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HomeMy WebLinkAboutSEPA E98-0009 - FOSTER HEIGHTS - 16 LOT SUBDIVISIONFOSTER HEIGHTS SUBDIVIDE FOUR EXISTING LOTS INTO SIXTEEN LOTS 51 AVE S. & S. 146THST. E98-0009 • • CITY OF TUKWILA . DETERMINATION OF NONSIGNIFICANCE (DNS) DESCRIPTION OF PROPOSAL: SUBDIVIDE FOUR EXISTING LOTS INTO SIXTEEN LOTS. PROPONENT: LOCATION OF PROPOSAL. INCLUDING STREET -ADDRESS. IF ANY: ADDRESS: PARCEL NO: 004000-0539, SEC/TWN/RNG: 51 `:AV S & 5 ` 146 LEAD AGENCY: CITYOF TUK:WILA FILE NO: E9B-0009 The City has' determined.' that the'. gr000sal does not have a o-robable s i an i f i cant adverse impact on the environment. An env fronmenta l impact statement (EI'?.) is not 'required under RCW 43,21c 0 0(2)(c). This decision was made atter review,.of a completed environmental checklist and other information .on' t i le with the lead"'aaencv. �This information is available to the public -on request. ***********k****k*"*************k•k**;k*,*********.*�k****k*******"**********kk*k* This determination d',` tion is final ansianed this ZIS day of �ul' Steve Lancaster.., Responsible Official City of Tukwila. (206) 431-3670 6300 Southcenter Boulevard Tukwila. WA.: 9818L Copies of the procedures for SEPA appeals Department of Community Development.. City of .Tukwila NOTICE OF PUBLIC HEARING NOTICE IS HEREBY GIVEN THAT THE TUKWILA CITY COUNCIL WILL HOLD A PUBLIC HEARING ON TUESDAY, SEPTEMBER 8, 1998, BEGINNING AT 7:00 PM IN THE COUNCIL CHAMBERS AT TUKWILA CITY HALL, 6200 SOUTHCENTER BLVD., TUKWILA, WASHINGTON, TO CONSIDER THE FOLLOWING: CITY COUNCIL APPROVAL OF FOSTER HEIGHTS SUBDIVISION, A PRELIMINARY PLAT SUBDIVIDING FOUR PARCELS, TOTALING 3.14 ACRES, INTO 16 SINGLE-FAMILY LOTS, INCLUDING STREETS, SIDEWALKS, UTILITIES AND PEDESTRIAN PATH IN THE LOW DENSITY RESIDENTIAL DISTRICT, 6,500 -SQUARE -FOOT MINIMUM LOT SIZE. THE REFERENCE FILE NUMBERS ARE L98-0019 AND E98-0009. THE PROPOSED SUBDIVISION IS LOCATED ON SOUTH 146TH STREET AND 51ST AVENUE SOUTH. THE PUBLIC HEARING IS AN OPEN RECORD HEARING AND ALL INTERESTED PERSONS ARE INVITED TO BE PRESENT TO VOICE- APPROVAL, DISAPPROVAL, OR OPINIONS ON THIS ISSUE. FOR THOSE UNABLE TO ATTEND THE MEETING IN PERSON, YOU MAY SUBMIT WRITTEN TESTIMONY TO THE CITY CLERK'S OFFICE UNTIL 5 PM ON TUESDAY, SEPTEMBER 8,1998. THE CITY OF TUKWILA STRIVES TO ACCOMMODATE PEOPLE WITH DISABILITIES. PLEASE CONTACT THE CITY CLERK'S OFFICE BY NOON ON TUESDAY IF WE CAN BE OF ASSISTANCE (206-433-1800 OR TDD 1-800-833-6388). DATED THIS (C). DAY OF(�t�a GC4. ,1998. CITY OF TUKWILA E E. CANTU, CITY CLERK DATE OF PUBLICATION: SEATTLE TIMES, FRIDAY, AUGUST 21, 1998 CITY OF TUKWILA DEPARTMENT OF COMMUNITY DEVELOPMENT 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 AFF1llAVIT OF I\STALLATIO\ AND POST OF PUBLIC NFORVIATIO\ SIGNS) State of Washington County of King City of Tukwila G I Cato LA) Mb (Print Name) 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 iS — `I —°l ' the Public Notice Board(s) in accordance with Section 18.104.110 and other applicable guidelines were posted on the property located at S akt,k SD'= 5,14,4--C so as to be clearly seen from each right -of -way providing primary vehicular access to the property for application file number 1 R - 000q Affiant (Applisant..Signafore) G(/).au 004444,-- SUBSCRIBED AND SWORN to before me this day of , 19 NOTARY PUBLIC in and for the State of Washington residing at My commission expires on AFFIDAVIT I , W 6i1 4-Zz,4-nJ/ O Notice of Public Hearing 0 Notice of Public Meeting EBoard of Adjustment Agenda Packet Board of Appeals Agenda Packet []Planning Commission Agenda Packet 0 Short Subdivision Agenda Packet Notice of Application for Shoreline Management Permit []Shoreline Management Permit OF DISTRIBUTION hereby declare that: ❑ Determination of Non- significance Mitigated Determination of Nonsignificance Determination of Significance and Scoping Notice ONotice of Action I] Official Notice Other ❑ Other was mailed to each of the following addresses on Name of Project`JUJ*r csz. Signatur File Number g 6667 7 -00 -IK. VICINITY MAP N TS MEMORANDUM July 24, 1998 To: Steve Lancaster, irector and SEPA Responsible Official Fm: Carol Lu , Associate Planner Re: SEPA: Foster Heights Subdivision (File No. E98-0009) Project Description: Subdivide an approximately 3.14 acre group of parcels into 16 single family residential lots . The area is located west of 51st Avenue South, on South 146th Street. Proponent: Richard Schroeder, Happy Valley Land Company Location: 51st Avenue South and South 146th Street Date checklist prepared: March, 1998 Lead Agency: City of Tukwila, Department of Community Development Challenges to Document: None Other Agencies of Jurisdiction: None Recommendation: Determination of Non -Significance (DNS) File E98-0019 • • Foster Heights Subdivision SEPA Staff Report Documents submitted with SEPA Checklist: 1. Technical Information Report, 2/27/98 prepared by Baima & Holmberg 2. Geotechnical Evaluation, 2/10/98, prepared by Geospectrum Consultants, Inc. Comments to SEPA Checklist: Page 1, #6: Checklist estimates that construction will occur in Summer, 1999. Page 2. #10: The following permits and governmental approvals will be needed: demolition permit; land alteration/grading Summary of Primary Impacts: Earth The site is hilly and slopes down to the east, with the slopes ranging from 5% - 32%. The steepest slopes on the site exist on the two lots that will adjoin 51st Avenue South. These slopes are approximately 32%. The checklist indicates that the there are no surface indications or history of unstable soils in the immediate vicinity. The geotechnical investigation observed surface soils that were generally very moist, with some areas that were especially wet or had surface drainage or seeps. The geotechnical report notes that onsite soils are currently too wet to obtain adequate compaction and that onsite soils will be very difficult to compact unless they are dried out sufficiently. The report recommends that site grading be scheduled during warm, low humidity weather to reduce the potential problems associated with wet soils and ground water seepage. In addition, unless the onsite soils can be dried to near optimum moisture content, site grading will require the use of imported granular fill soils for proper compaction. The onsite soils are not considered suitable for backfill within the drainage zone of basement walls or other retaining walls. Approximately 1,000 cubic yards of onsitte grading will occur. Some soils will be imported for the road base. Approximately thirty-five percent of the site will be covered by impervious surfaces. An erosion control plan will be prepared to minimize erosion during construction. The geotechnical report was prepared prior to the revision of the subdivision layout; the report will need to be updated to reflect the new street layout and lotting pattern prior to the issuance of any land altering permits for the site. c:\carol\theights\sepa-rpt.doc 2 File E98-0019 Foster Heights Subdivision SEPA Staff Report • • Air Dust and vehicular emission from construction is expected. Construction equipment will meet current emission standards; dust control will be provided during construction. Water The site is not adjacent to a body of water and the project does not plan to withdraw any ground water from the ground. The geotechnical report notes "...that the surface soils were generally very moist over most of the site and some areas were especially wet or had surface drainage or seeps..." The report goes on to note that "(t)he risk of instability damage on lots 5, 15, and 16 is considered moderate to high due to the wet conditions, the steeper slopes and existing fill...Risk of slope failure can be reduced by incorporating proper engineering design and providing and maintaining control of surface runoff and subsurface drainage." The Technical Information Report, prepared by Baima & Holmberg, Inc. indicates that runoff from the site sheet flows east down a slope where it drains into catch basins located along the west side of 51st Avenue South. The runoff flows south approximately 800 feet in a 12 -inch storm system located along the west side of 51st Avenue South. The system then turns east approximately 50 feet crossing 51st Avenue South and discharging into a drainage ditch. Storm drainage from the development will be discharged into an onsite retention/detention facility in the eastern portion of the site. Storm detention and water quality control will be provided per the City of Tukwila's storm water standards and the King County Storm Water Design Manual. Plants The checklist indicates that the site contains deciduous trees. All vegetation will be removed in the roadway areas. Those areas of the site that are in the sensitive area are subject to the tree regulations of the zoning code. Street trees will be planted along the new access streets serving the subdivision. Animals The checklist notes that songbirds have been observed on or near the site. There are no threatened or endangered species known to be on or near the site. c:\carol\theights\sepe-rpt. doc 3 File E98-0019 Foster Heights Subdivision SEPA Staff Report • • Energy/Natural Resources Electricity and natural gas will be used for heating the future homes. The new home construction will conform to the most recent Uniform Building Code and Washington State energy code. Environmental Health Construction noises would exist during the building of the roads and other infrastructure and the homes. These noises would occur generally between the hours of 7:30 a.m. and 5:00 p.m., Monday through Saturday. Once construction is complete, then noise would be generated by the normal course of action of a residential subdivision. Land/Shoreline Uses The site is currently occupied by a single family house and outbuildings, which will be demolished for the construction of the new subdivision. The site is zoned Low Density Residential, LDR, with a minimum lot size of 6,500 square feet; the proposed subdivision conforms with the requirements of that zoning district. As noted earlier, the site does contain environmentally sensitive areas. The geotechnical report recommends that proper engineering design of homes and drainage to reduce the likelihood of slope problems. Sixteen two story, single family homes targeted to middle income families will be constructed. Housing One house will be demolished; sixteen new single family dwellings will be constructed on the new lots. Aesthetics The new homes will be compatible with the surrounding residential neighborhood. Light/Glare Not applicable. Recreation Not applicable. Historic/Cultural Preservation There are no known historic and cultural sites or objects on or next to this site. c:\carol\fheights\sepa-rpt.doc 4 File E98-0019 Foster Heights Subdivision SEPA Staff Report • • Transportation The site will be served by South 146th Street with an internal road system . The internal system is being designed so that the street that runs north/south can connect in the future to a road extension on the north which will be required as part of development on that residential site. This will ultimately connect South 146th and South 144th Streets. A pedestrian pathway will be constructed along South 146th from 51st Avenue South to 46th Avenue South. South 146th Street does not extend through to 51st Avenue South due to the steep terrain; the pedestrian path will provide a pedestrian link between the two streets to transit service which is located on 51st. Public Services The site is served by Val Vue Sewer District and Water District #125. A sewer line will be extended south on 51st Avenue South and then west to provide sewer service. The new development will generate an increased need for public services, however, this increase can be accommodated by current service levels. The eventual extension of the road from South 146th to South 144th will improve emergency access to the site for police and fire services. Utilities Utilities currently available at the site include electric, natural gas, water, refuse service, telephone, storm water and sanitary sewer. No additional utilities are anticipated to be needed as a result of the subdivision. Recommendation Determination of Nonsignificance c:\carol\fheights\sepa-rpt. doc 5 • • PUBLIC WORKS PROJECT REVIEW COMMENTS Project Name: % /"/`% i -)% 1 /i:Si Location: File#: Action: Date: Reviewed By: 77ZS- 77/ 9-ig PRIOR HISTORY AND CORRESPONDENCE FRANCHISE UTILITY COORDINATION CODE REQUIREMENTS OVERLAY PROGRAM RFA PW STANDARDS COMP PLAN CIP MISC. STUDIES MAINTENANCE NEEDS WD 125 VAL-VUE PRE -APP PROBLEM AREAS .//5ea/ ir-/ X).ch rev je, 7/.172 - -2-- —6 A.62.Z72.6.71 K‘,0-720-=05 ,2R,,S2 mea 7?-f---.:,/:lezeis 54/7fi -2 i oe Ai/ ko 5 -f -e_ co -a leicei7/61-/oerof4;7dayttri Y , a/ etJA,ac- a:6677,e) �� ar,r °A76177( 4 a}11' /67 'a F_CEIVED 1 JUL 101998 COMMUNITY +;EVELOPMEN T Z2 lZ „of on 49_rALd €ev-zain&-,7-72 I G//), bra,aJ 7C it?' CLGG.'V)J Y"p C c-/---;-a,e) /-2,621. „,,figee e.,e4t,//' 70(#1;`' 1/15/3 1,g-- /170iiii a k aav /22 614/1 / sO /;L 4�G�1 (9-2 ro a 7 a.) 5 / appezc>,ze,31 City of Tukwila • • John W Rants, Mayor Department of Community Development Steve Lancaster, Director June 29, 1998 NOTICE OF COMPLETE APPLICATION DATED JUNE 29,1998 Tom Redding Baima & Holmberg, Inc. 100 Front Street South Issaquah, WA 98027-3817 RE: Application for a subdivision. Foster Heights. located at 51st Avenue South and South 146th Street, L98-0019 and E98-0009 Dear Mr. Redding: Your application, on behalf of your client Richard Schroeder, Happy Valley Land Company, for a 16 lot subdivision, located at 51st Avenue South and South 146th Street has been found to be complete on June 29, 1998 for the purposes of meeting state mandated time requirements. The project has been assigned to me and is tentatively scheduled for a public hearing before the Tukwila City Council on August 17, 1998. The next step is for you to install the notice board on the site. Tukwila Municipal Code requires that the sign be installed within 14 days of the date of this letter -- however, as we have discussed, in order to meet the August 17 public hearing date, we are working with a very compressed timeline. As a result, you must install the notice board by Wednesday. July 1. 1998. 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, please return the signed Affidavit of Posting to our office. A public meeting tentatively has been scheduled for Tuesday, July 17, 1998 at 7:00 p.m. at the Foster Library Conference Room, located at 4060 South 144th Street in Tukwila. Please let me know as soon as possible if you or Mr. Schroeder have a conflict with that date. At our meeting on June 19, 1998, we agreed that you would submit the revised SEPA materials by June 26, 1998 with the remaining materials to be submitted two weeks later. To maintain the August 17, 1998 public hearing date, it is critical that the remaining information be submitted as soon as possible but no later than July 10, 1998. This determination of complete application does not preclude the ability of the City to require that you submit additional plans or information, if in our estimation such information is necessary to 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665 • • June 29, 1998 Mr. Tom Redding Foster Heights Subdivision ensure the project meets the substantive requirements of the City or to complete the review process. I will be contacting you soon to discuss this project. If you wish to speak to me sooner, feel free to call me at 431-3661. Sincerely, Carol Lumb Associate Planner cc: Jack Pace, Planning Manager Reviewing City Departments c:karol\fheighnkomplete ENVIRONMENTAL CHECKLIST Purpose of checklist: The State Environmental Act (SEPA), chapter 43.21C RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An environmental impact statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help 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. A. Background 1. Name of proposed project, if applicable: Foster Heights 2. Name of applicant: Richard Schroeder Happy Valley Land Company 3. Address and phone number of applicants and contact person: RECEIVED CITY OF TUKWILA JUN 2 6 1998 PERMIT CENTER Applicant: Richard Schroeder Happy Valley Land Company PO Box 1324 Issaquah, WA 98027 (425) 392-2742 Agent: Mike Budnick Baima & Holmberg, Inc. 100 Front Street South Issaquah, WA 98027-3817 (425) 392-0250 4. Date checklist prepared: March 11, 1998 5. Agency requesting checklist: City of Tukwila 6. Proposed timing or schedule (including phasing, if applicable): Construct summer 1999 7. Doou have any plans for future additions, expansions, or further activity relatedtoor connected with this proposal? If yes explain: No -1- • 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal: A geotech report has been prepared by Geospectrum 9. Do you know whether applications are pending for government approvals of other ,proposals directly affecting the property covered by your proposal? If yes Explain: No. 10. List any government approvals or permits that will be needed for you proposal, if known: Approval of engineering plans by City of Tukwila. Approval of water plans by W.D. 125. Approval of sewer plans by Val Vue. DOE METRO. 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) This proposal is to create a 16 -unit residential subdivision of a 3.14 -acre site. 12. Location of theproposal. Give sufficient information for a person to understand the precise location of your proposed project, including street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range of 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. Near the NW corner of the intersection of 51St Ave. S. with S. 146th St. extended. -2- • • TO BE COMPLETED BY APPLICANT B. Environmental Elements 1. Earth a. General description of the site (circle one) Flat, rolling, hilly, steep, slopes, mountainous. other b. What is the steepest slope on the site (approximate percent slope)? 22% ± c. What general types of soil 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: AGC, Alderwood, Gravely Sandy Loam. d. Are there surface indications of or history of unstable soils in the immediate vicinity? If so, describe: No. e. Describe the purpose, type and approximate quantities of any filling or grading proposed. Indicate source of fill: Grading & filling to construct roads, earthwork will be balanced on site. Approximate onsite grading is 1,000 cu yds. Select import will be required for road base (500 cu yd) f. Could erosion occur as a result of clearing, construction or use? If so, generally describe: Yes, some erosion will occur during construction, erosion will be controlled. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? 35% h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: An ESC plan will be prepared. Erosion control measures will be provided per City Standards. • • 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: Exhaust from construction equipment during construction. Automobile exhaust after construction. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe: None known c. Proposed measures to reduce or control emissions or other impacts to air, if any: Construction equipment will meet current emission standards; dust control will be provided during construction. 3. Water a. Surface: 1) Is there any surface water body on or in the immediate vicinity of the site (includingyear-round and seasonal streams, saltwater, lakes, ponds and wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into: No 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 waters or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material: N/A. 4) Will the proposal require surface water withdrawals or diversions? Give general description , purpose, and approximate quantities if known: None. • • 5) Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan: No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge: No. b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known: No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage: industrial. 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: N/A c. Water runoff (including storm water); 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so describe: Storm drainage from the development will be discharged to an onsite R/D facility in the eastern portion of the site. 2) Could waste materials enter ground or surface waters? If so, generally explain: Small amounts of oil associated with normal automobile maintenance may enter the surface water. d. Proposed measures to reduce or control surface, ground and runoff water impacts. If any: Storm detention and water quality control will be provided per King County SWM manual. -5- 4. Plants a. check or circle types of vegetation found on the site: XXX deciduous tree: alder, maple, aspen, other evergreentree: fir, cedar, pine, other 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? All vegetation will be removed in roadway areas. c. List threatened or endangered species known to be on or near the site: None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: N/A 5. Animals a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site: birds: hawk, heron, eagle, son birds, other mammals: deer, bear, elk, eaver, other fish: bass, salmon, trout, herring, shellfish, other b. List any threatened or endangered or endangered species known to near or on the site: None known. -6- • • c. Is the site part of a migration route? If so, explain: No. d. Proposed measures to preserve or enhance wildlife, if any: N/A 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used for heating, manufacturing, etc.: Electricity and natural gas will be used for heating future homes. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe: No. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: New home construction would conform to the most recent UBC and the Washington State energy codes. 7. Environmental Health a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe: No 1) Describe special emergency services that might be required. None. 2) Proposed measures to reduce or control environmental health hazards, if any: None. b. Noise 1) What types of noise exist in the area which may affect your project (for example: Traffic, equipment, operation, other)? Traffic -7- • • 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. Construction noises would exist during the building of the roads and homes. These noises would occur generally between 7:30 am - 5:00 pm, Monday through Saturday. Once construction is complete, then noise would be generated by the normal course of action of a residential subdivision. 3) Proposed measures to reduce or control noise impacts, if any: None. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The site is currently occupied by a single family home and outbuildings. b. Has the site been used for agriculture? If so, describe: N/A c. Describe any structures on the site: Single family home and outbuildings. d. Will any structures be demolished? If so, what? Home and outbuildings will be demolished. e. What is the current zoning classification of the site: LDR f. What is the current comprehensive plan designation of the site? LDR g. If applicable, what is the current shoreline master program designation of the site? N/A h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify: Yes, an area adjacent to 51st Ave. S. has slopes of greater than 20%. The adjacent road cut in the R/W has a slope of about 40% to 50%. The 2/10/98 geotechnical evaluation by Geospectrum Consultants suggests that proper engineering design of homes and drainage in this area will reduce the likelihood of slope problems. • • -8- i. Approximately how many people would reside or work in the completed project? About 50 people will reside here j. Approximately how many people would the completed project displace? One residence. 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: Urban zoning permits single family development. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing: 16 new middle income homes. b. Approximately how many units, if any would be eliminated? Indicate whether high, middle, or low-income housing: One —.middle. c. Proposed measures to reduce or control housing impacts, if any: None. 10. Aesthetics a. What is the tallest height of any proposed structure(s). not including antennas: what is the principle exterior building material(s) proposed? Two story homes b. What views in the immediate vicinity would be altered or obstructed? None. c. Proposed measures to reduce or control aesthetic impacts, if any: None. • • -9- 11. Light and Glare a. What type of Tight or glare will the proposal produce? What time of day would it mainly occur? Light from windows of homes. b. Could lght or glare from the finished project be a safety hazard or interfere with views? No c. What existing off-site sources of light or glare may affect your proposal? Light from windows of homes. d. Proposed measures to reduce or control light and glare impacts, if any: None. 12. Recreation a. What designated and informal recreational opportunities are in the immediate vicinity? N/A b. Would the proposed project displace and existing recreational uses? If so, describe: No c. Proposed measures to reduce or control impacts on recreational opportunities to be provided by the project or applicant, if any: None 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: No. • • -10- b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site: None. c. Proposed measures to reduce or control impacts, if any: None. 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: South 146th Street. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? Not known. c. How many parking spaces would the completed project have? How many would the project eliminate? The completed project would create 2 parking spaces per new single family dwelling. 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). New onsite roads will be required to serve the development. All new roads will be public. 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: 160 vehicular trips per day (Using a conservative estimate of 10 trips per day per lot). Most of the tnps would occur during AM and PM commute times. -11- g. Proposed measures to reduce or control transportation impacts, if any: Traffic mitigation fees will be paid by development, if required. 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: There will be a small, undetermined increased need for all of the above public services due to the development. b. Proposed measures to reduce or control direct impacts on public services, if any: Traffic and school mitigation fees will be paid. Increased tax base from 16 new homes. 16. Utilities a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. Cable 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. Electricity, gas, water, telephone, sanitary sewer and cable TV C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make a decision. Signature: '• -�,��� �.• - t Date Submitted: (,(z6(is • City of Tukwila mens Department of Community Develop NOTICE OF INCOMPLETE APPLICATION April 28, 1998 Mr. Michael Bum Baima & Holmberg, Inc. 100 Front Street Issaquah, WA 98027-3817 RE: John W. Rants, Mayor Steve Lancaster, Director Dear Mr. Budnik: ' application fora 16 lot subdivisiondertreviewing to review your pp if extended. and South 146th Street, e, pursuant to TMC d near I have had an opportunity f 51st South information the intense ed that it is submittal package, please provide the following the materials you submitted, I have determined 18.104.060. To complete the s and/or materials: 1. T. o1,r��r11_rlt��' existing lot to be es of the existing lot(s) (any the boundaries (TMC 17.14.020(A)(7)(ents. a.Lines markingand proposed A)(7) ' ated should be a dashed line soxostmg extent of existing eliminated a and b. Location, dimension and purpose identify the nature Provide recorded documents 020(A)(7)(g)a sensitive area or its easements sizeTMC and species of any tree located within ation, P none of these trees are to be removed vevdita and c. Locass on individual to ir buffer or is notshorelinelikely Bo eate undue hardship on location nance (TMC 17,014.020( )( ) to the tree ordinance - T„awita. Washington 98188 • (206) 431-3670 • Far (206) 431-3 City of Tukwila, Washington April 28, 1998 Mr. Michael Budnik d. A survey of existing trees and vegetation with a retention/removal plan for the preservation of significant trees and vegetation (TMC 1 7.0 1 4 . 02 0(A)(7)(o). e. Expected location of new buildings, their driveways and finished floor elevations (TMC 17.014.020(A)(7)(p). f. Relevant buildings and features such as rockeries and fences. Existing and proposed structures which will be in place upon final plat approval. Landscape Plans: a. Existing trees over 4" in diameter showing size, species and location. Identify those that will be retained. b. Proposed landscaping, identifying quantity, size, species and spacing which is prepared and stamped by a landscape architect with a professional license from the State of Washington. 2. PUBLIC WORKS: The following two items are needed in order to complete the application. Public Works staff also provided general comments that are being passed along now, but do not need to be resolved until the staff report is being prepared. One additional engineering comment is provided -- this must be addressed after preliminary plat approval. 2 c:karo \fheight\foater City of Tukwila, Washington April28, 1998 Mr. Michael Budnik a. Traffic study (per TMC 9.48.070) describing trip generation and distribution, sight distance, pedestrian connections and safety for bus zones and schools. b. Level 1 downstream storm drainage analysis with core and special requirements narrative for King County Surface Water Design Manual. GENERAL COMMENTS a. The road networks look OK. b. A pedestrian connection to 51st Avenue South is needed via South 144th Street in unopened ROW. c. The sanitary sewer in 51st Avenue South is not constructed to point of connection. The applicant must research and verify sewer system availability and location. d. A bioswale is needed for water quality treatment. CPS (coalescing oil/water separator) is not acceptable. Bioswale to be maintained by homeowner. e. Detention tank to be located in separate tract for maintenance by City. f. Due to the steep site, poor soils and sensitive downstream drainage, all sit work shall be completed between April 1 and October 15. Site shall be hydroseeded and "put to bed" with complete TESCP (temporary erosion control plan) in place by October 15. ENGINEERING COMMENT a. Water, sewer, storm and road engineering details are not acceptable as designed. The concept is acceptable for preliminary plat approval; detailed engineering review will be conducted for the plat after preliminary plat approval. 3. FIRE DEPARTMENT: a. Please indicate the location of existing and proposed fire hydrants to serve the project (TMC 17.014.020(A)(7)(m). Hydrants are required to be within 150 feet minimum of a structure in a subdivision. 3 c:kuoI heightslfo,ter • • City of Tukwila, Washington April 28, 1998 Mr. Michael Budnik 4. MISCELLANEOUS: a. King County Assessor's maps which show the location of each property within five hundred (500) feet of the subdivision, and three sets of mailing labels for all property owners and tenants (residents or businesses) within five hundred (500) feet of the subdivision. Since the time of the preapplication meeting, and prior to the submittal of this subdivision application, the subdivision code has been revised by the Tukwila City Council to require three sets of mailing labels, rather than two. Please supply the third set. b. Proof that the lot or lots are recognized as separate lots pursuant to the provisions of TMC Title 17 and RCW 58.17 (TMC 18.104.060(1)(e). Information was not supplied for Parcel B (existing Lot 12) or Parcel D (existing Lot 14). c. A Planned Residential Development application and fee ($800 + $100/acre) must be submitted. TMC 18.45.060 requires the Planned Residential Development process be used when sensitive features, such as geologically unstable areas, are located on the subdivision site. d. A surrounding area map showing existing land uses within a 1,000 -foot radius from the site's property lines must be submitted. E98-0009 (SEPA) Some of the items on the SEPA checklist have been corrected manually and should be retyped; other items need additional information as follows: 1. Item 11, page 2 (retype to correct the number of lots) Item 12, page 2 correct 51st Avenue SE to 51st Avenue South 2. Item 8f, page 8: show Comp Plan designation 3. Item 8h, page 8: Portions of the site are classified as "sensitive area": please discuss sensitive areas, 20%+ slopes, Class 2 potential geologic unstable area. 4. Item 9a, page 9 (retype to correct the number of lots) 5. Item 14f, page 11: retype to correct the number of vehicular trips per day and provide supporting documentation (traffic study noted under comments by Public Works Department, etc.) 6. Item 15a, page 12: provide estimates or more specific information Item 15b, page 12: correct number of new homes. The information requested to complete the application must be submitted within 90 days of this notice, otherwise the application will be canceled (TMC 18.104.070 E.). Once the additional information is received, a tentative public hearing can be scheduled -- 4 c:\carol\fheighn\foster City of Tukwila, Washington April 28, 1998. Mr. Michael Budnik so the sooner the additional information is received, the sooner the tentative public hearing can be scheduled. If you have any questions, please call me at 431-3670. Sincerely, Carol Lumb Associate Planner Enclosure: Planned Residential Development Application cc: Jack Pace, Planning Manager, Department of Community Development Gary Barnett, Senior Development Engineer, Department of Public Works 5 c:\amMuightsVosta PRE PLAT COMMENTS COMMENTS MEMO TO: Carol Lumb FROM: Deb Ritter DATE: April 17, 1998 RE: Foster Heights Subdivision L98-0019 (Subdivision) E98-0009 (SEPA) The above -referenced applications were filed on March 31st. We must respond either with comments or with a Letter of Completeness within 28 days (April 28). This is a Type 5 Application. I've attached copies of all comments from the other departments. I've also reviewed the application packet and believe that it is incomplete. Based on everyone's completeness review, the following is a list of items that are lacking: L98-0019 (SUBDIVISION) 1. PLANNING/ENVIRONMENTAL: Site and Development Plans: [Please note: Gary Schulz gave his comments verbally. He will try to follow with written comments the week of April 20.] a. Lines marking the boundaries of the existing lot(s) (any existing lot to be eliminated should be a dashed line and so noted (TMC 17.14.020(A)(7)(b). b. Location, dimension and purpose of existing and proposed easements. Provide recorded documents which identify the nature and extent of existing easements (TMC 17.014.020(A)(7)(g). c. Location, size and species of any tree located within a sensitive area or its buffer or the shoreline unless none of these trees are to be removed and their location is not likely to create undue hardship on individual Tots with respect to the tree ordinance (TMC 17.014.020(A)(7)(k). d. A survey of existing trees and vegetation with a retention/removal plan for the preservation of significant trees and vegetation (TMC 17.014.020(A)(7)(o). e. Expected location of new buildings, their driveways and finished floor elevations (TMC 17.014.020(A)(7)(p). f. Relevant buildings and features such as rockeries and fences. Existing and proposed structures which will be in place upon final plat approval. Landscape Plans: a. Existing trees over 4" in diameter showing size, species and location. Identify those that will be retained. • Carol Lumb April 17, 1998 Page 2 b. Proposed landscaping, identifying quantity, size, species and spacing which is prepared and stamped by a landscape architect with a professional license from the State of Washington. 2. PUBLIC WORKS: [Please note: Joanna has provided additional comments and requirements that will have to be addressed by the applicant during technical review. However, this information should be given to the applicant now as a courtesy. I've attached Joanna's comments so you can insert them into your letter of incompleteness.] a. Traffic study (per TMC 9.48.070) describing trip generation and distribution, sight distance, pedestrian connections and safety for bus zones and schools. b. Level 1 downstream storm drainage analysis with core and special requirements narrative for King County Surface Water Design Manual. 3. FIRE DEPARTMENT: [Please note: Nick has also included his technical review comments. You may wish to advise the applicant in advance of these requirements. Nick's comments regarding cul-de- sac diameter is still be discussed see Jack or myself for an update on what will be required. I've attached copies of memos to and from the Fire Department on this topic.] a. Location of existing and proposed fire hydrants to serve the - project (TMC 17.014.020(A)(7)(m). Hydrants are required to be within 150 feet minimum of a structure in a subdivision. 4. MISCELLANEOUS: a. King County Assessor's maps which show the location of each property within five hundred (500) feet of the subdivision, three sets of mailing labels for all property owners and tenants (residents or businesses) within five hundred (500) feet of the subdivision. Only two sets of labels provided, 500 feet radius not indicated on Assessor's maps. b. Proof that the lot or lots are recognized as separate lots pursuant to the provisions of TMC Title 17 and RCW 58.17 (TMC 18.104.060(1)(e). Information was not supplied for Parcel B (existing Lot 12) or Parcel D (existing Lot 14). c. A Planned Residential Development application and fee ($800 + $100/acre). d. Surrounding area map showing existing land uses within a 1,000 -foot radius from the site's property lines. • • Carol Lumb April 17, 1998 Page 3 E98-0009 (SEPA) Some of the items on the applicant's SEPA checklist have been corrected manually and other items need additional information as follows: 1. Item 11, page 2 (retype) 2. Item 8f, page 8: show Comp Plan designation 3. Item 8h, page 8: discuss sensitive areas, 20%+ slopes, Class 2 4. Item 9a, page 9 (retype) 5. Item 14f, page 11: retype and provide supporting documentation (traffic study, etc.) 6. Item 15a, page 12: provide estimates or more specific information Please route a draft copy of your letter to Nick Olivas (Fire), Joanna Spencer (Public Works), Gary Schulz (Environmental) and Bob Benedicto (Building). If they have no other changes or revisions, you can send the letter to the applicant. To: From: Subject: Date: • City of Tukwila John W. Rants, : vlayor• Fire Department Deb Ritter Chief Olivas Foster Heights Subdivision April 14, 1998 Thomas P. J'Ceefe, Fire Chief RECEIVE) APR 15 1993 COMMU \!ITY DEVELOF MEN ;' Thank you for your memo on The Foster Heights Subdivision including the water availability. information. Regarding the culde-sac issue, the minimum diameter we require is 81 feet. We will not approve this project without this diameter. City Ordinance # 1741 states in part: " All dead end access roads in excess of 150 feet shall be provided with approved provisions for the turning around of fire apparatus" (emphasis; added) . The 81 foot diameter is one approved provision, the other is a hammer head turn around. Please contact me with any questions you have regarding this issue. cc: Steve Landcaster Jack Pace Headquarters Station: 444 Andover Park East e Washington 98188 0 Phone: (206) 575-4404 o Fr:x (206; 5. 5-443(7 MEMO TO: Nick Olivas FROM: Deb Ritter DATE: April 14, 1998 RE: Foster Heights Subdivision 51st Avenue South & South 146th Street L98-0019 E98-0009 Thanks for your completeness comments on this file. This is in response to two of your comments (copy of your Routing Form attached). Water Availability I've attached a copy of the Certificate of Water Availability which was in your packet. Per this certificate, It appears that 1875 gpm at 20 psi will be available. Cul -de -Sac Diameter I've attached a copy of the chart from the recently revised Subdivision Ordinance. It shows that the minimum cul-de-sac diameter for single family is 60 feet wide. We cannot require that it be 81 feet wide unless: "the City Engineer demonstrates a wider width is needed due to site circumstances, including but not limited to topography, traffic volume, street patterns, on -street parking, lot patterns, land use and bike and transit facilities, that justify an increase in width." Attachments cc: Jack Pace 'F'N"LA. k' k CITY OF.,TUKWILA ,9 Permit Ce RECEIVED• !'1 CITY 01= 6300 South enter Boulevard, Suite 100, Tukwila, WA 981.88 Telephone: (206) 431-3670 f:a r/1 '_ 3 1.11 rr. ,.. +a.tt .N.'. PROJECT #: ate 1 s.t,l• (Required only if outside City of Tukwila water utility distrix:. n" da+ a R '.;;; 't !' slaw.styt'.. eaQmplete al. Site Address (Attach map and Legal Description showing h S/ S T , (/G s . S. /46 Sr- ai 315 i L I^i`I not location and size of main): /IIG(./ QU/-{-.61-rUT) Name: A ,4t?.y L,g✓t/D Co Address: P U, ;Box /324, /sshwahti,5ww. 98p27 Phone:(¢2,r) 39Z Z742— This 742_ This certificate is for the purposes of: ❑ Residential Building Permit ❑ Commercial/Industrial Building Permit Name: g4//2/4 1104416E //qj, - / a ✓v! c/., Address: /do ,..26,O 7- 55: So ./ /5 S. ?), , (202x, Phone: (425') 39Z -6 2.670 21 Preliminary Plat ❑ Rezone ❑ Short Subdivision ❑ Other Estimated number of service connections and meter size(s): /3 - /( ebOn/N C- 77ONS' 34 ME -MS- s Vehicular distance from nearest hydrant to the closest point of structure t /SO ft. Area is served by (Water utility district): /, r .„0/s firer 4/0 , /zs` Owner/Agent Signature: The proposed project is located within Date: to -Z— '7 Y l,4 {. iyllHit li 1 1 > ..y, 1;' iAf' 4TEV.1!T.)ST.A II ITFt (City/County) The improvements required to upgrade the water system to bring it into compliance with the utilities' comprel1ensive plan or to meet the minimum flow requirements of the project before connection; ,GC b‘n.,.,e.' 1/ vY) `'L`(C'-'(XV or(cc-e ( )(( f \Uts-1% P -pp kt all D, . 12 Star'A-,c j s --(-4s 1-‘15' n (Use separate sheet if more room is needed) \.G c Based upon the improvements listed above, water can be provided and will be available at the site with a flow of j g 7S gpm at 20 psi residual for a duration of 2 hours at a velocity of 1 ( fps as documented by the attached calculations. Il hereby certify that the above information is true and correct. rcCS v t "i,r_ p (SI i 2 S Agency/Phone ' (742-7 S-(-7' j `i By Wed' a; •'ove n... .ur..i • c Water Availability: ❑ Acceptable service can be provided to this project El 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. Date >>.be co • Minimum water system improvements: (At least equal to B2 above Use separate sheet if more room is needed) Agency/Phone By Date WTRAVAIL. DOC 6/5/96 • • c. The proposed private access roads can accommodate potential full (future) development on the lots created; and d. For residential subdivisions, the proposed private access roads do not serve more than four (4) lots nor are more than two hundred (200) feet in length. Those access roads one hundred and fifty (150) feet or greater in length shall have a turn around built to Fire Department standards. e. For commercial and industrial subdivisions, when private access roads are authorized, there shall be a minimum easement width of forty (40) feet. With the exception of minimum easement widths, private access roads shall be designed and constructed in accordance with the Department of Public Works standards, and zoning setbacks shall be required as though the easement were a public right-of-way. 6. Public Roads: a. Right-of-way and paving widths for public roads shall be based on the table below. The minimum paving and right-of-way width shall be used unless the City Engineer demonstrates a wider width is needed due to site circumstances, including but not limited to topography, traffic volume, street patterns, on -street parking, lot patterns, land use and bike and transit facilities, that justify an increase in Width. Type of Street Right -of -Way Roadway Pavement Principal Arterial 80 - 100 feet 48 •84 feet Minor Arterial 60 - 80 feet 36 - 64 feet Collector Arterial 60 • 80 feet 24 •48 feet Access Road 50 • 60 feet 28 -36 feet Cul -De -Sac Roadway 40 feet 26 feet . Turnaround (single family) 80 feet (diameter) 60 feet (diameter) Turnaround (multifamily, commercial) 92 feet (diameter) 81 feet (diameter) Alley 20 feet 15 feet Private Access Roads Residential • 20 feet 20 feet Commercial '40 feet 28 feet b. Design: The design and alignment of all public streets shall conform to the following standards unless otherwise approved by the Departinent of Public Works: 1) Cul-de-sacs: Cul-de-sacs are not allowed unless there is no reasonable alternative or the cul-de-sac is shown on an officially adopted street plan. When allowed, they shall not exceed a length of six hundred (600) feet unless the City Council determines that adequate alternative emergency access will be provided. 2) Street Grades: Street grades shall not exceed fifteen percent (15%). However, provided there are no vehicular access points, grades may be allowed up to eighteen percent (18%), for not more than two hundred (200) feet when: a) Exceeding the grades would facilitate a through street and connection with the larger neighborhood; b) The greater grade would minimize disturbance of sensitive slopes; c) The Fire Marshal grants approval of the grade transition; and d) Tangents, horizontal curves, vertical curves, and right-of-way improvements conform to Department of Public Works standards. c. Full Width Improvement: When interior to a subdivision or a short plat of five or more lots, all publicly owned streets shall be designed and installed to full width improvement as provided below: 1) Shall be graded as necessary to conform to Department of Public Works standards. 2) Shall be of asphaltic concrete according to Department of Public Works standards. CITY a*ruKwILa Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 ENVIRONMENTAL REVIEW (SEPA) APPLICATION To submit for SEPA review, provide the items listed above to the Planning Division at 6300 Southcenter Boulevard, Room 1.00. ❑ 6 copies of the completed and signed environmental checklist. You may use the City's pre-printed form or you may re -type the questions on your computer. If you choose to re -type the form into your computer, be sure to do so accurately. Mistakes or omissions will increase the review time. ❑ 6 sets of the full size plans needed to clearly describe the proposed action. ❑ One set of plans reduced to 8.5" x 11". ❑ Four copies of supporting studies.., ❑ One copy of the checklist application. ❑ One set of mailing labels for all properties 500' from the subject property. (See address label worksheet.) ❑ $325 filing fee. The checklist contains several pages of questions which you are asked to answer. It covers a comprehensive set of topics. As a result, several of the questions may not apply to your project. If a particular question does not apply, simply write N/A underneath. HOWEVER, be aware that many questions apply despite appearing not to. Care needs to be taken in reading and answering the questions to ensure the appropriate response is provided. It is important that accurate and clear information be provided. You may not know all of the answers. Answer each question to the best of your ability. If. we find an answer to be insufficient, —the City may contact you to ask for more information. Sometimes, after reviewing the checklist, the City will ask you provide additional studies or information. Commonly requested information includes traffic analysis, site topography, soils studies and tree surveys. ,. • CITY OF TUKWILA Department of Community Development 6300 Sputhcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 SEpA APPLICATION CHECKLIST' A. NAME OF' PROJECT/DEVELOPMENT: rEg /-1E/e 14-7-511 Bc LOCATION .OF PROJECT/DEVELOPMENT: (address and,accessors parcel number(s)) arit-vE, 5, 4, S. 14(... /-14 -> -x L.. i o 5 , c (94o0 0 — 053 9 os'So 0.5.4D Quarter: /y' Section: 2 Z Township: 23 Range: 4 (This information may be found on your tax statement) oss4 --PROD EGT DESCRIPTION: - !o i_ r- -5L i?,--DlVt 5 t o £ 11'J G Lam' / 6/4111+ D. APPLICANT: NAME: 1 -1 -APPY vA 1.1.x'1 i i) , mit % ozweei ) /A)-•/9'G&,v ADDRESS' 59/4441� -�0�/�%�C% f/�%t'.. — /00 fir Sr. Sor) /SS uM hi A.. Mg 7 PHONE: &ZS) 3 2 - a ZSrO , A u 4-2f) - 3o 5 5 cfn,.lwr1 oC���� ,,e_8/1044 -/N64166eiATE: 4 ` z -9 g 4J% 2/2 • d Md: aha Wd80:20 es, 20 ddd 3Plannett• • Fil4'NumBer• l ;: Recerpfi lut ib�e '� , + r `Y ...-n,,,:::,-...g-;•? , ',sir,' .can 4•••••,..7,10••;,. , : 1' , .;Y .1+Z ' .. ♦ ( ° Coss reference •files � J :.. r r -rw VA: ��1..4tc9011 KlrlrI i.,..4,`�, ', .{ :.7 .t,\ t ,rV 1 rrir� lcant�nottrieci,ot ncompietwa plication'•••••.:111....:1'..:S'l ( , q / < d..:,... i.,,r; r ...t 1,;4. 1Wt Itir J.�iX,a4wnf". ,. .elo1.%.(N r.•..:)%ir...'."✓ �.;S:1*'' t• ,� 2(.W .2. 4 1 fw:•. f•nl.l.� 2�Y 1 •. y T Y'e'' jy I' 'Yt ..d v.r+. ! .- P'( ••, `t.V i d Y i '•. �'�, ;ha •.fir>•;::v✓ ;« :t• .w-- ;.fir t, t , _App ican 4r2cir< decd;�of aomp"[eie'�appi'toat,on�=,.:::..{." 4'e7 j;; r 'rIo*,: l .I+0"e4 -2' SY,(i,.. p,�1 ,)r s*,,'.1'w Mh`•'nt•,'34. k\�.1. .Lrwl:ik; Y.L%Ji n C' ./r i ..i.... .}. se ''° _ ti:�_ f.C� X ! h r< ,.JI:: ; <,.�,��1..��,t((ti,))... ,w,,r,..',. t ) s � t -r S..r.,•P:44.,rt,y�tent. ;IV, ♦ L..•JAS al t.. ,.y, ..�. rr� .1. •.rA •ir �I,4 'r: ':'.;,;f..1s`•v. ..14•('y'•y it � �S 'H'Cll. y; �. � '(•:.< �1J 'Ly,+\' , �. i.♦^� •r;••• t• N � ���� � !!! lZ � Y' � ' Nat igi application , s jj ' < ? , t .-.• . i�1, S.:eY•\'‘`,,..,:n.,..... Mi C.Q.: ;,,,r:.:,t.1�' 0: c^S:(yi•(~i:i ��}LS•,r.:.a,,;+, V.t �.r:bf,r• �nf . u. 1., t•Y.`.:.4.Ohvtt.rV,:y y;��ir cGt ..::id,r,. �1 1i, r.wr�. _, -i ♦ t ,t4 ..s': .•�; '� .. .iJ•''4"," s 7 •{� jr.•4'r:•'tC'y .r .,.1' pry Ri, 1�t♦?,yM 'A`. �. i r � 1 .f f .[ ,�.t :I.,,r (1.�ri ;r .: x Nr<. t,'•: r .•W �tSv7.., .S'• ,P( -+Y'!...... .;: T'..•....... A. NAME OF' PROJECT/DEVELOPMENT: rEg /-1E/e 14-7-511 Bc LOCATION .OF PROJECT/DEVELOPMENT: (address and,accessors parcel number(s)) arit-vE, 5, 4, S. 14(... /-14 -> -x L.. i o 5 , c (94o0 0 — 053 9 os'So 0.5.4D Quarter: /y' Section: 2 Z Township: 23 Range: 4 (This information may be found on your tax statement) oss4 --PROD EGT DESCRIPTION: - !o i_ r- -5L i?,--DlVt 5 t o £ 11'J G Lam' / 6/4111+ D. APPLICANT: NAME: 1 -1 -APPY vA 1.1.x'1 i i) , mit % ozweei ) /A)-•/9'G&,v ADDRESS' 59/4441� -�0�/�%�C% f/�%t'.. — /00 fir Sr. Sor) /SS uM hi A.. Mg 7 PHONE: &ZS) 3 2 - a ZSrO , A u 4-2f) - 3o 5 5 cfn,.lwr1 oC���� ,,e_8/1044 -/N64166eiATE: 4 ` z -9 g 4J% 2/2 • d Md: aha Wd80:20 es, 20 ddd GEOSPECTRUM CONSULTANTS, INC. Geotec%�r�icci/ ar-7c 1 Ecart/-, Scierices February 10, 1998 Mr. Richard Schroeder Happy Valley Land Company P.O. Box 1324 Issaquah, WA 98027 Subject: GEOTECHNICAL EVALUATION Proposed 16 -Lot Foster Heights Plat Development South 146th Street & 51st Avenue South Tukwila, Washington Project No. 98-103-01 RECEIVED CITY OF TUKWILA MAR 3 1 1998 PERMIT CENTER Dear Dick, This report presents the results of our geotechnical investigation performed on the site of the proposed Foster Heights residential development. The purpose of the investigation was to provide geotechnical engineering evaluations of the site conditions and geotechnical recommendations for site grading including optimum timing of site grading and general recommendations for site development. A preliminary plat map prepared by Baima & Holmberg, Inc. dated 9/12/97 was provided to us and used as a reference for our site explorations and our evaluations and recommendations. Based on the referenced plat map shown in Figure 2, the proposed plat includes 16 Tots within the subject property. Access to lots 1 -14 will be provided by new cul- de-sac streets (Road A and Road B) which will join South 146th Street at the southwest corner of the property. from 240th. Lots 15 and 16 will be accessed directly from 51st Avenue South. Although no . site grading exists at this time is expected that cuts and fills of only about 5 to 10 feet will be required for street construction. Development of the single family residence Tots is expected to be one or two story wood frame homes. Foundation load information is not available at this time but for the purpose of our evaluation bearing wall Toads for the residence structures are assumed to be on the order of 1 to 2 kif. If actual structural loads exceed the above values by more than 25%, this office should be notified. P.O. Box 276, Issaquah, WA 98027-0276 Phone: (206) 391-4228 Fax: (206) 391-4228 Happy Valley Land Co. February 10, 1998 SCOPE OF WORK Our geotechnical evaluation included subsurface exploration, engineering evaluations and the preparation of this report. The scope of work included the following specific tasks: o Reviewed published geologic mapping of the site vicinity. o Performed a reconnaissance of the site to observed surface conditions. o Observed the excavation of 5 test pits to depths ranging from 4 to 6 feet below the ground and excavated one hand -auger test pit on Lot 16. Approximate locations of the test pits are shown on Figure 2. o Continuously logged the subsurface conditions, as encountered in the test pits at the time of excavation. Logs of the test pits are presented on the summary sheets of Appendix A. o Performed geotechnical engineering evaluations of the site and developed geotechnical recommendations for site grading and general site development. o Prepared this geotechnical report summarizing our findings and recommendations. OBSERVED SITE CONDITIONS At the time of our field investigation the property was undeveloped except for the existing residence and out -buildings on Tots 5, 15 and 16 as shown on Figure 2. Vegetation on the site consisted primarily of blackberries with grass and scattered fruit trees and maple trees that ranged up to 3 + feet in diameter. Topography in the general site vicinity is gently to moderately sloped down to the east. The referenced topography map provided to us indicates the maximum elevation difference across the site to be on the order of about 90 feet. Most of the site is gently sloped with gradients ranging from about 7 to 22 percent based on the topography map. Steeper slopes exist on the eastern half of Lots 15 and 16 where gradients of about 40 to 50 percent exist. Subsoils Our evaluation of the subsurface conditions was based on our observations of the exploratory test pits and surface observations. Subsoils encountered in the test pits were generally found to be natural glacial till soils with localized areas of fill soils. We noted apparent shallow fill deposits in the graded area of Lots 5, 15 and 16. The natural soils generally included a layer of dark brown topsoil with organics and roots which typically ranged from about 6 to 12 inches thick. The underlying weathered natural soils were typically brown to gray brown or gray and red -brown sandy silt or silty fine sand with gravel. The weathered soils were generally soft or loose to depths of about 2 to 3 feet below the natural surface based on the test pits Project No. 98-103-01 Page 2 Happy Valley Land Co. February 10, 1998 and surface probing. Deeper natural soils were firm to very stiff/hard and medium dense to very dense to the depths of the test pits. Fill soils were encountered in Test Pit 6 to a depth of about 3 feet. The fill soils were very soft/loose and wet sandy silt/silty fine sand. Surface topography of Lots 5, 15 and 16 indicates other probable fill deposits in the graded areas around the existing house (see Figure 2). Ground Water We observed that the surface soils were generally very moist over most of the site and some areas were especially wet or had surface drainage or seeps as indicated on Figure 2. The site soils were generally classified as very moist to wet and measured moisture contents were generally high, ranging from about 17.1 to 40.6 percent. Most of the soils had moisture contents between about 20 to 30 percent. Seepage was typically observed at the base of the upper weathered soils in Test Pits 1 through 5. Ground water was observed to rise to about 9 inches below the fill surface in the hand-augered Test Pit 6 east of the existing house on Lot 16. Subsurface Variations Based on our experience, it is our opinion that some variation in the continuity and depth of subsoil deposits and ground water levels should be anticipated due to natural deposition variations and previous onsite structures and grading. Due to seasonal moisture changes, ground water conditions should be expected to change with time. Care should be exercised when interpolating or extrapolating subsurface soils and ground water conditions between or beyond our test pits. SITE EVALUATIONS General The referenced geologic map of Figure 1 indicates the site to expose glacial till (Qt) soils. The referenced map describes the Qt soils as intimately graded mixture of clay to gravel sized soils. The glacial till was deposited during the advance of the Vashon glaciation, the last glacial advance into the Puget Sound area, approximately 13,000 to 16,000 years ago. Based on our explorations the site soils are sandy silt and silty very fine sand glacial till soils which are typically weathered, soft/loose and very moist to wet in the upper 2 to 3 feet becoming very stiff to hard below those depths. Fill soils were observed in the vicinity of lots 5, 15 and 16. The upper weathered site soils and fill are not considered suitable for direct support of pavements or foundations, however, in our opinion the site can be developed as planned provided that our recommendations are followed. Project No. 98-103-01 Page 3 Happy Valley Land Co. February 10, 1998 Site Stability The referenced geologic map of Figure 1 does not indicate any known landslides in the site vicinity. Our observations of the existing site revealed no indications of recent or current instability. In our opinion the unweathered glacial soils which underlie the site are generally stable with regard to gross stability. There is always risk involved with construction on or near a slope and the lot owners must be willing to accept the risk of future instability which may result in damage to their property or neighboring property. In general slope failures are most likely to be shallow failures occurring during the winter and spring months due to increased soil moisture conditions and during earthquake shaking due to additional dynamic loads on the slope. In our opinion the risk of damage due to instability on Lots 1-4 and 6-14 is low. The risk of instability damage on Lots 5, 15 and 16 is considered moderate to high due to the wet conditions, the steeper slopes and existing fill. In addition the risk of shallow failures of the very steep road cut along 51st Avenue South is considered high. Risk of slope failure can be reduced by incorporating proper engineering design and providing and maintaining control of surface runoff and subsurface drainage. Site Grading Considerations Currently no street grading plan or street profiles exist, however we expect that cut/fill depths should be on the order of about 10 feet or less. We expect that the grades for Roads A and B will primarily be within the upper weathered soils which will not be suitable for direct subgrade support. The soft/loose weathered soils should be excavated from the street subgrade areas to expose stiff/hard soils and structural fill placed to the final street subgrade. Based on our experience the onsite soils will be quite moisture sensitive with regard to grading and compaction characteristics and the measured moisture contents indicate that the onsite soils are currently too wet to obtain adequate compaction. In our experience the onsite soils will be very difficult to compact unless they are dried out sufficiently. Site grading should be scheduled during warm, low humidity weather typically occurring in the late summer months to reduce the potential problems associated with wet soils and ground water seepage. Unless the onsite soils can be dried to near optimum moisture content, site grading will require the use of imported granular fill soils for proper compaction. In addition the onsite soils are not considered suitable for backfill within the drainage zone of basement walls or other retaining walls. Residential Foundations Existing soft/loose, organic and fill soils are not considered suitable for foundation support. Foundations should penetrate through the upper unsuitable soils to bear in very stiff/hard natural soils. In our opinion conventional spread footings founded on the very stiff/hard natural soils should provide good support for the residence structures. Where grading is performed to level specific lots for development, all fill should be placed and compacted asstructural fill. Project No. 98-103-01 Page 4 Happy Valley Land Co. February 10, 1998 RECOMMENDATIONS The following subsections present our geotechnical recommendations for site grading, street subgrade preparation, residential foundations and retaining walls. Also included are recommendations for site drainage, erosion control, plan review and observations and testing during construction. Site Grading Site grading is expected to consist primarily of excavation and fill placement to prepare the access roads subgrade, create building pads and backfill utility trenches and possibly retaining walls. Stripping depth required in areas with no existing fill is expected to be about 2 to 3 feet. Excavation of the on-site glacial till materials is expected to be difficult at depths greater than about 5 or 6 feet. Onsite soils are not generally considered suitable for use in compacted fills because in our experience these soils are quite moisture sensitive with regard to trafficability and compaction characteristics and are currently too wet for adequate compaction. If grading is scheduled for the late summer months moisture conditions of the onsite soils may be more suitable for compaction. Site grading will likely require the use of imported granular fill soils for proper compaction and drainage. Onsite soils are not considered suitable for backfill against retaining walls because they will not be adequately free -draining. Retaining wall backfill will require clean sand/gravel soils. Recommendations for site preparation, temporary excavations, structural fill, permanent slopes and street subgrade preparation are presented below. Site Preparation: Existing vegetation, debris, and soft or loose soils and existing fill should be stripped from the areas that are to be graded. During rough grading, excess soils may be stockpiled for later use. Soils containing more than 1% by weight of organics may be used in planter areas, but should not be used for fill beneath building or pavement areas. Stumps, debris and trash, plus rocks and rubble over 6 inches in size, should be removed from the grading areas. Subsoil conditions on the site may vary from those encountered in the test pits. Therefore, the soils engineer should observe the prepared areas prior to placement of any new fills. Temporary Excavations: Sloped temporary construction excavations may be used where planned excavation limits will not undermine structures or interfere with other construction. Where there is not enough room for sloped excavations, shoring should be provided. Contractors should note that excavation of the unweathered glacial till may be very difficult with conventional backhoe equipment. Based on the subsurface conditions encountered in our test pits, it is our opinion that sloped temporary excavations may be made vertically to depths Tess than 4 feet. Deeper temporary excavations up to 10 feet should be made at slope gradients no steeper than 1: 1 (horizontal:vertical) for the loose to medium dense soils and 3/4 : 1 (horizontal:vertical) for the glacial till soils, however it should be noted that the contractor is responsible for safety and maintenance of construction slopes. Project No. 98-103-01 Page 5 Happy Valley Land Co. February 10, 1998 Surface drainage should be directed away from the top edge of cut slopes. Surcharge loads should not be allowed within 5 feet of the top of cut slopes or within a 1:1 (horizontal : vertical) plane extending up from the toe of excavation, whichever is greater. Structural Fill: Provided that soil moisture can be reduced and maintained near optimum, excavated onsite soils may be used for structural fill. However these soils are expected to be moisture sensitive and are currently too wet for practical compaction. Therefore imported granular fill soils should be used if moisture conditions cannot be adequately controlled. Loose soils, formwork and debris should be removed prior to placing fill or backfill. Imported free -draining granular soils should be used for backfill of retaining walls, and should be capped with pavement or 12 inches of onsite silty soils to reduce surface water infiltration. Onsite soils or imported granular fill should be placed in horizontal lifts not exceeding 8 inches in loose thickness and compacted to at least 90 percent of the maximum dry density as determined by the ASTM D1557-91 test method. Imported granular fill should consist of clean, well -graded sand and gravel materials free of organic debris and other deleterious material. Imported material for wall drainage zone backfill should be a clean sand/gravel mixture with less than 5 percent fines based on the sand fraction. Fill Slopes: All permanent fill slopes should be constructed of properly placed and compacted structural fill with gradients no steeper than 2:1 (h:v). All existing fill, vegetation, debris, and loose/medium dense soils should be removed from proposed fill slope areas prior to fill placement (see "Site Preparation"). Where underlying natural slope gradients are 20% or more, fill slopes should be keyed and benched • into undisturbed dense natural soils. Key width should be at least 8 feet or 1/3 the slope height whichever is greater. Key depth should penetrate at least 2 feet into undisturbed dense natural soils. All fill should be placed and compacted in accordance with the recommendations for "Structural Fill". Cut Slopes: All permanent cut slopes should be made no steeper than 2:1 (h:v). Existing trees located within 10 feet of the top of the cut slope should be cut but stumps should be left intact. Utility Trenches: Buried utility conduits should be bedded and backfilled around the conduit in accordance with the project specifications. Where conduit crosses pavement subgrade areas the backfill above the pipe should be placed and compacted in accordance with the recommendations for structural fill. Street Subgrade Preparation The street pavement section (base course and A.C. paving) should be supported on a subgrade compacted to at least 95 percent of the ASTM D1557 maximum dry density. Subgrade preparation should include stripping of existing vegetation, topsoils and soft/loose weathered soils in accordance with the "Site Preparation" recommendations. Where unsuitable soils exist at subgrade level, subgrade preparation should include over -excavation down to expose stiff to very stiff/hard natural soils and placement of structural fill to final subgrade elevation. Subgrade fill should be placed in accordance with the recommendations for structural fill except that the top 6 inches Project No. 98-103-01 Page 6 Happy Valley Land Co. February 10, 1998 of the subgrade fill should be compacted to at least 95 percent of the ASTM D1557- 91 maximum dry density. Residential Spread Footing Foundations Conventional spread footings founded on undisturbed very stiff/hard natural soils should provide good support for residential structures within the proposed plat. All footings should be founded at least 18 inches below the lowest adjacent final grade and should be deepened as required to penetrate existing soft/loose natural soils and fill to bear on very stiff/hard natural soils. In addition, square footings and continuous footings running parallel to the slope should be deepened as required to provide a set back at least 12 feet horizontally from the face of the slope. Footings should also be setback beyond a 1:1 (h:v) projection from adjacent lower footings. All footings should be stepped as necessary to maintain a horizontal bearing surface. Suitable very stiff/hard bearing soils are expected to be at depths of about 2 to 3 feet below the natural surface. The depth to bearing soils may be increased due to existing fill overlying the natural surface. As an alternative to deep spread footings to penetrate soft/loose soils or fill and/or satisfy slope setback requirements, foundation loads may be transferred from the recommended minimum foundation depths to the recommended bearing soils by a monolith of lean concrete having a minimum compressive strength of 1000 psi. The width of an unreinforced lean concrete monolith should be at least as wide as the footing or at least one-half of the monolith height, whichever is greater. Reinforced monoliths should be designed by a structural engineer. A suitable width trench should be excavated with a smooth edged excavator (no teeth) to expose the dense/very dense bearing soils under observation by our office and backfilled as soon as possible with the lean concrete to the footing elevation. Square footings should be at least 24 inches wide and continuous wall footings should be at least 16 inches wide for two story structures. Continuous footings for garages or other light structures with loads less than 1 kip/ft may be reduced.to a minimum width of 12 inches. Footings may be designed based on an allowable bearing pressure of 2000 psf. Settlement of light wood -frame structures is expected to be within tolerable limits for this type of construction. For example, the estimated settlement of a 16 inch wide continuous footing founded on very stiff/hard natural soils and carrying a load of 2 kips/ft. is on the order of 1/2 inch. Settlements are expected to occur primarily during construction. For lateral design, resistance to lateral loads can be assumed to be provided by friction acting at the base of foundations and by passive earth pressure. A coefficient of friction of 0.35 may be assumed with the dead load forces in contact with onsite soils or structural fill. An allowable static passive earth pressure of 250 psf per foot of depth may be used for the sides of footings poured against undisturbed natural soils or properly compacted structural fill. The bearing values indicated above are for the total dead load plus frequently applied live loads. If normal code requirements are applied for design, the vertical bearing values may be increased by 50% for short durations of loading which will Project No. 98-103-01 Page 7 Happy Valley Land Co. February 10, 1998 include the effects of wind or seismic forces. Allowable lateral passive pressures may be increased by 33% for wind and seismic forces. Retaining Walls Cantilevered retaining walls as referred to in this report are walls which yield or move outward during and after backfilling. Actual wall movements will depend on the wall design and method of backfilling and can range from 0.1% to 0.3% of the wall height. Design pressures for cantilevered walls given below assume that the top of the wall will deflect at least 0.2% of the wall height. Static design of permanent cantilevered retaining walls which support a horizontal surface of properly compacted clean free -draining granular material may be based on an equivalent fluid density of 35 pcf. This pressure assumes that there is no water pressure behind the wall. A uniform lateral pressure due to backfill surcharge should be computed using a coefficient of 0.25 times the uniform vertical surcharge Toad. Static design of walls structurally braced against movement should be based on an equivalent fluid density of 60 pcf. This pressure assumes that the wall supports a horizontal backfill of properly compacted free -draining (imported) granular material and that there is no water pressure behind the wall. Uniform lateral pressure due to a uniform vertical surcharge behind a braced wall should be computed using a coefficient of 0.45 times the uniform vertical surcharge load. Seismic design of retaining walls should include a dynamic soil loading based on a 0.24g 475 -year UBC recurrence ground motion level. Dynamic soil pressure should be assumed to have an inverted triangular distribution. The dynamic soil pressure at the top of the wall should be at least 20H (psf) where H is the height of the wall above the footing base. The dynamic soil pressure should diminish linearly to zero at the base of the wall. Combined static plus dynamic soil pressure should be used for seismic design of the walls. Care should be exercised in compacting backfill against retaining walls. Heavy equipment should not approach retaining walls close enough to intrude within a 1:1 line drawn upward from the bottom of the wall. Backfill close to walls should be placed and compacted with hand -operated equipment. Recommendations for placement and compaction of structural fill are presented under "Site Grading". Design wall pressures given above assume no water pressure behind the walls. We recommend that a drainage zone be provided behind all retaining walls and a adequate drain system be provided at the base of all retaining walls. As a minimum, the drainage zone horizontal dimension should be 3 feet or 1/2 the wall height, whichever is less. Backfill within the drainage zone should be a clean sand/gravel mixture with less than 5 percent fines based on the sand fraction. A membrane of Mirafi 140 filter fabric or equivalent should be provided between the drainage zone material and onsite silty soil backfill. Wall drains should consist of a four -inch diameter perforated PVC drain pipe placed in at least one cubic foot of drain gravel per lineal foot along the base of the wall. Drain gravel should be washed material with particle sizes in the range of 3/4 to 1-1/2 inches. The drainage zone backfill should be capped with paving or 12 inches of silty soils to reduce surface water infiltration. Project No. 98-103-01 Page 8 Happy Valley Land Co. February 10, 1998 Conventional spread footing foundations founded on undisturbed very stiff/hard natural soils may be used for support of retaining walls. Design of wall foundations should be in accordance with the recommendations presented in this report. Drainage Control Surface drainage from the adjoining upslope areas should be controlled and diverted around the development area in a non-erosive manner. Adequate positive drainage should be provided away from the structure and on the site in general to prevent water from ponding and to reduce percolation of water into subsoils. Granular backfill should be capped with paving or 6 inches of onsite silty soils. A desirable slope for surface drainage is 2% in landscaped areas and 1% in paved areas. Roof drains should be tightlined into the storm drain system or other appropriate discharge point (no discharge on the ground surface). A permanent perimeter drain, independent of the roof drain system, should be placed adjacent to the base of the continuous exterior foundations. The drain should consist of a four -inch diameter perforated PVC drain pipe placed in at least one cubic foot of a well graded sand and gravel filter material per lineal foot along the base of the foundations. At least one interior drain should be provided beneath the basement floor connecting to the perimeter drain on the downslope side at the lowest point. If conditions exposed during construction warrant, interceptor subdrain system(s) may be required to intercept ground water migration form the upslope areas particularly in the eastern site area. Interceptor drains should consist of a filter fabric lined trench filled with clean sand or drain rock with a perforated PVC drain pipe at the base. The drain trench should be at least 18" wide, and at least 3 feet deep and should penetrate at least one foot into the very stiff/hard natural glacial till soils. Six inches of native clay soil cover should be placed over the drain to reduce surface water infiltration. Discharge from the subdrain should be conducted via tightline to the storm drain system. In the proposed street subgrade structural fill areas a drain pipe should be installed to collect ground water infiltration which may collect in the fill and transmit it to the storm drain system. The subdrain pipe should be placed along the lower side of under the street fill areas and should discharge to the storm drain system. As a minimum the drain should consist of a 4" diameter perforated PVC collector pipe and a tightline discharge pipe. Additional lateral drains should be provided wherever a spring or seep is exposed during grading. Erosion Control Onsite silty materials are expected to be highly erodible when exposed to concentrated flows. Siltation fences or other detention devices should be provided around soil stockpiles and exposed soil areas during construction to control the transport of eroded material. Exposed final graded soil areas should be paved or planted immediately with grass and deep rooted plants to help reduce erosion potential. Project No. 98-103-01 Page 9 Happy Valley Land Co. February 10, 1998 Plan Review This report has been prepared to aid in the evaluation of this site and to assist the civil engineers in the design and construction of the project. It is recommended that this office be provided the opportunity to review the final design drawings and specifications to determine if the recommendations of this report have been properly implemented and to make any supplemental design recommendations which may be required. Observations and Testing During Construction Recommendations given in this report are based on the assumption that all development construction will be performed under engineering observations and testing. All structural fill and backfill areas should be observed by a representative of this office after stripping and prior to placing fill. Proper fill placement and compaction should be verified with field and laboratory density testing by a qualified testing laboratory. All footing excavations should be observed prior to placement of steel and concrete to see that footings are founded on satisfactory bearing materials and have proper slope setback. CLOSURE This report was prepared for specific application to the subject site and for the exclusive use of the Happy Valley Land Company and their representatives. The findings and conclusions of this report were prepared with the skill and care ordinarily exercised by local members of the geotechnical profession practicing under similar conditions in the same locality. We make no other warranty, either express or implied. Variations may exist in site conditions between those described in this report and actual conditions encountered during construction. Unanticipated subsurface conditions commonly occur and cannot be prevented by merely making explorations and performing reconnaissance. Such unexpected conditions frequently require additional expenditures to achieve a properly constructed project. If conditions encountered during construction appear to be different from those indicated in this report, our office should be notified. Respectfully submitted, GEOSPECTRUM QONSULTANTS, INC. 0-e/P1111 James A. Doolitt Principal Engineer Encl: Figures 1 and 2 Appendix A Dist: 1/Addressee 2/Baima & Holmberg, Inc. Project No. 98-103-01 Oolg Page 10 ref: Preliminary Geologic Map of Seattle and Vicinty, Washington, by Waldron, Liesch, Mullineaux and Crandell, USGS Map I-354, 1962, scale: 1"=2640' • SITE VICINITY GEOLOGIC MAP GEOSPECTRUM CONSULTANTS, INC. Gaatachn/co/ EngInaar/ng anal Earth Sc/®nays Proposed Foster Heights Development South 146th Street & 51st Avenue South Tukwila, Washington Proj. No98-103 Date 2/98 Figure 1 APPENDIX A FIELD EXPLORATION Our field exploration included a site reconnaissance and subsurface exploration program. During the site reconnaissance, the surface site conditions were noted, and the locations of the test pits were approximately determined. The test pits were approximately located using existing features as a guide. Elevations at the test pits locations were estimated from the site plan prepared by Baima & Holmberg dated 9/12/97 combined with our own site measurements. Test pits were advanced using a Yatani 140-B trackhoe excavator. Soils were continuously logged and classified in the field by visual examination, in accordance with the ASTM Soil Classification system. Logs of the test pits are presented on the test pit summary sheets A-1 through A-3. The test pit summaries include descriptions of the soils and pertinent field data. Soil consistency and moisture conditions indicated on the logs are interpretations based on the conditions observed in the field. Boundaries between soil strata indicated on the logs are approximate and actual transitions between strata may be gradual. TEST PIT NO. 1 Logged By JAD Date 1/23/98 Elev 464' Depth W (ft lows USCS Soil Description (%) 0 1 - 2 — 3 — 4 — 5 — 6 ML Topsoil/Organics Sandy Swioccygravelfto 4 and grading to Sandy Silt, very fine sort to firm yew ttm to hard moist wet ver. most dk brn mottled Drwn ret -brown 29.8 Seepage difficult dig ing 7 – - Maximum depth 6 feet. Seepage at approximately 1 foot. TEST PIT NO. 2 Logged By Date 1/23/98 Elev. 448' 1 — 2 — 3 — 4 — 5 — 6 ML Topsoil/Organics w/abundant roots to 1/2" Sandy Silt, very fine w/°cc. rounded gravel to 4 soft firm stiffi to very stiff hard very moist wet — — very moist gown mottled Drain brown 23.7 _Seepage difficult digging 7 — Maximum depth 6 ft. Seepage at approximately 2 feet. GEOSPECTRUM CONSULTANTS, INC. Gootochn/co/ Enginooring and Eorth Sc/oncoa TEST PIT LOGS Proposed Foster Heights Development South 146th Street & 51st Avenue South Tukwila, Washington Proj. No.98-1031 Date 2/98 Figure A-1 Logged By JAD Date 1/23/98 Depth (n,Plows USCS 0 1 — 3 4 — TEST PIT NO. 3 Soil Description Bev. 422' w (%) Topsoil/Organics ML Sandy Silt very i ra el to 3" w/trace clay soft firm sty to hard moist wet very -moist dk brn ra - roWn mottled D • v - r n re -brown 40.6 — Seepage 5 — 6 — 7 — Maximum depth 4.5 feet. Seepage at approximately 1 - 2 feet. TEST PIT NO. 4 Logged By .L4,12._ Date lan— Date 1/23/98 Elev. 423' 1 — 2 — 3 — 4 — 5 — 6 Topsoil/Organics SM Silty very fine Sand w/ occ. gravel to 3" loose medium dense SP SM Sand, fine-med dense moist to very moist ry moist wet Silty fine Sand v.dense v.moist dark brown town . groin mottled Drown Drown gray gray-brn 19.1 24.1 =CCaving — ,LSeeaa�e 7 — Maximum depth 6 ft. Seepage at approximately 4.5 - 5. 5 feet. GEOSPECTRUM CONSULTANTS, INC. .ate 7. A 600tochn/col Enp/nooNnp and Eorth Sc/oncoa TEST PIT LOGS Proposed Foster Heights Development South 146th Street & 51st Avenue South Tukwila, Washington Proj. No98-103 l Date 2/98 1 Figure A-2 Logged By JAD Date 1/23/98 Depth ot.plows USCS 0 1 — 2 — 3 — 4 TEST PIT NO. 5 Soil Description Bev428' W (%) Topsoil/Organics w/abundant roots to 1" ML Sandy Silt, very fine & occ gravel to 3" & Silty fine Sand soft firm %para moist to wet wet very moist dark brown Drown gy brown 37.3 17.1 . C.aving_� Seepage 5 — 6 — 7 — Maximum depth 4 feet. Seepage at approximately 1.5 - 2. 5 feet. Loi Dai 0 1 2 3 5 6 7 Iged e TEST By -.IAD— 1/23/98 PIT NO. 6 408' Eiev — — — — — — Topsoil/Sod ve y i�000se wet dk-brn 30.4 20.5 FILL t / 111%becomes Sandy Silt/Silty fine Sand ixed rn It-brn . r brown very moist k brn X rbern — avT — _ _ more SaTcn y medium -- _ densedense ggrray & red-brn _ Maximum depth 5 ft. Water at 9 inches after 15 minutes. GEOSPECTRUM CONSULTANTS, INC. Gootochn/co/ Eng/noor/ng and Eorth Sc/oncos TEST PIT LOGS Proposed Foster Heights Development South 146th Street & 51st Avenue South Tukwila, Washington Proj. No98-1031 Date 2/98 Figure A-3 -4 aN 0 0 0 N- 8752'34' W 126.11' 12 126" 13 i 126' 144. 25' ▪ N 8751'26. W 'vim 189.46' 76' 99' 1 15' 0 nv n c 0 cc 20' TP- � r 1" = 60' L___X15` EASEMENT drainage/se'epage N 8T53/'4�'Wo X189.29' 20' s, ROAD A 0 N 93' 0 TO BE, RELIaVED. r? 126' TP -61 2 40' 4^` u . 51' 411 1 Tp -1 63' 0 63' TP- I Ha 0 0 N61274re ref: Preliminary Plat Map by Baima & Holmberg Inc. dated 9/12/97, reduced scale 1” = 60' 189.20' N 8754'50" W 189.11' :1 0 n 0 J ) :0 z 20° i` y b 4> SITE EXPLORATIONS PLAN GEOSPECTRUM CONSULTANTS, INC. Gaotochnlco/ Enpineo /ng and Eorth SCienooa 11 X 17 PRINTED ON NO. 1000H CLEARPRINT • /6-Proj. No.98-103 Date 2/98 Figure 2 Proposed Foster Heights Development South 196th Street & 51st Avenue South Tukwila, Washington City of Tukwila Pre -Application Process MEETING ATTENDANCE RECORD City of Tukwila Department of Community Development - Building Division Phone: (206) 431-3670 6300 Southcenter Boulevard, #100 Tukwila, Washington 98188 Pre -Application File Number PRE97-040 Project: FOSTER HEIGHTS SUBDIVISION Meeting Date: 10/9/97 Time: 2:30 P.M. Site Address: 51 AV S & S 144 ST Date Checklist Mailed: 10/17/97 By: KELCIE J, PETERSON , CITY STAFF PRESENT DEPARTMENTS PHONE #'s NAMES/TITLES X X X X X Building Fire Planning Public Works Parks & Rec Police Environmental Permit Center Other: CONTACT 431-3670 575-4404 431-3680 433-0179 433-1843 433-1804 431-3662 431-3670 DUANE GRIFFIN, BUILDING OFFICIAL NICK OLIVAS, ASSISTANT CHIEF VERNON UMETSU, ASSOCIATE PLANNER JOANNA SPENCER, DEVELOPMENT ENGINEER KELCIE J. PETERSON, PERMIT COORDINATOR APPLICANT/REPRESENTATIVES PRESENT Name: MIKE BUDNICK Phone: 425 392-0205 PERSON Company/Title: BAIMA & HOLMBERG INC Street Address: OTHERS Name: 100 FRONT ST S City/State/Zip: ISSAQUAH WA 98027 RICHARD SCHROEDER Phone: 425 392-2742 PRESENT Company/Title: Street Address: PO BOX 1324 Name: City/State/Zip: ISSAQUAH WA 98027 Phone: Company/Title: Street Address: City/State/Zip: Name: Phone: Company/Title: Street Address: City/State/Zip: Name: Phone: Company/Title: Street Address: City/State/Zip: Name: Phone: Company/Title: Street Address: City/State/Zip: • • City of Tukwila Pre -Application Process MEETING ATTENDANCE RECORD City of Tukwila Department of Community Development - Building Division Phone: (206) 431-3670 6300 Southcenter Boulevard, #100 Tukwila, Washington 98188 Pre -Application File Number PRE97-040 Project: FOSTER HEIGHTS SUBDIVISION Meeting Date: 10/9/97 Time: 2:30 P.M. Site Address: 51 AV S & S 144 ST Date Checklist Mailed: By: CITY STAFF PRESENT DEPARTMENTS PHONE #'s Building Fire Planning Public Works Parks & Rec Police Environmental Permit Center Other: CONTACT PERSON OTHERS PRESENT 431-3670 575-4404 431-3680 433-0179 433-1843 433-1804 431-3662 431-3670 NAMES/TITLES utoulko tV) iJ t - lJ c JA -6 7 Acsi 1/En-two VM G -rcu j As co C, Pcnl2 C10Yv 5P cE7,0e0eLOPREIV%ElV6//u, A Per cr) Per )l orzre-J APPLICANT/REPRESENTATIVES PRESENT Name: M //a: 13 6/,D /I / UC Company/Title: 13ActMA 4 40c_meE r -..,(NC., 7?acr COOiL�( Street Address: too F -2o Nrr 5 Z -.,_S City/State/Zip: 1 SSS-Qu!}(i- � (,)& -' go z7 Name: c L.auld jc W?_c4-61Phone: 4"Zg- 59Z 279 Z Company/Title: Phone: (425) 39 Z -02,50 Street Address: p. 0, 6,54 / 3 / City/State/Zip: S,;zyci ;/ :',5t/ %Ace/ Name: Phone: Company/Title: Street Address: City/State/Zip: Name: Phone: Company/Title: Street Address: City/State/Zip: Name: Phone: Company/Title: Street Address: City/State/Zip: Name: Phone: Company/Title: Street Address: City/State/Zip: • • PRE'77_ ()Li() Fof)kr /VS 9u6e-1i O's/o/r) cf bucoC_ t)a//5 2-./n01)-/-16. I ii fs Wok( fiVollabili. c5evjer //i4 Hydr0nts._.. --7D(r)ctra,tno.( ahiic Wcil-� �- (Thtfli'7C, - }7(on .i -o_ i _ �m -C-aea-�cn Z'xjWri/-ram51--te <Di5-10: �c'c,l'� 5i S r�✓�/J'Ien L s �uiuu?�l Pre -Application Checklist CITY OF T UKWILA Department of Community Development Building Division -Permit Center 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 PRE -APPLICATION FILE NO. PRE97-040 PROJECT: Foster Heights MEETING DATE/TIME: 10-9-97 @ 3:30 SITE ADDRESS: 4900- South 146th Street •following Cmmen ditional information mays be heetle4 s are based on a preliminary review . U Other requirements/regulations may4 needto be met: BUILDING DIVISION b(d no -La -We -rid' The following is meant to be general information related to the requirements of the Tukwila Building Division for the processing of building permits. Specific code issues will be addressed through the normal plan review process after the permit is applied for. ® 1. Comply with the Uniform Building Code, 1994 Edition, as adopted and amended by the State (Table 10- B, Section 1607, and Section 3003 of the 1994 UBC are not adopted). 2. Comply with the Uniform Mechanical Code, 1994 Edition, as adopted and amended by the State. 3. Comply with the Uniform Plumbing Code, 1991 Edition, as adopted and amended by the State. 4. Comply with the Washington State Energy Code, Chapter 51-11 WAC, 1995 Edition. Energy code specifications artd data must be included on the building plans. 5. Comply with Washington State Regulations for Barrier Free Facilities or Design (State amendment replaces UBC Chapter 11 in its entirety). 6. Apply for and obtain the following Building Division permits and approvals through the Department of Community Development Permit Center: • Building Permit • Rack Storage • Other: • Mechanical Permit • Demolition (building) ® 7. All applications and plan submittals must be complete in order to be accepted by the Permit Center for plan review. Use the Plan Submittal Checklist provided on the reverse of the application forms to verify that all the necessary materials and information has been supplied. 8. Plans submitted for approval must be stamped by a Washington State licensed architect or engineer and shall specifically contain the name of the person designated as the architect or engineer of record for the project. This person shall be responsible for reviewing and coordinating all submittal documents prepared by others, including deferred submittal items, for compatibility with the design of the building. (See UBC Sec. 106.3.4) 9. Temporary erosion control measures shall be included on plans. Normally, no site work will be allowed until erosion control measures are in place. 10. Rockeries are not permitted over 4' in height. Retaining structures over 4' in height must be engineered retaining walls, and require a separate building permit. 11. All rack storage requires a permit and rack storage over 8' high must be designed for Seismic Zone 3. A Washington State structural engineers stamp will be required on plans and structural calculations submitted for rack storage over 8' high. —tl 12. Construction documents shall include special inspection requirements as specified in UBC Sections 106.3.5 and 1701. The architect or engineer's inspection program required by Section 106.3.5 shall be included with plan submittal documents when permit application is submitted. Notify the Building Official of testing lab hired by architect or owner prior to permit issuance date. The contractor may not hire the testing lab. El 13. Structural observation shall be required as specified in UBC Section 1702. 14. Construction documents shall -contain soils classification information specified in Table 18 -I -A of the Uniform Building Code on the copies stamped and signed by Washington State licensed architect or engineer in responsible charge of the structural design work. r,. -15. Separate demolition permits are required for removal of any existing buildings or structures. i 16. Comply with UBC Appendix Chapter 12, Division II - Sound Transmission Control. 17. Addresses are assigned by the Tukwila Fire Prevention Bureau. •17. Addresses are assigned e Tukwila Fire Prevention Bureau. '• Pre -Application Checklist BUILDING DIVISION Page 2 18. Obtain approvals and permits from outside agencies: ❑ ELEVATORS are regulated by State Department of Labor and Industries. Permits and inspections for elevators are obtained through the elevator section of that agency (reference RCW Chapter 70.87). Phone (206) 248-6657. ❑ ELECTRICAL PERMITS AND INSPECTIONS are obtained through the Department of Labor and Industries. Phone (206) 248-6630. ❑ PLUMBING PERMITS AND INSPECTIONS are obtained through King County Health Department. Inspections: (206) 296-4732; Permits: (206) 296-4727. ❑ King County Health Department must approve and stamp plans for PUBLIC POOLS/SPAS and FOOD SERVICE FACILITIES prior to submittal to the Tukwila Building Division. Phone (206) 296-4787. ❑ FIRE PROTECTION SYSTEMS plans are reviewed through the Tukwila Fire Department. Phone: (206) 575-4404. ❑ 19. ❑ 20. Checklist prepared by (staff): Date: It is anticipated that new code editions will be adopted by the State and City effective July 1, 1998. The code that is in effect at the time of permit application will govern. itional information may be needed ' ther'requirements/regulations mayneed to be met. ENVIRONMENTAL 1). The majority of the site appears have slope areas less than 20 percent in gradient and are not regulated by the Sensitive Areas Ordinance (SAO). A professional topographic survey is required for the entire site to determine site gradients. Areas of Potential Geologic Instability are addressed in the Ordinance which is Section 18.45.080 E. of, the Tukwila Municipal Code (TMC). 2) As part of project review a geotechnical investigation may be required to demonstrate the feasibility of the project and to determine adequate building design. On-site grading may affect slope stability and groundwater movement. 3) Only the slope areas 20 percent or greater in gradient that are cleared fordevelopment will be subject to the Tree Ordinance (Tree Regulations - TMC Chapter 18.54). A required landscape plan will consist of tree retention and tree planting per the standards of the Ordinance. Tree replacement is required for those greater than 4 inches in diameter at breast height (DBH) except for black cottonwood trees. hy • • Fire Department Access Road With Cul -de -Sac Turn -A -Round U.F.C. Division 11 Sec. 10.201-10.206 City Ord. #1632 SCALE: 1/16" = 1' Pre-pplication CheCist CITY OF TUKWILA Department of Community Development Building Division -Permit Center 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 e followm dihona information may comments are based "on a, preliminary review e needed Other requirements/regulations may need to be met FIRE •DEPARTMENT - Construction Information The City of Tukwila has adopted the 1994 Uniform Fire Code. This and other nationally recognized standards will be used during construction and operation of this project. 2. Fire hydrants will be required. (City Ord. #1692) 3. Required fire hydrants shall be approved for location by the Fire Department, approved for purity by the Water Department, and fully in service prior to start of construction. By line of vehicular travel a fire hydrant must be no further than 150 feet from a structure; and no portion of a structure to be over 300 feet from fire hydrant. (UFC 903 and City Ord. #1692) 4. Automatic fire sprinklers, audible and visual devices, and a minimum of one pull station per floor are required for this project. Sprinkler system and fire alarm shall comply with N.F.P.A. #13, #72, and ADA requirements. Sprinkler plans shall be submitted to Washington State Surveying and Rating Bureau, Factory Mutual or Industrial Risk Insurers for approval prior to being submitted to Tukwila Fire Marshal for approval. The fire alarm plans are to be submitted directly to the Tukwila Fire Marshal for approval. Submit three (3) sets of drawings. This includes one for our file, one for company file, and one for the job site. (City Ord. #1742) 5. Maximum grade is 15% for all projects. El 6. Hose stations are required. (City Ord. #1742) ri 7. A fire alarm system is required for this project. (City Ord. #1742) Plans shall be submitted to the Tukwila Fire Marshal for approval, prior to commencing any alarm system work. Submit three (3) sets of complete drawings. This includes one for our file, one for company file, and one for the job site. 8. Special installations of fixed extinguisher systems, fire alarm systems, dust collectors, fuel storage, etc. require separate plans and permits. Plans to be submitted to the Fire Marshal prior to start of installation. (UFC 1001) 9. Portable fire extinguishers will be required in finished buildings per N.F.P.A. #10. (Minimum rating 2A, 10 BC) Li 10. Buildings utilizing storage of high piled combustible stock will require mechanical smoke removal per Section 81 of the 1994 UFC. El El �.�' 11. During construction, an all-weather access will be required to within 150 feet of the building. (UFC 902) 12. 12. No building will be occupied, by people or merchandise, prior to approval and inspection by Fire and Building Departments. 13. Adequate addressing is required. Fire Department will assign all new addresses. Number size will be determined by setback of building from roadway. Four inch numbers are minimum. Numbers will be in color which contrasts to background. (UFC 901.4.4) 14. Designated fire lanes may be required for fire and emergency access. This requirement may be established at the time of occupancy and/or after the facility is in operation. (UFC 901.4) I 15. Special Fire Department permits are required for such things as: storage of compressed gas, cryogens, dry cleaning plans, repair garages, places of assembly, storage of hazardous materials, flammable or combustible liquids or solids, LPG, welding and cutting operations, spray painting, etc. (UFC 101) L✓� 16. Fire Department vehicle access is required to within 150' ofany portion of an exterior wall of the first story. Fire Department access roads in excess of 150' require a turn around. Fire Department access roads shall be not less than 20' wide with an unobstructed vertical clearance of 13'6" (City Ord. #1741). 17. Adequate fire flow availability will need to be demonstrated for this project. [1 18. Checklist prepared by (staff): Date: /#7 Pre -plication Chelist CITY OF TUKWILA Department of Community Development Building Division -Permit Center 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 e following comments are based on a preliminary revuew ditional information may' be needed. 'Other °requirements/regulations ma 1. CI 2. 3. 4. U 5. 6. ln� 7. 8. FIRE DEPARTMENT - Inspections Overhead sprinkler piping a. Hydrostatic test b. Trip test c. Alarm system monitoring test Underground tank a. Location b. Distance between tanks c. Distance to property line d. Depth of cover Fire alarm a. Acceptance test b. Fire Dept. approved plans Hood and duct inspections a. Installation b. Trip test Spray Booth a. Location b. Fire protection c. Ventilation d. Permit Flammable liquid room a. Location b. Fire protection c. Permit Rack storage a. Permit b. Mechanical smoke removal c. Rack sprinklers d. Aisle width Fire doors and fire dampers a. Installation b. Drop testing 9. Fire final a. Fire Dept. access b. Building egress and occupancy load c. Hydrants d. Building address 41.1 10. Other: a. b. c. d. Checklist prepared by (staff): d. Fire Dept. approved plans e. Sprinkler head location and spacing f. Materials and test certificate e. Vent piping, swing joints, fill piping, discharge piping f. Anchoring g. Hydrostatic test h. Separate Fire Dept. approved plans e. Fire (1) (2) (3) (4) (5) (6) protection systems: Halon systems Standpipes Hose Stations Fire Doors Fire Dampers Fire Extinguishers e. f. 9. Date: /9(07 Pre-!pplication Chelist CITY OF TUKWILA Department of Community Development Building Division -Permit Center 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 PRE APPLICATIONi FILE NO. ° :PRE97-040 r PROJECT . 'Foster ";HOTgtit's' e following comments are based on a preliminaryreview ditional information maybe needed Other requirements/regulations may need to be me J7 Duciputha)a PLANNING DIVISION - Land Use Information 1. Comply with Tukwila Municipal Code (zoning, land use, sign regulations, etc.) 2. Obtain the following land use permits/approvals: o El Boundary Line Adjustment/Lot Consolidation Binding Site Improvement Plan Comprehensive Plan Amendment Conditional Use Permit Design Review Design Review -Interurban Environmental (SEPA) Planned Mixed Use Development Planned Residential Development 3. Zoning designation: L i 2 Site located in ia S !b � / 4. Minimum setback requirements: Front: 15 -Jo Sid Fitaot -1" 5. Maximum Building Height: .5O El El Rezone Shoreline Management Permit Tree Permit Short Subdivision Sign(s) Subdivision Unclassified Use Variance Other: sensitive area? ❑ Yes .WNo e: 5 Side: 5- Rear: ( 0 Height exception area? ❑ Yes ).'No 6. Minimum parking stalls required: 2 /owl? Handicap stalls required: 7. J No/ moryth�an 30 of-re�quired parkingsa`Is may be,e pact. N7I�ndscap�,oyerhan /stjlls,.are p rmitted, although no,wheel stops,`prior,to hitting he gurb will,bejequire 8. Minimum landscaping required: Front: 0 Side: Side: 0 cape gI ns ust be stamp ' by a WashJgtort-S r9as �g1ire a lanliscape iirrrigation 'system-(Lifility Permi Roof -top m 10. e//c�hanic' I units,,sat le lite \dishes and s�'milar structures m s properly,scf elevations- nd construction details as,�art o f)uilding permit applicat� sub . ittal.. 111).Trash enclosures and storage areas must be screened to a minimum of 8' in height. Provide elevations and construction details as part of building permit application submittal. 12./�� ding{ ermit�a'ns vt ch dee,te'from,that alre day ppr ved by the and of Ar • - - e ral '-i`ectyi( reapplication for design review approval. 13. Reqi3 S 0-1 (7y TS til b 7-61) A S Lo T A/2 694, 14. tit l K - Co T Al -c4 ,C) _5-0 0 -tiK 15. S F(O w PQ-rey,t T/ A ``b C Y: r't c N T 4 2_01; o7"- 16. 17: 18. 19. 20. Rear: o act? 0 ate licensed lar cape ale itect. All landscape tRequirdi ✓/ Checklist prepared by (staff): VER F(CDhI C.A4 Date: ( 0(M1 7 Pre -application Chteklist CITY OF TUKWILA Department of Community Development Building Division -Permit Center 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 he following comments are based on a preliminary review itional,information may be needed ; Other requirements/regulations may need to be m PARKS AND RECREATION DEPARTMENT Parks and Recreation would like developer to consider a public sidewalk/path from the east end of Road A to 51st Avenue. Similar paths in the City provide access to roads where the construction of a roadway is difficult. Pre -Application Checklist CITY OF TUKWILA Department of Community Development Building Division -Permit Center 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 The following comments are based on a preliminary reiiew:. Additional Information may be needed., Other requirements/regulations may need to be m POLICE DEPARTMENT CRIME PREVENTION SECURITY RECOMMENDATIONS 1. Identity: The addresses for the individual residences should be visible from the street, both in daylight and darkness. Site development which does not properly identify residences will delay emergency responses by police, fire, and aid units. Doors: (a) Entrance doors to residences should be capable of resisting forcible entry equal to a wood, solid core door, one and three-fourths inches thick. (b) Every entrance door to an individual housing unit should have a keyed, single -cylinder, one -inch deadbolt lock. The lock should be constructed so that the deadbolt lock may be opened from the inside without the use of a key. Glass windows should be more than 40 inches from the lock. (c) The entrance doors should have visitor observation ports also known as viewers with 180 visibility. 3. Orientation of Windows: Windows should be located so that areas vulnerable to crime can be easily surveyed by individuals inside the residence. 4. Landscaping: Plant materials should be placed and maintained so to provide visibility and prohibit hiding places for unauthorized people around ground level door and window areas. Sticker shrubs may discourage crime activities. Low shrubs and umbrella trees (where the canopy is maintained above five(5) feet from the ground) will allow surveillance opportunities, hence reducing the potential for criminal behavior. 5. Lighting: Energy efficient security lighting is a relatively low-cost, yet extremely effective way to protect the homeowners and their visitors. 6. Garage Parking: Theft from vehicles and stolen vehicles in residential parking areas are very common. Recommend during the planning stage that consideration be given to providing garage parking for resident's vehicles. Checklist prepared by T. Kilburg (242-8084) 10/7/97 Pre-Anlication Checist CITY OF TUKWILA Department of Community Development Building Division -Permit Center 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 PRE -APPLICATION FILE NO: '' PRE97.'040 MEETING DATE/TIME 10-9-97.@ 3:30 PROJECT: FosterxHei'ghts'`` SITE:: ADDRESS:. 4900 South 146th Street e following comments are based.on a preliminary review. ditional information may be needed. Other requirements/regulations may need to be met. PUBLIC WORKS DEPARTMENT 7W Project • r. -0.5.7g N616HFS... Address :44'100 S..1�/P 5T .. pW## Date : /O/QDT 97By : �O6U.'YI-a- 510 E ,Pre-ApP 7-OtOSEPA Shortplt BLA Shoreline BAR ROW Vacation ..... Permits REVIEW COMMENTS: Availability Letters: .. Water .. Sewer lib 125. 1. Water :.Ch6C . 41)/ GOD '`/2-s' VALvEu grWeeOis-re ... Assessment ... Double Detector ..V Fire Loop/Hydrant ... Proportionate Fair Share/No Protest Water Agreement 2. Sewer :.Cf.67..IW/.1441 L. (JL4- . Proportionate Fair Share/No Protest Sewer Agreement . Grease Interceptor designed to Uniform Plumbing Code Appx. H i Surface Water • SEE /47%996W 4=.0 Identify drain system condition for 1/4 mile downstream. Design to KC Design Manual AND 'Mao. Sul2.FAc.E /,vA.TER. Mo}/w44EMFrNT OQi), • Biofiltration or Coalescing Plate Separator ... Riverbank Stabilization - 4. Hydrological/Geotech:.Ol .au//.2.O -- 5EE 47779C/1 5. Traffic: .$/CHT 0/STANCE 577.4OY FOR 55'. /41.;7iS7 A-Np S1 srA 6. 5 . Trip generation & Distribution for AWDT, & AM, noon, PM peaks Channelization/access: Frontal/Sidewalk: (TMC11 . 64 . 020 rgmnt for: 25, 000 ft, 259,5 of value, or $250,000) ii. c-& Treeplan : .5.7 '6r TREa.5 A t G2'.6. . .X . Undergrounding : 4tL. Gl%![r!!�IE.3- ..�H!9GL. QE' PLRCF� LIN �oc�!llD . X. Curb cut/Access :.k.W5./OE' 7?/34 . D 4'/ 14//0 h9 /1- /V 2c frMAX 5WPE -I 4X 6. R/W-Easements • ! /5 %'o, 7. Developer's Agreement - 8. Turnover: REQL1.11?E4. fro.e.,4/VY. J&./C../NFR $?.e.U.c7 e— ?4%3 9. Other: ,5T/eT. 1...J6i'71N6 All maps & plans to use NGVD datum. PERMITS TO BE OBTAINE • . N! Water: 14/40. 1Z5.. (7U/w/ . 4:. s5// .4 R. E V/W THE PLA 's ,4s 4 'c.[,/l H2O Meter -Exempt ... H2O Meter -Permanent ... H2O Meter -Temp. Landscape Ir�r�iggation . 'V Sewer: ll�°rL. V (.L� . �a!2 DlS71.e. `14e404/} .Sf1ii4 4 .RE!(/ :4 IE4A!US..�4 GJ64 [) ... Side Sewer ... Sewer Main Ext (Private/Public) Metro Business Declaration Form .. Metro Discharge .VLandAltering: 3PPCIF.Y /0M1041 NT- 01.7 CLQ YO S. Pf. GLIT. k4N,O .0.44 ▪ Drainage• • FZC: Floor Elevation- ... Street Use • levation:...StreetUse• .NI' Hauling: $2,000Bond, $1,000,000 Ins., Route Map & $25 Fee Req'd ...Oversize Load $5,000Bond, $1,000,000 Ins.Bus.Lisc./$50 Fee, Route Map, $25 Fee .\/. PSAPCA (demolitions) : ?B, u/.Q O .Dee-cmai-i6,0 ,iS/1 DATE: City of Tukwila John W. Rants, Mayor Department of Public Works Ross A. Earnst, P. E., Director October 7, 1997 : Foster Heights PRE97-040 1) Geotechnical/Hydrological analysis - steep slopes aid -erosion including temporary and permanent erosion control measures. Analysis shall include the following: A. Slope stability B. Recommend how roof and foundation drains should connect. C. Provide for water quality per King County Surface Water Design Manual. D. Detention - regional E. Address any wetlands F. Recommendations for construction of public roads and utilities G. Recommendations for phasing and timing of construction H. Recommendations on schedule for geotechnical inspections I. Recommendations for inspector J. Recommendations for capping/abandonment of wells. 2) Level 1 downstream analysis Note: Drain capacity issues downstream. Lack of storm drain system in s 146th Street. Storm drainage system needs to be developed to 51st with a detention facility. 3) Show all public, private, and common utilities. 4) Show all building pad elevations. All buildings get access equal to or less than 15% per Public Works standards. 5) Show all rockeries and retaining walls. Maximum rockery height is four feet (4'). 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: (206) 433-0179 • Fax. (206) 431-3665 OWNER HAPPY VALLEY LAND.CO: PREPARED BY PROJECT FOSTER HEIGHTS • SHEET CONTENT PRELIMINARY PLAT Baima & Holmberg Inc. 'ENGINEERSS & S U R V.EY O R 5- 100 FRONT STREETSOUTH ISSAQUAH. WASHINGTON 88027 (208) 382.- 0250 . DESIGNED BY DRAWN BY CHECKED BY WSH'. RE41SE0 LOT'LAYOUT UNHZIWZ",,,/alig REV. NO. MSH• YJR 8/28/88 DESCRIPTION BY CHK ' DATE 103.09' OWNER • HAPPY.VALLEY.LAND CO. PREPARED BY Baima & Holmberg" Inc.' PROJECT" FOSTER HEIGHTS •SHEET CONTENT PRELIMINARY PLAT ENC I N E E R S,B. SV 100 FR002 9T9EE'SOUTH . 13500200.. 11A9HIrGTOR 96027'(2061 392 DESIGNED BY DRAWN BY. 'CHECKED • BY. .414332 3T0, - OPAL L13rog REVISED 101 109001 REV. NO. 'DESCRIPTION AASH BY 7.61 CHK LATE