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08-103455CITY OF t Federal Way November 4, 2008 Stephen Bridgeford Sound Engineering 1102 Commerce Street, Suite 300 Tacoma, WA 98402 CITY HALL FILE 33325 8th Avenue South Mailing Address: PO Box 9718 Federal Way, WA 98063-9718 (253) 835-7000 www.cityoffederalway.com RE: FILE #08-103455-00-SE; ENVIRONMENTAL THRESHOLD DETERMINATION Cottages at Redondo, King County Parcels 367440-0140 & 367440-0145, Federal Way Dear Mr. Bridgeford: This office and other City staff have reviewed the environmental checklist you submitted. We have determined that the proposal will not have a probable significant adverse impact on the environment. As a result, an Environmental Impact Statement (EIS) is not required to comply with the State Environmental Policy Act (SEPA). A 14-day comment period is required by the SEPA rules (WAC 197-11-340). A notice inviting comments will be published in the Federal Way Mirror on November 5, 2008. At the end of the comment period, the department will determine if the Determination of Nonsignificance (DNS) should be withdrawn, modified, or issued as proposed. All final determinations may be appealed within 14 days following the comment deadline. No licenses, permits, or approvals will be issued until completion of the appeal period. Our decision not to require an EIS does not mean that the license, permit, or approval you are seeking from the City has been granted. Approval or denial of the proposal will be made by the appropriate administrative or legislative body vested with that authority. The environmental record is considered by the decision maker(s) and conditions will be imposed to reduce identified environmental impacts, as long as the conditions are based on adopted and designated City policy. After a final decision has been made on your proposal (i.e., after a permit has been issued or City Council action taken, as applicable), you may, but are not required to, publish a Notice of Action as set forth in RCW 43.21 C.075. The Notice of Action sets forth a time period after which no legal challenges regarding the proposal's compliance with SEPA can be made. A copy of the Notice of Action form and copies of RCW 43.21C.080 and WAC 197-11-680 providing instructions for giving this notice are available from the Department of Community Development Services. The City is not responsible for publishing the Notice of Action. However, the City is responsible for giving a notice (to parties of record) stating the date for commencing a judicial appeal (including the SEPA portion of that appeal) if your proposal is one for which the City's action on it has a specified time period within which any court appeals must be made. If you need further assistance, please contact Associate Planner Matthew Herrera at 253-835-2638. Sincerely, Ai�t� Greg Fewins, Director Community Development Services enc: DNS Matthew Herrera, Associate Planner Kevin Peterson, Engineering Plans Reviewer Doc, I.D. 47584 -4'k CITY OF •:31 � Federal Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST COTTAGES AT REDONDO Federal Way File #08-103455-00-SE NOTE: The purpose of this final staff evaluation is to provide technical staff evaluation of the proposed action; supplement information contained in the environmental checklist and expanded studies; provide technical information unavailable to the applicant; and correct inaccurate information and recommend measures to the Responsible Official to mitigate identified environmental impacts. Technical reports and attachments referenced herein and in the environmental checklist may not be attached to all copies of this evaluation. Copies of exhibits, reports, attachments, or other documents may be reviewed and/or obtained by contacting the Department of Community Development Services, 33325 8t' Avenue South, PO Box 9718, Federal Way. WA 98063-9718. LIST OF TECHNICAL REPORTS & PLANS The following specialized studies and plans were prepared and submitted for the project action: O Environmental Checklist, signed by Stephen Bridgeford, dated Julyl4, 2008. Site Plan stamped by Timothy Holderman of SEI Inc., dated July 10, 2008. ® Site Distance Analysis performed by Mark Jacobs of JTE, Inc., dated August 27, 2008. 0 Preliminary Grading Plan stamped by Timothy Holderman of SEI Inc., dated July 10, 2008. a Preliminary Drainage & Utility Plan stamped by Timothy Holderman of SEI Inc., dated July 10, 2008. • Details Section Plan stamped by Timothy Holderman of SEI Inc., dated July 10, 2008. • Subsurface Exploration & Geotechnical Engineering Report by Jason Engineering & Consulting Business, Inc., dated December 5, 2005. • Preliminary Technical Information Report prepared by SEI, Inc, revised October 2008. • Topographic Survey prepared by Sadler/Barnard & Assoc., dated February 8, 2008. • Pro -forma Site Plan prepared by SEI, Inc, dated November 22, 2006. ■ Landscape Plan prepared by Medici Architects, dated June 11, 2008. ■ Architectural Plans (sheets A1.0 through 5.1) prepared by Medici Architects, dated January 7, 2008. GENERAL PROJECT INFORMATION Proposed Action: Proposed cottage housing project consisting of eight single-family residential units with associated site improvements on two existing parcels totaling 1.3 acres. Project Name: Cottages at Redondo Final Staff Evaluation for Environmental Checklist Page 1 Cottages at Redondo File 08-103455-00-SE/Doc 1 D 47561 Location: The subject site has not been formally addressed. The affected King County parcels are 367440-0140 and 367440-0145 located near the intersection of 18`h Avenue South and Pacific Highway South. Applicant: John Sawyer of Tom Sawyer Enterprises Lead Agency: City of Federal Way Department of Community Development Services Federal Way Zoning: RS 7.2 Federal Way Comprehensive Plan Designation: Single -Family High -Density Residential SUMMARY OF PROPOSED ACTION AND BACKGROUND The proposed cottage housing development consists of eight single-family residential units; one common house to be shared with residents of the development; three garage structures and parking for 17 vehicles; common open space; on -site stormwater facilities; and associated site improvements. The proposed development will encompass two unimproved single-family residential parcels totaling 1.3 acres. The application is one of three cottage housing demonstration projects authorized for review by City Council Ordinance 08-580. The project action is not categorically exempt from environmental review pursuant to the State Environmental Policy Act (SEPA), specifically the flexible threshold adopted by the City in: Federal Way City Code (FWCC) 18-73(5) "For landfills and excavations up to 500 cubic yards"; and Washington Administrative Code 197-11-800(23)(b) "All stormwater, water and sewer facilities, lines equipment, hookups or appurtenances including, utilizing or related to lines eight inches or less in diameter." STAFF EVALUATION OF ENVIRONMENTAL CHECKLIST The following are responses to the elements of the environmental checklist. Staff has provided a response indicating agreement, clarification, and/or amendment of the applicant's response. A. BACKGROUND 1-5. Concur with the checklist. 6. Projected start of spring 2008 has since passed. Land use, building, and engineering approval must be granted prior to construction. 7-9. Concur with the checklist. 10. Applicant will be required to obtain the following approvals or permits: (1) Threshold Determination; (2) Concurrency Determination; (3) Building Permit; (4) Engineering Approval; and (5) Boundary Line Adjustment. 11-12. Concur with the checklist. Final Staff Evaluation for Environmental Checklist Page 2 Cottages at Redondo File 08-103455-00-SE/nog I A 47561 B. ENVIRONMENTAL ELEMENTS 1. Earth a-c. Concur with the checklist. d. The City's critical areas map indicates a majority of the subject property is within an "Erosion Hazard Area." e-g. Concur with the checklist. h. Applicant will be required to implement a temporary erosion and sedimentation control plan as part of the City's engineering stage of construction permitting. The Public Works Department's Development Standards and the 1998 King County Surface Water Design Manual is expected to provide sufficient mitigation of potential impacts. 2. Air a. Short-term impacts to air quality during construction activity will contribute to carbon monoxide levels through operation of construction machinery, delivery equipment and materials, and worker access to the site by automobile. These activities also involve emissions of hydrocarbons and oxides of nitrogen, potentially elevating the level of photochemical oxidants, such as ozone, in the ambient air. Longer term use -related impacts will vary in level, based on traffic generation and residential fireplaces or wood burning stoves, but are not expected to result in significant adverse impacts beyond that normally associated with a residential -use environment. Long-term impacts, due to automobile emissions, will vary in level according to the amount of traffic generated by future residents and visitors. b-c. Concur with the checklist. Compliance with local, state, and federal air quality standards is expected to provide sufficient mitigation of potential impacts. 3. Water a. Surface 1. Redondo Creek is located approximately 600 feet south of the subject property. The City has designated Redondo Creek a Major Stream. This stream begins at Steel Lake, approximately'/2 mile from the subject property, and eventually flows into Puget Sound. 2. No work will take place over, in, or within 200 feet of the above -referenced surface waters. 3-6 Concur with the checklist. b-c. Ground and Water Runoff (including stormwater) As proposed, the runoff will be collected from impervious surfaces via catch basins and roof drain pipes and conveyed to an on -site detention pond. Roof drain pipes will be eight inches in diameter and outflow pipes from catch basins will be 12 inches in diameter. The water quality system will treat a portion of the flow before it is discharged into the City's conveyance system, which eventually leads to Puget Sound. Final Staff Evaluation for Environmental Checklist Page 3 Cottages at Redondo File 08-103455-00-SE/Doc I D 47561 d. Storm drainage facilities are required to be designed in accordance with the King County Surface Water Design Manual (KCSWDM), as amended by the City of Federal Way. Compliance with local, state, and federal water runoff standards is expected to provide sufficient mitigation of potential impacts. 4. Plants a-d. Concur with the checklist. As the subject property is undeveloped, vegetation removal will be necessary to provide a building envelope for the proposed structures and related improvements. The City's significant tree ordinance requires 25% retention/replacement of on -site significant trees. As proposed, two of the three significant trees on the subject property will be removed, which is below the threshold of replacement. Applicant proposes landscaped areas that include native planting and community terraced garden. 5. Animals a-c. Concur with the checklist. d. No impacts to animals are anticipated, as the work area is relatively small and the area to be graded does not provide any significant animal habitat. The applicant will provide typical residential landscaping such as trees, shrubs, and groundcover; therefore, no further mitigation is necessary. 6. Energy and Natural Resources a-c. Concur with the checklist. No significant adverse energy and natural resource impacts are anticipated; therefore, no mitigation measures are necessary. 7. Environmental Health a. The risk of environmental health hazards is always present during construction projects. Compliance with applicable local, state, and federal regulations should sufficiently mitigate the potential for significant adverse environmental impacts. b. During construction of the residence, noise levels will increase on the site due to construction activity. Pursuant to FWCC Section 22-1006, construction activity and the operation of any heavy equipment will be limited to the hours between 7:00 a.m. and 8:00 p.m., Monday through Saturday, with such activities being prohibited on Sundays or on holidays observed by the City unless an exception is granted by the City of Federal Way Community Development Director. Compliance with state and local noise standards will provide sufficient mitigation of impacts. 8. Land and Shoreline Use a-e. Concur with the checklist. f. The Federal Way Comprehensive Plan designation is Single -Family High -Density Residential. g. The site is not located within jurisdiction of the Shoreline Management Act. h. The City's critical area inventory has designated a majority of the subject property an "Erosion Hazard Area." i-1. Concur with the checklist. Final Staff Evaluation for Environmental Checklist Page 4 Cottages at Redondo File 08-103455-00-SE/Do. 1.D.47561 9. Housing a-c Concur with the checklist. Net gain of dwelling units is proposed. No housing impacts will result from the proposal; therefore, no mitigation is necessary. 10. Aesthetics a-c. Concur with the checklist. Cottage housing height restrictions are 24-foot maximum ridge height and 18 feet above average building elevation. The proposed action will not result in any aesthetic impacts provided the proposal complies with applicable code requirements and compliance with the final decision of the Hearing Examiner. 11. Light and Glare a-d. Concur with the checklist. Acceptable levels of light and glare normally associated with residential use and corresponding traffic is anticipated. 12. Recreation a-c. The proposed action will not result in any recreation impacts. Applicant will provide on - site common open space, which includes a courtyard and community garden. Applicant will also provide a "common house" to be enjoyed by residents of the cottage housing development. 13. Historic and Cultural Preservation a-c. No known historic, archeological, or cultural resources are known to be present on or near the site. Compliance with local, state, and federal regulations will provide sufficient mitigation of potential impacts. No additional mitigation is required. 14. Transportation a-e. Concur with the checklist. f-g. Transportation impacts will be mitigated via the City's Concurrency process. The Public Works Traffic Division is currently reviewing the Concurrency application and will determine the amount of peak trips and any required mitigation. If it is determined mitigation is necessary, the applicant shall pay a pro-rata share of future traffic improvement projects near the subject property. The projected total share to be paid by the applicant shall be paid prior to the issuance of any construction permit. 15. Public Services a-b. Concur with the checklist. 16. Utilities a-b. Concur with the checklist. CONCLUSION The lead agency for this proposal has determined that the proposed action does not have probable significant adverse impact on the environment and an Environmental Impact Statement (EIS) is not required under RCW 43.2 1 C.032(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. The information is available to the public upon request. The City reserves the right to review any future revisions or alterations to the site or the proposal in order to determine the environmental significance or nonsignificance of the project at that point in time. Prepared By: Matthew Herrera, Associate Planner Date Prepared: October 30, 2008 Final Staff Evaluation for Environmental Checklist Page 5 Cottages at Redondo File 08-103455-00-SE/Doc 1.D.47561 Cottages at Redondo File No. 08-i03455-40-SE Proposed Action: Cottage housing project consisting of eight singie-family residential units with associated site improvements on two exist- ing parcels totaling 1.3 acres. Location: King County parcels are 367440- 0140 and 367440-0145 located near the inter- section of 18th Avenue South and Pacific High- way South. Project Name: Cottages at Redondo Applicant: John Sawyer Lead Agency: City of Federal Way Department of Community Development Services Staff Contact: Matthew Herrera, Associate Planner, 253-835-2638 The lead agency for this proposal has deter- mined that it does not have a probable signifi- cant adverse impact on the environment, and an environmental impact statement (EIS) is not required under RCW 43.21 C.030(2)(c). This decision was made after review of a completed environmental checklist and gther information on file with the City. further information regarding this action is avail- able to the public upon request at the Federal Way Department of Community Development Services (Federal Way City Hall, 33325 811h Av- enue South. PO Box 9718. Federal Way, WA 98063-9718). This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issu- ance. Comments must be submitted by 5:00 p.m. on November 19, 2008. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City`s final determi- nation may file an appeal with the City within 14 days of the above comment deadline. You may appeal this determination to the Federal Way City Clerk, at the City of Federal Way (address above), no later than 5:00 p.m. on December 3, 20D8, by a written letter, accompanied with the associated fee, stating the reason for the appeal of the determination. You should be prepared to make specific factual objections. CITY OF FEDERAL WAY NOTICE FWM 1464 DETERMINATION OF NONSIGNIFICANCE Date of Publication: November 5, 2008 (DNS) FEDERAL WAY IRRoR A SOUND PUBLISEIING NEWSPAPER Affidavit of Publication Rudi Alcott, being first duly sworn on oath, deposes and says that he is the Publisher of The Federal Way Mirror, a semi -weekly newspaper. That said newspaper is published in the English language continually as a semi -weekly newspaper in Federal Way, King County, Washington, and is now and during all of said time has been printed in an office maintained at the aforementioned place of publication of said newspaper. That the annexed is a true copy of a legal advertisement placed by City of Federal Way — Community Development Dept. L-1464 as it was published in regular issues (and not in supplemental form) of said newspaper once each week for a period of one consecutive week(s), commencing on the 5th day of November, 2008 , and ending on the 5th day of November 2008, both dates inclusive, and that such newspaper was regularly distributed to its readers during all of said period. That the full amount of the fee charged for the foregoing publication is the sum of $98.06 which amount has been paid in full, or billed at the legal rate according to RCW 65.16.090. Subscribed to and sworn before me this 25th day of November, 2008. Notary Public in and for the State of Washington, Residing at Federal Way NOTARY PUBLIC STATE OF WASHINGTON TERYL A. HELLER My Appointment Expires Sept. 04, 2012 1414 S. 3241h STREET, SUIT[ B210, fINRAL WAY, WA 98003 ■ 253-925-5565 = f A X: 253-925-5750 CITY OF Federal Way DETERMINATION OF NONSIGNIFICANCE (DNS) Cottages at Redondo File No. 08-103455-00-SE Proposed Action: Cottage housing project consisting of eight single-family residential units with associated site improvements on two existing parcels totaling 1.3 acres. Location: King County parcels are 367440-0140 and 367440-0145 located near the intersection of 18`h Avenue South and Pacific Highway South. Project Name: Cottages at Redondo Applicant: John Sawyer Lead Agency: City of Federal Way Department of Community Development Services Staff Contact: Matthew Herrera, Associate Planner, 253-835-2638 The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment, and an environmental impact statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development Services (Federal Way City Hall, 33325 8t' Avenue South, PO Box 9718, Federal Way, WA 98063-9718). This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issuance. Comments must be submitted by 5:00 p.m. on November 19, 2008. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. You may appeal this determination to the Federal Way City Clerk, at the City of Federal Way (address above), no later than 5:00 p.m. on December 3, 2008, by a written letter, accompanied with the associated fee, stating the reason for the appeal of the determination. You should be prepared to make specific factual objections. Responsible Official: Greg Fewins Title: Director, Department of Community Development Services Address: 33325 8 h Avenue South, PO Box 9718, Federal Way, WA 98063-9718 Date Issued: November 5.2008 Signature: Doc ID 47582 LU U) O E U C N T O 0s= w O N .5Z ._ a� '~ j Co C c_ 2Lim Nt cr ��L0 Ce) p Et-r fj Q � r v g -c Cl � Ob 7�1 0 o ,� u ac)Qom E C � O C W 0 �CL �M 1 �.+ T 'co - - _.LS AV Oe (D U) U) SAV% O O M O A 1% CITY OF Federal Way NOTICE DETERMINATION OF NONSIGNIFICANCE (DNS) Cottages at Redondo File No. 08-103455-00-SE Proposed Action: Cottage housing project consisting of eight single-family residential units with associated site improvements on two existing parcels totaling 1.3 acres. Location: King County parcels are 367440-0140 and 367440-0145 located near the intersection of 18'h Avenue South and Pacific Highway South. Project Name: Cottages at Redondo Applicant: John Sawyer Lead Agency: City of Federal Way Department of Community Development Services Staff Contact: Matthew Herrera, Associate Planner, 253-835-2638 The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment, and an environmental impact statement (EIS) is not required under RCW 43.2 1 C.03 0(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Further inforrnation regarding this action is available to the public upon request at the Federal Way Department of Community Development Services (Federal Way City Hall, 33325 8'h Avenue South, PO Box 9718, Federal Way, WA 98063-9718). This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issuance. Comments must be submitted by 5:00 p.m. on November 19, 2008. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. You may appeal this determination to the Federal Way City Clerk, at the City of Federal Way (address above), no later than 5:00 p.m. on December 3, 2008, by a written letter, accompanied with the associated fee, stating the reason for the appeal of the determination. You should be prepared to make specific factual objections. Published in the Federal Way Mirror on November 5, 2008. Doc I D 47583 41k CITY Federal o. Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 8th Avenue South PO Box 9718 Federal Way WA 98063-9718 253-835-7000; Fax 253-835-2609 www.cityQffederalway.com DECLARATION OF DISTRIBUTION I, hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Optional DNS/MDNS ❑ FWCC Interpretation ❑ Other was mailed ❑ faxed O 0 '-r , 2008. Project Name File Number(s) Signature ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document ❑ e-mailed and/or ❑ posted to or at each of the attached addresses on �-)62,yc-S-SE ei0r\rJ0 Date P - `/ - D 9 K:\CD Administration Files\Declaration of Distribution.doc/Last printed 1 /3/2008 4:53:00 PM CITY OF Federal Way DETERMINATION OF NONSIGNIFICANCE (DNS) Cottages at Redondo File No. 08-103455-00-SE Proposed Action: Cottage housing project consisting of eight single-family residential units with associated site improvements on two existing parcels totaling 1.3 acres. Location: King County parcels are 367440-0140 and 367440-0145 located near the intersection of 180' Avenue South and Pacific Highway South. Project Name: Cottages at Redondo Applicant: John Sawyer Lead Agency: City of Federal Way Department of Community Development Services Staff Contact: Matthew Herrera, Associate Planner, 253-835-2638 The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment, and an environmental impact statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development Services (Federal Way City Hall, 33325 8t` Avenue South, PO Box 9718, Federal Way, WA 98063-9718). This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issuance. Comments must be submitted by 5:00 p.m. on November 19, 2008. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. You may appeal this determination to the Federal Way City Clerk, at the City of Federal Way (address above), no later than 5:00 p.m. on December 3, 2008, by a written letter, accompanied with the associated fee, stating the reason for the appeal of the determination. You should be prepared to make specific factual objections. Responsible Official: Greg Fewins Title: Director, Department of Community Development Services Address: 33325 8t' Avenue South, PO Box 9718, Federal Way, WA 98063-9718 Date Issued: November S 2008 Signature: Doc I D 47582 LU Uc m O � '/^� p Ql '7c Z •c � N Y,,Y^!! ! O C O O 4 �m�o� M O �= �-� M 84 r -0 CD o in N O w 2 o ccin ri LL N Q- V N C O O > c W r C] d LL O O O M O City of 3G Parcel Federal Way Notification area 304020- • 0055 m304020- a 0060 - O 'Z 0 042104- 0 9200 N 042104- 9031 % ti a 042104- 9033 042104- 9157 , 042104- 9259 042104- 9035 042104- 9038 042104- 9257 } 2 V I Legend King County Tax Parcels Subject Property Notified Properties 10/23/2007 City of Federal Way 33325 8th Ave S. P.O. Box 9718 Federal Way Wa. 98063 (206) - 835 - 7000 www.cityoffederalway.com 304020- 672050-0080 304020- 0095 Q -672050- 672050- 0171 304020- _.0020 0090 Q 0170 672050- 304020- 304020- 0010 30,4020- 0142 = 0093 0100 - - 304020- 00 304020- '304020 0180 0141 0140 r 367440- S 296TH ST 0010 - - 367440- 367440- 0106 367440- 367440- 0015 co0105 367440- 367440- 0235 367440- 0225 y 0030 , 367440- 0230 367440- > Q 367440- 0110 0236 ; � _ 0035 367440- 367440- 367440- ~O 367440-; _ 367440- ^ 0116 367440- 3 0220 0222 0221 N 0050 - Oil 5 _ p117_ 367440- 0055 367440- 367440- 0120 0215 367440- 4 0065 367440- 367440- 0125 367440- 0211 - — ---- 367440- 0207 645345- 367440- 1 367440- 0205 367440- 0000 0131 j I1 0206 367440- 367440- - 0135 0204 367440- 367440- _ __ 0202 0200 367440- 367440- - `- co 0141 0140 367440- 0195 Q 367440- 367440- 367440- N Z0145 0190 0192 CO 367440- 1 367440- 367440- 0151 367440- 367440- 367440- _ ^-� 0152 0150 0187 0185 0186 F" - O N 367440-367440- 367430-367430- 01550180 0020 0010 367440- 367430- S29 13TH-P L 0160 0030 36744fl- 0167 367440- -- 0165 042104- 042104- 9213-- 9011 042104- 9135 RECEIVED 9012 367430- - 0080 367430- 367430-367430- _. -- 367440- 0040 0060 367430- 0168 0050 367430- i 0090 - 007G 042104- 042104- 9221 9168 042104- 9169 CITY OF FEDERAI W/�IY SCale: CITY OF CDS A Federal Way N 0 55 110 Feet t This map is intended for use as a graphical representation only. 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Cl O O O V) )n V) V) V') V) V) V") V) V) V) V) V) V) V) V) Vl in V) V) V) V) V7 V) V) M M M M M M M M M M M M M M M M M Cl) M M M M M M M V) N V) N V) V) V) V) V) V) V) V) V) V) V) V) V) V) V) V) V) V) V) V) VI N O N O 0) C6 a- LAKEHAVEN UTILITY DIST DEPT OF ECOLOGY SOUTH KING FIRE & RESCUE PO BOX 4249 ENVIRONMENTAL REVIEW SEC sr BOX 47703 31617 1 AVE S PO FEDERAL WAY WA 98063 PO BO A WA 98504-7703 FEDERAL WAY WA 98003 LAURA MURPHY TRIBAL ARCHAEOLOGIST MUCKLESHOOT INDIAN TRIBE 39015 172ND AVE SE AUBURN WA 98092 EDWARDS/LYMAN/THO MAS PUYALLUP TRIBE OF INDIANS HISTORIC PRESERVATION DEPT 3009 E PORTLAND AVE TACOMA WA 98404 wll,e,4)j Doc. I.D. 41k OF Federal Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 8th Avenue South PO Box 9718 Federal Way WA 98063-9718 253-835-7000; Fax 253-835-2609 www.cit offederalwa .corn DECLARATION OF DISTRIBUTION hereby declare, under penalty of perjury of the laws of the State of Wa ington, Ithat a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Anticipated DNS/MDNS ❑ FWCC Interpretation ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was ❑ mailed ❑ faxed ❑ e-mailed and/or*posted to or at each of the attached addresses on iUV 2008. Project Name �-U File Number(s) Signature a a-[ V—r_CJjA 55—oa —SE Date /J'l K:\Intern\Declaration of Distribution with Posting Sites.doc/Last printed 11 /4/2008 10:15:00 AM Posting Sites: Federal Way City Hall - 33325 8th Avenue Federal Way Regional Library - 34200 1 It Way South Federal Way 320th Branch Library - 848 South 320th Street Subject Site - 18th Avenue South and Pacific Hwy South K:\Intem\Declaration of Distribution with Posting Sites.doc/Last printed 11 /4/2008 10:15:00 AM 41k CITY OF Federal Way NOTICE DETERMINATION OF NONSIGNIFICANCE (DNS) Cottages at Redondo File No. 08-103455-00-SE Proposed Action: Cottage housing project consisting of eight single-family residential units with associated site improvements on two existing parcels totaling 1.3 acres. Location: King County parcels are 367440-0140 and 367440-0145 located near the intersection of 18'h Avenue South and Pacific Highway South. Project Name: Cottages at Redondo Applicant: John Sawyer Lead Agency: City of Federal Way Department of Community Development Services Staff Contact: Matthew Herrera, Associate Planner, 253-835-2638 The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment, and an environmental impact statement (EIS) is not required under RCW 43.2 1 C.03 0(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development Services (Federal Way City Hall, 33325 81' Avenue South, PO Box 9718, Federal Way, WA 98063-9718). This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issuance. Comments must be submitted by 5:00 p.m. on November 19, 2008. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. You may appeal this determination to the Federal Way City Clerk, at the City of Federal Way (address above), no later than 5:00 p.m. on December 3, 2008, by a written letter, accompanied with the associated fee, stating the reason for the appeal of the determination. You should be prepared to make specific factual objections. Published in the Federal Way Mirror on November 5, 2008. Doc. I.D. 47583 41k Federal OF Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 8th Avenue South PO Box 9718 Federal Way WA 98063-9718 253-835-7000; Fax 253-835-2609 www.citvoffederalway.com DECLARATION OF DISTRIBUTION 1, krr ar � �R X hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice DT Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Optional DNS/MDNS ❑ FWCC Interpretation ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was ❑11mailed ❑ faxed tf e-mailed and/or ❑ posted to or at each of the attached addresses on GZ , 2008. Project Name File Number(s) Signature 159 Date K:\CD Administration Files\Declaration of Distribution.doc/Last printed 1 /3/2008 4:53:00 PM ,Ilk. '4%� CITY OF Federal Way NOTICE DETERMINATION OF NONSIGNIFICANCE (DNS) Cottages at Redondo File No. 08-103455-00-SE Proposed Action: Cottage housing project consisting of eight single-family residential units with associated site improvements on two existing parcels totaling 1.3 acres. Location: King County parcels are 367440-0140 and 367440-0145 located near the intersection of 18'h Avenue South and Pacific Highway South. Project Name: Cottages at Redondo Applicant: John Sawyer Lead Agency: City of Federal Way Department of Community Development Services Staff Contact: Matthew Herrera, Associate Planner, 253-835-2638 The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment, and an environmental impact statement (EIS) is not required under RCW 43.2 1 C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development Services (Federal Way City Hall, 33325 8`b Avenue South, PO Box 9718, Federal Way, WA 98063-9718). This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issuance. Comments must be submitted by 5:00 p.m. on November 19, 2008. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. You may appeal this determination to the Federal Way City Clerk, at the City of Federal Way (address above), no later than 5:00 p.m. on December 3, 2008, by a written letter, accompanied with the associated fee, stating the reason for the appeal of the determination. You should be prepared to make specific factual objections. Published in the Federal Way Mirror on November 5, 2008. Doc. 1. D- 47583 Tamara Fix From: Teryl Heller [theller@fedwaymirror.com] Sent: Friday, October 31, 2008 2:06 PM To: Tamara Fix Subject: Re: Legal Notice - Cottages at Redondo Attachments: 29426255033.doc; ATT00001.htm Tamara, No problem. We will get this published. Thanks. On Oct 31, 2008, at 1:39 PM, Tamara Fix wrote: Please publish the following legal notice (Cottages at Redondo DNS, 08-103455) in Wednesday's (Nov. 5, 2008) issue. Please confirm and furnish an affidavit of publication. I'm out Monday, so can you confirm you can open this okay today. Thanks and Happy Halloween! Samara. Fix .Adinin Asst. City o -,Federal-Way Camara. " -@cit n ederaC"wa . corn S D UND ENGINEERING, INC. civil engineers • land planners ENVIRONMENTAL CHECKLIST FOR COTTAGES AT REDONDO FEDERAL WAY, WASHINGTON DULY 2008 PREPARED FOR: TOM SAWYER ENTERPRISES 19904 DES MOINES MEMORIAL DRIVE SEATTLE, WA 98148 PREPARED BY: STEPHEN BRIDGEFORD, LAND PLANNER SOUND ENGINEERING, INC. 1102 COMMERCE ST., SUITE 300 TACOMA, WA 98402 RECEIVED (253) 573-0040 JUL 1 8 2008 ,CM OF EDERPL WAY CDS PROJECT 06154.10 DATED 7.08 A. BACKGROUND 1. Name of proposed project, if applicable: Cottages at Redondo 2. Name of applicant: Tom Sawyer Enterprises 3. Address and phone number of applicant and contact person: Applicant Address: 2016 38th Street NW Gig Harbor, WA 98335 (253) 851-5146 Contact Person: Stephen Bridgeford 1102 Commerce Street, Suite 300 Tacoma, WA 98402 Phone (253) 573-0040 Fax (253) 573-0142 4. Date checklist prepared: July 7, 2008 5. Agency requesting checklist: City of Federal Way 6. Proposed timing or schedule (including phasing, if applicable): Once all necessary approvals and permits are obtained, the project will be constructed. It is anticipated that construction will begin, weather permitting, in spring of 2008 with anticipated completion in summer 2009. Project will be built in a single phase. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No. The proposed development will be constructed in one phase with no further plans for expansion. Page l of 15 List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A Subsurface and Geotechnical Engineering Report dated December 5, 2005 was prepared by Jason Engineering & Consulting Business, Inc. See Appendix B for Subsurface and geotechnical Engineering Report. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. To our knowledge, no other government approvals are pending that directly affects the property on which the proposed development will be constructed. 10. List any government approvals or permits that will be needed for your proposal, if known. SEPA Threshold Determination, Land Use Approval, Site Development Permits and Building Permits. 11. Give a brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. The proposal is to construct an 8-unit "Cottage Housing" single family residential development on approximately 1.34 acres. The proposed development has been approved by Federal Way City Council to pursue permits in order to construct a "Cottage Housing Development." The development will include stormwater facilities, utilities, private access way, open space, a common structure, three garage structures and tree retention (see site plan for more detail). The various components of the proposed development will be discussed further in this checklist. See Appendix Al for Site Plan. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address if any, and section, township, and range if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. Parcel Number(s): 3674400-140 & 3674400145 Section: 4 'Township: 21N Range: 4E See Appendix A2 for Vicinity Map and A3 for Legal Description. Page 2 of 15 B. ENVIRONMENTAL ELEMENTS 1. EARTH a. General description of the site: flat, rolling, hilly, steep slopes, mountainous Site is predominantly flat with a steep slope along the eastern boundary line. b. What is the steepest slope on the site (approximate percent slope)? The steepest slope on the site is approximately 40% and is located along the eastern boundary line (see attached site plan). The proposal includes potential terraced gardens along this slope. Terraced gardens will be built per geotechnical engineering recommendations. See Appendix Al for Site Plan. c. What general types of soils are found on the site? If you know the classification of agricultural soils, specify them and note any prime farmland. The on -site soils are mapped as Alderwood gravelly sandy loam, 15 to 30 percent slopes and Alderwood material, 0 to 6 percent slopes, according to the Soil Conservation Service, Soil Survey for the King County Area, Washington. See Appendix A4 for the Soil Map and A5 for Soil Description. d. Are there surface indications or history of unstable soils in the immediate vicinity? Page 11 of the Subsurface Exploration and Geotechnical Engineering report prepared by Jason Engineering states that "there are no signs of previous slope instability or failures." See Appendix B for Subsurface and geotechnical Engineering Report. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Site preparation will require grading activities for roads, building pads the stormwater facilities. The grading areas will encompass the majority of the site. It is anticipated that there will be approximately 2,281 cubic yards of cut and 504 cubic yards of fill. Though it is not anticipated to be needed, the source of any fill will be dependent on availability and pricing at the time of construction. Page 3 of 15 f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Yes. Removal of the existing vegetation could result in erosion. Temporary erosion control measures approved by the City of Federal Way will be utilized during construction. g. About what percent of the site will be covered with impervious surfaces after construction? The site is anticipated to be approximately 50% impervious when completed. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any. As part of the construction documents, a Temporary Erosion and Sedimentation Control Plan will be prepared for approval by the City of Federal Way. Erosion control features will be installed prior to construction and maintained until the site has been stabilized. 1 2. AIR a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors and industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. 1 The grading activities proposed at the site will cause dust particulate to be emitted into the air. Vehicles and equipment used during all phases of construction can be a potential source of emissions. When the project is complete, the site may be the source of vehicle emissions from vehicles using the site. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, describe. Vehicles using the surrounding street system may, at times, be a source of emissions or odor. However, it is not anticipated that off -site sources of emissions or odor will impact the proposed development of this site. c. Proposed measures to reduce or control emissions or other impacts to air, if any. �j Unwanted dust particulate can be controlled to a certain extent by the application of water before and during grading activities. It is assumed that construction vehicles used will be equipped with factory -installed mufflers and spark arresters that would control excessive emissions. There are no measures proposed to control emissions as a result of vehicles using the site after construction. IN I J Page 4 of 15 3. WATER a. Surface 1) Is there any surface water body on or in the immediate vicinity of the site (including year- round and seasonal streams, saltwater, lakes, ponds, and wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. To our knowledge, there are no surface water bodies on or in the immediate vicinity of the site. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. Not applicable, there are no surface water bodies on or in the immediate vicinity of the site. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate -the source of fill material. Not applicable, there are no surface water bodies or wetlands are on or in the immediate vicinity of the site. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No surface water withdrawals or diversions will be required. 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. To our knowledge, the site does not lie within a 100-year floodplain. JSee Appendix A7 for Flood Insurance Rate Map. 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 waste material will be discharged to surface waters as part of this proposal. Page 5 of 15 b. Ground 1) Will ground water be withdrawn, or will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. There will be no groundwater withdrawals. There will be no direct discharges of water to groundwater. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any. 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. Water and sewer utilities shall be provided by the Lakehaven Utility District. No waste materials will be discharged directly into the ground. c. Water Runoff (including stormwater) 1) Describe the source of runoff and method of collection and disposal, if any. Where will this water flow? Will this water flow into other waters? If so, describe. The primary source of runoff will be from stormwater, although minimal water runoff is anticipated to occur as a result of landscape watering and other maintenance activities. 2) Could waste materials enter ground or surface waters? If so, generally describe. The site will be served by The Lakehaven Utility District. No waste materials will be discharged directly into the ground. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any. All stormwater runoff generated from this project site will be collected in the stormwater detention pond onsite and discharged to the storm conveyance system within the 181h Ave. South right-of-way. Page 6 of 15 4. PLANTS Underline the types of vegetation found on the site. Deciduous tree: alder, maple, aspen, other Evergreen tree: fir, cedar, pine, other Shrubs Grass Pasture Crop or grain Wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other Water plant: water lily, eelgrass, milfoil, other Other types of vegetation b. What kind and amount of vegetation will be removed or altered? The clearing area will encompass the entire site. Native plant species will be retained were possible. c. List threatened or endangered species known to be on or near the site. To our knowledge, there are no threatened or endangered plant species on or near the j site. l d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any. The site will be replanted with native species. 5. ANIMALS a. Underline any birds and animals that have been observed or are known to be on or near the site. 1 Birds: hawk, heron, eagle, songbirds, other: J Mammals: deer, bear, elk, beaver, other: Fish: bass, salmon, trout, herring, shellfish, other: Jb. List any threatened or endangered species known to be on or near the site. JThere are no threatened or endangered species known to exist on or near the site. c. Is the site part of a migration route? If so, explain. A The site is located within the boundaries of the western flyway for migratory bird Ipopulations. I j Page 7 of 15 d. Proposed measures to preserve or enhance wildlife, if any. No measures are proposed. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. The primary energy source required to meet the energy needs of the proposed development is electricity and natural gas. Sufficient amounts of both resources would be used to maintain a comfortable lifestyle and environment. b. Would your project affect the potential use of solar energy by adjacent properties? No, it is not anticipated that this project will affect the potential for adjacent properties to use solar energy. �:. What kinds of energy conservation features are included in the plans of this proposal? Gist other proposed measures to reduce or control energy impacts, if any. The development will be built to meet current building and energy codes. %. 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? Typically, a residential development is not a source of environmental health hazards. However, the risk of fire is always present within any type of development. 1) Describe special emergency services that might be required. While not anticipated to occur, the services of the local emergency service providers may be required at some time. 2) Proposed measures to reduce or control environmental health hazards, if any. None are proposed. Page 8 of 15 b. Noise 1) What types of noise exist in the area that may affect your project? There are no known sources of off -site noise in the area that would affect the proposed development. 2) What types and levels of noise would be created by or associated with the project on a short-term or long-term basis? Indicate what hours noise would come from the site. During the short-term, construction activity at the project site will vary considerably as the construction progresses. Also, because the noise produced on the site depends on the equipment being used, the noise would vary from day to day. Noise levels can be expected to range from 57 to 89 dBA (based on a construction activity noise model, described in Noise from Construction Equipment and Operations, Buildhrg Equipment, and Home Appliances). Noise associated with construction operations on the site will occur roughly between the hours of 7:00 a.m. to 6:00 p.m., Monday through Friday or as directed by City building permits. Long-term noise impacts will result from vehicles using the site and noises typical to a residential development. 3) Proposed measures to reduce or control noise impacts, if any. Noise impacts associated with the construction phases of the project will be limited in duration. To mitigate general noise impacts during the grading phase, measures such as using and regularly maintaining efficient mufflers and quieting devices on all construction equipment and vehicles can be anticipated. No measures to mitigate noise impacts during the building phase are proposed. Construction hours will be limited to those hours specified in the City issued permits. No measures are proposed to mitigate long-term noise impacts once the project is constructed. Page 9 of 15 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? The project site is currently vacant land. North: Single Family Residential East: Single Family Residential West: Single Family Residential, 18th Avenue, Multi -Family Apartments South: Single Family Residential b. Has the site been used for agriculture? If so, describe. No. Not to our knowledge. c. Describe any structures on the site. Site is currently vacant land. d. Will any structures be demolished? If so, what? Not applicable site is currently vacant land. e. What is the current zoning classification of the site? The site is currently zoned RS-7200 — Single -Family Residential. f. What is the current comprehensive plan designation of the site? The generalized land use designation is Single -Family Residential. g. If applicable, what is the current shoreline master program designation of the site? Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? No. To our knowledge no portion of the site has been classified as `environmentally sensitive" i. Approximately how many people would reside or work in the completed project? Assuming approximately 2.5 people would reside at each proposed single-family unit; an anticipated 20 people would reside at the completed project. Page 10 of 15 Approximately how many people would the completed project displace? None the site is currently vacant land. k. Proposed measures to avoid or reduce displacement impacts, if any. Not applicable. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any. The site is located within an area zoned for single-family residential development. There are other such developments in the vicinity of the project site. furthermore, the proposal has gone through review by the Federal Way City Council and has been found to be compatible with the surrounding land uses. 9. Hous(NG a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. There will be approximately 8 single-family units at build -out in the low to medium income range. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. No units will be eliminated. c. Proposed measures to reduce or control housing impacts, if any. There are no measures proposed to control housing impacts. The proposed development will, in fact, create housing that will benefit potential homebuyers in the Federal Way area. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? The tallest structure will be approximately 22-feet. b. What views in the immediate vicinity would be altered or obstructed? To our knowledge there will be no obstruction of views, in the vicinity, of this project. Page 11 of 15 c. Proposed measures to reduce or control aesthetic impacts, if any. The proposed development will include architecturally compatible homes. The completed project will be of a cohesive design, style and color. 11. LIGHT AND GLARE a. What type of light or glare will be produced? What time of day would it mainly occur? Light and glare will result from reflective surfaces, exterior building lights and streetlights. Interior lighting may be noticeable. The occurrence of light impacts would be anticipated from dusk to dawn. Glare impacts, including those associated with sunny days and headlights reflecting off window surfaces, could be expected both day and night. b. Could light or glare from the finished project be a safety hazard or interfere with views? It is highly unlikely that glare or light from the project site will interfere with views or be a safety hazard. Parking lot lighting and other outdoor lighting are intended to promote safety rather than create a safety hazard. d. What existing off -site sources of light or glare may affect your proposal? There are no offske sources of light or glare that are anticipated to affect this proposal. d. Proposed measures to reduce or control light and glare impacts, if any. The exterior building lights will be of low intensity, typically used for safety and security purposes. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? _ 1 There are two parks (Sacajawea Park and Wildwood Park) and a public swimming pool (Kenneth Jones Pool) located within 1 mile of the site (See appendix for l recreation map). To our knowledge there are no informal recreation opportunities 1 located in the immediate vicinity of the site. See Appendix A8 for Recreation map. b. Would the proposed displace any existing recreational uses? If so, describe. No, the proposed project will not displace any existing recreational uses. Page 12 of 15 c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any. There are no measures proposed to reduce or control impacts to off -site recreational opportunities. 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any places or objects listed on, or proposed for, nation, state, or local preservation registers known to be on or next to the site? If so, generally describe. No, there are no known sites in the vicinity eligible for or listed in any jurisdictional historic register. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. There are no known landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. c. Proposed measures to reduce or control impacts, if any. There are no measures proposed to reduce or control impacts. However, if objects are unearthed during site work that may be culturally significant, the Washington l State Office of Archaeology & Historic Preservation will be notified. _i 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. The project site fronts 18th Avenue South. Access to the site will be off of 18"' Avenue South from a private access way. y c. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? The site is served by public transit. There are bus stops along Pacific Highway South near the intersection of 18th Avenue South located less than 0.25 miles from the site. See Appendix A6 for the King County transit stops. Page 13 of 15 c. How many parking spaces would the completed project have? How many would the project eliminate? The completed project is anticipated to provide 17 parking spaces (including garages). No parking spaces will be eliminated. d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe. Improvements to 18th Avenue South will include half street improvements, curb, gutter and sidewalk along the property frontage an onsite private access way with fire turnaround will be constructed as part of the project. See appendix Al for the Site Plan e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No, the project site is not adjacent to or in the immediate vicinity of water, rail or air transportation. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. Traffic data provided below is from the Institute of Transportation Engineers Publication, Trip Generation, Sixth Edition. The land use designation used for this project is 210- Single —family Detached Housing. Base on a proposed total of 8 dwelling units. The average vehicle trip ends for the project are as follows: Weekday: 0.77/unit a.m. peak hour of generator: 6 trips 1.02/unit p.m. peak hour of generator: 8 trips 9.57/unit daily average: 77 trips Weekend: 0.94/unit p.m. peak hour of generator: 8 trips g. Proposed measures to reduce or control transportation impacts, if any. There are no proposed measures to reduce or control transportation impacts. 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. Yes. Whenever a residential development is constructed, the need for public services, such as police and fire protection, increases. Page 14 of 15 b. Proposed measures to reduce or control direct impacts on public services, if any. Impacts will be controlled by the increase in tax base and tax assessments paid to the public services. 16. UTILITIES a. Underline utilities currently available at the site: Electricity, natural gas, water, refuse service telephone, sanitary sewer, septic system. 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 that might be needed. i) Electricity ii) Natural Gas iii) Water iv) Refuse Service v) Telephone vi) Sanitary Sewer vii) Septic System Puget Sound Energy Puget Sound Energy Lakehaven Utility District Federal Way Disposal Qwest Communications Lakehaven Utility District Not Applicable All utilities proposed are located within 18th Ave South. Page 15 of 15 C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. SIGNATURE: DATE SUBMITTED: 7 r ilo Page 16 of 15 APPENDIX TABLE OF CONTENTS APPENDIX A SITEPLAN I ........................................................................................................................................ 2 VICINITYMAP................................................................................................................................... LEGALDISCRIPTION.......................................................................................................................... 3 4 SOILMAP.......................................................................................................................I.................. SOILDISCRIPTION(S) ......................................................................................................................... 5 KINGCOUNTY TRANSIT STOPS......................................................................................................... 6 FLOODINSURANCE RATE MAP......................................................................................................... 7 RECREATIONMAP............................................................................................................................ H APPENDIX B SURFACE EXPLORATION AND GEOTECHNICAL ENGINEERING STUDY DATED DECEMBER 5, 2005 PREPARED BY JASON ENGINEERING CONSULTINGBUSINESS, INC........................................................................................................... 1 v U CENIER,INE GRAPHIC SCALE 5 51 24, 1 6' 8' S' p 9$ I= 30 inch F8L30 [L V 18TH AVE. SOUTH Z CROSS SECTION N. T. S. BUILDNG STATISTICS MAXIMUM BUILDING FOOTPRINT: 800 SO. FT. UNIT SIZE BETWEEN 800 AND 1,100 SQ. FT. MAX 1ST FLOOR AREA: 800 SQ. FT. -4— MAX 2ND FLOOR AREA: 35% OF 1ST FLOOR GROSS co FLOOR AREA: 88OU S0. FT COTTAGES AT REDONDO A PORTION OF THE SW 1/4 OF SECTION 04, TOWNSHIP 21 N, RANGE 04, W.M. CITY OFCOVEREDEML S' KING EET/SITE OLANINGTON LOT EXHIBIT -1:50 J 250 a9• N99'57.36' V I L{TT 8 (a LOT 7 LOT 6 LOT S. IB2 oTSF Ion 2329 SF jS M5 SF 240 5F Mai ale++ a Im i !, I �' 1 f 37.Az' NB9'97.41�V� STad` r� 32216E V 1 UM--� rw f TRACT 8 qq 6774 SP LOT i LOT 2 LOT" gryi 2361 SF B87 SF � 2622 SF - - 5139'57'45'E 3912- 8' OPEN SPACE STATISTICS t 1 MIN. OPEN SPACE AREA 500 SQ. FT. PER UNIT W/MIN OF 3.000 SQ. FT. PER AREA OPEN SPACE j OPEN SPACE REQUIRED: SOO - 8 . 4,000 SO. FT. OPEN SPACE PROVIDED: APPROXIMATELY 4.124 SQ. FT. (INCLUDING 1,000 SCL FT COURTYARD) PRIVATE OPEN SPACE: 400 SQ. FT. 7 OPEN SPACE IN FRONT YARD DENSITY I PALRCELP674400135 MAAMUM DENSITY: 12 COtDaS PIRMTIEH IN A C.H.D. DENSITY CALCULATION: 2 COTTAGES PERMITTED FOR EAW 1 BY WOUILYING ZONE UMDEEA,VW 2OE WOULD PERMIT APPROXIMATELY 4 UNITS J THEREFORE B UNITS WOULD BE PERMITTED IN THE C.H.D. / 2sO9' N89'r7'36' CURRENT AND PROPOSED USE SITE IS CURRENTLY VACANT LAND. f THE PROPOSED USE IS SINGLE-FAMILY RESIDENTIAL �' LOT 8 LOT 7 LOT 6 LOT 5 m 964 SF 964 SF 962 SP 782 SP PARCEL NUMBERS 3674400140 & 3674400145 PARCEL13674400141 _ I _ PROJECT SITE COVERAGE FXISMG N COWRAEI oRLPOSE19 RSA ] 137.42• N�9'57.41'V BUILDINGS o sQ.Fr.( ox) a,s47 sQ.Fr.( nx) CONCRETE/PAVING 0 SQ.FT.( (x) 11,762 SO.FT.( 20%) t LOT 4 TOTAL IMPERVIOUS 0 SQ.FT.( 0%) 21,309 SO._FT .( 37%) 'VA t:."1, MH,1T3H 78z sF PERVIOUS PAVING (TURF STONE) 0 SQ.FT.( 0%) 2.606 SO.FT.( 4%) a ? _ _ -- HOUSE LANDSCAPED/NATURAL 58.190 SQ.FT.(100x) 34,275 SO FT.( 59%) SS__S S S 939 5F TOTAL PROJECT AREA 'r8,190 90FT.(IWX) SB,190 %FT•(100x) oV _ _ _ x_ K SAWCTJT EILISTING PAVEHENT y x• �- AND PROVIDE A SHODTH 1 55 PARIaNG STATISTICS rRAT4sInoN MIN. PARKINC; 18 SPACES PER UNIT CON nUCT ADDITIONAL PAVEMENT. I '� SFOPAIWATIX ` �, LOT LOT 2 LOT 3 PART[RRG PROMOED• t7 SPACES CIiRH- GUTTER, AND SIDEWALK �V 1',VESr PAPINHC: 1U OF TOTAL DE9CTRATED FOR GUESTS ALR]NG FSTH A:VENLIE S. FRDNTAL'd r MENTION/ U U _ 782 SF 782 SF 782 5F WMT PARKNC PROWDEDc 2 SPACES 7 WATER WA11IY GARAGE AREA: NO SNARED CARAGE OR WORT MAY EXCEED &0 SO. FT, TRPATMONr I (2) 1 - � r OARAGE AREA: NO MORE MAN 50% OF COVERED PARKING MAY BE CARPORTS �� • m Q .� . GARAGE PAPoOMC PROVIDED: 8 SPACES Rr SHARED GARAGE `TRUMW I.. 4%z 0 Iy PARCEL13674400151 PARCEL136744MI52 PARCELIM74400150 UTILITY NOTE LOCATIONS W SAID UILITY. OWT SANITARY SEWERS, AS SHORN % THESE PLAITS ARE BASED ON UNVIDtFIE D PUBLIC INFORMATION AND ARE SUBJECT 10 VARIARCIN. K CONTRACTOR SHALL BE NESPOHSEld FOR VERCFYK THE LOCATION. OAEHNONH AND LtpFM OF EXT5IING UFLMS YARETxFB SHOWN ON THESE PLANS OR NOT HY POT MAC THE UTILITIES AND SUMVINO THE HORIZONTAL AND VERTCAL LOCATION PRIOR TO CCNSTRUCTMRI. THIS SMALL INCLWE CALUNC f-800»424-5555 Am THEM P07 NOIINC ALL CC THE EXISTING UTILITY LOCA105 OF NEW UTILITY CROSS41G5 TO PHYSICALLY WRFY METIER OR HOT QMI1CTS ME THE CUNM410R ACCEPTS FULL "OlSIB41TY FOR ANY AND ALL DAMAGES THAT HAPPEN OUE TO THE CONTRACTORS FAIURE To LOCATE EXACTLY AHD PRESUM ANY AND ALL UTILITIES IF CONFLICT SHaKD OXUR, THE CONTRACTOR SHALL CO1r91LT SODIID F1fOPaEERINC TO RESOLVE ALL PROBLEMS Mw TO PROCEEDING WITH CON5IRUCT7aN. SOUND EHGrTiEER61a ASSUMES NO LIABILITY FOR THE LOCATION OF UNDERGROUND UTILITIES. LEGAL DESCRIPTION THAT PORTION OF LOT & BLOOL 2, JEANNETTE SOUND VIEW TRACTS, ACCORDING TO THE PLAT THEREOF RECOROEO AR VOLUME 44 OF PLATS, PAGE 68, IN KING COUNTY, WASHINGTON. BEING DESCRIBED AS FOLLOWS: THAT PORTION LYING EAST OF A UNE RUNNING SOUTH FROM A POINT 122.04 FEET EAST OF THE NORTHWEST CORNER OF SAID LOT. AND ALL OF LOT 9, BLOCK 2, JEANNETTE SOUND VIEW TRACTS, AS PER PLAT RECORDED IN VOLUME 44 OF PLATS, PAGE 68, IN KING COUNTY, STATE OF WASHINGTON. TOPOGRAPHIC NOTE TIRE E1WHO CLiLTIIRAL AND TOPOGRAPHIC DATA SHOWN ON THESE DRAWINGS HAS FIFIEN PREPARED, IN PART, BASED UPON INFORMATION FURNISHED BY OIHM MM 9 THXS INFOIAIAPON IS BEUM TO BE RELIABLE. $0 CANNOT ENSURE ITS ACCURACY AND THUS 6 NOT RESMSELE FOR THE ACCURACY OF THAT NFOlMAT10N OR FOR AAY ERRORS OR .OUISSONS WHEN MAY HAVE BEEN WWREWATED INTO THESE DRAWINGS AS A RMT- SOILS REPORT NOTES THE FOLLOWING SOILS REPORT NOTES FOR THE SITE SHALL BE CONSIDERED PART OF THESE CONSTRUCTION DOCUMENTS: SOIL INVESTIGATION KRFORIM BY: JASON ENGINEERING & CONSULTING BUSINESS. INC. PO BOX 181 AUBUPN. WA 90071 la: 206-788-8645; FAX 253-833-7316 REPORT DATED DECEMBER 5, 2005 AND ALL SUBSEQUENT ADDENDUMS. FILE k 05001-110 IT SHALL BE PE RES?ONS>BE1TY OF THE CONTRACTOR TO ENSURE THAT ALL PRDWSOHS OF Wff SOLS REPORT FEN HE SITE BE OBSERVED AND COMPLIED WITH DURK ALL PHASES OF TILE STE PREPARATIOEI, GRADIMC OPERATIONS, FOUNLTARO. $LAA AND PAVING CONSTRUCTTOL ANY P"S'ONS OF TIE SOILS REPORT WHICH CGN"T 4AP1 INFORMATION SHOWN ELSEWHERE ON THESE DRAVW W. OR WHICH REQUIRE FURTHER 01-AANTCARON, 914L BE BROUGHT TO THE ATTENTION 97 1LE SOILS ENGINIEM A REPRESENTATIVE FOR THE SO LS ENGINEER SHALL BE AVAR.ABLE TO OBSERVE AND APPROVE THE WWWOW OPERATIONS AND TO VERIFY FIFLQ CONDITIONS AS WOW PROCEEDS K 93U ENCCREER SHALL %WT FELD REPORTS CERTIFYING THAT THE NQNK WAS PERFORMED TO WE skrW CT10H OF THE EHGNEER. PRE CONTRACTOR 9ML MAKE ALL PROVISIONS FOR SOILS WI PECTORS AS RECOMMENDED VAAW SOILS REPORT. AS A MRRWUM. THIS W UDES THE OBSERVATIDN OF THE FOLLOMNC BY A SOPS FN 9DElt: PLACEMENT OF STRUCTURAL FILL MA'IERX BEQUEATH BUILIM13S AND PAVEMENT. 9118pRADE PREPARATION OF BUILDING THE CONTRACTOR SMALL allkn AHY UM+rAnONS to SOILS NHSPECTICNS WITHIN 810 PROPOSAL TRENCH NOTE r WORKERS ENTER ANY FRENCH OR OTHER ELCAVATION FOUR OR MORE FEET NA KPTM 114AT DOES NOT MEET THE OPEN PIT REQUIREMENTS OF WSOOT SECTION 2-09.3(3)B, 17 SHALL BE SHOWED AND D. THE CONTRACTOR ALCK SHALL. BE BESP'D qa_c FOR WORKER SAFETY AND 50 ASSUES W RESPONSBUTY. ALL TIENCH SAFETY SYSTEMS SHALL MEET THE RREQUIREMRRTS OF THE WASI4Y0CTDt1 V"SPNIAI SAFETY AND FAFALTH ACT, CHAPTER 4&17 RCW. BASIS OF BEARING CITY OF FEDERAL WAY SHORT PLAT NO. 02-101628-00-9A AS RECORDED UNDER RECORDING 0. 200L10279000DI. RECORDS OF KING COUNTY, WASHINGTON. FILL SPECIFICATION FILL MATERIAL SHALL NOT CONTAIN PETROLEUM PRODUCTS, OR SUBSTANCES WHICH ARE NA2ARDWS. DANGEROUS, TOXIC, OR WIWC11 OTROVASE VIOLATE ANY STATE. FEDERAL OR LOCAL LAW, ORDINANCE WOE, REGULATION, RULE, ORDER, OR STANDARD. CURRENT OWNER TOW SAWYER ENTERPRISES 2016 38TH ST. NW GIG HARBOR, WA 98335 UTILITIES WATER & SEWER: LAKEHAVEN UTIUTY DISTRICT POWER: PUGET SOUND ENERGY TELEPHONE: OWEST GAS: PU(ET SOUND ENERGY WATER NOTE WATER PLAN WAS DESIGNED IN COORDINATION WITH LARMAVBN OTT UTY DISTRICT. VERTICAL DATUM CITY OF FEDERAL WAY BENCH MARK NUMBER 2172-28-1 SE BOLT O4 SOUTH BOUND SIGNAL POLE BASE WEST SIDE OF PAC. HWY. S. AT DASH POINT ROAD SOUTH EL=421 95 NGVD-29 SITE BENCH MARK SOUTH BUT ON TOP FLANGE OF HYDRANT, LOCATED AT THE NORTHEST CORNER OF SITE AS SHOWN, ELEVATION = 459.90 SHEETINDEX C1 CGYEN SHEET/SITE /+LAN CS PREImARY W MAG PLAN C3 PREi. TRY ST m DRAM se PLAN C4 GENERAL NOTES AND DUALS CS GENERAL MOM AM DETALS GAi2DEMjfOOL 5HED 102 Sr PARCELP574400204 1 PARCaj3674400195 I I 1 5TAIRCASE ❑MMON GRAVEL GARDEN PATH r la PARCEL/367440090 m jM""�-3TAIRCASE �o a PARCEL13674400187 FLOOD PLAIN SITE OUTSIDE THE 100-YEAR FLOOD PLAN PER FEMA FLOOD MAP 53033C12351' UPDATED 5.1995 ARCHITECT MEDIA ARCHITECTS 2233 102ND PL SE BELLEVUE. WA 98004 SITE LOCATION 29812 18TH AVE s FEDERAL WAY, WA 98003 v 3 - r•1 �y �' 9r 'i EARTHWORK QUANTITIES Z28t CY CUT 504 CY TILL 1,777 NET CUT ��AHnRES_AIRE fOR PERMHr •Y _ VFRIc1' QUANTITIES FOR BIG_ PP RPM CALL 48 HOURS BEFORE YOU DIG 1-800-424-5555 VICINITY MAP N. T. S. LEGEND MONUMENTS AS NOTED WATER VALVE FIRE HYDRANTL WATER METER STORK DRAIN CATCH BASIN, TYPE 1 ■ STORM DRAIN CATCH BASIN, TYPE 2 Q DRAINAGE MANHOLE CLEAN OUT SANITARY SEWER MANHOLE QS SIGN POST UTIUTY POLE STORM DRAW UNE —SO— ROOF BRAIN LINE —RO— WATER UNE —W— FIRE SERVICE UNE SEWER UNE _SS_ RETAINING WALL CONTOUR �✓ FINISH GRADE ELEVATION TOP OF WALL VW) ELEVATION FINISHED (,RAGE (FG) ELEVATION SLOPE DIRECTION ARROW X.XX% CONCRETE PAVEMENT ASPHALT PAVEMENT PERVIOUS PAVEMENT (NRF STONE) FENCE — X — ?Av 1, ^"��z 0441 A�WUAL �SEI SOUND NGIN®tiNG, INC. WLL91®�Y+IAAp F1Al� am mnLela s11�r, 91DR 300 TAmMAWAO407 A1¢! lTul oA W L • N74701 d/i4w COTTAGES AT REDONDO COW: TOW SAWYER EPffERPRISES 2016 39TH ST. NW G4iwm%WA96[5 MCA) FAX: 94AIL PIO1tCF INGIN B: P. HUM ENAL dlele®IaudWglemll DRAYM:-611— ID QA y DATE YAE V-3K DATE:071LQO6 IRDTCT 1: 06WJ0 949Ef NAME. COVER SHEET/ SITE PLAN C1 RM I O 5 I 1102 Commerce St, Suite 300 ROUND Tacoma, WA 98402 Tom Sawyer —Cottage Housing Development WE" Bus: (253) 573-0040 ENGINEERING, InC. Fax: (253) 573-0142 Vicinity Map CIVIL ENGiNEERS - LAND PLANNERS sound@soundenginc.com 7) '79 X. Sao. 101ddle school Federal Park Way '021-1d S K,2nd Z l3th F i 02M Rand Wigiy O'NUR NAVE r d N Not to Scale LL j U. 5t ii Federal 29812 18th Ave. -way iJ 300tli U , 3010 : Mdiro 0 O� Elementary ,-o School iJ 3D .17tFl U_* n U .0, '302nd U, -7 LL CL S 304th St http://www.randmcnally. Legal Description THAT PORTION OF LOT 8, BLOCK 2, JEANNETTE SOUND VIEW TRACTS, ACCORDING TO THE PLAT THEREOF RECORDED IN VOLUME 44 OF PLATS, PAGE 68, IN KING COUNTY, WASHINGTON. BEING DESCRIBED AS FOLLOWS: THAT PORTION LYING EAST OF A LINE RUNNING SOUTH FROM A POINT 122.04 FEET EAST OF THE NORTHWEST CORNER OF SAID LOT. AND ALL OF LOT 9, BLOCK 2, JEANNETTE SOUND VIEW TRACTS, AS PER PLAT RECORDED IN VOLUME 44 OF PLATS, PAGE 68, IN KING COUNTY, STATE OF WASHINGTON. 1102 Commerce St., Suite 300 Tacoma, WA 98402 Tom Sawyer —Cottage Housing Development oulvD Bus: (253)573-0040 NGINEERIIVG, Inc. Fax: (253) 573-0142 USDA Websoilsurvey.nres.usda.gov/app/WebSoilSurvey. CIVIL ENGINEERS' LAND PLANNERS sound@soundenginc.com N Not to Scale http://websoilsurvey.nres.usda.gov/app/WebSoilSurvey. 1102 Commerce St., Suite 300 Tom Sawyer —Cottage Housin Development Tacoma, WA ss402g p ��IND Bus: (253) 673-0040 NGINMRING, Inc. Fax: (253) 573-0142 USDA Websoilsurvey.nres.usda.gov/app/WebSoilSurvey. CIVIL ENGWEWR I' LAND PLANNERS sound@soundenginc.com Alderwood gravelly sandy loam,15 to 30 percent slopes (AgD) Depth to the substratum in this soil varies within short distances, but is commonly about 40 inches. Areas are elongated and range from 7 to 250 acres in size. Soils included with this soil in mapping make up no more than 30 percent if the total acreage. Some areas are up to 25 percent Everett soils that have slopes of 15 to 30 percent, and some areas are up to 2 percent Bellingham, Norma, and Seattle soils, which are in depressions. Some areas, especially on Squak Mountain, in Newcastle Hills, and north if Tiger Mountain, are 25 percent Beausite and Ovall soils. Beausite soils are underlain by sand- stone, and Ovall soils by andesite. Runoff is medium, and the erosion hazard is severe. The slippage potential is moderate. This Alderwood soil is used for timber. Some areas on the lower parts of slopes are used for pasture. Capability unit VIe-2; woodland group 3dl. 1102 Commerce St., Suite 300 TSawyer—Cottage Housing p Develo ment 0 r ND Tacoma, WA 98402 Tom t [ Bus: (253) 573-0040 1VGINEERING, Inc. Fax: (253) 573-0142 USDA Websoilsurvey.nres.usda.gov/app/WebSoitSurvey. CIVIL ENGINEERS' LAND PLANNERS sound@soundenginc.com Arents, Alderwood material, 0 to 6 percent slopes (AmB) In many areas this soil is level, as a result of shaping during construction for urban facilities. Areas are rectangular in shape and range from 5 acres to about 400 acres in size. Representative profile of Arents, Alderwood material, 0 to 6 percent slopes, in an urban area, 1,300 feet west and 350 feet south of the northeast corner of Sec 23, T 25N, R 5E: 0 to 26 inches, dark -brown (IOYR 4/3) gravelly sandy loam, pale brown (IOYR 6/3) dry; massive; slightly hard, very friable, non- sticky, nonplastic; many roots; medium acid; abrupt, smooth boundary. 23 to 29 inches thick. 26 to 60 inches, grayish -brown (2.5Y 5/2) weakly consolidated to strongly consolidated glacial till, light brownish gray (2.5Y 6/2) dry; common, medium, prominent mottles of yellowish brown (IOYR 5/6) moist; massive; no roots; medium acid. Many feet thick. The upper, very friable part of the soil extends to a depth of 20 to 40 inches and ranges from dark grayish brown to dark yellowish brown. Some areas are up to 30 percent included soils that are similar to this soil material, but either shallower or deeper over the compact substratum; and some areas are 5 to 10 percent very gravelly Everett soils and sandy Indianola soils. This Arents, Alderwood soil is moderately well drained. Permeability in the upper, disturbed soil material is mod- erately rapid to moderately slow, depending on its compaction during construction. The substratum is very slowly permeable. Roots penetrate to and tend to mat on the surface of the consolidated substratum. Some roots enter the substratum through cracks. Water moves on top of the substratum in winter. Available water capacity is low. Run- off is slow, and the erosion hazard is slight. This soil is used for urban development. Ca - pability unit IVe-2; woodland group 3d2. 1 J J Trip Planner - Stop Information Stop Information for Pacific Hwy S & 18th Ave S The stop is on the first street at or near the second street or landmark. See below for more details about Tunnel Stations, Bays and Bus Time numbers. Area FEDERAL WAY/AUBURN Direction and Position Northbound / After the cross street or landmark Shelter No Routes serving stop MT 173-I, MT 174-I, MT 175-1 Accessibility Fully accessible Comment stop is East side, far Route # Direction Route MT 173 Inbound Route MT 174 Inbound Route MT 175 Inbound Bus Time Stop Number 7299 7299 7299 Tunnel Stations: The Downtown Seattle Transit Tunnel has five stations with four or more lettered stops, called Bays. The stations are International District Station, Pioneer Square Station, University Street Station, Westlake Station, and Convention Place Station. See the Tunnel map for station locations and other information. Bays: Besides the Tunnel, many Transit Centers, park and ride lots, and other transportation hubs have multiple stops, or bays. Bay designations are clearly marked on signs at the stops where they apply. Bus Time Stop Plumbers are used by the Bus Time (phone) system to provide the scheduled departure times of buses at bus stops. These numbers are available for Metro Transit -operated routes only. For more information see Bus Time information For more information about these results see Trip Planner Tips - Detailed stop information http://tripplanner.metroke. gov/cgi-bin/stop_info.pl?Id=6859&resptype=U m 'o you �o'mv q v o E E LL w g a 2s �� IRSu1 Z w } wF $ Q 2c ❑ C o o H C) U Q�❑ r,J o 7 3 u �° UELU ppEa o u .E< �5y n X O R E E v U a. IL c O p sNIL «c8E " E S @ ammo �iaaa m N N lLLk 1YZ M U N� s W w N wµ -7 gy p¢Q a a M H r �1 4J M ] O N V� h s 3()N�AV UNZa ° :_� • � AINnop `JNIN _ .lbM IVU3033 30 ALIT — S anlv3nd Isis zw — W � N N N ono$ F- T U3 x w w � Z a N y a 'N y x h 0 N x m m N Z H CV AVMHJIH OHI:>Vd LSD LL CT m LOP In co 0 pol .., \X G U 7 d �� t��Q� G` co o l 9ZZ, �o`L S AV 1-3 t' N �ti cn coCf) c)U) U) Sld9Z� :. AV 9Zco Id S ld 9Z . rn Cf) 0 "7 �i SIdtlZ SldbZ � 2425C S AV tZ _ ti 5 Imv, snVsz � S AV zz i I C� S �d 2 S AV 2 L � m I can' � IL S nd �Z M'co Cl) S AV tZ U) U! 0 u) CL AV OZ a. S AV OZ a co N, �Y Sld6l S sj rn 6 AV 6 L (D CD rn F- N (n N C/) f1) S AV 8 G LO SnV9G - SAV9l - Q - �- e N c p =QEr; S1o9G Q` �; s nV � s nV L f � N sCD 0 ru cn o 11 cn PLS Sid Ll M L cn No l � o- od" can S AV 0l s/lv S e� �\ N 70 8 PL5 9 U g oF- Cl) Cl) (n Cn Co (n CO It r S AV 9 .. V(S Ni ��, 5f N AV ' C/)' rDN - • 1§1 L � �� sAV t6 AV g; o co S F- o �� ry creek c • N �' "' t `� E .tl�C� ...r ' - - N S AV 9 r �-- December 5, 2005 SUBSURFACE EXPLORATION AND GEOTECHNICAL ENGINEERING REPORT Sawyer 2981218th Avenue So Federal Way Parcel#:3674400135 Prepared for Tom Sawyer Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Project: 2981218'h Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 Tom Sawyer 2016 38th ST. NW Gig Harbor WA. 98335 Project Address: 2981218th Avenue So Parcel #: 3674400145 Re: Subsurface Exploration/Geotechnical Engineering Report Attn: Mr. Sawyer: At your request, we have conducted a soils exploration and foundation evaluation for the above mentioned project. The results of this investigation, and our recommendations, are to be found in the following report. We have provided three copies for your review and distribution. During our exploration, two test pits were advanced and soil samples submitted for laboratory testing from the project site. The data has been carefully analyzed to determine soils bearing capacities and footing embedment depths. The results of the exploration and analysis indicate that conventional spread and continuous wall footings appear to be the most suitable type of foundation for the support of the proposed structures. Little variability was encountered in comparing the soil profiles of the site. Net allowable soil pressures, embedment depth, soil parameters, and total expected settlements have been presented for the site, later in the report. Often, because of design and construction details that occur on a project, questions arise concerning soil conditions. We would be pleased to continue our role as geotechnical engineers during the project. We appreciate this opportunity to be of service to you and we look forward to working with you in the future. If you have any questions concerning this report, the procedures used, or if we can be of any further assistance please call us at (206) 786-8W. Respectfully, JASON ENGINEERING & CONSULTING BUSINESS, INC Jason E.C. Bell, P.E. President PO Box 181 Auburn WA. 98071 Page 2 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe®yahoo.com Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Project: 29812180i Ave. So, — Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 Table of Contents Table of Contents 3 Introduction: _ _ 4 Scope: — _ _ 4 General: 4 _ Site Exploration Procedures 5 General Notes: 5 Drilling & Sampling Procedures: 5 Laboratory Testing Program: 5 Site Information 6 Project Description 6 Geology of Area: (AmB) Alderwood 6 Climate of Area: 6 Description of Foundation Materials: 6 Geoseismic Setting: 7 Liquefaction Potential: 7 Foundation Discussion & Recommendations 9 General Notes: 9 Foundation Design Recommendations: 9 Structural Fill:. 10 Lateral Earth Pressures: 10 Groundwater Control: 10 Slope Stability Modeling & Analysis: 11 Construction Considerations 12 Earthwork: 12 Excavations: 12 Floor Slab -On -Grade: , 12 Conclusion 13 Appendix I: Test Pit Logs 14 Log #1 14 Log #2 14 Appendix II: Additional Site Photos 15 Appendix III: Figures 16 Vicinity Map 16 SCS Soil Survey Information 16 Slope Stability, Static FS = 2.06 17 Slope Stability, Dynamic FS =1.79 18 Site Plan 19 PO Box 181 Auburn WA. 98071 Page 3 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com I I J Jason OVEngineering & Consulting Business, Inc. Investigation Information Geotechnical Engineering I Date: 12-5-2005 Retaining Structures Project: 2981218ei Ave. So, Foundations Sawyer Pavement Design & Analysis Filet 05001-110 Introduction: This report presents the results of a soils exploration and foundation analysis for the proposed new construction located at 2981218th Avenue South in Federal Way, WA. The subsurface exploration and analysis determines the various soil profile components, the engineering characteristics of the foundation materials and provides criteria for the design engineers and architects to prepare or verify the suitability of the foundation design. This report was requested by Tom Sawyer. Written authorization to perform this exploration and analysis was provided by Tom Sawyer. Scope: The scope of this geotechnical report and analysis included; a review of geological maps of the area, review of geologic and related literature, a reconnaissance of the immediate site, subsurface exploration, field and laboratory testing, and an engineering analysis and evaluation of the foundation materials to provide allowable bearing capacity, estimates of settlement, subgrade modulus, lateral earth pressure design values, geotechnical recommendations for site grading including site preparation, subgrade preparation, fill placement criteria, suitability of on -site soils as structural fill, drainage and erosion control measures, as well as an evaluation of landslide and erosion hazards at the site per the King County Critical Areas regulations. We were not requested to provide an Environmental Site Assessment for this property. Any comments concerning onsite conditions and/or observations, including soil appearances and odors, are provided as general information. Information in this report is not intended to describe, quantify or evaluate any environmental concern or situation. General: The exploration and analysis of the foundation conditions reported herein are considered sufficient in detail and scope to form a reasonable basis for the foundation design. Any revision in the plans for the proposed structure from those enumerated in this report should be brought to the attention of the soils engineer so that he may determine if changes in the foundation recommendations are required. If deviations from the noted subsurface conditions are encountered during construction, they should also be brought to the attention of the soils engineer. The soils engineer warrants that the findings, recommendations, specifications, or professional advice contained herein, have been promulgated after being prepared according to generally accepted professional engineering practice in the fields of foundation engineering, soil mechanics and engineering geology. No other warranties are implied or expressed. This investigative report has been prepared for the exclusive use of Tom Sawyer and retained design consultants thereof. Findings and recommendations within this report are for specific application to the proposed project. All recommendations are in accordance with generally accepted soils and foundation engineering practices. PO Box 181 Auburn WA. 99071 Page 4 of 19 Phone: 206-786-8645 Fax 253-833-7316 Email: jecbpe®yahoo.com 1` Jason Geotechnical Engineering Date: 12-5-2005 OVEngineering & Retaining Structures Project 2981218ei Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 Site Exploration Procedures General Notes: The field exploration to determine the engineering characteristics of the foundation materials included a reconnaissance of the project site, excavating the test pits, performing field penetrometer and vane shear tests and recovering disturbed grab samples. A total of two test pits were placed an the site, Test pits were advanced to 6 to 10 feet below the existing ground surface. Test pits were located by the Field crew near as possible to the proposed building location. Sadler and Bernard Surveyors supplied a site plan to locate the proposed building orientation and position the excavations. The test pits were located by the field technician by means of normal taping and pacing procedures and are presumed to be accurate to within a few feet. After completion, the pits were backfilied with excavated soils and the site cleaned and leveled as required. The types of foundation materials encountered in the test pits have been visually classified and described in detail on the logs provided in the Appendix. The results of the field penetrometer and vane shear tests, moisture contents and other laboratory tests are presented on the logs. It is recommended that the logs not to be used for estimating quantities due to highly interpretive results. Drilling & Sampling Procedures: The test pits were performed with a conventional track excavator. Representative samples were obtained from the pits at various soil intervals. The samples obtained by this procedure were classified in the field by a soils technician, identified according to pit number and depth, placed in plastic bags to protect against moisture loss and transported to the laboratory for additional testing. Laboratory Testing Program: Along with the field investigation, a supplemental laboratory besting program was conducted to determine additional pertinent engineering characteristics of the foundation materials necessary in analyzing the behavior of the proposed building structure. The laboratory testing program included supplementary visual classification and water content determinations on all samples. In addition, selected samples were subjected to Moisture Content Analysis - D4959, and Grain Size Analysis - ASTM designation C-117, C-136. All phases of the laboratory testing program were conducted according to applicable ASTM Specifications and the results of these tests are to be found on the accompanying logs located in the Appendix. PO Box 181 Auburn WA. 98071 i Page 5 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com Jason Geotechnical Engineering Date: 12-5-2005 JAEngineering & Retaining Structures Project. 298121811' Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 Site Information Project Description The purpose of this section is to enumerate details of the proposed structure. The following information was provided by the project owner. The lot is to be sub divided in to three lots for new construction. The buildings will be wood framed, single family residence structures. No basements are planned. Conventional spread footings and slab -on -grade floors are contemplated. The farthest lot to the east may be best suited to a daylight basement type structure in order to maximize the usable area of the lot. Differential settlements are limited to 3/4 inch. The site of the proposed building addition upon which this soils exploration has been made is located at 29812 18th Avenue South in Federal Way, WA. There is an existing house on the lot that will be removed. The site topography consists of mostly flat ground area on the west and middle portions of the site with a slight slope on the east side of the lot. This eastern slope was measured at 17%. The site drainage consists of city maintained storm drainage and sanitary sewer. The site vegetation is mostly grass, small shrubs and blackberry bushes in the west and middle portions. There are a few trees in the middle and eastern portions of the lot, mostly conifers with a few maples. Prior grading has not occurred Geology of Area: (AmB) Alderuwood The geology of the site and surrounding area as taken from the USDA Soil Conservation Service Survey consists of Arents, Alderwood material, 0 to 6 percent slopes (AmB). Soil is dark brown to pale brown, gravelly sandy loam. The upper, very Friable part of the soil extends to a depth of 20 to 40 inches and is non -plastic, non sticky and contains roots. Below this layer is weakly consolidated to strongly consolidated glacial till. The till is light brownish gray, no roots, many feet thick. The Arents, Alderwood soil is moderately well drained. Permeability in the upper, disturbed soil is moderately rapid to moderately slow, depending on its compaction during construction. The substratum is very slowly permeable. Roots tend to penetrate to and mat on the surface of the consolidated stratum. Water moves on top of the stratum in winter. Available water capacity is low. Runoff is slow, and the erosion hazard is slight. Climate of Area: The climate of the site and surrounding area as taken from the USDA Soil Conservation Service Survey consists of annual precipitation from 35 to 60 inches, most of which is rainfall, between October and May. The mean annual air temperature is about 50 degrees F. The frost free season is 150 to 200 days. Elevation ranges from 100 to 800 feet. Description of Foundation Materials: J The soil profiles encountered were relatively consistent among the two pits and are typical of what is expected in the area. The literature found in the Soil Conservation Surveys is consistent with the material found on site. It is to be noted that, whereas the test pits ,j were placed and sampled by an experienced technician, it is sometimes difficult to record changes in stratification within narrow limits. In the absence of foreign substances, it is also difficult to distinguish between discolored soils and clean soil fills. It is recommended that the logs not to be used for estimating quantities due to highly interpretive results. The surface of the proposed construction site is covered with 6 to 12 inches of topsoil that should be removed prior to the start of any construction due to the high compressibility of PO Box 181 Auburn WA. 98071 Page 6 of 19 JPhone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe®yahoo.com J - - ij Jason Engineering & Consulting Business, Inc. Geotechnical Engineering Retaining Structures Foundations Pavement Design & Analysis Date: 12-5-2005 Project: 298121811, Ave. So, Sawyer File #: 05001-110 these soils. Strongly consolidated glacial till layers were encountered beneath the existing topsoil and extended to depths beyond the scope of this investigation. Lines of demarcation represent the approximate boundary between the soil types, but the transition may be gradual. The top layer of the soils ranged from 2 to 4 feet in depth and consisted of brown silty sand with gravel. There were many roots in this layer. Some areas exhibited orange stains and slight mottling. The second layer was strongly consolidated glacial till. It was grayish brown and very dense. Two other test pits were excavated on the adjacent lot. All pits are in agreement with expected soil types and were similar in content. Mottled soil indicates seasonal soil saturation (alternate oxidizing and reducing conditions). In other words, water flows through this layer periodically creating a saturated soil condition at times and at other times the soil may be - dry. This can create a soft, saturated yard area, problems for basements and septic fields, and poor aeration for landscape plantings. A soil "mottled" in the top 18 inches of its profile has both oxidized (rust -colored) iron and reduced (gray -colored) iron present. The gray (reduced) iron suggests prolonged water-logged conditions. Implementation of a perimeter footing drains should alleviate many difficulties associated with these soil conditions. Geoseismic Setting: This project site is located within a "Zone 3 Area" per the 1997 edition of the Uniform Building Code, classified as type Sc per the 1997 U.B.C. Table 16-J. Per the 2000 International Building Code (I.B.C.) these soils are a Site Class C, from Table 1615.1.1. All building structures on this project should be designed per the Code Requirements for such a seismic classification. These types of soils have a shear wave velocity in the range of 1,200 to 2,500 ft/sec 1 and an undrained shear strength greater than 2000 psf with blow counts greater than 50 blows per foot. The following may be used for the seismic coefficients. Design Response Spectrum 120.00 — 100.00 60.00 8 x 60.00 - • .� .. 40.00 - N 0.00 0.00 020 0.40 0.60 OAD 1.00 1.20 1.40 Period, T Liquefaction Potential: Seismic Coefficient Z=0.3 _Ca �T C� 0.33 0.45 Period, T Sa 0 0.00 40.00 To 0.05 100.00 Ts 0.26 100.00 1 1.00 26.00 2 2.00 13.00 Liquefaction is when saturated, cohesionless soils are temporarily tamed in to a liquid state usually from a seismic event. If ground motion lasts for extended amounts of time, the grain to grain contact shifts and the grain structure can collapse. If the water within the soil cannot flow easily between the grain and out of a collapsing area, the water pressure increases. When pore pressures build up within the soil and exceed the effective contact pressure of the soil, the water can push the soil particles apart. When the particles lose contact with each other, the soil mass can behave like a liquid. If pore pressures are great enough, water may discharge out of the ground like a geyser leaving characteristic signs, such as sand boils. Liquefaction is generally related to; soil characteristics, water table depths and the degree of seismic activity. The results are lower bearing capacities, increased settlement issues, landslides, and lateral spreading to name a few things. Liquefaction potential for this site is provided within the ` boundaries of the site. Seismic events which affect land masses on a greater scale are beyond the scope of this J report. PO Box 181 Auburn WA. 98071 Page 7 of 19 j Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com Jason Geotechnical Engineering Date: 12-5-2005 �-- Engineering & Retaining Structures Project: 2981218ei Ave. So, 00"� Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 In our review we found no evidence of liquefaction of the soils in the immediate area from the 1949,1965 and 2001 earthquakes. The Liquefaction Susceptibility Map of King County Washington provided by the Department of natural Resources classifies the area as LOW to VERY LOW. We therefore consider the site to have a LOW susceptibility to liquefaction and have used this information within our design recommendations. Vi EX P1,A\:1Y"l0\ i �., I J Ligoelection st: ccptibility: HKiH �.� j z S _ r s yl�TH,ST F .. Llgccigca5on waccptitr'ley: MODERA7Em HIGH ! ! ' -: �, l 167 � p ❑ Ligo:factim acsccobility: MODERATE - 9 �' �'• ❑ L*cFactim msca#ibdllty- LOW to MODEI AT Liqw[actioascfbility:LOW Federal Ligwfwtioa stcK pabilky. VERY LXYW b LOW Ji r 1 its Liguactios► s>Bcgsibility. VERY LOWLl f � ` �� 3 '. '' `� ■ PO Box 181 Auburn WA. 98071 JPhone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com i Page 8 of 19 Jason Geotechnical Engineering Date: 12-5-2005 OUEngineering & Retaining Structures Project: 29812181' Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 Foundation Discussion & Recommendations General Notes: Various foundation types have been considered for the support of the proposed building structure. Two requirements must be fulfilled in the design of foundations. First, the load must be less than the ultimate bearing capacity of the foundation soils to maintain stability; and secondly, the differential settlement must not exceed an amount that will produce adverse behavior of the superstructure. The allowable settlement is usually exceeded before bearing capacity considerations become important; thus, the allowable bearing pressure is normally controlled by settlement considerations. Considering the subsurface conditions and the proposed construction, it is recommended that the structure be founded upon conventional spread and continuous wall footing foundations. Settlements should not exceed tolerable limits if the following design and construction recommendations are observed. Foundation Design Recommendations: On the basis of the data obtained from the site and the test results from the various laboratory tests performed, we recommend that the following guidelines be used for the net allowable soils bearing capacity. All footings are to be excavated to native undisturbed glacial till soils. Footings are required to be a minimum of 18 inches below grade for freeze thaw purposes. After excavation, compact any loose surface soils with a jumping jack compactor. These soils shall be verified by the soils engineer after excavation. ?V Confirm bearing capacity of the native soils and that all soft spots have been removed and replaced with suitable fill material and compacted to least 95% of the maximum dry density as determined by ASTM D- 1557. t* Continuous wall footings should be a minimum of 16 inches in width and any slab for the proposed building should be suitably reinforced and connected to the footings so as to limit the effects of differential settlement and to provide some degree of uniform settlement ability for the building should the site undergo liquefaction during a major seismic event. Footing Depth: is inches Footing Width: 16 inches Cn•ound surface Net Allowable Beming: 2.000 PSF III=I I I=1 I Stmowal till material compacted 18.0 in nun =III -III- to 95% of m&x density. _ required for III- I I -III pet imetes FootiugDrain freezeitlmwrPesforated, 6 iuchpipe 16.0 in Native Soil PO Box 181 Auburn WA. 98071 Page 9 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe®yahoo.com Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Project: 298121811` Ave. So, Consulting Foundations Sawyer A01T= Business, Inc. Pavement Design & Analysis File #: 05001-110 The footings should be proportioned to meet the stated bearing capacity and/or the International Building Code 2003 minimum requirements. Total settlement should be limited to 1 inch total with differential settlement of 3/4 inch. Any excessively loose or soft spots or areas that do not meet the compaction requirements that are encountered in the footing subgrade will require over -excavation and backfilling with at least 1 foot of structural fill. In order to minimize the effects of any slight differential movement that may occur due to variations in the characters of the supporting soils and any variations in seasonal moisture contents, it is recommended that all continuous footings be suitably reinforced to make them as rigid as possible. Structural Fill: Structural fill should consist of a 3 inch minus select, clean, granular soil with no more than 5% fines (4200). Suitable structural fill should consist of material that meets one of the following specifications, WSDOT Section 9- 03.10 Aggregate for Gravel Base, WSDOT Section 9-03.14(1) Gravel Borrow, WSDOT Section 9-03.14(2) Select Borrow, WSDOT Section 9-03.9(3) Crushed Surfacing (Base Course Specs), WSDOT Section 9-03.9(3) Crushed Surfacing (Top Course Specs), APWA Class A Pit Run, or APWA class B Pit Run. Material that does not meet one of the specifications should be submitted with sieve analysis results for approval prior to placement. The fill should be placed in lifts not to exceed 12 inches in loose thickness. Each layer of structural fill should be compacted to a minimum density of 95 % of the maximum dry density as determined by ASTM designation D-1557. For structural fill below footings, the area of the compacted backfill must extend outside the perimeter of the foundation for a distance at least equal to the thickness of the fill between the bottom of the foundation and the underlying soils, If it is elected to utilize a compacted backfill for the support of foundations, the subgrade preparation and the placing of the backfill should be monitored continuously by a qualified engineer or his representative so that the work is performed according to these recommendations. The use of on -site soils as structural fill is acceptable. If these soils are to be used for structural fill, laboratory samples will need to be taken for grain size analysis and moisture -density relationships. Lateral Earth Pressures: Lateral earth pressures are dependent upon the backfill materials and their configuration and moisture content. Three inch minus sand and gravel mixtures that are free draining are recommended for backfilling walls greater than four feet tall. Below grade retaining walls or walls designed for retaining earthen fills on this project may use the following values for design. Values were obtained based on a unit weight of 130 pcf, and a phi angle of 34 degrees. Earth Pressure Coefficients Active, Ka: 0.283 At Rest, K.: 0.441 Passive, Kp: 3.537 Groundwater Control. Earth Pressure Active: 37 lbs./ ft3 At Rest: 57 lbs./ft3 Passive: 460 lbs./ft3 Coefficient of Friction: 0.40 Groundwater was not encountered when the field exploration was conducted. Groundwater is not expected to cause difficulties during construction of this project. It is recommended that runoff caused by wet weather be directed away from all open excavations. The on -site surface silty soils can be expected to become soft and pump if subjected to excessive traffic after becoming wet during periods of bad weather. This can be avoided by constructing temporary or permanent driveway sections should wet weather be forecast The on -site drainage (roof drains & catch basins for pavement areas) should be collected and directed away from the property. This can be accomplished by tight -lining the drainage to the on site city maintained storm drainage system. PO Box 181 Auburn WA. 98071 Page 10 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com I Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Project: 2981218ei Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 Retaining walls should contain at least 12 inches of free draining material behind the wall as well as a 6 inch perforated drainpipe at the bottom of the wall to alleviate any pressure buildup. Connect the drainpipe to the on site storm drainage system. Slope Stability Modeling & Analysis: Slopes may fail by a number of mechanisms, depending on the nature of the soil involved and the arrangement of ~� natural earth materials at the site in question. slope failures occur because forces tending to cause instability exceed those tending to resist it. Generally, the driving forces are represented by a component of soil weight down slope, and the resisting forces are represented by the soil strength acting in the opposite direction. The factor of safety -� (FS) of the slope is expressed as the ratio of the resisting forces or "moments" to the driving forces or "moments". When the FS is 1 or less, the slope must fail. When the FS exceeds 1, the slope is theoretically stable. When estimating the FS for the slopes encountered, we considered the following types of information: 1) The soil and water profiles. 2) The kinematics of the potential slope failure. 3) The strength and weight of the soil. _ 4) The proposed slope geometry. 5) Static and seismic (dynamic) loading conditions. The site was modeled using Geo-Slope's Slope/ W program (version 2004) and we have included profiles of the model later in this report. A ground acceleration of 0.15g was used in both the vertical and horizontal direction for the dynamic loading conditions. We have calculated various scenarios and have found that the site shows no indications of any deep seated instability of the slope under either static or dynamic loading. The minimum safety factors in both static and dynamic conditions exceed the minimum standards to be considered a stable slope. Over time, there may be small surface failures on the slope due to heavy rainfall and loose topsoil. We do not anticipate that the proposed residential structure and construction of the project will have any off -site impacts. The site is stable enough to support the proposed residential construction within the recommendations made herein. There were no signs of previous slope instability or failures. PO Box 181 Auburn WA. 98071 I Page 11 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe®yahoo.com II M Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Project: 298121811, Ave. So, Consulting Foundations Sawyer wz�nj Business, Inc. Pavement Design & Analysis File #: 05001-110 Construction Considerations Earthwork Excessively organic top soils generally undergo high volume changes when subjected to loads. This is detrimental to the behavior of pavements, floor slabs, structural fills and foundations placed upon them. It is recommended that excessively organic top soils be stripped from these areas to depths of 6-12 inches and wasted or stockpiled for later use. Exact depths of stripping should be adjusted in the field to assure that the entire root zone is removed. It is recommended that the final exposed subgrade be inspected by a representative of the soils engineer. This inspection should verify that all organic material has been removed. Any soft spots or deflecting areas should be removed to sound bearing and replaced with structural fill. Once the existing soils are excavated to the design grade, proper control of the subgrade conditions (i.e., moisture content) and the placement & compaction of new fill (if required) should be maintained by a representative of the soils engineer. The recommendations for structural fill presented within this report, can be utilized to minimize the volume changes and differential settlements that are detrimental to the behavior of footings, and floor slabs. Enough density tests should be taken to monitor proper compaction. For structural fill beneath building structures one in -place density test per lift for every 1,000 ftz is recommended. In parking and driveway areas this can be increased to two tests per lift for every 1,000 ft2. Excavation equipment may disturb the bearing soils and loose pockets can occur at bearing levels that were not disclosed by the test pits. For this reason, it is recommended that the bottoms of the excavations be compacted in - place by vibratory compactors. The upper 12 inches should be recompacted to achieve an in -place density of not less than 95% of the maximum dry density as determined by ASTM D-1557. Excavations: Shallow excavations required for construction of foundations that do not exceed four feet in depth may be constructed with side slopes approaching vertical. Below this depth it is recommended that slopes not exceed one vertical to one horizontal. For deep excavations, the soils present cannot be expected to remain in position. These materials can be expected to fail, and collapse into any excavation thereby undermining the upper soils materials. This is especially true when working at depths near the water table. Proper care must be taken to protect personnel and equipment. Care must be taken so that all excavations made for the foundations are properly backfilled with suitable material compacted according to the procedures outlined in this report Before the backfill is placed, all water and loose debris should be removed from these excavations. This information is provided for planning purposes. It is our opinion that maintaining safe working conditions is the responsibility of the contractor. Jobsite conditions such as soil moisture content, weather condition, earth movements and equipment type and operation can all affect slope stability. All excavations should be sloped or braced as required by applicable local, state and federal requirements. Floor Slab -On -Grade. - Before the placing of concrete floors or pavements on the site, or before any floor supporting fill is placed, the organic, loose or obviously compressive materials must be removed. The subgrade should then be verified by the geotechnical engineer or his representative that all soft or deflecting areas have been removed. Areas of excessive yielding should be excavated and backfilled with structural fill. PO Box 181 Auburn WA. 98071 Page 12 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Project: 2981218th Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis File #: 05001-110 Any additional fill used to increase the elevation of the floor slab should meet the requirement for structural fill. Structural fill should be placed in layers of not more than 12 inches in thickness, at moisture contents at or above optimum, and compacted to a minimum density of 95% of the maximum dry density as determined by ASTM designation D-1557. A granular mat should be provided below the floor slabs. This should be a minimum of four inches in thickness and properly compacted. The mat should consist of sand or a sand and gravel mixture with non -plastic fines. All material should pass a 3/4 inch sieve and contain less than 10% passing the #200 sieve. Groundwater can be expected at shallower depths during the winter months. A moisture barrier, such as visqueen or plastic sheeting, should be placed beneath all floor slabs. Conclusion When the plans and specifications are complete, or if significant changes are made in the character or location of the proposed structures, a consultation should be arranged to review them regarding the prevailing soil conditions. Then, it may be necessary to submit supplementary recommendations. It is recommended that the services of our firm be engaged to test and evaluate the soil conditions during the construction phase of the project The design values and recommendations made herein are valid only insomuch as they are followed during the construction phase. Additionally, monitoring and testing during the construction phase needs be performed to verify the subgrade conditions and that suitable materials are used and that they are properly placed and compacted. While the recommendations made herein are considered sufficient in detail for the construction of the proposed project, there are many alternative methods of construction which are available. We can discuss various other options for construction at your request. PO Box 181 Auburn WA. 98071 Page 13 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe®yahoo.com Jason Engineering & Consulting OfA Business, Inc. Appendix I: Test Pit Logs Log #1 Geotechnical Engineering Date: 12-5-2005 Retaining Structures Pr_ *ct: 2981218ei Ave. So, Foundations Sawyer Pavement Design & Analysis File #: 05001-110 Boring ID: SP-1 Method of Sample: Track Excavator Date of Excavation: 11-9-2005 Surface Elevation (ft): 465 Project Name: Sawyer Total depth (ft): 10 File #: 06001-110 Technician: JECB Depth(ft): Profile SPf (1) Moisture Percent passing Sample 17es. riplinn (feet) (meters) USCS (blows/ft) % 3/4" #4 1 #200 Type 1 0.30 2 0.61 GM 82 57 20 brown sandy gravel, med dense 4 1.22 Cy34i 88 64 26 silty gravelly sand, med dense 5 1.52 - 1 6 1.83 1 7 213 GM 79 58 24 brawn, silty sand w/ gravel 8 2.44 I ` very dense, till 9 —74 10 3.05 — — End Baring Log #2 Boring ID: SP-2 Method of Sample: Track Excavator Date of Excavation: 11-9-2005 Surface Elevation (ft): 465 Project Name: Sawyer Total depth (ft): 10 File #: 06001-110 Technician: JECB Depth(ft): Profile SPT (1) Moisture Percent passing Sample Description 3/4" #4 #200 (feet) (meters) USCS (blows/ft) % Type 1 0.30 2 0.61 GM 82 57 20 brown sandy gravel, med dense 3 0.91 4 1.22 5 1.52 6 1.63 - - - - -. 7 2.13 GM 79 58 24 brown, silty sand w/ gravel --- ---- --. _ - J.. B 2.44 very dense, till 9 2.74 �— 10 3.05 End Boring PO Box 181 Auburn WA. 98071 I Page 14 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Projeck 298121811` Ave. So, Consulting FoundationsI Sawyer Business, Inc. Pavement Design & Analysis I File #: 05001-110 Appendix II: Additional Site Photos 1: Test pit #1. Roots in the upper horizon layer. 2: Test pit #1. Very dense glacial till below 2 Very dense glacial till below 2 feet. feet. PO Box 181 Auburn WA. 98071 Page 15 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe®yahoo.com Jason Engineering & Consulting Business, Inc. Appendix III: Figures Vicinity Map Geotechnical Engineering Date: 12-5-2005 Retaining Structures Project: 298121811, Ave. So, Foundations Sawyer Pavement Design & Analysis File #: 05001-110 op - 3 L .L N - a-• 41 i 1 ' ,tip i� � •T � �� '• �� 31 Y [r. r... �.ewM WWW��CCCIII SCS Soil Survey Information PO Box 181 Auburn WA. 98071 Page 16 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com Jason Engineering & Consulting Business, Inc. Slope Stability, Static FS = 2.06 Geotechnical Engineering Date: 12-5-2005 Retaining Structures Project: 298121811, Ave. So, Foundations Sawyer Pavement Design & Analysis File #: 05001-110 3.60 • • 2.Ou S.iE • o18 • ]a37 ^6 • i ��S{QJ°fI 335 • • ■ • g 3 • • .141L 80.01 • 367 IL7J 3.75 s • r 1 ; ab7 9:.Si • � s.is • • 1 a.ss • • � .s- x .'A ■ 1 15:10 :05.30 � Is.a � • � ,a7 � •, • 17. 1 . 131.33 3-51 •S.•1 011.52 � 50.90 • iC ao6 7.4s • c • 66 Il 5.42 65.ae 510 • yr` 17.43 653A0 S00 490 d40 • • I5.51 • a ii • ]63? Il • • aa'} f • 1562 aL • • 20.10 • iAl 06 Is o ` .218E s.n 28.6i • SO• • ae..a • • 3.40 • 69.L2 • $J Q0 0 20 40 60 80 100 120 140 160 180 200 220 240 2W 280 300 020 UO 380 nO 400 420 440 480 Distance: Ft The lowest factor of safety was 2.06 in the analysis. The potential slippage was barely visible on the surface of the slope and only in the upper layers. Some surface raveling is to be expected but there are no indications of any deep seated instability. PO Box 181 Auburn WA. 98071 I Page 17 of 19 Phone: 206-786-8645 Fax: 253-933-7316 Email: jecbpe®yahoo.com Jason Geotechnical Engineering Date: 12-5-2005 OVEngineering & Retaining Structures Project: 298121811, Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis IFile #: 05001-110 SIope Stability, Dynamic FS =1.79 • .33 1.' 3 faa0 ; 3{ 3^_ f1.45 •+ 90 � ,- I • 3°1 f :3 ? 6p ■ •237 • • Rl • � 2-n • ` LW 1 u.r • .25 ♦ V • ♦°' a3`{ 11S • i a 79 • L. 1.' 3' It•� as 2.36 • • .39 3. ♦ •- 06 Z • • e.11 . a: L74 ?31 • .642 6.5+ rA0 • 490 LL 490 � � p ■ s 4B0 � i x'.• _ .. age 0 20 40 60 SU 1U0 12U 140 160 180 200 220 zoo 2W 280 300 320 310 300 000 400 420 440 M Distance, Ft The lowest factor of safety was 1.31 in the analysis. The potential slippage was barely visible on the surface of the slope. The factor of safety shown above is 1.79 with minimum slippage still slightly visible and only in the upper layers. Some surface raveling is to be expected but there are no indications of any deep seated instability. PO Box 181 Auburn WA. 98071 Page 18 of 19 Phone: 206-786-8645 Fax: 253-833-7316 Email: jecbpe@yahoo.com Site Plan Jason Geotechnical Engineering Date: 12-5-2005 Engineering & Retaining Structures Project 2981218th Ave. So, Consulting Foundations Sawyer Business, Inc. Pavement Design & Analysis Filet 05001-110 PO Box 181 Auburn WA. 98071 Phone: 206-786-8W Fax 253-833-7316 Email: jecbpe§yahoo.com Page 19 of 19 18th AVEN � w x g'VA7 S 12 5g'47,. 861.86' REC. o F 92.35c O o tss 92.3E • o 0911 U) ! 00 N o m o 41 cD J w r Z O � ` N 00' 0'00" E J•w -P� (0 rn N 4Sg �� z 6? 00 tD r Ci O J � w r O Cn N (O Ca j t J N w �- f� .., w m r � 8St > 460 462 464 , f o 466 _. w - -. 468 - m m --- - - 470 - - .. - 472- 474- - 181. 6' trSt OF 1 X2 E 488 x odd 0 TOM SAWYER, SHORT PLAT on = £ m '9.� loan 29812 18th Avenue So o Ft i V d o Federal Way, WA Phone: (253) 606-5184 e g o Parcel #: 3674400145 tb O N Geotechnical Engineering ]aeon Retaining Wells Engsin tg & Foundations Consultulting Pavement Design & Analysis Business, Inc PO Box 181 Auburn WA. 98071 Phone: (206) 786-Wa45