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HomeMy WebLinkAboutLUA 09-099 & LUA-09-100_Report 01Web date: 06/29/2007 ti King County ENGINEERING REVIEW CHECKLIST 1998 Surface Water Design Manual 1993 King County Road Standards Department of Development and Environmental Services 900 Oakesdale Avenue Southwest Renton, WA. 98057-5212 206-296-6600 TTY 206-296-7217 For alternate formats, call 206-296-6600. PROJECT INFORMATION Project Name ~\~p\c,~ \ V'l"f::E-c-rCf\l.s. Activity Number 1,..~-z;5 ·a~ \~~~\Lt Project Number \..!:)z~\ \_C)o~CtL_:6.-_ v Development Number ---------------------------- ODES Review Engineer Notes OK Date D Hearing Examiner's Report ........ Date _______ Revised Report ...... Date D Plat Ordinance Number Date D Preliminary Plat Map .......... Date Approved by Hearing Examiner D Revised Preliminary Plat Map ....... Date Approved by DDES D 5-year Expiration ....... Date ----------(Show on engineering cover sheet) ROUTING TO OTHER KING COUNTY SECTIONS OK D Wetland Report / Plans Route Date ___________ _ Response Date ___________ _ D Geotechnical Report / Plans Route Date ------------ 0 Grading Report / Plans Route Date ------------ Response Date ------------ Response Date ___________ _ D Structural Designs/ Calculations/ Civil Plans/ Soils Report (Vaults, Retaining Walls, Bridges) Route Date Response Date ___________ _ D Landscape / Recreation / Street Tree / Plan Route Date ------------Response Date ------------ EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 06/29/2007 1 of 16 Activity Number: ------------- {Continued) D Traffic Improvement Plan / Report Route Date ____________ _ Response Date ____________ _ D Tree Retention / Forestry I Plan Route Date ____________ _ Response Date ____________ _ D Other Report/ Plan Route Date ____________ _ Response date ------------- D All required routing stations shown and updated on PRMS Notes GENERAL SUBDIVISION REQUIREMENTS D Site plan layout matches preliminary plat approved by Hearing Examiner (Check for same lot count, tract configuration, road alignments, etc.) D Compliance with conditions of preliminary approval D Compliance with Mitigated Determination of Non-Significance D Tract Table if three or more tracts. Identify name, size and purpose. D Show and label all SAO tracts, buffers, and 15' BSBL. D Review maximum height of 6-feet for rockeries and retaining walls per KCC 21A.12.030, 110-170, 220) Also show standard note per policy on Web site. D Use updated cover sheet showing designation for highly critical sites per Appendix, D44. D Determine if HPA fisheries permit required -contact CAO staff. D Tree Retention Plans -Show standard plan note (see section policies). SURFACE WATER DESIGN MANUAL (1998) CORE AND SPECIAL REQUIREMENTS OK SWDM D 1.2.1 D 1.2.2 D 1.2.3 D 1.2.6 D 1.2.8 D 1.3.1 D 1.3.2 Core #1 -Evaluate diversion of drainage within subbasins and/or tightline requirements for landslide hazard drainage areas. Core #2 -Off-site analysis. Evaluate adequacy and conclusions. Core #3 -Flow control. Determine design standard based upon mapping and/or off-site analysis. Evaluate exemptions from flow control if applicable. Core #6 -All drainage facilities and road access shall be located in public tracts, right-of-way and/or drainage easements dedicated to King County. For private facilities, specify the r_equired Declaration of Covenant and drainage easements for final recording. Core #8 -Water Quality. Determine design standard based upon mapping and/or off-site analysis. Evaluate exemptions if applicable and untreated areas per page 1-57. Special #1 -Area specific requirements. Perform P-suffix search on computer, evaluate grading code restrictions, and review for shared facility drainage plan. Special #2 -Floodplain boundaries shown on plans. EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 06/29/2007 2 of 16 Activity Number: ------------- DRAINAGE VARIANCES OK SWDM D 1.4 Activity No. _________ Approval Date Design lssue;,.s _____________________________ ~ TECHNICAL INFORMATION REPORT OK SWDM D 2.3.1.1 D D D D D D D D D D D D D D D D D D D D D D D D D D D D Section 1 -Project Overview Figure 1: TIR Worksheet Figure 2: Site Location Figure 3: Drainage Basins a. Acreage of subbasins b. Identify all site characteristics c. Show existing discharge points to and from the site d. Show routes of existing, construction, and future flows at all discharge points and downstream hydraulic structures. e. Use a minimum USGS 1 :2400 topographic map as a base f. Show and cite the length of travel from the farthest upstream end of a proposed storm system in the development to any proposed flow control facility. Figure 4: Soils a. Show the project site b. The area draining to the site c. The drainage system downstream for the distance of the downstream analysis Section 2 -Preliminary Conditions Summary with responses Section 3 -Off-Site Analysis Section 4 -Flow Control and Water Quality Facility Analysis and Design Existing Site Hydrology (Part A) Developed Site Hydrology (Part B) Performance Standards (Part C) Flow Control System (Part D) Water Quality System (Part E) Section 5 -Conveyance System Design and Analysis Section 6 -Special Reports and Studies -Geo, Wetlands, Floodplain analysis (4.4.2) Section 7 -Other Permits (HPA, Special Use, WSDOT, etc.) Section 8 -Erosion / Sedimentation Control Design Section 9 -Bond Quantities Worksheet and RID Facility Summary Section 10 -Maintenance and Operations Manual (Section 10 for privately maintained or special non-standard features EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 06/29/2007 3 of 16 Activity Number: ------------- SITE IMPROVEMENT PLANS OK SWDM D 2.3.1.2 D Vertical Datum NAVO 1988 -show benchmark D Horizontal Control NAO 1983/91 D 2.3.1.2 General Plan Format (1) Sheet size 24" x 36"; quality reproducibles (2) King Co. Standard Map Symbols; existing / proposed (Reference 7 A) (3) Project Information I Cover Sheet a. Title: Project name and ODES file number b. Table of Contents if more than 3 plan sheets c. Vicinity Map D D D D D D D d. Name & Phone of Utility field contacts and One Call Number: 1-800-424-5555 (water, sewer, D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D gas, power) e. Preconstruction / Inspection notification requirements f. Name & Phone of erosion control supervisor g. Name & Phone of Surveyor h. Name & Phone of Owner / Agent i. Name & Phone of Applicant j. Legal description k. Plan approval block for DOES I. Name & Phone of engineering firm preparing plans m. Fire Marshal's approval stamp (if required) n. Mailbox location approval by U.S. Postal Service o. List of conditions of preliminary approval on all site improvements (4) An overall site plan if more than three plan sheets are used a. The complete property area development b. Right-of-way information c. Street names and road classification d. All project phasing and proposed division boundaries e. All natural and proposed drainage collection and conveyance systems with catch basin numbers shown (5) Each sheet and TIR is stamped, signed, and dated by a Professional Engineer licensed in Washington State (6) Detail Sheets Provided (7) Title block on each sheet a. Development title b. Name, address and phone number of engineering firm c. Revision block d. Page numbering e. Sheet title (e.g., road and drainage, grading, etc.) (8) King County approval block on each plan sheet (9) The location and label for each section or other detail shall be provided (10) Critical Area Setbacks per K.C.C. 21A.24 (11) All match lines correspond to the sheet reference (12) Division phase lines with limits of construction (13) Standard Plan Notes -General, Drainage & Structural notes (Reference 78) (14) Survey control plan sheet stamped by licensed PLS in Washington State EngineeringReviewCheck1istFORM.doc le-ck.l..ercheck.pdf 06129/2007 4 of 16 Activity Number: -------------SITE IMPROVEMENT PLANS (contlnuodl OK SWDM D 2.3.1.2 Plan View: Site Plan and Roadway Elements (1) Property Lines, RMI lines, roadway widths shown D D (2) Existing/ Proposed road features; CL, edge pavement, edge shoulder, ditches, curb, sidewalk & D D D D D D access pts (3) Existing/ Proposed topographic contours@ 2', 5'>15% slope, 10-'>40% slope (4) All affected utilities are shown; utility poles marked (5) All roads and adjoining subdivisions identified (6) Existing / Proposed R/W dimensioned and shown (7) Existing / Proposed surfacing shown (8) Scale generally 1"=50' (1"=100' for lots >1 Acre) D 2.3.1.2 Plan View: Drainage Conveyance D D D D D D Sequentially number all catch basins and curb inlets Show length, diameter, and material for all pipes, culverts, and stubouts Label catch basin size and type Show stubout locations for roof drains Label all drainage easements, access easements, tracts, and building setbacks Provide flow arrows for drainage direction D 2.3.1.2 Plan View: Other D Show all buildings, property lines, streets, alleys, and easements D Verify condition of public right-of-way D Show structures on abutting properties within 50 feet D Identify fencing for drainage facilities D Provide section details of all retaining walls and rockeries D Show all wells on-site and within 100-feet of site. For well abandonment, include notes referencing DOE procedures. D 2.3.1.2 Profiles: Roadway and Drainage D D D D D D D D D D D Existing/ proposed roadway centerline (CL) at 50' stations increasing, reading from left to right. Show stationing of points of smooth vertical curve, with elevations Show vertical curve data including stopping sight distance Show all pipes and detention tanks with slope, length, size and type Show all pipe inverts and elevations of catch basins or lids Minimum cover dimensions if less than 2.0' Indicate roadway stationing and offset for all catchbasins Show vertical and horizontal scales (vertical 1 "=5') Label all profiles with street names and reference numbers to plan sheet Show all property boundaries and match line locations Provide profiles for conveyance systems of 12" and larger pipes or channels other than roadway ditches Catch basin lids are flush with ground line EngineeringReviewChecklistFORM.doc le-ck1-ercheck.pdf 06/29/2007 5 of 16 Activity Number: ------------- SITE IMPROVEMENT PLANS tcontlnuedl OK SWDM D 2.3.1.2 Plan Details D Provide scale drawing of each pond, vault, or water quality facility. Include all pipe details for size, type, slope, length, etc. D D Show existing and final grade contours at 2-foot intervals. Show maximum design water elevation. Dimension all berm widths D D D D D D D D D D 2.3.1.2 D Notes: Provide two cross sections through pond, including one section through restrictor , Specify soils and compaction requirements Show location and detail of emergency overflows, spillways, and bypasses Specify rock protection / energy dissipation details Provide inverts for all pipes, grates, etc., and spot elevations on pond bottom Show location of access roads to control manholes and pond / forebay bottoms Provide plan and section views of all energy dissipaters. Specify size and thickness of rock. Show bollard locations (Typically at entrance to drainage facility and walking trails) Restrictor and control structures must have section and plan view drawn to scale Structural Plan Details Verify that designer is a licensed structural P.E. for vaults or bridges EROSION AND SEDIMENT CONTROL (SWDM Appendix D) OK D D D D D D D D D D D D D D D D SWDM 2.3.1.3 D.4.1 General Specifications Separate plan sheet showing entire site w/features Show critical areas and buffers in separate tracts Show existing contours and final grades if scope or work includes grading Pertinent information from soils report is added to plans Drainage features identified (streams, wetlands, bogs, springs, seeps, swales, ditches, pipes & depressions) Utility corridors other than roads shown Show drainage divides and flow directions Specify best management practices Show cut and fill slopes with catch lines indicated Sufficient conceptual details to convey design intent Standard ESC plan notes shown on plans (Page D-69) For grading and structural fill within lot areas -show standard notes for geo hazards (see section policies for geo notes) Clearing Limits (1) Delineate clearing limits -colored survey tape may be used. Critical areas require plastic/ metal safety fence or stake and wire fences. (2) Provide detail of fencing EngineeringReviewChecktistFORM.doc le-ckl-ercheck.pdf 0612912007 6 of 16 Activity Number: ------------- 2.3.1.3 EROSION AND SEDIMENT CONTROL (SWDM Appendix DI lconllnuedl OK SWDM D D D D D D D D D D D D D D.4.2 D.4.3 D.4.4 D.4.5 Cover Measures (1) Specify the type and location of temporary and permanent cover measures. (Mulch, erosion control nets. blankets. plastic, seeding and sodding) (2) Specify the seed mixes, fertilizers and soil amendments to be used and application rates (3) Areas receiving special treatment are specified Oute netting, rock lining or sod) (4) Soil cover practices and locations of disturbed areas Perimeter Protection (1) Specify the location and type of perimeter protection to be used -silt fence, brush barriers, and/or vegetated strips (2) Provide details and specify type of fabric for silt fence Traffic Area Stabilization (1) Show construction entrance with detail (Figure D.4.G) (2) Show proposed construction roads and parking areas. Specify details for stabilization. Sediment Retention (1) Show location of sediment pond or sediment trap. Very small areas can be treated with only perimeter protection (see D.4.3). D · (2) Sediment Trap -Can be used for drainage areas of 3 acres or less. Calculate surface area using 2-year design storm. Show detail per Figure D.4.H. D (3) Sediment Pond -Determine pond geometry and show details on plan for required storage, depth, length and width D (4) Show sediment pond cross section and detail (Figures D.4.J and K) D (5) Provide details of cell dividers and stabilization techniques for inlet/ outlet D (6) Specify mulch or recommended cover of berms & slopes D (7) Specify the 1-foot marker for sediment removal D (8) Indicate catch basins for protection and show design details (Figures D.4.L and M) D D.4.6 Surface Water Control (1) Show conveyance of all surface water to a sediment pond or trap (2) Discharge location shall be downslope from disturbed areas (3) Show details for conveyance with interceptor dike, swales (Figures D.4.0, P). D D D D (4) For ditches, determine capacity for 10-year storm with 0.5 feet freeboard. Show details for check dams (Figure D.4.R). Determine check dam spacing and as needed, show inverts and minimum slopes of open channels. Also show direction of open channel flow. D D D (5) For pipe slope drains, determine capacity for 10-year storm. Show details per Figure D.4.Q. (6) Determine level of protection for outlet (rock pad, outfall design, or level spreader). See requirements in D-38 through D-40. (7) Evaluate off-site flows entering the site and assure bypass of disturbed areas EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 06/29/2007 7 of 16 Activity Number: ------------- 2.3.1.3 EROSION AND SEDIMENT CONTROL (SWDM Appendix Dl (continued\ OK SWDM D D D D D D D D D D D D D D D D D D D D D D D D D D.5.1 D.5.2 D.5.3 D.5.4 D.5.7 D.5.8 ESC Report (1) Show detailed construction sequence (page D-70) (2) All required calculations and soils reports contained in TIR Wet Season Requirements (1) Provide a list of all applicable wet season requirements (details on page D-42) Critical Area Restrictions (1) Consider phased construction during the dry season. See special recommendations on page D- 43. Maintenance (1) Plans shall list the name, address and phone number of the ESC Supervisor. A sign shall also be posted on the construction site with information for contacting the ESC supervisor. (2) Determine if site is Highly Critical (Soil Types C or D, 5 acres of disturbance, large areas with slopes >10%, proximity to streams, wetlands, or lakes) (3) On cover sheet of engineering plans, designate if highly critical site NPDES Requirements (1) Determine if project will disturb more than 5 acres (2) If disturbed area is greater the 5 acres, show the following note on the plans: "No construction or site disturbance for this project may begin before the applicant first obtains a General Permit to Discharge Stormwater Associated with Construction Activity permit from the Washington State Department of Ecology (DOE). For more information or application form, please visit DOE's website at http://www.ecy.wa.gov/biblio/ecy02085.html" Forest Practices Permit (1) Determine if project needs FPA permit. Contact DOES grading section. (2) Provide a reference note on the cover sheet indicating whether or not an FPA permit has been obtained. Early Start Plan Review (1) Standard cover sheet included with Title for Phased Early Start (2) List the scope of work for early start (scope of work will vary for each project -evaluate clearing, grading for roads, lot grading, utility installation, vault construction, off-site work) (3) Update the sheet index to identify all plans with updated page numbers (4) Include standard ESC plan prepared in accordance with all requirements listed above for erosion and sediment control (5) Include detailed construction sequence and identify ESC supervisor (6) Show standard erosion control notes (7) Show early start activity number on all plain sheets EngineeringReviewChecktistFORM.doc te-ckl-ercheck.pdf 06/29/2007 8 of 16 Activity Number: ____________ _ DESIGN REQUIREMENTS OK SWDM D D D D D D D D D D D D D D D D .D D D D D D D D D D D D D D D D D D D 3.2 3.27 3.3.6 3.3.7 4.0 4.5 4.7 4.9 4.9 4.10 4.27 4.35 4.51 4.69 4.53 5.0 5.3 5.9 5.11 Runoff Computation Rational Method required for on-site conveyance (See Table 3.2) KCRTS used for flow control design Evaluate correct data: Rainfall region, scale factor, time step, record type, acreages, soil cover groups, and percent impervious For urban areas, unprotected forest modeled as pasture or grass For rural areas, unprotected forest assumes 50% grass, 50% pasture All pre-developed grassland modeled as pasture All post developed grassland modeled as grass Impervious coverage calculated based upon specific project -clearly summarize types and amounts of impervious For urban development, impervious for each lot, >= 4,000 sq ft or maximum allowed in zoning code For rural development, impervious for each lot, >= 8,000 sq ft or maximum allowed in zoning code Evaluate requirements for modeling with effective impervious area Point of compliance -evaluate for on-site bypass and off-site closed depression On-site closed depressions and ponding areas Conveyance System Analysis and Design Conveyance systems are in easements with BSBLs Off-site easements must be recorded using standard forms (Reference SH) Determine which easements are public and private, label and dimension Pipes are parallel to and alongside property lines Minimum pipe size 12-inch, for private systems may allow 8 inch Easements for pipes outside of right of way For connecting pipes at structures, match crowns, 80% diameter, or inverts Minimum velocity at full flow 3.0 feet per second Minimum cover for pipes 2 feet Debris barrier for pipes 18-36 inch Outfall design criteria Surcharges (backwater analysis may be required) Maximum headwater allowed for culverts Bridge design Floodplain analysis Open channels Flow Control Design Mandatory requirements for roof downspouts in order of preference. Must evaluate feasibility of each. o Infiltration o Dispersion o Perforated stubouts Dispersion system criteria including vegetated flow path Perforated stub out, if used show detail per Fig. 5.1.3.A EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 0612912007 9 of 16 Activity Number: ------------- DESIGN REQUIREMENTS fcontlnuodl OK SWDM D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D 5.14 5.15 5.17 5.3 5.3.1 5.3.2 Forested open space flow control BMPs o Show tracts or easements for FOS o Show required notes on plan for plat recording Roadway dispersion BMPs, check design criteria BMPs for reducing facility size. Note: Facility sizing credit allowed for dispersion only if flowpath from roofs ultimately drain to RID facility. Detention Facilities Emergency overflow -Evaluate flow path for safe and adequate conveyance Setbacks Flow-through system Detention Ponds Dam Safety Compliance Two cross-sections through pond (one x-section to include control structure) Review pond details in Figures 5.3.1.A and B Designed as flow-through system Side slopes interior 3H:1V or fenced Vertical interior retaining walls Stamped by licensed structural civil engineer For pond walls, min. 25% of perimeter vegetated and no steeper than 3:1 Berms greater than 4 feet require key excavation Minimum berm width of 6 feet Primary overflow (control structure with riser). Secondary Inlet to the control structure Emergency Overflow Spillway, 100 year developed peak flow Soil and compaction requirements described (95% modified proctor) Access road min. turning radius, maximum grade, min. width, fences or gates Pond sign (Figure 5.3.1.D) Fencing and planting requirements Setbacks -5 feet from tow of exterior slope or 5 feet from water surface for cut slope Detention Tanks Flow-through system required 6" of dead storage in tank bottom Minimum pipe diameter of 36" Materials and structural stability Control structure per Section 5.3.4 Buoyancy Access risers and CB.s are spaced properly with max. depth from finished grade to tank invert shall be 20 feet and accessible by maintenance vehicles EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 0612912007 10 of 16 Activity Number: ------------- DESIGN REQUIREMENTS (contlnuedl OK SWDM D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D 5.3.3 5.3.4 5.4 6.0 6.1 6.2 6.2.2A 6.2.3 6.2.4 6.2.5 6.3 6.3.1 6.3.1.1 6.3.1 6.3.4 Detention Vaults Structural package submitted for approval Flow-through system required Review design details per Fig. 5.3.3.A. Note: Grate over sump with 2' x 2' hinged access door Access positioned a maximum of 50 feet from any location. (if over 3 foot cover use cone riser) Access required to inlet pipe and outlet Removable 5x1 O panel if vault greater than 1250 sq. ft. floor area Maximum depth from finished grade to vault invert to be 20 feet Minimum internal height shall be 7 feet. min. width shall be 4 feet min Ventilation pipes provided in all four corners Control Structures Section and plan view shown to scale Orifice siz.e and elevation on plans match calculations. Minimum orifice 0.5". (Note: Information Plate details are no longer required -see policy on Web site.) Infiltration Facilities Appropriate soils logs and testing procedures in TIR Pond bottom at least 3 feet above seasonal high water Permeable soil extends minimum 3 feet below bottom of pond Geotechnical report states suitability and determines design infiltration rate Overflow route identified with 100-yr overflow conveyance Spill Control device upstream of facility Presettling Review setback requirements, page 5-60. Design water surface setback of 20 feet from external tract, easement or property lines Show the standard note regarding public rule for in operation facility (see section policies) Water Quality Design Water Quality Menus Water Quality facilities Water Quality Sequencing Setbacks, slopes and embankments Facility Liners Flow Splitter Designs Biofiltration Facility Biofiltration swales and soil amendments Methods of Analysis Swale geometry, plantings, flow conveyance, high flows, velocity Road access requirements, page 6-43 Filter strip geometry (slopes) EngineeringReviewCheckllstFORM.doc le-ck:1-ercheck.pdf 06/29/2007 11 of 16 Activity Number: ------------- DESIGN REQUIREMENTS (continued) OK SWDM D D D D D D D D D D D D D D D D D D D D D D D D D D D D D Notes: 6.4 6.4.1.2 6.4.1.1 6.4.2 6.4.1.1 6.4.1.1 6.4.2.2 6.4.3 6.4.3.1 6.4.3.2 6.4.4 6.4.4.1 6.4.4.2 6.4.4.2 6.5 6.5.1 6.5.2 6.5.2.1 6.5.2.2 6.5.3 6.5.3.2 6.5.3.2 Wetpool Facility Designs Wetpool geometry, 2 cells, minimum depth of first cell 4 feet Flowpath length to width ratio 3: 1. Note: If flow path achieved with berms or walls, top of berm must be at 2-year water surface elevation. Berms, Baffles, Slopes lnleUOutlet Design Access, setbacks, and plantings Wetvaults Sizing basic or large Berms, Baffles, Slopes Two cells separated by wall or removable baffle Vault bottom forms a broad "V" with 5% sideslopes Inlet is submerged and outlet pipe designed for 100-year overflow Gravity drain provided if grade allows Minimum 50 square feet of grate over second cell Stormwater Wetlands Methods of Analysis Design Criteria -Wetland geometry, liners, access, plantings Combination Detention and Wetpool facilities Methods of Analysis Design Criteria -Detention and wetpool geometry, berms, baffles, slopes Access and plantings Media Filtration Facility Designs Presettling/pretreatment Sandfilters -Basic and Large Methods of analysis Design Criteria -Geometry, overflow/bypass, underdrain, and access Sandfllter Vaults Design Criteria -geometry, pretreatment, flow-spreading, energy dissipation Overflow/bypass, underdrain and access EngineeringReviewCheck1istFORM.doc le-ckt-ercheck.pdf 06/29/2007 12 of 16 Activity Number: ------------- KING COUNTY ROAD STANDARDS (1993) GENERAL REQUIREMENTS 1.03 A, B 1.03 D Off-site and frontage improvements determined by reviewing agency Note: For grading permits, the required extent of road improvements must be determined during engineering review. For subdivisions, the requirements are determined during preliminary review. Subdivisions must have recorded public access except for private roads DESIGN REQUIREMENTS 1.08 Road Variances Activity No. __________ Approval Date Design Issues ROAD CLASSIFICATION TABLE Name of Roadwav KCRS Classification OK KCRS D 2.03C Maximum Superelevation (2.05) D 2.03D Horizontal curvature (2.05) D 2.03E Maximum grade (2.11) D 2.03F Stopping Sight Distance (2.05, 2.12) D 2.03G Entering Sight Distance (2.05, 2.13) EngineeringReviewChecklistFORM.doc le·ckl-ercheck.pdf 06/2912007 13of16 Activity Number: ------------- KING COUNTY ROAD STANDARDS (1993) DESIGN REQUIREMENTS ccontlnuedl OK KCRS D 2.03H D 2.031 D 2.03J D 2.03J D 2.03K D 2.03L D 2.06 D 2.06B7 D 2.07 D 2.08A D 2.08B D 2.0BE D 2.0BF D 2.09 D 2.09B D 2.10A D 2.10A D 2.10A D 2.10B D 2.10C D 2.10E D 2.11A D 2.11 B D 2.12D D 2.16 D 2.18 D 2.20 D 3.01 D 3.01 D 3.02A D 3.026 D 3.05 Minimum pavement width (Note: Footnote 9 -Neighborhood collectors require 36-feet at approach to intersections with arterials) Minimum roadway width Minimum R/W width Min. R/Wwidth (Footnote 12 and 2.19B -include 1 foot extra ROW behind curb or sidewalk) Curb or shoulder type road (2.01) Minimum Half-Street width Private Street Design Standards Verify maximum potential of 16 lots Half Streets Minimum Cul-de-Sac diameters Maximum Cul-de-Sac length Maximum Cross Slope 6% Bulb island shall be offset 2-feet Alleys Private Access Tracts (Note: Must meet all standards for minor access street, except curb cut driveway design is allowed with property line radii dedication) Angle of intersection between 85 and 95 degrees Intersection curb radius Intersection right-of-way radius Intersection spacing Intersection landing Low Speed Curves Maximum Grade -Use AC for grades >12%, Use PCC for grades >20% Grade Brakes -maximum 1 % at intersections Intersection stopping sight distance (125' SSD allowed for local access streets) Bus zones -For arterials and neigh. collectors, the designer shall contact metro Intersections with State Highways Single access serving more than 100 lots Driveways Joint Use Driveways Sidewalks (both sides for subcollectors and higher classification) Location and width Handicapped access ramp (Use updated detail from KC Road Engineer, 3/26/04) EngineeringReviewCheck1istFORM.doc le-ckl-ercheck.pdf 06/29/2007 14 of 16 Activity Number: ------------- KING COUNTY ROAD STANDARDS (1993) DESIGN REQUIREMENTS (continued! OK D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D KCRS 3.09 3.10 3.11 4.01 4.01F 4.01F 4.02 4.02 4.03 4.05 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.11 6.00 7.02A-D 7.03A 7.03L 7.04A 7.04E 7.05A 7.05B 7.05E 8.02 8.03B School Access -asphalt walkway, sidewalk, or delineated shoulder Bikeways Equestrian Facilities Road Section and Surfacing (drawings 1-001 -1-006) Note: Neighborhood collectors require 3-inch asphalt concrete. Perform saw cut of pavement at fog line Pavement overlay for widening and channelization (show special note as approved by Development Engineer -see section policies) Residential street design Poor subgrade evaluation Arterial pavement design Pavement markings, channelization, and tapers (Requires DOT review) Rock facings (Dwg. Nos. 5-004 --5-007) Side slopes, generally 2H:1V Street trees and landscaping Mail boxes (Dwg. Nos. 5-01 O -5-012) Street illumination Survey Monuments to be disturbed are shown Roadway Barricades Bollards for walkways or maintenance roads Roadside obstacles (Note: If variance required for utility pole, the utility company must apply for the variance.) Bridges (minimum width 28-feet) Grass-lined, pipe or rock lined, special designed ditch Mi.nimum pipe size 12-inch diameter Beveled ends for culverts in ROW Maximum spacing between catch basins CBs taller than 5' (grate to invert) are Type II, Max. depth 12-feet per Dwg. 2-005 Vaned grates Through curb inlet frames for sag curves and intersections> 4%. Notes: a) Through curb inlet not used on rolled curb b) See section policies for policy on three fianking inlets All covers and grates shall be locking Utility pole locations and other obstacles Open cuts on existing roadways, patch requirements EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 0612912007 15of16 Activity Number: ------------- KING COUNTY ROAD STANDARDS (1993) DESIGN REQUIREMENTS fcontlnuodl Notes: Check out the DDES Web site at www.kinqcounty.gov/permits EngineeringReviewChecklistFORM.doc le-ckl-ercheck.pdf 06/29/2007 16 of 16 soc Page 1 of 16 http://www.metrokc.gov/mkcc/HearingExaminer/search/documents/L02P0005 RPT.doc (9 hits) April 5, 2007 OFFICE OF THE HEARING EXAMINER KING COUNTY, WASHINGTON 400 Yesler Way, Room 404 Seattle, Washington 98104 Telephone (206) 296-4660 Facsimile (206) 296-1654 Email: hearex@metrokc.gov REPORT AND DECISION SUBJECT: Department of Development and Environmental Services File No. tl'Q2,f()QQ$ Proposed Ordinance no. 2007-0010 EAST RENTON Preliminary Plat Application Location: West of 148th Avenue Southeast at approximately Southeast I 20th Street, Renton . Applicant: Cam West Real Estate Dev., Inc. represented by Robert Johns, Attorney Johns Monroe Mitsunaga 1601 -I 14th Ave. SE,# 110 Bellevue, Washington 98004 Telephone: ( 425) 467-9960 Facsimile: (425) 451-2818 King County: Department of Development and Environmental Services (DOES) represented by Karen Scharer 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 Telephone: (206) 296-7114 Facsimile: (206) 296-7051 SUMMARY OF RECOMMENDATIONS/DECISION: Department's Preliminary Recommendation: Approve subject to conditions Department's Final Recommendation: Approve subject to conditions (modified) Examiner's Decision: Approve subject to conditions (modified) EXAMINER PROCEEDINGS: Hearing Opened: March 22, 2007 Continued for Administrative Purposes: March 22, 2007 Hearing Closed: March 23, 2007 soc Page 2 of 16 The public hearing on the proposed subdivision of East Renton was conducted concurrently with the public hearing on the proposed subdivision ofRosemonte (ODES File No. L03POOl 8). Participants at the public hearing and the exhibits offered and entered are listed _in the attached minutes. At 12:3 I p.m. the hearing was continued for administrative purposes, to allow for the submission of proposed exh. no. 29, that would set forth the final recommendation of the department concerning revisions to recommended conditions #'s 6, 20, 21 and 22. Exhibit 29 was received by the Hearing Examiner on March 22, 2007, and the hearing was declared closed on March 23, 2007 A verbatim recording of the hearing is available in the office of the King County Hearing Examiner. ISSUES AND TOPICS ADDRESSED: • Future development tract• Recreation area • Red-tailed hawks nest• Wetland buffers • Safe walking conditions • Surface water drainage SUMMARY: The proposed subdivision of 17.01 acres into 66 lots in the urban area is approved subject to conditions. FINDINGS, CONCLUSIONS & DECISION: Having reviewed the record in this matter, the Examiner now makes and enters the following: FINDINGS: I. General Information: Developer: Camwest Real Estate Development, Inc. 9720 NE 120th Place, Suite I 00 Kirkland, WA 98034 Contact: Sars Slatten 425-825-1955 Engineer: Triad Associates 12112 ]15th Ave NE Kirkland, WA 98034 Contact: Gerry Buck 425-821-8448 STR: I 0-23-05 Location: West of 148th Ave SE at approximately SE120th St. Zoning: R-4 Acreage: 17 .0 I acres Number of Lots: 66 Parcel -I 023059023 Density: Approximately 3.9 units per acre Lot Size: Approximately 5,000 square feet in size Proposed Use: Single Family Detached Dwellings Sewage Disposal: City of Renton Water Supply: Water District# 90 Fire District: City of Renton soc Page 3 of 16 School District: Issaquah School District Complete Application Date: April 17, 2002 2. Except as modified herein, the facts set forth in the King County Land Use Services Division's preliminary report to the King County Hearing Examiner for the March 22, 2007, public hearing are found to be correct and are incorporated herein by this reference. The LUSD staff recommends approval of this subdivision, subject to conditions. 3. Development of this subdivision may affect, and lead to the abandonment of, a red-tailed hawks nest on the subject property. The red-trail hawk is not an endangered or threatened species, and no protection of the red-tail hawk is afforded by Jaw or the King County Code within the designated urban area of King County. 4. The applicant has proposed the establishment of Tract E as a "future development" tract. DOES determined that there is no reasonable access available to Tract E that would not cross wetland or wetland buffer. At the hearing the applicant abandoned its request to designate Tract E as a "future development" tract, and proposes to establish that tract as recreation area, to be connected by trail with the designated recreation/detention Tract G within this subdivision and adjacent to the proposed plat of Rosemonte. 5. The applicant has submitted a revised recreation plan for this subdivision and the adjacent plat of Rosemonte (exh. 26). This plan provides adequate area within Tracts C, G and E and within the proposed recreation tract and trail within Rosemonte to serve these plats jointly with well conceived amenities for recreation and open space, consistent with the requirements of the King County Code. To the extent that a portion of the recreation area necessary to meet the requirements for the plat ofRosemonte is located on the East Renton property, that can be corrected by boundary line adjustment or recording the two plats as a single plat, if DOES determines that it is necessary to do so. 6. Wetland buffers within this subdivision will need to be modified, utilizing the buffer averaging provisions of the critical areas code, to accommodate the proposed alignmentof 145th Avenue Southeast in the vicinity of the north property line, and adding buffer to mitigate the impacts of the proposed trail corridor within Tract F (between Tracts E and G), in accordance with the provisions ofKCC 21A.24.045.D.47.b. 7. The proposed subdivision will provide for safe walking conditions for students who will walk to Apollo Elementary School on southeast I 17th Street by constructing urban improvements to 148th Avenue Southeast from the plat to Southeast I 17th Street. A school crosswalk (crossing 148th Avenue Southeast) is located on the north side of Southeast I 17th Street, where an existing walkway is used by students to travel along the north side of Southeast 11 7th Street east from 148th Avenue Southeast to the school. This crosswalk also serves students walking from the area north of Southeast I 17th Street. Consequently, the crosswalk should be maintained on the north side of Southeast I 17th Street unless it is physically impractical to do so because of constraints resulting from the topography within the right-of- way for 148th Avenue Southeast, south of Southeast I 17th Street. If those constraints preclude extending curb, gutter and sidewalk from the plat of East Renton to the north side of Southeast I 17th Street, the crosswalk can be relocated to the south, and improvements made on the east side of 148th Avenue Southeast to Southeast I 17th Street. 8. The conceptual review of drainage plans has shown that there are no downstream impacts likely to occur from development of the subject property if Level I flow control and basic water quality treatment improvements are designed and constructed in accordance with the 1998 King County Drainage Manual. The final drainage plan will include calculations to assure that the capacity of drainage facilities and discharge rates will be consistent with those flow control standards. CONCLUSIONS: soc Page 4 of 16 I. If approved subject to the conditions recommended below, the proposed subdivision will comply with the goals and objectives of the King County Comprehensive Plan, subdivision and zoning codes, and other official land use controls and policies of King County. 2. If approved subject to the conditions recommended below, this proposed subdivision will make appropriate provision for the public health, safety and general welfare, and for open spaces, drainage ways, streets, other public ways, transit stops, potable water supply, sanitary waste, parks and recreation, playgrounds, schools and school grounds and safe walking conditions for students who only walk to school; and it will serve the public use and interest. 3. The conditions for final plat approval recommended below are in the public interest and are reasonable and proportionate requirements necessary to mitigate the impacts of the development upon the environment. 4. The dedications of land or easements within and adjacent to the proposed plat, as required for final plat approval or as shown on the proposed preliminary plat submitted by the Applicant on March 17, 2006 and the conceptual recreation plan submitted March 22, 2007 (exh. 26), are reasonable and necessary as a direct result of the development of this proposed plat, and are proportionate to the impacts of the development. 5. No provisions are required to be made by this subdivision for the protection of the red-tail hawks nest(s) on the site. 6. The proposed future development designation for Tract E has been withdrawn by the applicant, and that tract shall be a portion of the designated recreation area for the current development. 7. The proposed conceptual recreation plan submitted as exh. no. 26 is a reasonable and appropriate plan to serve the plats of East Renton and Rosemonte jointly. Minor alterations may be made in the final design and review by DOES, and boundary adjustments, if necessary, may be made to comply with provisions of KCC 21A.14.180-200. 8. Revisions to the wetland buffers will be necessary to comply with the provisions of the King County Critical Areas Code, to permit construction of 145th Avenue Southeast in the vicinity of the north property line and to mitigate the impacts of the trail connecting Tracts E and G. · 9. In order to provide for safe walking conditions for students walking from this development to Apollo Elementary School, urban improvements must be made to 148th Avenue Southeast north from the proposed plat to the north side of Southeast I 17th Street. These improvements should be made to the west side of 148th Avenue Southeast to the extent it is feasible to do so. In the event it is not practical to construct improvements extending to the existing crosswalk located at the north side of Southeast I 17th Street, a crosswalk may be established south of Southeast I 17th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast I 17th Street. I 0. Calculations for surface water detention facilities shall assure that the release of storm water from the site does not exceed the rates allowed by the 1998 King County Drainage Manual for achieving Level I flow control. DECISION: The proposed preliminary plat of East Renton, as revised and received on March 17, 2006, is approved, subject to the following conditions of final plat approval: soc Page 5 of 16 I. Compliance with all platting provisions of Title 19A of the King County Code. 2. All persons having an ownership interest in the subject property shall sign on the face of the final plat a dedication that includes the language set forth in King County Council Motion No. 5952. 3. The plat shall comply with the base density and minimum density requirements of the R-4 zone classification. All lots shall meet the minimum dimensional requirements of the R-4 zone classification or shall be as shown on the face of the approved preliminary plat, whichever is larger, except that minor revisions to the plat which do not result in substantial changes may be approved at the discretion of the Department of Development and Environment Services. Any/all plat boundary discrepancy(ies) shall be resolved to the satisfaction of DOES prior to the submittal of the final plat documents. As used in this condition, "discrepancy" is a boundary hiatus, an overlapping boundary or a physical appurtenance which indicates an encroachment, lines of possession or a conflict of title. 4. The applicant must obtain final approval from the King County Health Department. 5. All construction and upgrading of public and private roads shall be done in accordance with the King County Road Standards established and adopted by Ordinance No. 11187, as amended (1993 KCRS). (Also see conditions 8 and 24.) 6. The applicant must obtain the approval of the King County Fire Protection Engineer for the adequacy of the fire hydrant, water main, and fire flow standards of Chapter 17.08 of the King County Code. All future residences constructed within this subdivision are required to be sprinklered (NFPA 130) unless the requirement is removed by the King County fire Marshal or his/her designee. The Fire Code requires all portions of the exterior walls of structures to be within 150 feet (as a 11erson would walk via an a1111roved route around the building) from a minimum 20-foot wide, unobstructed driving surface. To qualify for removal of the sprinkler requirement, driving surfaces between curbs must be a minimum of28 feet in width when parking is allowed on one side of the roadway, and at least 36 feet in width when parking is permitted on both sides. The road width requirement applies to both on-site access and roads accessing the subdivision. 7. Final plat approval shall require full compliance with the drainage provisions set forth in King County Code 9.04. Compliance may result in reducing the number and/or location oflots as shown on the preliminary approved plat. Preliminary review has identified the following conditions of approval, which represent portions of the drainage requirements. All other applicable requirements in KCC 9.04 and the Surface Water Design Manual (SWDM) must also be satisfied during engineering and final review. a. Drainage plans and analysis shall comply with the 1998 King County Surface Water Design Manual. DOES approval of the drainage and roadway plans is required prior to any construction. b. Current standard plan notes and ESC notes, as established by DOES Engineering Review shall be shown on the engineering plans. c. The following note shall be shown on the final recorded plat: "All building downspouts, footing drains, and drains from all impervious surfaces such as patios soc Page 6 of 16 and driveways shall be connected to the permanent storm drain outlet as shown on the approved construction drawings# on file with DDES and/or the Department of Transportation. This plan shall be submitted with the application of any building permit. All connections of the drains must be constructed and approved prior to the final building inspection approval. For those lots that are designated for individual lot infiltration systems, the systems shall be constructed at the time of the building permit and shall comply with the plans on file." d. Storm water facilities shall be designed using the KCRTS level one flow control standard. Water quality facilities shall also be provided using the basic water quality protection menu. The size of the proposed drainage tracts may have to increase to accommodate the required detention volumes and water quality facilities. All runoff control facilities shall be located in a separate tract and dedicated to King County unless portions of the drainage tract are used for recreation space in accordance with KCC 21 A.14.180. e. The applicant has received approval for two drainage adjustment applications regarding designs for the discharge of storm water and a shared facility detention pond. The adjustment decisions are contained within file numbers L02V0089 and L04VOI03. During final review of the engineering plans, all applicable conditions of the adjustment approvals shall be satisfied including requirements for the shared facility located offsite within the plat of Rosemonte. f. As stated in the drainage adjustment decision, the offsite drainage pond shall be designed using the Level I flow control standard. Basic water quality standards are also required for design of the facility. If a wet pond facility is provided for water quality, the design shall comply with the 3: 1 flow length ratio as outlined on page 6-72 in the drainage manual. For evaluation of the onsite storm vault and the offsite detention pond, a soils report shall be prepared by a geotechnical engineer to evaluate the soils and groundwater conditions. g. For any proposed bypass of storm water from the flow control facility, the final drainage designs shall comply with applicable design requirements in the drainage manual as outlined on pages 1-36 and 3-52. h. As required by Special Requirement No. 2 in the drainage manual, the I 00-year floodplain boundaries for the onsite wetlands shall be shown on the final engineering plans and recorded plat. Access and Roads 8. The proposed subdivision shall comply with the 1993 King County Road Standards (KCRS) including the following requirements: a. During preliminary review the applicant submitted a road variance application (File No. L03V0049), regarding the crest vertical curve and substandard stopping sight distance along the plat frontage. In response to the variance application, the King County Road Engineer provided a decision letter dated October 20, 2004 which approved the variance based upon specific design criteria for constructing 148th Ave SE. As noted in the variance decision, the crest curve on 148th Ave SE must be reconstructed to provide 455 feet of stopping sight distance based upon design criteria with a 2-foot target. The final road improvements and design plans for the project shall demonstrate compliance with all applicable conditions of approval as stated in the variance decision. soc Page 7 of 16 b. 148th Avenue SE shall be improved along the frontage as an urban collector arterial including all design criteria from the road variance decision. In accordance with KCRS 2.02, the curb location shall be designed at 22-feet from the road crown to provide full width travel lanes and a bike lane. The preliminary design plans for East Renton shows road grading extending outside the right-of- way on the east side of 148th Ave SE. During final engineering review, the applicant shall acquire easements for any proposed construction on private property or provide an alternative design which is acceptable to King County for road construction within the existing right-of-way. c. The project entry road to 148th Ave SE shall be improved as an urban neighborhood collector. As shown on the preliminary plat, the required right-of-way width is 56 feet. d. The proposed roads within the subdivision shall be improved using urban design standards and in accordance with the street classifications shown on the preliminary plat map. e. Tract D shall be improved as a private joint use driveway serving a maximum of two lots. The lots served shall have undivided ownership of the tract and be responsible for its maintenance. As specified in KCRS 3.0IC, improvements shall include an 18 foot paved surface and a minimum tract width of20 feet. Drainage control shall include a curb or thickened edge on one side. f. Street trees shall be included in the design of all road improvements and shall comply with Section 5.03 of the KCRS. g. Street illumination shall be provided along the plat frontage and at intersections with arterials in accordance with KCRS 5.05. h. The proposed road improvements shall address the requirements for road surfacing outlined in KCRS Chapter 4. As noted in section 4.0lF, full width pavement overlay is required where widening existing asphalt, unless otherwise approved by King County. i. 148th Ave SE is classified as an arterial street which may require designs for bus zones and tum outs. As specified in KCRS 2.16, the designer shall contact Metro and the local school district to determine specific requirements. j. Modifications to the above road conditions may be considered by King County pursuant to the variance procedures in KCRS 1.08. 9. All utilities within proposed rights-of-way must be included within a franchise approved by the King County Council prior to final plat recording. 10. The site plans for East Renton show the northerly road stub for 145th Ave SE which may extend into the wetland buffer and associated setback within the Rosemont plat. During engineering review for East Renton, a revised road alignment and grading plan shall be provided which demonstrates that road construction within Rosemonte will comply with applicable sensitive area codes. The revised road design and grading plan may result in modification or loss of lots as shown on the preliminary plat. Alternatively, the applicant may seek approval to use buffer averaging as a means to revise the location of the buffer and BSLB to achieve code compliance within Rosemonte. 11. There shall be no direct vehicular access to or from 148th Ave SE from those lots which abut it. A note to this effect shall appear on the engineering plans and the final plat. soc Page 8 of 16 12. The applicant shall provide a safe walking access to Apollo Elementary School with urban improvements along the west side of 148th Ave NE to the existing crosswalk on the north side of SE 117th St. This improvement includes urban frontage improvements along property frontage of the Plat of East Renton, urban improvements along frontage of Rosemonte and urban improvements north to the existing crosswalk on the north side of SE 117'h ST. (It is noted that the adjoining plat of Rosemonte also will be subject to urban frontage requirements and urban improvements north to the existing crosswalk on the north side of SE 117'h ST.) In the event it is not practical to construct urban improvements on the west side of 148th Avenue Southeast extending to the existing crosswalk, a new crosswalk may be established south of Southeast I 17th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast I 17th Street. This alternative may use a graded surface on the east side of 148th Ave SE to ensure that school-age pedestrians are provided an acceptable-width walkway surface behind the curbing. The walkway shall be designed to the satisfaction of the school district and DOES. Mitigation/Impact Fees 13. The applicant or subsequent owner shall comply with King County Code 14.75, Mitigation Payment System (MPS), by paying the required MPS fee and administration fee as determined by the applicable fee ordinance. The applicant has the option to either: (I) pay the MPS fee at the final plat recording, or (2) pay the MPS fee at the time of building permit issuance. If the first option is chosen, the fee paid shall be the fee in effect at the time of plat application and a note shall be placed on the face of the plat that reads, "All fees required by King County Code 14.75, Mitigation Payment System (MPS), have been paid." If the second option is chosen, the fee paid shall be the amount in effect as of the date of building permit application. 14. Lots within this subdivision are subject to King County Code 2IA.43, which imposes impact fees to fund school system improvements needed to serve new development. As a condition of final approval, fifty percent (50%) of the impact fees due for the plat shall be assessed and collected immediately prior to the recording, using the fee schedules in effect when the plat receives final approval. The balance of the assessed fee shall be allocated evenly to the dwelling units in the plat and shall be collected prior to building permit issuance. Wetlands 15. Preliminary plat review has identified specific requirements which apply to this project as listed below. All other applicable requirements from K.C.C. 21A.24 shall also be addressed by the applicant. a. The Class 2 wetland shall have a minimum SO-foot buffer of undisturbed vegetation as measured from the wetlan.d edge. b. Sensitive area tract(s) shall be used to delineate and protect sensitive areas and buffers in development proposals for subdivisions and shall be recorded on all documents of title of record for all affected lots. c. Buffer width averaging may be allowed by King County if it will provide additional protection to the soc Page 9 of 16 wetland/stream or enhance their functions, as long as the total area contained in the buffer on the development proposal site does not decrease. In no area shall the buffer be less than 65 percent of the required minimum distance. To ensure such functions are enhanced a mitigation plan will be required for the remaining on-site sensitive areas. An enhancement plan shall be submitted for review during engineering review. d. A 15-foot BSBL shall be established from the edge of buffer and/or the sensitive areas Tract(s) and shown on all affected lots. e. To ensure long term protection of the Sensitive Areas a split-railed fence ofno more than 4 feet in height shall be installed along the Sensitive Area Tract boundaries in the area of proposed lots. Sensitive Area signs shall be attached to the fence at no less than I 00 foot intervals. f. If alterations of streams and/or wetlands are approved in co~formance with K.C.C. 21 A.24, then a detailed plan to mitigate for impacts from that alteration will be required to be reviewed and approved along with the plat engineering plans. A performance bond or other financial guarantee will be required at the time of plan approval to guarantee that the mitigation measures are installed according to the plan. Once the mitigation work is completed to a DOES Senior Ecologist's satisfaction, the performance bond may be replaced by a maintenance bond for the remainder of the five-year monitoring period to guarantee the success of the mitigation. The applicant shall be responsible for the installation, maintenance and monitoring of any approved mitigation. The mitigation plan must be installed prior to final inspection of the plat. g. Prior to commencing construction activities on the site, the applicant shall temporarily mark sensitive areas tract(s) in a highly visible manner, and these areas must remain so marked until all development proposal activities in the vicinity of the sensitive areas are completed. h. During engineering plan review the applicant shall provide a wetland hydrology analysis to demonstrate how the wetland hydrology will be maintained post-construction. i. Detention out-fall structures maybe permitted within the wetland/stream buffers, however, structures shall be located in the outer edge of the buffer, if possible. All buffer impacts sl)all be mitigated. 11. Development authorized by this approval may require other state and/or federal permits or approvals. It is the applicant's responsibility to correspond with these agencies prior to beginning work on the site. 12. During engineering review, the plan set shall be routed to the sensitive areas group to determine if the above conditions have been met.' Geotcchnical 13. The applicant shall delineate all on-site erosion hazard areas on the final engineering plans (erosion hazard areas are defined in KCC 21A.06.415). The delineation of such areas shall be approved by a DOES geologist. The requirements found in KCC 2 lA.24.220 concerning erosion hazard areas shall be met, including seasonal restrictions on clearing and grading activities. Sensitive Area soc Page JO of 16 14. The following note shall be shown on the final engineering plan and recorded plat: Other RESTRICTIONS FOR SENSITIVE AREA TRACTS AND SENSITIVE AREAS AND BUFFERS Dedication of a sensitive area tract/sensitive area and buffer conveys to the public a beneficial interest in the land within the tract/sensitive area and buffer. This interest includes the preservation of native vegetation for all purposes that benefit the public health, safety and welfare, including control of surface water and erosion, maintenance of slope stability, and protection of plant and animal habitat. The sensitive area tract/sensitive area and buffer imposes upon all present and future owners and occupiers of the land subject to the tract/sensitive area and buffer the obligation, enforceable on behalf of the public by King County, to leave undisturbed all trees and other vegetation within the tract/sensitive area and buffer. The vegetation within the tract/sensitive area and buffer may not be cut, pruned, covered by fill, removed or damaged without approval in writing from the King County Department of Development and Environmental Services or its successor agency, unless otherwise provided by law. The common boundary between the tract/sensitive area and buffer and the area of development activity must be marked or otherwise flagged to the satisfaction of King County prior to any clearing, grading, building construction or other development activity on a lot subject to the sensitive area tract/sensitive area and buffer. The required marking or flagging shall remain in place until all development proposal activities in the vicinity of the sensitive area are completed. No building foundations are allowed beyond the required 15-foot building setback line, unless otherwise provided by law. 15. The plat design shall be revised to provide the minimum suitable recreation space consistent with the requirements of K.C.C. 2 lA.14.180 and K.C.C. 21A. 14.190 (i.e., minimum area, as well as, sport court [s], children's play equipment, picnic table[s], benches, etc.), as shown on hearing exh. no. 26. a. A detailed recreation space plan (i.e., location, area calculations, dimensions, landscape specs, equipment specs, etc.) shall be submitted for review and approval by DOES prior to or concurrent with the submittal of engineering plats. b. A performance bond for recreation space improvements shall be posted prior to recording of the plat. 16. Tract E shall be designated for recreational area, with an approved trail (across wetland buffers) extending from the recreational Tract G and functioning as an extension of recreation from Tract G. Plans for the tract -designation and design, shall comply with codes and shall be to the satisfaction of ODES prior to engineering approval. 17. A homeowners' association or other workable organization shall be established to the satisfaction of DOES which provides for the ownership and continued maintenance of the recreation, open space and/or sensitive area tract(s) which combines usage of recreation area within L03POO 18, the plat of Rosemonte, pursuant to hearing exh. no. 26. (See condition no. 25.) 18. Street trees shall be provided as follows (per KCRS 5.03 and K.C.C. 21 A.16.050): a. Trees shall be planted at a rate of one tree for every 40 feet of frontage along all roads. Spacing may be modified to accommodate sight distance requirements for driveways and intersections. soc Page 11 of 16 b. Trees shall be located within the street right-of-way and planted in accordance with Drawing No. 5-009 of the 1993 King County Road Standards, unless King County Department of Transportation determines that trees should not be located in the street right-of-way. c. If King County determines that the required street trees should not be located within the right-of-way, they shall be located no more than 20 feet from the street right-of-way line. d. The trees shall be owned and maintained by the abutting lot owners or the homeowners association or other workable organization unless the county has adopted a maintenance program. Ownership and maintenance shall be noted on the face of the final recorded plat. e. The species of trees shall be approved by ODES if located within the right-of-way, and shall not include poplar, cottonwood, soft maples, gum, any fruit-bearing trees, or any other tree or shrub whose roots are likely to obstruct sanitary or storm sewers, or that is not compatible with overhead utility lines. f. The applicant shall submit a street tree plan and bond quantity sheet for review and approval by DOES prior to engineering plan approval. g. The applicant shall contact Metro Service Planning at (206) 684-1622 to determine if I 48th Ave SE is on a bus route. If I 48th Ave SE is a bus route, the street tree plan shall also be reviewed by Metro. h. The street trees must be installed and inspected, or a performance bond posted prior to recording of the plat. If a performance bond is posted, the street trees must be installed and inspected within one year of recording of the plat. At the time of inspection, if the trees are found to be installed per the approved plan, a maintenance bond must be submitted or the performance bond replaced with a maintenance bond, and held for one year. After one year, the maintenance bond may be released after ODES has completed a second inspection and determined that the trees have been kept healthy and thriving. 1. A landscape inspection fee shall also be submitted prior to plat recording. The inspection fee is subject to change based on the current county fees. SEPA 11. The following have been established by SEPA as necessary requirements to mitigate the adverse environmental impacts of this development. The applicants shall demonstrate compliance with these items prior to final approval. (I.) To mitigate the significant adverse impact the plat of East Renton will have on the intersections of SR 9001148th Ave SE and SR 9001164th Ave SE, the applicant shall install, either individually or in conjunction with other development projects in this area, the following improvements at the SR 9001148th Ave intersection: • A traffic signal, and • Eastbound and westbound left tum lanes The design for the SR 9001148th Ave intersection improvements shall be approved by the Washington State Department of Transportation (and by King County to the extent such improvements are located in County right-of-way). In addition, at a minimum, the existing entering sight distance looking east for the soc Page 12 of 16 north and south legs of the intersection (602 feet and 386 feet, respectively) shall not be reduced as part of the intersection improvements. Documentation shall be submitted to show this requirement is met. All construction work associated with the intersection improvements shall be completed between April I s.t and September 30th_ This seasonal restriction shall be clearly shown on the final engineering plans. In lieu of the installation of the above-noted intersection improvements prior to final plat approval, the applicant may post a financial guarantee with WSDOT which assures the installation of these improvements within two years of the recording of East Renton. In this event, intersection improvement design must be approved by WSDOT prior to King County approval of the engineering plans for East Renton. If the above-noted intersection improvements have already been made by others prior to the recording of East Renton, or a financial guarantee has been posted by others which assures the installation of these improvements, then the applicant for East Renton shall pay a pro-rata share dollar amount to the developer who has made the improvements or "bonded" for the improvements, in an amount proportional to the impacts of East Renton. The pro-rata share dollar amount to be paid shall be set by WSDOT, and documentation shall be provided by the East Renton applicant to the King County Land Use Services Division to show this payment has been made, prior to final plat recording. The pro-rata dollar amount to be paid shall be based on the following: • The final East Renton lot count • The trip distribution for East Renton • The total trips contributed to the intersection of SR 900.148th Ave by the plats of Aster Park (LOOP0024), Stone Ridge 9L99P3008), East Renton (L02P0005), Shamrock (L02P0014), Rosemonte (aka lronwood- L03P0018), Martin (L05P0019) and any future land use applications submitted to King County for which compliance with the King County Intersection Standards (KCC 14.80) is required at either the SR 9001148th Ave intersection, or the SR 9001164th Ave High Accident Location. In the event that either King County or WSDOT adopts a formal "latecomer's" system prior to final plat recording, that system may be followed in lieu of the approach described above, at the discretion of the applicant, as long as at a minimum there is a financial guarantee which assures the above-noted intersection improvements will be installed within two years of the date ofrecording of the plat of East Renton. [Comprehensive Plan Policy T-303 and King County Code 21 A.28.060A] (2.) Documentation shall be provided to demonstrate to the satisfaction ofWSDOT that stopping sight distance (360 feet) is available on the east leg of the SR 9001148th Ave intersection. The intersection shall be modified by the applicant, if necessary, so that this stopping sight distance requirement is met on the east leg. In addition, the applicant shall clear vegetation within the right-of-way along SR 900, e~st of 148th Ave., to maximize the entering sight distance for the north and south legs of the intersection. [Comprehensive Plan Policy T-303 and King County Comprehensive Policy T-303 and King County Code 2 IA.28.060A] 25. The recreation area may serve the adjacent plat ofRosemonte. If necessary, boundary line adjustments may be approved to establish a portion of the East Renton plat recreation area as a part of the Rosemonte Plat, or the two plats may be recorded as a single plat. 26. Wetland buffer averaging or additional buffer are required to compensate for reduction of wetland buffers adjacent to 145th Avenue southeast, as proposed in the vicinity of the north property line, and to compensate for construction of the recreation tract trail through wetland buffer between Tracts E and G. ORDERED this 5th day of April, 2007. soc James N. O'Connor King County Hearing Examiner pro tern TRANSMITIED this 5th day of April, 2007, to the parties and interested persons of record: Robert L. Anderson Cam West Devel., Inc. Kristine & Keith Childs PO Box 353 Attn: Sara Slatten 12004 -148th Ave. SE Maple Valley WA 98038 9720 NE 120th Pl. #100 Renton WA 98059 Kirkland WA 98034 Claudia Donnelly Renee & Mark Engbaum John Graves 10415 -147th Ave. SE 5424 NE 10th St. Lozier Homes Renton WA 98059 Renton WA 98059-4386 1203 114th Ave. SE Bellevue WA 98004 Ralph Hickman Robert D. Johns Rebecca Lind 9720 NE !20th Pl. #JOO Johns Monroe Mitsunaga City of Renton, EDNSP Kirkland WA 98034 1601 -I 14th Ave. SE,# 110 1055 S. Grady Way Bellevue WA 98004 Renton WA 98057 Seattle KC Health Dept. Triad Associates Kim Claussen E. Dist. Environ. Health 12112 -I 15th Ave NE DDES/LUSD 14350 SE Eastgate Way Kirkland WA 98034 MS OAK-DE-0100 Bellevue WA 98007 Lisa Dinsmore Peter Dye Nick Gillen DDES/LUSD DDES/LUSD DDES/LUSD MS OAK-DE-0100 MS OAK-DE-0100 MS OAK-DE-0100 Shirley Goll Kristen Langley Karen Scharer DDES/LUSD DDES/LUSD DDES/LUSD MS OAK-DE-0100 MS OAK-DE-0100 MS OAK-DE-0100 Steve Townsend Larry West Kelly Whiting DDES/LUSD DDES/LUSD KC DOT, Rd. Srvcs. Div. MS. OAK-DE-0100 MS OAK-DE-0100 MS KSC-TR-0231 Page 13 of 16 soc Page 14 of 16 Bruce Whittaker DDES/LUSD MS OAK-DE-0100 NOTICE OF RIGHT TO APPEAL In order to appeal the decision of the Examiner, written notice of appeal must be filed with the Clerk of the King County Council with a fee of $250.00 (check payable to King County Office of Finance) on or before April 19, 2007. If a notice of appeal is filed, the original and six (6) copies of a written appeal statement specifying the basis for the appeal and argument in support of the appeal must be filed with the Clerk of the King County Council on or before April 26, 2007. Appeal statements may refer only to facts contained in the hearing record; new facts may not be presented on appeal. Filing requires actual delivery to the Office of the Clerk of the Council, Room I 025, King County Courthouse, 516 /d Avenue, Seattle, Washington 98104, prior to the close of business (4:30 p.m.) on the date due. Prior mailing is not sufficient if actual receipt by the Clerk does not occur within the applicable time period. The Examiner does not have authority to extend the time period unless the Office of the Clerk is not open on the specified closing date, in which event delivery prior to the close of business on the next business day is sufficient to meet the filing requirement. If a written notice of appeal and filing fee are not filed within fourteen (14) calendar days of the date of this report, or if a written appeal statement and argument are not filed within twenty-one (21) calendar days of the date of this report, the decision of the hearing examiner contained herein shall be the final decision of King County without the need for further action by the Council. MINUTES OF THE MARCH 22, 2007, PUBLIC HEARING ON DEPARTMENT OF DEVELOPMENT AND ENVIRONMENTAL SERVICES FILE NO. UOZP§{iO~ James N. O'Connor was the Hearing Examiner in this matter. Participating in the hearing were Karen Scharer, Pete Dye and Kristen Langley, representing the Department; Robert Johns representing the Applicant; and Renee Engbaum. Exhibit No. I DOES file L02!;0.Q.O~ Exhibit No. 2 DDES preliminary report for l]i°2'R0005, prepared 12/29/2006 with attachments as follow: 2.1. Plat Map w/66 Lot Plat Design 2.2. City of Renton Sewer Availability 2.3. Road Variance/L03V0049 2.4. Surface Water Management Variance/L02V0089 2.5 Surface Water Management Variance/L04VOI 03 2.6. Density Calculations w/R-4 zoning 2. 7 Recreation cross section for Tract G (previously labeled Tract C) Exhibit No. 3 Application for land use permit no. AO I P007 l received 4/3/2002 soc Page 15 of 16 Exhibit No. 4 Environmental checklist received 4/3/2002 Exhibit No. 5 Revised SEPA Mitigated Determination ofNonsignificance, date ofrevised issuance: 12/29/2006 Exhibit No. 6 Affidavit of posting of Notice of Application indicating posting date of 5/3/2002, received by ODES on 5/3/2002 Exhibit No. 7 Revised Site plan (66 lot preliminary plat map) received 3/17/2006 Exhibit No. 8 Assessor's maps (2) SE 10-23-05 & SW 11-23-05 Exhibit No. 9 Revised Level I Downstream Analysis by Triad & Associates, received I 1/24/2004 Exhibit No. IO Traffic Impact Analysis by Gary Struthers Associates received 4/3/2002 Exhibit No. 11 Request for School Information form from the Issaquah School District, received 4/25/2002 Exhibit No. 12 King County Certificate of Water Availability, received 4/03/2002 Exhibit No. 13 Vicinity Map for L05P0019, L03POOl 8 & !!&?Ji'.Q9~91, prepared by KC staff on 3/19/2007 Exhibit No. 14 DOES Field Report and GIS Information dated 5/1/2002 Exhibit No. 15 Revised Wetlands Determination and Habitat analysis by C. Gary Schulz dated 9/12/2002 Exhibit No. 16 Watertype/stream Classification Survey comments from Washington Trout, dated I 0/15/2004 Exhibit No. 17 Drainage outfall report by Associated Earth Sciences, Inc., dated 9/24/2002 Exhibit No. 18 Boundary line adjustment proposal with attached map, dated 5/3/2004 Exhibit No. 19 Not entered Exhibit No. 20 Response to East Renton Transportation Comments by Gary Struthers Associates, Inc., dated 1/23/2003 Exhibit No. 21 Washington State Department ofTranportation comments regarding Traffic Impact An~lysis, dated 11/13/2002 Exhibit No. 22 Letter from Claudia Donnelly dated 6/13/2003 regarding basin plan, with 2 attachments Exhibit No. 23 Note from Claudia Donnelly with attached copy of 11/12/03 newspaper article regarding transportation model Exhibit No. 24 City of Renton comments, regarding sewer service, dated 3/28/2002 Exhibit No. 25 Revised language for Condition 6 Exhibit No. 26 Conceptual recreation plan by Triad Associates Exhibit No. 27 Revised preliminary plat received March 22, 2007 Exhibit No. 28 Letter from Renee and Mark Engbaum dated March 22, 2007, with attached map indicating the location of their property Exhibit No. 29 Revisions to Conditions 20, 21 and 22 JNOC:gao L02~-0005 RPT L02POQO~East Renton soc Page 16 of 16 Document Properties Title: East Renton Su~j~~: . ~relimin~ry Plat Application Author: ! O'Conn?.~. _ . Keywords: 1 Future development tract, Red-tailed hawks nest, Safe walking conditions, Recreation area, Wetland buffers, Surface water drainage Comments: Approve, subject to revised conditions Template: Normal.dot Last saved by: Ohrmundt, Ginger Revision number: 2 Application: Microsoft Word 10.0 Total editing time: 00:00:00 Last printed: 2007/04/05 21:17:00 Created: 2007/04/05 22:28:00 Last saved: 2007/04/05 22:28:00 category: April 2007 Manager: (Q2RPOOS Company: DDES dtSearch 7.30 (7320) soc Page I of 16 http://www.metrokc.gov/mkcc/HearingExaminer/search/documents/L03P0018 RPT.doc (7 hits) April 10, 2007 OFFICE OF THE HEARING EXAMINER KING COUNTY, WASHINGTON 400 Yesler Way, Room 404 Seattle, Washington 98 l 04 Telephone (206) 296-4660 Facsimile (206) 296-1654 Email: hearex@metrokc.gov REPORT AND DECISION SUBJECT: Department of Development and Environmental Services File No. L03P0018 Proposed Ordinance no. 2007-0011 ROSEMONTE Preliminary Plat Application Location: West of 148th Avenue Southeast at approximately Southeast 117th Street, Renton Applicant: Cam West Real Estate Dev., Inc. represented by Robert Johns, Attorney Johns Monroe Mitsunaga 1601 -114th Ave. SE,# 110 Bellevue, Washington 98004 Telephone: ( 425) 467-9960 , Facsimile: (425) 451-2818 King County: Department of Development and Environmental Services (DOES) represented by Karen Scharer 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 Telephone: (206) 296-7114 Facsimile: (206) 296-7051 SUMMARY OF RECOMMENDATIONS/DECISION: Department's Preliminary Recommendation: Approve subject to conditions Department's Final Recommendation: Approve subject to conditions (modified) Examiner's Decision: Approve subject to conditions (modified) EXAMINER PROCEEDINGS: Hearing Opened: March 22, 2007 Continued for Administrative Purposes: March 22, 2007 Hearing Closed: March 23, 2007 soc Page 2 of 16 The public hearing on the proposed subdivision ofRosemonte was conducted concurrently with the public hearing on the proposed subdivision of East Renton (ODES File No. L02P0005). Participants at the public hearing and the exhibits offered and entered are listed in the attached minutes. At 12:31 p.m. the hearing was continued for administrative purposes, to allow for the submission of proposed exh. no. 29, providing proposed text for modifications to the department's recommended conditions. Exhibit 29 was received by the Hearing Examiner on March 22, 2007, and the hearing was declared closed on March 23, 2007. A verbatim recording of the hearing is available in the office of the King County Hearing Examiner. ISSUES AND TOPICS ADDRESSED: • Recreation area • Red-tailed hawks nest • Wetland buffers• Safe walking conditions • Surface water drainage SUMMARY: The proposed subdivision of9.35 acres into 25 lots in the urban area is approved subject to conditions. FINDINGS, CONCLUSIONS & DECISION: Having reviewed the record in this matter, the Examiner now makes and enters the following: FINDINGS: I. General Information: Developer: Camwest Real Estate Development, Inc. 9720 NE 1201h Place, Suite 100 Kirkland, WA 98034 Contact: Sara Slatten 425-825-1955 Engineer: Triad Associates 12112 115th Ave NE Kirkland, WA 98034 Contact: Gerry Buck 425-821-8448 STR: 10-23-05 Location: West of 148th Ave SE and south ofSEl 17th St., if extended Parcel: 1023059395 Zoning: R-4 Acreage: 9 .3 5 acres Number of Lots: 25 Density: Approximately 2.6 units per acre Lot Size: Approximately 5,300 square feet in size Proposed Use: Single Family Detached Dwellings Sewage Disposal: City of Renton Water Supply: Water District# 90 Fire District: City of Renton soc School District: Issaquah School District Complete Application Date: July 8, 2003 Page 3 of 16 2. Except as modified herein, the facts set forth in the King County Land Use Services Division's preliminary report to the King County Hearing Examiner for the March 22, 2007, public hearing are found to be correct and are incorporated herein by this reference. The LUSD staff recommends approval of this· subdivision, subject to conditions. 3. Development of this subdivision may affect, and lead to the abandonment of, a red-tailed hawks nest on the adjacent property to the south {proposed subdivision of East Renton). The red-trailed hawk is not an endangered or threatened species, and no protection of the red-tailed hawk is afforded by law or the King County Code within the designated urban area of King County. 4. The applicant has submitted a revised recreation plan for this subdivision and the adjacent plat of East Renton (exh. no. 26). This plan would provide adequate area within Tract B, a trail adjacent to proposed lot 11, and within Tracts C, G and E and a proposed trail in the adjacent plat of East Renton, to serve these plats jointly with well conceived amenities for recreation and open space, consistent with the requirements of the King County Code. To the extent that a portion of the recreation area necessary to meet the requirements for this plat is located on the East Renton Plat property, that variation from KCC 2 IA.14.180 can be corrected by boundary line adjustment or recording the two plats as a single plat, if DOES determines that it is necessary to do so. 5. Wetland buffers within this subdivision will need to be modified, utilizing the buffer averaging provisions of the critical areas code, to accommodate the proposed alignment of 145th Avenue Southeast in the vicinity of the south property line. 6. The proposed subdivision will provide for safe walking conditions for students who will walk to Apollo Elementary School on southeast I 17th Street by constructing urban improvements to 148th Avenue Southeast from the plat to Southeast I 17th Street. A school crosswalk (crossing 148th Avenue Southeast) is located on the north side of Southeast I 17th Street, where an existing walkway is used by students to travel along the north side of Southeast I 17th Street, east from 148th Avenue Southeast to the school. This crosswalk also serves students walking from the area north of Southeast I 17th Street. Consequently, the crosswalk should be maintained north of Southeast 11 7th Street, unless it is physically impractical to do so because of constraints resulting from the topography within the right-of-way for 148th Avenue Southeast, south of Southeast I 17th Street. If those constraints preclude extending curb, gutter and sidewalk from this plat to the north side of Southeast I 17th Street, the crosswalk can be relocated to the south, and improvements made on the east side of 148th Avenue Southeast extending north from the relocated crosswalk to Southeast I 17th Street. 7. The conceptual review of drainage plans has shown that there are no downstream .impacts likely to occur from development of the subject property if Level I flow control and basic water quality treatment improvements are designed and constructed in accordance with the 1998 King County Drainage Manual. The final drainage plan will include calculations to assure that the capacity of drainage facilities and discharge rates will be consistent with those flow control standards. CONCLUSIONS soc Page 4 of 16 I. If approved subject to the conditions recommended below, the proposed subdivision will comply with the goals and objectives of the King County Comprehensive Plan, subdivision and zoning codes, and other official land use controls and policies of King County. 2. If approved subject to the conditions recommended below, this proposed subdivision will make appropriate provision for the public health, safety and general welfare, and for open spaces, drainage ways, streets, other public ways, transit stops, potable water supply, sanitary waste, parks and recreation, playgrounds, schools and school grounds and safe walking conditions for students who only walk to school; and it will serve the public use and interest. 3. The conditions for final plat approval recommended below are in the public interest and are reasonable and proportionate requirements necessary to mitigate the impacts of the development upon the environment. 4. The dedications of land or easements within and adjacent to the proposed plat, as required for final plat approval or as shown on the proposed preliminary plat submitted by the Applicant on March 31, 2006 and the conceptual recreation plan submitted March 22, 2007 (exh. 26), are reasonable and necessary as a direct result of the development of this proposed plat, and are proportionate to the impacts of the development. 5. No provisions are required to be made by this subdivision for the protection of the red-tailed hawks nest(s) on the site. 6. The proposed conceptual recreation plan submitted as exh. no. 26 is a reasonable and appropriate plan to . serve the plats of East Renton and Rosemonte jointly. Minor alterations may be made in the final design and review by ODES, and boundary adjustments, if necessary, may be made to comply with provisions of KCC 21A.14.I80-200. 7. Revisions to the wetland buffers will be necessary to comply with the provisions of the King County Critical Areas Code, to permit construction of 145th Avenue Southeast in the vicinity of the south property line. 8. In order to provide for safe walking conditions for students walking from this development to Apollo Elementary School, urban improvements must be made to 148th Avenue Southeast north from the proposed plat to the north side of Southeast I 17th Street. These improvements should be made to the west side of 148th Avenue Southeast to the extent it is feasible to do so. In the event it is not practical to construct improvements extending to the existing crosswalk located at the north side of Southeast I 17th Street, a crosswalk may be established south of Southeast I 17th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast I 17th Street. 9. Calculations for surface water detention facilities shall assure that the release of storm water from the site does not exceed the rates allowed by the 1998 King County Drainage Manual for achieving Level I flow control. DECISION The proposed preliminary plat of Rosemonte as revised and revised and received on March 3 I, 2006 is approved, subject to the following conditions of final plat approval: I. Compliance with all platting provisions of Title 19A of the King County Code. Actual final recording of the plat ofRosemonte/LOJi>oois shall either occur subsequent to or concurrent with the recording of the Plat of East Renton/L02P0005. soc Page 5 of 16 2. All persons having an ownership interest in the subject property shall sign on the face of the final plat a dedication that includes the language set forth in King County Council Motion No. 5952. 3. The plat shall comply with the base density and minimum density requirements of the R-4 zone classification. All lots shall meet the minimum dimensional requirements of the R-4 zone classification or shall be as shown on the face of the approved preliminary plat, whichever is larger, except that minor revisions to the plat which do not result in substantial changes may be approved at the discretion of the Department of Development and Environment Services. Any/all plat boundary discrepancy(ies) shall be resolved to the satisfaction of DOES prior to the submittal of the final plat documents. As used in this condition, "discrepancy" is a boundary hiatus, an overlapping boundary or a physical appurtenance which indicates an encroachment, lines of possession or a conflict of title. 4. The applicant must obtain final approval from the King County Health Department. 5. All construction and upgrading of public and private roads shall be done in accordance with the King County Road Standards established and adopted by Ordinance No. 11187, as amended (1993 KCRS). 6. The applicant must obtain the approval of the King County Fire Protection Engineer for the adequacy of the fire hydrant, water main, and fire flow standards of Chapter 17.08 of the King County Code. All future residences constructed within this subdivision are required to be sprinklered (NFPA 130) unless the requirement is removed by the King County Fire Marshal or his/her designee. The Fire Code requires all portions of the exterior walls of structures to be within 150 feet (as a person would walk via an approved route around the building) from a minimum 20-foot wide, unobstructed driving surface. To qualify for removal of the sprinkler requirement, driving surfaces between curbs must be a minimum of28 feet in width when parking is allowed on one side of the roadway, and at least 36 feet in width when parking is permitted on both sides. The road width requirement applies to both on-site access and roads accessing the subdivision. Storm Drainage 7. Final plat approval shall require full compliance with the drainage provisions set forth in King County Code 9.04. Compliance may result in reducing the number and/or location of lots as shown on the preliminary approved plat. Preliminary review has identified the following conditions of approval, which represent portions of the drainage requirements. All other applicable requirements in KCC 9.04 and the Surface Water Design Manual (SWDM) must also be satisfied during engineering and final review. a. Drainage plans and analysis shall comply with the 1998 King County Surface Water Design Manual. DOES approval of the drainage and roadway plans is required prior to any construction. b. Current standard plan notes and ESC notes, as established by DOES Engineering Review shall be shown on the engineering plans. c. The following note shall be shown on the final recorded plat: "All building downspouts, footing drains, and drains from all impervious surfaces such as patios and driveways shall be connected to the permanent storm drain outlet as shown on the approved soc Page 6 of 16 construction drawings# on file with DDES and/or the Department of Transportation. This plan shall be submitted with the application of any building permit. All connections of the drains must be constructed and approved prior to the fi_nal building inspection approval. For those lots that are designated for individual lot infiltration systems, the systems shall be constructed at the time of the building permit and shall comply with the plans on file." d; Storm water facilities shall be designed using the KCRTS level one flow control standard. Water quality facilities shall also be provided using the basic water quality protection menu. The size of the proposed drainage tracts may have to increase to accommodate the required detention volumes and water quality facilities. All runoff control facilities shall be located in a separate tract and dedicated to King County unless portions of the drainage tract are used for recreation space in accordance with KCC 21A.14.180. e. The applicant has received approval for a drainage adjustment application regarding the proposed shared facility detention pond. The adjustment decision is contained within file number L04V0103. During final review of the engineering plans, all applicable conditions of the adjustment approvals shall be satisfied. f. As stated in the drainage adjustment decision, the detention pond shall be designed using the Level I flow control standard and basic water quality standards are required for design of the drainage facility. If a wet pond facility is provided for water quality, the design shall comply with the 3: 1 flow length ratio as outlined on page 6-72 in the drainage manual. = g. As required by Special Requirement No. 2 in the drainage manual, the I 00-year floodplain boundaries for the onsite wetlands shall. be shown on the final engineering plans and recorded plat. Access/Roads 8. The proposed subdivision shall comply with the 1993 King County Road Standards (KCRS) including the following requirements: a. During preliminary review the applicant submitted a road variance application (File No. L06V0042), regarding the sag vertical curve and substandard stopping sight distance along the plat frontage. In response to the variance application, the King County Road Engineer provided a decision letter dated June 20, 2006 which approved the variance based upon required illumination for the sag curve on 148th Ave SE. The final road improvements and design plans for the project shall demonstrate compliance with all applicable conditions of approval as stated in the variance decision. b. 148th Avenue SE shall be improved along the frontage as an urban collector arterial including all design criteria from the road variance decision. In accordance with KCRS 2.02, the curb location shall be designed at 22-feet from the road crown to provide full width travel lanes and a bike lane. The preliminary design plan for Rosemonte shows road grading extending outside the right-of- way on the east side of 148th Ave SE. During final engineering review, the applicant shall acquire easements for any proposed construction on private property or provide an alternative design which is acceptable to King County for road construction within the existing right-of-way.- If desired by the applicant, the road frontage improvements for Rosemonte may be satisfied by development of the East Renton plat. soc Page 7 of 16 c. The proposed loop road within the subdivision (SE I 18th St.) shall be improved as an urban subaccess street. d. Tract A shall be improved as a private joint use driveway serving a maximum of two lots. The serving lots shall have undivided ownership of the tract and be responsible for its maintenance. As specified in KCRS 3.0IC, improvements shall include an 18 foot paved surface and a minimum tract width of20 feet. Drainage control shall include a curb or thickened edge on one side. e. Street trees shall be included in the design of all road improvements and shall comply with Section 5.03 of the KCRS. f. Street illumination shall be provided along the plat frontage for arterial streets in accordance with KCRS 5.05. g. The proposed road improvements shall address the requirements for road surfacing outlined in KCRS Chapter 4. As noted in section 4.0IF, full width pavement overlay is required where widening existing asphalt, unless otherwise allowed by King County. h. 148th Ave SE is classified an arterial street which may require designs for bus zones and turn outs. As specified in KCRS 2.16, the designer shall contact Metro and the local school district to determine specific requirements. i. Modifications to the above road conditions may be considered by King County pursuant to the variance procedures in KCRS 1.08. 9. All utilities within proposed rights-of-way must be included within a franchise approved by the King County Council prior to final plat recording. 10. The plat plan for Rosemonte shows a retaining wall associated with 145th Ave SE which extends into the BSBL for the wetland buffer. During engineering review for East Renton, a revised road alignment and grading plan shall be provided which demonstrates that road construction within Rosemonte will comply with applicable sensitive area codes. The revised road design and grading plan may result in modification or loss of lots as shown on the preliminary plat. Alternatively, the applicant may seek approval to use buffer averaging as a means to revise the location of the buffer and BSLB to achieve code compliance. 11. There shall be no direct vehicular access to or from 148th Ave SE from those lots which abut it. A note to this effect shall appear on the engineering plans and the final plat. 12. Off-site access to the subdivision shall be over a full-width, dedicated and improved road which has been accepted by King County for maintenance. If the proposed access road has not been accepted by King County at the time of recording, then said road shall be fully bonded by the applicant of this subdivision. 13. The applicant shall provide a safe walking access to Apollo Elementary School with urban improvements along the west side of 148th Ave NE to the existing crosswalk on the north side of SE I 17th St. This improvement includes urban frontage improvements along property frontage of the Plat of East Renton, north of SE I 19th Street, as well as urban improvements along frontage of Rosemonte and urban soc Page 8 of 16 improvements north to the existing crosswalk on the north side of SE 11 lh St. In the event it is not practical to construct urban improvements on the west side of 148th Avenue Southeast extending to the existing crosswalk, a new crosswalk may be established south of Southeast I 17th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast I 17th Street. This alternative may use a graded surface on the east side of 148th Ave SE to ensure that school-age pedestrians are provided an acceptable-width walkway surface behind the curbing. The walkway shall be designed to the satisfaction of the school district and DOES. Mitigation/Impact Fees 14. The applicant or subsequent owner shall comply with King County Code 14.75, Mitigation Payment System (MPS), by paying the required MPS fee and administration fee as determined by the applicable fee ordinance. The applicant has the option to either: (I) pay the MPS fee at the final plat recording, or (2) pay the MPS fee at the time of building permit issuance. lfthe first option is chosen, the fee paid shall be the fee in effect at the time of plat application and a note shall be placed on the face of the plat that reads, "All fees required by King County Code 14.75, Mitigation Payment System (MPS), have been paid." lfthe second option is chosen, the fee paid shall be the amount in effect as of the date of building permit application. 15. Lots within this subdivision are subject to King County Code 21 A.43, which imposes impact fees to fund school system improvements needed to serve new development. As a condition of final approval, fifty percent (50%) of the impact fees due for the plat shall be assessed and collected immediately prior to the recording, using the fee schedules in effect when the plat receives final approval. The balance of the assessed fee shall be allocated evenly to the dwelling units in the plat and shall be collected prior to building permit issuance. Wetlands 16. Preliminary plat review has identified specific requirements which apply to this project as listed below. All other applicable requirements from K.C.C. 21 A.24 shall also be addressed by the applicant. a. The Class 2 wetland shall have a minimum SO-foot buffer of undisturbed vegetation as measured from the wetland edge. b. Sensitive area tract(s) shall be used to delineate and protect sensitive areas and buffers in development proposals for subdivisions and shall be recorded on all documents of title of record for all affected lots. c. Buffer width averaging may be allowed by King County if it will provide additional protection to the wetland/stream or enhance there functions, as long as the total area contained in the buffer on the development proposal site does not decrease. In no area shall the buffer be less than 65 percent of the required minimum distance. To ensure such functions are enhanced a mitigation plan will be required for.the remaining on-site sensitive areas. An enhancement plan shall be submitted for review during engineering review. d. A IS-foot BSBL shall be established from the edge of buffer and/or the sensitive areas Tract(s) and shown on all affected lots. e. To ensure long term protection of the Sensitive Areas a split-railed fence ofno more than 4 feet in height shall be installed along the Sensitive Area Tract boundaries in the area of proposed lots. soc Page 9 of 16 Sensitive Area signs shall be attached to the fence at no less than I 00 foot intervals. f. If alterations of streams and/or wetlands are approved in conformance with K.C.C. 21 A.24, then a detailed plan to mitigate for impacts from that alteration will be required to be reviewed and approved along with the plat engineering plans. A performance bond or other financial guarantee will be required at the time of plan approval to guarantee that the mitigation measures are installed according to the plan. Once the mitigation work is completed to a DOES Senior Ecologist's satisfaction, the performance bond may be replaced by a maintenance bond for the remainder of the five-year monitoring period to guarantee the success of the mitigation. The applicant shall be responsible for the installation, maintenance and monitoring of any approved mitigation. The mitigation plan must be installed prior to final inspection of the plat. g. Prior to commencing construction activities on the site, the applicant shall temporarily mark sensitive areas tract(s) in a highly visible manner, and these areas must remain so marked until all development proposal activities in the vicinity of the sensitive areas are completed. h. During engineering plat review the applicant shall provide a wetland hydrology analysis to demonstrate how the wetland hydrology will be maintained post-construction. i. Detention out-fall structures maybe permitted within the wetland/stream buffers, however, structures shall be located in the outer edge of the buffer, if possible. All buffer impacts shall be mitigated. 11. Development authorized by this approval may require other state and/or federal permits or approvals. It is the applicant's responsibility to correspond with these agencies prior to beginning work.on the site. 12. During engineering review, the plan set shall be routed to the sensitive areas group to determine if the above conditions have been met. Geo technical 13. The applicant shall delineate all on-site erosion hazard areas on the final engineering plans (erosion hazard areas are defined in KCC 21A.06.415). The delineation of such areas shall be approved by a DOES geologist. The requirements found in KCC 21A.24.220 concerning erosion hazard areas shall be met, including seasonal restrictions on clearing and grading activities. 14. The geotechnical work for this project shall be accomplished in accordance with recommendations presented in the geotechnical engineering report dated April 23, 2003 by Associated Earth Sciences, Inc. a. Structural fill placement shall be continuously monitored and approved in writing by the project geotechnical engineer or engineering geologist. b. After excavation and prior to structural fill or foundation placement, all bearing soils shall be inspected and approved in writing by an experienced geotechnical engineer or engineering geologist. c. Structural fill placed for improved areas such as pavements or floor slabs shall be compacted to at least 95 percent of the maximum dry density by ASTM test designation D-1557 (Modified Proctor) or as recommended by the project geotechnical engineer or engineering geologist. d. All pile foundation installations shall be continuously monitored by a registered geotechnical engineer or a licensed engineering geologist for compliance with an approved plan and the geotechnical report. Compliance and approval of the pile foundation installation shall be documented in a report to the King County site or building inspector. soc Page 10 of 16 e. The location and height of any proposed rockeries or retaining walls shall be shown on the engineering plans. f. Any created fill slope that is 40 percent or steeper and IO feet or greater in vertical height shall be subject to a 50-foot wide buffer plus a 15-foot wide setback area from its top, toe and sides. This buffer may be reduced to IO feet with a satisfactory evaluation by a registered geotechnical engineer or licensed engineering geologist. g. The applicant shall delineate all on-site erosion hazard areas on the final engineering plans (erosion hazard areas are defined in KCC 21A.06.415). The delineation of such areas shall be approved by a DDES geologist. The requirements found in KCC 2 IA.24.220 concerning erosion hazard areas shall be met, including seasonal restrictions on clearing and grading activities. Sensitive Area 11. The following note shall be shown on the final engineering plan and recorded plat: RESTRICTIONS FOR SENSITIVE AREA TRACTS AND SENSITIVE AREAS AND BUFFERS Dedication of a sensitive area tract/sensitive area and buffer conveys to the public a beneficial interest in the land within the tract/sensitive area and buffer. This interest includes the preservation of native vegetation for all purposes that benefit the public health, safety and welfare, including control of surface water and erosion, maintenance of slope stability, and protection of plant and animal habitat. The sensitive area tract/sensitive area and buffer imposes upon all present and future owners and occupiers of the land subject to the tract/sensitive area and buffer the obligation, enforceable on behalf of the public by King County, to leave undisturbed all trees and other vegetation within the tract/sensitive area and buffer. The vegetation within the tract/sensitive area and buffer may not be cut, pruned, covered by fill, removed or damaged without approval in writing from the King County Department of Development and Environmental Services or its successor agency, unless otherwise provided by law. The common boundary between the tract/sensitive area and buffer and the area of development activity must be marked or otherwise flagged to the satisfaction of King County prior to any clearing, grading, building construction or other development activity on a lot subject to the sensitive area tract/sensitive area and buffer. The required marking or flagging shall remain in place until all development proposal activities in the vicinity of the sensitive area are completed. No building foundations are allowed beyond the required 15-foot building setback line, unless otherwise provided by law. Recreational Area 12. The plat design shall be revised to provide the minimum suitable recreation space consistent with the requirements of K.C.C. 21A.14.180 and K.C.C. 21A. 14.190 (i.e., minimum area, as well as; sport court [s], children's play equipment, picnic table[s], benches, etc.), as shown on hearing exh. no. 26. a. A detailed recreation space plan (i.e., location, area calculations, dimensions, landscape specs, equipment specs, etc.) shall be submitted for review and approval by DDES prior to or concurrent with the submittal of engineering plats. soc Other Page 11 of 16 b. A perfonnance bond for recreation space improvements shall be posted prior to recording of the plat. c. Modify the plat, as needed to comply with KCC 21 A.14.180.F, as shown in hearing exh. no. 26 for the plat of East Renton (DOES File No. L02P0005). I 3. A homeowners' association or other workable organization shall be established to the satisfaction of ODES which provides for the ownership and continued maintenance of the recreation, open space and/or sensitive area tract(s), which combine usage of the recreation area of the plat of East Renton (ODES File No. L02P0005) and this plat, as shown in hearing exh. no. 26 for the plat of East Renton. 14. Street trees shall be provided as follows (per KCRS 5.03 and K.C.C. 21A. l6.050): a. Trees shall be planted at a rate of one tree for every 40 feet of frontage along all roads. Spacing may be modified to accommodate sight distance requirements for driveways and intersections. b. Trees shall be located within the street right-of-way and planted in accordance with Drawing No. 5-009 of the 1993 King County Road Standards, unless King County Department of Transportation detennines that trees should not be located in the street right-of-way. c. If King County determines that the required street trees should not be located within the right-of-way, they shall be located no more than 20 feet from the street right-of-way line. d. The trees shall be owned and maintained by the abutting lot owners or the homeowners association or other workable organization unless the county has adopted a maintenance program. Ownership and maintenance shall be noted on the face of the final recorded plat. e. The species of trees shall be approved by DOES if located within the right-of-way, and shall not include poplar, cottonwood, soft maples, gum, any fruit-bearing trees, or any other tree or shrub whose roots are likely to obstruct sanitary or stonn sewers, or that is not compatible with overhead utility lines. f. The applicant shall submit a street tree plan and bond quantity sheet for review and approval by DOES prior to engineering plan approval. g. The applicant shall contact Metro Service Planning at (206) 684-1622 to detennine if 148th Ave SE is on a bus route. If 148th Ave SE is a bus route, the street tree plan shall also be reviewed by Metro. h. The street trees must be installed and inspected, or a perfonnance bond posted prior to recording of the plat. If a perfonnance bond is posted, the street trees must be installed and inspected within one year ofrecording of the plat. Atthe time of inspection, if the trees are found to be installed per the approved plan, a maintenance bond must be submitted or the perfonnance bond replaced with a maintenance bond, and held for one year. After one year, the maintenance bond may be released after DOES has completed a second inspection and determined that the trees have been kept healthy and thriving. i. A landscape inspection fee shall also be submitted prior to plat recording. The inspection fee is subject to change based on the current county fees. soc Page 12 of 16 25. The engineering plans for this project shall identify the location of any wells on the site and provide notes which address the requirements for the contractor to abandon the well(s) pursuant to requirements outlined in the Washington Administrative Code (WAC 173-160). SEPA 26. The following have been established by SEPA as necessary requirements to mitigate the adverse environmental impacts of this development. The applicants shall demonstrate compliance with these items prior to final approval. (I.) To mitigate the significant adverse impact the plat of Rosemonte will have on the intersections of SR 900/148th Ave SE and SR 900/164th Ave SE, the applicant shall install, either individually or in conjunction with other development projects in this area, the following improvements at the SR 900/148th Ave intersection: • A traffic signal, and • Eastbound and westbound left turn lanes The design for the SR 9001148th Ave intersection improvements shall be approved by the Washington State Department of Transportation (and by King County to the extent such improvements are located in County right-of-way). In addition, at a minimum, the existing entering sight distance looking east for the north and south legs of the intersection (602 feet and 386 feet, respectively) shall not be reduced as part of the intersection improvements. Documentation shall be submitted to show this requirementis met. All construction work associated with the intersection improvements shall be completed between April I st and September 30th. This seasonal restriction shall be clearly shown on the final engineering plans. In lieu of the installation of the above-noted intersection improvements prior to final plat approval, the applicant may post a financial guarantee with WSDOT which assures the installation of these improvements within two years of the recording ofRosemonte. In this event, intersection improvement design must be approved by WSDOT prior to King County approval of the engineering plans for Rosemonte. If the above-noted intersection improvements have already been made by others prior to the recording of Rosemonte, or a financial guarantee has been posted by others which assures the installation of these improvements, then the applicant for Rosemonte shall pay a pro-rata share dollar amount to the developer who has made the improvements or "bonded" for the improvements, in an amount proportional to the impacts of Rosemonte. The pro-rata share dollar amount to be paid shall be set by WSDOT, and documentation shall be provided by the Rosemonte applicant to the King County Land Use Services Division to show this payment has been made, prior to final plat recording. The pro-rata dollar amount to be paid shall be based on the following: The final Rosemonte lot count • The trip distribution for Rosemonte • The total trips contributed to the intersection of SR 900.148th Ave by the plats of Aster Park (LOOP0024), Stone Ridge 9L99P3008), East Renton (L02P0005), Shamrock (L02P0014), Rosemonte (aka lronwood- L03P00'!.!!), Martin (LOSPOO 19) and any future land use applications submitted to King County for which soc Page 13 of 16 compliance with the King County Intersection Standards (KCC 14.80) is required at either the SR 9001148th Ave intersection, or the SR 9001164th Ave High Accident Location. In the event that either King County or WSDOT adopts a formal "latecomer's" system prior to final plat recording, that system may be followed in lieu of the approach described above, at the discretion of the applicant, as long as at a minimum there is a financial guarantee which assures the above-noted intersection improvements will be installed within two years of the date of recording of the plat of Rosemonte. [Comprehensive Plan Policy T-303 and King County Code 21A.28.060A] (2.) Documentation shall be provided to demonstrate to the satisfaction of WSDOT that stopping sight distance (360 feet) is available on the east leg of the SR 9001148th Ave intersection. The intersection shall be modified by the applicant, if necessary, so that this stopping sight distance requirement is met on the east leg. In addition, the applicant shall clear vegetation within the right-of-way along SR 900, east of 148th Ave., to maximize the entering sight distance for the north and south legs of the intersection. [Comprehensive Plan Policy T-303 and King County Comprehensive Policy T-303 and King County Code 21A.28.060A] ORDERED this 10th day of April, 2007. James N. O'Connor King County Hearing Examiner pro tern TRANSMITTED this 9th day of April, 2007, to the parties and interested persons of record: Robert L. Anderson Cam West Devel., Inc. Kristine & Keith Childs PO Box 353 Attn: Sara Slatten 12004 -148th Ave. SE Maple Valley WA 98038 9720 NE 120th Pl. #100 Renton WA 98059 Kirkland WA 98034 Claudia Donnelly Renee & Mark Engbaum John Graves I 0415 -14 7th Ave. SE 5424 NE 10th St. Lozier Homes Renton WA 98059 Renton WA 98059-4386 1203 I 14th Ave. SE Bellevue WA 98004 Ralph Hickman Robert D. Johns Rebecca Lind 9720 NE 120th Pl. #100 Johns Monroe Mitsunaga City of Renton, EDNSP Kirkland WA 98034 160 I -I 14th Ave. SE,# 110 1055 S. Grady Way Bellevue WA 98004 Renton WA 98057 Seattle KC Health Dept. Triad Associates Kim Claussen soc E. Dist. Environ. Health 12112 -115th Ave NE DDES/LUSD 14350 SE Eastgate Way Kirkland WA 98034 MS OAK-DE-0100 Bellevue WA 98007 Lisa Dinsmore Peter Dye Nick Gillen DDES/LUSD DDES/LUSD DDES/LUSD MS OAK-DE-0100 MS OAK-DE-0100 MS OAK-DE-0100 Shirley Goll Kristen Langley Karen Scharer DDES/LUSD DDES/LUSD DDES/LUSD MS OAK-DE-0100 MS OAK-DE-0100 MS OAK-DE-0100 Steve Townsend Larry West Kelly Whiting DDES/LUSD DDES/LUSD KC DOT, Rd. Srvcs. Div. MS OAK-DE-0100 MS OAK-DE-0100 MS KSC-TR-0231 Bruce Whittaker DDES/LUSD MS OAK-DE-0100 NOTICE OF RIGHT TO APPEAL Page 14 of 16 In order to appeal the decision of the Examiner, written notice of appeal must be filed with the Clerk of the King County Council with a fee of $250.00 (check payable to King County Office of Finance) on or before April 24, 2007. If a notice of appeal is filed, the original and six (6) copies of a written appeal statement specifying the basis for the appeal and argument in support of the appeal must be filed with the Clerk of the King County Council on or before May I, 2007. Appeal statements may refer only to facts contained in the hearing record; new facts may not be presented on appeal. Filing requires actual delivery to the Office of the Clerk of the Council, Room l 025, King County Courthouse, 516 ld Avenue, Seattle, Washington 98 l 04, prior to the close of business (4:30 p.m.) on the date due. Prior mailing is not sufficient if actual receipt by the Clerk does not occur within the applicable time period. The Examiner does not have authority to extend the time period unless the Office of the Clerk is not open on the specified closing date, in which event delivery prior to the close of business on the next business day is sufficient to meet the filing requirement. If a written notice of appeal and filing fee are not filed within fourteen (14) calendar days of the date of this report, or if a written appeal statement and argument are not filed within twenty-one (21) calendar days of the date of this report, the decision of the hearing examiner contained herein shall be the final decision of King County without the need for further action by the Council. MINUTES OF THE MARCH 22, 2007, PUBLIC HEARING ON DEPARTMENT OF DEVELOPMENT AND ENVIRONMENTAL SERVICES FILE NO. L02P0005 James N. O'Connor was the Hearing Examiner in this matter. Participating in the hearing were Karen Scharer, Pete Dye and Kristen Langley, representing the Department; Robert Johns representing the Applicant; and Renee soc Page 15 of 16 Engbaum. Exhibit No. l DOES file L02P0005 Exhibit No. 2 ODES preliminary report for L02P0005, prepared 12/29/2006 with attachments as follow: 2. l. Plat Map w/66 Lot Plat Design 2.2. City of Renton Sewer Availability 2.3. Road Variance/L03V0049 2.4. Surface Water Management Variance/L02V0089 2.5 Surface Water Management Variance/L04V0103 2.6. Density Calculations w/R-4 zoning 2. 7 Recreation cross section for Tract G (previou'sly labeled Tract C) Exhibit No. 3 Application for land use permit no. AO 1 P0071 received 4/3/2002 Exhibit No. 4 Environmental checklist received 4/3/2002 Exhibit No. 5 Revised SEPA Mitigated Determination ofNonsignificance, date of revised issuance: 12/29/2006 Exhibit No. 6 Affidavit of posting of Notice of Application indicating posting date of 5/3/2002, received by ODES on 5/3/2002 Exhibit No. 7 Revised Site plan (66 lot preliminary plat map) received 3/17/2006 Exhibit No. 8 Assessor's maps (2) SE 10-23-05 & SW 11-23-05 Exhibit No. 9 Revised Level 1 Downstream Analysis by Triad & Associates, received 1 l/24/2004 Exhibit No. l O Traffic Impact Analysis by Gary Struthers Associates received 4/3/2002 Exhibit No. l l Request for School Information form from the Issaquah School District, received 4/25/2002 Exhibit No. 12 King County Certificate of Water Availability, received 4/03/2002 Exhibit No. 13 Vicinity Map for L05POO 19, il'iBP-001'8 & L02P0005, prepared by KC staff on 3/19/2007 Exhibit No. 14 DOES Field Report and GlS Information dated 5/1/2002 Exhibit No. 15 Revised Wetlands Determination and Habitat analysis by C. Gary Schulz dated 9/12/2002 Exhibit No. 16 Watertype/stream Classification Survey comments from Washington Trout, dated 10/15/2004 Exhibit No. 17 Drainage outfall report by Associated Earth Sciences, Inc., dated 9/24/2002 Exhibit No. 18 Boundary line adjustment proposal with attached map, dated 5/3/2004 Exhibit No. 19 Not entered Exhibit No. 20 Response to East Renton Transportation Comments by Gary Struthers Associates, Inc., dated 1/23/2003 Exhibit No. 21 Washington State Department ofTranportation comments regarding Traffic Impact Analysis, dated 1 I/ 13/2002 Exhibit No. 22 Letter from Claudia Donnelly dated 6/13/2003 regarding basin plan, with 2 attachments Exhibit No. 23 Note from Claudia Donnelly with attached copy of 11/12/03 newspaper article regarding transportation model Exhibit No. 24 City of Renton comments, regarding sewer service, dated 3/28/2002 Exhibit No. 25 Revised language for Condition 6 Exhibit No. 26 Conceptual recreation plan by Triad Associates Exhibit No. 27 Revised preliminary plat received March 22, 2007 Exhibit No. 28 Letter from Renee and Mark Engbaum dated March 22, 2007, with attached map indicating the location of their property Exhibit No. 29 Revisions to Conditions 20, 21 and 22 soc JNOC:gao Lil3Pli0is RPT L03'i'00 I &_-Rosemonte Document Properties Title: Rosemonte Subject: Preliminary Plat Application Author: O'Connor Page 16 of 16 Keywords: Red·tailed hawks nest, Safe walking conditions, Recreation area, Wetland buffers, Surface water drainage Comments:, Approve, s,u,bject to re~ised conditions (modified) Template: Normal.dot Last saved by: Ohrmundt, Ginger Revision number: 2 Application: Microsoft Word 10.0 Total editing time: 00:00:00 Last printed: 2007/04/10 16:55:00 Created: 2007/04/10 23:52:00 Last saved: 2007/04/10 23:52:00 Category: . April 2007 dtSearch 7.30 (7320) Manager: ~03.!'.0Q!ij Company: DDES ' ® King County Department of Development and Environmental Services Land Use Services Division " Drop-Off Lover Sheet for LUSD ONLY 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 206-296-6600 TTY 206-296-7217 For alternate formats, call 206-296-6600. Drop-Off Cover Sheet for Land Use Services Division ******'********************** IMPORTANT **'* .. ~*'*****'************** PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS Projecl No.: LO;).POOOS / L03'POO 18 • Project Name: Ea.s+ &n+on / /Zosuno-r1.-f:o...,. FROM: 1r,ad A.ssocia hes l&,e-k T=kins Company Name I Contact Person , (oa_nnL, 04t'.l5crn Date Received by LUSD G Telephone No: (4:;;;s') S;;:i /-£Y-IL/B TIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat / Plats Please specify item(s) dropped-off: Lot Line Adlustment 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 ltem(s) dropped-off: ~ ~--;·, -F-~ c, (") i-.> ·s - ·,s -0 f<I -,r. .IJI r:,? ... Other: __ .,_,5--""'e ,,,,2"-, --'~====-==d._=---------------------- 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 p'roperly before you drop-off anything. Assistance in finding a project number can be provided by speaking to a Zoning/Land Use Technician. Your cooperation is important. Thank you. Check out the DDES Web site at www.metrokc.gov/ddes Drop-Off Cover Sheet-LUSD Only lg-cvs-dropoff.pdf 11-03-2004 Page 1 of 1 Date: May 20, 2008 To: Joanne Carlson King County DDES 900 Oakesdale Ave SW Renton, WA 98055 Job No: 01-047 Project: East Renton/Rosemonte Enclosed are: IZJ Prints D Copies D Reproducibles IZJ Reports D Documents D Specifications D Other These have been sent: D For Your Use IZJ For Your Review I Approval D For Your Signature I Return D At Your Request D For Your Records D For Your Information D Other 3 3 5/16/08 5/16/08 Early Start Full Size Plan Sets Early Start Technical Information Report Remarks: 12112 llSthAvenue NE Kirkland. WA 98034-6929 425.821.8448 425821.3481 fax 800.488.0756 toll free www.tri~dassoc.com If you have any questions or comments regarding the enclosed please contact Sheri Murata, PE or Rick Tomkins, Project Principal at (425)821-8448. Sent By: ~=·...___.;r7'--'· :........,_~4:...-=..,..,q//'---'---~ M. Ryan 7 Administrative Assistant Copies To: Jennifer Reiner, Cam West ~ ~~~~ @ilili2l:J..4l.@oliil I May 21, 2008 Pete Dye King County Department of Development & Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 RE: East Renton Property: L08SR025 Phased Early Start Processing Dear Pete, Camwest Development would like to request Phased_ Early Start processing for the East Renton/Rosemonte property. In addition, we would like to have the $2159.53 that is currently in the existing account credited toward our Early Start deposit. Should yol! have any questions or need any additional information, please contact me at (425) 825-195~. Thank you for your attention to this matter. Sincerely, · CAMWEST DEVELOPMENT, INC. \n-I 1\JJ\t[. :Ar NJY J~leiner ' · · ' · · Development ProJ ct Manager . ,I ' \. TRIAD ASSOCIATES MEMORANDUM I -· IJ}LZ-;.;> Date: To: From: Re: Triad Job No.: Copies To: April 9, 2008 Gerry Buck, Project Principal Sheri Murata, P.E Wetland Recharge Strategy for East Renton/Rosemonte 01-047 File There are approximately 9.5 acres of wetlands and associated buffers (wetland complex) occupying the western portions of the two plats of East Renton/Rosemonte. On the attached Existing Wetland Tributary Area Exhibit these wetlands are identified as B, C, E and F. Wetlands B and C are located within the East Renton site and Wetland E and F are located within the Rosemonte site. This complex receives sheet flow runoff from the remaining upland portions of both sites as well as portions of the 148'" Ave SE right-of-way. With development, it is proposed that both projects will be served by one detention facility (large combined detention/WO treatment pond), located in a tract in the northeast corner of Rosemonte. This pond will be sized to provide Level One flow control -discharge from the pond will provide recharge to wetland F. In order to maintain hydrology to the remainder of the wetland complex, the yearly volume of runoff from the upslope area draining to it was calculated utilizing King County Runoff Time Series (KCRTS) methodology. Using KCRTS, the existing basin's 1.1-year storm peak was determined to occur on 3/24/04. This date was then bracketed (6-months before and 6-months after) and the time series analyzed to determine the total annual runoff volume during that 1-year period. The 1. 1 year storm was selected because it is the lowest intensity and highest frequency storm that KCRTS can model. Under developed conditions, the goal is to maintain hydrology by recharging the wetland complex with runoff from the roofs and backyards of selected lots. The number of lots (together with some open space tract area) needed to provide recharge equivalent to the existing conditions annual 1.1-year volume was determined by time series iteration. These lots are situated adjacent to or near the wetland complex, with runoff distributed to each wetland via discharge from flow dispersion trenches. [See Developed Wetland Recharge Area Exhibit] ., ' For those recharge roof areas with tightline systems high enough in elevation to physically drain to the detention pond (lots 72-75), a flow splitter will be used to divert flows exceeding the 1.1-year peak flow to the pond. Recharge roof and yard area runoff that does not get routed to the pond (portions of Lots 9 -17, 76 -78, Tracts H and K) will be treated as "bypass" area, and will be compensated for during detention pond sizing. The tables below summarizes the KCRTS-computed 1.1-yr annual volumes for Existing and Developed conditions. Table 1 -Existing Sit, d R-0-W Area Tributary Onslte Wetland Wetland Impervious Till Forest Till Pasture Total Area Ex1.1-yr Area (ac) Area (ac) (ac) (ac) Vol (cf) Band C 0.09 1.96 4.48 6.53 39,072 E and F 2.50 2.50 18,318 Total 57,390 Wetland Impervious TIii Grass Total Area Ex 1.1-yr Area (ac) Area (ac) (ac) Vol (cf) Band C 0.41 0.91 1.32 38,117 E and F 0.23 0.27 0.60 19,384 Total 57,501 L08SR025 Routing Early Start Wetland Review TO: Nick Gillen From: Ted Cooper, ERS~c_ 206-296-7163 June 11, 2008 Subject: Early Start for East Renton & Rosemonte Plats (Activity L08SR025) Project Numbers: East Renton L02P0005 Rosemonte L03P0018 Comments: Please review and comment on the work proposed in the Early Start engineering plans. Consider the following Conditions in the enclosed 2-separate sets of Hearing Examiner's Conditions: 1. Plat of East Renton (L02POOOS): a. Conditions: 15, 17 & 26. 2. Plat of Rosemonte (L03P0018): a. Conditions: 16 & 18. Please determine 'how much of the Wetland Buffer Mitigation Plan needs to be addressed/resolved for the Early Start phase. Enclosures: 1-set of Early Start engineering plans 1-Wetland Buffer Mitigation Plan 1-East Renton Hearing Examiner's Conditions 1-Rosemonte Hearing Examiner's Conditions 1-TIR (Early Start version) L07SR054 Routing -Main Plat Wetland Review TO: Nick Gillen From: Ted Cooper, ERS ~c__ 206-296-7163 June 11, 2008 Subject: East Renton & Rosemonte Plats (Activity L07SR054) Project Numbers: East Renton L02P0005 Rosemonte L03P0018 Comments: Please review and comment on the work proposed in the main engineering plans. Consider the following Conditions in the enclosed 2-separate sets of Hearing Examiner's Conditions: 1. Plat of East Renton (L02P0005): a. Conditions: 15, 17 & 26. 2. Plat of Rosemonte (L03P0018): a. Conditions: 16 & 18. Enclosures: 1-set of main engineering plat plans 1-TIR (complete, non-Early Start version) 1-Wetland Buffer Mitigation Plan Early Start Review Request for Significant Tree and FPA Issues TO: Bruce Engell From: Ted Cooper, ERS ~c_ 206-296-7163 June 12, 2008 Subject: Early Start for East Renton & Rosemonte Plats Activity Number: L08SR025 Project Numbers: Plat of East Renton L02POOOS Plat of Rosemonte L03P0018 Due Date (if possible): June 16, 2008 Comments: 1. Please review and comment on the proposed in the Early Start engineering plans. 2. This plan set is missing some critical items because the engineer didn't understand what we need for an early start permit. 3. Since this is 2-plats, I have enclosed 2-separate sets of Hearing Examiner's Conditions. 4. It appears that an FPA is needed. 5. Is a Tree Retention Plan needed? 6. I have routed this project to Nick Gillen for his wetland review. Enclosures: 1-Early Start engineering plan sheets 1-4 1-Wetland Buffer Mitigation Plan 1-East Renton Hearing Examiner's Conditions 1-Rosemonte Hearing Examiner's Conditions R ~f / ace,WLf/Nf f:. a c.uf-1 ~cy REVISED Constructability Routing for Early Start TO: Land Use Inspection Section From: Ted Cooper, ERS .:;;fc3.. 296-7163 Subject: East Renton & Rosemont Plat PEES Activity: L08SR025 Projects: L02P0005 & L03P0018 Comments: July 17, 2008 1. Please review this Early ·start project for constructability. 2. Notice that plan reviews are pending for the FPA, landscaping and tree retention & SWPPS plans. Enclosures: 1-set REVISED engineering plans (Rec'd 6-11-08) 1-set REVISED Wetland Mitigation plans (Rec'd 6-11-08) 1-REVISED TIR (Rec'd 6-11-08) L08SR025 Routing Early Start Wetland Review TO: Nick Gillen July 17, 2008 From: Ted Cooper, ERS ~(;_, 206-296-7163 Subject: Early Start for East Renton & Rosemonte Plats (Activity L08SR025) Project Numbers: East Renton L02P0005 Rosemonte L03P0018 Comments: Please review the new Early Start (PEES) engineering plans I'm routing you today. These are new plans that replace the ones I routed to you on June 11, 2008. From the June 11 routing please consider the following Conditions in the previously routed 2-separate sets of Hearing Examiner's Conditions: 1. Plat of East Renton (L02P0005): a. Conditions: 15, 17 & 26. 2. Plat of Rosemonte (L03P0018): a. Conditions: 16 & 18. Please determine how much of the Wetland Buffer Mitigation Plan needs to be addressed/resolved for the Early Start phase. Enclosures: 1-Revised Early Start engineering plans 1-Revised Wetland Buffer Mitigation Plan !-Revised TIR (June 25, 2008 PEES version) Date: July 11, 2008 To: Ted Cooper King County DOES 900 Oaksdale Ave SW Renton, WA 98055-1219 Job No: 01-047 Project: East Renton/Rosemonte Enclosed are: [8J Prints 0 Copies D Reproducibles D Reports D Documents D Specifications OOther These have been sent: [8J For Your Use 0 For Your Review I Approval 0 For Your Signature I Return 0 At Your Request D For Your Record, 0 For Your Information 0 Other 4 3 1 7/11/08 7/11/08 7/11/08 Early Start Plans Remarks: Early Start Technical Information Report Early Start Revisions Memorandum 12112 !15th Avenue NE Kirkland, WA 98034-6929 4Z5.821.8448 425.821.3481 fax 800.488.0756 toll free www.triadassoc.com If you have any questions or comments regarding the enclosed please contact Sheri Murata, PE at (425)821-8448. Thank you. """'q!t,<--a2 4'-ar1 ie M. Ryan '-- dm:nistrative Assistant Copies To: * Jennifer Reiner, Cam West *=CD copy of Submittal ® King County Department of Development and Envlronmental Services Land Use Services DIVlalon Drop ... Qff Cover Sheet for lUSD ONLY 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 206-296-6600 ITY 206-296-7217 For alternate formats, call 206-296-6600. Drop-Off Cover Sheet for Land Use Services Division ****************'******•*'**** IMPORTANT **'*******"'******'*********** PROJECT NUMBER AND NAME IS NECESSARY Date Received by LUSD FOR ALL DROP-OFFS Project No.: LOQ.POD05 / L03PD0IP, Project Name: ,; R,, ntc,o / Rrisernorrl:"o . FROM: --:r:tia.d AffiCCio.:bes / Ric.kTorok"1ns j Company Name I Contact Person Telephone No: ( Y~S) ~~1-e,44e, To: Te.cl C,roper: ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please Rrlnt) Short Plat/ Plats Please specify ltem(s) dropped-off: Lot Line Adjustment Permit Please specify item(s) dropped-off: Right of Way Permit Please specify ltem(s) dropped-off: C,earlng / Grading Permit -Additional information requested. Please specify ltem(s) dropped-off: Other: $(J' atlat bRd = ,i? " :r,, " r,1 0 :;o ('} -0 °' ri1 0 -,.., = <--C ::u:: V, -fi1 -.. c· . <.n ....., 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 Zoning/Land Use Technician. Your cooperation is important. Thank you. Check out the DDES Web site at www.metrokc.gov/ddes Drop-Off Cover Sheet-LUSD Only lg-cvs-dropoff.pdf 11-03-2004 Page 1 of 1 Mr. Ted Cooper 2 April l 5, 2008 Finally, we have included some notes indicating phasing of the project. While Camwest intends to open up and perform work on the entire site, they will likely record the project in two phases: Rosemontc and Lots 1-8 (Division I) of East Renton will be recorded first, with the remainder of East Renton (Division 2) to follow. Please let me know if you have any questions regarding this submittal. l would be happy to meet with you to clarify any point or receive your direction. Sincerely, TRIAD ASSOC IA TES IJ;L_ Richard Tomkins, PE Principal Engineer E:\PROJECTS\O I 04 7\ColTespondence\Jurisdiction\King County\Covcr letter TCoopcr 8-04 I 5.doc l ~~ -"i: <\._ ~ 4:.it it Si l ~' '-I-:: "'U O ~ /I~ April 15, 2008 Mr. Ted Cooper Engineer II King County DOES M.S. OAK-DE-0100 RE: East Renton and Rosemonte Plats c:=-- 12112 I 15th Avenue NE Kirkland. WA 98034·6929 425.821.8448 425 821.3481 fax 800.488.0756 toll free www.triadassoc.com King County File Nos. L02P0005, L03P0018 Triad Project No. 01-047 Subject: Road and Storm Plans re-submittal, dated 4/15/08 Dear Ted, I am writing to outline some of the changes made with this plan (and TIR) resubmittal. The most significant change is that we have eliminated the detention vault on East Renton. All East Renton drainage (less wetland recharge) is now conveyed north and managed in an enlarged Rosemonte pond. Per Claire Jonson's direction, we have applied for a revised Shared Facility Drainage Adjustment. Based on our conversations with her, approval of this Adjustment is a formality, the fees providing budget with which to review/process our revision. With the elimination of the vault, we are proposing a wetland recharge strategy that will route selected roof and yard area runoff to the wetland system occupying the western portions of the project. Discharge will be accomplished via several level spreaders located such that recharge is distributed evenly along the wetland frontage. (Included in our re- submittal documents is a memo describing our recharge strategy.) You will also note minor changes to the conveyance system, connecting the East Renton system to the Rosemonte system and including some upsizing of pipe in the lower reaches of the combined system. Additionally, we have been informed that our request for a road variance to allow a thickened edge along the east side of the 148 1h A venue improvements has been denied. Accordingly, we have revised our frontage improvement plans to incorporate a standard rural shoulder and ditch section along this east side. We are proposing temporary construction easements (permanent slope easements?) on the adjacent lots to accommodate this section. Cam west is aware of their need to obtain these easements as well as permission to transition grade at the existing driveways. l!,©iDill liJ@l!l@O@(i)llD©IDO @@IDl!llll00©1DOl!l Date: April 16, 2008 /tfilAP. To: Ted Cooper c;;= King County ODES 900 Oaksdale Ave SW Renton, WA 98055-1219 12112 t15thAvenue NE Kirkland. WA 98034-6929 Job No: 01-047 4Z5.8Z1.8448 425.821.3481 fax 800.488.0756 toll free www.triadassoc.com Project: East Renton/Rosemonte · Enclosed are: [gJ Prints 0Copies D Reproducibles . D Reports D Documents D Specifications D Other These have been sent: D For Your Use [gl For Your Review I Approval 0 For YourSignaturel Return D At Your Request D For Your Records D For Your l,iformation D Other .,,9,1,111111,,, " ' 1 '• • ' llt'~i"i',-1"'~"'"""'"'"'" "I 'I"\ C ' l'"i J' '.'Cl tla..i,:........,..__ ~ ~............... ~i.li.i.Ll..J-U.J"-""~-...L.lJ_..,1.......,._._ .....ill 3 3 l .... 2 Remarks: 4/15/08 4/11/08 4/15/08 ~,'(;fl 4/9/08 · Full Size Road, Storm Drainage, Grading and Erosion Control Plans Technical Information Report Cover·Letter -Dr:~DBG.g t;;.lij we~ Wetland Recharge Memo If you have any questions or comments regarding the enclosed please contact Rick Tomkins, PE at (425)821-8448. SentBy.w /.,.;_ /J2 ,':Ja/1 eM. Ryan Administrative Assistant Copies To: Jennifer Reiner, Cam West File [l,llJooai OO@w@O@IJ)lill@lilO !il@m@mOOl!llilU / ~ I 0 King County Department of Development and Envlronmental Services Land Use Services Division Drop-Off Cover Sheet for LUSD ONLY 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 206-296-6600 ITY 206-296-7217 For alternate formats, call 206-296-6600. Drop-Off Cover Sheet for Land Use Services Division **************************** IMPORTANT ***""'*********************** PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS Project No.: LOaPQ005 / L03PD01£l> Project Name: £. Ro ntcn / Rcsemonh . FROM: --rtio,,d A'ff2-CC iotes / Ric.k.To~k",ns I Company Name/ Contact Person Telephone No: C 'td5)~1-e.44?i To: Ted C.cc,per Date Received by LUSD ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat / Plats Please specify item(s) dropped-off: Lot Line Adjustment Penmlt Please specify item( s) dropped-off: Right of Way Permit Please specify item(s) dropped-off: Clearlng / Grading Permit -Additional information requested. Please specify ltem(s) dropped-off: CX) ~ :,,: "" '"O M 0 :;o () cw (Tl fTl 0 -,., :,:,. < :JC V, -f'T1 .. !El <.n ..., Other: --~-'J..__.a .... ±toa..J<a ..... 1'-4j:J...,£""ri....__ __________________ _ 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 Zoning/Land Use Technician. Your cooperation is important. Thank you. Check out the DDES Web site at www.metrokc.gov/ddes Drop-Off Cover Sheet-LUSD Only lg-cvs-dropoff.pdf 11-03-2004 Page 1 of 1 Date: April 16, 2008 To: Ted Cooper King County ODES 900 Oaksdale Ave SW Renton, WA 98055-1219 Job No: 01-047 Project: East Renton/Rosemonte Enclosed are: [gl Prints D Copies D Reproducibles D Reports D Documents D Specifications D Other These have been sent: D For Your Use [gJ For Your Review I Approval D For Your Signature I Return D At Your Request D For Your Records D For Your Information D Other 12112 !\5th Avenue NE Kirkl<:ind, WA 98034-6929 425.821.8448 425821.3481 fax 800.488.0756 toll free www.triadassoc com 3 4/15/08 3 4/11/08 Full Size Road, Storm Drainage, Grading and Erosion Control Plans Technical Information Report 1 ..,. 2 Remarks: 4/15/08 4/lQ. MJ 4/9/08 Cover'Letter .Q; :ii....., ~ oCoo!.I:~ :*6eF Wetland Recharge Memo If you have any questions or comments regarding the enclosed please contact Rick Tomkins, PE at (425)821-8448. Sent By-@;« /.,.~ /J? ,'9'a/1 eM. Ryan Administrative Assistant Copies To: Jennifer Reiner, Cam West File ----------------11-©_lll_dl_lil_• ©-· \!/-©-· O_@_l!>_llD_©_III_O_@_@_lll_lil_lll_O_O_©_III_O_lil ___________ ----lr.. April 15, 2008 Mr. Ted Cooper Engineer I! King County DOES M.S. OAK-DE-0100 RE: East Renton and Rosemonte Plats 12112 I 15th Avenue NE Kirkland. WA 98034-6929 425.821.8448 425.821.3481 fax 800.488.0756 toll free www .triadassoc.com King County File Nos. L02P0005, L03P00!8 Triad Project No. 01-047 Subject: Road and Storm Plans re-submittal, dated 4/15/08 Dear Ted, I am writing to outline some of the changes made with this plan (and TIR) resubmittal. The most significant change is that we have eliminated the detention vault on East Renton. All East Renton drainage (less wetland recharge) is now conveyed north and managed in an enlarged Rosemonte pond. Per Claire Jonson's direction, we have applied for a revised Shared Facility Drainage Adjustment. Based on our conversations with her, approval of this Adjustment is a formality, the fees providing budget with which to review/process our revision. With the elimination of the vault, we are proposing a wetland recharge strategy that will route selected roof and yard area runoff to the wetland system occupying the western portions of the project. Discharge will be accomplished via several level spreaders located such that recharge is distributed evenly along the wetland frontage. (Included in our re- submittal documents is a memo describing our recharge strategy.) You will also note minor changes to the conveyance system, connecting the East Renton system to the Rosemonte system and including some upsizing of pipe in the lower reaches of the combined system. Additionally, we have been informed that our request for a road variance to allow a thickened edge along the east side of the 148 1 1, A venue improvements has been denied. Accordingly, we have revised our frontage improvement plans to incorporate a standard rural shoulder and ditch section along this east side. We are proposing temporary construction easements (permanent slope easements?) on the adjacent lots to accommodate this section. Cam west is aware of their need to obtain these easements as well as permission to transition grade at the existing driveways. il,©lilc!l lil@l!l@O@li)liDlillilU @@lillill!IDU©lilUlil ·-. Mr_ Ted Cooper 2 April 15, 2008 Finally, we have included some notes indicating phasing of the project. While Camwest intends to open up and perform work on the entire site, they will likely record the project in two phases: Rosemonte and Lots 1-8 (Division 1) of East Renton will be recorded first, with the remainder of East Renton (Division 2) to follow. Please let me know if you have any questions regarding this submittal. I would be happy to meet with you to clarify any point or receive your direction. Sincerely, TRIAD AS SOCIA TES Richard Tomkins, PE Principal Engineer E:\PROJECTS\O 1047\Com:spondcnccVu1isdiction\King County\Covcr letter TCoopcr 8-0415.doc . .. ,_; Page I of2 Cooper, Ted From: Rick Tomkins (rtomkins@triadassociates.net] Sent: Wednesday, April 30, 2008 2:04 PM . To: Cooper, Ted Subject: RE: East Renton & Rosemonte Plats (L07SR054) -Early Start Requirements Thanks Ted -I will discuss with Camwest and let you know what they decide. Rick From: Cooper, Ted [mailto:Ted.Cooper@kingcounty.gov] Sent: Wednesday, April 30, 2008 10:07 AM To: Rick Tomkins Cc: Pete.Dye@Kingcounty.gov; Joanne.Carlson@Kingcounty.gov Subject: East Renton & Rosemonte Plats (L07SR054) -Early Start Requirements Rick, I'm writing you this e-mail in response to your request for an early start permit for the East Renton & Rosemonte Plats (combined review Activity Number L07SR054). Please contact Joanne Carlson (206-296-7216) to set up an Activity Number to bill for the early start permit. Also ask her for the required deposit amount for this early start project. The required deposit is quite small because plan review time js billed hourly to the early start Activity Number. Notice that we don't create review budgets for earlyytart projects because they are not p__[Qject managed. The following is a general checklist of the basic components required for an Early Start Permit: Early Start Plan Review: [ J (I) Standard Cover sheet included with Title for Phased Engineering Early Start (You can abbreviate it as "P.E.E.S."). [ ) (2) List the scope of work for early start (Scope of work will vary for each project -Evaluate clearing, grading for roads, lot grading, utility installation, vault construction, offsite work). Structural work is not allowed for P.E.E.S. prjects. [ ] (3) Update the sheet index to identify all plans with updated page numbers. [ ) ( 4) Include standard ESC plan prepared in accordance with all requirements listed above for erosion and sediment control. [ ) (5) Include detailed construction sequence and identify ESC supervisor. [ ) (6) Show standard erosion control notes. [ ) (7) Show early start activity number on all plan sheets.* [ ) Please submit 3-sets of plans and a cover letter (addressed to Jim Sanders, PE) requesting this early start permit. [ ) Critlcal_path item: If a tree retention plan is required for this subdivision, it must be approved by DOES before any clearing can begin on the site. 'IMPORTANT: The Early Start Activity Number must be created by ODES staff before the project will be accepted 04/30/2008 • ··-'.J by DOES. Please feel free to contact me if you have any questions. Sincerely, Ted Cooper, P.E. Engineer/I Phone: (206) 296-7163 FAX: (206) 296-6613 E-Mail: ted.cooper@kingcounty.gov M.S. OAK-DE-0100 04/30/2008 Page 2 of2 ® 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 For alternate formats, call 206-296-6600. Drop-Off Cover Sheet for Land Use Services Division *****"""•bl:**"'*"'*"'*********"'** IMPORT ANT **********0 *************** PROJECT NUMBER AND NAME IS NECESSARY FOR ALL DROP-OFFS ProjectNo. I D;i.Pcx:::o5/L03PQ01P, • Project Name W'ii>± Rtu:rl.b.n / Rbeernc,oti, FROM '"Tvia.d Assoc\oT•b, / Ric.k.-1ombasr Company Name I Contact Person ,SJ,u,.A.i m Telephone No: {.J..Ja5)Sd/ -B<f'H?, . TO kd Cm:, y>Q C Date Received by LUSD ADDITIONAL INFORMATION REQUESTED BY KING COUNTY STAFF (please print) Short Plat/ Plats Please specify item(s) dropped-olf: Lot Line Adjustment Permit Please specify item(s) dropped-off: Right of Way Permit Please specify item(s) dropped-off: Clearing I Grading Permit -Adclitional information requested. Please specify item{s) dropped-off: PLEASE NOTE: All drop-off ilem(s) will be logged into t11e compute, unuer the project number, therefore, ii is important that the top po1iion of this form is comµle!ed.properly before you drop-off anything. Assistance in finding a project number can be provided by speaking to a Zoning/Land Use Technician. Your coopera!ion is important. Thank you. Clwck out t/Jc DOES Web site at www.metrokc.gov/ddes Drop-Off Cover St,eet-1.USD Only 11 -03·2004 Page 1 of 1 W King County Department of Development and Environmental Services 900 Oakesdale Avenue SW Renton, WA 98055-1219 Engineering Plan Review Comments Proiect Tvoe : Earll£ Start Review Date : 07/30/2008 Proiect #Isl: L02P0005 & L03P0018 Review No: 1 Proiect Name : East Renton & Rosemont Plats . . . ttt .. 1 • L08SR025 . I i:,,v• /2061296-6613 T!Ror SWDM Item Sub Plan orKCRS Item Sheet(s) Reference Review Comments . I No Tree Retention and/or Soils Amendment Plans are required, per Bruce EnQell's 6-19-2008 e-mail. 2 TIR Submit 3-sets of each of the followine to insert into the 3-TIR's: TIR& D.4.5.2, Submit all specifications and calculations for the pond, its affected pgs D-28 overflows and orifices. Since flow control is required now and the A plans &D-29 permanent pond is being built now, it makes more sense to install the permanent FROP-T and orifices in CB 45 now. The pond & orifice calculations look OK for the permanent pond. Also update the olans. TIR& Fig 5.3.4A As designed, a minimum 21 "-diameter riser (with no more than 0.5' affected pg 5-50 & head) is required because this riser must be designed to convey the B plans pg. 5-29 100-year flows before the pond's emergency overflow weir starts to function. See the required overflow sequence in Sections A-A & C C. Also uodate the olans. TIR& Fig 5.3.IB In the control structure, minimum 3 .8' (SAY 4.0'?) -wide jailhouse C affected pg. 5-29 weir is needed.The proposed 3.5'-width minus 11-#5 bars doesn't plans provide your minimum 3.2' -calcul_ated width. Also update the olans. D TIR Reference Submit bond quantity worksheets, an RID facilities summary 8-C & 8-D worksheet with the sketch. 3 1, 5 D.5.4, pgs Specify the name & phone number of the ESC Supervisor (per D-43,D-44 reQuirements for "hiQh)v sensitive sites). Tbl.4.2.2A For all pipe outfalls, the "TEMPORARY SUMP" and the 4 4, 5 Fig.4.2.2B pond/sediment trap emergency overflow spillways add rip rap pad (pgs 4-28 dimensions and material specifications per this table and figure. & 4-30) 5 5 Resolve the following conflicting pipe sizes for the northernmost sediment trap (6" nine that has a 12" oioe invert\. Reviewer: Ted Cooner Email : Ted.Coooer"''kinncountv.nov Phone: 12061 296-7163 c.-, .. · Ted Cooner Item Resolved? Consultant Resnonse ---. . . IY or NI T!Ror SWDM Item Item Sub Plan orKCRS Resolved? Item Sheet(s) Reference Review Comments Consultant Resnonse IV or M Modify the note stating, "TEST PIT (TYP)" so it says "TEST PIT 6 4, 5 REFERENCED IN GEO. REPORT (TYP)" because it is ambieuous to the LUIS reviewer (and nossibly others). Correct the contour lines at the inlets and outlets of all culverts. 7 4, 5 Check ALL proposed pipes and make the changes needed to ensure all of them have 1'-minimum nine cover. Label the two buffer lines at the edge of the wetland for clarity. 8 4, 5 Nick Gillen is responsible for approving these buffer lines and any clearine nronosed within them (e.e., adiacent to Lot 76). Fig.5.3.1.C For CB 46, use a birdcage on a minimum 54"-diameter TYPE 2 CB 9 5 to 10 (pg 5-30) with an at grade rip rap blanket surrounding it. Also specify that it is to be field located. A Type IL CB can't be used as proposed (non standard\. Adjacent to the 6'-wide ACP emergency spillway, show and specifS the rip rap to be as wide as this weir (i.e., bottom plus side slopes). 10 5 to 10 Also extend the rip rap from this weir downstream and fan it outward to a reasonably level spot ( even if it is sllightly in the wetland buffer) so erosion won't occur. II 8, 9 In the "STORM DRAIN OUTFALL FROM POND" profile, make the following changes: A 8, 9 Geo.report Add a note specifying that backfill over the pipe in the berm must & no 5-20 be 95% of Modified Proctor ner SWDM. B 8,9 Geo.report Show the required embankment key per the SWDM and the & no 5-20 0 eotechnical renort. C 8, 9 Correct the profile location of the control structure (CB 45) so it matches its olan view location. 12 5 to IO Since you propose to install the pond's permanent liner now, we hiehlv recommend the followine: Install all permanent pipes and structures that will extend through A 5 to 10 the pond liner now because it will be difficult and costly to instally them later. Omit the temporary sediment pond riser proposed inside of the B 5 to 10 pond and use the permanent riser in the control structure instead (to avoid tearin• and later renairino the nond liner). 15 8 Resolve the followine nond liner issues: Show the pond liner in all pond cross sections and details of its A installation. Clearly show and specify the required I'- overexcavation, the backfill (plus its specifications) over the liner and all reauired nlantines. In the geotechnical detail, the pond liner is shown above the top B elevation of the pond's internal 3:1 slopes. This isn't OK. Fill will slide down the oond liner where slones exceed 3: I. TIRor SWDM Item Item Sub Plan orKCRS Resolved? ' ... Item Sheet(s) Reference Review Comments Consultant Resnonse /Y or Nl 16 6 Change the construction sequence as follows: A 6 Remove the word "Recommended" from the headine. B 6 Make the first step say "Schedule a pre-construction conference with the DDES site inspector bv calling (206) 295-6642". SWDM 5-Correct the bollard locations and spacing per SWDM & KCRS. 17 10 22, KCRS Locate faces of fixed bollards at edges of access road. Locate 2- 5-013 removable ones at eciual soacing between fixed ones. 18 8,9 SWDM Design and completely specify the pond embankments per the Pe 5-20 "Embankments" section. 19 5 to 10 SWDM pesign and completely specify the pond fencing and setbacks per Pg 5-22 & SWDM. Embankment fill can't be placed in the ROW of Early Start Permits (see Pond Section A-A). This isn't shown in plan view contours 20 9 (i.e., a contradiction). Note that roadway embankment concerns must be addressed (but this is part of final plan review/approval). TIRor SWDM . Item Item Sub Plan orKCRS Resolved? Item Sheet(s) Reference Review Comments Consultant Resoonse (Y or N) . TIRor SWDM Item Item Sub Plan orKCRS Resolved? Item Sheet(s) Reference . Review Comments Consultant Resoonse (Y or N) Cooper, Ted From: Sent: To: Cc: Subject: Attachments: Rick and Jennifer, Cooper, Ted Wednesday, July 30, 2008 4:44 PM 'Rick Tomkins'; 'Jennifer Reiner' Jeff Pray (Jeff.Pray@Kingcounty.gov); Pete Dye (Pete.Dye@Kingcounty.gov) L08SR025 East Renton/Rosemonte Early Start L08SR025 List#1.xls My review comments for this early start are in the attached list below. Jeff Pray's comments have been integrated into this list too. Notice that Nick Gillan's approval is needed for this project and he is on vacation until 8-12-2008. ~ L0SSR02S Llst#l.xls (44 KB) For each item on this list, please add your comments to the "Consultant Response" section of this spreadsheet. If you have any questions please contact me. Sincerely, Ted Cooper, P.E. Engineer/I Phone: (206) 296-7163 FAX: (206) 296-6613 E-Mail: ted.cooper@kingcounty.gov M.S. OAK-DE-0100 1 ® King County Road Services Divisic;,n Department of Transportation KSC-TR-0222 201 South Jcckson Street Seattle, WA 98104-3856 October 31, 2007 Roy Lewis 12112-I 15th Avenue NE Kirkland, WA 98034 RE: Road Variance L07V0082 East Renton/Rosemonte -Related File L03POOl 8 Dear Mr. Johnson: Thank you for your application for variances from the 1993 King County Road Standards (KCRS). You requested variances from Section 2.12 concerning the stopping sight distance (SSD) in hours of darkness for three proposed sag vertical curves. You demonstrated that the three sag vertical curves can be adequately illuminated to provide KCRS SSD. I approve a variance to allow the three sag curves with illumination to provide KCRS SSD. The curves are at STA 6+85 of SE I 19th Street, STA 25+55 of 146th Avenue SE, and STA 16+00 of 147th Avenue SE. The Department of Development and Environmental Services will review the plan details on the illumination. This decision applies only to KCRS identified in the variance request. All other design requirements in the KCRS and other regulations, such as surface water management and zoning, must still 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). This variance decision is valid for one year from date ofletter unless an associated land use permit is pending or submitted within the one year period. In these cases, the variance decision is valid for the duration of the permit processing. ·- Roy Lewis October 31, 2007 Page 2 A copy of staffs 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, ~/"-~~ ~OV' Paulette Norman, P.E. County Road Engineer PN:CC:kc Enclosure cc: James Sanders, P.E., Development Engineer, Land Use Services Division (LUSD), DOT Department of Development and Environmental Services (DOES) Pete Dye, P.E., Senior Engineer, LUSD, DOES Linda Dougherty, Division Director, Road Servic.es Division (RSD), Department of Transportation (DOT) Matthew Nolan, P .E., County Traffic Engineer, Traffic Engineering Section, RSD, DOT Fatin Kara, P .E., Supervising Engineer, Traffic Engineering Section, RSD, DOT Kris Langley, Senior Engineer, Traffic Engineering Section, RSD, DOT Craig Comfort, P .E., Road Variance Engineer, Traffic Engineering Section, RSD, ,. . ® King County Road Services Division Department of Tran!lportation Traffic Engineering Section MS KBC·TR·0222 201 South Jo.ckton St.n,et Seattle, WA 98104 October 31, 2007 TO: Variance File FM: Craig Comfort, PE., Road Variance Engineer, Traffic Engineering Section RE: Road Variance L07V0082 -East Renton/Rosemonte -Related File L03POO 18 Applicant's Presentation: I. The East Renton/Rosemonte Plat is for 91 lots fronting the west side of 148th Avenue SE at SE I 19th Street. Variances are requested to illuminate three sag vertical curves, one on a subcollector street, and another two on subaccess streets. Illumination is proposed to mitigate for deficient nighttime stopping sight distance (SSD) for the SO-foot vertical sag curve at STA 6+85 on SE I 19th Street, a subcollector. Illumination is proposed to mitigate for the SSD on a proposed SO-foot sag curve at STA 25+55 on 146th Avenue SE. Illumination is proposed to mitigate for the SSD on a proposed 149-foot sag curve at STA 16+00 on 147th Avenue SE. 2. The proposal with the sag curves illuminated will be safe and comparable to the King County Road Standards. Staff's Findings and Conclusions: I. Concurrence with the applicant's presentation. 2. The American Association of State Highway and Transportation Officials' manual comfort in riding criteria were met for the anticipated vehicular speeds through the sag curves. y ,.I j @ king County Road Services Division Department of Transportation KSC-TR-0222 201 South Jackson Street Seattle, WA 98104-3856 October 31, 2007 · Roy Lewis 12112 -115th A venue NE Kirkland, WA 98034 RE: Road Variance L07V0082 East Renton/Rosemonte -Related File L03P0018 Dear Mr. Johnson: Thank you for your application for variances from the 1993 King County Road Standards (KCRS). You requested variances from Section 2.12 concerning the stopping sight distance (SSD) in hours of darkness for three proposed sag vertical curves. You demonstrated that the three sag vertical curves can be adequately illuminated to provide KCRS SSD. I approve a variance to allow the three sag curves with illumination to provide KCRS SSD. The curves are at STA 6+85 of SE 119th Street, STA 25+55 of 146th Avenue SE, and STA 16+00 of 147th Avenue SE. The Department of Development and Environmental Services will review the plan details on the illumination. This decision applies only to KCRS identified in the variance request. All other design requirements in the KCRS and other regulations, such as surface water management and zoning, must still 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). This variance decision is valid for one year from date of letter unless an associated land use permit is pending or submitted within the one year period. In these cases, the variance decision is valid for the duration of the permit processing. @•~1202M. Roy Lewis October 31, 2007 Page 2 A copy of staffs 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, ~av--a~ foy, Paulette Norman, P.E. County Road Engineer PN:CC:kc Enclosure cc: James Sanders, P.E., Development Engineer, Land Use Services Division (LUSD), DOT Department of Development and Environmental Services (DDES) Pete Dye, P.E., Senior Engineer, LUSD, DOES Linda Dougherty, Division Director, Road Services Division (RSD), Department of Transportation (DOT) Matthew Nolan, P.E., County Traffic Engineer, Traffic Engineering Section, RSD, DOT Fatin Kara, P .E., Supervising Engineer, Traffic Engineering Section, RSD, DOT Kris Langley, Senior Engineer, Traffic Engineering Section, RSD, DOT Craig Comfort, P.E., Road Variance Engineer, Traffic Engineering Section, RSD, J . .. ® King County Road ServiC8s Division Department of Trnm1portation Traffic Engineoring Section MS KSC·TR·0222 201 South Jackaon Street Seattle, WA 98104 October 31, 2007 TO: Variance File FM: Craig Comfort, P.E., Road Variance Engineer, Traffic Engineering Section RE: Road Variance L07V0082 -East Renton/Rosemonte -·Related File L03POOl8 Applicant's Presentation: I. The East Renton/Rosemonte Plat is for 91 lots fronting the west side of 148th Avenue SE at SE I 19th Street. Variances are requested to illuminate three sag vertical curves, one on a subcollector street, and another two on subaccess streets. Illumination is proposed to mitigate for deficient nighttime stopping sight distance (SSD) for the 50-foot vertical sag curve at ST A 6+85 on SE I 19th Street, a subcollector. Illumination is proposed to mitigate for the SSD on a proposed 50-foot sag curve at ST A 25+55 on 146th Avenue SE. Illumination is proposed to mitigate for the SSD on a proposed 149-foot sag curve at ST A 16+00 on 147th Avenue SE. 2. The proposal with the sag curves illuminated will be safe and comparable to the King County Road Standards. Staff's Findings and Conclusions: I. Concurrence with the applicant's presentation. 2. The American Association of State Highway and Transportation Officials' manual comfort in riding criteria were met for the anticipated vehicular speeds through the sag curves. King County Department of Development and Environmental Services Land Use Services Division Web Date· 09/28/2005 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 206-296-6600 TIY 206-296-7217 For alternate formats, call 206-296-6600. Project Name: East Renton/Rosemonte Project Address and Parcel Number: 1023059390/1023059023 Applicant/Design Engineer Name: Cam West I Rebecca Cushman Address: 12112115'" Ave NE City, State, ZIP: Kirkland, WA 98034 gin ri Name: Triad Associates Telephone: 425 821-8448 ODES Engineer Initials: D Route Application to LUIS D Check here if project engineering plans are approved and construction has begun. INSTRUCTIONS TO APPLICANT/DESIGN ENGINEER: Date: ¥15-07 Please be sure to include all plans, sketches, photos and maps which may assist in complete review and consideration of your variance request. For a complete list of road variance submittal requirements, refer to separate list from DOES. Failure to provide all pertinent information may result in delayed processing or denial of request. Please submit this request and applicable fee to the Department of Development and Environmental Services (ODES) Permit Center at 900 Oakesdale Ave. SW, Renton, WA 98055-1219. To make an appointment for permit submittal, please call 206-296-6797. For more information, refer to the ODES Web site, www.metrokc.gov/ddes. !1*\"·§j_it1}'f!Rl:f'.EB 'l'.Q;'.seC,:idN' 1:os10F:'THE;K/1Y.G'¢0/!JJ.,I~ RO);DJST#Nl!ARDS'"'bR1V'.6:RIANCE$: • '';:.,,'.!J*:"!j DESCRIPTION OF VARIANCE REQUEST: Intersection Stopping_ Sight_ Distance_: Illumination on a Sag Curve. APPLICABLE SECTION(S) OF STANDARDS: 1993 KC Road Standards 2.12C and D. JUSTIFICATION (see attachments, pages see attached AUTHORIZATION SIGNATURES: ____ to ___ ): DOES STAFF R1i:COMMENDATION DEPARTMENT OF TRANSPORTATION AUTHORIZATION ~llf'{ JtJ/f~ i//ifffltfJef/8? Jr f,t; turlli7, 0 A roval O Conditioned A roval O Denied County Design Engineer: Date Development Engineer/Designe County Road Engineer: Date CONDITIONS OF APPROVAL: . Re~ut the DOES Web site at www.metrokc.gov.c · RoadSta~s~q'?z5_yd,lJJ \l1J 8 2e-req-rdvar.pdf 09/28/2005 Page 1 of 1 K.C. 0.0.E.S ® King County Department of Development and Environmental Services Land Use Services Division 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 206-296-6600 TIY 206-296-7217 Project Name: East Renton/Rosemonte Project Address and Parcel Number: 1023059390/1023059023 Applicant/Design Engineer Name: Cam West I Rebecca Cushman Address: 121121151h Ave NE City, State, ZIP: Kirkland, WA 98034 ., Web Date: 09/28/2005 ROAD STANDARDS VARIANCE REQUEST TO THE COUNTY ROAD ENGINEER For alternate formats, call 206-296-6600. Date: ¥, /),{} 7 Telephone: 425 821-8448 DDES Engineer Initials: D Route Application to LUIS D Check here if project engineering plans are approved and construction has begun. INSTRUCTIONS TO APPLICANT/DESIGN ENGINEER: Please be sure to include all plans, sketches, photos and maps which may assist in complete review and consideration of your variance request. For a complete list of road variance submittal requirements, refer to separate list from DOES. Failure to provide all pertinent information may result in delayed processing or denial of request. Please submit this request and applicable fee to the Department of Development and Environmental Services (DOES) Permit Center at 900 Oakesdale Ave. SW, Renton, WA 98055-1219. To make an appointment for permit submittal, please call 206-296-6797. For more information, refer to the DOES Web site, www.metrokc.gov/ddes. i·: 1 / :1 ':1:t·~,l % REFER 'rO'.!SECTION!~ .osro~Tl!tE'.'K!NG:coJ.JN1i.YiR(fA1D1St!A'NDARC)S/FfOR'V ARIANCES' ' ,,:,j DESCRIPTION OF VARIANCE REQUEST: Intersection Stopping Sight Distance: Illumination on a Sag Curve. APPLICABLE SECTION(S) OF STANDARDS: 1993 KC Road Standards 2.12C and D. JUSTIFICATION (see attachments, pages see attached AUTHORIZATION SIGNATURES· ---): ODES STAFF RECOMMENDATION DEPARTMENT OF TRANSPORTATION AUTHORIZATION D Annroval D Conditioned Annroval D Denied County Design Engineer: Date Development Engineer/Designee: Date County Road Engineer: Date CONDITIONS OF APPROVAL: o~©~~w~~ -· n UL .~ __,, " . AUL, ? 2 2007 t Web site at www.metrokc.gov/ddes RoadStandardLe(~ltldo oo~rdvar.pdf 09/28/2005 K.C. D.D.E.S. Page 1 of 1 August 15, 2007 Craig Comfort King County Department of Transportation Road Services Division Traffic Engineering Section 201 S. Jackson Street MS KSC-0231 Seattle, WA 98104-3856 RE: East Renton/Rosemonte King County Project# L02P0005 (Triad Job No. 01-047) Dear Craig: 12112 I 15th Avenue NE Kirkland. WA 98034-6929 425.821.8448 425.821.3481 fax 800.488 0756 toll free www triadassoc.com Please review the enclosed variance for three illuminated sag curves, one on a sub-collector street and two on sub-access streets. This request is to approve an adjustment to the 1993 King County Road Standards section 2.12C and D. To assist in the review of the adjustment request, please see the enclosed exhibits. SE 1191h Street is a sub-collector road serving homes within the proposed development and with a design speed of 30 mph. The sag curve in question is located between Sta. 6+85 to 7+ 35 (50 feet). By calculation, the minimum length of curve required would be 244 feet using an intersection stopping site distance of 125 feet at the "T" intersection of SE 119'" Street and 145'" Ave SE. Due to topographical grading constraints of the site, a comfort curve of 50 feet has been provided. Illumination is proposed at this intersection to provide nighttime stopping sight distance mitigation. 146th Avenue SE is a sub-access road with a design speed of25 mph. The sag curve in question is between Sta. 25+55 to 26+05 (50 feet). By calculation, the minimum length of curve required would be 140 feet utilizing an intersection stopping site distance of 125 feet for the intersection of SE 1191h Street and 1461h Ave SE. Due to topographical grading constraints of the site, a 50 foot comfort curve has been provided at this intersection. Illumination is proposed to provide nighttime stopping sight distance mitigation. 147'" Avenue SE is a sub-access road with a design speed of25 mph. The sag curve in question is between Sta. 16+00 to 16+50 (50 feet). By calculation, the minimum length of curve required would be 149 feet utilizing an intersection stopping site distance of 125 feet for the intersection of SE 119'" Street and 147'h Ave SE. Due to topographical grading constraints of the site, a 50 foot comfort curve has been provided at this intersection. Illumination is proposed to provide nighttime stopping sight distance mitigation. Please let me know if you require any further information for your consideration of this request. Sincerely, Project Engineer Cc: Cam West, Jennifer Reiner ll.©llldl liJ@l!i@O@(j)liD@lllO @@lll!!!mOO©IIJO!!! I I I I \ l-i/\l.J,J$~3ti.l. t I :v,XJ5~™ . =========C,J1lft I ... L ___ , ·~· KING COUNTY PARCEL MAP EAST RENTON /ROSEMONTE KING COUNTY, 6/25/07 WASHINGTON Jos#Ol-047 I • • i1 3 ~/ POR OF THE NE 1/4 OF THt: SE 1/4 & THE SE 1/4lOF THE NE 1/4, ALL IN SEC. 10, TWP. 23 N., RGE. 5 E., W.M. , t r(t' . . ' '~., SOOl,.,~.1"', ',' ' -i,~" l>t tf ·le , ivl ittri i I / I ,, • • J . i i I : ---______ _]_ +· I-, j ' l ' I . " ---•---·--;-··---t .............. r······~\J! ,,to I I i • :b , •,: i I · L _____ L!-: ____ ----I t' 1 , • -~=.-I --------!··-·--·-, 600 , 1 ---, I , , ' ! : i l i . ',, I f ! -• ---0 -•••••••• !...... . .............. 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ICNO ccurrv D.D.E.s. ........ --......... -- ~~ ---- OZ0011111AD~· Lr~ 1Z11211MI-NE -~-.,..., .... cuz1.-.ik -------- , I •' ,~!~"ti ... :::! ~ :!: ~ l ~ c:, ill I:! II) §l ~ c:, ~ " "'- I § ~ ~ m .. (fj ~Q ~ Ill!:: ~' ~ .. ~ [3" : a,.;, ~~ ~ e,... ~ ~ ~ " "' i!; fi ~ ,: .. § 8 .. ~ i!= ~,l'L--~ r::ftz.: ~ t.iil,,i.r.H'rn, fllS1' ltlllllffllL Nfl:J( IIICUI: -.Cf~ 'ISal•-,• .....,, ..... VlUSS SIGIIII W mlD .... 01-047 _, .. 12 .. 22 ... Permit ~pplication Report -DDring County, Washington l.'1 King County llmfilil llmllll 41Afiiii4¥ Commt;nt~ e ;;.;;,w Department of Development and En~lrronmental, Services • 0 DES Homepage Online Permit Applications Report 3 Search Results for File No: I03p001S Reported through: August 9, 2007 A/p/0 No Permit Urban P . 1 T"tl JD . 1. Type Rural roiec I e escnp 10n Applied Status Page I of I Applicant A02P0249 FEASBL TY URBAN NORTHWARD HOMES 10/02/2002 COMPLETE NORTHWARD HOMES-PATF L03P0018 PRE-PLAT URBAN ROSEMONTE FKA IRONWOOD 06/10/2003 PRELAPPR CAMWEST EAST RENTON L L06V0042 ROAD-VAR URBAN ROSEMONT PLAT L03P0018 04/24/2006 GRANTED CAMWEST DEVELOPMENT, List Date: August 17, 2007 King County DOES I New AQQlication Search I News I Services I Comments I 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 tenns and conditions of the site. The details. 1DJ~©~OW~[g) m} AUG 2 2 2007 K.C. D.D.E.S. http://appsOl.metrokc.gov/www6/ddes/scripts/permlist.cfm 8/17(2007 Permit Application Report -DDr King County, Washington . \- ~·KingCounty llllfflmll m C14di44M ... H5¥ik9,M Department of ii>evetopmen.t and env:lronmel'ltal, SeNlces ~ ODES Homepage Online Permit Applications Report 5 Search Results for File No: 102p0005 Reporled through: August 9, 2007 Page I of I A/p/D No Permit Urban P . t T'tl ID . 1. Type Rural ro1ec I e escnp 10n Applied Status Applicant A01 P0071 FEASBL TY URBAN PRE PLAT PRE-APPL L02P0005 PRE-PLAT URBAN EAST RENTON L02V0089 SWM-VAR URBAN EAST RENTON SWM VAR !.,03RE027 REV-PLAT URBAN EAST RENTON 03/28/2001 COMPLETE CAM WEST DEVELOPMENT 04/03/2002 PRELAPPR CAM WEST DEVELOPMENT 10/09/2002 GRANTED CAMWEST DEVELOPMENT, 07/11/2003 CANCELED CAMWEST DEVELOPMENT, L04V0103 SWM-VAR URBAN EAST RENTON PLAT L02P0005 11/30/2004 GRANTED CAM WEST DEVELOPMENT List Date: August 17, 2007 King County DOES I New AP-plication Search I News I Services I Comments I 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. http://apps0J.metrokc.gov/www6/ddes/scripts/permlist.cfm 8/17/2007 Permit Application Report -ODES-King County, Washington " ti King County I OOfumi 11 ®#iii 11 t'lf!il'nrl*' 11 ca.,,,,,,.9,rm 11 i¥ii® Department of Development and Environmental Services > DD ES Homepage Online Permit Applications Report 3 Search Results for File No: l03p0018 Reporled through: August 9, 2007 A/p/D No Permit Urban P . 1 T"tl ID . 1. Type Rural roiec I e escnp 10n Applied Status Page I of I Applicant A02P0249 FEASBL TY URBAN NORTHWARD HOMES 10/02/2002 COMPLETE NORTHWARD HOMES-PATF L03P0018 PRE-PLAT URBAN ROSEMONTE FKA IRONWOOD 06/10/2003 PRELAPPR CAMWEST EAST RENTON L !c06V004? ROAD-VAR URBAN ROSEMONT PLAT L03P0018 04/24/2006 GRANTED CAMWEST DEVELOPMENT, List Date: August 17, 2007 King County ODES I New ARRlication Search I News I Services I Comment$. I Sear~h 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. http://appsO l .metrokc.gov/www6/ddes/scripts/permlist.cfm 8/17/2007 Permit Application Report -DDES. King County, Washington ti Ki~g County I GOm:ml 11 ~ 11 ifuiief•$fi I l<s•h,111rn,w 11 ifui®/\i Department of Development and Environmental Services • DOES Homepage Online Permit Applications Report 5 Search Results for File No: 102p0005 Reported through: August 9, 2007 AIPID No Permit Urban P . 1 T"tl ID . 1. Type Rural roiec I e escnp 10n Applied Status Page I of I Applicant A01 P0071 FEASBL TY URBAN PRE PLAT PRE-APPL L02P0005 PRE-PLAT URBAN EAST RENTON l..02VQQ_ll9 SWM-VAR URBAN EAST RENTON SWM VAR L03REQ27 REV-PLAT URBAN EAST RENTON 03/2812001 COMPLETE CAM WEST DEVELOPMENT 0410312002 PRELAPPR CAM WEST DEVELOPMENT 10109/2002 GRANTED CAMWEST DEVELOPMENT, 07/11/2003 CANCELED CAMWEST DEVELOPMENT, L04V0103 SWM-VAR URBAN EAST RENTON PLAT L02P000511/30/2004 GRANTED CAM WEST DEVELOPMENT List Date: August 17, 2007 King Count¥ DOES I New Application Search I News I Services I Comments I 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. http://apps01.metrokc.gov/www6/ddes/scripts/permlist.cfm 8/17/2007 Permit Application Report -DOES, King County, Washington ±3¥H3,M Depsriment of Oevelopmen.t and Enuhronmental, sa,,,lcces • 0 DES Homepage Online Permit Applications Report 3 Search Results for File No: I03p0018 Reported through: August 9, 2007 A/p/D No Permit Urban p . t T"tl ID . 1. Type Rural roJec I e escnp 10n Applied Status Pagel of l Applicant A02P0249 FEASBL TY URBAN NORTHWARD HOMES 10/02/2002 COMPLETE NORTHWARD HOMES-PATF L03P0018 PRE-PLAT URBAN ROSEMONTE FKA IRONWOOD 06/10/2003 PRELAPPR CAMWEST EAST RENTON L L06V0042 ROAD-VAR URBAN ROSEMONT PLAT L03P0018 04/24/2006 GRANTED CAMWEST DEVELOPMENT, List Date: August 17, 2007 King County DOES I New AQQlication Search I News I Services I Comments I SeaJ_Qh 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. http://apps0l.metrokc.gov/www6/ddes/scripts/permlist.cfm 8/17/2007 Permit Application Report -DOES, King County, Washington i•fil . 11f1 Klngeounty ~ l!al 111111111 C14dt44-I COmnlents e ;;;;;,w DGpall'tment of Development and &nv.lronmental, SeNleu ., ODES Homepage Online Permit Applications !Report 5 Search Results for File No: 102p0005 Reported through: August 9, 2007 A/p/D No Permit Urban P . t T'tl ID . t· Type Rural ro1ec I e escrip 10n Applied Status Page 1 of 1 Applicant A01 P0071 FEASBL TY URBAN PRE PLAT PRE-APPL L02P0005 PRE-PLAT URBAN EAST RENTON L02V0089 SWM-VAR URBAN EAST RENTON SWM VAR J_03RE027 REV-PLAT URBAN EAST RENTON 03/28/2001 COMPLETE CAM WEST DEVELOPMENT 04/03/2002 PRELAPPR CAM WEST DEVELOPMENT 10/09/2002 GRANTED CAMWEST DEVELOPMENT, 07/11/2003 CANCELED CAMWEST DEVELOPMENT, L04V0103 SWM-VAR URBAN EAST RENTON PLAT L02P0005 11/30/2004 GRANTED CAM WEST DEVELOPMENT List Date: August 17, 2007 King County ODES I New Application Search I News I Services I Comments I 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 tenns and conditions of the site. The details. http://apps0 l .metrokc.gov/www6/ddes/scripts/permlist.cfm 8/17/2007 April 10, 2007 OFFICE OF THE HEARING EXAMINER REPORT AND DECISION KING COUNTY, WASHINGTON 400 Yesler Way, Room 404 Seattle, Washington 98104 Telephone (206) 296-4660 Facsimile (206) 296-1654 Email: hearex@metrokc.gov SUBJECT: Department of Development and Environmental Services File No. L03P0018 Proposed Ordinance no. 2007-0011 Location: Applicant: cc,-.ROSEMONTE Preliminary Plat Application West of 148th Avenue Southeast at approximately Southeast 11 7th Street, Renton Cam West Real Estate Dev., Inc. represented by Robert Johns, Attorney Johns Monroe Mitsunaga 1601 -I 14th Ave. SE,# 110 Bellevue, Washington 98004 Telephone: (425) 467-9960 Facsimile: ( 425) 451-2818 King County: Department of Development and Environmental Services (ODES) represented by Karen Scharer 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 Telephone: (206) 296-7114 Facsimile: (206) 296-7051 SUMMARY OF RECOMMENDATIONS/DECISION: Department's Preliminary Recommendation: Department's Final Recommendation: Examiner's Decision: EXAMINER PROCEEDINGS: Approve subject to conditions Approve subject to conditions (modified) Approve subject to conditions (modified) Hearing Opened: March 22, 2007 Continued for Administrative Purposes: March 22, 2007 Hearing Closed: fo) l2 (C; l2 Q W/ l2 [;\March 23, 2007 The public hearing on the proposed subdivision of Rosemont.trrs·conducted concurrr§J with the J1 (0) 1 WI (0) (0) § 2 AUG 2 2 :007 K.C. D.D.E.S. L03POO J 8~Rosemonte 2 public hearing on the proposed.subdivision of East Renton (DOES File No. L02P0005). Participants at the public hearing and the exhibits offered and entered arc listed in the attached minutes. At 12:31 p.m. the hearing was continued for administrative purposes, to allow for the submission of proposed exh. no. 29, providing proposed text for modifications to the department's recommended conditions. Exhibit 29 was received by the Hearing Examiner on March 22, 2007, and the hearing was declared closed on March 23, 2007. A verbatim recording of the hearing is available in the office of the King County Hearing Examiner. ISSUES AND TOPICS ADDRESSED: Recreation area Wetland buffers • Surface water drainage SUMMARY: Red-tailed hawks nest Safe walking conditions The proposed subdivision of 9.35 acres into 25 lots in the urban area is approved subject to conditions. FINDINGS, CONCLUSIONS & DECISION: Having reviewed the record in this matter, the Examiner now makes and enters the following: FINDINGS: I. General Information: Developer: Engineer: STR: Location: Parcel: Zoning: Acreage: Number of Lots: Density: Lot Size: Proposed Use: Sewage Disposal: Water Supply: Camwest Real Estate Development, Inc. 9720 NE 120 11 ' Place, Suite I 00 Kirkland, WA 98034 Contact: Sara Slatten 425-825-1955 Triad Associates 12112115'"AveNE Kirkland, WA 98034 Contact: Gerry Buck 425-821-8448 I 0-23-05 West of 148'h Ave SE and south of SE! 17•h St., if extended ~059395) R-4 9.35 acres 25 Approximately 2.6 units per acre Approximately 5,300 square feet in size Single Family Detached Dwellings City of Renton Water District # 90 L03 POO 18-Rosemonte Fire District: School District: City of Renton Issaquah School District Complete Application Date: July 8, 2003 3 2. Except as modified herein, the facts set forth in the King County Land Use Services Division's preliminary report to the King County Hearing Examiner for the March 22, 2007, public hearing are found to be correct and are incorporated herein by this reference. The LUSD staff recommends approval of this subdivision, subject to conditions. 3. Development of this subdivision may affect, and lead to the abandonment of, a red-tailed hawks nest on the adjacent property to the south (proposed subdivision of East Renton). The red-trailed hawk is not an endangered or threatened species, and no protection of the red-tailed hawk is afforded by law or the King County Code within the designated urban area of King County. 4. The applicant has submitted a revised recreation plan for this subdivision and the adjacent plat of East Renton ( exh. no. 26). This plan would provide adequate area within Tract B, a trail adjacent to proposed lot 11, and within Tracts C, G and E and a proposed trail in the adjacent plat of East Renton, to serve these plats jointly with well conceived amenities for recreation and open space, consistent with the requirements of the King County Code. To the extent that a portion of the recreation area necessary to meet the requirements for this plat is located on the East Renton Plat property, that variation from KCC 21 A.14.180 can be corrected by boundary line adjustment or recording the two plats as a single plat, ifDDES detennines that it is necessary to do so. 5. Wetland buffers within this subdivision will need to be modified, utilizing the buffer averaging provisions of the critical areas code, to accommodate the proposed alignment of 145th Avenue Southeast in the vicinity of the south property line. 6. The proposed subdivision will provide for safe walking conditions for students who will walk to Apollo Elementary School on southeast I 17th Street by constructing urban improvements to 148th Avenue Southeast from the plat to Southeast I 17th Street. A school crosswalk (crossing 148th Avenue Southeast) is located on the north side of Southeast I 17th Street, where an existing walkway is used by students to travel along the north side of Southeast I 17th Street, east from 148th Avenue Southeast to the school. This crosswalk also serves students walking from the area north of Southeast I 17th Street. Consequently, the crosswalk should be maintained north of Southeast I 17th Street, unless it is physically impractical to do so because of constraints resulting from the topography within the right-of-way for 148th Avenue Southeast, south of Southeast I 17th Street. If those constraints preclude extending curb, gutter and sidewalk from this plat to the north side of Southeast 11 7th Street, the crosswalk can be relocated to the south, and improvements made on the east side of 148th Avenue Southeast extending north from the relocated crosswalk to Southeast I 17th Street. 7. The conceptual review of drainage plans has shown that there are no downstream impacts likely to occur from development of the subject property if Level I flow control and basic water quality treatment improvements are designed and constructed in accordance with the 1998 King County ) L03POO 18-Rosemonte 4 Drainage Manual. The final drainage plan will include calculations to assure that the capacity of drainage facilities and discharge rates will be consistent with those flow control standards. CONCLUSIONS I. If approved subject to the conditions recommended below, the proposed subdivision will comply with the goals and objectives of the King County Comprehensive Plan, subdivision and zoning codes, and other official land use controls and policies of King County. 2. If approved subject to the conditions recommended below, this proposed subdivision will make appropriate provision for the public health, safety and general welfare, and for open spaces, drainage ways, streets, other public ways, transit stops, potable water supply, sanitary waste, parks and recreation, playgrounds, schools and school grounds and safe walking conditions for students who only walk to school; and it will serve the public use and interest. 3. The conditions for final plat approval recommended below are in the public interest and are reasonable and proportionate requirements necessary to mitigate the impacts of the development upon the environment. 4. The dedications of land or easements within and adjacent to the proposed plat, as required for final plat approval or as shown on the proposed preliminary plat submitted by the Applicant on March 31, 2006 and the conceptual recreation plan submitted March 22, 2007 (exh. 26), are reasonable and necessary as a direct result of the development of this proposed plat, and are proportionate to the impacts of the development. 5. No provisions are required to be made by this subdivision for the protection of the red-tailed hawks nest(s) on the site. 6. The proposed conceptual recreation plan submitted as exh. no. 26 is a reasonable and appropriate plan to serve the plats of East Renton and Rosemonte jointly. Minor alterations may be made in the final design and review by DOES, and boundary adjustments, if necessary, may be made to comply with provisions of KCC 21 A.14.180-200. 7. Revisions to the wetland buffers will be necessary to comply with the provisions of the King County Critical Areas Code, to permit construction of 145th Avenue Southeast in the vicinity of the south property line. 8. In order to provide for safe walking conditions for students walking from this development to Apollo Elementary School, urban improvements must be made to 148th Avenue Southeast north from the proposed plat to the north side of Southeast I 17th Street. These improvements should be made to the west side of 148th Avenue Southeast to the extent it is feasible to do so. In the event it is not practical to construct improvements extending to the existing crosswalk located at the north side of Southeast I 17th Street, a crosswalk may be established south of Southeast I 17th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast 117th Street. L03 POO 18-Roscmonte 5 9. Calculations for surface water detention facilities shall assure that the release of storm water from the site does not exceed the rates allowed by the 1998 King County Drainage Manual for achieving Level l flow control. DECISION The proposed preliminary plat of Rosemonte as revised and revised and received on March 31, 2006 is approved, subject to the following conditions of final plat approval: 1. Compliance with all platting provisions of Title 19A of the King County Code. Actual final recording of the plat ofRosemonte/L03POOl 8 shall either occur subsequent to or concurrent with the recording of the Plat of East Renton/L02P0005. 2. All persons having an ownership interest in the subject property shall sign on the face of the final plat a dedication that includes the language set forth in King County Council Motion No. 5952. 3. The plat shall comply with the base density and minimum density requirements of the R-4 zone classification. All lots shall meet the minimum dimensional requirements of the R-4 zone classification or shall be as shown on the face of the approved preliminary plat, whichever is larger, except that minor revisions to the plat which do not result in substantial changes may be approved at the discretion of the Department of Development and Environment Services. Any/all plat boundary discrepancy(ies) shall be resolved to the satisfaction of ODES prior to the submittal of the final plat documents. As used in this condition, "discrepancy" is a boundary hiatus, an overlapping boundary or a physical appurtenance which indicates an encroachment, lines of possession or a conflict of title. 4. The applicant must obtain final approval from the King County Health Department. 5. All construction and upgrading of public and private roads shall be done in accordance with the King County Road Standards established and adopted by Ordinance No. 11187, as amended (1993 KCRS). 6. The applicant must obtain the approval of the King County Fire Protection Engineer for the adequacy of the fire hydrant, water main, and fire flow standards of Chapter 17.08 of the King County Code. All future residences constructed within this subdivision are required to be sprinklered (NFPA 130) unless the requirement is removed by the King County Fire Marshal or his/her designee. The Fire Code requires all portions of the exterior walls of structures to be within 150 feet (as a person would walk via an approved route around the building) from a minimum 20-foot wide, unobstructed driving surface. To qualify for removal of the sprinkler requirement, driving surfaces between curbs must be a minimum of 28 feet in width when parking is allowed on one side of the roadway, and at least 36 feet in width when parking is pennitted on both sides. The road width requirement applies to both on-site access and roads accessing the subdivision. L03POO 18-Rosemonte Storm Drainage 6 7. Final plat approval shall require full compliance with the drainage provisions set forth in King County Code 9.04. Compliance may result in reducing the number and/or location of lots as shown on the preliminary approved plat. Preliminary review has identified the following conditions of approval, which represent portions of the drainage requirements. All other applicable requirements in KCC 9.04 and the Surface Water Design Manual (SWDM) must also be satisfied during engineering and final review. a. Drainage plans and analysis shall comply with the 1998 King County Surface Water Design Manual. ODES approval of the drainage and roadway plans is required prior to any construction. b. Current standard plan notes and ESC notes, as established by ODES Engineering Review shall be shown on the engineering plans. c. The following note shall be shown on the final recorded plat: "All building downspouts, footing drains, and drains from all impervious surfaces such as patios and driveways shall be connected to the permanent storm drain outlet as shown on the approved construction drawings# on file with DOES and/or the Department of Transportation. This plan shall be submitted with the application of any building permit. All connections of the drains must be constructed and approved prior to the final building inspection approval. For those lots that are designated for individual lot infiltration systems, the systems shall be constructed at the time of the building pennit and shall comply with the plans on file." d. Storm water facilities shall be designed using the KCRTS level one flow control standard. Water quality facilities shall also be provided using the basic water quality protection menu. The size of the proposed drainage tracts may have to increase to accommodate the required detention volumes and water quality facilities. All runoff control facilities shall be located in a separate tract and dedicated to King County unless portions of the drainage tract are used for recreation space in accordance with KCC 21A.l4.l80. e. The applicant has received approval for a drainage adjustment application regarding the proposed shared facility detention pond. The adjustment decision is contained within file number L04V0103. During final review of the engineering plans, all applicable conditions of the adjustment approvals shall be satisfied. f. As stated in the drainage adjustment decision, the detention pond shall be designed using the Level I flow control standard and basic water quality standards are required for design of the drainage facility. If a wet pond facility is provided for water quality, the design shall comply with the 3:1 flow length ratio as outlined on page 6-72 in the drainage manual. L03 POO 18-Rosemonte g. As required by Special Requirement No. 2 in the drainage manual, the 100-year floodplain boundaries for the onsite wetlands shall be shown on the final engineering plans and recorded plat. Access/Roads 8. The proposed subdivision shall comply with the 1993 King County Road Standards (KCRS) including the following requirements: 7 a. During preliminary review the applicant submitted a road variance application (File No. L06V0042), regarding the sag vertical curve and substandard stopping sight distance along the plat frontage. In response to the variance application, the King County Road Engineer provided a decision letter dated June 20, 2006 which approved the variance based upon required illumination for the sag curve on 1481 " Ave SE. The final road improvements and design plans for the project shall demonstrate compliance with all applicable conditions of approval as stated in the variance decision. b. 1481h Avenue SE shall be improved along the frontage as an urban collector arterial including all design criteria from the road variance decision. In accordance with KCRS 2.02, the curb location shall be designed at 22-feet from the road crown to provide full width travel lanes and a bike lane. The preliminary design plan for Rosemonte shows road grading extending outside the right-of-way on the east side of 1481 " Ave SE. During final engineering review, the applicant shall acquire easements for any proposed construction on private property or provide an alternative design which is acceptable to King County for road construction within the existing right-of-way. If desired by the applicant, the road frontage improvements for Rosemonte may be satisfied by development of the East Renton plat. c. The proposed loop road within the subdivision (SE 1181 " St.) shall be improved as an urban subaccess street. d. Tract A shall be improved as a private joint use driveway serving a maximum of two lots. The serving lots shall have undivided ownership of the tract and be responsible for its maintenance. As specified in KCRS 3.0lC, improvements shall include an 18 foot paved surface and a minimum tract width of 20 feet. Drainage control shall include a curb or thickened edge on one side. e. Street trees shall be included in the design of all road improvements and shall comply with Section 5.03 of the KCRS. f. Street illumination shall be provided along the plat frontage for arterial streets in accordance with KCRS 5.05. g. The proposed road improvements shall address the requirements for road surfacing outlined in KCRS Chapter 4. As noted in section 4.01 F, full width pavement overlay is required where widening existing asphalt, unless otherwise allowed by King County. L03 POO 18-Rosemonte 8 h. 148'" Ave SE is classified an arterial street which may require designs for bus zones and turn outs. As specified in KCRS 2.16, the designer shall contact Metro and the local school district to determine specific requirements. 1. Modifications to the above road conditions may be considered by King County pursuant to the variance procedures in KCRS 1.08. 9. All utilities within proposed rights-of-way must be included within a franchise approved by the King County Council prior to final plat recording. 10. The plat plan for Rosemonte shows a retaining wall associated with 145'" Ave SE which extends into the BSBL for the wetland buffer. During engineering review for East Renton, a revised road alignment and grading plan shall be provided which demonstrates that road construction within Rosemonte will comply with applicable sensitive area codes. The revised road design and grading plan may result in modification or loss oflots as shown on the preliminary plat. Alternatively, the applicant may seek approval to use buffer averaging as a means to revise the location of the buffer and BSLB to achieve code compliance. 11. There shall be no direct vehicular access to or from 148'" Ave SE from those lots which abut it. A note to this effect shall appear on the engineering plans and the final plat. 12. Off-site access to the subdivision shall be over a full-width, dedicated and improved road which has been accepted by King County for maintenance. If the proposed access road has not been accepted by King County at the time of recording, then said road shall be fully bonded by the applicant of this subdivision. 13. The applicant shall provide a safe walking access to Apollo Elementary School with urban improvements along the west side of 148" Ave NE to the existing crosswalk on the north side of SE 117'" St. This improvement includes urban frontage improvements along property frontage of the Plat of East Renton, north of SE I 19th Street, as well as urban improvements along frontage of Rosemonte and urban improvements north to the existing crosswalk on the north side of SE 117'"St. In the event it is not practical to construct urban improvements on the west side of 148th Avenue Southeast extending to the existing crosswalk, a new crosswalk may be established south of Southeast 11 7th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast 117th Street. This alternative may use a graded surface on the east side of 148th Ave SE to ensure that school-age pedestrians are provided an acceptable-width walkway surface behind the curbing. The walkway shall be designed to the satisfaction of the school district and DDES. Mitigation/Impact Fees 14. The applicant or subsequent owner shall comply with King County Code 14.75, Mitigation Payment System (MPS), by paying the required MPS fee and administration fee as determined by the applicable fee ordinance. The applicant has the option to either: ( l) pay the MPS fee at the final plat recording, or (2) pay the MPS fee at the time of building permit issuance. If the first option is chosen, the fee paid shall be the fee in effect at the time of plat application and a note L03POO 18-Rosemonte 9 shall be placed on the face of the plat that reads, "All fees required by King County Code 14.75, Mitigation Payment System (MPS), have been paid." If the second option is chosen, the fee paid shall be the amount in effect as of the date of building permit application. 15. Lots within this subdivision are subject to King County Code 21A.43, which imposes impact fees to fund school system improvements needed to serve new development. As a condition of final approval, fifty percent (50%) of the impact fees due for the plat shall be assessed and collected immediately prior to the recording, using the fee schedules in effect when the plat receives final approval. The balance of the assessed fee shall be allocated evenly to the dwelling units in the plat and shall be collected prior to building permit issuance. Wetlands 16. Preliminary plat review has identified specific requirements which apply to this project as listed below. All other applicable requirements from K.C.C. 21A.24 shall also be addressed by the applicant. a. The Class 2 wetland shall have a minimum 50-foot buffer of undisturbed vegetation as measured from the wetland edge. b. Sensitive area tract(s) shall be used to delineate and protect sensitive areas and buffers in development proposals for subdivisions and shall be recorded on all documents of title of record for all affected lots. c. Buffer width averaging may be allowed by King County if it will provide additional protection to the wetland/stream or enhance there functions, as long as the total area contained in the buffer on the development proposal site does not decrease. In no area shall the buffer be less than 65 percent of the required minimum distance. To ensure such functions are enhanced a mitigation plan will be required for the remaining on-site sensitive areas. An enhancement plan shall be submitted for review during engineering review. d. A 15-foot BSBL shall be established from the edge of buffer and/or the sensitive areas Tract(s) and shown on all affected lots. e. To ensure long term protection of the Sensitive Areas a split-railed fence of no more than 4 feet in height shall be installed along the Sensitive Area Tract boundaries in the area of proposed lots. Sensitive Area signs shall be attached to the fence at no less than I 00 foot intervals. f. If alterations of streams and/or wetlands are approved in conformance with K.C.C. 21 A.24, then a detailed plan to mitigate for impacts from that alteration will be required to be reviewed and approved along with the plat engineering plans. A performance bond or other financial guarantee will be required at the time of plan approval to guarantee that the mitigation measures are installed according to the plan. Once the mitigation work is completed to a DDES Senior Ecologist's satisfaction, the performance bond may be replaced by a maintenance bond for the remainder of the five-year monitoring period to guarantee the success of the mitigation. The applicant shall be responsible for the L03 POO 18-Rosemonte l 0 installation, maintenance and monitoring of any approved mitigation. The mitigation plan must be installed prior to final inspection of the plat. g. Prior to commencing construction activities on the site, the applicant shall temporarily mark sensitive areas tract(s) in a highly visible manner, and these areas must remain so marked until all development proposal activities in the vicinity of the sensitive areas are completed. h. During engineering plat review the applicant shall provide a wetland hydrology analysis to demonstrate how the wetland hydrology will be maintained post-construction. 1. Detention out-fall structures maybe permitted within the wetland/stream buffers, however, structures shall be located in the outer edge of the buffer, if possible. All buffer impacts shall be mitigated. 17. Development authorized by this approval may require other state and/or federal permits or approvals. It is the applicant's responsibility to correspond with these agencies prior to beginning work on the site. 18. During engineering review, the plan set shall be routed to the sensitive areas group to determine if the above conditions have been met. Geotechnical 19. The applicant shall delineate all on-site erosion hazard areas on the final engineering plans ( erosion hazard areas are defined in KCC 2 JA.06.415). The delineation of such areas shall be approved by a DDES geologist. The requirements found in KCC 21A.24.220 concerning erosion hazard areas shall be met, including seasonal restrictions on clearing and grading activities. 20. The geotechnical work for this project shall be accomplished in accordance with recommendations presented in the geotechnical engineering report dated April 23, 2003 by Associated Earth Sciences, Inc. a. Structural fill placement shall be continuously monitored and approved in writing by the project geotechnical engineer or engineering geologist. b. After excavation and prior to structural fill or foundation placement, all bearing soils shall be inspected and approved in writing by an experienced geotechnical engineer or engineering geologist. c. Structural fill placed for improved areas such as pavements or floor slabs shall be compacted to at least 95 percent of the maximum dry density by ASTM test designation D-1557 (Modified Proctor) or as recommended by the project geotechnical engineer or engineering geologist. d. All pile foundation installations shall be continuously monitored by a registered geotechnical engineer or a licensed engineering geologist for compliance with an approved plan and the geotechnical report. Compliance and approval of the pile L03 POO 18-Roscmonte foundation installation shall be documented in a report to the King County site or building inspector. II e. The location and height of any proposed rockeries or retaining walls shall be shown on the engineering plans. f. Any created fill slope that is 40 percent or steeper and 10 feet or greater in vertical height shall be subject to a 50-foot wide buffer plus a 15-foot wide setback area from its top, toe and sides. This buffer may be reduced to 10 feet with a satisfactory evaluation by a registered geotechnical engineer or licensed engineering geologist. g. The applicant shall delineate all on-site erosion hazard areas on the final engineering plans ( erosion hazard areas are defined in KCC 2 lA.06.415). The delineation of such areas shall be approved by a DOES geologist. The requirements found in KCC 21A.24.220 concerning erosion hazard areas shall be met, including seasonal restrictions on clearing and grading activities. Sensitive Area 21. The following note shall be shown on the final engineering plan and recorded plat: RESTRICTIONS FOR SENSITIVE AREA TRACTS AND SENSITIVE AREAS AND BUFFERS Dedication of a sensitive area tract/sensitive area and buffer conveys to the public a beneficial interest in the land within the tract/sensitive area and buffer. This interest includes the preservation of native vegetation for all purposes that benefit the public health, safety and welfare, including control of surface water and erosion, maintenance of slope stability, and protection of plant and animal habitat. The sensitive area tract/sensitive area and buffer imposes upon all present and future owners and occupiers of the land subject to the tract/sensitive area and buffer the obligation, enforceable on behalf of the public by King County, to leave undisturbed all trees and other vegetation within the tract/sensitive area and buffer. The vegetation within the tract/sensitive area and buffer may not be cut, pruned, covered by fill, removed or damaged without approval in writing from the King County Department of Development and Environmental Services or its successor agency, unless otherwise provided by law. The common boundary between the tract/sensitive area and buffer and the area of development activity must be marked or otherwise flagged to the satisfaction of King County prior to any clearing, grading, building construction or other development activity on a lot subject to the sensitive area tract/sensitive area and buffer. The required marking or flagging shall remain in place until all development proposal activities in the vicinity of the sensitive area are completed. No building foundations are allowed beyond the required 15-foot building setback line, unless otherwise provided by law. -,, L03 POO 18-Rosemonte Recreational Area 12 22. The plat design shall be revised to provide the minimum suitable recreation space consistent with the requirements ofK.C.C. 21A.14.180 and K.C.C. 21A. 14.190 (i.e., minimum area, as well as, sport court[s], children's play equipment, picnic table[s], benches, etc.), as shown on hearing exh. no. 26. Other a. A detailed recreation space plan (i.e., location, area calculations, dimensions, landscape specs, equipment specs, etc.) shall be submitted for review and approval by DDES prior to or concurrent with the submittal of engineering plats. b. A performance bond for recreation space improvements shall be posted prior to recording of the plat. c. Modify the plat, as needed to comply with KCC 21A.14.180.F, as shown in hearing exh. no. 26 for the plat of East Renton (DDES File No. L02P0005). 23. A homeowners' association or other workable organization shall be established to the satisfaction ofDDES which provides for the ownership and continued maintenance of the recreation, open space and/or sensitive area tract(s), which combine usage of the recreation area of the plat of East Renton (DDES File No. L02P0005) and this plat, as shown in hearing exh. no. 26 for the plat of East Renton. 24. Street trees shall be provided as follows (per KCRS 5.03 and K.C.C. 21A.16.050): a. Trees shall be planted at a rate of one tree for every 40 feet of frontage along all roads. Spacing may be modified to accommodate sight distance requirements for driveways and intersections. b. Trees shall be located within the street right-of-way and planted in accordance with Drawing No. 5-009 of the 1993 King County Road Standards, unless King County Department of Transportation determines that trees should not be located in the street right-of-way. c. If King County determines that the required street trees should not be located within the right-of-way, they shall be located no more than 20 feet from the street right-of-way line. d. The trees shall be owned and maintained by the abutting lot owners or the homeowners association or other workable organization unless the county has adopted a maintenance program. Ownership and maintenance shall be noted on the face of the final recorded plat. e. The species of trees shall be approved by DDES if located within the right-of-way, and shall not include poplar, cottonwood, soil maples, gum, any fruit-bearing trees, or any other tree or shrub whose roots ate likely to obstruct sanitary or storm sewers, or that is not compatible with overhead utility lines. f. The applicant shall submit a street tree plan and bond quantity sheet for review and L03 POO 18-Rosemonte 13 approval by DOES prior to engineering plan approval. g. The applicant shall contact Metro Service Planning at (206) 684-1622 to detennine if 148'" Ave SE is on a bus route. If 148'" Ave SE is a bus route, the street tree plan shall also be reviewed by M ctro. h. The street trees must be installed and inspected, or a performance bond posted prior to recording of the plat. If a performance bond is posted, the street trees must be installed and inspected within one year of recording of the plat. At the time of inspection, if the trees are found to be installed per the approved plan, a maintenance bond must be submitted or the performance bond replaced with a maintenance bond, and held for one year. After one year, the maintenance bond may be released after DOES has completed a second inspection and detennined that the trees have been kept healthy and thriving. 1. A landscape inspection fee shall also be submitted prior to plat recording. The inspection fee is subject to change based on the current county fees. 25. The engineering plans for this project shall identify the location of any wells on the site and provide notes which address the requirements for the contractor to abandon the well(s) pursuant to requirements outlined in the Washington Administrative Code (WAC 173-160). SEPA 26. The following have been established by SEPA as necessary requirements to mitigate the adverse environmental impacts of this development. The applicants shall demonstrate compliance with these items prior to final approval. (I.) To mitigate the significant adverse impact the plat of Rosemonte will have on the intersections of SR 900/148'" Ave SE and SR 900/164'" Ave SE, the applicant shall install, either individually or in conjunction with other development projects in this area, the following improvements at the SR 900/148'" Ave intersection: o A traffic signal, and • Eastbound and westbound left turn lanes The design for the SR 900/148'" Ave intersection improvements shall be approved by the Washington State Department of Transportation (and by King County to the extent such improvements are located in County right-of-way). In addition, at a minimum, the existing entering sight distance looking east for the north and south legs of the intersection (602 feet and 386 feet, respectively) shall not be reduced as part of the intersection improvements. Documentation shall be submitted to show this requirement is met. All construction work associated with the intersection improvements shall be completed between April 1" and September 30'". This seasonal restriction shall be clearly shown on the final engineering plans. In lieu of the installation of the above-noted intersection improvements prior to final plat approval, the applicant may post a financial guarantee with WSDOT which assures the installation of these improvements within two years of the recording ofRosemonte. In this L03POO 18-Rosernonte event, intersection improvement desih'11 must be approved by WSDOT prior to King County approval of the engineering plans for Rosemonte. 14 If the above-noted intersection improvements have already been made by others prior to the recording of Rosemonte, or a financial guarantee has been posted by others which assures the installation of these improvements, then the applicant for Rosernonte shall pay a pro-rata share dollar amount to the developer who has made the improvements or "bonded" for the improvements, in an amount proportional to the impacts of Rosemonte. The pro-rata share dollar amount to be paid shall be set by WSDOT, and documentation shall be provided by the Rosemonte applicant to the King County Land Use Services Division to show this payment has been made, prior to final plat recording. The pro-rata dollar amount to be paid shall be based on the following: • The final Rosemonte lot count • The trip distribution for Rosemonte o The total trips contributed to the intersection of SR 900.148 1 " Ave by the plats of Aster Park (LOOP0024), Stone Ridge 9L99P3008), East Renton (L02P0005), Shamrock (L02P0014), Rosemonte (aka Ironwood-L03POOl 8), Martin (LOSPOOl 9) and any future land use applications submitted to King County for which compliance with the King County Intersection Standards (KCC 14.80) is required at either the SR 900/148'" Ave intersection, or the SR 900/1641 " Ave High Accident Location. In the event that either King County or WSDOT adopts a formal "latecomer's" system prior to final plat recording, that system may be followed in lieu of the approach described above, at the discretion of the applicant, as long as at a minimum there is a financial guarantee wliich assures the above-noted intersection improvements will be installed within two years of the date of recording of the plat of Rosemonte. [Comprehensive Plan Policy T-303 and King County Code 21 A.28 .060A] (2.) Documentation shall be provided to demonstrate to the satisfaction ofWSDOT that stopping sight distance (360 feet) is available on the east leg of the SR 900/148 1 " Ave intersection. The intersection shall be modified by the applicant, if necessary, so that this stopping sight distance requirement is met on the east leg. In addition, the applicant shall clear vegetation within the right-of-way along SR 900, east of 1481 " Ave., to maximize the entering sight distance for the north and south legs of the intersection. [Comprehensive Plan Policy T-303 and King County Comprehensive Policy T-303 and King County Code 2IA.28.060A] ORDERED this 10th day of April, 2007. James N. O'Connor King County Hearing Examiner pro tern L03 POO 18-Rosemonte TRANSMITTED this 9th day of April, 2007, to the parties and interested persons of record: Robert L. Anderson PO Box 353 Maple Valley WA 98038 Claudia Donnelly 10415 -147th Ave. SE Renton WA 98059 Ralph Hickman 9720 NE I 20th Pl.# I 00 Kirkland WA 98034 Seattle KC Health Dept. E. Dist. Environ. Health 14350 SE Eastgate Way Bellevue WA 98007 Lisa Dinsmore DDES/LUSD MS OAK-DE-0100 Shirley Goll DDES/LUSD MS OAK-DE-0100 Steve Townsend DDES/LUSD MS OAK-DE-0100 Bruce Whittaker DDES/LUSD MS OAK-DE-0100 Cam West Devel., Inc. Attn: Sara Slatten 9720 NE !20th Pl. #100 Kirkland WA 98034 Renee & Mark Engbaum 5424 NE I 0th St. Renton WA 98059-4386 Robert D. Johns Johns Monroe Mitsunaga 1601 -I 14th Ave. SE,# 110 Bellevue WA 98004 Triad Associates 12112 -I 15th Ave NE Kirkland WA 98034 Peter Dye DDES/LUSD MS OAK-DE-0100 Kristen Langley DDES/LUSD MS OAK-DE-0100 Larry West DDES/LUSD MS OAK-DE-0100 NOTICE OF RIGHT TO APPEAL Kristine & Keith Childs 12004 -148th Ave. SE Renton WA 98059 John Graves Lozier Homes 1203 I 14th Ave. SE Bellevue WA 98004 Rebecca Lind City of Renton, EDNSP I 055 S. Grady Way Renton WA 98057 Kim Claussen DDES/LUSD MS OAK-DE-0100 Nick Gillen DDES/LUSD MS OAK-DE-0100 Karen Scharer DDES/LUSD MS OAK-DE-0100 Kelly Whiting KC DOT, Rd. Srvcs. Div. MS KSC-TR-0231 15 In order to appeal the decision of the Examiner, written notice of appeal must be filed with the Clerk of the King County Council with a fee of $250.00 (check payable to King County Office of Finance) on or before April 24, 2007. If a notice of appeal is filed, the original and six (6) copies of a written appeal statement specifying the basis for the appeal and argument in support of the appeal must be filed with the Clerk of the King County Council on or before May 1, 2007. Appeal statements may refer only to facts contained in the hearing record; new facts may not be presented on appeal. Filing requires actual delivery to the Office of the Clerk of the Council, Room I 025, King County Courthouse, 516 3'd Avenue, Seattle, Washington 98104, prior to the close of business ( 4:30 p.m.) on the date due. Prior mailing is not sufficient if actual receipt by the Clerk does not occur within the applicable time period. The Examiner does not have authority to extend the time period unless the Office of the u L03 POO 18-Rosemonte 16 Clerk is not open on the specified closing date, in which event delivery prior to the close of business on the next business day is sufficient to meet the filing requirement. If a written notice of appeal and filing fee are not filed within fourteen ( 14) calendar days of the date of this report, or ifa written appeal statement and argument are not filed within twenty-one (21) calendar days of the date of this report, the decision of the hearing examiner contained herein shall be the final decision of King County without the need for further action by the Council. MINUTES OF THE MARCH 22, 2007, PUBLIC HEARING ON DEPARTMENT OF DEVELOPMENT AND ENVIRONMENTAL SERVICES FILE NO. L02P0005 James N. O'Connor was the Hearing Examiner in this matter. Participating in the hearing were Karen Scharer, Pete Dye and Kristen Langley, representing the Department; Robert Johns representing the Applicant; and Renee Engbaum. Exhibit No. I Exhibit No. 2 Exhibit No. 3 Exhibit No. 4 Exhibit No. 5 Exhibit No. 6 Exhibit No. 7 Exhibit No. 8 Exhibit No. 9 Exhibit No. I 0 Exhibit No. 11 Exhibit No. 12 Exhibit No. 13 Exhibit No. 14 Exhibit No. 15 DOES file L02P0005 DOES preliminary report for L02P0005, prepared 12/29/2006 with attachments as follow: 2.1. Plat Map w/66 Lot Plat Design 2.2. City of Renton Sewer Availability 2.3. Road Variance/L03V0049 2.4. Surface Water Management Variance/L02V0089 2.5 Surface Water Management Variance/L04V0!03 2.6. Density Calculations w/R-4 zoning 2.7 Recreation cross section for Tract G (previously labeled Tract C) Application for land use permit no. AO l P0071 received 4/3/2002 Environmental checklist received 4/3/2002 Revised SEPA Mitigated Determination ofNonsignificance, date ofrevised issuance: 12/29/2006 Affidavit of posting of Notice of Application indicating posting date of 5/3/2002, received by ODES on 5/3/2002 Revised Site plan (66 lot preliminary plat map) received 3/17/2006 Assessor's maps (2) SE 10-23-05 & SW 11-23-05 Revised Level I Downstream Analysis by Triad & Associates, received 11/24/2004 Traffic Impact Analysis by Gary Struthers Associates received 4/3/2002 Request for School Information form from the Issaquah School District, received 4/25/2002 King County Certificate of Water Availability, received 4/03/2002 Vicinity Map for L05POO 19, L03POO 18 & L02P0005, prepared by KC staff on 3/19/2007 ODES Field Report and GIS Information dated 5/1/2002 Revised Wetlands Determination and Habitat analysis by C. Gary Schulz dated 9/12/2002 L03POO 18-Rosemonte 17 Exhibit No. 16 Watertype/stream Classification Survey comments from Washington Trout, dated 10/15/2004 Exhibit No. 17 Drainage outfall report by Associated Earth Sciences, Inc., dated 9/24/2002 Exhibit No. 18 Boundary line adjustment proposal with attached map, dated 5/3/2004 Exhibit No. 19 Not entered Exhibit No. 20 Response lo East Renton Transportation Comments by Gary Struthers Associates, Inc., dated 1/23/2003 Exhibit No. 21 Washington State Department ofTranportation comments regarding Traffic Impact Analysis, dated 11/13/2002 Exhibit No. 22 Letter from Claudia Donnelly dated 6/13/2003 regarding basin plan, with 2 attachments Exhibit No. 23 Note from Claudia Donnelly with attached copy of 11/12/03 newspaper article regarding transportation model Exhibit No. 24 City of Renton comments, regarding sewer service, dated 3/28/2002 Exhibit No. 25 Revised language for Condition 6 Exhibit No. 26 Conceptual recreation plan by Triad Associates Exhibit No. 27 Revised preliminary plat received March 22, 2007 Exhibit No. 28 Letter from Renee and Mark Engbaum dated March 22, 2007, with attached map indicating the location of their property Exhibit No. 29 Revisions to Conditions 20, 21 and 22 JNOC:gao L03POOl8 RPT April 5, 2007 OFFICE OF THE HEARING EXAMINER REPORT AND DECISION KING COUNTY, WASHINGTON 400 Yesler Way, Room 404 Seattle, Washington 98104 Telephone (206) 296-4660 Facsimile (206) 296-1654 Email: hearex@metrokc.gov SUBJECT: Department of Development and Environmental Services File No. L02P0005 Proposed Ordinance no. 2007-0010 Location: Applicant: EAST RENTON Preliminary Plat Application West of 148th Avenue Southeast at approximately Southeast 120th Street, Renton Cam West Real Estate Dev., Inc. represented by Robert Johns, Attorney Johns Monroe Mitsunaga 1601 -114th Ave. SE,# 110 Bellevue, Washington 98004 Telephone: (425) 467-9960 Facsimile: ( 425) 451-2818 King County: Department of Development and Environmental Services (DOES) represented by Karen Scharer 900 Oakesdale Avenue Southwest Renton, Washington 98055-1219 Telephone: (206) 296-7114 Facsimile: (206) 296-7051 SUMMARY OF RECOMMENDATIONS/DECISION: Department's Preliminary Recommendation: Department's Final Recommendation: Examiner's Decision: EXAMINER PROCEEDINGS: Approve subject to conditions Approve subject to conditions (modified) Approve subject to conditions (modified) Hearing Opened: March 22, 2007 Continued for Administrative Purposes: March 22, 2007 Hearing Closed: ~ f2 /rCJ f2 n 'i\(I M~, 2007 The public he}Lg(Gtlrt·o~rQ))b~SBo~t Renton was~ ~:~:d~~r:~~ @e K.C. D.D.E.S. L02P0005-East Renton 2 public hearing on the proposed subdivision of Rosemonte (ODES File No. L03POO 18). Participants at the public hearing and the exhibits offered and entered are listed in the attached minutes. At 12:31 p.m. the hearing was continued for administrative purposes, to allow for the submission of proposed exh. no. 29, that would set forth the final recommendation of the department concerning revisions to recommended conditions #'s 6, 20, 21 and 22. Exhibit 29 was received by the Hearing Examiner on March 22, 2007, and the hearing was declared closed on March 23, 2007 A verbatim recording of the hearing is available in the office of the King County Hearing Examiner. ISSUES AND TOPICS ADDRESSED: • • • Future development tract Red-tailed hawks nest Safe walking conditions SUMMARY: Recreation area Wetland buffers Surface water drainage The proposed subdivision of 17.01 acres into 66 lots in the urban area is approved subject to conditions. FINDINGS, CONCLUSIONS & DECISION: Having reviewed the record in this matter, the Examiner now makes and enters the following: FINDINGS: I. General Information: Developer: Engineer: STR: Location: Zoning: Acreage: Number of Lots: Density: Lot Size: Proposed Use: Sewage Disposal: Camwest Real Estate Development, Inc. 9720 NE 120'' Place, Suite I 00 Kirkland, WA 98034 Contact: Sars Slatten 425-825-1955 Triad Associates 12112 115'h Ave NE Kirkland, WA 98034 Contact: Gerry Buck 425-821-8448 I 0-23-05 West of 148'" Ave SE at approximately SEl20'h St. Parcel -I 023059023 R-4 17.0 I acres 66 Approximately 3.9 units per acre Approximately 5,000 square feet in size Single Family Detached Dwellings City of Renton L02P0005-East Renton Water Supply: Fire District: School District: Water District # 90 City of Renton Issaquah School District Complete Application Date: April 17, 2002 3 2. Except as modified herein, the facts set forth in the King County Land Use Services Division's preliminary report to the King County Heating Examiner for the March 22, 2007, public hearing are found to be correct and are incorporated herein by this reference. The LUSD staff recommends approval of this subdivision, subject to conditions. 3. Development of this subdivision may affect, and lead to the abandonment of, a red-tailed hawks nest on the subject property. The red-trail hawk is not an endangered or threatened species, and no protection of the red-tail hawk is afforded by law or the King County Code within the designated urban area of King County. 4. The applicant has proposed the establishment of Tract E as a "future development" tract. DDES determined that there is no reasonable access available to Tract E that would not cross wetland or wetland buffer. At the heating the applicant abandoned its request to designate Tract E as a "future development" tract, and proposes to establish that tract as recreation area, to be connected by trail with the designated recreation/detention Tract G within this subdivision and adjacent to the proposed plat of Rosemonte. 5. The applicant has submitted a revised recreation plan for this subdivision and the adjacent plat of Rosemonte (exh. 26). This plan provides adequate area within Tracts C, G and E and within the proposed recreation tract and trail within Rosemonte to serve these plats jointly with well conceived amenities for recreation and open space, consistent with the requirements of the King County Code. To the extent that a portion of the recreation area necessary to meet the requirements for the plat ofRosemonte is located on the East Renton property, that can be corrected by boundary line adjustment or recording the two plats as a single plat, ifDDES detennines that it is necessary to do so. 6. Wetland buffers within this subdivision will need to be modified, utilizing the buffer averaging provisions of the critical areas code, to accommodate the proposed alignment of 145th Avenue Southeast in the vicinity of the north property line, and adding buffer to mitigate the impacts of the proposed trail corridor within Tract F (between Tracts E and G), in accordance with the provisions ofKCC 21A.24.045.D.47.b. 7. The proposed subdivision will provide for safe walking conditions for students who will walk to Apollo Elementary School on southeast I 17th Street by constructing urban improvements to 148th Avenue Southeast from the plat to Southeast 117th Street. A school crosswalk ( crossing 148th Avenue Southeast) is located on the north side of Southeast 117th Street, where an existing walkway is used by students to travel along the north side of Southeast I 17th Street east from 148th Avenue Southeast to the school. This crosswalk also serves students walking from the area north of Southeast 117th Street. Consequently, the crosswalk should be maintained on the north side of Southeast 117th Street unless it is physically impractical to do so because of constraints resulting from the topography within the right-of-way for 148th Avenue Southeast, south of Southeast I 17th Street. If those constraints preclude extending curb, gutter and sidewalk from the L02P0005-East Renton 4 plat of East Renton to the north side of Southeast 117th Street, the crosswalk can be relocated to the south, and improvements made on the east side of 148th Avenue Southeast to Southeast 117th Street. 8. The conceptual review of drainage plans has shown that there are no downstream impacts likely to occur from development of the subject property if Level 1 flow control and basic water quality treatment improvements are designed and constructed in accordance with the 1998 King County Drainage Manual. The final drainage plan will include calculations to assure that the capacity of drainage facilities and discharge rates will be consistent with those flow control standards. CONCLUSIONS: 1. If approved subject to the conditions recommended below, the proposed subdivision will comply with the goals and objectives of the King County Comprehensive Plan, subdivision and zoning codes, and other official land use controls and policies of King County. 2. If approved subject to the conditions recommended below, this proposed subdivision will make appropriate provision for the public health, safety and general welfare, and for open spaces, drainage ways, streets, other public ways, transit stops, potable water supply, sanitary waste, parks and recreation, playgrounds, schools and school grounds and safe walking conditions for students who only walk to school; and it will serve the public use and interest. 3. The conditions for final plat approval recommended below are in the public interest and are reasonable and proportionate requirements necessary to mitigate the impacts of the development upon the environment. 4. The dedications of land or easements within and adjacent to the proposed plat, as required for final plat approval or as shown on the proposed preliminary plat submitted by the Applicant on March 17, 2006 and the conceptual recreation plan submitted March 22, 2007 ( exh. 26), are reasonable and necessary as a direct result of the development of this proposed plat, and are proportionate to the impacts of the development. 5. No provisions are required to be made by this subdivision for the protection of the red-tail hawks nest(s) on the site. 6. The proposed future development designation for Tract E has been withdrawn by the applicant, and that tract shall be a portion of the designated recreation area for the current development. 7. The proposed conceptual recreation plan submitted as exh. no. 26 is a reasonable and appropriate plan to serve the plats of East Renton and Rosemonte jointly. Minor alterations may be made in the final design and review by DOES, and boundary adjustments, if necessary, may be made to comply with provisions ofKCC 21A.14.180-200. 8. Revisions to the wetland buffers will be necessary to comply with the provisions of the King County Critical Areas Code, to permit construction of 145th Avenue Southeast in the vicinity of the north property line and to mitigate the impacts of the trail connecting Tracts E and G. ·:-. L02P0005-East Renton 5 9. In order to provide for safe walking conditions for students walking from this development to Apollo Elementary School, urban improvements must be made to 148th Avenue Southeast north from the proposed plat to the north side of Southeast 117th Street. These improvements should be made to the west side of 148th Avenue Southeast to the extent it is feasible to do so. In the event it is not practical to construct improvements extending to the existing crosswalk located at the north side of Southeast 117th Street, a crosswalk may be established south of Southeast 117th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast I 17th Street. I 0. Calculations for surface water detention facilities shall assure that the release of storm water from the site does not exceed the rates allowed by the 1998 King County Drainage Manual for achieving Level I flow control. DECISION: The proposed preliminary plat of East Renton, as revised and received on March 17, 2006, is approved, subject to the following conditions of final plat approval: I. Compliance with all platting provisions of Title 19A of the King County Code. 2. All persons having an ownership interest in the subject property shall sign on the face of the final plat a dedication that includes the language set forth in King County Council Motion No. 5952. 3. The plat shall comply with the base density and minimum density requirements of the R-4 zone classification. All lots shall meet the minimum dimensional requirements of the R-4 zone classification or shall be as shown on the face of the approved preliminary plat, whichever is larger, except that minor revisions to the plat which do not result in substantial changes may be approved at the discretion of the Department of Development and Environment Services. Any/all plat boundary discrepancy(ies) shall be resolved to the satisfaction of DOES prior to the submittal of the final plat documents. As used in this condition, "discrepancy" is a boundary hiatus, an overlapping boundary or a physical appurtenance which indicates an encroachment, lines of possession or a conflict of title. 4. The applicant must obtain final approval from the King County Health Department. 5. All construction and upgrading of public and private roads shall be done in accordance with the King County Road Standards established and adopted by Ordinance No. 11187, as amended (l 993 KCRS). (Also see conditions 8 and 24.) L02P0005-East Renton 6. The applicant must obtain the approval of the King County Fire Protection Engineer for the adequacy of the fire hydrant, water main, and fire flow standards of Chapter 17.08 of the King County Code. 6 All future residences constructed within this subdivision are required to be sprinklered (NFPA 13D) unless the requirement is removed by the King County fire Marshal or his/her designee. The Fire Code requires all portions of the exterior walls of structures to be within 150 feet ( as a person would walk via an approved route around the building) from a minimum 20-foot wide, unobstructed driving surface. To qualify for removal of the sprinkler requirement, driving surfaces between curbs must be a minimum of 28 feet in width when parking is allowed on one side of the roadway, and at least 36 feet in width when parking is permitted on both sides. The road width requirement applies to both on-site access and roads accessing the subdivision. 7. Final plat approval shall require full compliance with the drainage provisions set forth in King County Code 9.04. Compliance may result in reducing the number and/or location of lots as shown on the preliminary approved plat. Preliminary review has identified the following conditions of approval, which represent portions of the drainage requirements. All other applicable requirements in KCC 9.04 and the Surface Water Design Manual (SWDM) must also be satisfied during engineering and final review. a. Drainage plans and analysis shall comply with the 1998 King County Surface Water Design Manual. DOES approval of the drainage and roadway plans is required prior to any construction. b. Current standard plan notes and ESC notes, as established by ODES Engineering Review shall be shown on the engineering plans. c. The following note shall be shown on the final recorded plat: "All building downspouts, footing drains, and drains from all impervious surfaces such as patios and driveways shall be connected to the permanent storm drain outlet as shown on the approved construction drawings# on file with DOES and/or the Department of Transportation. This plan shall be submitted with the application of any building permit. All connections of the drains must be constructed and approved prior to the final building inspection approval. For those lots that are designated for individual lot infiltration systems, the systems shall be constructed at the time of the building permit and shall comply with the plans on file." d. Storm water facilities shall be designed using the KCRTS level one flow control standard. Water quality facilities shall also be provided using the basic water quality protection menu. The size of the proposed drainage tracts may have to increase to accommodate the required detention volumes and water quality facilities. All runoff control facilities shall be located in a separate tract and dedicated to King County unless portions of the drainage tract are used for recreation space in accordance with KCC 21A.14.180. L02P0005-East Renton 7 e. The applicant has received approval for two drainage adjustment applications regarding designs for the discharge of storm water and a shared facility detention pond. The adjustment decisions are contained within file numbers L02V0089 and L04V0103. During final review of the engineering plans, all applicable conditions of the adjustment approvals shall be satisfied including requirements for the shared facility located offsite within the plat of Rosemonte. f. As stated in the drainage adjustment decision, the off site drainage pond shall be designed using the Level I flow control standard. Basic water quality standards are also required for design of the facility. If a wet pond facility is provided for water quality, the design shall comply with the 3:1 flow length ratio as outlined on page 6-72 in the drainage manual. For evaluation of the onsite storm vault and the offsite detention pond, a soils report shall be prepared by a geotechnical engineer to evaluate the soils and groundwater conditions. g. For any proposed bypass of storm water from the flow control facility, the final drainage designs shall comply with applicable design requirements in the drainage manual as outlined on pages 1-36 and 3-52. h. As required by Special Requirement No. 2 in the drainage manual, the 100-year floodplain boundaries for the onsite wetlands shall be shown on the final engineering plans and recorded plat. Access and Roads 8. The proposed subdivision shall comply with the 1993 King County Road Standards (KCRS) including the following requirements: a. During preliminary review the applicant submitted a road variance application (File No. L03V0049), regarding the crest vertical curve and substandard stopping sight distance along the plat frontage. In response to the variance application, the King County Road Engineer provided a decision letter dated October 20, 2004 which approved the variance based upon specific design criteria for constructing 148'" Ave SE. As noted in the variance decision, the crest curve on 148'" Ave SE must be reconstructed to provide 455 feet of stopping sight distance based upon design criteria with a 2-foot target. The final road improvements and design plans for the project shall demonstrate compliance with all applicable conditions of approval as stated in the variance decision. b. 148 1h Avenue SE shall be improved along the frontage as an urban collector arterial including all design criteria from the road variance decision. In accordance with KCRS 2.02, the curb location shall be designed at 22-feet from the road crown to provide full width travel lanes and a bike lane. The preliminary design plans for East Renton shows road grading extending outside the right-of-way on the east side of 148'" Ave SE. During final engineering review, the applicant shall acquire easements for any proposed construction on private property or provide an alternative design which is acceptable to King County for road construction within the existing right-of~way. c. The project entry road to 148 11' Ave SE shall be improved as an urban neighborhood L02P0005-East Renton 8 collector. As shown on the preliminary plat, the required right-of-way width,is 56 feet. d, The proposed roads within the subdivision shall be improved using urban design standards and in accordance with the street classifications shown on the preliminary plat map. e. Tract D shall be improved as a private joint use driveway serving a maximum of two lots. The lots served shall have undivided ownership of the tract and be responsible for its maintenance. As specified in KCRS 3.01 C, improvements shall include an 18 foot paved surface and a minimum tract width of 20 feet. Drainage control shall include a curb or thickened edge on one side. f. Street trees shall be included in the design of all road improvements and shall comply with Section 5.03 of the KCRS. g. Street illumination shall be provided along the plat frontage and at intersections with arterials in accordance with KCRS 5.05. h. The proposed road improvements shall address the requirements for road surfacing outlined in KCRS Chapter 4. As noted in section 4.0IF, full width pavement overlay is required where widening existing asphalt, unless otherwise approved by King County. i. 148'h Ave SE is classified as an arterial street which may require designs for bus zones and tum outs. As specified in KCRS 2.16, the designer shall contact Metro and the local school district to determine specific requirements. J. Modifications to the above road conditions may be considered by King County pursuant to the variance procedures in KCRS 1.08. 9. All utilities within proposed rights-of-way must be included within a franchise approved by the King County Council prior to final plat recording. 10. The site plans for East Renton show the northerly road stub for 145'" Ave SE which may extend into the wetland buffer and associated setback within the Rosemont plat. During engineering review for East Renton, a revised road alignment and grading plan shall be provided which demonstrates that road construction within Rosemonte will comply with applicable sensitive area codes. The revised road design and grading plan may result in modification or loss of lots as shown on the preliminary plat. Alternatively, the applicant may seek approval to use buffer averaging as a means to revise the location of the buffer and BSLB to achieve code compliance within Rosemonte. 11. There shall be no direct vehicular access to or from I 48'h Ave SE from those lots which abut it. A note to this effect shall appear on the engineering plans and the final plat. 12. The applicant shall provide a safe walkin~ access to Apollo Elementary School with urban improvements along the west side of 148 1 ' Ave NE to the existing crosswalk on the north side of SE 117'" St. This improvement includes urban frontage improvements along property frontage of the Plat of East Renton, urban improvements along frontage of Rosemonte and urban L02P0005-East Renton 9 improvements north to the existing crosswalk on the·north side of SE 117'" ST. (It is noted that the adjoining plat of Rosemonte also will be subject to urban frontage requirements and urban improvements north to the existing crosswalk on the north side of SE 117'" ST.) In the event it is not practical to construct urban improvements on the west side of 148th Avenue Southeast extending to the existing crosswalk, a new crosswalk may be established south of Southeast I 17th Street and a safe walkway provided on the east side of 148th Avenue Southeast from the new crosswalk to the north side of Southeast I 17th Street. This alternative may use a graded surface on the east side of 148th Ave SE to ensure that school-age pedestrians are provided an acceptable-width walkway surface behind the curbing. The walkway shall be designed to the satisfaction of the school district and DOES. Mitigation/Impact Fees 13. The applicant or subsequent owner shall comply with King County Code 14. 75, Mitigation Payment System (MPS), by paying the required MPS fee and administration fee as determined by the applicable fee ordinance. The applicant has the option to either: ( l) pay the MPS fee at the final plat recording, or (2) pay the MPS fee at the time of building permit issuance. If the first option is chosen, the fee paid shall be the fee in effect at the time of plat application and a note shall be placed on the face of the plat that reads, "All fees required by King County Code 14.75, Mitigation Payment System (MPS), have been paid." If the second option is chosen, the fee paid shall be the amount in effect as of the date of building permit application. 14. Lots within this subdivision are subject to King County Code 21A.43, which imposes impact fees to fund school system improvements needed to serve new development. As a condition of final approval, fifty percent (50%) of the impact fees due for the plat shall be assessed and collected immediately prior to the recording, using the fee schedules in effect when the plat receives final approval. The balance of the assessed fee shall be allocated evenly to the dwelling units in the plat and shall be collected prior to building permit issuance. Wetlands 15. Preliminary plat review has identified specific requirements which apply to this project as listed below. All other applicable requirements from K.C.C. 21A.24 shall also be addressed by the applicant. a. The Class 2 wetland shall have a minimum 50-foot buffer of undisturbed vegetation as measured from the wetland edge. b. Sensitive area tract(s) shall be used to delineate and protect sensitive areas and buffers in development proposals for subdivisions and shall be recorded on all documents of title of record for all affected lots. L02P0005-East Renton 10 c. Buffer width averaging may be allowed by King County if it will provide additional protection to the wetland/stream or enhance their functions, as long as the total area contained in the buffer on the development proposal site does not decrease. In no area shall the buffer be less than 65 percent of the required minimum distance. To ensure such functions are enhanced a mitigation plan will be required for the remaining on-site sensitive areas. An enhancement plan shall be submitted for review during engineering review. d. A 15-foot BSBL shall be established from the edge of buffer and/or the sensitive areas Tract(s) and shown on all affected lots. e. To ensure long term protection of the Sensitive Areas a split-railed fence ofno more than 4 feet in height shall be installed along the Sensitive Area Tract boundaries in the area of proposed lots. Sensitive Area signs shall be attached to the fence at no less than I 00 foot intervals. f. If alterations of streams and/or wetlands are approved in conformance with K.C.C. 21 A.24, then a detailed plan to mitigate for impacts from that alteration will be required to be reviewed and approved along with the plat engineering plans. A performance bond or other financial guarantee will be required at the time of plan approval to guarantee that the mitigation measures are installed according to the plan. Once the mitigation work is completed to a DDES Senior Ecologist's satisfaction, the performance bond may be replaced by a maintenance bond for the remainder of the five-year monitoring period to guarantee the success of the mitigation. The applicant shall be responsible for the installation, maintenance and monitoring of any approved mitigation. The mitigation plan must be installed prior to final inspection of the plat. g. Prior to commencing construction activities on the site, the applicant shall temporarily mark sensitive areas tract(s) in a highly visible manner, and these areas must remain so marked until all development proposal activities in the vicinity of the sensitive areas are completed. h. During engineering plan review the applicant shall provide a wetland hydrology analysis to demonstrate how the wetland hydrology will be maintained post-construction. 1. Detention out-fall structures maybe permitted within the wetland/stream buffers, however, structures shall be located in the outer edge of the buffer, if possible. All buffer impacts shall be mitigated. 16. Development authorized by this approval may require other state and/or federal permits or approvals. It is the applicant's responsibility to correspond with these agencies prior to beginning work on the site. 17. During engineering review, the plan set shall be routed to the sensitive areas group to determine if the above conditions have been met. .. L02P0005-East Renton 11 Geo technical :~ . 18. The applicant shall delineate all on-site erosion hazard areas on the final engineering plans (erosion hazard areas are defined in KCC 21 A.06.415). The delineation of such areas shall be approved by a ODES geologist. The requirements found in KCC 21 A.24.220 concerning erosion hazard areas shall be met, including seasonal restrictions on clearing and grading activities. Sensitive Area 19. The following note shall be shown on the final engineering plan and recorded plat: Other RESTRICTIONS FOR SENSITIVE AREA TRACTS AND SENSITIVE AREAS AND BUFFERS Dedication of a sensitive area tract/sensitive area and buffer conveys to the public a beneficial interest in the land within the tract/sensitive area and buffer. This interest includes the preservation of native vegetation for all purposes that benefit the public health, safety and welfare, including control of surface water and erosion, maintenance of slope stability, and protection of plant and animal habitat. The sensitive area tract/sensitive area and buffer imposes upon all present and future owners and occupiers of the land subject to the tract/sensitive area and buffer the obligation, enforceable on behalf of the public by King County, to leave undisturbed all trees and other vegetation within the tract/sensitive area and buffer. The vegetation within the tract/sensitive area and buffer may not be cut, pruned, covered by fill, removed or damaged without approval in writing from the King County Department of Development and Environmental Services or its successor agency, unless otherwise provided by law. The common boundary between the tract/sensitive area and buffer and the area of development activity must be marked or otherwise flagged to the satisfaction of King County prior to any clearing, grading, building construction or other development activity on a lot subject to the sensitive area tract/sensitive area and buffer. The required marking or flagging shall remain in place until all development proposal activities in the vicinity of the sensitive area are completed. No building foundations are allowed beyond the required 15-foot building setback line, unless otherwise provided by law. 20. The plat design shall be revised to provide the minimum suitable recreation space consistent with the requirements ofK.C.C. 2\A.14.180 and K.C.C. 21A. 14.190 (i.e., minimum area, as well as, sport court[s), children's play equipment, picnic table[s], benches, etc.), as shown on hearing exh. no. 26. a. A detailed recreation space plan (i.e., location, area calculations, dimensions, landscape specs, equipment specs, etc.) shall be submitted for review and approval by DOES prior to or concurrent with the submittal of engineering plats. b. A perfom1ance bond for recreation space improvements shall be posted prior to recording of the plat. L02P0005-East Renton 12 21. Tract E shall be designated for recreational area, with an approved trail (across wetland buffers) extending from the recreational Tract G and functioning as an extension of recreation from Tract G. Plans for the tract -designation and design, shall comply with codes and shall be to the satisfaction of DDES prior to engineering approval. 22. A homeowners' association or other workable organization shall be established to the satisfaction ofDDES which provides for the ownership and continued maintenance of the recreation, open space and/or sensitive area tract(s) which combines usage of recreation area within L03POOJ8, the plat of Rosemonte, pursuant to hearing exh. no. 26. (See condition no. 25.) 23. Street trees shall be provided as follows (per KCRS 5.03 and K.C.C. 21A.16.050): a. Trees shall be planted at a rate of one tree for every 40 feet of frontage along all roads. b. C. d. e. f. g. h. Spacing may be modified to accommodate sight distance requirements for driveways and intersections. Trees shall be located within the street right-of-way and planted in accordance with Drawing No. 5-009 of the 1993 King County Road Standards, unless King County Department of Transportation determines that trees should not be located in the street right-of-way. If King County determines that the required street trees should not be located within the right-of-way, they shall be located no more than 20 feet from the street right-of-way line. The trees shall be owned and maintained by the abutting lot owners or the homeowners association or other workable organization unless the county has adopted a maintenance program. Ownership and maintenance shall be noted on the face of the final recorded plat. The species of trees shall be approved by DDES if located within the right-of-way, and shall not include poplar, cottonwood, soft maples, gum, any fruit-bearing trees, or any other tree or shrub whose roots are likely to obstruct sanitary or storm sewers, or that is not compatible with overhead utility lines. The applicant shall submit a street tree plan and bond quantity sheet for review and approval by DDES prior to engineering plan approval. The applicant shall contact Metro Service Planning at (206) 684-1622 to determine if 148'" Ave SE is on a bus route. If l 48'h Ave SE is a bus route, the street tree plan shall also be reviewed by Metro. The street trees must be installed and inspected, or a performance bond posted prior to recording of the plat. If a performance bond is posted, the street trees must be installed and inspected within one year of recording of the plat. At the time of inspection, if the trees are found to be installed per the approved plan, a maintenance bond must be submitted or the performance bond replaced with a maintenance bond, and held for one year. After one year, the maintenance bond may be released after DDES has completed a L02P0005-East Renton 13 SEPA second inspection and detennined that the trees have been kept healthy and thriving. 1. A landscape inspection fee shall also be submitted prior to plat recording. The inspection fee is subject to change based on the current county fees. 24. The following have been established by SEPA as necessary requirements to mitigate the adverse environmental impacts of this development. The applicants shall demonstrate compliance with these items prior to final approval. (1.) To mitigate the significant adverse impact the plat of East Renton will have on the intersections of SR 9001148 1h Ave SE and SR 9001164 1h Ave SE, the applicant shall install, either individually or in conjunction with other development projects in this area, the following improvements at the SR 9001148th Ave intersection: o A traffic signal, and o Eastbound and westbound left turn lanes The design for the SR 900/l 48'h Ave intersection improvements shall be approved by the Washington State Department of Transportation (and by King County to the extent such improvements are located in County right-of-way). In addition, at a minimum, the existing entering sight distance looking east for the north and south legs of the intersection ( 602 feet and 386 feet, respectively) shall not be reduced as part of the intersection improvements. Documentation shall be submitted to show this requirement is met. All construction work associated with the intersection improvements shall be completed between April I" and September 30'". This seasonal restriction shall be clearly shown on the final engineering plans. In lieu of the installation of the above-noted intersection improvements prior to final plat approval, the applicant may post a financial guarantee with WSDOT which assures the installation of these improvements within two years of the recording of East Renton. In this event, intersection improvement design must be approved by WSDOT prior to King County approval of the engineering plans for East Renton. If the above-noted intersection improvements have already been made by others prior to the recording of East Renton, or a financial guarantee has been posted by others which assures the installation of these improvements, then the applicant for East Renton shall pay a pro-rata share dollar amount to the developer who has made the improvements or "bonded" for the improvements, in an amount proportional to the impacts of East Renton. The pro-rata share dollar amount to be paid shall be set by WSDOT, and documentation shall be provided by the East Renton applicant to the King County Land Use Services Division to show this payment has been made, prior to final plat recording. The pro-rata dollar amount to be paid shall be based on the following: • The final East Renton lot count • The trip distribution for East Renton • The total trips contributed to the intersection of SR 900.148'" Ave by the plats of Aster Park (LOOP0024), Stone Ridge 9L99P3008), East Renton (L02P0005), Shamrock (L02POO 14), Rosemonte (aka Ironwood -L03POO 18), Martin (L05POO 19) and any future land use applications submitted to King County for which compliance L02P0005-East Renton 14 with the King County Intersection Standards (KCC 14.80) is required at either the SR 900/148'" Ave intersection, or the SR 900/164'" Ave High Accident Location. In the event that either King County or WSDOT adopts a fonnal "latecomer's" system prior to final plat recording, that system may be followed in lieu of the approach described above, at the discretion of the applicant, as long as at a minimum there is a financial guarantee which assures the above-noted intersection improvements will be installed within two years of the date of recording of the plat of East Renton. [Comprehensive Plan Policy T-303 and King County Code 21A.28.060A] (2.) Documentation shall be provided to demonstrate to the satisfaction ofWSDOT that stopping sight distance (360 feet) is available on the east leg of the SR 900/148'h Ave intersection. The intersection shall be modified by the applicant, if necessary, so that this stopping sight distance requirement is met on the east leg. In addition, the applicant shall clear vegetation within the right-of-way along SR 900, east of 148'" Ave., to maximize the entering sight distance for the north and south legs of the intersection. [Comprehensive Plan Policy T-303 and King County Comprehensive Policy T-303 and King County Code 21A.28.060A] 25. The recreation area may serve the adjacent plat of Rosemonte. If necessary, boundary line adjustments may be approved to establish a portion of the East Renton plat recreation area as a part of the Rosemonte Plat, or the two plats may be recorded as a single plat. 26. Wetland buffer averaging or additional buffer are required to compensate for reduction of wetland buffers adjacent to 145th Avenue southeast, as proposed in the vicinity of the north property line, and to compensate for construction of the recreation tract trail through wetland buffer between Tracts E and G. ORDERED this 5th day of April, 2007. James N. O'Connor King County Hearing Examiner pro tem TRANSMITTED this 5th day of April, 2007, to the parties and interested persons of record: Robert L. Anderson PO Box 353 Maple Valley WA 98038 Cam West Devel., Inc. Attn: Sara Slatten 9720 NE ! 20th Pl. # I 00 Kirkland WA 98034 Kristine & Keith Childs 12004 -148th Ave. SE Renton WA 98059 L02P0005-East Renton Claudia Donnelly 10415 -147th Ave. SE Renton WA 98059 Ralph Hickman 9720 NE I 20th Pl. # 100 Kirkland WA 98034 Seattle KC Health Dept. E. Dist. Environ. Health 14350 SE Eastgate Way Bellevue WA 98007 Lisa Dinsmore DDES/LUSD MS OAK-DE-0100 Shirley Goll DDES/LUSD MS OAK-DE-0100 Steve Townsend DDES/LUSD MS OAK-DE-0100 Bruce Whittaker DDES/LUSD MS OAK-DE-0100 Renee & Mark Engbaum 5424 NE I 0th St. Renton WA 98059-4386 Robert D. Johns Johns Monroe Mitsunaga 1601 -I 14th Ave. SE,# 110 Bellevue WA 98004 Triad Associates 12112-115th Ave NE Kirkland WA 98034 Peter Dye DDES/LUSD MS OAK-DE-0100 Kristen Langley DDES/LUSD MS OAK-DE-0100 Larry West DDES/LUSD MS OAK-DE-0100 NOTICE OF RIGHT TO APPEAL John Graves Lozier Homes 1203 I 14th Ave. SE Bellevue WA 98004 Rebecca Lind City of Renton, EDNSP 1055 S. Grady Way Renton WA 98057 Kim Claussen DDES/LUSD MS OAK-DE-0100 Nick Gillen DDES/LUSD MS OAK-DE-0100 Karen Scharer DDES/LUSD MS OAK-DE-0100 Kelly Whiting KC DOT, Rd. Srvcs. Div. MS KSC-TR-0231 15 In order to appeal the decision of the Examiner, written notice of appeal must be filed with the Clerk of the King County Council with a fee of $250.00 (check payable to King County Office of Finance) on or before April 19, 2007. If a notice of appeal is filed, the original and six ( 6) copies of a written appeal statement specifying the basis for the appeal and argument in support of the appeal must be filed with the Clerk of the King County Council on or before April 26, 2007. Appeal statements may refer only to facts contained in the hearing record; new facts may not be presented on appeal. Filing requires actual delivery to the Office of the Clerk of the Council, Room 1025, King County Courthouse, 516 3'' Avenue, Seattle, Washington 98104, prior to the close of business ( 4: 30 p.m.) on the date due. Prior mailing is not sufficient if actual receipt by the Clerk does not occur within the applicable time period. The Examiner does not have authority to extend the time period unless the Office of the Clerk is not open on the specified closing date, in which event delivery prior to the close of business on the next business day is sufficient to meet the filing requirement. L02P0005-East Renton 16 If a written notice of appeal and filing fee are not filed within fourteen (14) calendar days of the date of this report, or if a written appeal statement and argument are not filed within twenty-one (21) calendar days of the date of this report, the decision of the hearing examiner contained herein shall be the final decision of King County without the need for further action by the Council. MINUTES OF THE MARCH 22, 2007, PUBLIC HEARING ON DEPARTMENT OF DEVELOPMENT AND ENVIRONMENT AL SERVICES FILE NO. L02P0005 James N. O'Connor was the Hearing Examiner in this matter. Participating in the hearing were Karen Scharer, Pete Dye and Kristen Langley, representing the Department; Robert Johns representing the Applicant; and Renee Engbaum. Exhibit No. I Exhibit No. 2 Exhibit No. 3 Exhibit No. 4 Exhibit No. 5 Exhibit No. 6 Exhibit No. 7 Exhibit No. 8 Exhibit No. 9 Exhibit No. I 0 Exhibit No. 11 Exhibit No. 12 Exhibit No. 13 Exhibit No. 14 Exhibit No. 15 Exhibit No. 16 DOES file L02P0005 ODES preliminary report for L02P0005, prepared 12/29/2006 with attachments as follow: 2.1. Plat Map w/66 Lot Plat Design 2.2. City of Renton Sewer Availability 2.3. Road Variance/L03V0049 2.4. Surface Water Management Variance/L02V0089 2.5 Surface Water Management Variance/L04V0103 2.6. Density Calculations w/R-4 zoning 2.7 Recreation cross section for Tract G (previously labeled Tract C) Application for land use permit no. AOIP0071 received 4/3/2002 Environmental checklist received 4/3/2002 Revised SEPA Mitigated Determination ofNonsignificance, date of revised issuance: 12/29/2006 Affidavit of posting of Notice of Application indicating posting date of 5/3/2002, received by DOES on 5/3/2002 Revised Site plan (66 lot preliminary plat map) received 3/17/2006 Assessor's maps (2) SE 10-23-05 & SW 11-23-05 Revised Level I Downstream Analysis by Triad & Associates, received 11/24/2004 Traffic Impact Analysis by Gary Struthers Associates received 4/3/2002 Request for School Information form from the Issaquah School District, received 4/25/2002 King County Certificate of Water Availability, received 4/03/2002 Vicinity Map for L05POOl 9, L03POOl 8 & L02P0005, prepared by KC staff on 3/19/2007 DOES Field Report and GlS Information dated 5/1/2002 Revised Wetlands Detennination and Habitat analysis by C. Gary Schulz dated 9/12/2002 Watertype/stream Classification Survey comments from Washington Trout, dated I 0/15/2004 . . ' L02P0005~East Renton 17 Exhibit No. 17 Exhibit No. 18 Exhibit No. 19 Exhibit No. 20 Exhibit No. 21 Exhibit No. 22 Exhibit No. 23 Exhibit No. 24 Exhibit No. 25 Exhibit No. 26 Exhibit No. 27 Exhibit No. 28 Exhibit No. 29 JNOC:gao L02P0005 RPT Drainage outfall report by Associated Earth Sciences, Inc., dated 9/24/2002-- Boundary line adjustment proposal with attached map, dated 5/3/2004 Not entered Response to East Renton Transportation Conunents by Gary Struthers Associates, Inc., dated 1/23/2003 Washington State Department ofTranportation comments regarding Traffic Impact Analysis, dated l l /13/2002 Letter from Claudia Donnelly dated 6/13/2003 regarding basin plan, with 2 attachments Note from Claudia Donnelly with attached copy of 11 /12/03 newspaper article regarding transportation model City of Renton comments, regarding sewer service, dated 3/28/2002 Revised language for Condition 6 Conceptual recreation plan by Triad Associates Revised preliminary plat received March 22, 2007 Letter from Renee and Mark Engbaum dated March 22, 2007, with attached map indicating the location of their property Revisions to Conditions 20, 21 and 22 Date: August 20, 2007 To: Craig Comfort King County Department of Transportation 201 S Jackson St MSKSC-0231 Seattle, WA 98104-3856 Job No: 01-047 Project: East Renton / Rosemonte (L02P0005 / L03P0018) Variance Request Enclosed are: D Prints 0 Copies 0 Reproducibles 0 Reports 0Documen/s D Specifications 0 Other check I 8/13/07 1 10/28/05 3 8/15/07 1 8/15/07 These have been sent: 0 For Your Use 0 For Your Review I Approval D For Your Signature I Return 0 At Your Request 0 For Your Records 0 For Your Information 0 Other Camwest East Renton LLC Check No. 5135 ($1,730.49 Road Variance Fee). DDES Variance Submittal Checklist Original (One Copy) -Signed Variance Request and (Two Copies)-Signed Variance Request. Signed Certificate of Applicant Status Form 12112 115thAvenueNE Kirkland, WA 98034~6929 425.821.8448 425 821.3481 fax 800.488.0756 toll free www.triadassoc.com 3 8/15/07 3 3 Cover Letter to Craig Comfort (Prepared by Rebecca Cushman) Related-Online Permit Applications Report (Two Separate Results) 11 I 17 -Site Plans 1, 8-12 of22 (Road Plans-Triad) 3 COA -East Renton/ Rosemonte (L02P0005 / L03P0018) Remarks: Craig, Please review the enclosed variance for three illuminated sag curves, one on a sub-collector street ~nd two on sub-access streets. This request is to approve an adjustment to the 1993 King County Road Standards section 2.12C and D. If you have any questions, please contact Rebecca Cushman, the Project Engineer, in our office (800-488-0756 or e-mail rcushman@triadassoc.com. Thank you. Sent By: -6'rAi~..._4 L.t _..~~:J£..:...l...(~...J...L...uc:VJ.Al=t.L-__ Lee Ann Fraser ILO 7 WO(()§ 2 Copies To: Jennifer Rei~~J~ ~ W ~ ID' (w/encl) AUG 2 2 20J7 ~ K.C. D.D.E.S. l\,mmill lil©W©D@IJ)IDJ©ID8 lll@mlilw08IDID8lil • • King County ,Department of Development and Environmental Services 900 Oakesdale Avenue Southwest -~~ .. t:i~ CERTIFICATION OF APPLICANT STATUS Renton, Washington 98057-5212 206-296-6600 TTY 206-296-7217 For alternate formats, call 206-296-6600. Permit Number: [o,CJ/JQ?o5:/ L-0. 1PC<21 ~ Activity Number: Permit Name: { :2,," +:;:, j JZo (ew o::,c:be -------------- ' FOR INDIVIDUALS: I, (print name), hereby certify that I am the/an owner of the property which is the subject of this permit. If I am not the sole owner of the property, I certify that I am authorized to represent all other owners of the property. My mailing address is: . I further certify that I am the "Applicant" for this permit and as such am financially responsible for all fees and will receive any refunds paid. I shall remain the "Applicant" for the duration of this permit unless I transfer my "applicant" status in writing on the form provided by DOES. * Signature of Applicant Date Signed -OR- FOR CORPORATIONS/BUSINESS ASSOCIATIONS: I, ....,IQ.I\ r'.I; fr .r ]_p ;,uz. r (print name), hereby certify that I am an authorized agent of {!a, ..... U/LJ f ).q vt-l,'¥1"', PJ. r:;.,,"-. , a corporation or other business association authorized to do business in the State of Washington, which is the sole owner of the property that is the subject of this permit. If this corporation or business association is not the sole owner of the property, I certify that this corporation/business association is authorized to represent all other owners of the property. The mailing address of this corporation/business association is: I further certify that the above named corporation/business association is the "Applicant" for this permit and as such is financially responsible for all fees and will receive any refunds paid. This corporation/business association shall remain the "Applicant" for the duration of this permit unless it transfers its applicant status in writing on the form provided by DOES. ~Q~ * SignaturfApplicant's Agent Date Signed * By signing as the Applicant or the Applicant's Agent, I certify under penalty of perjury un ~~~ Jh~ !t~J[)' Washington that the information provided above is true and correct. I.JU AUG 2 2 WO? [_'.:V CertApplicanlia.Jl'Jt1 W «J)JQ.JJ/1 2 06/28/2007 K.C. D.D.E.&age 1 of2 CertApplicantStatusFORM.doc lc-cer-apstat.pdf 06/28/2007 Page 2 of 2 • ,NOTICE TO APPLICANTS: By law, this department returns all engineering and other plans to the 1applicant. If, however, you wish to authorize the department to return engineering and other plans directly to the engineer, architect, or other consultant for the limited purpose of making corrections, 'please designate below: ~orize this department to return plans directly to my consultant(s) for the limited purpose of making corrections as designated on this form. CONSULTANTS: • 7 C!/o 'Tr, M !±-?so e-1 ,ck 1:;;. /:).. II,) /IS*"-4«, LJ£ Check out the DDES Web site at www.klnqcounty.gov/permlts CertApplicanlStatusFORM.doc lc-cer-apstat.pdf 06/28/2007 Page 2 of 2