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HomeMy WebLinkAboutSEPA E05-014 - PARNELL ROBERT / RN PARNELL - REHAL SHORT PLATE05 -014 REHAL 2 -LOT SHORT PLAT 136011 42 AV S City of Tukwila Steven M. Mullet, Mayor Department of Community Development Steve Lancaster, Director May 1, 2006 Mr. Robert N. Parnell RN Parnell 4422 187th Ave SE Issaquah, WA 98027 RE: Rehal Short Plat, L05 -058, E05 -014 Expiration Dear Mr. Parnell: Tukwila Municipal Code (TMC) 18.10.130 (A) allows the City to cancel an application when an applicant fails to respond to a comment/correction letter within 90 -days. The City issued a comment letter for the above project on January 13, 2006. Additionally, the City sent you a letter dated March 23, 2006 informing you that the pending application would be canceled if the items in the January 13, 2006 letter were not addressed by May 1, 2006. The above applications are canceled. If you wish to proceed on the above short plat and SEPA application you must submit a new application. The application will be reviewed under the applicable regulations at the time of submittal. If you have any questions, please call (206) 431 -3684 or send an email to bmiles(cDci.tukwila.wa.us. Sincerel Br don J. Iles Assistant Planner cc. Nora Gierloff, Planning Supervisor Jill Mosqueda, Public Works Files (L05 -058, E05 -014) 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: 206 - 431 -3670 • Fax: 206 - 431 -3665 • Ciz of Tukwila Steven M. Mullet, Mayor Department of Community Development Steve Lancaster, Director October 24, 2005 Mr. Robert Parnell 4422 187th PL SE Issaquah, WA 98027 RE: Rehal Short Plat and SEPA Application 13601 '/2 42 °d Ave S L05 -058, E05 -014 Dear Mr. Parnell: The City of Tukwila has completed its first review of the above mentioned short plat application. A draft comment letter is prepared and ready to be sent out. However, before the comment letter can be completed the City must first conclude the mandatory Notice of Application period. As of today, the City has yet to receive a complete list of tenants and property owners within 500 feet of the project property and the public notice board has not been installed. The City's inability to start the Notice of Application period is delaying the project. Please have the mailing labels to the City and the Notice Board installed by Monday, October 31, 2005. If you have any questions, please call (206) 431 -3684 or send an email to bmiles @ci.tukwila.wa.us. (Bdon Assistant Planner cc. File (L05 -058) 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: 206 - 431 -3670 • Fax: 206- 431 -3665 [Brandon Miles - RE: Mailing Labels for R al Short Plat Public Notice From: Brandon Miles To: Robert Parnell Date: 10/20/05 1:39PM Subject: RE: Mailing Labels for Rehal Short Plat Public Notice Robert, _Page 1 My comment letter regarding the short plat is near completion. But it would be premature for me to send it until the Notice of Application period is complete. So as soon as the board is up the sooner the Rehals can get the comment letter. Brandon J. Miles Assistant Planner Department of Community Development City of Tukwila tel (206) 431 -3684 fax (206) 431 -3665 bmiles @ci.tukwila.wa.us »> "Robert Parnell" <rnparnell @hotmail.com> 10/19/05 10:15AM »> Brandon Miles - Height 0 From: Brandon Miles To: rnparnell @hotmail.com Date: 10/10/05 2:23PM Subject: Height Bob, I was reading the SEPA Checklist and it was noted that the maximum height of the structures on the property was proposed to be 35 feet. The maximum height permitted in the LDR zone is only 30 feet. Please pass this on to the Rehal's when they are getting building plans prepared. Thanks, Brandon J. Miles Assistant Planner Department of Community Development City of Tukwila tel (206) 431 -3684 fax (206) 431 -3665 bmiles @ci.tukwila.wa.us Brandon Miles - Incomplete Checklist • From: Brandon Miles To: rnparnell @hotmail.com Date: 10/10/05 2:30PM Subject: Incomplete Checklist Bob, Some pages of the SEPA checklist were not completed. Please see the attachment of those sections that I still need. I need this back ASAP. Thanks, Brandon J. Miles Assistant Planner Department of Community Development City of Tukwila tel (206) 431 -3684 fax (206) 431 -3665 bmiles @ci.tukwila.wa.us jBrandon Miles _- Geo - Techincal Report From: Brandon Miles To: rnparnell @hotmail.com Date: 10/10/05 11:44AM Subject: Geo - Techincal Report Bob, Page 1 reviewed the geo -tech report and it still does not fully address building on proposed lot 1. On page 1 of the report it notes that the property will be subdivided and a house will be constructed on each lot. However, the report only makes a conclusion and recommendation for lot 2 development and does not make any conclusion or recommendation for lot 1. Brandon J. Miles Assistant Planner Department of Community Development City of Tukwila tel (206) 431 -3684 fax (206) 431 -3665 bmiles@ci.tukwila.wa.us Brandon Miles - Mailing Labels • From: Brandon Miles To: rnparnell @hotmail.com Date: 10/10/05 10:54AM Subject: Mailing Labels Bob, I want to start the Notice of Application period for the Rehal short plat. I went through the files and cannot seem to locate the mailing labels. Can you please get me one set of mailing labels for all property owners and tenants within 500 ft of the project site. Thanks, Brandon J. Miles Assistant Planner Department of Community Development City of Tukwila tel (206) 431 -3684 fax (206) 431 -3665 bmiles@ci.tukwila.wa.us Page_1j GEOTECHNICAL EVALUATION RFP -ORT., PROPOSED RESIDENT SHORT PLAT \ 13601 -1/2 42ND AVE TUKWILA, WASHINGTON G- 1948 -1 Prepared for Mr. Kulbir Singh Rehal 6229 South 238`h Street, Apt. L202 Kent, Washington 98032 June.22, 2005 GEO Group Northwest, Inc. 13240 NE 20th Street, Suite 10 Bellevue, WA 98005 Phone: (425) 649 -8757 / Fax: (425) 649 -8758 RECEIVED SSEP. 2 3 20051 DEVELOPMENT a Group Northwest, Inc. Geotechnical Engineers, Geologists & Environmental Scientists June 22, 2005 Mr. Kulbir Singh Rehal 6229 South 238th Street, Apt. L202 Kent, Washington 98032 Subject: GEOTECHNICAL EVALUATION REPORT PROPOSED SINGLE FAMILY RESIDENCE 13601 -1/2 42ND AVENUE SOUTH TUKWILA, WASHINGTON Dear Mr. Rehal: G- 1948 -1 GEO Group Northwest, Inc., is pleased to submit this geotechnical evaluation report for the above - referenced project site in Tukwila, Washington. This report presents the results from our review of the geologic map of the site vicinity and our subsurface investigation on December 17, 2004. The purpose of this report is to provide geotechnical recommendations for the proposed single family residence. This report was prepared in accordance with our proposal to you dated November 29, 2004. Based upon discussions with you and Mr. Baljit Sehmby of John L. Scott Realtors we understand that the site will be subdivided into two lots, and a new residence will be built on each lot. SITE DESCRIPTION The project site is located on the western side of the 13600 block of 42nd Avenue South in Tukwila, Washington as illustrated in Plate 1 - Vicinity Map. The project site consists of an irregular- shaped land parcel to be divided into two undeveloped residential lots (identified as Lot 1 and Lot 2). The lots share a common driveway with a lot with address 13601. A two -story home with basement/garage was recently constructed on the adjacent lot located immediately north and west of the site (13601 - 42 "d Avenue South). This adjoining property shares a 13240 NE 20th Street, Suite 10 • Bellevue, Washington 98005 Phone 425/649 -8757 • FAX 425/649 -8758 June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 2 common driveway with the project site for access to 42 "d Avenue South. The site configuration is illustrated in Plate 2 - Site Map. The site topography consists of moderate to steep north and northeast facing slopes located on the south side of the site and along the north and east sides of the site adjacent to 42 "d Avenue South. We estimate that the moderate to steep north and northeast facing slopes have inclinations of roughly 40 to 50 degrees from horizontal. The remainder of the site consists of three relatively level bench areas which are separated by 8 to 10 foot high steep slopes. The topography of the site is illustrated in both Plate 2 - Site Map, and in Plate 2A - Steep Slope Areas. Portions of the steep slopes located between the benches are faced with brick walls. Most portions of the walls were completely covered by vegetation. At least at one location, it was apparent that crushed rock and quarry spall rock may have been added to silty site soils and placed behind the walls. A portion of a free - standing cement block wall was located on the western side of the site. The walls may be the remnants of a previous building. The project site is heavily vegetated with blackberry bushes, ivy, and some small deciduous trees. A few larger evergreens are located near the top of the north - facing slopes on the southern side of the site property. GEOLOGIC OVERVIEW According to the geologic map for the site vicinity, soils at the site are described as either glacial till (Qgt) or undifferentiated drift (Qu). The glacial till soils reportedly consist of silt, sand and gravel which was overridden by glaciers during the Vashon stade of the Fraser glaciation. The undifferentiated drift soils are pre - Vashon silt and sand soils. SUBSURFACE CONDITIONS We visited the site on December 17, 2004, to conduct a subsurface investigation. We probed soils on the steep slopes with a 1/2-inch diameter hand probe. Probe penetrations ranged from 6 GEO Group Northwest, Inc. � June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 3 to 8 inches. Soils on the slopes appeared to consist of relatively firm sandy SILT and silty SAND. We also investigated the condition of the surficial site soils by excavating three test pits at the locations shown on the attached Plate 2 - Site Map. At test pit TP -1, soils encountered consisted of loose gravelly silty SAND with quarry spall rock and fine sandy SILT overlying dense gravelly sandy SILT and gravelly silty SAND at a depth of 3.5 feet below ground surface. Quarry spall rock encountered within the overlying gravelly silty SAND suggests that some fills were located at the TP -1 location. Soils encountered in the test pits TP -2 and TP -3 consisted of loose silty SAND and gravelly sandy SILT overlying dense fine silty SAND at depths of 1 to 3.5 feet below ground surface. No groundwater seepage was encountered at the test pit locations. We encountered a 6 -inch diameter PVC pipe at 2.5 to 3 feet below ground surface at test pits TP- 2 and TP -3. Please refer to Plates 4 and 5 - Test Pit Logs for subsurface details. SENSITIVE AREAS EVALUATION The project site has areas moderate and steep slopes, ranging up to 70 percent inclination. These areas are located along the west side of Lot 2, along the north and east sides of Lot 1, and in the southern portion of Lot 1. The steep slope area along the north side of Lot 1 appears to have been created by previous grading associated with construction of the driveway for the existing nearby house west of Lot 1, and much of this slope appears to be located in the right -of -way for 42' Avenue South. Therefore, this slope may be exempt from City of Tukwila sensitive areas regulations, per Sections 18.45.130B(3) and (4) of the Tukwila Municipal Code (slopes created through legal grading activities under an approved permit, and roadway embankments within right -of -way road easements). The other steep slope areas appear to be primarily natural features that may have been somewhat modified by past grading, based on the observed presence of surficial fills and abandoned walls on the site. The extent of the steep slope areas are illustrated in Plate 2A - Steep Slope Areas. The soils encountered in the test pits that were excavated on the project site consisted of dense, native, silty sand and sandy silt below depths of approximately 3 to 4 feet in TP -1 and TP -3, and below approximately 1 foot in TP -2. No groundwater seepage was observed in the test pits. We also observed no evidence of-past instability or earth movement on nor immediately adjacent to the project site during our investigation. Based on these findings and understandings, we GEO Group Northwest, Inc. June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 4 conclude that the project site is stable in its present condition, and the proposed short subdivision of the site will not adversely affect the stability of the site. The proposed development of Lot 2 with a new single - family residence should be designed so that a building setback distance (geologic hazard buffer) of at least 10 feet is maintained from the top of the steep slope on the west side of the lot. This recommended building setback is based on the anticipation that the proposed residence will have conventional shallow strip and column footing foundations. If a narrower setback distance from the steep slope is desired, the portion of the residence within 10 feet of the slope will need to be supported on deep foundations, such as augered concrete piles. We recommend that additional subsurface investigation be performed on the west part of Lot 2 if deep foundations are proposed for the residence. EVALUATION OF ON -SITE INFILTRATION ALTERNATIVES GEO Group Northwest, Inc., understands that on -site infiltration of site storm water is proposed for the two -lot subdivision, because no storm water utility is located in proximity to the site. Based on the proposed development of the site lots as single - family residences and the absence of an established storm water utility line in the nearby right -of -way, limited on -site infiltration for storm water is appropriate for the project. GEO Group Northwest, Inc., reviewed on -site infiltration alternatives as outlined and approved per the King County, Washington, Surface Water Design Manual, Appendix C (Small Site Drainage Requirements). For the project site, flow control alternatives (per Section C.2 of the design manual) include 1) infiltration trenches and drywells, dispersion best management practices (BMPs), and perforated tightline connections. The site soils typically consist of dense silty sand and sandy silt below the surficial layers of topsoil and fills. We anticipate that these soils will have limited infiltration capacity for the proposed site development. For this reason, we recommend that the site stormwater for Lot 2 be managed via dispersion BMPs such as splash blocks and dispersion trenches for roof downspouts. Sheet flow dispersion should be used for the driveway area. The on -site stormwater dispersion BMPs should be located at least 10 feet away from the steep slope area on the west side of Lot 2, and also at least 5 feet from the lot boundaries, per the GEO Group Northwest, Inc. June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 5 design manual recommendations. This means that splash blocks may not be appropriate for the west side of the proposed residence, and roof downspouts may need to be tightlined to a dispersion trench located away from the steep slope. Site stormwater on Lot 1 can be similarly managed in the future when the lot is developed. CONCLUSIONS AND RECOMMENDATIONS FOR LOT 2 DEVELOPMENT General Based on the results of our study, it is our professional opinion that the site is geotechnically suitable for the proposed single family residence on Lot 2. The proposed new building can be supported on conventional spread footings bearing on the dense native soils or on compacted structural fill placed on top of the dense native soils. Based upon our subsurface investigation the dense native soils were located at depths ranging from 1 to 3.5 feet below ground surface at the test pit locations. GEO Group Northwest, Inc., should be retained to verify that the new home foundation is bearing on the dense site soils at the time of construction, prior to the foundation pour. Earthwork and Grading The site should be cleared of debris associated with previous structures and improvements on the site, as well as any leftover fills, topsoil, organics, or debris located in construction areas. These materials should be hauled off site or used for landscaping, where appropriate; they should not be used as structural fill. The existing concrete block walls on the south part of Lot 2 can be dismantled, and the area can either be regraded to have permanent slopes not steeper than 2H:1V or can be finished with rockeries or new retaining walls, as desired. Subgrade Preparation After the completion of site clearing and excavation work, soil subgrade areas for new structures (such as buildings, concrete slabs, sidewalks, or pavements), shall be prepared to a firm and unyielding condition for construction. The soils in the building pad area may need to be GEO Group Northwest, Inc. • June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 6 compacted by vibratory roller, if they are not obviously dense and unyielding. The prepared subgrades should be observed by the project geotechnical engineer to verify their condition. Any soft spots or disturbed areas detected in the subgrade should be re- compacted or excavated " and replaced with compacted structural fill or crushed rock as directed by the geotechnical engineer. Structural Fill Structural fill consists of soil or aggregate free of deleterious debris and organic material which is capable of being compacted to meet the following compaction requirements. We recommend that the structural fill consist of a free - draining pit -run sand or gravel containing less than 5 percent passing the #200 sieve. Fill placed under the following structures shall be compacted to meet or exceed the noted percentage of maximum dry density in accordance with the modified density- moisture curve per ASTM -D- 1557 -91: Structure Percentage Max. Dry Density Building Foundations 95% Slab -on -grade concrete floors 95% Pavements (top 12- inches) 95% Pavements (below the top 12- inches) 90% Erosion Control Because the site soils consist of silty SAND and sandy SILT soils and because moderate to steep slopes are located at the site it is our opinion that there is a moderate erosion hazard at the project site. We recommend that a filter fabric fence be installed downhill of the proposed construction area to prevent sediment -laden water from flowing off -site. If moderate to steep slopes are disturbed as a result of construction we recommend that the disturbed slope areas be covered with plastic sheeting during construction. Permanent vegetation should be re- established and maintained following construction on all moderate to steep inclination native slopes at the project site. Jute netting can be placed on the disturbed slope areas to aid in the re- vegetating of disturbed slope areas. Steep cut slopes should be faced with rockery rocks in accordance with the Standard Rock Wall Construction Guidelines by the Association of Rockery Contractors. GEO Group. Northwest, Inc. Please respond to al questions. Use separate sheets as necessary. • Applicant Responses: Agency Comments Proposed measures to avoid or reduce shoreline and land use impacts are: 6. How would the proposal be likely to increase demands on transportation or public service and utilities? Proposed measures to reduce or respond to such demand(s) are: 7. Identify, if possible, whether the proposal may conflict with Local, State, or Federal laws or requirements for the protection of the environment. please respond to questions. Use separate sheets as nece ary. Applicant Responses: 3. How would the proposal be likely to deplete energy or natural resources? Proposed measures to protect or conserve energy and natural resources are: 4. How would the proposal be likely to use or affect environmentally sensitive areas or areas designated (or eligible or under study) for governmental protection; such as parks, wilderness, wild and scenic rivers, threatened or endangered species habitats, historic or cultural sites, wetlands, floodplains, or prime farmlands? Proposed measures to protect such resources or to avoid or reduce impacts are: 5. How would the proposal be likely to affect land and shoreline use, including whether it would allow or encourage land or shoreline uses incompatible with existing plans? Agefcy. Comments • Please respond to all questions. Use separate sheets as necessary. pplicant Responses: Agency Comments D. S>JPPLEMENTAL SHEET FOR NON - PROJECT PROPOSALS (do not use this sheet for project actions) Because these questions are very general, it may be helpful to read them in conjunction with the list of elements of the environment. When answering these questions, be aware of the extent the proposal, or the types of activities likely to result from the proposal, would affect the item at a greater intensity or at a faster rate than if the proposal were not implemented. Respond briefly and in general terms. 1. How would the proposals be likely to increase discharge to water; emissions to air; production, storage, or release of toxic or hazardous substances; or production of noise? Proposed measures to avoid or reduce such increases are: 2. How would the proposal be likely to affect plants, animals, fish, or marine life? Proposed measures to protector conserve plants, animals, fish, or marine life are: Please respond to all questions. Use separate sheets as necessary. Applicant Responses: 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. 7-7-‘4 4 - sE dif s*//rne4,7 £c — VAS- w -iZ 7Ze-e-PAlon) E -- Q 4I Fs T C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on em to make its decision. Signatur Date Submitted: - (/,c/Ly / ZD o 5— (NON- PROJECT PROPOSALS (E.G., SUBURBAN PLANS AND ZONING CODE TEXT CHANGES) MUST COMPLETE THE FOLLOWING PAGES). Agency Comments Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments f. .How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. p2 /i�irr.. V to /167 /Am i = Zo /9-67 g. Proposed measures to reduce or control transportation impacts, if any: 4.i041 o ,"7 / Gi9.701;t7o L 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. 4/0 b. Proposed measures to reduce or control direct impacts on public services, if any. A/4 16. Utilities a. Circle utilities currently available at the site: natural gas, ary seweeseptic system other: CMG•. T V Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 14. Transportation a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? c. How many parking spaces would the completed project have? How many would the project eliminate? 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). e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. • • Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. . 02 /74,4-76- : / , /D 7 /,gym Zo 'T g. Proposed measures to reduce or control transportation impacts, if any: 4.oe1G e7 17VVC9/497e,4130 4 -- 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. No b. Proposed measures -to reduce or control direct impacts on public services, if any. A-7/4 16. Utilities a. Circle utilities currently available at the site: natural gas, system other: G'G,E. T 1/ septic •. • Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 14. Transportation a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. "4V,E SoI/7H b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? No r ,k,voe7.0 fi i v E 4 Z'24 VE5eggAti, ' Si T' tee:Au riF c. How many parking spaces would the completed project have? How many would the project eliminate? 4- z PER-- 29ey 1 T 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). A/o -- /.die i ot€C.JA-r e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No • • Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Conunents b. Would the proposed project displace any existing recreational uses? If so, describe. iv c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: RE( 4t0477c 7 6C 'ie .099m z-e7 C2Ce... -uo"4 t) ? ( 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, generallyy describe. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. Nb ,. kivoc.),0 c. Proposed measures to reduce or control impacts, if any: iv/4 • • Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it • mainly occur? / /o -c. /7/0,77;f- /./f /517.Y 7 S .//?/ 2p.A/ b. Could light or glare from the finished project be a safety hazard or interfere with views? Nor eWPEC7...0 w,ZT/r 4/ 1v2 c. What existing off -site sources of light or glare may affect your proposal? d. Proposed measures to reduce or control light and glare impacts, if any: ..5rv,ge /,der c77-a42.& 12. Recreation a. What designed and informal recreational opportunities are in the immediate vicinity? 1p-*- id s Please respond to all questions. Use separate sheets as necessary. • • Applicant.Responses: b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low- income housing. c. Proposed measures to reduce or control housing impacts, if any: Aeaviz // .3 f mesa, 10. Aesthetics a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? 30' m/5.4 r b. What views in the immediate vicinity would be altered or obstructed? c. Proposed measures to reduce or control aesthetic impacts, if any: Agency Comments Please respond to all questions. Use separate sheets as necessary. Applicant Responses: DEVELOPMENT i. Approximately how many people would reside or work in the completed project? RECEIVED OCT+ 131005 coM ' Comments g Ors i'ffince -/�r �== fir' Approximately how many people would the completed project displace? k. Proposed measures to avoid or reduce displacement impacts, if any: 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: 'L2/A' .E/C/,'')? 1'.' 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low- income housing? Please respond to all questions. Use separate sheets as necessary. Applicant Responses: c. Describe any structures on the site. /t /o tAa ic OLA mouse y- . ��1Aza.4 T1'o 17 / /i9- :'/V /w/ Gc>/cLL d. Will any structures be demolished? If so, what? y — o / 2OJS' w *_ C a co c lc s gE19a /1.v) /e twuky envf' s/ a �r47ZO#c 4c2 N e. What is the current zoning classification of the site? f. What is the current comprehensive plan designation of the site? Zoe-0 j 77,9 c� If applicable, what is the current shoreline master program designation of the site? N /i9 h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. '1ES 7-9-€71A S!.oP2� Agency Comments • • Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments b. Noise 1. What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? 2. What types and levels of noise would be created by or associated with the project on a short-term or long -term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from .the site. Nofeim4G elD.oi72 /Jc,r'o,v /teo /sz —sh1vE?J- 7Zei2 3. Proposed measures to reduce or control noise impacts, if any: 424-0 \/ i/141 OA; RAW oS/jr9,v4 / o Gfe-)eo,e kteleS 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? ,e45 /.40 is n77//4 c. b. Has the site been used for agriculture? If so, describe. Akr CEyr. y Please respond to all questions. Use separate sheets as necessary. Applicant Responses: b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. 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: hicvatc'S -- /V./ St.1G A T1o/y Se'%oe °_ i ,01-47--- ,eto e (2o.i`oT) /Naal- AMT /o4 7. Environmental Health a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. yes — /( /O,efr - 4- ervet7 s,TTe1L G 7.-kz7n2 FC4 r / i0".774,/ /t/Ee) ADls?E5 1. Describe special emergency services that might be required. 2. Proposed measures to reduce or control environmental health hazards, if any: C—e-ip4s) er00-7,110 se,A.P-07/41.6eiv T f/e ,UGK+ 770AJ S -- . Agency Comments Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 5. Animals a. Circle any birds or animals which have been observed on or near the site or are known to be on or near the site: Birds: Hawk, heron, eagle, birdj other: Mammals Deer, bear, elk, beaver, other: Fish Bass, salmon, trout, herring, shellfish, other: Other Cr4T S — 00095 b. List any threatened or endangered species known to be on or near the site. NON / leA/at.dni c. Is the site part of a migration route? If so, explain. 0 d. Proposed measures to preserve or enhance wildlife, if any: /)7?9i7t7 719yr7 GILD,? 5 e74- nE. .":490.7 7W " /3443/7:47- /tica z' T/vn/ 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. g"L 'e 7-, e. Wg 7 — ,FGE,d Tie, c Gro®k/ev,' Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 4. Plants a. Check or circle types of vegetation found on the site: 1( Deciduous tree: alder, maple, aspen, other )( Evergreen tree: fir, cedar, pine, other X Shrubs X 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? Sonic DF.4/4' c u S/. /F-4, ;RAJ T,!"•�j�.s 50414e4.18S (j s hO #4s� -5Mper CroArsr 77oM c. List threatened or endangered species known to be on or near the site. /l /o/ / A- A/0404) "- d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: y Es. — ,e4 r Pp . e/ /1/4irat'3W -- A(4T 7ST,UC7 /) Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 2. Describe waste materials that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc). Describe the general 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: / e7N/E c. Water Runoff (including storm water): 1. Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow? Will this water flow into other waters? If so, describe. \a oTrG As /ce®/Y7 i° emoo nem, letsg i/.3Lam. tam0-4-777G- /*+C/SA ,E-/1' £ WA-Se9 <. esgeo 4)10.7 /sOt . — / y ou .r__& —,cto3 /A.27-0 C/ E s / of��.¢/•v�ay 2. Could waste materials enter ground or surface waters? If so, generally describe. /(/o — A/o T if_PP,&c TEA -r� d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: ffto n 0,5,1,7 G. .o � — ,°.49ee)h s S ,e,s- 0 Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 4. Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities, if known. fro 5. Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan. 4/d 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. ° Nd 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. • Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments c. Proposed 'measures to reduce or control emissions or other impacts to air, if any: l4 s -- �SA 1:2i�219ia°-h y 004257- -4c *cry Edu/P'2? J' 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. yes --- off S/77E- .SL 474 -ee. ,,e7teAin, j ?2,uiPS'rc "OgAVA2/45,0 Apr-N 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. '/ES < Pei9 I A> ,c' r S trr, C A694rN � y) 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. Nowa Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. g. 9/ /✓ Ve- 70f'77' 77 'A/ About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? 020 6o /�i4i� � — Z / i0n tcs 4 0(9-0 tx__ 2 = Gkoov D/etvcctdri y of ono = /?car,'✓' 4.b'Z r�r✓,v /ow .s— h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: %.S C-f /0:404 -4de 2. Air a. What types of emissions to the air would result from the proposal (for example, dust, automobile odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. .rte, r th/e/nA," nbNSTied c2A/— /4i/✓tv, , .�itie,49t9T ftiL17b/l S /('E /F....AC 2S-7J 1,04A415r b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. Aft A/15, E /��o ,„ Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Flat, rolling, hill mountainous, other: .542.1 . S Civf'Es 776 / ca b. What is the steepest slope on the site (approximate percent slope)? 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. . tr /4 d Z 2 ivee --r-v/ o iL 7 cryre 4o G,& /Tim .sao),I ; Ater-A5. Qo v et l /`sl�G /G /OT -Yy.F, A../LG.. eL4 / 1.E. 761. ,QT /0,14/ S Tim 43 /'�riQV /AA/6_ PRtm /440e01 1./90.4d d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. No/t//s. /t/0 7-2E/ e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Fv / s z PSr v+st. / 17 4' e : s,510,e' A44 7/ 21-9/ .P7 .raa Cy, Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 9. List any government approvals or permits that will be needed for your proposal. D/a' Rar-r-la S - 77)46,) / 4,,4 44/ /06 P, a/ r_s 5,90e f'c.oar soot Ge.aP /f /GG 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. 40 S77/479 Zo e.r" Ooc2 7 ,,E ,IO U /ate /AvT v 7G.2n 50 rsm ._C?fl,057-ezi s /A) - ...fin X177 llortdps On, P19? -E -C-- /9 j 3 0/0 MEG.) .o7/T- 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, the tax lot number, and section, township, and range. 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. /3(/'/z 1 ''Z" Ave 5.0 Tc� 9360600291 12. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? Afa7' ,modGOA, STATE ENVIRONMENTAL CHECKLIST Please respond to all questions. Use separate sheets as necessary. An electronic version of this form is also available from the Department of Community Development. Applicant Responses: A. BACKGROUND 1. Name of proposed project, if applicable: Agency Comments 2. Name of Applicant: /'2Jzg/,e —5/A/9/t/ /f,;4//t, 3. Date checklist prepared:„.„ 4. Agenc . esting checklist: 5. Proposed timing or schedule (including phasing, if applicable): 6. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. . r AT 2 ,.r 7. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. T,AbfiPRni -I e s ite%) c ( 0 I / / 4Lis List 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. /,/n,E. ,4fI✓0N .5'#0,e r /°4-,47-/ 2 S /'Q f 4 /40-mi f Spa x. .e r„) /T , A,tvez -) / 4/7% 6'T7 i. City of 1 ukz LSA Screening Checklist . appropriate response. NO - Continue to Question 2 -0 (Page 2) Continue to Question 1 -4 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. NO - Continue to Question 2 -0 (Page 2) - 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 watercourse or the Green/Duwamish or Black Rivers? Please circle appropriate response. NO - Continue to Question 3 -0 (Page 2) ontinue 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. NO�- Continue to Question 2 -3 S 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 ontinue 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) cYEontinue 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. • Part A (continued) City of l ukuntal Screening Checklist 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. ontinue 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 City of '1 ukwz 5A Screening Checklist • 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. Continue to Question 3 -6 YES - Continue to Question 3 -6 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. ontinue 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 stryctures, or similar structures. Please circle appropriate response. Continue to Question 4 -0 (Page 2) S - Continue to Question 4 -0 (Page 2) • NO •ontinue to Question 3 -0 (Page 2) YES - Continue to Question 3 -0 (Page 2) City of l ukunlaiv 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 bo 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 shou a answer Yes to this question. Please circle appropriate response. ontinue to Question 3 -3 YES - Continue to Question 3 -3 3 -3 Will the project result in the construction of anew 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 - ' ontinue 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 - ' ontinue 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 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 O-- 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 • 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 ontinue to Question 4 -0 YES - Continue to Question 3 -1 (Page 5) 4 -0 ,?Continue 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 during construction. Please circle appropriate response. 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. O - ontinue to Question 6 -0 YES - Continue to Question 6 -0 City of Tukwila", Screening Checklist City of Tukwila Endangered Species Act Screening Checklist Date: Applicant Name: � ff, L .2� rS '..'r(1,7-- ?..5 e45/4 aez Street Address: 80.2. ¢S 57 NEE APT f t.2e4 City, State, Zip: O4i1KN/ £'-)4 7Sao2 Telephone: 2 U�o .23 S- 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 ii City of Tukwila Steven M. Mullet, Mayor Department of Community Development Steve Lancaster, Director NOTICE OF COMPLETE APPLICATION October 4, 2005 Mr. Robert Parnell 4422 187t PL SE Issaquah, WA 98027 Re: Notice of complete application 13601 % 42 "d Ave South L05 -058 E05 -014 Dear Mr. Parnell: The Department of Community Development received your short plat application and SEPA application on September 23, 2005 for a short plat at 13601 Y2 42nd Avenue South. Based on a review of your application for submittal requirements for Preliminary Short Plat, your application is deemed complete as of October 4, 2005. A notice of land use application will be distributed within 14 days of this date. 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. If you need another set of those instructions, you may obtain them at the Department of Community Development (DCD). Also, you must obtain a laminated copy of the Notice of Application to post on the board. This notice is also available at DCD. After installing the sign with the laminated notice, you need to return the signed Affidavit of Posting to our office. The application and associated materials have been routed to other City departments for review. Staff will be in contact with you soon to discuss the project. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: 206 - 431 -3670 • Fax: 206 - 431 -3665 • • It appears that a tree - clearing permit will be required for the removal of any trees on the property. Attached you will find a tree clearing permit application form. This determination of complete application does not preclude the ability of the City to require that you submit additional plans or information, if such information is necessary to ensure the project meets the substantive requirements of the City or to complete the review process. If you have any questions, you can contact me at (206) 431 -3684 or by email at bmiles @ci.tukwila.wa.us. Sincerely, Jra on J. es Assistant Planner cc. Files (L05 -058 and E05 -014) June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 7 Excavations and Slopes Under no circumstances should temporary excavation slopes be greater than the limits specified in local, state and federal government safety regulations. Temporary cuts greater than four feet in height and located entirely above the groundwater table should be sloped at an inclination no steeper than 1 H:1 V (Horizontal: Vertical). Where adequate space for temporary cuts is not available, shoring may be required to provide lateral support during excavation. Permanent cut and fill slopes at the site should be inclined no steeper than 2H:1 V. It should be understood that cut slopes for excavations that reach the groundwater table may not stand at 1H:1V and will need to be cut back to gentler inclinations or be shored. Surface runoff should not be allowed to flow uncontrolled over the top of slopes into the excavated area. We recommend that a GEO Group Northwest, Inc., representative be on site during excavation of cut slopes to verify anticipated geologic conditions and to evaluate slope stability, particularly where groundwater seepage or loose soil conditions are encountered. Spread Footing Foundations Individual spread footings may be used for supporting columns and strip footings for bearing walls. The building footings may be placed on top of the dense native sand soils or on top of structural fill placed on top of the dense native site soils. Based upon our investigation we anticipate that dense native sand soils are located at approximately 1 to 3.5 feet below ground surface. The actual depth to dense soils at the foundation locations should be verified by GEO Group Northwest, Inc. at the time of construction. Some over - excavation may be necessary to remove overlying loose to medium dense soils from the footing subgrade areas. Structural fill may be placed in the over - excavated footing subgrade areas or deeper footings may be poured directly on the dense native soils. Following the footing and stem -wall construction, structural fill may be placed and compacted in the slab -on -grade area up to the proposed finish slab subgrade elevation. _ Our recommended minimum design criteria for foundations bearing on the dense site soils or compacted structural fill are as follows: GEO Group Northwest, Inc. direct surface water away from the building. The footing drain should consist of a four (4) inch GEO Group Northwest, Inc. June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 9 minimum diameter, perforated or slotted, rigid drain pipe laid at or near the bottom of the footings with a gradient sufficient to generate flow, as schematically illustrated on Plate 6 - Typical Footing Drain Detail. The drain line should be bedded on, surrounded by, and covered with a free- draining rock, pea gravel, or other free - draining granular material. The drain rock and drain line should be completely surrounded by a geotextile filter fabric, Mirafi 140N or equivalent. The footing drain line should be tightlined to the stormwater system. Downspout drain pipes should be separately tightlined to discharge into the stormwater system. Slab -On -Grade Floors Slab -on -grade floors may be constructed on the medium dense to dense site soils or on compacted structural fill that extends down to the medium dense site soils provided that the subgrade is firm and unyielding at the time of construction. The condition of slab -on -grade subgrades should be approved by a GEO Group Northwest, Inc., representative prior to concrete slab pour. To avoid moisture build -up on the subgrade, slab -on -grade floors should be placed on a 6 -inch thick capillary break, crushed rock base. The crushed rock base should consist of an angular crushed rock containing no more than five (5) percent finer than the No. 4 sieve and a diameter ranging from 5/8 inch to 2- inches. Typically a vapor barrier, such as a 6 -mil plastic membrane, is placed over the capillary break beneath the slab to reduce water vapor transmission through the slab. Two to four inches of sand may be placed over the barrier membrane for protection during construction. Conventional Concrete Retaining Walls Permanent retaining walls restrained horizontally on top (such as basement walls) are considered unyielding and should be designed for a lateral soil pressure under the at -rest condition; while conventional reinforced concrete walls free to rotate on top should be designed for an active lateral soil pressure. We have not reviewed construction drawings for the proposed development, but we have prepared the following standard recommendations regarding conventional retaining walls with heights of up to 10 feet, for your use. GEO Group Northwest, Inc. • + June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 10 Active Earth Pressure Conventional reinforced concrete walls that are designed to yield an amount equal to 0.002 times the wall height, should be designed to resist the lateral earth pressure imposed by an equivalent fluid with a unit weight of 35 pcf for level backfill behind yielding retaining walls; At -Rest Earth Pressure Walls supported horizontally by floor slabs are considered unyielding and should be designed for lateral soil pressure under the at -rest condition. The design lateral soil pressure should have an equivalent fluid pressure of 45 pcf for level ground behind permanent unyielding retaining walls; Passive Earth Pressure 350 pcf equivalent fluid weight for structural fill and dense native soil Base Coefficient of Friction 0.35 for structural fill and dense native soil To prevent buildup of hydrostatic pressure behind permanent concrete basement or conventional retaining walls, we recommend that a vertical drain mat, such as Miradrain 6000 or equivalent, be used to facilitate drainage behind the wall. The drain mat core should be placed against the wall with the filter fabric side facing the backfill. The drain mat should extend from near the finished surface grade down to the footing drain. Alternatively, in place of vertical drain mat, a clean, granular, free draining structural backfill material can be placed within a horizontal distance of 18 inches of the wall. The free - draining granular material should also extend downward to the footing drain. The top 12 inches of the fill behind the wall should consist of compacted and relatively impermeable soil. This cap material can be separated from the underlying more granular drainage material by a geotextile fabric. Alternatively, the surface can be sealed with asphalt or concrete paving. The surface should be sloped to drain away from the building wall. A schematic illustration of the wall and drainage system is presented in Plate 7 - Retaining Wall Backfill and Drainage. GEO Group Northwest, Inc. June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 11 Backfill material behind permanent concrete retaining walls should be compacted to at least 90 percent of the maximum dry density determined by ASTM D 1557 (Modified Proctor Method) as specified in the Structural Fill section of this report. The top 12 inches should be compacted to at least 95 percent of the maximum dry density. The backfill in areas adjacent to concrete retaining walls should be compacted with hand held equipment or a hoe -pack. Heavy compacting machines should not be allowed within a horizontal distance to the wall equivalent to one half the wall height, unless the walls are designed with the added surcharge. Pavement Section The adequacy of site pavements is directly related to the condition of the underlying subgrade soils. If the subgrade is loose or soft, settlement or movement of the subgrade will be reflected up through the pavement. In order to avoid poor pavement performance after construction, we recommend that the initial subgrade surface in pavement areas be prepared by 1) excavating and removing any loose soils, organics, or fills. The prepared soil subgrade can then be overlain with structural fill material or crushed rock to the project design grades. Structural fill material should conform to the recommendations presented in this report. In order to achieve the required compaction of the entirety of the fill material for the driveway, it may be necessary to build the fill section beyond the edges of the driveway area and cut the compacted fill back to its final extent. Permanent fill slopes should be not be steeper than 2H:1 V. We recommend that the pavement section for the driveway consist of at least 2 inches of asphalt over at least 6 inches of crushed rock base. We recommend that the geotechnical engineer observe a proof rolling of the final subgrade before the placement of the pavement section to verify that the final subgrade is firm and unyielding. The proof rolling should be performed using a fully loaded dump truck or other similarly heavy wheel -load equipment. Areas of the subgrade that are observed to yield should be repaired as described above in this section of this report. LIMITATIONS AND ADDITIONAL SERVICES This report has been prepared for the specific application to this site for the exclusive use of Mr. Kulbir Singh Rehal and his authorized representatives. Any use of this report by other parties is GEO Group Northwest, Inc. June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 12 solely at that party's own risk. We recommend that this report be included in its entirety in the project contract documents for reference during construction. Our findings and recommendations stated herein are based on field observations, our experience and judgement. The recommendations are our professional opinion derived in a manner consistent with the level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area and within the project budget and schedule constraints. No warranty is expressed or implied. In the event that unanticipated soil conditions are encountered during site development, GEO Group Northwest, Inc., should be notified and the above recommendations should be re- evaluated. We recommend that GEO Group Northwest, Inc., be retained to verify that the new house foundations are bearing on dense native soils and that the slab -on -grade floor subgrades are unyielding at the time of construction. If structural fills are placed at the site, we recommend that GEO Group Northwest, Inc. be retained to verify that fills are compacted to meet the minimum structural fill requirements. If you have any questions, or if we may be of further service, please do not hesitate to contact us. Sincerely, GEO GROUP NORTHWEST, INC. EXPIRES: 2/19/ 06. Adam Gaston Staff Engineer William Chang, P.E. Principal GEO Group Northwest, Inc. June 22, 2005 Mr. Kulbir Singh Rehal G- 1948 -1 Page 13 Attachments: Plate 1 - Vicinity Map Plate 2 - Site Map Plate 2A - Steep Slope Areas Plate 3 - USCS Legend Plates 4 and 5 - Test Pit Logs Plate 6 - Typical Footing Drain Detail Plate 7 - Retaining Wall Backfill and Drainage GEO Group Northwest, Inc. PROJECT SITE Group Northwest, Inc. Geotechnlcal Engineers, Geologists, & Environrrental Scientists VICINITY MAP PROPOSED SINGLE FAMILY RESIDENCE 13601 -1/2 42ND AVENUE SOUTH TUKWILA, WASHINGTON SCALE: NONE DATE: 12/20/04 MADE: AG CHKD: WC • JOB NO: G -1948 PLATE 1 a alio TP -1 LEGEND EXPLORATION TEST PIT (APPROXIMATE LOCATION) N8976'27 E 904.34' 4/. /y / "' /�- 348 49/ // /ice/ // 1' t^)/ /// / 1 11 1 III / 1 I 1 111 / / 1 1• / / 11 / / 1 / 1 ry 1 / 1 / 1 3� 1111 11 1 FOUND 1 2" REBAR & CAP�!13731 "� 1 0.19 N. & 1.02' E OF PROP. COR. 1 RO� �i 1 1 1 247 AaU 71 /0532 I 1 fig? 1 33032832 318 20 632432_320.- 332-----_._ 334 - - `�\ N. - - - 2 2N 3336_ -���� 342 -40 346 Zt.� ' \ \\ ..,:,......i. `4 ..,...-,v_..k. T fn 3 - \ \.5\' N's' �� 30.49'_\\ r." \ . "N. sN \ hr'Pcy`/ �`��� N 9 I BENCHMARK -TOP CENTER BOLT ON F.H. EL= 336.58 U.S. FEE/ (ASSUMED) ----- lE 12" RCP = 331.45 NEW WATER METERC3% LOT-1 a. S89 52'24 "E 90.00' F 8- 3 5 \ TL /2 \ - _ - - 35221,161± 0 SQ 71 FT. LOT 1 \ - - _3 11,450E SQ. �� -- 356J - - _FT._ _ TP -3 3360 �- /%% \364- — / % 34338 4644 / / "13731 0.1E & 1.02 E. 55a OF PROP. C' // 4160 r,..,---- 16 / / / / / \ 1 / ( \` / , LOT -2 6, $' . 9, 711 f SQ. FT. ^, / / - _ _ - -_ ; 366 368 372 0, E3 N78 7%y 5B 380- /' 382/ » 384. i . - 386- / 1 \ // / 1-•. / 9 52'24 "W 90.00' - �,---' // / /// /// /// / // p�/ 1L/ // / /// //% / // / // / , / / / 4/ // // t /�,yi4P�p/ / V/d/ �14L /1c),/ 1L /0575 S .O6' _e INSTALL NEW 6° PVC SANITARY SEWER TO I - SERVE THE THREE LOTS/RESIDENCES. REMOVE OR ABANDON THE EXISTING 4 °. 7L /0275 0 30, 60 SCALE: 1 INCH = 30 FEET NO3'50'15'W 1234.78' (MEAS.) 1235.40' (PLAT) 37771 AVE. 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Geotechnicai Engineers, Geologists, & Environmental Scientists STEEP SLOPE AREAS PROPOSED SHORT PLAT 13601 -1/2 42ND AVENUE SOUTH TUKWILA, WASHINGTON SCALE: 1" = 30' DRAWN: KJ CHECKED: WC DATE: 5/26/05 PROJECT NO.: G- 1948 -1 PLATE 2A • LEGEND OF SOIL CLASSIFICATION AND PENTRATION TEST UNIFIED SOIL CLASSIFICATION SYSTEM (USCS) MAJOR DIVISION GROUP SYMBOL TYPICAL DESCRIPTION LABORATORY CLASSIFICATION CRITERIA . COARSE- GRAINED SOILS More Than Half by Weight Larger Than No. 200 Sieve GRAVELS (More Than Half Coarse Grains Larger Than No. 4 Sieve) CLEAN GRAVELS (little or no fines) GW WELL GRADED GRAVELS, GRAVEL -SAND MIXTURE, LITTLE OR NO FINES DETERMINE PERCENTAGES OF GRAVEL AND SAND FROM GRAIN SIZE DISTRIBUTION Cu = (D60 / D10) greater than 4 Cc = (D302 ) / (D10 • D60) between 1 and 3 GP POORLY GRADED GRAVELS, AND GRAVEL -SAND MIXTURES LITTLE OR NO FINES NOT MEETING ABOVE REQUIREMENTS DIRTY GRAVELS (with some lines) GM SILTY GRAVELS, GRAVEL - SAND -SILT MIXTURES CURVE COARSE GRAINED SOILS ARE CLASSIFIED AS FOLLOWS: < 5% Fine Grained: GW, GP, SW, SP > 12% Fine Grained: GM, GC, SM, SC 5 to 12% Fine Grained: use dual symbols CONTENT ATTERBERG LIMITS BELOW "A" LINE. or P.I. LESS THAN 4 GC CLAYEY GRAVELS, GRAVEL- SAND -CLAY MIXTURES OF FINES EXCEEDS 12% ATTERBERG LIMITS ABOVE "A" LINE. or P.I. MORE THAN 7 SANDS (More Than Half Coarse Grains Smaller Than No. 4 Sieve) CLEAN SANDS (little or no fines) SW WELL GRADED SANDS, GRAVELLY SANDS, LIITLE OR NO FINES Cu = (D60 / D10) greater than 6 Cc = (D302) / (D10' D60) between 1 and 3 POORLY GRADED SANDS, GRAVELLY SANDS, LITTLE OR NO FINES NOT MEETING ABOVE REQUIREMENTS DIRTY SANDS (with some fines) SM SILTY SANDS, SAND -SILT MIXTURES CONTENT OF FINES EXCEEDS 12% ATTERBERG LIMITS BELOW "A" LINE with P.I. LESS THAN 4 SC CLAYEY SANDS, SAND -CLAY MIXTURES ATTERBERG LIMITS ABOVE "A" LINE with P.I. MORE THAN 7 FINE-GRAINED SOILS More Than Half by Weight Smaller Than No. 200 Sieve SILTS (Below A•LIne on Plasticity Chart, Negligible Organic) Liquid Limit < 50% ML INORGANIC SILTS, ROCK FLOUR, SANDY SILTS OF SLIGHT PLASTICITY 60 .,. 50 _ o XX W 40 Z 30 U 20 g Cl- t1 10 a 0 PLASTICITY CHART FOR SOIL PASSING • NO. 40 SIEVE Liquid Limit > 50% MH INORGANIC SILTS, MICACEOUS OR DIATOMACEOUS, FINE SANDY OR SILTY SOIL A -Line , CLAYS (Above A -Line on Plactidty Chart, Negligible Organic) Li uid Limit 30% CL INORGANIC CLAYS OF LOW PLASTICITY, GRAVELLY, SANDY, OR SILTY CLAYS, CLEAN CLAYS CH or OH ,,,, Liquid Limit > 50% CH INORGANIC CLAYS OF HIGH PLASTICITY, FAT CLAYS CL or OL , ORGANIC SILTS +� CLAYS (Below A -Line on Plactidty Chart) Liquid Limit < 50% OL ORGANIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY �MI OL .r ML MH or OH AIM Liquid Limit >50% OH ORGANIC CLAYS OF HIGH PLASTICITY 10 20 30 40 -0 60 70 80 90 10 0 11 0 HIGHLY ORGANIC SOILS pt PEAT AND OTHER HIGHLY ORGANIC SOILS LIQUID LIMIT ( %) SOIL PARTICLE SIZE GENERAL GUIDANCE OF SOIL ENGINEERING PROPERTIES FROM STANDARD PENETRATION TEST (SPT) FRACTION U.S. STANDARD SIEVE Passing Retained SANDY SOILS SILTY & CLAYEY SOILS Sieve Size (mm) Steve S12e (mm) Blow Counts N Relative Density % Friction Angle m, degree Description Blow Counts N Unconfined Strength qu, tsf Description SILT / CLAY #200 0.075 SAND FINE MEDIUM COARSE #40 #10 #4 0.425 2 4.75 #200 #40 #10 0.075 0.425 2 0 - 4 4 - 10 10 - 30 30 - 50 > 50 0 -15 15 - 35 35 - 65 65.85 85 -100 26 - 30 28 - 35 35 - 42 38 - 46 Very Loose Loose Medium Dense Dense Very Dense < 2 2 - 4 4 - 8 8 - 15 15 - 30 > 30 < 0.25 0.25.0.50 0.50 - 1.00 1.00 - 2.00 2.00 - 4.00 > 4.00 Very soft Soft Medium Stiff Stiff Very Stiff Hard GRAVEL, 19 78 44 4.75 19 FINE COARSE r PLATE 3 COBBLES 76 m to 203 mm m s G EO Group Northwest, Inc. BOULDERS > 203 mm .� Geotechnical Engineers, Geologists, & Environmental Scientists 13240 NE 20th Street, Suite 12 Bellevue, WA 98005 Phone (425) 649-8757 Fax (425) 649.8756 ROCK FRAGMENTS > 76 mm ROCK ' >0.76 cubic meter In volume LOGGED BY AG TEST PIT NO. TP -1 TEST PIT DATE: 12/17/04 Water 16 22.6 19.4 23 26.2 OTHER TESTS/ COMMENTS FILL NATIVE LOGGED BY AG TEST PIT NO. TP -2 TEST PIT DATE: 12/17/04 DEPTH ft. USCS DEPTH ft. SOIL DESCRIPTION USCS SOIL DESCRIPTION ____ SAMPLE No. – – • – 5 — - -- - - - -- SM - ML ML SM Dark brown gravelly silty SAND with some quarry spall rock, moist, loose Tan fine sandy SILT with some fine gravel, moist, loose - Brown gravelly sandy SILT, moist to wet, dense Orange gravelly silty SAND, moist, dense S 1 ♦ S2 1 S3 S4 1 S5 – – 10 15 _– Total depth of test pit = 6 feet No groundwater seepage Water 16 22.6 19.4 23 26.2 OTHER TESTS/ COMMENTS FILL NATIVE LOGGED BY AG TEST PIT NO. TP -2 TEST PIT DATE: 12/17/04 DEPTH ft. USCS SOIL DESCRIPTION SAMPLE No. ____ SM Brown fine silty SAND, moist to wet, loose to medium dense 1 S1 – SM Tan fine silty SAND, moist, dense _– 1 S2 5 — 1 S3 SM Gray very fine silty SAND, moist, dense 1 S4 SM Blue -gray very fine silty SAND, moist, dense 10 1 S5 — Total depth of test pit = 9 feet – No groundwater seepage Quarry spall rock and crushed rock were encountered just north of the – test pit. The rock fills appear, to be fill behind a cement block wall. 15 Water 22.1 25.6 30.6 29 26.5 OTHER TESTS/ COMMENTS NATIVE GEO Group Northwest, Inc. Geotechnical Engineers, Geologists, & Environmental Scientists TEST PIT LOGS PROPOSED SINGLE FAMILY RESIDENCE 13601 -1/2 42ND AVENUE SOUTH TUKWILLA, WASHINGTON JOB NO. G-1948 DATE 12/17/04 I PLATE 4 DEPTH ft. 5 10 15 LOGGED BY US CS ML SM SM AG TEST PIT NO. TP -3 TEST PIT DATE: 12/17/04 SOIL DESCRIPTION Dark brown and brown gravelly sandy SILT, moist, loose Tan fine silty SAND, moist, loose Medium dense at 3 feet bgs Tan fine silty SAND, moist, dense Total depth of test pit = 5 feet No groundwater seepage SAMPLE No. S1 11 S2 S3 ♦ S4 Water 24 25.8 21.6 18 OTHER TESTS/ COMMENTS FILL NATIVE DEPTH ft. LOGGED BY USCS TEST PIT NO. TEST PIT DATE: SOIL DESCRIPTION SAMPLE No. Water 5 10 15 OTHER TESTS/ COMMENTS Group Northwest, Inc. Geotechnlcal Engineers, Geologists, & Environmental Scientists TEST PIT LOGS PROPOSED SINGLE FAMILY RESIDENCE 13601 -1/2 42ND AVENUE SOUTH TUKWILLA, WASHINGTON JOB NO. G-1948 I DATE 12/17/04 I PLATE 5 i BACKFILL WITH COMPACTED NATIVE SOIL GEOTEXTILE FILTER FABRIC, MIRAFI 140N OR EQUIVALENT FREE DRAINING BACKFILL CONSISTING OF WASHED ROUND ROCK OR CRUSHED ROCK MINIMUM 4 INCH DIAMETER PERFORATED PVC PIPE LEVEL OR WITH POSITIVE GRADIENT TO DISCHARGE NOT TO SCALE NOTES: 1.) Do not replace rigid'PVC pipe with flexible corrugated plastic pipe. 2.) Perforated or slotted PVC pipe should be tight jointed and laid with perforations or slots down, with positive gradient to discharge. 3.) Do not connect roof downspout drains into the footing drain lines. 111141101111 Group Northwest, Inc. Geotechnical Engineers, Geologists, & Environmental Scientists SCALE NONE I DATE .. 1 MADE AG TYPICAL FOOTING DRAIN DETAIL PROPOSED SINGLE FAMILY RESIDENCE 13601 -1/2 42ND AVENUE SOUTH TUKWILA, WASHINGTON CHKD WC JOB NO. G -1948 1 PLATE 6 Vertical Drain Mat (Miradrain 6000 or equivalent) 4 or 6 inch diameter slotted or perforated PVC pipe NOT TO SCALE NOTES: 1.) Do not replace rigid PVC pipe with flexible corrugated plastic pipe. 2.) Perforated or slotted PVC pipe should be tight jointed and laid with perforations or slots down, with positive gradient to discharge. 3.) Do not connect roof downspout drains into the footing drain lines. 4.) Backfill should be compacted to 90% of maximum dry density based on Modified Proctor. The top one foot should be compacted to 95% of maximum dry density if backfill is to support sidewalks, driveway, etc. Group Northwest, Inc. Geotechnical Engineers; Geologists, & Environmental Scientists SCALE: NONE DATE: 6/20/05 RETAINING WALL BACKFILL AND DRAINAGE PROPOSED 2 -LOT SHORT PLAT 13601 -1/2 42ND AVENUE SOUTH TUKWILA, WASHINGTON MADE: JOB NO:. G- 1948 -1