST REQUEST TO REMOVE TREES ON COUNT 666FS Page 3 of 4 �� �� • i n w�rcL 1110. bbij P. 5/5 COMM Typo Typo of PrOWAM Iltldrus of Pt l co�mpnts ihras P806 2 ]553 G l37A 19013 114TH CT S>= CONCERNRECARRING POSSIBLE St.Ol1G ' 2003-Q84b 2003-0762 WrJFI WQA WQS WQAI 18gQy 19433 t26TH PL 5E 686E2 686F2 VASHON HWY SW BMPS 2003-0847 G Eil)M 18230 116TH AVE 5E are ALL IN PLACE 686F2 A ppM 1923© APPARENT OBSTRUCTION of QFFSl1"� c 686E2 '2003-08Q7 2003-0909 woo WQDR 11 BTH AVE 5E APPARENT OBSTRUCTION OBSTRUCTION of OFFSITE C 6t3se=2 1$601 126TH PL SE AUTO FLUID RESIDUE ON STRE:E1-AS A R 2004-4223 F'GR THE 1$004 124Ti-I AVE 5E removed from Eaoiiity D92182. lnves#iga 686F2 69$F7 'tress 2004-028E I± MNM 18004 124TH AVE SE FacU1Ly D92182 dispersion trench filled/graded 686F7 2004-0286 FCR MNM 18004 1247F! AVE SE Facility D92182 dispersion trench filled/graded 686F1 R- MNM 18004 124TH AVE SE Facility 092182 dispersion trench filled/graded 686F1 '2004-0286 2004-0337 SUP REC 12462 SE 198TH PL 2004-0337 SUPF REG 124Ei2 SE PARKS REQUEST TO INSTALL TRAIL AND 686F3 2004-0389 FCS MNM 198T1-i PL PARKS REQUEST TO INSTALL TRAIL AND 688F3 ' 2004-0453 WQC WQDR 12232 SE 200TH ST 68BF9 12212 SE 199TH ST 2004-0745 G pTA WO problem of gasoline in stomp syst 686F3 1$418 127TH AVEPpssble SE: 2 pipes from neighbor drain onto complair7arrt's 686F1 1 1 Ll Pqe 4 of 4 i� . i . �c[--. 1 Ci • J I P'IS I Rl. jNLRII King County Water and Land Resources WLR .Division 201 S radon St, Suite 5Q0 Seattle, WA 98104-3855 ' Date: i FAX 7 L, n u Fax.. t a Phone: HU. S.a`J F/L E° F'. 1/1-- Number of pages including cover sheet. __ From: Candi McKay, E� ngTeTech 11 WLR Stormwater Services Section Phone: 206 : 96-1900 Fax Number: .206-296-01 2 IMPORTANT LEVEL 1 AANALYSLS NOTE: We do not send copies of certain complaint types that are net relevant such as FCW, FI, FIR, FM and WQA, and we do not send CL and. LS types, See key below. Type S 1, S2 and S3 will not be faxed due to size constraints. # I //� 114 If ' The following is a list of complaint types received by the Water and Land Resources Division Drainage Services Section, Complaint numbers beginning prior to X 990-XXXX have been archived and are no longer its our possession. They can still be retrieved, if necessary, but will take additional time and may not be beneficial to your research due to their age, development which has occunvd, etc. if you are interested in reviewing the actual complaints, they can be pulled (time permitting) for your review. Copies can be obtained for $ .15 per page, and $2.00 per page for plans. Keys. TyM to .i "' Twat Problem • c Acdou Request Raw $ueincu, for Clean Water DCA iseVe3npaienrlCon8ligC[i0n DDM Drainage - MISceRmseous CCF Response to Inguity *cL DES Arainago—VMnoWSadia=Mdbn - claim RH Eddreenbw on O DLE Drainage--LandslidaRanhMovcmrnt DTA Drainaga'llachnieal Assisw6m ER FXmvmnant Review POC,FCRXCS F-VICYOmtplainta INQ p air1w C-nem, Inquiry MMA Maintaunce-Aesthetics K SWM Pee Inquiry MMB Mainicnattca -Flooding FIR SWM Fee Review 1?IFi MMG Maio omwo - CTMMI SWM Foo on Hold +Ls I.a+wac iit MAW Mainteaattcn - Mowing • RR Faelli y Eagi0tedag Review MPFM , Maintenutoe—Needs Maintenance MN 4V Mwamnanm-Nbuaus weeds NDA NeiolsadtoodDRainpgoAossisp= sWF SWM F�xQao3iims WQC Water Quality Casnplaiut WQB waw Quwiw Hnforcowt WQB Wafrr Quality — Best Mumggmt Practices WQD wirer Quality--Dnrt>&g WQR Water Q wity 8nohming Review WQA Water �4 'W t i�nnection a1i Audit WQO WONQaality—Odw URi SWMFee43=t S1.5$SM3 Un&eefing Studies NWD MM For New Discount *Subject to pawe Meld am fequk=enta 1. Rooeipt d'k&M tan Mqueat for docu wis 2. Review and approval by Pmw cuting A onmyrs office ­ 046 tbON-I Y DEPARTMENT OF PUBLIC wbkKS SURFACE WATER MANAGEMENT DIVISION. COMPLAINT INVESTIGATION REPORT NATURE OF COMPLAINT: { 11& e-, SEC �TVVP-LRGE S LOCATION: (� 1vl llcr -{r. .�1 '`f,_C] PL KROLL PG. COMPLAINANT;E' - a'5 O:ra t L COUNCIL DIST, ' �I ... ._ — PHONE H0. HOME: - Address � e city Statew______ 7-]P,.' WORK: (P _� 't31� c : ' RETAILS OF'CCMPLAINttT: -- - ��S�u9SQ� Lam° 1 swr 48g-a�s1 Bur,� COMPLAINT RECEIVED QY: r ILS OF INVFSTIGA11ON: 1 I Sketch on reverse side: Yes El No ❑ Photos: Yes © No M OWNlY ' his S��d an i r 60-1J iwT lwv- rlGA1�A sY; - - �, _ - - _ : DATE: ACTION TAKEN: iComplainant advised of action possible or taken by: Rhone D Letter ❑ Personal Contact 0 - Complalnt Acton Handled 6y Closed: OK'd: Hume Dale ��lliei ULI.. 1 . C-Uy-J14 Received by: 1 Raosivad from: NO, 839 KING COUNTY SURFACE WATER MANAGEMENT N DIVISIO D�AGE RNWESTIGATION' pjE Wage i s INVESTIGATION REQUEST ' PORT Date: F-'/ .26 1-7 6 OK'd by: F1I N (Please Print plainly for saannf 9 U. Type NAME: �- (Day) fE'al _ r PHONE S - AbDRi=SS: .� z A S Cry LState Location of problem, if different: — ' Reparfed Pmbfam: cif " %� ' � ' �.2,4 � V c. • �/`f���c� c�ra•i7a�� �/ Go¢ 2 oP S',P Z?S1/3 Plat name: /0,0-m use 5 ��n C, a-raWi -TRS V i i/ Utter agencies invo{ved; 1/4 _ S' T � Basin n� ?FSMANZIgir- _ Lot No: 13 Block No: No Field investigation Needed Parcel - --- wOII S Th,I3ros: New �p Council Dist Charge No: Old a` ;19 % by phone letter in person 9y $- p<t Ccicr? L7i�rz� SffZ r SA«i f ��-�y , 05 %g .� S !r%rp d L'o •NC dq T ISPOS/r/ox Turned to on by _ Lead agency has been notified: Problem has been corrected. No problem has been {dentifi�. ,Private problem - NDAP will not consider because: — Water originates onsi#e and/or on neighboring parcel — Location Is outside SWM Service Area CLOSED: _�4 ,27 b� OR. No further action recommended because, Prior i�vest{gatic n addresses problem: ~Sae FIs Other (Specify): I -- - A61-0 6g--� ---- 1, r,ciCl-. 1K • ✓lnl I 1\l. WLfC1J -uIso �h .ddl Y.4/111 i 1 1 1 1 1 1 1 1 1 1 1 Iung County 96 1550 Surface Water F� NO. Management NAME JEANNIE RILEY gma-,a now dire... ADDRF,SS 19127 - 124TH AVE SE DRAINAGE INVESTIGATION REPORT IMOLO Iss, PAGE see-- �z FIELD INVESTIGATION PAc3E 605W, DATES 9-13-96 MAIM DTVISION 4 TNULAT S , MAM DETA.TI S OF INV$STi4A'nON: SITE VISIT ON 4.a8-9a. PLUGGED DRAINAGE CROSS CULVERT. N INVESTIGATION FOUND SIGNS GP DRIVEWAY BEING WASHED OUT AT 19121 - 124TIi AVE sr -AN 1a' CONCRETE DRIVEWAY CULVERT WAS FOUND TO !Ifi FULL OF SEDIMONT ANp GRAVEL WHICH 18 RESTRICTING PLOWS. DURING INV9VnQATION ONLY A SMALL AMOUNT' ON WATRA WAs PA89ING THROUGH THE PIPE. PHOTOS YAKEN * 1 LOOKING AT DRIVEWAY AND SIGNS OF WASHING OUT CAUSED BY PLUOGM CULVERT. # 2 LO0rJNG AT UPS'I' EW END OF CULVERT IMPACTED WITH SKETCH: Houa I: luill POWER PALE 0 • 1 RO.rDE aRAINA4E _ Y SE 192ND ST 4 aRAVEI. ORMWAY AREA IJNQ WAOHIM OUT CROSS CULVERT 1r Come plpE — r MOW 41AECT on f vj"q 1 rJ • .3'JHI'T Nk- "L-KD NO. any H. �/1L--1 1 t 1 1 1 1 1 1 1 1 1 TO PONY LEDBETTER SUPERVISOR FROM ROADS DIVISION q I A�iAY [SETTLE. SI? AENTON SURFACE WATER MAN MAIL STOP sA LOCAL DRAINAGE gEpyl6 King County MAIL STOP G22 Surface Water Manag4ment --vo.• A.w MESSAGE DATE 9-27-96 FOR YOUR RESPONCE, DRAINAGE PIPE AT 18121 - 124TH AVE SE AAPEAAS TO BE WITHIN THE 120' RIGHT-OF-WAY AS SHOWN ON THE ACCESSORS MAP. PIPE APPEARS TO BE PLUQGED. PLEASE REPLY'IF ROADS WILL CORRECT. IF NOT POSSIBLE NDA. s' G c:ouNTY WATER AND LAND RESOURCES DI''VISiQN �DRAINAGE INVESTIGATION REPORT P� ^; : , . Page " INW-MGATION REQUEST PROS I.EM:ti� 1.�1 Type ~C i'VED$y; Da �% K'd b :1'� i�FILE Received From: D• f i N (Day) ADDRESS:41!:!:�1/c� �� �Cit3, z7�, rd State Zip -' Locadon of problem, if different: keporlud Problem: CALL riRSr (Would Like To Be Present). d r! aj 571 lam' 9 71 o p , f Z o P��-'n _rY d e el r.1 � �L _,CVT7,1 0 r A-19s Lr�p� �! /%/��= [...mac j� ✓� S 77� �- 4xr-/T Other agencies involved- Lot No; 13 Block No: No field investigation required (initials) �� s T R Parcel No, I R g� 1 Kroll (C6w Th.Bros: New ? F2, Ba4zm _ CouncilDistrict. 9 Old 42 � RESPONSE, �- Citizen nati ie i on Charge Na. _,.... �". "_.. " .� ,......... by. phone letter _� in person etee t rD o-/ - Qp ,vo ilir_S tY s �•, I kv�� 4�t&-�17 hxo0j— DISPOSITION: Turned to /� On U j � b i y QR: No further actaion recommeurled because: ■ Lead agency has been notified: Problem has been comected. No problem has been identified. . Prior investigation addresses problem., Private problem - NDAP will not consider because; $U �r, a _� -Water originates orasite and/or on neighboring pal. Lacation is outside WLRD Service Area, ATE CLOSED: By: ._Other (Specify): NU. 6j'J F-. i/I i-, 1 11 Kma C OIrNTY Dsparbnant of Natural Reavurces Water and Land Reeource Dlvislon DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION - Fux wo. 9 7-1179 NAUZ SIEVE SKOALS ADDRESS 19113 - 121ST PL SE PHONE 854.4201 'TB PAGF- 6E6-i=2 KROLL PAryu BOSW DATE 7-25- ILADTT DIVTSIQN 4 INITIALS - MAM DETAILS OF INVESTIGATION: SITE VISIT ON 7-24-07. PROpERTY OWNER AT 10125 -121ST PL SE FILLING IN DRAINAGE DITCH WITH g" PERF. A�l1 INVESTIGATION FOUND 121ST PL, SE IS A PRIVATE ROAD WITH AN OPEN DITCH ON "IF, WEST SIDE OF TKIE STREET. lV THE PROPERTY OWNER AT 16108 13 IN THe PROCESS OF INSTALLING A 6• PEHF PIPE Wi7H DRAIN BOXES IN THE DITCH IN FRONT OF THEIR PROPERTY THE E)QSMNG D131VEWAY CULVERTS ARE 1 I E MATH DR FURTHER INVESTIGATION FOUND A CONTROL 6TRUCTURE WHICH SERVICES THE DRAINAGE DITCH. IT APPEARS ERTMe PROPIeftTY OWNER AT 10133 - 191 ST AL SE HAS FILLED IN HIS PORTION GF DITCH WITH B• PERF PIPE. PROPERTY OWNIERS MAY BE REDUCING THE STORAQE VOLUME WITHIN THE DITCH BY FILLING, PHOTOS TAK(FN # 1 LOOKING NORTH DOWN 141 ST PL SI:, # 2 LOOKING AT THE a PERF PIPE INSTALLER BY PROPERTY OWNER AT HOUSE 101a2, # ] SHOWING INSTALLATION OF PIPE IN FRONT OF HOUSE 10136. A SHOWINQ INSTALLATION CF b' PERF PIPE IN FRONT OF HOUSE 18126. # a LOOKING SOUTH DOWN 121ST PL SE FROM 114 FRONT OP HOUSE 1011*. S"TCH: 7"" � � 9m+ l) i Sr �` 7 ,� 19 A �a fuv�, ,I W �(p0 (fhKY Ux I{ P` $E .10", 19f13 �A �D�� HOUSE 10IL5 r PiRF DRAIN 6 Ir ADS 11 LHF71 6(Q t7 OON7IiOL sTF111CTyRQ lr CONG W IZ N w SE 1 92ND ST �,, 4 �S�dS S 1' UAL.. 1.LeJeJ4 1L�.J��-I Iii4'I F 1. WLKji NO.i�J� NSI D�7SODb DRAINAGH ASSISTANCE PRDaRAM COMPLAINANT EVALUATION Xd0 ' DATE: September 2, 1997 TO: FILE PROM: %JEFF JACOBSON RE: IMOINERRING EVALUATIODi FOR COMPLAINT NO. 97-1179; Skoala COMPL41NT CBZRONOLOGy: 0R1GINAia :. 7 /21/9 7 FIELD INV.- 7/24/97 FIELD EVAL: 9/03/97 OLD FILES- N/A RACY -GROUND TIle complainant "Vag along a private roadway part Of Short Plat 879082. The original drainage plana for the short plat show the open ditch system on the west side of 1218t Place SE was designed far infiltration/retention as well as connveyance. The open ditch conveys runoff to a control structure located at the intersection of 121st SE and SE place 19211d Street, The open ditchea have 12-inch c1riveway culverts located intermittently, connecting them tO one another. The COMPlainant is concealed with the recent development ' area and the intrusion upon the p iear n the Open ditch System. bast resident. at 19133 1718t Place S8 filled in the open ditch yfronting the PrOPertY as part of their detached garage addition, A 6-inch conveyance pipe was ed installed before the ditch w,ae filled. Accordingtothe complainant surface water from the open ditches overtopped the roadway and flowed east affecting the residents living on the of 121st east side Place SE. This SUMMer the residents at 19125 1210t Place SE are tilling in their open ditch while adding a 6-inch perforated coxiveySnce line connected by a series of lawn drains as part of their detached garage'construction, The compl.ai=a.ant believes the integrity of the drainage system will be severely compromised and future flooding may result from these activities. • FTbrnlNGs ; Since the problem meets all of the ND AP riteria below, it qualifies for and has been punder ject Cthe investigated NDAplist r Pzog='am . The problem site is within the SWM service area and does involve a Icing County (KC) not code violation. 1 . i . L. U" LU •-+lnI -i rV- WLlCL 1 n 1 1-1 • The problem site shows eviddnce of or reported Iacalized flooding, erosion and/or Sedimentation within the of£ road drainage system ou private residential and/or commercial Property due to' later upstream development. The problem is canned by surface water from more than one adjoining property. SOILS According to the RC sails mapo the site is laca,ted in the following soil association: AL,DERWOOD ASSOCIATION: Moderately well drained undulating to hillx soils that have dense, very sl.awly permeable glacial till, at a- depth Of 20 to 40 inches; on uplands and terraces. OPTIONS AND D:CSC17ssIQN: s 1. An enforcement letter can be sent to the aforementioned residents wM filled in the opt ditch system. The letter will ask for their cooperation in ,removing the conveyance systems so the open ditches be restored to function as designed. >D�TFORCRT MWACT SCORE . 40- PROMS= SOLpT24Na An enforcement letter will be sent. MWORG'fsfUM PRIORITY SCORE = 40 2 ,1�L. x . ���-. ��- ��.:.. ..�. wuw i iv. d,» � . lei• i o Kind Candounty Water nand Resources Division teP1Lgmenc OCNatural Rewurees "DO RAIL Avrwe, Suite ?too Seattle, WA 99104-•5p2,Z ('206) ssB�siB MG) ZSS-0192 FAX September 16, 19,97 David Gibson 19125 121" Place SE Renton, WA 98058-7237 RE; - - Dear Mz. Gibsan, On $vtember 2, 1997, Water and land Resources (WU) Division' staff drainage problem reported in your neighborhood. Our investigation fd a of the existing storm water facility is being reduced by the installation of the drainage ound that the investigated ake sysactt In found in the roadside drainage ditch fronting your property. "Die drainage ditches were established to detain and infiltrate as well as convey storm water. Filling in the ditches may detract from Their ability to control the conveyance of storm water flows, sending water onto the roadway and Your neighbors properties. This presents a hazard to public safety. you 1 may not be aware that, as property owner, you could be liable for an Property damage that results from #his condition. Y personal injury qr ' We recommend that you remove the closed pipe conveyance system found in the, roadside ditch fronting your property to help resolve this condition. ' This letter is not an enforcement action or a notJfcation of ,violation of King County law. Its purpose is to bring flats drainage problem to your attention $o you can take action before it becomes ,more serious. If you would like, more information about this drainage Problem, assistance in resolvin it lease call Jeff 7acobson, '� LR Division rLocal D g ' p rainage Services Unit Engineer, at 296-1953. Thank you for your attention to this matter. Sincerely, Curt W. Crawford, p.E,, u ' F g Engineer Loral Drainage Serc►ioes nit CC.JJ:in,a3o ' cc: Glenn Evans, P.E'., Sexjior Engineer, local Drainage Services Unit Formerly SY face Water Mans ement Ut_L. 1 . ZU"4 1U- 4�H"1 KC WLRD NO. 039 P. 11/1 UU COPY MKirzg County Water and "nd.Resourtes Division ' Dgartmera of Natural gmaurca . 700 FSfth Avemm, Suite Z200 seatue, wA 9010¢5oz2 (,206) ZqG-B$I9 (206) 296_0192 FAX - September• 16, 1997 G y 19I 3 12� Place Southeast ' Menton, WA 98058-?237 RIB; M r, o ci _ Dear m. vapgo: On September 2, 1997, Wafter and ,Land Resoutrces drainage problem (LR) iivision, staff investigated a rted in your neighborhood. Our investigation found the of the existing storm water facility has been reduced by the installation of the draine Capacity tern found in the old roadside ditch system fronting our property. The established to detain and infltrate as well as conveywater. Filling Se dxtehes ware detracts from their ability to control. the conveyance of storm water flows, sending water onto the roadway and your neighbors' properties. This presents a hazard to public safety. You may not be aware that, as property owner, you could be liable for an or property damage; that results from this condition. y Personal in,�ury VP We recommend that you remove the closed -pipe conveyance system fronting your property and re-establish the drainage ditch system to resolve this condition. ' This letter is not an enforcement action or a notification of violation of King County law, its purpose is to bring this drainage problem to your attention so you can take action before it becomes more serious. If you would like more information about this drainage problem, or would like technical assistance in resolving It, please call Jeff Jacobson ' Unit Engineer, at 296-1953. Tbank you for your attention this s m �,ocal n�ge Services Sincerely, Curt Vjr, Crawford, P.E., pervi g Engineer . tLlocal Drainage S�ces zdt M' Glenn Evans,, P.E., Senior Engineer, Local Drain• a Servic es ces Unit = Former iY Sw am Water Managamem (SWM) Division LLl-. 1 . G'UYJ'i 1LFJ• �i 7t-il-1J.\\F Y�4 1'JLi'G 1 ■1 L'a 7. #,'rl�, �'�,[��} L� 1 V L1 i�S.L' �7 1yV • `U J,J MSION i DRAINAGE LNYFSTIGATZON REPORT.' Page 1: JNVESTIGATIDN REQUEST �ROBL 1 "ECE VED BY: �• G Date: ? QK'd by - Received from: Type ! �` -136i NArvu;: (Day) L __j (Eve) PHONE AnDREss: City -�rru .�1 Statc tn.J -A Zip ` Pcp Location of Problem, if different: 12 Reported Problem: CALL F'URST LJ (Would LEce To Be present) - e""`Tlol 984,58?ZZ7 . name: 4. Oe-�65ferg Gardevr ��e : v. 5 Other agencies involved: q Lot No: `l Block -No. - No field investigation required 1 �T R � -- Parcel No, 19 ` �. f �� 1 ¢ Kroll _d,&5 UJ Th.Sros: New Council District q _ Old 4? r:. Charge No. YW R�sPONSE: Citizen notified on bY: — phone letter in person T"o 41 r ! l �T � /� �' . 1 AIsPosrTTON: Turned to ' on / / by OR: No further action recommended because: Lead agency has been notified; Problem has Neon corrected. No problem has been identhried. Prior roves ' anon addresses prflblenn: Private problem - NDAP will ' of SEE r�uE N !/ 7 n conaiaEr because: - Water originates onsite and/or on neighboring parcel. Location is outside WLRD Se ' —Other (Specify)- A fY) ATE CLOSED: 1 / By: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I 1 KING C4UNTy Dopertment of Natural RQaouroon Water and Land Rosourao DMajon DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION FILE xo. 97-1301 NAME ANONYMOUS___... - Ar DRESS 19125 - 121 ST PL SE PHONE Tu pAou 686-F2 XROLL PAGE 605W DATE, 7-25-97 MAIliT DIVISION lNrrLALs - MAM DETALLS OF INVESTIGATION: SITE VISIT ON 7.24-97. PROPERTY OWNER AT 16125 - 121ST PL SE FILuNQ IN DRAINAGE DITCH WITH 00 PERF. 1NVESTICATION FOUND 12157 PL SE IS A PRIVATE ROAD WITH AN OPEN DITCH om THE WEST SIDE OF THE STREET, THE PROPERTY OWNER AT 111129 IS IN THE PROCEffiS OP INSTALLING A am PERF PIPE WITH DRAIN BOXES IN THE DITCH IN FRONT OF THEIR PROPERTY. THE EXISTING DRIVEWAY CULVERTS ARE 10' CONCRM. FURTHER INVESTIGATION FOUND A CONTROL STRUCTURE WHICH SERVICES THE DRAINAGE DITCH. IT APPEARS THE PROPERTY OWNER AT 19133 - 12%ST PL SE HAS FILLED IN His M0110N OM DITCH SMITH a• PERF PIPE. PROPERTY OWNERS MAY BE REDUCINQ THE STORME VOLUME WITHIN THE DITCH BY FILLING. SKETCH: COMPLAINT CLOSED TO 97-1179 SE 192ND ST �4�IG i:u� Nl�' WATER LAIITD RE p �u. Vey ' S URCES Div lox_, DRAINAGE INVESTIGATION REPORT P�o$i:�,,s: A rA Pags 1: INVESTIGATION REQUEST ' th�r1��J �� I 1 CEIVED $ Y: ,v, i-f H I O Gam- Date: '5I Z�! q D 1 1' eceived from: r'. 14/1 A-, . Type NAME: Fv- .S kUV, (Day) C_ (Eve) rr PHONEZ"•77�5.Zl AIJDREs5: � (o � � �. � � � �' � L - City �NT�iu State�/d"D � Zip _ Location ofproblem, ifdifferent: �` , J cp" 1 Reported Problem: CALL FIRST ❑ (Would Like To Be Present) T 6 v.j S h,�� �4 ,� p" �) w ` . ►�.�P�r u a- t'�t �, , ►�-� 1 w .� I i ke i 1 5) P­ ..,tame: u l LC GfJ W��". G � -4, H- G I V A ef�V v� e4s n � L e­L C,lti JO !J S Lot No: Other agencies involved: Block No: No field investigation required/_ �� TO BE (initials) C01VII? gV COMI'LATI T MOGRAM STAFF Parcel No.-!5A�3 Za 6,11oll f�� Q t—Th,Bros: Netivfo .� Basing Old � (a Council District � Charge No. RESPONSE.' Citizen notified on 4e-11- l4' by., _.-'K— phone letter in person G+ ess r,� Cam, Ji/ Q�l�l�ll�Gr �: �►f.+as .��� �rrt`rC� �i�P�r f��.� FL�ih�FT7�e. �riou�� �F J fl`dr6, h/NOu� ,g�}5 Al, r ra iLpr� fj, .boas'!2i i/CIPAie� r�E��J/�S.�rf�" dap Y. a •fir �?�.srx.� ria.�. Ao Acr rDISPOSMON: Turned to on I ! by OR: , No farther action recommended because: Leas} agency leas been notified, Problem has been corrgcted. No problem has been identified. Prior investigation addrosse5 problem; ' 7 Private problem - NDAP will riot consider because: SEE TILE # T� Water originates onsite and/or on neighboring parcel, Location is outside WLRD ea. ��Other (S ecify): By: ATE CLOSED- � / ! � 7- rla- ` _1r ' 1/4 S T R DL(-. 1 . L004 1U: 44HM ' KU WLHL1 Hu. d�lj .r. 15/ lC� KING COUNTY WATER AND LAND RESOURCES DIMjoN �r I DRAwAGE YNVESTMATxoN REP07.tT / P�tosz. t: i /N Pagel: INVBSMMNREQMT Type - ��TGc �41'�6)P Oil' b • D / I Received from; 0 (Day) i? (Eve) Nam: 2 PHONE ADDRESS:ST 142CS City c2VTOrt! Stale 6J,4 zip Location of problem, if different: .Reported Prvhlew CALL Fi Lvr, (Would L*eTo Ba Present) r.�r-� ��.� �� �..r � f�Q � /S���F� /i��-•1 si�S Tc�r� r n�. � g �.i o ejev o-AL SC IgzJ w .IZ, 7, 17K,/3D/' ` mo t 04 a d M S 4�4Vq-. .riat name: �� �� �'az.�C�..� .�� C�+�r-�1 �I oa �Ci +� Lot No: q / Block Na: ' Other agencies involved: -- No field investigation required k Puce, No. Krou 6jav Th.Bros: New i IBasin M Council Disuict Charge'No. Old .RESpOm—': Citizen notified on by: phone letter _2_ in person RZ5 i J-. RQA,DS ivIX,04A/ Ta e&e?.R 2>,e,5W.g Lc APrrr S'6 /0444.ST DMPosYTrrnv's 'hinted to _ on by. OR; No further action recommended because: .- Lead agetncy has been notified: � 4.,/Df L/ 4— Problem has bees canwted< No problem has been identified. � Prior investigation addresses problem: Private problein - NDAP will not consider because: sEE F= # .Water 04nates onsite and/or on neighboring parcel. DATE Location is outside �?U'I..RD ServiOther (Specify): ' CLOSED: i By; . 1.�_-KAO"_I✓J-�E7HI'L_ _M_ WLKI) - KING COUNTY DOPartment of Natural Resources Water and Land Resource Division DRAINAGE INVESTIGATION REPORT FIELD INVESTICaIATION - ....., NO. H:3H P. 16/18 Ez--ENO, 98-0926 NAME GA€iY VANGO ADDRL-SS 19193 - 121ST PL Srz PHONE(U3 8 -2B TB PACE KROLL PAaF_ BO6W I)A`rF, 1zz-ss MAINT. DYVISiON 4 DTFn° - MAM DETAXS Of INVPSTiGATION, SITE VISIT ON Y-12,Bg, STREET DRAINAGE SLOCKED CAUSING DRAINAGI~ SYSTEM ON PRIVATE ROAD ip BACK Up - INVESTIGATION FOUND THE DRAINAGE SYSTEM ON 121ST PI- SE HAS A CONTROL STRUCTURE WHICH BRAINS TO A CATCH BASIN 1N THE ROAD RIGHT -OP -WAY. THE SLIDE GATE F013 THE SYSTEM WAS OPEN YRE W CHALLDRAINS FOR WATER TO DRAINAGE LOW INTO E 192 IR FROM STREET CATCH BASIN, CLOSED SLIDE GATE AT THIS TIME. lNSPECTBD STREET IVTS 17RAINAQE ON SE 1S2ND 8T JUST EAST OF 121ST PL SE FOR ANY BLOCKAcir;. WHEN LIME WAS CANDLED LIGHT REFLECTED BACK. THERE APPEARS TO BE A METAL OBJECT ABOUT a0' 13OWN THE LINE, TALKED TO COMPLAINANT IT WAS SUQGESTED SLIDE GATE BE KEPT CLOSED TO PRIIVENT A BACK WASH INTO PRIVATE SYSTEM, MENTIONED A MEMO WOULD BE SENT TO ROADS TO HAVE THEM INVESTIGATE OBJECT IN PIPE. NO PHOTOS TAKEN w SKETCH-. GAt M= PIPE P rm SOME TtlPE OP al,oc"GE ' SIE 192ND ST LIGHT ReFI..ECTsn SACK i I 1 i /' t3Lt,. L . C-U J" let' 4->Hi-j ML- HL-MV „'�+o- IYU. Bill' KING COUNTY WATER AND LAND REsourncEs D"ION DRAINAGE INVESTIGATION REPORT H.If/lci '9C-- PROBLEM: !'NVESTTGATIQN REQUEST Received from: I and � (Day) L�a� NAMI�; 00 PHQNIr ff;a— '� 1 Type —L` 63"7'd (Eve) L_.__) State _,Zip —q2l)4' LOCATION OF PROBLEM, IF DIFFERENT - Access Perngssion Granted ® Call Firer (Would L11ce To � Be Present) h r f✓ V7a N�'3 4,9 4�1 ' i rwh ry ua4?,r w At ban d6l�IO FTW/7j�. k lat nazne: Plat agencies involved: Y4 S '�SPONSE: Lot No: Block No. - No field investigation 2-7-- 5 T R Parcel No. Kroll Tb.1310s: NewA Y& g Basin` Council District Charge No, Citizen notified on ' S - a a by: phone letter L.," in person +D 4 Vn 1 r OSYTION: Tumed to on ! / by OR- No further action recommended because: Lead agency has been notified: Problein has been corrected. No problem has been identified. Prior investigation addresses problem: 'LC private problem - NDAP will not consider because: SEE 1I,IS # ry Water originates ansite and/or on neighboring parcel. Location is outside WLRD S ice ea. Ark CLOSED. v G By: /LOther (Specify)° Complaint 00-0398 Mondragon Investigated by Robert Manes cn 5 -3 1 .00 I met with Richard Mmdragon and I exPUMOd to him that the emsting drainage had be,= in for some time and the Road Dept. would not change it. Richard explained to me what he wants to do. Hi� wants to put m all access road from. the street to his garage I told him he would have to apply for a grading permit. I gave him thiD DDES handouts with an information sheet with phone numbers and address. I suggested that he iry to avoid felling in the low area where the water backs up from the drainage, as that may tnager i drainage review on his permit. I cloged with him on site_ I r 12"CMP = 10=1111 SE 192"A St, 301. MIP NTS 11 TASK 5 MITIGATION OF EXISTING AND POTENTIAL PROBLEMS 1 1 TASK 5 MITIGATION OF EXISTING AND POTENTIAL PROBLEMS ' The area downstream of the proposed project known as Laurel Springs does not exhibit any potential problems, nor is there evidence of any existing problems in this downstream drainage course. Since the KCSWDM has indicated that Basic Water Quality and Level 2 Flow Control are the required means of treating and detaining runoff, this project assumes that those are adequate for this site. This project will neither aggravate nor create a problem as specified in the problem specific mitigation requirements as set forth in Section 1.2.2.1 of the KCSWDM as delineated in Task 4 of this report. A Level 2 or Level 3 Off -Site Analysis should not be required for this project site as there is no evidence of existing or ' potential problems identified in this Level l analysis. In addition, the project site is not flat; however, the downstream drainage course is not very steep compared to the site. There is a broad drainage course with existing wetland areas through which Soos Creek has a lot of room to meander. The 100-year floodplain 1 for Socs Creek is a good b to 8 feet lower than the lowest point on the project site. The project site does not contribute more than 15 percent of the total peak flow drainage downstream from the site. In addition, since the project site is known to be an erosion sensitive area, special measures will have to be instituted during construction to keep sediment from traveling off site. Those measures will be addressed in the Technical Information Report prepared for this development. 1 71 t taia.00s_doc EJpJltcpl E APPENDIX 1 1 EXHIBIT L Detention Sizing Calculations Ll Pond Sizing Criteria Ist) Pre -developed site = 4.44 acres of till forest 2nd) Developed site Roads and sidewalk = 34,254 SF impervious For the lots, the maximum permitted lot coverage = 70 percent Lots = 138,700 x 70 percent = 97,090 SF impervious Therefore lot landscaping = 138,700 x 30 percent = 41,610 till grass Pond = 14,000 SF impervious Gravel access road = 6,600 x 50 percent eff. imp. area = 3,300 SF impervious And 3,300 SF till grass Total Impervious = 148,644 SF = 3.41 acres and till grass = 44,910 SF = 1.03.acres 4.44 acres 11418.008.doe [JPJAep] Pi o ,04zo J /— q—oa ; KCRTS Command ------------- CREATE a new Time Series L�vP/i L �J0�1 Ct7�� ------------------------- Production of Runoff Time Series Project Location Sea-Tac Computing Series 11418pre.ts€ Regional Scale Factor 1.00 Data Type : Reduced Creating Hourly Time Series File Loading Time Series File:C:1KCSWDM\KC_DATA`STTF60R_rnf Till Forest 4.44 acres -------------- Total Area 4.44 acres Peak Discharge: 0.358 CFS at 9:00 on Jan 9 in Year 8 Storing Time Series File:11418pre.tsf Time Series Computed KCRTS Command ------------- Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:11418pre.tsf Flow Frequency Analysis -------------------------------------------------------- Time Series File:11418pre.tsf Project Location:Sea-Tac Frequencies & Peaks saved to File:11418pre.pks Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command ------------- CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location Sea-Tac Computing Series 11418dev.tsf Regional Scale Factor 1.00 Data Type Reduced Creating Hourly Time Series File Loading Time Series File:C:\KC_SWDM\KC_DATA\STTG60R.rnf Till Grass 1.03 acres Loading Time Series File:C:1KC_SWDM\KC_DATA\STEI60R.rnf Impervious 3.41 acres -------------- Total Area 4.44 acres Peak Discharge: 1.83 CFS at 6:00 on Jan 9 in Year 8 Flow Frequency Analysis Time Series File:11418pre_tsf Project Location:Sea-Tac ---Annual Peak Flow Rates --- Flow Rate Rank Time of Peak (CFS) 0.280 2 2/09/01 18:00 0.076 7 1/06/02 3:00 0.207 4 2/28/03 3:00 0.007 8 3/24/04 20:00 0.123 6 1/05/05 8:00 0.215 3 1/18/06 21:00 0.181 5 11/24/06 4:00 0.358 1 1/09/08 9:00 Computed Peaks 1 -Flow Frequency Analysis - - Peaks - - Rank Return Prob (CFS) Period 0.358 1 100.00 0.99C 0.280 2 25.00 0.950 0.215 3 10.00 0.900 0.207 4 5.00 0.800 0.181 5 3.00 0.667 0.123 6 2.00 0.500 0.076 7 1.30 0.231 0.007 8 1.10 0.091 0.332 50.00 0.980 Flow Frequency Analysis Time Series File:11418dev.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates --- Flow Rate Rank Time of Peak (CFS) 0.919 6 2/09/01 2:00 0.775 8 1/05/02 16:00 1.10 3 2/27/03 7:00 0.869 7 8/26/04 2:00 1.04 4 10/28/04 16:00 0.978 5 1/18/06 16:00 1.26 2 10/26/06 0:00 1.83 1 1/09/08 6:00 Computed Peaks I 1 1 -----Flow Frequency Analysis------- - - Peaks - - Rank Return Prob (CFS) Period 1.83 1 100.00 0.990 1.26 2 25.00 0.960 1.10 3 10.00 0.900 1.04 4 5.00 0.800 0.978 5 3.00 0.667 0.919 6 2.00 0.500 0.869 7 1.30 0.231 0.775 8 1.10 0.091 1.64 50.00 0.980 1 Flow Frequency Analysis Time Series File:11418rdout_tsf Project Location:Sea-Tac ---Annual Peak Flow Rates --- Flow Rate Rank Time of Peak (CFS) 0.242 2 2/09/01 20:00 0.059 7 1/07/02 4:00 0.194 3 3/06/03 22:00 0.051 8 8/26/04 7:00 0.059 6 1/08/05 5:00 0.136 5 1/19/06 0:00 0.193 4 11/24/06 8:00 0.917 1 1/09/08 10:00 Computed Peaks -----Flow Frequency Analysis------- - - Peaks - -- Rank Return Prob (CFS) (ft) Period 0.917 6.13 1 100.00 0.990 0.242 6.00 2 25.00 0.960 0.194 5.33 3 10.00 0.900 0,193 5.32 4 5.00 0.800 0.136 4.46 5 3.00 0,667 0.059 3.99 6 2.00 0.500 0.059 3.90 7 1.30 0.231 0.051 2.89 8 1.10 0.091 0.692 6.10 50.00 0.980 r] 1 Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 2.00 H:1V Pond Bottom Length: 126.00 ft Pond Bottom Width: 64.00 ft Pond Bottom Area: 8064. sq. ft Top Area at 1 ft. FB: 14168, sq. ft 0.325 acres Effective Storage Depth: 6.00 ft Stage 0 Elevation: 386.00 ft Storage Volume: 63216. cu. ft 1.451 ac-ft Riser Head: 6.00 ft Riser Diameter: 18.00 inches Number of orifices: 2 Full Head Pipe Orifice 4 Height Diameter Discharge Diameter (ft) (in) (CPS) (in) 1 0.00 1.05 0.073 2 4.00 2.00 0.153 4.0 Top Notch Weir: None Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation Surf Area (ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) (sq. ft) 0.00 386.00 0. 0.000 0.000 0.00 8064. 0.01 386.01 81, 0.002 0.003 0.00 8072. 0.02 386.02 161. 0.004 0.004 0.00 8079. 0.03 386.03 242, 0.006 0.005 0.00 8087. 0.04 386.04 323. 0.007 0.006 0.00 8094_ 0.05 386.05 404. 0.009 0.007 0.00 8102, 0.07 386.07 566. 0.013 0.008 0.00 8117. 0.08 386.08 648. 0.015 0.008 0.00 8125. 0.09 386.09 729. 0.017 0.009 0.00 8133. 0.19 386.19 1546. 0.035 0.013 0.00 8209, 0.29 386.29 2371. 0.054 0.016 0.00 8286. 0.39 386.39 3203. 0.074 0.019 0.00 8363. 0.49 386.49 4043. 0.093 0.021 0.00 8440. 0.59 386.59 4891. 0.112 0.023 0.00 8518. 0.69 386.69 5747. 0.132 0.025 0.00 8596. 0.79 386.79 6610. 0.152 0.026 0.00 8674. 0.89 386.89 7482. 0.172 0.028 0.00 8753_ 0.99 386.99 8361. 0.192 0.030 0.00 8832. 1.09 387.09 9248. 0.212 0.031 0.00 8911, 1.19 387.19 10143, 0.233 0.032 0.00 8991. 1.29 387.29 11046. 0.254 0.034 0.00 9071. 1.39 387.39 11957. 0.275 0.035 0.00 9151_ 1.49 387.49 12877. 0.296 0.036 0.00 9232, 1.59 387.59 13804. 0.317 0.038 0.00 9313. 1.69 387.69 14739. 0.338 0.039 0.00 9394. 1.79 387.79 15683. 0.360 0.040 0.00 9476. 1.89 387.89 16634, 0.382 0.041 0.00 9558. 1.99 387.99 17594. 0.404 0.042 0.00 9640. 2.09 388.09 18562_ 0.426 0,043 0.00 9722. 2.19 388.19 19539. 0.449 0.044 0.00 9805. 2.29 388.29 20523. 0.471 0.045 0.00 9888. 2,39 388.39 21516, 0.494 0.046 0.00 9972. 2.49 388.49 22518. 0.517 0.047 0.00 10056. 2.59 388,59 23528. 0.540 0.048 0.00 10140. 2.69 388.69 24546. 0.563 0.049 0.00 10224. 2.79 388.79 25572. 0.587 0.050 0.00 10309. 2.89 388.89 26607, 0.611 0.051 0.00 10394_ 2.99 388.99 27651. 0.635 0,051 0.00 10479_ 3.09 389.09 28703, 0.659 0,052 0.00 10565. 3.19 389.19 29764. 0,683 0.053 0.00 10651. 3.29 389.29 30834. 0,708 0.054 0,00 10738. 3.39 389.39 31912. 0.733 0,055 0.00 10824. 3.49 389.49 32999. 0.758 0.056 0.00 10911. 3.59 389.59 34094. 0.783 0.056 0.00 10999. 3.69 389.69 35198. 0.808 0.057 0.00 11086_ 3.79 389.79 36311, 0.834 0.058 0.00 11174, 3.89 389.89 37433_ 0,859 0.059 0.00 11263, 3.99 389.99 38564_ 0,885 0,059 0.00 11351, 4.00 390.00 38677. 0.888 0,060 0.00 11360. 4.02 390,02 38905. 0.893 0.061 0.00 11378, 4.04 390.04 39132. 0.898 0.063 0.00 11396. 4.06 390.06 39361. 0.904 0.067 0.00 11413. 4.08 390.08 39589. 0.909 0.073 0.00 11431. 4.10 390.10 39818, 0.914 0.081 0.00 11449. 4.13 390.13 40162. 0,922 0.089 0.00 11476_ 4.15 390.15 40391. 0.927 0.099 0.00 11494. 4.17 390.17 40621. 0.933 0.105 0.00 11511. 4.27 390.27 41777. 0,959 0.118 0.00 11601. 4.37 390.37 42942. 0.986 0.128 0.00 11691. 4.47 390.47 44115, 1.013 0.137 0.00 11781. 4,57 390.57 45298_ 1.040 0,145 0,00 11871, 4.67 390.67 46489. 1.067 0.153 0.00 11962_ 4.77 390.77 47690. 1.095 0.160 0.00 12053. 4.87 390.87 48900. 1.123 0.167 0.00 12145. 4.97 390.97 50119. 1.151 0.173 0.00 12236. 5.07 391.07 51347. 1,179 0.179 0.00 12328, 5.17 391.17 52585. 1.207 0.185 0.00 12421. 5.27 391.27 53832. 1_236 0,190 0.00 12514. 5.37 391.37 55088. 1.265 0.196 0.00 12607. 5.47 391.47 56353. 1.294 0.201 0.00 12700. 5,57 391.57 57628. 1.323 0.206 0.00 12794, 5.67 391.67 58912. 1,352 0.211 0.00 12888, 5.77 391.77 60205. 1.382 0.216 0.00 12982. 5.87 391.87 61508. 1.412 0.220 0.00 13077. 5.97 391.97 62820. 1.442 0,225 0.00 13171. 6.00 392.00 63216. 1.451 0.226 0.00 13200. 6.10 392.10 64541. 1.482 0.693 0.00 13295. 6.20 392.20 65875. 1.512 1.540 0.00 13391. 6.30 392.30 67219. 1.543 2.640 0.00 13487. 6.40 392.40 68573. 1.574 3.940 0.00 13583. 6.50 392.50 69936, 1.606 5.410 0.00 13680. 6.60 392.60 71309. 1.637 6.840 0.00 13777. 6.70 392.70 72691. 1.669 7,370 0.00 13874. 6.80 392.80 74083. 1.701 7.870 0.00 13972. 6.90 392.90 75485. 1.733 8.340 0.00 14070. 1 fl 1 7.00 393.00 76897. 1.765 8.780 0.00 14168. 7.10 393.10 78319_ 1.798 9.200 0.00 14267. 7.20 393.20 79751, 1.831 9.600 0.00 14365, 7.30 393.30 81192, 1.864 9.980 0.00 14465. 7.40 393.40 82644, 1.897 10.350 0.00 14564. 7.50 393.50 84105_ 1.931 10.710 0.00 14664. 7.60 393.60 85576_ 1.965 11.050 0.00 14764. 7.70 393.70 87058. 1.999 11.390 0.00 14865. 7.80 393.80 88549. 2.033 11.710 0.00 14965. 7.90 393.90 90051. 2.067 12.030 0.00 15067_ Hyd Inflow Outflow Peak Storage Target Calc Stage Elev (Cu-Ft) (Ac-Ft) 1 1.83 ******* 0.92 6.13 392.13 64891. 1.490 2 0.92 0.28 0.24 6.00 392.00 63263. 1.452 3 1.10 ******* 0.19 5.33 391.33 54645. 1.254 4 1.26 ******* 0.19 5.32 391.32 54487. 1.251 5 0.98 ******* 0.14 4.46 390.46 44036. 1.011 6 1.04 ******* 0.06 3.99 389.99 38611, 0.886 7 0.78 ******* 0.06 3.90 389.90 37559_ 0.862 8 0.87 ******* 0.05 2.89 388.89 26561. 0.610 ---------------------------------- Route Time Series through Facility Inflow Time Series File:11418dev.tsf Outflow Time Series File:11418rdout Inflow/outflow Analysis Peak Inflow Discharge: Peak Outflow Discharge; Peak Reservoir Stage: Peak Reservoir Elev: Peak Reservoir Storage: 1.83 CPS at 6:00 on Jan 9 in Year 8 0.917 CPS at 10:00 on Jan 9 in Year 8 6.13 Ft 392.13 Ft 64891. Cu-Ft 1.490 Ac-Ft Plow Frequency Analysis Time Series File:11418rdout_tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CPS) (CPS) (ft) Period 0.242 2 2/09/01 20:00 0.917 6.13 1 100.00 0.990 0.059 7 1/07/02 4:00 0.242 6.00 2 25.00 0.960 0.194 3 3/06/03 22:00 0.194 5.33 3 10.00 0.900 0.051 8 8/26/04 7:00 0.193 5.32 4 5.00 0.800 0.059 6 1/08/05 5:00 0.136 4.46 5 3.00 0.667 0.136 5 1/19/06 0:00 0.059 3.99 6 2.00 0.500 0.193 4 11/24/06 8:00 0.059 3.90 7 1.30 0.231 0.917 1 1/09/08 10:00 0.051 2.89 8 1.10 0.091 Computed Peaks 0.692 6.10 50.00 0.980 Flow Duration from Time Series File:11418rdout.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS % % % 0.003 28017 45.690 45.690 54.310 0.543E+00 0.010 5992 9.772 55.462 44.538 0.445E+00 0.017 5665 9.238 64.700 35.300 0.353E+00 0.024 5253 8.567 73.266 26.734 0.267E+00 0.031 5042 8.222 81.489 18.511 0.185E+00 0.037 4183 6.822 88.311 11.689 0.117E+00 0.044 2863 4.669 92.979 7.021 0.702E-01 0.051 1737 2.833 95.812 4.188 0.419E-01 0.058 1822 2.971 98.783 1.217 0.122E-01 0.064 375 0.612 99.395 0.605 0.605E-02 0.071 23 0.038 99.432 0.568 0.568E-02 0.078 14 0.023 99.455 0.545 0.545E-02 0.085 15 0.024 99.480 0.520 0.520E-02 0.092 17 0.028 99.507 0.492 0.492E-02 0.098 7 0.011 99.519 0.481 0.481E-02 0.105 18 0.029 99.546 0.452 0.452E-02 0.112 33 0.054 99.602 0.398 0.398E-02 0.119 23 0.038 99.640 0.360 0.360E-02 0.126 33 0.054 99.693 0.307 0.307E-02 0.132 29 0.047 99.741 0.259 0.259E-02 0.139 22 0.036 99.777 0.223 0.223E-02 0.146 16 0.026 99.803 0.197 0.197E-02 0.153 7 0.011 99.814 0.186 0.186E--02 0.159 10 0.016 99.830 0.170 0.170E-02 0.166 14 0.023 99.853 0.147 0.147E-02 0.173 11 0.018 99.871 0.129 0.129E-02 0.180 14 0.023 99.894 0.106 0.1.06E-02 0.187 12 0.020 99.914 0.086 0.864E-03 0.193 17 0.028 99.941 0.059 0.587E-03 0.200 10 0.016 99.958 0.042 0.424E-03 0.207 10 0.016 99.974 0.026 0.261E-03 0.214 4 0.007 99.980 0.020 0.196E-03 0.221 5 0.008 99.989 0.011 0.114E-03 0.227 6 0.010 99.998 0.002 0.163E-04 0.234 0 0.000 99.998 0.002 0.163E-04 0.241 0 0.000 99.998 0.002 0.163E-04 Duration Comparison Anaylsis Base File: 11418pre.tsf New File: 11418rdout.tsf Cutoff Units: Discharge in CFS -----Fraction of Time----- --- ---------Check of Tolerance------- CutoffBase New %Change Probability Base New %Change 0.062 f 0.94E-02 0.63E-02 -32.7 0.94E-02 0.062 0.059 -5.1 0.079 j 0.62E--02 0.54E-02 -12.9 0.62E-02 0.079 0.063 -20.4 0.096 0.49E-02 0.49E--02 1.0 0.49E-02 0.096 0.097 1.6 0.113 0.37E-02 0.40E-02 8.9 0.37E-02 0.113 0.118 4.9 0.129 0.28E-02 0.28E-02 -0.6 0.28E-02 0.129 0.129 -0.4 0.146 0.22E-02 0.20E-02 -9.7 0.22E-02 0.146 0.140 -4.1 0.163 0.15E--02 0.16E-02 11.2 0.15E-02 0.163 0.168 2.7 0.180 0.96E-03 0.11E-02 10.2 0.96E-03 0.180 0.184 2.1 0.197 0.60E-03 0.51E-03 -16.2 0.60E-03 0.197 0.193 -1.7 0.214 0.34E-03 0.20E-03 -42.9 0.34E-03 0.214 0.204 -4.7 0.230 0.21E-03 0.16E-04 -92.3 i 0.21E-03 0.230 0.213 -7.5 0.247 0.16E--03 0.00E+00 -100.0 f 0.16E-03 0.247 0.217 -12.1 0.264 0.82E-04 0.00E+00 -100.0 0.82E-04 0.264 0.224 -15.1 Maximum positive excursion = 0.006 cfs ( 5.9%) occurring at 0.098 cfs on the Base Data:11418pre.tsf ' and at 0.104 cfs on the New Data:11418rdout.tsf Maximum negative excursion = 0.017 cfs (-21.1%) ' occurring at 0-080 cfs on the Base Data:11418pre.tsf and at 0.063 cfs on the New Data:11418rdout.tsf 11 1 Flow Duration from Time Series File:11418pre_tsf Cutoff Count Frequency CDF Exceedence-Probability CFS % % % 0.062 60739 99.053 99.053 0.947 0.947E-02 0.069 116 0.189 99.242 0.758 0.758E-02 0.077 72 0.117 99.359 0.641 0.641E-02 0.085 39 0.064 99.423 0.577 0.577E-02 0.092 37 0.060 99.483 0.517 0.517E-02 0.100 40 0.065 99.548 0.452 0.452E-02 0.108 34 0.055 99.604 0.396 0.396E-02 0.115 30 0.049 99.653 0.347 0.347E-02 0.123 21 0.034 99.687 0.313 0.313E-02 0.131 20 0.033 99.720 0.280 0.280E-02 0.138 19 0.031 99.750 0.250 0.250E-02 0.146 19 0.031 99.781 0.219 0.219E-02 0.154 24 0.039 99.821 0.179 0.179E-02 0.162 17 0.028 99.848 0.152 0.152E-02 0.169 13 0.021 99.870 0.130 0.130E-02 0.177 15 0.024 99.894 0.106 0.106E-02 0.185 13 0.021 99.915 0.085 0.848E-03 0.192 10 0.016 99.932 0.068 0.685E-03 0.200 10 0.016 99.948 0.052 0.522E-03 0.208 7 0.011 99.959 0.041 0.408E-03 0.215 7 0.011 99.971 0.029 0.294E-03 0.223 2 0.003 99.974 0.026 0.261E-03 0.231 3 0.005 99.979 0.021 0.212E-03 0.239 2 0.003 99.982 0.018 0.179E-03 0.246 1 0.002 99.984 0.016 0.163E-03 0.254 1 0.002 99.985 0.015 0.147E-03 0.262 2 0.003 99.989 0.011 0.114E-03 0.269 3 0.005 99.993 0.007 0.652E-04 0.277 3 0.005 99.998 0.002 0.163E-04 0.285 1 0.002 100.000 0.000 0.000E+00 0.292 0 0.000 100.000 0.000 0.000E+00 0.300 0 0.000 100.000 0.000 0.000E+00 0.308 0 0.000 100.000 0.000 0.000E+00 0.316 0 0.000 100.000 0.000 0.000E+00 0.323 0 0.000 100.000 0.000 0.000E+00 0.331 0 0.000 100.000 0.000 0.000E+00 .11 Flow Duration from Time Series File:11418rdout_tsf Cutoff Count Frequency CDF Exceedence_Probability CFS 1� % % 0.003 28017 45.690 45.690 54.310 0.543E+00 0.010 5992 9.772 55.462 44.538 0.445E+00 0.017 5665 9.238 64.700 35.300 0.353E+00 0.024 5253 8.567 73.266 26.734 0.267E+00 0.031 5042 8.222 81.489 18.511 0.185E+00 0.037 4183 6.822 88.311 11.689 0.117E+00 0.044 2863 4.669 92.979 7.021 0.702E-01 0.051 1737 2.833 95.812 4.188 0.419E-01 0.058 1822 2.971 98.783 1.217 0.122E-01 0.064 375 0.612 99.395 0.605 0.605E-02 0.071 23 0.038 99.432 0.568 0.568E-02 0.078 14 0.023 99.455 0.545 0.545E-02 0.085 15 0.024 99.480 0.520 0.520E-02 0.092 17 0.028 99.507 0.492 0.492E-02 0.098 7 0.011 99.519 0.481 0.481E-02 0.105 18 0.029 99.548 0.452 0.452E-02 0.112 33 0.054 99.602 0.398 0.398E-02 0.119 23 0.038 99.640 0.360 0.360E-02 0.126 33 0.054 99.693 0.307 0.307E-02 0.132 29 0.047 99.741 0.259 0.259E-02 0.139 22 0.036 99.777 0.223 0.223E-02 0.146 16 0.026 99.803 0.197 0.197E-02 0.153 7 0.011 99.814 0.186 0.186E-02 0.159 10 0.016 99.830 0.170 0.170E-02 0.166 14 0.023 99.853 0.147 0.147E-02 0.173 11 0.018 99.871 0.129 0.129E-02 0.180 14 0.023 99.894 0.106 0.106E-02 0.187 12 0.020 99.914 0.086 0.864E-03 0.193 17 0.028 99,941 0.059 0.587E-03 0.200 10 0.016 99.958 0.042 0.424E-03 0.207 10 0.016 99.974 0.026 0.261E-03 0.214 4 0.007 99.980 0.020 0.196E-03 0.221 5 0.008 99.989 0.011 0.114E-03 0.227 6 0.010 99.998 0.002 0.163E-04 0.234 0 0.000 99.998 0.002 0.163E-04 0.241 0 0.000 99.998 0.002 0.163E-04 1 Duration Comparison Anaylsis Base File; 11418pre.tsf New File: 11418rdout.tsf Cutoff Units: Discharge in CFS -----Fraction of Time------ ---- -------Check of Tolerance ------- CutoffBase New Change Probability Base New %Change 0.062 0.94E-02 0.63E-02 -32.7 0.94E-02 0.062 0.059 -5.1 0.079 0.62E-02 0.54E-02 -12.9 0.62E-02 0.079 0.063 -20.4 0.096 0.49E-02 0.49E-02 1.0 f 0.49E-02 0.096 0.097 1.6 0.113 0.37E-02 0.40E-02 8.9 j 0.37E-02 0.113 0.118 4.9 0.129 0.28E-02 0.28E-02 -0.6 0.28E-02 0.129 0.129 -0.4 0.146 0.22E-02 0.20E-02 -9.7 0.22E-02 0.146 0.140 -4.1 0.163 j 0.15E-02 0.16E-02 11.2 0.15E-02 0.163 0.168 2.7 0.180 0.96E-03 0.11E-02 10.2 0.96E-03 0.180 0.184 2.1 0.197 0.60E-03 0.51E-03 -16.2 0.60E--03 0.197 0.193 --1.7 0.214 0.34E-03 0.20E-03 -42.9 0.34E-03 0.214 0.204 -4.7 0.230 0.21E-03 0.16E-04 -92.3 0.21E-03 0.230 0.213 -7.5 0.247 I 0.16E-03 0.00E+00 -100.0 0.16E-03 0.247 0.217 -12.1 0.264 0.82E-04 0.00E+00 -100.0 0.82E-04 0.264 0.224 -15.1 Maximum positive excursion = 0.006 cfs ( 5.9%) occurring at 0.098 cfs on the Base Data:11418pre.tsf and at 0.104 cfs on the New Data:11418rdout_tsf Maximum negative excursion = 0.017 cfs (-21.1%) occurring at 0.080 cfs on the Base Data:11418pre.tsf and at 0.063 cfs on the New Data:11418rdout_tsf LA t King County Department of Development and Environmental Services Determination Of Non -Significance (DNS) for Wehrman (DDES File No. L04P0027) Date of Issuance: June 23, 2006 Project: Request is to subdivide 7.25 acres, zoned R-6 into 35 lots for single family detached residences and tracts for drainage, recreation and sensitive areas. The lots range from approximately 3,960-7,892 square feet. Location: The site is located south of SE 188`h St., west of 124`h Ave. South. King County Permits: Formal Plat County Contact: Chad Tibb its, Project Manager II chad.tibbits@metrol:c.gov (206) 296-7194 Proponent: Trinity Land Development, Attn. Chris Austin 310-29`h Street NE Puyallup, WA 98373 253-845-2922 Zoning: R-6 Community Plan: Soos Creek Drainage Subbasin: Soos Creek, WRIA 9 Section/Township/Range: 33-23-05 Notes: A. This finding is based on review of the project revised site plan, environmental checklist, and revised level one drainage analysis, and other documents in the file. B. The drainage facilities will be designed in accordance with the 1998 King County Surface Water Design Manual. C. Issuance of this threshold determination does not constitute approval of the permit. This proposal will be reviewed for compliance with all applicable King County codes which regulate development activities, including the Uniform Fire and Building Codes, Road Standards, Surface Water Design Manual, and the Critical Areas Regulations. WHITTAKER, BRUCE SR, ENGINEER DDES/LUSD M OAK -DE-0100 L04P0027 Wehrman L04P0027 June 23, 2006 Page 2 Threshold Determination The responsible official finds that the above described proposal does not pose a probable significant adverse impact to the environment. This finding is made pursuant to RCW 43.21C, KCC 20.44 and WAC 197-11 after reviewing the environmental checklist and other information on file with the lead agency and considering mitigation measures which the agency or the applicant will implement as part of the proposal. The responsible official finds this information reasonably sufficient to evaluate the environmental impact of this proposal. The lead agency has determined that the requirements for environmental analysis, protection, and mitigation measures have been adequately addressed in the development regulations and comprehensive plan adopted under chapter 36.70A RCW, and in other applicable local, state, or federal laws or rules, as provided by RCW 43.21C.240 and WAC 197-11-158. Our agency will not require any additional mitigation measures under SEPA. Comments and Appeals Written comments or any appeal of this threshold determination must be stamped received by King County before 4:30 PM on July 10, 2006. Appeals must be accompanied by a nonrefundable filing fee. Please reference the file numbers when corresponding. Appeals must be in writing and state the perceived errors in the threshold determination, specific reasons why the determination should be reversed or modified, the harm the appellant will suffer if the threshold determination remains unchanged, and the desired outcome of the appeal. If the appellant is a group, the harm to any one or more members must be stated. Failure to meet these requirements may result in dismissal of the appeal. Comment/appeal deadline: Appeal filing fee: Address for comment/appeal: Responsible Official: Li a Dinsmore, Supervisor Current Planning Section Land Use Services Division 4:30 PM on July 10, 2006 $250 check or money order made out to the King County Office of Finance King County Land Use Services Division 900 Oakesdale Avenue SW Renton, WA 98055-1219 ATTN: Current Planning Section Q.. 1 t 1 G fit? Date TD-LOGO 2/99 (i) Department of Development and Environmenta3 Services Land Use Services Division 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 File No.: L04P0027 Notice of Decision- SEPA Threshold Determination and Notice of Recommendation & Hearing Project Name: Wehrman Subdivision DDES Project Manager: Chad Tibbits, 206-296-7194 Email chad.tibbits@metroke.gov Applicant: Trinity Land Development Attn: Chris Austin 310 29th Street NE Puyallup, WA 98373 253-845-2922 Project Location: The site is located south of SE 18e St, west of 120 Ave So. Project Description: Subdivision of approximately T.25.acres into 35 lots for the development of single family detached residences in the R-6 zone. The proposed lots range in size from approximately 3,960 to 7,892 square feet. Permits Requested: Formal Subdivision Department.Recommendation to the Hearing Examiner: Approve, subject to conditions Date of Public Hearing: July 25, 2006 10:30 arrr DDES Hearing Room --'first floor 900 Oakesdale Ave SW Renton, WA 98055-1219 SEPA Threshold Determination: Determination of Non -Significance (DNS) Issued. June 23, 2006 The Department of Development and Environmental Services (DDES) will issue a written report and recommendation to the Hearing Examiner two weeks prior to the scheduled public hearing. Persons wishing to receive a copy of the report should contact DDES at the address listed below. Following the close of the public hearing, the Hearing Examiner will issue a written decision which may be appealed to the Metropolitan -King County Council. Appeal procedures will be stated in the Examiner's written decision. Any person wishing additional information on this proposed project should contact the project Manager at the phone number listed above. Written comments may also be submitted to DDES. A public hearing as required bylaw will be held to consider the approval of this application. If the Renton School District announces a district -wide school closure due to adverse weather conditions or similar area emergency, the public hearing on this matter will be postponed, Interested parties will be notified of the time and date of the rescheduled hearing. Any questions regarding postponements and rescheduling can be directed to the Hearing Examiner's Office at (206) 2964660. CommentlAppeal Procedure on SEPA Threshold Determination: Comments on this SEPA determination are welcome. This SEPA determination may also be appealed in writing to the King County Hearing Examiner. A notice of appeal must be filed with the Land Use Services Division at the address listed below prior to 4:30 p.m. on July 10, 2006, and be accompanied with a filing fee of $250.00 payable to the King County Office of Finance. If a timely Notice of Appeal has been filed, the appellant shall also file a Statement of Appeal with the Land Use Services Division at the address listed below prior to 4:30 p.m. on July 17, 2006. The Statement of Appeal shall identify the decision being appealed (including the file number) and the alleged errors in that decision. Further, the Statement of Appeal shall state: 1) specific reasons why the decision should be reversed or modified; and 2) the harm suffered or anticipated by the appellant, and the relief sought. The scope of an appeal shall be based on matters or issues raised in the Statement of Appeal. Failure to timely file a Notice of Appeal, appeal fee or Statement of Appeal, deprives the Hearing Examiner of jurisdiction to consider the appeal. Appeals must be submitted to the Department of Development and Environmental Seivices (DDES) at the following address: DDES--Land Use Services Division Attn: Permit Center 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 Date Mailed: June 23, 2006 If you have any questions regarding the appeal procedures, please contact the Planner at the phone number listed above. If you require this material in braille, audio cassette, or large print, call (206) 296-6600 (voice) or (206) 296-7217 (TTY). 1 1 LEVEL 1 OFF -SITE DRAINAGE ANALYSIS AND PRELIMINARY DETENTION SIZING CALCULATIONS Proposed Wehrman Property Plat NWC — 124th Avenue S.E. and S.E. 192nd Street King County, Washington JAN I Prepared for: Trinity Land Development, L.L.C. 315 — 39th Avenue S.W., Suite 6 Puyallup, Washington 98373 December 2, 2004 Revised November 9, 2005 Our Job No. 11418 MAIN HLE COPY Exhibit No.; Item No. Rer- -?d " 7 Kin,, .onty Heal CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES 18215 72Na AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX [ BRANCH OFFICES ♦ OLYMPIA, WA 1 TEMECULA, CA WALNUT CREEK, CA www.barghausen.com \`v 1 LEVEL 1 OFF -SITE DRAINAGE ANALYSIS AND PRELIMINARY DETENTION SIZING CALCULATIONS Proposed Wehrman Property Plat NWC -- 124th Avenue S.E. and S.E. 192nd Street King County, Washington Prepared for: Trinity Land Development, L.L.C. 315 -- 39th Avenue S.W., Suite 6 Puyallup, Washington 98373 December 2, 2004 Revised November 9, 2005 Our Job No. 11418 �RRv TACO WAS s Co0A(G ..V_- Z EX.PIRE3 10i 10i CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES - 18215 72NDAVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX BRANCH OFFICES ♦ OLYMPIA, WA ♦ TEMECULA, CA • WALNUT CREEK, CA ctT�Ne eNGtiHw��e www.barghausen.com TABLE OF CONTENTS TASK I STUDY AREA DEFINITION AND MAPS EXHIBIT A Vicinity Map EXHIBIT B Downstream Drainage Map EXHIBIT C Upstream Basin Map TASK 2 RESOURCE REVIEW EXHIBIT D FEMA Map EXHIBIT E Sensitive Areas Folios EXHIBIT F SCS Soils Map EXHIBIT G Assessor's Map EXHIBIT H Wetland Inventory Map EXHIBIT I Basin Reconnaissance Summary Report TASK 3 FIELD INSPECTION EXHIBIT J Off -Site Analysis Drainage System Table 3.1 Conveyance System Nuisance Problems (Type 1) 3.2 Severe Erosion Problems (Type 2) 3.3 Severe Flooding Problems (Type 3) TASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS EXHIBIT K Drainage Complaints TASK 5 MITIGATION OF EXISTING OR POTENTIAL PROBLEMS APPENDix EXHIBIT L Detention Sizing Calculations 11418-008.doe [JPJltepl TASK 1 STUDY AREA DEFINITION AND MAPS 1 TASK 1 STUDY AREA DEFINITION AND MAPS ' The proposed Wehrman property plat is approximately 7.2 acres located within a portion of the Southwest quarter of Section 33, Township 23 North, Range 5 East, Willamette Meridian, King County, Washington. More particularly, the site is located on the south side of S.E. 188th Street and west of the 124th Avenue S.E. extension. The enclosed Exhibit A — Vicinity Map depicts the approximate location of the proposed site. The existing topography of the site has slopes ranging from 5 percent up to almost 40 percent. A Bonneville Power Administration (BPA) transmission easement lies on the eastern portion of the project site and then diagonally bisects the northeast corner of the project site. Soos Creek and a large wetland area lie approximately 200- to 300-feet east of the project site. The area immediately west of the project site consists of existing residential developments. The existing conditions of the project site ' are such that most of the site is forested or brushy. The proposal for this development is to construct 34 lots with all lots being accessed from S.E. 188th Street_ Drainage facilities are proposed to be constructed along the eastern property line of the site adjacent to the existing wetland buffer. Elevation difference across the site is approximately 90 feet vertical difference with elevations at the far west end of the site around 468, and elevations at the far east property line around ±376. UPSTREAM DRAINAGE ANALYSIS ' Based on the [1SGS quad map and our site visit, it appears that there is upstream flow onto and through the site. Portions of the area lying west of the project site sheetflow through adjacent properties onto the ' project site. In addition, portions of the area west of the project site drain into S.E. 188th Street ditches where it is conveyed to the northwest corker of the project site, and then sheetflows to the north of the property down a steep slope under existing conditions. The total upstream basin is approximately 5 acres_ 1 I 11418.008.doc []P3ltep] F-j� EXHIBIT A Vicinity Map 1 1 -� ■ St 17m1 51 P� - ' sE rre �t J9rN n PARK 6 RIOE ,., 5 IPL Y 16TH -d yJTS Y r FS + SE 180TH 7 G SE 180TII S7 '�� C s4 1 Rp ti`5 �rq s< Eersr PT SE 179TH , NISJ �_ a .W SE 182HD SE 18151 PL 18IST ST t 5w�^� �� SE Si 57 �� J qa SE 108� S SF 1821b 5T ~ 5E,, z S L T y °�° 11 J x SC 7WR➢ ST J SJ m J\fig iexo �y E 847H 130SH AY SE SF 1 384EN s I83 ` ~ m� N m SL i84TH Pt f—� IT w 4 R� sr sr rpA H „. -sTT SE 186TH ST sE sf las H 104TH c 'SE n S7 _ ZH p a SE IHfi"rH Sr a tism sF r a[<h sr ,` ^Mt.0 SE 187TH ST[ 188TH 3T SE v 1 �s7~ rB 5L FL� Y_ _t z 187TH SE I 5 SE 188T SE 188TH ST z u cY cr lmw € rh �y c a' F yE ieSTT+ 1 M =1 a I SE 168TH PL .7 A' P st 9o1H � SE ¢ SE 190TH ST H En A PIS r m ^ 4�gt5i r'vwi GTH ST a . 19Esl �.. ■ SE I32ND ST TL3fY 11600 W 12 PARK & SE 193REI 57 y d 14200 w- - - — w o RIpE .- �11� ]93sm IT T� _. ..- __- w 4 .y P IST �1'xx 1 SE 95TH ST ��6s 195THSE � '" C E 14fiTH Y PC-P 196TH y J PL SLSE 19TTlf 197TH PL^ SF ]5 r-f 3E I4Ti}{ C7SE 19Hr11 ST \1�}_. a 19H1HPL3F 1981H Sf PI PLSC ]9 TH+ ST El SE TH /% s%+�'e I 5i .,ST 2C 5? E 2015r Q� � �a l t st a sT T � t� SE 2015T 57 L� , s �� _02HD x SE 202N�D—PSI, SL 2 --� r SE 203RD r 9p]PL = IT �, �' 4 jj w ST N w m 204TH PL Y y 12 _ II sr zncTk z�TN�t SST M N M SE 204TH PL 57N '+QyN �4 SE 2D6TN }q S< Sr --use MM PL IF 206TH P. w ^ 951 1� KENTRIDGE ' ST 3 m ,M M PL SE 2 TH ST SE 2aerH sr fi00 _ 09TH yY 12/f10 33700 J tw,! 14DOO maSf 2091N SE 2 OTH� zrlwr w"` r `" Wi ZIOrN Cr L in 210TH "' Po SE 21 TH SE i) TM 21I Sli ` ST LLJ 'FS ,IT.PL "-'a a 71rTM SE 211TIjD 212TH SJ: 217Yr{ Pt z _ v } Fr E 212TH C PL m w "1r.�a 2121H 5T "� ST - SSE _212TH w c JaSd' PL ¢ SE SE YiN 7 F' a �213TH ST sr W q � SEti d SE 214TH PL % f a SE 2 -0TH 5T J Pf R E SE 31 Sr N J 'i� q4 SE 25TIdTH Y7 `SE rud a " 216TH _ ST d ire SE 216 T SE 217TH ST�.` �s `� SC 2J6TH PL ?)lwf.'1.:xl�LSE,:': SC TIrrN" a 2Il�H PI r; N 5< Z1rTN- 2vn cr pL ` �+ �� Pt ^- P, pp �,.217i Q W"a F v"'i } NSE 218TH --219TH PL w 2M `+Rzx ti4 J fi S=L 218TH "-A' Ft ¢ Q ST rrll� e H SE 220TH Sl m north `r zYviP s q L 219i}I Pt C r" ` '-SC 22DTH ST 227ST Shy=� a ^ PL -� rYrao K � //�� w w Ar SL s� 221 SE 222HD ST SE �22FH0 ryr a O 'S7 �'N pp x w � a PL SEJM� 12dtH ( j Se LJ 2 w R ` -.... iSTNwSE 224 H ST 1340a 5E 224TH � la _ST YIC I[�I iY MA,P NCRTH EXHIBIT B Downstream Drainage Map u 1 x Eye r ■ • + . • •mpg• ■ • ■ Itof •■ ■ ■ ■ • ■ ■ • y F • ■ ■ ■ # ol r • �� • y 3 • WL do • R i ■ ■ • aa� ■ ■ • ■ • 3A v N, a ■ a ■ a }iii�il' 1 1 EXHIBIT C Upstream Basin Map I * i � Y ir X A r 3JLVH O • • r ■ • R ~f ocr) � • IP I / • ■ ■ • R • ■ 1 • ■ �1 Q ry • N • ■ `! • • 11 ,f,� r w ■ r. • AD • r. • • ■ • C • 4 rf • D s i � ■ 50 — — — — r I , I • i f f v ` I f rr ■ r ■ x� r i ■ w� _� • I Big • fi! • I #� M all • ■ • • • ■ ■ • ■ r ' H 41C R r • • I ■ • • ■ • 4 . ■ • • ■ • " a til�� 6 r r r r■ 30 �� • • ■ c N • • ■ ■ 0 ■ I ■ ■ J • ■ ■ • r; � 0 • • Jlj ■ ■ • • 4 • ■ Job • r * • •.■ JLM • 1■■nr ■ • r ■ • �- � 1f r • • r • — L O i ■ • INS I 1 ; IN ■ TASK 2 RESOURCE REVIEW 1 1 hi 11 1 TASK 2 RESOURCE REVIEW 1 • Adopted Basin Plans: The site is part of the Soos Creek Basin. • Finalized Drainage Studies: This is not applicable. • Basin Reconnaissance Summary Report: Once again, the site is located in the Soos Creek Basin. Part of the Soos Creek Basin Reconnaissance Summary Report is to construct a control weir at the bridge on S.E. Lake Young's Way. This project should be justified by a future basin plan. It is not known at this time if that weir is constructed; however, this weir is approximately 1 mile downstream from the proposed project site. • CriticaI Drainage Area Maps: According to the Water Quality applications map and the 1998 King County, Washington Surface Water Design Manual (KCSWDM), Basic Water Quality treatment is required. According to the flow control applications map, also in the KCSWDM, Level 2 Flow Control is required as a minimum. • F000dplain and Floodway FEMA Maps: Please see the enclosed Exhibit D — FEMA Map utilized for this analysis (Panel No. 991 of 1,725, Map No. 53033CO991 F, revised May 16, 1995). As indicated by this map, the proposed project site does not lie within a floodplain or floodway of a stream; however, Soos Creek lies 270 feet east of the project site and does have a floodplain associated with it. However, it does not encroach on the project site. • Other Off -Site Analysis Reports: A review of Exhibit I — Basin Reconnaissance Summary Report and a site investigation were conducted in preparation of this Level 1 Drainage Analysis. The United States Department of Agriculture Soils Conservation Service Map is also provided. See Exhibit F -- SCS Soils Map. • Sensitive Areas Folios: Based on our review of the King County Sensitive Areas Map Folios, it was found the subject site does lie within a sensitive area, which is an erosion sensitive area. Also, a wetland is located immediately east of the project site, in addition to Soos Creek that is also a sensitive salmon -bearing stream. • Road Drainage Problems: This is not applicable. • United States Department of Agriculture King County Soils Survey: Based on the soils map for this area, the entire site is located within Alderwood type soils. • Wetland Inventory Maps: The Exhibit H — Wetland Inventory Map for this area is included herewith. Soos Creek is coursing through wetland along almost its entire downstream drainage course. However, immediately adjacent to the site, there is no mapped wetland as indicated by Exhibit H — Wetland Inventory Map, even though there are wetlands existing there. • Migrating River Studies: This is not applicable. 1 11418.008.doe [1P3/tep] EXHIBIT D FEMA Map ME OC CL. a GC LL. 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'.: k.c sUU I HtAs, r m= m m= = = m m m m r m m= m r r 1 n EXHIBIT E Sensitive Areas Folios �71 u fl 11 LANSSLOF HAZARD AREAS A& NORTH I� SO$i 1f) KIN, COUNTY SLNSIFiVF A..RFA FOLIO I I I I I I I I I I I I I I I I 1 t4AC, R'l- H 1 fl u EROSION HAZARD AREAS 4 Ka0,x S 3Q Kir G SENsirivL AREAS f=puo A& NORTH � J l_, _ 2i �- @ ,. r 1 I WETLANDS A& HaiINC N C) n T H SD$1 �0 KING C oliN l Y SLNSI I IVL APLAS FOLIO 1 EXHIBIT F SCS Soils Map 1 1 1 1 1 1 1 1 1 1 � J -� a •.:' �' -� � � i • .` ' F , A B,:7 r ` xc>5.p ?. s Sk41 S '-} Am6 if Tw a a,,. ^ � ,J, W x +r�` Pq, �� ii� +q � •� 4 `�7Cr A., :q4 -- • a _y ,. ��ulf� a �� 4 R ire mB 7 `,lJJi IL x e n 0. Ag8 N " ar B9�1 ABC � � •, A AgC, �k AeCUr Am6. Ag8 9� `=U` Na EvAgC AmB AgC AgC '_--_�� A9C .. � Am8 \ r �, A ��+•• EvC c Na AgC i 70 y `" " •EvB EVB No AgC AkF AmC'I Ur \ •I _ Sk No • Ag8 �A61C n m O y qv AgB •\ No Agg L� AgC AroG �EvC N Sk a:; - �14 o AgC LL-- No i L N w • AgC' W ` + t NQ '+ No AGO SOILS MAP A& NOR 1 I-1 1 EXHIBIT G Assessor's Map 1 R,r-an SEB6TH VL s-r I owuw wwww IXe 1fO' s197sa L10041- 619780-0261 .5 : 0260 AOM2 197 , i61978 _ �51978 .197 ;6197 I R+, M, - `- 0280=_0286=°0285--0284= moot -0V692- aom2- i 619960 0100 a =A 619789-0300 00001- -0wos 619960 619960 0160 9 j nn 0140 -00001- 780 6147�883Z1 t 301 619784 -0D001- 0318 = e1a s j nmm' [,w I,f vl ,� j Gn sn 913 519780 619780 197&0 19780 i I19'3p 0120 a,� s 0340 = 0320 !j °0323 s03241 ea,xn moans •en I wm m+n min 0,-» [,m i now 1m298Qom41. `0203a02 .m19u.8m.4 = _G1 2e = = sro.nm,,n a -,n . m&u 0218a n.+.R-=a6 ,19 i -204 619-08R.Oam4af1ea00a,1.aw0s-z',20,, 980(R-00002246 W90, 619840-0222 41 6t980-020D 618959 0az- 61891499I0n0o-6 fll 619900 j ,sma„ 00596109m40 _ 6 619B4"245 7"0241 619900-0040 2- W2- S 619-0244 8,94G-042 s 050 � 619840-0260 619900-0041 i - elsvannlm 619840-0280rt� 619900 ,a 619900 -00aaz- i °919900-0125 2 0126 = 0127 619960 0180 -00001- 819900 0099 619900 0100 619900 0080 L�l 332305-9039 (0.94 A.) A 332305 9073 (4.03 AC) n>•an � n+v.s,i nn+n nssen I,s+.a„ I � m . 619840-0300 4ibt x 619900 g 6199M Ix 619900 , 619900 �1E.9(0 1 ' L0002- ' ?I - 0141 0142 0186 '- � 0210 = f �• � ' of ; 0� 4ri i <,xat ! � 619900 619840-0320 a 619900 : j619900 414 9 519900 p2D6 ! a i -0ooa2 e _ s 1 ! I i 0140 = 0185 81G9�u-OioO 619900 s 0184 � � I " I►f .1 T4. 9840 K 619840 9900 or, 6 19c;) +� �y I r ; aJ41 a aa74a I n, W, n.e:„ _ p t4 04002- 444oz- ' 60 E 619M _A02154; ' 619900 _ - ❑180 0182 i - f I 1 I fRAO, ASSFSSOR'S MAP i !FORTH 1 � EXHIBIT H Wetland Inventory Map r 1 1 1 1 1 1 1 1 1 1 I Mica TN U % t 1 i C Lower Cedar River W. Crete - - 5 78 6 17 15 75 Cl 23..�-� 81 20 62 Jealdas Creek Black River 25 24 7 � 3g 28 2 i61 84 3U 33 SOOS 29 Creek 39 8 99 , i 55 56 Lower Green River I Covington Creek Lei 58 67 86 Middle Green River . Soos Creek Green River Basin 1 EXHIBIT I Basin Reconnaissance Summary Report 7- L 7 L 71 1-1 1 11 V 7- L RECONNAISSANCE REPORT NO, 2 1 SOOS CREEK BASIN 1 IJANUARY 1986 11 Natural Resources and Parks Division and Surface Water Management Division King County, Washington 11 1 King County Executive Tim Hill King County Council Audrey Gruger, District 1 Cynthia Sullivan, District 2 Bill Reams, District 3 Lois North_. District 4 Ron Sims. District 5 Bruce Laing, District 6 Paul Barden, District 7 Bob Grieve, District 8 Gary Grant, District 9 )Department of Public Works Don LaBelle, Director Surface Water Management Division Joseph J. Simmler. Division Manager Jim Kramer, Assistant Division Manager Dave Clark, Manager, River S Water Resource Section Larry Gibbons, Manager. Project Management and Design Section Contributing Staff Doug Chin, Sr. Engineer Randall Parsons, Sr_ Engineer Andy Levesque, Sr. Engineer Bruce Barker, En ineer Arnv Stonkus, Engineer Rav Steiger. Engineer Pete Ringen, Engineer Cot3sul6ng Staff Don Spencer_ associate Geologist. Earth ' Consultants. Inc. John Bethel. Soil Scientist. Earth Consultants. Inc. Parks,Planning and Resources Joe Nagel, Director Natural Resources and Parks Division Russ Cahill, Division Manager Bill Jolly, Acting Division Manager Derek Poon, Chief. Resources Planning Section Bill Eckel, Manager, Basin Planning Program Contributing Staff Ray Heller, Project Manager & Team Leader Matthew Clark, Project Manager Robert R. Fuerstenberg, Biolo,-ist & Team Leader Matthew J. Bruengo. Geologist Lee Benda, Geologist Derek Booth, Geologist Dyanne Sheldon, Wetlands Biologist Cindv Baker. Earth Scientist Di Johnson, Planning Support Technician Robert Radek. Planning Support Technician Randal Bav:s, Planning Support Technician Fred Bentler, Planning Support Technician Mark Hudson, Planning Support Technician Sharon Clausen, Planning Support Technician David Truax. Planning Support Technician Brian Vanderbur{g. Planning Support Technician Carolvn M. Byerly, Technical Writer Susanna Hornig, Technical Writer Virginia Newman. Graphic Artist Marcia McNulty. Typesetter Mildred Miller, Tvpesetter Jaki Reed. Typesetter Lela Lira. Office Technician Marty Cos. Office Technician P:CR TABLE OF CONTENTS I. SUMMARY 1 II. INTRODUCTION III. FINDINGS IN SODS CREEK BASIN ? A. Overview B. Effects of Urbanization C. Specific Problems 4 L Bank failures 4 2. Channel erosion 4 3_ Flooding and potential flooding 4 4. Stream habitat 4 IV. RECOMMENDATIONS 5 A. Inform appropriate governmental agencies of 5 the reconnaissance findinzs B. Reevaluate specific surface water management 5 policies C. Prepare a comprehensive basin plan 6 D. Construct the capital improvement projects 6 E. Maintain or enhance instream and riparian habitats 6 V. MAP 7 APPENDICES: APPENDIX A: Estimated Costs A_i APPENDIX B: Capital Improvement Project Rankin; I3_I APPENDIX C: Detailed Findings and Recommendations C_1 L� L SUM M"Y The Soos Creek Basin is Iocated north and east of the Green River in King County. While the southern and eastern portions of the basin are rural, the remainder is a rapidly expanding suburban community. This development pattern has not caused serious environmental damage or flooding, however, due to highly pervious soils, an extensive network of streams and wetlands that provide natural storage for stormwater runoff, and the fact that development has only recently accelerated in this basin. Although the overall severity of problems in the Soos Creek Basin was not great at the time of reconnaissance, several significant problems were identified and should be addressed. These include bank failures, channel erosion, flooding in some locations, and poor stream habitat, ' Recommendations to address these problems include efforts to 1) inform appropriate agencies of the reconnaissance findings, 2) reevaluate specific policy issues regarding the management of surface water, 3) prepare a comprehensive basin plan, 4) construct the capital improvement projects evaluated with citizen advisory committee criteria, and 5) maintain or enhance habitat throughout the basin. II. INI'RODUCiTON. History and Goals of the Program In 1985 the King County Council approved funding f g pp a or the Planning Division (now called the Natural Resources and Parks Division), in coordination with the Surface Water Management Division. to conduct a reconnaissance of 29 major drainage basins located in King County. The effort began with an initial investigation of three basins --Evans. Soos. and Hylebos Creeks -- in order to determine existing and potential surface water problems ' and to recommend action to mitigate and prevent these problems. These initial investigations used available data and new field observations to examine geology, hydrology, and habitat conditions in each basin. Findings from these three basins led the King County Council to adopt Resolution 60.18 in April 1986, calling for reconnaissance to be completed on the remaining 26 basins. The 1 Basin Reconnaissance Program, which was subsequently established, is now an important element of surface water management. The goals of the program are to provide useful data with regard to 1) critical problems needing immediate solutions. 2) basin characteristics for use in the preparation of detailed basin management plans, and 2) capital costs associated with the early resolution of drainage problems. The reconnaissance reports are intended to provide an evaluation of present drainage conditions in the County in order to transmit information to policymakers to aid them in developing more detailed regulatory measures and specific capital improvement plans. They are not intended to ascribe in any conclusive manner the causes of drainage or erosion problems. instead, then are to be used as initial surveys from which choices for subsequent detailed engineering and other professional environmental analyses may be made. Due to the limited amount of time available for the field work in each basin, the reports must be viewed as descriptive environmental narratives rather than as final engineering conclusions. ' Recommendations contained in each report provide a description of potential miticyative measures for each particular basin: these measures might provide maximum environmental protection through capital project construction or development approval conditions. The appropriate extent of such measures will be decided on a case-bv-case basis by County officials responsible for reviewing applications for permit approvals and for choosing among competing projects for public construction. Nothing in the reports is intended to substitute I P:SCB Soos Creek Basin (continued) i ' for a more thorough environmental and engineering analysis possible on a site -specific basis for any proposal. ' III, FINDINGS IN SODS CREEK BASIN Reconnaissance in the Soos Creek Basin was conducted in November 1985 by Ray Heller, resource planner-, Randall Parsons, engineer, and Don Spencer and John Bethel, consulting soil scientists. Their findings and recommendations are presented as follows. A_ Overview of Soos Cheek Basin Geographic and land use features The Soos Creek Basin is located north and east of the Green River in the eastern portion of the Soos Creek Plateau Community Planning Area. The basin is situated east of the city of Kent, northeast of Auburn, and southeast of Renton. The city of Seattle's Lake Youngs watershed is included in the Soos Creek Basin. The south and east portions of the basin are rural in character, with the north and west portions committed to a suburban development pattern that includes subdivisions and scattered single-family homes. The 1985 King County Comprehensive Plan shows areas east of Bic, Soos Creek (in the northern part of the basin) and south of Lake Youngs with "rural development" designations that specify 1-5 dwelling units (DU) per acre. The southern area to the east of Soos Creek and north of the Green River is designated "transitional." This interim designation will limit development to rural - residential densities until such time as rural/urban designations are made through updated community plans_ The King County Parks Department owns more than a five -mile stretch from Southeast 192nd Street to Lake Meridian, along Big Soos Creek. These presently undeveloped park lands are mostly wetlands and lie within the 100-year floodplain. ' Major geologic, hydraulic, and hydrologic features. The Soos Creek drainage area is a tributary basin to the Green River basin. The area is part of the Puget Sound lowlands and is characterized by a glacial drift plain. covered by small ridges and ' rounded hills that were formed by continental' glaciation. While the Soos Creek Basin is moderately developed, the degree and amount of channel erosion. slope failures, and other forms of geologic and hydraulic dama(•e are far less than might be expected. Artificial conveyances are also still functioning to this basin as they were originally designed and intended. These conditions may be explained by three main factors. First, there is a very effective natural retention and detention (RID) system provided by an extensive network of 52 wetlands and numerous major and minor streams. Most of the wetlands are located in the northern portion of the basin in the upland areas as well as adjacent to streams. Big Soos Creek originates in the northeast corner of the plateau and flows southeast to the junction of Little Soos and Jenkins Creeks, then curves west at its confluence with Covington Creek. Big Soos Creek joins the Green River east of Auburn near State Road (SR) 18 at 160th Avenue SE. These wetlands and streams appear to be functioning well as stormwater control facilities for the current levels o€ ' development. as well as serving to prevent damage from surface water runoff. ' P:SCB 2 Soos Creek Basin (continued) ' Second, the soils in the upland areas generally have a high infiltrative capacity, Particularly in the southern portion of the basin. Stormwater is absorbed into the ground at these locations before it can cause erosion or other damage. Third, development in the basin has only just begun. Properly Functioning wetlands and streams have not yet been altered, nor have well -draining soils been covered by impervious surfaces to any great extent. Maintaining these properly functioning drainage systems should be a goal in this basin and will be the focus of recommendations made later in the report. Habitat characteristics. The habitat of Soos Creek Basin is generally good and supports large populations of both native and hatchery anadromous fish. The source of the hatchery fish is a State facility near the mouth of Soos Creek. Cutthroat trout reside in stream waters, and anadromous fish spawn and travel in many of the tributaries and the main stern of Big Soos, according to field observations and reports from local residents at the time of reconnaissance. Habitat is being damaged or threatened in some places by bank erosion and degraded water quality associated with land clearing, livestock feces, and wetland filling for development. One of the more serious instances of habitat -threatening erosion originates at the parking lot of the Seattle International Racewav (SIR), which is located on the plateau in the lower portion of the basin. Drainage from the paved parking lot is increasing erosion in nearby tributaries and filling spawning gravels with sediment. Appendix C of this report identifies sites of habitat damage or potential damage. Further water quality information related to habitat in the basin can be found in the Critical Stream r Inventory of Soos Creek, published by Metro_ B- Effec#s of Urbanization Low levels of development in most parts of the Soos Creek Basin, together with a well -functioning natural drainage system. have kept serious erosion, sedimentation, and habitat damage to a minimum until now. However, the present and projected rates of development indicate that there could be increasing amounts of damage, as suggested by the types of problems observed during reconnaissance. The expansion of impervious surfaces in the basin is alreadv beginning to accelerate the rates and volumes of stormwater flowing into (and reducing the capacities of) both natural and artificial channels. Impervious surfaces are also reducing the amount of highly pervious soils available to absorb runoff. The impacts predictable are already in evidence: erosion, mass -wasting, sedimentation, and degraded water quality and other habitat destruction. The following section provides a more detailed account of problems found during field investigation. C- Spec Problems Identified The study team examined numerous sites along the main stem of Bib Soos. Little Soos, and West Soos Creeks, as well as 1-1 small drainages tributary to these main stems. Several of the most significant problems found during reconnaissance are described below. P:SCB J Soos Creek Basin (continued) 1. Bank failures. On Tributary 0072A, river mile .30, for example, there exists a major bank failure triggered by bank undercutting. The source of the problem appears to be increased runoff from street construction. Unless flows are ' intercepted and redirected to storm sewers or other facilities, there will be increased bank erosion and consequential deterioration of property and stream habitat. 2 Channel Erosion. This includes both instream and bank erosion caused by large volumes of runoff emerging from storm drains and washing away highly erodible soils. This creates a new, deeply incised channel that enlarges over time. One example of this problem occurs on Tributary 0072 near the SIR in the lower part of the basin. Large expanses of pavement at this location have contributed to high volume flows and channel erosion. 3. Flooding and potential flooding. In numerous locations, development has increased the amount of runoff entering existing drainage facilities or otherwise impeded the ability of natural systems to carry the amount of runoff. When drainage systems fail to function as they were intended, flooding can occur. Increased development without concurrent increases in drainage facilities adds to the possibility that serious flooding will occur. On Tributary 0092, river mile 1.20, for example (collection point 11), the Little Soos has been contained and ' manicured as it passes through a developed plat. Such alteration to a natural drainage channel reduces the stream's capacity in places. The result has been the regular semi-annual flooding of some homes. Further development could aggravate these kinds of flooding problems. 4. Poor stream habitat due to: a. Lack of overhead canopy and streamside vegetation. Overhead canopy stabilizes water temperature, while streamside vegetation protects banks from erosion. b. Contamination by livestock fece& In areas of the basin where livestock have extensive access to streams. water quality has become degraded by animal feces. These cause harmful nutrients to be added to the water which can threaten fish survival rn Erosion. Streambank and channel erosion, alreadv described above. is caused in part by livestock access. On Tributary 0073, river miles 3.60-4.70, for example, there exists poor stream habitat because livestock have trampled and denuded banks of vegetation; this has led to the sedimentation of spawning areas and caused turbidity. IV_ RECOMMENDATIONS FOR ACTION The following recommendations are based on findings of the field team and reflect the original goals of the Basin Reconnaissance Program, as outlined in the introduction of this report. A_ Inform appropriate governmental agencies of the detailed findings from the ' reconnaissance of this basin_ Project representatives should meet with staff from King IP:SCB 4 I Soos Creek Basin (continued) County Roads Division, Surface Water Management Division, Building and Land Development, and other interested agencies to transmit relevant information. B. Reevaluate Vx'fic policy issues regarding surface water management. These may include the need to: L Improve enforcement of wetlands regulations to maintain these areas in their natural states. This will insure their continued function as surface water quality and quantity controllers, as well as preserve their habitat value. If regulation proves ineffective, the County should secure easements or consider other means to preserve wetland areas. 2 Require the establishment of undisturbed buffers and setbacks adjacent to natural ' drainage swales. Variations in stream morphology and geology indicate the need for stream corridor guidelines that take these into consideration. Improve enforcement of "no clearing" covenants in these sensitive areas or seek Countv easements or actual ownership. Fencing along streams in livestock areas would help water quality and reduce erosion and sedimentation. 3. Investigate and promote the infiltration of surface water where feasible and economical to reduce increased runoff from developed areas. Also, encourage the use of grass swales and open ditch conveyance systems to improve infiltration and water quality enhancement capacity. Areas of high filtration are identified on ' final display maps (for the Basin Reconnaissance Program) in the offices of Surface Water Management, Building and Land Development, and Basin Planning. ' 4. Require the tightlining of storm -drainage outfalls down steep or sensitive slopes using state -of-the art facilities, including high density polyethylene pipe With dissipation at the outfall. S_ Reevaluate stormwater rate and volume release regulations for new developments. Current regulations may be inadequate and result in unacceptable downstream erosion that causes property damage and loss of habitat. 6. Increase current maintenance levels for King County surface water RID and conveyance facilities. Due to the lack of funding, maintenance of existing facilities is sometimes insufficient and results in facility dysfunction and failure. These will only be agbravated by additional upstream development. rl L 1 P:SCB Soos Creek Basin (continued) C. Prepare a comprehensive basin plan to consider, at a minimum, the need to; 1. Enhance and utilize the extensive existing wetlands as regional storm -detention facilities without jeopardizing habitat values. Prepare a schedule for the anticipated need for these hydrologic enhancements as they relate to projected development in the basin and impact the wetland ecology. 2 Examine existing storm -detention and conveyance facilities to determine whether their control orifices are properly sized to optimize the detention site and achieve the maximum benefit to the downstream systems. ' 3. Establish floodplains in low-lying areas of slight gradient for existing and developed runoff conditions, i.e., adjacent to wetlands, particularly for wetlands ' proposed as regional detention sites where inundation of adjacent properties may be significant. 4_ Iden,ti,fy stream reaches critical to the maintenance of anadromous and trout populations. 5. Review geologic findings from this study in order to identify areas of particular soils' sensitivity and develop special analysis criteria for new developments. D. Construct ct the capital improvement projects according to the CEP priority selection criteria. These projects, identified in Appendix B of this report, include projects to: 1 Calibrate and retrofit existing detention -control structures and to improve existing conveyance systems. 2 Stabilize channels and slopes 3. Provide regional detention facilities, including the utilization of wetlands. where biological assessment has determined that the natural habitat values will not be significantly altered. E. Maintain or enhance the instream and riparian habitats. 1. Maintain wetlands and buffer areas around them. These provide both valuable ' wildlife habitat and natural stormwater storage that helps to maintain year-round baseflows in the stream. Z Adopt a stream -corridor policy in the Soos Creek Community Plan to protect the stream corridor from damaging types of land uses in adjacent areas. ' 3_ Encourage the Washington State Department of Fisheries to allow use of the natural stream system for salmon spawning. Maintain a natural run of all the indigenous anadromous species. ' 4. Prohibit filling in the 100-year floodplain. The County should establish re_-ulations to prevent the loss of floodplains in order to maintain their natural storage for floodwaters and guard against degradation of important fish and wildlife habitat. IP-SCB 6 •— � f E- 3 I '_ � - -. i� \ -fie se 4-1 I3 Ems,;° SODS CREEK BASIN ' i Y � \� SSE I rT} - ST -`� - i��,. � .fl •. \ __ g, I •�• Basin Boundary aF gym,`'' Collection Point Boundary si LCollection Paint T i I S7 SEI $T •+`�•. Stream } i Li Y I Sr - +••'a 'F % 0072 Tributary Number 'VE F *5401 Proposed Project (-r I. • 4 j Y`" • • { 1 Mi. n ' - -._ F ' _ - f�: Afep/G 43wG Y' I E I LaVr y 5418 e ~7 Q asc Y OF SEATTLE WATERS HE _ n v IT .E ;, s • 009 m s'6Z.' +ST 't' ° - •' Q7 s • 4.4 - 71 • as �.. . •• •. 5412 s Q \ .. - - : - .. F•iig Sa[rs ` \ [...r • • - - - r. rwm. sr µd • •• • • ♦ • r .,• SE x.. s• �� �a 540S • p'��a RE r p �Pri�fail • � � ••• •ter sc ••'7F � •�'`� �aJ '(i5.5417 v. • Ri i • •- w � T C 0 5402 Q v ii- . 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Q _ v r j V1 .� i Q C= � Q t4 3 to o -• .� 3 � -- � � C J = _� '� it -- � V' � � � ..� ✓' p 1 J , � C o r a 40 Ll f Q Y o C I C p ' n VJ O = J �• "✓ v 71 Lj m a - _CLi 7 V7 — f 2 c � r ° c ZR u 1 �_ o o o ta C� sir eq wry a _ g� c ay sA f —V U O Y y r O c Q r _O vs a ° r d U E V C_ }� yIn to o Z 3 _ � .O f j O .0 3 CO O_ � O O � •' O X C � CZ O j - tj r — rD u C p -D 3 3 _w C4 Cr C ^� C . f C- 1 r r_ o Ei J }� O �r C O C f y ✓ C rr V• V. kr�3 1`1 P Q r- § § g 8 `.0 Vs M OD r.A 6T 109- 69 v W r C W _ 0. r r e p � r v � Q 3 y W 0 .t Si f ,SC J G -� —7. -1i j •� J J' J c X 'r �r C Il 1 1 1 APPENDIX B CAPITAL IMPROVEMENT PROJECT RANKING SOOS CREEK BASIN Prior to the Soos Creek watershed field reconnaissance, 13 projects had been identified and rated using the CIP selection criteria developed by the Surface Water Management (SWM) Division and the Natural Resources and Parks Division. Following the reconnaissance, 20 projects remain proposed for this area. They include the 7 new, previously unidentified and unrated projects plus the initial 13 projects. The previous SWM capital improvements project list for the Soos Creek Basin had an estimated cost of S3,450,000, while the revised list decreases to an estimated cost of S2,621000. This 24% reduction in estimated capital costs is due mainly to downward revised cost figures for acquiring or securing easements over wetlands. The following table summarizes the scores and costs for the CIPs proposed for the Hylebos Creek Basin. The projects were rated according to previously established SWM Program Citizen Advisory Committee criteria. The projects ranked below are those for which the first rating question, ELEMENT 1: "GO/NO-GO," could be answered affirmatively. The projects can now be considered for merging into the "live" CIP list. Any project scoring over 100 points should be considered for incorporation into the six -year CIP plans. RANK PROJECT NO. SCORE COST 1 5415 135 S 156,000 2 5417 127 223,000 3 5407' 113 22&000 4 5414 105 169,000 5 5409* 100 221,000 6 5416 93 68,400 7 5402" 95 194.000 S 5401 59 153.000 9 5406 " 33 17.300 TOTAL S 1.430.000 Indicates project was identified by SWM prior to the reconnaisance 1 1 r,9 Q i..i Vl S Cb Q Cd O?`" I � c J o to Q c z ¢� g c 0 O > c p � c O ., c a> Q c� O cc e4.= c .� U p O r ice., � v� £ d �:. � •W c f11 _0 _ � 'w • � c � v, ti„ a � v, c v 0 a� ` c ,- c v O Q N q m sU. � = 01 � •__ = fJ U O C. tb V C eq C ro= it o m C N �_ y '.�., o .a -� 2 •'3 F o 'V1 fj c c� ew. �j 3 [0 C] cI 0 v 4 U L Ca �, a ss a w 3 y r 0 c' U CJ o Q GoC = o to ♦/ � � r � .Ci r pw � � Z V? m 73 3 E cm O ( c -M ' _ - O am_ J � •r- O w� to O � ? 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O ❑ o � o a� v Ol 4t y d s, r Z 9,zZ� o Z 02 1 d i .� U � r O C C C O Z-, d E _ C. 1 C vi 'Z J O C d E = r. r- 77 a CZ eb � j � C X _ .3 � •y c c � _C � � o c In 7:jzz r. LI) tfj tj f v ? "..5 ✓J a V3 J n .r fZ `J u J� f rl ^'t ZZ, o v 3 c C.L. •C7' u � ea t, � 73 G C3 O= E O LO c to O y� ° 72 c L O 4 V Q sn iV to tn Vi to C to = ' V � J 3 to t r � c c � c tb cn i cA to to G :j -j �r. c — :i] 7 j r -c - -_77- 'J t= V' v C C.% n`_ TASK 3 FIELD INSPECTION 1 1 EXHIBIT J Off -Site Analysis Drainage System Table o � O O ^C z p r4 x � 3 A C b n. .O C/] � C > A' O z O z O z z W �y a �"a=gzzz o a o Q z U A W •� � �..? a .S � o zzz a o 0 z o z z zkn z w cry e VI) q r o V w A ev 1•+4 ,� U --� -� gz N O O O gz r�r�jj o v o n, •W •aro, W C ' v > -a 8 W u as C CZ6 > t3 En ti ° v CA o y a`di 3 � c bA �. 3 �j- O M v-ul U v� t7 A -i n V (E) O �1 r ITASK 3 FIELD INSPECTION ' There were no major problems reported or observed during the resource review other than the project site lying within the sensitive area known as an erosion sensitive area. Based on the review of the drainage complaints in the downstream drainage course, there were no existing constrictions or lack of capacity in the existing drainage system nor did the field reconnaissance find any potential constrictions or lack of ' capacity in the existing drainage system downstream from the site. 3.1 Conveyance System Nuisance Problems (Type 1) 1 Conveyance system nuisance problems, in general, are defined as any existing or predicted flooding or erosion that does not constitute a severe flooding or erosion problem. Conveyance ' system nuisance problems are defined as flooding or erosion that results in the overflow of the constructed conveyance system for runoff events less than or equal to a 10-year event. Examples include inundation of a shoulder or lane of a roadway. Overflows collecting in yards or pastures, ' shallow flows across driveways, minor flooding in crawlspaces or unheated garages/outbuildings and minor erosion. ' Based on a review of the drainage complaints provided by King County, there is no evidence of past conveyance system nuisance problems occurring nor is there any evidence of any occurring during our site visit. One drainage complaint dealt with a plugged pipe immediately on the southeast corner of the project site, not on the project site. The project site does not drain to this pipe, which was plugged at one time but was cleaned out and the drainage passing through the pipe was allowed to pass through unobstructed. 3.2 Severe Erosion Problems (Type 2) Severe erosion problems are defined as downstream channels, ravines, or slopes with evidence of or potential for erosion/incision, sufficient to pose a sedimentation hazard to downstream conveyance systems or propose a landslide hazard by undercutting adjacent slopes. Severe erosion problems do not include roadway or minor ditch erosion. Based on our site visit and the King County drainage complaints, there is no evidence of, or potential for erosion/incision sufficient to pose a sedimentation hazard to the downstream conveyance system evident anywhere along the downstream drainage course. However, this project site is known to exist in a sensitive area for erosion problems and, during construction when the site is unstable, there will have to be some measures instituted to prevent erosion from occurring on the project site so that the wetlands and Soos Creek are not impacted by sedimentation during construction. 3.3 Severe Flooding Problems (Type 3) Severe flooding problems can be caused by conveyance system overflows or the elevated water surfaces of ponds, lakes, wetlands, or closed depressions. Severe flooding problems are defined as follows: • Flooding of the finished area of a habitable building for runoff events less than or equal to the 100-year event. Examples include flooding of finished floors of homes and commercial or industrial buildings. Flooding in electricaVheating systems and components in the crawlspace or garage of a home. Such problems are referred to as "severe building flooding problems." 11418.008.doc [rP]/tep] • Flooding over all lanes of a roadway or severely impacting a sole access driveway for runoff events less than or equal to the 100-year event. Such problems are referred to as "severe roadway flooding problems." As mentioned previously, there is no evidence of flooding from the drainage complaints or from our site visit downstream of the subject property. The entire downstream drainage course courses through mostly undeveloped land that consists of trees, brush, wetland, and a meandering stream with a couple of street crossings, including S.E. 192nd Street and S.E. Lake Young's Way approximately 1 mile downstream from the subject site. Most of the downstream drainage course occurs underneath the BPA transmission line easement. The portions of the downstream drainage course investigated by this site visit and a review of the soils map indicates that the downstream drainage course occurs through Alderwood, Norma, Everett, and Seattle muck type soils. The field reconnaissance for this off -site analysis drainage report was conducted on November 29, 2004. The skies were partially overcast and the high temperature was less than 40 degrees. 11418.008.doc [3PJ/tep] TASK 4 DRAINAGE SYSTEM DESCRIPTION ' AND PROBLEM DESCRIPTIONS 1 1 n n ' TASK 4 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS ' Runoff leaves the site by sheetflowing off the eastern property line of the site through thick vegetation and a wetland area for approximately 300 feet until entering Soos Creek, which is a meandering stream lying east of the project site. Runoff then courses southerly through Soos Creek until it crosses underneath S.E. 192nd Street though 36-inch CMP culvert at a fairly flat grade. Runoff then courses in a ' meandering stream known as Soos Creek over 1 mile from the site until it crosses underneath S.E. Lake Young's Way. This entire downstream drainage course occurs through wetland, tall brush, and treed areas. ' Review of the Exhibit K — Drainage Complaints show that there are no complaints concerning low conveyance capacity, flooding, or erosion in the downstream drainage course within I mile of the site. ' We investigated the complaints that we believe to be near the downstream drainage course based on the complaint list. After review of each complaint, only one is actually near the downstream drainage course. Complaint No. 96-1550 This complaint concerns a plugged culvert that caused flow to ' overtop a gravel driveway immediately adjacent to S.E. 192nd Street, which this project site will not drain through after development. This complaint has no impact on the analysis to ' determine flow control requirements for this project 11418.008.dx EJPJ/Wpl 1 EXHIBIT K Drainage Complaints 1 HOV . 22.2YJU4 11 : 05AN KC WLRD 1 I King County Water and Land Resources (%'LR) Division 201 S Jackson St, Suite 600 Seattle, WA 98104-3855 Date: !� ! Fax:. 4t 7L Phone: FILE COPY Number of pages including cover sheet: From, Candi McKM, En Tech 11 WLR Nto ater Services Section Phone: 206-296:1900 Fax Number., 206-296-0192 IMPORTANT LEVEL, I ANALYSIS NOTE: We do not stand copies of certain complaint types that are not relevant such as BCW, PI, FIR, MH and WQA, and we do not send CL and LS types, See key below, Type S Y, S2 and S3 will not be faxed due to size constraints, ll'e- //$//J' The following is a list of complaint types received by the Water and Land Resources Division Drainage Scrvices Section. Complaint numbers beginning prior to 1990-XXXX have been aichived and are no longer in our possession, They can still be retrieved, if necessary, but will take additional time and may not be beneficial to your research due to their age, development which has occurred, eta If you are intt rested in reviewing the actual complaints, they can be pulled (time permitting) for your review. Copies can be obtained for $ .15 per pages, and $2.00 per page for plans. WEEK TatIongwotion jXpe of Problem C "Ow Action Requost Business' for Clean water DCA DDM ])avelopna nUCoasn„cdon Druinagc _ Ir laeeouy ' CCP "CL ltasponse to Ingu:rY Claim DM Drainage — &roaion/&dimentation . EH5tfamemeaa on Bold ISLE DTA Draivagc— %ndsiiddEarthMovement Dtaim p Technical Assistancc ER FC'CX<:KFCS EWomeawnt Review Facllitp Complaints NQ MMA Drainage—G fflw llnquiry F1 SWM Fee Inquiry MMF Maintenance - Aesthetics Maium nanoc - Flooding FIR n1l S VN NO Review S WM Fee an Mold MUG Maintenancc - General •LS Lawsuit - MOM Mainmaattce - Mowing ' RR f1w ity Engr g Rcvicw MNM MNW M IrW alum — Needs Maintenance MaiarraMoc.Nwtious Weeds MA Ncighborhood Dnalnage AsAmmm SWF sWM Fee Q¢oations WQC WQE water Quality campig3at Water WQB Watar QuIlty — Btot Naaagernmi Practices QfiW4 Euf0M=ent WQD V1talw Quality — Damping WQR Water Quality Eu&cariag Review WQI Water Quality — Illicit Connection WQA Wakr Quality Audit Water PO4 sWM Fee _ltammasar=ent Quality — odw GRT SWM i3ee-ant S t�,SId3 134&QO�$ lea NWD SWMFco-NewDlscount ' Subject to Public Diselgsur* raquimmem 1. Rooeipt oi'wri pm mgtuat for docl3 eats 2. Review and approval by Proseaudug Auamo)et office 1 NOV.22.2004 1110GAM KC WLRD N0.66 F.2/5 King CWY Water and laid Resnums MOM - embne servi9e11 Secum ' cf ~hint 908'@h P�nted : 11/19/2004 1:50:07 PM ' complaint Type dumber cm TYPO of Pre O ANUS et Pr m Comments Tpros Pspe 1975-0076 C FLOG RD WY/FLD'D/112TH AVE SEISE 186TH ST 686E2 ' 1977-0003 C DRNG 12207 SE 192ND ST 0 GOLDEN HILLS 1977-0072 C FLOG 12202 SE 192ND ST 686F3 11876-110111 C 1978-0081 C PONDING DRNG 19248 121 ST PL SE EAST OF BENSON HWY 686172 686F2 19248 121 ST PL SE 686F2 1979-0047 C 11403 SE 204TH ST SOIL BULLDOZED/PANTHER LK AREA 686E2 11981-0081 C 1981-0215 C DRNG DRNG 19917 19916 122ND PL 122ND SE 13LOCKEDIEAST HILL AREA 686F3 PL SE C/B CAVING IN 686F3 1982-0539 C FLDG 12600 SE 192ND ST EAST KENT AREA 686F2 11983-0424 X DRNG 12528 SE 202ND PL SYSTEM MAINTENANCE 686F3 1964-0298 C FILL 18504 112TH AVE SE ILLEGAL NEAR. 17409 126TH AVL SE 606E1 1984-0313 R FLDG 1325D 5E 192ND ST TO ROADS DIV.4 E86F2 984-0314 C FLDG 13250 SE 192ND ST SE 192ND ST/134TH AVE SE 686F2 984-0324 C DRNG SE 2G4TH ST/124TH AVE 686F3 1966-0702 C DRNG 12240 SE 200TH ST MAINTENANCE OF LOT 686F3 986-1166 C 1 FLDG 11202 SE 186TH ST STORM OVERFLOW 686E2 1986-1185 G FLDG 11202 SE 186TH ST SEE; 86-1166 BRYANT, BILL 686E2 9p- 4190 C FLDC3 11001 SE 186TH ST BASEMENT GI=TTING WATER 666EZ 9c. j246 C FLOG 20236 127TH PL SE WATER FROM NEIGHBORS 87-0916 686F3 1987-0934 C DRNG 11202 SE 188TH ST CULVERTS BLOCKED 66-1186,1165 686F2 1987-0471 C FLDG 11202 SE 186TH ST SPRING GLEN 80-1166,1185 686E2 987-0545 C DHNG 18627 109TH AVE SE INADEQUATE SYSTEM 686E2 1987-0675 C DITCH 19407 124TH AVE SE DRAINAGE DITCH ON PROPERTY 6661=3 -1049 C L987-0238 TO RD COORD 04/27/87_ 686F2 G FLDG 1843i 120TH AVE SE NEW DRIVEWAY WILL IT FLOOD G86F2 1988-0236 ER PIPE 18431 120TH AVE SE NEED EXTENSION OF 42" CULVERT 688F2 q966-0551 C DRNG 20002 124TH AVE SE FILL IN WETLANDS 586F3 989.0003 C DRNG 18612 120TH AVE SE INCREASED RUNOFF/CHANNEL 666F2 89-0019 G t89-0192 DFING 19400 124TH AVE SE DITCH MAINTENANCE 686FG C DRNG 16612 120TH AVE SE X PIPE NOT WORKING 6a6F2 198"410 C DRNG 12213 SE 199TH ST PONDING IN DRAINAGE EASEMENT 686F3 89-0650 C DRNG 18631 111TH PL SE S/W DRNG AND DAMAGE 686E2 89-0700 X DRNG 18631 111TH PL SE WATER ON SIDEWALK/89-0650 FRITON 666E2 1990-0075 C DRNG 14254 SE 186TH ST PLUGGED CULVERT/STORM 686E2 t90-0141 C FLDG 18400 112TH AVE SF POND OVERFLOW/90-0149,235,372/STQII 686E2 90-0149 C FLDG 11202 SE 186TH ST RID POND OVERFLOW/ROBERT/ STORM 686E2 190-0231 C DRNG 18425 112TH AVE SE WD POND OVERFLOW/STORM 90-274,37 686E2 Page 1 of 4 �J NOV.22.2004 11:06AM KC WLRD NO.6GO P.S/5 effo TCo Motor EMI Prlld1m Aflfts of PrWem Commeots ih('as Pepe 1 7235 C FLDG 11202 SE 1SETH ST WATER IN BASEMENT/STORM/90-141,148, 686E2 1990-0274 C 1990-0342 C FLDG 11022 SE 164TH PL K/D POND FLOOOFD/STORM 6$6Eh 2 FLDG 11202 SE 186TH ST RID POND/ROIBERT/ STORM EVENT 1990-0372 X DRNG 11202 SE 186TH ST 686E2 R/D PONDS OVERFLOW9/90-141.149,235,2 686E2 11990-0664 ER 1990-0709 MANHOLE 12400 SE 201 ST PL FAILURE-LINDA CREST PLAT DIV 1 & 2 686Fc, CL FLDG 16504 112TH AVE SE CL#12959 SEE CL#13224 DUE DECEMBE 686 E2 1990-0884 C DRNG 18427 112TH AVE SE RID POND DRAINAGE/STORM 11990-1061 CL FLDG 11202 SE 166TH ST CL#13224 SEE CL#12959 GARAGE FLOO 686E2 1990-1063 C DRNG 12025 SE 196TH ST SPRING HILL ONE/DITCH NOT DRAINING 666E2 686F3 11990-1186 CL 1990-1212 C FLDG DITCH 11044 11044 SE 186TH ST SE 186TH ST MEMOIRUDDELLS STUDY TO PA 686E2 RU/SIDE DITCH-FILU90-1186 686E2 1990-1212 E FILL/DIT 11044 SE 186TH ST WILL START WORK 09120 CHK ON 09/30/9 688E2 1990-1212 ER FILL DIT 11044 SE 186TH ST RUDELLS STUDY 686E2 1990-122G C DANG 18615 107TH AVE SE FLOODED BASEMENTIBAD ROADWAY 686E2 1990-1445 C DRNG 18427 112TH AVE SE RID POND OVERFLOWING TO STUDY/91-1 686E2 SR FLDG 18427 112TH AVE SE STORM EVENT 1990-1530 990-1531 SR FLDG 18427 112TH AVE SE STORM EVENT NOT NDAP 6$6E2 1991-0150 C DRNG 18624 112TH AVE SE 686E2 991-0150 SR DRNG 18624 112TH AVE SE NOT NDAP 686E2 991-0196 C FLDG 18425 112TH AVE SE 686E2 1991.0196 SR FLOG 18425 112TH AVE SF NOT NDAP 686F2 686E2 9, 25a C DRNG 11254 SE 186TH ST 991-0299 C FLDG 19835 121 ST AVE SE OVERFLOW OFF PIPES 686E2 686F3 991-0299 SR FLDG 19835 121 ST AVE SE REFER TO BALD 686F3 991-0426 C FLDG. 12100 SE 197TH ST WASHOUT OF ROAD/DEVELOPEMENT 686F8 1991-0438 S1 SPK TO FINISH S1 3/4 - S2 TO'92 CON 686E2 991-0667 CL DRNG 18427 112TH AVE SE SEE 91-0438 SEE RUDDELLS 991-0837 C DAMAGECB 19001 116TH AVE SF C/B BELOW GRADE 686E2 686E2 1991-1005 C DRAINAGE 12213 SE 199TH ST PONDING IN YASD/FFNCING 1991-1095 C FLDG 11200 SE 186TH ST RUDDELL POND OVERFLOW 686F3 686E2 9-91-1102 C DRAINAGE 19006 116TH AVE SE INFO TO PM&❑ 68GE2 91-1149 X FLDG R/D 11200 SE 184TH ST CCF# SWM-1031 R/D POND CAPICITY 686E2 94-0038 C PONDING 11430 SE 192ND ST FOSS GRADING/FILLING VIOLATION G86E2 1994-0144 C DRNG 17925 116TH AVE SE FOSS FILLING VIOLIACT PLAT MORNING G 686E1 95-0200 C DITCH ?S 18204 116TH AVE SE LACK OF CONVEYAYNCE ON PVT PROPE 686Ei 96-0245 C RUN OFF 19526 122ND PL Sr: SPRING HILL ELEMENTARY INFO RDS DIT 686F3 1996-0786 G FLDG 12232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 666F3 196-07136 NDA FLDG 12232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 686F3 96-0788 R FLDG 12-232 SE 200TH ST FLOODING DUE TO STORM AND SUBSTN 686FS 1996-0905 C 1 DRNG 19400 120TH AVE SE DRAINGE FLOW QUESTION DEVELOP INF 686E2 Page 2 of 4 NOV . 22. 2004 11: U7AP1 KC WLRD N0.660 P . 4; 1_, 1 Typo NOW11at Humhor code TYpo of PPOOM MOM of Pr Coolmn�#s ' T6ros Papa 1 1550 C DFING 19121 124TH AVE 5E PLUGGED D1W CULVERT IMPACT TO PVT 686F2 — 11996-1564 C DRNG 18908 113TH WAY SE PRIVATE PROPERTY IMPACT TO PVT DRN 686E2 1996-1635 C DRNG 20024 124TH AVEE SE ROAD IMPROVEMENT PROJECT IMPACT 686FS 1996-1906 E R/D POND 12813 BE 232ND PL FENCE ENCROACHMENP INTO TRACT 6S6F3 11996-2071 C FLOG 11826 SE 1BOTH ST INADEOUATE CONVEYANCE OFFSITE FLO 68BE1 1996-2071 R FLDG 11828 SE 180TH ST INADEQUATE CONVEYANCE OFFSITE FLO 686E 1 1997-1123 C GRADING 18908 113TH WAY BE PVT PROP IMPACT NO DRNG INSTALLED 686E2 ' 1997-1123 R GRADING 18908 113TH WAY SE PVT PROP IMPACT NO DRNG INSTALLED 686E2 1997-1179 C DRAINAGE 1911S 121ST PL BE INSTALLATION OF DRNG IN R/W OLD/OFF 686F2 11927"1179 NDA 1997-1179 R DRAINAGE DRAINAGE 19113 19113. 121ST PL 121 SE INSTALLATION OF DRNG IN R/W OLD/QFF 686F2 ST PL SE INSTALLATION OF DRNG IN RMl OLDIOFF 666F2 +� 1997-1301 C DRAINAGE 19125 121ST PL SE SUBSTANDARD INSTL OF DRNG SYS PVT 686F2 1 '997-1505 C TREES 12232 BE 200TH ST DANGEROUS TREES ON COUNTY PROP 666F3 1997-1572 C TREE 12232 SE 200TH ST REMOVAL OF WINDFALLS REQUIRED 686F3 1998-0019 C DRAINAGE 19016 116TH AVE SE NEW GRAVEL RD POSSIBLE PVT PROP IM 686E2 1998-0058 C DRAINAGE 16520 116TH AVE BE SFA CONST IMPACTING ADJACENT PROP 686E2 998-0108 WQC OIL SPLL SE 199 ST/124 AVE SE SPILL OF POLLUTANTS ALONG RD RM/ 686F3 1998-0361 C DRAINAGE 12463 SE 198TH PL INFO REQUEST RE WETLANDIOPEN SPA 696F3 I998-0026 C DRAINAGE 19133 121ST PI. SE APPARENT OBSTRUCTION IN ROAD DRN 666F2 S99-0306 C DRAINAGE 11616 SE 188TH ST ADJACENT PROP PAVED 2500 SO FT 994-0329 FCR SAM800 12317 SE 179TH PL NON NATIVE GROWTH IN R/D FACILITY 686E2 606Fi 9, 503 C FENCE 12465 SE 198TH PL REQUEST FOR FENCE BOLLARDS AT ACC 686F3 2000-0398 C DDM 12625 SE 192ND ST REQUEST TO DIVERT FLOW DISCHARGIN 68OF2 .- 1000-0572 C DDM ACROS 19029 120TH AVE SE APPARENT FILLING OF ROADSIDE DITCH. 686E2 000-0572 R DDM ACROS IS028 120TH AVE SE APPARENT FILLING OF ROADSIDE DITCH. 686E2 2000-0713 C DDM 12232 SE 200TH ST INCREASE FLOWWS IMPACTING DRAINA 686F3 000-0710 NDA- DDM 12232 BE 200TH ST INCREASE FLOWS IMPACTING DRAINAGE 686F3 00-0713 R DDM 12202 SE 200TH ST INCREASE FLOWS IMPACTING DRAINAGE 666F3 2001-0247 FCR MMA 12317 BE 179TH PL IDENTIFIED NOXIOUS WEEDS, 6LACKBE 6aoF1 t1-0322 WQO 11631 SE 164TH ST APPARENT GREY WATER DISCHARGE INT BWE1 ool -0322 WQC WOO 11631 BE 184TH ST APPARENT GREY WATER DISCHARGE INT 686E1 01-0389 WQG WQI SE 180T & 118TH AVE SE POTENTIAL GRAY WATER DISCHARGE. C 686E1 01-0389 WQE W01 SE 1SOT & 118TH AVE SE POTENTIAL GRAY WATER DISCHARGE, C 686E1 2001-0089 WOR WQI SE 180T & 118TH AVE SE POTENTIAL GRAY WATER DISCHARGE, C 686E1 101-0416 WQC WQB 12232 SE 200TH ST CONCERN OF SOAP SUDS BEING DISCHA 686F3 01 -04M WQC WOg 12313 SE 198TH ST APPARENT LACK OF POLLUTANT CON'TR 686173 2001-0455 WOR WOB 12313 SE 198TH ST APPARENT LACK OF POLLUTANT CONTR 686F3 102-0314 C DDM 18524 114TH AVE BE SHEETFLOW ONTO PROPERTY FROM UP 686E1 02-W81 G DUM 11625 SE 164TH ST SOGGY AREA IN YARD. MAYBE THE RIiS 686E1 102-0403 C MMA 12235 SE 199TH ST REQUEST TO REMOVE TREES ON COUNT 666F3 Page 3 of 4 NO",:' . 22. 2004 11: 08AM KC WLRD NO.660 P . fit Ty" Dt Pr,1111111M "AM of Pr" MUMS Tpras PaQa 2 3553 C DTA 19013 114TH CT SE CONCERN REGARDING POSSIBLE SLOUG 686E2 2003-0545 2003.0762 WOR WQA WQB WQAI 18601 126TH PL SF 686I=2 19433 VASHON HWY SW BMPS are ALL IN PLACE 2003-0847 C DDM 19230 116TH AVE SE APPARENT OBSTRUCTION OF OFFSITC C sa6F2 12003-0847 8 DDM 19230 116TH AVE SE APPARENT OBSTRUCTION OF OFFS[TE C 686E2 20W-0909 WQC WODR 16601 126TH PL SE AUTO FLUID RESIDUE ON STREET AS A R 686E2 686F2 2004-0223 FCR THE 18004 124TH AVE 5E Tress removed From Facility D92182. lnv6s#iga 686FI 12004-0286 E MNM 18004 124TH AVE SE Facility D92182 dispersion trench filled/graded 666F1 2004-0286 FCR MNM 18004 124TH AVE SE F'acAity 092182 dispersion trench Filed/graded 686F1 2004-0266 R MNM 18004 124TH AVE SE Fadity D92182 dispersion trench filed/graded 686F1 t004-0337 SUP REC 12462 SE 198TH PL PARKS REQUEST TO INSTALL TRAIL AND 004-0337 SUPF REC 12462 SE 198TH PL PARKS REQUEST TO INSTALL TRAIL AND 686F3 004-0389 I=CS MNM 12232 SE 200TH ST 686F3 004-0483 WQC WQDR 12212 SE 199T11 ST Possible WQ problem of gasoline in storm cyst 686F3 686F3 2004-0745 C DTA 18416 127TH AVE SE 2 pipes From neighbor drain onto complainant's 686F1 1 Page 4 of 4 DEC. 1.2004 10:37AM KC WLRD NO.939 P.1iIiI Ln County Water and Land Resources WLR Division 201 S Jackson St, Suitt: 600 Seattle, WA 98104-3855 FAX 10 /'/t ./ . 44 r' % Fax:. c _ �f b! ZL2 Phone; F11, E Date: L ?0/0 //Z Number of pages including cover sheet: Flom: Candi McKay, Eng Tech TI WLR Storinwater Services Section Phone; 246-296-1900 Fax Number: - 246-296-01 2 IMPORTANT LEVEL 1 ANALYSIS NOTE: We do not send copies of certain complaint types that are not relevant such as BCW, FI, FIR, FIH and W(QA, and we do not send CL and LS types. See key below. Type S 1, S2 and S3 will not be faxed due to size constraints. ' The following is a list of complaint types received by the Water and Land Resources Division Drainage Services Section, Complaint numbers beginning prior to 1990-XXXX have beta aichived and are no longer in our possmsion. They can still be retrieved, if necessary, but will take additional time and ' may not be beneficial to your research due to their age, development which has occurred., etc. If you are interested in reviewing the actual complaints, they can be pulled (time permitting) for your review. Copies can be obtained for $ .15 per page, and $2.00 per page for plans. ' _I ey—S. 'lI W of Investleation Tine of Problem C Action Bequest DCA DecvrJopmemlConenuction RCW tU&iR s'forCl MVIaW DRM Dtslnage-Miscellaneous CCF Respame to Inquiry Ms >� na$F ^ $tvsionlSedimantadbn *CL Claim DLE Drainage —LandslideJAatth Movcmrat EH I311far"Umh t on HOW DTA Drainage Technical Assisi ER Fafarcmuent.Review INQ Pmi.nw—Gmemlrrtquity ' FCL~XR,R:S P-41ity Complaints h2AA Maintenance - Aesthatics FI SWM Fee Inquiry l4W Wntw nca-Flooding Flit SWM Fee Review MMG Mai Qaa=-Gumal M SWM Foo on U014 K04M Maintenance - Mowing 'PIS Limpoit MNM Maintenanm—Needs Maintenance . ' RR lteility $tl necdas Review Lem Nb!z 31anoa-Noxious We*& - NDA Nei0borhood Dm oge Amstarattcp SVM SWM Fee Qttaations WQC Water Quality Cnmpldnt WQS Wager Quality — Beat 14 Magemettt Pracaces WQE Wooer Qualiw P.n[orewrMt WQD Water Quality --bumping ' WQR Wow QlwityvnBi=dngReviaw' WQI WAtmQuality--illloltConnection WOA Water QuaIlty Aadlt RM SWM ftO-RerrMas FMMt WQO WatorQuality--other CIRT 3WMFCO-Grant S1,S21sm RngidMing Studiea NWD SWM Foc-New Discount t"Subject to Public Diiwll�sure cegaiaatmata 1. Rcp4pt dvaitw mqucst for dowumnts 2. lrvkw and approval by Prosmuting Attorney's aftice —DEC. 1. 2004" 10: 38W `KC WLR —No. R39 "—p . 2/ 1 KING COUNTY DEPARTMENT of PUBLIC WORK'5 SURFACE WATER MANAGEMENT DIVISION COMPLAINT INVESTIGATION REPORT pale sec a: .: 1 NATURE OF COMPLAINT: '��CL�n r ;�v 2-v F � O S Rat 041 SEC �TWP2-Z RGE LOCATION: 0KHOL.L PG, _l�l 1 COMPLAINANT: F Z- COUNCIL DIST. PHONE NO. HOME:. Address--17�_ - --- .�+a�e�1.. _ city -- - _State _Zip_ WORK z- P IZ C hDETAILS 0_F•COMPL.AINtT: i, ` L�.Scu�4d �po`o Cam O� 1 @ fboc� 4o�ar-� _ter U CC7 V*^ cM i COMPLAINT RECEIVED BY:" 1 C' IL5 OF INVESTIGAIION: I' Sketch on reverse side- Yes 0 No O Photos:Yes D - No O .. Quanub e 1 � 1 � 07///w 1 - • 06MPC4,, TINVESTIGATED BY: DATE: ACTION TAKEN: 1 . ' Complainant advised of action possible or taken by: phone U Letter ❑ Personal Contact 13 - Complaint Action Handled By' Closed: OK'd. Noma Dale 1n,l,wi= DEC. 1. 2004 10: 38AM —KC WLRD HO.8?9 KING COUNTY suR ACE WATER MANAGEMENT DIVISION DRA NAGS RgVESTIGATION REPORT Page 1: INVEgTic�TioN � P . 3/ 19 A� i�E�uEsr � Recelved by: / Type Date: 9126 l `� G OK'd by- D 0-� Fli - Recsivad from: (Please print plainly for scan I NAME: (Dalee- 'T (fie) PHONE _ ' ADDRESS: V -.. ��� O -4EL—�� _ State_ Location of problem, if different: Jy2 Reported Prablsm; 7--, %� � � 7%7,4 V c La ¢ CO Plat name: 4 far- , We 5 4r-eln C •-vteA,-1 -IRS t?i V � �ther agencies involved, Lot No. 13 Block No: No Field investigation Needed T!1 3ras: New (p Old ?�Cbhi[Ihr_ i+r_. .33., 2� S t/4 S T R Basin Parcel No. �4Q O ZG Kroll �DSee� council Dist-9 Charge No: noclr[ea on q--- KZ - by �phohe fetter ;n person 9- -94 O4 7- f9�rso �cc � r OSITIQN; Turned to on by _ Lead agency has beert notified: �~ Problem has been corrected, No problem has been Identified ' Prlwate problem - NDAP w111 not c0nsiddr because: _ Water originates onsite and/or on neighboring parcel location Is outside SWM Service Area. tE CLOSED: 2 __2�427, by. OR: No further action reeomMended because: prior investigation addresses problem: Sae Fie dE Other (Specify): I le6a Coe--12) - DEC. 1.2004 10:39AM ACC WLRD ,a NO S39 P.4/1 u �Q� ONIN King County Surface Water FII E NO. 96-1 550 Management NAME JEANNIE AILEY M-0-w NM &Wad&. ADDRESS 19121 - 124TH AVE S£ DRAINAGE INVESTIGATION REPORT KHO ROLL 864.989T PAGE sIjG3-I✓2 FIELD INVESTIGATION MAIIVAINPAGE 805 4 DA,T,E 9.13-96 x DIVISION 4 WrlTALs - 1UTAM DETAILS OF INVESTIGATION: 817E VI131T ON O.".6GI. PLUGAED DRAINAGE CROSS CULVERT . INVESTIGATION FOUND SIGTIS OP DRIVEWAY BEING WASHED OUT AT 10121 - 124TIi AVE SP- AN 1a- CONCRETE DRIVEWAY CULVERT WAS FOUND To BE FULL Of SEDIMENT AND GRAVEL WHICH 18 RESTRICTLNa PLOWS. DURING, INVES OAYloN ONLY A SMALL AMOUNT ON WATER WAS PASSING THROUGH THE PIKE. PHOT08 TAKEN * 1 LOOKING AT DRIVEWAY AND SIGNS OF WASHING OUT CAUSED BY PLUG3QEZ CULVERT 0 2 LOOKING AT UPSTREAll END OF CULVEFFT IMPACTED WIT" SKETCH: HOUSE 10171 GRAVEL DRJVww r �;NG ' AREA WIWASHED ouT PpWFR pau 0 ..!.. ! " spo0b anvEHT �.� 1r COTIC PIPE r ! '!' iiii ?'• i �FLDW aIIIEGnoN ROADSIDE DRAINAQ6 r c'ii •• 1 SE 192ND ST DEC. 1.2004 10:39AM KC WLRD HO.8?9 P.5:%1P TO TONY LEDBETTER SUP ERVISpRU;FILOM ROADS DIVISION 4 tAIiRY p ,$REIYTON Sl1RFACATER MAly�p LOCAL DRAIMAGH BpRVI MAIL STOP 9A KIng County MAIL STOP G22 SuMace Water Management a..oq-■ m w do wn... �r�srRX _MESSAGE DATE 9-27-96 FOR YOUR RESPONCE, bRAINAGE PIPE AT 119121 - 124TH AVE SE APPEARS TO BE WITHIN THE 12(r RIQHT OF -WAY AS SHOWN ON THE ACCESSORS; MAP, PIPE APPEARS TO BE PLUQGED. PLEASE REPLY IF ROADS WILL CORRECT. IF NOT POSSIBLE NDA. vp y., sa iaQr�B s7 I REPLY SIGNED SIGNED DATE DEC. 1 , 2�04 1� 4�A KC i1LF2D N0.8�9 iG C:OUNTY WATER ANDLA'T' 1 S4URCE5 DI ISxON E . C F i 7 _� ' I RAJtNAG IWESTIGATION REPORT PROBLEM;,; n� Page 1: INVEmrAnoN REQUEST Type �ECEWED BY: � Date- �i 7K'd b :3? " I1�FILE Q �1 Received 'roar: , NAME: �/ O C c ._ PHONE (Eve) �_LL ADDRESS:_ %� �� �' City �� rd,n/ State Zip S� Location of problem, if different: ' Reported Problem: CALL FILM IJ (VVauld Like To B e Present) . ' � l U P1~T � � -Or � S�"%f�/�N� �C?/C��} L ��Ge-2�", � fro ��:�• /'-/w r / r /f s �ca ' ���'3 r.� �/T�. N , tca .-�-� C.f1- J•.1.l1 +w 7 �,✓ G.�Y4 �%r� �� a � � ��C-�, Tic Giv� 4m-0s -D�4 e Other agencies involved: Lot No: 9 Block No: No field investigation required ''DW -;� Z3 %4 5 T R Parcel No. 1 �g� Kroll (1-- Th Bros: New �Fz ' - - -- Basin _ ppg Council Old Z 1hstE'ct Charge No. .RESPONSE. Citizen notified on by: phone letter in person ~ DISPOSITION: Turned to /(� on / i b Y OR: No further action reoointnended because; Lead agency has been notified: Probiem has been carrected, No problem has been identified, Prior investigation addresses problem: Private problem - NDAP will not consider because: SU FLz 0 _Water originates onsite and/or on neighboring parcel. -.Location is outside WLRD Service Area. Other (Specify): ATE CLOSED: / / P� . By: 1 DEC. 1.2004 10:40AM KC WLRD NO.R-,9 P.7i1 KING C ou.NTy Department of Natural Remouraea Water and Land Resource Dlvlalon DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION - FILE No. 97-1179 rrAmE SIEVE SKOALS ADDRESS 10113 - 121ST PL SE PHONE _864.4201 T$ pAGE Gab-F2 XROLL PACT$ 60$W DATE 1-25. KAIN I: DrvnioN INITIALS - MAM DETAILS OF iNVESTICT TION: SITE VISIT ON 7-24-97. PROPERTY OWNER A7 19125 -121ST PL SE FILLIN(i IN DRAINAGE DITCH WITH V PERF INVESTIGATION FOUND 121ST PL SE IS A PfIIVATj! ROAD WITH AN OPEN DITCH ON THE WEST SIDE OP THE STFIEeT, THE PROPERTY OWNER AT 10129 IS IN TH19 PROCESS OF INSTALLING A a• PEHF PIPE WITH DRAIN BOXES IN THE DITCH IN FRONT OF THEIR PROPERTY, THE FASTING DRIVEWAY CULVERTS ARE 12• CONCRETE, FURTHER INVESTIGATION FOUND A CONTROL STRUCTUREWHICH SERVICES THE DRAINAQE DITCH. IT APPEARS THE PROPERTY OWNER AT 19159 - 121ST PL SE HAS FILLED IN HIS PORTION Or DITCH WITH a' PERF PIPE. PROPIRTY OWNERS MAY BE REDUCING THE STORAGE VOLUME WITHIN THE DITCH BY FILLINa, PHOTOS TAKEN # 1 LOOKING NORTH bOWN 121 BT PL SO_ #t 2 LOOKING AT THE a PERF PIPE INSTALLED BY PROPERTY OWNER AT HOUSE 19133, 0 a SHOWING INBTALLAnON OF PIPE IN FRONT OF HOUSE 10128. '# 4 SHOW1110 INSTALLATION OF a' PERF PIPE IN FRONT OF HOUSE 10125. # a LOOKING SOUTH DOWN 121ST PL SE FROM iN FRONT OF HOUSE 19113. 1 SKETCH: I�Ir}3 VIA u HOUS P lam —� p t p4 Ir PERF DRAIN D 17 A go bl e� 1 CONTROL WMUCTURN 6' (; 12- CONC W N SE 192ND ST DEC. 1.2004 10:41AM KC WLRD NO.339 P.;3i 1' ' RXIMMO"00D DRAIR&GE ASS1.97=CS 8ROG"M C41dpLAINAN"1' rfALTM=QN K=O ' DATE; September 2, 1997 TO: FILE FROM: JEFF' JACOBSON RE: ENGINEERING EVALUATION FOR COMPLAINT NO. 97-1179; Skoals COMPLAINT C RC)NOLOGY: ' ORIGINAL 11 7/21/97 FTELD INV: 7/24/97 Fx= E'VAL: 9/03/97 ' OLD FILE$: N/A EACKGiROMM ; The complainant lives along A private roadway part of Short Plat 879082. The original drainage p2an9 for the short plat show the open ditch aystem on the West side of 1218t Place SE was designed for infiltration/retention as well as conveyance. The open ditch conveys runoff to a control structure located at the intersection of 121st Place SE and SE 192n4 Street. The open ditches have 12-inch c1riveway culverts located intermittently, connecting them to one another. The Complainant is concerned with the recent development in the area, and the intrusiozr upon the ' open ditch system. Last year the resident at 19133 1218t Place SE filled in the open ditch fronting the property as their part of detached garage addition. A 6-inch perforated conveyance pipe was installed before the ditch was filled.. According to the complainant surface water from the open ditches overtopped the roadway and flowed east affecting the residents living on the east aide of 1215t Place SE. This summer the residents at 19125 121st Place SE are filling in their open ditch while adding a 6-inch perforated ' Conveyance line Connected by a seri,ea of lawn drains. as part of their detached garage'construction, The complainant believes the integrity of the drainage system will be severely compromised and future flooding may result activities. from these P'TNDINGS o Since the problem meets all of the MAP project Criteria listed below, it qualifies for and has been investigated under the ZMAD program. ' e The problem site is within the SWM service area and does not involve a Icing County (KC1 code violation. DEC. 1.2004 10:41AM KC WLRD NO.999 P.9"1 [J 1 1 11 ' The prcxblem site shows evid6noe of or reported localized flooding, erosion and/or sedimantation within the off road drainage system on private residential and/or commercial Property due to'later upstream development. • The problem is caused by surface water from more than one adj oi.ning property, SOILS: According to the, RC soils map, the site is located in the following soil association] ALDERW❑OD ASSOCIATION. Moderately well drained undulating to hilly soils that have dense, very alcwly permeable glacial till, at a- depth of 20 to 40 inches; on uplands and terraces. OPTIONS AND DlsCtrSSION: I. An enforcement letter can be sent to the afarementioned residents who filled in the open ditch system. The letter will ask for their cooperation in removing the conveyance systems so the,open ditches can be restored to f=ctiO4 as designed. MWORC>llma IMPACT SCORE . 40 PROPOSED SOLUTION-. An emforcement letter will be sent, l 'QRCMdWT PRIORITY SCORE,' = 40 2 DEC. 1.2004 10:42AM KC WLRD NO.889 E.1.0"; 1 r _ � t ' U MirMir = Land Resourcer, Division ' pepar=enr of Natural Rcsow-ces nil Fifth Avenue, Suite 22oo Seattle, WA 98104-5022 C206) zas-S5i8 (; 66) 29"192 rAX ' September 16, 1997 David Gibson 19I25121' Place SE Renton, WA 98058-7237 RR:KJ County Violation ' Dear Mr. Gibson: ' On $ePtember 2, 1997, Water and Land Resources (WL,R) Division' staff investigated a drainage problem reported in your neighborhood. Owr invesfigation found that the capacity of the existing storm water facility is being reduced by the installation of the drainage: system found in the roadside drainage ditch fronting your property. The drainage ditches were ' established to detain and infiltrate as well as convey storm water. Filling in the ditches ina detract from their ability to control the conveyance of storm water flows,, water onto the roadway and your neighbors' properties. This presents a hazard to public safety. You may not be aware that, as property owner, you could be liable for an PrtY damage that results from this condition. Y personal injury Or We recommend that you ditch fronting yoremove the closed pipe conveyance system found in the- roadside ur Property to help resolve this condition. ' This letter is not an enforcement action or a notification of violation of King County law. Its purpose is to bung this drainage problem to your attention so you can take action before it becomes more serious. ' If you would like more information about flus' problem, or would likecal assistance in resolving it, please call Jeff J obsoonn WLeR Division Loral. Drain#eChmrvices ' Unit Engineer, at 296-1953. Thank you for your attention to this matter. g Sincwely, ' Curt W. Crawford, P.E., pervis' g Engineer T.acal Drainage Services nit CC:JJ;inm(j cc: Glenn Rvans, P.R., Senior Engineer, Local Drainage Services Unit 'Formerly Surface Water Marro ement g OW) Davasivrt DEC. 1.2004 10:42AM KC WLRD NO.2:JTM� P,11,/1C(DPY 1 King county Water and Land.Resourreis Division ' Depaetment ofMatural jtftouroca _ 700 Fifth Avenue, Suite 2200 $eaetie, WA 98104-$= 006i 296-esi9 006) 296-0192 FAX t September 16 19 97 191 V o 3 1 Place Southeast ' Renton, WA 98058-7237 RE: _ ' Dear Mr, Vamgo: ' On September 2, 1997, Water and land Resources ( drainage problem �-R) na,vLszani staff investigated a reported in your neighborhood. Our investigation found the capacity of the existing' storm watx facility has been reduced by the installation of the drainage system ' found its the old roadside ditch system fronting your established to detain and infiltrate as well. as conveys ter. ne drilling inagi e a ditches dihes 1e detracts from their ability to control the conveyance of storm water flows, sending water you may not be awarar ' onto the roadway your neighbors' properties. This presents a hazard to public safety, e that, as PmP�Y owner, you could be liable for an or property damage that Insults from this condition. Y Penal injury ' We recommend that you remove the closed pipe conveyance system, fronting your propert and re-establish the drainage ditch system to resolve this condition. y ' This letter is not an enforcement action or a notification of violation of Ring County law. Its purpose is to bring this drainage problem to your attention so you can take action before it becomes more serious. 1 If you would lika more Mformation about assistance in resolving It, u this drainage problem, or would 3ilc�e technical 'Unit Engineer, at 296-1.953 Thank you Jacobson, ort' our attpn -oh Division this after, Drainage Services matter. Sincerely, ' Curt W. Crawford, P.E.: rervi ' g Lnginerr, . Local age. Services nit CC:JJ:in829 ' cr-' Glenn E'vans,.P.E., Senior Engineer, Local Drain age Savictas Unit 1-Pormerty Auface Wuter 11xanagement (SW division DEC. 1. 2004 1043A i0 KC WLRD�Y WATER AND LAND 1ZESOURCES DIVISION 9 P . 1 E,' 1'_ �� ' DRAINAGE LWESTIGATYON REPORT PROBLEM:- x Page I : INVES G' ATIoN REQuE,s1 Type if OK'd):ry Received from: ' NAME: �aY) ! (Eve) PHONE ' ADDRESS: State ZiF ?Pe S� Location a�'prablem, if different: R { +, 1 2— S T 1PL 3>6,04;C1 .�, Cqi b9ail ' REPorledProhlepn: CALL FIRST (Would Like To Be Present) ' ���7��a� �,,,..! l..rytl'+� �Z � iri c�� I.�� /�/� II��IG��� � �' �r�/°�.'7�•4 � C a r►_1 ng"' ' r . Heine:Cqe.r_d e4ol `rg P .. y. � Lot No; BlockNo: Other agencies involved: 10 ' 97 �2( (Q .- No field investigation required ' %4 S T R Parcel Na, rta ll_L 1W T&Bros: New L r Z - Bashi DD Council District Old RESPo1vsE: Citizen notified on..........._..,.�_ _.._�_ _......_.� .............�-..._.._,�....�........ Charge NQ �� _............W.....�.�...._........,...�....... -- ., by: _ Phone letter in person T 4 1 .. ! 1 1` A,/ �' % FGt tt N x/ Ir r"r a.a_/ ]lisposrriON: Turned to on 1 1 by OR: No further action recommended because: Lead agency has been notified; Problem has been corrected. No problem has been identified. Prior inve tion addresses problem: Private problem - NDAP will not consider because; SEE ME # � Water originates onsite and/or on neighboring parcel, Lacation is outside WLRD Se Othei (Specify): - t P ify) DATE CLOSED: / ! %�' B. ..DEC. 1.2004 10:43AM KC WLRD N0.839 P.1!1,/1: KING C ou TI'Y Department of Naturni RQsourovs Water and Land Rasouroo Division DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION pnm No. 97-1301 NAbLS ANONYMOUS ADDRESS 19125 121ST LPL GE PHONE TB PAOF- &86-F2 DROLL PAGE 605W DATE, 7-25-97 MA]NT DIVISION 4 s - MAM DETAILS OF INVESTIGATION: SITE VISIT ON 7 24-97. PROPERTY OWNER AT 10125 - 1213T PL SE FILLING IN DRAINAGE DITCH WITH 5' PERF. INVESTIOATIOH FOUND 121ST PL SE IS A PRIVATE ROAD WITH AN OPEN BITCH ON THE WEST SIDE OF THE STREET. THE PROPERTY OWNER AT 10126 IS IN THE PROCESS OF INSTALLING A so PERF PIPE WITH DRAIN Col(ES IN THE DITCH IN FRONT Of THEIR PROPERTY. THE E)LISTlNG DRIVEWAY CULVERTS ARE 12' CONCRETE. FURTHER )NVESTIGAnom rouND A CONTROL. STRUCTURE WHICH SERVICES THE DRAINAGE DITCH, IT APPEARS THE PROPERTY OWNER AT 19163 - 1219T PL SE HAS FILLED IN HIS 134I14T1OH OP DITCH WITH W PERF PIPE. PROPERTY OWNERS MAY DE REDUCING THE STORAGE VOLUME WITHIN THE DITCH BY FILLING. COMPLAINT CLOSED TO 97-1179 SE 192ND ST RD p c. 1.?HiM10=4aRMXGKCuuiv WATER AND LA"R-MURCEs D][vIrlo _. DRAINAGE INV"ESTIGATrON REPORT PROBLEM. l V { NO I: INVES-MATION REQUEST 'CEIVED BY: D, A NXZ C- / f �"" Date: nr,.4 i Received from: 10 P.141 : Ir V `I1Y Type b �3' ('r ( NAMF-: E May) ( (Eve) �� f q Para 7�2 • 7�M4 21 7 z - a A.DDRESS: city NState W71 zip �I�D Location of problem, if different:` l+Y OtJ�r�. Reported Prohlem: CALF. FIRST [] Mould Like To Be Present) AVVt_ re cA n pv y, L, yC J lo YD Yam"" Ge11 be A 1 ✓1 �l � ►� 1 Ce. u-•Q L� 4l.! � I � U ,..-��r..J-��1�-•,� �2�- ate" �� � 1 r r 7L ev Crc..e•k-- S� r F0ab6 Tp. 7- agencies involved: Lot No: % f Block No: No field investigation required,! TO BE COMPI (rituals) TED $ Pp"rLAINT pROG1tAM STAFF . -- - /4 S T R P ' axcel Na. �� 3 Z D� 1 Kroll0 Th,Bros: New ' Basin Old 3�Co Council District Charge No. RESPONSE: Citizen notified on lerllr 9 'Zv, K u � � v bY� _ phone letter in person �rizau! /g,�vrrr`1A�ir nif� > oee ��c�l` �, � l� .0 lit D D�.�/6r /SS [� rf de l %T�r� cr= Ar >'S K IJL� `Z" r , HIA,v Z7, �W1aGr4- �►f.</S Ow-r' /.�sr Lay.t' GE'lJ/ T1�,er ✓�1��uG1� % � u�l� .9�}5 .c/ar To i�avap, .-.,e-aS IS!'OSITION: Turned to on ! J by OR:, No fin-ther action recommended because: Lead agency has been notified: Problem has been corrgcted. No problem has been identified. Prior investigation addresses problem: Vk_ private Problem - NDAP will not consider because: sE>~ imr ff Water originates onsite and/or on neighboring parcel. --.Location is outside WZ.R23 a• _—AOtber (Specify) ATE CLOSED. / ! 4 By; ?� '�c�f Q 1 DEC. 1.2004 10=44AM - KC WLRD NO.8�39 KING COUNTY WATER AND LAND RESOURCES MMION DRAINAGE biwsTIGATION REPORT PRo�ar: ��l /N �4 � Page 1: Irrv$s�rG�►7xoN R QtrFsr B�-?- Received from: NAW: Location of problem, if different: .Reported Problem: CALL FIRST 0 P. 15%lt] Type - -� (Day) (Eve) PHONE SAS �' � City �dvTQ✓✓ State,-64JA Zip xxd (Would Me To Be Prey) C. �4 � G G. -,r&- f�i�/�/rl/�C� S �S'?�-r� �.o •y /2. I cI,R 7`� �e] � 1 � l sT PG - S e S w S -,42 /���F/ ��✓ S"�S T � ten/ / 9 2 �: n A IV rlat name: rt/C�J ��%I J JQ�2.Q 1!'? +-- � C-LO- LaC i +1-S ,Ut No: Block No: ' Other agencies involved: No field investigation required initials} /4 S T R Parcel No. aYE2 ^ RroH 6" Th.Bros: New Basin 15X Council District Charge'NO.Old � .RESPONSE: Citizen notified on by: phone letter in person ' G� Cl�l z /��IDru SL Ip�' �� ��� � L°�pSf� �f✓� DL9msrrioN,- Tu med to on by OR: No further action recomm' ended because: . Lead agency has been notified: u �- Problem bas bey corrected, No probk= has beep► ident%fed. Prior investigation addresses problem: Private problem - NDAP ,wil not consider because: .Water Originates onsite and/or on neighboring parcel. X,ocation is outside W RD Servi Other (Specify): DATE CLOSED: I I By: DEC. 1. 2004-10 = 41 AM— ,ZKC WLRD ' KING COUNTY Dapartfnent of Natural Resources Water and Land Rosourco Division DRAINAGE INVESTIGATION REPORT FIELD INVESTIGATION - NO.^a3`3 P.1b/1c _.- FILE NO. 9-8_0926 NAi"Z GARY VANGO- ADDRESS 19IS3 - 121ST PL SE PHONE 3 -2B4 T15 PAGE sue_. _ KROLL PAc3E 605W DATE �2-ss MAINT, DMSION a INT11AL3 - M AM DETAXLS OIL INVESTIGATION: $ITE VISIT ON 1-12,99. STREET DRAINAGE BLOCKED CAUSING DRAINAGE, SYSTEM ON PRIVATE HOAR 70 BACK Up RUCTURE WHICH ❑RAINS INVESTIGATION FOUND THE DRAINAGE SYS7F-m ON 121ST PI- SE HAS A CONTROL STTO A CATCH BASIN IN THE ROAD AIQHT-OF-WAY. THE SLIDE GATE FOIE THE SYSTEM wA3 C1I�EN WHICH ALLOWS POP WATER TO PLOW INTO SYSTEM FROM STR✓ ET CATCH BASIN, CLOSED SLIDE GATT' AT THIS TIME, INSPeGTED STREET NT5 1RAINAGE ON SE 122ND ST JUST EAST OF 121ST PL SE FOR ANY BLOCKAGE. WHEN LINE WAS CANDLED LIGHT REFLECTED BACK. THERE APPEARS To BE A METAL QaJECT ASOUT 13o, 13 -. IEN LINE, TALICA TO DLICHT IT W49 SUGGESTED SLI>7E GAPE BE KEPT CLOSED TO PREVENT A BACK WASH HE INTO PRIVATE SYSTEM, TO MENTIONED COMPLAINANT MEMO WOULD BE SENT TO ROADS TO HAVE THEM INVESTIGATE OBJECT IN PIPE. NO PHOTOS TAKEN . SKETCH - MOUSE SE 792ND ST CA14MAD' PIPE NOTED samr TttPI: OP RLOCKAGE LIGHT RIM-EC76R BACK DEC. 1.2004 10'45AM KC WLRD N3.239 P.17i1'J KING CO- NTY WATER AND LAND RESOURCES DIVISION DRATNAGP INVESTIGATION REPORT INVESTIGATION REQUEST Type ' FR4SrJEM: SIVED sV; AAW Da e�; OK'd b : �� i+' Lr, NNo. _ 432Y Received from: {Day} LqfA (Eve) N' AME fqQnd raj�Wyl ' PHONY ADDRESS: ?.& 2,9 9- NZ City smote 11 Zip LOCATION OF PPOBLEM, IF DIFFERENT: tAccess Permission Granted El Callll Fi' rst (Would i.fke To Be Present) 1 6V� Ct rL:; 1 cc 0 fie. rc' d c.�t� )I kto, p7s wukr fu 6a rl 6t-01�op Flat name: Other agencies involved: 2,2r 5 4 S T R Basin VOME. 10 Lot No: Block No: No field investigation required Kroll -&10 Th.Bros. New � F& FY Council District q Charge N Citizen notified on 97- 16 " D o by; — phone letter L/ _ in person CtaSc,cl o K 6.-Ve) ©D E5 tip. dou"fi� �tSPOSITION; Tumed to on f f by OR No ,further action recommended because: Lead agency has been notified: Problem has been corrected. No problem has been identified. Prior investigation addresses problem: Private problem - NDAP Will not consider because: Water originates onsite and/or on neighboring parcel. Location is outside V&RD Se ice jaea. 1ATU, CLOSED: /o 0 By: 1471ewy LOther (Specifyy)• DEC. 1. 2004"�:10 : 46R'f� *C Complaint 00-0398 Mondragon Investigated by Robert Manes on 5-3I.00 I met with Richard Mondragon and I exPlamed to him that the &kimmg drainage had been in for some tanie and. the Road Dept. would not change it. Richard explained to me 'what he wants to do. He wants to put in art access road from the street to his garage l told him he would have to apply for a grading perfait. I gave him the DDES handouts with an information sheet with phone numbers and address. I suggested that he tzy to avoid filling in t1w low area where the watex backs up from the drainage,, as that may trigger s drainage review an his permit. I closed with him on site_ SE 192"d St. 1Znamp M Top of Low 0 NTS f 304 anp .1 TASK 5 MITIGATION OF EXISTING I AND POTENTIAL PROBLEMS 11 ITASK 5 MITIGATION OF EXISTING AND POTENTIAL PROBLEMS ' The area downstream of the proposed project known as Laurel Springs does not exhibit any potential problems, nor is there evidence of any existing problems in this downstream drainage course. Since the KCSWDM has indicated that Basic Water Quality and Level 2 blow Control are the required means of treating and detaining runoff, this project assumes that those are adequate for this site. This project will ' neither aggravate nor create a problem as specified in the problem specific mitigation requirements as set forth in Section 1.2.2.1 of the KCSWDM as delineated in Task 4 of this report. A Level 2 or Level 3 Off -Site Analysis should not be required for this project site as there is no evidence of existing or ' potential problems identified in this Level I analysis. In addition, the project site is not flat; however, the downstream drainage course is not very steep compared to the site. There is a broad drainage course with existing wetland areas through which Soos Creek has a lot of room to meander. The 100-year floodpiain ' for Soos Creek is a good 6 to 8 feet lower than the lowest point on the project site. The project site does not contribute more than 15 percent of the total peak flow drainage downstream from the site. In addition, since the project site is known to be an erosion sensitive area, special measures will have to be ' instituted during construction to keep sediment from traveling off site. Those measures will be addressed in the Technical Information Report prepared for this development. LEI 1 I 1141 H.008.doc t7P7/tep] APPENDIX I IJ EXHIBIT L Detention Sizing Calculations 1 Pond Sizing Criteria Ist) Pre -developed site = 4.44 acres of till forest 2nd) Developed site Roads and sidewalk = 34,254 SF impervious For the lots, the maximum permitted Iot coverage = 70 percent Lots = 138,700 x 70 percent = 97,090 SF impervious Therefore lot Iandscaping = 138,700 x 30 percent = 41,610 till grass Pond = 14,000 SF impervious Gravel access road = 6,600 x 50 percent eff. imp. area = 3,300 SF impervious And 3,300 SF till grass Total Impervious = 148,644 SF = 3.41 acres and till grass = 44,910 SF = 1.03.acres 4.44 acres 11418.008.doc [JPJ/tep] I'] /,- 9-� ,�-> KCRTS Command CREATE anewTimeSeries -- - - Production of Runoff Time Series Project Location Sea--Tac Computing Series : 11418pre.tsf Regional Scale Factor 1.00 Data Type Reduced Creating Hourly Time Series File Loading Time Series File:C:\KCSWDM\KCDATA\STTF60R.rnf Till Forest 4.44 acres -------------- Total Area 4.44 acres Peak Discharge: 0.358 CFS at 9:00 on Jan 9 in Year 8 Storing Time Series File:11418pre.tsf Time Series Computed KCRTS Command ------------- Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:11418pre.tsf Flow Frequency Analysis --------------------------------------------------------- Time Series Fil.e:11418pre.tsf Project Locatlon:Sea-Tac Frequencies & Peaks saved to File:11418pre_pks Analysis Tools Command _ RETURN to Previous Menu ----------------------- KCRTS Command ------------- CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location Sea-Tac Computing Series 11418dev.ts€ Regional Scale Factor 1.00 Data Type Reduced Creating Hourly Time Series File Loading Time Series File:C:\KC_SWDM\KC_DATA\STTG60R.rnf Till Grass 1.03 acres Loading Time Series File:C:\KC_SWDM\KC_DAI'A\S'PEI60R.rnf Impervious 3.41 acres -------------- Total Area 4.44 acres Peak Discharge: 1.83 CFS at 6:00 on Jan 9 in Year 8 Flow Frequency Analysis Time Series File:11418pre.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates --- Flow Rate Rank Time of Peak (CFS) 0.280 2 2/09/01 18:00 0.0'76 7 1/06/02 3:00 0.207 4 2/28/03 3:00 0.007 8 3/24/04 20:00 0.123 6 1/05/05 8:00 0.215 3 1118/06 21:00 0.181 5 11/24/06 4:00 0.358 1 1/09/08 9:00 Computed Peaks ----Flow Frequency Analysis ------- Peaks- - rank Return Prob (CPS) Period 0.358 1 100.00 0.990 0.280 2 25.00 0.960 0.215 3 10.00 0.900 0.207 4 5.00 0.800 0.181 5 3.00 0.667 0.123 6 2.00 0.500 0.076 7 1.30 0.231 0.007 8 1.10 0.091 0.332 50.00 0.980 Flow Frequency Analysis Time Series File:11418dev.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates --- Flow Rate Rank Time of Peak (CFS) 0.919 6 2/09/01 2:00 0.775 8 1/05/02 16:00 1.10 3 2/27/03 7:00 0.869 7 8/26/04 2:00 1.04 4 10/28/04 16:00 0.978 5 1/18/06 16:00 1.26 2 10/26/06 0:00 1.83 1 1/09/08 6:00 Computed Peaks 1 -----Flow Frequency Analysis------- - - Peaks - - Rank Return Prob (CFS) Period 1.83 1 100.00 0.990 1.26 2 25.00 0.960 1.10 3 10.00 0.900 1.04 4 5.00 0.800 0.978 5 3.00 0.667 0.919 6 2.00 0.500 0.869 7 1.30 0.231 0.775 8 1.10 0.091 1.64 50.00 0.980 Flow Frequency Analysis Time Series File:11418rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates --- Flow Rate Flank Time of Peak (CFS) 0.242 2 2/09/01 20:00 0.059 7 1/07/02 4:00 0.194 3 3/06/03 22:00 0.051 8 8/26/04 7:00 0.059 6 1/08/05 5:00 0.136 5 1/19/06 0:00 0.193 4 11/24/06 8:00 0.917 1 1/09/08 10:00 Computed Peaks -----Flow Frequency Analysis------- - - Peaks - - Rank Return Prob (CFS) (ft) Period 0.917 6.13 1 100.00 0.990 0.242 6.00 2 25.00 0.960 0.194 5.33 3 10.00 0.900 0.193 5.32 4 5.00 0.800 0.136 4.46 5 3.00 0.667 0.059 3.99 6 2.00 0.500 0.059 3.90 7 1.30 0.231 0.051 2.89 8 1.10 0.091 0.692 6.10 50.00 0.980 IReLentioniDetention Facility 1 1 1 Type of Facility Side Slope: Pond Bottom Length: Pond Bottom Width: Pond Bottom Area: Top Area at 1 ft. FB: Effective Storage Depth: Stage 0 Elevation: Storage Volume: Riser Head: Riser Diameter: Number of orifices: Detention Pond 2.00 H:1V 126.00 ft 64,00 ft 8064_ sq, ft 14168, sq. ft 0.325 acres 6.00 ft 386.00 ft 63216. cu. ft 1.451 ac-ft 6.00 ft 18.00 inches 2 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 1.05 0.073 2 4.00 2.00 0.153 4.0 Top Notch Weir: None Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation Surf Area (ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) (sq. ft) 0.00 386.00 0. 0,000 0.000 0.00 8064. 0.01 386.01 81. 0.002 0.003 0.00 8072. 0.02 386.02 161. 0.004 0.004 0.00 8079. 0.03 386.03 242. 0.006 0.005 0.00 8087. 0.04 386.04 323, 0.007 0.006 0.00 8094, 0.05 386.05 404. 0.009 0.007 0.00 8102. 0.07 386.07 566. 0.013 0.008 0.00 8117, 0.08 386.08 648, 0,015 0.008 0.00 8125. 0.09 386.09 729. 0.017 0.009 0.00 8133. 0.19 386.19 1546. 0.035 0.013 0.00 8209. 0,29 386.29 2371. 0.054 0.016 0.00 8286. 0.39 386.39 3203. 0.074 0.019 0.00 8363. 0.49 386.49 4043. 0.093 0.021 0.00 8440. 0.59 386.59 4891. 0,112 0.023 0.00 8518. 0.69 386.69 5747. 0,132 0.025 0.00 8596_ 0.79 386.79 6610. 0.152 0.026 0.00 8674_ 0.89 386.89 7482. 0.172 0.028 0.00 8753. 0.99 386.99 8361, 0.192 0.030 0.00 8832. 1.09 387.09 9248. 0.212 0.031 0.00 8911. 1.19 387.19 10143. 0.233 0.032 0.00 8991_ 1.29 387.29 11046. 0.254 0.034 0.00 9071. 1.39 387.39 11957. 0.275 0.035 0.00 9151. 1.49 387.49 12877. 0.296 0.036 0.00 9232. 1.59 387.59 13804. 0.317 0.038 0.00 9313. 1.69 387.69 14739. 0.338 0.039 0.00 9394. 1.79 387.79 15683. 0.360 0.040 0.00 9476. 1.89 387.89 16634. 0.382 0.041 0.00 9558. 1.99 387.99 17594. 0.404 0.042 0.00 9640. 1 1 2.09 388.09 18562. 0.426 0.043 0.00 9722. 2.19 388.19 19539_ 0.449 0.044 0.00 9805. 2.29 388.29 20523. 0.471 0.045 0.00 9888. 2.39 388.39 21516. 0.494 0.046 0.00 9972, 2,49 388.49 22518. 0.517 0.047 0.00 10056. 2.59 388.59 23528. 0.540 0,048 0.00 10140. 2.69 388.69 24546. 0.563 0.049 0.00 10224. 2.79 388.79 25572. 0.587 0.050 0.00 10309. 2.89 388.89 26607. 0.611 0.051 0.00 10394. 2.99 388.99 27651. 0.635 0.051 0.00 10479. 3.09 389.09 28703. 0.659 0.052 0.00 10565. 3.19 389.19 29764. 0.683 0.053 0.00 10651. 3.29 389.29 30834. 0.708 0.054 0.00 10738. 3.39 389.39 31912. 0.733 0.055 0.00 10824, 3.49 389.49 32999. 0.758 0.056 0.00 10911. 3.59 389.59 34094. 0.783 0.056 0.00 10999, 3.69 389.69 351.98, 0,808 0.057 0.00 11086. 3.79 389,79 36311. 0.834 0.058 0.00 11174. 3.89 389.89 37433_ 0.859 0.059 0.00 11263. 3.99 389.99 38564. 0.885 0.059 0.00 11351. 4.00 390.00 38677. 0.888 0.060 0.00 11360. 4.02 390.02 38905. 0,893 0.061 0.00 11378_ 4.04 390.04 39132. 0.898 0,063 0.00 11396_ 4.06 390,06 39361. 0,904 0.067 0.00 11413. 4.08 390.08 39589_ 0.909 0.073 0.00 11431. 4,10 390.10 39818. 0.914 0.081 0.00 11449. 4.13 390.13 40162. 0.922 0.089 0.00 11476. 4.15 390.15 40391. 0.927 0.099 0.00 11494. 4.17 390.17 40621_ 0.933 0.105 0.00 11511. 4.27 390.27 41777. 0.959 0.118 0.00 11601. 4.37 390.37 42942. 0.986 0.128 0.00 11691. 4.47 390.47 44115. 1.013 0.137 0.00 11781. 4.57 390.57 45298. 1,040 0.145 0.00 11871, 4.67 390.67 46489, 1.067 0.153 0.00 11962. 4.77 390.77 47690. 1,095 0.160 0.00 12053. 4.87 390.87 48900, 1.123 0.167 0.00 12145. 4.97 390.97 50119. 1.151 0.173 0.00 12236. 5.07 391.07 51347_ 1.179 0.179 0.00 12328. 5.17 391.17 52585. 1.207 0.185 0.00 12421. 5.27 391,27 53832. 1.236 0.190 OA0 12514. 5.37 391.37 55088. 1.265 0.196 0.00 12607, 5.47 391.47 56353. 1.294 0.201 0.00 12700. 5.57 391.57 57628. 1.323 0.206 0.00 12794. 5.67 391.67 58912. 1.352 0,211 0.00 12888. 5.77 391,77 60205. 1.382 0.216 0.00 12962. 5.87 391.87 61508. 1.412 0.220 0.00 13077, 5.97 391.97 62820. 1,442 0.225 0.00 13171, 6.00 392.00 63216. 1.451 0.226 0.00 13200. 6.10 392.10 64541, 1,482 0.693 0.00 13295. 6,20 392.20 65875. 1.512 1.540 0.00 13391. 6.30 392.30 67219. 1.543 2.640 0.00 13487. 6.40 392.40 68573_ 1.574 3.940 0.00 13583. 6.50 392.50 69936. 1.606 5.410 0.00 13680. 6.60 392.60 71309, 1.637 6.840 0.00 13777_ 6.70 392.70 72691. 1,669 7.370 0.00 13874. 6.80 392.80 74083. 1.701 7.870 0.00 13972. 6.90 392.90 75485. 1.733 8.340 0.00 14070. 1 11 7.00 393.00 76897. 1.765 8.780 0.00 14168. 7.10 393.10 78319. 1.798 9.200 0.00 14267, 7.20 393.20 79751. 1.831 9.600 0.00 14365, 7.30 393.30 81192. 1.864 9.980 0.00 14465. 7.40 393.40 82644. 1.897 10.350 0.00 14564. 7.50 393.50 84105. 1.931 10.710 0.00 14664_ 7.60 393.60 85576_ 1.965 11.050 0.00 14764. 7.70 393.70 87058. 1.999 11.390 0.00 14865. 7.80 393.80 88549. 2.033 11.710 0.00 14965. 7.90 393.90 90051. 2.067 12.030 0.00 15067. Hyd Inflow Outflow Peak Storage Target Cale Stage Elev (Cu-Ft) (Ac-Ft) 1 1.83 ******* 0.92 6.13 392.13 64891. 1.490 2 0.92 0.28 0.24 6.00 392.00 63263. 1.452 3 1.10 ******* 0.19 5.33 391.33 54645, 1.254 4 1.26 ******* 0.19 5.32 391.32 54487_ 1.251 5 0.98 0.14 4.46 390.46 44036. 1.011 6 1.04 ******* 0.06 3.99 389.99 38611. 0.886 7 0.78 ******* 0.06 3.90 389.90 37559. 0.862 8 0.87 ******* 0.05 2.89 388.89 26561. 0.610 ---------------------------------- Route Time Series through Facility Inflow Time Series File:11418dev.tsf Outflow Time Series File:11418rdout Inflow/Outflow Analysis Peak Inflow Discharge: 1.83 CFS at 6:00 on Jan 9 in Year 8 Peak Outflow Discharge: 0.917 CFS at 10:00 on Jan 9 in Year 8 Peak Reservoir Stage: 6.13 Ft Peak Reservoir Elev: 392.13 Ft Peak Reservoir Storage: 64891. Cu-Ft 1.490 Ac-Ft Flow Frequency Analysis Time Series File:11418rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.242 2 2/09/01 20:00 0.917 6.13 1 100.00 0.990 0.059 7 1/07/02 4:00 0.242 6.00 2 25.00 0.960 0.194 3 3/06/03 22:00 0.194 5.33 3 10.00 0.900 0.051 8 8/26/04 7:00 0.193 5.32 4 5.00 0.800 0.059 6 1/08/05 5:00 0.136 4.46 5 3.00 0.667 0.136 5 1/19/06 0:00 0.059 3.99 6 2.00 0.500 0.193 4 11/24/06 8:00 0.059 3.90 7 1.30 0.231 0.917 1 1/09/08 10:00 0.051 2.89 8 1.10 0.091 Computed Peaks 0.692 6.10 50.00 0.980 Flow Duration from Time Series File:11418rdout.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS % % % 0.003 28017 45.690 45.690 54.310 0.543E+00 0.010 5992 9.772 55.462 44,538 0.445E+00 0.017 5665 9.238 64.700 0.024 5253 8.567 73.266 0.031 5042 8.222 81.489 0.037 4183 6.822 88.311 0.044 2863 4.669 92.979 0.051 1737 2.833 95.812 0.058 1822 2.971 98.783 0.064 375 0.612 99.395 0.071 23 0.038 99.432 0.078 14 0.023 99.455 0.085 15 0.024 99.480 0.092 17 0.028 99.507 0.098 7 0.011 99.519 0.105 18 0.029 99.548 0.112 33 0.054 99.602 0.119 23 0.038 99.640 0.126 33 0.054 99.693 0.132 29 0.047 99.741 0.139 22 0.036 99.777 0.146 16 0.026 99.803 0.153 7 0.011 99.814 0.159 10 0.016 99.830 0.166 14 0.023 99.853 0.173 11 0.018 99.871 0.180 14 0.023 99.894 0.187 12 0.020 99.914 0.193 17 0.028 99.941 0.200 10 0.016 99.958 0.207 10 0.016 99.974 0.214 4 0.007 99.980 0.221 5 0.008 99.989 0.227 6 0.010 99.998 0.234 0 0.000 99.998 0.241 0 0.000 99.998 Duration Comparison Anaylsis Base File: 11418pre.tsf New File: 11418rdout.tsf Cutoff Units: Discharge in CFS -----Fraction of Time----- Cutoff0.062 0.079 0.096 0.113 0.129 0.146 0.163 0.180 0.197 0.214 0.230 0.247 0.264 Base New %Change 0.94E-02 0.63E-02 -32.7 0.62E-02 0.54E-02 -12.9 0.49E-02 0.49E-02 1.0 0.37E-02 0.40E-02 8.9 0.28E-02 0.28E-02 --0.6 0.22E-02 0.20E-02 -9.7 0.15E-02 0.16E-02 11.2 0.96E-03 0.11E-02 10.2 0.60E-03 0.51E-03 -16.2 0.34E-03 0.20E-03 --42.9 { 0.21E-03 0.16E-04 -92.3 0.16E-03 0.00E+00 -100.0 0.82E-04 0.00E+00 -100.0 I 35.300 0.353E,+00 26.734 0.267E+00 18.511 0.1.85E+00 11.689 0.117E+00 7.021 0.702E-01 4.188 0.419E-01 1.217 0.122E-01 0.605 0.605E-02 0.568 0.568E-02 0.545 0.545E-02 0.520 0.520E-02 0.492 0.492E-02 0.481 0.481E-02 0.452 0.452E-02 0.398 0.398E-02 0.360 0.360E-02 0.307 0.307E-02 0.259 0.259E-02 0.223 0.223E-02 0.197 0.197E-02 0.186 0.186E-02 0.170 0.170E--02 0.147 0.147E-02 0.129 0.129E-02 0.106 0.106E-02 0.086 0.864E-03 0.059 0.587E-03 0.042 0.424E-03 0.026 0.261E-03 0.020 0.196E--03 0.011 0.114E-03 0.002 0.163E-04 0.002 0.163E-04 0.002 0.163E-04 ---------Check of Probability Base 0.94E-02 0.062 0.62E-02 0.079 0.49E-02 0.096 0.37E-02 0.113 0.28E-02 0.129 0.22E-02 0.146 0.15E-02 0.163 0.96E-03 0.180 0.60E-03 0.197 0.34E-03 0.214 0.21E--03 0.230 0.16E-03 0.247 0.82E-04 0.264 Maximum positive excursion = 0.006 cfs ( 5.9%) ' occurring at 0.098 cfs on the Base Data:11418pre.tsf Tolerance----- -- New %Change 0.059 -5.1 0.063 -20.4 0.097 1.6 0.118 4.9 0.129 -0.4 0.140 -4.1 0.168 2.7 0.184 2.1 0.193 -1.7 0.204 -4.7 0.213 -7.5 0.217 -12.1 0.224 -15.1 1 and at 0.104 cfs on the New Data:11418rdout.tsf Maximum negative excursion = 0,017 cfs {-21.11�) ' occurring at 0.080 cfs on the Base Data:11418pre.tsf and at 0.063 cfs on the New Data:11418rdout.tsf 1 I 1 Flow Duration from Time Series File:11418gre.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS % % % 0.062 60739 99.053 99.053 0.947 0.947E-02 0.069 116 0.189 99.242 0.758 0.758E-02 0.077 72 0.117 99.359 0.641 0.641E-02 0.085 39 0.064 99.423 0.577 0.577E-02 0.092 37 0.060 99.483 0.517 0.517E-02 0.100 40 0.065 99.548 0.452 0.452E-02 0.108 34 0.055 99.604 0.396 0.396E-02 0.115 30 0.049 99.653 0.347 0.347E-02 0.123 21 0.034 99.687 0.313 0.313E-02 0.131 20 0.033 99.720 0.280 0.280E-02 0.138 19 0.031 99.750 0.250 0.250E-02 0.146 19 O A31 99.781 0.219 0.219E--02 0.154 24 0.039 99.821 0.179 0.179E-02 0.162 17 0.028 99.848 0.152 0.152E-02 0.169 13 0.021 99.870 0.130 0.130E-02 0.177 15 0.024 99.894 0.106 0.106E-02 0.185 13 0.021 99.915 0.085 0.848E-03 0.192 10 0.016 99.932 0.068 0.685E-03 0.200 10 0.016 99.948 0.052 0.522E-03 0.208 7 0.011 99.959 0.041 0.408E-03 0.215 7 0.011. 99.971 0.029 0.299E-03 0.223 2 0.003 99.974 0.026 0.261E-03 0.231 3 0.005 99.979 0.021 0.212E-03 0.239 2 0.003 99.982 0.018 0.179E-03 0.246 1 0.002 99.984 0.016 0.163E-03 0.254 1 0.002 99.985 0.015 0.147E-03 0.262 2 0.003 99.989 0.011 0.11.4F.-03 0.269 3 0.005 99.993 0.007 0.652E-04 0.277 3 0.005 99.998 0.002 0.163E-04 0.285 1 0.002 100.000 0.000 0.000E+00 0.292 0 0.000 100.000 0.000 0.000E+00 0.300 0 0.000 100.000 0.000 0.000E+00 0.308 0 0.000 100.000 0.000 0.000E+00 0.316 0 0.000 100.000 0.000 0.000E+0Q 0.323 0 0.000 100.000 0.000 0.000E+00 0.331 0 0.000 100.000 0.000 0.000E+00 fl 1 FIj u Flow Duration from Time Series File:11418rdout.tsf Cutoff Count Frequency CDF Exceedence Probability CFS % % % 0.003 28017 45.690 45.690 54.310 0.543E+00 0.010 5992 9,772 55.462 44.538 0.445E+00 0.017 5665 9.238 64.700 35,300 0.353E+00 0.024 5253 8.567 73.266 26.734 0.267E+00 0.031 5042 8.222 81.489 18.511 0.185E+00 0.037 4183 6.822 88.311 11.689 0.117E+00 0.044 2863 4.669 92.979 7.021 0.702E-01 0.051 1737 2.833 95.812 4.188 0.419E-01 0.058 1822 2.971 98.783 1.217 0.122E-01 0.064 375 0,612 99.395 0.605 0.605E-02 0.071 23 0,038 99.432 0.568 0.568E-02 0.078 14 0.023 99.455 0.545 0.545E-02 0.085 15 0.024 99.480 0.520 0.520E-02 0.092 17 0.028 99.507 0,492 0.492E-02 0.098 7 0.011 99.519 0.481 0.481E-02 0.105 18 0,029 99.548 0.452 0.452E-02 0,112 33 0,054 99.602 0.398 0.398E-02 0.119 23 0.038 99.640 0.360 0.360E-02 0.126 33 0.054 99.693 0.307 0.307E-02 0.132 29 0.047 99.741 0.259 0.259E-02 0.139 22 0.036 99.777 0,223 0.223E-02 0.146 16 0.026 99.803 0.197 0.197E-02 0.153 7 0.011 99.814 0.186 0.186E-02 0.159 10 0.016 99.830 0.170 0.170E-02 0.166 14 0.023 99.853 0.147 0.147E-02 0.173 11 0.018 99.871 0.129 0.129E-02 0.180 14 0.023 99.894 0.106 0.106E-02 0.187 12 0.020 99.914 0.086 0.864E-03 0.193 17 0.028 99.941 0.059 0.587E-03 0.200 10 0.016 99,958 0.042 0.424E-03 0.207 10 0.016 99.974 0.026 0.261E-03 0.214 4 0.007 99.980 0.020 0.196E-03 0.221 5 0.008 99,989 0.011 0.114E-03 0.227 6 0.010 99.998 0.002 0.163E-04 0.234 0 0.000 99,998 0.002 0.163E-04 0.241 0 0.000 99.998 0.002 0.163E-04 1 E 1 Duration Comparison Anaylsis Base File: 11418pre.tsf New File: 114l8rdout.tsf Cutoff Units: Discharge in CFS -----Fraction of Time ----- ---------Check of Tolerance ------- CutoffBase New %Change Probability Base New Khange 0.062 0.94E-02 0.63E-02 -32.7 0.94E-02 0.062 0.059 -5.1 0.079 0.62E-02 0.54E-02 -12.9 0.62E-02 0.079 0.063 -20.4 0.096 0.49E-02 0.49E-02 1.0 0.49E-02 0.096 0.097 1.6 0.113 0.37E-02 0.40E-02 8.9 0.37E-02 0.113 0.118 4.9 0.129 0.28E-02 0.28E-02 -0.6 0.28E-02 0.129 0.129 -0.4 0.146 0.22E-02 0.20E-02 -9.7 0.22E-02 0.146 0.140 -4.1 0.163 0.15E-02 0.16E-02 11.2 0.15E-02 0.163 0.168 2.7 0.180 f 0.96E-03 0.11E-02 10.2 0.96E-03 0.180 0.184 2.1 0.197 0.60E-03 0.51E-03 -16.2 0.60E-03 0.197 0.193 -1.7 0.214 0.34E-03 0.20E-03 -42.9 0.34E-03 0.214 0.204 -4.7 0.230 0.21E-03 0.16E-04 -92.3 0.21E-03 0.230 0.213 -7.5 0.247 0.16E-03 0.00E+00 -100.0 0.16E-03 0.247 0.217 -12.1 0.264 0.82E-04 0.00E+00 -100.0 0.82E-04 0.264 0.224 -15.1 Maximum positive excursion = 0.006 cfs ( 5.9%) occurring at 0.098 cfs on the Base Data:11418pre.tsf and at 0.104 cfs on the New Data:11418rdout.tsf Maximum negative excursion = 0.017 cfs (-21.1%) occurring at 0.080 cfs on the Base Data:11418pre.tsf and at 0.063 cfs on the New Data:11418rdout.tsf Kin 'gu Conty Department of Development and Environmental Services I)DO Oa ke;c3 alc Avenue Sou I: mes I EarniOn, WA 98055-1210 DDES 11-1-11--.-.-6.:..."-.,,,-,-,., MEMORANDUM Date FIEl.D2,25 FROM: Site Investigator _ BET-H CH--SH I E TO: Engineer bRu CE h ti� ERJIUA) RE: Field Check Observations 1 PROJECT NUMBER I NAME T UJ m O 21w Eli 9 H AN PLAT Address I Location _ E ( ST ALOW2 -SODS 02EEK IN OF 19ZND z Related Project # I ,Name Aui Po i q I � --- Thomas Map Wage (new) (08(o Fu 2 _—Thomas Guide Page (old) LIJ 2. SYN0PSI5 OF PR0PYiSAL S uF D E E `7. l ACR ES CE R- G- SO I NM- 3 5 LQ7 . L� FLC)ti1 CONTROL L E\1 E LS 1 � 2, L A�— 9f WEER, Q uA U TY w 3. SIERRA FILE INFORMATION f Parcel #(s) 3'�)2305 9010I&1990 0t01 S-T-R SW 33'2 -0 z Krall Ma 2 P &0J Acres 1 Feet _._�• (( 1 __Current Zoning R- (a - 5O U Communit;i Plan w — 0 Comprehensive Plan UM ° Limited Text Entry K l(o, ?_. [ 5� �� I�-3 S0 - ZO * PF-rz cal s ~r, Z5 Qua RPpucArnw PAGE f 4. SENSITIVE AREAS INFORMATION MAP FOLIO PAGE# 5 DECONTAINS 51TE ABUTS YES NO YES NO COMMENTS • Wetlands ® ❑ ® ❑ S ,S Cl_EEK Wetland # 5CW ceeEX4 Z Wetland Class Drainage Basin UAW R \11 Sub Basin S C Critical Basin? ❑ ❑N • Streams �� - --- -❑ ® ® ❑QC)S CIS Stream Cass 0 Stream Name SQS CP_EQ� • 100-year Floodplain _❑ ❑ ___❑ ❑ • Erosion Hazard © ❑ � ❑ • Landslide Hazard __❑ .___❑ • Seismic Hazard_______® ❑ ___® ❑ • Coal Mine Hazard ___❑ ©.____❑ • Other known SA's _[] ❑ ❑ ❑ SM l.L CA,V 5L o S Class I or 2 Stream or Class I Wetland within one mile downstream of project site? _ YES _ a S SCQ5CJZffEKt AND CLASS ..i WETUND FEMA FIRM number 52Q�3 C © F In FEMA Floodplain? ❑ Soils Mapped A Map # Best available Topographical Map G qY DF 0 19r-)(o USEaS 215 q 20o' SITE DESCRIPTION MATCHES T.I.R. DESCRIPTION? RECT?QSGULAR OF �■ '- a • 9 Al ' & it p •P 1 ► ri i r I• p ' g1 pC)e • i �r g�f A2_ OM Rt �� • i. i . PAGE 2 6. EXISTING SITE FEATl1RES Unmapped Sensitive Areas: STEVP SLOPES r _� Soils types seen and evidence of soil movement, slides, slumps, erosion, or deposition: 50M E iEQCr51 bQ IN ,DPMNAirES ?IaAn-ED IP AN 1"PrL gDLES Ground Cover: LPtCIC ��1Z(�-`t'i C 12 �5 , fEIZN S� l wClLLguey—Y M.AV1. 11 �i(2 SC.�3p _ MZ' Existing Utilities (hydrants, signs, poles, etc.) shown on site plan? YES _ Wildlife and habitats: _S G?V 1 r.217 L� f�1ecx)fop MAf-'l,PA_LLS"._ 0GIRZ_. _ Water Wells: NONE S ETO Work started on site? K30 Closed depression >5000 feeej Steep slopes? Ow T. DRAINAGE Drainage complaint records SEIP-7 PSI rCH ED Proposal will add >5000ft' of new impervious surface? M ❑N Approximate Area Proposal will collect and concentrate surface and storm water runoff from an upland and site drainage area of over 5000 ft-? © OO Approximate Area Upland Drainage Basin (draining directly onto site): DQ'1uL�6C FP_QM TIl E! WEST- F GW 'TD -NE Sr E — Q f9cAM ouLll-i oN SE ti ,am sir lNTD 112, PIPCUL.VI 0 5CEE 'T� THE DeTli 511ACE ` Fi.cx�J aN1 w>✓s � Cc�if�] C (zA D fL— O W ��1 S Q, QQ t l EZ On -site Drainage: THE n-E D S"F TO 75 LZEYY, W Downstream Drainage (minimum 1/4 mile distance): SOBS Cf9EEK FLOW S -"7�B j2t?=0U(g H E wI�TLA Q ZAA ST 1, UNDER I 2nci ST SG" GMT C Tl NUe S x 1 M l LE ID -ME NEXT P—DAD C 5Sl PQ F� . Drainage Description Matches T.I.R.? TV- 1 S NE S' II"1L -M ' i , L S osA-L - E Ike Is = Y PAGE 3 8. EXISTING ROAD NETWORK On -site Roads OL—D NF2f Q =O_Q jBA-QrLL�`' VISAI,LC_ Adjacent Roads TD E i) QF- SC ST — 2_1 ' WIDE t`10 MA-9Y_10L S-QQ,._SitDVLDE _!S F_) A-p Closest Transit Stop 8. ESTIMATE OF PROJECT IMPACTS ON SOIL AND WATER 9. ADDITIONAL COMMENTS PAGE 4 10 CONSTRUCTION SIGNS WITHIN SOO FEET AND ADJACENT USE I I NUMBER OF PHOTOGRAPHS TAKEN PAGE 5 ATTACHMENT TO MEMORANDUM PROJECT NUMBER: FIELDIOFFICE 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 AetWy: JEW07 Location: Stator PENDING APFUCANT: ITAINITY LAND DEVELOPMENT, LLC Date J1M4r2W4 UF,tL^WV-*.l ® ffi 1 6 AE joc Fans Val Doss H1N �eC .'die MIE Back $ton f- 012(1 Status: :� Cpny� laat! - i Eak back �E€ € Plat Name: WHPMAN PROPERTY PLAT Np. Lots: Desa: F1RELIM1WYPL46T FOR 35-LOTS OFWEHRMAN PRELIMiNAAYPLAT; 3OPE Appked: 12114/2004 ParcelAta�3231Q Deemed Complete: Q1i11l2005 Location: r Vested: 191412004 coy Flip: SEPA (YiNF SEPA TD: j F� Owner: EHAMAN MIARVIN . '. ' ` Report: 1 1 Ap*,ant: ITRINITYLANDOEYELOPMENT,LLC Ope-H iV —/—/ Deasipn: —1-1 Planner KOLA E xp res: —i-1 Rev. Eng.: SWHI Recorded: o� v1-"� — compiele. — Acres: 17, 25 Arr"" Paid $36,134.B1 Balance Due: $0.00 Last Status Ch&Ve: 0112812005 ENered6y 1PINTUIS Develop Dale Entered: 12/14l2w4 Licensee: KING COUNTY, WA . .®Diaz - Wiosoft Qutbok g pPERMITs. Pkn r �.-._.-.�._. ---- ------------ ............._--- ---- _.�.�.�.� �SerialNumber 6136 Users 150 Version Y. 4.7.77 « 11:26 AM Tuesday, Feb 01, 2005 11:26 AM ... _W.. Parcel Number 1�_.�.�.�.�.�_.�__�.�.�.� 332305-9010 . 5 tatus Situs Address Jurisdiction KC Postal City Zip Date Entered 03/05/1999 Owners Name W—EHAMAN i+RVIN Last Update 09f15/MO «<«Location Enformationm>> 114•See-Twp-fang 5 -33-23-C15 ..... Ref.No. I PIatN ame Lot No. ,Acres 1.92 Kroll Pg 605 Traffic MR. Zone School District Fire District Water District Sewer District Blk No. r Sq, Ft. 1 B7935 Engr Map No. J 34 2 Vol, /pg. 403 (Renton)---��.. CIA: G—REEN420 40 Soos Creek 5oos Creek .««<Cievelopment Information»»> Zone 1 R-&SO Zane 2 Zane 3 Zoning Effective Date: Land Use Cade" Compiehensive Plan Community Plan ISOOS Cie Public Water Avail? Public Sewer Avail? r Vacancy Code Tuesday, Feb 01, 2005 11:28 AM <<<<<Location Information>>»> 114-Sec-Twp-Rng SW-33-23-05 Ref.No- � Plat Name jummTERN GARDEN TRACTS DIV NO. 0 Lot No. 15 Blk No. Acres I 5.24 Sq. Et. 228,254 Kroll Pg 1605 Engr Map No. Traffic Mit Zone 342 Vol./Pg. 10471090 Sol Disttick 1403 (Renton) CIA: IGREEN420� Fire District 140 Water District ISoos Creek Sever District ISoos Creek ««<Development Information»»> Zone 1 JR-G-SO Zone 2 Zone 3 Zoning Effective Date. Land Use Code Comprehensive Plan Fum- Community Plan Isoos Cre Public Water Avail? fy— Public Sewer Avail? F Vacancy,Code Tuesday, Feb 01, 2005 11:29 AM Parcel Number I Two I "Sub Type LLexel Date Status Nye fall 0101 LUP'0027 PRE PRE'O:M P 12114120ti4 PENl31NG TE INITY I A JI E EVEI.OPM d _ _ ____.._.__._.. 69 Oi 01 L9dOF0 FOREST ' FORESTa�_.�,[}1t))199 GRAiTED WEHRMAI M4EV1N _._-. _..___ . _....._ -.-.------.._... No HjGs2CCI L�Nt 00- 1 L4A*9 Av1%LAO9 ft a Rorwzn)" AU i' �� Reed: 1 of 3 !� 1F Sekt f?arcel Numbers Like r.1990040101 ; ; fjK tat: �— Type: S ubType: Entered Date Bette: } ! and }_} t A EEC Select MtAtiples & Mace Activity Set f Show AdckettAttachments Select Un-sel Tuesday, Feb 01, 2005 11:29 AM Parcel Number: 3323059010 Taxpayer: WEHRMAN MARVIN Annexation: WA Jurisdiction: Unincorporated King County Situs Address: Postal City: Renton, 98058 Plat Name:; Rec: nil Lot: NIA; Block: NIA Kroll Page: 605 W Thomas Bros. Page: 686 114-S-T-R: SW-33-23-5 Acres: 1.92 (83635 SgFt.) Current Zoning: R-6-SO Potential Zoning; Comp. Plan Land Use: um Assessor's Open Space: NIA Commercial Use: N/A Number of Units: N/A Mobile Home: N Appraised Land Value: 4500 (2004), 4500 (2005) Appraised Improvements Value: 0 (2004), 0 (2005) -------------------- Community Plan Area: Sows Creek Unincorporated Area Council: NIA School District: Renton School District 403 Fire District: 40 Roads MPS Zone: 342 ($3765.00) Roads TCM Zone: 799 - Green (Under Threshold) Waterfront; Water Service: Water Service Planning Area: Soos Creek Water And Sewer District Sewer Service: Airport Noise Remedy Program: NIA Bald Eagle Flag: NIA Council District (1996-2001): 9 Kent Pullen (R) Council District (2002): 5 Dwight Pelz Drainage Basin: Soos Creek, WRIA 9 Police: King County, Pet; 3, Dist; F3 Service/Finance Strategy Area: Full Service Snowload Zone: Standard Agricultural Production District: N Forest Production District: N Rural Forest Focus Area; N TDR Type: NIA TDR Status: NIA TDR Permit Number: N/A ----------------------- Building Inspection Area: S-4 Clearing Inspection Area: Jim Ballweber Code Enforcement Inspection Area: Sheryl Lux ESA Inspection Area: Kathy Newborn Grading Inspection Area: Ramon Locsin Land Use Inspection Area; Tenzing Thinley ----------------------- Sens. Areas Notice(s) on Title: NONE Aquatic Areas Buffer: Y Basin Condition: Medium Flow Control Area: Conservation Water Quality: Basic Critical Aquifer Recharge Area: N Area of Potential Wetland Influence: Y Parcel Number: 6199000101 Taxpayer: WEHRMAN MARVIN Annexation: NIA Jurisdiction: Unincorporated King County Situs Address: Postal City: Renton, 98058 --------------------- Plat Name: NORTHWESTERN GARDEN TRACTS DIV NO. 0 Rec: nil Lot: 5; Block: NIA Kroll Page: 605 W Thomas Bros, Page: 686 1/4-S-T-R: SW-33-23-5 Acres: 5.24 (228254 SgFt.) ---------------------- Current Zoning: R-6-SO Potential Zoning: Comp. Plan Land Use: um Assessor's Open Space: NIA Commercial Use: N/A Number of Units: NIA Mobile Home: N Appraised Land Value: 205000 (2004), 205000 (2005) Appraised Improvements Value: 0 (2004), 0 (2005) -------------------- Community Plan Area: Soos Creek Unincorporated Area Council: NIA School District: Renton School District 403 Fire District: 40 Roads MPS Zone: 342 ($3765.00) Roads TCM Zone: 799 - Green (Under Threshold) Waterfront: Water Service: Water Service Planning Area: Soos Creek Water And Sewer District Sewer Service: Airport Noise Remedy Program; N/A Bald Eagle Flag: NIA Council District (1996-2001): 9 Kent Pullen (R) Council District (2002): 5 Dwight Pelz Drainage Basin: Soos Creek, WRIA 9 Police: King County, Pct: 3, Dist: F3 Service/Finance Strategy Area: Full Service Snowload Zone: Standard Agricultural Production District: N Forest Production District: N Rural Forest Focus Area; N TDR Type: NIA TDR Status: N/A TDR Permit Number: NIA -------------------- Building Inspection Area: S-4 Clearing Inspection Area: Jim Ballweber Code Enforcement Inspection Area: Sheryl Lux ESA Inspection Area: Kathy Newborn Grading Inspection Area: Ramon Locsin Land Use Inspection Area: Tenzing Thinley ----------------- Sens. Areas Notice(s) on Title: NONE Aquatic Areas Buffer: N Basin Condition: Medium Flow Control Area: Conservation Water Quality: Basic Critical Aquifer Recharge Area: N Area of Potential Wetland Influence: Y 50C Page l of 1 0 King County Development Condition Query Results - Parcel Search Parcel Number: 6199000101 Listed below are both Post -Conversion and Pre -Conversion development conditions which are associated with the parcel you entered. To view text for a development condition, choose a condition code in either box below and click on a Get Text button. Otherwise click on 'New Query' at the bottom of this page to perform another parcel search. Post -Conversion Conditions Pre -Conversion Conditions (Effective August 18, 1997) (Prior to August 18, 1997) KCC-16.82.150D SCP-P17 SC-P3 SCP-P3 30-220 SCP-P4 SCP-P7 Get Text _Get Text Click here fora more printer friendly display Updated: December 29, 1998 King County I DDES Page 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. The details. SOC Page 1 of 1 0 King County Development Condition Query Results - Parcel Search Parcel Number: 3323059010 Listed below are both Post -Conversion and Pre -Conversion development conditions which are associated with the parcel you entered. To view text for a development condition, choose a condition code in either box below and click on a Get Text button. Otherwise click on 'New Query' at the bottom of this page to perform another parcel search. Post -Conversion Conditions (Effective August 18, 1997) KCC-16.82.150a SC-P3 SO-220 Get Text Pre -Conversion Conditions (Prior to August 18, 1997) SCP-P17 SCP-P3 SCP-P4 SCP-P7 Get Text ; Click here for a more printer friendly display. Updated: December 29, 1998 King Coup I DDES Page I DDESIGIS Page I New Query I News I Services l 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. The details. Sp,31"I- T Aiwc ZONE K SOUTHEAST 198TH a 30 3?C 09131 F 51995 SOUTHEAST 192ND SOUTHEAST 196TH STREET 0 STREET v' w uI a R w w Q 'a r x � o � rn a SOUTHEAST SE 797TH PLACE PLACE PLACE w SOUTHEAST 198TH STREET w 0 U w SE 198TH ¢ O SEA 198TH STREET N a COURT SOUTHEAST z O 198TH PLACE SOUTHEAST SE 7,qg v�i u �19gTH sTF1EET COURr 9 zz J SOUTHEAST 200TH STREET N rNEAST STREE a w s r- 0 STREET SplSYEi BAST Z01S1 w z w rd ZONE MEEKER JUNIOR HIGH SCHOOL D Q N 366 SE 189TH STREET N V S SE i89TH PLACE m SOUTHEAST 1t PEACE En m SOUTHE 191ST F KIN UNINCOR 127TH I Photo Date: 05101180 WETLAND: Soos Creek 2 LOCATION (S,T,R): 33, 23N, 5E SE 28, 23N, 5E ACREAGE: 134.0 CLASSIFICATION: Inventory Date: 08/04/81 N COMMUNITY PLAN AREA: Soos Creek BASIN OR DRAINAGE: Green River SENSITIVE AREA MAP#: 5 Fish & Wildlife Service Common Name PSS1 Palustrine Scrub -Shrub Broad- Scrub -Shrub leaved Deciduous (Willow) PSS3 Palustrine Scrub -Shrub Broad- Bog leaved Evergreen (Labrador Tea) PF04 Palustrine Forested Needle -leaved Forested Evergreen (Hemlock) PEM5 Palustrine Emergent Narrow- Shallow Marsh POW NOTE: fi Scale: 1" =1000' leaved Persistent (Cattail) Palustrine Open Water Open Water Weiland boundaries shown are approximate. Further field studies are necessary to confirm the actual delineation of the wetland according to the Federal Manual far Identifying and Delineating Jurisdictional Wetlands. Soos Creek 2 OBSERVED SPECIES (refer to Appendix 1): Trees: AR PT TS TP Shrubs: AC CS GS LL RP RS SX SD Herbs: LA MU OS PHRR SD TL Sedges/Grasses/Ferns: SE BXAXAF C'X EX JE JX LM PA Birds: DF GB MA VS TS BS RBAR ST MW SS YT YW WW RS Mammals: Fish: Other: low -bill]' 6 _ 4 Inlet: Type: Condition: Outlet: Type: Pipe/Overland/Undefined. Condition: Open. Outflow enters: Stream. Water movement through wetland: Visible movement of water through wetland. Observed water quality in wetland: SIGNIFICANT HABITAT FEATURES: GENERAL OBSERVATIONS: Litter from park on south edge; fill pushed into wetland from west edge; ponds artificial; bog area is drying up; Cascade Sewer District issued special permit FS-123-83 for sewer line crossing the neck of the wetland. 11/1/84: Field checked.11/27/85: Illegal filling at 12627 Petrovitsky Road. 7/l/86: Building Permit #86-1785. Wetland extends north across Petrovitsky Road - refer to 1990 Sensitive Areas Map Folio for approximate delineation. WETLAND RATING (see Introduction for criteria): I (c) NOTE: Species listed are only those observed during Meld visits. Further field studies are necessary to obtain a complete list including rare, threatened, and/or endangered species. COPYRIGHT 1998 7jow. 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Land Use Services Division 900 Clakesdale Avenue Southwest Renton, WA 98055-1219 SUBJECT: NOTICE OF DECISION SEPA THRESHOLD DETERMINATION AND NOTICE OF RECOMMENDATION AND HEARING WEHRMAN SUBDIVISION L04P0027 Dear Mr. Tibbits: Thank you for the opportunity to review and comment on this project proposal. Renton's Planning/Building/Public Works Department would like to comment as follows: The proposed development is located within the City of Renton's potential annexation area. Therefore, we request that the extension of SE 188th Street and the new north/south street within the development site be constructed to City of Renton standards. Sincerely, Gregg ee man, Administrator Planning/Building/Public Works Dept. cc: Alex Pietsch. EDNSP Administrator Lys Hornsby, Utility Systems Director Peter Hahn. Deputy PBPW Administrator — Transportation Lesley Betlach, Parks Director Jim Gray, Assistant fire Marshall Jennifer Henning, Principal Planner Bob Mahn, Civil Engineering MAN FILE coPv I� I1:% ile Sys1ADM - PBPW Adminstratio&Admin See 1112006%SEPA%070606 SEPA Wehrman Subdi40 1 vision 1.04PO d 1055 South Grady Way - Renton, Washington 98055l{` tNTOT AHEAD OF THE CURVE W This papercentains 50 % recycled material, 30 % post consumer `n CD i31 �- w o��-d 1r m Yl ` a S F-y CD CD CD RD 0 l 1j11' r = j 3 {1 I C d C1. �C b CD C t G 00 �o Q�z y �1EY ` q:n Y i Y March 23, 2006 Mr_ Chris Austin Trinity Land Development 310 29th Street Northeast Puyallup, Washington 98372 li M $9 F y m w fB2111 WENIERNTEM mnsauum Earth Consultants, Inc. Geotechnical Services Department RESPONSES TO CORRECTION NOTICE WEHRMAN PROPERTY SOUTHEAST 188TH STREET NEAR 120TH AVENUE SOUTHEAST KING COUNTY, WASHINGTON ECI Project No. E-11278 References: Earth Consultants, Inc, Geotechnical Engineering Study L-11278, dated October 22, 2006 King County Department of Development and Environmental Services Notice of Request for Additional Information or Studies Dated February 9, 2006 Dear Mr. Austin: As requested, Earth Consultants, Inc. (ECI) is pleased to present this letter responding to the review comments of King County Department of Development and Environmental Services (DDES). We previously prepared the referenced geotechnical engineering study for this project and have been providing consultation services during design. The purpose of this addendum is to respond to the DDES review comments presented in their referenced letter. The geotechnically related comments of the DDES are presented below in italics. Our responses follow. F2nh Consultants, Inc. A Bareax Year," evynpd" 1405 136Eh Mime, MIL, Suitt 2M BCRMC, WA 98005 MAIN1"1 Main: 425 6d.i-i' .r80 �, V c r Fk:: (425) 46-0860 Trinity Land Development March 23, 2006 Wehrman Property E-11278 It would appear that a 2: 1 slope occurs In dense sandy soils where standing water occurring could result in detedorafing of the slope and/or Me wall. Please review this situsfion and provide a narrative, The Tract 8 detention pond will require an excavation of up to 15 feet deep. The pond will be excavated with 2H.1V (Horizontal:Vertical) side slopes. Portions of the pond will include mechanically stabilized earth walls. Based on the conditions encountered at our previous test pit locations, the soils that will be encountered in the pond excavation will consist of recessional outwash comprised of medium dense to dense silty sand with gravel. In our opinion, the pond can be constructed generally as planned. However, the recessional outwash comprising the pond side slopes will be slightly susceptible to erosion. In order to mitigate the potential for erosion, we recommend compacting the side slopes of the pond excavation in place to at least 95 percent of maximum dry density in accordance with ASTM D-1557 (Modified Proctor). We also recommend using a jute erosion control fabric to help maintain the stability of the side slopes until vegetation becomes established. We appreciate this opportunity to have been of continued service to you. If you have any questions, or if we can be of further assistance, please call. Respectfully submitted, EARTH CONSULTANTS, INC. Scott D. Dinkelman. LEG Principal SDD/Jap cc: Barghausen Consulting Engineers, Inc. Attention: Ms. Ivana Halvorsen Earth Consultauta, Inc. A Bureau Vmw Company Page 2 • CIVIL ENGINEERING. LAND PANNING. 3URVE" NC. ENVIRONMENIAL Sta':' CLS April 19, 2006 COURIER DELIVERY Chad Tibbits King County Department of Development and Environmental Services Land Use Services Division 900 Oaksdale Avenue S.W. Renton, WA 98055-1219 RE: Wherman Preliminary Plat King County File No. L04P0027 Our Job No. 11418 Dear Chad: We have revised the plans for the above -referenced project in accordance with your comment letter dated February 9, 2006 and the attached Plat Screening Transmittal. Enclosed are the following documents for your review and approval: 1. Twenty-five (25) copies of the revised preliminary plat map set 2. Two (2) color and five (5) black and white copies of the school walkway conditions maps 3. Eight (8) copies of the geotechnical analysis prepared by Earth Consultants, Inc., dated March 23, 2006 The following outline provides each of your comments in italics exactly as written, along with a narrative response describing how each comment was addressed: Drainage: • Please evaluate the offsite upstream flow entering the site across the west boundary. Revise the conceptual drainage to provide provisions for this flow and a future connection for properties to the west. Response: The preliminary grading and storm drainage plan has been updated to include an upstream storm drainage collection and conveyance pipe system with catch basins and stubs to the north property line that correspond with existing swales in the topography. The upstream collection and conveyance system will collect upstream stormwater and convey it through the site to bypass the stormwater facility. The bypass system outfall is located northeast of proposed Lot 30 outside of the wetland buffer. Roads: • Include a conceptual offsite walkway improvement plan for the proposed walkway improvements. X,' / MAIN FILE CAP 18215 72ND AVENUE SOUTH KENT, WA 98032 {425) 251-6222 (425) 251-8782 FAX zjw?i�POC97 BRANCHOFFICES 4 QLYNIPIA,WA ♦ TEMECULA,CA ♦ WALNUTCREEK,CA www,barghausen.com Chad Tibbits King County Department of Development and Environmental Services -2- April 19, 2006 Response: Please see the school walking conditions exhibit enclosed with this submittal Please provide a detailed (I " = 40' or greater) offsite roadway inventory identifying roadway widths (at regular intervals) including both traveled -ways and shoulders (and including shoulder type and surfacing), and existing constraints: utility poles, driveway culverts and roadside ditches, etc. to widening for the required school walkways_ Response: The detailed off -site roadway inventory is enclosed as part of the school walking conditions exhibit. Pavement widening will occur as determined by the field investigation conducted by Kristen Langley of King County Department of Transportation, and Ivana Halvorsen on Friday, March 31, 2006. Minor shoulder improvements will be required to provide 5 feet of asphalt shoulder in one location on 120th Avenue S.E. and two locations on S.E. 188th Street west of 120th Avenue S.E. S.E. 188th Street east of 120th Avenue S.E. to the project entry and road extension will be improved with 8 feet of paved shoulder. With the required shoulder improvements noted above, the existing ditches may need to be removed and piped, or small retaining walls may need to be constructed within the right-of-way. No off -site easements will be necessary for the shoulder construction activities. The preliminary recommendation for the off -site school walkway is a full -width paved shoulder (or sidewalk) from the subdivision boundary to the intersection of SE 188'1120h Avenue SE (the common point for walkways to the high school bus stop and the walk -way to Benson Hills Elementary, and the bus stop for middle school students), and a combination of full -width paved shoulders or separated paved walkway (minimum width: S feet) from that intersection to (a) the SE 188fh Street/116'h Avenue SE intersection (Benson Hill Elementary students) and (b) the Lindberg High bus stop at SE 184t}Y120rh Avenue SE. Additional pavement should be provided at the SE 188`h1120`h Avenue SE intersection to provide a waiting area for students to assemble while waiting far the bus andlor crossing the street. Response: The applicant agrees to provide a full width (8-feet-wide) paved shoulder from the site entry to 120th Avenue S.E. along S.E. 188th Street. Other localized improvements will be provided as noted above and as depicted on the enclosed school walking conditions exhibit. Critical Areas. • Rockeries on the site plan appear to be too high and too close to the setbacks and should be revised accordingly_ Response: The rockeries have been redesigned to be less than 4 feet when crossing a property line. Rockeries in excess of 4-feet-high will comply with required setbacks. Chad Tibbits King County Department of Development and Environmental Services -3- April 19, 2006 • It would appear there is not an appropriate setback from the slope in several instances where the slope was created with fall, please explain and revise as necessary. Response: We have revised the slopes to make them less than 40 percent so that steep slope setbacks are not required for future development. • What is the purpose of the retaining wall along the drainage facility? How is the retaining wall being integrated into the drainage facility? Response: The retaining wall within the drainage facility allows for transition of grades from the back of the lots to the pond facility and water surface. Please see the enclosed revised Preliminary Grading and Storm Drainage Plan and Profile and Cross -Sections Plan enclosed with the plan set. It would appear that a 2;1 slope occurs in dense sandy soils where standing water occurring could result in deteriorating of the slope andlor the wall. Please review this situation and provide a narrative. Response: Please see the enclosed "response to correction notice" prepared by Earth Consultants, Inc., dated March 23, 2006, relating to the proposed pond design. Minor modifications have been made to the pond in Tract B to ensure compatibility with the geotechnical recommendations for the project. We believe that the above responses, together with the enclosed revised plans, address all of the continents in your letter dated February 9, 2005 and the attached Plat Screening Transmittal. Please review and approve the enclosed at your earliest convenience. If you have questions or need additional information, please do not hesitate to contact me at this office, Thank you. Respectfully, Ivana Halvorsen Senior Planner IH/dm/tep 1141 Sc.021.doc enc: As Noted cc: Chris Austin, Trinity Land Development (w/enc) Daniel K. Balmelli, Barghausen Consulting Engineers, Inc_ Ali Sadr, Barghausen Consulting Engineers, Inc. King County Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 (206) 296-6600 Alternative formats available upon request Drop -Off Cover Sheet for Land Use Services Division ***********************IMPORTANT*********************** PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS Project No.: Poo I — - Proiect Name: FROM: J�VAIJJ� 0R,u0R5[,0 , Barghausen Engineers Company Name 1 Contact Person Telephone No. 425 251-6222 TO: C A t S Date Received by LUSD ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat 1 Plats Please specify item(s) dropped -off: 2-s' of fzc-0_5 P L. 04-- 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: APR 1 9 2006 KC. D.DES. 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 Zonirig/Land Use Technician. Your cooperation is important. Thank you. LUSD Drop -Off Cover Sheet Ig-cvs-dropoff.pdf 05-30-2002Page 1 of 1 (1) ! ! King County Department of Development and Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 February 9, 2006 Trinity Land Development, LLC Attn. Clark McGowan 310 29"' Street NE Puyallup, WA 98372 RE: Notice of Request for Additional Information or Studies Application No. L04P0027— Wehrman Subdivision Date Filed: December 14, 2004 Date of Complete Application: January 11, 2005 Dear Mr. McGowan: 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.: Chad Tibbits, Project Manager II, 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. The deadline for the submittal of the necessary information is May 9, 2006. 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. Ll 0 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- 7194. Sincerely Chad Tibb , Project/Program Manager II Current Planning Section Cc. Barghausen Consulting Engineers, Attn. Ivana Halverson 18215 72nd Avenue S., Kent, WA 98032 Kim Claussen, Project/Program Manager Ili, Current Planning Section, LUSD w/enc Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD w/enc Kristen Langley, Senior Transportation Engineer, LUSD w/enc Larry West, Environmental Scientist III, Critical Areas Section, LUSD w/enc Application File w/enc Plat Screening Transmittal King County Preliminary Plat Application of Wehrman Departinent of Development LUSD File No. L04P0027 and Etiviromnental Services Land Use Services Division Date of Information Request: February 9, 2006 900 enion, sdalesh Washington 9Southwest Deadline for Submittal of Information: Alfa 9 2006 Renton, �i�aslungton 98055-L21} y , Please provide five (5) copies of the following, unless otherwise noted. Drainage: • Please evaluate the offsite upstream flow entering the site across the west boundary. Revise the conceptual drainage to provide provisions for this flow and a future connection for properties to the west. Roads: • Include a conceptual offsite walkway improvement plan for the proposed walkway improvements. • Please provide a detailed 0" = 40' or greater) offsite roadway inventory identifying roadway widths (at regular intervals) including both traveled -ways and shoulders (and including shoulder type and surfacing), and existing constraints: utility poles, driveway culverts and roadside ditches, etc. to widening for the required school walkways. The preliminary recommendation for the off -site school walkway is a full -width paved shoulder (or sidewalk) from the subdivision boundary to the intersection of SE 1881h/1201h Avenue SE (the common point for walkways to the high school bus stop and the walkway to Benson Hills Elementary, and the bus stop for middle school students), and a combination of full -width paved shoulders or separated paved walkway (minimum width: 5 feet) from that intersection to (a) the SE 1881h Street/116" Avenue SE intersection (Benson Hill Elementary students) and (b) the Lindberg High bus stop at SE 184th/120'h Avenue SE. Additional pavement should be provided at the SE 1881h/1201h Avenue SE intersection to provide a waiting area for students to assemble while waiting for the bus and/or crossing the street. Critical Areas: • Rockeries on the site plan appear to be too high and too close to the setbacks and should be revised accordingly. 0 It would appear there is not an appropriate setback from the slope in several instances where the slope was created with fill, please explain and revise as necessary. • What is the purpose of the retaining wall along the drainage facility? How is the retaining wall being integrated into the drainage facility? • It would appear that a 2:1 slope occurs in dense sandy soils where standing water occurring could result in deteriorating of the slope and/or the wall. Please review this situation and provide a narrative. • For questions concerning Critical Areas please contact Larry West, Environmental Scientist III at (206) 296-7131. Revised Preliminary Plat: Provide 25 copies of a revised preliminary plat, as necessary, as a result of above - referenced requests for additional information. 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. Wehrman — L04P0027 02/06 King County Department of Development and Environmental Services 900 Oakesdale Avenue Southwest Renton, WA 98055-1219 January 12, 2006 Trinity Land Development, LLC Attn. Clark McGowan 310-29th Street NE Puyallup, WA 98372 RE: Subdivision — Cancellation of Application Application File No. L04P0027 (Wehrman) Dear Mr. McGowan, On October 6, 2005, you were notified that additional information was necessary to continue the review of the proposed preliminary plat application. The deadline established was January 3, 2006. To date the additional information requested has not been received nor has any other correspondence been received. Therefore, this application has been canceled. A new application submittal will be required in the future if you wish to pursue an application. If you have any questions on this matter, please contact me at (206) 296-7194. Thank you. //I /.-7 �471 ,,,kw — Chad Tiblfits, Planner 11 Current Planning Section CC' Barghausen Consulting Engineers, Attn. Ivana Halvorsen, 18215-72nd Avenue South, Kent, WA 98032 Lisa Dinsmore, Current Planning Supervisor, Current Planning Section, LUSD Km Claussen, Planner III, Current Planning Section, LUSD, Bruce Whiitaker, Senior Engineer, Engineering Review Section, LUSD Kris Langley, Senior Engineer, Traffic & Engineering Section, KCDOT Chad Tibbits, Planner II, Current Planning Section, LUSD, File MAIN FILF- Copy King County Department of Development and Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 January 3, 2006 Trinity Land Development, LLC Attn. Clark McGowan 310 29" Street NE Puyallup, WA 98372 RE: Application_ for the Preliminary Plat of Wehrman DDES File No. L04P0427 Dear Mr. McGowan: The January 3, 2006 letter requesting an extension of the deadline for submittal of the additional information required to process the preliminary plat application of Wehrman has been received. The request for additional information stops all processing of the plat application until the required information is received. The time spent waiting for information to be submitted is not counted toward any time limit requirements of the plat application process. The previous letter established a deadline of January 3, 2006, We are granting an extension to this deadline. If the Land Use Services Division of DDES does not receive the necessary information requested to process your application by February 3, 2006, your application will be canceled or denied. If you have any questions regarding this matter, please call me at (206) 296-7194. Sincerely, ,f Ch Tibbits, ject Manager II Current Planning Section Cc: Barghausen Consulting Engineers, Attn. Ivana Halvorsen, 18215-72n° Avenue South, Kent, WA 98032 Kim Claussen, Project/Program Manager III, Current Planning Section, LUSD Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD Kris Langley, Senior Engineer, KCDOT Application File MAIN FILE COPY 00 00 Kim Claussen King County Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue S.W. Renton, WA 98055-1219 RE: Wehrman Preliminary Plat King County File No. L04PO Our Job No. 11418 Dear Kim: CIVI,LCNGINEERINC, LANDPIANNIyG, SURVEYING, ENVIRONMENTALSERVICES August 19, 2005 COURIER DELIVERY Pursuant to our meeting with you and Bruce Whitaker on July 20, 2005, regarding alternative access scenarios to the project referenced above, enclosed are 10 copies of an alternate access exhibit that shows that the Wehrman project can achieve access without needing a temporary or permanent construction or access easement from Tony Janda to the north. The original preliminary plat application was submitted identifying a temporary construction easement on the Janda property for construction of a public road extension of S.E. 188th Street. Please incorporate the enclosed plan sheet into the review documents. As you aware, this application was submitted on December 14, 2004, approximately eight months ago. If you have any questions regarding this matter or require additional information please contact me immediately. Respectfully, Zllk-"Gt W�- Ivana Halvorsen Senior Planner IH/pj 11418c.016.doc enc: As Noted cc: Chris Austin, Trinity Land Development, L.L.C. (w/enc) Rob Flitton, Trinity Land Development, L.L.C. (w/enc) Daniel K. Balmelli, Barghausen Consulting Engineers, Inc_ Ivana Halvorsen, Barghausen Consulting Engineers, Inc. MAIN FILE CDpV 18215 72ND AVENUE SOUTH KENT, WA 98832 (425) 251-6222 (425) 251-8782 FAX L BRANCH OFFICES ♦ OLYMPIA, WA ♦ TEMECUL4, CA ♦ WALNUT CREEK, CA www.barghausen.com @ 0* 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 PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS Project No.: di--D 117"'062 Project Name: V FROM: rf��� , 13arghausen Consulting Engineers Company Name / Contact Person Telephone No. (425) 251-6222 TO: 6M, Date Received by. LUSD AUG 1 9 lo(i K.C. D.D.E.S. ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat 1 Plats Please specify item(s) dropped -off: 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: f44 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-dropoff.pdf 05-30-2002 Page 1 of 1 (1) 0 0 King County Department of Development and Environmental Services 900 Qakesdale Avenue Southwest Renton, WA 98055-1219 October 6, 2005 Clark McGowan Trinity Land Development LLC 31029"'StNE Puyallup, WA 98372 RE: Notice of Request for Additional Information or Studies Application No. L04P0027 — Wehmnan Dear Mr. McGowan: 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 i Use .n �ai�d ie Se, -Aces t<c .,eS �i v rsvnl Attn: Kim Claussen, Project Manager III, Current Planning Section 900 aakesdale Avenue Southwest Renton, WA 98055-1219 If the submittal is hand delivered, submit at the address above. Your application is on "hold" form 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. The deadline for the submittal of the necessary information is January 3, 2006. 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. MAIN FILE COPY �� • 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 Chad Tibbits at (206) 296-7194. Cc: Barghausen Consulting Engineers, Attn: Ivana Halverson w/enc Chad Tibbits, Planner, Current Planning Section, LUSD w/enc Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD w/enc Kris Langley, Senior Engineer, Traffic & Engineering Section, KCDOT w/enc Application File w/enc Oat Screening Transmittal 0 King count,; Preliminary Plat Application of Wehrman Deparunent ur Development LUSD File No. L04P0027 and Environmental Services Land Use Services Division Date of Information Request: October 6, 2005 9UDUakesdaleAvenue Souihwest Deadline for Submittal of Information: January 3, 2006 Renton, Washington 98055-1219 Please provide ten (10) copies of the following, unless otherwise noted Drainage: The following information must be prepared and stamped by a civil engineer licensed in the State of Washington. • Please revise the level 1 off -site analysis to reflect the current proposal_ The narratives and maps appear include parcels not included in the proposal boundaries_ • Please address off -site upland flow to the site from the west. The level 1 analysis and subbasin maps should show the upstream flow. Note, we found flows from the west in the ditch on SE 188th St., sheet flow from the west and concentrated flow from the southwest corner. Revise the conceptual drainage plan as needed to address the upstream flow. • Please show the 100-year floodplain for any streams and/or wetlands that affect the site. • Include site cross sections referenced on the preliminary site grading plan. Revise the conceptual drainage plan to address frontage and off -site road improvements • Provide preliminary calculations to show the proposed sizing of all the detention facilities. Geotechnical: Provide a geotechnical report prepared by a qualified geotechnical engineer and/or engineering geologist who is licensed in the State of Washington. • The geotechnical report must include an evaluation of possible future landslides on this site. • Prepare at ]east one cross-section located at or between Sections A & B on the site plan received by DDES on December 14, 2004, that shows the subsurface stratigraphy to a depth of at least 50 feet below the ground surface. The section should also show groundwater conditions, and the type, continuity and approximate strength of the soils. It is expected that at least two exploratory borings drilled to a depth of 50 feet will be needed. • Prepare a detailed slope stability analysis, if determined to be necessary, after completing the initial site studies. Roads/Traffic: Provide a TIA with a calculation of the AM and PM peak period levels -of -service for the 1881h/1201h intersection, with and without the connection to the plat of Fleuve des Voiles (L04P0002), and evaluation of turn lanes at the SE 192nd Street/ 1201h Avenue SE intersection (PM peak hour only). Provide field verification of entering and stopping sight distance(s) at the intersection of SE 1881h/ 120th Avenue SE, and proposed stopping sight distance at the intersection of SE 1881h and 123`d (north -south plat street) per 1993 KCRS. Wehrman — L04P0027 10106 • Please provide the eas t or right-of-way documents which*rt nstrate the legal authority to construct the off -site roaprovements to the west. Letters of from affected property owner(s) is required if existing documentation does not exist • Include cross section details plan and profile (vertical alignment) of the off -site and frontage road improvement. Details of the proposed road fill and preliminary geotechnical recommendations is required. A property owner letter of intent for construction of the road fill is required • Provide an offsite road inventory and right-of-way evaluation to verify appropriate access to the site. Walkways: Provide an inventory map (i.e. existing conditions - widths, surface type, etc.) of the walking routes to the elementary, junior high/middle and high school and/or the appropriate bus stop location associated with each school. The school sites for the proposed subdivision are Benson Hill Elementary, Nelsen Middle School and Lindberg High. Identify any improvements necessary to provide safe walking conditions Recreation Space: Demonstrate how the proposed location of the recreation tract is consistent with the requirements of KCC 21A.14.180-200 (Le. centrally located, road frontage, etc.). Submit a conceptual recreation plan which indicates the type of improvements (i.e. sport court, play structure, benches, landscaping, etc.) proposed within the recreation tract. See KCC 21A.14.180 E2 for equipment requirements Revised Preliminary Plat: Provide 25 copies of a revised preliminary plat, as necessary, as a result of above - referenced requests for additional information. 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. Wehrman -- L44POO27 10/05 so O 2 �s Gt"N, £NGAI It Steve Van Patton King County Department of Development and Environmental Services 900 Oakesdale Avenue S.W. Renton, WA 98055-1219 CIVIL ENGINEERING. LAND PLANNING. SURVEYING, ENVIRONMENTAL SERVICES July 11, 2005 COURIER DELIVERY RE: Request for Approval of Right -of -Way Dedication Preliminary Plat of Wehrman Property King County File No. L04P0027 Our Job No. 11418 Dear Steve: On behalf of Trinity Land Development, L.L.C., we are providing this request for your review and approval of right-of-way dedication for a section of S.E. 188th Street, which will be serving the subject preliminary plat. The right-of-way dedication will be deeded by Holmgren to King County with a warranty deed as required. The following items are enclosed for your review: 1. Two copies of the draft quitclaim deed 2. Two copies of the Wehrman title report 3. Two copies of the Holmgren title report 4. Two copies of the preliminary plat map set The proposed right-of-way dedication is provided as a necessity to the Wehrman plat for connectivity from S.E. 188th Street for a fuVare connection to 124th Avenue S.E. and S.E. 192nd Street. Respectfully, Ivan Halvorsen Senior Planner IH/dm 11418c.014.doc enc: As Noted cc: Kim Claussen, King County DDES Chris Austin, Trinity Land Development, L.L.C. Rob Flitton, Trinity Land Development, L.L.C. Daniel K. Balmelli, Barghausen Consulting Engineers, Inc. 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 (425) 251-8782 FAX BRANCH OFFICES ♦ OLYMPIA, WA ♦ TEMECULA, CA ♦ WALNUT CREEK, CA www.barghausen.corn M 2 F a U) W 7 Lu w a 0 Z N M1 r ti m CITY 4§-F RENTON Kathy Keolker-Wheeler, Mayor March 3, 2005 Planning/Building/PublicWorks Department Gregg Zimmerman P.E., Administrator King County Department of Development & Environmental Services Land Use Services Division Ann. Kim Claussen 900 Oakesdale Avenue Southwest Renton, WA 98055-1219 SUBJECT: NOTICE OF APPLICATION, L04P0027 — WEHRMAN SUBDIVISION Dear Ms. Claussen: Thank you for the opportunity of reviewing and commenting on this project proposal. Renton's Planning/Building/Public Works Department comments are as follows: 1. The proposed project is within the Soos Creek Water & Sewer District. 2. The proposed development is within Renton's Potential Annexation Area. Therefore, we request that new streets within the development site be constructed to City of Renton standards. Sincerely, Gregg Zimmerman, Administrator Planning/Building/Public Works Dept. cc: Neil Watts Jennifer Henning Lys Homsby Sandra Meyer MAIN FILF— Cop-*" 1055 South Grady Way - Renton, ashington 98055 -1 w� N T Q N This paper contains 50 % recycled material, 30 % post consumer AHEAD [1 F THE CITY OF RENTON PLANNINGBUILDINGIPUBLIC WORKS MEMORANDUM DATE: February 17, 2005 TO: Jim Gray/Fire Department Lys Hornsby/Utility Systems Sandra Meyer/Transportation Lesley Betlach/Parks Director Alex Pietsch/EDNSP CC: Gregg Zimmerman; PB/PW Administrator FROM: Jennifer Henning; Development Planning SUBJECT: King County DDES Notice of Application L04P0027/Wehrman Subdivision Attached is a copy of the subject Notice of Application. Comments are due to King County DDES. See the attached Notice for Details - Please submit any comments to Gregg's office in a timely manner. Attachment 0 `1J6 Cam_�� al/6" - 0 • DATE: CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM February 17, 2005 TO: Jim Gray/Fire Department Lys Hornsby/Utility Systems Sandra Meyer/Transportation Lesley Betlach/Parks Director Alex Pietsclv'EDNSP CC: Gregg Zimmerman; PB/PW Administrator FROM: Jennifer Henning; Development Planning SUBJECT: King County DDES Notice of Application L04P0027/Wehrman Subdivision RECEIVED FEB 1 7 2005 Transportation Systems Div. Attached is a copy of the subject Notice of Application. Comments are due to King County DDES. See the attached Notice for Details. Please submit any comments to Gregg's office in a timely manner. Attachment ffi�ff�wrl 0 Co 4e mert I"Afe'ni7at 4melea,j oh Ale;; r rhere4oe,, we rejRes+ 4 3f 41w rteuo s4*ed-t wAt, -fAe dc,v*10 pwe., " deb inatwx 2-Ir)/oS - Z -- 0 z w [L CO N w-j _-> U.) (�fjwC)d0 �W0LLJ01) ❑UJCY) v0 c� O w WQO z❑a0�- ¢Y�o W King County Department of Development and Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 January 6, 2004 TO: Kim Claussen, Planner 1I1, Current Planning Section FM: Pat Simmons, Engineer I1, Engineering Review Section Via: Ray Florent, Engineer III,Engineering Review Section Planner: Kim Claussen RE: Proposed Plat for the Wehrman Property LUSD File No. L04P0027 Comments for the above project: The contours must be based on a field survey per KCC 19A.08.150(B)(2). A statement to this effect must be shown on the preliminary map. 2. The Datum used for horizontal control must be stated on the plat per KCC 19A.08.130. Horizontal control used to establish the exterior boundary and field verify the contours needs to be shown on the Preliminary Plat. 2 monuments need to be shown on the preliminary plat. 3. Need 2 Temporary Benchmarks within the application site along with appropriate elevation and Datum(per KCC 19A.08.150(B)(2)). 4. The Bench mark shall be tied to King County Control Network Benchmark Elevation. The location of the Bench mark needs to be on the map(KCC 19A.08.130) The easement to the property is a private easement across the adjoining property to the on site road may need to be private. 6. The Adjoining 10 easement on the North side of the access easement per 6689330 and if this property owner has any rights to use said easement. MAIN FILE COPY King County Department of Development and Environmental Services 900 Oakesdale Avenue SW Denton, WA 98055-1219 January 27, 2005 Clark McGowan Trinity Land Development LLC 310 29th Street Northeast Puyallup, WA 98372 RE: Notice of Complete Application for Application Time Periods Application No. L04P0027 — Wehrman Date Filed: December 14, 2004 Dear Mr. McGowan: The purpose of this letter is to notify you that on January 11, 2005, the Land Use Services Division determined that the above -referenced application is 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. Our goal is to process your application within 150 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 • changes or revisions requested by the applicant • mutually -agreed -upon requests to stop the time clock • preparation of an Environmental Impact Statement • failure to post the property • resolution of land use decisions appeals If you have any questions about your application or the posting requirements, please call me at (206) 296-7167, Sincerely, (Jau"It'.- Im Claussen, Project Manager III Current Planning Section cc: Barghausen Consulting Engineers, 18215 72" d Ave S, Kent WA 98032 Lisa Dinsmore, Supervisor, Current Planning Section Bruce Whittaker, Sr. Engineer, Engineering Review Section, LUSD Application File MAN ki� Uj WVtl King County Department of development and Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 December 14, 2004 Charles Spaeth 6839 Ravenna Ave NE Seattle, WA 98115 RE: Notice of Request for Additional Information or Studies Application No. L04PO002 — Soos Creek Dear Mr. Spaeth: The enclosed preliminary plat application of Wehrman Property (DDES File No. 1-04P0027) was submitted to DDES on December 14, 2004. This proposal adjoins the north boundary of the Soos Creek preliminary plat. As a result of this submittal, please evaluate a road connection between the two proposed subdivisions, and the revise the plat accordingly. It does not appear that a variance to the King Road Standards will be feasible for either proposal. If you have any questions, regarding the additional information or the submittal deadline, please call me at (206) 296-7167. Sincer im laussen, Project Manager III urrent Planning Section enc Cc: Barghausen Consulting Engineers Bruce Whittaker, Senior Engineer, Engineering Review Section, LUSD Kris Langley, Senior Engineer, Traffic & Engineering Section, KCDOT Application Files — L04P0002 & L04P0027 MAIN RLEF COPY PLAT OF WEHRMAN PROPERTY Permit Approval Conditions Document Fire System Review Tracking Number: L04P0027 The following conditions apply to the Fire Engineering approval of the above referenced preliminary plat: AA01 EICHHORN Any questions regarding the fire review of this plan should be directed to: Paul Eichhorn, Fire Engineering Supervisor Telephone: (206) 296-6741. FH01 FIRE HYDRANT WATERMAIN PERMITS A separate permit is required for the installation of watermains and/or fire hydrants. Submit three (3) copies of drawings and specifications to DDES Building Services Division Permit Service Center for a permit application. Review and approval by Fire Engineering Section is required prior to installation. Plans shall include, but are not limited to; pipe sizes, pipe type, valves/fittings, thrust blocks and/or rodding and material listings. Fire hydrants shall be installed per K.C.C. Title 17 Watermains shall be installed and tested per AWWA standards and/or NFPA#24 (STANDARDS FOR PRIVATE FIRE HYDRANTS AND WAT) RMAINS); as applicable. Ref. 1001.4 UFC NOTE: UNLESS SPECIFICALLY NOTED, ANY WATERMAIN OR FIRE HYDRANT DETAILS ON BUILDING PLANSIDRAWINGS HAVE NOT BEEN REVIEWED OR APPROVED. FH74 PRELIMINARY PLAT APPROVAL Preliminary Fire Engineering approval has been granted based upon the following information provided. To obtain final Fire Engineering approval, the following item(s) must be submitted to the DDES permit service center; reviewed and approved: I. Certificate of Water Availability. (Provided by appropriate water purveyor). Valid one year from date of signature. Minimum acceptance flow shall be 1000 gallons per minute at 20 pounds per square inch residual pressure. H. Three copies of plans indicating: A. Fire hydrant(s) location - measured by vehicular travel distance. (K.C.C. Title 17) Residential 1. 700 ft. maximum spacing. 2. Not more than 350 ft. from each lot. B. Watermain placement (K.C.C. Title 1.7) 1. Source (i.e.) supply connection. 2. Main sizes identified. C. Fire access roads Ref. IFC, Sections 501 through 503, 2003 addition 1+'irc Systems Review Approval Conditions Page 1 of 2 0 1. Minimum 20 ft, wide unobstructed - 13'6" vertical clearance, unobstructed. All-weather surface, able to withstand 25 tons. 2. Fire access roads in excess of 150 feet (dead -ends), must have a turn -around area. Required turn-arounds must be a minimum 80-foot diameter **********Including temporary turnarounds************ 3. Fire access roads must provide 20-foot minimum inside turning radius and 40 outside turning radius when said roads change direction. 4. Fire access roads shall not exceed 15% grade. S. The required width of any fire apparatus access road shall not be obstructed in any manner, including parking of vehicles. Minimum required widths and clearances established under this section shall be maintained at all times. D. Marking when required, approved signs or other approved notices shall be provided and maintained for fire apparatus access roads to identify such roads and prohibit the obstruction thereof or both. Ref. IFC, Sections 501 through 503, 2003 edition FH77 FINAL PLAT APPROVAL Final plat approval requires an inspection and approval of the fire hydrant and water main installation by a King County Fire Inspector, prior to recording. Call [8881546-7728 to schedule an inspection; after a_ permit to install has bee obntained from DDES; Fire Protection Endneerinz_— Fire Systems Review Approval Conditions Page 2 of 2 nn* a a REQUEST FOR King County Dept_ of Development and Environmental Services SCHOOL INFORMATION Land Use Services Division 900 Oakesdaie Avenue Southwest PRELIMINARY PLATS Renton, WA 98055-1219 DATE: January 3, 2005 TO: Kent ' School District FM: Kim Claussen, Project Manager III RE: Wehrman (DDES File No. L04P0027) The Land Use Services Division (LUSD) has received an application for a subdivision in your District. Enclosed is a copy of the plat map received by the Land Use Services Division on December 14, 2004. In order for us to adequately evaluate this proposal, provide the most accurate information to the public, and for LUSD to serve the School District better, please provide us with the following information: Which schools do you anticipate the students living in this subdivision would attend? Elementary Jr. High/Middle Sr. High Will the students walk or be bussed to these schools? Elementary Jr. High/Middle Sr. Hi If the students will be bussed, where do you anticipate the bus stops will be located? If that information is not available at this time, currently, where are the closest bus stops located to this site? Elementary Jr. High/Middle Sr. High Other Comments: Please complete this form and return it by February 3, 2005 to the address below. If you have questions regarding this proposal, please call me at 206-296- 7157. Thank you. King County Department of Development and Environmental Services Land Use Services Division ATTN: Kim Claussen, Project Manager III 90C Oakesdale Avenue Southwest Renton, WA 98055-1219 MA1N;qJ'F_ COPY Form96/5PRS/RegSch01.Iaf cic 1/6/20oo SEPA ENVIRONMENTAL CHECKLIST Wehrman Preliminary Plat King County, Washington Submitted to: King County Department of Development and Environmental Services Land Use Services Division Submitted by. Trinity Land Development, L.L.C. Prepared by.• Barghausen Consulting Engineers, Inc. December 10, 2004 Our Job No. 11418 Ste+ x CIVIL ENGINEERING, LAND PLANNING,LVQNG4NVVIRONMENTAL SERVICES - 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251r6222 (425) 251-8782 FAX BRANCH OFFICES 4 OLYMPIA, WA • TEMECULA, CA ♦ WALNUT CREEK, CA www,barghausen.com r�c eN4Gtir�6 0 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 Purpose of the checklist Alternative formats available upon request The State Environmental Policy Act (SEPA), RCW Chapter 43.21 C, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An environmental impact statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. Instructions for the applicants This environmental checklist asks you to describe some basic information about your proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly with the most precise information known, or give the best description you can. You must answer each question accurately and carefully to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer or if a question does not apply to your proposal, write "do not know" or "does not apply", Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations such as zoning, shoreline and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impacts. Check out the DDES Web site at www.metrokc.gov/ddes SEPACheckiist Ic-ckI-SEPA.pdf 5128/03 1141R.003.doc[10111104] Page iof20 A. Background 1. Name of the proposed project, if applicable: Wehrman Preliminary Plat 2. Name of applicant: Trinity Land Development, L.L.C. 3. Address and phone number of applicant and contact person: Applicant: Chris Austin Trinity Land. Development, L.L.C. 310 — 29th Street N.E. Puyallup, WA 98372 (253) 845-2922 Agent: lvana Halvorsen Barghausen Consulting Engineers, Inc. 18215 — 72nd Avenue South Kent, WA 98032 (425) 251-6222 4. Date checklist prepared: December 10, 2004 6. Agency requesting checklist: King County Department of Development and Environmental Services. 6. Proposed timing or schedule (including phasing, if applicable): Prelimmary Plat approval is expected in 2005. Construction is expected to begin in spring 2006 to be completed for recording summer/fall 2006, 7. Do you have any plans for future additions, expansion or further activity related to or connected with this proposal? If yes, explain. Not at this time. Cheek out the DDES Web site at www.metrokc.govfddes SEPA Checklist 1c>ck1-SEPA.pdf 5l28103 11418.003.doc [10111/04] Page 2 of 20 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. Wetland Delineation Report prepared by Barghausen Consulting Engineers, Inc., dated December 6, 2004 • Level 1 Drainage Analysis prepared by Barghausen Consulting Engineers, Inc., dated December 2, 2004 9. Do you know whether applications are pending for government approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. The applicant is not processing any other Government applications related to this property at this time. 10. List any government approvals or permits that will be needed for your proposal, if known. • Preliminary Plat review/approval • SEPA Determination • King County Site Development Permit • WDFW Hydraulic Project approval (if required) • DOE NPDES Permit • Soos Creek Utility District Developer Extension Agreements • King County final plat approval 11. Give brief complete description of your 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. (Lead agencies may modify this form to include additional specific information on project description.) The project proposal involves the subdivision of approximately 7.25 acres of land into 35 single-family residential lots, a public street system, a park tract, and a stormwater facility. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The property is located southeast of the eastern terminus of S.E. 188th Street, north of S.E. 192nd Street. It is located within the southwest corner of Section 33, Township 23 Check out the DDES Web site at www.metrokc.gov/fides SEPA Checklist lc-ckl-SEPA.pdf 6128103 11418.003.doc [10111/04) Page 3 of 20 North, Range 5 East, Willamette Meridian, King County, Washington (King County Parcel Nos: 332305-9010 and 619900-0101). Check out the DDES Web site at www.metrokc.gorfddes SEPA Checklist lc-ckl-SEPA,pdf 5128103 11418.003.doc [10/11/041 Page 4 of 20 B. Environmental elements 1. Earth a. General description of the site (circle or check one): Flat Rolling Hilly Steep slopes Mountainous Other b. What is the steepest slope on the site (approximate percent of slope)? The property slopes at a consistent grade to the east with an overall approximate grade of 25-percent. c. What general types of soil are found on the site (i.e., clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. According to the 1973 King County Soils Survey, the site contains Alderwood gravelly, sandy loam, 0 to 6-percent slopes (AgB), and Alderwood gravelly, sandy loam, 15 to 30-percent slopes (AgD). d. Are there surface indications or history of unstable soils in the immediate vicinity? If so describe. The applicant is not aware of unstable soils on -site or in the surrounding area. e. Describe the purpose, type and approximate quantities of any filling or grading proposed. Indicate source of fill. Due to the topography of the site, it is anticipated that grading will be required for the improvement of the proposed on -site streets and to establish lot pads. The on -site material is probably suitable for structural fill and it is not anticipated that imported or exported material will be required. An earthwork takeoff has not been completed at this stage, but the project may include grading in excess of 60,000 cubic yards, which will be balanced on site as much as possible. If import or export is necessary, then the material will be taken from/to an approved receiving site. Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist Ic-ckI-SEPA.pdf 5/28/03 It 418.003.doc [10/11/041 Page 5 of 20 f. Could erosion occur as a result of clearing, construction or use? If so, generally describe. Erosion could occur due to land clearing activities during construction. Control measures will be implemented prior to clearing, which include constructing drainage ditches, silt control fences, and sedimentation control ponds, if needed. g. About what percent of the site will be covered with impervious surfaces after project construction (i.e., asphalt or buildings)? After full build -out, including new homes, it is expected that approximately 70 percent of the site will be covered with impervious surfaces in accordance with KCC 21.12.030. h. Proposed measures to reduce or control erosion or other impacts to the earth, if any: Clearing will be limited to those areas necessary for the construction of streets, building pads, and utilities during the development stage. Installation of facilities as described in Section 1(F) above will be implemented during the construction phase. 2. Air a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known? The use of diesel -powered construction equipment will result in some transitory air emissions during the construction stage extending for a period of approximately 90 days. Following the completion of the project, air emissions will be due to vehicular traffic and future resident use of vehicles. Some wood smoke can be anticipated from the use of wood -burning fireplaces and during land clearing operations on a limited basis. All the above -stated potential emissions are typical for the construction and use of residential lots. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. Off -site sources of emissions include single-family residential use, the nearby Meeker Middle School to the southeast, and existing Check out the DDES Web site at www.metrokc.gov/ddes $EPA Checklist lc-ckI-SEPA.pdf 5128/03 11418.003.doc [10/11/041 Page 6 of 20 public streets in the area. These sources are not anticipated to negatively affect or be affected by the proposed project. c. Proposed measures to reduce or control emissions or other impacts to air, if any: All applicable EPA and DOE standards governing air quality relative to construction will be followed during the project development. 3. Water a. Surface: Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, salt water, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. A portion of a Class I Wetland and its 100-foot buffer occupy most of the eastern portion of the property (see Tract Q. Soos Creek is also within 200 feet of the 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. Nine of the proposed lots, the park tract, and a portion of the drainage facility are within 200 feet of the Class i wetland and Soos Creek. 3. Estimate the amount of fill and dredge material that would be placed or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. No filling or dredging is proposed to occur in surface waters. 4. Will the proposal require surface water withdrawals or diversions? Give general description, purpose and approximate quantities if known? Currently surface water flows to the east. With the project, most of the project -generated stormwater will be collected and Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist lc-ckl-SEPA.pdf 5128/03 11418.003_doc [10/11/041 Page 7 of 20 conveyed to the property's southeast corner of where it will be treated and released at a controlled rate to the wetland buffer. 5. Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. According to the FEMA FIRM map, the site is located outside of the 100-year flood plain (see map in appendix). 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. Waste materials are not proposed to be discharged into surface waters on or off site. The stormwater drainage facility will release treated water at a controlled rate via a level spreader or equivalent mechanism, that will flow to the east into the Class I wetland. 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. The project proposal does not include withdrawal or discharge into groundwater. 2. Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (i.e., domestic sewage; industrial, containing the following chemicals:...; 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. A public sewer will service the proposed lots on the subject property. No waste material is anticipated to be discharged into the ground. c. Water runoff (including stormwater): 1. Describe the source of runoff (including stormwater) 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. As depicted on the Preliminary Road and Drainage Plan (please see appendix), stormwater runoff will be collected in catch Check out the DDES Web site at www.me&okc.gov/ddes SEPA Checklist Ic-ckl-SEPA.pdi 5128103 11418.003.doe [10/11/04] Page 8 of 20 basins and conveyed in underground pipes to a single combined detentiontwater quality pond in the southeast portion of the site, directly west of the wetland buffer. The detention facility will discharge at a rate similar to the existing runoff rate. The stormwater facility outlet will be trained via a level spreader or equivalent mechanism to the east into the Class I Wetland buffer. 2. Could waste materials enter ground or surface waters? If so, generally describe. Stormwater runoff from paved surfaces, which may include residue from petroleum -based products, will be treated in the combined detention/water quality wet pond that is proposed for this project. d. Proposed measures to reduce or control surface, ground and runoff water impacts, if any: A complete storm drainage system will be designed and constructed to King County standards (1998 KCSWDM), which will include water quality and flow control facilities. A detention pond will store surface water runoff during storm events and will provide release rates similar to existing conditions. 4. Plants a. Check or circle types of vegetation found on the site: ® Deciduous tree: alder, maple, aspen, other ® Evergreen tree: fir, cedar, pine, other ® Shrubs ❑ Grass ❑ Pasture ❑ Crop or grain ® Wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other ❑ Water plants: water lily, eelgrass, milfoil, other ❑ Other types of vegetation b. What kind and amount of vegetation will be removed or altered? Nearly all of the existing vegetation located outside of the wetland/buffer will be cleared for home sites, road, park and stormwater facilities. Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist Ic-cld-SEPA.pdf 5/28/03 11418.Oo3.doc [10/11/04] Page 9 of 20 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 subject property. d. Proposed landscaping, use of native plants or other measures to preserve or enhance vegetation on the site, if any: None. 5. Animals a. Check or 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, on bird , other ❑ Mammals: deer, bear, elk, beaver, other ❑ Fish: bass, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. There are no known threatened or endangered animal species on or near the subject property. c. Is the site part of a migration route? If so, explain. The site may be part of the Pacific flyway. d. Proposed measures to preserve or enhance wildlife, if any: The project provides the full width (100-feet) required buffers from all sensitive areas on site. 6. Energy and natural resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. Electricity will be required to provide street lighting, interior lighting, and heating within future homes. If natural gas is Check out the DDES Web site at www.metrokc.gov/ddes SPPA Checklist Ic-&I-SEPA.pdf 5128103 11418.003.doc [10/11104) Page 10 of 20 available, it will be extended to the property to be available for heating and appliances in future homes. 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: Future homes will be designed to comply with Washington Energy Code for insulation, glazing, etc. 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. The applicant is not aware of any environmental health hazards associated with the site or as a result of the proposed project. 1. Describe special emergency services that might be required. Only typical emergency services for single-family residential subdivisions will be required. 2. Proposed measures to reduce or control environmental health hazards, if any: This item does not apply. 0M04 Z 1. What types of noise exist in the area which may affect your project (i.e., traffic, equipment, operation, other)? Noise levels in the area are generally low and relate primarily to single-family residential uses and automobile traffic from the adjacent roadways and nearby school. These are not expected to affect the project. Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist lc-cld-SEPA.pdf 5128/03 11418.003.doc [10/11/04] Page 11 of 20 2. What types and levels of noise would be created by or associated with the project on a short-term or long-term basis (i.e., traffic, construction, operation, other)? Indicate what hours noise would come from the site. On a short-term basis, noise levels may increase during the day due to operation of construction equipment for the installation of utilities and construction of roads. These noise impacts will be transitory and will be limited to daylight hours. On a long-term basis, the noise levels in the area may slightly increase due to the addition of 35 homes. 8. Land and shoreline use a. What is the current use of the site and adjacent properties? East: Boulevard Lane Park West: Single-family/undeveloped North: Single family/undeveloped South: Single-family/undeveloped, Soos Creek Plat L04P0002 b. Has the site been used for agriculture? If so, describe. The developer is not aware of prior agricultural use of the site. c. Describe any structures on the site. There are no structures currently located on the site. d. Will any structures be demolished? If so, what? This item does not apply. e. What is the current zoning classification of the site? Residential - R-6. f. What is the current comprehensive plan designation of the site? Urban Residential, four to 12 dwelling units per acre. Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist Ic-cId-SEPA.pdf 5/28/03 11418.003.doc r10/E 1/04] Page 12 of 20 g. If applicable, what is the current shoreline master program designation of the site? This item does not apply. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. The western edge of Soos Creek and a Class I wetland encroaches onto the eastern edge of the property. i. Approximately how many people would reside or work in the completed project? We anticipate that approximately 70-90 people will reside in the completed project after all 35 homes are constructed. j. Proposed measures to avoid or reduce displacement impacts, if any: None are required. k. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The proposed development is consistent with existing zoning and Comprehensive Plan designations as it provides urban infill development and meets all of the density criteria of King County Code. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle or low-income housing. There will be 35 residential lots created for 35 single-family residential homes, probably within the middle -income level. Housing units may be attached (zero lot line) or detached residences. All lots will be fee -simple ownership. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle or low- income housing. No units will be eliminated. Check out the DDES Web site at www.metrokc.gav/ddes SEPA Checklist Ic-ckI-SEPA.pdf 5128/03 11418.003.doc t10/11/04) Page 13 of 20 c. Proposed measures to reduce or control housing impacts, if any: None. 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? The tallest structure will be a residential house with height as allowed by the zoning (35 feet). Most houses will typically be two stories, measured from the average ground elevation. b. What views in the immediate vicinity would be altered or obstructed? There are no views in the vicinity of the property to be impacted by the development. c. Proposed measures to reduce or control aesthetic impacts, if any: The use of typical residential landscaping. 11. Light and glare a. What type of light and glare will the proposal produce? What time of day would it mainly occur? The project will produce limited light and glare, primarily from local streetlights and vehicular headlights. These lights will mostly be noticeable in the early evening hours. b. Could light or glare from the finished project be a safety hazard or interfere with views? Not to our knowledge. c. What existing off -site sources of light or glare may affect your proposal? None to our knowledge. Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist lc-ckl-SEPA.pdf 5128103 11418.003,dx [10/11104] Page 14 of 20 d. Proposed measures to reduce or control light and glare impacts, if any: Light and glare impacts will be minimal, although the use of landscaping could potentially further reduce these impacts. 12. Recreation a. What designated and informal recreational opportunities are in the immediate vicinity? • Boulevard Lane Park is located directly to the east. There is an existing informal trail in the BPA easement that connects to Boulevard Lane Park. • Meeker Middle School is located approximately 1/8-mile to the southeast. • Kent Ridge High School is located approximately 1 mile to the south. b. Would the proposed project displace any existing recreational uses? If so, describe. No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: An on -site park tract is provided, which will contain a tot lot and playground equipment. A trail connection will be provided to the existing informal trail to Boulevard Lane Park to the east. 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. The applicant is not aware of any registered preservation status on or near the site. Check out the DDES Web site at www.mei rokc.gov/ddes $EPA Checklist lc-ckISEPA.pdf 5128/03 11418.003.doc [10/11/04] Page 15 of 20 b. Generally describe any landmarks or evidence of historic, archaeological, scientific or cultural importance known to be on or next to the site. The applicant is not aware of any historically significant landmarks on or near the site. c. Proposed measures to reduce or control impacts, if any: None are proposed. 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. To the southeast, the site is the existing unopened right-of-way of 124th Avenue S.E. Improvement of 124th Avenue S.E. is not viable because any constructed improvements would have to impact portions of a large Class I wetland. To the west, the site is served by an existing 40-foot wide access easement across private property extending from the eastern terminus of S.E. 188th Street. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? There are no transit routes located within one mile of the project site. The closest route is METRO 160/163, at S.E. 208th Street and 124th Avenue S.E. c. How many parking spaces would the completed project have? How many would the project eliminate? Each lot will provide a minimum of two off-street parking stalls. No parking spaces will be eliminated as part of this proposal. 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). The proposal includes the construction of a public, half -street extension of S.E. 188th Street entering the site from the west at the northwest corner of the property. The applicant proposes that the plat road terminate in a temporary cul-de-sac bulb at the southern property line to allow a future connection. It is expected that the Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist lc-cklSEPA.pdf 5/28/03 11418.003.doc [10/11/041 Page 16 of 20 half -street improvement of S.E. 188th Street will be completed to a full -street standard when the property to the north is developed. 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. The project is expected to generate a maximum of 335 vehicular trips per day, with a peak hour volume of 35 trips. There are currently peak hour times during the day, generally between 7-8 a.m., and 5-6 p.m. g. Proposed measures to reduce or control transportation impacts, if any: Construction of on -site roads is in accordance with the 1993 King County Road Standards for right-of-way width and improvement cross -sections. In addition, it is expected that the project will pay proportional traffic mitigation fees in accordance with King County regulations. 15. Public services a. Would the project result in an increased need for public services (i.e., fire protection, police protection, health care, schools, other)? If so, generally describe. As typical for single-family lots, an incremental increased need public services. the proposed project will result in or fire, school, police, and other b. Proposed measures to reduce or control direct impacts on public services, if any: Long-term impacts and the need for public services will be mitigated through the collection of tax revenues that provide the primary funding mechanisms for these services. Check out the DDES Web site at www.metrvkc.gov/ddes SEPA Checklist lc-ckl-SEPA.pdf 5/28103 11418.003.doc [10/11/04] Page 17 of 20 16. Utilities a. Check or circle utilities currently available at the site: ® Electricity ® Natural gas ® Water ® Refuse service ® Telephone ® Sanitary sewer ❑ Septic system ❑ 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. Power: Puget Sound Energy Cable Television: Comcast Water: Soos Creek Water & Sewer District Sanitary Sewer: Soos Creek Water & Sewer District Telephone: Qwest Communications Natural Gas: Puget Sound Energy Utility pipes/mains exceeding 12 inches in diameter may be installed within or beyond the project and/or nearby rights -of -way as necessary to serve the proposed development. Utility improvements may result in additional impacts to sensitive areas that will be mitigated as required. 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: Date submitted: /2//0°-/ Check out the DDES Web site at www.metrokc.gov/ddes SEPA Checklist Ic-cki-SEPA.pdf 5/28/03 11418.003,doe [10/11/04] Page 18 of 20 SEPA APPENDIX Vicinity Map (Ref. Thomas Guide, page 686) • Reduction of Plan Set (8%' x I V no scale), including: ➢ Preliminary Plat Site Plan (Sheet 1 of 2) ➢ Preliminary Road and Drainage Plan (Sheet 2 of 2) • King County Soil Survey (Excerpt) FEMA FIRMette Flood Plain Map (53033C0991 F) Metro Bus Route 160/163 Map and Schedule J 0- i ,■,A/�V EYJJ ��.1�J�kY1�1 �-�--rnl l*»-Ilnlnalrtll a+.[v-In1 oPl �n ilal rex�wtl +al4a .I+lqullwrwVlnl\mllti� AZUgdO2fcFNVNZrRZMMLAIT SIA40 OVINW lP� �qri ]Op�01�10'/IS�YR BSI !IO! 3! 133lt8 Films - OIE vv ..., r r. mo.s ,,, u,�,ou lY Id dNVI1"rBld w11L 1Fa1d03A30 QK1 JUf 1L � nras Nrav mu flaw N . w NO Ig -1 1 i I lip,1IRI pY q �Y d� ur Ry lilj _~ p 4@I @ a 111161�i n SaR 4 i aaa s a x 6 E � ea§ a i 9� F � .Y 6IXAINRR11 R1tFR 8dR 11419 SOIL SURVEY King County Area Washington 0 UNITED STATES DEPARTMENT OF AGRICULTURE Soil Conservation Service in cooperation with WASHINGTON AGRICULTURAL EXPERIMENT STATION Issued November 1973 SOIL CONSERVATION SERVICE KING WILIN I T AKtA, SOIL LEGEND The first capital letter is the initial one of the so[l name. A second capital letter, A, B, C, D, E, or F, Indicates the class of slope. Symbols without a slope letter are those of nearly level soils. SYMBOL NAME } AgB Alderwood gravelly sandy loom, 0 to 6 percent slopes AgC Alderwocd gravelly sandy loam, 6 to 15 percent slopes Ago Alderwood gravelly Sandy loom, 15 to 30 percent slopes AkF Alderwood and Kitsap aolIs, very steep AmB Arents, Alderwood material, 0 to 6 percent slopes AmC Arents, Alderwood material, 6 to 15 percent alop" a An Arents, Everett material it _ BeC Beausite gravelly sandy loam, 6 to 15 percent elopes BeD Beausite gravelly sandy,loom, 15 to 30 percent slopes 34f, t3aair60a.gravat:y'.';:�idy eh Bellingham slit loom Br Briscot silt loam Bu, Buaklay slit loam Cb coastal Beaches Ea Earlmont silt loam - Ed Edgewick fine sandy loam EvB Everett gravelly sandy loam, 0to 5 percent slopes EvC Everett gravel ly sandy loam, 5 to 15 percent slopes EvD Everett gravel ly sandy loam, 15 to 30 percent slopes EwC Everett-Alderwood gravelly sandy looms, 6 to 15 percent slopes InA Indian6la-loamy line sand, 0 to 4 percent slopes Inc Indianola loamy fine sand, 4 to 15 percent slopes In0 Indianola loamy fine sand, 15 to 30 percent slopes KpB Kitsap silt loam, 2 to 8 percent slopes KpC Kitsap silt loam, 8 to 15 percerd slopes KpD Kitsap silt loom, 15 to 30 percent slopes KsC Klaus gravelly loamy sand, 6 to 15 percent slopes Ma Mixed alluvial land NeC Neilton very gravelly loamy sand, 2 to 15 kcent slopes Ng Newberg silt loam Nk Nooksack silt loom Na Norma sandy loam Or Orcas peat Rs Oridia silt loam OvC Ovo[I gravelly loam, 0 to 15 percent slopes OvD Oval) gravelly loam, 15 to 25 percent slopes O+F Oval[ gravelly loam, 40 to 75 percent slopes Pc Pilchuck loamy fine sand Pk Pllchuck fine sandy loom Pu Puget silty clay loam Py Puyallup fine sandy loam RaC Ragirw fine sandy loom, 6 to IS percent slopes RaD Rognar fine sandy loam, 15 to 25 percent slopes RdC Ragnar-Indianola association sloping a RdE Rogrwr-lndlanola association, moderately steep • Re Renton silt loam - Rh Riverwash Sa Sclal silt loam _ Sh Sammamislr silt loam Sk Seattle muck Sm Sholcor muck Sn Sl silt. loam So Snohomish silt loam Sr Snohomish slit loam, thick surface variant Su Sultan slit loom To Tukwila muck Ur Urban land Wo Woodinville sill loam 10 The composition of these unili is more variable than that of the others in the area, but'It has been controlled well enough to interpret for the expected use of the soils. T " 4�1 ML TV A�l low, az�<AlFFt7 r �' "� ►� Permeability is moderately rapid in the surface layer and subsoil and very slow in the substratum. Roots penetrate -easily to the consolidated substra- tum where they tend to mat on the surface. Some roots enter the substratum through cracks. Water moves on top of the substratum in winter. Available water capacity is low. Runoff is slow to medium, Nthe hazard of erosion is moderate. This soil is used for timber, pasture, berries, and and row crops, and for urban development. Capability t IVe-2; woodland group 3dl. Alderwood gavelly sandy loam 0 to 6 percent Slopes (A&B)'.--This soils nearly level an un—duna'ting. It is similar to Alderwood gravelly sandy loam, 6 to 15 percent slopes, but in places its surface layer is 2 to 3 inches thicker, Areas are irregular in shape and range from 10 acres to slightly more than'600 acres in size. Some areas are as much as 15 percent included Norma, Bellingham, Tukwila, and Shalcar soils, all of which are poorly drained; and some areas in the vicinity of Enumclaw are as much as 10 percent Buckley soils. Runoff is slow, and the erosion hazard is slight. This Alderwood soil is used for timber, pasture, erries, and row crops, and for urban development. ability unit IVe-2; woodland group 3d2. Alderwood gravelly sandX loam, 15 to 30 ercent sloes AgD). -Depth to the substratum in this soil varies within short distances, but is commonly about 40 inches. Areas are elongated and range from 7 to about 250 acres in size. Soils included with this soil in mapping make up no more than 30 percent of the total acreage. ome areas are up to 25 percent Everett soils that _ ave slopes of 15 to 30 percent,and some areas are up to 2 percent Bellingham, -Norma, and Seattle soils, which are in depressions. Some areas, especially on Squak Mountain, in Newcastle Hills, and north of Tiger Mountain, are 25 percent Beausite and Ovall soils. Beausite soils are underlain by sandstone, and Ovall soils by andesite. Runoff is medium, and the erosion hazard is severe. The slippage potential is moderate. This Alderwood soil is used mostly for timber. Some areas on the lower parts of slopes are used for pasture. Capability unit VIe-2; woodland group 3dl. Alderwood and Kitsag soils, very ste (AkE).-- This mapping unit is about 50 percent AIL gravelly sandy loam and 25 percent Kitsap silt loam. Slopes are 25 to 70 percent. Distribution of the soils varies greatly within short distances. About 15 percent of some mapped areas is an included, unnamed, very deep, moderately coarse textured soil; and about 10 percent of some areas is a very deep, coarse -textured Indianola soil. Drainage and permeability vary. Runoff is rapid to very rapid, and the erosion hazard --is severe to very severe. The slippage potential is severe. These soils are used for timber. Capability unit Vlie-1; woodland group 2dl. f0 Arents, Alderwood Material Arents, Alderwood material consists of Aldexxood soils that have been so disturbed through urb ization that they no longer can be classified the Alderwood series. These soils, however, have many similar features. The upper part of the soil, to a depth of 20 to 40 inches, is brown to dark - brown gravelly sandy loam. Below this is a grayish - brown, consolidated and impervious substratum. Slopes generally range from 0 to 15 percent. These'soils are used for urban development. Arents, Alderwood material, Q to 6 rcent sl es (AmB .--In many areas t.is soil is level, as a result of shaping during construction for urban facilities. Areas are rectangular in shape and range from 5 acres to about 400 acres in size. Representative profile of Arents, Alderwood material, 0 to 6 percent slopes, in an urban area, 1,300 feet west and 350 feet south of the northeast corner of sec. 23, T. 25 N., R. 5 E.: 0 to 26 inches, dark -brown (10YR 4/3) gravelly sandy loam, pale brown (10YR 6/3) dry; massive; slightly hard, very friable, non - sticky, nonplastic; many roots; medium acid; abrupt, smooth boundary. 23 to 29 inches thick. 26 to 60 inches, grayish -brown (2.5Y 5/2) weakly consolidated to strongly consolidated glacial till, light brownish gray (2.5Y 6/2) dry; common, medium, prominent mottles of yet sh brawn (10YR 5/6) moist; massive; no root medium acid. Many feet thick. The upper, very friable part of the soil extends to a depth of 20 to 40 inches and ranges from dark grayish brown to dark yellowish brown. Some areas are up to 30 percent included soils that are similar to this soil material, but either shallower or deeper over the compact substratum; and some areas are 5 to 10 percent very gravelly Everett soils and sandy Indianola soils. This Arents, Alderwood soil iSL moderately well drained. Permeability in the upper, disturbed soil material is moderately rapid to moderately slow, depending on its compaction during construction. The substratum is very slowly permeable. 'Roots penetrate to and tend to mat on the surface of the consolidated substratum. Some roots enter the substratum through cracks. Water moves on top of the substratum in winter. Available water capacity is low. Runoff is slow, and the erosion hazard is slight. This soil is used for urban development. Ca- pability unit IVe-2; woodland group 3d2. Arents, Alderwood, material, 6 to i5 ercent sl es AmC is soil has convex slopes. Areas are rectangular in shape and range from 10 acres to about 450 acres in size. 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I \ 0 1 I- 1 I 1 SURVEY INFORMATION PROCEDURE / NARRATIVE A FIELD TRAVERSE USING A "SOKIA 3100" TOTAL STATION, AND "TRIMBLE RANGER" DATA COLLECTOR SUPPLEMENTED WITH FIELD NOTES WAS PERFORMED, ESTABLISHING THE ANGULAR, DISTANCE, AND VERTICAL RELATIONSHIPS BETWEEN THE MONUMENTS, PROPERTY LINES, AND TOPOGRAPHIC FEATURES AS SHOWN HEREON. A "LIETZ B-2A" AUTOMATIC LEVEL WAS USED TO CHECK AND ESTABLISH THE ELEVATION OF BENCHMARKS AND CONTROL POINTS. THE RESULTING DATA MEETS OR EXCEEDS THE STANDARDS FOR LAND BOUNDARY SURVEYS AS SET FORTH IN WAC 332--130-090. DATEs. OF suRVE�rs . FIELD SURVEYS BY BARGHAUSEN CONSULTING ENGINEERS, INC. CONDUCTED . NOVEMBER 2004. ALL MONUMENTS I SHOWN AS FOUND WERE VISITED AT THAT TIME. f HORIZVNTAL DATUM - BASIS OF BEARINGS THE` 'BEAP,ING OF THE LINE BETWEEN THE -FOUND. -MONUMENTS AT THE INT. OF__ 118th A' E. SE & SE 184th ST. (K.C. SURVEY CONTROL PT. 2887)(BCE PT. N0. 4) AND THQ INT. OF SE 192nd ST. & 116th AVE. SE (K.C. SURVEY CONTROL PT. 3831) (BCE PT, NO. 15) TAKEN AS N 02' 11'20" E. VERTICAL DATUM - BASIS OF ELEVATIONS NORTH AMERICAN VERTICAL DATUM OF 1988 --- NAVD 88 PROJECT BENCHMARK 0JG CO. SURVEY CONTROL POINT NO, 5789. (BCE NO. 13) TOP OF SURFACE BRASSY IN CONC. MONUMENT 7' IN. OF EDGE OF PVMT., N. SIDE OF SE 192nd ST.; 200'f E. OF INT. WITH 120th AVE. SE. ELEV. : 494.70 FEET NOTES 1. -UNDERGROUND UTILITIES AND FEATURES DEPICTED HEREON ARE BASED ON ;FIELD OBSERVATION, MARKINGS, DEVELOPMENT PLANS, AND/OR AVAILABLE ,RECORD DOCUMENTS ONLY. THE TRUE LOCATION, NATURE AND/OR EXISTENCE . OF BELOW GROUND FEATURES, DETECTED OR UNDETECTED, SHOULD BE VERIFIED. 2. ; FIRST AMERICAN TITLE INSURANCE COMPANY COMMITMENT NO. 4071601 ,(DATED NOVEMBER 10, 2004 AT 7:30 A.M.) WAS RELIED UPON FOR TITLE INFORMATION AND RESEARCH. PLEASE REFER TO THAT REPORT FOR FURTHER INFORMATION REGARDING FINANCIAL MATTERS BEYOND THE SCOPE OF THIS SURVEY. LEGAL' DESCRIPTION REAL PROPERTY IN THE UNINCORPORATED ARE OF COUNTY OF KING, STATE OF WASHINGTON, DESCRIBED AS FOLLOWS: PARCEL 'A: TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO, 5, ACCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WASHINGTON; - .. r-- _ � k EXCEPT THE WEST 150 FEET THEREOF, �AS MEASURED ALONG THE SOUTH LINE OF SAID TRACT 5. PARCEL �B: AN EASEMENT FOR INGRESS AND EGRESS OVER THE NORTH 3Q FEET OF THE WEST 150 FEET, AS MEASURED ALONG THE SOUTH LINE OF SAID TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO. 5, ACCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WASHINGTON. PARCEL ;C: THAT PORTION OF THE EAST HALF OF THE SOUTHEAST QUARTER OF THE SOUTHWEST QUARTER OF SECTION 33, TOWNSHIP 23 NORTH, RANGE 5 EAST, W.M., LYING EAST OF TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO. 5, ACCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WASHINGTON. TAX PARCEL NUMBER: 6199000101 AND 3323059010 . NOTE AN OIL AND GAS LEASE EXTENDS ACROSS A PORTION OF PARCEL C AS RECORDED UNDER RECORDING NOS, 8111160296, 8404240524, 8404250533, 8409170718, 8511130748, 8610130956 AND 8610130957. 1. SURVEYOR'S CERTIFICATE THE UNDERSIGNED HEREBY CERTIFIES TO TRINITY LAND DEVELOPMENT AS OF THE DATE HEREOF, THAT THIS SURVEY CORRECTLY DEPICTS THE CONDITIONS OF THIS SITE ON THE BASIS bF A FIELD SURVEY PERFORMED IN NOVEMBER, 2004, l DENNIS J. 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STORM DRAINAGE LINE P(4H) — POWER OVERHEAD --- X CHAINLINK FENCE ❑ HOG WIRE FENCE WOOD FENCE WETLAND DATA POINT w� w a NrETLAI�D FLAG No. I 1 of wP'� ON ONE Rio S FND REBAR/CAP PARCEL B EASEMENT 1w ' WATER EASEMENTN1NG�CN �20 2O� 1-� No • 3� 1 (TRA) REC. N0. 7803310029 25o SSA RE,C. IE 18' CMP SW-445.04 HIGH VOLTAGE POWER x ' � �� � TRANSMISSION TOWER x = I 1 C "� tk � cV p 1 f � Ao v- !j- # b' ry Rl (y � �-La � � � * y, �. � . 1 Ira , x40 w,�24 EHD ,�. 8' 9�2 E 50.71 x E ❑ po 0 0 i EDGE OF WATER �. 227.2 0 �-- --�. "' (SOOS CREEK) = � o ,� �'�n'- �-- .,�. FENCE s ,�, � � c.� ' +GATE 7 IE 12" CNC TEL RISER I TEL RISER W=474 68 " -P IE i M o O° 1 IE 12' ADS W=476.70 IE 12' ADS E=477.63 IE 12' CNC E=476.35 J FND REBAR/CAP W=176.03 IIIII NE 50.9 IE J_A I�PfEl8CP���IIIIIIIIIIlI I II I\ �EMEKT fCN �IMU�P�I ECHD1�3�0034�4'vI 11 �� �ili'll ' AIl"�. � � 1 k I I jx IWMAI W � IE NH 18'CNV E=O.I�IIII III C{ \\I\/I� I I I I I I I I I' I' � g I I I Ilow vxil l� 1 (OPEN HALF PIPE)I'' MowEBAR/CAPD; HIGH VOLTAGE �� IN 16 ol /ww w 18 Y/%iii�j/�� �' �������1 I I � � ��VAR '(Ins 1 / .�§I � � � 1 (l11 �i1 u�-�m��//lIll1/(I �a POST a T;� W 14V ui FND vz'rsaw1d� �j�IJI�IIII�II�IIIIIIIIII6�L�'�11�'\��\\\1'� \I � � \I I•'I� :t,�.�x w lov �/�� �ii I,� I I I � I z ��� � � °<�� � I I I I I I I I I I I I I I� I I � ��� �' � pIkWETLW IN 8 ll'1 i/ ` �.ERAND., cy X ) I ) ) ) 1 &3 o,/z' ������,.;>��; ti o- a"2a; ,� � � 1 � I � mos At ( I m����I1II1 111II�(IIIf I"f111,11���\���k���rx °� Fo -,/r IP I ____\ a II I f' I ±W cp SSAH GYJ378A5 I I x i 4 � - i i .SURVEY INFORMATION PROCEDU�E / NARRATIVE A FIELD TRAVERSE USING A "SOKIA 3100" TOTAL STATION, AND 'fiRIMBLE RANGER" DATA COLLE0,TOR SUPPLEMENTED WITH FIELD NOTES WAS PERFORMED, ESTABLISHING THE ANGU DISTANCE, AND VERTICAL RELATIONSHIPS BETWEEN THE MONUMENTS, PROPERTY L NES, AND TOPOGRAPHIC FEATURES AS SHOWN HEREON. A "LIETZ B-2A" AUTOMATIC iEVEL WAS USED TO CHECK AND ESTABLISH THE ELEVATION OF BENCHMARK AND CONTROL POINTS. THE RESULTING DATA MEETS OR EXCEEDS THE STANDARDS FOR LAND BOUNDARY SURVEYS AS SET FORTH IN WAC 332-130--090. 0 DATES O SURVEYS FIELD SURVEY S BY BARGHAUSEN CONSULTING ENGINEERS, INC. Cl CL CL CONDUCTED INOVEMBER 2004. y `r ALL MONUMENTS SHOWN AS FOUND WERE VISITED AT THAT TIME. I _y HORIZONTAL DATUM - BASIS OF BEARINGS � THE BEARIN� OF THE LINE BETWEEN THE FOUND MONUMENTS AT THE INT. OF >% 118th AVE. PE & SE 184th ST. (K.C. SURVEY CONTROL PT. 2887)(BCE PT. NO. 4) m AND THE INT. OF SE 192nd ST. & 116th AVE. SE (K.C. SURVEY CONTROL PT. 3831) (BCE PT. NO. 15) TAKEN AS N 02-11'20" E. ow VERTICAL DATUM - BASIS OF ELEVATIONS NORTH AME ICAN VERTICAL DATUM OF 1988 — NAVD 88 PROD CT BENCHMARK z Z KING 0. SURVEY CONTROL POINT N0. 5789. (BCE NO. 13) TOP 0 SURFACE BRASSY IN CONC. MONUMENT 7' N. OF EDGE OF PVMT., N. SIDE OF SE 192nd ST.; 200'f � E. OF INT. WITH 120th AVE. SE. ELEV. ■ 494.70 FEET NOTES 1. UNDERGROUND UTILITIES AND FEATURES DEPICTED HEREON ARE BASED ON FIELD OBSERVATION, MARKINGS, DEVELOPMENT PLANS, AND/OR AVAILABLE REgORD DOCUMENTS ONLY. THE TRUE LOCATION, NATURE AND/OR EXISTENCE OF ' BELOW GROUND FEATURES, DETECTED OR UNDETECTED, SHOULD BE VERIFIED. 2. FIRST AMERICAN TITLE INSURANCE COMPANY COMMITMENT NO. 4071601 (DATED NOVEMBER 10, 2004 AT 7:30 A.M.) WAS RELIED UPON FOR TITLE INFORMATION AND RESEARCH. PLEASE REFER TO THAT REPORT FOR FURTHER INFORMATION REGARDING FINANCIAL MATTERS BEYOND THE SCOPE OF THIS SURVEY. LEGAL D9SCRIPTION REAL PROPERTY IN THE UNINCORPORATED ARE OF COUNTY OF KING, STATE OF WASHINGTON, DESCRIBED AS FOLLOWS: PARCEL A. - TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO. 5, ACCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WASHINGTON; EXCEPT THE : WEST 150 FEET THEREOF, AS MEASURED ALONG THE SOUTH LINE OF SAID TRACT 5. PARCEL B: AN EASEMENt FOR INGRESS AND EGRESS OVER THE NORTH 30 FEET OF THE WEST 150 FEET, AS MEASURED ALONG THE SOUTH LINE OF SAID TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO. 5, PCCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WA�HINGTON. PARCEL C: THAT PORTION"OF THE EAST .HALF OF THE SOUTHEAST QUARTER OF THE SOUTHWEST QUARTER OF SECTION, 33, TOWNSHIP 23 NORTH, 'RANGE 5 EAST, W.M., LYING .EAST..,OF -TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. N0. 5, ACCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WASHINGTON. TAX PARCEL NUMBER: 6199000101 AND 3323059010 NOTE AN OIL AND GAS LEASE EXTENDS ACROSS A PORTION OF PARCEL C AS RECORDED UNDER RECORDING NOS. 8111160296, 8404240524, 8404250533, 8409170718, 85111307490 8610130956 AND 8610130957. ,i SURVEY , R'8 CERTIFICATE 1 THE UNDERSIGNED HEREBY CERTIFIES TO TRINITY LAND DEVELOPMENT AS OF THE DATE HEREOF T AT THIS SURVEY CORRECTLY DEPICTS THE CONDITIONS OF THIS SITE ON THE BASIS OF A FIELD SURVEY PERFORMED IN NOVEMBER, 2004. t4/3jo 4L DENNIS J. - SALTYS PLS fr WASHINGT?N RE TRATION N0. 27328 � DEC � 4 2004 U K.C, b.D.E.S. >— W M W cm r%. I-- 93L co Ix Q c4 uu J co m W W o I= > W 0 a z a CC) Z x J cm W 1 cvDj 0. m C ° `n v M it in Z � i I N 0 C C .Y U2 v CL © 0 U C O W Li O ) z� c r Q L L J ozz w,� LJ Q n N N LO N 00 ZQR �n m 00 N 00 Cr) CD CO W N I I Z w V) IL ! 0 Z f- N j N L Z— w o 00 Lj N q) E �0 x z W� � w � a copy h r W IV E m 0 0 � .Z _V ky� ■ I„ i ST........ �: ��.� .� �:::: ....................... DENSITY CALCULATIONS (PER KING COUNTY SUBDIVISION DENSITY AND DIMENSION CALCULATIONS WORKSHEEf) ZONING DESIGNATION R-4 GROSS HORIZONTAL AREA 315,829 S.F. = 7.25 AC. TOTAL SUBMERGED LANDS 0 S.F. PERIMETER RIGHTS -OF -WAY 0 S.F. SITE AREA 315,829 S.F. = 7.25 AC. (KCC.21 A.06.1172) ALLOWABLE DWELLING UNITS 44 LOTS (KCC.21 A.12.070) SENSITIVE AREAS (TRACT C) 81,103 S.F. DRAINAGE FACILITIES (TRACT 8) 34,517 S.F. REQUIRED RECREATION SPACE (35 LOTS x 390 S.F.) 13,650 S.F. NET BUILDABLE AREA 182,468 S.F. = 4.2 AC. (KCC.21A.06J97) MINIMUM URBAN RESIDENTIAL DENSITY (85%) -LOTS (KCC.2 iA.1 Z060) LOT AREA TABLE LOT # AREA (S.F.) LOT # AREA (S.F.) 1 6695 19 3600 2 4620 20 3600 3 4620 21 3600 4 4620 22 3600 5 4620 23 3600 6 4620 24 3600 7 4620 25 3600 8 4620 26 3600 9 4620 27 3600 10 4620 28 3600 11 4620 29 3600 12 4620 30 3600 13 4620 31 3600 14 4620 32 3600 15 4620 33 3600 16 4620 34 3600 17 5600 35 8750 18 4800 TOTAI. LOT AREA 152,745 SF 3.51 AC. RECREATION SPACE TABLE TRACT USE AREA (S.F.) A PARK 17,483 REQUIRED- (35 LETS O 390 SF/LOT) PROVIDED 3,650 AC. ?,483 AC. r TRACT TABLE p TRACT USE 12AREA (S.F.) A PARK �v, 17,483 B DRAINAGE FACILITIES i 35,615 C SENSITIVE AREA 2 81,103 TOTAL AREA 134201 SF 3.08 AC. LEGAL DESCRIPTION REAL PROPERTY IN THE UNINCORPORATED AREA OF COUNTY OF KING, STATE OF WASHINGTON, DESCRIBED AS FOLLOWS: PARCEL A: TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO. 5, ACCORDING TO.. THE P T RECORDED 11 VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WASHINGTON; EXCEPT THE WEST 150 FEET THEREOF, AS MEASURED ALONG THE SOUTH LINE OF SAID TRACT PARCEL 8: AN EASEMENT FOR INGRESS AND EGRESS OVER THE NORTH 30 FEET OF THE W ST 150 FEET AS MEASURED ALONG THE SOUTH LINE OF SAID TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO. 5, ACCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT P GE 90, IN KIN COUNTY, WASHINGTON. PARCEL C: THAT PORTION F THE EAST HALF OF THE SOUTHEAST UA 0 E T Q OF SECTION 33, TOWNSHIP 23 NORTH, RANGE 5 EAST, W.M., LYING EAST OF TRACT 5 OF NORTHWESTERN GARDEN TRACT DIV. NO. 5, ACCORDING TO THE PLAT RECORDED IN VOLUME 47 OF PLATS AT PAGE 90, IN KING COUNTY, WASHINGTON. TAX PARCEL NUMBER: 6199000101 AND 3323059010 NOTE: AN OIL AND GAS LEASE EXTENDS ACROSS. A PORTION OF PARCEL C AS RECORDED UNDER RECORDING NOS. 8111160296, 8404240524, 8404250533, 84091.707.18, 8511130748, 8610130956 AND 8610130957. PRELIMINARY PLAT tm-Z' WEHRMAN PROPERTY A PORTION OF THE SW 1/4 OF SECTION 33, TOWNSHIP 23 N., RANGE KING COUNTY, WASHINGTON 5 E., W.M. r p WET NO W 24 NO +, r x 3 3. - - i 227.2Q o `' 20' WAT R EASEMENT REC. NO. 7803310034 � ' L EX. INFORMAL PEDESTRIAN BRIDGE AIL TO BOULEVARD LANE PARK ( SURVEYED) N v oa b� y y woop ,ul -\Wa AND W 12 . > WETLAND W 11 op :v WETLAND W 8 �NFLAN D W �a ;s WETLAN D W 6 "It W 5 .i �• ' - �........ ,,.....- .,............,.... ' �, fir,; �lllti� •''�` 5. S ......-....-......,,,....,._.,...v................� w....,,..,,.......... ........ i } { o °J_+ t L x sWETLAN D a 13 4 O U N l SITE DATA 1. ASSESSOR'S PARCEL NOS.: 332305-9010, 619900-0101 2. GROSS SITE AREA: 315,829 S.F. (7.25 AC) 3. EXISTING USE: VACANT 4. PROPOSED USE: 35 LOT SINGLE FAMILY RESIDENTIAL SUBDIVISON 5. ZONING: R-6 (6 DU/ACRE) �'< 6. COMPREHENSIVE PLAN DESIGNATION: URM (URBAN RESIDENTIAL �J MEDIUM 4-12 DU/AC) l< 7. REQUIRED MINIMUM LOT WIDTH: 30 FEET 8. PROPOSED MINIMUM LOT WIDTH: 30 FEET �i 9. AVERAGE LOT AREA: 4364 S.F. l � 10. PROJECT DENSITY: 4.8 DU/AC el 1BUILDING SETBACKS: FR6NT (STREET): 10 FEET GARAGES: 20 FEET SIDE/REAR: 5 FEET SENSITIVE AREA BUFFERS: 15 FEET 12. BUILDING HEIGHT MAXIMUM: 35 FEET 13. SOURCE OF BOUNDARY AND TOPOGRAPHY: j FIELD VERIFIED BY BARGHAUSEN CONSULTING � ENGINEERS, INC. NOVEMBER, 2004 °-' UTILITIES/SERVICES: WATER/SEWER: SOOS CREEK WATER &SEWER DISTRICT 44616 S.E. 192ND STREET RENTON, WA 98058 (253) 630-9900 PUGET SOUND ENERGY 6905 SOUTH 228TH STREET KENT, WA 98032 1 (888) 225-5773 PHONE: QWEST COMMUNICATIONS 23315 - 667H AVENUE SOUTH KENT, WA 98032 1 (800) 244-1111 FIRE: .KING CO. FIRE DISTRICT # 40 10828 SE 176TH STREET RENTON, WA 98055 (425) 255-0931 SCHOOL' KENT SCHOOL DISTRICT N0. 415 12033 S.E. 256TH STREET KENT, WA 98031 (253) 852-9550 OWNER MARVIN WEHRMAN 5115 33RD AVENUE WEST EVERETT, WA 98203 DEVELOPER TRINITY LAND DEVELOPMENT 310 - 29TH STREET NE PUYALLUP, WA 98373 CONTACT: CHRIS AUSTIN ENGINEER/PLANNER/SURVEY BARGHAUSEN CONSULTING ENGINEERS, INC. 18215 72ND AVENUE SOUTH KENT, WA 98032 (425) 251-6222 {425) 251-8782 FAX CONTACTS: DANIEL K. BALMELLI/IVANA HALVORSENJDENNIS SALTYS 0. 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I I i \ I I } w I 7 I �,,.. \ I j I ) \ : i 3 I 7 % f j S 2 1 � N /N/� �y 4 r/ 4 ,�,,..,,,,.,. `' `'..,v••'"" m S Ir`' T" Fr^', I I `'-- I 1 �,``' , x s� s ',•.-k...., � S H O U LD E�. � � I I I ''`." f � � 1 2 f ` ; •..� ?\\, \ �i J r C � t � "1~ < N 6I1.i 0 w t- O '.. ti642--185[H NO ADD \ 1 I I I —1. I i •, �,•, � ? N � ;1 1 —116TH 11618-188TH 11626—N188TH \ .. I 11° 656-188IH'f 11$04-1 I 1 812-1 I '? I I SLOPE +I " # { '/ z ,.1 1ANCA5IER 1�U BOUDON `� 1 lr \ r . r t I F � o ' \ 1:. LANI Nam',, H�AN CHURCH SM M 8�� ,f,, 1 842-188TH 11852-188TH 18653-16ft } �\12004--188rM I , `� t ( I � 3 "y � , I 1 � � W W DITCH \ rJ F^EX. 4' G AVE I Hu►w GRAHAM Ly ��W.Y.v'` 1 } , H , PERRY \ TT'�C046—ii,8TH 1' A.8-188TH le \ ;F i ;,% w,-, z i i k F 6 � g"� W x''"\,, 1\it ^ :1 \'," f/ 1 "!" SH ULDE ` I f \\ •\ + •-. IAIV�I�IU IV1 r�^` � `" f r , .ry c r r t i i'` '*�► T".'" 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( I `�_\ i � I PA�CHECO )I I /� � �' � �,. �"^�x}���' �j���� it # 1 `1 �� A R)i 9 � Iegv � ;E. { r•„", ` % %ti f % ; r S �''\ ; f i ` r `�' { �,a E I I 1�� I i � (��./ ff ! i t t S 2 F 773 r t / o :J I \ t J,' •,....,...,.......... i S f ` r { ` ! } r t S C -C ,, i t f i { I. 11 \'\ '� ,,., w. a ,, r 1 O - I -.- \ ..._ , �\. - — \.\ , ra _\__ 1; k I+ f + i a • • 4 +r i 9 co % �\ } 3y I f ,.•µ.,, _,/ I ,,.•'`may f \;4 ~, Otw`� v }' ' J��.�•"..:.'ti•> i }`Y',_ 4 1 ''p `y `'�..x,.,.,,,,.,,,,t f } YS { f f } } ' , � •�� d-- `S l `,Y i t ,S `'•-",.�` fi'`O"'/ fY.r "` ) ~ i I \ \ t k` s C f , t 1. 11;. 11 fr \ 4 �, ti Y fL � SSr t iit 1 } I S. L � \\ 1 f`� I p e \, t ;{ -Fi 11 --"^�' s i O � 7� r••-- 6 la... . ._ _, , ,.. ., - .rr - 4 . - . - . il r 7 -.. .. ........ -.... -- .. .. . .. . ....," �, ... - _ ._ :.-...... .- .......- ... .... ,"mot.: -11'._ .+:. - .Li6.H...F.i+- __ �a ..i. �._. ,. .. -.. _. ., .-,. a -. ' �.. _. ..� --,:. .:.. .. � :.... .. .:. �:..:'..,.. .. � � .Ayy�y.- - .:�al.z+:- - r;��,;`h:.::ia EXISTING SCHOOL WALKING CONDITIONS EXHIBIT yet t�4 I G I ES S.E. 188TH STREET JS 12053 188TH VOLCKE R4,/ 1 1 1 /-%6m SHOULC- WEHRMANPROPERTY A PORTION OF THE SW 1/4 OF SECTION 33, TOWNSHIP 23 N., RANGE 5 E., W.M. KING COUNTY, WASHINGTON A f E 0 0 ') Z F5 0. 0 z a �a 0 LIL N C . U u) .N Rii Z 00 0 N 0 r X C C LJJ v o O � U� d a Q VLd = 0 V O �L a V) LLJ X C) s l< Z w j N �z N r0 N N O O N o0 ow z� Z on0 ui o _ w � «� w r d' N Z N N -mow a) a X Z u� �hW V x 00 �t- ,o 0 E z a°�i o 0 V ocq EXISTING SCHOOL WALKING CONDITIONS EXHIBIT } t s f MOMS AMMIN mot•'"' }i } w.... _........_.._....__........ �.. ,... �..... ... � . Yx `~ham♦ '^-..,........ ..... ,..----................_ ..........--.., '.t, \ 1. ...•-w. vim.,..-- y � 1 ,h~ .rw••....+. •\ I hh4u I � MATCH LINE SHEET 5 OF 5 18820'-.188TH n I I A l r-% M A k'J,-. FOR A PORTION OF THE SW 1/4 OF SECTION 33, TOWNSHIP 23 N., RANGE 5 E., W.M. KING COUNTY, WASHINGTON I ,• i f r 1 1,8611-120TH ! Via• •� I I I i • + k I d I t I 1 0 �M NIIpSrI e 4 ® o MM � j � .t 28' EX. I . ASPHALT � 1 j. � •; # } •I >r J I •I I i I �`1. ' DITCH €t EX. 5' SIDEWALK }{ r ! V.w...... 1923-186TH - .-,................... I A w �� • � A w� F I , �r �S �1 r M o � � t? I I `\ I � r� I I � I •�.`•. 3 • s �� I I , i z j S 4• t`t I EXISTING SCHOOL WALKING CONDITIONS EXHIBIT FOR A611 A PORTION OF THE SW 1/4 OF SECTION 33, TOWNSHIP 23 N., RANGE 5 E., W.M. 42 El, ASPHALT . ......... 8' PAVED SHOULDER -/I I i �,?..__.,.. f`�,� \�-4' PAVED SHOULDER, . ......... -1� aI - - - - — - - - - - - - - - - ---------------- -------------------------------- ---------------------------- --S.E. 188TH STREET -- !' `f` 18802-1 1 6TH LOPEZ NO ADDRESS "EX. 4' PAVED SHOULDERx. RAQUEL *FOG LINE KING COUNTY, WASHINGTON BOUDON 11641 —1 88TH YUN BUNLY i �x I k, --7 \ ........... . . ... . .... .......... . ......... . ........ . .. . ................ , • Y + w ....__ . .......... .... . .... . ........... h rF: r � � _. . .......................... - ............. - - -------. to 11856-116TH TRINITY � I I NO ADD 1 165 6 —18 w w im w Z em, 11 1804-188TH 11 1812-188TH �CHURCH I SMITH EX. 4' GRAVEL SHOULDER - - - - - - - - - - - - - - /NO DITCH 11651 —188TH PARAYI L ......... . .... ................ 11811 1)8 TH JOHNSO"N ,-4 C� Z 0 0 Q'- J LL m J = 0 x 0 W ri) z co 0 L: z CL CL < F— z 0 C) x w 6 Z U) 0 L4 It z 0 x c*4 ,v ol > cf) Li So 0 2: (n C) 0 ZD Z av 0 V) V) 0- x :D M Z z L<L- Z N z r) 0 N 00 00 CN � Z Cr) (D 00 Ld Ld z C%4 I I w z U-) Lo 5 C-D z z Lo Ld � N Z U-) N > 00 uJ E 0 V) 4� 0 otv, C Lu ...... . ...... ..... . ...... ....... . ....... co !E x 00 Lo 00 V) E z 0 C) 4-- CD CD Tmm -0 9� 0 'z i EXISTING SCHOOL WALKING CONDITIONS EXHIBIT 1. v 40' A PORTION OF THE SW 1/4 OF SECTION33, TOWNSHIP o zo w eo KING COUNTY, WASHINGTON F f I 1 I i I....y._..... ..�. ................ ° 24' EX. ASPHALT ___________________ ---------- t-------------------------- 450 I EX': 8' GRAVEL f SHOULDER 1 f I I ry of C'RAVFI CUnl 11 nE'D ' �r �i d w� t f� I , I ...... ...........� .,..�..... .., \ . , f I � � I MEMO rrrr 18425-1`27OTH-- -4 MORAN 23 N., RANGE-5 E., W.M. II ,' j r f 1 .1 I f tr ff � , --------------------- 20' EX. A P'4iALT �0 SE 184TH ____________________f_________________________________________ ______ ------------------ -, _-_-_---_---- _-_-----_------_-__----__-- of •. Fqf --___ __-_ __--_-_- JfJ----------------------------------------------- ......�4 x f — �� ,,,�•' �+_ .......:. "ten I EX. BUS STOP I' I FOR LINDBERG HIGH SCHOOL I I 12007--184TH ' GRONENTHAL I Il ,I ! I EX. 4' GRAVEL SHOULDER t NO DITCH I ' t 'I :I I 1! I I l' I i C z 32 0 •� NNNj UL iN— X 0 x 0 W m z !0 a z CL F- z 0 57< 0 w m a� 0 ❑ 1` P z vi I _ LA' •� r W 00 O f d- I ! \ N I CULVERT rfr CN Iol ji CL CL I N0 ai z�W ° N.z29 EXwVASPHALT o J E_n W Qwz Q_- JJ ! I I W f jj;i r 1 F Q Q Cr co o w CU 00 W Z o N I I W w o Q N z ' ...... , �' L0 r� Li Lo Lo N Z N N w E 00 W EX. 5 SIDEWALK - { <` c� fx• I 1 � l r_ _ 22P EX. ASPHALT! _186TH'sTRE TJ t 2 f l€ urrrrrrv..w `{ F i 00 tl w. 5� 28' EX. I ! , I� :' EX. 5'' SIDEWALK G X l 8611--120TH ASPHALT I J. I RATL I FF I V Emma �� >_ I MATCH LINE SHEET 3 F 5 � ' � �.� �.., � �� � " �� � � + +...I € �, I c + I I + I f E � }.. o CD s 0 L I .IJ 18431-12 SWANSTRO DITCH --� r f � - 11922-186TH WAGNER