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HomeMy WebLinkAboutReport 1XXXX-XX XXX ' ' ' ' I ' ' ' ' r-----, ozvv 1 I I 1- " c => ~ w • ""' z i2"' ... w"' ~~ m<D I \'.'~ ~~~ .. < ... !z t;;: i>: ~ 01 •oo 08 :~i5 zoo 0 • 0 S, I '-z z "-~._o 0 i tJ.,,e • "' ~~ ::I ~o • <'i z l ~Is I /:~ i u~ I t @ ~! ~ii .. I rr ,~rr ! ! ' I ; -- :l • r~ emfs-!~ :0 I l BHC Consultants, LLC 1601 Fifth Avenue, Suite 500 Seattle, WA 98101 206.505.3400 206.505.3406 (fax) www.bhcconsultants.com ~l ' ' w z ~ I Cl . ClJ o1 Rent 0 PIBnn,nq [)ivisl n MAY 1 ll '/0\i Neighborhood Detail Map NE 10th SVAnacortes Ave NE Detention Pond Retrofit City of Renton May2013 . ......_ ___ _ Figure 1 ~ ~ ~ - "' '" .. .. ~ - TOP OF Oim1HTION """''· ~~---, ' SliCTION SCM..l!lr••~ 1'•11'V ffi ~ Ta> Of Pi;TENTICN : ::: ~:-,'\~--~~---------:,------.-~-. .,. -.. = :1 • r~ cits-I~ ~1111.0PE, - 8HC CC>n5Ultlonl>I, LLC l201'1II0,._8'hUoo ___ ......... ------- SECTION OCH..le'l"• ... H ruv [= ·-. ffi ~ ~ ~lJl!I. .. TAEATMOOY'Ot.UIE. a .. ~ : ,:111 '" "' -.. . : 385 ~ "' '" -.. - --,. r....- t!; l:::' "" I MTE I lll'f'II -~ -. -,., I;:;.";. I --® ~ CITY OF RENTON -~·11<-Dof,t. Cit'l ol Renton P\.~)r,11\n9. 0\'j\s\on \Iii\ 1 ; ~ 'l_ll\'i ~ \~~ ((;; ~ \\\!/~;IQ) CAU. 3 WORKING DAYS BEFORE YOU DIG 1-800-424-5555 CITY OF RENTON NE 10th ST/ANACORTES AVE NE DETENTION PONO RETROFIT SECTIONS CITY OF RENTON DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT MEMORANDUM Date: July 17, 2013 To: City Clerk's Office From: Stacy M Tucker Subject: Land Use File Closeout Please complete the following information to facilitate project closeout and indexing by the City Clerk's Office. .,.,,,.,.,,~ ........ ,i .-"'-·· ... .-..... _. Project Name: LUA (file) Number: Cross-References: AKA's: Project Manager: Acceptance Date: Applicant: Owner: Contact: PIO Number: NE 10th/Anacortes Ave NE Detention Pond Retrofit LUA-13-000605, ECF Rocale Timmons May 29, 2013 Allen Quynn, City of Renton City of Renton Same as applicant 1023059434 ;------------------------------------ : ERC Decision Date: June 24, 2013 ERC Appeal Date: July 12, 2013 Administrative Denial: , Appeal Period Ends: Public Hearing Date: Date Appealed to HEX: By Whom: HEX Decision: , Date Appealed to Council: By Whom: Council Decision: Mylar Recording Number: Date: Date: Project Description: The applicant, the City of Renton, is requesting Environmental (SEPA) Review in order to retrofit an existing detention pond into a combined detention/water quality pond in order to improve water quality downstream, Location: 4526 NE 10th Street & Anacortes Avenue NE ,, Comments: ,,.-------~---_.-...... ·--··-------~-,~>IE.--'~-N ____ ..... , ... ,O A,C••c~,,>.,<•',t>,>,,•,••'' r r Denis Law s ,... ~ City of/ 1 --=Mavoc------~ I ,j /i': ,··r··· .• . r/( r, .... •r.\ ... ~J ... r .... f_ ... 1 ..... ,1 _, . ..,..,,, ....,,,.. ---.,,.,,. d--,-,,,- July 17, 2013 Allen Quynn City of Renton 1055 S Grady Way Renton, WA 98057 Department of Community and Economic Development C.E. "Chip" Vincent, Administrator SUBJECT: . th NE 10 / Anacortes Ave NE Detention Pond Retrofit LUAB-000605, ECF Dear Mr. Quynn: This letter is to inform you that the appeal period ended July 12, 2013 for the Environmental Review Committee's (ERC) Determination of Non-Significance for the above-referenced project. No appeals were filed on the ERC determination therefore, this decision is final and application for the appropriately required permits may proceed. If you have any · questions, please feel free to contact me at (425) 430-7219. For the Environmental Review Committee, ~~ :~~i Planner Renton City Hall • 1055 South Grady Way • Renton, Washington 98057 • rentonwa.gov STATE OF WASHINGTON, COUNTY OF KING } AFFIDAVIT OF PUBLICATION PUBLIC NOTICE Linda M Mills, being first duly sworn on oath that she is the Legal Advertising Representative of the Renton Reporter a weekly newspaper, which newspaper is a legal newspaper of general circulation and is now and has been for more than six months prior to the date of publication hereinafter referred to, published in the English language continuously as a weekly newspaper in King County, Washington. The Renton Reporter has been approved as a Legal Newspaper by order of the Superior Court of the State of Washington for King County. The notice in the exact form annexed was published in regular issues of the Renton Reporter (and not in supplement form) which was regularly distributed to its subscribers during the below stated period. The annexed notice, a: Public Notice was published on June 28, 2013. The full amount of the fee charged for said foregoing publication is the sum or $91.00. .-;:" . ;c, ):;;/ ">,,,,; ;,,,.;a:t-&.( v1 ,.......-""'z~.1 < {.,i11da M. Mills Legal Advertising Representative, Renton Reporter Subscribed and sworn to me this 28th day of June, 2013. \ fja" 'f-j;_ w a () Siu,)_ nUL ,,._ Kathleen C. Sherman, Notary Public for the State of Washington, Residing in Buckley, Washington ,,,,,,,{\,~il\1111111 $' 'E-~ €. 81-t, "•,, g-~<:::, ~'''''"'"'111 <$-L\ ,,, .: ,-<:' ""'''<;,SION s-1!•,( ~ 1 11 -...... -==--~ 1.()// ~ /,, :::."(° ~,.,_.. 0\A,~ ;.,:It 7 ~ E ~ ffo ~ J-~; :t. ~ i ~o -. -(I)~ ~ ,:.. i E ~ ~1.() Ci::::= ~ <f>~ Us\..\: : <? E '/: ".,),.'I. A !""-.: 0 -~ _ ,,,, .,.,79_\v $,t.,;. :' 1, , >,. 1,1 ~,, r,. - 111 (!" lh\\\\\,,,s• ~v :;:" ,,,,, O;: vvAs\A' ,.,,~.;::- 1111 \\ \\\\\\'\'-'-'''''"" 'iOTICF. OF ENVIRONMENTAL DETER~IINATIO'i ENVIRONMENTAL Rl:vrnw COMMITHE RE'iTO'i, WASHINGTON The Environmental Review Committee has issued a Determi- nation of NonSignificanec (DNS) for the following project under the authority of the Renton mu- nicipal code. NE l 0th St / Anacortes Ave NF. Detention Pond Retrofit LUAl3000605 Location: NE 10th St & Ana- cortes Ave NE. The applicant is requesting SEPA Review in order to retrofit an existing dc- Lentmn pond into a combined detention/water quality pond The I. 12 acre site is located on the north side on NE I 0th St between Anacortes Ave NE and Chelan Ave NE in the R8 zone. There are no critical ar- eas on site Appeals of the DNS must be filed in writing on or hefore 5:00 p.m. 011 July 12, 2013 Appeals must be filed in writing together with the required tee with: Hearing h:aminer c/o City Clerk, City of Renton, 1055 S Grady Way. Renton, WA 98057. Appeals to the Hearing Examiner arc governed by RMC 481 JO and more infommtion may be obtained from the Renton Citv Clerl.;'s Office, 4254306510. - Published 111 the Rcncon Reporter on June 28.2013. #816364 , "'< _. c~_ty _o~J \ _____ ., . . ~· ------------JL' ,·01r1t'1r1·n\1n1\ •-;. --:.!> ~1,SL~ ._;;,U~U ' , , NJOTICE OF ENVIRONMENTAL DETERMINATION ISSUANCE OF A DETERMINATION OF NON-SIGNIFICANCE (DNS} POSTED TO NOTIFY INTERESTED PERSONS OF AN ENVIRONMENTAL ACTION PROJECT NAME: NE 10"' S1/Anaau1esAVe NE D~ention Pond Retrofit PROJECTNIJMBER: LUA13-00UM15, ECF, SME lOCATION· 4n6 NE 10'" Stree! DESCRIPll~N-The 1ppllcant, the City of R•nton, 1, requ11tlnJ E,wtronmental (SEPAi R....,ltiw In on:l•r to ,,;roflt ,n Hlsilng d~entlon p0nd Into I tamblntd detenlk,n/waw quollty por.d In ordor to lmprO\le -..ater quallty downstream. The 1.12 acn, di• Is loa~ on th• north slM on NE 10th St betw,,1n An1torte, Av• NE and Chll!lln Ave NE. Thi site Is located within tt.. Aaldentlal~ rJu/ac [R·B) zonlns de•ICN1tion. Rltl.l'Ofinlng the pond would n,qulre the •=ntlon of L.SOO cubk yard• ol ,all, to be h,,uh1d off itte. Th•ro are no crttlcal •re•• on •lie. There 1, a Cu•iorv 2 -tland loc:obld Jun north ol th• detention pond. No work VI propos•d within th• w•tland or It• buff•r. TI-IE CITY Of RENTON ENVIRONMENTAL REVIEW COMMITTEE lERC) HAS DETERMINED TI-IAT THE PROPOSED ACTION DOES NOT HAVE A 51GNIFICANT ADV!:R5E IMPACT ON THE ENVIRONMENT. Appeals of the &nvlronmental determination murt be flied In wrlt!nc on or before 5:00 p.m, on July 12, 20U toaether with the required lee with: Hearlnc Eumlner, City of Renton, 1055 South Gn,dy Way, Rent;,.,, WA 98057. Appeals to !he Ei<amlner •re governed by Oty ,of IIMC 4-3-110 ;>nd Information r,,,gardlnE 1he ,1ppHI proces• m:iy be obt•ln,d from the Renton Qty Clerks Office, {425) 430•6510. IF THE ENVIRONMENTAL DETERMINATION IS APPEALED, A PUBLIC HEARING WILL BE SET ANO All PARTIES NOTIFIED. PLEASE INCLUDE THE PROJECT NUMBER WHEN CALLING FOR PROPER FILE IDENTIFICATION. FOR FURTHER INFORMATION PLEASE CONTACT THE CITY OF RENTON, DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT AT{42S)430-7200. DO NOT REMOVE THIS NOTICE WITHOUT PROPER AUTHORIZATION CERTIFICATION I, fJ'/ ,? / (' Ti/)1 ;J1 t11 / . hereby certify that 3 copies of the above document were posted in _;'J conspicuous places or nearby the described property on u,pf' /J 3 Signed: l)(/c.-1L ~41{,tlCdL"'j(/ / Date: STATE OF WASHINGTON COUNTY OF KING ) ) ss ) I certify that I know or have satisfactory evidence that K" eccl t T.' m ,no.0' signed this instrument and acknowledged it to be his/her/their free and voluntary act for the uses and purposes mentioned in the instrument. J{ .A ~v€,pl Dated: Notary Public in ~ for the State of Washington CITY OF RENTON DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT -PLANNING DIVISION AFFIDAVIT OF SERVICE BY MAILING On the 27th day of June, 2013, I deposited in the mails of the United States, a sealed envelope containing ERC Determination documents. This information was sent to: Name Agencies Allen Quynn -City of Renton (Signature of Sender): STATE OF WASHINGTON COUNTY OF KING ) ) 55 ) Representing See Attached Owner/Applicant/Contact "'""'""''h ,:-'°''' GRAe)'11 ,, ~ it-,· !ti,'''""1\1111 lfi;'~ ,,, ff ~-,.=-.:-~N e..-_!~'1~ \ ~ § o'fA,1'>-~\ ~ ,,.. ; + -~ ~ ,:. ~u -• -~ := ,. .,,,. ... z .... I certify that I know or have satisfactory evidence that Stacy M. Tucker ~ 111 \ .. ., • .._,'-j o § signed this instrument and acknowledged it to be his/her/their free and voluntar{1c~,F,llii2Qe'l.~9!fposes · • · I;: A' •1,111"''''''"' ~ -mentioned m the instrument. \ · (!' 0,: ~s~ # . IJf W,... ,,,...._ 1111111""'''" Dated: (l,,a,1 :ri ,;)C(;, ----"jc.o( ... ,"""A.._ .... rJ..,·'""~'"",""'L.,.c.._,, .... , ------------,1 7 Notary Public in and for the State of Washington Notary (Print): ___ _,_L..<."'--....._ ...... '"""'..._--------------- My appointment expires: . NE 10'h St/Anacortes Ave NE Detention Pond Retrofit Project Name:'··· ' • ,! ,-,,,;; • -............. ' •,,J .·: ..,.:_ ,, 'I!<):{ fl,.:~;.·:_ u,·•~·.,':<-1-··.l!": ::: '.fJ!reJ!~!.~~~ LUA13-000605, ECF, SME template -affidavit of service by mailing Dept. of Ecology ** Environmental Review Section PO Box47703 Olympia, WA 98504-7703 WSDOT Northwest Region • Attn: Ramin Pazooki King Area Dev. Serv., MS-240 PO Box 330310 Seattle, WA 98133-9710 US Army Corp. of Engineers * Seattle District Office Attn: SEPA Reviewer PO Box C-3755 Seattle, WA 98124 Boyd Powers * Depart. of Natural Resources PO Box47015 Olympia, WA 98504-7015 KC Dev. & Environmental Serv. Attn: SEPA Section 900 Oakesdale Ave. SW Renton, WA 98055-1219 Metro Transit Senior Environmental Planner Gary Kriedt 201 South Jackson Street KSC-TR-0431 Seattle, WA 98104-3856 Seattle Public Utilities Real Estate Services Attn: SEPA Coordinator 700 Fifth Avenue, Suite 4900 PO Box 34018 Seattle, WA 98124-4018 AGENCY {DOE) LETTER MAILING (ERC DETERMINATIONS) WDFW -Larry Fisher* 1775 12th Ave. NW Suite 201 Issaquah, WA 98027 Duwamish Tribal Office* 4717 W Marginal Way SW Seattle, WA 98106-1514 KC Wastewater Treatment Division * Environmental Planning Supervisor Ms. Shirley Marroquin 201 S. Jackson ST, MS KSC-NR-050 Seattle, WA 98104-3855 City of Newcastle Attn: Steve Roberge Director of Community Development 13020 Newcastle Way Newcastle, WA 98059 Puget Sound Energy Municipal Liaison Manager Joe Jainga PO Box 90868, MS: XRD-01 W Bellevue, WA 98009-0868 Muckleshoot Indian Tribe Fisheries Dept. * Attn: Karen Walter or SEPA Reviewer 39015 -172"' Avenue SE Auburn, WA 98092 Muckleshoot Cultural Resources Program* Attn: Ms Melissa Calvert 39015 172nd Avenue SE Auburn, WA 98092-9763 Office of Archaeology & Historic Preservation* Attn: Gretchen Kaehler PO Box 48343 Olympia, WA 98504-8343 City of Kent Attn: Mr. Fred Satterstrom, AICP Acting Community Dev. Director 220 Fourth Avenue South Kent, WA 98032-5895 City of Tukwila Steve Lancaster, Responsible Official 6200 Southcenter Blvd. Tukwila, WA 98188 *Note: If the Notice of Application states that it is an "Optional DNS", the marked agencies and cities will need to be sent a copy of the Environmental Checklist, Site Plan PMT, and the Notice of Application. **Department of Ecology is emailed a copy of the Environmental Checklist, Site Plan PMT, & Notice to the following email address: sepaunit@ecy.wa.gov template • affidavit of service by mailing OF ENVIRONMENTAL DETERMINATION ISSUANCE OF A DETERMINATION OF NON-SIGNIFICANCE (DNS) POSTED TO NOTIFY INTERESTED PERSONS OF AN ENVIRONMENTAL ACTION PROJECT NAME: NE 101h St/Anacortes AVe NE Detention Pond Retrofit LUAB-000605, ECF, SME PROJECT NUMBER: LOCATION: 4526 NE 101h Street DESCRIPTION: The applicant, the City of Renton, Is requesting Environmental (SEPA) Review in order to retrofit an existing detention pond into a combined detention/water quality pond in order to improve water quality downstream. The 1.12 acre site is located on the north side on NE 10th St between Anacortes Ave NE and Chelan Ave NE. The site is located within the Residential-8 du/ac (R-8) zoning designation. Retrofitting the pond would require the excavation of 1,500 cubic yards of soils to be hauled off site. There are no critical areas on site. There ls a Category 2 wetland located just north of the detention pond. No work is proposed within the wetland or its buffer. THE CITY OF RENTON ENVIRONMENTAL REVIEW COMMITIEE (ERC) HAS DETERMINED THAT THE PROPOSED ACTION DOES NOT HAVE A SIGNIFICANT ADVERSE IMPACT ON THE ENVIRONMENT. Appeals of the environmental determination must be flied in writing on or before 5:00 p.m. on July 12, 2013, together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by City of RMC 4-8-110 and information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425} 430-6510. IF THE ENVIRONMENTAL DETERMINATION IS APPEALED, A PUBLIC HEARING WILL BE SET AND ALL PARTIES NOTIFIED. FOR FURTHER INFORMATION, PLEASE CONTACT THE CITY OF RENTON, DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT AT (425) 430-7200. DO NOT REMOVE THIS NOTICE WITHOUT PROPER AUTHORIZATION PLEASE INCLUDE THE PROJECT NUMBER WHEN CALLING FOR PROPER FILE IDENTIFICATION. June 27, 2013 Allen Quynn City of Renton 1055 S Grady Way Renton, WA 98057 Department of Community and Economic Development C.E. "Chip" Vincent, Administrator SUBJECT: ENVIRONMENTAL THRESHOLD (SEPA) DETERMINATION NE 10'h St/Anacortes Ave NE Detention Pond Retrofit, LUAB-000605, ECF, SME Dear Mr. Quynn: This letter is written on behalf of the Environmental Review Committee (ERC) to advise you that they have completed their review of the subject project and have issued a threshold Determination of Non-Significance. Please refere to the enclosed ERC Report and Decision for more details. Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on July 12, 2013, together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by RMC 4-8-110 and more information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425) 430-6510. If the Environmental Determination is appealed, a public hearing date will be set and all parties notified. If you have any questions or desire clarification of the above, please call me at (425) 430-7219. For the Environmental Review Committee, '(J.~- Senior Planner Enclosure Renton City Hall • 1055 South Grady Way • Renton, Washington 98057 • rentonwa.gov Denis Law Mayor June 27, 2013 Washington State Department of Ecology Environmental Review Section PO Box 47703 Olympia, WA 98504-7703 --rt/~ C.ity?t l[\ ( · .. ·r, . ·.· .. r.··· ... ,.\• •.. ~J r l \. ·.···.,,./ \. \. ; '· (~, ·~~.~~.,~--~ ',""1/IK;' ·':d'.~,, .. ,,_; Department of Community and Economic Development C.E. "Chip" Vincent, Administrator Subject: ENVIRONMENTAL (SEPAi THRESHOLD DETERMINATION Transmitted herewith is a copy of the Environmental Determination for the following project reviewed by the Environmental Review Committee (ERC) on June 24, 2013: SEPA DETERMINATION: Determination of Non-Significance {DNS} PROJECT NAME: NE 101h St/ Anacortes Ave NE Detention Pond Retrofit PROJECT NUMBER: LUA13-00060S, ECF, SME Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on July 12, 2013, together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by RMC 4-8-110 and information regarding the appeal process may be obtained from the City Clerk's Office, (425) 430-6510. Please refer to the enclosed Notice of Environmental Determination for complete details. If you have questions, please call me at (425) 430-7219. Enclosure cc: King County Wastewater Treatment Division Boyd Powers, Department of Natural Resources Karen Walter, Fisheries, Muckleshoot Indian Tribe Melissa Calvert, Muckleshoot Cultural Resources Program Gretchen Kaehler, Office of Archaeology & Historic Preservation Ramin Pazooki, WSDOT, NW Region Larry Fisher, WDFW Duwamish Tribal Office US Army Corp. of Engineers Renton City Hall • 1055 South Grady Way • Renton, Washington 98057 • rentonwa.gov DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT DETERMINATION OF NON-SIGNIFICANCE (DNS) ADVISORY NOTES PROJECT NUMBER: LUA13-000605, ECF APPLICANT: Allen Quynn, City of Renton PROJECT NAME: NE 10th St/Anacortes Ave NE Detention Pond Retrofit PROJECT DESCRIPTION: The applicant, the City of Renton, is requesting Environmental (SEPA) Review in order to retrofit an existing detention pond into a combined detention/water quality pond in order to improve water quality downstream. PROJECT LOCATION: NE and Chelan Ave NE LEAD AGENCY: ADIVISORY NOTES: North side on NE 10th St between Anacortes Ave City of Renton Environmental Review Committee Department of Community & Economic Development The following notes are supplemental information provided in conjunction with the administrative land use action. Because these notes are provided as information only, they are not subject to the appeal process for the land use actions. Planning: 1. RMC section 4-4-030.C.2 limits haul hours between 8:30 am to 3:30 pm, Monday through Friday unless otherwise approved by the Development Services Division. The Development Services Division reserves the right to rescind the approved extended haul hours at any time if complaints are received. 2. Within thirty (30) days of completion of grading work, the applicant shall hydroseed or plant an appropriate ground cover over any portion of the site that is graded or cleared of vegetation and where no further construction work will occur within ninety (90) days. Alternative measures such as mulch, sodding, or plastic covering as specified in the current King County Surface Water Management Design Manual as adopted by the City of Renton may be proposed between the dates of November 1st and March 31st of each year. The Development Services Division's approval of this work is required prior to final inspection and approval of the permit. 3. Commercial, multi-family, new single-family and other nonresidential construction activities shall be restricted to the hours between seven o'clock (7:00) a.m. and eight o'clock (8:00) p.m., Monday through Friday. Work on Saturdays shall be restricted to the hours between nine o'clock {9:00) a.m. and eight o'clock {8:00) p.m. No work shall be permitted on Sundays. 4. The applicant shall erect and maintain six foot (6') high chain link temporary construction fencing around the drip lines of all retained trees, or along the perimeter of a stand of retained trees. Placards shall be placed on fencing every fifty feet (SO') indicating the words, "NO TRESPASS! NG -Protected Trees" or on each side of the fencing if less than fifty feet (SO'). Site access to individually protected trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addition, the applicant shall provide supervision whenever equipment or trucks are moving near trees. ERC Advisory Notes Page 2 of 2 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT ENVIRONMENTAL (SEPA) DETERMINATION OF NON-SIGNIFICANCE (DNS) PROJECT NUMBER: LUA13-000605, ECF APPLICANT: Allen Quynn, City of Renton PROJECT NAME: NE 10th St/Anacortes Ave NE Detention Pond Retrofit PROJECT DESCRIPTION: The applicant, the City of Renton, is requesting Environmental (SEPA) Review in order to retrofit an existing detention pond into a combined detention/water quality pond in order to improve water quality downstream. PROJECT LOCATION: LEAD AGENCY: North side on NE 10th St between Anacortes Ave NE and Chelan Ave NE City of Renton Environmental Review Committee Department of Community & Economic Development The City of Renton Environmental Review Committee has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21C.030(2)(c). This Determination of Non-Significance is issued under WAC 197-11-340. Because other agencies of jurisdiction may be involved, the lead agency will not act on this proposal for fourteen (14) days. Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on July 12, 2013. Appeals must be filed in writing together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by RMC 4-8-110 and more information may be obtained from the Renton City Clerk's Office, (425) 430-6510. PUBLICATION DATE: DATE OF DECISION: SIGNATURES: Terry Higashiyama, Administrator Community Services Department June 28, 2013 June 24, 2013 r' lzc/}t3 Date ~/-a..:-t \ \) Date Fire & Emergency Services C£ JL--sf C.E. "Chip" Vincent, Administrator Department of Community & Economic Development DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT TO: FROM: MEETING DATE: TIME: LOCATION: ENVIRONMENTAL REVIEW COMMITTEE MEETING AGENDA Gregg Zimmerman, Public Works Administrator Terry Higashiyama, Community Services Administrator Mark Peterson, Fire & Emergency Services Administrator C.E. "Chip" Vincent, CED Administrator Jennifer Henning, Current Planning Manager Monday, June 24, 2013 3:00 p.m. Sixth Floor Conference Room #620 THE FOLLOWING IS A CONSENT AGENDA NE 31st Street Culvert Replacement {Roca/e Timmons) LUA13-000598, ECF, SME Location: 2224 NE 31" Street. Description: Application for SEPA Review and Shoreline Exemption in order to remove and ,replace an existing storm system which conveys May Creek under NE 31st St. Adjacent land use consists of single-family residences within the Resource Conservation (RC) and Residential -1 du/ac (R-8) zones .. NE10th St/Anacortes Ave NE Detention Pond Retrofit (Roca/e Timmons) LUA13-000605, ECF Location: 4800 Block of Smithers Avenue S. Description: The applicant is requesting SEPA Review in order to retrofit an existing detention pond into a combined detention/water quality pond. The 1.12 acre site is located on the north side on NE 10th St between Anacortes Ave NE and Chelan Ave NE in the R-8 zone. There are no critical areas on site. cc: D. Law, Mayor J. Covington, Chief Administrative Officer D. Jacobson, Deputy PW Administrator-Transportation C. Long, Economic Development Director• N. Watts, Development Services Director• L. Warren, City Attorney • Phil Olbrechts, Hearing Examiner D. Pargas, Assistant Fire Marshal• J. Medzegian, Council DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT ENVIRONMENTAL REVIEW COMMITTEE REPORT ERC MEETING DA TE: Project Name: Project Number: Project Manager: Owner: Applicant/Contact: Project Location: Project Summary: Site Area: STAFF RECOMMENDATION: June 24, 2013 NE 10th St/ Anacortes Ave NE Detention Pond Retrofit LUA13-000605,ECF Roca le Timmons, Senior Planner City of Renton; 1055 South Grady Way; Renton, WA 98057 Allen Quynn; City of Renton; 1055 South Grady Way; Renton, WA 98057 Parcel #102305-9129 The applicant, the City of Renton, is requesting Environmental (SEPA) Review in order to retrofit an existing detention pond into a combined detention/water quality pond in order to improve water quality downstream. The 1.12 acre site is located on the north side on NE 10th St between Anacortes Ave NE and Chelan Ave NE. The site is located within the Residential-8 du/ac (R-8) zoning designation. Retrofitting the pond would require the excavation of 1,500 cubic yards of soils to be hauled off site. There are no critical areas on site. There is a Category 2 wetland located just north of the detention pond. No work is proposed within the wetland or its buffer. 49,036 SF Total Building Area GSF: N/A Staff Recommends that the Environmental Review Committee issue a Determination of Non-Significance (DNS). Project Location Map ERC Report City of Renton Deportment of Community & Economic Development NE 10'" ST/ ANACORTES AVE NE DETENTION PONO RETROFIT Environmental Review Committee Report LUA13·000605, £CF Report of June 24, 2013 Page2of5 PART ONE: PROJECT DESCRIPTION/ BACKGROUND The project would involve the retrofitting of an existing detention pond into a combined detention/water quality pond. The site is located on the north side of NE 10th St between Chelan Ave NE and Anacortes Ave NE on a City owned parcel. Adjacent land uses consists of single-family residences within the Residential - 8 du/ac (R-8) zone. The existing detention pond was constructed in 2004 to provide regional detention of runoff in order to reduce the frequency and severity of flooding in NE 10th St, Anacortes Ave NE, and Anacortes Ct NE. The project aims to improve water quality downstream. The retrofitted pond would provide water quality treatment from an 18 acre upstream tributary. The pond is rectangular in shape and is situated near a toe of a slope extending up to the east. The pond is surrounded by chain link fencing. Access to the pond is gained from NE 10th St. The project includes excavation of the water quality treatment volume, construction of a berm, and removal of an existing baffle wall. The existing outlet pipe would be replaced with a new outlet pipe and manhole located at the north end of the pond to improve hydraulic efficiency. Retrofitting the pond would consist of excavating approximately 1,500 cubic yards of material to a depth of about 8 feet to create additional area for water quality storage volume. The detention volume would not be affected. The new pond would be approximately 14-feet deep with 3:1 side slopes. The graded storage volume would occupy an area of approximately 10,600 square feet. Approximately 200 cubic yards of soil may be placed as backfill for the new outlet piping. There is a Category 2 wetland located just north of the detention pond. The City of Renton requires a SO- foot buffer for Category 2 wetlands. No work is proposed within the wetland or its buffer. No trees are proposed to be removed. The project is expected to commence in September 2013 and all work to be completed in November of 2013. Construction activities would take place during the hours of 7:00 am and 5:00 pm Monday through Friday. On May 30, 2013, the City received comments from a neighboring property owner (Exhibit 6). The comments include concerns for wildlife who occupy the pond. I PART TWO: ENVIRONMENTAL REVIEW In compliance with RCW 43.21C.240, the following environmental (SEPA) review addresses only those project impacts that are not adequately addressed under existing development standards and environmental regulations. A. Environmental Threshold Recommendation Based on analysis of probable impacts from the proposal, staff recommends that the Responsible Officials: Issue a DNS with a 14-day Appeal Period. ERCReport City of Renton Department of Community & mic Development vironmental Review Committee Report LUA13-000605, ECF NE 10'" ST/ ANACORTES AVE NE DETENTION rvND RETROFIT Report of June 24, 2013 Page3of5 B. Exhibits Exhibit 1 Exhibit 2 Exhibit 3 Exhibit 4 Exhibit 5 Exhibit 6 Zoning Map Site Plan Aerial Photo Geotechnical Report, prepared by Kleinfelder, dated May 9, 2013 Technical Information Report, dated May 7, 2013 Public Comments, dated May 30, 2013 C. Environmental Impacts The Proposal was circulated and reviewed by various City Departments and Divisions to determine whether the applicant has adequately identified and addressed environmental impacts anticipated to occur in conjunction with the proposed development. Staff reviewers have identified that the proposal is likely to have the fallowing probable impacts: 1. Earth Impacts: The new pond would be approximately 14-feet deep including detention volume with 3:1 side slopes. The detention volume would not be affected. Retrofitting the pond would consist of excavating approximately 1,500 cubic yards of material to a depth of about 8 feet to create additional area for water quality storage volume. The graded storage volume would occupy an area of approximately 10,600 square feet. Approximately 200 cubic yards of soil may be placed as backfill for the new outlet piping. A 2-foot high retaining wall along the east side of the pond may be considered along the east side of the pond depending on further evaluation of construction costs. No new impervious surfaces are proposed. Approximately 2.5 percent (1,200 square feet) of detention pond site is covered with an existing asphalt access road and pad will remain so as part of this project. The applicant submitted a Geotechnical Report, prepared by Kleinfelder, dated May 9, 2013. The applicant will be required to design a Temporary Erosion and Sedimentation Control Plan {TESCP) pursuant to the 2009 King County Surface Water Design Manual Erosion and Sediment Control Requirements. Mitigation Measures: No additional mitigation is required. Nexus: Not applicable. 2. Water Impacts: Stormwater runoff into the pond comes from the existing storm system in NE 101 " St, which serves the areas east of the pond. Discharge from the pond would continue to go into the existing system in NE 101h St. The existing system runs about 1,700 feet to the north in NE 11th Pl and Whitman Ct NE. The discharge eventually connects to a culvert in Whitman Ct that Honey Creek flows into Honey Creek then flows into May Creek which flows into Lake Washington. The existing pond has a detention volume of 82,600 cubic feet and was originally constructed to improve water quality downstream and detain up to the 25-year return period storm event. The retrofit project would be done in accordance with the 2009 King County Surface Water Design Manual. ERCReport City of Renton Department of Community & Economic Development NE 10'" ST/ ANACORTES AVE NE DETENTION POND RETROFIT Report of June 24, 2013 Mitigation Measures: No additional mitigation is required. Nexus: Not applicable. 3. Animals Environmental Review Committee Report LUA13-000605, ECF Page 4 of 5 Impacts: According to comments received water fowl currently inhabits the pond including juvenile ducks (Exhibit 6). The juvenile ducks were born in the spring of this year and currently cannot fly. They are expected to start flying mid-summer before construction begins in· September. There is also a Muscovy duck that lives in the pond. Although the Muscovy duck is domesticated, it is still capable of flying and has been observed flying out of the pond. Once the contractor begins to dewater the pond in preparation for excavation, the ducks, including the Muscovy are likely to fly away to another open water body such as another nearby pond or Lake Washington. If, for some reason, there are any ducks that are unable to fly when construction begins, the applicant has indicated it would take the appropriate action necessary to provide a safe environment for the ducks. Mitigation Measures: No additional mitigation is required. Nexus: Not applicable. D. Comments of Reviewing Departments The proposal has been circulated to City Department and Division Reviewers. Where applicable, their comments have been incorporated into the text of this report and/or "Advisory Notes to Applicant." ,/ Copies of all Review Comments are contained in the Official File and may be attached to this report. The Environmental Determination decision will become final if the decision is not appealed within the 14-day appeal period (RCW 43.21.C.075(3); WAC 197-11-680). Environmental Determination Appeal Process: Appeals of the environmental determination must be filed in writing together with the required fee to: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057, on or before 5:00 p.m. on July 12, 2013. RMC 4-8-110 governs appeals to the Hearing Examiner and additional information regarding the appeal process may be obtained from the City Clerk's Office, Renton City Hall -7'h Floor, (425} 430-6510. ADVISORY NOTES TO APPLICANT The following notes are supplemental information provided in conjunction with the administrative land use action. Because these notes are provided as information only, they are not subject to the appeal process for the land use actions. Planning: 1. RMC section 4-4-030.C.2 limits haul hours between 8:30 am to 3:30 pm, Monday through Friday unless otherwise approved by the Development Services Division. The Development Services Division reserves the right to rescind the approved extended haul hours at any time if complaints are received. 2. Within thirty (30) days of completion of grading work, the applicant shall hydroseed or plant an appropriate ground cover over any portion of the site that is graded or cleared of vegetation and where no further construction work will occur within ninety (90) days. Alternative measures such as mulch, sodding, or plastic covering as specified in the current King County Surface Water Management Design Manual as adopted by the City of Renton may be proposed between the dates of November 1st and March 31st of each yeijr. The Development Services Division's approval of this work is required prior to final inspection and approval of the permit. ERCReport City of Renton Department of Community & mic Development NE 10'" ST/ ANACORTES AVE NE DETENTION rvND RETROFIT Report of June 24, 2013 vironmental Review Committee Report LUA13-000605, £Cf Page 5 of 5 3. Commercial, multi-family, new single-family and other nonresidential construction activities shall be restricted to the hours between seven o'clock (7:00) a.m. and eight o'clock (8:00) p.m., Monday through Friday. Work on Saturdays shall be restricted to the hours between nine o'clock (9:00) a.m. and eight o'clock (8:00) p.m. No work shall be permitted on Sundays. 4. The applicant shall erect and maintain six foot (6') high chain link temporary construction fencing around the drip lines of all retained trees, or along the perimeter of a stand of retained trees. Placards shall be placed on fencing every fifty feet (SO') indicating the words, "NO TRESPASSING -Protected Trees" or on each side of the fencing if less than fifty feet (SO'). Site access to individually protected trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addition, the applicant shall provide supervision whenever equipment or trucks are moving near trees. ERCReport t:! .... f-1 f-1 ; z R-8 "'> "' ~ 1:1', = I Ill f-1 R-8 CA ZONING MAP BOOK PW TECHNICAL SERVICES PRINTED ON 11/13/09 n,,,_..,,..,,,. • .,.,,.,,.,..,"'""'"""' ll'"'"""d!O>U"""IIC<•rK\'-ond~ .... dOO ""'""' "'"'""'""' v.,,~ ..... .,, , .... ""'··_.,, ""'""'""'""d<dfoec,.,.01,p11yl"',IK""°""· 2 (- 1 . ,. ~, . D6 -03 T23N R5E W 1/2 M-F • MEm,sr u~---- R-8 WE1ot,PI R-8 R-14 ~ .. - CA R-10 ' • R-14 ) CA CA Slc112tti81 RM-F R-8 R-8 R-8 ~~7=:::=,.~,~-,----~l'--J~ R-8 RM-F CA ! ; ' ' t ! i ~ R-8 R-8 R-8 R-8 N EXHIBIT 1 --CA---; '----CA---L---~' t F6 -15 T23N R5E W 1/2 E6 D 200 H+J 400 I Feet 10 T23N RSE W 1/2 1:4,800 5310 22N R4E RESIDENTIAL [5IJ (RC) Resource Conservation ~ (R-1) Residential 1 du/ac 8 (R-4) Residential 4 du/ac ~ (R-8) Residential 8 du/ac ~ (RMH) Residential Manufactured Homes I R-10 I (R-10) Residential 10 du/ac B (R-14} Residential 14 du/ac I RtHI (RM-F} Residential Multi-Family §i] (RM-T) Residential Multi-Family Traditional I RM-u I (RM-U) Residential Multi-Family Urban Center MIXED l!_SE (_ENTERS @J (CV} Center Village luc-r-11 (UC-Nl) Urban Center-North 1 [u.i:.:N--5 (UC-N2) Urban Center-North 2 ~ (CD) Center Downtown COMMERCIAL ~ (CCR) Commercial/Office/Residential ~ (CA) Commercial Arterial ~ (CO) Commercial Office [IN-] (CN) Commercial Neighborhood 35 T23N R5E--36 833 :. " 1T2 INDUSTRIAL ~ (IL) Industrial -Light ~i (IM) Industrial -Medium Q (IH) Industrial· Heavy ---Renton City Limits -·--Adjacent City Limib KROU PAGE PAGE# INDEX SECT/TOWN/RANGE XXXX-XX XXX ' ' ' ' ' ' ' I \ \ ' ' ,--, Cc 0 _Q 'E .!! SI 2. a:O Cl 0~ ?;' ~ ·-[l. 0 I ! • • - r I 207 0 104 207 Feet WGS_ 1984_ Web_Mercator_Auxiliary_Sphere Aerial Photo EXHIBIT 3 Information Technology -GIS RentonMapSupport@Rentonwa.gov 06/18/2013 This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. THIS MAP IS NOT TO BE USED FOR NAVIGATION Legend Jurisdiction Boundaries [J other O City of Renton D Parcels fa Floodway • FEMA Flood Zones Environment Designations • Natural • Shoreline High Intensity D Shoreline Isolated High Intensity • Shoreline Residential 63 Urban Conservancy D Jurisdictions Notes None 0 1: 2,490 CityofRe11tone Finance & IT Division ~ ( KLEINFELDER ~ Bright Peopfe. Right Sofutions. May 9, 2013 Kleinfelder Project No. 134216 BHC Consultants Attention: Mr. Jeff Kreshel, P .E. 1601 Fifth Avenue Suite 500 Seattle, WA 98101 ' Subject: Geotechnical Review , Detention Pond Retrofit Project · NE 101h Street and Anacortes Avenue NE Renton, Washington Dear Mr. Kreshel: c·t , Yot Rento Pl?.nnir,g lY . n '·.. 1v1sio11 This letter presents our comments on geotechnical aspects of the proposed NE 10th Street and Anacortes Avenue NE Detention Pond Retrofit Project in Renton, Washington. Project Understanding In preparation for this work, we reviewed selected pond as-built drawings; the geotechnical report by CH2M Hill dated October, 2001; and the conceptual design memo by BHC Consultants dated May 6, 2013. We understand the pond modifications are designed in accordance with the 2009 King County Surface Water Design Manual (KCSWDM). The pond site is located in a groundwater protection area. The pond site is in a residential area in the Renton Highlands. The pond is roughly rectangular in shape with long dimension running north/south; it is situated near the toe of a slope extending up to the east. The pond site is surrounded by chain link fencing. Access to the pond is from NE 10th Street with a short pavement apron entrance and locked gate. A "berm" is oriented north/south along the west side of the detention pond and is relatively flat at approximate Elevation 414 feet (reference elevation datum NAVO 88). The ground surface elevation along the top edge of the east pond side slope is at Approximate Elevation 424 feet. According to the as-built plans, the pond bottom is relatively flat at approximate Elevation 406 feet. The existing pond side slopes are typically inclined 3H:1V (horizontal:vertical). The proposed pond modifications will involve deepening the pond by 8 feet to bottom Elevation 398 feet. Within the deepened portion of the pond, the excavation side slopes 134216/SEA13L0208 Copyright 2013 Kleinfelder 14710 NE 87• Street, Suit EXHIBIT 4 May 9, 2013 1 f J 425.636. 7901 / :l • r~ cdslt:~ ' TECHNICAL MEMORANDUM City of Renton Planning Division Date: 5/7/2013 To: Allen Quynn, P.I;:. City of Renton ~tf-., . ~ Peter Cunningham, P.E./Jeff Kreshel, P.E{ BHC Consultants CC: Ron Straka., P.E'. Subject: City of Renton Water Quality Pond Sizing Analysis and Conceptual Design City of Rentop NE 10th Street and Anacortes AVenUe NE Detention Pond Retrofit Project No: 13-10291.01 1. Introduction MAY I S Ml The purpose of the NE 10th Street and Anacortes Avenue NE o·etention Pond Retrofit Project (Retrofit Project) is to improve water quality downstream of the pond by converting it into a combined detention and wa.ter quality pond. The existing pond is located near the intersection of NE 10th Street and Anacortes Avenue NE in the City bf Renton, WA as shown tfh Figure 1. The existing pond, with a detenti'on volume of 82,600 cubic feet (cf), was originally constructecl to alleviate flooding issues in the area. The pone! was sized to detain 11p to the 25-year return period storm event. The existing pond includes inlet and outlet piping, a flow restrictor, baffle walls to increase the flow path, two emergency overflows, an access road, site fencing, and a bypass in NE 10th Street that allows flow to bypass the pond during maintenance. The existing detention pond and surrounding site conditions are depicted on F(gure 2. EXHIBIT 5 Rocale Timmons From: Sent: To: Cc: Subject: Robert Key <robertkey@iinet.com> Thursday, May 30, 2013 1:25 PM Rocale Timmons Don Persson Land Use Number -LUAB-000605 To: City of Renton Planning Department, Roca le Timm ions From: Robert and Rosemary Key Subject: Comments about land use LUA13-000605. We would like to make the City of Renton Planning Department aware of our concerns for the wildlife that now call the pond home. In particular we would like to know what the city plans are to relocate any young duck that can not fly out on their own. Also, there is a Muscovy duck that have been living in the pond for the past two years. His flying abilities are limited as he is in reality a domestic duck that was put in the pond to fiend for himself. Robert and Rosemary Key 1008 Anacortes Ave NE Renton, WA 98059 425 271-1968 EXHIBIT 6 City of. __ ,_ton Department of Community & Economic Development ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT: -~) COMMENTS DUE: JUNE 12, 201i APPLICATION NO: LUAB-000605, ECF DATE CIRCULATED: MAY 28, 2013 T -n -'---'-='--'-'-=-'-=-=.:...::::::..c:..:..:===----------------1----=====-=---c=..:....:.:..::..c....::=-===---=------.- APPLICANT: City of Renton -Allen Quynn PROJECT MANAGER: Rocale Timmons;:;; PROJECT TITLE: NE 10th St/ Anacortes Ave NE Detention Pond Retorfit SITE AREA: 49036 square feet EXISTING BLDG AREA (gross): LOCATION: 4526 NE 10'" Street PROPOSED BLDG AREA (gross) N/A :<;0~ ~ SUMMARY OF PROPOSAL: The applicant, the City of Renton, is requesting Environmental (SEPA) Review in or~~\~~o~ an existing detention pond into a combined detention/water quality pond in order to improve water quality do~~am. The 1.12 acre site is located on the north side on NE 10th St between Anacortes Ave NE and Chelan Ave NE. The site is located within the Residential-8 du/ac (R-8). Retrofitting the pond would require the excavation of 1,500 cubic yards of soils to be hauled off site. There are no critical areas on site. There is a Category 2 wetland located just north of the detention pond. No work is proposed within the wetland or its buffer. A. ENVIRONMENTAL IMPACT (e.g. Non-Code} COMMENTS Element of the Probable Probable Mo,e Environment Minor Major Information Impacts Impacts Necessary Element of the Probable Probable Mare Environment Minor Major Information Impacts Impacts Necessary Earth Housino Air Aesthetics Water Linht/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transnortation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation Airport Environment 10,000Feet 14,000Feet /iv; /0 8. POLICY-RELATED COMMENTS C. CODE-RELATED COMMENTS ~ au av~f)c:u,/:s m ~h- We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas where additional information is needed to properly assess this proposal. ~~eQ &i1~ l,e-3-/3 Signature of Director or Authorized Representative Date • CITY OF RENTON DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT -PLANNING DIVISION AFFIDAVIT OF SERVICE BY MAILING On the 29th day of May, 2013, I deposited in the mails of the United States, a sealed envelope containing Acceptance Letter, Notice of Application, Environmental Checklist, Reduced Site Plan documents. This information was sent to: Name Representing Agencies See Attached Allen Quynn -City of Renton Owner/ Applicant/Contact 300' Surrounding Property Owners See attached (Signature of Sender): Alb I • J rt1 d{ J/ Ju-, "''""""'''' -~""-1,, -,, u ff . p... ~"''~~ ''" STATE OF WASHINGTON ) f ~~q:..'i) \ ) SS :: ; 'T +o~"-'~ ,: ~ ~ #U It i COUNTY OF KING ) ~ j :. ' -:; 1 ~ ~ t "•"'" z :: I i "V t~ 6'.29."1~ !-.0 : I certify that I know or have satisfactory evidence that Stacy M. Tucker ~i ~~,,,.,11,. ~c, § signed this instrument and acknowledged it to be his/her/their free and voluntary '!!,j,119~ ~ purposes mentioned in the instrument. 11 ''"'"""''''" Dated: !/J},"J J,q 1 JL i,7 Notaryublic in and for the State of Washington Notary (Print): ___ .... -~-'--';tC....--"G-'-c""clc>"'-. -"--------------- My appointment expires: Project Name: NE lO'h / Anacortes Detention Pond Retrofit Project Number: LUA13-000605, ECF template . affidavit of service by mailing Dept. of Ecology** Environmental Review Section PO Box 47703 Olympia, WA 98504-7703 WSDOT Northwest Region * Attn: Ramin Pazooki King Area Dev. Serv., MS-240 PO Box 330310 Seattle, WA 98133-9710 US Army Corp. of Engineers* Seattle District Office Attn: $EPA Reviewer PO Box C-3755 Seattle, WA 98124 Boyd Powers * Depart. of Natural Resources PO Box 47015 Olympia, WA 98504-7015 KC Dev. & Environmental Serv. Attn: SEPA Section 900 Oakesdale Ave. SW Renton, WA 98055-1219 Metro Transit Senior Environmental Planner Gary Kriedt 201 South Jackson Street KSC-TR-0431 Seattle, WA 98104-3856 Seattle Public Utilities Real Estate Services Attn: SEPA Coordinator 700 Fifth Avenue, Suite 4900 PO Box 34018 Seattle, WA 98124-4018 AGENCY (DOE) LETIER MAILING (ERC DETERMINATIONS) WDFW -Larry Fisher* Muckleshaot Indian Tribe Fisheries Dept. * 1775 12th Ave. NW Suite 201 Attn: Karen Walter or SEPA Reviewer Issaquah, WA 98027 39015 -172"0 Avenue SE Auburn, WA 98092 Duwamish Tribal Office * Muckleshoot Cultural Resources Program * 4717 W Marginal Way SW Attn: Ms Melissa Calvert Seattle, WA 98106-1514 39015 172"d Avenue SE Auburn, WA 98092-9763 KC Wastewater Treatment Division * Office of Archaeology & Historic Preservation* Environmental Planning Supervisor Attn: Gretchen Kaehler Ms. Shirley Marroquin PO Box 48343 201 S. Jackson ST, MS KSC-NR-050 Olympia, WA 98504-8343 Seattle, WA 98104-3855 City of Newcastle City of Kent Attn: Steve Roberge Attn: Mr. Fred Satterstrom, AJCP Director of Community Development Acting Community Dev. Director 13020 Newcastle Way 220 Fourth Avenue South Newcastle, WA 98059 Kent, WA 98032-5895 Puget Sound Energy City of Tukwila Municipal Liaison Manager Steve Lancaster, Responsible Official Joe Jainga 6200 Southcenter Blvd. PO Box 90868, MS: XRD-OlW Tukwila, WA 98188 Bellevue, WA 98009-0868 *Note: If the Notice of Application states that it is an "Optional DNS", the marked agencies and cities will need to be sent a copy of the Environmental Checklist, Site Plan PMT, and the Notice of Application. **Department of Ecology is emailed a copy of the Environmental Checklist, Site Plan PMT, & Notice to the following email address: sepaunit@ecy.wa.gov template -affidavit of service by mailing BRONTE HOMES LLC 1133 164TH ST SW #105 LYNNWOOD, WA 98087 LUONG KHAI+CHINH NGOC DINH 966 BREMERTON CT NE RENTON, WA 98059 SAWYER STEPHEN+ROBIN C PO BOX 2018 RENTON, WA 98056 ERSKINE IAN K 1032 ANACORTES AVE NE RENTON, WA 98059 ROBERTS DIANA K PO BOX 3415 RENTON, WA 98056 PILLO LINDA TRUSTEE 5411 36TH AVE SW SEATTLE, WA 98126 FISHER SHERRIE M 1045 CHELAN AVE NE RENTON, WA 98059 MORAN KENNETH G+ANNA C 4526 NE 10TH ST RENTON, WA 98059 KLANSNJC PAUL+HEIDI 981 NE CHELAN CT RENTON, WA 98059 BOUN PHANNY 19617 12TH AVE W LYNNWOOD, WA 98036 LANE JAMIE A+BOBBI C 958 BREMERTON CT NE RENTON, WA 98059 TUNG ERIC W 1024 ANACORTES AVE NE RENTON, WA 98059 NGO MINH & PHAN PHAN 962 ANACORTES AVE NE RENTON, WA 98059 KIHLMAN ROBERT C+SHERI L 11608 137TH AVE SE RENTON, WA 98059 VICENTE KHENDEE E 1021 CHELAN AVE NE RENTON, WA 98059 SDC HOMES LLC 310 29TH ST NE SUITE 200 PUYALLUP, WA 98372 CHEN CHUN+HONG ZHOU+CHEN AN 4124 NE 22ND ST RENTON, WA 98059 CHEVAOSOT VECHAYANT 11610 137TH AVE SE RENTON, WA 98056 BROCK JAMES K 950 BREMERTON CT NE RENTON, WA 98055 GOODE VICTORIA L 1016 ANACORTES AVE NE RENTON, WA 98059 KEY R 1008 ANACORTES NE RENTON, WA 98059 MARTIN LUTHER KING JR BAPTISH CHURCH PO BOX 2145 RENTON, WA 98055 TURCHIN AMMARA 1027 CHELAN AVE NE RENTON, WA 98059 THAM! ABDERRAHMANE+MAURA E 11425 137TH AVE SE RENTON, WA 98056 TANG OSCAR+SUSIE 975 CHELAN CT NE RENTON, WA 98059 NOTICE OF APPLICATION AND PROPOSED DETERMINATION OF NON-SIGNIFICANCE-MITIGATED (DNS-M) A Master Application has been filed and accepted with the Department of Community & Economic Development {CEO)-Planning Division of the City of Renton. The following briefly describes the application and the necessary Public Approvals. DATE OF NOTICE OF APPLICATION: LAND USE NUMBER: PROJECT NAME: May 29, 2013 LUA13-000605, ECF NE 10th St/ Anacortes Ave NE Detention Pond Retorfit PROJECT DESCRIPTION: The applicant, the City of Renton, is requesting Environmental (SEPA) Review in order to retrofit an existing detention pond into a combined detention/water quality pond in order to improve water quality downstream. The 1.12 acre site is located on the north side on NE 10th St between Anacortes Ave NE and Chelan Ave NE. The site is located within the Residential-8 du/ac {R-8). Retrofitting the pond would require the excavation of 1,500 cubic yards of soils to be hauled off site. There are no critical areas on site. There is a Category 2 wetland located just north of the detention pond. No work is proposed within the wetland or its buffer. PROJECT LOCATION: 4526 NE 101 h Street OPTIONAL DETERMINATION OF NON-SIGNIFICANCE, MITIGATED (DNS-M): As the lead Agency, the City of Renton has determined that significant environmental impacts are unlikely to result from the proposed project. Therefore, as permitted under the RCW 43.21C.110, the City of Renton is using the Optional DNS-M process to give notice that a DNS- M is likely to be issued. Comment periods for the project and the proposed ONS-M are integrated into a single comment period. There will be no comment period following the issuance of the Threshold Determination of Non- Significance-Mitigated (DNS-M). A 14-day appeal period will follow the issuance of the DNS-M. PERMIT APPLICATION DATE: NOTICE OF COMPLETE APPLICATION: APPLICANT/PROJECT CONTACT PERSON: Permits/Review Requested: Other Permits which may be required: Requested Studies: Location where application may be reviewed: PUBLIC HEARING: CONSISTENCY OVERVIEW: Zoning/Land Use: May 13, 2013 May 28, 2013 Allen Quynn, City of Renton; 1055 S Grady Way; Renton, WA 98057; Eml: aquynn@rentonwa.gov Environmental (SEPA) Review Construction Permit Drainage Report, Geotechnical Report Department of Community & Economic Development (CEO) -Planning Division, Sixth Floor Renton City Hall, 1055 South Grady Way, Renton, WA 98057 N/A The subject site is designated Residential Single Family (RSF) on the City of Renton Comprehensive Land Use Map and Residential -8 (R-8) on the City's Zoning Map. !f you would like to be made a party of record to receive further information on this proposed project, complete this form and return to: City of Renton, CED-Planning Division, 1055 So. Grady Way, Renton, WA 98057. Name/File No.: NE 10th St/ Anacortes Ave NE Detention Pond Retorfit/LUAB-000605, ECF NAME:------------------------------------ MAILING ADDRESS: ________________ City/State/Zip:----------- TELEPHONE NO.: --------------- Environmental Documents that Evaluate the Proposed Project: Development Regulations Used For Project Mitigation: Environmental (SEPA) Checklist The project will be subject to the City's SEPA ordinance, RMC4-2-110A and other applicable codes and regulations as appropriate. Comments on the above appllcation must be submitted in writing to Rocale Timmons, Senior Planner, CED-Plannlng Division, 1055 South Grady Way, Renton, WA 980S7, by S:00 PM on June 12, 2013. If you have questions about this proposal, or wish to be made a party of record and receive additional notification by mail, contact the Project Manager. Anyone who submits written comments will automatically become a party of record and will be notified of any decision on this project. CONTACT PERSON: Rocale Timmons, Senior Planner; Tel: (425) 430-7219; Eml: rtimmons@rentonwa.gov I PLEASE INCLUDE THE PROJECT NUMBER WHEN CALLING FOR PROPER FILE IDENTIFICATION I May 29, 2013 Allen Quynn City of Renton· Utilities 1055 S Grady Way Renton, WA 98057 • Department of Community and Economic Development C.E. "Chip" Vincent, Administrator Subject: Notice of Complete Application NE 10th St/ Anacortes Ave NE Detention Pond Retorfit LUA13·000605, ECF Dear Mr. Quynn: The Planning Division of the City of Renton has determined that the subject application is complete according to submittal requirements and, therefore, is accepted for review. It is tentatively scheduled for consideration by the Environmental Review Committee on June 24, 2013. Prior to that review, you will be notified if any additional information is required to continue processing your application. Please contact me at (425) 430-7219 if you have any questions. Ti;,;~ Senior Planner Renton City Hall • 1055 South Grady Way • Renton, Washington 98057 • rentonwa.gov City of Renton LAND USE PERMIT MASTER APPLICATION ·, :, __ ' ·. ,· ' ' PROPERTY OWNER(S) PROJECT INFORMATION NAME: City Of Renton PROJECT OR DEVELOPMENT NAME: NE 10th St/ Anacortes Ave NE Detention Pond ADDRESS: 1055 South Grady Way Retrofit Project PROJECT/ADDRESS(S)/LOCATION AND ZIP CODE: CITY: Renton, WA ZIP:98055 City owned property at approx. 1361 O NE 1 o'" Street. TELEPHONE NUMBER: (425) 430-7247 KING COUNTY ASSESSOR'S ACCOUNT NUMBER(S): APPLICANT (if other than owner) 102305 9129 (City Owned Property) NAME: Allen Quynn, Project Manager EXISTING LAND USE(S): City owned Stormwater Detention Pond COMPANY (if applicable): City Of Renton, Surface Water Utility PROPOSED LAND USE(S): ADDRESS: 1055 South Grady Way City Owned Stormwater Detention/Water Quality Pond EXISTING COMPREHENSIVE PLAN MAP DESIGNATION: CITY: Renton, WA ZIP:98055 Residential Single Family TELEPHONE NUMBER (425) 430-7247 PROPOSED COMPREHENSIVE PLAN MAP DESIGNATION (if applicable): NA CONTACT PERSON EXISTING ZONING: Residential (Renton R-8) NAME: Same as above PROPOSED ZONING (if applicable): NA COMPANY (if applicable): SITE AREA (in square feet): Pond Property -49,036 sf SQUARE FOOTAGE OF ROADWAYS TO BE DEDICATED FOR SUBDIVISIONS OR PRIVATE STREETS SERVING ADDRESS: THREE LOTS OR MORE (if applicable): NA CITY: ZIP: PROPOSED RESIDENTIAL DENSITY IN UNITS PER NET ACRE (if applicable): NA TELEPHONE NUMBER AND E-MAIL ADDRESS: NUMBER OF PROPOSED LOTS (if applicable): NA (425) 430-7247 aquynn@rentonwa.us H:\File Sys\SWP -Surface Water Projects\SWP-27 -Surface Water Projects (CIP)\27-3645 NE 10th-Anacortes RD Pond Retrofit\Pennits\Master Application I .doc p JECT INFORMATION (cont ed) NUMBER OF NEW DWELLING UNITS (if applicable): none PROJECT VALUE: Approx. $200,000 NUMBER OF EXISTING DWELLING UNITS (if applicable): None IS THE SITE LOCATED IN ANY TYPE OF ENVIRONMENTALLY CRITICAL AREA, PLEASE INCLUDE SQUARE FOOTAGE (if applicable): SQUARE FOOTAGE OF PROPOSED RESIDENTIAL BUILDINGS (if applicable): NA SQUARE FOOTAGE OF EXISTING RESIDENTIAL BUILDINGS TO REMAIN (if applicable): NA SQUARE FOOTAGE OF PROPOSED NON-RESIDENTIAL BUILDINGS (if applicable): NA SQUARE FOOTAGE OF EXISTING NON-RESIDENTIAL BUILDINGS TO REMAIN (if applicable): NA NET FLOOR AREA OF NON-RESIDENTIAL BUILDINGS (if applicable): NA NUMBER OF EMPLOYEES TO BE EMPLOYED BY THE NEW PROJECT (if applicable): NA D AQUIFER PROTECTION AREA ONE D AQUIFER PROTECTION AREA TWO D FLOOD HAZARD AREA D GEOLOGIC HAZARD D HABITAT CONSERVATION D SHORELINE STREAMS AND LAKES D XX WETLANDS LEGAL DESCRIPTION OF PROPERTY Attach le al description on separate sheet with the followin information included 3,070 SITUATE IN THE NW 1/4 QUARTER OF SECTION 10 TOWNSHIP 23N , RANGE SE THE CITY OF RENTON, KING COUNTY, WASHINGTON. TYPE OF APPLICATION & FEES List all land use applications being applied for: 1. SEPA Review 3. i2. 4. Staff will calculate applicable fees and postage: $ 1,030.00 AFFIDAVIT OF OWNERSHIP sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. IN I, (Print Name/s) -~--'-------'~---=---=-,_,__,_)1'--"''-'----' declare that I am (please check one) ~ the current owner of the property involved in this application or the authorized representative to act for a corporation (please attach proof of authorization) and that the foregoing statements and answers herei ntained and the information herewith are in all respects true and correct to the best of my knowledge and belief. I certify that I know or have satisfactory evidence that Q ( \ ~ N (-, u. U '-/ [',.J, ~ signed this instrument and acknowledged it to be his/her/their free and voi:nfary act for thh uses and purposes mentioned in the instrument. (Signature of Owner/ (Signature of Owner/Representative) My appointment expires: I (:::, -\ "'\ -\ ',- H:\File Sys\SWP -Surface Water Projects\SWP-27 -Surface Water Projects (CIP)\27-3645 NE 10th-Anacortes RD Pond Retrofit\Pennits\Master Application! .doc PROJECT NARRATIVE NE 10TH ST and ANACORTES AVE NE DETENTION POND RETROFIT PROJECT The project involves retrofitting an existing detention pond into a combined detention/water quality pond to improve water quality downstream of the pond. The existing detention pond was constructed in 2004 to provide regional detention of runoff in order to reduce the frequency and severity of flooding in NE 10th St, Anacortes Ave. NE, and Anacortes CT NE. The existing pond will be retrofitted to provide water quality treatment for stormwater runoff from an 18 acre upstream tributary area. The existing stormwater detention pond resides on a 1.12-acre parcel owned by the City of Renton Surface Water Utility and is located on the north side of NE 1 o'h St. midway between Anacortes Ave NE and Chelan Ave NE. Retrofitting of the detention pond will consist of excavating approximately 1500 CY of material to a depth of about 8 feet to create the water quality storage volume. The graded storage volume will occupy an area of approximately 10,600 SF. The existing outlet pipe will be replaced with a new outlet pipe and manhole located at the north end of the pond to improve hydraulic efficiency. An earthen berm will be constructed to divide the waler quality portion of the pond into 2 treatment cells. The project site as well as adjacent areas are zoned R-8 and consists of single family subdivisions as well as single lot residential homes, a high school baseball and football field, and a church. The tributary basin also incorporates impervious areas including parts of Duvall Ave. NE and NE 1 o'h Street. A City of Renton designated Category 2 wetland is located just north of the detention pond property. The Category 2 wetland area within 100 feet of the property line was measured at 1,033 sf. No work will occur in the wetland or the wetland buffer area. The soils are generally common forms of glacial till and are typically silly sands. They are classified as Alderwood Gravelly Sandy Loam (AgC) and Arenls-Alderwood Material (AmC). The detention pond site drains from east to west. The estimated construction cost of the combined detention/water quality pond is $200,000 Chy o1 Renton Plar111ing Division H:\File Sys\SWP -Surface Water Projects\SWP-27 -Surface Water Projects (CIP)\27-3645 NE 10th-Anacortes RD Pond Retrofit\Permits\Project Narrative.doc Page 1 CONSTRUCTION MITIGATION DESCRIPTION NE 10TH ST/ ANACORTES AVE NE DETENTION POND AND STORM SYSTEM IMPROVEMENT PROJECT Proposed Construction Dates: Construction is anticipated to begin in September 2013 and be completed in November 2013. If there are delays in design and permitting, construction may occur in the summer of 2014. Hours of Operation: Monday through Friday between 7:00 AM and 5:00 PM. Work on weekends is not expected. If work on weekends becomes necessary, it will require approval from the City Project Manager. Proposed Hauling/Transportation Routes: The contractor will probably use 1-405, SR-900/Sunset Blvd NE, or NE 3rd/4th ST to reach the general vicinity of the site and Union Ave NE, Duvall Ave NE/SE 138th Ave, and NE 10th ST/SE 116th ST to reach the construction site location. The contractor will be required to file a Traffic Control Plan with the City to identify the hauling routes and traffic control measures for the construction area. SE 116th St, NE 10th ST, Anacortes Ave NE, NE 11th ST, and Whitman CT will probably be limited to one lane while construction is occurring in those streets. Access to local driveways will be maintained, except when construction actually needs to cross a driveway. Measures to Minimize Impacts Erosion control measures such as storm drain inlet protection and silt fences per the City adopted 2009 King County Surface Water Manual will be used. Any soil stockpiles not in use will be covered with plastic sheets during rainy periods. If dust conditions develop, the contractor will be required to use a water truck to reduce blowing dust. All construction equipment will be required to have muffler and exhaust systems in good working order. Contractor will be required to maintain spill response kits onsite at all times. City f P O Renton lann,n.-. -y . " I. /vision MAY.!-~ MJ H:\File Sys\SWP -Surface Water Projects\SWP-27 -Surface Water Projects (CIP)\27-3645 NE 10th- Anacortes RD Pond Retrofit\Permits\Project Constr Mitigate.doc DEVELOPMENT SERVICES DIVISION ENVIRONMENTAL CHECKLI~~;- City of Renton Development Services Division 1055 South Grady Way, Renton, WA 98055 Phone: 425-430-7200 Fax: 425-430-7231 PURPOSE OF CHECKLIST: ;0 ,,a .. - !I')J 1¢. (('' Jr:: The State Environmental Policy Act (SEPA), Chapter 43.21C RCW, requires all governmentaf"~,Ycf.s:!tJJ consider the environmental impacts of a proposal before making decisions. An Environmental lmpacr'' Statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. INSTRUCTIONS FOR APPLICANTS: This environmental checklist asks you to describe some basic information about your proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or "does not apply". Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. USE OF CHECKLIST FOR NONPROJECT PROPOSALS: Complete this checklist for nonproject proposals, even though questions may be answered "does not apply." IN ADDITION, complete the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). For nonproject actions (actions involving decisions on policies, plans and programs), the references in the checklist to the words "project," "applicant," and "property or site" should be read as "proposal," "proposer," and "affected geographic area," respectively. H;File Sys\SWP-27-2266\01 \1300\0I\020709c-SEPA CHKlist v 23.doc\DWC\tb 05/10/13 A. BACKGROUND 1. Name of proposed project, if applicable: NE 10th Street and Anacortes Avenue NE Detention Pond Retrofit 2. Name of applicant: City Of Renton Surface Water Utility 3. Address and phone number of applicant and contact person: Allen Quynn, Project Manager, Surface Water Utility 1055 South Grady Way Renton, WA 98055 425-430-7247 4. Date checklist prepared: May 2013 5. Agency requesting checklist: City of Renton Surface Water Utility 6. Proposed timing or schedule (including phasing, if applicable): Construction in Summer/Fall 2013. Construction may also occur in summer 2014 if it is not possible to design, permit, and build the water quality pond in 2013. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. Wetland Delineation and Classification Report -October 2001 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. None known. 10. List any governmental approvals or permits that will be needed for your proposal, if known. SEPA 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. The purpose of the NE 10th Street and Anacortes Avenue NE Detention Pond Retrofit Project (Retrofit Project) is to improve water quality downstream of the pond by converting C:\Documents and Settingslaquynn\Local Settings\T emporary Internet Files\Content.Outlook\O l J8DPP2\SEP A 2 Checklist -5-6-2013.doc 05/10/13 an existing detention pond into a combined detention and water quality pond. The existing pond is located near the intersection of NE 10th Street and Anacortes Avenue NE in the City of Renton, WA. The project includes excavation of the water quality treatment volume, construction of a berm, removal of existing baffle wall, and installation of new approximately 210-feet of 12- inch pond outlet piping and manhole to replace the existing outfall. The new pond will be approximately 14-feet deep (including detention volume) with 3:1 side slopes. The detention volume will not be affected. A 2-foot high retaining wall along the east side of the pond may be considered depending on further evaluation of construction costs. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The project is located in the NW 1/4 of Section 10, Township 23N, Range 5E, in the City of Renton, and in King County, Washington. The parcel number is 1023059434. The address is 4520 NE 10'" Street. The property is located on the north side of NE 10th Street, approximately 300 feet east of the intersection with Anacortes Avenue NE and 600 feet west of Duvall Avenue NE. B. ENVIRONMENTAL ELEMENTS 1. EARTH a. General description of the site (circle one); flat, rolling, hilly, steep slopes, mountainous, other. Rolling, 5 to 10% slope on pond site. b. What is the steepest slope on the site (approximate percent slope?) About 33% on the pond site. c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. The soils are generally common forms of glacial till and are typically silty sands with some gravel. They are classified as Alderwood Gravelly Sandy Loam (AgC) and Arents- Alderwood Material (AmC). d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. No e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source offill. C:\Documents and Settings\aquynn\Local Settings\Temporary Internet Files\Content.Outlook101J8DPP21SEPA 3 Checklist-5-6-2013.doc 05/10/13 Approximately 1,500 cubic yards of soil may be excavated to form the water quality portion of the pond. Approximately 200 cubic yards of soil may be placed as backfill for the new outfall piping. The contractor will supply the backfill from licensed gravel pits. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Minor erosion could occur during construction of the detention pond. g. About what percent of the site will-be covered with impervious surfaces after project construction (for example, asphalt or buildings)? No new impervious surfaces are proposed. Approximately 2.5 percent (1,200 sf) of detention pond site is covered with an existing asphalt access road and pad and will remain so as part of this project. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR Typical erosion control measures such as silt fencing, catch basin inlet protection, hydroseeding, and replanting of the site should reduce and control any erosion from construction activities. a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, and industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. During construction, dust and exhaust from construction equipment will occur. After construction, no emissions are expected from the site. Maintenance activities, such as cleaning the pond every 3 to 5 years will cause temporary emissions from construction equipment. b. Are there any off-site sources of emission or odor that may affect your proposal? If so, generally describe. No. c. Proposed measures to reduce or control emissions or other impacts to air, if any: Construction equipment will have mufflers and exhaust systems in good working order. Dust will be kept down by watering the excavation as needed. 3. WATER a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site (including year- round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. C:\Documents and Settings\aquynn\Local Settings\Temporary Internet Files\Content.Outlook\OIJ8DPP2ISEPA 4 Checklist -5-6-2013.doc 05/10/13 One Category 2 wetland was found on the property north of the detention pond property, and drains to an unnamed tributary noted below. The wetland area within 100 feet of the property line was measured at 1,033 sf. There is a small, unnamed tributary about 400-600 feet north of the detention pond property that drains the Category 2 wetland to the upper part of Honey Creek and to May Creek (#0285A, "May Creek Current and Future Conditions Report", King County Surface Water Management Division 1995). Development has occurred on the properties north of the detention pond site, and the northern part of the unnamed tributary has been culverted for residential and business development. In addition, a large portion of Honey Creek north of the project site was culverted 40 to 50 years ago. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes. please describe and attach available plans. Construction will be within 200 feet of the Category 2 wetland located north of the detention pond property. The City of Renton requires a 50-foot buffer from Category 2 wetlands. The existing detention pond area is not being expanded by the project and no work will occur in the wetland buffer. Silt fencing will be used to help protect the offsite wetland. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. None. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No. 5) Does the proposal lie within a 100-year flood plain? If so, note location on the site plan. No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No. b. Ground Water: 1) Will ground water be withdrawn. or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. There is a shallow groundwater table, approximately O to 4 feet below the pond bottom, perched on glacial till under the site. The permeability of the glacial till is typically low (estimated at 1x10-4 to 1x10-5 cm/sec). There is also a deeper ground water table about 30 feet below ground surface. The project will have no more or less groundwater inflow than the current detention pond. The outlet will not be lowered, and so no more groundwater will be able to flow into the pond. Infiltration may increase slightly as the standing water in C:\Documents and Settingslaquynn\Local Settings\Temporary Internet Files1Content.Outlook101J8DPP21SEPA 5 Checklist -5-6-2013.doc 05/10/13 the water quality pond slowly infiltrates when the water surface of the pond is at or below the outlet elevation. Due to the low permeability of the soils, the additional volume infiltrated is expected to be minimal. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals ... ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None. c. Water Runoff (including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any {include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Stormwater runoff into the pond comes from the existing system in NE 1 o•• Street, which serves the areas east of the pond. Those areas include open fields, single- family residences, a church, and City and County ROW. Discharge from the pond will continue to go into the existing system in NE 10•• Street. The existing system runs about 1700 feet to the north in NE 11th PL and Whitman CT, and eventually connects to a culvert in Whitman CT that Honey Creek flows in. Honey Creek flows into May Creek, which flows to Lake Washington. The total amount of stormwater flowing from the detention pond to the existing system will not change as a result of this project. 2) Could waste material enter ground or surface waters? If so, generally describe. Any liquid spills in the street could enter the drainage system and pond. The same potential currently exists without the expanded water quality treatment pond. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: The water quality pond is not expected to create new water impacts. The water quality pond will probably help reduce the amount of sediment in the stormwater runoff. The detention function of the pond will not be affected. 4. PLANTS a. Check or circle types of vegetation found on the site: _ x _ deciduous tree: alder, maple, aspen, other __ evergreen tree: fir, cedar, pine, other _x_ shrubs _x_ grass __ pasture __ crop or grain __ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other __ water plants: water lily, eel grass, milfoil, other C:\Documents and Settings\aquynn\Local Settings\Temporary Internet Files\Content.Outlook\OlJ8DPP2\SEPA 6 Checklist -5-6-2013.doc 05/10/13 __ other types of vegetation b. What kind and amount of vegetation will be removed or altered? Vegetation within the existing detention pond bottom including grass, brush, and shrubs will be removed to allow for excavation of the water quality pond. c. List threatened or endangered species known to be on or near the site. None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: All disturbed areas not used for the pond, access road, and associated features will be seeded with native grass for long-term erosion control. 5. ANIMALS a. Circle any birds and animals, which have been observed on or near the site or are known to be on or near the site: Birds: hawk, heron, eagle, songbirds, other Small birds and ducks in general Mammals: deer, bear, elk, beaver, other Typical small mammals such as mice and squirrels may be present Fish: bass, salmon, trout, herring, shellfish, other _____ _ b. List any threatened or endangered species known to be on or near the site. None known. c. Is the site part of a migration route? If so, explain No. d. Proposed measures to preserve or enhance wildlife, if any: None. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. None needed for the completed project. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: Not applicable (NA). C:\Documents and Settingslaquynn\Local Settings\Temporary Internet Files\Content.Outlook\O 1J8DPP2ISEPA 7 Checklist-5-6-2013.doc 05/10/13 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. During construction fuel and oil spills could occur. 1) Describe special emergency services that might be required. Typical emergency services by the Fire Department in case of fire, injury, or fuel spills. 2) Proposed measures to reduce or control environmental health hazards, if any: The Contractor will be required to keep construction equipment in good operating condition, maintain spill response kits onsite during construction and will be responsible to cleanup any oil or fuel leaks and spills, and repair leaking equipment. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? None. 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. Short-term: Noise from construction equipment may occur between the hours of 7 AM to 5 PM Monday through Friday and 9 AM to 8 PM on Saturdays during construction. 3) Proposed measures to reduce or control noise impacts, if any: The contractor will be required to keep the construction equipment's mufflers and exhaust systems in good operating condition. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? A detention pond is currently located on the site. The adjacent properties are mainly single-family residences. The Martin Luther King Baptist Church on SE 116th ST is across from the site. b. Has the site been used for agriculture? If so, describe. The site has not recently been used for agricultural (in at least the last 20 years or more). c. Describe any structures on the site. C:\Documents and Settings\aquynn\Local Settings\Temporary Internet Files\Content.Outlook\OIJ8DPP2\SEPA 8 Checklist -5-6-2013.doc 05/10/13 Chain link fences and catch basins. d. Will any structures be demolished? If so, what? No. e. What is the current zoning classification of the site? The property is zoned R-8. f. What is the current comprehensive plan designation of the site? Residential Single Family g. If applicable, what is the current shoreline master program designation of the site? NA h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. No. i. Approximately how many people would reside or work in the completed project? None. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any: NA I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The site is currently fenced for public safety and security. 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. None. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. None. c. Proposed measures to reduce or control housing impacts, if any: NA C:\Documents and Settingslaquynn\Local Settings\Temporary Internet Files\Content.Outlook\01J8DPP21SEPA 9 Checklist -5-6-2013.doc 05/10/13 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed. An approximately 6-foot high chain link fence currently exists around the entire detention pond site and will not be modified. b. What views in the immediate vicinity would be altered or obstructed? None. c. Proposed measures to reduce or control aesthetic impacts, if any: Re-establish grass cover in areas disrupted by construction. 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? None. b. Could light or glare from the finished project be a safety hazard or interfere with views? No. c. What existing off-site sources of light or glare may affect your proposal? None. d. Proposed measures to reduce or control light and glare impacts, if any: NA 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? None. b. Would the proposed project displace any existing recreational uses? If so, describe. No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: NA 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any places or objects listed on, or proposed for, national state, or local preservation registers known to be on or next to the site? If so, generally describe. C:\Documents and Settingslaquynn\Local Settings\Temporary Internet Files\Content.Outlook\01J8DPP2\SEPA 10 Checklist-5-6-2013.doc 05/10/13 None known. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. None known. c. Proposed measures to reduce or control impacts, if any: NA 14. TRANSPORTATION a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The detention pond site is located on NE 1 o'" Street. It can be reached by Duvall Avenue NE, or by Union Ave NE. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? There are bus routes on major adjacent streets such as Unions Ave NE, Sunset Blvd NE, and Duvall Avenue NE approximately 600 to 1400 feet away. c. How many parking spaces would the completed project have? How many would the project eliminate? No parking spaces will be created or eliminated. d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private? No. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. None. g. Proposed measures to reduce or control transportation impacts, if any: NA 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. C:\Documents and Settings\aquynn\Local Settings\Temporary Internet Files\Content.Outlook\01J8DPP2\SEPA 11 Checklist -5-6-2013.doc 05/10/13 The water quality pond will need occasional maintenance and cleaning by the City of Renton. b. Proposed measures to reduce or control direct impacts on public services, if any. None. 16. UTILITIES a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. Electricity, natural gas, water, telephone, sanitary sewer are all available at the site. b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity, which might be needed. The pond and pipes are stormwater utilities owned by the City of Renton. Construction and operation will be provided by the City of Renton through private contractors and the City Maintenance Department. The new water quality pond will require excavation and installation of new pipes. C. SIGNATURE I, the undersigned, state that to the best of my knowledge the above information is true and complete. It is understood that the lead agency may withdraw any declaration of rion-significance that it might issue in reliance upon this checklist should there be any willful misrepresentation or willful lack of full disclosure on my part. Proponent: Name Printed: Date: C:\Documents and Settingslaquynn\Local Settings\Temporary Internet Files\Content.0utlook\OIJ8DPP2\SEPA 12 Checklist-5-6-2013.doc 05/10/13 /~ ! KLEINFELDER ~ Bright Peopfe. Right Solutions. May 9, 2013 Kleinfelder Project No. 134216 BHC Consultants Attention: Mr. Jeff Kreshel, P.E. 1601 Fifth Avenue Suite 500 Seattle, WA 98101 Subject: Geotechnical Review Detention Pond Retrofit Project NE 101h Street and Anacortes Avenue NE Renton, Washington Dear Mr. Kreshel: City of R D:,,. , enton '•! ' 1 ,n:q Division \'.'1 '· I!;,• 1 -~ ,;J)j This letter presents our comments on geotechnical aspects of the proposed NE 10th Street and Anacortes Avenue NE Detention Pond Retrofit Project in Renton, Washington. Project Understanding In preparation for this work, we reviewed selected pond as-built drawings; the geotechnical report by CH2M Hill dated October, 2001; and the conceptual design memo by BHC Consultants dated May 6, 2013. We understand the pond modifications are designed in accordance with the 2009 King County Surface Water Design Manual (KCSWDM). The pond site is located in a groundwater protection area. The pond site is in a residential area in the Renton Highlands. The pond is roughly rectangular in shape with long dimension running north/south; it is situated near the toe of a slope extending up to the east. The pond site is surrounded by chain link fencing. Access to the pond is from NE 10th Street with a short pavement apron entrance and locked gate. A "berm" is oriented north/south along the west side of the detention pond and is relatively flat at approximate Elevation 414 feet ( reference elevation datum NAVO 88). The ground surface elevation along the top edge of the east pond side slope is at Approximate Elevation 424 feet. According to the as-built plans, the pond bottom is relatively flat at approximate Elevation 406 feet. The existing pond side slopes are typically inclined 3H:1V (horizontal:vertical). The proposed pond modifications will involve deepening the pond by 8 feet to bottom Elevation 398 feet. Within the deepened portion of the pond, the excavation side slopes 134216/SEA 13L0208 Copyright 2013 Kleinfelder Page 1 of 5 May 9. 2013 14710 NE 87° Street, Suite A100, Redmond. WA 98052 p 1425.636.7900 f 1425.636.7901 will be inclined at 3H:1V to match existing side slopes. A retaining wall with an exposed height of about 2 feet is being considered along the eastern side of the pond to provide additional storage volume (with bottom of wall at Elevation 398 feet and top of wall at approximate Elevation 400 feet). The BHC conceptual design includes an internal water quality berm extending east- west, at top Elevation 405 feet and with 3H:1V side slopes down to the north and south to new pond bottom Elevation 398 feet. The top width of the proposed berm is 5 feet, as required per Section 6.4.1 of the KCSWDM. Soil and Ground Water Conditions We reviewed prior borings presented in the October 2001 CH2M Hill geotechnical report prepared for the original pond design. The report included logs of two exploratory borings drilled in the footprint of the pond, designated B-1 and B-2, which extended from approximately Elevation 413 and 414 feet, respectively. Both borings encountered a thin veneer of surficial topsoil and disturbed/weathered native soil overlying dense glacial till, which extended to approximately Elevation 388 feet. The glacial till is described as very dense and laboratory testing indicated a fines content ranging from 35 to 44 percent. Based on the reported density and composition, we estimate the glacial till underlying the pond site has very high shear strength and low permeability. Below Elevation 388 feet, both borings reported advance outwash, which CH2M Hill characterized as very dense sand with variable silt and gravel content. Laboratory testing indicated a fines content of 8 percent. Based on a ground water monitoring well installed in one of the prior borings, CH2M Hill reported that the upper 5 feet of the outwash is unsaturated. Based on our prior geotechnical and hydrogeologic evaluations of this outwash unit and review of the CH2M Hill report, we estimate the depth to the regional ground water table to be 25 feet, or more. Conclusions and Recommendations Based on our review of existing geotechnical data and the conceptual pond modification plan, we offer these conclusions and recommendations: 1. The proposed pond excavation is anticipated to be within glacial till. Section 6.2.4 of the KCSWDM allows detention ponds within groundwater protection areas to be unlined, providing the exposed pond bottom soils have an infiltration rate less than or equal to 2.4 inches per hour (1.7x10-3 cm/sec). We characterize the dense undisturbed glacial till underlying the pond site as essentially impenmeable, i.e., infiltration rate of the order of 1x10-6 cm/sec, or slower. With approximately 10 feet of undisturbed glacial till below the proposed new pond bottom; this will provide a sufficient separation/protection between the pond and the underlying more permeable glacial outwash and the regional aquifer within the outwash unit. 134216/SEA13L0208 Copyright 2013 Kleinfelder Page 2 of 5 May 9, 2013 KLEINFELDER 14710 NE 57'h Street, Suite A100, Redmond, WA 98052 p 1425.636.7900 f j 425.636.7901 2. The regional ground water table at this site is significantly deeper than the proposed pond deepening. Seasonal precipitation tends to develop a perched ground water condition with water standing in low-lying areas above glacial till. This condition originally existed in this area and resulted in the design/construction of the existing storm water pond facility. Based on the information available, we conclude that the proposed pond enhancements will not impact the regional ground water conditions. Seasonally perched ground water and surface runoff will continue to collect in this constructed facility, as intended. 3. At permanent inclinations of 3H:1V, the proposed side slopes will be sufficiently stable with respect to potential sliding. Until a vegetative mat is established along the slopes above ground water, there will be a tendency for surficial erosion and skin sliding during heavy precipitation. However, this can be minimized by controlling surface water runoff and installation of temporary and permanent erosion control measures along the newly-excavated side slopes. 4. We understand the deepened portion of the pond (i.e., below Elevation 406 feet) will be permanently inundated. Significant vegetative cover will not form on these side slopes. Given the significant fines content of the glacial till and the moderately steep 3H:1V side slopes planned, some erosion and sloughing will tend to occur on these slopes. However, once the pond is in operation and full of water, the tendency for sloughing and erosion will reduce. If desired, these slopes could be protected from erosion and sloughing by placing a protective cover of crushed ledge rock such as Permeable Ballast (per section 9-03.9(2) of WSDOT Standard Specifications). If a Permeable Ballast cover is planned, it should be at least 12 inches thick. To enhance the stability along the ballasUnative contact, the glacial till side slopes should be prepared with one or two benches, at least 3-feet wide and 1-foot tall. 5. The proposed internal water quality berm will be approximately 7 feet tall with 3H:1V side slopes and a 5-foot top width. We recommend this berm be created by leaving existing dense glacial till intact, rather than by excavation and re-compaction. The existing dense glacial till berm will be much stronger and erosion resistant than a re-compacted earth berm. 6. Construction of the pond should be undertaken during dry weather and with the pond completely drained. The existing glacial till is moisture sensitive and earthwork should be avoided during wet weather. Minor seepage may be encountered during excavation and require use of sumps and pumps. 7. The new pond outlet will extend west from the northwest corner of the pond, and will turn south along the existing west access road/berm. The trench depth will be approximately 7 feet. Per Washington Administrative Code (WAC) for construction safety, temporary excavations exceeding 4 feet in depth should be sloped or shored. Sloped excavations in dense glacial till can typically be sloped at 3/4H:1V. An experienced geo-inspector should observe trench activities to confirm conditions. 134216/SEA 13L0208 Copyright 2013 Kleinfelder Page 3 of 5 May 9, 2013 KLEINFELDER 14710 NE 87'" Street, Suite A100, Redmond, WA 98052 p J 425.636.7900 f J 425.636.7901 8. Outlet pipe bedding and backfill should conform to City of Renton standards. The on-site glacial till may be suitable for re-use as trench backfill, provided it is at/near optimum moisture content and materials greater than 6 inches are removed. Backfill should be placed in maximum 10-inch thick lifts and compacted to a dense and unyielding condition. 9. We concur with other generalized site earthwork recommendations presented in the CH2M Hill geotechnical report. 10. From a geotechnical engineering perspective, a 2-foot high retaining wall supporting a cut along the east side of the deepened pond is feasible. In order to satisfy KCSWDM and City of Renton requirements, the wall must be of concrete construction. In our opinion, a 2-foot high cut wall can be economically constructed at this site using precast concrete blocks (such as Ultrablock). We can provide design and construction recommendations for the retaining wall, if required. 11. Providing the foregoing recommendations are implemented in design and construction, the proposed pond modifications will be stable from a geotechnical engineering perspective. Moreover, based on our review, the proposed modifications appear to satisfy geotechnical engineering requirements presented in the 2009 KCSWDM. Limitations This work was performed in a manner consistent with that level of care and skill ordinarily exercised by other members of Kleinfelder's profession practicing in the same locality, under similar conditions and at the date the services are provided. Our conclusions, opinions, and recommendations are based on a limited number of observations and data. It is possible that conditions could vary between or beyond the data evaluated. Kleinfelder makes no other representation, guarantee, or warranty, express or implied, regarding the services, communication (oral or written), report, opinion, or instrument of service provided. This report may be used only by the Client and the registered design professional in responsible charge and only for the purposes stated for this specific engagement within a reasonable time from its issuance, but in no event later than two (2) years from the date of the report. The work performed was based on project information provided by Client. If Client does not retain Kleinfelder to review any plans and specifications, including any revisions or modifications to the plans and specifications, Kleinfelder assumes no responsibility for the suitability of our recommendations. In addition, if there are any changes in the field to the plans and specifications, Client must obtain written approval from Kleinfelder's engineer that such changes do not affect our recommendations. Failure to do so will vitiate Kleinfelder's recommendations. 134216/SEA13L0208 Copyright 2013 Kleinfelder Page 4of5 May 9, 2013 KLEINFELDER 14710 NE 87'h Street, Suite A100, Redmond, WA 98052 p 1425.636.7900 f I 425.636.7901 Closure We trust the foregoing satisfactorily addresses your current need. If you have any questions or we may provide additional services, please contact the undersigned at 425.636.7947. We appreciate the opportunity to provide geotechnical services to you on this project. Sincerely, KLEINFELDER WEST, INC. Marcus Byers, P.E., P.Eng Principal Geotechnical Engineer 134216/SEA13L0208 Copyright 2013 Kleinfelder Erik 0. Andersen, P.E., P.Eng Principal Geotechnical Engineer Project Manager Page 5 of 5 May 9, 2013 KLEINFELDER 14710 NE 87th Street, Suite A100, Redmond, WA 98052 p I 425.636.7900 f I 425.636.7901 :l • r~ emfs~~ TECHNICAL MEMORANDUM Date: 5/7/2013 To: From: CC: Subject: Allen Quynn, P.E. City of Renton ~'tf_.,, ~ Peter Cunningham, P.E./Jeff Kreshel, P.E{ BHC Consultants Ron Straka, P.E City of Renton Water Quality Pond Sizing Analysis and Conceptual Design City of Renton City ot Renton Piarn,:nq Division NE 10th Street and Anacortes Avenue NE Detention Pond Retrofit Project No: 13·10291.01 1. Introduction The purpose of the NE 10th Street and Anacortes Avenue NE Detention Pond Retrofit Project (Retrofit Project) is to improve water quality downstream of the pond by converting tt into a combined detention and water quality pond. The existing pond is located near the intersection of NE 10"' Street and Anacortes Avenue NE in the City of Renton, WA as shown on Figure 1. The existing pond, with a detention volume of 82,600 cubic feet (cf), was originally constructed to alleviate flooding issues in the area. The pond was sized to detain up to the 25-year return period storm event. The existing pond includes inlet and outlet piping, a flow restrictor, baffle walls to increase the flow path, two emergency overflows, an access road, site fencing, and a bypass in NE 1 o"' Street that allows flow to bypass the pond during maintenance. The existing detention pond and surrounding site conditions are depicted on Figure 2. City of Renton Project LocationNicinity Map Figure NE 10th St/ Anacortes Ave NE Detention Pond Retrofit City of Renton 1 Apnl 2013 , ;· CJ,' J I .. , I I _, ~- f :><> ~ ,, .. ,z,,,,,,.., --r ,.,,...., on a ·~ BHC Consultants, LLC ~ 1601 Fifth Avenue, Suite 500 ... _. Seattle, WA 98101 206.505.3400 206.505.3406 (fax) L S www.bhcconsultants.com EMERGENCY OVERFLOW SPILLWAY Existing Detention Pond and Site Conditions NE 10th St/Anacortes Ave NE Detention Pond Retrofit City of Renton Apnl 2013 ( \ l Figure 2 :1•re-: cmfsli_~ The Retrofit Project will be designed in accordance with the 2009 King County Surface Water Design Manual (KCSWDM) and City of Renton standards, except where existing physical site constraints or other considerations/limitations dictate otherwise. Modifications are being funded by a grant from the Department of Ecology (DOE) and in-kind contributions from the City of Renton. This analysis differs from the analysis included in the grant application by including the tributary areas from all surfaces rather than only the pollution generating surfaces. This is because it is not feasible to separate out the flows prior to entering the pond. 2. Basin Hydrology and Characteristics Model The Western Washington Hydrology Model (WWHM) is used to calculate water quality treatment volume using rain gage data, land use, and soil types. The volume is equal to that of the 6-month, 24-hour storm event runoff volume. Rain Gage The Seatac rain gage with a precipitation factor of 1.167 is used to determine the rainfall volume in the tributary basin. Tributary Basin The tributary basin area to the pond is approximately 18.84 acres and is delineated on Figure 3 based on the Design Report for the NE 1 o'" Street/Anacortes Avenue NE Detention Pond and Storm System Improvement Project (CH2MHill, 2004) and modified with input from the City. The resulting basin boundary was not delineated using the topography and therefore differs slightly in some areas. The pond's tributary basin is zoned R-8, which allows up to 75% of surfaces on lots to be impervious. Existing Land Use The Design Report for the NE 10th Street/Anacortes Avenue NE Detention Pond and Storm System Improvement Project (CH2MHill, 2004) is used as the starting point for determining the existing land use conditions and is modified based on input from the City and drainage reports from three developments in the basin which have been constructed since the existing pond was built. These three developments are the Ridgely Plat, Duvall Short Plat, and Vuong Short Plat. TECHNICAL MEMORANDUM 4 Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 1 o'" Street and Anacortes Avenue NE Detention Pond Retrofit April 24, 2013 BHC Consultants, LL C Legend n Access Riser • Tank ___..Pipe • Catchbasin -Type 1 -Vault =Channel • Catchbasin -Type 2 MH @ Bioswale -=-=-*"= Culvert • Concrete/Curb Inlet -Type 4 -Pond -----Ditch 0 Unknown ~ ---+ Fake Natural Wetland ~ 2ft Contours ---+ Other ' fZ2l Potential Future Redevelopment .:!Ji._ Stormwater WeUand --+ Unknown -·' , .-• !' / /.c" < Y:_ .1. 'QA ·-\ '-? :' / ~l ·r,. 1 i / / ) \'··< r ; ' /.,"\ / _J '.-----f / ~/ )·. ; ' ' /! t.' 'I / I '·\. i -~ "'7 ', ' • • .• I '" ___ '' 'H ·. /·.' '-_ ,<::.,· \•,. !' ;,,.l j ! \ ) ).,'f _,: .-..._____;' l _;, \ -.::_v /..__; / A I I • ----~-r 1 ·..._ "" '\ '_'/ / ·· ... /, ' )j -"· ~-[·./r / ;,., ~-T\ -·. I "v ; (' , ; • ; I ; .; / [i I I ·_, --I '\J,,.~ , -~ ' ' .. , ... ,. ' ; ' ., _, ' ' ' ' ,---, ' '1. '_ l · ' I •'_ '-•' l _ 'J--· -_ -4\----' ,,;--r . ' 1: '] I r, ,.-----L. ::.:..L_ f 1..,, \ i ' U ~~ ~ -·--"":3-:.-·-;Ne-' '/ L,!, "· 7~ 11 'I ~.,v-, ';-,\ • C /,-l(~>,~ , i 1'\\ ( / .. -- 83 Pond CG , Vault (;.~ Bioswale ~ Rain Garden ~' "'""" Slormwater Wetland p,0 l'.,,\I'< .. : Natural Welfand Basin Boundary ! ~ /,/' ~--{ i .,--....._.;------·----,·-·-·-·-··-:.:: = -v-'. --~:":. i ; ' J I 4-:::>: ~,,,,+·-.:::5' ' ! j,, \ :----t I !-.~'~ r;-~'i1--,-~-: I -,- ,\ ,• ,1 I -~ , ~n-r -1 _ / t(,'\-f' I /' ,_,:,,,, E -! \ ~ I2::::::: '] __ i '-.....:-. _ -r--0 t -~A( ,..t\lF 9tb' i; --J, , c_ =--"--__J__. -_"'."··-~' I'}-~,' ' ' '\ -:',~.:-~ ' 1__'.;/ -~---___ ,,_., ~----. -'\" --__ ,_ • I- ., ti ,. ~ ----=q ~ , Gia '" I\ ,,.1--(\ , '-. :z1 •..• 1_1 { \ l ·;,·-----\ ;1 JI ---' ,'-....-...J ii ., ii ,,-.,.t~'::,. ~ • ~ BHC Consultants, LLC A-\ 1601 Fifth Avenue. Suite 500 .... Seattle, 1/1.eshmgton 98101 206.505.3400 206.505.3406 (fax) C S~TANTS wwwbhcooo'"llaals<0m COPYRIGHT C 2013 BHC CONSULTANTS LLC ALL RIGHTS RESERVED Stormwater System: City of Renton 2012 Topography: City of Renion 2010 GIS Base Data: City of Renton & Klng County. ./1r Daia sources supplied may not reflect current or actual conditions This map is a geographic representation based on information available It does not represent survey data. No warranty is made concerning the accuracy, currency-, or compleleness of data depicted on this map. <'. ~ :i! r--.,-.,6' \. ''" ,---i i 0 100 200 --400 -Feet ---Sc:ale in Feet ( i I I ( ) ! (-----\\ ' /; r' \'----___ ., ' \ ··--\,- ~ ' ------:~-----r--,, .. --- !/ __ ___,----') 2~?:::1-., ~~--,~ 1 ii~-"-· ) \:~_ ---~:~~;"! I '\,_,,/ / / i i ·:1:::::=.-, ' ---·1 =-~ ) BOUNDARY 11, '.' ..J i------- ,--'. L_ r '-._; \~ U\ \! FOOTBALL ' c' ~ 4r.o ' II: FIELD )I '· (-~ ,,\-,\ < -~ ~ ' ' ' "-"'-....._ J;,,I, / :,, I ;Ille-r ' /1'1>'\ \ -u ----\ ..... J ~,]--\......_......._ BASEBALL ~--··+.J ~/ )' FIELD / TRIBUTARY BASIN MAP NE 10th St/Anacortes Ave NE Detention Pond Retrofit City of Renton April 2013 " ·- '• --\.._- \ --"-..1 Figure 3 The Ridgely and Duvall plats include local, on-site water quality and detention facilities. The Vuong plat includes a water quality facility only. These detention facilities were modeled using WWHM to more accurately represent the basin hydrology and hydraulics and the resulting required water quality treatment volume. Due to the attenuation of flow through the detention facility, the volume leaving a detention facility during the water quality event over a 24-hour period is less than the volume entering the detention facility over the same time period. This reduces the required water quality treatment volume. The analysis used for the DOE Grant Application assumed that only pollution generating impervious surfaces would be tributary to the pond. The analysis in this document, however, includes all surfaces draining to the pond because it is not feasible to separate out runoff from the pollution generating from the non-pollution generating surfaces. Build-Out Land Use Build-out land use conditions is based on the existing conditions described above and modified by assuming that under-developed parcels would be redeveloped with 75% impervious surfaces as allowed by the R-8 zoning. The redeveloped portion of the basin assumes that detention will be included and will reduce the required water quality volume by 32%. This assumption is based on analyzing the reduction in required volume from the Ridgely Plat and is believed to be a reasonable representation. Soils Based on the USDA Web Soil Survey and the Geotechnical Report for the NE 1 o"' StreeVAnacortes Avenue NE Stormwater System Improvement Project (CH2MHill, 2001 ), the area is underlain by glacial till soils. See Appendix A for soils information. Tributary Basin Areas Existing conditions basin areas are shown on Table 1 and build-out conditions basin areas are shown on Table 2. TECHNICAL MEMORANDUM 6 Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 10"' Street and Anacortes Avenue NE Detention Pond Retrofit April 24, 2013 BHC Consultants, LL C Table 1: Existing Conditions Basin Areas Slope Impervious (acres) Grass on Till (acres) Total (acres) 0-5% 3.45 5.78 9.23 5-15% 3.59 6.02 9.61 Total 7.04 11.8 18.84 Table 2: Build-Out Conditions Basin Areas Slope Impervious (acres) Grass on Till (acres) Total (acres) 0-5% 4.78 4.45 9.23 5-15% 4.96 4.65 9.61 Total 9.74 9.10 18.84 3. Applicable Design Standards/Criteria and Proposed Water Quality Pond Features Standards The water quality portion of the pond will meet the design requirements for Basic Treatment of Section 6.4.1 of the KCSWDM and City of Renton standards except where existing physical site constraints or other considerations/limitations dictate otherwise. Proposed water quality pond features are described below. Water Quality Pond Geometry The water quality depth of the pond shall be between 4-and 8-feet plus 1-foot of sediment storage. The bottom width of the pond shall be a minimum of 12-feet for maintenance vehicle access. The pond length shall be at a minimum three times the width at mid-depth of the dead storage portion of the pond. Side Slopes and Walls Side slopes steeper than 3: 1 are prohibited per Renton Municipal Code (RMC) 4-6-030 Drainage (Surface Water) Standards. Vertical retaining walls are allowed but shall be constructed of reinforced concrete. TECHNICAL MEMORANDUM 7 Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 10"' Street and Anacortes Avenue NE Detention Pond Retrofit April 24, 2013 BHC Consultants, LLC Pond Cells Two cells separated by a berm or a baffle are required per the KCSWDM for water quality treatment volumes greater than 4,000 cf. Given existing physical site limitations two cells could decrease the available water quality volume in the pond. A berm with 3: 1 side slopes is recommended to achieve this requirement while maintaining access for maintenance vehicles to the first cell. When two cells are included, the first cell must have 25-35% of the water quality volume, and the second cell does not need to include sediment storage. A sump is also recommended to assist in pumping out the pond to remove accumulated sediment from the pond bottom and otherwise maintain the facility. Access An access ramp shall be provided to the bottom of the pond for maintenance with slopes no steeper than 7:1 and shall meet the requirements of Section 6.4.1 of the KCSWDM. Pond Outlet A new pond outlet will be constructed from the north end of the pond to the existing flow control structure. Pond Liner Section 6.2.4 of the KCSWDM requires a liner if the soil has an infiltration rate greater than 0.15 inches/minute. The CH2M Hill geotechnical report indicates that the soils on site have an infiltration rate of 0.02 inches/minute and therefore no liner will be required. Site Fencing Fencing is required around the site per (RMC) 4-6-030. The site is currently fenced and it is assumed the fence will not need to be replaced. 4. Existing Pond Physical Site Constraints and Other Considerations/Limitations Existing Pond Physical Site Constraints The detention pond was constructed to alleviate periodic flooding in the area. In order to prevent flooding from occurring as a result of this project, the City is requiring the Retrofit Project to not adversely impact the detention function of the pond. Therefore, the water quality treatment volume must be constructed below the bottom of the detention volume. This requirement -----·-----·----·---... ----·------·--·-------~-"~ -, ---·-----. -·---------------··---- TECHNICAL MEMORANDUM 8 BHC Consultants, LLC Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 1 o"' Street and Anacortes Avenue NE Detention Pond Retrofit April 24, 2013 restricts the maximum footprint of the water quality treatment component of the pond to approximately 10,600 sf and the top of the water quality treatment volume to an elevation of 406-feet of the National Adjusted Vertical Datum (NAVO) 1988. Given the above desired physical parameters, the resulting maximum water quality treatment volume available within the existing pond footprint/site is approximately 55,000 cf. To achieve this, this pond would have 3:1 side slopes and retaining walls on the western, northern, and eastern sides of the pond, and a water quality depth of 8-feet. Budget Limitations Construction of this project is being funded by a $200,000 grant from the Department of Ecology (DOE) along with some in-kind contributions from the City of Renton. This budget may limit the size and features of the pond. 5. Water Quality Pond Sizing Alternatives Analysis Four alternative configurations were developed for the water quality treatment volume evaluation: "Existing Land Use" configuration, "Build-Out Land Use" configuration, "Site-. Constrained" configuration, and "Budget-Constrained" configuration. "Existing Land Use" Configuration The "Existing Land Use" configuration is sized using the existing land use conditions described in Section 2, including upstream detention facilities modeled in order to more accurately size the required water quality treatment volume. Approximately 59,372 cf of water quality treatment volume is required to meet the Basic Treatment requirements under the "Existing Land Use" configuration. There is insufficient space on site to construct a facility with this volume while meeting the design criteria. "Build-Out Land Use" Configuration The "Build-Out Land Use" configuration is sized using the build-out land use conditions described in Section 2, including upstream detention facilities modeled in order to more accurately size the required water quality treatment volume. Details of future redevelopment and TECHNICAL MEMORANDUM 9 BHC Consultants, LLC Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 10th Street and Anacortes Avenue NE Detention Pond Retrofit May 7, 2013 :l • r~ ~s-r!~ detention facility assumptions are described therein. Approximately 62,633 cf is required to meet Basic Treatment requirements under the "Build-Out Land Use" configuration. There is insufficient space on site to construct a facility with this volume while meeting the design criteria. "Site-Constrained" Configuration The "Site-Constrained" configuration is sized to provide the maximum water quality treatment volume given the existing site constraints described in Section 4. This configuration would include retaining walls along the western, northern, and eastern sides of the pond in order to increase capacity to the maximum allowable on the site. The remainder of the side slopes would be 3: 1. The pond depth would be the maximum of 8-feet. A berm would be used to separate the two cells. Because of these physical parameters, the "Site-Constrained" configuration is limited to approximately 55,000 cf. "Budget-Constrained" Configuration The "Budget-Constrained" configuration is sized to provide the maximum water quality treatment volume given the budget limitation of $200,000 discussed in Section 4. This configuration would include 3:1 side slopes. A berm would be used to separate the two cells. It is believed that a pond of up to approximately 40,000 cf may be constructed within the $200,000 budget. The "Budget-Constrained" configuration is shown on Figure 4. Alternatives Comparison The alternatives are compared in Table 3. A generic cross section (independent of a specific alternative) is shown on Figure 5. Planning level opinions of probable construction cost were based on bid tabulations from similar projects resulting in total construction equivalent cost of approximately $5/cf per retrofit volume. Actual costs may vary based on a more detailed opinion of probable construction cost. Model output is included in Appendix B. TECHNICAL MEMORANDUM 10 Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 1 o'" Street and Anacortes Avenue NE Detention Pond Retrofit May 7, 2013 • "••-•-----•·•••-•-•--· •-• --'' V • -•·-••• BHC Consultants, LLC I~ ! ) l ' im 1:J I ! I r-J )8 _j IOH s, I I I _J ;ca.I<!) I I,'<'- ? •I 1'.J..'<, PLUG AND ABANDON EX POND OUTLET _ _,,,. I h f? ·I d.i l ' ·r ' i I ·~ BHC Consultants, LLC ~ 1601 Fifth A,eooe, Sorte 500 ..... Seattle, WA 98101 206 505 3400 L 206 505 3406 (fax) S WWW bhcconsultants com r j I I I l .I . ~ I s ' ~ i / l'.\ROPOSED CONTOURS 3\ 1 SIOE SLOPES P \ OPOSED BERM 3:~\SIDE SLOPES /-r~~~ I . / T:5&4 ACCESS ROAD ! I -·-LI Proposed Pond Layout Figure "Existing Land Use" Configuration NE 10th SVAnacortes Ave NE Detention Pond Retrofit 4 Crty of Renton April 2013 (II_[ NAM[ UPDAT[D BY) ,---PLC·f UM£ &: Ult/£ rl I S·\C~D\RfNTON\12-10291 01 !OTH ANACORTfS PWD\TJWC5\r1J 10291,./1~5J)III,_ {PL~) A<>f?°lfifi)/j /1·JRJ4 I XREFS. rK_X,J[ ± MAXIMUM DETENTION WATER SURFACE 1--------=--------~D:"E~T~E~N~T~IO~N~T~O~~~~~ID~TH~~("~Fl~X=E~D -~) _---~ ~LEVATION ___ / v 3: 1 SIDE SLOPE ("FIXED) J ~ EL406 'Q///////////////////////////////////////////A////////////////.,A DETENTION BOTIOM WITH/ WATER QUALITY TOP WIDTH ("FIXED) 3:1 SIDE SLOPE (•FIXED) DETENTION ("FIXED) NOTE: FEATURES DENOTED (•FIXED) WILL NOT BE MODIFIED SO THAT DETENTION FUNCTIONALITY WILL NOT BE ADVERSELY AFFECTED j . rh~J BHC Consultants, LLC 1601 Fifth Avenue, Suite 500 Seattle, WA 98101 206.505.3400 206.505.3406 {fax) ~ S www.bhcoonsoltants.com COPYRIGHT Cl 2013 BHC CONSULTANTS. LLC. ALL RIGHTS RESERVED WATER QUALITY TREATMENT VOLUME (V) WATER QUALITY DEPTH (D) "llll;.v@#~ I~ i + VOLUME ("FIXED) VERTICAL WALL OR 3: 1 SIDE SLOPE 1'SEDIMENT STORAGE WATER QUALITY BDTIOM ADDITIONAL WATER QUALITY TREATMENT VOLUME WITH WALL SECTION WIDTH (W) ffi FIGURE4 Typical Pond Retrofit Cross Section NE 10th St/Anacortes Ave NE Detention Pond Retrofit City of Renton April 2013 Figure 5 Table 3: Pond Alternative Comparison Water Bottom Bottom Depth 1 Probable Alternative Length' Width' Retaining Quality Construction Configuration (ft) Wall Treatment Costs2 (ft) (ft) Volume (cf) "Existing Land Use" NIA NIA NIA NIA 59,372 $297,000 "Build-Out Land NIA NIA NIA Use" NIA 62,633 $313,000 "Site-Constrained" 132 62 8 3, 8-foot 55,000 $275,000 "Budget- 132 13 Constrained" 8 2-foot 40,000 $200,000 (1) All d1mens1ons are for the water quality treatment volume. (2) Construction costs based on planning-level estimates as described herein and actual costs may vary based on a more detailed opinion of probable construction cost. 6. Conclusion Because of the current budget limitations for this project, the "Budget-Constrained" configuration with a water quality treatment volume of approximately 40,000 cf, 3: 1 side slopes, and a berm separating the two cells is recommended. This pond's actual water quality treatment volume and physical characteristics will need to be evaluated further during final design and development of a more detailed opinion of probable construction cost. Should additional project funds become available, the "Site Constrained" configuration, or a configuration including a larger water quality treatment volume, may be considered further. TECHNICAL MEMORANDUM 13 Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 1 o'" Street and Anacortes Avenue NE Detention Pond Retrofit May 7, 2013 BHC Consultants, LLC TECHNICAL MEMORANDUM Appendix A Soils Information 15 Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 101h Street and Anacortes Avenue NE Detention Pond Retrofit April 24, 2013 --------BHC Consultants, LLC "' .., "' N ~ 563280 563340 563400 563.460 47" 30' 4" ~ 0 ~ i O • ~ 47" 29' 51" 563280 563340 563400 563460 Map Scale: 1:2 ,910 ,r prn ted on A s;ze (8 .5 " x 11") s heet N A 4 0 80 0 300 0 150 USDA Natural Resources ""' ~ C onservation Service Soil M ap-King County Area, W ashington (N E 10th Street and Anacortes Avenue NE Basin) 160 563_520 563520 600 563580 Meters 240 Feet 9UU 563640 563640 Web Soil Survey National Cooperati ve Soil Survey 563700 563.760 563_8 20 563760 563820 563880 563880 g "' "' "' g <O "' "' 0 "' a, 0 ~ 0 N a, 0 ~ i 0 )sl "' 4 /9/2013 Page 1 of 3 47 • 30' 4" 47' 29' 5 1" = Soil Map-King County Area, Washington (NE 10th Street and Anacortes Avenue NE Basin) MAP LEGEND MAP INFORMATION Area of Interest (AOI} D Area of Interest {AOI) Soils D Soil Map Units Special Point Features w Blowout 181 Borrow Pit * Clay Spot • Closed Depression X Gravel Pit Gravelly Spot @ Landfill A Lava Flow ... Marsh or swamp ~ Mine or Quarry @ Miscellaneous Water ® Perennial Water V Rock Outcrop + Saline Spot Sandy Spot -=-Severely Eroded Spot (; Sinkhole p Slide or Slip ;{ Sadie Spot $! Spoil Area 0 Stony Spot Natural Resources Conservation Service (I) 'I' Very Stony Spot Wet Spot .a. Other Special Line Features ~~ Gully ~ Short Steep Slope ~ Other Political Features e Cities Water Features -Streams and Canals Transportation ~ Rails r0•,...,,.\ --~ ~ ,L,~ Interstate Highways US Routes Major Roads Local Roads Map Scale: 1 :2,920 if printed on A size (8.5" x 11") sheet. The soil surveys that comprise your AOI were mapped at 1 :24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for accurate map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov Coordinate System: UTM Zone 10N NAD83 This product is generated from the USDA~NRCS certified data as of the version date(s) listed below. Soil Survey Area: Survey Area Data: King County Area, Washington Version 7, Jul 2, 2012 Date(s) aerial images were photographed: 7/24/2006 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Web Soil Survey National Cooperative Soil Survey 4/9/2013 Page 2 of3 Soil Map-King County Area, Washington NE 1oth Street and Anacortes Avenue NE Basin Map Unit Legend AgC 18.5 100.0% I Alderwood gravelly sandy loam, 6 to 15 percent slopes -----~-------------f------------4 Totals for Area of Interest Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 18.5 100.0% 4/9/2013 Page 3 013 t) CH2MHILL ..... PROJECT NUMBER 159867. DP .03 BORING NUMBER 8-1 Sheet: 1 of 2 SOIL BORING LOG PROJECT Anacortes & 10th Ave. Detention Pond LOCATION North of Wetland Boundary ELEVATION 412.8 ft DRILLING CONTRACTOR Cascade Drilling, Inc. DRILLING METHOD AND EQUIPMENT HSA w/CME 75 Truck Rig WATER LEVELS See Comments START 8/4/2000 FINISH 8/4/2000 LOGGER J. Theodore SAMPLE STANDARD SOIL DESCRIPTION COMMENTS PENETRATION ~[ C z TEST RESULTS e z ,. SOIL NAME, uses GROUP SYMBOL, COLOR, lil "' .. <( DEPTH OF CASING, DRILLING a: MOISTURE CONTENT, RELATIVE DENSITY OR mo i a: "' RA TE, DRILLING FLUID LOSS, ti w > CONSISTENCY, SOIL STRUCTURE, mw 0 6"-6"-6" (N) TESTS AND INSTRUMENTATION I!! ~~ 0 MINERALOGY w:, "' C fl> i!, a: 0 Ground Surface SAND)'. SILT TO SIL TY SAND Slart @ 8:25 AM -(ML TO SM); dark brown, slightly moist, Grass covered at the ground stiff/medium dense, scattered gravel, organic surface matter (roots). 5 SIEVE ANALYSIS (S-1A) 5.0 S-1 17 18-30-60/5 (80/11 ') A:TOP 6"; SILTW/SAND &GRAVEL, ML: 6.8 gray, moist, hard, scattered cobbles. 15% Gravel ----~--(WEATHERED TILL) 41% Sand . B: Bottom 11 ": SIL TY SAND W/GRAVEL 44% Fines -Moisture content = 11 % (SM); gray, slightly moist to moist, very dense, scattered cobbles. (TILL) 10 Less silty than S-1. ~ .. 10.0 SILTY SAND W/GRAVEL {SM); 10.5 8-2 4 (50/6") gray, slightly moist, very dense, estimated 10% to 20% lines. (TILL) - 15 SPT hammer was bouncing 15.0 POOR RECOVERY and re-striking after 5 blows (1 ") 15.2 S-3 2 (50/2") SILTY SAND W/GRAVEL (SM); gray, slightly moist, very dense. (TILL) 20 Broken 1/2" gravel peices In 20.0 S-4 4 (50/4") SILTY SAND W/GRAVEL (SM); tip of split spoon. 20.3 same as above. . . 2o PROJECT NUMBER 159867.DP.03 BORING NUMBER B-1 Sheet: 2 ol 2 4t CH2MHILL •· SOIL BORING LOG PROJECT Anacortes & 10th Detention Pond LOCATION North of Wetland Boundary ELEVATION 412.8 ft DRILLING CONTRACTOR Cascade Drilling, Inc. DRILLING METHOD AND EQUIPMENT HSA w/CME75 Truck rig WATER LEVELS See Comments START 8/4/2000 FINISH 8/4/2000 SAMPLE STANDARD SOIL DESCRIPTION PENETRATION - if Q % TEST RESULTS e z > SOIL NAME, uses GROUP SYMBOL, COLOR, _, -< Ww _, a: MOISTURE CONTENT, RELATIVE DENSITY OR mu ~ a: w ~i w >· CONSISTENCY, SOIL STRUCTURE, Dlw 0 5•..a 1•..fi• (N) w :; 0. u MINERALOGY w::, ~ iH: w CO, a: 25.0 POORLY GRADED SAND W/SILT, SP-SM; 25.8 S-5 8 23-50/4 (50/4") brown, moist, very dense, scattered gravel, fine to medium sand (OUTWASH). 30 30,0 POORLY GRADED SAND Wl§lbI l§P-SM}; -31 S-6 12 50-50/6 (50/6") tan·brown, wet, very dense, est. 10% silt 'IOUTWASH\. __ -End of Boring 35- 40~ - 45- - - 5u- LOGGER J. Theodore COMMENTS DEPTH OF CASING, DRILLING RA TE, DRILLING FLUID LOSS, TESTS AND INSTRUMENTATION SI EVE ANALYSIS (S-6) 4%Gravel 88%Sand 8% Fines Moisture content = 19% Could hear water entering hole at depth once augers removed. / BOH@ 31 ft. Set Piezometer with: Screen: 25 ft to 30 ft; Sana: 23ft lo 30 fl; Bentonite Plug above 23 ft. Set Piezometer in unlogged hole approx. 8 ft away from B· 1. Screen: 1 O ft to 15 ft; Sand: 8 fl to 15 ft; Bentonlte Plug above 8 ft. PROJECT NUMBER 159867.DP.03 BORING NUMBER B-2 Sheet: 1 of 2 fl CH2MHILL • SOIL BORING LOG PROJECT Anacortes & 10th Ave. Detention Pond LOCATION Soulhwest Corner of Lot ELEVATION 413.8 ft DRILLING CONTRACTOR Cascade Drilling, Inc. DRILLING METHOD AND EQUIPMENT HSA w/CME 75 Truck Rig WATER LEVELS See Comments START 8/4/2000 FINISH 8/4/2000 SAMPLE STANDARD SOIL DESCRIPTION PENETRATION ~f Q z TEST RESULTS C z SOIL NAME, uses GROUP SYMBOL, COLOR, ...,_ "' > Ww ..J a: mo "' a: w MOISTURE CONTENT, RELATIVE DENSITY OR > w LOGGER J. Theodore COMMENTS DEPTH OF CASING, DRILLING RA TE, DRILLING FLUID LOSS, t: ~ i5 CONSISTENCY, SOIL STRUCTURE, a: "'w 6"-6"-6" (NJ TESTS AND INSTRUMENTATION I!! :,; Q. 0 MINERALOGY w:, i!~ w Qo, ~ a: 0-Ground Surface SA!\!DY SILT TO SILTY SAND Start Drilling at 10 AM. (ML TO SM); dark brown, slightly moist, Grass coverd at the ground stiff/medium dense, scattered gravel, organic surface. matter (roots). Contact @ approximately 2 ft. . 2.5 SIL TY-SAND (SM\; 3.9 S-1 4 7-25-5/50 (75111 ') gray-rust mottled, slightly moist, very dense, scattered gravel and cobbles. (WEATHERED TILL) Contact @ approximatley 4 ft. 5 SIEVE ANALYSIS (S-2) 5.0 SILTY SAND W/GRAVEL. SM; ·- 6.5 S-2 18 15-26-50/6 (50/6") gray with black, green and pink (broken} gravel, 19% Gravel -[ __ ··---·--·-----~-slightly moist, very dense. (TILL) 46%Sand 35% Fines Moisture content = 9% 10 ------------- 10.0 SIL TY SAND W/GRAVEL (SM); 10.8 S-3 7 32-50/3 (50/3") gray, slightly moist, very dense. (TILL) . 15 --.J._ ____ Sample S-4 did not appear ------ 15.0 SIL TY SAND (SM); lobe Till. -16.5 S-4 18 8-18-30 (48) gray-tan, moist, dense, fine sand. Driller noted different malerial -----at15ft. 20-~ -------1-inch gravel peice in split 20.0 VERY POOR RECOVERY spoon tip -SPT blow count -20.5 S-5 1 (50/6") SILTY SAND WIGRAVEL (SM); gray, moist, potentially misleading. ' very dense. Increased rig chatter and more gravel in trimmings at 23 ft. I j 25 PROJECT NUMBER 159867.DP.03 BORING NUMBER 8-2 Sheet: 2 of 2 (t CH2MHILL .... SOIL BORING LOG PROJECT Anacortes & 10th Detention Pond LOCATION Southwest Corner of Lot ELEVATION 413.8 ft DRILLING CONTRACTOR Cascade Drilling, Inc. DRILLING METHOD AND EQUIPMENT HSA w/CME75 Truck rig WATER LEVELS See Comments START 8/4/2000 FINISH 8/4/2000 SAMPLE STANDARD SOIL DESCRIPTION PENETRATION ~f Q [ TEST RESULTS _._ ::! > SOIL NAME, uses GROUP SYMBOL, COLOR, Ww -' a: a, 0 i a: w MOISTURE CONTENT, RELATIVE DENSITY OR ~f w > CONSISTENCY, SOIL STRUCTURE, mw 0 6''-6"-6~ (N) Q. a: ~ ::! Q. in MINERALOGY w::, ~1:: Qo, a: 25.0 SILTY SAND W£GRAVEL {SM}; -25.5 S-6 6 (50/6") gray, slightly molsl, vefY dense. (TILL). . 30 30.0 POQRL Y GRADEQ SA!:!D W/SILT {SP-SM}; -30.8 S-7 8 30-50/3 (50/3") tan-gray, moist, v81)' dense, fine to medium sand, Jnterbedded silty sand layers (OUlWASH) . . 35 35.0 A:TOP 2"; POORLY GRADED GRAVEL WITH -36.0 S-8 .8 19-50/6 (50/6") SANO TO POORLY GRADED SAND W/GRAVEL (SP TO GP); brown, wel to moisl, very dense, coarse sand. B: MIDDLE l "; SIL TY SAND (SM); tan, moist, very dense, fine sand. C: BOTTOM 5"; POORLY GRADED SAND TO POORLY GRADED SANO W/SIL T (SP TO 40 SP-SMI; black, moist, verv dense. (OUlWASHl 40.0 S-9 15 18-37-40 (77) SILTY SAND {SM); 41.5 tan, wet, very dense, fine sand. ---- End of Boring 45- - - 50- LOGGER J. Theodore COMMENTS DEPTH OF CASING, DRILLING RATE, DRILLING FLUID LOSS, TESTS ANO INSTRUMENTATION Groundwater table @ 41 fl (?) - BOH@ 41.5 FT Sample S-9 had 7" of slough in top of spoon. Well graded sand (SW); black, moist, fine to medium sand. (OUTWASH) PROJECT NUMBER BORING NUMBER CH2MHILL 159867 B-1 SHEET 1 OF 1 PIEZOMETNER COMPLETION DIAGRAM PROJECT: NE 10lh StreeVAnacorles Avenue NE Stormwater System lmprove~~l LOCATION: Near pond center ELEVATION: 412.B~ ft DRILLING CONTRACTOR: Cascade Drilling i,D .. R..,IW=N"G=M.,.Ec.T._.H,,O,-D--'A"-N,,_D'.'Ec:D;,:U1=PM=E'-'NT-'--"U"S"°ED"--'-: ,cCccM,cE__c7,c5__cT'-'ru"'c"kccM,,ou ... n..,te:,d'.'A.elg._..w/ .. H..,oc,llo ... w,_S,-le=mc-A.,u=er ___________________ _ WATER LEVELS: Not measured START: 8!4/2000 END: 8/4/2000 LOGGER: J. Theodore I , 1" 1 • Ground elevation at well 412.81 Ceet 2-Top of casing elevation __ .:4c,1,_6.ee05,,_,,te ... e,,t _________ _ a) vent hole? ______ W:,:::A'------------- 3-Wellhead prolection cover~'--No,o:,nc::•:...---------- a) weep hole? NIA b) concrete pad dimensions ,w.:A:c._ ___________ _ 4-Diameter/type of well casing f" Schedule 40 PVC with fleld slots 5-Type/slot size of screen Fleld slots 30.0' 6-Type screen lifter a) Ouanlity used ____ _:sSe,ae,n>,d:"2'-be,a,io,,s'---------- 7 -Type of seal a) Ouanllty used ____ _cBe,ea,n,soe,n,,ite,_C""-"hl.,ps~to'.'nc,ee,ar,..,_su,,,rt,,a,,ce"'-; 1,.,0,_ba=o,esc... 5 8-Grout a) Graul mix used ___ _,W'"'A..:·-"s"ol,:1 c,:oc,v.e•c:ro"'v,.,ee.r,_b,cene,l,cone,;,stec,s,see,a,._I __ b) Method of placement NIA c) Quantity al well casing grou NIA,_ ___________ _ 6 Development method Inside Augers Development time 1 hour Estlrnaled purge volume 1 -2 gallons Comments See Boring Log B-1 for soil Stratigraphy -----------------~·------- 0.7' WelK.' omµlel1U11l.ogB-l .lds PROJECT NUMBER EOAINQ NUMBER • CH2MHILL 159867 B-1A SHEET 1 OF 1 ... PIEZOMETER COMPLETION DIAGRAM ~ROJECT: NE 10th S1reet/Anaoor1es Aveooe NE Slonnwater System Improvement LOCATION: South end of pond ELEVATION: 413.09 ft DRILLING CONTRACTOR; Cascade Drilling DRILLING METHOD AND EQUIPMENT USED: CME_?~ !_ruck Mounted Rig w/Hollow Ste~'-Accu~ge~r ==~-~--cc=~~=--------1 WATER LEVELS: Nol measured START: 814/2000 END: 8/4/2000 LOGGER: J. Theodore 1"' 1 • Ground elevat!on at well 413.0918&1 2-Top of casing elevation __ _c4c,134."'9"9""fee,ec,I _________ _ a) vent hole7 _____ -'Nl=A,_ ___________ _ 3-Wellhead protection cover type-~N_o_n_e __________ _ a) weep hole? NIA b) concrete pad dimensions 0N/-'-A'-'-------------- 4-Diameter/type of well casing 1 • Schedule 40 PVC with fletd slots 5-Type/slot size of screen Field slots 15.0' 6-Type screen filler a) Quantity used _____ S~•~n~d~i 2~b~•9~'~--------- 7-Type of seal a) Quantity used ____ _,Be=n"'on"i"te,._C,:hi,,·.,ps,_,,loc,n=•,,ae._r "'""""""ce";"5'-ba=g"s'- 6-Grout a) Grout mix used ----'Nl=A,_-_,s"'o"ll "cove='-'"ov.c•~r_,,b,,e,,nlc,o,,nicct•~•~•"a"-l __ b) Method of placement NIA c) auanll!y of well casing gtollNIA,_ ___________ _ Development method __ __;;lr.c\S.cld.c•_Au=g~•.crs~--------- Development time 1/2 hour Estimated purge volume 1 aUon Comments See Boring Log B-1 for soll Stratigraphy I• • I o.,· 1 WellComplelionloqB 1 A.xis Appendix B Model Output TECHNICAL MEMORANDUM 16 BHC Consultants, LLC Water Quality Pond Sizing Analysis and Conceptual Design City of Renton NE 10"' Street and Anacortes Avenue NE Detention Pond Retrofit April 24, 2013 General Model Information Project Name: Site Name: Renton -Anacortes WQ -Existing Land Use Detention Pond Retrofit Site Address: City: NE 10th Street and Anacortes Avenue NE Renton, WA Report Date: 4/19/2013 Gage: Seatac Data Start: 1948/10/01 Data End: 2009/09/30 Timestep: 15 Minute Precip Scale: 1.17 Version: 2013/03/19 POC Thresholds Low Flow Threshold for POC1: High Flow Threshold for POC1: Low Flow Threshold for P Low Flow Threshold for POC4: High Flow Threshold for POC4: Low Flow Threshold for POC5: High Flow Threshold for POC5: Renton -Anacortes WQ -Existing Land Use 50 Percent of the 2 Year 50 Year 50 Percent of the 2 Year 50 Year 4/1912013 9:19:39 AM Page 2 Landuse Basin Data Predeve/oped Land Use Renton -Anacortes WQ -Existing Land Use 4/19/2013 9:19:39 AM Page3 Mitigated Land Use Duvall Bypass: No GroundWater: No Pervious Land Use Acres C, Lawn, Flat 0.205 C, Lawn, Mod 0.205 Pervious Total 0.41 Impervious Land Use Acres ROADS FLAT 0.42 ROADS MOD 0.42 Impervious Total 0.84 Basin Total 1.25 Element Flows To: Surface lnterflow Groundwater Duvall Vault Duvall Vault Renton -Anacortes WO -Existing Land Use -till 517/2013 2:52:52 PM Page4 Ridgely Bypass: No GroundWater: No Pervious Land Use Acres C, Lawn, Flat 0.653 C, Lawn, Mod 0.653 Pervious Total 1.306 Impervious Land Use Acres ROADS FLAT 1.057 ROADS MOD 1.057 Impervious Total 2.114 Basin Total 3.42 Element Flows To: Surface lnterflow Groundwater Ridgely Pond Ridgely Pond Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:52:52 PM Page 5 Undetained Basin Bypass: Yes GroundWater: No Pervious Land Use Acres C, Lawn, Flat 4.303 C, Lawn, Mod 4.543 Pervious Total 8.846 Impervious Land Use Acres ROADS FLAT 2.592 ROADS MOD 2.732 Impervious Total 5.324 Basin Total 14.17 Element Flows To: Surface lnterflow Groundwater NE 10th Street/Anacortes .4.0tl,NHfr€lilfAntimnrlllmu1.ve NE Detention Pond Renton· Anacortes WO· Existing Land Use· till 517/2013 2:52:52 PM Page6 Routing Elements Predeveloped Routing Renton· Anacortes WQ • Existing Land Use· till 5/7/2013 2:52:52 PM Page 7 Mitigated Routing Ridgely Pond Bottom Length: Bottom Width: Depth: Volume at riser head: Side slope 1: Side slope 2: Side slope 3: Side slope 4: Discharge Structure Riser Height: Riser Diameter: Orifice 1 Diameter: Orifice 2 Diameter: Element Flows To: 120.12 ft. 20.02 ft. 6 ft. 0 .4522 acre-ft. 2 To 1 2 To 1 2 To 1 2 To 1 5 ft. 12 in. 1.72 in. 1.56 in. Elevation:O ft. Elevation:3.35 ft. Outlet 1 Outlet 2 NE 10th StreeUAnacortes Ave NE Detention Pond Pond Hydraulic Table Stage(ft) 0.0000 0.0667 0.1333 0.2000 0.2667 0.3333 0.4000 0.4667 0.5333 0.6000 0.6667 0.7333 0.8000 0.8667 0.9333 1.0000 1.0667 1.1333 1.2000 1.2667 1.3333 1.4000 1.4667 1.5333 1.6000 1.6667 1.7333 1.8000 1.8667 1.9333 2.0000 2.0667 2.1333 2.2000 Area(ac) 0.055 0.056 0.056 0.057 0.058 0.059 0.060 0.061 0.062 0.063 0.063 0.064 0.065 0.066 0.067 0.068 0.069 0.070 0.071 0.072 0.073 0.073 0.074 0.075 0.076 0.077 0.078 0.079 0.080 0.081 0.082 0.083 0.084 0.085 Volume(ac-ft) 0.000 0.003 0.007 0.011 0.015 0.019 0.023 0.027 0.031 0.035 0.039 0.044 0.048 0.052 0.057 0.061 0.066 0.071 0.075 0.080 0.085 0.090 0.095 0.100 0.105 0.110 0.115 0.120 0.126 0.131 0.137 0.142 0.148 0.153 Discharge(cfs) lnfilt(cfs) 0.000 0.000 0.020 0.000 0.028 0.000 0.034 0.000 0.040 0.000 0.044 0.000 0.049 0.000 0.053 0.000 0.056 0.000 0.060 0.000 0.063 0.000 0.066 0.000 0.069 0.000 0.072 0.000 0.075 0.000 0.077 0.000 0.080 0.000 0.082 0.000 0.085 0.000 0.087 0.000 0.089 0.000 0.091 0.000 0.094 0.000 0.096 0.000 0.098 0.000 0.100 0.000 0.102 0.000 0.104 0.000 0.106 0.000 0.108 0.000 0.109 0.000 0.111 0.000 0.113 0.000 0.115 0.000 Renton -Anacortes WO -Existing Land Use -till 5/7/2013 2:52:52 PM Page 8 2.2667 0.086 0.159 0.117 0.000 2.3333 0.087 0.165 0.118 0.000 2.4000 0.088 0.171 0.120 0.000 2.4667 0.089 0.177 0.122 0.000 2.5333 0.090 0.183 0.123 0.000 2.6000 0.091 0.189 0.125 0.000 2.6667 0.092 0.195 0.126 0.000 2.7333 0.093 0.201 0.128 0.000 2.8000 0.094 0.207 0.130 0.000 2.8667 0.095 0.214 0.131 0.000 2.9333 0.096 0.220 0.133 0.000 3.0000 0.097 0.226 0.134 0.000 3.0667 0.098 0.233 0.136 0.000 3.1333 0.099 0.239 0.137 0.000 3.2000 0.100 0.246 0.139 0.000 3.2667 0.101 0.253 0.140 0.000 3.3333 0.102 0.260 0.141 0.000 3.4000 0.103 0.266 0.157 0.000 3.4667 0.104 0.273 0.166 0.000 3.5333 0.105 0.280 0.173 0.000 3.6000 0.106 0.287 0.179 0.000 3.6667 0.107 0.295 0.184 0.000 3.7333 0.108 0.302 0.189 0.000 3.8000 0.109 0.309 0.194 0.000 3.8667 0.110 0.316 0.198 0.000 3.9333 0.111 0.324 0.202 0.000 4.0000 0.112 0.331 0.206 0.000 4.0667 0.113 0.339 0.210 0.000 4.1333 0.114 0.346 0.214 0.000 4.2000 0.115 0.354 0.218 0.000 4.2667 0.116 0.362 0.221 0.000 4.3333 0.117 0.370 0.225 0.000 4.4000 0.118 0.377 0.228 0.000 4.4667 0.120 0.385 0.231 0.000 4.5333 0.121 0.393 0.235 0.000 4.6000 0.122 0.402 0.238 0.000 4.6667 0.123 0.410 0.241 0.000 4.7333 0.124 0.418 0.244 0.000 4.8000 0.125 0.426 0.247 0.000 4.8667 0.126 0.435 0.250 0.000 4.9333 0.127 0.443 0.253 0.000 5.0000 0.128 0.452 0.255 0.000 5.0667 0.129 0.460 0.426 0.000 5.1333 0.130 0.469 0.735 0.000 5.2000 0.132 0.478 1.135 0.000 5.2667 0.133 0.487 1.607 0.000 5.3333 0.134 0.496 2.143 0.000 5.4000 0.135 0.505 2.735 0.000 5.4667 0.136 0.514 3.379 0.000 5.5333 0.137 0.523 4.070 0.000 5.6000 0.138 0.532 4.806 0.000 5.6667 0.139 0.541 5.583 0.000 5.7333 0.141 0.551 6.400 0.000 5.8000 0.142 0.560 7.255 0.000 5.8667 0.143 0.570 8.147 0.000 5.9333 0.144 0.579 9.073 0.000 6.0000 0.145 0.589 10.03 0.000 6.0667 0.146 0.599 11.02 0.000 Renton -Anacortes WO -Existing Land Use -till 517/2013 2:52:52 PM Page9 Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:52:52 PM Page 10 Duvall Vault Width: Length: Depth: Discharge Structure Riser Height: Riser Diameter: Orifice 1 Diameter: Orifice 2 Diameter: Element Flows To: 18 ft. 63 ft. 12.56 ft. 12.06ft. 12 in. 0.5 in. Elevation:O ft. 0.875 in. Elevation:6.5 ft. Outlet 1 Outlet 2 NE 10th Street/Anacortes Ave NE Detention Pond Vault Hydraulic Table Stage(ft) 0.0000 0.1396 0.2791 0.4187 0.5582 0.6978 0.8373 0.9769 1.1164 1.2560 1.3956 1.5351 1.6747 1.8142 1.9538 2.0933 2.2329 2.3724 2.5120 2.6516 2.7911 2.9307 3.0702 3.2098 3.3493 3.4889 3.6284 3.7680 3.9076 4.0471 4.1867 4.3262 4.4658 4.6053 4.7449 4.8844 5.0240 5.1636 5.3031 5.4427 5.5822 Area(ac) 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 Volume(ac-ft) 0.000 0.003 0.007 0.010 0.014 0.018 0.021 0.025 0.029 0.032 0.036 0.040 0.043 0.047 0.050 0.054 0.058 0.061 0.065 0.069 0.072 0.076 0.079 0.083 0.087 0.090 0.094 0.098 0.101 0.105 0.109 0.112 0.116 0.119 0.123 0.127 0.130 0.134 0.138 0.141 0.145 Discharge(cfs) lnfilt(cfs) 0.000 0.000 0.002 0.000 0.003 0.000 0.004 0.000 0.004 0.000 0.005 0.000 0.006 0.000 0.006 0.000 0.006 0.000 0.007 0.000 0.007 0.000 0.008 0.000 0.008 0.000 0.008 0.000 0.009 0.000 0.009 0.000 0.009 0.000 0.010 0.000 0.010 0.000 0.010 0.000 0.011 0.000 0.011 0.000 0.011 0.000 0.011 0.000 0.012 0.000 0.012 0.000 0.012 0.000 0.012 0.000 0.013 0.000 0.013 0.000 0.013 0.000 0.013 0.000 0.013 0.000 0.014 0.000 0.014 0.000 0.014 0.000 0.014 0.000 0.014 0.000 0.015 0.000 0.015 0.000 0.015 0.000 Renton -Anacortes WQ -Existing Land Use -till 5/712013 2:52:52 PM Page 11 5.7218 0.026 0.149 0.015 0.000 5.8613 0.026 0.152 0.015 0.000 6.0009 0.026 0.156 0.016 0.000 6.1404 0.026 0.159 0.016 0.000 6.2800 0.026 0.163 0.016 0.000 6.4196 0.026 0.167 0.016 0.000 6.5591 0.026 0.170 0.021 0.000 6.6987 0.026 0.174 0.026 0.000 6.8382 0.026 0.178 0.028 0.000 6.9778 0.026 0.181 0.031 0.000 7.1173 0.026 0.185 0.033 0.000 7.2569 0.026 0.188 0.035 0.000 7.3964 0.026 0.192 0.036 0.000 7.5360 0.026 0.196 0.038 0.000 7.6756 0.026 0.199 0.040 0.000 7.8151 0.026 0.203 0.041 0.000 7.9547 0.026 0.207 0.042 0.000 8.0942 0.026 0.210 0.044 0.000 8.2338 0.026 0.214 0.045 0.000 8.3733 0.026 0.218 0.046 0.000 8.5129 0.026 0.221 0.047 0.000 8.6524 0.026 0.225 0.048 0.000 8.7920 0.026 0.228 0.049 0.000 8.9316 0.026 0.232 0.051 0.000 9.0711 0.026 0.236 0.052 0.000 9.2107 0.026 0.239 0.053 0.000 9.3502 0.026 0.243 0.054 0.000 9.4898 0.026 0.247 0.055 0.000 9.6293 0.026 0.250 0.055 0.000 9.7689 0.026 0.254 0.056 0.000 9.9084 0.026 0.257 0.057 0.000 10.048 0.026 0.261 0.058 0.000 10.188 0.026 0.265 0.059 0.000 10.327 0.026 0.268 0.060 0.000 10.467 0.026 0.272 0.061 0.000 10.606 0.026 0.276 0.062 0.000 10.746 0.026 0.279 0.063 0.000 10.885 0.026 0.283 0.063 0.000 11.025 0.026 0.287 0.064 0.000 11.164 0.026 0.290 0.065 0.000 11.304 0.026 0.294 0.066 0.000 11.444 0.026 0.297 0.066 0.000 11.583 0.026 0.301 0.067 0.000 11.723 0.026 0.305 0.068 0.000 11.862 0.026 0.308 0.069 0.000 12.002 0.026 0.312 0.069 0.000 12.141 0.026 0.316 0.296 0.000 12.281 0.026 0.319 1.082 0.000 12.420 0.026 0.323 2.179 0.000 12.560 0.026 0.327 3.516 0.000 12.700 0.026 0.330 5.054 0.000 12.839 0.000 0.000 6.771 0.000 Renton -Anacortes WO -Existing Land Use -till 51712013 2:52:52 PM Page 12 NE 10th Street/Anacortes Ave NE Detention Pond Bottom Length: 190. 00 ft. Bottom Width: 54.00 ft. Depth: 6.5 ft. Volume at riser head: 1.8769 acre-ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Discharge Structure Riser Height: Riser Diameter: Orifice 1 Diameter: Orifice 2 Diameter: 5.5 ft. 12 in. 1.5 in. 4 in. Elevation:O ft. Elevation:4.5 ft. Element Flows To: Outlet 1 Outlet 2 Pond Hydraulic Table Stage(ft) 406.00 406.07 406.14 406.22 406.29 406.36 406.43 406.51 406.58 406.65 406.72 406.79 406.87 406.94 407.01 407.08 407.16 407.23 407.30 407.37 407.44 407.52 407.59 407.66 407.73 407.81 407.88 407.95 408.02 408.09 408.17 408.24 408.31 408.38 408.46 408.53 Area(ac) 0.235 0.238 0.240 0.242 0.245 0.247 0.250 0.252 0.255 0.257 0.260 0.262 0.265 0.267 0.270 0.272 0.275 0.278 0.280 0.283 0.285 0.288 0.291 0.293 0.296 0.298 0.301 0.304 0.306 0.309 0.312 0.314 0.317 0.320 0.323 0.325 Volume(ac-ft) 0.000 0.017 0.034 0.051 0.069 0.087 0.105 0.123 0.141 0.160 0.179 0.197 0.216 0.236 0.255 0.275 0.295 0.315 0.335 0.355 0.376 0.396 0.417 0.438 0.460 0.481 0.503 0.525 0.547 0.569 0.592 0.614 0.637 0.660 0.683 0.707 Discharge(cfs) lnfilt(cfs) 0.000 0.000 0.015 0.000 0.022 0.000 0.027 0.000 0.031 0.000 0.035 0.000 0.038 0.000 0.042 0.000 0.044 0.000 0.047 0.000 0.050 0.000 0.052 0.000 0.055 0.000 0.057 0.000 0.059 0.000 0.061 0.000 0.063 0.000 0.065 0.000 0.067 0.000 0.069 0.000 0.071 0.000 0.072 0.000 0.074 0.000 0.076 0.000 0.077 0.000 0.079 0.000 0.081 0.000 0.082 0.000 0.084 0.000 0.085 0.000 0.087 0.000 0.088 0.000 0.089 0.000 0.091 0.000 0.092 0.000 0.094 0.000 Renton -Anacortes WQ -Existing Land Use -till 5/712013 2:52:52 PM Page 13 408.60 0.328 0.730 0.095 0.000 408.67 0.331 0.754 0.096 0.000 408.74 0.334 0.778 0.097 0.000 408.82 0.336 0.802 0.099 0.000 408.89 0.339 0.827 0.100 0.000 408.96 0.342 0.852 0.101 0.000 409.03 0.345 0.876 0.102 0.000 409.11 0.347 0.901 0.104 0.000 409.18 0.350 0.927 0.105 0.000 409.25 0.353 0.952 0.106 0.000 409.32 0.356 0.978 0.107 0.000 409.39 0.359 1.003 0.108 0.000 409.47 0.362 1.030 0.110 0.000 409.54 0.364 1.056 0.111 0.000 409.61 0.367 1.082 0.112 0.000 409.68 0.370 1.109 0.113 0.000 409.76 0.373 1.136 0.114 0.000 409.83 0.376 1.163 0.115 0.000 409.90 0.379 1.190 0.116 0.000 409.97 0.382 1.218 0.117 0.000 410.04 0.385 1.245 0.118 0.000 410.12 0.387 1.273 0.119 0.000 410.19 0.390 1.301 0.120 0.000 410.26 0.393 1.330 0.122 0.000 410.33 0.396 1.358 0.123 0.000 410.41 0.399 1.387 0.124 0.000 410.48 0.402 1.416 0.125 0.000 410.55 0.405 1.445 0.220 0.000 410.62 0.408 1.474 0.274 0.000 410.69 0.411 1.504 0.313 0.000 410.77 0.414 1.534 0.346 0.000 410.84 0.417 1.564 0.374 0.000 410.91 0.420 1.594 0.400 0.000 410.98 0.423 1.625 0.424 0.000 411.06 0.426 1.655 0.446 0.000 411.13 0.429 1.686 0.466 0.000 411.20 0.432 1.717 0.486 0.000 411.27 0.435 1.749 0.505 0.000 411.34 0.438 1.780 0.522 0.000 411.42 0.441 1.812 0.539 0.000 411.49 0.444 1.844 0.556 0.000 411.56 0.448 1.876 0.719 0.000 411.63 0.451 1.909 1.061 0.000 411.71 0.454 1.942 1.510 0.000 411.78 0.457 1.975 2.042 0.000 411.85 0.460 2.008 2.647 0.000 411.92 0.463 2.041 3.316 0.000 411.99 0.466 2.075 4.044 0.000 412.07 0.469 2.108 4.825 0.000 412.14 0.473 2.143 5.657 0.000 412.21 0.476 2.177 6.537 0.000 412.28 0.479 2.211 7.461 0.000 412.36 0.482 2.246 8.428 0.000 412.43 0.485 2.281 9.436 0.000 412.50 0.488 2.316 10.48 0.000 412.57 0.492 2.352 11.56 0.000 Renton -Anacortes WQ -Existing Land Use -till 51712013 2:52:52 PM Page 14 Analysis Results POC1 + • + ...... + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area: O Total Impervious Area: 0 Mitigated Landuse Totals for POC #1 Total Pervious Area: 10.562 Total Impervious Area: 8.278 Flow Frequency Method: Log Pearson Type Ill 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.496598 5 year 1.180267 10 year 1.927721 25 year 3.350312 50 year 4.867513 100 year 6.887829 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 1.316916 5 year 2.641871 10 year 3.801519 25 year 5.60398 50 year 7.200646 100 year 9.022015 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.317 0.960 1950 0.476 2.139 1951 1.561 2.862 1952 0.118 0.468 1953 0.434 0.628 1954 0.396 1.113 1955 0.358 1.023 1956 0.519 1.831 1957 0.365 0.798 1958 0.485 1.591 Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:52:52 PM ... r . . -! .. Page 15 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 0.281 1.707 0.490 0.122 0.377 0.435 0.507 0.354 0.509 0.403 0.348 0.356 0.391 1.514 0.506 0.384 0.257 0.393 0.279 0.462 0.113 0.962 0.380 3.097 0.385 0.121 0.273 1.028 1.856 0.376 0.238 4.455 2.014 0.407 0.122 0.113 0.538 2.305 1.780 0.122 1.634 0.521 0.109 0.975 0.422 4.272 0.373 0.452 3.879 3.993 1.893 Ranked Annual Peaks 0.928 3.136 1.403 0.441 1.380 0.986 1.427 0.876 1.912 1.104 1.356 0.521 2.150 2.853 1.197 0.887 1.237 1.170 0.465 0.992 0.451 2.586 0.826 5.534 1.444 0.528 0.508 2.681 3.133 0.538 0.526 6.151 5.085 1.070 0.502 0.413 1.725 3.275 2.878 0.476 2.284 1.478 0.121 2.408 0.610 6.389 1.015 1.935 5.336 6.142 3.318 Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 4.4547 6.3894 2 4.2716 6.1511 3 3.9935 6.1423 Renton -Anacortes WO -Existing Land Use -till 5/7/2013 2:53:41 PM Page 16 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 3.8795 3.0975 2.3050 2.0140 1.8932 1.8561 1.7801 1.7069 1.6342 1.5609 1.5139 1.0283 0.9749 0.9624 0.5381 0.5207 0.5187 0.5092 0.5070 0.5055 0.4898 0.4849 0.4763 0.4620 0.4523 0.4354 0.4341 0.4216 0.4073 0.4032 0.3958 0.3934 0.3911 0.3845 0.3838 0.3800 0.3772 0.3757 0.3729 0.3652 0.3585 0.3561 0.3542 0.3484 0.3170 0.2809 0.2788 0.2732 0.2568 0.2376 0.1224 0.1218 0.1216 0.1210 0.1184 0.1130 0.1126 0.1089 5.5338 5.3360 5.0854 3.3182 3.2754 3.1360 3.1330 2.8784 2.8615 2.8532 2.6812 2.5860 2.4079 2.2840 2.1502 2.1390 1.9347 1.9120 1.8311 1.7252 1.5914 1.4782 1.4438 1.4275 1.4027 1.3799 1.3556 1.2372 1.1970 1.1698 1.1134 1.1036 1.0699 1.0228 1.0147 0.9919 0.9859 0.9600 0.9278 0.8875 0.8764 0.8264 0.7981 0.6285 0.6102 0.5381 0.5281 0.5255 0.5207 0.5084 0.5020 0.4759 0.4679 0.4645 0.4512 0.4410 0.4132 0.1211 Renton -Anacortes WQ -Existing Land Use -till 517/20132:53:41 PM Page 17 Renton -Anacortes WQ -Existing Land Use -till 51712013 2:53:41 PM Page 18 Duration Flows Flow(cfs) Predev Mit Percentage Pass/Fail 0.2483 14200 88058 620 Fail 0.2950 10859 72230 665 Fail 0.3416 7670 57707 752 Fail 0.3883 5223 44318 848 Fail 0.4349 3628 33153 913 Fail 0.4816 2316 23592 1018 Fail 0.5283 1450 15207 1048 Fail 0.5749 930 9120 980 Fail 0.6216 835 7865 941 Fail 0.6682 754 6740 893 Fail 0.7149 682 5636 826 Fail 0.7615 616 4996 811 Fail 0.8082 556 4457 801 Fail 0.8549 502 3980 792 Fail 0.9015 470 3551 755 Fail 0.9482 429 3168 738 Fail 0.9948 396 2845 718 Fail 1.0415 368 2539 689 Fail 1.0882 346 2276 657 Fail 1.1348 318 2087 656 Fail 1.1815 297 1892 637 Fail 1.2281 276 1728 626 Fail 1.2748 256 1592 621 Fail 1.3214 240 1463 609 Fail 1.3681 222 1332 600 Fail 1.4148 199 1224 615 Fail 1.4614 178 1102 619 Fail 1.5081 166 998 601 Fail 1.5547 154 928 602 Fail 1.6014 139 851 612 Fail 1.6481 133 787 591 Fail 1.6947 128 737 575 Fail 1.7414 123 686 557 Fail 1.7880 112 645 575 Fail 1.8347 104 601 577 Fail 1.8814 100 564 564 Fail 1.9280 97 536 552 Fail 1.9747 92 500 543 Fail 2.0213 87 460 528 Fail 2.0680 85 432 508 Fail 2.1146 84 403 479 Fail 2.1613 82 375 457 Fail 2.2080 81 352 434 Fail 2.2546 80 324 405 Fail 2.3013 77 301 390 Fail 2.3479 73 281 384 Fail 2.3946 72 266 369 Fail 2.4413 69 250 362 Fail 2.4879 67 234 349 Fail 2.5346 63 215 341 Fail 2.5812 62 206 332 Fail 2.6279 60 192 320 Fail 2.6746 57 182 319 Fail 2.7212 53 171 322 Fail Renton -Anacortes WQ • Existing Land Use -till 5/7/2013 2:53:41 PM Page 19 2.7679 53 161 303 Fail 2.8145 52 155 298 Fail 2.8612 49 149 304 Fail 2.9078 47 143 304 Fail 2.9545 43 138 320 Fail 3.0012 41 135 329 Fail 3.0478 40 133 332 Fail 3.0945 37 128 345 Fail 3.1411 35 122 348 Fail 3.1878 34 117 344 Fail 3.2345 31 113 364 Fail 3.2811 31 109 351 Fail 3.3278 30 105 350 Fail 3.3744 27 105 388 Fail 3.4211 24 104 433 Fail 3.4678 21 101 480 Fail 3.5144 20 101 505 Fail 3.5611 18 101 561 Fail 3.6077 16 97 606 Fail 3.6544 16 95 593 Fail 3.7010 15 94 626 Fail 3.7477 14 90 642 Fail 3.7944 11 88 800 Fail 3.8410 11 86 781 Fail 3.8877 9 82 911 Fail 3.9343 8 81 1012 Fail 3.9810 7 80 1142 Fail 4.0277 6 79 1316 Fail 4.0743 4 77 1925 Fail 4.1210 4 74 1850 Fail 4.1676 4 74 1850 Fail 4.2143 4 70 1750 Fail 4.2609 3 64 2133 Fail 4.3076 2 61 3050 Fail 4.3543 2 59 2950 Fail 4.4009 2 58 2900 Fail 4.4476 1 57 5700 Fail 4.4942 0 53 n/a Fail 4.5409 0 49 n/a Fail 4.5876 0 44 n/a Fail 4.6342 0 40 n/a Fail 4.6809 0 40 n/a Fail 4.7275 0 38 n/a Fail 4.7742 0 36 n/a Fail 4.8209 0 33 n/a Fail 4.8675 0 31 n/a Fail The development has an increase in flow durations from 1 /2 Predeveloped 2 year flow to the 2 year flow or more than a 10% increase from the 2 year to the 50 year flow. The development has an increase in flow durations for more than 50% of the flows for the range of the duration analysis. Renton -Anacortes WQ -Existing Land Use -till 51712013 2:53:41 PM Page 20 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume: 0.363 acre-feet On-line facility target flow: 0.1775 cfs. Adjusted for 15 min: 0.1775 cfs. Off-line facility target flow: 0.1008 cfs. Adjusted for 15 min: 0.1008 cfs. Renton -Anacortes WQ -Existing Land Use -till 5/712013 2:53:41 PM Page 21 POC2 i ::: -l,~-- 2 s 411 0 J l '"" P-ro:>-n'I. Tim• ~-Ing '" l ,0 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #2 Total Pervious Area: O Total Impervious Area: 0 Mitigated Landuse Totals for POC #2 Total Pervious Area: 10.562 Total Impervious Area: 8.278 Flow Frequency Method: Log Pearson Type Ill 17B Flow Frequency Return Periods for Predeveloped. POC #2 Return Period Flow(cfs) 2 year 2.992256 5 year 4.022024 10 year 4.786636 25 year 5.851343 50 year 6.719191 100 year 7.653761 Flow Frequency Return Periods for Mitigated. POC #2 Return Period Flow(cfs) 2 year 3.937176 5 year 5.449258 1 O year 6.528117 25 year 7.980862 50 year 9.129009 100 year 10.334436 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #2 Year Predeveloped Mitigated 1949 4.059 5.843 1950 4.596 5.332 1951 3.011 3.611 1952 1.855 2.283 1953 2.160 2.417 1954 2.630 3.238 1955 2.553 3.465 1956 2.605 3.157 1957 2.791 4.258 1958 2.261 2.888 1959 2.382 2.453 Renton -Anacortes WQ -Existing Land Use -till 51712013 2:53:41 PM Page 22 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2.825 2.470 2.024 2.819 2.412 3.448 2.163 4.351 4.004 2.499 2.610 3.010 4.237 1.946 2.978 3.033 2.617 2.273 3.126 3.900 4.276 2.723 4.649 3.158 2.209 2.625 2.711 3.575 2.223 3.391 7.879 5.715 2.153 2.308 2.044 2.426 4.243 3.224 2.581 5.555 3.035 3.089 3.282 3.676 5.189 2.560 2.574 7.527 6.059 3.678 Ranked Annual Peaks 4.616 3.388 2.397 3.615 2.937 4.270 2.634 5.258 5.600 4.124 3.713 4.300 5.245 2.121 4.211 4.352 3.301 3.379 3.861 4.501 6.680 3.920 7.971 3.981 2.728 3.769 3.585 4.521 2.228 3.402 9.245 7.307 2.856 2.532 2.062 3.192 5.527 4.133 3.538 8.698 3.926 3.761 5.551 4.963 8.144 3.464 3.269 8.519 7.911 4.606 Ranked Annual Peaks for Predeveloped and Mitigated. POC #2 Rank Predeveloped Mitigated 1 7.8790 9.2449 2 7.5270 8.6976 3 6.0590 8.5189 4 5.7151 8.1442 Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:54:56 PM Page 23 408.60 0.328 0.730 0.095 0.000 408.67 0.331 0.754 0.096 0.000 408.74 0.334 0.778 0.097 0.000 408.82 0.336 0.802 0.099 0.000 408.89 0.339 0.827 0.100 0.000 408.96 0.342 0.852 0.101 0.000 409.03 0.345 0.876 0.102 0.000 409.11 0.347 0.901 0.104 0.000 409.18 0.350 0.927 0.105 0.000 409.25 0.353 0.952 0.106 0.000 409.32 0.356 0.978 0.107 0.000 409.39 0.359 1.003 0.108 0.000 409.47 0.362 1.030 0.110 0.000 409.54 0.364 1.056 0. 111 0.000 409.61 0.367 1.082 0.112 0.000 409.68 0.370 1.109 0.113 0.000 409.76 0.373 1.136 0.114 0.000 409.83 0.376 1.163 0.115 0.000 409.90 0.379 1.190 0.116 0.000 409.97 0.382 1.218 0.117 0.000 410.04 0.385 1.245 0.118 0.000 410.12 0.387 1.273 0.119 0.000 410.19 0.390 1.301 0.120 0.000 410.26 0.393 1.330 0.122 0.000 410.33 0.396 1.358 0.123 0.000 410.41 0.399 1.387 0.124 0.000 410.48 0.402 1.416 0.125 0.000 410.55 0.405 1.445 0.220 0.000 410.62 0.408 1.474 0.274 0.000 410.69 0.411 1.504 0.313 0.000 410.77 0.414 1.534 0.346 0.000 410.84 0.417 1.564 0.374 0.000 410.91 0.420 1.594 0.400 0.000 410.98 0.423 1.625 0.424 0.000 411.06 0.426 1.655 0.446 0.000 411.13 0.429 1.686 0.466 0.000 411.20 0.432 1.717 0.486 0.000 411.27 0.435 1.749 0.505 0.000 411.34 0.438 1.780 0.522 0.000 411.42 0.441 1.812 0.539 0.000 411.49 0.444 1.844 0.556 0.000 411.56 0.448 1.876 0.719 0.000 411.63 0.451 1.909 1.061 0.000 411.71 0.454 1.942 1.510 0.000 411.78 0.457 1.975 2.042 0.000 411.85 0.460 2.008 2.647 0.000 411.92 0.463 2.041 3.316 0.000 411.99 0.466 2.075 4.044 0.000 412.07 0.469 2.108 4.825 0.000 412.14 0.473 2.143 5.657 0.000 412.21 0.476 2.177 6.537 0.000 412.28 0.479 2.211 7.461 0.000 412.36 0.482 2.246 8.428 0.000 412.43 0.485 2.281 9.436 0.000 412.50 0.488 2.316 10.48 0.000 412.57 0.492 2.352 11.56 0.000 Renton -Anacortes WO -Build-Out -till 5/7/2013 3:12:13 PM Page 15 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area: 0 Total Impervious Area: 0 Mitigated Landuse Totals for POC #1 Total Pervious Area: 9.104 Total Impervious Area: 9.736 Flow Frequency Method: Log Pearson Type Ill 178 Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.496598 5 year 1.180267 1 O year 1.927721 25 year 3.350312 50 year 4.867513 100 year 6.887829 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 1.697767 5 year 3.22762 10 year 4.417791 25 year 6.075056 50 year 7.398376 100 year 8.782543 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.317 1.990 1950 0.476 2.795 1951 1.561 3.143 1952 0.118 0.517 1953 0.434 0.984 1954 0.396 1.265 1955 0.358 1.837 1956 0.519 2.232 1957 0.365 1.242 1958 0.485 1.836 Renton • Anacortes WQ • Build-Out -till 517/2013 3:12:13 PM Page 16 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 0.281 1.707 0.490 0.122 0.377 0.435 0.507 0.354 0.509 0.403 0.348 0.356 0.391 1.514 0.506 0.384 0.257 0.393 0.279 0.462 0.113 0.962 0.380 3.097 0.385 0.121 0.273 1.028 1.856 0.376 0.238 4.455 2.014 0.407 0.122 0.113 0.538 2.305 1.780 0.122 1.634 0.521 0.109 0.975 0.422 4.272 0.373 0.452 3.879 3.993 1.893 Ranked Annual Peaks 1.232 3.406 2.146 0.477 1.550 1.437 1.723 1.197 2.832 1.676 2.238 0.552 2.532 3.123 1.460 1.096 2.468 1.282 0.530 1.171 0.492 2.964 1.135 6.002 1.765 0.687 0.618 3.031 3.417 0.703 0.612 6.583 5.529 1.269 0.615 0.447 1.948 3.456 3.097 0.547 2.574 1.927 0.159 3.754 0.883 6.936 1.109 2.265 5.773 6.603 3.649 Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 4.4547 6.9362 2 4.2716 6.6028 3 3.9935 6.5833 Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:15 PM Page 17 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 3.8795 3.0975 2.3050 2.0140 1.8932 1.8561 1.7801 1.7069 1.6342 1.5609 1.5139 1.0283 0.9749 0.9624 0.5381 0.5207 0.5187 0.5092 0.5070 0.5055 0.4898 0.4849 0.4763 0.4620 0.4523 0.4354 0.4341 0.4216 0.4073 0.4032 0.3958 0.3934 0.3911 0.3845 0.3838 0.3800 0.3772 0.3757 0.3729 0.3652 0.3585 0.3561 0.3542 0.3484 0.3170 0.2809 0.2788 0.2732 0.2568 0.2376 0.1224 0.1218 0.1216 0.1210 0.1184 0.1130 0.1126 0.1089 Renton -Anacortes WO -Build-Out -till 6.0017 5.7734 5.5292 3.7541 3.6490 3.4565 3.4171 3.4062 3.1433 3.1230 3.0974 3.0309 2.9635 2.8319 2.7946 2.5738 2.5322 2.4676 2.2652 2.2380 2.2318 2.1458 1.9899 1.9485 1.9267 1.8371 1.8355 1.7648 1.7229 1.6756 1.5500 1.4602 1.4365 1.2821 1.2688 1.2652 1.2423 1.2318 1.1970 1.1707 1.1348 1.1085 1.0957 0.9837 0.8832 0.7032 0.6871 0.6183 0.6155 0.6125 0.5517 0.5466 0.5299 0.5168 0.4923 0.4772 0.4472 0.1592 517/2013 3:12:15 PM Page 18 Renton -Anacortes WQ -Build-Out -till Sn/2013 3:12:15 PM Page 19 Duration Flows Flow(cfs) Predev Mit Percentage Pass/Fail 0.2483 14200 94325 664 Fail 0.2950 10859 78005 718 Fail 0.3416 7670 62947 820 Fail 0.3883 5223 49344 944 Fail 0.4349 3628 37110 1022 Fail 0.4816 2316 26351 1137 Fail 0.5283 1450 16561 1142 Fail 0.5749 930 10027 1078 Fail 0.6216 835 8707 1042 Fail 0.6682 754 7469 990 Fail 0.7149 682 6288 921 Fail 0.7615 616 5632 914 Fail 0.8082 556 5118 920 Fail 0.8549 502 4665 929 Fail 0.9015 470 4241 902 Fail 0.9482 429 3811 888 Fail 0.9948 396 3463 874 Fail 1.0415 368 3091 839 Fail 1.0882 346 2840 820 Fail 1.1348 318 2592 815 Fail 1.1815 297 2393 805 Fail 1.2281 276 2242 812 Fail 1.2748 256 2096 818 Fail 1.3214 240 1950 812 Fail 1.3681 222 1794 808 Fail 1.4148 199 1662 835 Fail 1.4614 178 1545 867 Fail 1.5081 166 1434 863 Fail 1.5547 154 1317 855 Fail 1.6014 139 1231 885 Fail 1.6481 133 1149 863 Fail 1.6947 128 1078 842 Fail 1.7414 123 1012 822 Fail 1.7880 112 932 832 Fail 1.8347 104 868 834 Fail 1.8814 100 809 809 Fail 1.9280 97 761 784 Fail 1.9747 92 714 776 Fail 2.0213 87 669 768 Fail 2.0680 85 637 749 Fail 2.1146 84 601 715 Fail 2.1613 82 575 701 Fail 2.2080 81 542 669 Fail 2.2546 80 511 638 Fail 2.3013 77 463 601 Fail 2.3479 73 428 586 Fail 2.3946 72 409 568 Fail 2.4413 69 379 549 Fail 2.4879 67 349 520 Fail 2.5346 63 323 512 Fail 2.5812 62 309 498 Fail 2.6279 60 292 486 Fail 2.6746 57 277 485 Fail 2.7212 53 258 486 Fail Renton -Anacortes WQ -Build-Out -till 51712013 3:12:15 PM Page 20 2.7679 53 240 452 Fail 2.8145 52 229 440 Fail 2.8612 49 220 448 Fail 2.9078 47 210 446 Fail 2.9545 43 200 465 Fail 3.0012 41 189 460 Fail 3.0478 40 180 450 Fail 3.0945 37 174 470 Fail 3.1411 35 167 477 Fail 3.1878 34 163 479 Fail 3.2345 31 159 512 Fail 3.2811 31 151 487 Fail 3.3278 30 147 490 Fail 3.3744 27 142 525 Fail 3.4211 24 137 570 Fail 3.4678 21 131 623 Fail 3.5144 20 128 640 Fail 3.5611 18 125 694 Fail 3.6077 16 123 768 Fail 3.6544 16 120 750 Fail 3.7010 15 118 786 Fail 3.7477 14 117 835 Fail 3.7944 11 111 1009 Fail 3.8410 11 109 990 Fail 3.8877 9 105 1166 Fail 3.9343 8 104 1300 Fail 3.9810 7 102 1457 Fail 4.0277 6 101 1683 Fail 4.0743 4 100 2500 Fail 4.1210 4 97 2425 Fail 4.1676 4 94 2350 Fail 4.2143 4 91 2275 Fail 4.2609 3 89 2966 Fail 4.3076 2 85 4250 Fail 4.3543 2 79 3950 Fail 4.4009 2 78 3900 Fail 4.4476 1 74 7400 Fail 4.4942 0 72 n/a Fail 4.5409 0 72 n/a Fail 4.5876 0 66 n/a Fail 4.6342 0 61 n/a Fail 4.6809 0 60 n/a Fail 4.7275 0 60 n/a Fail 4.7742 0 57 n/a Fail 4.8209 0 56 n/a Fail 4.8675 0 53 n/a Fail The development has an increase in flow durations from 1/2 Predeveloped 2 year flow to the 2 year flow or more than a 10% increase from the 2 year to the 50 year flow. The development has an increase in flow durations for more than 50% of the flows for the range of the duration analysis. Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:15 PM Page 21 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume: 0.363 acre-feet On-line facility target flow: 0.1775 cfs. Adjusted for 15 min: 0.1775 cfs. Off-line facility target flow: 0.1008 cfs. Adjusted for 15 min: 0.1008 cfs. Renton -Anacortes WO -Build-Out -till 51712013 3:12:15 PM Page 22 POC2 • ' : +-1 ~9'----P..c--~'k---1*--------l'~~--+ + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #2 Total Pervious Area: O Total Impervious Area: 0 Mitigated Landuse Totals for POC #2 Total Pervious Area: 7.068 Total Impervious Area: 5.434 Flow Frequency Method: Log Pearson Type Ill 178 Flow Frequency Return Periods for Predeveloped. POC #2 Return Period Flow(cfs) 2 year 2.992256 5 year 4.022024 10 year 4.786636 25 year 5.851343 50 year 6.719191 100 year 7.653761 Flow Frequency Return Periods for Mitigated. POC #2 Return Period Flow(cfs) 2 year 2.452001 5 year 3.270925 10 year 3.875404 25 year 4.713071 50 year 5.392924 100 year 6.122531 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #2 Year Predeveloped Mitigated 1949 4.059 3.355 1950 4.596 3.670 1951 3.011 2.397 1952 1.855 1.491 1953 2.160 1.778 1954 2.630 2.168 1955 2.553 2.148 1956 2.605 2.084 1957 2.791 2.284 1958 2.261 1.878 1959 2.382 2.005 Renton -Anacortes WQ -Build-Out -till 5f7/2013 3:12:15 PM Page 23 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2.825 2.470 2.024 2.819 2.412 3.448 2.163 4.351 4.004 2.499 2.610 3.010 4.237 1.946 2.978 3.033 2.617 2.273 3.126 3.900 4.276 2.723 4.649 3.158 2.209 2.625 2.711 3.575 2.223 3.391 7.879 5.715 2.153 2.308 2.044 2.426 4.243 3.224 2.581 5.555 3.035 3.089 3.282 3.676 5.189 2.560 2.574 7.527 6.059 3.678 Ranked Annual Peaks 2.211 2.028 1.669 2.308 1.967 2.816 1.757 3.496 3.373 2.058 2.145 2.518 3.437 1.628 2.446 2.544 2.119 1.901 2.653 3.307 3.550 2.247 3.700 2.631 1.825 2.167 2.124 3.003 1.843 2.882 6.297 4.567 1.741 1.957 1.729 2.016 3.328 2.608 2.152 4.517 2.489 2.574 2.656 3.028 4.349 2.026 2.056 5.995 4.364 3.107 Ranked Annual Peaks for Predeveloped and Mitigated. POC #2 Rank Predeveloped Mitigated 1 7.8790 6.2969 2 7.5270 5.9950 3 6.0590 4.5672 4 5.7151 4.5170 Renton -Anacortes WO -Build-Out -till 5/712013 3:12:16 PM Page 24 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 5.5551 5.1891 4.6486 4.5959 4.3512 4.2762 4.2427 4.2366 4.0586 4.0036 3.9001 3.6785 3.6755 3.5755 3.4475 3.3913 3.2817 3.2239 3.1584 3.1259 3.0889 3.0346 3.0326 3.0108 3.0105 2.9781 2.8248 2.8192 2.7914 2.7230 2.7114 2.6301 2.6247 2.6174 2.6096 2.6049 2.5805 2.5742 2.5597 2.5526 2.4991 2.4696 2.4258 2.4125 2.3820 2.3075 2.2734 2.2606 2.2228 2.2086 2.1628 2.1599 2.1531 2.0439 2.0238 1.9462 1.8553 Renton -Anacortes WQ -Build-Out -till 4.3645 4.3495 3.7001 3.6703 3.5502 3.4962 3.4370 3.3726 3.3551 3.3276 3.3073 3.1072 3.0284 3.0033 2.8822 2.8157 2.6564 2.6533 2.6306 2.6082 2.5740 2.5439 2.5182 2.4890 2.4458 2.3974 2.3080 2.2843 2.2475 2.2110 2.1683 2.1669 2.1519 2.1477 2.1453 2.1244 2.1189 2.0839 2.0583 2.0560 2.0276 2.0259 2.0159 2.0052 1.9669 1.9572 1.9008 1.8778 1.8425 1.8245 1.7782 1.7571 1.7415 1.7288 1.6691 1.6277 1.4909 51712013 3:12:16 PM Page 25 Renton -Anacortes WQ -Build-Out -till 51712013 3:12:16 PM Page 26 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 1.4961 1438 670 46 Pass 1.5489 1285 583 45 Pass 1.6016 1151 526 45 Pass 1.6544 1032 478 46 Pass 1.7072 919 438 47 Pass 1.7599 810 404 49 Pass 1.8127 742 372 50 Pass 1.8654 668 333 49 Pass 1.9182 608 304 50 Pass 1.9710 557 275 49 Pass 2.0237 511 249 48 Pass 2.0765 471 228 48 Pass 2.1292 437 200 45 Pass 2.1820 412 175 42 Pass 2.2347 385 158 41 Pass 2.2875 360 146 40 Pass 2.3403 329 136 41 Pass 2.3930 304 129 42 Pass 2.4458 283 120 42 Pass 2.4985 259 113 43 Pass 2.5513 239 105 43 Pass 2.6041 218 97 44 Pass 2.6568 193 87 45 Pass 2.7096 186 83 44 Pass 2.7623 176 81 46 Pass 2.8151 165 74 44 Pass 2.8678 157 66 42 Pass 2.9206 146 56 38 Pass 2.9734 140 53 37 Pass 3.0261 128 50 39 Pass 3.0789 121 47 38 Pass 3.1316 114 46 40 Pass 3.1844 106 44 41 Pass 3.2371 103 41 39 Pass 3.2899 97 37 38 Pass 3.3427 92 33 35 Pass 3.3954 87 30 34 Pass 3.4482 83 28 33 Pass 3.5009 79 24 30 Pass 3.5537 76 23 30 Pass 3.6065 72 20 27 Pass 3.6592 65 19 29 Pass 3.7120 61 16 26 Pass 3.7647 61 16 26 Pass 3.8175 58 15 25 Pass 3.8702 56 15 26 Pass 3.9230 54 15 27 Pass 3.9758 51 15 29 Pass 4.0285 46 15 32 Pass 4.0813 43 14 32 Pass 4.1340 41 12 29 Pass 4.1868 38 12 31 Pass 4.2396 34 11 32 Pass Renton -Anacortes WO -Build-Out -till 5f7/2013 3:12:16 PM Page 27 4.2923 32 11 34 Pass 4.3451 30 11 36 Pass 4.3978 28 8 28 Pass 4.4506 28 7 25 Pass 4.5033 22 6 27 Pass 4.5561 21 5 23 Pass 4.6089 18 4 22 Pass 4.6616 17 4 23 Pass 4.7144 17 4 23 Pass 4.7671 16 4 25 Pass 4.8199 15 4 26 Pass 4.8727 15 4 26 Pass 4.9254 15 4 26 Pass 4.9782 14 4 28 Pass 5.0309 14 3 21 Pass 5.0837 14 3 21 Pass 5.1364 13 3 23 Pass 5.1892 13 3 23 Pass 5.2420 12 3 25 Pass 5.2947 12 3 25 Pass 5.3475 11 2 18 Pass 5.4002 10 2 20 Pass 5.4530 10 2 20 Pass 5.5058 9 2 22 Pass 5.5585 7 2 28 Pass 5.6113 7 2 28 Pass 5.6640 7 2 28 Pass 5.7168 5 2 40 Pass 5.7695 5 2 40 Pass 5.8223 5 2 40 Pass 5.8751 5 2 40 Pass 5.9278 5 2 40 Pass 5.9806 5 2 40 Pass 6.0333 5 1 20 Pass 6.0861 4 1 25 Pass 6.1389 4 1 25 Pass 6.1916 4 1 25 Pass 6.2444 3 1 33 Pass 6.2971 3 0 0 Pass 6.3499 3 0 0 Pass 6.4026 3 0 0 Pass 6.4554 3 0 0 Pass 6.5082 3 0 0 Pass 6.5609 3 0 0 Pass 6.6137 3 0 0 Pass 6.6664 2 0 0 Pass 6.7192 2 0 0 Pass Renton -Anacortes WO -Build-Out -till 5/7/2013 3:12:16 PM Page 28 Water Quality Water Quality BMP Flow and Volume for POC #2 On-line facility volume: 0.9653 acre-feet On-line facility target flow: 0.9064 cfs. Adjusted for 15 min: 0.9064 cfs. Off-line facility target flow: 0.4957 cfs. Adjusted for 15 min: 0.4957 cfs. Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:16 PM Page 29 POC3 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #3 Total Pervious Area: 0 Total Impervious Area: 0 Mitigated Landuse Totals for POC #3 Total Pervious Area: 1.306 Total Impervious Area: 2.114 Flow Frequency Method: Log Pearson Type Ill 178 Flow Frequency Return Periods for Predeveloped. POC #3 Return Period Flow(cfs) 2 year O 5 year 0 10 year O 25 year 0 50 year O 100 year O Flow Frequency Return Periods for Mitigated. POC #3 Return Period Flow(cfs) 2yefil 0 5 year O 10 year 0 25 year 0 50 year O 100 year 0 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #3 Year Predeveloped Mitigated Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #3 Rank Predeveloped Mitigated Renton -Anacortes WQ -Build-Out -till 51712013 3:12:16 PM Page 30 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:17 PM Page 31 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:17 PM Page 32 Water Quality Water Quality BMP Flow and Volume for POC #3 On-line facility volume: 0.3463 acre-feet On-line facility target flow: 0.4182 cfs. Adjusted for 15 min: 0.4182 cfs. Off-line facility target flow: 0.2325 cfs. Adjusted for 15 min: 0.2325 cfs. Renton -Anacortes WO -Build-Out -till 517/2013 3:12:17 PM Page 33 POC4 '"~--~-~--~--~--~ / i\./, " " --'--~-v---+_\-+---+/-+------+----'_ -" \ / "+----t--------,t---\-v-/---+-----+-------+" + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #4 Total Pervious Area: 0 Total Impervious Area: 0 Mitigated Landuse Totals for POC #4 Total Pervious Area: 1.306 Total Impervious Area: 2.114 Flow Frequency Method: Log Pearson Type Ill 17B Flow Frequency Return Periods for Predeveloped. POC #4 Return Period Flow(cfs) 2 year O 5 year O 10 year 0 25 year 0 50 year 0 100year 0 Flow Frequency Return Periods for Mitigated. POC #4 Return Period Flow(cfs) 2 year 0 5 year 0 10 year O 25 year O 50 year 0 100 year 0 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #4 Year Predeveloped Mitigated Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #4 Rank Predeveloped Mitigated Renton -Anacortes WQ -Build-Out -till 5nt2013 3:12:17 PM Page 34 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:19 PM Page 35 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:19 PM Page 36 POC5 ~--~--~-~--~--~,< •+--- " • • • + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #5 Total Pervious Area: O Total Impervious Area: 0 Mitigated Landuse Totals for POC #5 Total Pervious Area: 0.73 Total Impervious Area: 2.188 Flow Frequency Method: Log Pearson Type Ill 17B Flow Frequency Return Periods for Predeveloped. POC #5 Return Period Flow(cfs) 2 year 0 5 year O 10 year O 25 year 0 50 year O 100 year O Flow Frequency Return Periods for Mitigated. POC #5 Return Period Flow(cfs) 2 year O 5year O 10 year 0 25 year O 50 year 0 100 year O Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #5 Year Predeveloped Mitigated Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #5 Rank Predeveloped Mitigated Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:19 PM Page 38 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Build-Out -till 5/712013 3:12:20 PM Page 39 • 0.0000 0 u 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:20 PM Page40 Water Quality Water Quality BMP Flow and Volume for POC #5 On-line facility volume: 0.341 acre-feet On-line facility target flow: 0.4351 cfs. Adjusted for 15 min: 0.4351 cfs. Off-line facility target flow: 0.2429 cfs. Adjusted for 15 min: 0.2429 cfs. Renton -Anacortes WO -Build-Out -till 517/2013 3:12:20 PM Page 41 Model Default Mou,fications Total of O c hanges have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND ch anges have been made . Renton -Anacortes WQ -Bui ld -Out -till 5/712013 3:12 :20 PM Page 42 Appendix Predeveloped Schematic IJ I II '! , R enton -Anacortes WQ -Bu il d-Out -till I ' 517/2013 3:12 :20 PM Page 43 Mitigated Schematic Renton -An acortes WO -Bu ild-Out -ti ll 5/7/2013 3 :12:20 PM Page 44 Predeveloped UGI File Renton -Anacorte s WO -Build-Out -till 5/7/2013 3 :12:21 PM Page 45 Mitigated UC/ File RUN GLOBAL WWHM4 START model simulation 1948 10 01 OUTPUT LEVEL RUN INTERP RESUME 0 RUN l END GLOBAL FILES END 2009 09 30 3 0 UNIT SYSTEM 1 <File> <Un#> <-ID-> <-----------File Name------------------------------>*** WDM 26 MESSU 25 END FILES 27 28 30 31 32 33 34 OPN SEQUENCE Renton - MitRenton MitRenton MitRenton POCRenton POCRenton POCRenton POCRenton POCRenton Anacortes WQ -Anacortes -Anacortes -Anacortes -Anacortes -Anacortes -Anacortes -Anacortes -Anacortes INGRP PERLND PERLND IMPLND IMPLND RCHRES RCHRES RCHRES COPY COPY COPY COPY COPY COPY COPY COPY COPY COPY COPY DISPLY DISPLY DISPLY DISPLY INDELT 00,15 16 17 1 2 1 2 3 503 505 4 504 604 2 502 602 1 501 601 3 5 4 2 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFOl -Build-Out -till. wdm WQ -Build-Out -till. MES WQ Build-Out till. L61 WQ -Build-Out till. L62 WQ -Build-Out till 1. dat WQ -Build-Out -till2. dat WQ -Build-Out till3. dat WQ -Build-Out -till4. dat WQ Build-Out -tills. dat # #<----------Title----------->***TRAN PIVL DIGl FILl PYR 3 Ridgely 5 Redeveloped 4 Ridgely Pond 2 Duvall Vault 1 NE 10th Street/Anacortes END DISPLY-INFOl END DISPLY COPY TIMESERIES # -# NPT 1 1 503 1 505 1 4 1 504 l NMN l 1 l 1 l ••• Renton -Anacortes WQ -Build-Out -till MAX 1 MAX l MAX l MAX 1 MAX 1 5/7/2013 3:12:21 PM ••• DIG2 2 2 2 2 2 FIL2 YRND 32 9 34 9 33 9 31 9 30 9 Page 46 604 1 1 2 1 1 502 1 1 602 1 1 501 1 1 601 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer*** # -# User t-series Engl Metr *** in out *** 16 C, Lawn, Flat 1 1 1 1 27 0 17 C, Lawn, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # -# ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC 16 0 0 1 0 0 0 0 0 0 0 0 0 17 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** # -# ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC 16 0 0 4 0 0 0 0 0 0 0 0 0 17 0 0 4 0 0 0 0 0 0 0 0 0 END PRINT-INFO PWAT-PARMl <PLS > PWATER variable monthly parameter value flags *** # -# CSNO RTOP UZFG vcs vuz VNN VIFW VIRC 16 0 0 17 0 0 END PWAT-PARMl PWAT-PARM2 <PLS > # -# 16 PWATER ***FOREST 17 END PWAT-PARM2 PWAT-PARM3 <PLS > 0 0 PWATER # -# ***PETMAX 16 0 17 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER # -# CEPSC 16 0.1 17 0.1 END PWAT-PARM4 PWAT-STATEl 0 0 0 0 0 0 0 0 input info: Part 2 LZSN INF I LT 4.5 0.03 4.5 0.03 input info: Part 3 PETMIN INFEXP 0 2 0 2 input info: Part 4 UZSN NSUR 0.25 0.25 0.25 0.25 0 0 0 0 LSUR 400 400 INFILD 2 2 INTFW 6 6 VLE INFC *** *** 0 0 0 0 SLSUR 0.05 0.1 DEEPFR 0 0 IRC 0.5 0.5 <PLS >***Initial conditions at start of simulation HWT 0 0 *** KVARY 0.5 0.5 BASETP 0 0 LZETP 0 .25 0.25 ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** Renton -Anacortes WO -Build-Out -till 517/2013 3:12:21 PM *** PIVL PYR ********* *** *** 1 1 9 9 AGWRC 0 .996 0.996 AGWETP 0 0 Page47 # # *** CEPS 16 0 17 0 END PWAT-STATEl END PERLND IMPLND GEN-INFO SURS 0 0 <PLS ><-------Name-------> # # 1 2 END ROADS/FLAT ROADS/MOD GEN-INFO *** Section !WATER*** ACTIVITY uzs 0 0 IFWS 0 0 Unit-systems Printer User t-series Engl Metr 1 1 in 1 1 out 1 1 27 27 0 0 LZS 2.5 2.5 *** *** *** AGWS 1 1 <PLS > ************* Active Sections ***************************** # -# ATMP SNOW IWAT SLD IWG IQAL *** 1 0 0 1 0 0 0 2 0 0 l 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # -# ATMP SNOW IWAT SLD IWG IQAL ********* l 0 0 4 0 0 0 1 9 2 0 0 4 0 0 0 1 9 END PRINT-INFO IWAT-PARMl <PLS > !WATER variable monthly parameter value flags *** # -# CSNO RTOP VRS VNN RTLI *** 1 0 0 0 0 0 2 0 0 0 0 0 END IWAT-PARMl IWAT-PARM2 <PLS # - 1 2 > # *** END IWAT-PARM2 IWAT-PARM3 IWATER LSUR 400 400 <PLS > # -# 1 IWATER ***PETMAX 0 2 0 END IWAT-PARM3 IWAT-STATEl input info: SLSUR 0.01 0.05 input info: PETMIN 0 0 Part 2 NSUR 0.1 0.1 Part 3 RETSC 0.1 0.08 *** *** <PLS > *** # -# *** 1 Initial RETS conditions at start of simulation SURS 2 END IWAT-STATEl END IMPLND SCHEMATIC <-Source-> <Name> # Duvall*** PERLND 16 PERLND 16 PERLND 17 PERLND 17 IMPLND 1 0 0 Renton -Anacortes WQ -Build-Out -till 0 0 <--Area--> <-Target-> <-factor-> <Name> # 0.205 RCHRES 2 0.205 RCHRES 2 0.205 RCHRES 2 0.205 RCHRES 2 0.42 RCHRES 2 5/7/2013 3:12:21 PM MBLK Tbl# 2 3 2 3 5 *** *** GWVS 0 0 Page 48 IMPLND 2 0.42 RCHRES 2 5 Ridgely*** PERLND 16 0.653 RCHRES 1 2 PERLND 16 0.653 RCHRES 1 3 PERLND 17 0.653 RCHRES 1 2 PERLND 17 0.653 RCHRES 1 3 IMPLND 1 1.057 RCHRES 1 5 IMPLND 2 1. 057 RCHRES 1 5 Undetained Basin*** PERLND 16 3.239 RCHRES 3 2 PERLND 16 3.239 RCHRES 3 3 PERLND 17 3.419 RCHRES 3 2 PERLND 17 3.419 RCHRES 3 3 IMPLND 1 2.237 RCHRES 3 5 IMPLND 2 2.357 RCHRES 3 5 Redeveloped*** PERLND 16 0.355 RCHRES 3 2 PERLND 16 0.355 RCHRES 3 3 PERLND 17 0.375 RCHRES 3 2 PERLND 17 0.375 RCHRES 3 3 IMPLND 1 1.064 RCHRES 3 5 IMPLND 2 1.124 RCHRES 3 5 Ridgely*** PERLND 16 0.653 COPY 503 12 PERLND 16 0.653 COPY 503 13 PERLND 17 0.653 COPY 503 12 PERLND 17 0.653 COPY 503 13 IMPLND 1 1.057 COPY 503 15 IMPLND 2 1.057 COPY 503 15 Undetained Basin*** PERLND 16 3.239 COPY 502 12 PERLND 16 3.239 COPY 602 12 PERLND 16 3.239 COPY 502 13 PERLND 16 3.239 COPY 602 13 PERLND 17 3.419 COPY 502 12 PERLND 17 3.419 COPY 602 12 PERLND 17 3. 419 COPY 502 13 PERLND 17 3.419 COPY 602 13 IMPLND 1 2.237 COPY 502 15 IMPLND 1 2.237 COPY 602 15 IMPLND 2 2.357 COPY 502 15 IMPLND 2 2.357 COPY 602 15 Redeveloped*** PERLND 16 0.355 COPY 505 12 PERLND 16 0.355 COPY 505 13 PERLND 17 0.375 COPY 505 12 PERLND 17 0.375 COPY 505 13 IMPLND 1 1.064 COPY 505 15 IMPLND 2 1.124 COPY 505 15 ******Routing****** PERLND 16 0.205 COPY 2 12 PERLND 17 0.205 COPY 2 12 IMPLND 1 0.42 COPY 2 15 IMPLND 2 0.42 COPY 2 15 PERLND 16 0.205 COPY 2 13 PERLND 17 0.205 COPY 2 13 PERLND 16 0.653 COPY 4 12 PERLND 17 0.653 COPY 4 12 IMPLND 1 1. 057 COPY 4 15 IMPLND 2 1. 057 COPY 4 15 PERLND 16 0.653 COPY 4 13 PERLND 17 0.653 COPY 4 13 RCHRES 1 1 COPY 1 16 RCHRES 1 RCHRES 3 6 RCHRES 2 1 COPY 1 16 RCHRES 2 RCHRES 3 6 PERLND 16 3.239 COPY 1 12 PERLND 17 3.419 COPY 1 12 IMPLND 1 2.237 COPY 1 15 Renton -Anacortes WQ -Build-Out -till 51712013 3:12:21 PM Page49 IMPLND 2 2.357 COPY 1 15 PERLND 16 3.239 COPY 1 13 PERLND 17 3.419 COPY 1 13 PERLND 16 0.355 COPY 1 12 PERLND 17 0.375 COPY 1 12 IMPLND 1 1. 064 COPY 1 15 IMPLND 2 1.124 COPY 1 15 PERLND 16 0.355 COPY 1 13 PERLND 17 0.375 COPY 1 13 RCHRES 1 1 COPY 504 16 RCHRES 2 1 COPY 502 16 RCHRES 3 1 COPY 501 16 END SCHEMATIC NETWORK <-Volume-> < -Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # COPY 503 OUTPUT MEAN 1 1 48 .4 DISPLY 3 INPUT TIMSER 1 COPY 505 OUTPUT MEAN 1 1 48.4 DISPLY 5 INPUT TIMSER 1 COPY 504 OUTPUT MEAN 1 1 48 .4 DISPLY 4 INPUT TIMSER 1 COPY 502 OUTPUT MEAN 1 1 48 .4 DISPLY 2 INPUT TIMSER 1 COPY 501 OUTPUT MEAN 1 1 48.4 DIS PLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <Name> # <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> <Name># #<-factor->strg <Name> # # <Name>## END NETWORK RCHRES GEN-INFO RCHRES Name Nexits # -#<------------------><---> 1 2 3 END Ridgely Pond0015 Duvall Vault0016 NE 10th Street/A0018 GEN-INFO *** Section RCHRES*** ACTIVITY 1 1 1 Unit Systems Printer user T-series Engl Metr LKFG in out 1 1 1 28 0 1 1 1 1 28 0 1 1 1 1 28 0 1 <PLS > ************* Active Sections ***************************** ii -# HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 3 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR *** *** *** *** *** *** *** # -# HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 2 4 0 0 0 0 0 3 4 0 0 0 0 0 END PRINT-INFO HYDR-PARMl RCHRES Flags for each HYDR Section # -# VC Al A2 A3 ODFVFG for each*** FG FG FG FG possible exit *** * * * * * * * * * 1 0 1 0 0 2 0 1 0 0 3 0 1 0 0 END HYDR-PARMl HYDR-PARM2 # -# FTABNO 4 0 0 4 0 0 4 0 0 LEN 0 0 0 0 0 0 DELTH 0 0 0 0 0 0 0 0 0 0 0 0 ODGTFG for each possible exit * * * * * 0 0 0 0 0 0 STCOR 0 0 0 0 0 0 0 0 0 KS 1 9 1 9 1 9 FUNCT for possible *** 2 2 2 2 2 2 2 2 2 DB50 <------><--------><--------><--------><--------><--------><--------> 1 1 0.02 0.0 0.0 0.5 0.0 Renton -Anacortes WO -Build-Out -till 517/2013 3:12:21 PM *** each exit 2 2 2 2 2 2 *** *** Page 50 2 2 0.01 0.0 0.0 0.::, 0.0 3 3 0.04 0.0 406.0 0.5 0.0 END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** Initial value of OUTDGT for each possible exit # -# *** VOL Initial value of COLIND *** ac-ft for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> 1 0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 a.a a.a 2 0 4.0 0.0 0.0 0.0 a.a 0.0 0.0 a.a 0.0 0.0 3 0 4.0 0.0 0.0 0.0 0.0 0.0 a.a a.a a.a a.a END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 1 91 4 Depth Area Volume Outflowl Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.055207 0.000000 0.000000 0.066667 0.056066 0.003709 0.020062 0.133333 0. 056929 0.007476 0.028372 0.200000 0.057795 0.011300 0.034748 0.266667 0.058664 0.015182 0.040124 0.333333 0.059537 0.019122 0.044860 0.400000 0.060413 0.023120 0. 049141 0.466667 0.061292 0.027177 0.053079 0.533333 0.062174 0.031292 0.056743 0.600000 0.063060 0.035467 0.060185 0.666667 0.063949 0.039701 0.06344i 0.733333 0.064841 0.043994 0.066538 0.800000 0.065737 0.048346 0.069496 0.866667 0.066635 0.052759 0.072334 0.933333 0.067537 0.057231 0.075064 1.000000 0.068443 0.061764 0.077699 1.066667 0.069351 0.066357 0.080247 1.133333 0.070263 a. 071011 0.082717 1.200000 0.071178 0.075725 0. 085115 1.266667 0.072096 0.080501 0.087447 1.333333 0.073018 0.085338 0.089719 1.400000 0.073943 0.090237 0.091935 1.466667 0.074871 0.095197 0.094098 1.533333 0.075802 0.100220 0.096213 1.600000 0.076737 0.105305 0.098282 1.666667 0.077675 a .110452 0.100309 1.733333 0.078616 0.115661 0.102296 1.800000 0.079560 0.120934 0.104244 1.866667 0.080508 0.126269 0.106157 1.933333 0.081459 0.131668 0.108036 2.000000 0.082413 0.137131 0.109883 2.066667 a. 083371 a .142657 a .111699 2.133333 0.084332 0.148247 a .113487 2.200000 0.085296 0.153901 0 .115246 2.266667 0.086263 0.159620 a .116979 2.333333 0.087233 0.165403 0.118687 2.400000 0.088207 0.171251 0.120371 2.466667 0.089184 0.177164 0.122031 2.533333 0.090165 0.183142 0.123669 2.600000 0.091148 0.189186 0.125286 2.666667 0.092135 0.195296 0.126882 2.733333 0.093125 0.201471 0.128458 2.800000 0.094119 0.207712 0 .130015 2.866667 a. 095115 0.214020 0.131554 2.933333 0.096115 0.220395 0.133075 3.000000 a. 097119 0.226836 0.134579 3.066667 0.098125 0.233344 0.136066 3 .133333 0.099135 0.239919 0.137537 3.200000 0.100148 0.246562 a .138992 Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:21 PM Page 51 3.266667 0 .101164 o.,,3272 0.140433 3.333333 0.102184 0.260051 0.141858 3.400000 0.103206 0.266897 0.157562 3.466667 0.104232 0.273811 0.166499 3.533333 0.105262 0.280795 0.173419 3.600000 0.106294 0.287846 0.179382 3.666667 0.107330 0.294967 0.184750 3.733333 0.108369 0.302157 0.189702 3.800000 0.109412 0.309417 0.194339 3.866667 0.110457 0.316746 0.198729 3.933333 0 .111506 0.324144 0.202914 4.000000 0.112558 0.331613 0.206929 4.066667 0 .113614 0.339152 0. 210796 4.133333 0 .114673 0.346762 0.214536 4.200000 0 .115734 0.354442 0.218163 4.266667 0 .116800 0.362193 0.221689 4.333333 0 .117868 0.370015 0.225124 4.400000 0 .118940 0.377909 0.228477 4.466667 0.120015 0.385874 0.231754 4.533333 0.121093 0.393911 0.234962 4.600000 0.122175 0.402020 0.238106 4.666667 0.123260 0.410201 0.241190 4.733333 0.124348 0.418455 0.244219 4.800000 0.125439 0.426781 0.247195 4.866667 0.126534 0.435180 0.250122 4.933333 0.127632 0.443652 0.253004 5.000000 0.128733 0.452198 0.255842 5.066667 0.129837 0.460817 0.426278 5.133333 0.130945 0.469510 0.735553 5.200000 0.132056 0.478276 1.135199 5.266667 0.133170 0.487117 1.607920 5.333333 0.134288 0.496032 2.143723 5.400000 0 .135408 0.505022 2.735864 5.466667 0.136532 0.514087 3.379392 5.533333 0.137660 0.523227 4.070473 5.600000 0.138790 0.532442 4.806021 5.666667 0.139924 0.541732 5.583485 5.733333 0.141061 0.551098 6.400705 5.800000 0.142201 0.560540 7.255829 5.866667 0 .143345 0.570059 8 .147239 5.933333 0.144492 0.579653 9.073510 6.000000 0.145642 0.589324 10. 03337 END FTABLE 1 FTABLE 2 92 4 Depth Area Volume Outflowl Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.026033 0.000000 0.000000 0 .139556 0.026033 0.003633 0.002453 0.279111 0.026033 0.007266 0.003469 0.418667 0.026033 0.010899 0.004248 0.558222 0.026033 0.014532 0.004906 0.697778 0.026033 0.018165 0.005485 0.837333 0.026033 0.021798 0.006008 .0.976889 0.026033 0.025431 0.006490 1.116444 0.026033 0.029064 0.006938 1.256000 0.026033 0.032698 0.007359 1.395556 0.026033 0.036331 0.007757 1. 535111 0.026033 0.039964 0.008135 1.674667 0.026033 0.043597 0.008497 1. 814222 0.026033 0.047230 0.008844 1.953778 0.026033 0.050863 0.009178 2.093333 0.026033 0.054496 0.009500 2.232889 0.026033 0.058129 0.009811 2.372444 0.026033 0.061762 0. 010113 2.512000 0.026033 0.065395 0.010407 2.651556 0.026033 0.069028 0.010692 2. 791111 0.026033 0.072661 0.010970 2.930667 0.026033 0.076294 0.011240 3.070222 0.026033 0.079927 0.011505 Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:21 PM Page 52 3.209778 0.026033 0.083560 0.011763 3.349333 0.026033 0. 087193 0.012017 3.488889 0.026033 0.090826 0.012264 3.628444 0.026033 0.094460 0.012507 3.768000 0.026033 0.098093 0.012745 3.907556 0.026033 0.101726 0.012979 4. 047111 0.026033 0.105359 0.013209 4.186667 0.026033 0.108992 0.013435 4.326222 0.026033 0.112625 0.013657 4.465778 0.026033 0.116258 0. 013875 4.605333 0.026033 0.119891 0.014091 4.744889 0.026033 0.123524 0.014303 4.884444 0.026033 0 .127157 0. 014511 5.024000 0.026033 0 .130790 0.014717 5.163556 0.026033 0 .134423 0.014920 5.303111 0.026033 0 .138056 0.015120 5.442667 0.026033 0.141689 0.015318 5.582222 0.026033 0.145322 0. 015513 5.721778 0.026033 0 .148955 0.015706 5.861333 0.026033 0.152588 0. 015896 6.000889 0.026033 0.156221 0.016084 6 .140444 0.026033 0.159855 0.016270 6.280000 0.026033 0.163488 0.016454 6.419556 0.026033 0.167121 0.016636 6. 559111 0.026033 0.170754 0.021705 6.698667 0.026033 0.174387 0.025957 6.838222 0.026033 0.178020 0.028864 6.977778 0.026033 0.181653 0.031243 7.117333 0.026033 0.185286 0.033316 7.256889 0.026033 0.188919 0.035182 7. 396444 0.026033 0.192552 0.036896 7.536000 0.026033 0 .196185 0.038492 7.675556 0.026033 0.199818 0.039993 7. 815111 0.026033 0.203451 0. 041415 7.954667 0.026033 0.207084 0.042771 8.094222 0.026033 0.210717 0.044070 8.233778 0.026033 0.214350 0.045318 8.373333 0.026033 0.217983 0.046522 8.512889 0.026033 0.221617 0.047686 8.652444 0.026033 0.225250 0.048815 8.792000 0.026033 0.228883 0.049912 8.931556 0.026033 0.232516 0.050979 9. 071111 0.026033 0. 236149 0.052019 9.210667 0.026033 0.239782 0.053034 9.350222 0.026033 0.243415 0.054026 9.489778 0.026033 0.247048 0. 054996 9.629333 0.026033 0.250681 0.055946 9.768889 0.026033 0. 254314 0.056878 9.908444 0.026033 0.257947 0.057792 10.04800 0.026033 0.261580 0.058689 10.18756 0.026033 0.265213 0.059571 10.32711 0.026033 0.268846 0.060438 10.46667 0.026033 0.272479 0.061291 10.60622 0.026033 0.276112 0.062131 10.74578 0.026033 0.279745 0.062957 10.88533 0.026033 0.283379 0.063772 11.02489 0.026033 0.287012 0.064575 11.16444 0.026033 0.290645 0.065368 11. 30400 0.026033 0.294278 0.066149 11.44356 0.026033 0.297911 0.066921 11. 58311 0.026033 0.301544 0.067682 11. 72267 0.026033 0.305177 0.068435 11.86222 0.026033 0.308810 0.069178 12.00178 0. 026033 0.312443 0.069913 12.14133 0.026033 0.316076 0.296539 12.28089 0.026033 0.319709 1.082413 12.42044 0.026033 0.323342 2.179588 12.56000 0.026033 0.326975 3.516027 12.69956 0.026033 0.330608 5.054641 END FTABLE 2 Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:21 PM Page 53 FTABLE 91 4 Depth (ft) 0.000000 0.072222 0 .144444 0.216667 0.288889 0.361111 0.433333 0.505556 o. 577778 0.650000 0.722222 0.794444 0.866667 0.938889 1. 011111 1.083333 1.155556 1.227778 1.300000 1. 372222 1.444444 1.516667 1.588889 1. 661111 1.733333 1.805556 1. 877778 1.950000 2. 022222 2.094444 2.166667 2.238889 2. 311111 2.383333 2.455556 2.527778 2.600000 2.672222 2. 744444 2.816667 2.888889 2. 961111 3.033333 3.105556 3.177778 3.250000 3.322222 3.394444 3.466667 3.538889 3. 611111 3.683333 3.755556 3.827778 3.900000 3.972222 4.044444 4 .116667 4.188889 4. 261111 4.333333 4.405556 4.477778 4.550000 4.622222 4.694444 3 Area (acres) 0.235537 0.237969 0.240409 0.242858 0.245315 0.247781 0.250256 0.252740 0.255232 0.257732 0.260241 0.262759 0.265286 0.267821 0.270364 0.272917 0.275478 0.278047 0.280625 0.283212 0.285808 0.288412 0.291024 0.293646 0.296275 0.298914 0.301561 0.304217 0.306881 0.309554 0.312236 0. 314926 0.317625 0.320333 0.323049 0.325774 0.328507 0.331249 0.333999 0.336759 0.339527 0.342303 0.345088 0.347882 0.350684 0.353495 0.356315 0.359143 0.361980 0.364825 0.367679 0.370542 0.373413 0.376293 0.379182 0.382079 0.384985 0.387899 0.390822 0.393754 0. 396694 0.399643 0 .402601 0.405567 0.408542 0 .411525 Volume (acre-ft) 0.000000 0.017099 0.034374 0.051825 0.069453 0.087260 0.105244 0.123408 0.141751 0.160275 0.178980 0.197866 0.216934 0.236185 0.255620 0.275238 0.295041 0.315030 0.335204 0.355565 0.376113 0. 396848 0.417772 0.438886 0.460188 0 .481681 0.503365 0.525240 0.547308 0.569568 0.592022 0.614669 0.637511 0.660549 0.683782 0.707211 0.730838 0.754663 0.778686 0.802907 0.827329 0.851950 0.876773 0.901797 0.927023 0.952452 0.978084 1. 003920 1.029960 1.056206 1.082657 1.109315 1.136180 1.163253 1.190534 1.218024 1. 245724 1. 273633 1.301754 1.330086 1. 358630 1.387386 1.416356 1.445540 1.474939 1. 504552 Renton -Anacortes WQ -Build-Out -till Outflowl (cfs) 0.000000 0.015881 0.022459 0.027507 0.031762 0.035511 0.038900 0.042017 0.044918 0.047643 0.050220 0.052671 0.055013 0.057260 0 .059421 0.061507 0.063524 0. 065479 0.067377 0.069224 0.071022 0.072776 0.074488 0.076162 0. 077801 0.079405 0.080977 0.082520 0.084034 0.085522 0.086984 0.088421 0.089836 0.091229 0.092601 0.093953 0.095286 0.096600 0.097897 0.099177 0.100440 0.101688 0.102920 0.104138 0.105342 0.106533 0 .107710 0.108874 0 .110027 0 .111167 0.112295 0 .113413 0 .114519 0 .115615 0 .116701 0.117776 0.118842 0 .119899 0.120946 0.121984 0.123013 0.124034 0.125047 0.220016 0.273959 0.313337 Velocity (ft/sec) Travel Time*** (Minutes)*** 5/7/2013 3:12:21 PM Page 54 4.766667 0.414517 1.5..:i<±3Bl 0.346019 4.838889 0.417518 1. 564427 0.374620 4. 911111 0.420527 1. 594690 0.400396 4.983333 0.423545 1.625170 0.424065 5.055556 0.426571 1. 655869 0.446085 5.127778 0.429606 1. 686786 0.466768 5.200000 0.432650 1.717923 0.486338 5.272222 0.435703 1. 749280 0.504962 5.344444 0.438763 1.780858 0.522771 5.416667 0.441833 1.812658 0.539865 5.488889 0.444911 1.844679 0.556328 5. 561111 0.447998 1. 876923 0.719355 5.633333 0.451094 1. 909390 1.061775 5.705556 0.454198 1.942081 1. 510177 5.777778 0.457310 1.974997 2.042865 5.850000 0.460432 2. 008138 2.647767 5.922222 0.463562 2.041504 3.316888 5.994444 0.466700 2.075097 4.044422 6.066667 0.469848 2.108917 4.825906 6.138889 0.473003 2.142964 5.657768 6. 211111 0.476168 2.177240 6.537068 6.283333 0.479341 2.211744 7.461328 6.355556 0.482523 2.246478 8.428422 6.427778 0.485713 2.281442 9.436503 6.500000 0.488912 2.316637 10.48394 END FTABLE 3 END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <Name> # <Name> WDM 2 PREC WDM 2 PREC WDM 1 EVAP WDM 1 EVAP END EXT SOURCES EXT TARGETS <-Volume-> < -Grp> <Name> # COPY 3 OUTPUT COPY 503 OUTPUT COPY 603 OUTPUT RCHRES 1 HYDR RCHRES 1 HYDR # tern strg<-factor->strg ENGL 1.167 ENGL 1.167 ENGL 0.76 ENGL 0.76 <-Member-><--Mult-->Tran <Name> # #<-factor->strg MEAN 1 1 48.4 MEAN 1 1 48 .4 MEAN 1 1 48 .4 RO 1 1 1 STAGE 1 1 1 COPY 4 OUTPUT MEAN 1 1 48.4 COPY 504 OUTPUT MEAN 1 1 48.4 COPY 604 OUTPUT MEAN 1 1 48.4 RCHRES 2 HYDR RO 1 1 1 RCHRES 2 HYDR STAGE 1 1 1 COPY 2 OUTPUT MEAN 1 1 48.4 COPY 502 OUTPUT MEAN 1 1 48.4 COPY 602 OUTPUT MEAN 1 1 48.4 RCHRES 3 HYDR RO 1 1 1 RCHRES 3 HYDR STAGE 1 1 1 COPY 1 OUTPUT MEAN 1 1 48.4 COPY 501 OUTPUT MEAN 1 1 48.4 COPY 601 OUTPUT MEAN 1 1 48.4 COPY 5 OUTPUT MEAN 1 1 48.4 COPY 505 OUTPUT MEAN 1 1 48.4 COPY 605 OUTPUT MEAN 1 1 48.4 END EXT TARGETS MASS-LINK <Volume> <Name> MASS-LINK <-Grp> <-Member-><--Mult--> <Name># #<-factor-> 2 PERLND PWATER END MASS-LINK SURO 2 0.083333 <-Target vols> <-Grp> <-Member-> *** <Name> # PERLND 1 IMPLND 1 PERLND 1 IMPLND 1 <-Volume-> <Name> # WDM 703 WDM 803 WDM 903 WDM 1006 WDM 1007 WDM 704 WDM 804 WDM 904 WDM 1008 WDM 1009 WDM 702 WDM 802 WDM 902 WDM 1010 WDM 1011 WDM 701 WDM 801 WDM 901 WDM 705 WDM 805 WDM 905 <Target> <Name> RCHRES # <Name> # # *** 999 EXTNL PREC 999 EXTNL PREC 999 EXTNL PETINP 999 EXTNL PETINP <Member> Tsys Tgap Amd *** <Name> tern strg strg*** FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL STAG ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL STAG ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL STAG ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL FLOW ENGL REPL <-Grp> <-Member->*** <Name>##*** INFLOW IVOL Renton -Anacortes WQ -Build-Out -till 5/712013 3:12:21 PM Page 55 MASS-LINK 3 PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 3 MASS-LINK 5 IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 5 MASS-LINK 6 RCHRES ROFLOW RCHRES INFLOW END MASS-LINK 6 MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 MASS-LINK 16 RCHRES ROFLOW COPY INPUT MEAN END MASS-LINK 16 END MASS-LINK END RUN Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:21 PM Page 56 Predeveloped HSPF Mevvage File Renton -Anacortes WO -Build-Out • till 517/2013 3:12:21 PM Page 57 Mitigated HSPF Mess, ~ File Renton -Anacortes WO -Build-Out -till 517/2013 3:12:21 PM Page 58 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright© by : Clear Creek Solutions, Inc. 2005-2013; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1 (866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:21 PM Page 59 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 5.5551 5.1891 4.6486 4.5959 4.3512 4.2762 4.2427 4.2366 4.0586 4.0036 3.9001 3.6785 3.6755 3.5755 3.4475 3.3913 3.2817 3.2239 3.1584 3.1259 3.0889 3.0346 3.0326 3.0108 3.0105 2.9781 2.8248 2.8192 2.7914 2.7230 2.7114 2.6301 2.6247 2.6174 2.6096 2.6049 2.5805 2.5742 2.5597 2.5526 2.4991 2.4696 2.4258 2.4125 2.3820 2.3075 2.2734 2.2606 2.2228 2.2086 2.1628 2.1599 2.1531 2.0439 2.0238 1.9462 1.8553 7.9710 7.9115 7.3067 6.6795 5.8427 5.5997 5.5505 5.5270 5.3321 5.2581 5.2446 4.9631 4.6156 4.6060 4.5212 4.5005 4.3523 4.2997 4 .. 2698 4.2579 4.2106 4.1333 4.1241 3.9810 3.9264 3.9202 3.8615 3.7691 3.7610 3.7134 3.6155 3.6115 3.5848 3.5382 3.4652 3.4638 3.4019 3.3884 3.3795 3.3014 3.2691 3.2383 3.1918 3.1567 2.9372 2.8877 2.8563 2.7283 2.6335 2.5324 2.4528 2.4173 2.3965 2.2827 2.2283 2.1209 2.0617 Renton -Anacortes WO -Existing Land Use • till 5/712013 2:54:56 PM Page 24 Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:54:56 PM Page 25 Duration Flows Flow(cfs) Predev Mit Percentage Pass/Fail 1.4961 1438 2800 194 Fail 1.5489 1285 2509 195 Fail 1.6016 1151 2259 196 Fail 1.6544 1032 2057 199 Fail 1.7072 919 1872 203 Fail 1.7599 810 1723 212 Fail 1.8127 742 1575 212 Fail 1.8654 668 1453 217 Fail 1.9182 608 1350 222 Fail 1.9710 557 1231 221 Fail 2.0237 511 1130 221 Fail 2.0765 471 1038 220 Fail 2.1292 437 964 220 Fail 2.1820 412 892 216 Fail 2.2347 385 825 214 Fail 2.2875 360 767 213 Fail 2.3403 329 715 217 Fail 2.3930 304 661 217 Fail 2.4458 283 618 218 Fail 2.4985 259 578 223 Fail 2.5513 239 545 228 Fail 2.6041 218 513 235 Fail 2.6568 193 490 253 Fail 2.7096 186 463 248 Fail 2.7623 176 440 250 Fail 2.8151 165 421 255 Fail 2.8678 157 389 247 Fail 2.9206 146 363 248 Fail 2.9734 140 341 243 Fail 3.0261 128 325 253 Fail 3.0789 121 314 259 Fail 3.1316 114 299 262 Fail 3.1844 106 281 265 Fail 3.2371 103 266 258 Fail 3.2899 97 257 264 Fail 3.3427 92 246 267 Fail 3.3954 87 235 270 Fail 3.4482 83 226 272 Fail 3.5009 79 212 268 Fail 3.5537 76 202 265 Fail 3.6065 72 191 265 Fail 3.6592 65 178 273 Fail 3.7120 61 170 278 Fail 3.7647 61 165 270 Fail 3.8175 58 160 275 Fail 3.8702 56 154 275 Fail 3.9230 54 148 274 Fail 3.9758 51 141 276 Fail 4.0285 46 133 289 Fail 4.0813 43 131 304 Fail 4.1340 41 125 304 Fail 4.1868 38 123 323 Fail 4.2396 34 121 355 Fail 4.2923 32 117 365 Fail Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:54:56 PM Page 26 4.3451 30 115 383 Fail 4.3978 28 111 396 Fail 4.4506 28 109 389 Fail 4.5033 22 105 477 Fail 4.5561 21 96 457 Fail 4.6089 18 93 516 Fail 4.6616 17 89 523 Fail 4.7144 17 87 511 Fail 4.7671 16 81 506 Fail 4.8199 15 78 520 Fail 4.8727 15 78 520 Fail 4.9254 15 73 486 Fail 4.9782 14 66 471 Fail 5.0309 14 64 457 Fail 5.0837 14 63 450 Fail 5.1364 13 60 461 Fail 5.1892 13 58 446 Fail 5.2420 12 55 458 Fail 5.2947 12 52 433 Fail 5.3475 11 50 454 Fail 5.4002 10 49 490 Fail 5.4530 10 47 469 Fail 5.5058 9 46 511 Fail 5.5585 7 43 614 Fail 5.6113 7 41 585 Fail 5.6640 7 41 585 Fail 5.7168 5 39 780 Fail 5.7695 5 39 780 Fail 5.8223 5 38 760 Fail 5.8751 5 37 740 Fail 5.9278 5 36 720 Fail 5.9806 5 34 680 Fail 6.0333 5 33 660 Fail 6.0861 4 33 825 Fail 6.1389 4 31 775 Fail 6.1916 4 30 750 Fail 6.2444 3 29 966 Fail 6.2971 3 28 933 Fail 6.3499 3 26 866 Fail 6.4026 3 25 833 Fail 6.4554 3 25 833 Fail 6.5082 3 25 833 Fail 6.5609 3 25 833 Fail 6.6137 3 25 833 Fail 6.6664 2 23 1150 Fail 6.7192 2 21 1050 Fail The development has an increase in flow durations from 1/2 Predeveloped 2 year flow to the 2 year flow or more than a 10% increase from the 2 year to the 50 year flow. The development has an increase in flow durations for more than 50% of the flows for the range of the duration analysis. Renton -Anacortes WQ -Existing Land Use • till 51712013 2:54:56 PM Page 27 Water Quality Water Quality BMP Flow and Volume for POC #2 On-line facility volume: 1.363 acre-feet On-line facility target flow: 1.1034 cfs. Adjusted for 15 min: 1.1034 cfs. Off-line facility target flow: 0.6126 cfs. Adjusted for 15 min: 0.6126 cfs. Renton -Anacortes WQ -Existing Land Use -till 5/7/2013 2:54:56 PM Page 28 POC3 ' ! 5.41 ~ ~11 ---- 0 J l 280 -~--------- 1.5011JE-5 lOE-4 1DE-J TCE-2 10E·T ... '° ,oo + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #3 Total Pervious Area: O Total Impervious Area: 0 Mitigated Landuse Totals for POC #3 Total Pervious Area: 0 Total Impervious Area: O Flow Frequency Method: Log Pearson Type Ill 17B Flow Frequency Return Periods for Predeveloped. POC #3 Return Period Flow(cfs) 2 year 0 5 year O 10 year 0 25 year O 50 year O 100 year O Flow Frequency Return Periods for Mitigated. POC #3 Return Period Flow(cfs) 2 year O 5 year O 10 year O 25 year 0 50 year 0 100 year O Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #3 Year Predeveloped Mitigated Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #3 Rank Predeveloped Mitigated Renton -Anacortes WQ -Existing Land Use -till 5/7/2013 2:54:56 PM -------lu Page 29 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Existing Land Use -till 51712013 2:55:29 PM Page 30 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WO -Existing Land Use -till 517/2013 2:55:29 PM Page 31 Water Quality Water Quality BMP Flow and Volume for POC #3 On-line facility volume: 0.3012 acre-feet On-line facility target flow: 0.4294 cfs. Adjusted for 15 min: 0.4294 cfs. Off-line facility target flow: 0.2418 cfs. Adjusted for 15 min: 0.2418 cfs. Renton -Anacortes WQ -Existing Land Use -till 51712013 2:55:29 PM Page 32 POC4 lo.I "' U ---·--~--------1, ~.6 I 1 ~ 11) ,i Ill) oil XI Ill !Ol Iii !ill 91111,6 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #4 Total Pervious Area: 0 Total Impervious Area: 0 Mitigated Landuse Totals for POC #4 Total Pervious Area: O Total Impervious Area: 0 Flow Frequency Method: Log Pearson Type 111176 Flow Frequency Return Periods for Predeveloped. POC #4 Return Period Flow(cfs) 2 year O 5 year O 10 year 0 25 year O 50 year O 100 year O Flow Frequency Return Periods for Mitigated. POC #4 Return Period Flow(cfs) 2 year O 5 year 0 10 year 0 25 year 0 50 year 0 100 year O Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #4 Year Predeveloped Mitigated Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #4 Rank Predeveloped Mitigated Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:55:29 PM Page 33 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:55:47 PM Page 34 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:55:47 PM Page 35 Water Quality Water Quality BMP Flow and Volume for POC #4 On-line facility volume: 0.2057 acre-feet On-line facility target flow: 0.1124 cfs. Adjusted for 15 min: 0.1124 cfs. Off-line facility target flow: 0.0718 cfs. Adjusted for 15 min: 0.0718 cfs. Renton -Anacortes WO -Existing Land Use -till SrT/2013 2:55:47 PM Page 36 POC5 "' ' ' ' --------· -H 85 I 1 5 10 JO i10 SI I'! Ill '.II) 9!i ill! 9!I 9!16 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #5 Total Pervious Area: 0 Total Impervious Area: 0 Mitigated Landuse Totals for POC #5 Total Pervious Area: 0 Total Impervious Area: 0 Flow Frequency Method: Log Pearson Type Ill 17B Flow Frequency Return Periods for Predeveloped. POC #5 Return Period Flow(cfs) 2 year 0 5year 0 10 year O 25 year 0 50 year 0 100 year O Flow Frequency Return Periods for Mitigated. POC #5 Return Period Flow(cfs) 2 year 0 5 year 0 10 year O 25 year 0 50 year 0 100 year 0 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #5 Year Predeveloped Mitigated Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #5 Rank Predeveloped Mitigated Renton -Anacortes WO -Existing Land Use -till 517/2013 2:55:47 PM Page 37 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WQ -Existing Land Use -till 5/712013 2:55:52 PM Page 38 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass 0.0000 0 0 0 Pass Renton -Anacortes WO -Existing Land Use -till 517/2013 2:55:52 PM Page 39 Water Quality Water Quality BMP Flow and Volume for POC #5 On-line facility volume: 0.3105 acre-feet On-line facility target flow: 0.4423 cfs. Adjusted for 15 min: 0.4423 cfs. Off-line facility target flow: 0.2492 cfs. Adjusted for 15 min: 0.2492 cfs. Renton -Anacortes WQ -Existing land Use -till 5f7/2013 2:55:52 PM Page 40 Model Default Moa1r1cations Total of O changes have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND changes have been made. Renton -Anacortes WO -Existing Land Use -till 5/712013 2:55:52 PM Page 41 Appendix Predeveloped Schematic Renton ~ Anacortes WO. Existing Land Use~ till 5/7/2013 2:55:52 PM -,./",. Page 42 Mitigated Schematic Renton -Anacortes WO -Existing Land Use -till 5/7/2013 2:55:53 PM Page 43 Predeveloped UGI File Renton -Anacortes WQ -Existing Land Use -till 51712013 2:55:53 PM Page 44 Mitigated UGI File RUN GLOBAL WWHM4 START model simulation l948 lO Ol OUTPUT LEVEL RUN INTERP RESUME 0 RUN l END GLOBAL FILES END 2009 09 30 3 0 UNIT SYSTEM l <-----------File Name------------------------------>*** <File> <Un#> <-ID-> WDM 26 MESSU 25 27 28 30 3l *** Renton -Anacortes WQ -Existing Land Use -till.wdrn MitRenton -Anacortes WQ Existing Land Use -till.MES MitRenton -Anacortes WQ Existing Land Use -till.L61 MitRenton Anacortes WQ -Existing Land Use -till.162 POCRenton -Anacortes WQ -Existing Land Use -tilll.dat POCRenton -Anacortes WQ -Existing Land Use -till2.dat END FILES OPN SEQUENCE INGRP PERLND PERLND IMPLND IMPLND RCHRES RCHRES RCHRES COPY COPY COPY COPY COPY COPY DISPLY DISPLY END INGRP END OPN SEQUENCE DISPLY DISPLY-INFOl 16 l7 1 2 1 2 3 2 502 602 1 501 601 2 1 INDELT OO:l5 # -#<----------Title----------->***TRAN PIVL DIGl FILl PYR DIG2 2 Ridgely 1 NE 10th END DISPLY-INFOl END DISPLY COPY TIMESERIES # -# NPT l l 2 l NMN l 1 502 l 602 1 50l 1 60l 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM l l 1 1 Pond Street/Anacortes *** # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Renton -Anacortes WO -Existing Land Use -till MAX MAX Unit-systems 5/712013 2:55:53 PM 1 2 l 2 Printer*** FIL2 3l 30 YRND 9 9 Page45 # # User t-series Engl Metr *** in out *** 16 C, Lawn, Flat 1 1 1 1 27 0 17 C, Lawn, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS # - 16 >*************Active # ATMP SNOW PWAT SED Sections PST PWG 0 0 0 0 ***************************** 0 0 1 0 17 0 0 1 0 END ACTIVITY PRINT-INFO PQAL 0 0 MSTL 0 0 PEST 0 0 NITR 0 0 PHOS 0 0 TRAC 0 0 <PLS > ***************** Print-flags ***************************** # -# ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC 16 0 0 4 0 0 0 0 0 0 0 0 0 17 0 0 4 0 0 0 0 0 0 0 0 0 END PRINT-INFO PWAT-PARMl <PLS > PWATER variable monthly parameter value flags *** # -# CSNO RTOP UZFG vcs vuz VNN VIFW VIRC VLE INFC 16 0 17 0 END PWAT-PARMl PWAT-PARM2 <PLS > 0 0 PWATER # -# 16 17 END ***FOREST 0 0 PWAT-PARM2 PWAT-PARM3 <PLS > PWATER # # ***PETMAX 16 0 17 0 END PWAT-PARM3 PWAT-PARM4 0 0 0 0 0 0 0 0 input info: Part 2 LZSN INFILT 4.5 0.03 4.5 0.03 input info: Part 3 PETMIN INFEXP 0 2 o 2 0 0 0 0 LSUR 400 400 INFILD 2 2 *** *** 0 0 0 0 SLSUR 0.05 0.1 DEEPFR 0 0 <PLS > PWATER input info: Part 4 # -# CEPSC 16 0.1 17 0.1 END PWAT-PARM4 PWAT-STATEl <PLS > *** Initial ran from # -# *** CEPS 16 o 17 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO UZSN NSUR INTFW 0.25 0.25 6 0.25 0.25 6 conditions at start of simulation 1990 to end of 1992 (pat 1-11-95) SURS uzs IFWS 0 o 0 0 0 0 <PLS ><-------Name-------> Unit-systems Printer User t-series Engl Metr # -# in out 1 ROADS/FLAT 1 1 1 27 o 2 ROADS/MOD 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY IRC 0.5 0.5 RUN LZS 2.5 2.5 *** *** *** HWT *** 21 0 0 KVARY 0.5 0.5 BASETP 0 0 LZETP 0.25 0.25 *** AGWS 1 1 <PLS >*************Active Sections***************************** Renton -Anacortes WO -Existing Land Use -till 5/712013 2:55:53 PM *** PIVL PYR ********* *** *** 1 1 9 9 AGWRC 0 .996 0.996 AGWETP 0 0 GWVS 0 o Page 46 # -# ATMP SNOW IWAT SLD IWG IQAL *** 1 0 0 1 0 0 0 2 0 0 1 0 0 a END ACTIVITY PRINT-INFO <!LS> ******** Print-flags ******** PIVL PYR # -# ATMP SNOW IWAT SLD IWG IQAL ********* 1 a 0 4 0 a 0 1 9 2 0 a 4 a a 0 1 9 END PRINT-INFO IWAT-PARMl <PLS > !WATER variable monthly parameter value flags *** # -# CSNO RTOP VRS VNN RTLI *** 1 a o o o a 2 a a a a a END IWAT-PARMl IWAT-PARM2 <PLS > # -# *** 1 2 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER LSUR 400 400 IWATER # -# 1 2 END ***PETMAX 0 a IWAT-PARM3 IWAT-STATEl input info: SLSUR 0.01 a.as input info: PETMIN a 0 Part 2 NSUR 0.1 0.1 Part 3 RETSC 0.1 0.08 *** *** <PLS # > *** # *** Initial RETS conditions SURS at start of simulation 1 a 0 2 a 0 END IWAT-STATEl END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK <Name> # <-factor-> <Name> # Tbl# Duvall*** PERLND 16 0.205 RCHRES 2 2 PERLND 16 0.205 RCHRES 2 3 PERLND 17 0.205 RCHRES 2 2 PERLND 17 0.205 RCHRES 2 3 IMPLND 1 0.42 RCHRES 2 5 IMPLND 2 0.42 RCHRES 2 5 Ridgely*** PERLND 16 0.653 RCHRES 1 2 PERLND 16 0.653 RCHRES 1 3 PERLND 17 0.653 RCHRES 1 2 PERLND 17 0.653 RCHRES 1 3 IMPLND 1 1. 057 RCHRES 1 5 IMPLND 2 1. 057 RCHRES 1 5 Undetained Basin*** PERLND 16 4.303 RCHRES 3 2 PERLND 16 4.303 RCHRES 3 3 PERLND 17 4.543 RCHRES 3 2 PERLND 17 4.543 RCHRES 3 3 IMPLND 1 2.592 RCHRES 3 5 IMPLND 2 2.732 RCHRES 3 5 Undetained Basin*** PERLND 16 4.303 COPY 502 12 PERLND 16 4.303 COPY 602 12 PERLND 16 4.303 COPY 502 13 Renton -Anacortes WQ -Existing Land Use -till 5f7/2013 2:55:53 PM *** *** Page 47 PERLND 16 4.303 COPY 602 13 PERLND 17 4. 543 COPY 502 12 PERLND 17 4.543 COPY 602 12 PERLND 17 4. 543 COPY 502 13 PERLND 17 4. 543 COPY 602 13 IMPLND 1 2.592 COPY 502 15 IMPLND 1 2.592 COPY 602 15 IMPLND 2 2.732 COPY 502 15 IMPLND 2 2.732 COPY 602 15 ******Routing****** PERLND 16 0.205 COPY 2 12 PERLND 17 0.205 COPY 2 12 IMPLND 1 0.42 COPY 2 15 IMPLND 2 0.42 COPY 2 15 PERLND 16 0.205 COPY 2 13 PERLND 17 0.205 COPY 2 13 PERLND 16 0.653 COPY 2 12 PERLND 17 0.653 COPY 2 12 IMPLND 1 1. 057 COPY 2 15 IMPLND 2 1. 057 COPY 2 15 PERLND 16 0.653 COPY 2 13 PERLND 17 0.653 COPY 2 13 RCHRES 1 1 COPY 1 16 RCHRES 1 RCHRES 3 6 RCHRES 2 1 COPY 1 16 RCHRES 2 RCHRES 3 6 PERLND 16 4.303 COPY 1 12 PERLND 17 4. 543 COPY 1 12 IMPLND 1 2.592 COPY 1 15 IMPLND 2 2.732 COPY 1 15 PERLND 16 4.303 COPY 1 13 PERLND 17 4.543 COPY 1 13 RCHRES 1 1 COPY 502 16 RCHRES 2 1 COPY 502 16 RCHRES 3 1 COPY 501 16 END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Mem.ber-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1 COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <Name> # <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> <Name># #<-factor->strg <Name> # # <Name>## END NETWORK RCHRES GEN-INFO RCHRES Name Nexits # -#<------------------><---> 1 2 3 END Ridgely Pond0022 Duvall Vault0023 NE 10th Street/A0025 GEN-INFO *** Section RCHRES*** ACTIVITY 1 1 1 Unit Systems User T-series in out 1 1 1 1 1 1 1 1 1 Printer Engl Metr LKFG 28 0 1 28 0 1 28 0 1 <PLS > ************* Active Sections ***************************** # -# HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 3 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO Renton -Anacortes WO -Existing Land Use -till 51712013 2:55:53 PM *** *** *** *** *** *** *** Page48 <PLS > ***************** Print-flags ******************* PIVL PYR # -# HYDR ADCA CONS HEAT SEO GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 0 0 0 0 1 9 2 4 0 0 0 0 0 0 0 0 0 1 9 3 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO HYDR-PARMl RCHRES Flags for each HYDR Section *** # -# VC Al A2 A3 ODFVFG for each*** ODGTFG for each FUNCT for each 1 2 3 FG FG FG FG possible exit *** * * * 0 1 0 0 1 0 0 1 0 * 0 0 0 * * * * * 4 0 0 0 0 4 0 0 0 0 4 0 0 0 0 END HYDR-PARMl HYDR-PARM2 # -# FTABNO LEN DELTH possible exit possible exit * * * * * *** 0 0 0 0 0 2 2 2 2 2 0 0 0 0 0 2 2 2 2 2 0 0 0 0 0 2 2 2 2 2 STCOR KS DESO <------><--------><--------><--------><--------><--------><--------> *** *** 1 2 3 END HYDR-PARM2 HYDR-INIT 1 2 3 0.02 0.01 0.04 0.0 0.0 0.0 0.0 0.0 406.0 0. 5 0. 0 0.5 0.0 0. 5 0. 0 RCHRES Initial conditions for each HYDR section *** Initial value of OUTDGT for each possible exit # -# *** VOL Initial value of COLIND *** ac-ft for each possible exit <------><--------> 1 0 2 0 3 0 END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 91 4 Depth (ft) 0.000000 0.066667 0.133333 0.200000 0.266667 0.333333 0.400000 0.466667 0.533333 0.600000 0.666667 0.733333 0.800000 0.866667 0.933333 1.000000 1.066667 1.133333 1.200000 1.266667 1.333333 1.400000 1.466667 1.533333 1. 600000 1.666667 1.733333 1.800000 1 Area (acres) 0.055207 0.056066 0.056929 0.057795 0.058664 0.059537 0.060413 0.061292 0.062174 0.063060 0.063949 0.064841 0.065737 0.066635 0.067537 0.068443 0.069351 0.070263 0.071178 0.072096 0.073018 0.073943 0.074871 0.075802 0.076737 0.077675 0.078616 0.079560 <---><---><---><---><---> 4.0 4.0 4.0 Volume (acre-ft) 0.000000 0.003709 0.007476 0.011300 0.015182 0.019122 0.023120 0.027177 0.031292 0.035467 0.039701 0.043994 0.048346 0.052759 0.057231 0.061764 0.066357 0. 071011 0. 075725 0.080501 0.085338 0.090237 0.095197 0.100220 0.105305 0. 110452 0.115661 0.120934 0.0 0.0 0.0 0.0 0.0 0.0 Outflowl (cfs) 0.000000 0.020062 0.028372 0.034748 0.040124 0.044860 0.049141 0.053079 0.056743 0.060185 0.063441 0.066538 0.069496 0.072334 0.075064 0.077699 0.080247 0.082717 0. 085115 0.087447 0.089719 0.091935 0.094098 0. 096213 0.098282 0.100309 0.102296 0.104244 0.0 0.0 0. 0 a.a 0.0 0.0 Velocity (ft/sec) *** <---><---><---><---><---> a.a o.o a.a o.o o.o a.a a.a o.o o.o o.o 0.0 0.0 0.0 0.0 0.0 Travel Time*** (Minutes)*** Renton -Anacortes WQ -Existing Land Use -till 5/7/2013 2:55:53 PM Page 49 1.866667 0.080508 0.126269 0.106157 1.933333 0. 081459 0.131668 0.108036 2.000000 0.082413 0.137131 0.109883 2.066667 0.083371 0 .142657 0.111699 2 .133333 0.084332 0.148247 0 .113487 2.200000 0.085296 0.153901 0 .115246 2.266667 0.086263 0.159620 0.116979 2.333333 0.087233 0.165403 0 .118687 2.400000 0.088207 0.171251 0.120371 2.466667 0.089184 0.177164 0.122031 2.533333 0.090165 0.183142 0.123669 2.600000 0.091148 0.189186 0.125286 2.666667 0. 092135 0.195296 0.126882 2.733333 0.093125 0 .201471 0.128458 2.800000 0.094119 0.207712 0.130015 2.866667 0.095115 0. 214020 0.131554 2.933333 o. 096115 0.220395 0.133075 3.000000 0.097119 0.226836 0.134579 3.066667 0.098125 0.233344 0.136066 3 .133333 0.099135 0.239919 0.137537 3.200000 0.100148 0.246562 0.138992 3.266667 o .101164 0.253272 0.140433 3.333333 0.102184 0.260051 0.141858 3.400000 0.103206 0.266897 0.157562 3.466667 0.104232 0.273811 0.166499 3.533333 0.105262 0.280795 0.173419 3.600000 0.106294 0.287846 0.179382 3.666667 0.107330 0.294967 0.184750 3.733333 0.108369 0.302157 0.189702 3.800000 0 .109412 0.309417 0.194339 3.866667 0 .110457 0.316746 0.198729 3.933333 0 .111506 0.324144 0.202914 4.000000 0.112558 0. 331613 0.206929 4.066667 0 .113614 0.339152 0. 210796 4.133333 0 .114673 0.346762 0.214536 4.200000 0 .115734 0.354442 0.218163 4.266667 0.116800 0.362193 0.221689 4.333333 0.117868 0.370015 0.225124 4.400000 0.118940 0.377909 0.228477 4.466667 0.120015 0.385874 0.231754 4.533333 0.121093 0.393911 0.234962 4.600000 0.122175 0.402020 0.238106 4.666667 0.123260 0.410201 0.241190 4.733333 0.124348 0.418455 0.244219 4.800000 0.125439 0.426781 0.247195 4.866667 0.126534 0.435180 0.250122 4.933333 0.127632 0.443652 0.253004 5.000000 0.128733 0.452198 0.255842 5.066667 0.129837 0.460817 0.426278 5.133333 0.130945 0.469510 0.735553 5.200000 0.132056 0.478276 1.135199 5.266667 0.133170 0.487117 1.607920 5.333333 0.134288 0.496032 2.143723 5.400000 0.135408 0.505022 2.735864 5.466667 0.136532 0.514087 3.379392 5.533333 0.137660 0.523227 4.070473 5.600000 0.138790 0.532442 4.806021 5.666667 0.139924 0.541732 5.583485 5.733333 0.141061 0.551098 6.400705 5.800000 0.142201 0.560540 7.255829 5.866667 0.143345 0.570059 8.147239 5.933333 0.144492 0. 579653 9.073510 6.000000 0.145642 0.589324 10.03337 END FTABLE 1 FTABLE 2 92 4 Depth Area Volume Outflowl Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.026033 0.000000 0.000000 0.139556 0.026033 0.003633 0.002453 Renton -Anaoortes WQ -Existing Land Use -till 51712013 2:55:53 PM Page 50 0. 279111 0.026033 0.007266 0. 003469 0.418667 0.026033 0.010899 0.004248 0.558222 0.026033 0.014532 0.004906 0.697778 0.026033 0.018165 0.005485 0.837333 0.026033 0.021798 0.006008 0.976889 0.026033 0.025431 0.006490 1.116444 0.026033 0.029064 0.006938 1. 256000 0.026033 0.032698 0.007359 1.395556 0.026033 0.036331 0.007757 1. 535111 0.026033 0.039964 0. 008135 1.674667 0.026033 0.043597 0.008497 1. 814222 0.026033 0.047230 0.008844 1. 953778 0.026033 0.050863 0.009178 2.093333 0.026033 0.054496 0.009500 2.232889 0.026033 0.058129 0.009811 2.372444 0.026033 0.061762 0. 010113 2.512000 0.026033 0.065395 0.010407 2.651556 0.026033 0.069028 0.010692 2. 791111 0.026033 0.072661 0.010970 2.930667 0.026033 0.076294 0. 011240 3.070222 0.026033 0.079927 0.011505 3 .209778 0.026033 0.083560 0.011763 3.349333 0.026033 0.087193 0.012017 3.488889 0.026033 0.090826 0.012264 3.628444 0.026033 0.094460 0.012507 3.768000 0.026033 0.098093 0.012745 3.907556 0.026033 0.101726 0.012979 4.047111 0.026033 0.105359 0.013209 4.186667 0.026033 0.108992 0.013435 4.326222 0.026033 0.112625 0.013657 4.465778 0.026033 0.116258 0.013875 4.605333 0.026033 0.119891 0.014091 4.744889 0.026033 0.123524 0.014303 4.884444 0.026033 0.127157 0.014511 5.024000 0.026033 0.130790 0.014717 5.163556 0.026033 0.134423 0.014920 5.303111 0.026033 0.138056 0.015120 5.442667 0.026033 0.141689 0.015318 5.582222 0.026033 0.145322 0. 015513 5.721778 0.026033 0 .148955 0.015706 5.861333 0.026033 0.152588 0.015896 6.000889 0.026033 0.156221 0.016084 6.140444 0.026033 0.159855 0.016270 6.280000 0.026033 0.163488 0.016454 6.419556 0.026033 0.167121 0.016636 6. 559111 0.026033 0.170754 0.021705 6.698667 0.026033 0.174387 0.025957 6.838222 0.026033 0.178020 0.028864 6.977778 0.026033 0.181653 0.031243 7.117333 0.026033 0.185286 0.033316 7.256889 0.026033 0.188919 0.035182 7.396444 0.026033 0.192552 0. 036896 7.536000 0.026033 0 .196185 0.038492 7.675556 0.026033 0.199818 0.039993 7. 815111 0.026033 0.203451 0.041415 7.954667 0.026033 0.207084 0. 042771 8.094222 0.026033 0.210717 0.044070 8.233778 0.026033 0.214350 0.045318 8.373333 0.026033 0.217983 0.046522 8.512889 0.026033 0.221617 0.047686 8.652444 0.026033 0.225250 0.048815 8.792000 0.026033 0.228883 0.049912 8.931556 0.026033 0.232516 0.050979 9. 071111 0.026033 0.236149 0.052019 9.210667 0.026033 0.239782 0.053034 9.350222 0.026033 0.243415 0.054026 9.489778 0.026033 0.247048 0. 054996 9.629333 0.026033 0.250681 0.055946 9.768889 0.026033 0.254314 0.056878 9.908444 0.026033 0.257947 0. 057792 Renton -Anacortes WQ -Existing Land Use -till 5/712013 2:55:53 PM Page 51 10.04800 0.026033 0.261580 0.058689 10.18756 0.026033 0.265213 0. 059571 10.32711 0.026033 0.268846 0.060438 10.46667 0.026033 0.272479 0.061291 10.60622 0.026033 0.276112 0.062131 10.74578 0.026033 0.279745 0.062957 10.88533 0.026033 0.283379 0.063772 11. 02489 0.026033 0.287012 0.064575 11. 16444 0.026033 0.290645 0.065368 11.30400 0.026033 0.294278 0.066149 11. 44356 0.026033 0.297911 0.066921 11.58311 0.026033 0.301544 0.067682 11. 72267 0.026033 0.305177 0.068435 11. 86222 0.026033 0.308810 0.069178 12.00178 0.026033 0.312443 0.069913 12.14133 0.026033 0.316076 0.296539 12.28089 0.026033 0.319709 1. 082413 12.42044 0.026033 0.323342 2.179588 12.56000 0.026033 0.326975 3.516027 12.69956 0.026033 0.330608 5.054641 END FTABLE 2 FTABLE 3 91 4 Depth Area Volume Outflowl Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.235537 0.000000 0.000000 0.072222 0.237969 0.017099 0.015881 0 .144444 0.240409 0.034374 0.022459 0.216667 0.242858 0.051825 0.027507 0.288889 0.245315 0.069453 0.031762 0. 361111 0.247781 0.087260 0.035511 0.433333 0.250256 0.105244 0.038900 0.505556 0.252740 0.123408 0.042017 0.577778 0.255232 0.141751 0.044918 0.650000 0.257732 0.160275 0.047643 0.722222 0.260241 0.178980 0.050220 0.794444 0.262759 0.197866 0.052671 0.866667 0.265286 0.216934 0. 055013 0.938889 0.267821 0.236185 0.057260 1. 011111 0.270364 0.255620 0.059421 1.083333 0.272917 0.275238 0.061507 1.155556 0.275478 0.295041 0.063524 1.227778 0.278047 0.315030 0.065479 1.300000 0.280625 0.335204 0.067377 1.372222 0.283212 0.355565 0.069224 1. 444444 0.285808 0.376113 0.071022 1.516667 0.288412 0.396848 0.072776 1. 588889 0.291024 0.417772 0.074488 1. 661111 0.293646 0.438886 0.076162 1.733333 0.296275 0.460188 0. 077801 1. 805556 0.298914 0.481681 0.079405 1.877778 0.301561 0.503365 0.080977 1.950000 0.304217 0.525240 0.082520 2.022222 0.306881 0.547308 0.084034 2.094444 0.309554 0.569568 0.085522 2.166667 0.312236 0.592022 0.086984 2.238889 0.314926 0. 614669 0.088421 2. 311111 0.317625 0.637511 0.089836 2.383333 0.320333 0.660549 0.091229 2.455556 0.323049 0.683782 0.092601 2.527778 0.325774 0. 707211 0.093953 2.600000 0.328507 0.730838 0.095286 2.672222 0.331249 0.754663 0.096600 2.744444 0.333999 0.778686 0.097897 2.816667 0.336759 0.802907 0.099177 2.888889 0.339527 0.827329 0.100440 2. 961111 0.342303 0.851950 0.101688 3.033333 0.345088 0.876773 0.102920 3.105556 0.347882 0.901797 0.104138 3.177778 0.350684 0.927023 0.105342 Renton -Anacortes WQ -Existing Land Use -till 5/7/2013 2:55:53 PM Page 52 3.250000 0.353495 0.952452 0.106533 3.322222 0.356315 0.978084 0.107710 3.394444 0.359143 1. 003920 0.108874 3.466667 0.361980 1.029960 0.110027 3.538889 0.364825 1.056206 0 .111167 3. 611111 0.367679 1.082657 0.112295 3.683333 0.370542 1.109315 0 .113413 3.755556 0.373413 1.136180 0.114519 3.827778 0.376293 1.163253 0 .115615 3.900000 0.379182 1.190534 0 .116701 3. 972222 0.382079 1.218024 0.117776 4.044444 0.384985 1.245724 0 .118842 4.116667 0.387899 1.273633 0 .119899 4.188889 0.390822 1.301754 0.120946 4.261111 0.393754 1.330086 0.121984 4.333333 0.396694 1.358630 0.123013 4.405556 0.399643 1.387386 0.124034 4.477778 0.402601 1.416356 0.125047 4.550000 0.405567 1. 445540 0.220016 4.622222 0.408542 1.474939 0.273959 4.694444 0. 411525 1. 504552 0.313337 4.766667 0.414517 1.534381 0.346019 4.838889 0.417518 1. 564427 0.374620 4. 911111 0.420527 1.594690 0 .400396 4.983333 0.423545 1.625170 0.424065 5.055556 0.426571 1.655869 0.446085 5.127778 0.429606 1.686786 0.466768 5.200000 0.432650 1.717923 0.486338 5.272222 0.435703 1.749280 0.504962 5.344444 0.438763 1. 780858 0.522771 5.416667 0.441833 1. 812658 0.539865 5.488889 0. 444911 1.844679 0.556328 5. 561111 0.447998 1. 876923 0.719355 5.633333 0.451094 1.909390 1.061775 5.705556 0.454198 1.942081 1.510177 5. 777778 0.457310 1. 974997. 2.042865 5.850000 0.460432 2.008138 2.647767 5.922222 0.463562 2.041504 3.316888 5.994444 0.466700 2.075097 4.044422 6.066667 0.469848 2.108917 4.825906 6.138889 0.473003 2 .142964 5.657768 6. 211111 0.476168 2.177240 6.537068 6.283333 0.479341 2.211744 7.461328 6.355556 0.482523 2.246478 8.428422 6.427778 0. 485713 2. 281442 9.436503 6.500000 0.488912 2.316637 10.48394 END FTABLE 3 END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tern strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1.167 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1.167 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tern strg strg*** RCHRES 1 HYDR RO 1 1 1 WDM 1012 FLOW ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1013 STAG ENGL REPL COPY 2 OUTPUT MEAN 1 1 48.4 WDM 702 FLOW ENGL REPL COPY 502 OUTPUT MEAN 1 1 48.4 WDM 802 FLOW ENGL REPL COPY 602 OUTPUT MEAN 1 1 48.4 WDM 902 FLOW ENGL REPL RCHRES 2 HYDR RO 1 1 1 WDM 1014 FLOW ENGL REPL RCHRES 2 HYDR STAGE 1 1 1 WDM 1015 STAG ENGL REPL RCHRES 3 HYDR RO 1 1 1 WDM 1016 FLOW ENGL REPL Renton -Anacortes WQ -Existing Land Use -till 5/7/2013 2:55:53 PM Page 53 RCHRES 3 HYDR STAGE 1 1 1 WDM 1017 STAG ENGL REPL COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL COPY 601 OUTPUT MEAN 1 1 48. 4 WDM 901 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> < -Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 2 PERLND PWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 2 MASS-LINK 3 PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 3 MASS-LINK 5 IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 5 MASS-LINK 6 RCHRES ROFLOW RCHRES INFLOW END MASS-LINK 6 MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 MASS-LINK 16 RCHRES ROFLOW COPY INPUT MEAN END MASS-LINK 16 END MASS-LINK END RUN Renton • Anacortes WO -Existing Land Use ~ till 5/7/2013 2:55:53 PM Page 54 Predeveloped HSPF Message File Renton -Anacortes WQ -Existing land Use -till 517/2013 2:55:53 PM Page 55 • • Mitigated HSPF Message File Renton -Anacortes WQ -Existing Land Use -till 517/2013 2:55:53 PM Page 56 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright© by: Clear Creek Solutions, Inc. 2005-2013; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1 (866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com Renton -Anacortes WO -Existing Land Use -till 51712013 2:55:53 PM Page 57 General Model Information Project Name: Site Name: Renton -Anacortes WQ -Build-Out -till Detention Pond Retrofit Site Address: City: NE 10th Street and Anacortes Avenue NE Renton, WA Report Date: 5/7/2013 Gage: Seatac Data Start: 1948/10/01 Data End: 2009/09/30 Timestep: 15 Minute Precip Scale: 1.17 Version: 2013/03/19 POC Thresholds Low Flow Threshold for POC1: High Flow Threshold for POC1: Low Flow Threshold for POC2: High Flow Threshold for POC2: 50 Percent of the 2 Year 50 Year 50 Percent of the 2 Year 50 Year Low Flow Threshold for POC3: 50 Percent of the 2 Year High Flow Threshold for POC3: 50 Year Low Flow Threshold for POC4: 50 Percent of the 2 Year High Flow Threshold for POC4: 50 Year ·-------·----··--·--···----------·-----------------·------------·-·- Low Flow Threshold for POC5: High Flow Threshold for POC5: Renton -Anacortes WQ -Build-Out -till 50 Percent of the 2 Year 50 Year Sn/2013 3:12:12 PM Page2 Landuse Basin Data Predeveloped Land Use Renton -Anacortes WQ -Build-Out -till 51712013 3:12:12 PM Page 3 Mitigated Land Use Duvall Bypass: No Groundwater: No Pervious Land Use Acres C, Lawn, Flat 0.205 C, Lawn, Mod 0.205 Pervious Total 0.41 Impervious Land Use Acres ROADS FLAT 0.42 ROADS MOD 0.42 Impervious Total 0.84 Basin Total 1.25 Element Flows To: Surface lnterflow Groundwater Duvall Vault Duvall Vault Renton -Anacortes WO -Build-Out -till 5/7/2013 3:12:12 PM Page4 Ridgely Bypass: No GroundWater: No Pervious Land Use Acres C, Lawn, Flat 0.653 C, Lawn, Mod 0.653 Pervious Total 1.306 Impervious Land Use Acres ROADS FLAT 1.057 ROADS MOD 1.057 Impervious Total 2.114 Basin Total 3.42 Element Flows To: Surface lnterflow Groundwater Ridgely Pond Ridgely Pond Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:12 PM Page5 Undetained Basin Bypass: Yes GroundWater: No Pervious Land Use Acres C, Lawn, Flat 3.239 C, Lawn, Mod 3.419 Pervious Total 6.658 Impervious Land Use Acres ROADS FLAT 2.237 ROADS MOD 2.357 Impervious Total 4.594 Basin Total 11.252 Element Flows To: Surface lnterflow Groundwater NE 10th Street/Anacortel! .4.0ltlNllfr~rl!mnAve NE Detention Pond Renton -Anacortes WQ -Build-Out -till 5/712013 3:12:12 PM Page6 Redeveloped Bypass: No GroundWater: No Pervious Land Use Acres C, Lawn, Flat 0.355 C, Lawn, Mod 0.375 Pervious Total 0.73 Impervious Land Use Acres ROADS FLAT 1.064 ROADS MOD 1.124 Impervious Total 2.188 Basin Total 2.918 Element Flows To: Surface lnterflow Groundwater NE 10th StreeUAnacorN!L<i.OlhfilfnlihilMtimnrl!lmuive NE Detention Pond Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:12 PM Page? Routing Elements Predeve/oped Routing Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:12 PM Page 8 Mitigated Routing Ridgely Pond Bottom Length: Bottom Width: Depth: Volume at riser head: Side slope 1: Side slope 2: Side slope 3: Side slope 4: Discharge Structure Riser Height: Riser Diameter: Orifice 1 Diameter: Orifice 2 Diameter: Element Flows To: 120.12 ft. 20.02 ft. 6 ft. 0.4522 acre-ft. 2 To 1 2 To 1 2 To 1 2 To 1 5 ft. 12 in. 1.72 in. 1.56 in. Elevation:O ft. Elevation:3.35 ft. Outlet 1 Outlet 2 NE 10th Street/Anacortes Ave NE Detention Pond Pond Hydraulic Table Stage(ft) Area(ac) Volume(ac-ft) Discharge(cfs) lnfilt(cfs) 0.0000 0.055 0.000 0.000 0.000 0.0667 0.056 0.003 0.020 0.000 0.1333 0.056 0.007 0.028 0.000 0.2000 0.057 0.011 0.034 0.000 0.2667 0.058 0.015 0.040 0.000 0.3333 0.059 0.019 0.044 0.000 0.4000 0.060 0.023 0.049 0.000 0.4667 0.061 0.027 0.053 0.000 0.5333 0.062 0.031 0.056 0.000 0.6000 0.063 0.035 0.060 0.000 0.6667 0.063 0.039 0.063 0.000 0.7333 0.064 0.044 0.066 0.000 0.8000 0.065 0.048 0.069 0.000 0.8667 0.066 0.052 0.072 0.000 0.9333 0.067 0.057 0.075 0.000 1.0000 0.068 0.061 0.077 0.000 1.0667 0.069 0.066 0.080 0.000 1.1333 0.070 0.071 0.082 0.000 1.2000 0.071 0.075 0.085 0.000 1.2667 0.072 0.080 0.087 0.000 1.3333 0.073 0.085 0.089 0.000 1.4000 0.073 0.090 0.091 0.000 1.4667 0.074 0.095 0.094 0.000 1.5333 0.075 0.100 0.096 0.000 1.6000 0.076 0.105 0.098 0.000 1.6667 0.077 0.110 0.100 0.000 1.7333 0.078 0.115 0.102 0.000 1.8000 0.079 0.120 0.104 0.000 1.8667 0.080 0.126 0.106 0.000 1.9333 0.081 0.131 0.108 0.000 2.0000 0.082 0.137 0.109 0.000 2.0667 0.083 0.142 0.111 0.000 2.1333 0.084 0.148 0.113 0.000 2.2000 0.085 0.153 0.115 0.000 Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:12 PM Page9 2.2667 0.086 0.159 0.117 0.000 2.3333 0.087 0.165 0.118 0.000 2.4000 0.088 0.171 0.120 0.000 2.4667 0.089 0.177 0.122 0.000 2.5333 0.090 0.183 0.123 0.000 2.6000 0.091 0.189 0.125 0.000 2.6667 0.092 0.195 0.126 0.000 2.7333 0.093 0.201 0.128 0.000 2.8000 0.094 0.207 0.130 0.000 2.8667 0.095 0.214 0.131 0.000 2.9333 0.096 0.220 0.133 0.000 3.0000 0.097 0.226 0.134 0.000 3.0667 0.098 0.233 0.136 0.000 3.1333 0.099 0.239 0.137 0.000 3.2000 0.100 0.246 0.139 0.000 3.2667 0.101 0.253 0.140 0.000 3.3333 0.102 0.260 0.141 0.000 3.4000 0.103 0.266 0.157 0.000 3.4667 0.104 0.273 0.166 0.000 3.5333 0.105 0.280 0.173 0.000 3.6000 0.106 0.287 0.179 0.000 3.6667 0.107 0.295 0.184 0.000 3.7333 0.108 0.302 0.189 0.000 3.8000 0.109 0.309 0.194 0.000 3.8667 0.110 0.316 0.198 0.000 3.9333 0.111 0.324 0.202 0.000 4.0000 0.112 0.331 0.206 0.000 4.0667 0.113 0.339 0.210 0.000 4.1333 0.114 0.346 0.214 0.000 4.2000 0.115 0.354 0.218 0.000 4.2667 0.116 0.362 0.221 0.000 4.3333 0.117 0.370 0.225 0.000 4.4000 0.118 0.377 0.228 0.000 4.4667 0.120 0.385 0.231 0.000 4.5333 0.121 0.393 0.235 0.000 4.6000 0.122 0.402 0.238 0.000 4.6667 0.123 0.410 0.241 0.000 4.7333 0.124 0.418 0.244 0.000 4.8000 0.125 0.426 0.247 0.000 4.8667 0.126 0.435 0.250 0.000 4.9333 0.127 0.443 0.253 0.000 5.0000 0.128 0.452 0.255 0.000 5.0667 0.129 0.460 0.426 0.000 5.1333 0.130 0.469 0.735 0.000 5.2000 0.132 0.478 1.135 0.000 5.2667 0.133 0.487 1.607 0.000 5.3333 0.134 0.496 2.143 0.000 5.4000 0.135 0.505 2.735 0.000 5.4667 0.136 0.514 3.379 0.000 5.5333 0.137 0.523 4.070 0.000 5.6000 0.138 0.532 4.806 0.000 5.6667 0.139 0.541 5.583 0.000 5.7333 0.141 0.551 6.400 0.000 5.8000 0.142 0.560 7.255 0.000 5.8667 0.143 0.570 8.147 0.000 5.9333 0.144 0.579 9.073 0.000 6.0000 0.145 0.589 10.03 0.000 6.0667 0.146 0.599 11.02 0.000 Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:12 PM Page 10 Renton -Anacortes WO -Build-Out -till 517/2013 3:12:12 PM Page 11 Duvall Vault Width: Length: Depth: Discharge Structure Riser Height: Riser Diameter: Orifice 1 Diameter: Orifice 2 Diameter: Element Flows To: 18 ft. 63 ft. 12.56 ft. 12.06 ft. 12 in. 0.5 in. Elevation:O ft. 0.875 in. Elevation:6.5 ft. Outlet 1 Outlet 2 NE 10th StreeUAnacortes Ave NE Detention Pond Vault Hydraulic Table Stage(ft) 0.0000 0.1396 0.2791 0.4187 0.5582 0.6978 0.8373 0.9769 1.1164 1.2560 1.3956 1.5351 1.6747 1.8142 1.9538 2.0933 2.2329 2.3724 2.5120 2.6516 2.7911 2.9307 3.0702 3.2098 3.3493 3.4889 3.6284 3.7680 3.9076 4.0471 4.1867 4.3262 4.4658 4.6053 4.7449 4.8844 5.0240 5.1636 5.3031 5.4427 5.5822 Area(ac) 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 Renton -Anacortes WQ -Build-Out -till Volume(ac-ft) 0.000 0.003 0.007 0.010 0.014 0.018 0.021 0.025 0.029 0.032 0.036 0.040 0.043 0.047 0.050 0.054 0.058 0.061 0.065 0.069 0.072 0.076 0.079 0.083 0.087 0.090 0.094 0.098 0.101 0.105 0.109 0.112 0.116 0.119 0.123 0.127 0.130 0.134 0.138 0.141 0.145 Discharge(cfs) lnfilt(cfs) 0.000 0.000 0.002 0.000 0.003 0.000 0.004 0.000 0.004 0.000 0.005 0.000 0.006 0.000 0.006 0.000 0.006 0.000 0.007 0.000 0.007 0.000 0.008 0.000 0.008 0.000 0.008 0.000 0.009 0.000 0.009 0.000 0.009 0.000 0.010 0.000 0.010 0.000 0.010 0.000 0.011 0.000 0.011 0.000 0.011 0.000 0.011 0.000 0.012 0.000 0.012 0.000 0.012 0.000 0.012 0.000 0.013 0.000 0.013 0.000 0.013 0.000 0.013 0.000 0.013 0.000 0.014 0.000 0.014 0.000 0.014 0.000 0.014 0.000 0.014 0.000 0.015 0.000 0.015 0.000 0.015 0.000 5/7/2013 3:12:12 PM Page 12 5.7218 0.026 0.149 0.015 0.000 5.8613 0.026 0.152 0.015 0.000 6.0009 0.026 0.156 0.016 0.000 6.1404 0.026 0.159 0.016 0.000 6.2800 0.026 0.163 0.016 0.000 6.4196 0.026 0.167 0.016 0.000 6.5591 0.026 0.170 0.021 0.000 6.6987 0.026 0.174 0.026 0.000 6.8382 0.026 0.178 0.028 0.000 6.9778 0.026 0.181 0.031 0.000 7.1173 0.026 0.185 0.033 0.000 7.2569 0.026 0.188 0.035 0.000 7.3964 0.026 0.192 0.036 0.000 7.5360 0.026 0.196 0.038 0.000 7.6756 0.026 0.199 0.040 0.000 7.8151 0.026 0.203 0.041 0.000 7.9547 0.026 0.207 0.042 0.000 8.0942 0.026 0.210 0.044 0.000 8.2338 0.026 0.214 0.045 0.000 8.3733 0.026 0.218 0.046 0.000 8.5129 0.026 0.221 0.047 0.000 8.6524 0.026 0.225 0.048 0.000 8.7920 0.026 0.228 0.049 0.000 8.9316 0.026 0.232 0.051 0.000 9.0711 0.026 0.236 0.052 0.000 9.2107 0.026 0.239 0.053 0.000 9.3502 0.026 0.243 0.054 0.000 9.4898 0.026 0.247 0.055 0.000 9.6293 0.026 0.250 0.055 0.000 9.7689 0.026 0.254 0.056 0.000 9.9084 0.026 0.257 0.057 0.000 10.048 0.026 0.261 0.058 0.000 10.188 0.026 0.265 0.059 0.000 10.327 0.026 0.268 0.060 0.000 10.467 0.026 0.272 0.061 0.000 10.606 0.026 0.276 0.062 0.000 10.746 0.026 0.279 0.063 0.000 10.885 0.026 0.283 0.063 0.000 11.025 0.026 0.287 0.064 0.000 11.164 0.026 0.290 0.065 0.000 11.304 0.026 0.294 0.066 0.000 11.444 0.026 0.297 0.066 0.000 11.583 0.026 0.301 0.067 0.000 11.723 0.026 0.305 0.068 0.000 11.862 0.026 0.308 0.069 0.000 12.002 0.026 0.312 0.069 0.000 12.141 0.026 . 0.316 0.296 0.000 12.281 0.026 0.319 1.082 0.000 12.420 0.026 0.323 2.179 0.000 12.560 0.026 0.327 3.516 0.000 12.700 0.026 0.330 5.054 0.000 12.839 0.000 0.000 6.771 0.000 Renton -Anacortes WQ -Build-Out -till 5/7/2013 3:12:12 PM Page 13 NE 10th Street/Anacortes Ave NE Detention Pond Bottom Length: 190.00 ft. Bottom Width: 54.00 ft. Depth: 6.5 ft. Volume at riser head: 1.8769 acre-ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Discharge Structure Riser Height: Riser Diameter: Orifice 1 Diameter: Orifice 2 Diameter: Element Flows To: Outlet 1 5.5 ft. 12 in. 1.5 in. 4 in. Outlet 2 Pond Hydraulic Table Elevation:O ft. Elevation:4.5 ft. Stage(ft) Area(ac) Volume(ac-ft) Discharge(cfs) lnfilt(cfs) 406.00 0.235 0.000 0.000 0.000 406.07 0.238 0.017 0.015 0.000 406.14 0.240 0.034 0.022 0.000 406.22 0.242 0.051 0.027 0.000 406.29 0.245 0.069 0.031 0.000 406.36 0.247 0.087 0.035 0.000 406.43 0.250 0.105 0.038 0.000 406.51 0.252 0.123 0.042 0.000 406.58 0.255 0.141 0.044 0.000 406.65 0.257 0.160 0.047 0.000 406.72 0.260 0.179 0.050 0.000 406.79 0.262 0.197 0.052 0.000 406.87 0.265 0.216 0.055 0.000 406.94 0.267 0.236 0.057 0.000 407.01 0.270 0.255 0.059 0.000 407.08 0.272 0.275 0.061 0.000 407.16 0.275 0.295 0.063 0.000 407.23 0.278 0.315 0.065 0.000 407.30 0.280 0.335 0.067 0.000 407.37 0.283 0.355 0.069 0.000 407.44 0.285 0.376 0.071 0.000 407.52 0.288 0.396 0.072 0.000 407.59 0.291 0.417 0.074 0.000 407.66 0.293 0.438 0.076 0.000 407.73 0.296 0.460 0.077 0.000 407.81 0.298 0.481 0.079 0.000 407.88 0.301 0.503 0.081 0.000 407.95 0.304 0.525 0.082 0.000 408.02 0.306 0.547 0.084 0.000 408.09 0.309 0.569 0.085 0.000 408.17 0.312 0.592 0.087 0.000 408.24 0.314 0.614 0.088 0.000 408.31 0.317 0.637 0.089 0.000 408.38 0.320 0.660 0.091 0.000 408.46 0.323 0.683 0.092 0.000 408.53 0.325 0.707 0.094 0.000 Renton -Anacortes WQ -Build-Out -till 517/2013 3:12:12 PM Page 14 I '· RECEIPT EG00008436 . BILLING CONTACT Allen Quynn City of Renton 1055 S Grady Way Renton, WA 98057 REFERENCE NUMBER FEE NAME -. LUA 13-000605 PLAN -Environmental Review Technology Fee Printed On: 5/13/2013 Prepared By: Rocale Timmons . ~=""-""" TRANSACTION TYPE -··'·'·"··"""""' - Fee Payment Fee Payment ! ! Transaction Date: May 13, 2013 f.1'/.)1 l ' ;' ···: . . " 1, . \ PAYMENT METHOD ="""•-'~~'"'-""'m ~teroffice Account rans fer ~teroffice Account ransfer SUBTOTAL TOTAL AMOUNT PAID -~-'"'" c,,.~•••••=••w<««-•= $1,000.00 $30.00 $1,030.00 $1,030.00 1 of 1 DATE: TO: FROM: SUBJECT: D epartment Ch arge d Account Number 427.475493.018.594.3 l.63.000 FINANCE AND INFORMATION SERVICES DEPARTMENT MEMORANDUM May 10, 2013 Casaundra Commodore, Finance & Information Services Department Allen Quynn Re: INTERFUND TRANSFER REQUEST Instructions: Please note that failure to provide all digits will result in processing delays. All Signatures and correct documentation must be included. Please prepare the following inter-fund transfer: Project, function, task, sub-task Description Amount U69493,~,oooo,oooo SEPA Environmental $1,030.00 tot./0 Review Fee ' Total $1.030.00 *Char11ed Denartment Authorh_,.;_;on* I APPROVAL SIGNATU~~ di.9 ,/_ : .. : 1 Printed Name fo fl"-l J ~ S ..1 · I--Date £J1.L Is CREDIT· Account Number Project, function, task, sub-task Description Amount 000 .000000 .007 .345 .81.00 .007 U69493, !035, 0000, 0000 SEPA Environmental $1,000.00 Review Fee 503.000000.004.322.10.00.01 l U69493, !035, 0000, 0000 3% Technology Fee $30.00 Total $1,030.00 Reason: SEPA Environmental Review Fee+ 3% Technology Fee Note: Documentation to support this transfer request must be attached and all signatures are required. H:\File Sys\SWP -Surface Water Projects\SWP-27 -Surface Water Projects (CIP)\27-3645 NE 10th-Anacortes RD Pond Retrofit\Perrnits\InterfundTransfer.doc Revised 01/09 ~ .., ~ c§ ... Ii ,.. "' § i ~ ~ .,, i:: I ;,< >< >< >< I >< X X ~ ., -.. ,, •:.: ·-.., -<> ,, ~ ,.. "' a, ,, ·-" Ji1 C, -' '-' ' -~ -' '" 1i" ~ C, ~ t,l ~ .l: :_;; ,S ! 5 '" c, ·-.. !Jl C, ' -•· ' ~ . .. (•i -,r,:i ·-"' ' J N •- :s; '1 '" ·-i5 « ~ !;[ u ' " -0 >< g: ~ D l : ! I ' ' i I ' __ J --· . - ' l ' I ; ' I -• I I I I I NORTl-f 20 I 1 ! l; i::m Scshl In Foot ,,, (,"") (/> ·s {.) -... 0 $ ..... t'"'C) ---B. I r r---I I I -·-~ 1 ' I ' BHC Consultants, LLC 720 Third Avonuo, Sui!o 1200 SeaUle, Washington 981()4.1820 206.505.3400 206.505.3406 (fa,) WiVW. bhccorn;.uJtant<J."com RECOMMENDED FOR Al'f'ROVAL BY BY -Pl.3 1---1--------------------+---+---t---1 -Jk NO. Rr.VISION BY DATE APPR r:""""""'::c:c=-~-----1 DC -H: 1"•20' V: 1"-5' I DATUM ~Mb I I I I I l " n I I ' ' 11 - EXCAVATION ANO AREA OF WORK AREA OF PROPERTY: 49,194 SF 28,000SF 1,480CY 2,74-0TONS AREA OF WORK: EXCAVATION: FILL: NOTE: 450 CY BAllAST 820 TONS BALLAST CONTOUR INTERVALS ARE 1 FOOT. ·--~ ----- CITY OF RENTON :c;ity of fit?r1tori Pl;u,niMtJ llivlslon MAY l l 1013 iFrl~t~ll\lff[Q) CALL 3 WORKING DAYS BEFORE YOU DIG 1-800-424-5555 NE CITY OF RENTON 10th ST /ANACORTES AVE NE DETANTION POND RETROFIT .... 07-2.5-08 Planning/Building/Public Wooo Dept. POND LAYOUT -- '· ·-.. --.-------------------------·-----~-----------------------~~---~--------------------------------"------------------------------·····------, >< >< >< >< I X X X X X -, -Q u '• "' -- 420 415 410 420 -···································································································· 420 • • • • • . • TOP OF DETENTION TOP·OFWATER 415 • • QUANTITY . . · • TREATMENTVOl:.UME · · · · · · · · · · · · · · · · · · · · · ' · • · • · • • 415 . ' . . EL406 • _ , VOLUME, · · · · · · · · · · · · · · · · · · · · · · · · · ·EL·411.5·-----\· · · · · · · · · · · · --. \ . \ • ' \ 'v ~-----' - • • • ___ ....,_ ____ -+-----------~ 410 -. ' ... . - : • • • • • • • • ' • • • + • • • • + • ' + + • + • • • •\ 0 p • I • • • ' • : • • • • • • • • • • • • • • • • ' • • • ' • • • • • ..................... ,, .......... 410 • . \ . . ' . • ' • • • • 405 ··································· .......................................... 405 • • • • 3:1 SLOPE, TYP--~ • • • • • • 400 ········································· 395 • • • • • • • • • • • • . ...................................................................................................... • • ' • • • • • • ····················································-················································ SECTION C-1 395 .......................................................................................................................... • . . • - TOP OF DETENTION - : "---... : VOLUME, : '. : TOP OF WATER : · · · -~· · · · · · · · · · · -· · · · · · EL'411.5 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·a·u·ANTI· · ·rr· · · · · · · · · · · ·: · · • · · · · · · · · · · · · · • · • . .........., . . . . ---.,,.__""' TREATMENT VOLUME, ~ . a4oo '\, . ---"" ._.__ ............ ... ... _ ....... _ . ----.---~ ____ ......,, : • • • • + • • + • 0 • • + • • • ~\u,w •-~~~ • • • • • • • ,-, • • • ~~~ • : 0 + .-, ,-, + • • • • • ' • • ' • • f : + • + ' + • • • • • 1 • • • •: • • • • • • • • • • • • • • • • • • • • • • ' • • • • • • • 0 • • • • • • • • . . . . • : ·, : -1: . / • ....... + ' . . . . . 77777?""'"'""""'""''77?777'777'.:>7:7:'77''77?777777777::>7:7:777,'777777..~7-'--"" 405 ........ ,, ............. . 400 395 . 3:1 SLOPE, TYP--,-_J ······························· • • CELL2, 22,100CF • • • • • • • • -·-········································ 2'SEDIMENT STORAGE • • • • • ' . . . ' . . . . . . . . . . . . . . . -. . . . . . . . . . ' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ···············-································ • • • :BERM CELL 1, · ' • • • 16,800 CF • • • • .......................................................................................................................... BHC Consultants, LLC 720 Third Avenuo. Suito 1200 Sonnie, Wa~hington 9B1C)4..1SZO 206.SOS,3-100 SECTION SCALE: 1" "20' H 1" c.5'V RECOMMENDED FOR APPROV.AL BY _______ _ C-1 1---1-----------------r---1-----t---, -JI( 420 415 410 405 400 395 200.S05,3400 (fnx) www.bheeonsunnnts.com BY _______ _ NO. REIIISION BY ,-.------, DAlE /IPPR -00 ''"" DATUM CITY OF RENTON Planning/Building/Publlc Worl<s Dept. CALL 3 WORKING DAYS BEFORE YOU DIG 1-800~424-5555 CITY OF RENTON NE 10th ST/ANACORTES AVE NE DETENTION POND RETROFIT SECTIONS C-2 -"" -- V '~ -.-. . ,lty Of A I '!,in,,·. erito,-, lr,g/)·. ,, . l\11 . -s1on ; . '