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SEPA E02-018 - LEABO DON - LEABO 7-LOT SHORT PLAT
DON LEABO GREENRIDGE SEVEN LOT SHORT PLAT 4310 & 4320 S. 150T" ST E02 -018 Dept. Of Community Development City of Tukwila AFFIDAVIT OF DISTRIBUTION I, L 3L / HEREBY DECLARE THAT: Notice of Public Hearing Determination of Non - Significance Project Name: 4.6,4&O Notice of Public Meeting Project Number: t-1192-40/5 Mitigated Determination of Non - Significance Mailer's Signature: L. 6;. • Board of Adjustment Agenda Pkt Person requesting mailing: DE/3 Determination of Significance & Scopang Notice Board of Appeals Agenda Pkt Notice of Action Planning Commission Agenda Pkt Official Notice Short Subdivision Agenda Notice of Application Shoreline Mgmt Permit Notice of Application for Shoreline Mgmt Permit __ FAX To Seattle Times Classifieds Mail: Gail Muller Classifieds PO Box 70 - Seattle WA 98111 Other Was mailed to each of the addresses listed on this '31 day of the year 20 D2 P:GINAWYNETTA/FORMS /AFFIDAVIT -MAIL 08/29/003:31 PM Project Name: 4.6,4&O Project Number: t-1192-40/5 Mailer's Signature: L. 6;. • { Person requesting mailing: DE/3 P:GINAWYNETTA/FORMS /AFFIDAVIT -MAIL 08/29/003:31 PM City of Tukwila Department of Community Development / 6300 Southcenter BL, Suite 100 / Tukwila, WA 98188 / (206) 431 -3670 DETERMINATION OF NON - SIGNIFICANCE (DNS) File Number: E02 -018 Applied: 08/05/2002 Issue Date: 10/28/2002 Status: ISSUED Proponent: DON LEABO Lead Agency: City of Tukwila Description of Proposal: SEVEN LOT SHORT PLAT. Location of Proposal: Address: 4310 S 150 ST TUKW Parcel Number: 0042000085 Section/Township /Range: SW 1/4 OF NE 1/4 22/23/4 The City has determined that the proposal does not have a probable significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21c.030(2) (c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. Steve Lancaster, Responsible Official City of Tukwila 6300 Southcenter Blvd Tukwila, WA 98188 (206)431 -3670 Date Any appeal shall be linked to a specific governmental action. The State Environmental Policy Act is not intended to create a cause of action unrelated to a specific governmental action. Appeals of environmental determinations shall be commenced within the time period to appeal the governmental action that is subject to environmental review. (RCW 43.21C.075) doc: Miscperm E02 -018 Printed: 10 -28 -2002 ty • of Tukwila • Steven M Mullet, Mayor Department of Commis : ity Development Steve Lancaster, Director To: Steve Lancaster From: Deborah Ritter Date: October 28, 2002 Re: MEMORANDUM E02 -018 (SEPA Determination) Leabo 7 -Lot Short Plat 4310 and 4320 S. 150th Project Description: This SEPA review is for a seven -lot short plat. The site is comprised of two adjacent tax parcels (totaling approximately 60,000 square feet in size) located on the north side of South 150th and containing two existing single - family. homes. Three of the seven homes will front on South 150th with direct access from that street. Access to the four rear lots will also be from South 150th via a central access road with a hammerhead turnaround. South 150th was recently improved by the City of Tukwila with curb, gutter and sidewalk. Agencies with Jurisdiction: None. Summary of Primary Impacts: • Earth The site topography slopes downward from north to south and the average slope is 5 %. A few small, isolated spots on the site are approximately 20 %. Soils are comprised of Alderwood series silt. An erosion control plan will be employed during construction. • Air Dust and exhaust emissions will be generated during construction, with watering as necessary to control dust. 6300 Southcenter Boulevard, Suite #100 0 Tukwila, Washington 98188 0 Phone: 206 - 431 -3670 0 Fax: 206 - 431 -3665 E02 -018 Leabo 7 -Lot Short Plat October 28, 2002 Page 2 • Water • • The project requires surface water treatment which has been approved by the Public Works Department and designed to King County Surface Water Design Manual standards. • Plants • Site vegetation consists of grass, shrubs and scattered trees. A tree clearing permit will be required for removal of any tree (of 4 inches in diameter at breast height) located in a sensitive area (slopes that have gradients of 20% or greater). Per TMC 17.20.030(G)(1), each lot will be landscaped with at least one tree in the front yard to create a uniform streetscape. Animals No endangered or threatened wildlife species have been identified at the site. Energy /Natural Resources Typical residential use for heating and lighting. Energy conservation features in the proposed construction include insulation in ceilings, walls, floors and windows. • Environmental Health Noise generated by construction equipment will occur on a short-term basis. The hours of construction will comply with the City's noise ordinance. • Land /Shoreline Use The project is located in the Low - Density Residential zone (LDR). Properties to the north, west, east and south are also zoned LDR. Thorndyke Elementary School is located on the south side of South 150th, south and east of the proposal. E02 -018 Leabo 7 -Lot Short Plat October 28, 2002 Page 3 • Housing • • Two existing single - family homes are currently located on the property and will be retained. The proposal will allow for the construction of five additional single - family homes. • Aesthetics The proposal is not subject to Board of Review design review and standards. Per TMC 17.20.030(G)(1), each lot will be landscaped with at least one tree in the front yard to create a uniform streetscape. • Light and Glare • • Lighting has been installed on South 150th Street. No additional lighting on the private access road will be required. Additional light and window glare from the proposed houses and associated cars will be created as a result of the project. Recreation Thorndyke Elementary School is located south and east of the proposed site. Historic and Cultural Preservation No known places or landmarks. Transportation The project will be accessed from South 150th Street. The nearest bus stop is approximately one -half mile to the west. The project is exempt from concurrency requirements due to its low trip generation. • Public Services No significant increase in public services is expected. E02 -018 Leabo 7 -Lot Short Plat October 28, 2002 Page 4 • Utilities • • Electricity, natural gas, water and sanitary sewer services are currently available along South 150th Street. These services will be extended to each of the seven lots. Recommendation: Determination of Non - Significance. • • CITY OF TUKWILA PUBLIC WORKS PROJECT REVIEW COMMENTS Project Name: Leabo Short Plat File #: [02 -018 L02 -037 Review #: #2 Date: 10.24.02 Reviewer: L. Jill Mosqueda, P.E. The City Of Tukwila Public Works Department has the following comments regarding your application for the above permit revision. Please contact Jill Mosqueda at 206.433.0179, if you have any questions. SEPA No comments Short Plat • Documents for the access easement shown on the short plat shall be recorded separately, when the short plat is recorded. • Documents for the 5' dedication, Quit deed, and Excise Tax Agreement, shall be recorded separately, when the short plat is recorded. For the Public Works permit application to install infrastructure Permits On Oct. 16, 2002, the City implemented a new Public Works permit system. Please refer to enclosed Bulletin 1. Public Works also has a new right -of -way use ordinance, Title 11, enclosed. Fees have gone up and requirements for work in the right -of -way are more stringent. Improvements for this short plat will be installed under a Type C permit. This permit will cover work onsite and in the right of way. Applicant shall pay a "plan review and approval fee" with the application and a "permit issuance and inspection fee" when the permit is issued. The plan review and approval fee includes two reviews. Additional reviews, due to non - response from the Applicant will be charged. The plan review and approval fee covers two inspections. Any additional inspections, per inspection item, will be charged an additional fee. For Work in Right -of -way 1. For work in the right -of -way (row) provide: Projects /short plat/L02 -037 Leabo #1 1 • • Plan, profile, cross - section, showing elevations, slopes, materials, diameters, bedding material, etc. • Insurance per TMC 11.08.100. • Deposits, fees and bonds per TMC 11.08.110. • Hold Harmless agreement per TMC 11.08.120 Legal Documents • To comply with subdivision standards for public access roads, the City requires dedication of property five feet wide along S 150`h St. To complete the dedication, you must adjust the property lines and provide the City a Quit Deed with legal description, attached drawing, and a completed King County Excise Tax form. These will be recorded with the short plat. • For each easement, provide an easement and drawing as separate documents for recording with the short plat. • Storm drainage maintenance agreement to be recorded separately from the short plat. • Access easement and maintenance agreement to be recorded separately from the short plat. Access In order to minimize driveway conflicts for lots 6 and 7, provide either of the two following options: 1. Relocate driveway #3 farther east as described in the sight analysis in the traffic report by Gibson Traffic Consultants, 2. Combine driveways #3 and #4 into one shared access at the property line. Storm Drainage (King County Surface Water Design Manual KCSWDM) • The required surface water management practice for new impervious surface is infiltration, unless the soils will not infiltrate. Please provide an addendum to the geotechnical report, which discusses infiltration on the site. • Footing drains and roof drains shall be separate systems. • If the geotechnical addendum indicates infiltration is possible, provide infiltration. KCSWDM pg. 1 -36 Sizing credits do not apply when calculating impervious surface for Core Req. #3. Sizing credits do apply when modeling for the retention volume. • Provide a Final full drainage review Technical Information Report with the construction permit application. The report must include all items listed in the KCSWDM page 2 -8 and infiltration for sites that qualify. Projects /short plat/L02 -037 Leabo #1 2 • Memorandum TO: Cindy Knighton, City of Tukwila, Public Works FROM: Terry Gibson, Gibson Traffic Consultants (GTC)-11-6- DATE: October 14, 2002 RE: Leabo 7 -Lot Short Plat at 4310/4320 S. 150th Street in Tukwila Sight Distance & Driveway Spacing Issues RECEIVED CITY OF TUKWILA OCT 2 1 2002 PERMIT CENTER Gibson Traffic Consultants (GTC) has been retained by Greenridge Homes (Don Leabo) to conduct a traffic /safety assessment of the proposed 7 -lot short plat on S. 150th Street east of S. 42 "d Avenue in the City of Tukwila. GTC contacted you on October 1St to discuss scoping issues for the subject project, and you requested that GTC assess sight distances at the proposed driveway locations plus driveway spacing issues. GTC completed field measurements of available sight distances at each driveway on October 1, 2002 as well as the spacings between proposed driveways at the subject plat. This memorandum summarizes the findings and conclusions of GTC's traffic assessment of proposed site access for the Leabo 7 -Lot Short Plat project. Existing Conditions: S. 150th Street is a 2 -lane local access street with two (2) travel lanes, 28 -foot street width and sidewalks on both sides. The de -facto speed limit is 25 mph on 150th Street and on- street parking is prohibited on both sides. There are presently a total of three (3) driveway curb cuts at the subject short plat: one driveway each for Lots 1, 6 and 7 and a proposed joint- access driveway within a 20 -foot easement to serve Lots 2, 3, 4 and 5 at the north end of the proposed plat. Driveway #1 accesses an existing SFD home ( #4310) on Lot 1, with its centerline located 29 feet west of the centerline for the 20 -foot joint- access easement (to be called Driveway #2). Driveway #3 accesses Lot 6 and is located 25 feet east of the centerline of Driveway #2, which has an existing width of 10 feet. Driveway #4 has a 20 -foot existing width and is located 16 feet west of the east plat boundary. Available Sight Distances at Driveways: Using AASHTO methodology, GTC measured available entering sight distances (ESD) to the east/left and west/right of each access driveway. As shown in attached Site Photos, the only restricted views from the proposed access driveways are the views to the east/left from Driveway #1 and Driveway #2. The views to the west /right are unobstructed from all 4 driveways and the views to the east/left are also unobstructed from Driveways #3 and #4. The partially obstructed views from the westernmost driveways are restricted by the vertical crest in the street profile, which occurs near the centerline of Driveway #4. GTC measured 260 feet of ESD from the joint access Driveway #2 (to Lots 2, 3, 4 and 5) and 225 feet of ESD from Driveway #1 which accesses the existing home at 4310 150th Street. Sight Distances vs. AASHTO Standards: 150th Street does not have a posted speed limit but is assumed to be 25 mph as for all local access streets. Since Thorndyke Elementary School is located just east of the proposed short plat (180 feet from east property boundary to west school driveway), a design speed of 25 mph is appropriate especially since the City of Tukwila is considering lowering the speed on 150th Street to ° 0O U j�j V 8-RAFFIC OIMULURTIM • 20 mph to be consistent wi'.h the school zone speed limit. The Driveway #1 access to the existing home was prior approved by the City and the sight distance at this location is not applicable to the subject short-plat application. Since 150th Street dead -ends a few blocks to the east at the 1 -5 freeway, exiting motorists from all plat driveways would turn right toward 42 "d Avenue. Note: The only plat traffic that may turn left would be destined for the school site, located one block to the east, and walking trips are likely to /from the school. As shown in the attached AASHTO sight distance nomograph (see Exhibit 9 -59), 240 feet of ESD is required for a 25 -mph design speed. Since there is 260 feet of ESD available from the proposed joint- access Driveway #2, adequate sight distance is provided at this access location to safely negotiate the critical right -exit movement from this driveway. In summary, there are adequate sight distances provided at the proposed access locations (Driveways #2, #3 and #4) to satisfy AASHTO design standards for entering sight distance. Driveway Spacing Issues: The proposed joint- access driveway (for Lots 2, 3, 4 and 5) would be located only 25 feet east of Driveway #6. This driveway spacing is below the usual minimum spacing guidelines (50 foot minimum), but Driveway #3 could be placed on the right side of the parcel which would provide a more desirable 45 -foot offset to the the joint/main Driveway #2. This possible driveway relocation would result in more even spacings of 45 and 50 feet, respectively, to the adjacent driveways to Lots 6 and 7. As for driveway consolidation, direct driveway accesses to Lots 6 and 7 are necessary since the maximum number of lots served by a private access road (as proposed) is four (4) and there is not enough room to construct a public street. If youhave any questions on this memorandum and findings please call me at (253) 857- 8840. Thanks again, Cindy, for your timely help. • XC: Don Leabo, Greenridge Homes 9-g ° ©E1 RAFFIC Intersections METRIC 130 120 110 100 90 T 80 ✓' 70 fi 60 D 50 40 30 20 80 70 ^ '60 av 50 o' 40 co m 0 f' YI I NI 1111 !1 � iiiii,iiiUIIlIIIIIP1UIIIIP1111 IIIII1HiiiiimiiiuIPv u PRPF 20 10 0 0 50 100 150 200 250 300 350 Length of Sight Triongle Leg (m) US CUSTOMARY PC v su COMB r .r. 100 00 _v 00 ' �� 400 500 600 700 800 900 1000 1100 1 ,"'!(r') ; :(.:,h) Length of Sight Triongle Leg (ft) Exhibit 9 -59. Intersection Sight Distance —Case B2—Right Turn from Stop and Case B3- Crossing Maneuver ASPHALT:: ACCESS. Sc • UTILITY A-SEMENT 30.57' DETENTION- PIPE AND::WETV ULT 186 `LF :OF 72" DIA CMP.+' DET. .VOLUME: ;2217 CF WETVAULT ',VOL: '3047; CF• DER .• _OW LINE ACCESS f& UTILITY ;zt 'I EASEMENT 6:/)chain ---\S' if.. 1f nk fence 9.01' Exist.. House #4310 1 6518 SF CB #3 (T1) -\RIM:225.7 1E, ._223.2 (112" NE) ---� 9.84:' �.EXIST. DRIVEWAY \i _ j � TO REMAIN \` 1 ih 1 . Inv .12'iCpV 19.14. i =223.2 north er,c. = 219 6 (5= 219:.4 _65.18 6 ..8932.5. SF 1 FFE: ` I ,..) 229.0 I CB#1 (TYPE 2-54") I W/ FLOW RESTRICTOR RIM: .226.0 IE: 220.0 (24 ",N) co 11.E: 220.0 (12 ",S) f._ FFE: 230.0 • 7 6505 SF. 1 0 ui IMMO JO f�E (DEDICATED r7`rnn i 3" PVC DRAIN DRIVEWAY YARD DRAIN _Th 10 ESMT ` -`- ex. conc.. \yolk wm l`-j Curb Cu; 57' -12" CPEP ®. 5.61 192.78' curb cut ex. conc.. wai N88'09'02 "W %cu• 20.0' 0.7 20.0' curb cut 20--1 NEW 20' WIDE CURB DROP e' . rnnr\ 'ImirPw'ro mlogYti N,Pylmoilm Bergquist Engineering Services 27207 8th Avenue S PO. Box 13309 Des Moines, Washington 98198 Des Moines, Washington 98198 Phone: 253.941.9399, Fax: 253.941.9499, e- mail: RBergqu510 @aol.com October 11 2002 Mr. Don Leabo 6855 176th Avenue NE, #235 Redmond, Washington 98052 Re: Geotechnical Exploration and Engineering Analysis Seven Residential Buildings 4310 — 4320 S 150' Street Tax Parcel Numbers 0042000086 and 0042000085 Tukwila, Washington BES Project Number: 200212, Report 1 Dear Mr. Leabo: Bergquist Engineering Services is pleased to provide this report of the geotechnical exploration for the referenced project. The attached report summarizes project and site data, describes the services we performed, and presents our findings and recommendations for foundations, lateral earth pressures, and earthwork. The appendix of the report presents site maps, test -pit logs, and explanatory aids. Based on our exploration and engineering analysis, the proposed buildings may be supported on conventional spread- footings using an allowable bearing capacity of up to 2,000 psf if the footings are placed on undisturbed native soils or on properly compacted structural backfill. Specific recommendations relative to design and construction of this project are presented in the attached report. The subsurface conditions and recommendations presented should be verified during construction. GEOTECHNICAL ENGINEERING AND CONSTRUCTION INSPECTION Seven Residential Buildings Tukwila, Washington BES Project Number: 200212, Report 1 October 11, 2002 We appreciate the opportunity to be of service to you. If you have any questions concerning this report, or if we may be of additional service, please contact us. Copies to: Addressee (5) Sincerely, Bergquist Engineering Services Richard A. Ber Principal st, PE ii TABLE OF CONTENTS 1. INTRODUCTION 1 2. PROJECT DESCRIPTION 2 3. SCOPE OF SERVICES 2 4. SITE CHARACTERIZATION 3 4.1 Surface 3 4.2 Subsurface Soil and Groundwater 3 5. DISCUSSION 4 6. RECOMMENDATIONS 5 6.1 Seismic Considerations 5 6.2 Foundations 5 6.3 Slabs -On -Grade 6 6.4 Earthwork 6 6.4.1 Site Clearing 7 6.4.2 Excavation 7 6.4.3 Foundation Preparation 7 6.4.4 Slab -On Grade Preparation 7 6.4.5 Materials 8 6.4.6 Placement and Compaction 9 6.5 Drainage 9 6.6 Groundwater 10 6.7 Construction Observation and Testing 10 7. REPORT LIMITATIONS 10 APPENDIX Vicinity Map Al Site Plan A2 Logs of Test Pits A3 Test Pit Log Notes A6 Unified Soil Classification System A8 Schematic of Footing Drain A9 Notes Al0 GEOTECHNICAL EXPLORATION AND ENGINEERING EVALUATION PROPOSED SEVEN RESIDENTIAL BUILDINGS 4312 — 4320 S 150Th STREET TAX PARCEL NUMBERS 0042000086 AND 0042000085 TUKWILA, WASHINGTON prepared for: DON LEABO by: BERGQUIST ENGINEERING SERVICES BES PROJECT NUMBER: 200212 - REPORT 1 OCTOBER 11, 2002 1. INTRODUCTION This report presents the results of our geotechnical exploration for the proposed seven residential buildings, five of which will be constructed at 4310 - 4320 S 150th Street in Tukwila, Washington. Two of the buildings already exist on the properties and will remain. The location of the site is shown on the Vicinity Map on page Al in the Appendix of this report. The geotechnical exploration was performed by Bergquist Engineering Services (BES) to provide information or recommendations regarding: • seismic design considerations including liquefaction potential, • allowable bearing capacity and depth of suitable foundation systems with estimated settlements, • lateral earth pressures and friction coefficients, • influence of groundwater on the development, • site preparation, and • excavation slope considerations. Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212 -Report 1 Mr. Don Leabo orally authorized our work on September 30, 2002 and was on -site during the exploration phase of the project. 2. PROJECT DESCRIPTION The project involves design and construction of five, two -story, single- family, residential buildings. A 186 -foot long, 72 -inch diameter corrugated - metal -pipe (CMP) will be buried beneath the planned entrance drive for stormwater detention. The proposed configuration of the existing and planned buildings and the location of the CMP is shown on page A2 in the Appendix of this report. The wood- framed buildings will not have basements and it is anticipated that they will be founded on conventional, cast -in -place concrete foundations. Actual foundation Toads were not provided at the time this report was prepared. Therefore, we have assumed that individual column loads will not exceed 60 kips and continuous wall loads will not exceed 3 kips per lineal foot. If the actual foundation loads are greater than those stated herein, the geotechnical engineer must be notified to determine whether the recommendations presented herein require revision. 3. SCOPE OF SERVICES The scope of services included a reconnaissance of the site by the geotechnical engineer, a review of geologic literature, logging and sampling six test pits, engineering analysis, and preparation of this report. Soil samples were taken at the intervals noted on the individual test pit Togs, which are presented in the Appendix on pages A3, A4, and A5 of this report. Except for Test Pit 1, the test pits were immediately backfilled with the excavated site -soils upon completion. Test Pit 1 was left open for an hour to determine whether groundwater was present. The approximate ground surface elevations presented on the test pit logs were interpolated from a topographic drawing prepared by Schroeter Surveying of Seahurst, Washington. The soil samples were returned to our laboratory for analysis, which included visual classification and determination of the natural moisture content of select samples. The field and laboratory data were then evaluated by the geotechnical engineer relative to the proposed construction. The engineering recommendations and advice presented in this Bergquist Engineering Services Page 2 of 10 Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212- Report 1 report have been made in accordance with generally accepted geotechnical- engineering practices in the area. 4. SITE CHARACTERIZATION The information presented in this section was gathered by BES personnel for geotechnical engineering purposes only. This site characterization was not intended to address the presence or likelihood of contamination on or around the site. Specialized methods and procedures, which were not a part of this scope of services, are required for an adequate environmental site assessment. 4.1 Surface A one -story, wood- framed residential building exists in the southwest corner of the site. A two -story, wood - framed residential building exists near the east center of the site. These buildings will remain. A wood - framed garage just west of the existing, two -story house will be razed and anew garage will be constructed northeast of the old location. The surface of the site generally slopes down from a high elevation of about 238' along the north side of the site to a low elevation of about 220' at the south end of the site. The surface of the site not covered with buildings or pavement is generally covered with grass and weeds. Numerous fruit, conifer, and deciduous trees exist on the site. 4.3 Subsurface Soil and Groundwater The subsurface soil and groundwater conditions at this site are described in the following paragraphs and are presented graphically on the test pit logs in the Appendix of this report. The stratification lines, indicated on the test pit logs, represent the approximate boundaries between soil types. Actual boundaries may be gradual and the transitions may not be easily discernible during site excavation. In general, most of the site is covered with a roughly six -inch thick layer of brown, loose, Silty SAND (SM) with gravel with roots (topsoil). The topsoil on the eastern two- thirds of the site (represented by Test Pits 1, 2, 3, and 4) is generally underlain with dense to very dense Silty SAND (SM) to Sandy SILT (ML). Brown, dense, Silty SAND with roots and sheet metal debris Bergquist Engineering Services Page 3 of 10 Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212- Report 1 was encountered to a depth of about two and one -half feet in Test Pit 1. Underlying the fill in Test Pit 1 and only in Test Pit 1, a one - foot -thick layer of dark brown, woody PEAT (PT) with a natural moisture content of 101.3 percent was encountered. Gray, very stiff SILT (ML) was encountered from a depth of about three and one -half and three feet to the termination depth of the test pit at a depth of four feet. Test pit 4 was excavated to a depth of eight feet below the ground surface to explore the subsurface soils and groundwater conditions in the vicinity of the detention pipe. The subsurface soils are predominantly Silty SAND with gravel, occasional cobbles. Groundwater was not encountered in this or any of the other test pits. The topsoil on the western third of the site (represented by Test Pits 5 and 6) is underlain by light brown, medium dense, Silty SAND (SM) to fine Sandy SILT (ML) or brown, very dense GRAVEL -SAND (GP) to a depth of two to three feet. From a depth of two -to three feet and extending to the termination depth of the test pit, brown and gray mottled reddish brown, medium dense to dense, fine SAND (SP). Groundwater was not encountered in any of the test pits. Groundwater readings in granular soils are generally accurate even after short periods of observation. Whereas, the groundwater level in fine - grained (silt and clay) soils may require several days of observation before it becomes stable and accurate. 5. DISCUSSION The recommendations presented in this report are based on our understanding of the project as presented in the Project Description Section and on the assumption that the subsurface conditions encountered in the test pits adequately represent conditions near and between the exploratory test pits. Because project conditions regarding type and location of structures and foundation loads can change and because subsurface conditions are not always similar to those encountered in the test pits, the geotechnical engineer must be contacted for review and possible revision of the recommendations if discrepancies are noticed. Bergquist Engineering Services Page 4 of 10 Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212- Report 1 6. RECOMMENDATIONS The following sections present recommendations regarding seismic considerations, foundations, lateral earth pressures, and for earthwork, excavations, drainage, and groundwater. 6.1 Seismic Considerations According to Figure No. 16 -2 of the 1997 Uniform Building Code' (UBC), the project site is in Seismic Zone 3. According to Table 16 -J of the UBC, the soil profile at this site is best represented by a "Soil Profile Type SD" (Stiff Soil). The site soils are not susceptible to liquefaction and therefore exhibit minimum seismic risk. 6.2 Foundations Conventional spread footing foundations may be used to support the proposed structures. Spread footing (continuous wall and individual column) foundations may be dimensioned using a net allowable bearing capacity of up to 2,000 psf if they are placed in the organic - free, undisturbed, dense Silty SAND (SM) encountered at a depth of one to three feet below the ground surface or on properly placed and compacted structural fill. Where any soft or compressible soils are encountered, such as the PEAT in Test Pit 1, they should be removed and replaced with structural backfill, or the foundation should be extended to rest on suitable, undisturbed soils. The recommended minimum dimension for continuous wall footings is 18 inches and for individual column footings, the recommended minimum dimension is 24 inches. All perimeter footings should be placed at least 18 inches below. finished grade for frost protection. The allowable bearing capacities may be increased by one -third for wind and seismic loads. If the recommendations in this report are followed, total settlement of the foundation will be less than one inch (1 inch) with differential settlements of less than three - quarters of an inch (3/4 inch.) Lateral earth pressures for design of foundations or short retaining walls with level backfill and without hydrostatic pressures or surcharge loads, may be calculated using the equivalent fluid pressures presented below: Bergquist Engineering Services Page 5 of 10 - Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212- Report 1 Active: Undisturbed subsoils 40 psf /ft. Compacted granular soils 35 psf /ft. Passive: Continuous footings 250 psf /ft. Column footings 300 psf /ft. An ultimate coefficient of friction between footings and bearing soils of 0.35 may be used to resist lateral foundation loads. If passive earth pressures are used in conjunction with base friction to resist lateral loads, reduce the ultimate coefficient of friction to 0.30. A factor of safety of 1.5 should be applied to these values. Footings, stem walls, and retaining walls should be reinforced to reduce the potential for distress caused by differential foundation movements. A qualified engineer should determine the size, quantity, and location of reinforcement. All footing excavations at this site should be inspected by the geotechnical engineer prior to placement of construction forms and reinforcement steel. 6.3 Slabs -on -Grade Slabs -on -grade should be supported on a minimum four -inch thick, free - draining sand or gravel base that follows gradation and compaction recommendations provided in Table 6.1 of this report. All - concrete, especially slabs -on- grade, should be placed at minimum water - cement ratios on moistened surfaces and properly cured to minimize shrinkage, cracking, warping, and curling. Concrete slabs should be allowed to cure adequately before subjecting them to full design loads. Any concrete that will be exposed to the elements should be entrained with four to six percent air to minimize damage from freeze -thaw cycles Polyethylene sheeting should be placed on the granular base to act as a vapor barrier. A two- to four -inch thick layer of sand maybe placed over the vapor barrier to improve concrete curing. If provided, floor coverings should not be placed until the concrete floor has cured sufficiently. 6.4 Earthwork The recommendations presented in this report are predicated on fulfillment of the following earthwork recommendations. Bergquist Engineering Services Page 6 of 10 Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212- Report 1 6.4.1 Site Clearing: Strip and remove any tree stumps, roots larger than three - eighths- (3/8) inch in diameter, weeds, forest duff, and any other deleterious materials from the project area prior to construction. Based on the test pit information, an estimated an average thickness of topsoil is about six inches, however, there are areas where dense root matter extends to a depth of two feet. After site clearing, the exposed surface should be graded relatively flat to allow for proper subgrade preparation but sloped slightly to allow good surface drainage during construction. 6.4.2 Excavation: Conventional- excavating equipment should be suitable for the proposed shallow foundation excavations. Deeper excavations may require a more powerful, trackhoe- type excavator for improved production. Use excavating buckets without teeth to excavate all foundations so as not to disturb the bearing surfaces. If the surfaces are disturbed, the loose soils should be carefully removed to expose the underlying, undisturbed soils. According to Chapter 296 -155, Part N of the Safety Standards for Construction Work in the State of Washington, the site soils classify as Type C. Therefore, side slopes of excavations deeper than four (4) feet should be no steeper than one and one -half (1.5) horizontal to one (1) vertical (1.5H:1V). If the dimensions of the site prevent the use of maximum slopes of 1.5H:1V, the slopes must be stabilized or shored to facilitate safe excavations. The geotechnical engineer should be contacted for additional recommendations if such techniques are going to be employed. - 6.4.3 Foundation Preparation: Except in the vicinity of Test Pit 1, specialized treatment of the foundation soils is not anticipated at this site. The excavations, however, should be made carefully using a backhoe bucket without teeth so as not to disturb the bearing soils. If loose, soft, or organic -rich soils are encountered at the footing elevation, they should be removed and replaced with properly compacted backfill using material and procedures described in Sections 6.4.5 and 6.4.6 of this report. 6.4.4 Slab -on -Grade Preparation: If the earthwork recommendations provided in this report are followed, specialized treatment of the soil beneath slabs -on -grade at this site is not expected to be necessary. However, if loose, soft, or organic -rich soils are encountered at the floor subgrade elevation they should be removed and replaced with properly compacted backfill using material and procedures described in Sections 6.4.5 and 6.4.6 of this report. Bergquist Engineering Services Page 7 of 10 Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212 -Report 1 These report sections should be followed if fill is required to achieve design subgrade elevation. 6.4.5 Materials: The on -site organic -rich Silty SAND (SM) to Sandy SILT (ML) soils are moisture sensitive and may be difficult to work during wet weather conditions. There are, however, GRAVEL -SAND (GP) deposits beneath the site that are not moisture sensitive. Accordingly, it may be possible to segregate the all- weather material for reuse during excavation of the site. If additional soil is need for structural fill or backfill to meet design grades, it should be imported and conform to the gradation presented in Table 6.1, and be approved by the geotechnical engineer prior to use. Samples must be submitted to the geotechnical engineer at least 72 hours before approval is required and before the materials are used. Gravel base and select materials for pavement subgrade should conform to local governmental standards, such as City of Tukwila, King County, or other suitable specifications approved by the geotechnical engineer. TABLE 6.1 GRADATION REQUIREMENTS FOR STRUCTURAL FILL } r uA ',,. w S:�aStandard\Sieve P' e�z rc en P assing ,k � tt ov �1K f 3 -inch 100 3/4 -inch 50 -100 No. 4 25 -65 No. 10 10 -50 No. 40 0 -20 No. 200 0 -5* *Note: The percent passing the No. 200 sieve is based on the weight of the material passing the 3/4 -inch sieve. If construction is performed during the wet season, a granular base or work blanket may be required. Granular materials used as a work blanket should conform to the gradation presented in Table 6.2, and be approved by the geotechnical engineer prior to use. Bergquist Engineering Services Page 8 of 10 Proposed Residential Development Tukwila, Washington October 11, 2002 BES Project Number 200212 -Report 1 RADATION REQUIREMENTS FOR WORK BLANKET �, ,:y„'e -.yr ';y ". +�e.2?;i�F 'S` ? S�' f: <re ��i¢. #,�C }. �cttt ' i 7� �,+ .�; Ym U; S Standard;Sie�e , ^�' ..1,.;r ,5!r .. .i�F 4 {.,_ ,.� v1 ,. LFercentbPassing 100 4 -inch No. 200 5 maximum* *Note: The percent passing the No. 200 sieve is based on the weight of the material passing the 3/4 -inch sieve. 6.4.6 Placement and Compaction: Structural fill and structural backfill should be placed in relatively horizontal loose lifts not exceeding ten (10) inches in thickness and compacted to at least 95 percent of the modified Proctor (ASTM 1557) maximum density at moisture contents within two (2) percent of optimum. Structural fill / backfill should be placed under the full -time observation of a representative of the geotechnical engineer, and the specified compacted density and moisture content of each lift should be verified by test, prior to placement of subsequent lifts. Placement on frozen ground should not be attempted. 6.5 Drainage Good drainage is considered critical to the performance of earth - supported structures such as foundations and retaining walls. Therefore, construction grades and final site grades should be designed to prevent water from ponding in areas on or adjacent to foundations, slabs -on- grade, and pavements. Infiltration of water into foundation and utility excavations should be prevented during construction and throughout the life of the project. A perimeter footing drain - system consisting of a perforated pipe surrounded by at least six inches of pea gravel is recommended. The pea gravel should be separated from the surrounding soil by a filter fabric. The collected water should be tight -lined away from the building to a suitable discharge system but not discharged onto the top of the adjacent slope. Roof and surface drains should be provided but they not should be connected to the footing - drain system. A schematic of a footing -drain system is presented in the Appendix of this report. Bergquist Engineering Services Page 9 of 10 Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212 -Report 1 Where pavement does not immediately abut structures, slopes, with an outfall of at least three. (3) percent for a minimum distance of five (5) feet from exterior footings, should be provided. During construction, silt fences should be used to prevent migration of fine - grained soils off site especially along property line to the north where there is a designated wetland. 6.6 Groundwater Groundwater was not encountered in any of the test pits at this site. Therefore, groundwater will not be an issue for this project. 6.7 Construction Observation and Testing The recommendations presented in this report rely on adequate observation and testing of construction materials and procedures by the geotechnical engineer or his qualified representative. At a minimum, the testing program should include: • Observation and review of site clearing and review of all foundation excavations to evaluate whether actual conditions are consistent with those encountered during exploration. -- • Observation and testing of placement and compaction of all fill and backfill materials to evaluate compliance with specifications. • Field inspection and laboratory testing of materials and field inspection of methods as required by the appropriate Uniform Building Code. Typically, this includes inspection of placement of reinforcing steel, inspection and testing of portland cement concrete to evaluate compliance with specifications regarding slump, temperature, air content, and strength. 7. REPORT LIMITATIONS The recommendations presented in this report are for the exclusive use of Mr. Don Leabo for the proposed single - family residential development to be constructed at 4310 to 4320 150th Street in Tukwila, Washington (King County Tax Lot Numbers 0042000086 and 0045000085. The recommendations are based on the subsurface information obtained by Bergquist Engineering Services Page 10 of 10 Proposed Residential Development October 11, 2002 Tukwila, Washington BES Project Number 200212 -Report 1 Bergquist Engineering Services (BES) and on design details provided by Don Leabo and a site drawing prepared by Jaeger Engineering. If there are any revisions to the plans or if deviations from the subsurface conditions noted in this report are encountered during construction, BES should be notified immediately to determine whether changes to the foundation recommendations are required. After the plans and specifications are more complete, the geotechnical engineer should be provided the opportunity to review them to check that these engineering recommendations have been interpreted properly. oOo Bergquist Engineering Services Page 11 of 10 Al RI tol • Lust sr ''. j \v, Poo klegb Jima Pl. 4 ., 11. 4 tf �'�1�� -.- y i � "4 ®S 133 i=i s 1 9 4� murmur "(o PAIBT, is, .l..:J a �. S ,' 5T5",.. f -4•,,,.., a' PAC' � •sfl.° p• -4! , e ., 1 ` ' 1 •p b{ KI 6 -'�n N 1 5 135TH £. , 10 ! 1 \.J�` x ),4' %��U tST Q33 :•.. „----4--- r F,�G rt N� — N∎��jj,, R TH i sT J S .p ... +�. it . S • ST.... C —_ ST LIB. v 000 146TH \ a'5,�6 144TH/ �� @.s��r• i 5 ® FOSTER a5 h m 3 _ 142' S �; a s1 1 y ST ,•f!? n a 4 sr �e ..S 1 3R0 I TN 5T , Fes - s LAVr a 1,' � A k. yi : �'r ?�,*,. - \��� / \` , r ` �Y ,_, y 148 ST - ® p rr � sr J F l� , 1 � � � ��' B s DEA7 PAtLK � .� MISTS — p; Q 4200 y C 22 b T}! 4200 Ft 'S_ 4I 2 4 YV< ST 4y t ' - i �} 1 M. N',,; `i ,{ .c *�. 4A ,�'0 .. —16417 3 � < ,Sj 151ST a = ,n stop ® ST h RN D ,. N if, _ 152ND ST y H sl S 152ND PL \ 9S 518- 153RD b���L" - tW "i'N �Sj a A / A i ,l -” - Aiellil !J1T rU N�I 60TH N ,' I `, •,_ SOIITNCEATER r n }p F ® ©, : HALL PKWY ,�g�/�5'', SULK g • Cfr 0?ES7YIEk PARC S 163 ra BAKER - BLVD W ; > ' o 7 Q ...,. 1 7nIFL`1� = - . - s . 164TH sr IP STRANDER BLVD ,� , a � . S 147TH ST" 11LN/ill x ®CC R °C > A . \� 51667N5T ,��T 5 .. el =SI uc . o PLAZA = 26 RV TRECK t a IND U'r�+ / ®1 DR 4 sr 0E SOH la 5 'Tam II '. va VICINITY MAP Project Name: Seven Residential Buildings _ Bergquist Engineering Services For: Don Leabo BES Project Number: 200212 -1 Location: Tukwila, Washington Date: October 2002 Al 238. 234' 2.30' 18 85.18 - -234 o 192.85' 10 -v'�a� ��a peace �.. • POTENTIAL MOUSE FOOTPRINT (TYP) TP -2 4 11552 SF ;ti„ r- 2 8234 SF \ 1 1 1 DRIVEWAY 253, — 234 234' r p�INE I °"--i'L- -DETENTION PIPE ACCESS RISER 1 NEW 20' 1 1 x 20' 1 1 GARAGE 1 _L —__J 75.00 EASEMENT 39 (OOTENTIAN PPE AND WETV sr 186 1.i DF 7r OIA. CUP DET. %LU NE; 2217 CF WETVAU.T VOL 3047 CF 901' 8 IEXIST. DRIVEWAY TO REMAIN (. 1(P Y,.. 19.14' 2—I — T 12 TTER ^�� j FLOW LINE _ t 955`,4 SF Existing Mouse #4320 62.T P- --""I t 22.60 rAM.5 T . I& UTIUTY (EASEMENT 8 - 36.52' — 6 8932.5 SF o. -'1 r 4mst D11n •518 - — — C) k Wrr t1 "1"OOrb d.' . golf 57' -12' CPEP • 5.61% r I 1 1 6505 SF t r• t 1 1 1 DRIVEWAY ±DRIVEWAY + YARD DRAIN T8 ci7T , — — 7 to 192.76' CM u 8a�. e,. Cunt- rut \ y "e;, �• t-- 20' GRAPHIC SCALE 20 10 m 40 10 SITE PLAN Project Name: Seven Residential Buildings Location: Tukwila, Washington Date: October 2002 Bergquist Engineering Services For: Don Leabo BES Project Number: 200212 -1 Project: Seven Residenlial Buildings Location: Tukwila, Washington BE3 Project No.:2002l2'l Date Excavated: September 30, 2002 Log of Test Pit 1 Excavation Rig: Kobelco 860 Back-hoe Logged By: R. A. Bergquist, P.E. Approximate Ground Surface Elevation: 231' Project: Seven Residential Buildings Location: Tukwila, Washington BES Project No.: 200212-1 Date Excavated: September 30, 2002 Log of Test Pit 2 Excavation Rig: Kobelco 860 Back-hoe Logged By: R. A. Bergquist, PE Approximate Ground Surface Elevation: 232' Mi ott7 _ _2_ 3 – – 4 - BS 8S2 BS3 - SM PT ML - 6] 101.3 29.1 Brown, loose, Silt with _gravel, with roots - _ _ _ Brown, ��5i��NOw�mo�����me�| ' (Probable Fill) _2_ – -�- Dark brown with – – Gray, very stiff, SILT 4 _5_ _d_ _7_ END OF TEST PIT Dry at complelion. _�_ _ 6_ 7_ . END OF TEST PIT. Dry at cornpetion and one hour after completion. _5_ _d_ 7 Project: Seven Residential Buildings Location: Tukwila, Washington BES Project No.: 200212-1 Date Excavated: September 30, 2002 Log of Test Pit 2 Excavation Rig: Kobelco 860 Back-hoe Logged By: R. A. Bergquist, PE Approximate Ground Surface Elevation: 232' h %$s r » \/ b� o t t / /(� P c r a+ >a »a 1 - – 2 – – 3 85l BS2 BS3 SW ML ML 12.2 77 22.7 Brown, loose, Silty SAND, with gravel, with roots I- __ Brown, medium Sandy occasional ' ---' —' gravel, 2 cobble – – ] Gray, "e�oUR.8[[w�`c�" _5_ _b_ _7_ END OF TEST PIT Dry at complelion. _�_ _ 6_ 7_ Project: Seven Residential Buildings Location: Tukwila, Washington BES Project No.: 200212 -1 Date Excavated: September 30, 2002 Log of Test Pit 3 Excavation Rig: Kobelco 860 Back -hoe Logged By: R. A. Bergquist, P.E. Approximate Ground Surface Elevation: 229' ti it .� .� =S 4�i)5 : t s. ; ' k \ �µ 1 N. O�LA` 1c'aN $q c % o ¥n \ecn �i4}�� '. Y tr c. ) - ''' 5].y M,*W itN �Ak r .y ii'. trpl"si ,'>-. - P; �i t9 }.try3 /�r1 '�7'F' .,�1I K �'. {� 1' ! f v°C �3� iy2}._ .�'. -y ,1. �C�[^.. �, � ..Hh'�'K2 ty�^R �: ® escnphon!ond,U J C ='S Classificahon .j) q,5,�n'� •th 1�( l .L 5, �, Y ,ry fir 9 y Y C z'f }✓' 1G.• � SM ln ms, +4� .e r •t x.o-F �l �r. "I''', �� .4 f: .. �'!t'.,)r.13,�}}'p'A� .f ^(�.. "')` .. .yt ,at v i Tesa ,1�Yx� ". tt + Ahjlf {Y t Ike .:`.y: f iHLf .v.� 1- .,: .l•�e .. ..rte" .... ..., ?'.'§ t.. _1_ - SM -- Brown, loose to medium dense, SAND -SILT, trace gravel, thick roots _1_ _2_ 3 4 _ 2 —3— BS1 SM 6.1 Brown, very dense, Silty SAND, with gravel, with cobbles —3— 4 5 4 6 - END OF TEST PIT _7_ _5_ _7_ Dry at completion. _5_ 6 8 END OF TEST PIT. Dry at completion. 6 Project: Seven Residential Buildings Location: Tukwila, Washington BES Project No.: 200212 -1 Date Excavated: September 30, 2002 Log of Test Pit 4 Excavation Rig: Kobelco 860 Back -hoe Logged By: R. A. Bergquist, PE Approximate Ground Surface Elevation: 230' � ;l�Fp. ! s ). isJ +. t 1 :a i O . 0} i �' ) ) �� ) L�J -S :Q diem �t _ .CD J ! �Z� ... YQ-r x+ s a,. c 'c In )O ... .:.' SC'1't,e ttr� t�''r k" es. ' � C U S' i y {�. N3 >.›...:.. } y, n aq y .G.'.. ..�•:"a... ..A .' ..1 1 i� C e.r? ) D " N U _ 'c' ` 'O Or mt' L- i ..,2 fC'r ..J^ . rim�yy J,{ ,}} '. t� j. '(D, vlt..e? k i ; lL1 Fi�� f�, �`y` ^ =t � drl ~� NnY yy.� {.:�1 A .,, ! k.. e^: ! „y. � Li , ✓. I f ? tNi Td'' k•. v k�glp)1i`;}, f, is >3. w t j 7 Descnphonaand<'U:S C.S Classification ayF}'"dn i% x `t': tr '� ..s `T r eu d x?>• ' �,k ,.�,1° .� x, �. f 0.vyy �F� i1 Y ,X '4{ "• !K` 1 ll i .1 hFi✓. A' 1 +Yf � <)i I. +. « f Q. tif.; t it' f V'}5�'KTt' i �ix4 t i . fa 4 7 t A ie' e.ir .1�i J s- . ?�,r �Y "'}�+�11 "k^�3'.' ,, (h. a i ®, t r' Sv ^yam f �. ) .f .I"4- t ,£ r3�.. � ". "..'� �` ... ..v ., ti' t'i�:.S,��i.. -- SM -- Brown, loose, Sil SAND, with gravel, with roots _1_ _1_ 2 2 3 3 4 BS) SM 19.7 Brown, dense to very desne, Silty SAND, with gravel, —4— 5 occasional cobbles (Becomes gray at about seven feet) 5 6 - 6 _7_ _7_ _8_ 8 END OF TEST PIT. Dry at completion. A4 Project: Seven Residential Buildings Location: Tukwila, Washington BES Project No.: 200212 -1 Date Excavated: September 30, 2002 Log of Test Pit 5 Excavation Rig: Kobelco 860 Back -hoe Logged By: R. A. Bergquist, P.E. Approximate Ground Surface Elevation: 229' �''!.:'j f'( W ,,.y. P,{+,�. [, L >r" ii v �. ��'�d3Erpz. A.i' .',. 'ai b-ly '„ � c-(Qi ��i:�Y'i °+t� �1Tia .. 1 p.7£. t sm 4"rr,r Via Zj 4'.. 4C C4N'J�. �.n.) � t G 'L Y T 54y�yIn.. pO R J; 4 <� , U ' r ,Ny ��tn , , C{, .12 5, Jam. '�.CJ 'f zy_ m.. C ct :, Y(?k m.b� iFP�Kb N� c` a '• Y L t �, U d: �,,,. a w _ i Y2 t t vbif"Lti,�.! dy� J��.�.t i.{r , t, +31 °(�•:T -�v t ? G. -, 7' W^Y`L�§"!} C 4�:1 -1y y)•t', P YjN K4 F•7 ' Y� j ,C F ig..q':•k`` j s F ��,( :� '!7"'L S 9* .a' .•iJl `C�'t .Hrt3 ) " .i.�i kj �• �.-S. ,. rq 1�.. { ' I Description and�U S C '3S • 'Classi lea on , ^ f a s sir y,Artt �. d z .y.� a� , i� r� ^ f7k' � { x Fu i�.r.. 4,.i c }. �. '°' 9 fg.. Yy'r. --�}t, u. -3'.4� xt�' R - _r , -. •�i1 - ?' yx'� L. . ;•fni 0..;..,..' ':}.e _.�, l''''. '.�':.. J 'i-. ...t4 *,- :!,.. . .:'wi:�.:T .a.. -..0 •.,+A..e . ..�'.2e.Y ;, I. >.1..F f :vs. �v ..i ..fi.. _- -- 1 _1_ -- GP _1_ 2 -- SM -- Light brown, medium dense, Silty SAND to fine Sandy SILT -2_ 3 SP -- Brown and gray mottled reddish brown, medium dense to 3 dense, fine SAND 4 3 -4- BS1 SP 7.4 Brown mottled reddish brown and gray, medium dense to dense, fine SAND, occasional gravel _4_ 5 Dry at completion. _5_ 6 5 _6_ 7 END OF TEST PIT 6 Dry at completion. Project: Seven Residential Buildings Location: Tukwila, Washington BES Project No.: 200212 -1 Date Excavated: September 30, 2002 Log of Test Pit 6 Excavation Rig: Kobelco 860 Back -hoe Logged By: R. A. Bergquist, PE Approximate Ground Surface Elevation: 233' e t ( e { N" §$ . 9 @/1 a $° .,� ..�. U -.� s J N _a>-" 2, h q' a,, Y Mot e \ � �a`a` 1• .:�:� �.�i yX`�. '� ; _ Ft' t�: b D escription and U S CS Classification �, t ,��Y` may.. r °, r. S r 'YC ' i, r f �`� y7tt. y ✓ t 9 _ '. - ..1'.,' -- SM -- Brown, loose, Silty SAND, with gravel, with roots _1_ _1_ -- GP -- Brown, very dense, GRAVEL -SAND _2_ - 2 SP -- Brown and gray mottled reddish brown, medium dense to 3 dense, fine SAND 4 4 END OF TEST PIT _5_ Dry at completion. _5_ 6 _6_ 7 7 A5 TEST PIT LOG NOTES. These notes and test pit Togs are intended for use with this geotechnical report for the purposes and project described therein. The test pit logs depict BES's interpretation of subsurface conditions at the location of the test pit on the date noted. Subsurface conditions may vary, and groundwater levels may change because of seasonal or numerous other factors. Accordingly, the test pit logs should not be made a part of construction plans or be used to define construction conditions. The approximate locations of the test pits are shown on the Site Plan. The test pits were located in the field by measuring from existing site features. "Sample Type" refers to the sampling method and equipment used during exploration where: "BS" indicates a bulk sample taken from the ground surface or from the backhoe bucket. "Moisture Content" refers to the moisture content of the soil expressed in percent by weight as determined in the laboratory. "Description and Classification" refer to the materials encountered in the test pit. The descriptions and classifications are generally based on visual examination in the field and laboratory. Where noted, laboratory tests were performed to determine the soil classification. The terms and symbols used in the test pit logs are in general accordance with the Unified Soil Classification System. Laboratory tests are performed in general accordance with applicable procedures described by the American Society for Testing and Materials. " Indicates approximate location of water seepage at the time noted. 7" Indicates location of groundwater at the time noted. TERMS for RELATIVE DENSITY of NON - COHESIVE SOIL Term Standard Penetration Resistance "N" Very Loose 4 or less Loose 5 to 10 Medium Dense 11 to 30 Dense 31 to 50 Very Dense Over 50 blows /foot A6 UNIFIED SOIL CLASSIFICATION SYSTEM (USCS) COARSE GRAINED SOILS (Less than 50% fines. Fines are soils passing the # 200 sieve.) GROUP SYMBOL DESCRIPTION MAJOR DIVISIONS GW Well- graded GRAVELS or GRAVEL -SAND mixtures, less than 5% fines. . GRAVELS More than half of coarse fraction is larger than No. 4 sieve. GP Poorly graded GRAVELS or GRAVEL -SAND mixtures, less than 5% fines. GM Silty GRAVELS, GRAVEL - SAND -SILT mixtures, more than 12% fines. GC Clayey GRAVELS, GRAVEL- SAND -SILT mixtures, more than 12% fines. SW Well- graded SANDS or Gravelly SANDS mixtures, less than 5% fines. SANDS More than half of coarse fraction is smaller than No. 4 sieve. SP Poorly graded SANDS or Gravelly SANDS mixtures, less than 5% fines. SM Silty SANDS, SAND -SILT mixtures, more than 12% fines. S� Clayey SANDS, SAND -CLAY mixtures, more than 12% fines Note: Coarse - grained so Is receive dual symbols if they contain between 5 and 12 percent fines. FINE- GRAINED SOILS (More than 50% fines. Fines are materials passing the # 200 sieve) GROUP SYMBOL - DESCRIPTION MAJOR DIVISIONS ML Inorganic SILTS, very fine SANDS, ROCK FLOUR, Silty or Clayey SANDS SILTS and CLAYS Liquid limit less than 50 CL Inorganic CLAYS of low to medium plasticity, Gravelly CLAYS, Sandy CLAYS, Silty CLAYS, Lean CLAYS OL Organic SILTS, or organic Silty CLAYS of low plasticity MH Inorganic SILTS, Micaceous or Diatomaceous fine SANDS or SILTS, Elastic SILTS SILTS and CLAYS Liquid limit greater than 50 CH Inorganic CLAYS of high plasticity, fat CLAYS OH Organic CLAYS of medium to high plasticity PT PEAT, MUCK, and other highly organic soils Highly organic soils Note: Fine - grained soils receive dual symbols if their limits plot left of the "A" Line and have a plasticity index (PI) of 4 to 7 percent. UNIFIED SOIL CLASSIFICATION SYSTEM Bergquist Engineering Services A8 Exterior Grade. Sloped Away from Building Tightline Roof Drain`s Nonwoven, Needle Punched or Spunbound, Filter Fabric (MIRAFI 140N or Better) Minimum 6" thick wrap of washed gravel Rigid, 4" Diameter, Perforated PVC Pipe (Perforations Facing Down) Footing r<« SCHEMATIC OF FOOTING DRAIN Project Name: Proposed Residential - Development Location: Tukwila, WA Date: October 2002 Bergquist Engineering Services For: Don Leabo BES Project Number: 200212 -1 A9 NOTES BOON RAFFIC OO H O M L l`�QG T PROJECT SUBJECT • S, k--fr. ! ( t •HEET: / OF BY:7- DATE ()/z /c1z- CHECKED DATE JOB NO. O z — (`t( Pk`f-ty 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339 -8266 • FAX: (425) 258 -2922 aMON RAFFIC OHOULMRIVO PROJECT SUBJECT 0 7- f •HEET: BY: CHECKED JOB NO. I "7 OF DATE DATE 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339-8266 • FAX: (425) 258-2922 ° O oOl1V • RAFFIC OO aMML4QRTTO PROJECT SUBJECT Le,--b0 7- f- slyer( P likHEET: OF J BY: �'6- DATEfc/ Z/° z- CHECKED DATE JOB NO. c` Z — /`/-f 5� Pkfs .., 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339 -8266 • FAX: (425) 258 -2922 9MOON RAFFIC OMR:IMAM PROJECT SUBJECT t170 7- • EET: OF :s.. BY: 77---6-- DATE CHECKED DATE JOB NO. 0 Z — Pii-1 5 4,- Pkf y 7 - 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339-8266 • FAX: (425) 258-2922' aMON RAFFIC OHOULURTIV, PROJECT LL0 7- f Pk-t likHEET: OF BY: T—(7-- DATE fc/Z/":1---- CHECKED DATE SUBJECT 191,-z+-cy - JOB NO. (-)Z 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339-8266 • FAX: (425) 258-2922 9oo60N • -RAFFIC OHOULURTM PROJECT SUBJECT OHEET: OF ). BY: — DATE fLY2 /c' CHECKED DATE JOB NO. Z — /i( Si P -ky 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339 -8266 • FAX: (425) 258 -2922 dESON • RAFFIC OHOULMINTS PROJECT SUBJECT Lebo 7-1,f YL- P( Si P1-,+-t3 77-6-- OF BY: DATE CHECKED DATE JOB NO. (3 • " Na,■••.• 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339-8266 • FAX: (425) 258-2922 aESON RAFFIC CHBULVAHVO PROJECT SUBJECT L0 7- Pkt •SHEET: OF BY: DATE fc/z/c-• 1-- DATE CHECKED JOB NO. L.— (Z -/‘t( NOTICE OF OF LAND USE ACTION Type of Action: SHORT PLAT & SEPA Project Name: LEABO 7 LOT SHORT PLAT Site Address: 4310 & 4320 SOUTH 150TH STREET Applicant: DON LEABO Notice of Application Public Notice TO SUBMIT COMMENTS OR OBTAIN ADDITIONAL INFORMATION PLEASE CONTACT THE PROJECT PLANNER AT (206) 431-3670 Tukwila Planning Department 6300 Southcenter Blvd. mkwars WA 98188 1712 PACIFIC AVENUE • SUITE 100 • EVERETT, WA 98201 • PH: (425) 339-8266 • FAX: (425) 258-2922 7. • f Cizy of Tukwila Steven M. Mullet, Mayor Department of Community Development Steve Lancaster, Director September 24, 2002 Mr. Don Leabo Greenridge Homes 6855 176th N.E. #235 Redmond, WA 98052 VIA FAX 425 - 558 -2032 Re: Leabo 7 -Lot Short Plat 4310 & 4320 South 150th Street Tax Parcel 004200 -0085 Tax Parcel 004200 -0086 L02 -037 (Short Plat) E02 -018 (SEPA) Dear Mr. Leabo: We have completed a detailed review of your SEPA and Short Plat applications. Certain additional information is needed from you to ensure that the project meets the substantive requirements of the City and to complete our review process. We have the following comments: SEPA comments — Public Works: 1. This project will generate more than five additional peak hour trips, thereby triggering a traffic impact analysis. Please contact Cyndy Knighton, Senior Engineer, Public Works at 206.433.0179 for the scope of the analysis. Short Plat Comments — Public Works: 2. The Public Works Department is aware of conditions that exist on the properties to the north, northeast and east of this site. The hydrology and site conditions experienced during construction of the house directly north and abutting required significant excavation and complete redesign of the foundation. To protect you and to better assess the short plat design and subsequent construction, Public Works requires a full geotechnical report per the enclosed guidelines. In addition to the information spelled out in the guidelines, the report shall specifically address the subsurface conditions for the lots on the north of the short plat and shall also include recommendations for foundation design for new single family residences which would be built on these lots. This geotechnical report must also provide a feasibility evaluation required by the King County Surface Water Design Manual, Chapter 5. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: 206 - 431 -3670 • Fax: 206 - 431 -3665 Mr. Don Leabo September 24, 2002 Page 2 COURTESY COMMENTS Although the following items (Items 3 through 12) are not required at this time, you may wish to begin gathering and preparing documentation associated with these requirements. Courtesy Comments — Fire Department The following requirement will be shown as a condition of preliminary approval of the short plat: 3. Prior to the development of proposed Lots 2, 3 and 4, the following will be required. There must be a fire hydrant within 250 feet of all building sites. If there is no fire hydrant within 250 feet of all building sites or the fire hydrant is not capable of a 1,000 gallon per minute flow, the future houses on Lots 2, 3 and 4 will be required to provide interior sprinklers to be approved by the Fire Department. This requirement must be stated on the face of the plat to be recorded and must be met prior to issuance of any building permits for Lost 2, 3 and 4. PLEASE NOTE: the existing house located on proposed Lot 5 is exempt from this requirement. Courtesy Comments — Planning: The following requirements will be shown as a condition of preliminary approval of the short plat: 4. Per TMC 17.20.030(B)(4) the existing shed located on proposed Lot 4 must be removed or demolished prior to final approval of the short plat. In lieu of demolition, the owner must provide a bond or other financial guarantee acceptable to the Director in the amount of 150% of the cost of demolition and assurance that the shed will be demolished if a residence is not built on the lot within 12 months of final approval. The Building Department will require a permit for either the demolition or relocation of the shed if it is over 120 square feet in size. 5. Each lot within a new subdivision or short plat of five lots or greater will be landscaped with at least one tree in the front yard of each lot to create a more uniform streetscape. The following requirement will be a condition of final approval of the short plat: 6. All taxes and fees assessed against the property must be current prior to final approval of the Short Plat. Please check with the King County Assessor's Office and the City of Tukwila Finance Department prior to submitting final mylars to the Department of Community Development. Courtesy Comments - Public Works: The following items are required in connection with your permit application to install infrastructure, which you will obtain from the Public Works Department. Although these items are not required at this time, you may wish to begin preparing the necessary documentation in anticipation of your application submittal to Public Works. • • Mr. Don Leabo September 24, 2002 Page 3 Storm Drainage: 7. Provide a full drainage review Technical Information Report with the construction . permit application. The report must include all items listed in the King County Surface Water Design Manual, page 2 -8. 8. The required surface water management practice for new homes is infiltration, unless the soils will not infiltrate. The geotechnical report mentioned in Item 2 above will determine whether or not infiltration is appropriate for this site. Legal Documents 9. To comply with subdivision standards for public access roads, the City requires dedication of property five feet wide along South 150th Street. To complete the dedication you must adjust the property lines and provide the City with a Quit Claim Deed with legal description, attached drawing and a completed King County Excise Tax form. These will be recorded with the final short plat. 10. For each easement, provide an easement and drawing as separate documents for recording with the short plat. 11. Storm drainage maintenance agreement to be recorded separately from the short plat. 12. Access easement and maintenance agreement to be recorded separately from the short plat. Next Step: Upon receipt of all of the documentation requested in Items 1 and 2 above, we will continue processing your SEPA and Short Plat applications. If you have any questions regarding Public Works comments, please contact Jill Mosqueda, Associate Engineer at 206 - 433 -0179. If you have any questions regarding Planning comments, please contact me at 206 -431 -3663. Sincerely, Deborah Ritter Senior Planner Enclosure cc: Jill Mosqueda, Engineer Cyndy Knighton, Senior Engineer CITY OF TUKWILA PUBLIC WORKS PROJECT REVIEW COMMENTS Project Name: Leabo Short Plat File #: L02 -037 Review #: #1 Date: 09.23.02 Reviewer: L. Jill Mosqueda, P.E. The City Of Tukwila Public Works Department has the following comments regarding your application for the above permit revision. Please contact Jill Mosqueda at 206.433.0179, if you have any questions. SEPA This project will generate more than five additional peak hour trips, thereby triggering a traffic impact analysis. Please contact Cyndy Knighton at 206.433.0179, for the scope. Short Plat Geotechnical The Public Works Department is aware of conditions that exist on the properties to the north, northeast and east of this site. The hydrology and site conditions experienced during construction of the house directly north and abutting required significant excavation and complete redesign of the foundation. To protect you and to better assess the short plat design and subsequent construction, Public Works requires a full geotechnical report per the enclosed guidelines. In addition to the information spelled out in the guidelines, the report shall specifically address subsurface conditions for the Tots on the north of the short plat and shall also include recommendation for foundation design for new single family residences which would be built on these lots. This geotechnical report must also provide feasibility evaluation required by the King County Surface Water Design Manual, Chapter 5. Projects /short plat/L02 -037 Leabo #1 1 • • L02 -037 Leabo Short Plat For the Public Works permit application to install infrastructure Storm Drainage • Provide a full drainage review Technical Information Report with the construction permit application. The report must include all items listed in the KCSWDM page 2 -8. • The required surface water management practice for new homes is infiltration, unless the soils will not infiltrate. The geotechnical report mentioned above will determine whether or not infiltration is appropriate for this site. Legal Documents • To comply with subdivision standards for public access roads, the City requires dedication of property five feet wide along S 150th St. To complete the dedication, you must adjust the property lines and provide the City a Quit Deed with legal description, attached drawing, and a completed King County Excise Tax form. These will be recorded with the short plat. • For each easement, provide an easement and drawing as separate documents for recording with the short plat. • Storm drainage maintenance agreement to be recorded separately from the short plat. • Access easement and maintenance agreement to be recorded separately from the short plat. Projects /short plat/L02 -037 Leabo #1 2 • Ciy of Tukwila Steven M. Mullet, Mayor Department of Community Development NOTICE OF APPLICATION DATED SEPTEMBER 3, 2002 Steve Lancaster, Director The following applications have been submitted to the City of Tukwila Department of Community Development for review and decision. APPLICANT: LOCATION: FILE NUMBERS: PROPOSAL: OTHER REQUIRED PERMITS: Don Leabo, Greenridge Homes 4310 and 4320 South 150th Street, Tukwila E02 -018 (SEPA Determination) L02 -037 (Short Plat) Create a seven lot short plat Land Altering Permit, City of Tukwila Building Permits, City of Tukwila These files can be reviewed at the Department of Community Development, 6300 Southcenter Blvd., #100, Tukwila, WA. Please call (206) 431 -3670 to ensure that the file(s) will be available. OPPORTUNITY FOR PUBLIC COMMENT You can submit comments on this application. You must submit your comments in writing to the Department of Community Development by 5:00 p.m. on September 17, 2002. If you have questions about this proposal contact Deborah Ritter, the Planner in charge of this file at (206) 431 -3663. Anyone who submits written comments will become parties of record and will be notified of any decision on this project. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: 206 - 431 -3670 • Fax: 206 - 431 -3665 SHORT PLAT NUMBER L02 -037 Greenridge 7 -Lot Short Plot CITY OF TUKWILA WASHINGTON So. 146th St. I. o � $• la 6 0' • So. 148th St. ro..na 1. pip. /loci, in cos. - 10/2/00 ;a Fppund I/8• ha. in brass cuss - Casa - 4/16/02 3 0 LOT 3 LOT 2 r G - 90'42'55• R - 2520 L- 32.58' ISee99.02-* 12 67 • v 4549 �\ •413899•02•* - 99'17'05' R - 25.00' L - 38 96' LOT 1 DETAIL EASEMENT 1- tD. 65 16• 20:'' 1 • 128 52--- I • East 4.e Let 16' \Intersection set by projl :ti.9 I.n• e0.1.Ony non So. 1481n St. 0 1/2 the CeStCnce moc..rea 10 111* 'iertn 1/4 Corner. } 15.15' drainage • Mernent I LOT 4 ( .6 a E 0 .13..00 r.cr •/cop .16213 - 0.17' east f 0.63' sa.tn of 1010. 000(40 A88'0002'a Soutn 15Cth Street 8 7 55.18' fauna rea0 0 /cop 016213 - 0.59' swtn ` of Laic. p0S.l•a.. LOT 3 Area - 7,337 sa.ft A9899'02.0 7) • E5.18' 0 LOT 2 Arse - e;233 Sa'1 Propaua Lot Lines 65 t8• . See ca.32'E LOT 1 Area - 6.518 .:.N lipase 04310 30. S� 65 t e' 8 0 8 0 •413095.43•. (92.35' RECORDaNG N0 101-. /P AGE SCALE: 30 .ca - 30 s 00' 3n' 60 PGRTTCN CF S'Ai_1/4 of NE_i /4. s. 22_ T.23 N.. .R. 4_E.. W.M. 5 Loiter lot lint 107 d7 LOT 4 Area - 11.506 64lt 2000 nCI 20 00' 15- • 15' a'ana4e sasen' MI 09'02 -E 565L9'021 ii, 41 E. 0/000600 ti 1.01 LAOS 0811 ::^51: LOT 6 Ei Aree 6.934 60 it Al Area •/0 • eatOner.l A. • 6552 S:. ft 9 I 75.00' ' - cola 6. x000.03 (16) 0 4.0 . 10.006 .o.rt v, LOT 5 4''� d1 97 60' *AI 7500 \ T} , 0262 NSA' O $ 12.t 0 e' 0001' 10'.00 LOT 7 Area - 6.507 .a N 0002.60' SOt VKSS0 - 2 15 13 f0-na re0a - /cap *16213 - 318....3.1 0 0 95 south cf uic. pcs.l:r 408' A6e19.29.706 2'1 --- -- - -.1 c..coatea H n 5 to be 013: m.0 la the City cf T„L-!c -itn true re:aranq of lni. I WI: anal cal. 1.13.0 data far tna r vex -as aotoned Oy a +Oct Loa rnet0'0' 0 .ts. k. }t0 ar.a .0 ( rrOtonanee sere meas. /b ..U1 d W second trecAPit• a to oectrani rrea.✓t4 00Ke. e..(.p.N.ertIN by 0 0100 tops RECORDER'S CERTIFICATE f.ma for r0:oro tns 431 o'.........20 01 11 in Door of at pope at the rep.eSt 01 X -re4e. ✓ ■144/ -ertrr 7,Corse 0...... y•• uar. Supt. cf Records LAND SuR':EYOR'S CERTIFICATE Rsr.ore Serrco..r . a ' 911r.9 as a ions sur•yr by Its Stoll or aan.ratan. cert.fy that tni0 coat i4 0asea on an rictus e.t.a, of the .a.0 010010.0 nren. 10.0.0(04 by ire Or ..*der my r.pr..s.on; that the aistorc00. c.:.tl ee. aria 015140 are r+0en (mean c0rectlf. 014 (not a4n.mer.t. cthr (ran those man..mMts aowcwea for setting at a utter dote. now been set and :Ot 00001* •s1�e0 ne A.na as depicted to the 04.al- !I/"f7fl/{y/J�, Crti6col. N0. 4 s 3r sL/R►Er FOR: Don Leas* 6855 176th Aw. '4E. S.A. 235 Rear - ..ono. *a SCHROETERZLAND SURVEYING PROFES5101.r.L LAND SURVEYORS ►O sue 61* 1.40• eeirewe14 16.40 rail 0054091 tea te06160Y11019 Dr.. 8r b. DALE 7/26/02 WE I,ft° 4/16/02 Jeri w0. 399/4 P604C7 w0. 34,0' c••0 9, 6EHCfO 6/19102 X•1 I. biLT 3 07'..3... • State of Washington County of King City of Tukwila CITY OF TTJKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431 -3670 FAX (206) 431 -3665 E -mail: tuknlanlivci.tukwila.wa.us AFFIDAVIT OF INSTALLATION AND POSTING OF PUBLIC INFORMATION SIGN(S) I DO 1J Ve J (PRINT NAlME) understand that Section 18.104.110 of the Tukwila Municipal Code requires me to post the property no later than fourteen (14) days following the issuance of the Notice of Completeness. I certify that on - 3 - OZ the Public Notice Board(s) in accordance with Section U 18.104.110 and the other applicable guidelines were posted on the property located at 4glnt 1-13O 6. I5Dtn f so as to be clearly seen from each right -of -way primary vehicular access to the property for application file numbers LO . - (9 '51 ' -nd„ EOd - 01 v. I herewith authorize the City of Tukwila or its representative to remove . d immediately dispose of the sign at the property owner's expense, if not removed in a timely mann= ' within fourteen ( 4) days of a Notice letter. Applicant or Manager Sipature On this day personally appeared before me to me known to be the individual who executed the foregoing instrument and acknowledged that he /she signed the same as his/her voluntary act and deed for the uses and purposes mentioned therein. SUBSCRIBED AND SWORN to before me this day of ) c_r _) , o 1_ NOTARY PUBLIC in and for the State of Washington residing at (2. .E r en/ ) W G 5 My commission expires on M — August 29, 2002 • city of Tukwila • Steven M. Mullet, Mayor Department of Community Development Steve Lancaster, Director Mr. Don Leabo Greenridge Homes 6855 176th N.E. #235 Redmond, WA 98052 NOTICE OF COMPLETE APPLICATION Re: Leabo 7 -Lot Short Plat 4310 & 4320 South 150th Street Tax Parcel 004200 -0085 Tax Parcel 004200 -0086 L02 -037 (Short Plat) E02 -018 (SEPA) Dear Mr. Leabo: Your Short Plat and SEPA applications (under the above - referenced file numbers) have been found to be complete as of August 29, 2002 for the purposes of meeting state mandated time requirements. Essentially, this means that you have supplied the required items listed on the application checklists for these types of permits. The next step is for you to install the notice board on the site within 14 days of the date of this letter. You received information on how to install the sign with your application packet. We are enclosing a copy of the "Notice of Application" and a site map, both of which must be laminated and posted on that notice board. Per my conversation with you, you will arrange to post the Notice and site map on or before Tuesday, September 3, 2002. This is the same day that we will be mailing public notice to property owners, tenants and businesses within 500 feet of the project. After you have posted the laminated Notice and site map on the sign, you must return the signed and notarized "Affidavit of Installation and Posting" to me. We are about to commence our technical review process, which is the next phase in the processing of your Short Plat and SEPA applications. Although your applications have been found to be "complete ", the items you supplied may have to be revised or amended. The City may also require that you submit additional plans and information to ensure the project meets the substantive requirements of the City and to finalize the review process. If you have any questions, please feel free to call me at 206 -431 -3663. Sincerely, Deborah Ritter Senior Planner 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: 206 - 431 -3670 • Fax: 206 - 431 -3665 PERMIT CENTER SHORT PLAT NUMBER L02 -037 Greenridge 7 -Lot Short Plot CITY OF TUKWILA WASHINGTON 7 SO. 146th St. 0 H fwn0 1• pipe •/tocs in case - 10/2/00 I 0 m E Im .p P $ I b 2 So. 148th St. South 15Cth Street Foound 1/8- hole in brass a,s4 - case - 4/16/02 0 ( O v 40 49' ° hi88'09'02'8 .5 O - 89,705' - 3 I R . 25.00' I 1 LOT 1 . o m � iDETAIL L - 38 96' 0 m 2 LOT 6 EASEMENT t' 65 - r0' . - 1' -, 20.30' t 028.52' East 1n. lot 16 i I S I1 found recor /cop .16213 - 0.1r east & I 0.65 10.15 of cac. / pcs,t,on `Intersection set by projecting line s:.treny horn So. 14810 51. O 1/2 Inc distance rneas:.rea to the Merin 1/4 corner. 7) 7 85.18' Found .coot . /cap 016213 - 0.59' soath of cac position. LOT 3 Arco • 7.337 sr; ft A88V9'02.4 65.18' LOT 2 5 a •' 2_ Area - 8.233 14 ft /Propose, r, Lot tines 65.08' S88•00.32 -E LOT 1 A,.3 = 6.518 sa.tt Hou• 04300 300.5" S 65.08' r 0. 588 820.0C tr88W'43'e 192.65' RECORDING NO. 1,'0L . /PAGE SCALE: 33 s.c1 - 3p 00, 111111 0 1 . 1 50' Eo' 63 PCRTiCN OF SUV_1 /4 of NE_1 /4. 5.22_ T.23 N., R. ILE., W.M. 5 3rigoa lot Line 15' a 15' moinoge ecstrrent 09'02.E Ss� 20 C0' - S8819'02'E 0 0 f Y oP oP8€ ° 97.60' 10'67 LOT •4 Area• 01.506181 '/ 5866994 ( 30 3' 3 10 1St remOAa (16) 0 Arta - 10.0i:5 sift �;,, •' LOT 5 r _oft Proposed 1.01 Lne1 LOT 6 Alta - 1.934 sq.ft Area •/0 e0s.mtnl - 6552 s.. ft 75.00' 192.78 Is0a 8' A88'C9'02'00 cacW :ud 22 63 661. 12.7' 6' cn :in ins terse 1 LOT 7 Area e 6.507 so -ft - 5263' it 4 15 a /......ro-ho recta. •/can .16213 - 318' east& O 65' 1.04.10 ct coc. pcs.t.Ch 5' to be MO:c°teo to t5. City cf T,,..IC .Itn the re:oraoq ct tnia 503: short pot F.e•d onto tar the stows, .00 0000x..4 by pie30 field m*C1...rernt011 M9..,Or 4.3 Crtor 1*0ti0nytpe wort rheas-r•0 -itn O Sir •0000 (.009011. P:0 .0040!.'0 10'134100'4 01..c*. 4.44p..01 01.3 0, o stew to6• RECORDER'S CERTIFICATE filed for record this dor o'._......20 at 4 in book /t .of tat p090 00 the re0u510 of ��.04neII Ie> `ew�+a�Y eye• Uqr. Supt., of Records LAND SuRVEYOR'S CERTIFICATE Ricroro Scrroeter 0 req:stered as 0 Iona $ureyQe by Ire State of 'Newington. certify trot this plat i3 D0100 00 On Gatos. 1..r.ey 01 th• Iona descr.0.0 herein. conaucte4 Dy me 00 ureter ms L.per.isroni that the distances. Cabral* 050 angles ore 1.WO.n lherton correct/(, o14 that monuments ether than trios. mon msmts approves for setting of o later dote. nave been alt oho /0t 0010era_*la.00 ne Duna ds depicted on the plat" C�Q/j�9 fa Certificate No, Ar=a'ic SURVEY FOR: Don LeaOo 6855 176th A. 01 E. Suite 235 Rednmono. •a SCHROETEROLAND SURVEYING PROFESS1of.AL LAND SURVEYORS ►p b• 601 1ew.s .ser-p.P. *654 Qua e+2 -66es roe (16*46.4409 Dte.. 85 lo. DATE 7/26/02 DATE l,ELD 4/16/02 0+,00. 80 ftENSEO -6/19/02 50A:i 0• ,y,Y woe ..o. 399/6 PRt1.EC7 b. 02 &.EE7 A Portion of the Northeast Quarter. Section 22, Township 23 North, Range 4 East *001 ..1 TO W 001(2(0 TO 0•20* 0l PLAN S 1W •0. P4S1011 f1( 0(r••2 .00 KOOK • r CO OCIIO mm MSS Y' Ap1421.1 1/01 144 0001•0210 //M 04W0 SW1000 SOP COWS( 2 1/2' 1.: CG•010C110 61•02 01117.40 11014020 •1 C4W11 •000001 111[.110(.1 104 1 MOAK° 01/0.020 04 101 01010.6. PRIVATE ACCESS ROAD .lO1N1 ACCESS 11.2.5. 4.14.4441.1 IHIdC£N£D £D fsdirHAI T nrrAD LEGAL DESCRIPTION LOT 10. 01001 1. 11(0110 .001210. TO ADAUY 101E TRACTS. ALCOR:04G TO 111E PLAT 70)0000 KCMG) SN 19LORE 17 Or RLAIS. OVAL 110. RECORDS OF K040 COMM •A9OIGTOI.' 2101 EAST RALF Or LOT 17. &OCR T. 11C0IO A00TION TO *OARS' *10K TRACTS. ACCORDING TO 7NE PLAT.0CREO1 RECORDED at 00101E 17 OP FLAIL' PACE 10 w KIM COUNTY. 0A9110tON. 1 ORAPRIC 13CAL7 1 44 2444) C N 007010 000141 11011 111 IS - - -711 -1114 1Jp 1 ./ �- -2141• ' ;04.04 W3Y r -- - (01.0111.1 4.4 14,1011 w02'4 rl 0110' 32. PROPOSED YARD SETBACKS: ALL LOTS WILL HAVE A FRONT YARD SETBACK TO THE SOUTH. AS WHICH YALL HAVE A FRONT YARD SETBACK 10 THE 01 gy 44,4 to 0' •• • j1L0 2. ,4. I3 IR 7300 Sr 11 l Is 2i:o 1 T L 212\0 u 2 \ 0234 5T 7:2'0 1: o 0 ,0 4 115 751 21.0 . w 2»4�O1.D. 4 2200 te.N r, RECEIVED CITY OF TUKWILA AUG 2 6., 2002 PERMIT CENTER L )1101001 412 ;0 u./ MA SAT 2120. 100 X11 _ TI. 0C 1. 1 HS, 124 • I • A(• 20 -11 ig(ypa ' L 20 1 i • r "'1 1 r: 1tL. 8I I1p ft 01.04 655 501 1 NM•^ r, L 2H 1 lsNO . -1-00 1.- " - - - -I 00]0 1 iJa' - [ Ir•. y. •,.2 1 '* cia.----\ 1 • is :di tl - -114'- ..I' ,,. ••.:.1 1.3.41 IQ _ _ . 6520 SF 1 url /T1I.O- 4.1u4 4. 2212 121•.10 \1 .1• - 1.11 DOA./ I_ .0111 �1 T01141 \ - ' L• _ t. p: rre. -.:2212 I: K� l "sl:•0 40 1 - r•��1 "s yy 1 • *r Vt. /rte 1 • M. 4 04H1 -�,241 i v4*1*.. 41•]'13 •4N•4401.7L4 4..•1140 .. -.._ NOM_ . . 444•.. . o 007N'W'4 r.4.014 •4H'yg11•H04' 6 2032.5 Sr 1240 004120 2 -14'1 2/ no. 0111100 4 2240 4:.00 04.10 1: 2200 02.43) '11011 02{2 BENCHMARK E14.o1100 DaWm.pw S1•sr 1111 /70-0 00 40•111 140111 SI. - r01 M0101301 • 277.7 µ1 . 1' t. 1 0 0)04' ]m0 7 6505 Sr 11 RI ■ONITY YAP LOT 212010004 AREA: LOT 1: 10044 •011 •0 010400* •0 11«1 101 1 341 .0*1 010010.2 1100 Y Noun *000 101 1 010'.430 1011742 ROCO 1 .440,. MO OF 10, 4. 14 04■1 1041941 3101 01 000 • 1011 1321400.010 1100• 11• C•01a. 400 v 044..*. 100 v 00* • 1(.1031 1001711.1. RICO 01 004un 402 52 101 2 ...4)0 1001742.1: 2010 V 00.4 •00 M..n MVO •2*40.1: 4.011 TOTAL 00(40012. 10.370 Sr NOTES: I. 10110.4 6 / 421•114•4 • 1•400r 0•21407 •L02* 010 01 1141 1 *40. 11. ] 011 N. 1 • • 104.4.4 .6•4 •0111011011 *OWL .Tau 00.0 041 *.021 u 0160144 1034 400.40.010 110a.1•00 *00 54 030 1 OH P. A *.1.0.11..u.A4 Ma, MO Y0111/O1lt1*r 100 04 MvR O.4 10 * 4211. 1011 N • 4 10011 1 14/710 10 • 11 11711100 21106.1. 1212(14 1 1. .0001 ••01• 4.4 0011/ *!fl 0.••• 10•2 Al 7110 0A1004 1070 M 0,41(00.1.1 121)00 1211 (1.1 104..1/01'Mao / 1041*. • NOTE: THERE ARE NO SLOPES OVER 4' HIGH THAT ARE GREATER THAN 20; South 150th Street) Au 2201 4: 2151 (1]'.) 4: 1112 (*2 ..) 4: 2115 !!3.(444 A 2. 4.. 44. • 7211 .14 0-0 22412 04104 (1111 a. 1111 03'24.1 - _ 02.0.0)•• Vat" _ -CW M 12 --- -- �- _ _ _ loo' .- - * -_.. -__* .__.,._.4 C..w • ..y4.4i -_ Schroeter In Surveying PROFESSIONAL LAND SURVEYORS PD 0.. 12. St11.2-01. 1•211/400 SOM2 001 444.401 MI 12001437•01)S al ram gi T RECEIVED CITY OF TUKWILA AUG 2 6 2002 PERMIT CENTER A Portion of the Northeast Quarter, Section 22, Township 23 North, Range 4 East LEGEND n tP Cwr.M Vow.. w One I1w...l4 • IN. w/M w NA AOH. . • 9 *ANL pm • M Nw.. /1. 77770, • r.w .w w ,._ 7i 7-- e AAA aft x8 0006.4 IN. 7* 7.— ON ■ 1.70 A RR w. A •w• vw. • .ww+ • ww •s. wwww 7.0 wM Mw —7— —•— e• w. y M.v Mr ./1•„ 1 • GRAPHIC SCALE .BENCHMARK • Elwell7• Datum PM 0I•r W /20 -9 /OK SOLO Ile* SI. - 7Vn 919w7110n • 277.7 • Schroeter 615 Surveying PROFESSIONAL (AND SURVEYORS Po w 717E 74111.776, V•OM1111.N 1•770 70774 770 -9417 2AS 7011■/3-1071 M-- LEGAL DESCRIPTION LOI 10, BLOCK 1, SECOND ADDITION 10 ADAM'S HOLE TRACTS, ACCORDING 10 THE PLAT 9716(07 PECOROED 4, vOLULE 12 OF PLATS. PGA( 90. RECORDS CF KING COUNII, KA57*60 TON . THE EAST HAT F Of LOT 17, BLOCK 1, SECOND ADDITION 10 ADAMS' HOLE TRACTS. ACCOROI.G 10 THE PLAT IHERE07 RECORDED W vOLU11E 17 OF PLATS. PAGE 90. 77 K•79 COUNTY, WASHINGTON. SITE DATA AR(4: (.70 AC9(S - 60,077 Sr P90.0502 1.0 1.013 t PPOPS(D 9ErrSar 307 U1 /15 /ACRE 70N.NC PPOPOS(0 USE: 579O4E FAIN. r, OEIACH(D LAN. LOT WE 6503" Sr 44. Or 51!(: 12!56 5r A55E5506'5 200. 004200 -0095 004200 -0066 SETBACKS: 20' FROM (GARAGE) lo' rROYr ,..OUSE) (901H !ROM ACCESS 145(77(701 461-) RE4R S. SG1 ,I 73 v PROPOSED YARD SETBACKS: ALL LOTS WLL HAVE A FRONT YARD SETBACK 10 THE SOUTH, EXCEPT /5 V IICII KILL HAVE A FRONT YARD SETBACK 10 THE 6(51. 4 11552 Si en CU ti .F: i •i II South 150th Street .! NOTE: THERE ARE NO SLOPES OVER 1' HIGH THAT ARE GREATER THAN 207E Imo r•* 10(0,7.... Am I• — MIN PPt COMPLETE APPLICATION CHECKLIST The materials listed below must be submitted with your application unless specifically waived in writing by the Public Works Department and the Department of Community Development. Please contact the Department if you feel that certain items are not applicable to your project and should be waived, or should be submitted in a later timely manner for use at the Public Hearing (e.g., revised colored renderings). Application review will not begin until it is determined to be complete. ADDITIONAL MATERIALS MAY ' BE REQUIRED, TO ENSURE CONSISTENCY WITH CITY DEVELOPMENT STANDARDS. Department staff are available to answer questions about application materials at 206 -431 -3670 Department of Community Development and 206 - 433 -0179 Department of Public Works. COMPLETE APPLICATION CHECKLIST TABLE Information Required::. Alaybe.waived:in.iinustial :';: cases,, upon approval of both Public Works and . • Planning:.. Information Waived PbWk /Ping 'Office;Use'Only ,. . Co'mmnts & Conditions. . ' ' • .. ' '. APPLICATION FORMS: 1. Application Checklist: one (1) copy, indicating items submitted with application. 2. Four (4) copies of supporting studies with original signatures and license stamp as needed. 3. Complete Application Packet: Six (6) copies of application form and full sized plans, one set of all plans reduced to 8.5" by 11" (High Quality Photo.' Reduction) and other materials and information as specifically listed in Project Description and Analysis, Site Plans, Landscape Plan and Elevations. 4. SEPA Environmental Checklist (6 copies) and fee ($325). PUBLIC NOTICE MATERIALS: 5. King County Assessor's map(s) which shows the location of each property within 500 feet of the subject lot. SUBMIT ONLY IF UNDERLYING PERMIT REQUIRES PUBLIC NOTICE. 6. Two (2) sets of mailing labels for all property owners and tenants (residents and businesses) within 500 feet of the subject property. See Public Notice Materials. Note: Each unit in multiple - family buildings -e.g. apartments, condos, trailer parks must be included). SUBMIT ONLY IF UNDERLYING PERMIT REQUIRES PUBLIC NOTICE. A 4' x 4' Public Notice Board will be required on site within 14 days of the Department determining that a complete application has been received. PROPERTY INFORMATION 7. Vicinity Map with site location. 8. Surrounding Land Use Map for all existing land uses within a 1,000. foot radius from the lot's property lines. 9. Title Report -- Clearly establish status as legal lot(s) of record, ownership, all known easements and encumbrances. 10. Lot lines for 300 ft. from the site's property lines including right -of -ways. G1APPHAN \LANDUSE.APP \SEPAAPP.DOC, 06/16/00 1q� Y • City of Tula ESA Screening Checklist Date: City of Tukwila Endangered Species Act Screening Checklist Ot/u'/ RECEIVED CITY OF TUKWILA AUG 2 6 2002 PERMIT CENTER Applicant Name: 44‘) 4 Street Address: City, State, Zip: Telephone: /140"i 4—d) sz I0 2 , DIRECTIONS This Screening Checklist has been designed to evaluate the potential for your project to result in potential "take" of chinook salmon, coho salmon, or cutthroat trout as defined by Section 9 of the Endangered Species Act. The checklist includes a series of "Yes" or "No" questions about your project, organized into four parts. Starting with Part A on Page 1, read each question carefully, circle "Yes" or "No," and proceed to the next question as directed by the checklist. To answer these questions, you may need to refer to site plans, grading and drainage plans, critical areas studies, or other documents you have prepared for your project. The City will evaluate your responses to determine if "take" is indicated. January 25, 2001 1 1 • City of Tule'a ESA Screening Checklist Part A: Please review and answer each question carefully. Consider all phases of your project including, but not limited to, construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 1 -0 . Will the project require any form of grading? Grading is defined as any excavating, filling, clearing, or creation of impervious surface, or any combination thereof, which alters the existing ground surface of the earth (see Tukwila Municipal Code (TMC) Chapter 18.06, Zoning Code, Page 18 -11). Please circle appropriate response. NO - Continue to Question 2 -0 ® Continue to Question 1 -1 (Page 3) 2 -0 Will the project require any form of clearing? Clearing means the removal or causing to be removed, through either direct or indirect actions, any vegetation from a site (see Chapter 18.06, Page 18 -8). Please circle appropriate response. NO - Continue to Question 3 -0 YES - Continue to Question 2 -1 (Page 4) 3 -0 Will the project require work, during any time of the project, below the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers or in wetlands? Ordinary high water mark is the mark that is found by examining the bed and banks of a stream and ascertaining where the presence and action of waters are so common and usual as to distinctly mark the soil from that of the abutting upland, in respect to vegetation (see TMC Chapter 18.06, Page 18 -15). Please circle appropriate response. NO Continue to Question 4 -0 YES - Continue to Question 3 -1 (Page 5) 4-0 Will the project result in the processing or handling, storage, or treatment of hazardous substances? This does not include the proper use of fuel stored in a vehicle's fuel tank. Hazardous substances are any liquid, solid, gas, or sludge, including any material, substance, product, commodity, or waste, regardless of quantity, that exhibits the characteristics or criteria of hazardous waste as defined by Washington Administrative Code 173 -303 (see TMC Chapter 18.06, Tukwila Zoning Code, Page 18 -11). This includes fuel or other chemicals stored on -site dur. g construction. Please circle appropriate response. NO Continue to Question 5 -0 YES - Continue to Question 5 -0 5 -0 Will the project-result in the withdrawal, injection, or interception of groundwater? Examples of projects that may affect groundwater include, but are not limited to: construction of a new well, change in water withdrawals from an existing well, projects involving prolonged construction dewatering, projects installing French drains or interceptor trenches, and sewer lines. For the purpose of this analysis, projects that require a geotechnical report pursuant to the requirements of TMC 18.45.060 and 18.45.080E.4, or would require a geotechnical report if not exempt under TMC 18.45.080A, should answer Yes. Please circle appropriate response. NO Continue to Question 6 -0 - YES - Continue to Question 6 -0 January 25, 2001 7 s City of TLla ESA Screening Checklist Part A (continued) 6 -0 Will the project involve landscaping or re- occurring outdoor maintenance that includes the regular use of fertilizers, pesticides, or herbicides? This does not include the one -time use of transplant fertilizers. Landscaping means natural vegetation such as trees, shrubs, groundcover, and other landscape materials arranged in a manner to produce an aesthetic effect appropriate for the use of the land (see TMC Chapter 18.06, Tukwila Zoning Code, Page 18- 13).. For the purpose of this analysis, this includes the establishment of new lawn or grass. Please circle appropriate response. NO – Checklist Complete Checklist Complete Part B: Please answer each question below for projects that include grading. Review each question carefully, considering all phases of your project including, but not limited to construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question'as directed for each No or Yes answer. 1 -1 Will the project involve the modification of a watercourse bank or bank of the Green/Duwamish or Black Rivers between the ordinary high water mark and top of bank? This includes any projects that will require grading on any slope leading to a river or stream, but will not require work below the ordinary high water mark. Work below the ordinary high water mark is covered in Part C. Please circle appropriate response. Continue to Question 1 -2 YES - Continue to Question 1 -2 1 -2 Could the construction, operation, or maintenance of the project result in sediment transport off site or increased rates of erosion and/or sedimentation in watercourses, the Green/Duwamish rivers, or the Black River? Most projects that involve grading have the potential to result in increased erosion and/or sedimentation as a result of disturbances to the soil or earth. If your project involves grading and you have not prepared a Temporary Erosion and Sedimentation Control Plan specifically designed to retain 100 percent of the runoff (including during construction) from impervious surface or disturbed soils, answer Yes to this question. If your project is normally exempt under the Tukwila Municipal Code and would not require the preparation of a Temporary Erosion and Sedimentation Control Plan, BUT may still result in erosion or sediment transport off site or beyond the work area, answer Yes to this question. Please circle appropriate response. Continue to Question 1 -3 YES - Continue to Question 1 -3 1 -3 Will the project result in the construction of new impervious surfaces? Impervious surfaces include those hard surfaces which prevent or restrict the entry of water into the soil in the manner that such water entered the soils under natural conditions prior to development; or a hard surface area that causes water to run off the surface in greater quantity or at an increased rate of flow from the flow presented under natural conditions prior to development (see TMC Chapter 18.06, Tukwila Zoning Code, Page 18 -12). Such areas include, but are not limited to, rooftops, asphalt or concrete paving, compacted surfaces, or other surfaces that similarly affect the natural infiltration or runoff patterns existing prior to development. Please circle appropriate response. ,.....,) NO - Continue to Question 2 -0 (Page 2) CY—E-; Continue to Question 1 -4 January 25, 2001 3 • City of Tu•a ESA Screening Checklist Part B (continued) 1 -4 Will your project generate stormwater from the creation of impervious surfaces that will not be infiltrated on site? For the purpose of this analysis, infiltration includes the use of a stormwater treatment and management system intended to contain all stormwater on site by allowing it to seep into pervious surface or through other means to be introduced into the ground. If your project involves the construction of impervious surface and does not include the design of a stormwater management system specifically designed to infiltrate stormwater, answer Yes to this question. Please circle appropriate response. Continue to Question 2 -0 (Page 2) YES - Continue to Question 2 -0 (Page 2) Part C: Please review each question below for projects that include clearing. Review each question carefully, considering all phases of your project including, but not limited to construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 2 -1 Will the project involve clearing within 200 feet of the ordinary high water mark of a wat rcourse or the Green/Duwamish or Black Rivers? Please circle appropriate response. NO Continue to Question 3 -0 (Page 2) YES - Continue to Question 2 -2 2 -2 Will the project involve clearing of any trees within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? A tree is defined by TMC 18.06.845 as any self - supporting woody plant, characterized by one main trunk, with a potential diameter - breast - height of 2 inches or more and potential minimum height of 10 feet. Please circle appropriate response. 6 .470) Continue to Question 2 -3 YES - Continue to Question 2 -3 2 -3 Will the project involve clearing of any evergreen trees from within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis evergreen means any tree that does not regularly lose all its leaves or needles in the fall. Please circle appropriate response. NO Continue to Question 2 -4 YES - Continue to Question 2 -4 2 -4 Will the project involve clearing within 100 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please circle appropriate response. NO Continue to Question 3 -0 (Page 1) YES - Continue to Question 2 -5 2 -5 Will the project involve clearing within 40 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please circle appropriate. response. NO t Continue to Question 3 -0 (Page 2) YES - Continue to Question 3 -0 (Page 2) January 25, 2001 4 s City of Tuna ESA Screening Checklist Part D: Please review each question below for projects that include work below the ordinary high water mark of watercourses or the Duwamish/Green or Black Rivers or in wetlands. Review each question carefully, considering all phases of your project including, but not limited to, construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 3 -1 Will the project involve the direct alteration of the channel or bed of a watercourse, the Green/Duwamish rivers, or Black River? For the purpose of this analysis, channel means the area between the ordinary high water mark of both banks of a stream, and bed means the stream bottom substrates, typically within the normal wetted -width of a stream. This includes both temporary and permanent modifications. Please circle appropriate response. NO Continue to Question 3 -2 YES - Continue to Question 3 -2 3 -2 Will the project involve any physical alteration to a watercourse or wetland connected to the Green/Duwamish River? For the purpose of this analysis, "connected to the river means" flowing into via a surface connection or culvert, or having other physical characteristics that allow for access by salmonids. This includes impacts to areas such as sloughs, side channels, remnant oxbows, ditches formed from channelized portions of natural watercourses or any area that may provide off channel rearing habitat for juvenile fish from the Duwamish River. This includes both temporary construction alterations and permanent modifications. Watercourses or wetlands draining to the Green/Duwamish River that have a hanging culvert, culvert with a flap gate, diversion, or any entirely man -made or artificial structure that precludes fish access should answer Yes to this question. Please circle appropriate response. NO Continue to Question 3 -3 YES - Continue to Question 3 -3 3 -3 Will the project result in the construction of a new structure or hydraulic condition that could be a barrier to salmonid passage within the watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, a barrier means any artificial or human modified structure or hydraulic condition that inhibits the natural upstream or downstream movement of salmonids, including both juveniles and adults. Please circle appropriate response. NO Continue to Question 3 -4 YES - Continue to Question 3 -4 3 -4 Will the project involve a temporary or permanent change in the cross - sectional area of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, the cross - sectional area is defined as a profile taken from the ordinary high water mark on the right bank to the ordinary high water mark on the left bank. Please circle appropriate response. NO Continue to Question 3 -5 YES - Continue to Question 3 -5 3 -5 Will the project require the removal of debris from within the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, debris includes, but is not limited to fallen trees, logs, shrubs, rocks, piles, rip -rap, submerged metal, and broken concrete or other building materials. Projects that would require debris removal from a watercourse or the Green/Duwamish or Black Rivers as part of a maintenance activity should answer Yes to this question. Please circle appropriate response. NO Continue to Question 3 -6 YES - Continue to Question 3 -6 January 25, 200/ 5 City of Tula ESA Screening Checklist Part D (continued). 3 -6 Will the project result in impacts to watercourses or wetlands that have a surface connection to another watercourse or the Green/Duwamish or Black Rivers but do not contain habitat conditions that support salmonid use? Such areas may include, but not be limited to hillside seeps and wetlands isolated from the watercourse or river that have a surface water connection to the watercourse or river but are not assessable, nor would be assessable to salmonids under natural conditions. Wetlands with a "functions and values" rating for baseflow /groundwater support of 9 and above (or moderate) as described in Cooke (1996) should be included. Please circle appropriate response. Continue to Question 3 -7 YES - Continue to Question 3 -7 3 -7 Will the project include the construction of artificial waterways or wetlands connected to a watercourse containing salmonids? For the purpose of this analysis, the construction of artificial waterways or wetlands includes wetlands, channels, sloughs, or other habitat feature created to enhance wildlife use, particularly waterfowl use, or may be attractive to wildlife, particularly waterfowl. Please circle appropriate response. Continue to Question 3 -8 YES - Continue to Question 3 -8 3 -8 Will the project include bank stabilization? For the purpose of this analysis, bank stabilization includes, but is not limited to, rip -rap, rock, log, soil, or vegetated revetments, concrete structures, or similar structures. Please circle appropriate response. Continue to Question 4 -0 (Page 2) YES - Continue to Question 4 -0 (Page 2) January 25, 2001 6 • CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431 -3670 FAX (206) 431 -3665 E -mail: tukplan(2�ci.tukwila.wa.us • SEPA ENVIRONMENTAL REVIEW RECEIVED CITY OF TUKWIIA AUG 2 6 2002 APPLICATION FOR STAFF USE ONLY SIERRA TYPE P-SEPA Planner: - b — Rct. —ez, File Number: 0 a _ 0 ( Application Complete (Date:q _D9. Qt Project File Number: Igo Q _ 0(o 0 Application Incomplete (Date: ©_1 _ O d) Other File Numbers: L 0 Q , O 3 4_ NAME OF PROJECT/DEVE,L OPMENT: Lt-bo Short Plat LOCATION OF PROJECT/DEVELOPMENT: (Give street address or, if vacant, indicate lot(s), block and subdivision, access street, and nearest intersection. LIST ALL 10 DIGIT PARCEL NUMBERS. 310 t- LISA() 3: ISo +� , I(kklvl k.-, 9 `6 06g2,00 -00S5 4- Doha 00- O /, Quarter: NE. Section: ;0. Township: 3 Range: 4 k (This information may be found on your tax statement.) DEVELOPMENT COORDINATOR : The individual who: • has decision making authority on behalf of the applicant in meetings with City staff, • has full responsibility for identifying and satisfying all relevant and sometimes overlapping development standards, and • is the primary contact with the City, to whom all notices and reports will be sent. Name: Address: Phone: 0 (rid NG 2 - 6 a- FAX: c/%�— _c23 Zo 32- / �� Signature: Date: 16f � � - G:\APPHANILANDUSE.APPISEPAAPP. DOC. 06/16/00 August 7, 2002 • Cizy of Tukwila Steven M. Mullet, Mayor Department of Community Development OWNER: Mr. Terrance Hedin 4310 S. 150th Street Tukwila, Washington 98188 Re: Leabo 7 -Lot Short Plat 4310 & 4320 South 150th Street Tax Parcel 004200 -0085 Tax Parcel 004200 -0086 L02 -037 (Short Plat) E02 -018 (SEPA) Gentlemen: AGENT: Mr. Don Leabo Greenridge Homes 6855 176th N.E. #235 Redmond, WA 98052 Steve Lancaster, Director We have completed a detailed review of your SEPA and Short Plat applications. Certain additional information is needed from you to ensure that the project meets the substantive requirements of the City and to complete our review process. We have the following comments: General Comments: 1. You shall provide one set of all submitted plan sheets on the above - referenced files which have been reduced to 8.5" x 11" (High Quality Photo Reduction). 2. Four copies of all revised plan sheets and one copy of all revised reductions are to be provided to the undersigned at the time of each resubmission. 3. You shall provide a Title Report for Tax Parcel 004200 -0085 as well as Tax Parcel 004200 -0086. Each Title Report shall be dated within 30 days of the application filing (i.e., no later than July 5, 2002) and it shall clearly establish the following: the parcels' status as legal Tots of record; parcel ownership, and all known easements and encumbrances. To date, you have only provided a Subdivision Guarantee dated May 31, 2002 for Tax Parcel 004200 -0086. Short Plat Comments: Plat Map 4. Per TMC 17.04.060(B)(2), the Plat Map is to contain a certificate bearing the printed names of all persons having an interest in the subdivided land. Prior to recording, this certificate must be properly executed and notarized. 5. Per TMC 17.20.030(C)(5)(d), proposed private access roads must be paved and may not serve more than four lots nor be more than 200 feet in length. Those access roads 150 feet or greater shall have a turnaround built to Fire Department standards (see attached diagram H -14). The Fire 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: 206- 431 -3670 • Fax: 206 - 431 -3665 1 Mr. Terrance Hedin Mr. Don Leabo August 7, 2002 Page 2 Department standards include the requirement that the turnaround be a minimum of 65 feet deep (your proposed plan shows a tumaround that is only 50 feet deep). 6. You have proposed a 20 -foot wide easement for ingress, egress and utilities. Per TMC 18.06.505, the area of Lot 6 must be a minimum of 6,500 square feet exclusive of that portion of the access road which is located on that lot. The current size of Lot 6 (exclusive of the access road) is.only 5,957 square feet and therefore must be. increased by at least 543 square feet. When revising the locations of the proposed lot lines, please remember that the side setback for the east property lines on proposed Lots 1, 2 and Lot 3 as well as the side setback for the south property line of proposed Lot 5 is a minimum of 5 feet. Site Plan 7. Per TMC 17.12.020(A)(8)(d) the site plan shall show the setbacks of all existing structures on the site. Please indicate front, side and rear setback including dimensions. 8. Per TMC 17.12.020(A)(8)(n), on the site or development plan please show "the expected location of new buildings and driveways, including finished floor elevations of the buildings." Please clarify the location for access to proposed Lot 5. 9. The topography plan also indicates the presence of slopes that are 20% or greater at various locations on the site. Per TMC 17.12.020(A)(8)(j), please update the plan to clearly identify the location and extent of all slope areas that are 20% or greater. 10. Per TMC 17.14.020(A)(8)(k) please provide the location, size and species of any tree located within a sensitive area (slopes 20% or greater, wetlands or watercourses) or its buffer unless none of the trees are to be removed and their location is not likely to create an undue hardship on individual lots per TMC 18.54. Each existing significant tree to be removed shall be replaced with new tree(s), based on the size of the existing tree per TMC 18.54.130(3)(b). PLEASE NOTE: A tree clearing permit will be required prior to the issuance of any land altering permit and the clearing of any vegetation in sensitive areas. The tree permit will be subject to the conditions set forth in TMC Chapter 18.54. SEPA Comments: 11. You have not submitted an application form for SEPA Environmental Review. Please complete the attached form. 12. You have not submitted a completed City of Tukwila Endangered Species Act Screening Checklist. Although this checklist was part of your SEPA application packet, we are providing you an additional copy. • Mr. Terrance Hedin Mr. Don Leabo August 7, 2002 Page 3 Additional Information: As a courtesy, we are providing you with additional, preliminary information. Although it is not a definitive list, you may wish to review and consider this information. More specific review comments will be provided after your application is deemed to be complete and we have begun our technical review phase. 13. A 4 -foot x 4 -foot Public Notice Board will be required on site within 14 days of the Department determining that a complete application has been received. The content of the Notice Board must comply with the Public Information Sign standards (attached). 14. Please provide the fax number for the owner, Terrance Hedin. 15. Per TMC 17.20.030(B)(4) the existing shed located on proposed Lot 4 and the existing garage on proposed Lot 5 must both be removed or demolished prior to final approval of the short plat. In lieu of demolition, the owner must provide a bond or other financial guarantee acceptable to the Director in the amount of 150% of the cost of demolition and assurance that the accessory structure will be demolished if a residence is not built on the lot within 12 months of final approval. The Building Department will require a permit for either the demolition or relocation of this shed and garage if either structure is over 120 square feet in size. 16. The file number of the short plat (L02 -037) shall be shown on the face of the plat. 17. Per TMC 17.20.030(G)(1), each lot within a short plat of five Tots or greater will be landscaped with at least one tree in the front yard of each lot to create a more uniform streetscape. Upon receipt of the required items (1 through 12 listed above), the City will continue processing your SEPA and Short Plat applications. These applications will expire if we do not receive the requested items referenced above within 90 days of this letter's date (i.e., November 7, 2002), unless an extension is granted pursuant to Section 18.104.070(E) of the Tukwila Municipal Code. If you should have any questions regarding the within, please do not hesitate to contact me at 206 -431 -3663. Sincerely, Deborah Ritter Senior Planner City of tukwila • 6300 Southcenter BL, Suite 100 / Tukwila, WA 98188 / (206) 431 -3670 Parcel No.: 0042000085 Address: 4310 S 150 ST TUKW Suite No: Applicant: DON LEABO RECEIPT Permit Number: E02 -018 Status: PENDING Applied Date: 08/05/2002 Issue Date: Receipt No.: R020001110 Payment Amount: 325.00 Initials: NG Payment Date: 08/05/2002 10:59 AM User ID: 1671 Balance: $0.00 Payee: DON LEABO TRANSACTION LIST: Amount Type Method Description Payment Check 6989 325.00 ACCOUNT ITEM LIST: Description Account Code Current Pmts SEPA 000/345.831 325.00 Total: 325.00 Tg x°62-- doc: Receipt Printed: 08 -05 -2002 CITY OFfUKWILA Permit Center AUG 0 5 1001 H-1 _ 6300 Southcenter Boulevard, iTY la Suite 100, Tukwila, W��� Telephone: (206) 431 -3670 ENT •ECEIVED Certificate of Water Availability PROJECT #: (Required only if outside (To be completed by applicant) showing hydrant location City of Tukwila water utility and size of district) PART A: Site Address (Attac map and Legal Description maim: 310 o 604 4n. .>. t.'iSF�.�A.,�tr�a.:°3- `Name: a4?.4:� •� �+�ti r � i �" t�G"Y).�`. �::�.�.�� �r1�.� � LEA n r Ec bo Name: Address: P d • au . / 1t10(73 Address: Phone: 8o -- 154/a - St j Cv Phone: ,T.hI certificate is for the purposes of: Residential Building Permit ❑ Preliminary Plat ❑ Short Subdivision ❑ Commerciat/Industrial Building Permit ❑ Rezone ❑ Other Estimated number of service connections and meter size(s): Vehicular distance from nearest hydrant to the closest point of structure ft. Area is e - d by (Water tility districts Own /A• r t • • - (rI ' Date: 7_-, -v L PART B: (To be completed by water utility district) The proposed project is located within 1.1 q. t ►may (City/County) The improvements required to upgrade the water system to bring it into compliance with the utilities' comprehensive plan or to meet the minimum flow requirements of the project before connection: (Use separate sheet if more room is needed) Based upon the improvements listed above, water can be provided and will be available at the site with a flow of 23 O qpm at 20 psi residual for a duration of 2 hours at a velocity of 1 1 fps as documented by the attached calculations. I hereby certify that the above information is true and correct. U.)0•-ter t� Z �t.� -t - ' Agen hone 00(o -94 -15y"} Date PART C: (To be completed by governing jurisdiction) Water Availability: ❑ Acceptable service can be provided to this project ❑ Acceptable service cannot be provided to this project unless the improvements in item C2 are met. ❑ System isn't capable of providing service to this project. Minimum water system improvements: (At least equal to B2 above) (Use separate sheet if more room is needed) Agency /Phone By Date • ENVIRONMENTAL CHECKLIST Purpose of Checklist: RECEIVED AUG 0 5 2002 COMMUNITY DEVELOPMENT The State Environmental Policy Act (SEPA), chapter 43.21 C RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An environmental impact statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. Instructions for Applicants: This environmental checklist asks you to describe some basic information about your proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or " does not apply ". Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. Use of checklist for non - project proposals: Complete this checklist for non - project proposals, even though questions may be answered "does not apply". IN ADDITION, complete the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). For non - project actions, the references in the checklist to the words "project ", "applicant ", and "property or site" should be read as "proposal ", "proposer", and "affected geographic area" respectively. TO BE COMPLETED BY APPLICANT A. BACKGROUND 1. Name of proposed project, if applicable: Proposed Greenridge 7 lot short plat. 2. Name of Applicant: Don Leabo, Greenridge Development Address and phone number of applicant and contact person: Owner & Applicant: Don Leabo Greenridge Develoment 6855 176th Ave. NE, #235 Redmond, WA. 98052 (800) 892 -8462 Contact : James Jaeger, P.E. Jaeger Engineering 9419 S. 204 Place Kent, WA. 98031 (253) 850 -0934 3. Date checklist prepared: July 18, 2002 4. Agency requesting checklist: City of Tukwila Planning Dept. 1 Evaluation For Agency Use Only 5. Proposed timing or schedule (including phasing, if applicable): Begin construction in late 2002, or as soon as possible after receiving all required approvals. Project will continue with most work being performed during Spring of 2003. 6. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. There are no plans for future additions, expansion or further activity related to or connected with this proposal, except for the construction of the houses. 7. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A Geotechnical analysis of fill in the north area has been performed. Storm drainage analysis and report, and a level 1 downstream drainage analysis will be performed for the engineering submittal. 8. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. No current applications are pending. • • 9 List any government approvals or permits that will be needed for your proposal, if known. Applications and approvals will be required for the side sewer connections and water services from Water Dist. #125 and Val Vue Sewer Dist. The Fire Marshall will review and approve fire suppression systems for the necessary houses. The USPS will approve the mail box locations. 11. 10. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. The proposed project is a 7 lot residential short subdivision consisting of two existing larger lots, both with existing houses. The property has a total area of 1.38 acres. Access to the rear 4 lots will be from a central private access road with a "hammerhead" turn - around. The front 3 lots will be accessed from S. 150th St. S. 150th St. has been recently improved with curb, gutter and sidewalk. New driveways will be installed as necessary. All lots will be serviced with public water and sewer. 11. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. Location: The property is located on the north side of S. 150th St., east of 42nd Ave. S. The street address is 4310 and 4320 S. 150th St. It is located in Section 22, Township 23 N, Range 4 E., W.M. Legal Description: Lot 16, Block 1, Second addition to Adam's Home Tracts, According to the Plat thereof recorded in volume 12 of Plats, page 90, Records of King County Washington, And; The east half of Lot 17, Block 1, Second addition to Adam's Home Tracts, according to the Plat thereof recorded in volume 12 of Plats, Page 90, in King County, Washington. 12. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? No • • 3 B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (under line one): Flat, rolling, hilly, steep slopes mountainous, other. b. What is the steepest slope on the site (approximate percent slope)? The steepest slope on the site is approximately 20 %, within future Lot 3 near the northwest corner of the property. c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. The native soils are Alderwood sandy, gravelly loam (AgC). No agricultural or farmland. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. None. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Minor grading will be required for the construction of the private access road. It is estimated that the amount of grading will be approx. 500 CY for utilities and for road construction. It is anticipated that the cut and fill will be balanced within the site. The construction of the house foundations will also require excavation, but will be covered under the individual building permits. If structural fill is needed, it will be imported. The source is not known at this time. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Yes, during rainy construction periods erosion could occur on un- protected disturbed slopes. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? The impervious surfaces for the proposed project will include the new roads, houses, driveways, decks, walkways and other residential elements. The approx. percentage of area of impervious surface will be 50 %. 4 h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Proposed measures to reduce or control erosion, or other impacts to the earth include temporary and permanent erosion and sediment control measures as specified within the King County Surface Water Design Manual. Temporary erosion and sediment control measures include the installation of silt fence or hay bales, sedimentation trap, interceptor ditches, seeding or mulching exposed surfaces that are expected to remain as such for long periods of time, the application of water to exposed surfaces during dry seasons for dust control. Permanent erosion and sediment control measures include seeding exposed pervious areas for vegetation. 2. Air a. What types of emissions to the air would result from the proposal (i.e. dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Dust (suspended particulates) and construction exhaust emissions to the air will occur during the temporary construction period. Automobile emissions will result from the completed project; from the resident traffic and wood smoke from fireplaces. No quantities are known. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. None. c. Proposed measures to reduce or control emissions or other impacts to air, if any: Contractors will be required to implement standard practices for dust suppression such as the application of water to exposed surfaces, during construction. Standard exhaust filters will be on the construction equipment. 3. Water a. Surface: 1) Is there any surface water body on or in the immediate vicinity of the site (including year -round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. None. 5 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. No. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. None. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No surface water withdrawals or diversions are proposed. 5) Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan. The site is not located within a 100 -year flood plain. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. The proposal does not involve any discharges of waste materials to surface waters. b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. No groundwater will be withdrawn and no water will be discharged to groundwater as part of this project. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, If any (for example: Domestic sewage; industrial, chemicals, agricultural: etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. No septic systems. Val Vue Sewer District provides complete sewer service. c. Water Run -off (including storm water): 1) Describe the source of run -off (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? if so, describe. 6 Storm water run -off from all impervious surfaces will be collected in road gutters, catch basins, roof drains, etc. and directed into a piping system. The pipes will direct the water to detention pipe/ wetpond and will be discharged to the existing drainage system within the north side of S. 150th St. 2) Could waste materials enter ground or surface waters? If so, generally describe. Waste materials, such as road oils /contaminants, could enter the surface water if they are introduced into the system and are not removed by water quality facilities. d. Proposed measures to reduce or control surface, ground, and run -off water impacts, if any: Best Management Practices proposed for erosion /sedimentation control during construction. Facilities for drainage control including detention ponds will be used. Facilities for water quality enhancement such as wetponds, catch basin sumps, and oil /water separators will be used. 4. Plants a. Check or circle types of vegetation found on site: deciduous tree: alder, maple, aspen, fruit evergreen tree: fir, cedar, pine, other - ornamental shrubs grass pasture crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other water plants: water lily, eelgrass, milfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? The site is covered with lawn, few trees and typical residential landscaping shrubs. Clearing will be minimal because most of the site is already cut lawn. c. List threatened or endangered species known to be on or near the site None are known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Much of the completed landscaping will be new residential type landscaping consisting of lawn, shrubs and ornamental trees. • • 5. Animals 7 a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site: X Birds: hawk, heron, eagle, songbirds, other: crows, robins X Mammals: deer, bear, elk, beaver, other: squirrel, rodents, rabbits Fish: bass, salmon, trout, herring, shellfish, other: Eastern gray squirrel and songbirds are typical of western Washington forests and residential neighborhoods. b. List any threatened or endangered species known to be on or near the site. No threatened or endangered species are known to be on or near the site. c. Is the site part of a migration route? If so, explain. The Puget Sound area is part of the Pacific Flyway. Birds that inhabit the area vary seasonally due to migrations. However, the area is not part of a larger, permanently preserved migratory bird habitat. d. Proposed measures to preserve or enhance wildlife, if any: None. 6. Energy and Natural Resources What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. The energy needs for the project site will be met through services offered by Puget Sound Energy. Puget Sound Energy will be servicing the project site with natural gas and electricity. These services will be used for heating, appliances and general household uses. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: The contractors will comply with applicable City of Tukwila and other local energy conservation requirements, such as the UBC. 7. Environmental Health 8 a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. There are no known environmental heath hazards that would be of potential concern during construction of the proposed project. 1) Describe special emergency services that might be required. It is not anticipated that there will be any additional demand for special emergency services to serve the site as a result of the proposed project. Typical emergency services such as fire, police, medical may be required as is typical for any residential development. 2) Proposed measures to reduce or control environmental health hazards, if any: Since there are no known environmental health hazards associated with the project, no measures are proposed. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? Seatac airport is within the general vicinity. 2) What types and levels of noise would be created by or associated with the project on a short-term or a Tong -term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. The operation of construction vehicles on -site during clearing, grading, sitework and the construction of the proposed houses will cause a short-term increase in daytime noise levels in the project vicinity. Construction would take place during normal hours for construction as permitted by the City. 3) Proposed measures to reduce or control noise impacts, it any: Contractors will be required to confine on -site construction activities to daytime hours, in accordance with County ordinances. Equipment will be equipped with mufflers. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The existing site is two large residential lots. There are two existing houses, with garage, landscaping, etc. The adjacent uses are typically moderately sized residential lots, City street. b. Has the site been used for agriculture? If so, describe. No. c. Describe any structures on the site. Two existing houses, shed and garage. d. Will any structures be demolished? If so, what? The garage and shed on the east property will be removed. e. What is the current zoning classification of the site? Residential , R 6500 f. What is the current comprehensive plan designation of the site? Single family residential. g. If applicable, what is the current shoreline master program designation of the site? The site is not within a Shoreline Environment. Has any part of the site been classed as an "environmentally sensitive" area? If so, specify. No i. Approximately how many people would reside or work in the completed project? Based on an estimated average of 3.5 people per house, there will be approx. 25 people residing in the completed development. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any: None. I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The proposal is consistent with site zoning and Comprehensive Land Use Plan Designations for the property. Building setbacks will be in accordance with the City of Tukwila requirements. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle or low- income housing. • • 10 5 new housing units will be provided. it is anticipated that these units will be in the middle- income price range. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle or low- income housing. None. c. Proposed measures to reduce or control housing impacts, if any: Not applicable. 10. Aesthetics What is the tallest height of any proposed structure(s), not including antennas: what is the principal exterior building material(s) proposed? The tallest height of the typical proposed house structure is estimated to be 30 feet. The principal exterior building materials for the houses will be wood siding and comp shingle roofs. b. What views in the immediate vicinity would be altered or obstructed? No views in the immediate vicinity would be altered or obstructed. c. Proposed measures to reduce or control aesthetic impacts, if any: No such measures will be needed since no such impacts are expected. 11. light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? There is no proposed street lighting for the private road. Street lighting along S. 150th St. is existing. It is likely the Tight and glare will slightly increase during the night as the result of the proposed project. b. Could light or glare from the finished project be a safety hazard or interfere with views? None that we are aware of. c. What existing off -site sources of light or glare may affect your proposal? Existing off -site sources of Tight and glare in the project vicinity would be from streetlights and motor vehicles operating on adjacent roadways. These sources or light and glare are not considered to significantly affect the proposed project. • • 11 d. Proposed measures to reduce or control light or glare impacts, if any: None. 12. Recreation a. What designated and informal recreational opportunities are in the immediate vicinity? Designated recreational opportunities closest to the site include the nearby elementary school, located east and across S. 150th St. from the property. b. Would the proposed project displace any existing recreational uses? If so, describe. No c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: None proposed. 13. Historic and Cultural Preservation a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. There are no known places or objects listed for, national, state or local preservation registers within or near the project. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. There are no known landmarks or evidence of historic; archaeological; scientific; or cultural importance located on or near the site. c. Proposed measures to reduce or control impacts, if any: None proposed. Transportation a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The proposed plat plan shows access from S. 150th St. A central on -site private road is proposed to service all of the lots. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? The site and its immediate surroundings are not served by public transit. The nearest public transit site is approx. 1/2 mile to the west. • • 12 c. How many parking spaces would the completed project have? How many would the project eliminate? The completed project will provide 28 parking spaces based on four parking spaces per lot. Depending on the length of the driveways, there may be more. There is existing parking for the two lots. d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). The site will require construction of the interior private access road as shown on the proposed plat plan. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. It is generally considered that one residential lot will generate 10 vehicle trips per day. With this ratio, the estimated new vehicular trips will be 70 per day. There will be approx. 1 peak AM and PM trip per day per lot. g. None. Proposed measures to reduce or control transportation impacts, if any: 15. Public Services a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. The project will result in a potential increased need for fire protection, medical and police protection services. It will also increase the demand on the school system. The need for these services are typical for a residential development. b. Proposed measures to reduce or control direct impacts on public services, if any. The required impact fees will be paid. The finished lots will be added to the tax base to provide tax support for the public services. 16. Utilities a. Circle utilities currently available at the site: electricity, natural aas, water, refuse service, telephone, sanitary sewer, septic system, other. • • 13 b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. Proposed utilities for the project include the extension of water, sewer, electricity, gas and telephone within the plat. These services are generally located within the future public right -of -way. The services will be provided by: Sewer : Val Vue Sewer District Water: Water District # 125 Telephone: Qwest Electricity & Gas: Puget Sound Energy C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead age cy is relying on t _ m to : e its decision. Signature: Date Submitted: `-r/ z'Ljo2 JA.GER ENGINEERIIG 9419 S. 204 PLACE - KENT, WASHINGTUN 98031 PHONE (253) 850 -0934 FAx (253) 850-0155 July 15, 2002 PRELIMINARY DRAINAGE REPORT GREENRIDGE 7 LOT SHORT PLAT 4320 S. 150th ST. TUKWILA, WA. PARCEL NOS. 004200 -0085 004200 -0086 PREPARED FOR: Applicant: Don Leabo 6855 176th Ave. NE, #235 Redmond, WA. 98052 (800) 892 -8462 PREPARED BY: James J. Jaeger, P.E. RECEIVED AUG 0 5 2002 COMMUNITY DEVELOPMENT • I. OVERVIEW The proposed short plat will create 7 single family residential lots from two existing larger parcels with a total area of 1.38 acres. There are existing houses on each of the existing parcels. These houses will remain of future Tots #.1 and #5. Three of the lots will have access directly from S. 150th St, The remaining 4 Tots will gain access from a new private road within a private access and utility easement. The private road will be Tess than 150 ft. and will provide a "hammerhead" turnaround. The frontage road, 150th Ave. SE., has recently been improved by the City with curb, gutter and sidewalks. No additional frontage improvements are proposed, however, an additional 5' will be dedicated for increased right -of -way. The site slopes down from the north to the south, towards S. 150th St. The average slope is 5 %. There is a small higher knob near the existing eastern house. The southwest corner is the low point of the property. The site is generally covered with lawn and grass, with sporadic trees and residential shrubs. There does not appear to be any wetland or potential wetland areas on the site. There are no steep slope areas on the site. The existing western house has an ornamental pond in the front yard. This pond has an overflow pipe connected to the existing catch basin in the street. The existing house on future lot #1 will not be altered. The driveway will remain as it exists. As such, lot #1 was not included in the drainage calculations or will not be part of the new private drainage system. The soils on the site appear to be an Alderwood series silt. The potential for infiltration is low due to potential high groundwater and slow infiltration rate. Approximately 150' west of the site is a stream that is tributary to Gilliam Creek. This stream flows from the north to the south and is piped under S. 150th St. at the dip in the road. There are existing catch basins that direct the street runoff into the creek. The proposed drainage system will be designed using the 1998 King County Drainage Manual. A private detention system and wetvault will provide the required water quantity and water quality control. It us proposed to use a large diameter underground pipe as means for detention and wetvault storage. g _22110 m CARGO ti 26114 N -- N RNAT ONAL• 1 I�>� JOIHAYSQ mm 1..5. AV S AV S yy• 33RD 3411 35T11 35tH AY 3SIN AY S 5 +t 42111 IN S 1.1 41N0 44111 44111 8 47111 { w 1111 2131NDH1(lOS . . i ANOOV[R PI( — Y m -o eBOV[A PN C.nppInl. YO AN ' / /fJ ft/ 1:.%; .. X1(,.1 V;°1r:11!)(61'. .:.4 C) c3 \�Ir 1 �1�a 6 69111 AV 5 '1 '1 L • JJ,q • 1. �.0 Y � II.Y 'S11L Tul wp�iluf 1 ROB( F (, '7)44 . ICR{M eIRIwIM 4 I.SII.C. II. PRELIMINARY CONDITIONS Since this project is a residential development with over 10000 square ft. of new impervious surface, it will be subject to a full drainage review. It will also be subject to the drainage detention and water quality requirements. CORE DRAINAGE REQUIREMENTS 1. Discharge at Natural Location: The site will continue to discharge at the natural location. This location is at the southwest corner of the site where the new site drainage system will discharge into the existing drainage system within S. 150th St. 2. Off -Site Analysis: A downstream drainage analysis has been performed and is detailed in section III of this report. 3. Runoff Control: This project will provide the level 1 runoff control as specified in the 1998 King County Surface Water Manual. The KCRTS method of analysis will be used. The detention pipe will provide the storage. 4. Conveyance System: The onsite conveyance system will be calculated to handle the 100 year peak rate developed storm event. 5. Erosion and Sedimentation Control Plan: An erosion control plan will be prepared and submitted as part of the engineering plan set. 6. Maintenance and Operation: Operation and maintenance will be performed by the homeowners. A section in the report outlining maintenance procedures will be provided. 7. Bonds and Liability: The required construction and maintenance bonds will be determined by the City and executed for this project. 8. Water Quality: Water quality will be provided by storage volume in the bottom half of the oversized, underground detention pipe. It will be sized as a basic wetpond. III. OFFSITE ANALYSIS REVIEW OF RESOURCES The following resources were used in the preparation of this section: 1. King County Wetland Inventory Reports: There are no wetlands shown in this report. 2. King County Surface Water Management Reconnaissance Report shows the beginning of an un -named stream approx. 150' west of the site. 3. Generalized topog. map from the City of Tukwila. 4. King County Sensitive Area Map Folio - Dec., 1990 • Wetlands: none shown • Streams and 100 year floodplain: none shown • Erosion Hazard: none on site. • Landslide Hazard: none on site. • Seismic Hazard: none on site. • Coal Mine Hazard: none on site. 5. USGS topography map 6. USDA Soil Conservation Service soils survey. FIELD INSPECTION A visual reconnaissance of the site and the offsite drainage system was performed on July 9, 2002. The weather was dry. UPSTREAM OFFSITE DRAINAGE CONTRIBUTION The topography slopes away from the site along the south, west and east property lines. Along the north property line, the residential lots to the north have a gentle slope onto the site. These lots are medium density residential Tots that front along S. 148th St. to the north. The runoff from these lots will be the storm runoff from the grassy rear yard areas. This runoff will be minimal due to the small area and the lawn covering. Much of the runoff will be absorbed by the lawn. If there is a future problem, a yard drain can be installed in the north lot area and connected to the drainage piping that each lot will have for its roof downspout connections. • • DOWNSTREAM DRAINAGE ANALYSIS The site has some minor drainage improvements that include the front yard ornamental pond on the existing western lot (house #4310). This pond has an overflow catch basin with a piped connection to the street catch basin. S. 150th St. has a drainage system that includes type 1 catch basins with 12" piping. The pipes flow to the west within the north side of the street. The vertical curb collects the street runoff. 1. Drainage leaves the site at the southwest corner and enters the existing drainage system within the north side of S. 150th St. This is a 12" pipe that runs between type 1 catch basins. The pipe runs for 120 ft. and discharges into the stream that crosses under S. 150th St. 2. The stream is an un -named tributary to Gilliam Creek. It flows from the north to the south and crosses under S. 150th St. within a 36" concrete culvert. This is an 80' long culvert with a slope of 0.9 %. It is approx. 10 below the elevation of the road. 3. The stream continues within a well defined channel for approx. 800' to the south where it then combines with Gilliam Creek just north of S. 154th St. Gilliam Creek then continues flowing to the east along the SR 518 corridor. SUMMARY The downstream drainage from this site will be discharged almost directly into the stream that is 150' west of the site. This stream is within a well defined channel for its short distance to Gilliam Creek. Gilliam Creek is a major drainage component that has had erosion problems east of the area along the SR 518 corridor. The increase in the 100 year peak flow due to this development is 0.097, less than 0.1 CFS. This will have a negligible effect on the downstream system. The level 1 detention that is provided will provide mitigation up to the 10 year storm event. • • • •6: rl , . Ya.. t. • ••, .••r•,_. 10 • • • • • ., • • •• • • . ,,` • -:l • 1 • • • IV. DETENTION ANALYSIS AND DESIGN A. PREDEVELOPED DRAINAGE The drainage from the existing site flows towards the southwest and onto the existing street gutter. The drainage area used in the calculations will not include the entire site. The existing house on new lot #1 will not be ' included in the calculations because it will not be altered and it currently has a drainage system that connects directly to the street. The existing drainage analysis was performed using the "KCRTS" hydrology software that was produced by the County. Summary computer printouts are attached for reference. The methods outlined in the 1998 King County Drainage Manual were used as guidelines. Following this page are the data sheets used for the computer input data. The computer summary sheets for peak flow. Below is a brief description of the existing drainage characteristics: 2 year peak flow: 10 year peak flow: 100 year peak flow: total area: developed area: pervious area: land use type: 0.068 CFS 0.124 CFS 0.276 CFS 1.38 acres 1.22 acres 1.45 acres till grass impervious area: 0.07 acres (exist house, shed and driveway on future lot #5) • b SF SHORT R._ Pr ORPs_ _ PR-- NL 0 eaD.....CaTQ0.1.7t1Io..KL - NAaff, Use 5t€ ax-ec)__ Lesy Loi-*? (to 6_0 0 1 1 sF - 106(6_4- sp s-3327 ..sp (122_ Rau t■ b Ci F- 1 MY•4Th \LIO_t.) ht0 se- -Lot-_,ST 1 t ) sP 7-9rD,A,N --L-04-6-' 6-2-1 sP- e _ Lot-- 4... 12-2. SP e->cl tr■ c yew s- 1 4-7 6_0)41 1 4-7 (.? SF- S 1 s3 s-c= = 0(07 _he- 2 - Fe_y-Nsious 1 — 0 . D-7 c 116 ft c. • SO k GROuf /10 cko--+--IAJcp:0 ca-tr- e_ 5- \\ \ "r1 1 tr7 PE-fsck<- -F-n3-(n Kc,R75. 1 . Zr C.Q_z. 0 Col. c-F-3- 2 - (01r av_L-7_ , ( cl1/4-. C.-FS 3. , 21(� c-F-3- Ico\fr. GREENRIDGE 7 LOT SHORT PLAT - S. 150TH ST. PEAK FLOW CALCULATIONS USING KCRTS PREDEVELOPED CONDITIONS: Pervious till grass: Impervious: Total area: Flow Frequency Analysis Time Series File:grnpre.tsf Project Location:Sea -Tac 1.15 acres 0.07 acres 1.22 acres - -- Annual Peak Flow Rates-- - Flow Rate Rank Time of Peak (CFS) 0.120 0.067 0.150 0.039 0.068 0.124 0.112 0.276 Computed Peaks 4 2/09/01 2:00 7 1/05/02 16:00 2 2/27/03 7:00 8 8/26/04 2:00 6 1/05/05 8:00 3 1/18/06 16:00 5 11/24/06 3:00 1 1/09/08 6:00 DEVELOPED CONDITIONS: Flow Frequency Analysis - - Peaks - - Rank Return Prob (CFS) 0.276 0.150 0.124 0.120 0.112 0.068 0.067 0.039 0.234 Pervious till grass 0.78 acres Impervious: 0.44 acres Total area: 1.22 acres Flow Frequency Analysis Time Series File:grndev.tsf Project Location:Sea -Tac - -- Annual Peak Flow Rates-- - Flow Rate Rank Time of Peak (CFS) 0.176 0.130 0.215 0.124 0.153 0.185 0.180 0.373 Computed Peaks 5 2/09/01 2:00 7 1/05/02 16:00 2 2/27/03 7:00 8 8/26/04 2:00 6 10/28/04 16:00 3 1/18/06 16:00 4 10/26/06 0:00 1 1/09/08 6:00 Period 1 100.00 0.990 2 25.00 0.960 3 10.00 0.900 4 5.00 0.800 5 3.00 0.667 6 2.00 0.500 7 1.30 0.231 8 1.10 0.091 50.00 0.980 Flow Frequency Analysis - - Peaks - - Rank Return Prob (CFS) Period 0.373 0.215 0.185 0.180 0.176 0.153 0.130 0.124 0.320 1 100.00 0.990 2 25.00 0.960 3 10.00 0.900 4 5.00 0.800 5 3.00 0.667 6 2.00 0.500 7 1.30 0.231 8 1.10 0.091 50.00 0.980 • • B. DEVELOPED DRAINAGE The developed project will include a drainage detention structure in the form of a subsurface oversized pipe. The developed site will include the roof downspout drains, the driveways and the new private access road. The detention pipe will be oversized to provide wetpond volume in the bottom half of the 6' diameter pipe. The detention system was based on a level 1 performance standard. The water quality is from the basic menu. Similar to the existing condition, the KCRTS method was used to determine the peak flows for the various storm events. The computer data sheets for the developed flows are shown on the summary page for the detention system summary. The flows are designated as inflow on the time series results table. A brief summary of the developed drainage characteristics are: 2 year peak flow: 10 year peak flow: 100 year peak flow: 0.153 CFS 0.185 CFS 0.373 CFS developed area: 1.22 acres pervious area: 0.78 acres land use type: till grass impervious area: 0.44 acres land use type: impervious • SHORT a_ _DRA-kriN-SF-- CAttL.43-, Ps-Re413- Us-e. 12- _ e.10 Cemak-fic"-rj Cowp I T1 DK.1 ciJ 1-4 b 5-1Q, pQ-r-NIOUS CA- t-Zt 1•1 c.)1\cLAI\ not 1,t\Ctufkz,r4 (k__,5 2-0 (k =400 sP 2-�c YE' jo -7- --(06O 2.1,260 L4-* 4- hous3-'. 551)(tipbt = -2-1(AD 'k (aoo s-F 7.5p.x) sF _ _ ' "12%)< 1-z+- *G2 ; koJse:. 3S 1)‹ toe z 4,Dc); sc-= c900 SF L-t hou- SF: 41-c0 S-P 2ADO E_GL-eANnint : o(,tz ta(i3 444a 5F _ Thkck-1 T-v) 193753 = 0 .14- Pc C. Sot C.41-41 Ov.\ E. E FLc 5 Fro ArN 2 • GZ-2_ c-F3 2, )0 \fr. 0. (SS- !flO\r _t_oo 0 ,373 c-F3 • • DETENTION STORAGE SUMMARY FROM KCRTS Retention /Detention Facility Type of Facility: Detention Tank Tank Diameter: 4.00 ft Tank Length: 176. ft Effective Storage Depth: 4.00 ft Stage 0 Elevation: 220.00 ft Storage Volume: 2218. cu. ft Riser Head: 4.00 ft Riser Diameter: 12.00 inches Number of orifices: 2 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 1.29 0.090 2 3.00 1.12 0.034 4.0 Top Notch Weir: None Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation (ft) (ft) (cu. ft) (ac -ft) (cfs) (cfs) 0.00 220.00 0. 0.000 0.000 0.00 0.01 220.01 1. 0.000 0.005 0.00 0.03 220.03 2. 0.000 0.007 0.00 0.04 220.04 4. 0.000 0.009 0.00 0.05 220.05 5. 0.000 0.010 0.00 0.07 220.07 9. 0.000 0.012 0.00 0.08 220.08 11. 0.000 0.013 0.00 0.09 220.09 13. 0.000 0.014 0.00 0.11 220.11 17. 0.000 0.015 0.00 0.12 220.12 19. 0.000 0.016 0.00 0.22 220.22 48. 0.001 0.021 0.00 0.32 220.32 83. 0.002 0.025 0.00 0.42 220.42 124. 0.003 0.029 0.00 0.52 220.52 169. 0.004 0.032 0.00 0.62 220.62 219. 0.005 0.035 0.00 0.72 220.72 271. 0.006 0.038 0.00 0.82 220.82 327. 0.008 0.041 0.00 0.92 220.92 385. 0.009 0.043 0.00 1.02 221.02 446. 0.010 0.045 0.00 1.12 221.12 508. 0.012 0.048 0.00 1.22 221.22 573. 0.013 0.050 0.00 1.32 221.32 638. 0.015 0.052 0.00 1.42 221.42 705. 0.016 0.054 0.00 1.52 221.52 773. 0.018 0.055 0.00 1.62 221.62 842. 0.019 0.057 0.00 1.72 221.72 912. 0.021 0.059 0.00 1.82 221.82 982. 0.023 0.061 0.00 1.92 221.92 1052. 0.024 0.062 0.00 2.02 222.02 1123. 0.026 0.064 0.00 2.12 222.12 1194. 0.027 0.066 0.00 2.22 222.22 1264. 0.029 0.067 0.00 2.32 222.32 1334. 0.031 0.069 0.00 2.42 222.42 1403. 0.032 0.070 0.00 2.52 222.52 1472. 0.034 0.071 0.00 110'0 '£66 LTO'0 '£6L LOO '6STT S60'0 '1861 1;0'0 '61ZZ 190'0 'LTZZ TSO'0 '81ZZ 1;0'0 '8IZZ (43 -0K) ( ;3 -n0) abezo4S OT'TZZ 0T'T SO'0 L6'IZZ L6'I SO'0 LO'ZZZ LO'Z L0'0 S£'£ZZ ;£'£ OI'0 L6'£ZZ L6'£ 31'0 66'£ZZ 66'£ ZT'0 TO'6ZZ TO'6 91'0 80'6ZZ 80'6 L£'0 naT3 ebe4S DTe3 Need * * * * * ** ZI'0 * * * * * ** £I'0 LO'0 TI'0 * * * * * ** ZZ'0 * * * * * ** 81'0 ZI'0 61'0 * * * * * ** LI'0 8 L 9 £ * * * * * ** L£'0 T gabzey MoTflnO MoTguI PAH 00'0 OZS'S ISO'0 '8TZZ 00'9ZZ 00'9 00'0 08£'S 1 ;0'0 '8TZZ 06'SZZ 06'S 00'0 06Z'S ISO'0 '8tZZ 08'SZZ 08'S 00'0 060'S 1;0'0 '81ZZ OL'SZZ OL'S 00'0 056'6 TSO'0 '8IZZ 09'SZZ 09'S 00'0 06L'6 1 ;0'0 '8TZZ OS'SZZ OS'S 00'0 0£9'6 TSO'0 '8IZZ 06'SZZ 06'S 00'0 OL6'6 TS0'0 '8TZZ 0£'SZZ O£'S 00'0 00£'6 TSO'0 '8TZZ OZ'SZZ OZ'S 00'0 OZI'6 1 ;0'0 '8TZZ OI'SZZ OI'S 00'0 0£6'£ 190'0 '8TZZ 00'SZZ 00'S 00'0 0£L'£ ISO'0 '8IZZ 06'6ZZ 06'6 00'0 0£9'£ TSO'0 '8IZZ 08'6ZZ 08'6 00'0 0T£'£ IS0'0 '8IZZ OL'6ZZ OL'6 00'0 OLO'£ ISO'0 '8TZZ 09'6ZZ 09'6 00'0 Ot8'Z TSO'0 '8TZZ OS'6ZZ OS'6 00'0 0£S'Z 150'0 '8TZZ 06'6ZZ 06'6 00'0 0£L'T 1;0'0 '8IZZ 0£'6ZZ 0£'6 00'0 000'T IS0'0 '81ZZ OZ'6ZZ OZ'6 00'0 ;£6'0 TSO'0 '8IZZ O1'6ZZ O1'6 00'0 6ZT'0 ISO'0 '8IZZ 00'6ZZ 00'6 00'0 6Zt'0 1;0'0 'LTZZ 66'£ZZ 66'£ 00'0 IZI'0 ISO'0 'IOZZ 68'£ZZ 68'£ 00'0 8IT'0 OSO'0 '£LTZ 6L'£ZZ 6L'£ 00'0 ST1'0 660'0 '8£TZ 69'£ZZ 69'£ 00'0 Z11'0 8b0'0 '8602 6S'£ZZ 6S'£ 00'0 801'0 L60'0 '£;OZ 66'£ZZ 66'£ 00'0 601'0 960'0 '6002 6£'£ZZ 6£'£ 00'0 001'0 S60'0 'ZS6t 6Z'£ZZ 6Z'£ 00'0 S60'0 660'0 '9681 6T'£ZZ 6t'£ 00'0 060'0 Z60'0 '8£8I 60'£ZZ 60'£ 00'0 680'0 Z60'0 'ZEST 80'£ZZ 80'£ 00'0 880'0 Z60'0 '9Z8I LO'£ZZ LO'£ 00'0 580'0 Z60'0 'OZ8I 90'£ZZ 90'£ 00'0 £80'0 Z60'0 '6181 SO'£ZZ SO'£ 00'0 180'0 Z60'0 '8081 60'£ZZ 60'£ 00'0 6L0'0 T60'0 '96LT ZO'£ZZ ZO'£ 00'0 8L0'0 160'0 '06LT 10'£ZZ TO'£ 00'0 8L0'0 160'0 '68LT 00'£ZZ 00'£ 00'0 LLO'0 060'0 'BELT Z6'ZZZ Z6'Z 00'0 9L0'0 8£0'0 '1L9I Z8'ZZZ Z8'Z 00'0 6L0'0 L£0'0 '9091 ZL'ZZZ ZL'Z 00'0 £L0'0 9£0'0 '6£SI Z9'ZZZ Z9'Z • • • u) Pr-1- Ad..- I IN CA.) o inco,s1 c u 01 rrfac-L3 k I 0-n 5 kin C.-pus\ ___ (019 _ _ R ( 2- _ SECTION 6.4 WETPOOL FACIL)rDES1GNS • Till forest is all permanent onsite forest and/or shrub cover located on till soils that retains the natural understory vegetation and forest duff. irrespective of age, if densities are sufficient to ensure at least 80 percent canopy cover within 5 years. To be counted in this category, forest must be protected as permanent open space. Such areas may be placed in a separate open space tract or may be protected through covenants or conservation easements. Section 5.2.1 has a brief discussion of forested open space under the heading "Rural Residential Projects." • Outwash is soil that infiltrates well and as a result produces small amounts of runoff. SCS hydrologic soil groups classified as outwash soils include all A, most B, and some C soils. See Chapter 3 for classification of specific SCS soil types. Cover categories are based on existing U.S. Department of Agriculture soil survey data or site specific data where available. Next, coefficients specific to the four cover types are weighted by the drainage areas and then multiplied by the rainfall R from Step 2 to produce the runoff volume V,: = (0.9A, + 0.25A1 + 0.I OAS+ 0.01A0) x (R/12) (6 -13) where V, = volume of runoff from mean annual storm (cf) A; = area of impervious surface (sf) kg= area of till soil covered with grass (sf) A,. = area of till soil covered with forest (sf) Ao = area of outwash soil covered with grass or forest (sf) R = rainfall from mean annual storm (inches) Step 4: Calculate wetpool volume (Vb). Use the results of the previous steps to calculate the required wetpool volume according to the following equation: Vb = f V, (6 -14) where Vb = wetpool volume (cf) f = volume factor from Step I V, = runoff volume (cf) from Step 3 Step 5: Determine wetpool dimensions. Determine the wetpool dimensions satisfying the design criteria outlined below. A simple way to check the volume of each wetpool cell is to use the following equation: h(A1 + A,) = 2 where Vb = wetpool volume (cf) h = wetpool depth (ft) Al = water quality design surface area of wetpool (sf) A2 = bottom area of wetpool (sf) (6-15) Step 6: Design pond outlet pipe and determine primary overflow water surface. The design criteria for wetponds (see Section 6.4.1.2) calls for a pond outlet pipe to be placed on a reverse grade from the pond's wetpool to the outlet structure. Use the following procedure to design the pond outlet pipe and determine the primary overflow water surface elevation: a) Use the nomography in Section 4.3 (Figures 4.3.1.B and 4.3.1.C) to select a trial size for the pond outlet pipe sufficient to pass the WQ design flow Q „.y. b) Use Figure 4.3.1.F to determine the critical depth d, at the outflow end of the pipe for Q. 9/1/98 1998 Surface Water Design Manual 6 -70 6.4.1 WE7PONDS — BAS I ND LARGE — METHODS OF ANALYSIS FIGURE 6.4.1.A PRECIPITATION FOR MEAN ANNUAL STORM IN INCHES (FEET) ST 1.1 ST 1.0 ST 1.0/ LA 1.0 LA 1.2 LA 0.8 LA. 0.9 4: 0.54" (0.045') 0.47" (0.039') Incorporated Area River /Lake — Major Road 0.47" NOTE: Areas east of the easternmost isopluvial should use 0.65 inches unless rainfall data is available for the location of interest 24 The mean annual stone is a conceptual storrn found by dividing the annual precipitation by the total number of stone events per year i 0 (0..043043' 1 1 0.65" 0.56" (0.054') (0.047') result, generates large amounts of runoff. For this application, till soil types include Buckley and bedrock soils, and alluvial and outwash soils that have a seasonally high water table or are underlain at a shallow depth (less than 5 feet) by glacial till. U.S. Soil Conservation Service (SCS) hydrologic soil groups that are classified as till soils include a few B, most C, and all D soils. See Chapter 3 for classification of specific SCS soil types. 1998 Surface Water Design Manual 6 -69 9/1/98 • 1 .• Z. oN to 2 al FT cf_ kr 10 ro-r f=.0J \LD So 4-7 73 kr-c_c0 : 2-11 \toit..)v\e, • uuee_c____ _ v f•ne- w or\ 2- FT-3 Fr. + 3D4-7 71" cct I = METROSCAN PROPERTY PROFILE= King (WA) RECEIVED AUG 0 5 2002 Parcel Number Building Id # Parcel Type Owner /Taxpayer CoOwner Site Address Mail Address Telephone Recording Date Auditors Fee # Sale Price Deed Type % Owned Land Structure Total Levy Code OWNERSHIP INFORMATION : 004200 0085 08 :1 : Platted : Hedin Terrance L/Rose M : 4320 S 150Th St Tukwila 98188 : 4310 S 150Th St Tukwila Wa 98188 : Owner : 206 - 444 -5344 Q:NE S : 22 Tenant : SALES AND LOAN INFORMATION : 06/08/2000 : 1272 : $237,450 Full : Warranty : 100 Loan Amount Lender Loan Type Interest Rate Vesting Type ASSESSMENT AND TAX INFORMATION : $57,000 : $132,000 : $189,000 : 2413 Census Map Grid Neighborhood Cd Zoning Code Land Use Legal Sub /Plat Recording Num Short Plat Volume Jurisdiction % Improved 2001 Taxes Exempt Code: Excise Tax # PROPERTY DESCRIPTION : Tract: 282.00 : 655 E4 : 024010 : LDR : 002 Res,Single Family Residence : BLK 1 LOT 16 ADAMS HOME TRS 2ND :ADD Block: 4 : Adams Home Trs 2Nd Add • : 12 : TUKWILA Page : 90 COMMUNITY DEVELOPMENT T: 23N R : 04E : $179,100 : First Horizon Home Loan Corp : Conventional : Fixed : Married Persons : 70 : $2,721.58 :1757927 Profile -Page I of 2 Information compiled from various sources. Real Estate Solutions makes no representations or warranties as to the accuracy or completeness of information contained in this report. ,41r = METROSCAN PROPERTY PROFILE= King (WA) Parcel # : 004200 0085 Bedrooms :4 Bath Full : 1 Bath 3/4 Bath 1/2 : 1 Fireplace Deck Porch Stories : 1.5 Units :1 Elevator • Mobile Home: No Nuisance . Easements . Design Type : LAND INFORMATION Lot Acres Lot SqFt Lot Shape Tde /Upind TopoProbs Wtr Front Sprinkler WtrFrntSF GroundCvr Golf Adj ..91 : 39,446 : No Bldg Id # : 1 PROPERTY CHARACTERISTICS 1st Floor SF : 1,110 2nd Floor SF 3+ Floor SqFt . Halj Floor SF : 330 AboveGroundSF : 1,440 Finished SqFt : 1,440 Fin Bsmnt SF . UnfinBsmnt SF : 1,110 BsmntTotal SF : 1,110 Bsmnt Park SF : Building SqFt :2,550 Deck SqFt AttachedGrgSF : VIEW INFORMATION View View Seattle Skyline View Lake /River View Lake Sammamish View Mountain View Puget Sound View Mt. Rainier View Olympics View Cascades View Territorial View Lake Washington View Other : None Year Built : 1936 Efj Year . GarageType : Bsmnt Type : Yes BsmntGrade : Bldg Matl : Bldg Cond : Good Bldg Grade : Avg %Brick/Stone: HeatSource : Oil Heat Type : Frcd Air Sewer Type : Public Wtr Source : Water District STREET INFORMATION St Surface :Paved St Access : Public Profile -Page 2 of 2 Information compiled from various sources. Real Estate Solutions makes no representations or warranties as to the accuracy or completeness of information contained in this report. = METROSCAN PROPERTY PROFILE= King (WA) Parcel Number : Building Id # . Parcel Type . Owner /Taxpayer : CoOwner Site Address . Mail Address . Telephone Recording Date Auditors Fee # Sale Price Deed Type % Owned OWNERSHIP INFORMATION 004200 0086 07 1 Platted Hedin Terrance L;Horacek Rose M 4310 S 150Th St Tukwila 98188 4310 S 150Th St Tukwila Wa 98188 Owner : 206 - 444 -5344 Q : NE S : 22 Tenant : SALES AND LOAN INFORMATION : 06/08/1998 : 1430 : $159,950 Full : Warranty : 100 Loan Amount Lender Loan Type Interest Rate Vesting Type ASSESSMENT AND TAX INFORMATION Land : $51,000 Structure : $113,000 Total : $164,000 Levy Code : 2413 Census Map Grid Neighborhood Cd Zoning Code Land Use Legal Sub /Plat Recording Nutn Short Plat Volume Jurisdiction % Improved 2001 Taxes Exempt Code: Excise Tax # PROPERTY DESCRIPTION Tract: 282.00 655 E4 024010 LDR 002 Res,Single Family Residence BLK 1 LOT 17 ADAMS HOME TRS 2ND ADD E 1/2 OF LOT 17 Block: 4 : Adams Home Trs 2Nd Add • . 12 : TUKWILA Page : 90 T : 23N R : 04E $92,450 Emerald Mortgage Conventional Fixed Single Person : 69 : $2,361.61 :1617402 Profile -Page 1 of 2 Information compiled from various sources. Real Estate Solutions makes no representations or warranties as to the accuracy or completeness of information contained in this report. i = METROSCAN PROPERTY PROFILE= King (WA) Parcel # : 004200 0086 Bedrooms :3 Bath Full : 1 Bath 3/4 : 1 Bath 1/2 Fireplace Deck • Porch : Yes Stories :1 Units :1 Elevator • Mobile Horne: No Nuisance . Easements . Design Type : LAND INFORMATION Lot Acres Lot SqFt Lot Shape Tde /Upind TopoProbs Wtr Front Sprinkler WtrFrntSF GroundCvr Golf Adj :.45 : 19,723 : No Bldg Id # : 1 PROPERTY CHARACTERISTICS 1st Floor SF : 1,220 2nd Floor SF . 3+ Floor SqFt . Half Floor SF . AboveGroundSF : 1,220 Finished SqFt : 1,220 Fin Bstnnt SF . UnfinBsmnt SF : BsmntTotal SF . Bsmnt Park SF Building SqFt : 1,220 Deck SqFt AttachedGrgSF :440 VIEW INFORMATION View View Seattle Skyline View Lake /River View Lake Sammamish View Mountain View Puget Sound View Mt. Rainier View Olympics View Cascades View Territorial View Lake Washington View Other : None Year Built : 1998 Ejj Year . GarageType : Attached Bsmnt Type : BsmntGrade : Bldg Matl . Bldg Cond : Avg Bldg Grade : Avg %Brick/Stone: HeatSource : Gas Heat Type : Frcd Air Sewer Type : Public Wtr Source : Water District STREET INFORMATION St Surface : Paved St Access : Public Profile -Page 2 of 2 Information compiled from various sources. Real Estate Solutions makes no representations or warranties as to the accuracy or completeness of information contained in this report. Envinomd 14816 Milite Road South P.O. Box 0 Tukwila, WA 98168 Phone: (206) 242 -3236 Fax: (206) 242 -1527 RECEIVED AUG 05 2002 COMMUNITY DEVELOPMENT CERTIFICATE OF SEWER AVAILABILITY /NON - AVAILABILITY Certificate of Sewer Availability OR ❑ Certificate of Sewer Non - Availability Part A: (To Be Completed by Applicant) Purpose of Certificate: ❑ Building Permit ❑ Preliminary Plat or PUD ❑ Other ❑ Short Subdivision ❑ Rezone Proposed Use: ® Residential Single Family ❑ Residential Multi- Family ❑ Commercial ❑ Other Applicants Name: Do -' LCN (c, Phone: g•pp —8 %;Z • -g16, Property Address or Approximate Location: Tax Lot Number: X 310 S 1 co t'-' s'i-- Legal Description(Attach Map and Legal Description if necessary): A I e cJ f' 1� e i" L61 1 ?d eir It 1 S.��,1 j 4 i.l4,,,, to 44" I ftbin. e Ilfe, -1'1' Part B: (To Be Completed by Sewer Agency) 1. ❑ a. Sewer Service will be provided by side sewer connection only to an existing size sewer feet from the site and the sewer system has the capacity to serve the proposed use. OR ® b. Sewer service will require an improvement to the sewer system of: ❑ (1) feet of sewer trunk or lateral to reach the site; and /or ❑ (2) the construction of a collectiop system on the site; and /or 1 cil (3) other (describe): Pc iI L co 0, p e- l 04-1 of- a 0 cA/C- 10 -KJ 1~ Al-eft rsaw 2. (Must be completed if 1.b above is checked) Lil a. The sewer system improvement is in conformance with a County approved sewer comprehensive plan, OR ❑ b. The sewer system improvement will require a sewer comprehensive plan amendment. 3. CA a. The proposed project is within the corporate limits of the District, or has been granted Boundary Review Board approval for extension of service outside the District, OR ❑ b. Annexation or BRB approval will be necessary to provide service. 4. Service is subject to the following: PERMIT: $ a. District Connection Charges due prior to connection: GFC: $ /JrJSFC: $ UNIT: $ TOTAL: $ (Subject to Change on January 1st) King County/METRO Capacity Charge: Currently, $1784.54 /residential equivalent, will be billed directly by King County after connection to the sewer system. (Subject to change by King Co/Metro without notice.) b. Easements: ❑ Required 9 May be Required c. Other: I he fr y certify that the abode sewer agency information is true. This certification shall be valid for one year date of signature By Title Date "2/A.V/o 14816 MilitiftRoad South P.O. Box 6 0 RECEIVED Tukwila, WA 98168 Phone: (206) 242 -3236 AUG 0 5 2002 Fax: (206) 242 -1527 COMMUNITY DEVELOPMENT CERTIFICATE OF SEWER AVAILABILITY /NON- AVAILABILITY 41, Certificate of Sewer Availability OR ❑ Certificate of Sewer Non - Availability Part A: (To Be Completed by Applicant) Purpose of Certificate: ❑ Building Permit ❑ Preliminary Plat or PUD ❑ Other ❑ Short Subdivision ❑ Rezone Proposed Use: q Residential Single Family ❑ Residential Multi- Family ❑ Commercial ❑ Other Applicants Name: i7 o n 2-6q, 10 Phone: S,00 ..- e y 2 —g Ll 6 Z, Property Address or Approximate Loation: Tax Lot Number: y'39.© C. I D y S/ Legal Description(Attach Map and Legal Description if necess ry): )-�, j— 14 al o cic- 4 J Seco ,4J -1. � to 4 /ukii f He oL pre= 0:113. Part B: (To Be Completed by Sewer Agency) 1. ❑ a. Sewer Service will be provided by side sewer connection only to an existing size sewer feet from the site and the sewer system has the capacity to serve the proposed use. OR 5 b. Sewer service will require an improvement to the sewer system of: ❑ (1) feet of sewer trunk or lateral to reach the site; and /or ❑ (2) the construction of a collection system on the site; and /or 71-C P(3) other (describe): ea 1 11 h pc_vac f' CPI t-31, Y' .J j c-'z 2. (Must be completed if 1.b above is checked) a. The sewer system improvement is in conformance with a County approved sewer comprehensive plan, OR ❑ b. The sewer system improvement will require a sewer comprehensive plan amendment. 3. tt. a. The proposed project is within the corporate limits of the District, or has been granted Boundary Review Board approval for extension of service outside the District, OR ❑ b. Annexation or BRB approval will be necessary to provide service. 4. Service is subject to the following: PERMIT: $ a. District Connection Charges due prior to connection: GFC: $ PS-04-04-5- O /of SFC: $ UNIT: $ TOTAL: $ (Subject to Change on January 1st) King County/METRO Capacity Charge: Currently, $1784.54 /residential equivalent, will be billed directly by King County after connection to the sewer system. (Subject to change by King Co/Metro without notice.) b. Easements: ❑ Required 14 May be Required c. Other: I h by certify that the above sewer agency information is true. This certification shall be valid for one year fro e date of sig ure. Y Title 7/)/ Date STATE OF WASHINGTON COUNTY OF KING • CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98/88 Telephone: (206) 431 -3670 FAX (206) 431 -3665 E -mail: tukplan(7ci.tukwila.wa.us • RECEIVED AUG 0 5 2002 COMMUNITY DEVELOPMENT AFFIDAVIT OF OWNERSHIP AND HOLD HARMLESS PERMISSION TO ENTER PROPERTY ss The undersigned being duly swom and upon oath states as follows: 1. I am the current owner of the property which is the subject of this application. 2. AU statements contained in the applications have been prepared by me or my agents and are true and correct to the best of my knowledge. 3. The application is being submitted with my knowledge and consent. 4. Owner grants the City, its employ4es, agents, engineers, contractors or gther representatives the right to enter upon Owner's real property, located at 3I o ``�� q �j,3 (') 5 O Al q t be for the purpose of application revidw, for the limited time necessary to complete that purpose. 5. Owner agrees to hold the City harmless for any Toss or damage to persons or property occurring on the private property during the City's entry upon the property, unless the loss or damage is the result of the sole negligence of the City. 6. The City shall, at its discretion, cancel the application without refund of fees, if the applicant does not respond to specific requests for items on the "Complete Application Checklist" within ninety (90) days. EXECUTED at / (city), • WA (state), on o? 20 0 2-- C• AJCti (Print Name) °4310 So lsa 51 1-utaJ(c..0 wit Q-1 e i geD (Address) c7O6 - 671- I (Phone Number) r ose /)/// eAu (Signature) J On this day personally appeared before me TcF,x t 7� Jf r c_c �% e CV' LA to me known to be the individual who executed the foregoing instrument and acknowledged that he/she signed the same as his/her voluntary act and deed for the uses and purposes mentioned therein. SUBSCRIBED AND SWORN TO BEFORE ME ON THIS q DAY .44.41A ARY PUBLIC in and for the State of W I hington residing at (-i(t [t ' Z k -vii( JiA • , 20 Co I— My Commission expires on / D •Z Y • d5 THOMAS S. STANIFER STATE OF WASHINGTON NOTARY—•— PUBLIC WY COMMISSION EXPIRES 10 -29-05 KC Quarterly Parce. report - April 2002 377930 0180 377930018009 HEAK LAM NW 23 -23-4 18 JUNCTION THE 5622 S 150TH ST 886400 0450 886400045003 HEALY JOHN M +NANCY RICHELLIS SW 15 -23-4 13 5 VAL -VUE ADD 13711 34TH AV S 177050 0330 177050033006 HEATH ROBERT D JR SE 23 -23-4 UNIT 1 BLD F COTTAGE CREEK 15344 62ND AV S 537920 0175 537920017507 HEATH SYLVAI A NW 26 -23-4 15 2 MC MICKEN HEIGHTS DI 16659 53RD AV S 115720 0380 115720038005 HEATHER WOOD APARTMENTS NW 23 -23-4 37 & BROOKVALE GARDEN T 5821 S 152ND ST 788895 0370 788895037000 HECK ROBIN L SW 23 -23-4 UNIT D- BLD D SOUTHCENTER VIEW 15210 MACADAM RD S 167040 0038 167040003805 HECKT JAMES W +REBECCA J SW 14 -23-4' 4 1 COLEGROVES ACRE TR 13946 51ST AV S 004200 0086 004200008607 HEDIN TERRANCE L NE 22 -23-4 17 1 ADAMS HOME TRS 2ND 4310 S 150TH ST 004200 0085 004200008508 HEDIN TERRANCE L +ROSE M NE 22 -23 -4 16 1 ADAMS HOME TRS 2ND 4320 S 150TH ST 547680 0066 547680006608 HEDLUND EDNA M SE 3 -23-4 8 MERRICKS ACRE TRAC 4618 S RYAN WY 000280 0010 000280001009 HEGRE DAVID H SW 14 -23-4 POR FOSTER JOSEPH # 39 14036 55TH AV S 004200 0048 004200004804 HEINIG MARION E NE 22 -23-4 8 - 9 1 ADAMS HOME TRS 2ND 4447 S 148TH ST 222304 9104 222304910409 HEINRICHSON GENE C +DONNA L SE 22 -23-4 4650 S 160TH ST 000300 0064 000300006400 HEITZ ZACHARY A +JENINE B SW 14 -23-4 FOSTER STEPHEN # 38 13612 52ND AV S 017900 2385 017900238506 HELDE KAREN A SW 11 -23-4 27 -28 -2 12 ALLENTOWN ADD 12537 51ST AV S 017900 2400 017900240007 HELDE SHIRLEY +HELDE KAREN SW 11 -23-4 30 -31 12 ALLENTOWN ADD 152304 9197 152304919706 HELLAND JASON K SE 15 -23-4 4804 S 144TH ST 092304 9102 092304910208 HELMS E KEITH SE 9 -23-4 12455 TUKWILA INTERNATIO BL 092304 9117 092304911701 HELMS KEITH SE 9 -23-4 12471 TUKWILA INTERNATIO BL 211130 0010 211130001004 HEMBREE MARK V NW 23 -23-4 2 DUFFS HAZELWOOD AD 5616 S 147TH ST 734060 0768 734060076803 HEMENWAY HAROLD JAMES NW 15 -23-4 50 RIVERSIDE INTERURBA 734060 0681 734060068107 HEMENWAY JOHN D SW 10 -23-4 46 RIVERSIDE INTERURBA 12621 42ND AV S 734060 0660 734060066002 HEMENWAY PHILIP SW 10 -23-4 45 RIVERSIDE INTERURBA 4036 S 128TH ST 734060 0663 734060066309 HEMENWAY PHILIP SW 10 -23-4 45 RIVERSIDE INTERURBA 734060 0665 734060066507 HEMENWAY PHILIP SW 10 -23-4 45 RIVERSIDE INTERURBA 4040 S 128TH ST 734060 0681 734060068180 HEMENWAY PHILIP SW 10 -23-4 46 RIVERSIDE INTERURBA 12621 42ND AV S 192080 0005 192080000503 HEMMERLING DONALD NW 15 -23-4 1 -2 A DAVIS REPLAT TRACT S 130TH ST 192080 0015 192080001501 HEMMERLING DONALD NW 15 -23-4 3-4 A DAVIS REPLAT TRACT 13011 40TH AV S 734060 0061 734060006107 HEMMERLING DONALD G NW 10 -23-4 3 RIVERSIDE INTERURBA 4020 S 119TH ST 734760 0300 734760030001 HEMMINGSEN GERALDINE SE 15 -23-4 1 -2 4 RIVERTON MACADAM R 4507 S 137TH ST 186520 0250 186520025005 HENDERSON DOUGLAS N SE 23 -23-4 UNIT A- CRYSTAL RIDGE 15325 SUNWOOD BL 334740 0265 334740026508 HENDRICK HOLLY V NE 10 -23-4 47-48 2 HILLMANS CD MEADOW 11854 42ND AV S 810860 0840 810860084005 HENDRICKS CECIL G SE 22 -23-4 113 SUNNYDALE GARDENS 4735 S 158TH ST 810860 0842 810860084203 HENDRICKS CECIL G SE 22 -23-4 113 SUNNYDALE GARDENS 735860 0155 735860015503 HENDRICKS FELLIE M NW 15 -23-4 16 3 ROBBINS ORCHARD AD 13343 35TH AV S 735860 0160 735860016006 HENDRICKS FELLIE M SR NW 15 -23-4 .17 3 ROBBINS ORCHARD AD 13341 35TH AV S 152304 9202 152304920209 HENDRICKS MARK R SW 15 -23-4 3514 S 142ND ST 222304 9016 222304901606 HENDRIX JANIE L SE 22 -23-4 15909 48TH AV S 217200 0320 217200032001 HENDRY SONJA L NW 14 -23-4 63 -64 EAST RIVERTON GARD 13008 57TH AV S 547680 0281 547680028107 HENG PO KIM +CHENG -HY AP -HEN SE 3 -23-4 30 -31 MERRICKS ACRE TRAC 4713 S 104TH PL 004100 0517 004100051707 HENKLE FAMILY TRUST NW 22 -23-4 4 -5 4 ADAMS HOME TRS 1ST 15001 TUKWILA INTERNATIO BL 004100 0631 004100063108 HENNO VERNICE A NW 22 -23-4 21 -22 4 ADAMS HOME TRS 1ST 4008 S 152ND ST 886400 0835 886400083509 HENRY BILLY D +DANA R SW 15 -23-4 18 7 VAL -VUE ADD 13849 38TH AV S 004200 0113 004200011304 HENRY EDWARD JR +VERTELLA A NE 22 -23-4 20 1 ADAMS HOME TRS 2ND 14850 42ND AV S 211130 0015 211130001509 HENRY GLENN NW 23 -23-4 3 DUFFS HAZELWOOD AD 5614 S 147TH ST 886400 0735 886400073500 HENRY SCOTT G JR SW 15 -23-4 39 6 VAL -VUE ADD 3509 S 137TH ST 150800 0640 150800064001 HENSRUD ROBERTA A SW 22 -23-4 UNIT 64_BLD10 CHALET SOUTH 4024 S 158TH ST 885880 0010 885880001007 HEPPENSTALL MILDRED R NW 26 -23-4 2 1 VALLEY VIEW HOMES A 16615 53RD AV S 681840 0040 681840004003 HERBEL JAMES D NW 26 -23-4 4 PLEASANT HEIGHTS NO 16243 52ND AV S 766160 0240 766160024002 HERGERT ERIK E +JENNIFER L NW 23 -23-4 13 SEATTLE LAND COS 5 A 14720 MACADAM RD S 170100 0230 170100023002 HERING TERESA A SW 15 -23-4 UNIT 23 COLONY SQUARE THE 13550 37TH AV S Page 42 of 115 CITY OF TUKWILA Public Works Department DEVELOPMENT BROCHURE 2 GEOTECHNICAL REPORT GUIDELINES A geotechnical report helps determine if the proposal for a site is appropriate. A geotechnical report contains information used to design retaining walls, foundations, hazardous waste facilities, and infiltration systems, such as trench drains, sand filters and septic drain fields. Geotechnical reports also supply information for settlement analysis, liquefaction, structural fill, and storm .water design. The City requires geotechnical reports for the following: • Projects in the sensitive area overlay • Riverbank Stability • Hazardous Waste Facility Design • Retaining walls over 4 feet high • Grading in excess of 500 cubic yards • Surface water ponds and vaults • Storm drainage feasibility evaluation In addition to the above cases, the City may request a geotechnical report when the project or site conditions warrant. Independent Review The City sends each Geotechnical Report, except storm drainage feasibility, to a geotechnical firm of its choice for an independent review. The Applicant pays the cost of the review. Storm Drainage When the soils on site meet the feasibility requirements in the King County Surface Water Design Manual, infiltration of roof downspout drains is required. All infiltration design must be accompanied by a feasibility evaluation per the King County Surface Water. Design Manual. Infiltration design does not require a report as described in Report Requirements, unless the project meets additional cases listed above. Affidavits In sensitive areas, the Applicant /Owner shall provide completed affidavits and a covenant, all of them notarized and in a recordable format. Samples are included at the end of this Brochure. Report Requirements The geotechnical report must be prepared, stamped, signed, and dated by a Washington State licensed geotechnical engineer as defined in the Public Works Infrastructure Design and Construction Manual. 04.20.01 1 Revised 05.05.02 DEVELOPMENT BROCHURE 2 GEOTECHNICAL REPORT GUIDELINES Classification Except for infiltration feasibility evaluation, all soil characteristics and classifications shall be per ASTM standards. Soil descriptions shall include erodability, liquefaction, expandability, and bearing strength. The logs shall show the date, hole, or pit number, elevations for each log relative to the same datum, ground water elevation, soil description, and soil classification. Contents The report shall address liquefaction when any of the following apply: 1. Ground water level 50 feet or less below existing ground, 2. Unconsolidated sandy alluvium, 3. Seismic zones 3 and 4. report shall discuss all of the following that apply to the site: 1. Potential effects on and near the site 2. Surface and subsurface conditions 3. Drainage 4. Erosion 5. Slope stability 6. Excavation /fill 7. Settlement /preload /risk analysis, including monetary liability 8. Slope stability 9. Setbacks 10. Retaining walls /piles /subgrade walls 11. Pavement At a minimum the geotechnical report shall include: 1. Vicinity map 2. Names, addresses, and phone number of those who prepared the report 3. Project description, 4. Plans showing: • Bore or test pit locations, • Sensitive areas such as steep slopes, drainage, and wetlands, • Property limits, terrain details, and drainage, • Accurate existing contours and expected contours following land altering, • Proposed drainage and related construction, • Footprints of structures onsite and within 15 feet of the property limits, 5. Dates the site investigations were performed, 6. Soil logs and soil profiles, 7. Conclusions, including whether the proposed project is appropriate for the site, 8. Design recommendations, 9. Construction recommendations, and 10. Monitoring recommendations. 2 DEVELOPMENT BROCHURE 2 GEOTECHNICAL REPORT GUIDELINES Plan Notes Add the following notes to the plans. 1. I, , the design architect /structural engineer, reviewed the geotechnical report, titled , prepared by , and dated I understand the report's recommendations, I explained to the Owner the risks due to slides and I incorporated the recommendations into the design. I established measures to reduce potential risk of injury or damage that might be caused by any earth movement predicted in the report. Signature Date 2. Any changes to the approved plans require approval from the design engineer, . contact at and the geotechnical engineer, , contact at References TMC 16.54, 18.06, 18.45, 18.46, 18.104, and 21.04 1997 Uniform Building Code Chapter 18 and Appendix 33 King County Surface Water Design Manual, 1988, Chapters 3.2.2, 5.1.1, and 5.4 3 DEVELOPMENT BROCHURE 2 GEOTECHNICAL REPORT GUIDELINES PROVIDE NOTARIZED RECORDED COPY. GEOTECHNICAL AFFIDAVIT vackm DESIGN ENGINEER I " Legal Description: Parcel Numbers. City of Tukwila Permit Numbers I have reviewed the geotechnical report, , _....e,.::..0 prepared by . , and dated /„... 7„ • ...' :/ \ . I understand the report's recommendations and I have explained r of haye'fiad-\ explained to the owner the risks of loss due to slides on the site.."1:--ho.::::/ incorporated the geotechnical recommendations into the site desigri<gria,have \\,:;› established measures to reduce the potential risk of injury or damage thsat, might be caused by any earth movement predicted in the report. 4 DEVELOPMENT BROCHURE 2 GEOTECHNICAL REPORT GUIDELINES PROVIDE NOTARIZED RECORDED COPY GEOTECHNICAL AFFIDAVIT FROM GEOTECHNICAL ENGINEER _ Legal Description: r` ''''''''''''''''''''' Parcel Numbers City of Tukwila Permit Numbers In my judgement, upon review of the construction plans and specifications for theplans and specifications conform to the geotechnical recommendation's j Tade in the; >: geotechnical report, titled 1\ and dated In my judgement, the risk to the proposed development from soil insta iti y will be minimal and the proposed development will not increase the potential for soil movement, subject to the conditions set forth in my report. 5 DEVELOPMENT BROCHURE 2 GEOTECHNICAL REPORT GUIDELINES PROVIDE NOTARIZED RECORDED COPY GEOTECHNICAL AFFIDAVIT FROM OWNER Legal Description: Parcel Numbers City of Tukwila Permit Numbers Geotechnical Report titled: Prepared by.: Dated: �•N. �,.`, I understand and accept the risk of developing in an area with potential\ . unstable soils. `ti • 6 DEVELOPMENT BROCHURE 2 GEOTECHNICAL REPORT GUIDELINES PROVIDE NOTARIZED RECORDED COPY GEOTECHNICAL COVENANT r OM THE OWNER Legal Description: Parcel Numbers City of Tukwila Permit Numbers Geotechnical Report titled: Prepared by: Dated: This site is in an area of potential geologic instability, as determined,by.,the • City of Tukwila. The risks associated with development of this site are:.\ \ Conditions or prohibitions on development of this site are: Design features, which require maintenance or modification to address anticipated soil changes, are: I, , waive any claims I, my successors or assigns may have against the City for any Toss or damage to people or property, either on or off the site, resulting from soil movement arising out of the issuance of any permit(s) authorizing development on the site. 7 41.4010../ 1 ,5 •y3/ •oo" s• 1 4 6 714 0 6J• 4, PCL2 > a °O y• td' -,fib 1,1? ' 1 to igS11,601 %o {Jo IP 380208 78210719 LOT 1 HAD 06 21 to N1t•sau+1 121.17 dlbs ;05 • LOT 3p = ^-- gob 0g13 ��z.I fLera g 4 1 4,r ;" E M!r_J1.,.M I...M u .1 tTUSPL96.0040 8 9 /03050337 3I £07 / 4 do M -�y Ay e te1 . 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