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HomeMy WebLinkAboutPermit D98-0318 - RAL DEVELOPMENT (PURGED)d98-0318 ral development Purged December, 2001 according to Public Records Retention Schedule and Destruction Authorization dated August 3,2000. Disposition Authority Number S00-14. beve\ 1 men* - CITY OF TUIf"1VILA Permit Center 6300 Southcenter Blvd., Suite 100, Tukwila, WA 98188 (206) 431-3670 Project Numbers;. Permit Number: Application and plans must be complete in order to be accepted for plan review. Applications will not be accepted through the mail or facsimile. Project Name/Tenant: Pe) 7 TE k \I 4104 KS A c cl (rionJ Value of Co truction: Z/'i 068 Site Address: City State/Zip: IJo xY 6 l r Aii.nl, So, rule. aJ11.-fri UMi Tax Parcel Nu ber: 697 Rol0 eo-S�/ Property Owner: f R A L. ))EUCLoPMENT- (J6AI rUkE CO.AOb"a LW Phonp: 14-0iR3 EDIT/0'20 Street Address: City State/ ip: lLlo1UAil Wi (-iLAIIPIn/ ALuc(t tkaff204 lssfrita 4 Fax #: row /iosTSR) ,UM Contractor: 96'oa,7 RL 141 L 0EvEcl,>°MiNr Phone: Street Address: City State/Zip: Fax #: Architect: 0ESIG.4s Li AlLimiTE-ll Phone: a06-S'7a-ASeo Fax #: Street Address: City State/Zip: I96/3-8/sr- Au, S, SIa1TE F, 1E1T &11, 98a3� , Engineer: 7-E 1 GLEE G R FP k EA/ &IAIEF...EkS Phone: Li26%5.57- (131,;.47,P Fax #: rvM1, i Ai 26- -c.c.s'7- -134 Street Address: City State/Zip: aa5'a s' Sr != , 64I a . /9Li cE &, z rpava _..rssAOt AA Cont ct Person: 9 Ada 7 f. o6 s roL2I' 'phone: ao6-679- 7,240 Fax #: Street Addre City State/Zip: P, p, iox a74' i PEntTn� W19,S4 , 98o 6 Description of work to be done: CVAI S FA u e- r' 44 it/E) I-!o PY) E Type of work: 3 New Single -Family Residence ❑ Addition - Single -Family Residence ❑ Interior Remodel- Single -Family Residence ❑ Residential Accessory Structure* ❑ Remodel/Addition to Accessory Structure ❑ Garage(s) ❑ Deck(s) - Covered & Uncovered ❑ Residential Reroof Is this site served by: 21 Sewer ❑ Septic (King County Health Dept. approval required - 296-4722) Existing Square Footage for Structure: sq. ft. Dwelling sq. ft. Covered Deck(s) sq. ft. Garage/Carport sq. ft. Accessory Structure(s) sq. ft. Uncovered Deck Proposed New Square Footage: a9 344I sq. ft. Dwelling sq. ft. Covered Deck(s) 1-1$ 4 sq, ft. Garage/Carport () sq. ft. Accessory Structure(s) / 73 sq. ft. Uncovered Deck Floor Area Ratio: (total floor area of all structures divided by the area of the lot) *For an Accessory dwelling, provide the following: Lot area Floor area of principal dwelling Floor area of accessory dwelling * Provide documentation that shows the principal owner lives in one of the dwellings as his or her primary residence. APPLICANT REQUEST FOR PUBLIC WORKS SITE/CIVIL PLAN REVIEW :OF THE FOLLOWIN (Additional reviews shall be determinedby. the Public. Works;Department)..:' ❑ Channelization/Striping ❑ Curb cut/Access/Sidewalk ❑ Fire Loop/Hydrant (main to vault)#: Size(s): ❑ Flood Control Zone Hauling ❑ Land Altering: 0 Cut cubic yds. 0 Fill cubic yds. ❑ Moving an Oversized Loa Start Time: End Time: ® Sanitary Side Sewer #: Xi Storm Drainage 21 0 Water Meter /Permanent If Size(s): VII 1t ❑ 'Street Use ElSewer Main Extension ❑ Water Main Extension 0 Private 0 Private gal 0 Public 0 Public Schedule: Date application acted: Date application expires: App ion taken by: (initials) PLEASE SIGN BACK OF APPLICATION FORM SI'PERMIT.DOC 2/13/97 Water Meter Temp # Size(s): Est. quantity: El Miscellaneous Value of Construction - In all cases, a value of constructioryamount should be entered by the applicant. This figure will be re- viewed and is subject to possible revision by the Permit Center to comply with current fee schedules. Expiration of Plan Review - Applications for which no permit is issued within 180 days following the date of application shall ex- pire by limitation. The building official may extend the time for action by the applicant for a period not exceeding 180 days upon written request by the applicant as defined in Section 107.4 of the Uniform Building Code (current edition). No application shall be extended more than once. ALL SINGLE-FAMILY RESIDENTI A L PERMIT APPLICATIONS MUST BE _ BMITTED WITH THE FOSLOW4NG: ➢ DRAA1�NGS PRlf B REGISTERED ARCHITECT OR PRC._.:SSIONAL ENGINEER MAY BE R aafileo BY'VE BUILDING OFFICIAL ➢ ALLDRAWINGS SHALL BE AT A LEGIBLE SCALE AND NEATLY DRAWN ➢ BUILDING SITE PLANS AND UTILITY PLANS ARE TO BE COMBINED N/A SUBMITTED ❑ ❑ Copy of recorded Legal Description from King County ❑ ❑ Certificate of water/fire flow availability (Form H-11a). Contact the Public Works Department (206) 433-0179 for servicing district. ❑ ❑ Certificate of sewer availability (Form H-11). Contact the Public Works Department (206) 433- 0179 for servicing district. ❑ ❑ Metro: Residential Sewer Certification (if Tukwila Sewer Distri (Form H-12) ❑ ❑ King County Health Department approval for septic - 296-4722 Four (4) sets of working drawings, which include: ❑ Site Plan (see example Form H-16) 1. Existing fire hydrant location(s). 2. Proposed access road. 3. Driveway location -driveway shall be 10' wide minimum and 20' wide maximum. If driveway is over 150' long, driveway shall be 20' wide and have an approved turnaround (City Ordinance 1741). 4. North arrow and scale. 5. Building setback from property lines. Any proposed or existing easements must be shown on plan. 6. Public Works review requires the following on site plan: driveway location (10' min., 20' max. width), show proposed and existing power, water and sewer lines, existing storm drainage system, downspouts and foundation drains, and where drains tie-in. 7. Parking plan. 8. Lowest building elevation (if in Flood Control Zone). 9. Estimated/proposed topography at 2' intervals and proposed elevation of lowest floor level. 10. Identify location of sensitive areas slopes 20% or greater, wetlands, watercourses and their buffers. 11. Identify location and size of significant trees that are located in sensitive areas and buffers or the shoreline zone. Of those, identify which are to be removed (Title 18, City of Tukwila Zoning Code). 12. Identify location of high water mark of the Green/Duwamish River if site is located within 200' of the high water mark. 13. See Public Works Checklist for detailed site plan information required for Public Works Review (Form }� H-9). ❑ l�J Foundation plan and details ❑ in Floor plan ❑ 71 Roof plan ❑ CZI Building elevations (all views) ❑ Building height CIBuilding cross-section ❑ Structural framing plans and details necessary to completely describe construction ❑ Washington State Energy Code Data (Gas/Electric/Oil/Propane/Heat Pump) Form H-15 available at Permit Center OR Prescriptive Heating System Sizing Chap 9 Form H-6. ❑ ❑ Complete Land Use Applications if not previously submitted (i.e., Reasonable Use Exception, Variance, Shoreline or Tree Permit). ❑ ❑ Attach plans, reports or other documentation required to comply with Sensitive Area Ordinance and other land use or SEPA decisions. ❑ ❑ If dwelling has a septic tank, and a bedroom or bathroom are added, provide written approval from the King County Health Department or the Tukwila Public Works Department prior to submittal of permit application. ❑ ❑ Copy of Washington State Department of Labor and Industries Valid Contractor's License. If not available at the time of application, a copy of this license will be required before the permit is issued, unless the homeowner will be the builder OR submit Form H-4, "Affidavit in Lieu of Contractor Registration". Building Owner/Authorized Agent If the applicant is other than the owner,, registered architect/engineer, or contractor licensed by the State of Washington, a notarized letter from the property owner authorizing the agent to submit this permit application and obtain the permit will be required as part of this submittal. I HEREBY CERTIFY THAT I HAVE READ AND EXAMINED THIS APPLICATION AND KNOW THE SAME TO BE TRUE UNDER PENALTY OF PERJURY BY THE LAWS OF THE STATE OF WASHINGTON, AND 1 AM AUTHORIZED TO APPLY FOR THIS PERMIT. BUILDING O E OR A THORIZED GE T: Signature: K e Date: _ / ",9 9 _ is/ j ad? Phone:ao6_679^ Print name: Rpnl Q�T. k. s.,7.,©L.ZF. it) `F :6e Address: 23yOQ: U r Y'4 0741 F , 98° 6 SFI'ERiv11T.DOC 2/13/97 PLAN REVIEW/ROUTING SLIP ACTIVITY NUMBER: D98-0318 DATE: 9-15-98 PROJECT NAME: RAL DEVELOPMENT XX Original Plan Submittal Response to Incomplete Letter Response to Correction Letter # Revision # After Permit Is Issued DEPARTMENTS: Building Division Public Works • Fire Prevention n Structural Planning Division Permit Coordinator DETERMINATION OF COMPLETENESS: (Tues, Thurs) DUE DATE: 9-22-98 Complete n Comments: Incomplete Not Applicable n TUES/THURS ROUTING: Please Route NI' Routed by Staff n (if routed by staff, make copy to master file and enter into Sierra) REVIEWERS INITIALS: No further Review Required DATE: 7-2z- �1 y APPROVALS OR CORRECTIONS: (ten days) DUE DATE: 10-20-98 Approved ❑ Approved with Conditions n REVIEWERS INITIALS: Not Approved (attach comments)X DATE. CORRECTION DETERMINATION: DUE DATE: Approved ❑ Approved with Conditions ❑ Not Approved (attach comments) ❑ REVIEWERS INITIALS: e DATE: \PK•KOU1 E.DOC Bien DATE: PROJECT: PERMIT NO: PLAN REVIEW PUBLIC WORKS DEPARTMENT COMMENTS December 12, 1999 RAL DEVELOPMENT D98-0318 • Contact Joanna Spencer at (206) 433-0179, if you have any questions regarding the following comments. 1. PW can not proceed with the review until all land use issues are resolved. CITY OF TUK"'ILA Permit Center 6300 Southcenter Blvd., Suite 100, Tukwila, WA 98188 (206) 431-3670 Single -Family Residential Permit Application Application and plans must be complete In order to be accepted for plan review. Applications will not be accepted through the mail or facsimile. Project Name/Tenant: p, rrE P Y 141D/Q KS t4 d el r r/QA/ Value of Co tru tion: Z/'f Site Address: City State/Zip: //okX 1 c - Ati A/. So, yak/v1L14 WA, 1068 Tax Parcel Nu b r: 697 oDto dos' Pro erty Owner: 1 is), A, Li 0 Evg Lo P M EN r 6 tionl ru k g Co, Phon : s � i` D MO , d ob-a 14- o P g2 mcr /ao Street Address: j I City State/zj p: /L4 oA/,&i CCi�.A 1144 ALuci(, gtaaeg i'ssplit I AIN,kM Fax #: (ro^A Po$rER) Contractor: 9Po a 7 RI i91 L D GEL PMEAi r Phone: . Street Address: City State/Zip: Fax #: Architect: DESIGNS /4AILim ra Phone: a06-$7a-as*o Fax #: • Street Address: City State/Zip: 19613-45/sr. 4v. S. Su,i F, k'i N7t )A, 919034 r Engineer: ter✓ 1 r✓LLT c REaK E.ia«1sEits phone: 41a5--ss7 43ro5 Street Address: /� City State/Zip: aoLS'oZ.sS, £. 6ii1L. Y1i1cE sc.,rcaOQ S it/i4 Fax #: W/.454, alas"-S3—?—'-/3k Con ct Person: 9 eda blob sro/2F 'Phone: ac c,-679- 7a40 Street Addre City State/Zip: a, ox a74 I Ravzo#f. a11954 , 9c 4 Fax #: Description of work to be done: c 2W s 7-R u cr 4 i1/&1.4) Po 141 E • Type of work: 3 New Single -Family Residence ❑ Addition - Single -Family Residence ❑ Interior Remodel- Single -Family Residence ❑ Residential Accessory Structure' ❑ Remodel/Addition to Accessory Structure • In Garage(s) ❑ Deck(s) - Covered & Uncovered , ❑ Residential Reroof Is this site served by: Sewer ❑ Septic (King County Health Dept. approval required - 296-4722) Existing Square Footage for Structure: sq. ft. Dwelling sq. ft. Covered Deck(s) sq. ft. Garage/Carport sq. ft. Accessory Structure(s) sq. ft. Uncovered Deck Proposed New Square Footage: o9 t/y I sq. ft. Dwelling sq. ft. Covered Deck(s) 48 4 sq. ft. Garage/Carport 0 sq. ft. Accessory Structure(s) 173 sq. ft. Uncovered Deck Floor Area Ratio: (total floor area of all structures divided by the area of the lot) *For an Accessory dwelling, provide the following: Lot area Floor area of principal dwelling Floor area of accessory dwelling * Provide documentation that shows the principal owner lives in one of the dwellings as his or her primary residence. ( APPLICANTIIEQUEST:FORPUBWC:WORKSISITE/CI1fI4P.WPFTVIEVy'bF'Tt1F{FOL 40341 Additional rev/ews shall tie`determlried by,fh`Publlc?Works:Department): emf , ❑ Channelization/Striping ❑ Curb cut/Access/Sidewalk ❑ Fire Loop/Hydrant (main to vault)#: - Size(s): ❑ Flood Control Zone Hauling ❑ Land Altering: 0 Cut cubic yds. 0 Fill cubic yds. Moving an Oversized Loa Sanitary Side Sewer 11: Storm Drainage Water Meter /Permanent # Water Meter Temp # Miscellaneous Start Time: Street Use Size(s): End Time. ❑ Sewer Main Extension 0 Private 0 Public ❑ Water Main Extension 0 Private 0 Public �/err Size(s): Est. quantity: gal Schedule: Value of Construction - In all cases, a value of constructioryamount should be entered by the applicant. This figure will be re- viewed and is subject to possible revision by the Permit Center to comply with current fee schedules. Expiration of Plan Review - Applications for which no permit Is issued within 180 days following the date of application shall ex- pire by limitation. The building official may extend the time for action by the applicant for a period not exceeding 180 days upon written request by the applicant as defined in Section 107.4 of the Uniform Building Code (current edition). No application shall be extended more than once. Date application accepted: Date applicatlgn expires: Applgon taken by: (initials) PLEASE SIGN BACK OF APPLICATION FORM SFPERMIT.DOC 2/13/97 Kelcie J. Peterson, Permit Coordinator :*KVP,r*"gottVdIW-fAawovovv,,fvww,, CITY OF TUKWILA Id: ACTP140 Keyword: UACT User: 1672 09/28/98 Activity Maintenance - People Processing DEVELOPMENT. PERMIT Permit No: D98-0318 Occupant: RAL DEVELOPMENT Status: PENDING Location: 50 AV S, LOTS 7-8 Notice: FIRE DEPT - PLEASE ASSIGN ADDRESS. BLH. Line Name Relationship License No. Date 1 RAL DEVELOPMENT OCCUPANT 09/16/98 2 RAL DEVELOPMENT & VENTURE CO OWNER 09/16/98 3 BOB STOLZE CONTACT 09/16/98 4 RAL DEVELOPMENT & VENTURE CO CONTRACTOR RALDEVC034JG 09/21/98 Enter Option: C Change a Person Relationship: OWNER y Name: RAL DEVELOPMENT & VENTURE CO y Address: 1420 NW GILMAN BL #2206 ISSAQUAH WA y Zip: 98127 y Phone: 206 244-0122 y Notation: Date: 09/16/98 Press F7=Update Person ESC=Cancel Option 1.4 .09/28/98 CITY OF TUKWILA Id: ACTP140 Keyword: UACT User: 1672 Activity Maintenance - People Processing DEVELOPMENT PERMIT Permit No: D98-0318 Occupant: RAL DEVELOPMENT Status: PENDING Location: 50 AV S, LOTS 7-8 Notice: FIRE DEPT - PLEASE ASSIGN ADDRESS. BLH. Line Name Relationship License No. Date 1 RAL DEVELOPMENT OCCUPANT 09/16/98 2 RAL DEVELOPMENT & VENTURE CO OWNER 09/16/9,8 3 BOB STOLZE CONTACT 09/16/98 4 RAL DEVELOPMENT & VENTURE CO CONTRACTOR RALDEVC034JG 09/21/98 Enter Option: C Press F4 F7=Update. Person Change a Person y Relationship: CONTACT. Name: BOB STOLZE y Address: PO BOX 2741 y RENTON WA Y y. Zip: 98.056 Phone: 206-679-7260 y Notation: MITCHELL ENGINEERING INC. cUr 1140-140th Avenue N.E., Suite D Bellevue, Washington 98005 2060747-1500 , At L42QI erw.i404-„t. • ., X ZN..5- grr..17.)7.7..r 1V-ifialtdot.1 "••• , • P2/cidix126.-T L 9J>15=:74:g5-2 I .40. i)e.S;410teff-T. J24. • • - • - • • -• • . JiA84eA44 • - •RECEIVED • • . . CITYOPIIJ11:A-. SEP.. 1 51998 FERMit-CENIEFf ; • - PREPARED BY/ PROJECT 3014— 1-1111- •—• SHEET NO. f OF SUBJECT LATigAL 215/2 JOB NO. CIg/ DATE 5 15 1.111111111111MIIV MITCHELL ENGINEERING INC. • 7 7 1140-140th Avenue N.E., Suite D Bellevue, Washington 98005 206,747-1500 ., _ • • -I-1 _la , . • ..... _ . - .. .- . . . . ' 4 -7a.40 1 • • ' ' • I • : . . • • • • i 1412,6)' , • --- -• • • . - • gaa:••.! 2 . •,..... • • • • . J. I ' • , . • • i . • • . 7 -: , • I alfs. 11,3440p.Wz • 1 - • • • - . • • • i ; ; • : '•• • I • . . . • • • . • Fr • - - . 1 L7 )(1440. se • - da:p74.7 . • • ..• ..••• _ • • . • . • PREPARED BY I PROJECT 101 15 SUBJECT l4rgi2AL 1450•1 gi 55 2 JOB NO. C1950 1 DATE 'r. SHEAR WALL SCHEDULE C 6EM ,toe 2 8 125 I o 200 250 g 460 gM 3P .• 620 ggw, O ��!r'� Z8cV i• S p ... h ... 200 250 Q G tr1 V�1 N 377 492 MN �D 508 754 O• N .... 11 C g=--stiwwzas133132313 to icly ��pp � , .. t, ... 44, .r ,,,00000000 w.. O N J V1 .N.r1 1r1 N ^ .N.... tr, h /\ e. Plate Anchors $ CO et 00 0 t CO V9 $ 00 et 0 It CO tel 5/8"e @ 48" BBV CO et 00000000000 0 L 00 on CO of 9 t CO N 00 et B i 00 V'f s N VI m t CO V1 t et N m t 00 V1 $ .it N m 1 00 V1 t et N B 1 et CPI f et N 0 t 00 V1 1 et N 0 t e!' 1 P1 1 O N m t et fo1 1 V1 0 t et !h C tio V) — a Y , C .o eazz>. n No 1 z>4 Yes_] >=>4>4>4>4>4>4 .. w O F . - r 4" r l 'v J 4 2 . asWI! . N �7 4 'a' 1 '� . s cv s N--- 88 t$ N s cv !Q N f et t et t r 1 er I et it VP 4" 1 t en f N t VP f et t VI 8 N z in s • It t"1.ofr'1T aSEIBSSEEZ:E2tZZ CaCa r;N f?N ' O 14 •C c Cy la 3 = a, .0 O u 'C y C e9 C N 2 C gse au .. .8 14 Se 41 Sim N C C h In D 111 it << N Et << 1 IIS4 N • tigha<— ; O ' 1 N •• erei le; MITCHELL ENGINEERING INC. ish Ly„.: • • • . • • •_:.• .. _ . • _ . • . .I. , •, .._ ..... _ti._.. ,._.. _!. .. ._....• _•. , • . . ..1.-i.-i-..T . , . . • 1140-140th Avenue N.E., Suite D Bellevue, Washington 98005 206•747-1500 •_ . �7 / • !-;/[rV K��/' .--I"j ;--1•. h- t--r'-; • , , y....-'- 1-�1_ _f . . .7.;-: • • i_..;._;. ,�. � -{...-r-_- ..,_: _._._._.•., ;••_. D 3-��p$p -1 • • • .�..f..•_ .� .._.._._. , _. r 1 . ics No7 :Go 4 • /_ . w1 • '-._••; : -� : , •• r , 5.1.E _.__..... _. • • • •,�-•' , i PREPARED BY / q PROJECT (� SHEET NO. OF DATE 101 1,5 SUBJECT �T � ' A �� s/2 JOB NO, V MITCHELL ENGINEERING INC. I • .._ •._r 1 •;-::2�oklo�2: • / 1140-140th Avenue N.E., Suite D Bellevue, Washington 98005 206•747-1500 • 1 t , -j--_ — l - 'off --_J ; . • . • • _.._ . .._ 1. '.__. _• -,. -_ ; .. ... i.. -i _. _._.: _ i __ _..• •�.. . _.. . • • �....._.._.._..__ . • PREPARED BY 'v''r'' DATE "/5 /C15 PROJECT SUBJECT • �G�rra Gaut-2/lss/2 • SHEET NO. __ OF JOB NO, 95697 P-4 •••••••• • I A • <e> r R-4 t * .171f 64 64 1 7/lc,* fr"A-r-A=i .51-1goc-G-11,447 14iia4/04 4,.24a) -r a,r172, 1.11. AP 0,416frw, rti.15h512 P9-44c4uPri A I • 4 6-4- P INAIIS 6ro,Low. iEzia UAW irg44- 4e4,-th 26.5612 MICHAEL S. MITCHELL, P.E. MrTCHELL ENGINEERING, INC. 1140 140r.1, Avenue N.E.. Suite 0 • Ele!levy., Weehiniton 9E1005 (20e) 747-1500 r14 )gArsT . fe4 frg rigg 44r. _.,6.43-44J „......— MICHAEL S. MITCHELL, P.E. MITCHELL ENGINEERING, INC. 1140 140th Avenue N.E., Suite 0 • Bellevue. Washington 98CC5 . . MOB) 747-1500 `Ls 2 it'-rwocil 7, Tor rE (yJ4- JAL c4.1 IN/ 16.1 ac,ie. Ce.JQ cc, Ic;:c 14Nucticl "re:. 44)14. MITCHELL ENGINEERING INC. 1140-140th Avenue N.E., Suite Bellevue, Washington 980 206.747-15 • • • • . I • • tT22 • • '--7. • A5 - PREPARED BY PROJECT SHEET NO. OF -.-_. wohs Atittekai (pitoifitt) ..DESCRIPTION. LOTS S. 70 8 AND LOTS 21. 10 24.1 $LACK 10, OOTTUY Wt*KS ADDOTION, ACCORDING -no THE PLAT THEREOF RECORDED IN VOUJME 5 OF PLATS, PAGE 86, RECORDS OF KING COUNTY, WASH INGTON S EXCEPT -THAT poRTION of SAID LoT 21.1 1F ANY, Ly1NG WITHIN THE CITY OF SEAT LE. PIPE UN E. R16NT CF von, !STA/USN1;3 BY CRY OF S ORDINANCE NUMJER 6808 S 3UBSECr TO EASEIM!N1S; EXCTP'T1ONS, PJ6IiTS� ResnucTtoIp MP COVENANTS OF RE4PRD, IF ANY. 0 to 8 (oB74 IOW Z44.00' PLAT N 87°48'3Z"W 441 qv,o. Wine (Nor OPE "IRON PIPE N 8'1°4832" W 8 (074a •I c1 o3ta t Mya-oi-i-i C a !e87420 - 0d{0 SET L.S. 3 11-11 PLAT> CAR m 0 tiM z. • SEE DETAIL N 87°48' 32"W RI6HT WOOD FENCE ALONG LINE 1 11 M II ,1 -• 11 II.$ VOL 5 Zs toirl4o• 140 PLAT ij MEAS. qv 00.3 294.00' PLAT 111 zkL N 87 °48' 32 W (NoT OPEN) 7b: 97 tj. 4:4v; Q 6 lAW 3'S 3 :44 4 y:•• HAZEL. s ' o.1o'w. • 0 0- i caw) In d %saa, m o.o I's. 0.13' W. FcUNTAIN ST. VI Nar 5ET 0.08' W. e,J 6 % r N RECEIVED Cr OF TUKWILA EP 1 5 1998 RMIT CENTER 8q.- �.31$ • DESCRI PT ION • • LOTS i TO 8 AND LOTS 2,1 70 26, 3LDCK 10, POTTERY WORKS ADDITIM$, ACCORDING �v THE PLAT TMEREOp RECORDED IN VOLUME 5 OF PLATS, PAGE 86, RECORDS OF KIN6 COUNTY, WASHING10N; EXCEPT 'THAT pogTloN of SAID I,o r 21, IF ANY, LYING WITHIN THE CITY op SEATTLE PIPE UNE RI6HT CF wit4ESTMUSHO SYCRYoF SEPF7TLE ORDINANCE NUMaER 58o8; SU87ECr 70 EASEMiMiS; aXcE.rrtoNs, Ii1&HTS, g STRIc 7oNs AND COVENANTS OF MORD, IF ANY. vs 0 ta 0 v aD N CO 1- O z % FOUND :1" MOON PIPE g v a- N 87°48' 32" W 117.00' PLAT MEAS. 8 i 4 111.00' PLAT MEAS. N87*48'3Z"W 3 , L.S. 17443 ,' .. CTyP1URE < 1 17 PLATS revs V N • AREA = 4R, Iz9 s. F. 1.128 AC. 23 A r: �r f-;LrJt1 234.00' . _ ` PLAT 4 MEAS. iyo,o3' 51 294.00' PLAT N:87°48': 3Z" W 111.00' N 87•48' 24 24 I 17' PLA' U1'ni. (No•r OPEN • FOUND N 87°48' 32" W IRON PIPE 2 117.00' PLAT 4 MEAS. 8 - 4 _ i_" r _i.. j ",' 111.00' PLAT >r MEAS. N 87'48' 32"W 3 2. 3' o� z asp; SEE DETAIL N 87°48' 32"W RI&NT WOOD FENCE ALONG LINE • ail II W 0. 4- wy ssi 0.01 D.13 1 Ct IC 4z ' g woc 1.w Z o . x2 > AREA = 49,lU 129 S. F. ±. tr Q Z 2.128 AC.* I 23 f^a,j?J;"?"=r;F,,J Ovi �E HAZEL St. `. 0.10' W. VOL. 5 117.00' PLAT 4 MEAS. N 8'i"48' 3Z"W 24 a: %.1 ‘‘'N: N 25 \‘‘,. td..1 • SET L.S. 11663 CAP REMR C 117 PLAT> C1V. CAL ) S. 234 00' PLAT 4 MEAS• lob' RIND L.S. tah 117' PIAT> CAP 4 REBAR (IcAI ) 7/0' 97 244.00' PLAT 411 • N 87 °48' 32" W (No-r °PEN ) • 3 a o.o1'S. 0.13'W. (FOUNTAIN Sr.) N5ET 6 t-. "v. RECEIVED CITY OF TUKWILA SEP 1 5 1998 PERMIT CENTER SIS 1:131N9O.UV d 6661S . d3S V1IMW L d0 ula 03A1303b : 68742010 6S L o 14. • 0 QC kl j` 0 it. QIII 1-- O a_ O i- ds Bo Po a ,00'09 0 OAbfr►73n1I Li) sb-'r` 3„ 8E, 8 h o IO (V stt INFILTRATION SYSr-EN\ DESIGN ILL A N VI F IV NO SCALE PROFILE VIEW NO SCALE 065ERUATION Pipe. U''RtGID PERFEAATED Pi PE INFILTRAT/on' TRENCN R6OP DRAIN Ic'IGID SOLID PIPE WRAP GRAUE.1- GoMPI—MMOi ,,,n n m F«TEA Fw 6(t . u" RIGID PERF>~RAmD PIPE 'J \___su,hP W/SoLO LI1) ,Id-f0.0' A i01-o11 Fi ANESH SGREE.N I:gcf� I / I WASN ED Rocl< ouERFLow Pilo CoNC4ETZ I C E Icicle Creek Engineers Geotechnical, Geologic and Environmental Services C. Thomas Foster R.A.L. Development and Venture Company 1420 NW Gilman Boulevard, #2206 Issaquah, Washington 98027 August 18, 1998 neceiveD CITY OF TUI(WIIA SEP 1 5 1998 PERMIT CENTER Report Geotechnical Consultation Residential Development 51st Avenue S. and S. 11 lth Street Tukwila, Washington File No. 0133-005 INTRODUCTION This report presents the results of our geotechnical consultation regarding the disposal of roof downspout water on four residential lots referred to as Lots 7/8, 5/6, 22 and 23/24 of the Pottery Works Addition in Tukwila, Washington. The lots are located northwest of the intersection of 51st Avenue S. and S. 11lth Street on undeveloped property as shown on the Vicinity Map, Figure 1. Residential ,structures are planned on the subject lots. We understand that the city of Tukwila has indicated that the preferred method of roof downspout water disposal is infiltration. You have requested that we observe the site conditions and provide information, as appropriate, for installation criteria for a downspout drain infiltration system. SCOPE The purpose of our services was to evaluate the shallow soil and ground water conditions as a basis for estimating a soil infiltration rate. The services provided by Icicle Creek Engineers consisted of: 1. Complete a site visit to observe existing site conditions. 2. Excavate four shallow test holes (one on each lot) to a depth of four to six feet. 3. Field classify the grain size distribution of the soil regarding an estimated infiltration rate. 4. Provide recommendations for installation of a roof downspout infiltration system provided that the soil type(s) observed in the test holes are adequate for infiltration. SITE CONDITIONS GENERAL A geotechnical engineer from Icicle Creek Engineers conducted a site visit on August 12, 1998 to perform the geologic reconnaissance and excavate test holes to evaluate shallow subsurface conditions. The test holes were excavated using a shovel, digging bar, post hole digger and extendable hand auger. The property area is shown on the Site Plan, Figure 2. Icicle Creek Engineers, Inc., Meadow Creek Professional Center, 22525 SE 64th Place, Suite 202, Issaquah, Washington 98027 Telephone: (425) 557-4368 Fax: (425) 557-4369 0 ed aft• 0 C. Thomas Foster R.A.L Development and Venture Company August 18, 1998 Page 2 SURFACE CONDITIONS The four Tots are located on undeveloped property. From 51st Avenue South, the ground surface across the property area slopes gently to the west for about 100 to 150 feet, then slopes downward at about a 35 to 40 percent grade. The property is partially cleared and vegetated in local areas with dense brush and scattered trees. SUBSURFACE CONDITIONS Local geologic mapping by the U.S. Geological Survey (Waldron, H. H., et al, 1962 — Preliminary Geologic Map of Seattle and Vicinity, Washington) shows that the property area is mantled with "younger gravel." Younger gravel is described as "sand and gravel." Subsurface conditions at the property were evaluated by the excavation of four test holes (one on each lot). The locations of the test holes are shown on Figure 2. Observations of the ground water condition) were made as the test holes were excavated. The test holes encountered relatively uniform conditions consistent with regional mapping by the USGS (1964) as previously described. The following is a summary of soil and ground water conditions observed in the test holes: Test Hole TH-1 (Lot 22) 0.0 — 1.5 feet Loose to medium dense fine sand with a trace of gravel 1.5 — 4.0 feet Medium dense fine to medium sand with a trace of gravel Test Hole TH-2 (Lot 23/24) 0.0 — 6.0 feet Loose to medium dense fine to medium sand Test Hole TH-3 (Lot 7/8) 0.0 — 1.0 feet Loose fine to medium sand with scattered roots 1.0 — 4.5 feet Loose to medium dense fine to medium sand Test Hole TH-4 (Lot 5/6) 0.0 — 2.5 feet Loose to medium dense fine to medium sand with a trace of gravel and scattered roots 2.5 — 4.0 feet Medium dense fine to medium sand with a trace of gravel No ground water was observed in the test holes. CONCLUSIONS AND RECOMMENDATIONS We have reviewed standard design methods for disposal of roof downspout drainage using the King County Surface Water Design Manual (Section 4.5.1 Roof Downspout Infiltration Systems). Based on our review of these design methods for infiltration and soil/ground water conditions observed in the test holes, the surficial soils are suitable for infiltration of the proposed roof downspout disposal systems. Based on our visual classification of the soils encountered in the test holes, we recommend that an infiltration rate of 8 inches per hour be used for design of the roof downspout disposal systems at each of the four lots. Icicle Creek Engineers 0133005/081898 C. Thomas Foster R.A.L Development and Venture Company August 18, 1998 Page 3 USE OF THIS REPORT We have prepared this report for R.A.L. Development and Venture Company. When the design has been finalized, we recommend that the final design drawings and specifications be reviewed by our firm to see that our recommendations have been interpreted and implemented as intended. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted practices in this area at the time the report was prepared. No warranties or other conditions, express or implied, should be understood. ******************** We appreciate the opportunity to provide geotechnical services on this project. If you have any questions'or if we can be of further assistance, please call. EXPIRES i D 0 - K 'D 1 Document ID: 0133005.REP Two copies submitted 1. Yours very truly, Icicle Creek Engineers, Inc. Brian R. Beaman, P.E. Principal Engineer/Geologist Icicle Creek Engineers 0133005/081898 BRB:08/13/98 -�tL►a'���ma�i���.s� a: riEreilpit :,,..... r. ) ..\. 1 ‘ ,,: , ,c• ''')ittqt`411iir, . *i Wiv. Project Site eiltititt*Etilk. „:.--..: - ti 11—laallitiletli.w. MB re \ ',4 lie, 1 -A 4%4044 -rz., *---iNDLY., \Mtria.kmalitift* - AttanAVIE.!: ---Nfirsim ' dilwairtiii,,i.:k.., ran ,......., fIXIE ',TX \ Wilk '' --"`INta Z1:9 CI "Ali s ....1,- • !t, 1 1.1 r - '6 "_:. :7-r131 1 1:- wr �f�i/� /vv9rrr ��� � 1 �Q.Y►4 �J' RAR:BRB:08/13/98 Explanation: H-1 Test hole location Aug-20-98 02:59P Icicle Creek Engineers 206 557-4369 P.01 r o T e M Fc'sT618 -20 -18 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 4.5 INFILTRATION SYSTEM ANALYSIS AND DESIGN The specific requirements for the analysis and design of infiltration systems are dependent upon the type of facility. There are three basic types of infiltration systems allowed for use in King County: Roof Downspout Systems, Infiltration Tanks, and Infiltration Ponds. In general, ponds are preferable to tanks because of the ease of maintenance and the water quality treatment that surface soil and vegetation provide. Alternative systems such as small infiltration basins and modular pavement are also allowed, but these methods have many limitations. Requirements for the design of the various types of infiltration systems are presented in the sections which follow. 4.5.1 ROOF DOWNSPOUT INFILTRATION SYSTEMS All roof runoff from lots in new plats and short plats must be either infiltrated or dispersed, or stub - outs to the plat drainage system must be provided. Where lots are less than 22,000 square feet and infiltration is feasible, infiltration is required either on the individual lot or within the plat. If infiltration is not feasible and the dispersion criteria are met, dispersion is allowed (see Section 4.5.6). If infiltration or dispersion is not used, stub -outs shall be provided to connect the roof drains to the plat drainage system. Connections to the stub -outs shall be perforated connections, as described in 4.5.6. Roof downspout infiltration systems are infiltration trench systems intended only for use in infiltrating runoff from roof downspout drains. They are not designed to directly infiltrate any surface water that could transport sediment or pollutants such as from paved areas. Roof downspout systems are required in proposed plats and short plats where there is at least 3 feet of pervious soil above the water table and minimum lot size requirements are met, as detailed below. Where downspout infiltration is used, the roof area which is infiltrated need not be included in the impervious area used to calculate the R/D facility size. Limitations o A single roof downspout infiltration system can serve up to 5,000 square feet of roof area (A,,, described below). o Not allowed on slopes greater than 25% (4:1). o Not allowed in fill materials except in engineered sand and gravel fill, otherwise must be native soil. The placement of the engineered fill must be observed by a qualified representative of a licensed engineer, a geologist or soil scientist, and have a measured infiltration rate of not less than 3 inches per hour. Systems in engineered fill shall be designed using the fins sand criteria in Table 4.1.58. Infiltration rates shall be tested using the methods described in Section 4.5.2 o Roof downspout systems should be located at least.30 feet from any water supply well. o Limited for use only in the SCS soil types listed in Table 4.5.1A. See Figure 4.5.1A for USDA Soil Texture Triangle. o Minimum lot size requirements shall be as shown in Table 4.5.1A. TABLE 4.5.1A MINIMUM LOT SIZES FOR USE WITH DOWNSPOUT INFILTRATION Soil Texture Class (U.S.D.A.) Minimum Lot Size With Septic System Coarse sand or Cobbles No min 1 acre• No min 12,500 ft" Medium sand Fine sand, loamy sand 9600 ft2 15,000 ft:• Sandy loam 12,000 ft2 18,000 ft"• Loam 15,000 ft2 .5 acre • 4.5.1-1 11/94 Aug.20-98 02:59P Icicle Creek Engineers 206 557-4369 P.02 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL On lots >22,000 ft2, dispersion is required. Lots which are too small for infiltration systems shall either disperse the roof runoff (if the requirements in Section 4.5.6 are met) or tie into the proposed plat or short plat storm system. • Typical minimum lot size allowed by Seattle -King County Health Department for gravity septic system in this soil type with 4 feet of original soil. Less than 4 feet of original pervious soil above maximum water table either increases minimum lot size for gravity septic systems to 1 acre for all the above soil types or else it requires the use of a pressure, mound or sand filter system. Coarse sand/gravel sites may be less than .5 acre with the use of a pressure, mound or sand filter system. Check with Seattle -King County Health Department for any changes or for specific site requirements. NOTE: Minimum lot size, required separation between infiltration and septic systems, and distances from water supply wells shall be in accordance with Seattle -King County Health Department requirements. Design Criteria o See Figure 4.5.1 B and Figure 4.5.1 C for details. Figure 4.5.1 C applies to sites with coarse sand and cobble soils and is intended to provide additional water quality treatment in these coarse soils. o For roof downspout infiltration systems, a short report must be prepared by suitably trained persons working under the supervision of a licensed Professional Engineer or by a septic system designer licensed by King County, which includes a site sketch and soils logs. The approximate location of the proposed downspout infiltration system and septic system (if applicable) shall be shown on the approved plans. o A minimum of one soils log, minimum 4 feet in depth, that describes the SCS series of the soil, the textural class (as in Table 4.5.1 A) of the soil horizon through the depth of the log, and notes any evidence of high groundwater level, such as mottling, shall be obtained for each proposed roof downspout system location. Note, trench bottoms must be a minimum of 1 foot above seasonal high groundwater level or impervious soil layers. A minimum of 3 feet of pervious soil is required in roof infiltration areas. o Trenches may be located under pavement provided that a small yard drain/catch basin with a grate cover is placed at the end of the trench pipe such that if the trench infiltration capacity is exceeded, the overflow would occur out of the catch basin at an elevation of at least one foot below that of any overlying pavement, and in a location which can accommodate the overflow and meet the requirements of Section 1.2.1. o Minimum spacing,between trench center lines shall be 6 feet. o All trenches shall be a minimum of 10 feat from any structure, property line, Native Growth Protection Easement, Sensitive Area Tract or Sensitive Area Setback Area. Trench setbacks from septic systems shall be in accordance with Seattle -King County Health Department requirements. A trench can be located within 10 feet downslope of a structure foundation. Plot plan must show location of all of these features. A copy of the plot plan showing the downspout infiltration system and the other features shall be framed and mounted on a garage wall in the completed structure. o All trenches shall be a minimum of 50 feet from any steep slope (as defined by the Sensitive Areas Ordinance and Rules). This setback may be reduced to 15 feet based on a geotechnical engineering report but in no instances less than the buffer width. o Trench length shall not exceed 100 feet from the inlet sump. o Each trench shall have one observation pipe, that extends to the bottom of the trench, located at a point approximately halfway along the trench length. o Filter fabric shall be placed over the drain rock prior to backfilling. o Infiltration areas shall be clearly marked before site work begins to avoid disturbance of the soil during construction. No vehicle traffic shall be allowed within 10 feet of infiltration trench areas. *� 4.5.1-2 11/94 Aug,20-98 02:59P Icicle Creek Engineers • 206 557-4369 P.03 , KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL o A licensed septic system designer or suitably trained person working under the supervision of a licensed Professional Engineer shall make an inspection of the soil after the system is excavated, before the trenches are filled with rock to confirm that suitable soils are present. Method of Analysis/Length of Roof Downspout Infiltration Trenches The length of trench required is based on the U.S.D.A. soil texture class, the roof area and the site location, using Table 4.5.1 B. The length of trench required is determined by dividing the roof area by 1000 and multiplying by the unit length I from the chart for the soil type and multiplying the result by the regional scale factor k shown in Figure 4.5.1 D. The trench length L is computed using the following equation: L = (A„/1000)(l)(k) Where: = area of the roof tributary to the system, ft2. (Note: a typical single-family residence has a roof area of approximately 2,000 ft2.) = the unit length of trench required per 1,000 ft2 of roof area from Table 4.5.1B, ft' k = the regional scale factor from Figure 4.5.1D. TABLE 4.5.1E INFILTRATION TRENCH LENGTHS FOR RESIDENTIAL ROOF DOWNSPOUT INFILTRATION SYSTEMS Soil Texture Class (U.S.D.A.) Lineal Feet of Trench per 1000 ft2 of Roof - Sea Tac Lineal Feet of Trench per 1000 ft2 of Roof - Landsburg 1. Coarse sands or Cobbles 15 20 2. Medium sand 25 30 3. Fine sand, loamy sand 60 75 4. Sandy loam 100 _ 125 5. Loam 150 190 Example: Proposed residence located at Kent East Hill Roof area (AR) = 2,000 square feet; Soil Texture Class = loamy sand; From Table 4.5.1A, 60 ft trench/1000 ft2 of roof, from Figure 4.5.1D k = 1.0 L = 12000/1000)(60)(1.0) = 120 ft (Note: could be accomplished by two trenches). *_* 4.5.1-3 11/94 2158 Roof Area Total of roof area used to calculate requirements for the infiltration system design for the downspout drains equals 1793 square foot. Infiltration System calculations: L = 1.800sq. ft./ 1.000 (25) (1.0) L = 1.000 = 251f. + 800sq. ft. at 2.5 1.f. per each 100 sq.ft/ L.= 251f. + 201f. = 45 lf. Total 451f. 2 = 22.5 ( minimum length of each of two required drain lines) 0 w U N o C7 11 O `L H O H rtsm2 v EH a .I� o 4- 54 a U N CI CI 0CI CI 0 CI Ci CI C1 CI W ,Q) sa) :Q) 'a) ,a) sa) ,(1) s0 sa) ,a) sa) ul id) ,a) h sa) sa) b W to ,0 ,0 H b sa) s0 sa) zAo� a) ,a) w o ff' rx, ,0 44 se) PI E1 CW!) W O ,a) ,0 'U UU7i H H a W N �v sT, 7, H z w sa) IQ)O H El ,a) to smo UHAO IQ) , s0 sa) Oi H DI E' ,(I) IQ) wa3z IQ) 'a0) �. Ul H EllA sa) Pi sa) sa)N H P U ,a) 'a) w sa) U) O sa) 3S z sal sa0) uI H W 'v ,0 ,Q) N Ul O sa) sa) iri sa) H a CJ O 0 ' ,0 s(1) W 4 U 4 iN 'a)Eia,0 Nv ° Hiwwu. 'a ,Q) a sa) , 4JE-4 HZ sN �i sTi s 0 H o O H 'a)' Z o U) W E-+ U) ,a) s W W m W N M sa) 4-1 C7 a' E-+ H 'a) H l0 Es 'Ts sa) 'dEw4o °U sa) Q to IQ) MI U U U U U U 0 '0 'a 0 0 0 0 x 0 0 0 sa) 'a u ,0 IQ0) sal '0 0 a 0 0 Ci CI C) C) 13 0 0 ,td PLAN REVIEW/ROUTING SLIP ACTIVITY NUMBER: D98-0318 DATE: 9-15-98 PROJECT NAME: RAL DEVELOPMENT xx Original Plan Submittal Response to Incomplete Letter Response to Correction Letter # Revision # After Permit Is Issued DEPARTMENTS: Building Division Public Works ❑ Fire Prevention • ❑ Structural ❑ Planning Division Permit Coordinator DETERMINATION OF COMPLETENESS: (Tues, Thurs) DUE DATE: 9-22-98 Complete Incomplete Comments (e' -• g8 D l?•? Not Applicable n TUES/THURS ROUTING: Please Route / Routed by Staff No further Review Required (if routed by staff, make copy to master file and enter into Sierra) REVIEWERS INITIALS: DATE: 1 42' 5g APPROVALS OR CORRECTIONS: (ten days) DUE DATE: 10-20-98 Approved ❑ Approved with Conditions REVIEWERS INITIALS: Ai& Not Approved (attach comments) ❑ DATE: tofto/q6 CORRECTION DETERMINATION: DUE DATE: Approved ❑ Approved with Conditions ❑ Not Approved (attach comments) ❑ REVIEWERS INITIALS: DATE: \PR•ROUTE.DOC 6/98 CITY OF TUIC"'ILA Permit Center 6300 Southcenter Blvd., Suite 100; Tukwila, WA 98188 (206) 431-3670 topkit Single -Family Residential Permit Application Application and plans must be complete In order to be accepted for plan review. Applications will not be accepted through the mail or facsimile. Project Name/Tenant: Pa r-7Ef Y wow KS Acicd rc' r ,s/ Value of Cotruction: 7 Z/?i 066 Site Address: City State/Zip: 1 / o X x -1 A r AV&A l. So , ru ilw1L19 W4 . Tax Parcel Number: 69'7 ao I c, 0S. Pro erty Owner: 1 l4 ', , L. 1� eva iLo P M EN r- E tionl ru k E Co, Phon : is CC - 9 d of -a 14- 01 R2 MIT - /aa Street Address: / City State/Zip: I OAI,11J &iLM*'l ALuJ • I`a,4at sssr�iurl kM Fax #: (ro^n io$rER) , Contractor: 990a 7 P, 4 , L 0 GvEL DPM 9 N r Phone: . Street Address: City State/Zip: Fax #: Architect: OE-NIs 14n/LIAn1r Phone: . a06--87a-ase?o Street Address: City State/Zip: / 9 6 /3 - 45)/s r 4, Si Suit- A ili r, �9A. 98a32h Fax #: ♦ Engineer: r i cLt- CIQ1 J E_A/a-JAIt<EAs Phone: Wag-S57- 51346 Street Address: City State/Zip: aa5'as" Si E. 6iiU.. p1gcE Su, TPAb4? ' XSSI1 tuet% Fax #: Wii44 . iias--6-3'7- A134 Con ct Person: 9 eaa blot" sToL7 'Phone: ac76-679- -7a4o Street Addrew i City State/Zip: P, o 1is,x a 7 41 REjroff. L&&l94 I., Skez5-6 Fax #: Description of work to be done: CbWY S TA U. e r 14 AI Et() ! »'16 Type of work: 3 New Single -Family Residence ❑ Addition - Single -Family Residence Cl Interior Remodel- Single -Family Residence ❑ Residential Accessory Structure' ❑ Remodel/Addition to Accessory Structure ❑ Garage(s) ❑ Deck(s) - Covered & Uncovered , ❑ Residential Reroof Is this site served by: NI Sewer ❑ Septic (King County Health Dept. approval required - 296-4722) Existing Square Footage for Structure: sq. ft. Dwelling sq. ft. Covered Deck(s) sq. ft. Garage/Carport sq. ft. Accessory Structure(s) sq. ft. Uncovered Deck Proposed New Square Footage: 9 1% 4 1 sq. ft. Dwelling sq. ft. Covered Deck(s) "48 4 sq. ft. Garage/Carport 0 sq. ft. Accessory Structure(s) / 73 sq. ft. Uncovered Deck Floor Area Ratio: (total floor area of all structures divided by the area of the lot) *For an Accessory dwelling, provide the following: Lot area Floor area of principal dwelling Floor area of accessory dwelling ' Provide documentation that shows the principal owner lives in one of the dwellings as his or her primary residence. APPLICANT:REQUESTFOR RUBI;IC'.v,fORKSlSIiEiClr. I .#ANC i,E IIEWiOFrT E;FO I;Q`' jl(G (Aiidltiorial revieweahall tie determinedtbyahe PublicfWorks:Department)JM'1; 414,,.,i ❑ Channelization/Striping ❑ Flood Control Zone ❑ Moving an Oversized Loa ® Sanitary Side Sewer #: 53 Storm Drainage 53 Water Meter /Permanent # ❑ Water Meter Temp # ❑ Miscellaneous ❑ Curb cut/Access/Sidewalk ❑ Fire Loop/Hydrant (main to vault)#: Hauling ❑ Land Altering: 0 Cut cubic yds. Start Time: End Time: ❑ Sewer Main Extension 0 Private treet Use ❑ Water Main Extension 0 Private Size(s): q!Lt tr Size(s): Est. quantity: gal S�ize(s): 0 Fill cubic yds. 0 Public 0 Public Schedule: Value of Construction - In all cases, a value of constructiog,amount should be entered by the applicant. This figure will be re- viewed and is subject to possible revision by the Permit Center to comply with current fee schedules. Expiration of Plan Review - Applications for which no permit is issued within 180 days following the date of application shall ex- pire by limitation. The building official may extend the time for action by the applicant for a period not exceeding 180 days upon written request by the applicant as defined in Section 107.4 of the Uniform Building Code (current edition). No application shall be extended more than once. Date application accepted: Date applicatipn expires: ApXon taken by: (Initials) PLEASE SIGN BACK OF APPLICATION FORM SFPERMIT.DOC 2/13/97 I C E Icicle Creek Engineers Geotechnical, Geologic and Environmental Services C. Thomas Foster R.A.L. Development and Venture Company 1420 NW Gilman Boulevard, #2206 Issaquah, Washington 98027 August 18, 1998 cr4VECENED OP ruKwu 1998 PeRurrcravo Report Geotechnical Consultation Residential Development 51st Avenue S. and S. I l lth Street Tukwila, Washington File No. 0133-005 INTRODUCTION This report presents the results of our geotechnical consultation regarding the disposal of roof downspout water on four residential lots referred to as Lots 7/8, 5/6, 22 and 23/24 of the Pottery Works Addition in Tukwila, Washington. The lots are located northwest of the intersection of 51st Avenue S. and S. 111th Street on undeveloped property as shown on the Vicinity Map, Figure 1. Residential structures are planned on the subject lots. We understand that the city of Tukwila has indicated that the preferred method of roof downspout water disposal is infiltration. You have requested that we observe the site conditions and provide information, as appropriate, for installation criteria for a downspout drain infiltration system. SCOPE The purpose of our services was to evaluate the shallow soil and ground water conditions as a basis for estimating a soil infiltration rate. The services provided by Icicle Creek Engineers consisted of: 1. Complete a site visit to observe existing site conditions. 2. Excavate four shallow test holes (one on each lot) to a depth of four to six feet. 3. Field classify the grain size distribution of the soil regarding an estimated infiltration rate. 4. Provide recommendations for installation of a roof downspout infiltration system provided that the soil type(s) observed in the test holes are adequate for infiltration. SITE CONDITIONS GENERAL A geotechnical engineer from Icicle Creek Engineers conducted a site visit on August 12, 1998 to perform the geologic reconnaissance and excavate test holes to evaluate shallow subsurface conditions. The test holes were excavated using a shovel, digging bar, post hole digger and extendable hand auger. The property area is shown on the Site Plan, Figure 2. Icicle Creek Engineers, Inc., Meadow Creek Professional Center, 22525 SE 64th Place, Suite 202, Issaquah, Washington 98027 Telephone: (425) 557-4368 Fax: (425) 557-4369 40 %mei' 0 a5 aob 0 C. Thomas Foster R.A.L Development and Venture Company August 18, 1998 Page 2 SURFACE CONDITIONS The four lots are located on undeveloped property. From 51st Avenue South, the ground surface across the property area slopes gently to the west for about 100 to 150 feet, then slopes downward at about a 35 to 40 percent grade. The property is partially cleared and vegetated in local areas with dense brush and scattered trees. SUBSURFACE CONDITIONS Local geologic mapping by the U.S. Geological Survey (Waldron, H. H., et al, 1962 — Preliminary Geologic Map of Seattle and Vicinity, Washington) shows that the property area is mantled with "younger gravel." Younger gravel is described as "sand and gravel." Subsurface conditions at the property were evaluated by the excavation of four test holes (one on each lot). The locations of the test holes are shown on Figure 2. Observations of the ground water conditions were made as the test holes were excavated. The test holes encountered relatively uniform conditions consistent with regional mapping by the USGS (1964) as previously described. The following is a summary of soil and ground water conditions observed in the test holes: Test Hole TH-1 (Lot 22) 0.0 — 1.5 feet Loose to medium dense fine sand with a trace of gravel 1.5 — 4.0 feet Medium dense fine to medium sand with a trace of gravel Test Hole TH-2 (Lot 23/24) 0.0 — 6.0 feet Loose to medium dense fine to medium sand Test Hole TH-3 (Lot 7/8) 0.0 — 1.0 feet Loose fine to medium sand with scattered roots 1.0 — 4.5 feet Loose to medium dense fine to medium sand Test Hole TH-4 (Lot 5/6) 0.0 — 2.5 feet Loose to medium dense fine to medium sand with a trace of gravel and scattered roots 2.5 — 4.0 feet Medium dense fine to medium sand with a trace of gravel No ground water was observed in the test holes. CONCLUSIONS AND RECOMMENDATIONS We have reviewed standard design methods for disposal of roof downspout drainage using the King County Surface Water Design Manual (Section 4.5.1 Roof Downspout Infiltration Systems). Based on our review of these design methods for infiltration and soil/ground water conditions observed in the test holes, the surficial soils are suitable for infiltration of the proposed roof downspout disposal systems. Based on our visual classification of the soils encountered in the test holes, we recommend that an infiltration rate of 8 inches per hour be used for design of the roof downspout disposal systems at each of the four lots. Icicle Creek Engineers 0133005/081898 C. Thomas Foster R.A.L Development and Venture Company August 18, 1998 Page 3 USE OF THIS REPORT We have prepared this report for R.A.L. Development and Venture Company. When the design has been finalized, we recommend that the final design drawings and specifications be reviewed by our firm to see that our recommendations have been interpreted and implemented as intended. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted practices in this area at the time the report was prepared. No warranties or other conditions, express or implied, should be understood. ******************** We appreciate the opportunity to provide geotechnical services on this project. If you have any questions or if we can be of further assistance, please call. EXPIRES. - K E5 Document ID: 0133005.REP Two copies submitted Yours very truly, Icicle Creek Engineers, Inc. Brian R. Beaman, P.E. Principal Engineer/Geologist'. Icicle Creek Engineers 0133005/081898 BRB:08/13/98 � d r�OE��a��;;i el� a1 l Sfi ;•�"�19Sb��f�11t� ��wINEMININE 111371kUit ,•��•��� - ..�' ���� _ram-,rs,�.�. PnM RAR:BRB:08/13/98 8 21 ., ...-._ ..a,.. :'%:... .._ ..��. ... ... .. ... ... .... Figs ... ..._.,n.. 4 i 3 l i 1 I 2 ! 25 • 1 Base map provided by R.AL Development and Ventura Company 0 S. 111 th Street 40 80 Approximate Scale in Feet 26 Explanation: H-1 Test hole location Icicle Creek Engineers Site Plan - Figure 2 Aug-20,98 02:59P Icicle Creek Engineers 206 557-4369 00 P.01 T+oM F S10-98 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 4.5 INFILTRATION SYSTEM ANALYSIS AND DESIGN The specific requirements for the analysis and design of infiltration systems are dependent upon the type of facility. There are three basic types of infiltration systems allowed for use in King County: Roof Downspout Systems, Infiltration Tanks, and Infiltration Ponds. In general, ponds are preferable to tanks because of the ease of maintenance and the water quality treatment that surface soil and vegetation provide. Alternative systems such as small infiltration basins and modular pavement are also allowed, but these methods have many limitations. Requirements for the design of the various types of infiltration systems are presented in the sections which follow. 4.5.1 ROOF DOWNSPOUT INFILTRATION SYSTEMS All roof runoff from lots in new plats and short plats must be either infiltrated or dispersed, or stub - outs to the plat drainage system must be provided. Where lots are less than 22,000 square feet and infiltration is feasible, infiltration is required either on the individual lot or within the plat. If infiltration is not feasible and the dispersion criteria are met, dispersion is allowed (see Section 4.5.6). If infiltration or dispersion is not used, stub -outs shall be provided to connect the roof drains to the plat drainage system. Connections to the stub -outs shall be perforated connections, as described in 4.5.6. Roof downspout infiltration systems are infiltration trench systems intended only for use in infiltrating runoff from roof downspout drains. They are not designed to directly infiltrate any surface water that could transport sediment or pollutants such as from paved areas. Roof downspout systems are required in proposed plats and short plats where there is at least 3 feet of pervious soil above the water table and minimum lot size requirements are met, as detailed below. Where downspout infiltration is used, the roof area which is infiltrated need not be included in the impervious area used to calculate the R/D facility size. Limitations o A single roof downspout infiltration system can serve up to 5,000 square feet of roof area (AA, described below). o Not allowed on slopes greater than 25% (4:1). o Not allowed in fill materials except in engineered sand and gravel fill, otherwise must be native soil. The placement of the engineered fill must be observed by a qualified representative of a licensed engineer, a geologist or soil scientist, and have a measured infiltration rate of not less than 3 inches per hour. Systems in engineered fill shall be designed using the fine sand criteria in Table 4.1.5B. Infiltration rates shall be tested using the methods described in Section 4.5.2 o Roof downspout systems should be located at least 30 feet from any water supply well. o Limited for use only in the SCS soil types listed in Table 4.5.1A. See Figure 4.5.1A for USDA Soil Texture Triangle. o Minimum lot size requirements shall be as shown in Table 4.5.1A. TABLE 4.5.1A MINIMUM LOT SIZES FOR USE WITH DOWNSPOUT INFILTRATION Soil Texture Class (U.S.D.A.) Minimum Lot Size With Septic System Coarse sand or Cobbles No min 1 acre• Medium sand' No min 12,500 ft" Fine sand, loamy sand 9600 ft2 15,000 ft2• Sandy loam 12,000 ft2 18,000 ft=• . Loam 15,000 ft2 .5 acre • *. 4.5.1-1 11/94 Aug-20-98 02:59P Icicle Creek Engineers 206 557 - 4369 P.02 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL On lots >22,000 ft=, dispersion is required. Lots which are too small for infiltration systems shall either disperse the roof runoff (if the requirements in Section 4.5.6 are met) or tie into the proposed plat or short plat storm system. • Typical minimum lot size allowed by Seattle -King County Health Department for gravity septic system in this soil type with 4 feet of original soil. Less than 4 feet of original pervious soil above maximum water table either increases minimum lot size for gravity septic systems to 1 acre for all the above soil types or else it requires the use of a pressure, mound or sand filter system. Coarse sand/gravel sites may be Tess than .5 acre with the use of a pressure, mound or sand filter system. Check with Seattle -King County Health Department for any changes or for specific site requirements. NOTE: Minimum lot size, required separation between infiltration and septic systems, and distances from water supply wells shall be in accordance with Seattle -King County Health Department requirements. Design Criteria o See Figure 4.5.1 B and Figure 4.5.1C for details. Figure 4.5.1C applies to sites with coarse sand and cobble soils and is intended to provide additional water quality treatment in these coarse soils. o For roof downspout infiltration systems, a short report must be prepared by suitably trained persons working under the supervision of a licensed Professional Engineer or by a septic system designer licensed by King County, which includes a site sketch and soils logs. The approximate location of the proposed downspout infiltration system and septic system (if applicable) shall be shown on the approved plans. o A minimum of one soils log, minimum 4 feet in depth, that describes the SCS series of the soil, the textural class (as in Table 4.5.1 A) of the soil horizon through the depth of the log, and notes any evidence of high groundwater level, such as mottling,, shall be obtained for each proposed roof downspout system location. Note, trench bottoms must be a minimum of 1 foot above seasonal high groundwater level or impervious soil layers. A minimum of 3 feet of pervious soil is required in roof infiltration areas, o Trenches may be located under pavement provided that a small yard drain/catch basin with a grate cover is placed at the end of the trench pipe such that if the trench infiltration capacity is exceeded, the overflow would occur out of the catch basin at an elevation of at least one foot below that of any overlying pavement, and in a location which can accommodate the overflow and meet the requirements of Section 1.2.1. o Minimum spacing between trench center lines shall be 6 feet. o All trenches shell be a minimum of 10 feet from any structure, property line, Native Growth es tion a Prolsement Sensitive rea Tract or Sensitive Area Setback Area. trench setbacks from septic systems shall be in accordance with Seattle -King County Health Department requirements. A trench can be located within 10 feet downslope of a structure foundation. Plot plan must sWiocation oo alfof these features. A copy of the plot plan showing the downspout infiltration system and the other features shall be framed and mounted on a garage wall in the completed structure. o All trenches shall be a minimum of 50 feet from any steep slope (as defined by the Sensitive Areas Ordinance and Rules). This setback may be reduced to 15 feet based on a geotechnical engineering report but in no instances less than the buffer width. o Trench length shall not exceed 100 feet from the inlet sump. o Each trench shall have one observation pipe, that extends to the bottom of the trench, located at a point approximately halfway along the trench length, o Filter fabric shall be placed over the drain rock prior to backfilling. o Infiltration areas shall be clearly marked before site work begins to avoid disturbance of the soil during construction. No vehicle traffic shall be allowed within 10 feet of infiltration trench areas. 4.5.1-2 11/94 • Aug-20c98 02:59P Icicle Creek Engineers 206 557-4369 P.03 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL o A licensed septic system designer or suitably trained person working under the supervision of a licensed Professional Engineer shall make an inspection of the soil after the system is excavated, before the trenches are filled with rock to confirm that suitable soils are present. Method of Analysis/Length of Roof Downspout Infiltration Trenches The length of trench required is based on the U.S.D.A. soil texture class, the roof area and the site location, using Table 4.5.1 B. The length of trench required is determined by dividing the roof area by 1000 and multiplying by the unit length I from the chart for the soil type and multiplying the result by the regional scale factor k shown in Figure 4.5.1 D. The trench length L is computed using the following equation: L = (AR/1000)(l)(k) Where: AR = area of the roof tributary to the system, ft'. (Note: a typical single-family residence has a roof area of approximately 2,000 ft2.) I = the unit length of trench required per 1,000 ft2 of roof area from Table 4.5.1B, fr1 k = the regional scale factor from Figure 4.5.1 D. TABLE 4.5.1E INFILTRATION TRENCH LENGTHS FOR RESIDENTIAL ROOF DOWNSPOUT INFILTRATION SYSTEMS Soil Texture Class (U.S.D.A.) Lineal Feet of Trench per 1000 ft2 of Roof - Sea Tac Lineal Feet of Trench per 1000 ft2 of Roof - Landsburg 1. Coarse sands or Cobbles 15 20 2. Medium sand 25 30 3. Fine sand, loamy sand 60 75 4. Sandy loam 100 125 5. Loam 150 190 Example: Proposed residence located at Kent East Hill Roof area (AR) = 2,000 square feet; Soil Texture Class = loamy sand; From Table 4.5.1A, 60 ft trench/1000 ft2 of roof, from Figure 4.5.1D k = 1.0 L = (2000/1000)(60)(1.0) = 120 ft (Note: could be accomplished by two trenches). * 4.5.1-3 11/94 2158 Roof Area Total of roof area used to calculate.requirements for the infiltration' system design for the downspout drains equals 1793 square foot. Infiltration System calculations: L = 1.800sq. ft./ 1.000 (25) (1.0) L = 1.000 = 251f. + 800sq. ft. at 2.5 l.f. per each 100 sq.ft/. L = 251f. + 201f. = 45 lf. Total 451f. = 2 = 22.5 ( minimum length of each of two required drain lines INFILTRATION SYSTEM DESIGN FL/IN VIFW No SCAt.E PROFILE VlEk NO SCALL OBSERUATIO►1 PIPe:, LJ'rRI6ID PERFEPATCD PIPE '" RIGID SoLII PIPE INFILTRI9T!OA' TRENLN rwRAP GRAUEI— connPLG7"L'L`I wcTb. ) ILTEA FAbR-C. N'RIGID PGRFERAraD PIPE. 2 3-O' 4EAci4 I /2.'I.1-- WAsNEO ROCK RooF IIC^DRAuJ � )J 1\___ su Ns w/SaW LID _41 D Ark Id ovERFLow P4rro Go.siG4ET6 10.0' D'OI,�� FrAla MESH ScRE'v CITY OF TUKWILA Permit Center 6300 Southcenter Boulevard, Suite 100, Tukwila, WA 98188 Telephone: (206) 431-3670 H-15 ACTIVITY #: .030 WASHINGTON STATE ENERGY CODE RESIDENTIAL COMPLIANCE FORM PRESCRIPTIVE APPROACH 1. HEAT SOURCE: GAS Fo i C-E D 41 k (gas, oil, propane, heat pump, electric) 2. WINDOW SCHEDULE: Fill in the window schedule based upon the proposed residential design and calculate the glazing area as % of the conditioned floor area. 3. CHECK PRESCRIPTIVE OPTION: Glazing percentage will determine which option to choose. Mark option at top of column. (See back of this sheet) WINDOW SCHEDULE GLAZING/SKYLIGHTS BY TYPE NO MANUFACTURER FRAME MATERIAL MODEL # SIZE U-VALUE AREA S.F. 3 fLP/"IE v/kl'/c. a 7 0 69x5° . sl 90 1 70x3° .yg al .3 5°x s ° •5 / 75 _ 3 ° xs° • A-19 30 1 [v°Xd'D .S/ L10.3 / 6°469 .5/ 1-4o15 1 3434 ,51 o, SaxL ° 4.51 Lid a •1bxy° .51 A-18 a ( 141c5O ,• I is TOTAL GLAZING AREA L /3 S.F. - TOTAL CONDITIONED FLOOR AREA ayy� TOTAL GLAZING AREA 44 (add entire column) S.F. x 100 = PROPOSED GLAZING PERCENTAGE /6, 92./o The proposed glazing percentage must be Tess than or equal to the glazing percentage listed under the prescriptive option that is selected. ENRGYCOD.DOC 2/13/97 CHAPTER 6, PRESCRIPTIVE OPTIONS FOR ALL "R" OCCUPANCIES, CLIMATE ZONE I NO re ll rrvi e,t a requirements of each of the options in the charts below. From the table that refers to your heat soitirce, choose the option that best suits your dwelling design. Glazing percentage determines which option to choose. Your building design must match the selected option requirements without exceptions or substitution. Design drawings must indicate all applicable requirements from table. HVAC AFUE'. Glazing max: %of floor U-value 2 Door U-value (R-value) Ceilings:, with attics vaulted Walls: above grade below grade Interior OR exterior Floor Slab on grade: OPT I 0 >;78 10% 0.70 0.40 (R-2.5) HEAT SOURCE: OTHER (gas, oil, propane, heat pumps) OPT II 0 >.78 12% 0.65 0.40 (R-2.5) R-30 . . ;°l. R-30 R-15 R-15• R-10 R-19, R-10 OPT III R-19 R=19 • R-10.• R-19: R -10 .: OPT IV 0 > .78. 21% 0.65 0.40. (R-2.5) R-30 R-19 R-19 OPT V 0 > .74 . 21% 0.60 0.40 (R-2.5). R-30 R-30 R-19 R-19: R=10 R=19 R-10 * < two stories ' The ">" symbol means more than or equal to; "<" means Tess than or equal to. 2 Glazing trade-offs may be made if the Option U-value requirement is not exceeded. PLAN REVIEW (for official use only) OPT VI* OPT VII* 0 0 > .78 25% 0.50 0.40 (R-2.5) Selected Option is appropriate for this dwelling design. ❑ YES ❑ NO ` Option may be a better choice. Notes: Approved by: Date: ENRGYCOD.DOC 2/13/97 1 CITY OF TUKWILA Permit Center 6300 Southcenter Boulevard, Suite 100, Tukwila, WA 98188 Telephone: (206) 431-3670 H-15 ACTIVITY #: MINIMUM VENTILATION REQUIREMENTS FOR RESIDENTIAL OCCUPANCIES FOUR STORIES AND LESS Chapter 51-13 W.A.C. Source specific and whole house ventilation systems are required for residential occupancies. In addition, exhaust ventilation fans must provide specific performance ratings and (in the case of the whole house fan) specific "Sone" ratings. Fill in the exhaust fan schedule below with the fan manufacturer's name, model number and performance rating. Secondly, check the criteria that applies to your design. ❑ Exhaust ventilation sha I be provided for each dwelling unit as follows (S. 302): LOCATION MINIMUM AT .25 W.G. MFR./MODEL FAN LABEL CFM (.1 W.G.) KITCHEN FAN 100 CFM AI (4 rvive.51.4230 Ah4T040 110 CCC yyj /00 CFhJ BATHROOM FAN 50 CFM BATHROOM FAN 50 CFM Als4nw o 6 gs 7r teen BATHROOM FAN 50 CFM 1J//4' VAle 69-C 70 c.F/Yk LAUNDRY FAN 50 CFM Nurm/e OS -le) c.FI\ lo WHOLE HOUSE FAN* 0 50 CFM (1-2 BEDROOMS) (CHOOSE ONE) 0 80 CFM (3 BEDROOMS) • 100 CFM (4 BEDROOMS) - Al *Whole house fan also serves as a kitchen or bath spot fan: 0 YES ANo If a spot fan is designated as a whole house fan, the capacity shall be the larger CFM requirement. pa Whole house fan: Location attic fan is closer than 4' to 0 Whole house fan is listed/labeled 0 Whole house fan wiring 0 Whole house fan shall bil'M ra W1 Sone rating • S' (< 1.5 if ceiling) "for Continuous use." for control routed to central location. run continuously: Kitchen rate 25CFM, bath & laundry rate 20CFM. 11 Integrated forced -air furnace ventilation (IAC Code S. 303.1.2(b)) shall be used instead of a whole house fan and fresh air inlets in the bedrooms: 0YES 0 NO 0 If yes, a 6" outside air inlet duct with damper limiting the ventilation rate to .35-.5 ACH, shall run from the building exterior to the furnace return plenum. 11 Mechanical ventilation fan ducts shall be > 4" and properly sized using IAQC, Table 3-3. ❑ Fresh air shall be provided for each unit as follows: (IAQ Code, S. 302.6.1): 0 Each bedroom: Tested, screened, controllable, through -wall port (>_ 4 sq. in.) to the exterior. 0 Overall living area: One wall port as specified for bedrooms. OR: IjCentral forced air furnace which delivers outside makeup air through the ducting system. ENRGYCOD.DOC 2/13/97 CHAPTER 6, PRESCRIPTIVE OPTIONS FOR ALL "R" OCCUPANCIES, CLIMATE ZONE I HEAT SOURCE: ELECTRIC (except heat pumps) OPT I OPT II OPT III OPT IV OPT V OPT VI OPT VII* OPT VIII* 0 0 0 0 0 0 0 0 Glazing max: %:of floor: U: value 2 Door U-value (R-value) Ceilings: with 'attics vaulted .:. Walls::; above grade below grade interior On exterior Floor .. . Slabon.grade< 12%.... 0:43 0.20 • :•R=38`• ,R-30• • 12% 0:40 (R-2 5) R-38 R=30 21%'. 0.36 * < two stories ' R5 foam sheeting' required in addition to R19 cavity insulation. 2 Glazing trade-offs may be made if the Option U-value requirement is not exceeded. PLAN REVIEW (for official use only) Selected Option is appropriate for this dwelling design. ❑ YES ❑ NO Option may be a better choice. Notes: Approved by: Date: ENRGYCOD.DOC 2/13/97 96/9 DO0'31f OH- Id\ :31ya :S1d!lINI S213M3IA321 n (sauawwoo yaeaae) panoaddy aoN :31ya 3na suo!alpuoJ ya!M panoaddy ❑ panoaddy :NOIIVNIWN3130 NOII3321HOJ b :31ya J�jj'(sauawwoo yae�ae) panoaddy aoN 86-0Z-0T :31ya 3na :S1V111NI S2J3M3IA321 suo!alpuoD 1 !M panoaddy ❑ panoaddy (s/(ep uaa) :SNOIl332ibOJ 210 S1VAObddd :31ya :S1V111N1 S213M31A321 (eilais olui aaaua pue ali) iaisew Adoo.alew /q pamoi ii) n jeis Aq paano21 paa!nbaI Ma!nai aaipin} oN aano� aseald :»NI1f10H S21f1H1/S3f11 ail)( bl algeo!Iddy aoN 86—ZZ-6 :31ya 3na 1.--?-1-;Z 3-w,// -').1'12/71 0/Y :sauawwoJ aaaldwooul ❑ aaaldwoj (sanyl'sanl) :SS3N3131dWOJ JO NOIIVNIV1H3130 n aoaeu!paooJ *wad uo!s!AIQ Su!uueld IeanaonaaS uo!auanaad aa!3 s)IJoM o!Ignd uo!s!n!a ?u!pIlnB :S1N3WI21Vd30 panssi sI a!waad Jaw # uo!s!na21 # aaaaal uopauoj oa 9suodsa1 aaaaal aaa!dwooui oa asuodsa21 !eaa!wgnS ueld leu!S!a0 xx aozanaa :3WVN 1D3I01id 86-51-6 :31da 81£0-868 :11380/f1N ALIAIJJV dI1S 9NllflOb/M31A311 Ndld RETAKE O PREVIOUS D 0 CUMENT Glazing max: % of floor' U-value 2 Door U-value (R-value) • Ceilings:;:• ::.rwith attics: vaulted Walls: above grade, below interior , exterior Floor :.: Slab^on grade` OPT II OPT III OPT IV OPT V OPT VI OPT VII* OPT VIII* 0 O O 0 0 0 0 CHAPTER 6, PRESCRIPTIVE OPTIONS FOR ALL "R" OCCUPANCIES, CLIMATE ZONE I HEAT SOURCE: ELECTRIC (except heat pumps) OPTI 0 :10%0: 0.46 :. . 0.40 (R-25).;' R=38 • ;R-21: * <two stories` R5 foam sheeting'required in addition to R19'cavity insulation. 2 Glazing trade-offs may be made if the Option U-value requirement is not exceeded. PLAN REVIEW (for official use only) Selected Option is appropriate for this dwelling design. ❑ YES ❑ NO Option may be a better choice. Notes: Approved by: Date: C.� ENRGYCOD.DOC 2/13/97 PLAN REVIEW/ROUTING SLIP ACTIVITY NUMBER: D98-0318 DATE: 9-15-98 PROJECT NAME: RAL DEVELOPMENT XX Original Plan Submittal Response to Incomplete Letter Response to Correction Letter # Revision # After Permit Is Issued DEPARTMENTS: Building Division Public Works Fire Prevention Structural Planning Division Permit Coordinator C DETERMINATION OF COMPLETENESS: (Tues, Thurs) DUE DATE: 9-22-98 Complete n Incomplete (Not Applicab_l/e,, n Comments: ,/o U1ikt,- ,i L f4,�-t,.ew� Tukw(�la Wa1-e(R TUES/THURS ROUTING: Please Route C No further Review Required Routed by Staff n (if routed by staff, make copy to master file and enter into Sierra) REVIEWERS INITIALS: DATE: APPROVALS OR CORRECTIONS: (ten days) DUE DATE: 10-20-98 Approved Approved with Conditions REVIEWERS INITIALS: cwo Not Approved (attach comments) DATE: /25fyf' CORRECTION DETERMINATION: DUE DATE: Approved ❑ Approved with Conditions Not Approved (attach comments) ❑ REVIEWERS INITIALS: DATE: \PR•ROUIE.DOC 6/9B City of Tukwila John W. Rants, Mayor Fire Department Thomas P. Keefe, Fire Chief September 25,1998 Fire Department Review Control #D98-0318 Re: RAL Development 51st Avenue South Dear Sir: The attached set of building plans have been reviewed by the Fire Prevention Bureau and are NOT APPROVED as submitted. The following concerns must accompany the plans in order to properly evaluate: 1. Provide existing ingress/egress easements forall affected lots. 2. Show access to lots 7 and 8, including turn -around• provisions, on a map to scale. Ygurs truly, The Tukwila Fire Prevention Bureau cc: TFD file ncd Headquarters Station: 444 Andover Park East • Tukwila, Washington 98188 • Phone: (206) 5754404. • Fax. (206) S75-4439 City of Tukwila Fire Department Fire Department Review Control #D98-0318 John W. Rant; Mayor Thomas P. Keefe, Rre Chef September 25, 1998' Re: RAL Development - 51st Avenue South Dear Sir: The attached set of building plans have been reviewed by the Fire Prevention Bureau and are NOT APPROVED as submitted. The following concerns must accompany the plans in order to properly evaluate: 1. Provide existing ingress/egress easements affected lots. for all. 2. Show access to lots 7 and 8, including turn -around provisions, on a map to scale. Yours truly, The Tukwila Fire Prevention Bureau cc: TFD file ncd Headquarters Station: 444 Andover Park East • Tukwila, Washington 98188 • Phone:(206) 575.4404 • Fax (206) 575.4439 CITY OF TUK(''ILA Permit Center 6300 Southcenter Blvd., Suite 100; Tukwila, WA 98188 (206) 431-3670 Single -Family Residential Permit Application Application and plans must be complete in order to be accepted for plan review. Applications will not be accepted through the mail or facsimile. Project AO Name/Tenant:4Ide94 KS A el� t T W A/ Value of Construction: O68 4b vr:: CJ Site Address: City State/Zip: 11 n X)( S 1 r AuEikl. So , -ru kw)1.J9 G[J19 , f Tax Parcel Nu 697 &I D I o 6so Pro erty Owner I t W. Ai Li 1JPvELoPM EAl r £ I)EAl rulQE Co, Phonp : %- - 9 I do& -a L -ofR4 =YrIao Street Address: City State/zj p: IyaOA/,ly, CrjLM44 iLuei, z` at6 -Tssaftf4»h,k2y Fax #: (roAA roSrER) Phone: Contractor: 9Po 7 hQ. 41 L D'vELo1M9N r Street Address: City State/Zip: Fax #: Architect: DESIGAlS gnlLIMiraa Phone:., 006-87a-as8o Street Address: City State/Zip: /9 613 - AP/Sr- t4v Si Sutra A 11i v i €)A, 98Oe.3?, Fax #: • , Engineer: xC / GLIB C R k En1GJA1iEAS phone: slag-SS7- (1345 Street Address: City State/Zip: aa5'a5- Si E, 6111, /9G#cL su, rEaaa • xssAAtiteil Fax #: W454 , A- -SS"-- &133 Con ct Person: 9 glo„ >; 7 ijob sTo/:7. Phone: ao6-679- 7.240 Fax #: Street Addre City State/Zip: f Q, ,ox a 7 4 I PE.vr f. i€1135 4. Vets-6 Description of work to be done: Cep! S T-JQ u e r i4 A/E-u) bJo m e- , Type of work: 3 New Single -Family Residence ❑ Addition - Single -Family Residence ❑ Interior Remodel- Single -Family Residence ❑ Residential Accessory Structure* ❑ Remodel/Addition to Accessory Structure ,. ❑ Garage(s) ❑ Deck(s) - Covered & Uncovered ❑ Residential Reroof Is this site served by: MI Sewer ❑ Septic (King County Health Dept. approval required - 296-4722) Existing Square Footage for Structure: sq. ft. Dwelling sq. ft. Covered Deck(s) sq. ft. Garage/Carport sq. ft. Accessory Structure(s) sq. ft. Uncovered Deck Proposed New Square Footage: oZ it-i I sq. ft. Dwelling sq. ft. Covered Deck(s) '=-i8 -1 sq. ft. Garage/Carport 0 sq. ft. Accessory Structure(s) / 73 sq. ft. Uncovered Deck Floor Area Ratio: (total floor area of all structures divided by the area of the lot) "For an Accessory dwelling, provide the following: Lot area Floor area of principal dwelling Floor area of accessory dwelling " Provide documentation that shows the principal owner lives in one of the dwellings as his or her primary residence. . APPLICANT'REQUEST:FOR P.UBL C.WOFKS SITE/C!1/jll,:tP.LI`gN';')jEV�EW?OFTHE!F.94.9 (Additlorial reviews shall be'determinedby:tiie P, utillcWiirks:Departrnet7t):r;ti'xl! 7 ❑ Channelization/Striping ❑ Flood Control Zone ❑ Moving an Oversized Loa ® Sanitary Side Sewer #: 0 Public 21 Storm Drainage 0 Public RI Water Meter /Permanent # ❑ Water Meter Temp # ❑ Miscellaneous ❑ Curb cut/Access/Sidewalk ❑ Fire Loop/Hydrant (main to vault)#: Size(s): Hauling ❑ Land Altering: 0 Cut cubic yds. 0 Fill cubic yds. Start Time: End Time: ❑ Sewer Main Extension 0 Private Street Use ❑ Water Main Extension 0 Private Size(s): 3/L is Size(s): Est. quantity: gal Schedule: Value of Construction - In all cases, a value of constructiog,arnount should be entered by the applicant. This figure will be re- viewed and is subject to possible revision by the Permit Center to comply with current fee schedules. Expiration of Plan Review - Applications for which no permit is issued within 180 days following the date of application shall ex- pire by limitation. The building official may extend the time for action by the applicant for a period not exceeding 180 days upon written request by the applicant as defined in Section 107.4 of the Uniform Building Code (current edition). No application shall be extended more than once. Dale application acted: -/S-9P Date applicatign expires: J-15--q9 Applgon taken by: (Initials) PLEASE SIGN BACK OF APPLICATION FORM SFPERMIT.DOC 2/13/97 • DESCRI PT ION LOTS i TO 8 ANo LOTS Zl To 26, BLOCK 10, POTTERY WORKS ADDrfO$, ACCORDING lv THE PLAT THEREOF RECORDED II4 VoWME 5 OF PLATS, PAGE S6, RECORDS OF KING COUNTY, WASHING'7ON; EXCEPT THAT PoR'T'1ON OF SAID LOT 21, IF ANY) Ly1NG WITHIN THE CITY OF SEATII.S. PIPE UNE R161fT Of WAX ZSi>AUSHW BYCrT?OF SEE ORDINANCE NUMBER 5808; su87ECT Tn EASEMrM5, SXCEPT'IONS, 1C16HTS, RBSiR1cT IoN5 AND ooVENANT S OF RF.GDRDj IF ANY. • • v/ gl 0 tn n 2 O 2 30' FOUND IRON PIPE Q- N87°48'32"W 117.00' PLAT 4 MEAS. 8 4 on-7- r' c't v 11'7.00' PLAT 4 MEAS. N 87'18' 3Z"W 3 SET L.S. 17%43 ; CAP 4. REBAR < I 1-71 NAT> 8 2'3+.00. z. N 87"48' WObP FEN / /" $ "s o AREA 44, IZ9 S: 1128 23 R K9 • a, ' d 117. N87 24 2 Q N 25 PLAT 4 MEAS. 40,0.3. 294.00' PLAT 26 1I7'PI. SET L.S. I1643 GAP REBAR < 117 PLAT> .. C�rvIu1J s. • O z• SEE DETAIL N 87°481 32"W RIGHT WOW FENCE ALONG LINE 234. 00' PLAT f MEAS. qo'o.' 294.00' PLAT N 87°48'3Z"W 24 aob,' ND 117' PLATS CCAAp 4 !MBAR (ICAL.) .--. tu. (NOT OPEN ) tt 83 o.ol'S. O.13' W. N� h (FouNTArN ST..) "s 4.J.V. H. 61,4 taZ 4E HAZEL 3,:. O.IO' W. N RECEIVED OF TUKWIIA CEP 1 5 1998 RMIT CENTER 31� IMP MITCHELL ENGINEERING INC. 1140-140th Avenue N.E., Suite D Bellevue, Washington 98005 206'747-1500 i • r • . . : ...... • TP1 • • - • ' )ci5gE.___2•1 rri .• L. 12 sr.. .J:1...--'.,5vzzaz,->4..15= 7 2, im34 em-04 ..,:)e.g;.>4.10teF.z. iz4gio- • - • • - itJ ais ci r 44=41 . • 2_ -11E0OVED • .CrmuTTVIONILA ' -PERM 'CENTER • • .... k-411-4, 10171::k. • wAi ••;' • .% • -207.71 67* • • PROJECT SUBJECT • UpILIIML=1 SHEET NO. ' OF l-ATEA4L— 4 215/2 JOB NO CI-568/ JIL MITCHELL ENGINEERING INC. : ; : ; • • -; . _ I. • 1•••.••••...i• Li . I - ; rr7"... • - • 7 ' -r- • • ; • • . • • • . • :••• -a•,110 ••• 4 -I A—k 1140-140th Avenue N.E., Suite D Bellevue, Washington 98005 206•747-1500 •; ;�. SHEAR WALL SCHEDULE • C V 2 g-N- 150 200 Nr 460 I g 3 .• 0LL 1 Ca 920 1 ab -- D Cer .. . 8 N h 200 n !r1 h 377 a ea 508 tp. 984 ey Plate • Nailing a C °•N—®t��(�60t��0t�l� a... V 0' . cv,�nnv'► s NN s s• �in%r,knr N • • .N... • s ,t • • . • c O t t CO et 9 s CO1 V1 It• 00 et 9 s 0`0 V1 5/8"e @ 48" 00 er 9 $ CO V1 BP 00 et 9 BR 0�0 VI 00 er 9 co` 411 ,t N eh O It oo VI ( 5/8"e @24" ] • er N 9 s co` V1 , t er N 9 'BOBS ` erl Its er N 9 oo V7 et N 9 ` er1 O N 9 ` M • %D ... 6 = 141 I k .C4 C ' — -0 _g a O z O z � No ON >= �• Yes Yes Yes 1 � >., >= Yes ] >-. Top/Btm. Plate t P J et t et • t a t er t kD t et t er1 t N t Co • 'et t er1 • N z t� BB N et II et t� ;a, s • N BBB N N N s N t N t N t N . 1111,118111111BROIS MN er V t". er er VP er en N 4D v It en • N Z Naza�O�0033213O38 il y �p ��pp �•pp �•pp �•�pp �p . ••�� y sI it r7`r`rrZI1`Q`f nc5n88Baa.�rissz m , `4Y _ , ,_ 4 , . -• er ep, .r MITCHELL ENGINEERING INC. ,Et.,l/Pd I_ 1 .-.ice.-_, _� _.__�-r!-; . t "....!_:...._...I__1_ —I .—.. — 1140-140th Avenue N. E. , Suite D Bellevue, Washington 98005 206•747-1500`. _;...ti..� _...•�'` r"Y'• -- -- - •�. :•.1.'.._: •--,_ - r rIG/JvL':b� /� i- `i . . I , r ';::-.: _moo v_t, ;,.. ,/_ _: '.. • I -.SOS/ •I.-`i/✓7Se3 X2))4/5.-. ..�.�//&J,ff!O/ �� ._/ .J .r. ...•, ._{_•...._....___ i._::-..._ •-__•_•_• • Zo. • •. :47 -4 L1- i.4.i ~!..•--- __..... _..._ _�� .._,_._._...._... -. _.... _. _tt i 1y• t__ _._i_•••. -(-•_ i : • /_ .. ... • I. 1 1 1.. . ..._ .._. _J. _ : -i • .. ti^"--• 1.:`:_I_`_..� : -:.,. r.-1-:I-4..-:..�; ...._.. ... . , : . : 1 : ....- (_........ ' : `I , , t •--1-II.. .!,•' .t•••••-i _I--r'.r._ Y . . i. ,«:.. ._I-..... 7 - .1. -+ -T�_! i .1 • . I .._ :.... .!. _ j. I _. _.,._I. _. ._ ... .r.I ._...1.;. PREPARED BY M PROJECT S 7/'� SHEET NO. T OF 1015 5 AdE. 4Z— / i f 2/l$ 52 DATE SUBJECT JOB NO. • MITCHELL ENGINEERING INC . =. _ • 1140-140th Avenue N.E., Suite D Bellevue, Washington 98005 206•747-1500 �I/'jJi . _t___ «__1. . : ;- 1_- _. _. __ _ _ .... { -- 4i _ :- i `'-: , i ' 1..__ • PREPARED BY DATE .24;- 7 I • • • I • /6 I • , • •• • . *I • .• • ea • • • . '�• PROJECT SHEET NO. 45. OF L. /s /C15 SUBJECT Z4 4 — s 2J s/ 2 JOB N0, /5697 t cY> 1 lot rr_4 P-4 P-4 1 qt. 6721 7/1c,-* Kxr-ii.J 1,51-1014144r ��G�Co�OG .1kie�rl�bci� Ili tis V. -72 4- 61,04:r fiT��� 14-2s `*l \Af /.4' wA4frW 14,14.-.2 /4r w.*,t,a,Ltwirg,=1 �R-o)•49516f"I 6-4 ..• • A2-4 } 2-4 I/A4, 2-4 P-4 11'1-672Z MICHAEL S. MITCHELL. P.E. MrTCHELL. ENGINEERING, INC. 1140 140th Avenue N.E., Suite 0 • Bellevue. Weehinitan eea05 mom 747-1500 MICHAEL S. MITCHELL, P.E. MITCHELL ENGINEERING, INC. 1140 140th Avenue N.E.. Suite 0 • Bellevue. Washington 9E1005 . . (20S) 747-1M00 PoF FiT —Va4---- skAbi-r4rizkr Co 'ft/ 1=1 7 Tor rE 41: .Weg ex 1141 - IJA*41_ -r, KJ/ icgcl . I (4. Jc2 41c;:c Te› 441 I.4.4 MITCHELL ENGINEERING INC. 1140-140th Avenue N.E., Suite < Bellevue, Washington 980 PREPARED BY PROJECT SHEET NO. I C E Icicle Creek Engineers Geotechnical, Geologic ancf Environmental Services C. Thomas Foster R.A.L. Development and Venture Company 1420 NW Gilman Boulevard, #2206 Issaquah, Washington 98027 August 18, 1998 RECEIVED CITY OFTUKWILA SEP 1 5 1998 PERMIT CENTER Report Geotechnical Consultation Residential Development 5lst Avenue S. and S. 11 lth Street Tukwila, Washington File No. 0133-005 INTRODUCTION This report presents the results of our geotechnical consultation regarding the disposal of roof downspout water on four residential Tots referred to as Lots 7/8, 5/6, 22 and 23/24 of the Pottery Works Addition in Tukwila, Washington. The lots are located northwest of the intersection of 51 st Avenue S. and S. 11lth Street on undeveloped property as shown on the Vicinity Map, Figure 1. Residential ,structures are planned on the subject lots. We understand that the city of Tukwila has indicated that the preferred method of roof downspout water disposal is infiltration. You have requested that we observe the site conditions and provide information, as appropriate, for installation criteria for a downspout drain infiltration system. SCOPE The purpose of our services was to evaluate the shallow soil and ground water conditions as a basis for estimating a soil infiltration rate. The services provided by Icicle Creek Engineers consisted of: 1. Complete a site visit to observe existing site conditions. 2. Excavate four shallow test holes (one on each lot) to a depth of four to six feet. 3. Field classify the grain size distribution of the soil regarding an estimated infiltration rate. 4. Provide recommendations for installation of a roof downspout infiltration system provided that the soil type(s) observed in the test holes are adequate for infiltration. SITE CONDITIONS GENERAL A geotechnical engineer from Icicle Creek Engineers conducted a site visit on August 12, 1998 to perform the geologic reconnaissance and excavate test holes to evaluate shallow subsurface conditions. The test holes were excavated using a shovel, digging bar, post hole digger and extendable hand auger. The property area is shown on the Site Plan, Figure 2. Icicle Creek Engineers, Inc., Meadow Creek Professional Center, 22525 SE 64th Place, Suite 202, Issaquah, Washington 98027 Telephone: (425) 557-4368 Fax: (425) 557-4369 C. Thomas Foster R.A.L Development and Venture Company August 18, 1998 Page 2 SURFACE CONDITIONS The four Tots are located on undeveloped property. From 51st Avenue South, the ground surface across the property area slopes gently to the west for about 100 to 150 feet, then slopes downward at about a 35 to 40 percent grade. The property is partially cleared and vegetated in local areas with dense brush and scattered trees. SUBSURFACE CONDITIONS Local geologic mapping by the U.S. Geological Survey (Waldron, H. H., et al, 1962 — Preliminary Geologic Map of Seattle and Vicinity, Washington) shows that the property area is mantled with "younger gravel." Younger gravel is described as "sand and gravel." Subsurface conditions at the property were evaluated by the excavation of four test holes (one on each lot). The locations of the test holes are shown on Figure 2. Observations of the ground water condition were made as the test holes were excavated. The test holes encountered relatively uniform conditions consistent with regional mapping by the USGS (1964) as previously described. The following is a summary of soil and ground water conditions observed in the test holes: Test Hole TH-1 (Lot 22) 0.0 — 1.5 feet Loose to medium dense fine sand with a trace of gravel 1.5 — 4.0 feet Medium dense fine to medium sand with a trace of gravel Test Hole TH-2 (Lot 23/24) 0.0 — 6.0 feet Loose to medium dense fine to medium sand Test Hole TH-3 (Lot 7/8) 0.0 — 1.0 feet Loose fine to medium sand with scattered roots 1.0 — 4.5 feet Loose to medium dense fine to medium sand Test Hole TH-4 (Lot 5/6) 0.0 — 2.5 feet Loose to medium dense fine to medium sand with a trace of gravel and scattered roots 2.5 — 4.0 feet Medium dense fine to medium sand with a trace of gravel No ground water was observed in the test holes. CONCLUSIONS AND RECOMMENDATIONS We have reviewed standard design methods for disposal of roof downspout drainage using the King County Surface Water Design Manual (Section 4.5.1 Roof Downspout Infiltration Systems). Based on our review of these design methods for infiltration and soil/ground water conditions observed in the test holes, the surficial soils are suitable for infiltration of the proposed roof downspout disposal systems. Based on our visual classification of the soils encountered in the test holes, we recommend that an infiltration rate of 8 inches per hour be used for design of the roof downspout disposal systems at each of the four lots. Icicle Creek Engineers 0133005/081898 C. Thomas Foster R.A.L Development and Venture Company August 18, 1998 Page 3 USE OF THIS REPORT We have prepared this report for R.A.L. Development and Venture Company. When the design has been finalized, we recommend that the final design drawings and specifications be reviewed by our firm to see that our recommendations have been interpreted and implemented as intended. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted practices in this area at the time the report was prepared. No warranties or other conditions, express or implied, should be understood. 311 3It ************* We appreciate the opportunity to provide geotechnical services on this project. If you have any questions'or if we can be of further assistance, please call. EXPIRES i J ' : i - 6 Document ID: 0133005.REP Two copies submitted Yours very truly, Icicle Creek Engineers, Inc. Brian R. Beaman, P.E. Principal Engineer/Geologist Icicle Creek Engineers 0133005/081898. Co al M CO 0 Cr CO El \�; �C ��raa����. r. •_ ...-v �\ \�i741fLz1 \en-�.t7i �s%. Villnilk Amerw 1 �•�•�/A' ire � r RAR:BRB:08/13/98 Base map prowled by R Development and Venture Company 51 st Avenue S. S. 111 th Street 40 80 Approximate Scale in Feet Icicle Creek Engineers Explanation: 4H-1 Test hole location Site Plan - Figure 2 Aug-20-98 02:59P icicle Creek Engineers 206 557-4369 P.O1 Too 'TO m Fo S 20-418 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL 4.5 INFILTRATION SYSTEM ANALYSIS AND DESIGN The specific requirements for the analysis and design of infiltration systems are dependent upon the type of facility. There are three basic types of infiltration systems allowed for use in King County: Roof Downspout Systems, Infiltration Tanks, and Infiltration Ponds. In general, ponds are preferable to tanks because of the ease of maintenance and the water quality treatment that surface soil and vegetation provide. Alternative systems such as small infiltration basins and modular pavement are also allowed, but these methods have many limitations. Requirements for the design of the various types of infiltration systems are presented in the sections which follow. 4.5.1 ROOF DOWNSPOUT INFILTRATION SYSTEMS All roof runoff from lots in new plats and short plats must be either infiltrated or dispersed, or stub - outs to the plat drainage system must be provided. Where lots are less than 22,000 square feet and infiltration is feasible, infiltration is required either on the individual lot or within the plat. If infiltration is not feasible and the dispersion criteria are met, dispersion is allowed (see Section 4.5.6). If infiltration or dispersion is not used, stub -outs shall be provided to connect the roof drains to the plat drainage system. Connections to the stub -outs shall be perforated connections, as described in 4.5.6. Roof downspout infiltration systems are infiltration trench systems intended only for use in infiltrating runoff from roof downspout drains. They are not designed to directly infiltrate any surface water that could transport sediment or pollutants such as from paved areas. Roof downspout systems are required in proposed plats and short plats where there is at least 3 feet of pervious soil above the water table and minimum lot size requirements are met, as detailed below. Where downspout infiltration is used, the roof area which is infiltrated need not be included in the impervious area used to calculate the R/D facility size. Limitations o A single roof downspout infiltration system can serve up to 5,000 square feet of roof area (A,,, described below). o Not allowed on slopes greater than 25% (4:1). o Not allowed in fill materials except in engineered sand and gravel fill, otherwise must be native soil. The placement of the engineered fill must be observed by a qualified representative of a licensed engineer, a geologist or soil scientist, and have a measured infiltration rate of not less than 3 inches per hour. Systems in engineered fill shall be designed using the fine sand criteria in Table 4.1.5B. Infiltration rates shall be tested using the methods described in Section 4.5.2 o Roof downspout systems should be located at Ieast.30 feet from any water supply well. o Limited for use only in the SCS soil types listed in Table 4.5.1A. See Figure 4.5.1A for USDA Soil Texture Triangle. o Minimum lot size requirements shall be as shown in Table 4.5.1A. TABLE 4.5.1A MINIMUM LOT SIZES FOR USE WITH DOWNSPOUT INFILTRATION Soil Texture Class (U.S.D.A.) Minimum Lot Size With Septic System Coarse sand or Cobbles No min 1 acre• No min 12,500 ft=• Medium sand Fine sand, loamy sand 9600 ft2 15,000 ft'• Sandy loam 12,000 ft' 18,000 ft2• Loam _ 15,000 ft2 .5 acre xo• • *. 4.5.1-1 11/94 Aug-20-98 02:59P Icicle Creek Engineers 206 557-4369 P.02 . KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL * On lots >22,000 ft2, dispersion is required. Lots which are too small for infiltration systems shall either disperse the roof runoff (if the requirements in Section 4.5.6 are met) or tie into the proposed plat or short plat storm system. • Typical minimum lot size allowed by Seattle -King County Health Department for gravity septic system in this soil type with 4 feet of original soil. Less than 4 feet of original pervious soil above maximum water table either increases minimum lot size for gravity septic systems to 1 acre for all the above soil types or else it requires the use of a pressure, mound or sand filter system. Coarse sand/gravel sites may be less than .5 acre with the use of a pressure, mound or sand filter system. Check with Seattle -King County Health Department for any changes or for specific site requirements. NOTE: Minimum lot size, required separation between infiltration and septic systems, and distances from water supply wells shall be in accordance with Seattle -King County Health Department requirements, Design Criteria o See Figure 4.5.1 B and Figure 4.5.1C for details. Figure 4.5.1 C applies to sites with coarse sand and cobble soils and is intended to provide additional water quality treatment in these coarse soils. o For roof downspout infiltration systems, a short report must be prepared by suitably trained persons working under the supervision of a licensed Professional Engineer or by • septic system designer licensed by King County, which includes a site sketch and soils logs. The approximate location of the proposed downspout infiltration system and septic system (if applicable) shall be shown on the approved plans. o A minimum of one soils log, minimum 4 feet in depth, that describes the SCS series of the soil, the textural class (as in Table 4.5.1A) of the soil horizon through the depth of the log, and notes any evidence of high groundwater level, such as mottling,, shall be obtained for each proposed roof downspout system location. Note, trench bottoms must be a minimum of 1 foot above seasonal high groundwater level or impervious soil layers. A minimum of 3 feet of pervious soil is required in roof infiltration areas. o Trenches may be located under pavement provided that a small yard drain/catch basin with a grate cover is placed at the end of the trench pipe such that if the trench infiltration capacity is exceeded, the overflow would occur out of the catch basin at an elevation of at least one foot below that of any overlying pavement, and in a location which can accommodate the overflow end meet the requirements of Section 1.2.1. o Minimum spacing between trench center lines shall be 6 feet. o All trenches shall be a minimum of 10 feet from any structure, property line, Native Growth Protection Easement, Sensitive Area Tract or Sensitive Area Setback Area. Trench setbacks from septic systems shall be in accordance with Seattle -King County Health Department requirements. A trench can be located within 10 feet downslope of a structure foundation. Plot plan must show location of all of these features. A copy of the plot plan showing the downspout infiltration system and the other features shall be framed and mounted on a garage wall in the completed structure. o All trenches shall be a minimum of 50 feet from any steep slope (as defined by the Sensitive Areas Ordinance and Rules). This setback may be reduced to 15 feet based on a geotechnical engineering report but in no instances less than the buffer width. o Trench length shall not exceed 100 feet from the inlet sump. o Each trench shall have one observation pipe, that extends to the bottom of the trench, located at a point approximately halfway along the trench length. o Filter fabric shall be placed over the drain rock prior to backfilling. o Infiltration areas shall be clearly marked before site work begins to avoid disturbance of the soil during construction. No vehicle traffic shall be allowed within 10 feet of infiltration trench areas. 4.5.1-2 11/94 Aug-20-98 02:59P Icicle Creek Engineers 206 557-4369 P.03 , KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL o A licensed septic system designer or suitably trained person working under the supervision of a licensed Professional Engineer shall make an inspection of the soil after the system is excavated, before the trenches are filled with rock to confirm that suitable soils are present. Method of Analysis/Length of Roof Downspout Infiltration Trenches The length of trench required is based on the U.S.D.A. soil texture class, the roof area and the site location, using Table 4.5.1B. The length of trench required is determined by dividing the roof area by 1000 and multiplying by the unit length I from the chart for the soil type and multiplying the result by the regional scale factor k shown in Figure 4.5.1 D. The trench length L is computed using the following equation: L = (Am/1000)(1)(k) Where: •A„ = area of the roof tributary to the system, ft2. (Note: a typical single-family residence has a roof area of approximately 2,000 ft2.1 I = the unit length of trench required per 1,000 ft2 of roof area from Table 4.5.18, ft'1 k = the regional scale factor from Figure 4.5.1 D. TABLE 4.5.1E INFILTRATION TRENCH LENGTHS FOR RESIDENTIAL ROOF DOWNSPOUT INFILTRATION SYSTEMS Soil Texture Class (U.S.D.A.) Lineal Feet of Trench per 1000 ft2 of Roof - Sea Tac Lineal Feet of Trench per 1000 ft2 of Roof - Landsburg 1. Coarse sands or Cobbles 15 20 2. Medium sand 25 30 3. Fine send, loamy sand 60 75 4. Sandy loam 100 - 125 5. Loam 150 190 Example: Proposed residence located at Kent East Hill Roof area (AR) = 2,000 square feet; Soil Texture Class = loamy sand; From Table 4.5.1A, 60 ft trench/1000 ft2 of roof, from Figure 4.5.1D k = 1.0 L = (2000/1000)(60)(1.0) = 120 ft (Note: could be accomplished by two trenches). * 4.5.1-3 11/94 2158 Roof Area Total of roof area used to calculate requirements for the infiltration system design for the downspout drains equals 1793 square foot. Infiltration System calculations: L = 1,800sq. ft./ 1,000 (25) (1.0) L = 1,000 = 251f. + 800sq. ft. at 2.5 1.f. per each 100 sq.ft/ L = 251f. + 201f. = 45 lf. Total 451f.=- 2 = 22.5 ( minimum length of each of two required drain lines) INFILTRATION SYSTEM DESIGN PLAN VI)W NO SCALE °RIGID P6RPEPAT£D PIPE PROFILE V[EW NO SCALE 06SERuAT1p01 PIPS, ufFILra WRAP GRALEL cDMPLEre0i won, FILTER FA120►4. 4" RIGID PERFERATaD PIPE WAsHEO site plan LEGAL DESCRIPTION LOT COVERAGE • Pemit• Cozotl. PLAN ItW/ROUTI LIP ACTIVITY NUMBER: D98-0318 DATE: 9-15-98 PROJECT NAME: NAL DEVELOPMENT XX Original Plan Submittal Response to Incomplete. Letter Response to Correction Letter # Revision # After. Permit Is Issued DEPARTMENTS: Building Division Fire Prevention Public Works 121. Structural` Planning Division gPermit Coordinator DETERMINATION OF COMPLETENESS: (Tues, Thurs) DUE DATE: 9-22-98 Complete ❑ Incomplete ❑ Not Applicable ❑ Comments: TUES/THURS ROUTING: Please Route n No further Review Required Routed by Staff ❑ (if routed by staff, make.copy to master file and enter into Sierra) REVIEWERS INITIALS: DATE: APPROVALS OR CORRECTIONS: (ten days) DUE DATE: 10-20-98 Approved ❑ Approved with Conditions ❑ Not Approved (attach comments) ❑ REVIEWERS INITIALS: DATE: CORRECTION DETERMINATION: DUE DATE: Approved ❑ Approved with Conditions ❑ Not Approved (attach comments) ❑ REVIEWERS INITIALS: DATE. \PR•ROUTE.DOC 6/98 ? *.h:k t:ITY OF *A*;*** TRAP18M PaymG •4**01A•W*4 TU1WILA., *A*k*4**4 IT 'Number nt Method Permit No Parcel No Location This .Payment • **A*A"*"A**Ah*,“*tk; %thA*Ah*+.k1*k: A*A+**.k*k*}*h WA TRfNIiii)T' *:k *:k:1*:k*******hA*AkAh*h:1•:1•*h:k4.h;k•k**•k'AkAk:t**•A P9700832. Amount: 1.07 .46 09/J6/98 10:37 CHECC Notation: C THOMca, FOSTER *Emit: 13LH : D98-0318 •rvoe: IiEVPEUtI •DEVELOPMENT PERMIT 68742E-10E;5 : 50 AV ti. LOTS 5-8 Total Fees: 2,734.51 1.0.7a.46 Total ALL Pmts. 1.1.075.46 Balance1.b59.05 •**A o%*Ak*•*A A*olA•k*•..A&**A**d*** 4:i•*•h*****A*AttA•1.**** (ccount Code I)escr i pt i on 000/345...830 PLAN CHECK - RES. ,Amount, 1.„G7;.4'. INFOPAC PAGE: 16,410 S JOB PAM200 KING COUNTY DEPARTMENT OF ASSESSMENTS sA. RT?P'AGE_`t'z :225'; REPORT PAM20030-02 PARCEL NUMBERS BY TAXPAYER NAME ODAT407/05'/98"% CITY OF TUKWILA TAXPAYER PARCEL -NUMBER SITUS ADDRESS / QTR-SEC-TWP-RGE RADTKE LYNN M RADU DORIN S+ETELKA RAFATJAH I RAIFSNIDER DELORES RAINBOW ASSOCIATES LTD RAINES V SIDNEY RAISBECK JAMES D RAISBECK JAMES D+SHERRY L RAJWANSHI DESHDEEPAK S+HARI • RAL DEVELOPMENT&VENTURE CO 6 RAL DEVELOPMENT&VENTURE CO • RAL DEVELOPMENT&VENTURE CO RALDEVELOPMENT&VENTURE CO_ RAL DEVELOPMENT&VENTURE CO RAL DEVELOPMENT&VENTURE CO • RAL DEVELOPMENT&VENTURE CO RAMELS BRADLEY G RAMEY CHARLES E+MARION L RAMEY REGGIE R 814140-0520-0 15100 SUNWOOD BL LOT: UNIT 14 BLOCK: C SE-23-23-4 PLAT: SUNWOOD PHASE I 017900-0615-0 12235 45TH AV S LOT: 33-34 BLOCK: 3 SE-10-23-4 PLAT: ALLENTOWN ADD 017900-1250-0 0 LOT: 27-28 BLOCK: 6 SE-10-23-4 PLAT: ALLENTOWN ADD • 734660-0135-0 13322 MILITARY RD S LOT: 3 BLOCK: 4 NE-16-23-4 PLAT: RIVERTON ACRE TRS 022310-0033-0 401 EVANS BLACK DR LOT: 3 BLOCK: NE-26-23-4 PLAT: ANDOVER INDUSTRIAL PARK NO. 02 186520-0160-0 15310 SUNWOOD BL LOT: UNIT F1-202 BLOCK: PLAT: CRYSTAL RIDGE 032304-9034-0 4411 S RYAN WY 032304-9050-0 0 004100-0240-0 14929 42ND AV S LOT: 18-19 BLOCK: 2 PLAT: ADAMS HOME TRS 1ST ADD SE-23-23-4 SE-3 -23-4 SE-3 -23-4 NW-22-23-4 687420-1040-0 0 LOT: 1 & 2 BLOCK: 10 SE-3 -23-4 PLAT: POTTERY WORKS ADD 687420-1045-0 0 51ST AV S LOT: 3 & 4 BLOCK: 10 SE-3 -23-4 PLAT: POTTERY WORKS ADD SE-3 -23-4 687420-1050-0 LOT: 5 & 6 PLAT: POTTERY 0 BLOCK: WORKS ADD 10 68742010650 0.51ST AV S t" LOT, 7" & 8 +BLOCK Q� SE-3 -23-4 '.PLAT •POTTERY WORKS ADD: SE-3 -23-4 687420-1143-0 0 LOT: 21 PLAT: POTTERY WORKS BLOCK: ADD 10 687420-1144-0 0 LOT: 22 BLOCK: 10 SE-3 -23-4 PLAT: POTTERY WORKS ADD 687420-1160-0 0 51ST AV S LOT: 25 & 26 BLOCK: 10 SE-3 -23-4 PLAT: POTTERY WORKS ADD 217200-0070-0 13055 56TH AV S LOT: 14 BLOCK: NW-14-23-4 PLAT: EAST RIVERTON GARDEN TRS 2ND 335140-0505-0 4104 S 114TH ST LOT: 7-8-9 BLOCK: 24 NW-10-23-4 PLAT: HILLMANS CD MEADOW GARDENS DIV NO. 03 334740-0360-0 4206 S 122ND ST LOT: 66 BLOCK: 2 SE-10-23-4 PLAT: HILLMANS CD MEADOW GARDENS DIV NO. 01 .