Loading...
HomeMy WebLinkAboutCorrespondence APPLICANT 6/9/2006 -:- ~ (~..; " / Robertson ISherw~od I Architects PC Transmittal To: City of Sprinqlield 225 5th Street. Sprinqlield, OR 97477 Attn: Andy Limbird, Planner II Transmitted: ~ Herewith 0 Under, Separate Cover 0 By Carrier Copies 18 Amended Site Application Stormwater Management System Scope 01 Work lorm 4 o o [8J Disposition: App~oval and/or Signature Reply For Your Information Item I Description 4 StormwaterTreatment Calculations 8.5" x 11 "versional Site Plan Note: cc: Date. Received:~bo6 Planner: AL 1, 132 East Broadway, Suite 540 Eugen.B, Oregon 97401 . P 5411342.8077 F 5411345.4302 www.robertsonsherwoo~.com Date: 9June 2006 Project: Sprinqfield Justice Center From:' Randy Nishimura, AlA FAX Transmission: 0 FAX Number: Number of Pages lnclu~,ing Cover: Pro]. No.: 0542 Dated 9-Jun-2006 9-Jun-2006 9-Jun-2006 9-Jun-2006 :Rh,L;t:!.IVED JUN 0 9 2006 . BY: 06/?9/2006 08:19 FAX 541 736 1021 -,' ., 0~J/oif2006 12: 01 FAX 541684 "'9 CITY OF SPRINGFIELD PW KPFF i41002 Ij!i 002fOOZ " _wi. PUBLIC WORKS DEP ARTMENTiI Engineering Division Fax; '(54 J) 736-102 J STORMW ATER MANAGEMENT SYSTEM SCOPE OF WORK . ......\.....:, . '-:..'...\..\,i:.\...... 'iArd..h~kMltf,isii;ie'frrI~;i~iJi byAppii;;an~ .:..:.:.:..;., ,'.. ." ...:,'. '.".'::';'.',;.' ""1 ..il'ie~~t.#'.'~i.t~M~~toUd~@Ci7fj#P.rinJ:i;~14 p.Ubi~c.'ko'k; {Inginem).i; F;U #736.-10~i. Ph~,j~ #. i~6~io3S,) '..: ..' '. ProjectName: SP\Z..II0(~F1'iAA) \oC~Tlc.t.- C~pplicant: KPl".l" / (.i-hj vf C;o.in4ir lei I' AssessorsParcel#: l'l-D3-8<;;-2,<f Date: ",-9,-01" J LandUse(s): ('()r>1.w.4.d-L/~'- Phone#: s4/-6'l,1f- 'f1{)2- I Project Size (Acres): ! _ ?-f) Fax #:. 9f I - ./r, 'JJ '1- . If"!/) "1 I ~~~~~~=?o~~~~~~~;~,~'M_ill<.'1':1;';~~~;.:<r,"';\5'.".::~~:,:;:;,~:!~t:l~!l~;;:J~,J:""~~''';:;!\lf;_~''OO'S;;tl!;il!;f.~~:.~I~~:~~J;:~.:ii~~~!/'~il!i~~.:~! Proj~t D~~rjption (lncludea copy' of Assessor's map): ?Ol--!~1:jc-Ouf..P;,BvnO'lfJ)c.'7, JklL./ A1VO/'rS.:;.ouA-iUJ UT/'!-J n,<-s ':' , ,,"j , ; : '\. '< I . ":', .... '. . .' ,. ....' ',' '" . oj, .: Qr!m.~g~..rnip,9~MQ':AAlic c.(lIUle~ti(ln(s)..,discha<geJocation(8). .etc. . A~chadditional~heei(s) ,if n~ssary:: . . . . . '~~~11~~~'~7:7~~0;%Z:~~~~yyft~~~ ............... ~~~.~~'~~~m~~'~i~!',;"f\>,j,~i~:..\...,.. .'. '. ,.';"C,,\:'i;'(".;i",'\it;;~~w~wj~~~tiii~i~~~ii~~iiIflt;i;l~g;Yt~~fjj.llis~*~~\;~:ii ....F;>'::::, . " ,'. . . ".-' " "',.'- .:. :..", ,"" '. ',',', " ". . ': "', ,."."... "1'",:-.; , . :...: -.' , '. ','.';. '."".:.. "., . .... ',"': : :.. , .: .;..' ;',: ,', : ..: :' "', . "., . .; : ~ . . \ '. '. ' . . ;., . , .',.:' . . ',' Draina~e Stud" Tvp'e lEDSPM Section 4.03.2): . ~ot~; 'UH mav be sllb~titutedfor :Rational Method\' : '.':. 'ijj \;UlalISiteStUd:Y.::"(uS~RB.ti~~;,)i;:i~ib.;df~~~I~latio~~)\\' '. . . ..... ....c... .'.:\<' ,0 ,Mid-4"eiDe~d~pIll~tS~dY~'(~etr;,itH~~p~M:~idfu~~;ati~)': .... .' . D:F~1 Dra4lag~De"eloP01entS~y ,:.: (",;., Uni! HY<k,,&raph~~\hodfor c~,lculationS) .. . . ,",: ",' ..".' '..... "', "" Environmental'Considerations: .' ' ' 'f?jj :w ellheai:l Zone; . ~C ' '. .~ Wetl~<0tiparian: /J/f"i. fil Soil1)pe:' '=14:':'M.,./g,LM ',,',. '.,." ".1It Hillside Development: . S FloodwaylFloodplain: fi Other Jurisdictions: . . ' .... . , tJk .:>A\ '..' UfblJl, (,..'If> Downstrea'rn Analysis::I~V U NiA'.. '. . o Flowline for ~taiti11g water surface ,elevation: o Pesign HGL to us~for.~tarting water surfac.e elevation; [:J Macll<~le/Jutiction to ~e analySis to: ". .', . : . '.. . ,I " . Olil ~T"'" I .L.' Return to Matt Stouder@! City ofSprinJ:field, ewan: wstoudet(U)ci.sptin~eld.or.u., FAX: (541) 736-1021 Date Received: 6/F06 Planner: AL / 0.6/09/20.0608:19 FAX 541736 1021" 'P-, . -. ~, CITY DF SPRINGFIELD PW i41003 COMPLETE STlJDY ITEMS I For Official u",Only /fJIIS .. * Based upon the tnfo~ation provided on the from of this sheet. the folluwing represerrts a minimum if what is neededfor an application to be comple/efor submittal with resped to drainage; huwel'er. this liSt should not be used tilli"" of the Springfield Development Code. (SDC) or the City's Engineip'ing f)e.sign Manual. Compliance with these requirements does not constitute site appraval; Additional tite specific tnformation may be required. Note: Upon scoping sheet submittal. ensure completedform 11m been signed in the space provided beIuw: ;, lnterill1 Design SlaDdardsfWater Quality (EDSPM Cbapter 3) ~~~ ' ' , " ' it 0 All non-buiJding rooftop (N'BR) impervious swfu,ces shall be pre-treated (e.g. multi-chambered catchbasin w/oil filtration media) fOI stormwatel' quality. Additio"ally, a minimum of50% of the NBR impervious suiface shall be tn:ated by veget8led mcthods. fiI 0 When! required. vegetative sL.~..,;';"'1 design shall be consistent with interim design standards' (EDSPM Section 3.02). set forth by the Bureau ofEmironmentalServices (BES) or Clean Water Services (CWS). . 0 For new NBR impervious area lessithan 15,000 square feet, a simplified dcign approach may be followed as specified by 1he BES for vegetative treatment., ' IJ 0 If a S1:ormwnter treatment swale is Propesal, submit calcula:tionslspecifiea1:ions for sizipg, velocity, flow, side slopes. bottom slope, and seed mix consistent with either BES or CWS requiremeuts. I 0 Ware< Quality caIcuIations as ~ in Section 3.03 ,I oftheEDSPM o All building rooftop mounted equipment, or other fluid containing equipment located o1ltSide of the building, sball be provided with secondazy cbntaiIonent 01 weather resistent encloouie. General Study ReqWreu>ents (EDSPM Section 4.03) II 0 Drainage study I'.~t'~ _J by ;, Professional Civil Engineer liCensed in the state of Oregon. IW 0 A complete drainage study, as req1rlred in EDSPM Secti,on 4.03.1, including a hYdrological study map. ~ 0 Calculations shOwing sysrem capacity for a 2-yea:r storm event and overflow effects of a 25-year stann event. ~ 0 The time of concentration (Tc) shiiu. be detenniDed using a 10 minute start time for developed basins. Review of Downstream System (EDSPM Seetion 4.03.4.C) , o filA downstream drainage ana.ly>;is ~ desctibed in EDSPM Section 4.03,4,C. On-site drainage shall be gOverned by the Oregon Plumbing Specialty Code (OPSC). o ~Elevations ofm;, HGL and flow fu,es for both city and privaJ:e sysleIUS where applicable. , Design of Storm Systems (EDSPM SectionI4.04) , ' ' .fII, 0 Ftow lines, slopes, rim elevations;' pipe type and sizes clearly indicated on the plan set. . I'J 0 Minim= pipe cover shall be 18 inches for reinfurced pipe an.d 36, inches for plain concrete and plastic pipe materials, or proper engineering calculations shall be plovided when less. The cover shall be sufficient to sUpport an 80,000 lb load without failure of the pipe structufe. ~ 0 Manniug's "n" values fo<pipes st1au be consistcntwith Table 4-1 of the EDSP. 'All slonn pipes shall be designed to achieve a rrricim= velocity ~fthree (3) f,et per second at 0..5 pipe'full based on Table 4-1 as well. OthetiMis<: I 0 E>iisting and proposed con1oun, iocated at one foot iIhervaL Include spot elevations and sire grades showing how sile drains 0' Private sl=wateI' easements s~ be clearly depicted on plans when private starmW1lter flows from one property to another o 8Drywells shall not rec!,ive nmofffrom any suifac:e w/o being treated by ,one 01 more BMPs, with the exception of residential building roofS (EDSP Section 3.03.4.A). Additional provisions apply to this as required by the DEQ. Refer to the website: www.dM<tate.or.us/wo/oround~aluichome..lcm for more information. ' o ~DelEl1tion ponds sbiUl be designed to limit";;to pre-development rates for the 2 througb25-yea:r storm events , ' ~This form shall be uJp.ded as an att4cllnrent, inside the fron!. cover, of the stormwfl1er srut!y I * IMPORTANT: ENGINEER PLEASE llEAJJ BELOW AND SIGN! I Date -6/7~~ As the engine<t o!reCord, I hereby certifY:tbe above requir'ed items are , ..../- ~ ~ complete and included with the subotim.fstorrnwater study and plan set Signature ..1' Y' , ',- Form Vedon 2: March 20.04 Date Received: 6/?/;!P06 Planner: AL /I "'tlO ii)ll>' :)n\ ffi:;a :"'lID 0, )> m. r-< ~ ,~~ " ::t;-.! ,~! ~-! <:S;! ",I I , ~ ...""...."".R."'P ~O.._.,..': ,l~' ',I, Fropo.ed l- $,,",1,.. ' - I i... f1Q ,.'bilc~ 'equlte<l por . SptlngrIoIOO....Iaj>me<>'Code. S.....h..tGl,C"""'s.....~. ~ 6'COrtCtele ~,".I< - ACU551bIeRaO\p wIDe'Ild.obl8P.'l->Ii -, ,--------,-------------------------,-------' } , .. ~- , &I'.>)! m ..., B STREET L"''''.~-~ nu::rffC ~ ~II} P"CIPERTYLHE Imm OEC"".TJliEP,VNI I:II!I CO>lCRETEPOlilNO eB VEl<lCl..E,o.oDEOCO'tCRElE .. DEl<:crA9t-EP,Wii;,;;.' ... /lcceIOII;OoRamp r- ",!o.t."""'''!'.'~ r....- -m<oPorll>g \'C.<oo.'CO",~~""" ."...",,",,-... ' -P,opo.>....II._l'YP -Prop""edT..." Receptoclojly;>.i ~ ~ ~ ~ ~ ~ W W Z o " -B".P~ .',......'''''''-, POLICE/COURTS BUILOING See Archllectural Plans .' lI:>KTEOOOcLJ.Rfl ICa oFT.OE>lCH . T"'SHRECEP'f>'c'E O. EXlSTViGllGHTPOl~TORl'''''''' E>:lSTNGPOWEl<f'OUTOR\::....1N I: _f10R,b&okro"'*"dper SprIrlQIIooI'O"'olopmoolCOd', S..'~lG\,CO..'S,*,I. g ~ . ,- . - j secur'j Fonco & Pcraon Gatll , - (i;: · ;-'~" (~ III '''' ,n~ ~' f,! ~, :~,;,-?roI"".~Ll9hl9d ''&''-:~''::1' 6ola'dltyo,l -.:{: .. 'r - Propc>5<>llAcaln' _ Tr.. . E'''''''-Pov<'''~;;" i"aIe"'I'!......~. H..L ~ ~ 'r1H ~I~~ ~'I",Ir'l\lT,,,,,-(ii~ ",Remsln t _ , (l~ l~~-c . 5'Con<;t&IoWdI JAIL See Architectural Plans to w ~ ~ 00 r ~ . . PLJ8LICENTRY SAlLYPO"lT . Acc...IbioRamp wlDelootab"Pa,..k>\I No,.'''''oi<,equlreOp.' Spm~IIeIdO.ov.Iop<n~God., S....he.'G1,Co'e'She.L A STREET lTOSprjr>gf\elllStatlonl twO ~Iock. .0"", "':j55' S....lhA SU..L '1 ( SITE PLAN ~~ "' .".lDt.... E>mu'iC~ ~ ~ Ijll%i1fl P1.Jo,'fTllEo.l.l,()"~$W""E""'EAS I , !..-_.. o o o HISTlNG TREE TO '<E"'"l'l __..c..S.................'" EoSUog~_ PROPOSED STREET TREE _,",,-,C3C"--'..~ PROPOSED ACCEm TRfE SoeS_"'L....OO..I'lo.. r--- . . I , . I . NOTES ,. ...,OOO'___"'..,_.....""'~..."'..,.,. '''''00, """""w.."O>g.-"O>g.,otc._<<>rl"",,,,..OnogM S............"',"'por.Ioo_."'...""............. 2,S..."'.........f>Iono''''b"__,oIoo.ond'''_ Iloo<"'... J,tlo''''kIo___0,_,,",_Cooo.' S....,...0,;':O'...5I>..., -.- .....r .,tlo~.........,oq"...l>IS_Oo,,*"''"''"'Cooo _,,_o,..:o....~ ~, _.rct-_.....IO(_r~IgO'"'" '.lM>oT'onaIOIIW'.S_S....",..llM>o""'''''''*''''.. """""3>5_" A $0"_ . !..-_. "",,--" BICYCLE PARKING REOiUU'EO sPcce PARKIN" 11>0.........""""5_1:1 o..."""",,"C<IcIej POCIOE.oCOURTSIlU.LDNG: ~l,lIOOllI' 1'<l'oce'3000goI) ,,- r 'A".. 100_. 1'.~'20_)' ,- TOUL: "-- ,s.."""".....,._ ~S%IonQ-<e/m__.. . I........ .- 0' lO' 111' .w NORTH "M".Nq rLJI n \\J , 't! u 0: 2 ~' :c z u '" ,:. '!, u 1I ~LiJ -g !~ u o ;:: :r: ! ~ U'I ~, :> 1: .., .!!!.. 9 II: ~ Lo.I o l6 ~ ~ :~ (,) :;; I,! Z D 0: 8. H 3; - I~ 16 ill z '\ d W ~ ~ . ! ! j '- ~" ! L2 , - .. f. ..::{C', , " . '.f"::,- . I k ff , , KPFF Consulting Engineers siormw~ter Treatment Calculations for , The Springfield Justice Center Springfield, Oregon Prepared For: Robertson Sherwood Architects Ii 132 East Broadway, Suit~ 540 Eugene, Oregon 97401 t,':l. j~~~ ',r.' , ',' . . ~:. '<- ~: '. .'-, Prepared By: KPFF Consulting Engineers 132 East Broadway, Suite 538 Eugene, Oregon 97401 ., '/ KPFF Project No, 305815 June 9, 2006 , Date ~eceived: t/f.~tJ(; Planner: AL 7 1 v .. '. Bureau of Environmental Services - SBUH Calculation Worksheet " Project Name: Springfield Justice Center Designer: SBF Date; 6-8-06 User-Supplied Oat> .mPerviOUS!Area%L1r3el~~Ei:S;Xi~';';I:5!1r~i;_!,_;;3EiMtB1Ef2gYC?Gfifi'!:lmpervlous.AreaG2tJdg~L~~M[K6l%~.,J~.-~_~dt'f;k.~':Lt~'1 Pervious Area, SF I 140~ Impervious Area, SF I 4,331 I Pervious Area, Acres I 0.03 Impervious Area, Acres I 0.10 Pervious Area Curve Number, CNperv I 80 Impervious Area CurVe Number, CNimp I 981 Precipitation in 24 hours (PI) = , I 0.831 . I. Time of Concentration, Te, minutes I 51 Note: minimum Te is five minutes , Calculated Data IktCalciilations1a.re~fof;the!BES_wate-r::riu:aI't\(&tOriri:10;83ilriChes'ofjralri'lri;24:houf81In!anlNRCSiTvoe11A'dlstrlbtitlon~&!w~~ Total Project Area, Acres Peak Flow Rate, Qpeak, cfs Total Runoff Volume, V, cubic feet Time to Peak Runoff, hours ~ 0,131 0,02 Runoff Hydrogra'ph . 0,14 i; , , , , , 0,12 ,: I" , , , , " , , , " " , , , , " , , , . 0,10 0,08 iJ ,,; o c o 0::: 0.06 2311 7,831 0,04 .j ,,, , , 0,02 / " , , , , , 0,00 , 0 500 1000 1500 2000 2500 Time, minutes , uatel Received: Planner: AL 6';;/~1 I' , i . ,~, .' KPFF CONSULTING ENG, JOB #305815 6/8/2006 Springfield Justice Center " Spreadsheet lIIustratin!=l Filtration Basin Required to Treat Impervious Area Actual Drainage Area = . 0.13 acres imp., WQ storm l . . in/hr Clogging Factor=!2 inlhr = 6.944E-05 ft/s' Soillnfiltratiori Rate = Adj. Soil Infiltration Rate = '6,9 3.0 SF . Planter Bottom Area = 75 IPASS:;;:j?':~~ ~ Results: Max. Cumulative Storage Dept~ of Stormwater (from column 11) = I' (1) (2) (3) (4) (5) (6) (7) wa Storm Inflow Cumulative Wetted Max Cumulative Time Inflow Volume Inflow Area Outflow Outflow Vol. 3.72 in < 61n Reservoir (9) Incremental Inflow- Outflow (cO -2,2 -2,2 -2,1 -2,0 LO (10) (11) Cumulative Cumulative Inflow - Depth Outflow (eI) 0,00 0,00 0,00 0,00 O,llO- (8) Inflow- Outflow (in) (in) ,(SFl (efs) (eI) 0,001 0,007 75,0 0.'005 81,3 0,001 0,008 75,0 0,005 84,4 0,001 0,009 75,0 0,005 87,5 0,001 0,010 75,0 0,005 90,6 n.M'" n-::t.:ft (cfs) -0,004 -0,004 -0,004 -0,003 (in) 0,00' 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 , 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,07 0.23 0.71 1,92 3,04 3.46 3,61 3,66 3,72 3,69 3,56 3.43 3,30 3,18 3,06 2,93 2,81 2,69 2,57 2.45 2,33 2,18 1,99 1,81 1,63 1,44 1.26 1.08 0,90 0,72 0,55 0,37 0,20 (min) (efs) '260 '0,00 270 0,00 280 0,00 290 0,00 300 ~n.nn 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 , 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 710 720 730 740 750 760 "_,,,,,, , Ru~off Inflow VS. Infiltration Outflow 0,02 0,02 ~ :: c~{~ o 0 0 o. 0 0 0 0 ~O.01 ~N (.) ii ~ ; ~; t;;: g ~ ffi , - (2) WQ Storm Inflow (cfs) , - (6) Max Outflow (cfs)' - (8) Inflow - Outflow (cfs) III u. u 0.01 g ~.~ as ;;t It) (0 (0 (0 r:: r--. Time (min.) 75~lJ U.UUb 75,0 0,005 75,0 0,005 75,0 0,005 75,0 0,005 75,0 0,005 75,0 0,005 7'5.0_0,000 14I::U::I 150,0 153,1 156,3 159.4 162,5 165,6 1l!8," u.u12-Ci~Cie1> 0,011 0,077 0,006 0,083 0,004 0,088 0,004 0,092 0,004 0,095 0,003 0,099 n nm Q..10.1 7.0 7,0 2,6 0,9 0.4 0.4 -0,2 _n" 12.U3 19,00 ,21.61 ,22,53 ,22,89 23,26 , 23.05 ''2,24 U.U13 0,012 0,004 0,002 0,001, 0,001 0,000 -o.OOJ v.v:.:: 0,02 0.Q1 0,01 0,01 0.Q1 0,00 o no Water Storage Depth ,I 4,00 3,50 3,00 II) 2.50 Q '5 2.00 .5 1.50 1.00 0,50 0,00 10 (11) Cumulative Depth (in)1 ~~~.~~~.~~~~~~~~~~~ ~ ~ 0/ ~ ~ . . . ~ ~ ~ ~ ~ ~ ~ ~ ~ Time (min.) _7T....' _.-LOV.-' ~. ,.~ 3.42 2,32 1.22 75,0 ' 75,0 75,0 0,00 0,00 0,00 0,002 ' 0,002 0,002 231,3 234.4 237,5 0,149 0,152 0,154 0,005 0,005 0,005 -0,002 -0,002 -0,002 -1,1 -1,1 -1,1 Date Received: rl,k.t:?~ ',Planner: AL 1:\c\p\2002\302134\DOCS\Stoni1 Docs\Commercial\Filtration Basin Actual Treatment Size Calc,xls,