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19-105869
Y CITY OF �- Federal Way &>)t�r`- on Opportunity Eunhee Kim 37325 811, Avenue South Federal Way, WA 98003 gracekim3l@grnaii.com CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www cityoffederalway. com Jim Ferrell, Mayor FILE March 10, 2020 Re: File #19-105869-00-SU; TECHNICAL COMMENT LETTER Graceland Short Plat, 37325 8th Avenue South, Federal Way Dear Eunhee Kim: City of Federal Way staff has reviewed your December 17, 2019, submittal of documents related to the Graceland Short Plat application. City, departments have provided the following comments that will need to be addressed prior to preliminary approval of your application, or as otherwise noted, Questions regarding the technical review comments should be addressed to the referenced staff representative. COMMUNITY DEVELOPMENT — PLANNING DIVISION Becky Chapin, 253-835-2641, Becky,Chapin@cityoffedetalway,com 1. Content &Form ofApplieation —Please provide the following applicable items as identified in Bulletin #010 and content requirements of Federal V9 Revised Code JNMC) 18.30.030 on the short plat document: • Add the city file number (19-105869-00-SLD in the space provided in the Title Block on all sheets. The scale on the top right of sheet 2 is incomplete, 1 inch - 60 feet. • Building setback lines should be revised as detailed in comment #3 below. • Include the following information for Buildable Lands Calculations in a tabular form on the face of the plat: o Gross Plat Area — Acreage of the site to be platted prior to any dedications or set -asides. o CriticalAreas — Acreage precluded from development due to wetlands and buffers. o Rig64r-of-Ey — Acreage dedicated for public rights -of -way (both newly created streets and expansions of existing streets); private access tracts or easements; and alleys. o Public Purpose — Acreage of site to be used For retention/detention/drainage facilities; open space and parks; or other on -site public facilities. Do not include public utility easements or landscaping. o Net Plat Area— Gross plat area minus critical areas, right-of-way, and public purpose. Environmental# CriticalAreas— A wetland and stream reconnaissance, prepared by a qualified wetland biologist, is required. I am aware that a previous PIanning Intern provided you with a critical Ietter on September 19, 2018, that stated "to the best of our knowledge that there is no evidence of any critical areas affecting the above -referenced parcel. In the event that critical areas are identified on the property, Please contact the City to determine applicable permitting requirements." After review of the city's critical areas maps, it has been determined that wetlands and a Type F Fish Bearing stream are nearby to the west of the site. The wetlands to the west are very highly rated, and likely have a 225-foot buffer. Preliminarily, the wetland and stream reconnaissance must be provided and identify to the extent possible, the location and proximity to the off -site wetlands, wetland buffers and stream, and associated buffer. Eunhee Kim Page 2of4 March 10, 2020 Potentially, all or a portion of the subject site may qualify for a wetland buffer reduction pursuant to cia FWRC 19.145.440(4), "Permanently Altered Wetland azeaf and the bject short plat site.Thewetland e and asso red residential improvements located between the biologist must address the FWRC provisions for a permanently altered buffer, in conjunction with providing the wetland and stream reconnaissance. The applicant will be required to pay for ti �l area report required city reviews arereview senooutA toourconsureports ltarit forand information on a cost recovery basis. The scope of work, and the city consultant's reviewrestimate ti n mayst be pre -funded be required following the inty the �tial review' to city review. Additional wetland and/or stream. in y d setbacks mily 3. Required Yard Sethackr —pursuant to FWRC 19'200.010, yards. Corner lot side yard for that potion of the odwelling no g unit are 20 Feet front yard and 5 feet side and rear y vehicular access adjacent to the primary vehicular side is not adjacent to the se indicate should be 10 feewhere the t Revise the setbacks will be located on lot _ an y accordingly for all remaining lots on the short plat drawing to depict a five-foot side and rear yard setback, ites 4. Tree Retention —Pursuant to FWRC 19 nurriberOoF tree units equiredQo i�ened sprov derequired ciiiated by at least 25 tree -units per acre. The total multiplying the gross site acreage, minus any proposed public or private streets. In the case of the 2.5-acre site, ¢3 tree units are required. This can et via preserving onsitc trees (preferably) trees bas d on their sized and species, new trees. A tree unit is a credit assigned to existi ngand replacement respectively. Please provide the tree unit calculation for the site and how the tree unit standards will be met. The tree/vegetation retention plan should contain items (a) through (e) listed in FWRC 19.120.040(2). rovided. All 5. Open Space —Please provide a statement n�Plexplaining �°e moun of 15 percent en space shall of the gross land areaofthe subdivisions are required to provide pspace subdivision site per FWRC 18.55,060(2). ment may be It does not appear that the remaining open � spathecdiswill euon of the parksbe provided on sit�Ao� The � Pm lieu of open space made to satisfy open space requirem shall be calculated on 15 percent (minus any landscape buffet credit of the most recent assessed value o the property and paid prior to recording the short subdivision. A written request to Parks Director John Hutton must be submitted if the open space shall be paid as a Eee-in-lieu, pursuant to FWRC 18.55.060(2). 6. SchaalAccess.flnalyrrr -- Pursuant to FWRC 18.55.070, pedestrian nd bicycle cycleaccess general should be provided For established or planned safe school routes, bikeways, provide an analysis of access routes for schools serving this proposed short plait. Contact Jennifer Wojciechowski with Federal Way Public Schools at 253-945-2071, or jwo}cier` Fwps-org, for information about the school access analysis requirements and assignment information. PUBLIC WORKS — DEVELOPMENT SERVICES Ann Dower, 253-835-2732, ann.dower@cityoffederalway-com Plans 1. Right-of-way improvements are required. ob e� a went x odification, a request must be submittfication was granted in 2018, ed and a new ut it has expired. If the developer wishes Doc. I.D. 80149 19-105869-00-SU x �-S } r� Eunhee Kim Page 3 of 4 March 10, 2020 decision issued. Frontage improvements and associated drainage must be designed by a civil engineer licensed in the state of Washington. Engineering plans are required unless all frontage improvements are waived through the modification process. 2. The street sections must be shown on the plans. 3. Show the city file number, 19-105869-00-SU, on the plans in the upper left corner. 4. The plans must be updated with a current stamp and signature for the surveyor. 5. Show the location of all structures with a distance from the existing and proposed property lines if within 50 feet. Technical Information Report 6. The Technical Information Report must be completed and stamped by a civil engineer licensed in the state of Washington. A structural engineer stamp and signature is not acceptable. 7. The TIR makes several inaccurate statements and assumptions. Please note the following and revise the text and the worksheet. • Unless frontage improvements are completely waived, engineering plans will be required for the mad and associated storm drainage. Plans must also be provided for onsite flow control and conveyance. ■ Erosion and sediment control is required for every project that constructs frontage improvements or disturbs land. • Each lot must be expected to create at least 4,000 square feet of impervious area and an appropriately -sized Best Management Practice (BNIP) must be located on each lot, or a detention facility provided. BIVIP's must be reviewed and approved by King County Health so that they do not conflict with the proposed septic design. • A conveyance system for the homes may not be simply connected to the public right-of-way without first providing a properly designed BMP or flow control system. • The city does not maintain detention facilities for private property. • Water duality treatment may be required, depending upon the amount of new pollution -generating impervious surface created by the required frontage improvements. ■ BMP's for the site must be fully vetted and implemented to the extent feasible. The short plat is not exempt from this requirement. • Enhanced basic water quality is required for this parcel. PUBLIC WORKS — TRAFFIC DIVISION 5arady Long, 253-835-2743, sarady.long [@Cityoffederalway.com 1. Frontage improvements along the property frontage on South 373"' Street and 81h Avenue South are required. The required improvements must be depicted on the plans, including the street sections. South 19-105869-00-SU Doc. LD. 80149 Eunhee Kim Page 4 of 4 March 10, 2020 , 10-foot ditch, 6- 373-d Street and 96 Avenue South shall be Type ' Assuming consisting mme�cal cra s section, half street foot sidewalk, and street lights in 70-foot right -Of -way improvements are required as measured from the street centerline. deemed ary 2. Tapers and transitions beyond the project froof directed nt-agemay be bythe public require rorksdirectors for safety purposes. The taper sate shall be W5 I 3. Driveways serving a single-family dwelling unit abutting two streets should be at least 25 feet from the beginning of the street radius. 4. Show the conceptual street lighting plan for the plat as part of the frontage improvements. LAKEHAVEN WATER & SEWER DISTRICT Brian Asbury, 253-946-5407, BAsbury@lakebaven.org The applicant has completed and submitted toLakehaven W1v1pLak haven's certificates are only valition for Certificates of Availability, foranone Lakehaven issued those certificates m early, January year, the conditions indicated therein have not changed. Thonnelicant ctions;will it appears the applicant need to complete s proposing the submit applications to Lakehaven for any necessary use of onsite septic systems. CLOSING copies of the short plat Please make the following corrections andresubmit .,, pur pursuant to F\VRC 18 05 080, Han applicant € � to provide e completed "Resubmittal In Form. additional information to the city with 180 �1e being shall have na duty to process, tioon is or issue application shall be deemed null and void and the city decisions with respect to such an application. If you have any questions regarding this letter, please contact me at becky.chapin@cityoffederalway.com, or 253-835-2641. Sincerely, r r Becky Cha p Senior Planner enc: Resubmittal Handout Ann Dower, Senior Engineering Plans Rcviewer Sarady Long, Senior Transportation Planning Engineer Brian Asbury, L.akehawn Water & Sewer District Doo I.D. 80149 19-105869-00-SU CITY OF O CITY HALL CPY Federal Way, , W Avenue South Federal Way Federal Way, WA 98003-6325 (253) 835-7000 Centered or Opportunity www.cityoffederalway..com January 24, 2020 Jim Ferrell, Mayor Eunhee Kim 37325 81h Avenue South Federal Way, WA 98003 ce' 31 .com Re: File #19-105869-00-SU; LETTER OF COMPLETE APPLICATION Graceland Short Plat, 37325 81h Avenue South, Federal Way Dear Eunhee Kim: The Community Development Department is in receipt of the December 17, 2019, application submittal for the short subdivision of one single-family residential lot into four single-family residential lots. Pursuant to Federal Ii!ay Revised Code (FlK q 18.30.050(a), within 28 days of receiving a short subdivision application, the department shall notify the applicant whether the application is complete, or whether additional information is necessary. NOTICE OF COMPLETE APPLICATION Please consider this correspondence a formal Letter of Complete Application. Pursuant to FWRC 18.30.050, the application is deemed complete as of January 14, 2020. The complete application determination is based on a review of your submittal documents relative to those requirements as set forth in FWRC 18.30.030. The submittal requirements are not intended to determine if an application conforms to the City of Federal Way codes; they are used only to determine if all required materials have been submitted. NOTICE OF APPLICATION A Notice of Application (NOA) will be posted on the city's official notice boards and published in the Federal lllaey Nlirmrwithin 14 days of this letter, pursuant to FWRC 18.30.080(2). The city will prepare two Public Notice Boards that the applicant will be responsible for posting on site by Friday, January 31, 2020. Further posting instructions and the notice boards will be available for pick-up at Will Call at the second floor of City Hall on Monday, January 27, 2020. CLOSING Formal processing and review of your application will now begin. The Development Review Committee staff is Preparing initial technical review comments that will be forwarded to you in a separate correspondence at a later date. Technical review comments may result in a request for additional information and revisions in order to comply with applicable code requirements. If you have any questions regarding this project, please feel free to contact me at 253-835-2641 or becky.chapin@cityoffederalway.com. Sincerely, V Becky Chap Senior Planner enc: Notice of Application c: Ann Dower, Senior Engineering Plans Reviewer Sarady Long, Senior Transportation Planning Engineer Chris Cahan, South King Fire & Rescue - Brian Asbury, Lakehaven Water & Sewer District 19-105869-00-SU Graceland Short Plat Doc. I.D. 80070 Aa STATE OF WASHINGTON, COUNTY OF KING } �� AFFIDAVIT OF PUBLICATION PUBLIC NOTICE Rudi Alcott, being first duly sworn on oath that he is the Vice President of Advertising of the Federal Way Mirror a weekly newspaper, which newspaper is a legal newspaper of general circulation and is now and has been for more than six months prior to the date of publication hereinafter referred to, published in the English language continuously as a weekly newspaper in King County, Washington. The Federal Way Mirror has been approved as a Legal Newspaper by order of the Superior Court of the State of Washington for King County. The notice in the exact form annexed was published in regular issues of the Federal Way Mirror (and not in supplement form) which was regularly distributed to its subscribers during the below stated period. The annexed notice, (Ad#888875) a: Public Notice was published on January 31It, 2020. The full amount of the fee charged for said foregoing publication is the sum of $123.63. Rudi Alcott Vice President of Advertising, Federal Way Mirror GP.LE G,rrr Qi W : IVQ-FA Ry PURLI w 7 Subscribed and sworn to me this 31st day of January, 2020. cz��.�'a' Na ,eo •�� ti VAS,'���ti Gale Gwin, Notary Public for the State of Washington, Residing in Covington, Washington Classified Proof FkWml way NOTICE OF MASTER LAND USE APPLICATION Project Name: Graceland Short Plat Project Description: Proposed short subdivision of one single-family lot into four single-family lots. Subject property is zoned Single Family Residential (RS 35.0). Applicant: Eunhee Kim, 37325 8th Avenue South, Federal Way, WA WW3 Project Location: 37325 8th Avenue South. Tax Parcel 1322104-9023 Date of Application: December 17, 2019 Date Determined Complete: January 14, 2020 Date of Notice of Applicalion: JanuaR, 31, 2020 Requested Decision and Other Permits Included with this Application: The applicant requests a short subdivision decision (file #19-105869-00-SU) issued by the Director of Community Development pursuant to Fede►^al Way Revised Code (FWRC) Chapter 18.30. Additional permits and/or approvals in conjunction With the short subdivision declslon include concurrency (file #19-105870.O0-CN). Environmental Documents: Preliminary Technical Information Report (TIR) prepared by Eul Kim Pro- fessional Engineer (December 15, 2019). Development Regulations to Be Used for Project Mitigation: FWRC Title 16 "Surface Water Man• agement," Title 18 "Subdivisions," and Title 19 "Zoning and Development Code." Consistency with Applicable City Plans and Regulations: The project will be reviewed for consistency with all applicable codes and regulations. including the FWRC: 2016 King County Surface Water Design Manual as amended by the City of Federal Way; and Public Works Development 51andards. Public Comment & Appeals: The official project file is available for public review at the Community Development Department (address below), Any person may submit written comments on the short subdivision application to the Director of Commu- nity Development by February 17.2020. Only per- sons who submit written documents to the Direc- tor, or specifically request a copy of the original Classified Proof decision, may appeal the Director's decision. Availability of File and Environmental DDCU- menls: The official project file and referenced en- virohmenlal documents are available for public re- view during normal business hours at the Community Development Department, 33325 8th Avenue South, 2nd Floor, Federal Way, WA 9B003. Stall Contact., Senior Planner Becky Chapin. 253- 835-2641. becky.chaainOciiyoffekrAlway.com Printed in the Federal Way Mirror January 31. 2019. #888875 �VA-Z&Iej (,n AM AN M CITY OF Federal Way COMMUNITY DEVELOPMENT DEPARTMENT 33325 8th Avenue South Federal Way WA 98003-6325 253-835-7000; Fax 253-835-2609 planning@cityoffederalway.com www.city.offederolway.com DECLARATION OF DISTRIBUTION I, William Goldinq hereby declare, under penalty of perjury of the laws of the State of Washington, that a: XNotice 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 ❑ FWRC 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/orxposted to or at each of the attached addresses on January 30-1 2019. Project Name Graceland Short Plat File Number(s) 19-105869-00-SU Signature Date ` /30` a©&6 I:\Public Notice Posting\Declaration of Distribution with Posting Sites.doc 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 I:\Public Notice Posting\Declaration of Distribution with Posting Sites.doc CIT Federal Way DEPARTMENT OF COMMUNITY DEVELOPMENT 33325 8th Avenue South Federal Way WA 98003 253-835-7000; Fax 253-835-2609 www.cii-offed rralwa .com DECLARATION OF DISTRIBUTION I, E, Tina Piet^ hereby declare, under penalty of perjury of the laws of the State of Washington, that a: I] Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Optional DNS/MDNS ❑ FWRC Interpretation n ❑ 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 ❑x emailed ❑ mailed ❑ faxed and/or ❑ posted to or at each of the attached addresses on January 28 2020 Project Name Graceland Shflrt Plat File Number(s) 19-105869-00-SU Signature l Date uary 28 2020 , . Ak CITY OF Federal Way NOTICE OF MASTER LAND USE APPLICATION Project Name: Graceland Short Plat Project Description: Proposed short subdivision of one single-family lot into four single-family lots. Subject property is zoned Single Family Residential (RS 35.0). Applicant: Eunhee Kim, 37325 8th Avenue South, Federal Way, WA 98003 Project Location: 37325 8 h Avenue South. Tax Parcel #322104-9023 Date of Application: December i 7, 2019 Date Determined Complete: January 14, 2020 Date of Notice of Application: January 31, 2020 Requested Decision and Other Permits Included with this Application: The applicant requests a short subdivision decision (file # I9-105869-00-SU) issued by the Director of Community Development pursuant to Federal Way Revised Code (FWRC) Chapter 18.30. Additional permits and/or approvals in conjunction with the short subdivision decision include concurrency (file #19-105870-00-CN). Environmental Documents: Preliminary Technical Information Report (TIR) prepared by Eui Kim Professional Engineer (December 15, 2019). Development Regulations to Be Used for Project Mitigation: FWRC Title 16 "Surface Water Management," Title 18 "Subdivisions," and Title 19 "Zoning and Development Code." Consistency with Applicable City Plans and Regulations: The project will be reviewed for consistency with all applicable codes and regulations, including the FWRC; 2016 King County Surface Water Design Manual as amended by the City of Federal Way; and Public Works Development Standards. Public Comment & Appeals: The official project file is available for public review at the Community Development Department (address below). Any person may submit written comments on the short subdivision application to the Director of Community Development by February 17, 2020. Only persons who submit written documents to the Director, or specifically request a copy of the original decision, may appeal the Director's decision. Availability of File and Environmental Documents: The official project file and referenced environmental documents are available for public review during normal business hours at the Community Development Department, 33325 8th Avenue South, 2"d Floor, Federal Way, WA 98003. Staff Contact: Senior Planner Becky Chapin, 253-835-2641, IWAY.Com Printed in the Federal Way Mirror January 31, 2020. Doc ID 80071 19-105869-SU Tina Piety From: Gale Gwin <ggwin@kentreporter.com> Sent: Tuesday, January 28, 2020 10:25 AM To: Tina Piety Subject: Re: Legal Notice Hi Tina, I received your notice (Graceland Short Plat) to be published in the Federal Way Mirror Friday January 31, 2020, Thanks and have a great day, Gale On Tue, Jan 28, 2020 at 9:50 AM Tina Piety <Tina-Piety@cityoffederalwa .com> wrote: Hello, Please publish the attached legal notice (Graceland Short Plat NOA, 19-105869-SU) in the Federal Way Mirror's Friday (1/31/20) issue. Please furnish an affidavit of publication. This is for the Community Development account 83722477. Thank you, Tina E. Tina Piety, CAP, OM Administrative Assistant II ' e erai Way Community Development Department 33325 8th Avenue South Federal Way, WA 98003-6325 Phone:253/835-2601 Fax: 253/835-2609 www.cityoffedera Iway.com Gale Gwin Office Coordinator/Legal/Obituary Representative Direct: 253-872-6677 Internal: 25027 Fax: 253-437-6016 1010 S 336th St, Federal Way, WA 98003 [P] Map Print Rates Online Rates Media Kit Sound Info CITY OF Federal Way NOTICE OF MASTER LAND USE APPLICATION Project Name: Graceland Short Plat Project Description: Proposed short subdivision of one single-family lot into four single-family lots. Subject property is zoned Single Family Residential (RS 35.0). Applicant: Eunhee Kim, 37325 81 Avenue South, Federal Way, WA 98003 Project Location: 37325 8'h Avenue South Tax Parcel #322104-9023 Date of Application: December 17, 2019 Date Determined Complete: January 14, 2020 Date of Notice of Application: January 31, 2020 S 356TH ST F s 360TH ST a a t b f+ ST e S1 S 376TH ST VICINITY MAP N.TS Requested Decision and Other Permits Included with this Application: The applicant requests a short subdivision decision (file #19-105869-00-SU) issued by the Director of Community Development pursuant to Federal Way Revised Code (FWRC) Chapter 18.30. Additional permits and/or approvals in conjunction with the short subdivision decision include concurrency (file #19-105870-00-CN). Environmental Documents: Preliminary Technical Information Report (TIR) prepared by Eui Kim Professional Engineer (December 15, 2019). Development Regulations to Be Used for Project Mitigation: FWRC Title 16 "Surface Water Management," Title 18 "Subdivisions," and Title 19 "Zoning and Development Code." Consistency with Applicable City Plans and Regulations: The project will be reviewed for consistency with all applicable codes and regulations, including the FWRC; 2016 King County Surface Water Design Manual as amended by the City of Federal Way; and Public Works Development Standards. Public Comment & Appeals: The official project file is available for public review at the Community Development Department (address below). Any person may submit written comments on the short subdivision application to the Director of Community Development by February 17, 2020. Only persons who submit written documents to the Director, or specifically request a copy of the original decision, may appeal the Director's decision. Availability of File and Environmental Documents: The official project file and referenced environmental documents are available for public review during normal business hours at the Community Development Department, 33325 8'h Avenue South, 2°d Floor, Federal Way, WA 98003. Staff Contact: Senior Planner Becky Chapin, 253-835-2641, beck .cha in a),cit offedemiva .eom Printed in the Federal Way Mirror January 31, 2020. Doc ID 80071 19-105869-00-SU CITY OF FEDERAL WAY COMMUNITY DEVELOPMENT DEPARTMENT DEVELOPMENT REVIEW COMMITTEE TRANSMITTAL DATE: December 20, 2019 TO: Cole Elliott, Development Services Manager Greg Kirk, Plans Examiner Rick Perez, City Traffic Engineer Brian Asbury, Lakehaven Water & Sewer District Chris Cahan, South King Fire & Rescue Jennifer Wojciechowski, Federal Way School District FROM: Becky Chapin, Senior Planner FOR DRC MTG. ON: January 9, 2020 - Completeness Review FILE NUMBER(s): 19-105869-00-SU RELATED FILE NOS.: 18-101829-00-PC PROJECT NAME: Graceland Short Plat PROJECT ADDRESS: 37325 8th Avenue South ZONING DISTRICT: RS 35.0 PROJECT DESCRIPTION: Short subdivision of one parcel into four residential lots along with public improvements. LAND USE PERMITS: PROJECT CONTACT: MATERIALS SUBMITTED: Short Plat Eunhee Kim 37325 8th Ave S Federal Way, WA 98003 gracekim3l@gmail.com • Master Land Use Application • Short Plat Drawing • Site Photos • Public Health Septic Conditional Approval • Title Report • Water & Sewer Availability Certificate • Lot Closure Calcs • Preliminary TIR All documents can be found electronically on the City's FTP Site: ftp://ftp.cityoffederalway.com/Outbox/Graceland%2OShort%2021at/ Eastgate Environmental Health Services public Health 14350 SE Eastgate Way Bellevue, WA 98007-6458 Seattle & King County 206-477-8050 Fax 206-296-9792 lTY relay: 711 www.kingcounty.gov/health September 30, 2019 Eunhee S Kim, PE 37325 8th Ave S Federal Way, WA 98003 Re: PRELMINARY Subdivision Application Review Address: 37325 8' Ave S Activity: SU0991427 Parcel No: 322104-9023 Owner: Eunhee Kim Dear Eui: Public Health has received your PRELEVIINARY FOUR (4) Lot Subdivision Application for the above referenced property. It has been reviewed in accordance with the King County Board of Health Code Title 13. Based on this review, it has been approved with the following conditions (to be met by fmal), comments or concerns: Prior to submitting for FINAL the applicant shall submit a CONFOP3 1 MG site design for the proposed lot one (1) of the proposed four (4) lot subdivision. The proposed design must meet the minimum setbacks to the proposed boundary lines of lot one (1). This design must be reviewed, approved, and installed prior to submitting for FINAL. It is unclear that there is sufficient area for an on -site sewage system and a one hundred percent reserve area for the proposed lot (1). 2. For Final a minimum of 4 soil logs per lot shall be provided in a contiguous area that is in accordance with KCC 13.28.050 and Table 13.28-1. A scaled plot plan of the proposed Final Subdivision depicting the land area proposed for an initial on -site system and a contiguous one hundred percent (100%) system reserve area and soil log locations. The plot plan shall also identify the house envelope, any critical areas, any critical area buffers, utility easements, road easements, storm water/surface water retention facilities, wells, surface water bodies and other features relevant to the sighting of an on -site sewage system either on the proposed or adjacent parcels. 4. Fill and disturbed soils were observed to a depth of 35, 50, and 29 inches in test pits 1, 2, and 9 respectively. These areas shall be avoided for FINAL. •®t202M Eunhee S Kim September 30, 2019 Page 2 If you have any questions, please contact me at (206) 477-8137 between the hours of 8:00 AM and 5:00 PM or leave a message on my voice mail. Sincerely, V- Jaro7neB4aker, R.S. HeEnvironmental Investigator III Community Environmental Health cc: City of Federal Way 201 S032A 000agg.00'1 ti t AFTER RECORDING MAIL TO: A Ycon and Eunhee Kim 37325 8th Avenue S Federal Way, WA 98003 /"J rL CtJ 321 0008" �/ PRGS-M00TI OF109% ^T 73.BSMFC v Ef Y E® 03/74/2016 14:3B Krw COUNTY NA .�1 DEC 17 2019 E2786329 CITY OF FEDERq� WAY KINGCOUNTY, ua COMMUN TY DJ EVn My TA1t 6,613.23 ENT SALE ost'12'30.00 PAGE-001 OF 001 Filed for Record at Request of: WFG National 'Title Company Escrow Number: 653015 Statutory Warranty Deed Grantor(s). Brad F. Wollen and l.inda Wollen, husband and wife, nowand at all times on imd since November 10, 1988, date of acquiring title Grantee(s): Ji Yeon Kim, a married woman as her separate estate and Eunbee Kim, a rnanied woman as her separate estate Abbreviated Legal: PTN NW 114 SEC 32, `I`WN 21 N, RAGE 4E WFG NA-rjL TJTf_E Additional legal(s) on page: order no. 0. 15 Assessor's Tax Parcel Numb s): 322104.9023 THE GRANTOR Brad F. Wollen and Linda Wollen, husband and wife, now and at all times on and since November 10, 1988, date of acquiring title for and in consideration of TEN DOLLARS AND OTHER GOOD AND VALUABLE CONSIDERATION in hand paid, conveys and warrants to Ji Yeon Kim, a married woman as her separate estate and lEurtftee Kim, a married woman as .her separate estate the following described real estate, situated in die County of King , State of Washington: "['HE EAST 518 FEET OF THE SOUTH HALF OF THE NORTH HALF OF THE SOUTHEAST QUARTER OF THE NORTHWEST QUARTER OF SECTION 32, TOWNSHIP 21 NORTH, .RA.NC.,E 4 EAST, W.M., KING COUNTY, WASHINGTON, EXCEPT THE NORTH 30 FEET THEREOF HERETOFORE CONVEYED TO KING COUNTY FOR RIGHT OF WAY OF STATE ROAD NO. I BY DEED RECORDED UNDER RECORDING NO. 2561343, KING COUNTY, WASHINGTON; SITUATE IN THE CITY OF FEDERAL WAY, COUNTY OF KING, STATE OF WASHINGTON. GRANTOR ACKNOWLEDGES THAT TrrLE Td THE PROPERTY 15 MARKETABLE AT TFIE TIME OF Tit1S CONVEYANCE. THE FOLLOWING. SHALLNOTCAUSETHETTTLETO BE UNMARKETABLE: RIGHTS, RESERVATIONS, COVENANTS, CONDITIONS, AND RESTRic-noNs, PRESENTLY OF RECORD AND GENERAL TO THE AREA; EASEMENTS AND ENCROACHMENTS, NOT MATERIALLY AFFECTING THE VALUE OF OR UNDULY INTERFERING WITH GRANTEE'S REASONABLE USE OFTHE PROPERTY; AND RESERVED OIL AND/OR MINING RIGHTS. Docurrtent .bait: 3/ 1 I /2016 By - Brad F. Wollen STATE OF VASHiNGTON County of 1&�f SS: By Lin Wollen I certify that I. know or have satisfactory evidence that Brad Wollen and Linda Wollen are the person(s) who appeared before me, and said person(s) acknowledged that they signed this instrument and acknowledged it to be their free and voluntary act for the uses and purposes mentioned in the instrument. Hated this t / day of March, 2016 l Notary Public in and for the Stta`te� of WASHINGTON Residing at: i_ &-k e.t,+. aor4 My appointment expirss: `Q - I CWF(G National Title Insurance Compa 0 wtlliamn Finunct0) Getup rampmsy Eunhee Kim 37325 8th Ave S Federal Way, WA 98003 Reference: Eunhee Kim Order No.: 19-243810 Liability: Charge: Tax: Total: SUBDIVISION GUARANTEE Subject to the Exclusions from Coverage, the limits of liability and other provisions of the Conditions and Stipulations hereto annexed and made a part of this Guarantee, and subject to the further exclusion and limitation that no guarantee is given nor liability assumed with respect to the identity of any party named or referred to in Schedule A or with respect to the validity, legal effect or priority of any matter shown therein. WFG National Title Insurance Company a corporation herein called the Company, GUARANTEES the Assured named in Schedule A against actual monetary loss or damage not exceeding the liability amount stated herein which the Assured shall sustain by reason of any incorrectness in the assurances set forth in Schedule A. Dated: December 26, 2018 Issued By: WFG National Title Company of Washington, LLC, as Issuing Agent for WFG National Title Insurance Company By: Authorized Signature Form No. 3153353 WFG NATIONAL TITLE INSURANCE COMPANY oxrnh* a � President r. ATTEST Secretary Subdivision Guarantee SUBDIVISION GUARANTEE SCHEDULE A Guarantee No.: 3153353-3389218 Liability: $1,000.00 Date of Guarantee: December 26, 2018 Fee: $250.00 Name of Assured: Eunhee Kim Date of Guarantee: December 26, 2018 The assurances referred to on the face page hereof are: a. That according to those public records which, under the recording laws, impart constructive notice of matters affecting title to the following described land: See Exhibit "A" attached hereto and made a part hereof b. Title to the estate or interest in the land is vested in: Eunhee Kim, a married woman as her separate estate and Ji Y. Kim, a married woman, as her separate estate C. The estate or interest in the land which is covered by the Guarantee is: Fee Simple Subject to the Exceptions shown below, which are not necessarily shown in order of their priority. EXCEPTIONS 1. (A) UNPATENTED MINING CLAIMS; (B) RESERVATIONS OR EXCEPTIONS IN PATENTS OR IN ACTS AUTHORIZING THE ISSUANCE THEREOF; (C) INDIAN TREATY OR ABORIGINAL RIGHTS, INCLUDING, BUT NOT LIMITED TO, EASEMENTS OR EQUITABLE SERVITUDES; OR, (D) WATER RIGHTS, CLAIMS OR TITLE TO WATER, WHETHER OR NOT THE MATTERS EXCEPTED UNDER (A), (B), (C) OR (D) ARE SHOWN BY THE PUBLIC RECORDS. 2. Taxes and charges, together with interest, penalty and statutory foreclosure costs, if any, after delinquency: Tax Year: 2018 Tax Type: County Tax ID No.: 3221049023 Taxing Entity: King County Treasurer Total Annual Tax: $5,847.70 First Installment: $2,923.85 First Installment Status: Paid First Installment Due/Paid Date: April 30, 2018 First Installment Delinquent Date: May 1, 2018 Second Installment: $2,923.85 Second Installment Status: Paid Second Installment Due/Paid Date: October 31, 2018 Second Installment Delinquent Date: November 1, 2018 Notes: View Taxes 3. Quit Claim Deed: Grantor: Ji Yeon Kim Form No. 3153353 Subdivision Guarantee Grantee: Eunhee Kim Recorded: November 26, 2018 Recording No.: 20181126001304 Note: Said deed lacks marital status of all parties. 4. Matters of Record against the vested party Eunhee Kim, or persons with similar names. Numerous matters of record are found against persons with similar names. The effects of these matters, if any, on the subject property cannot be determined without further information. 5. Covenant to bear equal shares in the cost of the upkeep of a water system located on adjacent parcel, as disclosed by instrument recorded under recording no. 2961306. 6. Agreement for the right to the exclusive use of all water flowing from that certain well, called the felts well, with the right to free ingress and egress from and to the said well, for the purposes of repairing and maintaining said the same in its present location as set forth in instrument recorded under Recording no. 3495245. 7. Matters set forth by survey recorded on November 29, 1984, in 841129g01 7..of Official Records. 8. Notice of On -Site Sewage System Operation and Maintenance Requirements and the terms and provisions thereof, recorded as 20160324000887 of Official Records. Form No. 3153353 Subdivision Guarantee EXHIBIT "A" LEGAL DESCRIPTION THE EAST 518 FEET OF THE SOUTH HALF OF THE NORTH HALF OF THE SOUTHEAST QUARTER OF THE NORTHWEST QUARTER OF SECTION 32, TOWNSHIP 21 NORTH, RANGE 4 EAST, W.M., KING COUNTY, WASHINGTON; EXCEPT THE NORTH 30 FEET THEREOF HERETOFORE CONVEYED TO KING COUNTY FOR RIGHT OF WAY OF STATE ROAD NO. 1 BY DEED RECORDED UNDER RECORDING NO. 2561343, KING COUNTY, WASHINGTON; Tax Account No(s): 3221049023 Form No. 3153353 Subdivision Guarantee SCHEDULE OF EXCLUSIONS FROM COVERAGE OF THIS GUARANTEE 1. Except to the extent that specific assurances are provided in Schedule A of this Guarantee, the Company assumes no liability for loss or damage by reason of the following: (a) Defects, liens, encumbrances, adverse claims or other matters against the title, whether or not shown by the public records. (b) (1) Taxes or assessments of any taxing authority that levies taxes or assessments on real property; or, (2) Proceedings by a public agency which may result in taxes or assessments, or notices of such proceedings, whether or not the matters excluded under (1) or (2) are shown by the records of the taxing authority or by the public records. (c) (1) Unpatented mining claims; (2) reservations or exceptions in patents or in Acts authorizing the issuance thereof; (3) water rights, claims or title to water, whether or not the matters excluded under (1), (2) or (3) are shown by the public records. 2. Notwithstanding any specific assurances which are provided in Schedule A of this Guarantee, the Company assumes no liability for loss or damage by reason of the following: (a) Defects, liens, encumbrances, adverse claims or other matters affecting the title to any property beyond the lines of the land expressly described in the description set forth in Schedule (A), (C) or in Part 2 of this Guarantee, or title to streets, roads, avenues, lanes, ways or waterways to which such land abuts, or the right to maintain therein vaults, tunnels, ramps or any structure or improvements; or any rights or easements therein, unless such property, rights or easements are expressly and specifically set forth in said description. (b) Defects, liens, encumbrances, adverse claims or other matters, whether or not shown by the public records; (1) which are created, suffered, assumed or agreed to by one or more of the Assureds; (2) which result in no loss to the Assured; or (3) which do not result in the invalidity or potential invalidity of any judicial or non -judicial proceeding which is within the scope and purpose of the assurances provided. (c) The identity of any party shown or referred to in Schedule A. (d) The validity, legal effect or priority of any matter shown or referred to in this Guarantee. GUARANTEE CONDITIONS AND STIPULATIONS Definition of Terms. The following terms when used in the Guarantee mean: (a) the "Assured": the party or parties named as the Assured in this Guarantee, or on a supplemental writing executed by the Company. (b) 'land": the land described or referred to in Schedule (A)(C) or in Part 2, and improvements affixed thereto which by law constitute real property. The term 'land" does not include any property beyond the lines of the area described or referred to in Schedule (A)(C) or in Part 2, nor any right, title, interest, estate or easement in abutting streets, roads, avenues, alleys, lanes, ways or waterways. (c) "mortgage": mortgage, deed of trust, trust deed, or other security instrument. (d) "public records": records established under state statutes at Date of Guarantee for the purpose of imparting constructive notice of matters relating to real property to purchasers for value and without knowledge. (e) "date": the effective date. Form No. 3153353 Subdivision Guarantee 2. Notice of Claim to be Given by Assured Claimant. An Assured shall notify the Company promptly in writing in case knowledge shall come to an Assured hereunder of any claim of title or interest which is adverse to the title to the estate or interest, as stated herein, and which might cause loss or damage for which the Company may be liable by virtue of this Guarantee. If prompt notice shall not be given to the Company, then all liability of the Company shall terminate with regard to the matter or matters for which prompt notice is required; provided, however, that failure to notify the Company shall in no case prejudice the rights of any Assured under this Guarantee unless the Company shall be prejudiced by the failure and then only to the extent of the prejudice. 3. No Duty to Defend or Prosecute. The Company shall have no duty to defend or prosecute any action or proceeding to which the Assured is a party, notwithstanding the nature of any allegation in such action or proceeding. 4. Company's Option to Defend or Prosecute Actions; Duty of Assured Claimant to Cooperate. Even though the Company has no duty to defend or prosecute as set forth in Paragraph 3 above: (a) The Company shall have the right, at its sole option and cost, to institute and prosecute any action or proceeding, interpose a defense, as limited in (b), or to do any other act which in its opinion may be necessary or desirable to establish the title to the estate or interest as stated herein, or to establish the lien rights of the Assured, or to prevent or reduce loss or damage to the Assured. The Company may take any appropriate action under the terms of this Guarantee, whether or not it shall be liable hereunder, and shall not thereby concede liability or waive any provision of this Guarantee. If the Company shall exercise its rights under this paragraph, it shall do so diligently. (b) If the Company elects to exercise its options as stated in Paragraph 4(a) the Company shall have the right to select counsel of its choice (subject to the right of such Assured to object for reasonable cause) to represent the Assured and shall not be liable for and will not pay the fees of any other counsel, nor will the Company pay any fees, costs or expenses incurred by an Assured in the defense of those causes of action which allege matters not covered by this Guarantee. (c) Whenever the Company shall have brought an action or interposed a defense as permitted by the provisions of this Guarantee, the Company may pursue any litigation to final determination by a court of competent jurisdiction and expressly reserves the right, in its sole discretion, to appeal from an adverse judgment or order. (d) In all cases where this Guarantee permits the Company to prosecute or provide for the defense of any action or proceeding, an Assured shall secure to the Company the right to so prosecute or provide for the defense of any action or proceeding, and all appeals therein, and permit the Company to use, at its option, the name of such Assured for this purpose. Whenever requested by the Company, an Assured, at the Company's expense, shall give the Company all reasonable aid in any action or proceeding, securing evidence, obtaining witnesses, prosecuting or defending the action or lawful act which in the opinion of the Company may be necessary or desirable to establish the title to the estate or interest as stated herein, or to establish the lien rights of the Assured. If the Company is prejudiced by the failure of the Assured to furnish the required cooperation, the Company's obligations to the Assured under the Guarantee shall terminate. Form No. 3153353 Subdivision Guarantee 5. Proof of Loss or Damage. In addition to and after the notices required under Section 2 of these Conditions and Stipulations have been provided to the Company, a proof of loss or damage signed and sworn to by the Assured shall be furnished to the Company within ninety (90) days after the Assured shall ascertain the facts giving rise to the loss or damage. The proof of loss or damage shall describe the matters covered by this Guarantee which constitute the basis of loss or damage and shall state, to the extent possible, the basis of calculating the amount of the loss or damage. If the Company is prejudiced by the failure of the Assured to provide the required proof of loss or damage, the Company's obligation to such assured under the Guarantee shall terminate. In addition, the Assured may reasonably be required to submit to examination under oath by any authorized representative of the Company and shall produce for examination, inspection and copying, at such reasonable times and places as may be designated by any authorized representative of the Company, all records, books, ledgers, checks, correspondence and memoranda, whether bearing a date before or after Date of Guarantee, which reasonably pertain to the loss or damage. Further, if requested by any authorized representative of the Company, the Assured shall grant its permission, in writing, for any authorized representative of the Company to examine, inspect and copy all records, books, ledgers, checks, correspondence and memoranda in the custody or control of a third party, which reasonably pertain to the loss or damage. All information designated as confidential by the Assured provided to the Company pursuant to this Section shall not be disclosed to others unless, in the reasonable judgment of the Company, it is necessary in the administration of the claim. Failure of the Assured to submit for examination under oath, produce other reasonably requested information or grant permission to secure reasonably necessary information from third parties as required in the above paragraph, unless prohibited by law or governmental regulation, shall terminate any liability of the Company under this Guarantee to the Assured for that claim. 6. Options to Pay or Otherwise Settle Claims: Termination of Liability. In case of a claim under this Guarantee, the Company shall have the following additional options: (a) To Pay or Tender Payment of the Amount of Liability or to Purchase the Indebtedness. The Company shall have the option to pay or settle or compromise for or in the name of the Assured any claim which could result in loss to the Assured within the coverage of this Guarantee, or to pay the full amount of this Guarantee or, if this Guarantee is issued for the benefit of a holder of a mortgage or a lienholder, the Company shall have the option to purchase the indebtedness secured by said mortgage or said lien for the amount owing thereon, together with any costs, reasonable attorneys' fees and expenses incurred by the Assured claimant which were authorized by the Company up to the time of purchase. Such purchase, payment or tender of payment of the full amount of the Guarantee shall terminate all liability of the Company hereunder. In the event after notice of claim has been given to the Company by the Assured the Company offers to purchase said indebtedness, the owner of such indebtedness shall transfer and assign said indebtedness, together with any collateral security, to the Company upon payment of the purchase price. Upon the exercise by the Company of the option provided for in Paragraph (a) the Company's obligation to the Assured under this Guarantee for the claimed loss or damage, other than to make the payment required in that paragraph, shall terminate, including any obligation to continue the defense or prosecution of any litigation for which the Company has exercised its options under Paragraph 4, and the Guarantee shall be surrendered to the Company for cancellation. (b) To Pay or Otherwise Settle With Parties Other Than the Assured or With the Assured Claimant. To pay or otherwise settle with other parties for or in the name of an Assured claimant any claim assured against under this Guarantee, together with any costs, attorneys' fees and expenses incurred by the Assured claimant which were authorized by the Company up to the time of payment and which the Company is obligated to pay. Form No. 3153353 Subdivision Guarantee Upon the exercise by the Company of the option provided for in Paragraph (b) the Company's obligation to the Assured under this Guarantee for the claimed loss or damage, other than to make the payment required in that paragraph, shall terminate, including any obligation to continue the defense or prosecution of any litigation for which the Company has exercised its options under Paragraph 4. 7. Determination and Extent of Liability. This Guarantee is a contract of Indemnity against actual monetary loss or damage sustained or incurred by the Assured claimant who has suffered loss or damage by reason of reliance upon the assurances set forth in this Guarantee and only to the extent herein described, and subject to the Exclusions From Coverage of This Guarantee. The liability of the Company under this Guarantee to the Assured shall not exceed the least of: (a) the amount of liability stated in Schedule A or in Part 2; (b) the amount of the unpaid principal indebtedness secured by the mortgage of an Assured mortgagee, as limited or provided under Section 6 of these Conditions and Stipulations or as reduced under Section 9 of these Conditions and Stipulations, at the time the loss or damage assured against by this Guarantee occurs, together with interest thereon; or (c) the difference between the value of the estate or interest covered hereby as stated herein and the value of the estate or interest subject to any defect, lien or encumbrance assured against by this Guarantee. 8. Limitation of Liability. (a) If the Company establishes the title, or removes the alleged defect, lien or encumbrance, or cures any other matter assured against by this Guarantee in a reasonably diligent manner by any method, including litigation and the completion of any appeals therefrom, it shall have fully performed its obligations with respect to that matter and shall not be liable for any loss or damage caused thereby. (b) In the event of any litigation by the Company or with the Company's consent, the Company shall have no liability for loss or damage until there has been a final determination by a court of competent jurisdiction, and disposition of all appeals therefrom, adverse to the title, as stated herein. (c) The Company shall not be liable for loss or damage to any Assured for liability voluntarily assumed by the Assured in settling any claim or suit without the prior written consent of the Company. 9. Reduction of Liability or Termination of Liability. All payments under this Guarantee, except payments made for costs, attorneys' fees and expenses pursuant to Paragraph 4 shall reduce the amount of liability pro tanto. 10. Payment of Loss. (a) No payment shall be made without producing this Guarantee for endorsement of the payment unless the Guarantee has been lost or destroyed, in which case proof of loss or destruction shall be furnished to the satisfaction of the Company. (b) When liability and the extent of loss or damage has been definitely fixed in accordance with these Conditions and Stipulations, the loss or damage shall be payable within thirty (30) days thereafter. 11. Subrogation Upon Payment or Settlement. Whenever the Company shall have settled and paid a claim under this Guarantee, all right of subrogation shall vest in the Company unaffected by any act of the Assured claimant. The Company shall be subrogated to and be entitled to all rights and remedies which the Assured would have had against any person or property in respect to the claim had this Guarantee not been issued. If requested by the Company, the Assured shall transfer to the Company all rights and remedies against any person or property necessary in order to perfect this right of subrogation. The Assured shall permit the Company to sue, compromise or settle in the name of the Assured and to use the name of the Assured in any transaction or litigation involving these rights or remedies. Form No. 3153353 Subdivision Guarantee If a payment on account of a claim does not fully cover the loss of the Assured the Company shall be subrogated to all rights and remedies of the Assured after the Assured shall have recovered its principal, interest, and costs of collection. Form No. 3153353 Subdivision Guarantee 12. Arbitration. Unless prohibited by applicable law, either the Company or the Assured may demand arbitration pursuant to the Title Insurance Arbitration Rules of the American Land Title Association. Arbitrable matters may include, but are not limited to, any controversy or claim between the Company and the Assured arising out of or relating to this Guarantee, any service of the Company in connection with its issuance or the breach of a Guarantee provision or other obligation. All arbitrable matters when the Amount of Liability is $2,000,000 or less shall be arbitrated at the option of either the Company or, the Assured. All arbitrable matters when the amount of liability is in excess of $2,000,000 shall be arbitrated only when agreed to by both the Company and the Assured. The Rules in effect at Date of Guarantee shall be binding upon the parties. The award may include attorneys' fees only if the laws of the state in which the land is located permits a court to award attorneys' fees to a prevailing party. Judgment upon the award rendered by the Arbitrator(s) may be entered in any court having jurisdiction thereof. The law of the situs of the land shall apply to an arbitration under the Title Insurance Arbitration Rules. A copy of the Rules may be obtained from the Company upon request. 13. Liability Limited to This Guarantee; Guarantee Entire Contract. (a) This Guarantee together with all endorsements, if any, attached hereto by the Company is the entire Guarantee and contract between the Assured and the Company. In interpreting any provision of this Guarantee, this Guarantee shall be construed as a whole. (b) Any claim of loss or damage, whether or not based on negligence, or any action asserting such claim, shall be restricted to this Guarantee. (c) No amendment of or endorsement to this Guarantee can be made except by a writing endorsed hereon or attached hereto signed by either the President, a Vice President, the Secretary, an Assistant Secretary, or validating officer or authorized signatory of the Company. 14. Notices, Where Sent. Any notice of claim and any other notice or statement in writing required to be given to the Company under this policy must be given to the Company at 12909 SW 68th Pkwy., Suite 350, Portland, OR 97223. WFG National Title Insurance Company's telephone number is (800) 334-8885. Email address: clairriq@yyf nationaltiU, {x . Form No. 3153353 Subdivision Guarantee CFG National Title Insurance Company a Wflkiatan Finnueiai Csseup rompa,y ABOUT YOUR PRIVACY At WFG, we believe it is important to protect the privacy and confidences of our customers. This notice is intended to explain how we collect, use, and protect any information that we may collect. It will explain the choices you may make about the use of that information. What Information Do We Collect About You? We collect certain types of information about you. This may consist of: Your name, address, and telephone number. Your email address. e Your social security or government ID numbers. Your financial information. We collect this information from: The application or other forms you fill out with us. The correspondence you and others direct to us. Our transactions with you. • Others involved in your transaction, including the real estate agent or lender. In some cases, we collect information from third parties. For instance, we may receive real estate information from local assessor's offices. How Do We Use This Information? We use the information we collect to respond to your requests. WE DO NOT SHARE your information with other companies. How Can You "Opt Out?" We do not share your information so there is no need to opt out. The information We Collect About You On Our Website When you enter our website, we automatically collect and store certain information. This consists of: • YourlP Address (Internet Protocol Address) and domain name. The type of browser and operating system you use. • The time of your visit. Qk The pages of our site you visit. If you register with us or fill out an on online survey, we will collect additional personal information, such as your name, telephone number, email address and mailing address. Cookie Usage In order to provide you with customized service, we make use of "cookies." Cookies are essentially files that help us identify your computer and respond to it. You may disable cookies on your own computer, but you may not be able to download online documents unless cookies are enabled. WFG Privacy Policy T�l How We Use Information The information we collect concerning: • Your browser • The time and date of your visit • The web pages or services you accessed is used for administrative and technical purposes. For instance, we may use it to count the number of visitors to our site and determine the most popular pages. We may also use it to review types of technology you are using, determine which link brought you here, assess how our advertisements on other sites are working, and to help with maintenance. We use information contained in your emails only for the purpose of responding to those emails. If we ask you to fill out any forms or surveys, we will use the information we receive only for the specific purposes indicated in those forms or surveys. Your Right to See and Correct Information If you wish to see the information collected about you, please contact your settlement agent. Children's Policy We do not knowingly collect information from children under the age of 18. We delete any information that we discover has been provided by children. Security --Generally We make every effort to protect the integrity of your information. Any personal information you enter into online forms or surveys will be encrypted to ensure it remains private. We limit the right of access to your information to employees that need to use the information to respond to or process your request or transaction. We also take industry standard (IPSEC) measures to protect our sites from malicious intrusions or hacking. --Phishing and Pretexting As you know, consumers are increasingly targeted by unscrupulous persons attempting to acquire sensitive personal or financial information, by impersonating legitimate businesses. We will never send you an unsolicited email or other communication requesting your private information. If you receive a communication directing you to enter your personal information, please disregard the instruction and contact us immediately at Compliances20natl naltjtle.com.. Oregon Residents We may not disclose personal or privileged information about you unless we provide you with a disclosure authorization form that is executed by you or your representative and otherwise complies with certain statutory requirements. Any such authorization is not valid for more than 24 months and may be revoked by you at any time, subject to the rights of anyone who relied on the authorization prior to your notice of revocation. In addition, if your personal or privileged information was collected or received by us in connection with a title insurance transaction, we cannot disclose such information if the disclosure authorization form that you executed is more than one year old or if the requested disclosure is for a purpose other than a purpose expressly permitted by statute. You have the right at any time to request in writing access to recorded personal information about you that is reasonably described by you and reasonably available to us. Within 30 days of the date of our receipt of any such written request from you, we will inform you of the nature and substance of any such information, permit you to see and copy that information or obtain a copy by mail, disclose the identity, if recorded, of the persons to whom we have disclosed such information during the previous two years, and provide you with a summary of the procedures by which you may request that such information be corrected, amended or deleted. Form No. 3153353 Subdivision Guarantee Do Not Track Because there is not an industry -standard process or defined criteria to permit a user to opt out of tracking their internet access (Do Not Track or DNT), we do not currently respond to the various DNT signals. How to Contact Us If you have any questions about our privacy policy, please contact WFG: • By email: Compliance@wfgnationaltitle.com • By telephone: 800-385-1590 • By fax: 503-974-9596 a By mail: 12909 SW 6811, Pkwy, Suite 350, Portland, OR 97223 In person: 12909 SW 68t" Pkwy, Suite 350, Portland, OR 97223 WFG FAMILY WILLISTON FINANCIAL GROUP LLC WFG NATIONAL TITLE INSURANCE COMPANY WFG LENDER SERVICES, LLC WFGLS TITLE AGENCY OF UTAH, LLC WFG NATIONAL TITLE COMPANY OF WASHINGTON, LLC WFG NATIONAL TITLE COMPANY OF CALIFORNIA WFG NATIONAL TITLE COMPANY OF TEXAS, LLC D/B/A WFG NATIONAL TITLE COMPANY UNIVERSAL TITLE PARTNERS, LLC VALUTRUST SOLUTIONS, LLC WILLISTON ENTERPRISE SOLUTIONS & TECHNOLOGY, LLC WFG NATIONAL TITLE COMPANY OF CLARK COUNTY, WA, LLC D/B/A WFG NATIONAL TITLE INLAND PROFESSIONAL TITLE LLC D/B/A WFG NATIONAL TITLE COMPANY OF EASTERN WA WFG NATIONAL TITLE COMPANY OF COLORADO Williston Finannci<-J Group Form No. 3153353 Subdivision Guarantee r REcEiVED Q.-takehaven WATER K: SEWER DISTRICT DEC 17 2019 CITY Lakehaven Water & Sewer District -- Development IIEngineering( O7 FEDERAL W. 31623 - 1st Ave S * PO Box 424.9 Federal Way, WA 98063-4249 ��DEVELOPMEr1lT Email: DE@Lakehaven.org * Telephone: 253-945-1581 or 253-945-1580 This certificate is intended to provide the applicant, land use agencies &/or public health departments with information necessary to evaluate development proposals. Lakehaven Water & Sewer District, at its sole discretion, reserves the right to delay, or deny, water service based upon capacity &/or supply iimitations in Lakehaven's or Other Purveyor's system facilities, iroposed Land Use: ❑ Building Permit-SFR () ❑ Building Permit-MFR () ❑ Building Permit -Other ❑ Subdivision O ® Short Subdivision (4 lots) ❑ Binding Site Plan ❑ Boundary Line Adjustment ❑ Other- (specify/describe) Tax Parcel N'umber(s): 3221049023 Ex. Bldg. Area to Remain: UNKNOWN sf 1�}1r4TEf�5Y'aT� N p Site Address: 37325 - 8th Ave S Lakehaven GIS Grid: I-15 New Bldg. Area Proposed: UNKNOWN sf 1• ® Water service can be provided by service connection to an existing K diameter water main that Is located in S 373rd St approximately 5S+/- Feet from the site. 2. ❑ Water service for the site will require an Improvement to Lakeliaven's water distribution system af: ❑ a• feet of " diameter water main to reach the site; and/or ❑ b. The construction ❑f a water distribution system on the site; and/or ❑ c. A major portion of Lakehaven's comprehens€ve water system plan would need to be implemented and/or constructer; and/or ❑ d. Other (describe): . 3. ® a. The existing water system Is in conformance with Lakehaven's Comprehensive Water system Plan, ❑ b. The existing water system is not in conformance with Lakehaven's Comprehensive Water system Plan and an Amendment to this Plan will be required. This may cause a delay In issuance of rand use approvals or permits. 4. a. The subject property is within the corporate limits of Lakehaven Water & Sewer District, or has been granted Boundary Review Board approval for extension of water service outside of LakehaIst I water service area. ❑ b. Annexation or Boundary Review Board approval will he necessary to provide service. S. Water service 1s subject to: ® a. Payment of connection charges (to he determined by Lakehaven, for any new/modified service connection); ® b. Proof or reservation of easement(s) as required by Lakehaven; ® c. Other: ] fV�ter Service , r nnectln„ a_palfo on_ , , fpr anv n�w�lr tp�ified service man rnam[] c1 -(.•. Comments/special conditions: a( 2 h o e xistin service _ aysnd ca a ca rt Igcal hu€ gn LL �)�i€ndiatQ{. Pr i Far re it m r & r ad s� e rr_ �jtion} f r r t nn: The nearest fire hydrants are approximately 60-2,55_+j ) page). feet from the proposed new lots (as marked on map on the bark of this Fire Flow at no less than 20 psi available wit€iln the water distributEon system is a minimum D-QG GPM for two (2) hours or more. This flow figure depicts the theoretical performance of the water distribution system under high demand conditions. Fire flow rater greater than this may be accominodated through water distribution system Improvements, contact Lakehaven for additional information. 330 Pressure Zone Est. Meter Elevatlon(s)-GIS: l0S:13-0 (i-/_) Est. Pressure Range at Meter(s) (psi): 84-97 1 hereby certify that the above water system Information is true. This certification shall be valid for one (1) year from the date of signature. Name: BRIAN ASBURY -title: I]1PY LOPthE T ENG F FRING S P _ V D Signature: .� Date: 3�_ G CoA-Water-2019 3221049023.docx (Form Update 28/18) Page 1 of 2 R,-ECEIVE -1 Zdo f 35Pd API R 0 2 2019 (ST/SZ/ZT aaepdn u»oj) x:)Op•£ZO6tOTZZ£ GTOZ-JaleN}-VOA EASTGATE ENVIRONMENTAL HEALTH Lakehaven RECEIVED WATER & SEWERDaSTRtGT DEC 17 2019 -for-OF AVATI-AniLy, OF FEDERAL WAY vy Lakehaven Water & Sewer District -®eve Development Engineering ing�Sec or�iELDL'M��'7 31623 — 1st Ave S # PO Box 4249 # Federal Way, WA 98063-4249 Telephone: 253-945-1581 or 253-945-1580 * Email: DE@Lakehaven.org This certificate is intended to provide the applicant, land use agencies l/or public health departments with information necessary to evaluate development proposals. Lakehaven Water & Sewer District, at its sole discretion, reserves the right to delay, or deny, sewer service based upon capacity &Jcir supply limitations in Lakehaven's or Other Purveyor's systems facilities. Proposed Land Use: ❑ Building Pernit-SM () ❑ Building Permit-MFR () ❑ Building Permit -Other Subdivision O ® Short Subdivision (4) ❑ Binding Site Plan ❑ Boundary Line Adjustment ❑ Other (specify/describe) Tax Parcel Nurnber(s): 3221049073 Site Address: 37325 - 8th Ave 5 Lakehaven GIS Grid: I-1.5 Ex. Bldg. Area to Remain: UNKNOWN New Bldg. Area Proposed: UNKNDWN-sF SEWER SYSTEM IIVFo MATIQ 71. ❑ Sewer service can be provided by service connection to an existing " diameter sewer main that is approximately feet from the site and the sewer system has the capacity to serve the proposed land use. 2. ® Sewer service for the site will require an improvement to Lakehaven's sanitary sewer system of: a. over 1.1 U ) miles of TBD" diameter sewer main or trunk to reach the site; and/or ❑ b. The construction of a sanitary sewer collection system on the site; and/or M c. A major portion of Lakehaven's comprehensive wastewater system plan would need to be implemented and/or constructed; and/or ® d. other (describe): Lakghaven Qeu r ment reui a or La eh Ii . 3. 0 a. The existing sewer system Is In conformance with Lakehaven's Comprehensive Wastewater System Plan. 0 b. The existing sewer system is not in conformance with Lakehaven's Comprehensive Wastewater System Plan and an Amendment to this Plan will be required. This may cause a delay In issuance of land use approvals or permits. 4. ® a. The proposed site land use Is within the corporate limits of Lakehaven Water & Sewer District, or has been granted Boundary Review Board approval for extension of sewer service outside of Lakehaven's sewer service area. Ll b. Annexation or Boundary Review Board approval will be necessary to provide service. S. Sewer service is subject to: 0 a. Payment of connection charges (to be determined by Lakehaven); ❑ b. Proof or reservation of easement(s) as required by Lakehaven; c. Other: S e Lion A --ired. Priva-e rarinder Pump AcireernenLs reaulred, DE 2 a tyLae ve prior to service cnection actiyatig�U. comments/special conditions: I hereby certify that the above sewer system information is true. This certification shall be valid for one (1) year from the date of signature. Narne: BRIAN ASBilELY Title: DEVELOPMENT ENGINEERING SUPERVISO,R Signature: Date: r 3221049023 swr.docx (Form Update 12/28/18) Page 1 of 2 3221049073 swr.docx (Form Update 1.2/28/18) Page 2 of 2 CivilReport original.TXT Parcel Map Check Report Client: Prepared by:7ohn W. Goodman, PLS 54051 Client Preparer Client Company Goodman Land Surveying, Inc. Address: 696 N. Military RD., Winlock, WA 98596 Date: 9/30/2018 1:32:12 PM Parcel Name: ORIGINAL - Property 1 Description: Process segment order counterclockwise: False Enable mapcheck across chord: False "North:10,969.08'" "East:9,505.70 "' Segment# 1: Line "Course: S880 26' 45""E" Length: 518.00' "North: 10,955.03 "' "East: 10,023.51 "' Segment# 2: Line "Course: S10 23' 52""W" Length: 298.38' "North: 10,656.74 "' "East: 10,016.23 "' Segment# 3: Line "Course: N880 24' 51""W" Length: 518.00' "North: 10,671.08 "' "East: 9,498.43 "' Segment# 4: Line "Course: N10 23' 52""E" Length: 298.09' "North: 10,969.08 "' "East: 9,505.70 "' "Perimeter: 1,632.48'" "Area: 154,487.28Sq.Ft." Error Closure: 0.00 "Course: S110 39' 51""E" Error North : -0.004 East: 0.001 "Precision 1: 136323470,000.00" Page 1 RECEIVE® DEC 17 2019 C(TY OF FFDFFLi\L WAY WKAI N Y DEVELOPMEW w, GO ,S C)F WAS 'j�� J. 54051 ? p� AEG � S T ERE-, •'�l�c r� ��`�4L LANDS ra-1-f8 CivilReport Proposed.TXT Parcel Map Check Report Client: Prepared by:John W. Goodman, PLS 54051 Client Preparer Client Company Goodman Land Surveying, Inc. Address: 696 N. Military RD., Winlock, WA 98596 Date: 9/30/2018 1:36:19 PM Parcel Name: PROPOSED - Property 1 Description: Process segment order counterclockwise: False Enable mapcheck across chord: False "North:10,807.66 "' "East:9,984.90 "' Segment# 1: Line "Course: S1° 23' 52""W" Length: 149.99' "North: 10, 657.71 "' "East: 9, 981.24 "' Segment# 2: Line "Course: N880 24' 51""W" Length: 244.18' "North: 10,664.47 "' "East: 9,737.16' Segment# 3: Line "Course: N10 23' 52""E" Length: 149.86' "North: 10,814.28 "' "East: 9,740.81 "' Segment# 4: Line "Course: S880 26' 45""E" Length: 244.18' "North: 10, 807.66 "' "East: 9, 984.90 "' Perimeter: 788.21' Error Closure: 0.00 Error North : 0.005 "Area: 36,608.37Sq.Ft." "Course: N60 04' 42""E" East: 0.001 "Precision 1: 788,210,000.00" Page 1 CivilReport Proposed.TXT Parcel Name: PROPOSED - Property : 2 Description: Process segment order counterclockwise: False Enable mapcheck across chord: False "North:10,950.98'" "East:9,988.40'" Segment# 1: Line "Course: S10 23' 52""W" Length: 143.37' 'North: 10, 807. 66 '" "East: 9, 984. 90 "' Segment# 2: Line "Course: N880 26' 45""W" Length: 244.18' "North: 10,814.28 "' "East: 9,740.81 "' Segment# 3: Line "Course: N1° 23' 52""E" Length: 143.37' "North: 10,957.61 "' "East: 9,744.31 "' Segment# 4: Line "Course: S880 26' 45""E" Length: 244.18' 'North: 10,950.98 '" "East: 9,988.40 "' Perimeter: 775.10' Error Closure: 0.00 Error North : 0.000 "Area: 35,008.22Sq.Ft." "Course: N0° 00' 00""E" East: 0.000 "Precision 1: 775,100,000.00" Parcel Name: PROPOSED - Property : 3 Description: Process segment order counterclockwise: False Enable mapcheck across chord: False "North:10,664.47 "' "East:9,737.16 "' Page 2 CivilReport Proposed.TXT Segment# 1: Line "Course: N880 24' 51""W" Length: 119.41' 'North: 10, 667.77 '" "East: 9, 617.79 "' Segment# 2: Line "Course: N1° 23' 52""E" Length: 293.16' "North: 10, 960.85 "' "East: 9, 624.94 "' Segment# 3: Line "Course: S880 26' 45""E" Length: 119.41' "North: 10,957.61 "' "East: 9,744.31 "' Segment# 4: Line "Course: S10 23' 52""W" Length: 143.37' "North: 10,814.28 "' "East: 9,740.81 "' Segment# 5: Line "Course: S1° 23' 52""W" Length: 149.86' "North: 10,664.46 "' "East: 9,737.16 "' Perimeter: 825.21' Error Closure: 0.00 Error North : -0.004 "Area: 35,010.28Sq.Ft." "Course: S1° 26' 19""E" East: 0.000 "Precision 1: 825,210,000.00" Parcel Name: PROPOSED - Property : 4 Description: Process segment order counterclockwise: False Enable mapcheck across chord: False "North:10,667.77 "' "East:9,617.79 "' Segment# 1: Line "Course: N880 24' 51""W" Length: 119.41' Page 3 CivilReport Proposed.TXT "North: 10,671.08 "' "East: 9,498.43 "' Segment# 2: Line "Course: N1° 23' 52""E" Length: 293.09' "North: 10,964.08 "' "East: 9,505.58 "' Segment# 3: Line "Course: S880 26' 45""E" Length: 119.41' "North: 10,960.84 "' "East: 9,624.94 "' Segment# 4: Line "Course: S1° 23' 52""W" Length: 293.16' 'North: 10, 667. 77 '" "East: 9, 617. 79 "' Perimeter: 825.08' Error Closure: 0.00 Error North : -0.004 "Area: 35,002.41Sq.Ft." "Course: S1° 26' 19""E" East: 0.000 "Precision 1: 825,070,000.00" Parcel Name: PROPOSED - Road Dedication Description: Process segment order counterclockwise: False Enable mapcheck across chord: False "North:10,955.03 "' "East:10,023.51 "' Segment# 1: Line "Course: S1° 23' 52""W" Length: 298.38' "North: 10,656.74 "' "East: 10,016.23 "' Segment# 2: Line "Course: N88° 24' 51""W" Length: 35.00' "North: 10,657.71 "' "East: 9,981.24 "' Segment# 3: Line Page 4 CivilReport Proposed.TXT "Course: N1° 23' 52""E" Length: 149.99' "North: 10,807.66 "' "East: 9,984.90 "' Segment# 4: Line "Course: N1° 23' 52""E" Length: 143.37' "North: 10, 950.98 "' "East: 9, 988.40 "' Segment# 5: Line "Course: N880 26' 45""W" Length: 244.18' "North: 10,957.61 "' "East: 9,744.31 "' Segment# 6: Line "Course: N880 26' 45""W" Length: 119.41' "North: 10, 960.85 "' "East: 9, 624.94 "' Segment# 7: Line "Course: N880 26' 45""W" Length: 119.41' "North: 10,964.08 "' "East: 9,505.58 "' Segment# 8: Line "Course: N1° 23' 52""E" Length: 5.00' "North: 10, 969.08 "' "East: 9, 505.70 "' Segment# 9: Line "Course: S880 26' 45""E" Length: 488.00' "North: 10,955.85 "' "East: 9,993.52 "' Segment# 10: Line "Course: S880 26' 45""E" "North: 10,955.03'" "Perimeter: 1,632.75 "' Error Closure: 0.00 Error North : -0.001 Length: 30.00' "East: 10,023.51 "' "Area: 12,858.01Sq.Ft." "Course: S30 40' 02""E" East: 0.000 "Precision 1: 1,632,740,000.00" t Page 5 54051 f �,•. G15TERF S� NAL LAN��'� ID-1 - q$ l MASTER LAND USE APPLICATION a ' DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES CfTY OF ' '�:y` RECEIVED E® 33325 8"' Avenue South Federal Way, WA 98003-6325 Federal Way ww.c DEC 17 2019 253-835Fax 253 833-2d09 t y� �;.�•.citvotfc:dera hway.corrl CITY OF FEDERAL WAY COMMUNITY pEvELOPMENT APPLICATION NO(S) [ ' �w l� Date Project Name _ �1� C ra (e,G(,I d (k qrt -Ptq� Property Address/Location JV-k Ave, >[� 79003 Parcel Number(s) Project Description SI_0; V;S;oyt,, �T Sao- ,:U, -, _. L �C, PLEASE PRINT Type of Permit Required Annexation Binding Site Plan Boundary Line Adjustment Comp Plan/Rezone Land Surface Modification Lot Line Elimination Preapplication Conference Process I (Director's Approval) Process II (Site Plan Review) Process III (Project Approval) Process IV (Hearing Examiner's Decision) Process V (Quasi -Judicial Rezone) Process VI SEPA w/Project SEPA Only Shoreline: Variance/Conditional Use V Short Subdivision Subdivision Variance: Commercial/Residential Required Information S Zoning Designation l�'✓ S Comprehensive Plan Designation Value of Existing Improvements t2 iValue of Proposed Improvements International Building Code (IBC): Occupancy Type Construction Type Applicant ll_ Name: �—:w 2�+ 2 P� � �- Address-' 3 73-kC__ ` 14"Q- 9, CitylState: ec�QYoe jrv�tyC3 } Loh ?,9no3 'Zip: (j Phone: 8 j��.� `�'S 7 Fax: Email: yace/&, - 31 Signature: Agent (tf different than Applicant) Name: Address: City/State: Zip: Phone: Fax: Email: Signature: Owner j Name:�,GI'1!'1e�, Address: 3 3d�-S �+l City/Slate: �Y We' t,[� Zip: a©3 Phone: !� j 2- Fax: Email: Signature: (J L Bulletin #003 — January 1, 2011 Page 1 of 1 lc:\Hand outs\Master Land Use Application A 1% CITY OF �! Federal Way DATE: 1/29/2020 TO: Becky Chapin FROM: Ann Dower SUBJECT: GRACELAND SHORT PLAT - (19-105869-00-SU) 37325 8TH AVE S MEMORANDUM Public Works Department Public Works has reviewed the information submitted on December 17, 2019, generating the following comments: Plans 1. Right-of-way improvements are required. A right-of-way modification was granted in 2018 but it has expired. If the developer wishes to obtain a current modification, a request must be submitted and a new decision issued. Frontage improvements and associated drainage must be designed by a civil engineer licensed in the state of Washington. Engineering plans are required unless all frontage improvements are waived through the modification process. 2. The street sections must be shown on the plans. 3. Show the city file number, 19-105869-00-SU, on the plans in the upper left corner. 4. The plans must be updated with a current stamp and signature for the surveyor. 5. Show the location of all structures with a distance from the existing and proposed property lines if within 50 feet. Technical Information Report 6. The Technical Information Report must be completed and stamped by a Civil Engineer licensed in the state of Washington. A Structural Engineer stamp and signature is not acceptable. 7. The TIR makes several inaccurate statements and assumptions. Please note the following and revise the text and the worksheet: ■ Unless frontage improvements are completely waived, engineering plans will be required for the road and associated storm drainage. Plans must also be provided for onsite flow control and conveyance. • Erosion and sediment control is required for every project that constructs frontage improvements or disturbs land. • Each lot must be expected to create at least 4,000 square feet of impervious area and an appropriately -sized Best Management Practice (BMP) must be located on each lot or a detention facility provided. BMP's must be reviewed and approved by King County Health so that they do not conflict with the proposed septic design. • A conveya,.-e system for the homes may not be s...,ply connected to the public right-of-way without first providing a properly designed BMP or flow control system. The City does not maintain detention facilities for private property. Water quality treatment may be required, depending upon the amount of new pollution -generating impervious surface created by the required frontage improvements. • BMP's for the site must be fully vetted and implemented to the extent feasible. The short plat is not exempt from this requirement. • Enhanced Basic water quality is required for this parcel. SUB-DIVIF 4 PREAPPLI ATION REPORT REG0RL31J.13 NUV6t_ K,_4 r. a % 1SUbMjATTCHpjA R UT DIRECTION MAP �WjjapPj, in aad Other OR O.CAiIGuired nis in THE PROPER TYfeJ r QC PUBLIC HEALTH — SEAT➢ LE & KING COUi%" APPLIC&n0N MUST BE SUBMITTED13Y A E WMONA ENTA➢. HEALTH IDfW%0N LICENSED SEPTIC SYSTEM DESIGNER OR REQUEST FOR SUIRDWISION PRFrAPP➢ ICAT➢ON REVIEW PROFESSIONAL ENGINEER Complete the following and submit Mth the appropriaty . wu•�v.kingcoiin[�•.�tavleiisr�; s SUBMLY AMICATIONS TO: Eastoe Earuroassen at Reaith 1d350 F.ustgate Way, Bellevue, WA 9M7-r-458 Phone: (206) 477-8050 APPROXIMATE STREET ADDRESS 37325 8th Ave S Federal Way, WA98003 NAME ANDIOR NUMBER OF D.P.E.R. APPLICATION LEGAL DESCRIPTION E 518 FT OF S 1/2 OF N 1/2 OF SE 1/4 OF NW 114 LESS CO RD PARCEL # 21 21 1 10141-1910 2 1 3 NUMBER OF ACREs 3.43 NUMBER OF LOTS TO BE REVIENED 4 SMALLESTLOT SIZE 35-185 S0. FT. OWNER Eunhee Kim ADDRESS same as above PRONE## 8-321-2957 AGENT Eul S Kim ADDRESS Same as above PHONE# 8I 321-4243 THE FOLLOWIING INFORMATRON MUST BE PROVIDED, WATER SUPPLY Comnle Section 'lot 2 below Section 1. XC� Existing Public Water Supply Lakehaven Water & Sewer District Attach Certificate of Water Avaliabilii'j (Name) Section 2. ® Proposed Pub€lc Water Supply Lakehaven Water & Sewer District (Name) ® Copy Da Well Source Site Review! Letter ® Copy of Declaration of Covenant(s) ® Copy of Restrictive Covenants) (if applicable) Sg3�ME-DISPOSAL,LQMiniete-Secfion 1.2 or 3 belowi Section 1. ❑ Existing Sewer System Attach Certificate of Sewer Availability ®Recording # , or To be recorded wi=h final approval ® Recording 4 or To be recorded w€. final approval (Name) Section 2. XZ lndivldual On -Site Sewage Systems (OSS) ® Critical Area Review from the SWIding Official n Attach Soil Log Descriptions including soil Type desigrralton; (Mini rr mt 2 per lot) end 0 Plot Plan (to include lot lines, lot sizes, location of existing sewage system(s) and solR log holes) Section 3. 11 Community/Larger On -Site Sewage System (Attach Preliminary Report) I, hereby, cer ify that the information givan 'n this appli tal ratavpresentation of IhCe id ng conditions on this plat. Signature of OwnerlAgent �7 Date Name of Licensed OSS Ekes€-rIP.E. (please p6n1) Sudhir M Adetttiwar License # 31 h Signature of Licensed OSS Designer/P.E Date 9/28/2019 E&APPROVED q _6�`1 WV C1 DISAPPROVED I "� -Zb(R (Date) L.1 (Health &Environmenal lnvEl gator) (els�i 1� C COMMENTSICONDMONS Tee f1 t aver A- r er ��... AA-I.R"_�� . ,any persons aggrieved by any decision or final arderat the Health OFMc may ills a written apppcatlon ZI a r�iOil11. Wn-t7 ' days of the dale of the above deeis€ore. (Title 13, K-C-MO.H. Chapter 13.12 - 8eviaga Revietr Catr MUtse. "I IZOR 11_A_Rev 3.13.13 - Previous Versions are Obsolete ' FJE�UL DATE RFCFNFD ®®gg 2 5 ton ASTGATE c i l�►1r�3~l'.. TF: SUB-DIVIF� PRE -APPLICATION REPORT ntu; """"% �] (� (Submit Application, A. n and Other Required Documents in Quadruplicate) S U U 7 `T 1 7 �2 ATTACH A ROUTEIDIRECTION MAP FOR LOCATING THE PROPERTY HEALTM uerrl-Piat UNLT I PUBLIC HEALTH — SEATTLE & KING COUNTY APPLICATION MUST BE SUBMITTEDBY A ENVIRONMENTAL HEALTH DIVISION LICENSED SEPTIC SYSTEM DESIGNER OR REQUEST FOR SUBDIVISION PRE -APPLICATION REVIEW PROFESSIONAL ENGINEER Complete the following and submit with the appropriate fee. µ�vw,kingceunty. eovlchsfoes SUBMIT APPLICATIONS TO: Eastgate Environmental Health 14350 Eastgate Way, Bellevue, WA 98007-6458 Phone: (206) 477-8050 APPROXIMATE STREET ADDRESS 37325 8th Ave S Federal Way, WA 98003 NAME AND/OR NUMBER OF D.P.E.R. APPLICATION LEGAL DESCRIPTION. E 518 FT OF S 1/2 OF N 112 OF SE 1/4 OF NW 1/4 LESS CO RD PARCEL # 13mi 21 21 1 10141—J91 0121 3 NUMBER OF ACRES 3.43 NUMBER OF LOTS TO BE REVIEWED 4 SMALLEST LOT SIZE 35,185 SO. FT. OWNER Eunhee Kim ADDRESS same as above PHONE# 81&321-2957 AGENT Eui S Kim ADDRESS Same as above PHONE# 818-321-4243 THE FOLLOWING INFORMATION MUST BE PROVIDED: WATER SUPIP LY ICom fete Section 1or 2 below : Section 1. ❑X Existing Public Water Supply Lakehaven Water & Sewer District Attach Certificate of Water Availability (Name) Section 2. © Proposed Public Water Supply Lakehaven Water & Sewer District ame ❑ Copy of Well Source Site Review Letter ❑X Copy of Declaration of Covenant(s) ❑ Recording # or To be recorded with final approval ❑ Copy of Restrictive Covenant(s) ❑ Recording # or (if applicable) To be recorded with final approval SEWAGE DISPOSAL (Comp et ion 1 2 Qr 3 b to : Section 1. ❑ Existing Sewer System Attach Certificate of Sewer Availability (Name) Section 2. ❑X Individual On -Site Sewage Systems (OSS) © Critical Area Review from the Building Official ® Attach Soil Log Descriptions including soil type designation; (Minimum 2 per lot) and © Plot Plan (to include lot lines, lot sizes, location of existing sewage system(s) and soil log holes) Section 3. ❑ Community/Larger On -Site Sewage System (Attach Preliminary Report) I, hereby, certify that the information given in this application is a true and to representation of the wdsting conditions on this plat. Signature of Owner/Agent Date Y 1 a Name of Licensed OSS Des gnerlP.E. (please print) 9OFir M Adettiwar License # 31721 Signature of Licensed OSS Designer/P.E Date ❑ APPROVED ❑ DISAPPROVED (Date) (Health & nvtronmenta nvestkgator) (District Supervisor) COMMENTS/CONDITIONS Any parson aggrieved by any decision or final order of the Health Officer may ilia a written application to health officer within 60 calendar days of the date of the ahava decision. (Tide 13, K.C.B.O.H. Chapter 13.12 -'Sewage Review Committee. FORM ! Rev 3 13.13 - Previous Versions are Obsoleie juwakwocd.& v E D JUL 2 5 201. EAS ENVIRONMENTAL HEALTH April 30, 2019 Eui Kim Page 2 6. The predominant soil type in the upper 30" inches of soil appears to be in the type 4 soil classification (Fine sands, loamy fine sands, sandy loams, loams). BOH KCC 13.28.070 Required absorption area & Table 13.28-4 7. There appears to be setback issues with proposed locations of test pit l and 2. There appears to be 4'-5' out to the north of test pit 1 and a garage to the south. With the minimum setback required from a downslope cut and the upslope building setback there does not appear to be adequate square footage to locate a drainfieid in this area. It is also not clear if there will be adequate drainfield area to meet the setback to the existing wastewater tanks and proposed western property -line for lot .one near test pit 2. BOH KCC13.28.020 Ali Design support -- materials & General design requirements 13.28.030 W r 011pi New applications will require a new fee of $369.60 if submitted within 12 months of the date of this letter, and will be reviewed for compliance with rules in effect at the time of resubmittai. New applications will require a new fee of $1515-00 (Or current full fee) if submitted after 12 months of the date of this letter, and will be reviewed for compliance with rules in effect at the time of resubmittal. If you have any questions, please contact me at (206) 477-8137 between the hours of 8:00 AM and 5:00 PM or leave a message on my voice mail. NOTE: ANY PERSON AGGRIEVED BY ANY RECISION OR ORDER OF THE HEALTH OFFICER MAY NOT LATER THAN 5 P.M. OF THE SIXTIETH (60Tn) CALENDAR DAY OF THE DECISION OR ORDER, FILE A WRITTEN APPEAL TO THE HEALTH OFFICER FOR RECONSIDERATION OF SUCH DECISION OR ORDER. APPEALS FOR RECONSIDERATION ARE CONDUCTED VIA THE SEWAGE REVIEW COMMITTEE PROCESS PER KING COUNTY BOARD OF HEALTH, CHAPTER 13.12. APPLICATION FORMS FOR APPEAL ARE AVAILABLE AT THE EASTGATE PUBLIC HEALTH CENTER SHOULD YOU CHOOSE TO APPLY FOR RECONSIDERATION OF THIS DECISION/ORDER. Sincerely, Jarone Baker, R.S. Health and Environmental Investigator 11 Community Environmental Health cc: City of Federal Way Department of Community Development Eunhee Kim AMERICAN C,EOSEP,VICtS Septic Feasibility Report 37325 8th Ave S, Federal Way, WA 98003 Date: April1, 2019 (Revised September 12, 2019) Project No: 0177-WA19 AMERICAN COLpRADO GEoSERVICES CCO'rECHN)2,, JALS NrR���avrnr. � WYOMING 0141 AND SCILV , OREGON � WASHINGTON 888276.M7 BOA April 1, 2019 (Revised September 12, 20 19) PROJECT NO: 0177-WA19 Client: Mrs. Grace Kim Reference: Septic Feasibility Report373 n, 25 8 Avenue S., Federal Way At your request, we have accordance with the completed the septic feasibility design American GeoServices report for the gn recommendations are described below. t LLC (AGS referenced Project in propQSal. Results of our evaluation and Soils profile: Medium sands, loamy 2.5 -3.0 f°flowed b my coarse sands, loam maximum y gravelly to very gravel) y medium sands explored depi-h of 8 feet y coarse ' (Soil Type 3) in u sands (Soil Type 1 Aper emending to the Groundwater: Not encountered; Soil Mottling ttlmg present within 2.5-3.0 feet of the ground Design Long Term m Accep#ante 9 and surface. Gravity or Pressure Distribution: {LTgR) or Loading �stribution: 0.80 9 Rate for Residential Effluent (fluent Using Site is suitable for WA' On -site Sew Provided waste treatment as age Regulations, per the components most °f on -site sewage adequate current Kin ge systems. setbacks are g County, provided for all the SITE INVESTIGATION In March 2019 test pits , nine test pits (TP1 throw (TP10 through TP12 through TP9) were explored 1 and Figure 2. ) Were in the and in Jul All soil samplesproposed general se Y 2019 three additional and transported were identified in the field septic field area as show measure to the laborato and were n in Figure measurements or soil ry for further testis placed in sealed co Mottling measurementsg and classify stainers were taken cation. Groundwater level 2663 Cinnabar Rd during exploration Coiarado Springs� CO 80921 Ph: (719} 75I 607 www.american and after the 2 sma@arnerIcangevservices.com Mailing: Ph: (888 geoservices,com 9: 191 lJniversi Fx: �8771 47p 4027 e $iVd, 375 0369 Denver, Cq 80206 Ph: (303} 325 34969 completion of exploration. Laboratory analysis included soil classification by visual evaluation. After the completion of subsurface exploration, all exploration locations were staked and left open for future observations. In addition, we reviewed following available soils literature and public domain websites on the site area: ■ Soil Survey of King County, USDA, SCS • Geology of Washington, USGS • Geologic Maps, King County • The Washington Geologic Information Portal • USGS Topographic Maps • U.S. Geological Survey, Open File Reports • King County, GIS Data obtained from site observations, subsurface exploration, laboratory evaluation, and previous experience in the area was used to perform engineering analyses. Results of engineering analyses were then used to reach conclusions and recommendations presented in this report. SURFACE CONDITIONS The site is as shown in Figure 1 through Figure 4. There are no existing structures at the site near the proposed explorations. Based on our review of available USGS topographic map and site visit, the site is gently sloping downwards to the northwest with a slope of approximately 6-9%. There are no natural or known cultural features of concern at the site. There is no current or historic land use at the site that is of concern for the proposed septic system. Based on the site reconnaissance, in our opinion, there will be surface water run-off and accumulation if proper stormwater management is not implemented. It is the owner's responsibility to make sure all the surface water will be diverted away from the septic field area so that surface water run-off does not accumulate at or near the proposed septic field. SUBSURFACE CONDITIONS Available NRCS soil survey map data (Web Soil Survey) revealed that site is underlain by "Alderwood Gravelly Sandy Loam, 8% to 15% slope." Following soil classification and identification is based on commonly accepted methods employed in the practice of civil and septic engineering. It should be recognized that subsurface conditions often vary both with depth and laterally between- individual boring -locations:- The following - is -a summary of the subsurface conditions encountered at the site. The USCS soil classification logs are included in an appendix. Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Paoe No: 2 of 11 TP1 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-6" Topsoil Medium sands, Gravelly silty loamy coarse No 6"-30" sand sands, loamy 4 0.6 groundwater (SM/GM) medium to fine table sands Silty sandy Gravelly to No 30 30"-84" very gravelly 3 0.8 groundwater gravel (GM) sands table Gravelly to Cemented No 84"-96" silty sandy very gravelly 1 Limiting layer groundwater sands, gravel (GM) table cemented TP2 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-6" Topsoil Medium sands, Gravelly silty loamy coarse No 6"-40" sand sands, loamy 4 0.6 groundwater (SM/GM) medium to fine table sands 33 Gravelly to No Silty sandy 40"-84" very gravelly 3 0.8 groundwater gravel (GM) sands table Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 3 of 11 TP3 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 001-81, Topsoil Gravelly silty Medium sands, No loamy coarse 8"-40" sand 4 0.6 groundwater (SM/GM) sands, loamy table medium sands 30 Gravelly to No Silty sandy 40"-96" gravel (GM) very gravelly 3 0.8 groundwater sands table TP4 Depth to Depth JSCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) Topsoil Gravelly silty Medium sands, No loamy coarse 8"-36" sand 4 0.5 groundwater (SM/GM) sands, loamy table medium sands 33 Gravelly to No Silty sandy 36"-96" gravel (GM) very gravelly 3 0.8 groundwater sands table Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 4 of 11 TP5 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-12" Topsoil Medium sands, loamy coarse Gravelly silty sands, loamy No 12"-36" sand medium sands; 4 0.6 groundwater (SM/GM) Occasional table roots and 36 organics Silty sandy Gravelly to No 36"-96" gravel (GM) very gravelly 3 0.8 groundwater sands table TP6 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-101, + Topsoil Medium sands, Gravelly silty loamy coarse No 10"-36" sand sands, loamy 4 0.6 groundwater (SM/GM) medium sands; table some clay Silty sand y Gravelly to No 36 36"-72" gravel (GM) very gravelly 3 0.8 groundwater sands table Gravelly to Cemented No 72"-96" silty sandy very gravelly Limiting layer groundwater sands, gravel (GM) table cemented Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 5 of 11 TP7 Depth USCS Soil Textural Soil Loading Rate Ground (Inches) Classification Classification Type (gal/sq.ft./day) water Table 0"-12" Topsoil Medium sands, Gravelly silty loamy coarse No 12"-36" sand sands, loamy4 0.6 groundwater (SM/GM) medium sands, table trace roots and organics Gravelly to No 36"-96" Silty sandy very gravelly 3 0.8 groundwater gravel (GM) sands table Depth to Soil Mottling (inches) 30 TP8 Depth USCS Soil Textural Soil Loading Rate Ground Depth to Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-12" Topsoil Medium sands, Gravelly silty loamy coarse No 12"-36" sand sands, loamy4 0.6 groundwater (SM/GM) medium sands, table trace roots and 27 organics Gravelly to No 36"-96" Silty sandy very gravelly 3 0.8 groundwater gravel (GM) sands table Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 6 of 11 TP9 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-8" Topsoil FILL: Silty gravelly Medium sands, sand, , some loamy coarse No trash, some sands, loamy 4 0.6 groundwater organics medium sands table 36 (SM) Gravelly to No Silty sandy 30"-96" gravel (GM) very gravelly 3 0.8 groundwater sands table TP10 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-8" Topsoil Silty gravelly Medium sands, sand with No 8"-60" some loamy coarse 4 0.6 groundwater sands, loamy cobbles table medium sands (SM) Silty sandy 48 gravel, some Gravelly to No cobbles, 60"-96" veryravel) gravelly 3 0.8 groundwater some silty sands table cementation noted (GM) Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 7 of 11 TP11 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-8" Topsoil Silty gravelly Medium sands, No 8"-60'° sand with loamy coarse 4 0.8 groundwater some sands, loamy table cobbles (SM) medium sands Silty sandy grave, some Gravelly to No 60"-96" cobbles, very gravelly 3 0.8 groundwater minor sands table cementation noted (GM) 50 TP12 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0"-12" 1 Topsoil Silty gravelly Medium sands, No 12"-60'° sand with loamy coarse 4 0.6 groundwater some sands, loamy table cobbles (SM) medium sands Silty sandy 50 gravel, some Gravelly to No 60"-96" cobbles, very gravelly 3 0.8 groundwater some sands table cementation noted (GM) Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 8 of 11 GROUNDWATER Groundwater table or perched groundwater table was not encountered during explorations within 8 feet below the ground surface, and based on our local experience, groundwater table is not anticipated to be present within 15 feet of the ground surface. However, soil mottling was noted at depths ranging from 27" to 50" below the ground surface. This observation may not be indicative of other times or at locations other than the site. Some variations in the groundwater level may be experienced in the future. Seasonal perched groundwater conditions may be encountered at higher depths during an unusual rainy season. The magnitude of the variation will largely depend upon the duration and intensity of precipitation, temperature and the surface and subsurface drainage characteristics of the surrounding area. CONCLUSIONS and RECOMMENDATIONS Based upon the results of our On -site sewage system feasibility study, in our opinion, the site is suitable for such a system to be designed and constructed in accordance with current King County regulations and/or King County Board of Health guidelines, provided following recommendations are followed: ■ Adequate stormwater manag ;ment should be designed and implemented because there will be surface water run-off and accumulation if proper stormwater management is not implemented. It is the owner's responsibility to make sure all the surface water will be diverted away from the septic field area so that surface water run-off does not accumulate at or near the proposed septic field. ■ Depending upon the site grading, proposed house location, number of bedrooms, and the proposed soil treatment area (STA) or leach field or drain field location, a properly designed septic system along with proper setbacks should be used to satisfy local and state regulations. ■ The STA or leach field or drain field can be located on site without encroaching easements, flood plain, adjacent lake, or creek or any wetlands. ■ More than six bedrooms per house should not be planned. ■ We recommend that AGS services are retained to design the septic system in accordance with the most current King County regulations. Above recommendation may be modified based on further investigation and analyses. Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 9 of 11 LIMITATIONS Design Data/Recommendations contained in this report are based on our field observations and subsurface explorations, limited site evaluation, and our present knowledge of the proposed construction as described by you. It is possible that soil conditions could vary between or beyond the points explored. If soil conditions are encountered during construction that differ from those described herein, we should be notified so that we can review and make any supplemental recommendations necessary. If the scope of the proposed construction, including the proposed use, number of occupants, or structural locations changes from that described in this report, our recommendations should also be reviewed and revised by AGS. Our scope of work did not include any investigation or evaluation of any kind related to the lake, flood hazard evaluation, wetlands evaluation and mitigation, and any evaluation of any kind related to floods, creeks, hydrology, wetlands, and stormwater management. Our Scope of Work for this project did not include research, testing, or assessment relative to past or present contamination of the site by any source. If such contamination were present, it is very likely that the exploration and testing conducted for this report would not reveal its existence. If the Owner is concerned about the potential for such contamination, additional studies should be undertaken. We are available to discuss the scope of such studies with you. No tests were performed to detect the existence of mold or other environmental hazards as it was beyond Scope of Work. Local regulations regarding land or facility use, on and off -site conditions, or other factors may change over time, and additional work may be required with the passage of time. Based on the intended use of the report within one year from the date of report preparation, AGS may recommend additional work and report updates. Non-compliance with any of these requirements by the client or anyone else will release AGS from any liability resulting from the use of this report by any unauthorized party. Client agrees to defend, indemnify, and hold harmless AGS from any claim or liability associated with such unauthorized use or non-compliance. In this report, we have presented judgments based partly on our understanding of the proposed construction and partly on the data we have obtained. This report meets professional standards expected for reports of this type in this area. Our company is not responsible for the conclusions, opinions or recommendations made by others based on the data we have presented. This report has been prepared exclusively for the client, its' engineers and subcontractors for the purpose of design and construction of the proposed structure. No other engineer, consultant, or contractor shall be entitled to rely on information, conclusions or recommendations presented in - this document without the prior written approval of AGS. Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 10 of 11 We appreciate the opportunity to be of service to you on this project. If we can provide additional assistance or observation and testing services during design and construction phases, please call us at 1 888 276 4027. Sincerely, 7/2/2021 Sam Adettiwar,- MS, PE, GE, P.Eng, M.ASCE Senior Engineer Attachments Project No: 0177-WA19 April 1, 2019 (Revised September 12, 2019) Page No: 11 of 11 FIGURES Dash Point bra Commencement Say M Tacoma �;r:�,.� en r 11 C,7 Emerald Queen Casino Leh1ay - America s (� + Car museum Y v 07 (5 REFERENCE: �T GOOGLE MAPS 1V USGS TOPOGRAPHIC MAPS Auburn 18 636) L 16 v Algona 37325 8th Avenue South 1fi3� Pacific Fife Heights, eBiTEMMON f1=' fe (R-9 ,167 ,� �&MER CAN GEOSERVICES FIGURE 1: SITE LOCATION MAP k'hli2?G•Ui?' . bariexe�.�rriCCs,dxn � § — — — — Z 2 F- j \ 3 » � � | _ $G _) $ _ \] ! | , � \° l 4 § § § k` «E � . q|| _JECTTIT-.. SMALL LOT _SUBDIVISION(PLANED) - -- — — �< / _ »' � • — �SOIL cam,_ � • r S I Olt, Qa "V � K I �• 'gin :: ]�.� -...�i ,y: � pf QvIrl J. or iV/ � x � CYl �.ti1'• �: 1. LEGEND lee- onlact deposit's Curl Recessional Iacustrine rdepoMts N REFERENCE 1!�TRICAN GEOSER ICC U.S. GEOLOGIC SURVEY d.jf;r- , FIGURE 3: GEOLOGIC MAP LEGEND King County Area, Washington (WA633) King County Area, Washington (WA633) Map Unit Map Unit Name Symbol AgC Alderwood gravelly sandy loam, 8 to 15 Percent slopes Acres Percent in of A01 A4I 7.4 97.6% No Norma sandy loam 8.2 2.40/a Totals for -Are of Interest 7.6 1009 O'D/o (D N REFERENCE: 1 A&'iFI-AN GFO-R}'10FIGURE 4: SOIL SURVEY MAP WEB SOIL SURVEY APPENDIX TP1 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Geologist/Engineer SMA Date Excavated 03-14-2019 Test Pit Width 3-4 feet tM f O J Description / Lithology a c� 'L^ V TOPSOIL: 6" thick GRAVELLY SILTY SAND, damp, light brown Simito gray; medium dense, fine to coarse grain GM sand, some gravel, pebbles, and cobbles SILTY SANDY GRAVEL, damp, light brown to gray; medium dense, fine to coarse grain sand, pebbles, and some cobbles GM Dense below 7 feet: Hard digging due to large and cemented cobbles End of Exploration. Mottling was noted at a depth of 2.5 feet. Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. Excavator John Deere 50G Ground Elevation See Figures Total Depth of Borehole 8 Feet Depth to Water Not Encountered E Tr a Q � L 0 O Qi > a o = Q. a m o n '0 as E m C � m .o o 3 O 0 CoN W 0 J N V —5 1 1 AMEFUCAN GEOSFRVICES 1 i Page 1 TP2 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Geologist/Engineer SMA Date Excavated 03-14-2019 Test Pit Width 3-4 feet of O J Description / Lithology .O Q M& TOPSOIL: 6" thick GRAVELLY SILTY SAND, damp, light brown ? SM/ to gray; medium dense, fine to coarse grain GM sand, some gravel, pebbles, and cobbles Excavator John Deere 50G Ground Elevation See Figures Total Depth of Borehole 8 Feet .Depth to Water Not Encountered o O \ o m a 3 O L iF: a Q. E MM W > V y CL O o cc as W o N SILTY SANDY GRAVEL, damp, light brown to gray; medium dense, fine to coarse grain 5 e GM sand, pebbles, and some cobbles. Dense below 7 feet: Hard digging due to large and — cemented cobbles C End of Exploration. Mottling was noted at a depth of 2.75 feet. 1 Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. 1 I ' AMERICAN GEQSERVICES I Va�+.�....m Page 1 1+ TP3 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Geologist/Engineer SMA Date Excavated 03-14-2019 Test Pit Width 3-4 feet 0 O J Description / Lithology t O. T L. c� TOPSOIL: 8" thick SILTY GRAVELLY SAND, damp, light ;�, j SM brown to brown gray; medium dense, fine to r: GM coarse grain sand, some gravel, pebbles, and cobbles, trace clay q < SILTY SANDY GRAVEL, damp, light brown to brown, gray; medium dense GM to dense, fine to coarse grain sand, - pebbles, and some cobbles. e End of Exploration. Mottling was noted at a depth of 2.5 feet. Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. Excavator John Deere 50G Ground Elevation See Figures Total Depth of Borehole 8 Feet Depth to Water Not Encountered 7 o O L) J E Q. m V N G� Rf ~ G1 .O ❑ J ❑ cn N ❑ J 5 1 1 0 m AMERICAN GEOSERVICES Page 1 V �Q�-W 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Geologist/Engineer SMA Date Excavated 03-14-2019 Test Pit Width 3-4 feet 0) O J a M V C Description 1 Lithology TP4 Excavator John Deere 50G Ground Elevation See Figures Total Depth of Borehole 8 Feet Depth to Water Not Encountered C 0 O \ o O m L a O i+ N �' O J G to N tY TOPSOIL: 8" thick SILTY GRAVELLY SAND, damp, light brown SMJ to brown gray; medium dense, fine to coarse GM grain sand, some gravel, pebbles, cobbles SILTY SANDY GRAVEL, damp, light brown to brown, gray; medium dense to dense, fine to coarse grain sand, pebbles, and some 5 GM cobbles. End of Exploration. Mottling was noted at a depth of 2.75 feet. 1 Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. 1 a CL 3 c N V AMERICAN GEOSERVICES Page 1 TP5 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Excavator John Deere 50G Geologist/Engineer SMA Ground Elevation See Figures Date Excavated 03-14-2019 Total Depth of Borehole 8 Feet Test Pit Width 3-4 feet Depth to Water Not Encountered C � ^ ^ o 0 ^ O V ' J O Description / Lithology "' c a) a) a m Q. CaO O Q IZZ a as Q E coo TOPSOIL: 12" thick SILTY GRAVELLY SAND, damp, light brown SMJ to brown gray; medium dense, fine to coarse GM grain sand, some gravel, pebbles, cobbles, occasional roots and organics — SILTY SANDY GRAVEL, damp, light brown to brown, gray; medium dense to dense, fine to — ` " coarse grain sand, pebbles, and some — 5 < GM cobbles. < v End of Exploration. Mottling was noted at a depth of 3.00 feet. —10 Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. —15 —20 AMERICAN GEOSERVICES Page 1 TP6 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Excavator John Deere 50G Geologist/Engineer SMA Ground Elevation See Figures Date Excavated 03-14-2019 Total Depth of Borehole 8 Feet Test Pit Width 3-4 feet Depth to Water Not Encountered = o 0 O V J O IU Description / Lithology .4T a. O m > c .. .� o N o v TOPSOIL: 10" t Ick SILTY GRAVELLY SAND, damp, light brown SM/ to brown gray; medium dense, fine to coarse GM grain sand, some gravel, pebbles, cobbles, _ some clay [ SILTY SANDY GRAVEL, damp, light brown to brown, gray; medium dense to dense, fine to coarse grain sand, pebbles, and some GM cobbles. Dense and hard digging below 6 feet 5 End of Exploration. Mottling was noted at a depth of 3.00 feet. Groundwater was not encountered during 1 or at the completion of exploration. At completion, exploration staked and flagged. 1 I AMERiCRLISERVICES Page 1 1 .e�rr6a0I1 • III TP7 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Excavator John Deere 50G Geologist/Engineer SMA Ground Elevation See Figures Date Excavated 03-14-2019 Total Depth of Borehole 8 Feet Test Pit Width 3-4 feet Depth to Water Not Encountered o O ^ O V `� \ ' v J C O Description / Lithology �, c �' a m a E m > A c a o .\� _ m a E tj o N a. u U TOPSOIL: 12" thick N SILTY GRAVELLY SAND, damp, light brown .=: SM/ to orange brown and gray; medium dense, GM fine to coarse grain sand, some gravel, —_pebbles, cobbles, trace roots and organics ~ SILTY SANDY GRAVEL, damp, light brown to brown, gray; medium dense to dense, fine to n coarse grain sand, pebbles, and some 5 GM cobbles. o < C End of Exploration. Mottling was noted at a depth of 2.50 feet. 1 Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. 1 II AMEfUCAN GEOSERVICES Page 1 TP8 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Excavator John Deere 50G GeologistlEngineer SMA Ground Elevation See Figures Date Excavated 03-14-2019 Total Depth of Borehole 8 Feet Test Pit Width 3-4 feet Depth to Water Not Encountered O 0 o t 0 _ O Description / Lithology .�°'., d 3 O � m IL a 4) . °' Q .c ++ Q- m > O M a .. `. — Q- C9 o N o J N Ci U) l TOPSOIL: 12" thick SILTY GRAVELLY SAND, damp, light SM brown to brown and gray; medium dense, GM fine to coarse grain sand, some gravel, -pebbles, cobbles, trace roots and organics ~ C .� SILTY SANDY GRAVEL, damp, light brown to J tin brown, gray; medium dense to dense, fine to coarse grain sand, pebbles, and some 5 C GM cobbles. t C End of Exploration. Mottling was noted at a depth of 2.25 feet. 10 Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. 15 20 ' AMERICAN GEOSERVICES Page 1 TP9 37325 8th Ave S, Federal Way, 98003 Project Number 0177-WA19 Excavator John Deere 50G Geologist/Engineer SMA Ground Elevation See Figures Date Excavated 03-14-2019 Total Depth of Borehole 8 Feet Test Pit Width 3-4 feet Depth to Water Not Encountered = 0 o o O U ^ ... J O Description / Lithology .4'.. cCL �' a Q Q. m N o _ d O. cc ' TOPSOIL: 8" thick SM FILL: SILTY GRAVELLY SAND, loose to medium dense, some trash, some organics SILTY SANDY GRAVEL to SILTY GRAVELLY SAND, damp, light brown to brown, gray; medium dense to dense, fine to coarse grain sand, pebbles, and some 5 GM cobbles. C End of Exploration. Mottling was noted at a depth of 3.00 feet. 1 Groundwater was not encountered during or at the completion of exploration. At completion, exploration staked and flagged. 1 I ' AMERICAN GEOSFRVICES Page 1 Map Unit Description: Alderwood gravelly sandy loam, 8 to 15 percent slopes —King County Area, Washington King County Area, Washington AgC—Alderwood gravelly sandy loam, 8 to 15 percent slopes USDA Natural Resources Conservation Service Map Unit Setting National map unit symbol. 2t626 Elevation: 50 to 800 feet Mean annual precipitation: 20 to 60 inches Mean annual air temperature: 46 to 52 degrees F Frost -free period. 160 to 240 days Farmland class cation: Prime farmland if irrigated Map Unit Composition Alderwood and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Alderwood Setting Landform: Ridges, hills Landform position (two-dimensional): Shoulder Landform position (three -dime nsional): Nose slope, talf Down -slope shape: Linear, convex Across -slope shape: Convex Parent material. Glacial drift and/or glacial outwash over dense glaciomarine deposits Typical profile A - 0 to 7 inches: gravelly sandy loam Bw1 - 7 to 21 inches: very gravelly sandy loam Bw2 - 21 to 30 inches: very gravelly sandy loam Bg - 30 to 35 inches: very gravelly sandy loam 2Cd1 - 35 to 43 inches: very gravelly sandy loam 2Cd2 - 43 to 59 inches: very gravelly sandy loam Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: 20 to 39 inches to densic material Natural drainage class: Moderately well drained Capacity of the most limiting layer to transmit water (Ksat): Very low to moderately low (0.00 to 0.06 in/hr) Depth to water table: About 18 to 37 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Very low (about 2.7 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4s Web Soil Survey National Cooperative Soil Survey 3/14/2019 Page 1 of 2 Map Unit Description: Alderwood gravelly sandy loam, 8 to 15 percent slopes --King County Area, Washington Hydrologic Soil Group: B Forage suitability group: Limited Depth Soils (G002XS301WA), Limited Depth Soils (G002XF303WA), Limited Depth Soils (G002XN302WA) Hydric soil rating: No Minor Components Everett Percent of map unit: 5 percent Landform: Kames, eskers, moraines Landform position (two-dimensional): Shoulder, footslope Landform position (three-dimensional): Crest, base slope Down -slope shape: Convex Across -slope shape: Convex Hydric soil rating: No Indianola Percent of map unit: 5 percent Landform: Eskers, kames, terraces Landform position (three-dimensional): Tread Down -slope shape: Linear Across -slope shape: Linear Hydric soil rating: No Shalcar Percent of map unit: 3 percent Landform: Depressions Landform position (three-dimensional): Dip Down -slope shape: Concave Across -slope shape: Concave Hyddc soil rating: Yes Norma Percent of map unit: 2 percent Landform: Depressions, drainageways Landfonn position (three-dimensional): Dip Down -slope shape: Concave, linear Across -slope shape: Concave Hydric soil rating: Yes Data Source Information Soil Survey Area: King County Area, Washington Survey Area Data: Version 14, Sep 10, 2018 USDA Natural Resources Web Soil Survey 3/14/2019 Conservation Service National Cooperative Soil Survey Page 2 of 2 AMER.ICAN GEOSERVICES DESCRIPTIVE TERMINOLOGY & SOIL CLASSIFICATION UNIFIED SOIL CLASSIFICATION SYSTEM UNIFIED SOIL CLASSIFICATION AND SYMBOL CHART COARSE -GRAINED SOILS (more than 50% of material is larger than No. 200 sieve size.) Clean Gravels {Less than 5% fines) GW Well -graded gravels, gravel -sand mixtures, little or no fines GRAVELS More than 50% GP Poorly -graded gravels, gravel -sand of coarse mixtures, little or no fines fraction larger Gravels with fines (More than 12%fines) than No.4 sieve size GM Silty gravels, gravel -sand -silt mixtures GC Clayey gravels, gravel -sand -clay mixtures Clean Sands Less than 5% fines) SW Well -graded sands, gravelly sands, little or no fines SANDS 5( % or more 7sp Poorly graded sands, gravelly sands, of coarse little or no fines fraction smaller Sands with fines More than 12%fines than No. 4 sieve size I, SM I Silty sands, sand -silt mixtures Sc Clayey sands, sand -clay mixtures FINE-GRAINED SOILS (50% or more of material is smaller than No. 200 sieve size.) Inorganic silts and very fine sands, rock SILTS ! ML flour, silty of clayey fine sands or clayey AND ! j silts with slight plasticity CLAYS Inorganic clays of low to medium Liquid limit CL plasticity, gravelly clays, sandy clays, less than silty clays, lean clays 50% OL Organic silts and organic silty clays of low plasticity Inorganic silts, micaceous or MH diatomaceous fine sandy or silty soils, SILTS elastic silts AND CH CLAYS Inorganic clays of high plasticity, fat Liquid limit clays 500/0 or greater OH Organic clays of medium to high plasticity, organic silts HIGHLY ORGANIC PT Peat and other highly organic soils SOILS LABORATORY CLASSIFICATION CRITERIA Cu = D60 greater than 4; C = C30 between 1 and 3 GW D 10 ° D10 x C60 GP Not meeting all gradation requirements for GW GM Atterberg limits below "A" i + Above "A" line with P.I. between line or P.I. less than 4 4 and 7 are borderline cases GC Atterberg limits above "A" requiring use of dual symbols line with P.I. greater than 7 C = D60 D30 u greater than 4; Cc = between 1 and 3 SW D70 D1gxD60. Sp Not meeting all gradation requirements for GW SM Atterberg limits below "A" Limits plotting in shaded zone line or P.I. less than 4 with P.I. between 4 and 7 are Atterberg limits above "A" borderline cases requiring use Sc line with P.I. greater than 71 of dual symbols. Determine percentages of sand and gravel from grain -size curve. Depending on percentage of fines (fraction smaller than No. 200 sieve size), coarse -grained soils are classified as follows: Less than 5 percent . GW, GP, SW, SP More than 12 percent .................................. GM, GC, SM. SC 5 to 12 percent ................... Borderline cases requiring dual symbols PLASTICITY CHART 60 50 a 5PAiLINE: w 40 30 73(LL-20) } CL MH&OH t— v 20 f- auJ 10 .. u*"^� ML&OL f 0 0 10 20 30 40 50 60 70 80 90 100 LIQUID LIMIT (LL) (%) DESCRIPTIVE TERMINOLOGY & SOIL CLASSIFICATION CONSISTENCY OF COHESIVE SOILS LABORATORY/FIELD TESTING DEFINITIONS FOR EXPLORATION LOGS CONSISTENCY STP (BPF) uy PP (TSF) DID = DRY DENSITY (PCF) VERY SOFT 0-1 LESS THAN 0.25 SOFT 2-4 0.25-0.5 WD = WET DENSITY (PCF) MEDIUM STIFF -- 5-8 0.5 - 1.0 MC = MOISTURE CONTENT (%) STIFF 9 - 15 1.0 - 2.0 VERY STIFF 16 - 30 2.0 - 4.0 PL = PLASTIC LIMIT (%) --_ - HARD 30+ OVER 4.0 LL - LIQUID LIMIT (%) _ PI = PLASTICITY INDEX RELATIVE DENSITY OF COHESIONLESS SOILS OC - ORGANIC CONTENT (%) DENSITY �SPT (BPF) VERY LOOSE 0-4 S - SATURATION PERCENT (%) - LOOSE 5 - 10 SG = SPECIFIC GRAVITY MEDIUM DENSE - --- 11 -30 C = COHESION DENSE 31 -50 I 0 = ANGLE OF INTERNAL FRICTION VERY DENSE 50+ QU - UNCONFINED COMPRESSION STRENGTH PARTICLE SIZE IDENTIFICATION #200 = PERCENT PASSING THE #200 SIEVE 'NAME DIAMETER SIEVE NO. (INCHES) CBR = CALIFORNIA BEARING RATIO ROCK HLOCK >120 VS - VANE SHEAR BOULDER 12-120 PP = POCKET PENETROMETER COBBLE 3-12 DP = DRIVE PROBE GRAVEL SPT - STANDARD PENETRATION TEST COURSE 3/4-3 FINE 114 - 3/4 NO. 4 BPF = BLOWS PER FOOT (N VALUE) - - SAND SH = SHELBY TUBE SAMPLE COARSE 4.75 MM NO. 10 GW GROUND WATER MEDIUM 2.OMM NO. 40 FINE .425 MM NO. 200 RQD = ROCK QUALITY DESIDNATION- SILT .075 MM TP = TEST PIT CLAY �-' <0.005 MM B = BORING GRAIN SIZE HA = HAND AUGER - FINE <0.04 INCH FEW GRAINS ARE GRAINED DISTINGUISHABLE IN THE FIELD OR WITH HAND LENS. GROUNDWATER LEVELISEEPAGE MEDIUM 0.04-0.2 INCH GRAINS ARE ENCOUNTERED DURING EXPLORATION GRAINED DISTINGUISHABLE WITH THE AID OF A HAND LENS. COARSE 0.04-0.2 INCH MOST GRAINS ARE y GRAINED DISTINGUISHABLE WITH THE NAKED EYE. - STATIC GROUNDWATER LEVEL WITH I DATE MEASURED __�� DESCRIPTIVE TERMINOLOGY & SOIL CLASSIFICATION SPT EXPLORATIONS: STANDARD PENETRATION TESTING IS PERFORMED BY DRIVING A 2 - INCH O.D. SPLIT - SPOON INTO THE UNDISTURBED FORMATION AT THE BOTTOM OF THE BORING WITH REPEATED BLOWS OF A 140 - POUND PIN GUIDED HAMMER FALLING 30 INCHES. NUMBER OF BLOWS (N VALUE) REQUIRED TO DRIVE THE SAMPLER A GIVEN DISTANCE WAS CONSIDERED A MEASURE OF SOIL CONSISTENCY. SH SAMPLING: SHELBY TUBE SAMPLING IS PERFORMED WITH A THIN WALLED SAMPLER PUSHED INTO THE UNDISTURBED SOIL TO SAMPLE 2.0 FEET OF SOIL. AIR TRACK EXPLORATION: TESTING IS PERFORMED BY MEASURING RATE OF ADVANCEMENT AND SAMPLES ARE RETRIEVED FROM CUTTINGS. HAND AUGUR EXPLORATION: TESTING IS PREFORMED USING A 3.25" DIAMETER AUGUR TO ADVANCE INTO THE EARTH AND RETRIEVE SAMPLES. i DRIVE PROBE EXPLORATIONS: ANGULARITY OF GRAVEL & COBBLES ANGULAR i COARSE PARTICLES HAVE SHARP EDGES AND RELATIVELY PLANE SIDES WITH UNPOLISHED SURFACES. SUBANGULAR COARSE GRAINED PARTICLES ARE SIMILAR TO ANGULAR BUT HAVE ROUNDED EDGES. I j SUBROUNDED COARSE GRAINED PARTICLES HAVE NEARLY PLANE SIDES BUT HAVE WELL ROUNDED CORNERS AND EDGES. ROUNDED COARSE GRAINED PARTICLES HAVE SMOOTHLY CURVED SIDES AND NO L- EDGES. SOIL MOISTURE MODIFIER I DRY ABSENCE OF MOISTURE; DUSTY, DRY TO TOUCH MOIST DAMP BUT NO VISIBLE WATER WET VISIBLE FREE WATER WEATHERED STATE FRESH j NO VISIBLE SIGN OF ROCK MATERIAL WEATHERING PERHAPS SLIGHT 1 THIS "RELATIVE DENSITY" EXPLORATION DEVICE IS USED TO DETERMINE THE DISTRIBUTION AND DISCOLORATION IN MAJOR ESTIMATE STRENGTH OF THE SUBSURFACE SOIL . DISCONTINUITY SURFACES. AND DECOMPRESSED ROCK UNITS. THE RESISTANCE TO PENETRATION IS MEASURED IN SLIGHTLY DISCOLORATION INDICATES BLOWS-PER-1/2 FOOT OF AN 11-POUND HAMMER WEATHERED j WEATHERING OF ROCK MATERIAL AND WHICH FREE FALLS ROUGHLY 3.5 FEET DRIVING i DISCONTINUITY SURFACES. ALL THE THE 0.5 INCH DIAMETER PIPE INTO THE GROUND. ROCK MATERIAL MAY BE DISCOLORED FOR A MORE DETAILED DESCRIPTION OF THIS BY WEATHERING AND MAY BE GEOTECHNICAL EXPLORATION METHOD, THE SOMEWHAT WEAKER EXTERNALLY THAN ITS FRESH CONDITION. SLOPE STABILITY REFERENCE GUIDE FOR NATIONAL FORESTS IN THE UNITED STATES, VOLUME I, UNITED STATES DEPARTMENT OF AGRICULTURE, EM-7170-13, AUGUST 1994, P. 317- 321. CPT EXPLORATION: CONE PENETROMETER EXPLORATIONS CONSIST OF PUSHING A PROBE CONE INTO THE EARTH USING THE REACTION OF A 20-TON TRUCK. THE CONE RESISTANCE (QC) AND SLEEVE FRICTION (FS) ARE MEASURED AS THE PROBE WAS PUSHED INTO THE EARTH. THE VALUES OF QC AND FS (IN TSF) ARE NOTED AS THE LOCALIZED INDEX OF SOIL STRENGTH. MODERATELY LESS THAN HALF OF THE ROCK WEATHERED MATERIAL IS DECOMPOSED ANWOR DISINTEGRATED TO SOIL. FRESH OR DISCOLORED ROCK IS PRESENT EITHER AS A CONTINUOUS FRAMEWORK OR AS CORE STONES. HIGHLY MORE THAN HALF OF THE ROCK WEATHERED MATERIAL IS DECOMPOSED AND/OR DISINTEGRATED TO SOIL. FRESH OR DISCOLORED ROCK IS PRESENT EITHER AS DISCONTINUOUS FRAMEWORK OR AS CORE STONE. COMPLETELY ALL ROCK MATERIAL IS DECOMPOSED WEATHERED AND/OR DISINTEGRATED TO SOIL. THE ORIGINAL MASS STRUCTURE IS STILL LARGELY INTACT. RESIDUAL SOIL .' ALL ROCK MATERIAL IS CONVERTED TO SOIL. THE MASS STRUCTURE AND i I MATERIAL FABRIC IS DESTROYED. THERE IS A LARGE CHANGE IN VOLUME, j BUT THE SOIL HAS NOT BEEN As the client of a consulting geotechnical engineer, you should know that site subsurface conditions cause more construction problems than any other factor. ASFEIthe Association of Engineering Firms Practicing in the Geosciences offers the following suggestions and observations to help you manage your risks. A GEOTECHNICAL ENG.NEERING REPORT IS BASED ON A UNIQUE SET OF PROJECT - SPECIFIC FACTORS Your geotechnical engineering report is based on a subsurface exploration plan designed to consider a unique set of project -specific factors. These factors typically include: the general nature of the structure involved, its size, and configuration; the location of the structure on the site; other improvements, such as access roads, parking lots, and underground utilities; and the additional risk created by scope - of -service limitations imposed by the client. To help avoid costly problems, ask your geotechnical engineer to evaluate how factors that change subsequent to the date of the report may affect the report's recommendations. Unless your geotechnical engineer indicates otherwise, do not use your geotechnical engineering report: MOST GEOTECHNICAL FINDINGS ARE PROFESSIONAL JUDGMENTS Site exploration identifies actual subsurface conditions only at those points where samples are taken. The data were extrapolated by your geotechnical engineer who then applied judgment to render an opinion about overall subsurface conditions. The actual interface between materials may be far more gradual or abrupt than your report indicates, Actual conditions in areas not sampled may differ from those predicted in your report. While nothing can be done to prevent such situations. you and your geotechnical engineer can work together to help minimize their impact. Retaining your geotechnical engineer to observe construction can be particularly beneficial in this respect. • when the nature of the proposed structure is changed. for example, if an office building will be erected instead of a parking garage, or a refrigerated warehouse will be built instead of an unrefrigerated one; • when the size, elevation. or configuration of the proposed structure is altered; • when the location or orientation of the proposed structure - when there is a change of ownership; or .for application to an adjacent site. Geotechnical engineers cannot accept responsibility for problems that may occur if they are not consulted after factors considered in their report's development have changed. A REPORT'S RECOMMENDATIONS CAN ONLY BE PRELIMINARY The construction recommendations included in your geotechnical engineers report are preliminary, because they must be based on the assumption that conditions revealed through selective exploratory sampling are indicative of actual conditions throughout a site. Because actual subsurface conditions can be discerned only during earthwork, you should retain your geo- technical engineer to observe actual conditions and to finalize recommendations. Only the geotechnical engineer who prepared the report is fully familiar with the background information needed to determine whether or not the report's recommendations are valid and whether or not the contractor is abiding by applicable recommendations. The geotechnical engineer who developed your report cannot assume responsibility or liability for the adequacy of the report's recommendations if another party is retained to observe construction. SUBSURFACE CONDITIONS CAN CHANGE A geotechnical engineering report is based on condi- tions that existed at the time of subsurface exploration. ❑o not base construction decisions on a geotechnical engineering report whose adequacy may have been affected by time. Speak with your geotechnical consult- ant to learn if additional tests are advisable before construction starts. Note, too, that additional tests may be required when subsurface conditions are affected by construction operations at or adjacent to the site, or by natural events such as floods, earthquakes, or ground water fluctuations. Keep your geotechnical consultant apprised of any such events. GEOTECHNICAL SERVICES ARE PERFORMED FOR SPECIFIC PURPOSES AND PERSONS Consulting geotechnical engineers prepare reports to meet the specific needs of specific individuals. A report prepared for a civil engineer may not be adequate for a construction contractor or even another civil engineer. Unless indicated otherwise, your geotechnical engineer prepared your report expressly for you and expressly for purposes you indicated. No one other than you should apply this report for its intended purpose without first conferring with the geotechnical engineer. No parry should apply this report for any purpose other than that originally contemplated without first conferring with the geotechnical engineer. GEOENVIRONMENTAL CONCERNS ARE NOT Your geotechnical engineering report is not likely to relate any findings, conclusions, or recommendations about the potential for hazardous materials existing at the site. The equipment, techniques, and personnel used to perform a geoenvironmental exploration differ substantially from those applied in geotechnical engineering. Contamination can create major risks. If you have no information about the potential for your site being contaminated. you are advised to speak with your geotechnical consultant for information relating to geoenviron mental issues. A GEOTECHNICAL ENGINEERING REPORT IS SUBJECT TO MISINTERPRETATION Costly problems can occur when other design profes- sionals develop their plans based on misinterpretations of a geotechnical engineering report. To help avoid misinterpretations, retain your geotechnical engineer to work with other project design professionals who are affected by the geotechnical report. Have your geotechnical engineer explain report implications to design professionals affected by them. and then review those design professionals' plans and specifications to see how they have incorporated geotechnical factors. Although certain other design professionals may be fam- iliar with geotechnical concerns, none knows 'as much about them as a competent geotechnical engineer. BORING LOGS SHOULD NOT BE SEPARATED FROM THE REPORT Geotechnical engineers develop final boring logs based upon their interpretation of the field logs (assembled by site personnel) and laboratory evaluation of field samples. Geotechnical engineers customarily include only final boring logs in their reports. Final boring logs should not under any circumstances be redrawn for inclusion in architectural or other design drawings. because drafters may commit errors or omissions in the transfer process. Although photographic reproduction eliminates this problem, it does nothing to minimize the possibility of contractors misinterpreting the logs during bid preparation. When this occurs. delays. disputes. and unanticipated costs ara the all -too -frequent result. To minimize the likelihood of boring log misinterpretation, give contractors ready access to the complete geotechnical engineering report prepared or authorized for their use. (If access is provided only to the report prepared for you, you should advise contractors of the report's limitations. assuming that a contractor was not one of the specific persons for whom the report was prepared and that developing construction cost estimates was not one of the specific purposes for which it was prepared. In other words. while a contractor may gain important knowledge from a report prepared for another party, the contractor would be well-advised to discuss the report with your geotechnical engineer and to perform the additional or alternative work that the contractor believes may be needed to obtain the data specifically appropriate for construction cost estimating purposes.) Some clients believe that it is unwise or unnecessary to give contractors access to their geo- technical engineering reports because they hold the mistaken impression that simply disclaiming responsibility for the accuracy of subsurface information always insulates them from attendant liability. Providing the best available information to contractors helps prevent costly construction problems. It also helps reduce the adversarial attitudes that can aggravate problems to disproportionate scale. READ RESPONSIBILITY CLAUSES CLOSELY Because geotechnical engineering is based extensively on judgment and opinion, it is far less exact than other design disciplines. This situation has resulted in wholly unwarranted claims being lodged against geotechnical engineers. To help prevent this problem, geotechnical engineers have developed a number of clauses for use in their contracts, reports, and other documents. Responsibility clauses are not exculpatory clauses designed to transfer geotechnical engineers' liabilities to other parties. Instead, they are definitive clauses that identify where geotechnical engineers' responsibilities begin and end. Their use helps all parties involved recognize their individual responsibilities and take appropriate action. Some of these definitive clauses are likely to appear in your geotechnical engineering report. Read them closely. Your geotechnical engineer will be pleased to give full and frank answers to any questions. RELY ON THE GEOTECHNICAL ENGINEER FOR ADDITIONAL ASSISTANCE Most ASFE-member consulting geotechnical engineering firms are familiar with a variety of techniques and approaches that can be used to help reduce risks for all parties to a construction project, from design through construction. Speak with your geotechnical engineer not only about geotechnical issues, but others as well, to learn about approaches that may be of genuine benefit. You may also wish to obtain certain ASFE publications. Contact a member of ASFE of ASFE for a complimentary directory of ASFE publications. FF,� VYJ 4 8811 Colesville Road/Suite G106/Silver Spring, MD 20910 Telephone:301/565-2733 Facsimile:301/589-2017 Subsurface Explorations Soil Testing Earthwork Monitoring Geotechnology Foundation Engineering Rock Mechanics Earthquake Engineering Geophysics Retaining Wall Design Geostrructural Design Pavement Design Drainage Evaluations Groundwater Studies Environmental Assets Building-Asse-ssment-s WER-ICANGEOSER-VICES.COM Subsurface Explorations Soil Testing Earthwork Monitoring Geotechnology Foundation Engineering Rock Mechanics Earthquake Engineering Geophysics Retaining wall Design Geostrructural Design Pavement Design Drainage Evaluations Groundwater Studies Environmental Assets -Building Assessments -- -- AMERICANGEOSERV [CES.COM 12/16/2019 PRELIMINARY TECHNICAL INFORMATION REPORT for 37325 8T" AVE S FEDERAL WAY SHORT SUBDIVISION Owner/Applicant Eunhee Kim 37325 8th Ave S Federal Way, WA 98003 (818) 321-4243 Report Prepared by Eui Kim Professional Engineer 37325 8th Ave S Federal Way, WA 98003 (818) 321-4243 Report Issue Date December 15, 2019 RECEIVED DEC 17 2019 CITY OF FEDERAL WAY COMMUNI'TY DEVELOPMENT tiu l 5 k/;A-4 � Og WAS,, 53437� a AL Eui Kim, Professional Engineer Graceland Short Subdivision Page 1 of 53 12/16/2019 PRELIMINARY TECHNICAL INFORMATION REPORT 37325 8T" AVE PRELIMINARY PLAT TABLE OF CONTENTS SECTIONI......................................................................................................................4 PROJECTOVERVIEW............................................................................................... 4 PREDEVELOPED SITE CONDITIONS....................................................................... 4 DEVELOPEDSITE CONDITIONS.............................................................................. 4 NATURAL DRAINAGE SYSTEM FUNCTIONS.......................................................... 5 SECTION11.....................................................................................................................6 CONDITIONS AND REQUIREMENTS SUMMARY .................................................... 6 SECTIONIII.................................................................................................................... 8 OFF -SITE ANALYSIS.................................................................................................. 8 TASK 1: DEFINE AND MAP THE STUDY AREA .................................................:...... 8 TASK2: RESOURCE REVIEW................................................................................... 8 TASK3: FIELD INSPECTION..................................................................................... 9 TASK 4: DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS ... 9 TASK 5: MITIGATION OF EXISTING OR POTENTIAL PROBLEMS ......................... 9 SECTIONIV....................................................................................................................9 FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN ...... 9 EXISTING SITE HYDROLOGY (PART A)................................................................... 9 TASK 4.1: Flow Control and Water Quality Design ................................................... 10 4.4 Water Quality....................................................................................................... 11 SECTIONV...................................................................................................................11 CONVEYANCE SYSTEM ANALYSIS AND DESIGN..................................................11 TASK 5.1: CONVEYANCE SYSTEM ANALYSIS AND DESIGN ............................... 11 APPENDIXA................................................................................................................ 33 Rational Runoff Calculation and determining Storm drain Pipe Size ....................... 33 APPENDIXB................................................................................................................ 42 WWHMOutput .................................. .............. __..................................................... 42 Eui Kim Professional Engineer Eui Kim, Professional Engineer Graceland Short Subdivision Page 2 of 53 12/16/2019 List of Figures Figure1A Site Map.........................................................................................................13 Figure1 B the Green/Duwamish River Watershed.......................................................... 14 Figure2 TIR Worksheet ................................................................................. 15 Figure3 Geologic Map.................................................................................................. 20 Figure 4 King County NAP showing Elevation, Environmental Sensitive Area, Flood Inf, Stormwater Service Area, Wetland ................................................... 21 Figure 4.1 FEMA Firm Flood Insurance Rate Map .............................................. 22 Figure 5 Land Slide Hazard Area, Seismic Hazard Area ............................................. 24 Figure 6 Development Area Map.................................................................................. 25 Figure 7 Drainage Basins & Site Characteristic Map ................................................... 26 Table 1 soil Pit analysis and Test . . . ............ ................................................. • • • 27 Eui Kim Professional Engineer Eui Kim, Professional Engineer Graceland Short Subdivision Page 3 of 53 12/16/2019 SECTION 1 PROJECT OVERVIEW The Project is the Short subdivision of the one existing parcel into 4 single-family residential lots per the City of Federal Way (City) subdivision process. Each parcel is zoned RS 35 and sums up to a total site area of 3.547 acres. The Tax Parcel Number is 3221049023. The Project location is 37325 8th Ave S, Federal Way; King County, Washington. The Project will meet the drainage requirements of the 2016 King County Surface Water Design Manual (Manual). The purpose of this Preliminary Technical Information Report (TIR) is to provide the technical information and design analysis required for preparing the drainage design for the proposed 4 lots short subdivision on subject parcel. The City of Federal Way adopted the current 2016 King County Surface Water Design Manual (2016 KCSWDM) for all development within the city. This project will follow the 2016 KCSWDM requirements. The proposed development is 4-lot Short Plat on a rectangular -shaped parcel within the RS35.0 (Single Family Residential) zone. The project site is bordered to south by a residential church adjacent, east by 8th Ave, and north by 373rd Street. The total lot area is approximately 154,487 SF (3.547 acre). PREDEVELOPED SITE CONDITIONS Total existing Site area is approximately 154,487 s.f. (3.547 ac). The total project development area is 154,487 s.f. (3.547 ac) which excludes Road dedicated to the City of Federal Way. The Site contains one single family residences, associated driveways and outbuildings, and landscaping. The Site sits on the hill sloped to a ridge and slopes to the east west. The whole of the site is moderately sloping westerly and easterly and is surrounded by 373th Street S and 8th Ave on the north and east, respectively. Topography indicates that the Site is contained within single distinct Threshold Discharge Areas, TDA A shown on the TDA map on Figure 7. TDA appears to be similar in land use/cover with developed areas of landscaping and home sites along with portions of forested. For the purpose of hydrologic calculations, the entire Site is modeled as till forest. DEVELOPED SITE CONDITIONS The applicant is seeking approval to subdivide 5.41 acres into 4 single—family residential lots with sizes ranging from approximately 35,000 s.f. to 36,600 s.f. All existing improvements located on the Site will be stayed until separate plat construction permit. Impervious surfaces include the 4 residences and their driveways, the proposed roadways dedicated to the City of Federal Way after short -subdivision done by individual owner and the City. Eui Kim, Professional Engineer Graceland Short Subdivision Page 4 of 53 12/16/2019 NATURAL DRAINAGE SYSTEM FUNCTIONS The Site consists of Single Threshold Discharge Areas (TDA) on Figure 7. Runoff from TDA East appears to converge at a low point at the northwest corner of the Site. Field investigation would indicate that this runoff infiltrates and never leaves the Site by the existing side ditch at the 373rd Street; field insitu testing would appear to confirm this observation. Based on the Soil Report, American Geoservices, Septic Feasibility Report, Project No: 0177-WA19 dated September 2019 said: "Soils profile: Medium sands, loamy coarse sands, loamy medium sands, (Soil Type 3) in upper 2.5'-3.0' followed by gravelly to very gravelly coarse sands (Soil Type 1) extending to the maximum explored depth of 8 feet. Groundwater: Not encountered; Soil mottling present within 2.5-3.0 feet of the ground surface. Design Long Term Acceptance Rate (LTAR) or Loading Rate for Residential Effluent Using Gravity or Pressure Distribution: 0.80. J Conclusion: Site is suitable for on -site waste treatment as per the most current King County, WA, On -site Sewage Regulations, provided adequate setbacks are provided for all the components of on -site sewage systems." A review of the soil is attached at King County Health Department approval Letter. In conclusion, all upstream runoff of the Site and can be considered negligible for the scope l of this project due to no foreseen negative impacts being anticipated from the upstream J areas at the ridge of hill. Eui Kim, Professional Engineer Graceland Short Subdivision Page 5 of 53 J 12/16/2019 SECTION II CONDITIONS AND REQUIREMENTS SUMMARY The Project must comply with the following Core and Special Requirements: • C.R. #1 — Discharge at the Natural Location: All Site runoff will infiltrate, no discharge is anticipated in the developed area. Discharging to the natural drainage location at the existing side ditch of 373rd Street helps to prevent adverse impacts to downstream properties caused by developing 3 lots, and to discharge in a manner that does not significantly impact downhill properties or drainage systems. The proposed discharge from the site will mimic the existing drainage conditions. The runoff will be collected and conveyed to the existing gravel ditch which will be utilized to infiltrate the stormwater into the soils or new storm drain pipe installed by widening of road dedicated. • C.R. #2 — Offsite Analysis: An offsite analysis is included in Section III. The Analysis describes the Site's runoff pattern in detail. • C.R. #3 — Flow Control: Flow control will be provided in order to protect downstream properties and resources from increases in peak, duration and volume of runoff generated by new development. The gravel trench/or storm drainage pipe system will provide flow control for the project site after road dedicated to the City constructed. • C.R. #4 — Conveyance System: New pipe systems and ditches/channels are required to be designed with sufficient capacity to convey and contain (at minimum) the 25-year peak flow, assuming developed conditions for onsite tributary areas and existing conditions for any offsite tributary areas. All conveyance system elements for the proposed project will be analyzed, designed, and constructed to provide a minimum levelooe of protection against overtopping, flooding, erosion, and structural failure. The proposed conveyance system consists of 8" pipe system which will convey 0040F stormwater from the impervious areas to the on -site infiltration trench but this conveyance system will be a part of road expansion of the road dedicated to the City. Wet" Ito, • C.R. #5 — Erosion and Sediment Control: The Project do not needs to provide any minimum ESC measures. But in order to help minimize the erosion and transport of sediment, several erosion control measures as detailed in the King County Erosion and Sediment Control (ESC) Standards adopted as Appendix D of the 2016 KCSWM will be utilized. 0 • C.R. #6 — Maintenance and Operations: Maintenance of the proposed storm drainage facilities will be the responsibility of the City/County. An Operation and Maintenance Eui Kim, Professional Engineer Graceland Short Subdivision Page 6 of 53 12/16/2019 Manual will be included in Section X at the time of construction plan preparation. All privately maintained drainage facilities shall be maintained as specified in Appendix A of the 2016 KCSWM. A copy of the Operation and Maintenance Manual shall be retained on site and will be transferred with property to new owner. • C.R. #7 — Financial Guarantees and Liability: Prior to commencing construction of each site development, the Applicant must post a drainage facilities restoration and Site stabilization financial guarantee. For any constructed or modified drainage facilities to be maintained and operated by the City, the Applicant must: 1) Post a drainage defect and maintenance financial guarantee for a period of two years, and 2) Maintain the drainage facilities during the two-year period following posting of the drainage defect and maintenance financial guarantee. • C.R. #8 — Water Quality: It is exemption per Condition 1: Surface Area Exemption per less than 5,000 sf of new plus replaced PGIS ( pollution -generating impervious surface) and less than 3/ acre of new PGIS that is not fully dispersed will be added. 00 • C.R. #9 — Flow Control BMP's: Any impervious surface served by an infiltration facility designed in accordance with the flow control facility requirement (Section 1.2.3.1), the facility implementation requirements (Section 1.2.3.2), and the design criteria for infiltration facilities (Section 5.2) is exempt from the flow control BMPs requirement. (Manual, Section 1.2.9.1(A)) • S.R. #1 — Other Adopted Area -Specific Requirements: Not applicable for this Project. • S.R. #2 — Flood plain/Floodway Delineation: The Project parcel is not within a 100year floodplain defined by any of FEMA's floodplain insurance rate maps. No other specific data exists establishing the base (100-year) flood elevation through the Site. • S.R. #3 — Flood Protection Facilities: Not applicable for this Project. J• S.R. #4 — Source Control: Not applicable for this Project. • S.R. #5 — Oil Control: Not applicable for this Project. 11 I I 1 j Eui Kim, Professional Engineer Graceland Short Subdivision `yj Page 7 of 53 12/16/2019 SECTION III OFF -SITE ANALYSIS An offsite Level One Downstream Analysis was prepared by Eui Kim Professional Engineer and is included in this Section. TASK 1: DEFINE AND MAP THE STUDY AREA This Offsite Analysis was prepared in accordance with Core Requirement #2, Section 1.2.2 of the 2016 King County Surface Water Design Manual (Manual). The Site is located at 37325 8th Ave S Federal Way, WA. See Figures 2 through 7 for maps of the study area. TASK 2: RESOURCE REVIEW • Adopted Basin Plans: None at this time. j Floodplain/Floodway Map and FEMA: No floodplains exist on site, See Figure 4. Other Offsite Analysis Reports: See Figure 1 B The Green/Duwamish River Watershed Map • Sensitive Areas King county iMaps: no Sensitive Area, See Figures 4. • Figure 4 Streams and 100-Year Floodplains and Floodway: There are no floodplains onsite. A stream is located within 1 mile of the site along the downstream path. • Figure 4 Wetlands: King County has not identified any wetlands in the immediate vicinity j of the project site, however one wetland is found within one mile over the highway of the J site. • Figure 4 Erosion Hazard: There are no mapped Erosion Hazard Areas onsite,. _ Figure 4 Landslide Hazard: There is one area mapped • Figure 4 Seismic Hazard: There are no mapped Seismic Hazard Areas on the project site. • Road Drainage Problems: None noted. USDA King County Soils Survey: See Figure 3. • Wetlands Inventory: Vol. 1 East (1990) — The wetland inventory revealed no additional wetlands within the downstream path. • Migrating River Studies: None are applicable to the site. • Washington State Department of Ecology's latest published Clean Water Act Section 303d list of polluted waters: None listed along the % mile downstream path. • King County Designated Water Quality Problems: None at this time. • Adopted Stormwater Compliance Plans: None applicable to this site. • Basin Reconnaissance Summary Reports: No reports available for this area. Eui Kim, Professional Engineer Graceland Short Subdivision Page 8 of 53 12/16/2019 TASK 3: FIELD INSPECTION UPSTREAM TRIBUTARY AREA In evaluating the upstream area, we reviewed the King County iMap, a field topographic survey, and area topography from King County iMap. Negligible runoff may enter from 8th Ave S but will not impact the project given the proposed road and drainage improvements. Otherwise, runoff does not enter the Site from any other direction. GENERAL ONSITE AND OFFSITE DRAINAGE DESCRIPTION Runoff from TDA on Figure 7 appears to converge at low point at the northwest corner with no apparent outlet. Field observation of the vegetation in this area indicates that water does not pond and would therefore appear to infiltrate. This observation was confirmed with in -situ infiltration testing that confirmed that runoff does indeed infiltrate. Should the soil ever saturate and the area overflow, runoff would head west side ditch near 373rd Street. Runoff from TDA sheet flows to the west through ditch at 373rd Street to the stream at the lower area. TASK 4: DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS DRAINAGE SYSTEM DESCRIPTION The downstream analysis is further illustrated and detailed in Figure 7, the Downstream Map. The drainage area is located within the Green/Duwamish River Watershed area. TASK 5: MITIGATION OF EXISTING OR POTENTIAL PROBLEMS The project should not create any problems as specified in Section 1.2.2.1 of the Manual and therefore is not required to provide Drainage Problem Impact Mitigation subject to the requirements of Section 1.2.2.2. SECTION IV FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN EXISTING SITE HYDROLOGY (PART A) WWHM was used to model the peak runoff from the Site. Per Table 3.2.2.b of the Manual the soil type is modeled as "Type C" for the gravelly silty sandy SM/GM classification as shown in Table 1 on page 26, Soils Classification. The entire Site is modeled as "Pasture." Results of the WWHM analysis are included in this section. Because the project is proposing full infiltration, the entire Site was modeled as a single basin, despite the single threshold discharge areas in the predeveloped condition. Eui Kim, Professional Engineer Graceland Short Subdivision Page 9 of 53 12/16/2019 TASK 4.1: Flow Control and Water Quality Design This Offsite Analysis was prepared in accordance with Core Requirement #2, Section 1.2.2 of the 2016 King County Surface Water Design Manual (Manual). The Site is located at 37325 8th Ave S Federal Way, WA. The proposed analysis parameters are as follows: WWHM Methodology Seatac Rainfall region with a precipitation factor of 1.0 Type "C" soil is used in WWHM model. Total area = 154,487 SF = 3.546 acre Approximately 4,500 s.f. of on -site hard surface area will be added. 4.2 Existing Basin Summary Total pervious = 3.547 acres (154,487 so Existing road = 0.0376 acres (1.600 sfl Total area Included in the Analysis = 3.547 acres (154,487 so Refer to the Existing Basin Map attached later in this section for more details. 4.3 Developed Basin Summary Total pervious: = 3.547 acres (154,487 so Roof = 0.11 acres (4,800 so Existing Road = 0.0376 acres (1,600 so Driveway and walkway incl road dedicated to the City = 0.295 acres 12.858 s Total area = 3.547 acres (154,487 so On Site Impervious Areas = 0.435 acre (18,958 sf) = 12.3% of total area Refer to the Developed Basin Map attached later in this section for more details. The infiltration trench has been sized 350' (L) X 3.1' (W) X 3' (D),at the side of 373rd Street collecting all storm drainage from the project site. Eui Kim, Professional Engineer Graceland Short Subdivision Page 10 of 53 12/16/2019 4.4 Water Quality Water quality is exempt because the total PGIS is only 4,500 sf, and is less than the threshold limit of 5,000 sf. SECTION V CONVEYANCE SYSTEM ANALYSIS AND DESIGN TASK 5.1: CONVEYANCE SYSTEM ANALYSIS AND DESIGN The conveyance system mainly consists of 8" PVC at 8% min Storm Drainage for the site. The peak runoff calculation using Rational Method are as follow: Storm Drain Runoff From KSCS D M Figure 3.2.1.A-D aR bR Tc 'Pr iiR IR 2-yr 1.58 0.58 0.73 1.6 1.90 3.03 10-yr 2.44 0.64 0.73 2.4 2.98 7.16 25-yr 2.66 0.65 0.73 2.7 3.26 8.81 100-yr 2.61 0.63 0.73 3.2 3.18 10.18 IR=(Pr)(iR) (Peak Rainfalll Intensity) iR=(aR)(Tc)^-(bR) (Unit Peak Rainfall Intensity Factor) Storm Drainage System C Roof Area (A) lR for Area: Peak Runoff Q25 = 3.01 cfs 0.2 3.547 2.248 Conveyance Pipe Analysis: See Appendix A Eui Kim, Professional Engineer Graceland Short Subdivision Page 11 of 53 12/16/2019 Storm drain SIZE (IN) SLOPE MANNING 25-yr Peak pipe (FT/FT) COEFFICEN Flow Rate for Tightline T, n Roofs Area THREE 8" 8" 0.1 0.012 30fps CIP PIPE Using 8" CIP Pipe for each storm drain trench, the capacity is sufficient to handle 25 year peak flow rate. We strongly recommend the City to consider adopt this size as it is ultimately protection of the site from flooding during 25-year storm event Eui Kim, Professional Engineer Graceland Short Subdivision Page 12 of 53 12/16/2019 Dash Point © 17 G' CR Auburn 108 59 78 Corhmencement Bay 509 Algona 37325 8th Avenue South 161J =r.r; � Pacific Fife Heights Tacoma Ed ewood(167 ,ITR. L {)SITE�OCATION onrr: "°U _01P Emerald Queen Casino _ LeMay - America's O © Fife Car Museum 167 v (D '—FERENCE: Eui Kim} ofess OGLE MAPS llVy _r--c TnonnoAouit' neAoc FIGURE 1A 1=ni0 f�,MEkICAN GEOSERi�'ICES FIGURE 1: SjaTEnLQeASR@N MAP ' "IM2?G•11_'I Page 13 of 53 12/16/2019 % • J + N • 41 SVI i L d a d VI _ �t7v�i J a 3 IA L G! N d N L v � FEM m � a u°o `l9�'L. v• @'� � v v � v > z R _ ra W pq Ny = c3' f ' i a`-c 3 `hIIA L s o FA ^'✓ hj4 fl O H a y m° u w .. � c� i ,► z C �0 l0 Puget$OAn m° m O N C V E 0 O L _ •5 m m ! - .w(Z . C Gl N fir/�jM . 7 •� `- m m > m Q � i 0 jT3 .f-• - m E: O FIGURE 1 Q Eui Kim, Professional Engineer Graceland Short Subdivision Page 14 of 53 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 12/16/2019 TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Project Owner Eunhee Kim Phone 818-321-4243 I Address 'A7.3.25-8-.h _ -P -1;_ Federal Way, WA 98003 Project Engineer Eu_i Kir , PE Company Phone 818-321-4243 Part 3 TYPE OF PERMIT APPLICATION ® Landuse Services Subdivison / � / UPD ❑ Building Services M/F / Commerical / SFR ❑ Clearing and Grading ❑ Right -of -Way Use ❑ Other Part 5 PLAN AND REPORT INFORMATION Technical Information Report Type of Drainage Review ®/ Targeted i (circle): Large Site Date (include revision dates): Date of Final: Part 2 PROJECT LOCATION AND DESCRIPTION Project Name g,rgrgeland�Short DDES Permit # Location Township Range Section Site Address 37325 8th Ave S Part 4 OTHER REVIEWS AND PERMITS ❑ DFW HPA ❑ COE 404 ❑ DOE Dam Safety ❑ FEMA Floodplain ❑ COE Wetlands L Other ❑ Shoreline Management ❑ Structural Rockery/Vault/ ❑ ESA Section 7 Site Improvement Plan (Engr. Plans) Type (circle one): Full / Modified / S rM ite Date (include revision dates): Date of Final: I F rt 6 ADJUSTMENT APPROVALS 1 Type (circle one): Standard / Complex / Preapplication / Experimental / Blanket Description: (include conditions in TIR Section 2) Date of Approval_ _ 2005 Surface Water Design Manual 111105 Eui Kim, Professional Engineer 1 Graceland Short Subdivision Page 15 of 53 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 12/16/2019 TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes /® Start Date: Completion Date: Part8 SITE COMMUNITY AND DRAINAGE BASIN Community Plan : Special District Overlays: Drainage Basin: Stormwater Requirements: Describe: Part 9 ONSITE AND ADJACENT SENSITIVE AREAS ❑ River/Stream ❑ Steep Slope _ ❑ Lake _ ❑ Erosion Hazard ❑ Wetlands ❑ Landslide Hazard _ ❑ Closed Depression ❑ Coal Mine Hazard, ❑ Floodplain ❑ Seismic Hazard __ ® Other No Sensitive area ❑ Habitat Protection _ Li Part 10 SOILS Soil Type Slopes gravelly silty Sand SM/GM 6-90 i ❑ High Groundwater Table (within 5 feet) J❑ Other ❑ Additional Sheets Attached J ❑ Sole Source Aquifer ❑ SeeoS/Snrinas troslon rotennal NO potential 2005 Surface Water Design Manual 111105 Eui Kim, Professional Engineer 2 Graceland Short Subdivision Page 16 of 53 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 12/16/2019 TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Fpartll DRAINAGE DESIGN LIMITATIONS F.- REFERENCE ❑ Core 2 — Offsite Analysis ❑ Sensitive/Critical Areas ❑ SEPA ❑ Other ® Simplified Drainage ❑ Additional Sheets Attached LIMITATION / SITE CONSTRAINT Reuirement Part 12 TIR SUMMARY SHEET(provide one TIR Summary Sheet per Threshold Dischar a Area) Threshold Discharge Area: name or description) Core Requirements (all 8 apply) Discharge at Natural Location Number of Natural Discharge Locations: 1EA Offsite Analysis Level: 1 / 2 / 3 dated: Flow Control Level: 1 / 2 / 3 or Exemption Number Incl. facility summary sheet Small Site BMPs Conveyance System Spill containment located at: Erosion and Sediment Control ESC Site Supervisor: N/A Contact Phone: After Hours Phone: Maintenance and Operation Responsibility: Private Q21ic If Private, Maintenance Loci Required: Y 1 No Financial Guarantees and Provided: Ye No LiabiN Water Quality Type: Basi Sens. Lake 1 Enhanced Basicm / Bog (include facility summary sheet) or Exemption No. Landscape Management Plan: Ye ! No Special Requirements as applicable) Area Specific Drainage Type: CDA / SDO / MDP / BP / LMP / Shared Fac. / None Requirements Name: Floodplain/Floodway Delineation Type: Major / Minor / Exemptio 1 None 100-year Base Flood Elevation (or range): Datum: Flood Protection Facilities Describe: Source Control Describe landuse: (comm./industrial landuse) Describe any structural controls: 2005 Surface Water Design Manual 111105 Eui Kim, Professional Engineer 3 Graceland Short Subdivision Page 17 of 53 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 12/16/2019 TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Oil Control High -use Site: Yes !o Treatment BMP: Maintenance Agreement: Yes CED with whom? Other Drains a Structures Describe: Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION AFTER CONSTRUCTION ❑ Clearing Limits ❑ Stabilize Exposed Surfaces ❑ Cover Measures ❑ Remove and Restore Temporary ESC Facilities ❑ Perimeter Protection ❑ Clean and Remove All Silt and Debris Ensure ❑ Traffic Area Stabilization Operation of Permanent Facilities ❑ Sediment Retention ❑ Flag Limits of SAO and open space preservation areas ❑ Surface Water Control ❑ Other ❑ Dust Control ❑ Construction Sequence Part 14 STORMWATER FACILITY DESCRIPTIONS Flow Control Type/Description I ❑ Detention ® Infiltration NATURAL SLOPE ❑ Regional Facility ❑ Shared Facility ❑ Small Site BMPs ❑ Other Note: Include F Water Quali ❑ Biofiltration ❑ Wetpool ❑ Media Filtration ❑ Oil Control ❑ Spill Control Small Site BMPs ❑ Other and J 2005 Surface Water Design Manual 111105 4 J Graceland Short Subdivision Eui Kim, Professional Engineer Page 18 of 53 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 12/16/2019 TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 15 EASEMENTS/TRACTS Part 16 STRUCTURAL ANALYSIS ❑ Drainage Easement I ❑ Cast in Place Vault ❑ Access Easement ❑ Retaining Wall ® Native Growth Protection Covenant ❑ Rockery > 4' High ❑ Tract ❑ Structural on Steep Slope ❑ Other ❑ Other Part 17 SIGNATURE OF PROFESSIONAL ENGINEER 1, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. To the best of my knowledge the infgpmation provided here is accurate. 12/16/2019 ►, -3�437 -A CIVIL AND STRUCTURAL 2005 Surface Water Design Manual 1/1/05 Eui Kim, Professional Engineer 5 Graceland Short Subdivision Page 19 of 53 Q r t i Qw s flu 0: vrf s Q08 ... Qls LEGEND QW Iee 0toutact deposits 0,,d_J Recessional Iaenstri-ne deposits _1 J _J _1 J i N REFERENCE �Euu �X���m. r'l�r BACAN GEOSERVICES 'S.GEOLOGIG'SUK &Ss FIGURE 33G WC 16of53 12/16/2019 ti King County MAP, Elevation, environmental sensitive area, flood info, landslides, stormwater services, wetland n a A a p R 4 d FIGURE 4 Property Layers Parcels Elevation Contours index contours - 100 foot I con. - 5 foot (below 1000 feet) and 11 fffjjjj Emrironmentalty Sensitive Areas Potential landslide hazard areas (2016, se i emanation—>) Erosion hazard (1990 SAO) 1� Seismic hazard (1990 SAO) coal mine hazard (1990 SAO) PHI Stream (1990 SAO) r class 1 — class 2 perennial '-- days a salmorld — class 3 • unclassified Wetland (19%5AO) 11 Sensitive area notice on title f 'f Flooding info Inver faO6tles = leiee = pump station = revetment A��� = cwtstructed channel Eui Kim, Professional Engineer Graceland Short Subdivision Page 21 of 53 SOUTH R Brook lake x a, S I LL_! �i i I ZONE 1 KING COUNTY Mud UNINCORPORATED AREAS Lake t�530D71 y gyp` J COURT � z v ZONE r VE ST z s� TZIN ,oT ,TTTi AVENUE AVENUE AVENUE SOUTH SOUTH SOUTH FLOOD HAZARDS SHOWN WiTFiIN CRY OF MILTON ARE FOR INFORMATION ONLY. FOR FLOOD INSURANCE PURPOSES REFER TO SEPARATELY PUBLISHED FLOOD INSURANCE RATE MAP. 12/16/2019 APPROXIMATE SCALE IN FEET 2000 0 2000 ` RA1 o%t F10110 WDRAHCE PRI)CRAN I FIRM ROOD INSINIANCE HATE MAP RING COUNTY, WASENGTON AND INCORPORATED AREAS MEL IM IF 1725 is aM.a. mm-x roc ravels Nor PwNwc" COANWY tv�rn PILL SUM ap ycar.am as = :: i Fauta Eme>:argr Mmwectaet,t Alt M a m dla Y cav/ ct a pdam d me ]O]MT m2w—d §Md asap it Yco ur y F.mrc A.licv. Ift mm dew n* r EM ehscga nenAmec>� aAicn mar hme aeon made auxearxict en tfte aixs axc me Mask Fw the IWl t n p'FAX Sed-me chcen e6wA FlaO ak+d Flood Atacrars! Flout diap SOue at ww,c rwse.feno•y� Eui Kim, Professional Engineer Graceland Short Subdivision Page 22 of 53 et - .r � �''- 3.'�'�`�' ���j firer •W��� It If. , Y 11B ps Mzxr tWr 1 7r, n..-, v - t h� - 12/16/2019 ` 37325 BEE Ave 5, Federal Way, WA. ,+rScarps and Flanks Deep Susceptibility y Moderate High ' �Areas Not Analyzed � No landslide inventory available No landslide susceptibility ' available Fans r t ❑ High (23-30) X _,..,,n ,, t:I • �' i i Moderate (5--22) Low(1-7) Shallow $uscepUbility V FIGURE 5 Eui Kim, Professional Engineer Graceland Short Subdivision Page 24 of 53 12/16/2019 AL ary or Federal Way GRA.CELAND SHORT PLAT NO. — SU CITY OF FID) RAL WAY KNG COUNTY, WASHINGTON VERiY.AL �ITLR.I v�anwocre,..rcw er..m.a nr: m.w o..�x1v ww.m*mr.r..rw.f az.w,v.. i LEGEND .`-L� F�xroRwr err. o rw am. ms..w_,m�ras -_rw rowarrwe sneasw snem r+x ram RECORDING NO IVOL' /PAGE SCALE. m P-MON OF gF 1/a or rE 1/n, 5 32 T. 21N �.4 E I k+ •' GRACE.AND SHORT PLAT GOaDiVI.iN MY OF FEDERAL WAY, WASH NGTON D- By O-TME " „, LA-- ] SLIRVEFDIG. Uqr— J. GOODMAN 10/O7 /18 15--" - sssx A�w,M 6'.is�w>•r>w ,i o.m. er w.c v�ar t�1''+�� J GDODAIAN 1'=E0' 3 ca 3 Total area of Predevelopment: Lot #1: 3.547 acre Total: 3.547 acre Roof Area: 1680 sf (0.04 acre) Front Road: 150ft x 10 ft=1500 sf (0.034 acre) total area: 3.547 acre Total area of development: Lot #1: 36,608.37 sf 0.84 acre Lot #2: 35,008.22 sf 0.804 acre Lot #3: 35,010.28 sf 0.804 acre Lot #4: 35,002.41 sf 0.804 Total: 141,629.28 sf, 3.252 Acre New Road dedicated to the city: 0.295 acres Roof : 2,000 sf x 4 units=8000sf (0.18 acre) FIGURE 6 1 total area: 3.547 acre Eui Kim, Professional Engineer Graceland Short Subdivision Page 25 of 53 I A I DRAINAGE BASINS & SUBBASINS THE EAST 515 FEET OF THE SOUTH i OF THE NORTH i OF THE SOUTHEAST ] OF THE NORTH HEST 7 OP SECT*N 32, SCALE : I"=30'-0" TOWNWP 21 NORTH, RANGE 4 EASY, *,U. EXCEPT THr NORTH 30 FE,fr THEREOF COMOEYED TO KING COUNTY FOR ROM PUI41 }$5 BY DUD RECORDED UNDER AUDITOR'S FILE NO, 2561343 RECORDS OF KING COUNTY. i I 1=c 12/16/2019 TP1 - ----F - I I Depth to I Depth ; USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0'1-6" ' Topsoil Medium sands, Gravelly silty loamy coarse No 6"-30" sand sands, loamy 4 0.6 groundwater (SM/GM) medium to fine table sands Gravelly to Silty sandy 30"-84" very gravelly gravel (GM) sands Gravelly to Cemented very gravelly 84"-96" silty sandy sands, gravel (GM) cemented i No 30 3 0.8 groundwater table No 1 Limiting layer groundwater table TP2 Depth USCS Soil Textural Soil I Loading Rate Ground (Inches) Classification 1 Classification Type I (gal/sq.ft./day) water Table 0"-6" Topsoil Medium sands, Gravelly silty loamy coarse 6"-40" sand sands, loamy 4 (SM/GM) medium to fine sands sandy Gravelly to f 40"-847'Silty 40"-84" very gravelly 3 gravel (GM) sands TABLE 1 No 0.6 groundwater table 1 V V 0.8 groundwater table a Depth to Soil Mottling (Inches) 33 Eui Kim, Professional Engineer Graceland Short Subdivision Page 27 of 53 12/16/2019 TP3 - Depth to Depth USCS Soil Textural Soil Loading Rate I Ground Soil (Inches) Classification' Classification Type (gal/sq.ft./day) water Table Mottling Topsoil (Inches) 0"42 Medium sands, ` Gravelly silty I No 8"-40" sand loamy coarse 4 0.6 groundwater (SM/GM) sands, loamy table medium sands 30 Gravelly to No 40"-96" Silty sandy very gravelly 3 0.8 groundwater gravel (GM) sands table TP4 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling (Inches) 0 -8" Topsoil Gravelly silty Medium sands, 8"-36" sand loamy coarse 4 (SM/GM) sands, loamy medium sands Silty sandy Gravelly to 36"-96" gravel (GM) very gravelly 3 sands No 0.6 groundwater table 33 No 0.8 groundwater table Eui Kim, Professional Engineer Graceland Short Subdivision Page 28 of 53 12/16/2019 TP5 Depth to Depth USCS Soil Textural Soil Loading Rate Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling i ' (Inches) �—O--1 2" I Topsoil Medium sands loamy coarse Gravelly silty sands, loamy 12"-36" sand medium sands (SM/GM) Occasional roots and organics Gravelly to Silty sandy 36"-96" very gravelly gravel (GM) sands Depth USCS i (Inches) Classification 0"-1011 — 1 W-36" 36"-72" 72"-96" Gravelly silty sand (SM/GM) Silty sandy gravel (GM) Cemented silty sandy gravel (GM) 1 3 0.8 No groundwater table I No groundwater table W TP6 Depth to ` Soil Textural Soil Loading Rate Ground Soil Classification Type (gal/sq.ft./day) water Table Mottling (Inches) Topsoil Medium sands, loamy coarse sands, loamy 4 medium sands; some clay Gravelly to very gravelly 3 sands Limiting layer Gravelly to very gravelly sands, cemented No 0.6 groundwater table No 36 0.8 groundwater table No I groundwater table Eui Kim, Professional Engineer Graceland Short Subdivision Page 29 of 53 12/16/2019 TP7 Depth to Depth USCS Soil Textural Soil Loading Rate I Ground Soil (Inches) Classification Classification Type (gal/sq.ft./day) water Table Mottling i I (Inches) 0"-12" Topsoil Gravelly silty 12"-36" sand (SM/GM) 36"-96" Silty sandy gravel (GM) Depth USCS (Inches) Classification 12"-36" 36"-96" Medium sands, loamy coarse sands, loamy medium sands, trace roots and organics Gravelly to very gravelly sands 4 No 0.6 groundwater table 30 ,cam � TP8 i Soil Textural Soil Loading Rate Classification Type (gal/sq.ft./day) Medium sands, Gravelly silty loamy coarse sand sands, loamy 4 (SM/GM) medium sands, trace roots and organics Silty sandy Gravelly to gravel (GM) very gravelly 3 sands Topsoil M. No groundwater table - — - 1. Depth to Ground Soil water Table Mottling (Inches) No groundwater table No 0.8 groundwater table 27 Eui Kim, Professional Engineer Graceland Short Subdivision Page 30 of 53 12/16/2019 Depth (Inches) AIM 8"-30" 30"-96" TP9 �^ Depth to USCS Soil Textural Soil Loading Rate Classification Classification Type (gal/sq.ft./day) FILL: Silty gravelly Medium sands, sand, some loamy coarse trash, some sands, loamy organics medium sands (SM) Gravelly to Silty sandy very gravelly gravel (GM) sands Depth�USCS (Inches) Classification I m Ground Soil water Table i Mottling I ' (Inches) Topsoil No groundwater table 36 No 3 0.8 groundwater table TP10 Depth to Soil Textural Soil Loading Rate Ground Soil Classification Type (gal/sq.ft./day) water Table Mottling (Inches) Topsoil Silty gravelly Medium sands, sand with loamy coarse some sands, loamy cobbles medium sands (SM) Silty sand gravel, some Gravelly to cobbles, very gravelly some silty sands cementation noted (GM) 4 1 0.6 W. No groundwater table No groundwater table 48 Eui Kim, Professional Engineer Graceland Short Subdivision Page 31 of 53 12/16/2019 Depth USCS (Inches) Classification i 0„-8" I Silty gravelly sand with 8"-60" some cobbles (SM) Silty sandy grave, some cobbles, 60"-96" minor cementation noted (GM) Depth USCS (Inches) , Classification 0"-12" Silty gravelly sand with 12"-60" some cobbles (SM) Silty sandy gravel, some 60"-96" cobbles, some cementation noted (GM) TP11 Depth to I Soil Textural Soil Loading Rate Ground Soil Classification Type (gal/sq.ft./day) water Table Mottling (Inches) Topsoil Medium sands, No loamy coarse 4 0.8 groundwater sands, loamy table medium sands 50 Gravelly to No very gravelly 3 0.8 groundwater sands table TP12 Depth to Soil Textural Soil Loading Rate Ground Soil Classification Type (gal/sq.ft./day) water Table Mottling (Inches) Topsoil Medium sands, No loamy coarse 4 0.6 groundwater sands, loamy table medium sands 50 Gravelly to No very gravelly 3 0.8 groundwater sands table , Eui Kim, Professional Engineer Graceland Short Subdivision Page 32 of 53 12/16/2019 Ratmonal Runoff Method of Predevell2oment CaILIlation per Kong County surface Water Design ManualA r 4 Area: A1: Area of residential of 1 lots: 3.547 AC Area A2: New Road 0. AC Ar :=.3.547 AC A2 := 0 AC At :=A1 +A2 = 3.547 Descriptive ofFlowpath Segments for Tc L1=3,83ft, 125 ft and 90 ft 9% slope s1= .0.09 meadow kg I= 2.5 L1:= 383 sl k= 0.09 kR := 2.5 Tl:- L 1=81.511 min. 60• (kR- Sl) Tl-:=T1=8.511 Coefficients for the rational Method Equation per Table 3.2.1.13 25 years aR=2.66 bR=0.65 aR:=2.6.6 bR:=0.65 ?25 := aR • Tl-(-b-) = 0.661 Compute: Composite Runoff Coefficient Cc Al: C1 from Table 3.2.1 A (page 3-15) 1 units per 3.54 AC 0.4 DU/GA, C=0.2 Cl :=.0.2 '] APPENDIX A Eui Kim, Professional Engineer Graceland Short Subdivision Created with PTC Mathcad Express. See www.mathcad.com for more informatf'dff9e 33 of 53 12/16/2019 A2: Road, Pavement and roof, C=0.9 (Ci-Ai+C2-A2) — CC At — 0.2 PR Total precipitation at the Site for 24 hour duration storm event for given return frequency per Fig III A through D PR:= 3.4 I25:=PR, i25 =.2.248 Peak Runoff Rate: Q25:=_Q�.I25_�At_-1.59.5 _ Cfs J I I I j I I Eui Kim, Professional Engineer Graceland Short Subdivision Created with PTC Mathcad Express. See www.mathcad.com for more informatff3�e 34 of 53 12/16/2019 Area: Ai: Area of residential of 4 lots: 3.25.2 AC Area A2;: New Road 0._295. AC A1:= 3.252 AC A2 0.295 AC At :=A1 +AZ = 3.547 Descriptive. ofFlowpath Segments for Tc L1 383ft, .125 ft and 90 ft 9% slope s1_= _0.09 meadow kg = 2.5 L1== 383 81:= 0.09 kR = 2.5 T1:= --- 1,-- =8.511 min. 60•(-�R-. S1� Tl- :=T1 =8.511 Coefficients for the rational Method Equation per Table 3.2.1.E 25 years aR=2.66 bR=0.65 JaR:=2.66 bR:=0.65 ias.=a,R,T,(-bn) =0.66I W-1 Compute: Composite Runoff Coefficient Cc Al: C1 from Table 3.2.1 A (page 3-15) 1 units per 35,000 sf 1.25 DU/GA, use 1.5 DU/GA, C=0.33 Ci :=.0.33 Eui Kim, Professional Engineer Graceland Short Subdivision Created with PTC Mathcad Express. See www.mathcad.com for more informatfdff9e35of53 12/16/2019 A2: Road, Pavement and roof, C.=0.9 C2 = 0.9 (Cl •At+C2-A2) — C� := A — 0.377 t PR Total precipitation at the Site for 24 hour duration storm event for given return frequency per Fig 3.2.1 A through D PR := 3.4 125:=PR • i25=.2.248 I Peak Runoff Rate: IQ25 := C,: • I25 • At = 3.01 cfs_ ■ - it • ■- : i ■- E _ -� .i,- � ll■.■ -Ei1 Eui Kim, Professional Engineer Graceland Short Subdivision Created with PTC Mathcad Express. See www.mathcad.com for more informatF&9 e 36 of 53 12/16/2019 SECFION 4.2 PWEsS, OUFFar.1 c, A14D PUMPS FIGURE 4.2.1.F NOMOM4PH FOR SLUING CIRCULAR DRAINS FLOVANG FULL W010 800 .0001 2.0 i+0o Goa .0002 Sod X003 Minimum allowable 400 OOK 0M1 V�aclly .0005 ODE6 (Flowing a 300 O00$ 0002 Full) 120 � -a01 108 .00D3 200 q� .0004 c .002 4.0 84 .0005 78 0 .OD3 .0008 004 aal 50 100 a .005 OD5 a ai z F @ &a —70 48 .01 .000 O CO G0 w V 42 ODt, 7.0 LL; LE33 .00OG z 33 03 .008 CL I-- a a ? qd w CL 27 .010 Q CO9lO LL w 30 U. -020 10.0 x O 21 .08 .10 .03D 4 LU 1S .040 LU 15 .060 12 1 1d 1d $ AMPLE USE 7 24" dia. CMP @ M slope 9% 20.0 g 17cfs Lla 5.4fpsvei (n=QO24) 5 G 4 Values per Mannirds equation f, ( 11.49 ) A19210 S.4+E 33.0 3 Ths table can be converted ti to other "rf vol ues by applying formula: 40.0 Q1 = r12 1 023=3.01 cfs Q2 nl AQ4,2016 4_22 2G16 Starface Wama Design Manual Eui Kim, Professional Engineer Graceland Short Subdivision Created with PTC Mathcad Express. See www.math cad. com for more informati�d es�of5s 12/16/2019 i J 4.2.1 P1Pt_SYST-MS—DU1GNCRITERI4 Maximum Pape Slopes and Velocities Table 4.2.1 _A presents maximum pipe slopes and velocities by pipe material_ TABLE 4.2.1.A MA.X1]NUh1 PIPE SLOPES AND VELOCITIES Pipe Material Pipe Slope above which Pipe Maximum Maximum Anchors Required and Minimum Slope Allowed Velocity at Anchor Spacing Full Flaw CP.iP, Spiral Rib, 20% 30%(3) 30fps PUc, (l) (1 anchor per 100 LF of pipe) GOncrete, CPE, or 10% 20%t-9 30 fps pPM (1 anchor per 50 LF c f pipe) Ductile Ironl2? 20% None None (I anchor per pipe section) Said wall HDPEIP) 20% None None (1 anchor per 100 LF of pipe, cross -slope installations only) Motes ('l These materials are not allowed in landslide hazard areas_ t-7) Butt fused or flanged pipe joints are required; above ground installation is recommended on slopes greater than 40%. A maximum slope of 200% is allowed for these pipe materials with no joints (one section), with structures at each end, and with proper grouting_ Changes in Pipe Size 1. increase or decreases in pipe size are atiowed only at junctions and struct-ures_ E: cepliarzs nzaY be aborted per Section 7.04C of the kCRDCS. 2. When connecting pipes at structures, match any of the following (in descending order of preference)_ crowns, 80% diameters,£ or inverts of pipes. Side lateen -I connecdons-1, 12 inches and smaller, are exempt from this requirement. 3. Drop manholes may be used for cncr-,y dissipation when pipe velocities exceed 10 feet per second. External drop manholes are preferred where maintenance access to the upstream pipe is preserved by use of a tee section. internal drop structures may be approved only if adequate scour protection is provided for the manhole teal€s. Drop structures must be individually engineered to account for design variations, such as foie rates, velocities, scour potential and tipping forces. 4. Downsizing pipes larger than 12 inches may be allowed provided pipe capacity is adequate for dcsicn flows. Note: 77re above criteria do not apply to delcnrion lank.s. Eui Kim, Professional Engineer Graceland Short Subdivision Page 38 of 53 12/16/2019 SECTION 31 RUNOFF COMPUTATION AND ANALYSIS MET11OD5 FIGURE 3.2.1.A 2-YEAR 24-HOUR 11SOPLi]VIALS WESTERN KING COUNTY 2-Year 244Hour Precipitation In inches &W2016 2.05 Ur. 3-16 FIGURE Al 2016 5urG%v wa[er Design Manual Eui Kim, Professional Engineer Graceland Short Subdivision Page 39 of 53 12/16/2019 32_1 RATIONAL METHOD FIGURE 3.2.I.B 10-YEAR 24-1[OUR !&UPLUVfALS 0 7 WESTERN KING COUNTY 1 aYear 24-Hour Precipitation In Inches 2016 SurLICC Wa'a lk::ign Manual 4 :2016 3-] 7 1 3.0 Eui Kim, Professional Engineer Graceland Short Subdivision Page 40 of 53 SECTION32 RUNOFF C'OMFUTATION AND ANALYSIS MEMOS i'IG[iR[]Lti.0 2S.YUR 34MOUR LrJTi-MMS WESTERN KING COUNTY 25-Yew 244lour Predpwon in Indies 6/L52016 }3g 3.4 12/16/2019 321 RATIONAL METHOD �3CIfRC ].2.fA i/0.YEAR Li-iHiVRi5tlPLi1YlA23 WESTERN 1 KING COUNTY 100-Year 24-Hour PredpitiMan W Uich" 2016Sm8reW�DciplM®W 2016SuT V/e@rD®p-- 4.1 fi752016 Eui Kim, Professional Engineer Graceland Short Subdivision Page 41 of 53 12/16/2019 WWHM2012 PROJECT REPORT ,j Eui Kim, Professional Engineer Graceland Short Subdivision Page 42 of 53 12/16/2019 I j j j j j 3imation Subdivision t5 Sth Ave :rsl Way 1.OD0 data Eui Kim, Professional Engineer j Graceland Short Subdivision Page 43 of 53 12/16/2019 General Model Information Project Name: default[4] Site Name: Kim 37325 Site Address: 37325 8th Ave S City: Federal Way Report Date: 12/15/2019 Gage: Seatac Data Start: 1948/10/01 Data End: 2009/09/30 Timestep: 15 Minute Precip Scale: 1.000 Version Date: 2019/09/13 Version: 4.2.17 POC Thresholds defauftlQ<im, Professional Engineer 12/15/2019 4:08:40 PM Graceland Short Subdivisicpnage 2 Page 44 of 53 12/16/2019 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass: No GroundWater: No Pervious Land Use acre C, Pasture, Mod 3.546 Pervious Total 3.546 Impervious Land Use acre ROADS FLAT 0.04 ROOF TOPS FLAT 0.04 Impervious Total 0.08 Basin Total 3.626 Element Flows To: Surface Interflow Groundwater defauft[4)<im, Professional Engineer 12/15/2019 4:08:40 PM Graceland Short Subdivisicpnage 3 Page 45 of 53 12/16/2019 Mitigated Land Use Basin 1 Bypass: No GroundWater: No Pervious Land Use acre C, Pasture, Mod 3.252 Pervious Total 3.252 Impervious Land Use acre ROADS MOD 0.295 ROOF TOPS FLAT 0.11 Impervious Total 0.405 Basin Total 3.657 Element Flows To-. Surface Interflow Groundwater defauft[4)<im, Professional Engineer 12/15/2019 4:08:40 PM Graceland Short Subdivisicpnage 4 Page 46 of 53 12/16/2019 Appendix Predeveloped Schematic defauR[Q<im, Professional Engineer 12/15/2019 4:08:40 PM Graceland Short Subdivisicpnage 9 Page 47 of 53 12/16/2019 Mitigated Schematic Basin 1 ••. defauft[Q<im, Professional Engineer 12/15/2019 4:08:40 PM Graceland Short SubdivispoAge 10 Page 48 of 53 12/16/2019 Mitigated UCI File RUN GLOBAL WWHM4 model simulation START 1948 10 01 END 2009 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES >*** <File> <Un#> <----------- File Name --------------------------- <-ID-> *** WDM 26 default[4].wdm MESSU 25 Mitdefault[4].MES 27 Mitdefault[4].L61 28 Mitdefault[4].L62 END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 14 IMPLND 2 IMPLND 4 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFOl # - #<---------- Title ----------- >***TRAN PIVL DIG1 FILL PYR DIG2 FIL2 YRND END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><------- Name ------- >NBLKS Unit -systems Printer *** # - # User t-series Engl Metr *** in out *** 14 C, Pasture, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 14 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT -INFO <PLS > ***************** Print -flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 14 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT -INFO PWAT-PARMl <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** defauft[4j<im, Professional Engineer 12/15/2019 4:08:41 PM Graceland Short Subdivi&ge 12 Page 49 of 53 12/16/2019 14 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY 14 0 4.5 0.06 400 0.1 0.5 END PWAT-PARM2 _ PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP 14 0 0 2 2 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 14 0.15 0.4 0.3 6 0.5 0.4 END PWAT-PARM4 PWAT-STATEl <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS 14 0 0 0 0 2.5 1 END PWAT-STATEl END PERLND IMPLND GEN-INFO <PLS ><------- Name ------- > Unit -systems Printer *** # - # User t-series Engl Metr *** in out *** 2 ROADS/MOD 1 1 1 27 0 4 ROOF TOPS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 0 0 1 0 0 0 4 0 0 1 0 0 0 END ACTIVITY PRINT -INFO <ILS > ******** Print -flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 2 0 0 4 0 0 0 1 9 4 0 0 4 0 0 0 1 9 END PRINT -INFO IWAT-PARMl <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 2 0 0 0 0 0 4 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 2 400 0.05 0.1 0.08 4 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN AGWRC 0.996 AGWETP 0 GWVS 0 I defauft[4j<im, Professional Engineer 12/15/2019 4:08:41 PM Graceland Short SubdivisQ)Age 13 Page 50 of 53 12/16/2019 2 0 0 4 0 0 END IWAT-PARM3 IWAT-STATEl <PLS > *** Initial conditions at start of simulation �} # - # *** RETS SURS I! 2 0 0 4 0 0 END IWAT-STATEl .� END IMPLND III SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** ******Routing****** -� END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** wl <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** II END NETWORK -. RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** >< --- > User T-series En 1 Metr LKFG *** in out *** 1 END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** END ACTIVITY J PRINT -INFO <PLS > ***************** Print -flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* END PRINT -INFO HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC Al A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each J FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** END HYDR-PARMl HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------ ><-------- ><-------- ><-------- ><-------- ><-------- ><-------- > *** END HYDR-PARM2 J HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------ ><-------- > <--- ><--- ><--- ><--- >< --- > *** <--- ><--- ><--- ><--- >< --- > END HYDR-INIT END RCHRES SPEC -ACTIONS END SPEC -ACTIONS FTABLES j defaufij4)<im, Professional Engineer 12/15/2019 4:08:41 PM Graceland Short SubdivisFcAge 14 Page 51 of 53 12/16/2019 END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** END EXT TARGETS MASS -LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** END MASS -LINK END RUN defauR[Q<im, Professional Engineer 12/15/2019 4:08:41 PM Graceland Short SubdivispcAge 15 Page 52 of 53 12/16/2019 Disclaimer Legal Notice This program and accompanying documentation are provided 'as -is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by: Clear Creek Solutions, Inc. 2005-2019; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1(866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com defauftJ41<im, Professional Engineer 12/15/2019 4:08:41 PM Graceland Short Subdivispo;�ge 18 Page 53 of 53