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27807 PE-1750 SHELLEY LANE ~ ■ _ • . . DRAINAGEk TECHNICA:L REFORT ~~r the R ~~IVED SHELLEY LAI~EPTWAPa I as. PL~~ sPOKW FEBRL€ARY I996 i Prepared fvr: . . f.v .Y• ~r.Ni ` „,t m . . > > ~:~tylYDM e~~ ~A71d1.~`r;~kR-§;,', ' ~ „ • ~ ' 8205` N:` DiViSiDri StTEeL ' ' • . S~~~i~ane, Washington,9920$ • ~ ~ ~ ~ ~ Frepared By: , Indand Pacifce Enganeering C'ompany - ~ 707 W. 7th Avenue . 5uite 200 ~ Spakane, WA 99204 (509)458-6840 ~ - ~ ~ ~ ~ ~ - - - - Shelley Luke PUIJ I)rctanage Narrcztiue GENERAL The firsf phase of the Shelley Lake PTJD P1at is a devetvpment of 107 single family residential lats Pvcated south and east of the intersection of 4ih Avenue and Cvrilclin Rvad, Gvithin Sgokane Cvunty, Washington. 'Fhe site is currently Vacant witli field grass and faliow fields as the predatninant land cover and wegetativn vvith 25 to 40 acres ocCUpied by Shelley Lake, a nryvatelv_ owned lake, 5ingIe far,nily residential develvpEnent lies directly to the nvrchwest, west and south. A 1" Co 400' scale vicinity and 1vCatiQn map have heen included within the tech.ntcal section of this dacuznent. PURPosE , `1'he purpose of this repart is Co determirfe the extent of storm drainage facilities which wi11 be requireel to dispose of the in,crease in stormwater runoff created by the development of the ShePley Lake plat. The storm drainage facilities on this project wall be designed to dispose of runoff from either a ten year or fifty year design starm, depending uport basin size. This deveiapment is within the Aquifer Sensitiue Area of Spokane County and is subject tv '208' requirernents. Far this project the 10 and 50-year curves fram the 5pokartey Med1Cat L.aICe, Reardon, Cheney and Rockford inten.sity curwes were used. As we1l as the SCS isa-pluvia1 rasPnfall curves. Per directian frvm Spokane Cvunty, the SCS curves have been furttter refined with the NOAA iso-pluvial curves AIYALYSIS METHOD[1LOGY The Rational Method, which is recvmmended for basins less than ten acres sn size, will be used to deternine the peak discharges artd runoff volumes far all ansite basins. A11 off-site basins and all on-site basins larger than ten acres vvitl use the SCS Method to determine peak discharge and nanaff volurnes. PRQJECT 13ESCRIPTIpN This phase af the Shelley Lake plat cvanprises I07 lvts of the approved 262 lats and 459 units in the approved preliminary plat and FEIS dacuments. 'l he 5helley Lake subdivision is located in the Nvrth 112 of the SE 114 of the NE 114 of Section 24, T. 24 N., R. 44 E., W.M. wpthin Spakane Caunty, Washington, In2and Pactfc Engineenng Ccrmptxny l71 Sireldey Lake Plnt I)raanage Repnrr rOPOGrrAPxY Due to the existing topography an the site, Ratchfard Drive, which is the extension af Conklin kvad, is fairly centered alon,g the spine of aridge. This ridge fornYS a natural basin Pine as land - to the east of the ridge flflws toward the lake, while the flows to the west of the ridge flvw away from the iake. Within this area, there is atopvgraphic saddle iaying to the sauth af this plat phase and not•th af the preliminaty plat bvundary. Drainage within this saddle area and within this portion vf the ptat will naturally flow svuth and then east to enter the lake at t-ie southwest carner where there i5 a recognizable concentrated flaw p4inf. However, due to the absence af a tiiled crop, nv visible signs of cvncentrated flow have occurred during the fallow canditions that nvw exist. The flows fram the west side althaugh extending past the recagnized limits of 300 feet far sheet flow, generally are re,presented by sheet flaws north to 4th Avenue. The general slapes withire this plat vary from nearly flat within several nanaraI saddles to short slopes of u,p to 20-percent fvr that area east of ttae ridge tawards the iake and sou[h tawards existing Rotchfard AGres. Generally, the area within Chts platted pvrtian wvuld be characteeized as rvlling. Fvr devePvpment purposes, the nateiral sIoping was used for design and is maintained as pvssible throughput Che prajecC. S[ilLS As can be seen from the accompanyirag soils map frQm the Spokane Cvunty Soits Survey as perfarmed by the SCS, the site cansists of two types of soils all within the Class B type. These sails are as fallow. GgA - Garrison gravelly loam, 0 to S percent slopes: Soils within tttis soil type are some wYaat excessrvely drained sails formed in graveZly glacial outwash material frQm a variety vf igneous rvck. Surface runvff is slow, and the hazard of erasian is slight. Spakane County Guidelines far Stormwater Nlanagemenq indicate this to be a Sail Grvup Type B and pre- appraved for drywell installation. Hydrologic Soil CT.assicalznn - B GmB -Garrison very gravelly lnan, Q to 8percent slopes: This soil is generaily the same , as the Garrisan gravelly loam, with the on1y difference being that the surface dayer is much more stony and cvnCains aery Iittie lvam if any. Spokane County +Guidelines for Stormwater IVlanazement andicate this to be a Sail Grpup Type B and pce-approved far drywe@I installation. Hydrologic Soil Classification - B fn2and Paetfc Engrneenng CompanY D2 Sheldey Lake P!at Dralnage Reporr DRAINAGE dVARRATTVE C7ffsate BaSed upon the general geogxaphic tendencies vf this site, no appreciable am4unts af offsite flvws are expected for this phase. Any vffsite flows tpward this site generally will either be intercepted by Ratchfard Drive vr be passed directly through along lines af histarical CoItCeIltI`atiD IlS . Oi2$LlL As tliis plat is within the aquifer sensitive area Qf Spokane Caunty all rrnsite drainage will be collected and treated using the °208" runoff rnethod as described in the Spokane County Guideiines Far Stormwater Management. To facilitate Chis analysis the Shelley L,ake plat was divided intv 24 permanent sub-basins ( A thrvugh X) and three temparary sub-basins (A, B and C-temp). Although their are 24 basins these basins have been comhined in rnany instances to utilize the same pond. Table 1, lists the basins and pqnd combination5 for easy reference. Table Na. 1- Pond and Basin Sumamary . ~ . ~~~s,~~~,,,, , E~9 •./~;i'i%,~ . t`~ ry V ` , , F ...~1~ « ,FG~. A+ ~r f ~i f f } } ~~Ff Y ~ ' Tt~tat ~ia InpcxAa~ ~~rex9~ ~ `~9°', < r'•jFii•r, rr~~~~~~/~'rt'~Y C { r'}` F~~ i!+ r111~~~v~ ) ~~~i'! ~`v`a: ` . • + ~ • r A I A ~ 99755 ~ 18170 ~ 02866 I 2.29 S I C ~ 42412 ~ 13145 ~ 0 3825 I 0.974 c D 178405 ~30550 ~ 02784 14096 D E,F ~ 86260 ~ 13595 I 0.2682 + 1 980 E I I ~ 26488 I 20750 I O.7375 0608 F I 1 I 5950 I 2335 I Q.4443 0.137 Et4cF ~ I,d I 3243$ I 230$5 I (}.6$37 0.745 G ~ G I 35310 I 9515 I 0.3542 ~ 0 811 H N I 2 Y 148 I 13780 I 0,6396 ~ 0485 I X I 28221 I 14567 I 05371 ~ 0648 7 I H,M,U,Q,1-I h~ 296568 66172 I 03173 I 5 808 K I 5 ~ 20080 6714 ~ 04008 I 0461 P I P 44845 7438 02744 ~ 1.029 Temp A 1 A-templK(L) 35073 19$35* 05144 ~ 0.805 * Note, Basin A-Temp has 14593 sqft of grave9 a C=O 50 per 5C5WMG In2and Facafc Engfneerrng CorVany B3 .5hedley Lake P[ar Dratnrage Report „208" Calculations Within each basin the s[reets are divided 1k1to SE1Y,1-baSIn.S by Cllxb d1'0p5, inlets or catch basins which capture upstream stormwater runoff franna the irnperviQUS street surface and direct the runoff intv grassy '208' pvnds. As shavan an the '20$' calculation worksheet included, the '20$' stvrage Volume provided is adequate ca perform '208' treatment for rhe runvff created by the first half inch vf rairrfall. Zn some cases, r.he ponds are nat quite large enough to pravide '208' storage far all af the upstream runvff. In such cases t.he excess is carried over to the next dawnstrearn pvnds which provide adequate capacity for the cariy-over flows. HaweVer, far the ShePley Lake plat no carryover flow are anticipated Curb Drap, Tnletfi and Catch Basin Calculatians It is necessary to check the adequacy of the curb draps, inlets or catch basins prvvided to divert the runoff fram the gutter intv the '2[]8' ponds. The curb drop, inlet and catch basin ca2culation sheets included show the required lengths af curb openings, or single curb drops with lengths greater than 4,0', as well as the adequacy af the inlet grates or catch basin grates. For curb drops greater than 4.0' either multiple curb drops are added or the curb drops are Iengthened as tequired. lnlund Pucrfi'c Enganeerin$ Company - D4 5hel2ey Lxrke P2car Drarncrge Repon I?RAINAGE CALC'UL.4TlO1VS SUMMARY Calcuiations have been included fvr Drainage Basin consideratians such as QTR 55 and pond rauting ealculations, Peak Ffow, Time oF Concentration, "208lr 51ZII1g, drywell requirements, inlet sizing, curb drvps as weIl as culverts and pipe fiaw some of which are sumanarized below with the remaining calculativns in the appendix. Wbthin the calculativn sectivn several sketches, as well as details from the plan.s have been incorparated tv demvnstrate assurnptivns and conclusions. Table IVo. 2 - Pvnd and 20$ Basin Summary 6~- , , r'r~~1~~@',~•~,`~f~` ° ~i~.~,~~~~~r€«.~, ~'~~.~,,,,,'~'s,•,.y~xs ' , . , ~~i ~ //.~w<- • a, , F ~~'ii~~G`.. n,~~' _Pf!p€d B"ill 208 Volu"le" 20,$`A€'e~V ,20$,,A`r,~~ J)'"e115 ~ ` 40~i" ~ +"t~ ~R d st~i<< y '~;~'c~~ded Re+~u~~red, f,•~ F,~~..:} , . F ~ }aFy; F {1 y, t ~ , `r ' , , r~ F. • ~ f~~ ~ r ~~y-qT . r s +~,.f~i,~~~ss~~~'~+ A A 757 1514 1905 IB B C 548 1095 I2$5 IA c D 1273 2546 2933 i B n E,F 565 1130 1516 iB E&F l,I 962 1924 2033 IB G G 401 802 1112 IA H N 574 114$ 1190 IA I X 6(}7 1214 1 354 1A I H,M,Q,Q,R 2757 5514 5533 2B K S 280 560 560 IA A Tem,p terrap A,K 826 1552 1652 lA F' P 310 620 620 1 A Type A'ss a Spafcane Standard Drywelf - Single Depth, Capacity il 3 cFs - Type S is a Spokaile Standard Drywele -DoUble Depth, Capaciry 1 D cfs Infaru! Paerfrc Engrneering Comprtny D5 Shedley Lake Plar L?rainage Reporr Table IYn. 3- Cu~b DroplCatch Basin Sumrnary ~ ~ ~ . ~ . N,,, > , : . ~ 4 ~ ~.~f• .60001ndR F ;~hetley ~~~i %;rnrima~ » ~ w ~~.`~,,r,...._- ••:<<,~=~`f••=• , , , 3 ~ ~ ' ~ ~~~~~r } r } ~f { ; • • • . • ; . , ` , ~~~oh~di~~l~ F ;•r,,' , ~f~, , C I) on grade - G G on grade - H N on grade - - Conklin Rd 9 on grade - 4th Avenue - on grade 7 H,M,O,'Q,R - on grade & sump Per 5pakane Coonry Guidelines curb drops in a sump canditivn have a capacEry bf 4.0 cfs Fer WSIJ[3T Hydrauhcs Manual, Grate Inlet, has a sump capacity af 13,4 cfs NOTE: Cln1y curb drQp and grate calculations were perfarmed fmr thvse cases "[)n Grade", curb drvps and catchbasins in sunRp condi#ion are assumed to handle 4.0 cfs. Infund Pucif c E►rgineenng Camprany j}6 Shelley Gake F'fnt l7raanccge Report APPErDrX lndttrtd Paci]ic Engineering Company Shedley Luke PlaC Drainage keport FIGURES fntand Parifc Engiraeenng CorVany She!!ey l.ake Ptut Drarjuage Repcrrt ~Jr ~ + • ~ - o 4 T~ 752 ^ ~ . . 2035 !.3 • ° en c ; , ` 14 I . . ~ ~ . e . `'1... • . ~ . ~ . . a n i - l ~ J {~l Prvgress . .I ; , • . . . u 5ch a ~ • o ~ 2032 ' . ' q ~I • •.I ~ 1 , 0 . ~ . • LVe'9 S' • • • ~ ~ ~ il~ O °c ■ ;a . • ~ ~ . +s~ • ~ wAV • _ ' . vj , VALLEY • . ~ . . ~ ~ ' •@• ~ . ~ 4°• ~ 6 . ~ 9 o ° I I . ~ ¢ r , . . ° ° a ' •~M Jr High I - ScR a - 4 : ~ ~ ~r = _ ~ J ~~..I • . . f ~ ~~:r . • ~ •r ~ - . 4~ •!F VerCLdU~le• ` . ' u. ~ I . ~ . ~ • .~1,~ . . i II 6 Z13.ME ~ . • 1 4 tAAI~.• • •A f• ~E,;%•• ~ + C, ~ s • ~ • • • e. . .-5~ u, • a ~ ~1J=.J- r~ • r a I. ~ l • ` ~ • ~ • : r. • ~ • : ~ ~ ~ ~ • - ~ a ~ O 4' 0D,•9~ - Mi I wau~cke I: ~ sr- PaUL ~'AGIFfC ; . . , , ~ , - .r ~ ~ , ~ • ~ • . ~ ~ Vera' ~ ~ ~ i • i L ~q 4 i U . . . . . -rH avIf Tia'11er` a a~ e a~ y • Park ' . • - ~ 5~''el~;,e ~ ° . _-i • - r Adams "j ~ Sch ~ m ~I - • ~ ~ I ~ ~ r~ff ~ I I . . f ~ ~ I ■ ~ •-~'~I , ' ` ~ Cerstral Valiet. •~l %~I. High 5ch Sew% . 23c ~ . • - _ . • ~ • • ,'I.... .i. ' x a = o . . . . . ~ a. . • 31 Ei @ ~ ^ ~ a c • - 'S ayP!ti _ q . . ° w r _ ~VV~ 0 • ~4~` ~ ~ A U+ nR • Q _ b . ► 1~ an "`i'~~ ~ _ " Q fl r%' - {I Q: ~ ~ Y ~fl,rff ~ r~ ~ + . ~ z ` ❑ . . - - ~ o~ ~ . • ~ . - - . ~ ' ~f r~ • ' V C -Y MAP NQT TO SCALE - - • - ;r- . . ■ _ _.E . _ , _ . _ - , ~t~,• ' - ~ ~i~^'~: . • - . ~ a _ _ ax ~ • _ . ~ ~ 4p,j €~A 4'!~ ' _ ~p. x ~ `;`~~'-yl• 'r ~ ~"'ic•` ~SLF~' • S ~ ~ ~ , "f r,' a~a ~ i ' i i ~ ! ~-r ~ ~ e 1s J t ~ _ ~.y ~ f~ 1 s I~ ~ ~ "e~ ya ~j + • ~ - , ' L ~ radale ~ ' G~ti ~ ~ ~ , . .~u:~~$#~ ~ ' ~~~'k•t~ _ ~ ' .i~ Y ~ ~ ' i : a ~ ~ i I : . r ~ r'~ ~f~1~~~' ~~19 ~ } - • f . ~ . , , ~ ~ GgA}~ ~ ~ -n~r~w.+ux~e sr~nc~e. .aNO - V~ ~ a i ~ _ . ~~h' ~ ~ . J '•d ' ~ Lii ~ • ~ ` • =Utradale. • ' . . . Gr,n .t ~ ~ • r ~ "L P~~ . ~ l ~ +~:PY~B~+ . r • a~ ~ ~ i i 45 4 _ :l~! r' i~ 1' ~ II _ • . y y ' ~ • GgA ~c~1r aRc ~ ~ ! . 1~ Grnfi• -C~ Ta ~ ~ ~ CkC .rlc~ f~ Crnfi.il V7 24 ~ ~ ~•~~L PeA ~'oA . ~ . • ~ r~° 5clinnl GmB s.. t ~ . PsA ~ _ ° ` 1 . • r ~y S"ig8 r,9 Ht$ , Y S1T~ s~ 6 L "'e~ W k F v. lis$ ~ - j ~ • 5 E . ' Gm8 0 fHS6 Bs6 11N6 p;q "B F 85B ~r H ~ J~0 ~ S~a v' ~ F PsA + / r °az~~~--^-'f- ~ ~ . ' ~MvC a ~ - " • ° ' - . ~ ~ PsA J r . s' La8 ~Cn B r ~ ~ ~ , _ ' .y l.l h9 YBkG, CoB ~~Bi ~ • - ' { ~'gA, fBBlB r`~~ • ~YY- w~S , ~ ;r~ .,,,y•„ ' . Ni6 jtll BaB • i~ 1 ~ ~ . i~ ~ ' A~e~ .~«a • • . d ~y~~-,w~F• . ' ~ w = r' ~ ~ 1 l; '4"i y ~ r Ca' ►inn Pse x ~ _ ~ , ' ,Co6 i - ' ~ . ~ ~ ~t~,'ti►~'`"f~•~ as0 ~ d ~ r GgA . { ~7 hA• : J GmB y r ~ CuB r ~ A 9 LE4EIl[D: t ~ SuE pOq Garfisprb qravally Fvam. U to 5 parcenS slopes Qg8 Gerrnon qravelly 1pam. f Ro 20 pe►ppnt slopes . Gm8 CinnrZsE►n rery graveliy IQam, Q to 8 percenf, slopes StC Spokane wry rur.lcy eamplex, 0 ta 30 percent slopes ~~i i -StC• ~~AC ; SuE 8pokena eztremely racl[y cnmplan. 20 to 70 parasnt slopes , ~ GrnCi I ~~,w , , ' . ~i. _ . ~ SAURC£: SPOIU4HE COUNTY S[]IL SURVEY IMANUAL ~ DATE: JANUARY 1994 ~ SCAI..E• NANE Fl[317RE NO, PitDJEC'[ RIO.: 92-032 SOILS MAP G I; SHELtEr LA1CE PRELIMINARY PUD PLAT C~Cimm ~~~.o~c~t,~~., ~►zc. ENVIRONfNENTAl IN1PACT STATEMENp ~ f ; T►4BLE 2 Soils Characterist[cs ' # n { f~; • , ' , t, , , virA rER . Lo,a p- , • PeRcEivr ERoseaw xaurIN~ SHEAR caRRy►Nc a'GRrcuL rURAIL MaAPf►vc uNrr • seaPE. ° parE+rrMt . PER►wEae►cInf .RuN-'a)F rcAPAc►rr srREnrOrH c.aPA crrv sr,asturr c.aPAewrr ; GgA 4-5 S!i$ht Moderately 5law Moderate Hiqh Hiph Moderate Illa-2 tlflwy rapld tv law GpB 5-20 5light Moderate to Slgw Moderate Hiph High Moderate IVe•5 (low) Yary rapid , to fow Gm8 0•$ Moderate INladerete ta Medium ' Moderate ldigh High Moderate IVe-5 tlowa Vaf}I FBpld to lvw 5tC 20-70 Moderate to Moderate Medium Moderate Low Fiigh Low Vlla•^s (very ecvere to faw rocky) $uE 0-30 Moderate Moderate tv Msilium Maderste Law High Low Vlls-2 (very rspid 4a 1uw rockyl Source: US Depaftment of Agriculture Sofl Cansenratian 5eMce, 5oil 5unaev of Sookene Cauntv_ Waehln on• a988 Shelley Cake EIS 34 fe6ruary 1994 RUNOFF COEFFICIENTS ANI) PONDIBASIN SUMMARYES Inldnd Aacrfrc Engineetiatg Company Sheddey Lu1ce Plaa FJrainage Repon 5helley Lake, PiJ❑ Runaff Coefficient CalcuPations Bas in ~ TataC ~ lm penr ~ G° Surn Ae a ~ 99755 ~ 18170 0.2866 ~ 2290 B ~ 96320 22235 03231 ~ 2211 C ~ 42412 ~ 13145 ~ 03825 ~ 4.974 o ~ 178405 ~ 30550 ~ 02784 ~4.096 E ~ 31165 ~ 6585 ~ 03080 ~ 0,715 F ~ 55095 ~ 7030 ~ 02457 ~ 1 255 ~ ~ G 35310 I 9615 ~ 03542 ~ 0811 H 28170 ~ 6888 ~ 03334 ~ 0.647 ~ i p 26488 ~20750 o.7375 ~ 0608 J ~ 5950 ~ 2335 0.4443 ~ 0.137 IC ~ 5934 ~ 5242 ~ 08125 ~ 0 136 m ~ snavi ~ 12863 ~ 0.2638 ~ 1.947 ti ~ 21108 ~ 13780 ~ 06396 ~ 0485 O ~ 33370 ~ 7170 ~ ❑ 31 1 1 ~ 0766 P ~ 44845 ~ 7438 ~ 02744 ~ 1029 a ~ 42827 18675 ~ 04770 ~ 01983 R ~ 107400 w 20576 ~ 02937 2.466 s 9 200e0 Y 6714 I 0.400e ~ 0461 T 1 27960 I i&;li]Q 0.6436 0.642 u ~ 23460 ~ 16520 0.6781 0.539 V ~ 11780 ~ 10600 08249 ~ 0270 'W 11780 ~ 10600 0.8249 ~ 0270 x 28221 ~ 14567 ~05371 ~ 0.648 a aemp 1 29139 ~ 14593 03253 ~ ❑ 569 ~ Totai5 1 1062636 1 aoaaas ~ 03620 24395 ~ She[!ey Lake. PUD Pand and Basin Sumenary Pond lBasirrs 17otal lImperv C ~Sum Ac f ~ A IA 99755 1 18170 0.2866 I2290 6 IC 42412 4 13145 1 4.3825 ~ 0.974 I c I❑ 178405 1 30550 1 02784 1 4096 D JE, F 1 85260 ~ 13595 1 02682 1 1 980 E 11 I26488 I 20750 I 07375 I 0,608 F 11 1 5950 ~ 2335 1 ❑ 4443 1 0137 E&F Ij,j 1 saaas ~23085 1 06837 1 0745 G IG 1 35310 1 9615 1 03542 1 0811 H II'$ 1 21108 I 13780 1 06396 1 ❑ 485 I IJC 1 28221 I 14567 1 05371 1 ❑ fi48 J IM,O,R,Q.H 1 298568 1 66772 1 03173 1 6.808 K 5 f 107404 ~ 20576 ~ 0.2937 ~ 2 466 A Temp „A temp. K ~ 35073 19835 ~ 0.5144 ~ 0805 CiRB DROl' ANALYSIS tj_ ~ A t~ ~ - ~ " Inlund Pae;fc Engineering Company Shefley Lake Plaa Drdrnage Re,por[ ri GGRB {7PENINGIC]FiOP ANALYSIS FORM This farm is hased upon Figure 16 in the Spokans Gounty Guidefines fior Stromwater ManagemenT Sheiley Lake Spokane Ccaurrty, Washingtan Date 02f06/96 Engineer 3RW Note, this sheet is heing provided to determ3ne the arnount of capture fvr the ourb dreaps on grade within the Shelley Lake PUC] Plat, Phase Laaat3ons Roadway Super F3nadway Peak 17epth of Oa/La Flow Width Req'd Opening 51vpe RaFe 1Nidth Flnw Ffow !n Street LengYh I 4ft1ftl ~(ftlfs) tlSft) I{cts} I(ft) I I ~(ft) I d I I I-~ I I I- . s, . c,•,,;; v , ~ • s~~~-~ a ~;tw~;~>-^~I ~ ~ : At Pvnd H ~ 0039 ~qyp.02 ~ 20 1 0986 ~ D 124 ~ ❑{l86 ~ fi 2❑ 1 11 448 + y „ r```F +f ~ff•~'~ ~ ~,C ~Fr ` , I i \`rn\J = ~'F~ } r~. At Pond G 0.012 ~ D.t?2 15 3 0.'~I7 0.236 0163 11.81 1 18 583 5ee Note 1 „~.c,..,,,r,` B ~`.v'~/i,FF,```~ \F~ „`41s,~`,~~. ` '~;:,s:~,"'~%'.%:~+, . ...t~;,~,;-`v.m a,~,, ` .:~C`„ µ\Uaw.: { Note 1- This curb drop [s the first curb drop for a pond wi#h two seperate curh drpps. Therefore, ihe trltimatQ length is not required as the seeond cvrb drop is 4n a sump condjtvn. Nvwever to seperate flaws infca the pvnd two 4-fovt curb drops will be placed at the upper location Capture is expected tv be approximately 4.80 cfs with trvo 4-foat curka draps, see calaulation below ~ ' i1a '~~i•~~' 1 ,A . . ~ ~ »>x... , . r . an . , [44 ~p~+~~~ U v a~ ~ i~J4 3.~t~S~i~~,i!'~'' ~~+:i•, i 2ci^yG~'Q~•`. -J1.::ii:0y'ro-, . ~ f ~ • ~,,n + GRATE IN.~~~ ANALYSIS ,Infanct Pacic Engineenng Cgmpany Shefdey Lake Fdrrt IJratnage 12epart ~ lNLEY RFdALYSi$ FBFiRq Fhis farm rs es tcsund an the WSDflT liydraulic Menuxl Fgure 5-5 1A fw Inlet 5pacing Galculauocss 8h[lfey Lake FiiJp - F'hase 1 Shdley Lake PiJfJ Spokene CoLiniy, Washingttxr Grate Wdtl5s W$fftngbOfla - 1 BT DatB 02/06(99 Yaned - 1 87' W52X]T Gra[e Inlet = 2 08' (ncrrmal ta cur6) Engcrtem TRW WSCiOT Grate INet = 400' (pprpendicufar to curb) wSOp7 Grate Inlet = 2 98' [normW to curb wl v 10 sump) R I 8 I c I a I E I F I c I H ~ ! I a I K 1 L ~ STAPIpN ROADWAY W pISTAiJCE FLflW FL41Ar TO GLJTTER SLFPEFl GFiiATE DEPTFi GUTTER GCJFTIER 9Y-PASS WIQTH BE3'WEEN BET6NEEN IAiLET SLpRE RATE WIpTH QF FLOW VELQCITY FL6W INLETS Ce's FLt]YV NJIpTH tft3 tft; (r=) [crs) (Cf9) {fvn) fRift1 [ft] (n) [ft) (fvg) (crs) Basins FA and O Ce[ch Basms No 1 mrough 5 No[e C9 No 1 is in a Sumq Casdi drm NQ[e CB No 2 is aS e High PCanB Nate CB No 5 4 8nd 5 are in sump C[xlditianst] •f~~,~,.,,. /~..o ' ~ i'ri I I I I I ~ , ~ r.r• O 057 ~ ,~oa:ss`~Gf . . ~'y,P~„~,,,a.~~•~:'= ~'~~~ti~~` y<<F~ox~~' ` j''f!fi.`^iKr~szfdudR`,'~i~~i,:L. cBNo 3 I15 IQOaa I002 1167 F{~/10094 Ien sas 12964 1o aw '}`~'~'/.'q.l,~i, [r!f/F/////4~ itvt~` ~ `~f `"~'rr~if !~`.If.•133:1', \k~ '~*".rk~`v~~.Snf6~;," F~F > > r.~ r.~:`F'f<<<t<«\4 PIPING I3IAGRAM~ BACKWATER CALCULATIC]1V a PIPE FLOW CALCUI.ATIONS Inland Pucrfic EngrnPenng Company ShePley Lake Pfrrt DratnQge Report / ~ ~ - 1 BUT. EL. 2029.00 W.S. EL 2429.80 AT POND "J' Ce #6 OUTLEr TOP EL. 2032.75 IN I.E. 2029,30 1(r 13.5D LF. ' 4UT Q.E 2029.20 O A148 SLfMP CB P *1~ f 1.88 CF5 1~ ~0 LF CB fl ~P~ 1 2' ~A L.f'. ~ ~2 Q .0218g ~P ~ 1 ~ 28 LF 1.51 CF5 cH #3 1r 7i8 LF. 0.0125 10 .023917 pMP G CFS ~ ce #9 rvP aL 20440.72 0.67 c~ 8 14 I.E. 2038.62 cB #2 ~ suMF r~vP 2o42.az IN LE. 20 37.62 ~ OlJ'f I.E. 203752 CB 43 1.44 !F5 AT H.P. TOP El. 2035.23 IN LE. 2033.13 CB #4 OUF I.E. 2(}33.03 TOP EL. 2032.75 f7N GRAOE AT -0.0400 IN I.E. 20341.25 I (3UT I.E. 2029.65 SUuP ~ ~ LEGEN D ~ ~ CATCH BR5[N I y F'iPE FLflW (xxx) !Pf CFS GUTTER FL,OIAi (xxc) 1N CFS ~ FI:DW CAP7UREQ 0Y GFtAI'E (01V GPADEL XLXX) aN CFS N,7.5 . ■ ~;TOR M D F~~11 NAGE D ETAILS INL R PACiFIC I5HELLEY LAK E P. U. D. ~ENGINEEFiI~~ 707 ~r~t 7tn • su~Q zfla (~s) 488-680 ~Z/13/9fi ~ ` spokane, WA 892o4 FAX: 458-6&44J, Backwater Calculation Sheet Sheiley Lake file - Backwat3.wq1 Pipe Segment cb1 to pnd j cb5 to cb4 cb3 to cb4 cb2 to cb3 cb1 to cb2 1 Q 5.30 3.62 2.18 1.51 1.51 2 Length 13.50 28.00 116.00 200.00 200.00 3 Pipe Size 1.50 1.50 1.00 1.00 1.00 4 n 0.024 0.02 0.02 0.02 0.02 5 Outlet EI. 2029.00 2029.30 2030.25 2033.13 2037.52 6 inlet EI. 2029.20 2029.65 2033.03 2037.52 2038.62 Slope 0.015 0.013 0.024 0.022 0.005 7 Barrel Area 1.77 1.77 0.79 0.79 0.79 8 Barrel Vel. 3.00 2.05 2.78 1.92 1.92 9 Vel. Head 0.14 0.07 0.12 0.06 0.46 10 Water Surface EI. 2029.80 2030.62 2030.82 2034.07 2038.35 11 Frict.loss 0.12 0.08 1.47 1.21 1.21 12 Entr. HGL EI. 2029.92 2030.70 2032.29 2035.28 2039.56 13 Entr. Head loss 0.13 0.06 0.11 0.05 0.05 14 Exit Head Loss 0.14 0.07 0.12 0.06 0.06 15 Outlet Ctrl. EI. 2030.18 2030.82 2032.51 2035.39 2039.67 Inlet Ctrl. HW 1.42 1.13 1.04 0.83 1.09 16 Inlet Ctrl. EI. 2030.62 2030.78 2034.07 2038.35 2039.71 17 Appr. Vel. Head 0.00 0.00 0.00 0.00 0.00 18 Bend Head Loss 0.00 0.00 0.00 0.00 0.00 19 Junct. Head Loss 0.00 0.00 0.00 0.00 0.00 20 Headwater Elev 2030.62 2030.82 2034.07 2038.35 2039.71 Grate EI. 2032.75 2032.75 2035.23 2042.22 2040.72 Freeboard 2.13 1.93 1.16 3.87 1.01 INLAND PACIFIC ENGINEERINC Circular Channei cb5 ta Pond J Flvw 5.300 cfs Diameter 1.50 ft Slope 0.0148 ft,lft n 0.0240 L 13.50 ft dJdia A R Q V Depth 06 ffvw,d 0.23 ft 0.15 0.1663 0.2090 0.44 2.56 Flowing Full 1.50 ft 1.04 1.7672 0,5625 909 5.15 Critfcal ❑epth 0.885 ft 0.59 1.0850 0.6194 530 4 89 Narmaf [3epth 0.975 ft 0.65 1.2159 0.6482 5.30 4.36 HWc 1.441 ft HWn 1.418 ft OUTLEY CONTROL iNLANa PAClFIC ENGINEERING CircuPar Channel cb4 to cb5 Flvw 3.520 cfs Diameter 1.50 ft Slope 0.0125 ftfft , n 0.0240 L 28.00 ft d/dia A R Q V aepth vf flvw,d 0.23 ft 0.15 0.1663 0.2090 0.41 2.44 Flowing Fufl 1.50 ft 1.00 1.7672 0.5525 8.36 4 73 Critical Depth 0.720 ft 0.48 0.8386 0.5477 3.E2 4.32 NarmaE ❑epth 0.510 ft 4.54 0.9736 0.5895 362 3.72 , HWc 1.154 ft HWn 1.132 ft C3UTLET CQNTRaL INLRND PAGIFfC ENCINEEFiING Circufar Channel' ch3 ta cb4 Flow 2.180 cfs Diameter 100 dt Slape (].0240 ft,1ft n 0.0240 L 116.00 ft d/dia A R Q V Qepth of ffaw,cf 0.23 ft 0.23 0.1365 0.1364 0.35 2.55 Flvwing Full 1.90 ft 1.00 07854 0.2500 3.00 3.81 Critical Depth 0.530 ft 0.63 0.5212 0.2839 2.18 4.18 Normal Depth 0.630 ff 0.63 0.5212 4.2839 2.18 4.18 HWG 1.037 ft HWn 1. 037 ft INLANQ QACIFIC ENGINEERING Circufar Channel cb2 tQ cb3 Flow 1.510 cfs ❑iameter 1.00 ft SIQpe 0.0220 ftlft n 0.0240 L 200,00 ft d/dia A R Q V Depth flf flow,d 0,23 ft 0.23 0.1365 4.1364 0.33 2.44 Flowing Full 1.00 ft 1.00 0.7854 0.2500 2.87 365 Gritical Oepth 0.520 ft 0,52 0.4127 4.2561 1.51 3.65 Normai aepth 0.510 ft 051 0.4027 0.2531 1 51 3.75 HWc 0.832 ft INLET CONTRDL HWn 0,837 ft INLAN❑ PaCIFPC ENGINEERING Circular Channel cb1 to cb2 Flow 1.510 cfs [3iameter 1.{]0 ft si❑pe 0.0050 tt/ft n 0.0240 L 209.00 ft d/dia A R Q v Qepth of ffow,d 0.23 ft 0.23 0.1365 0.1364 016 f 16 FIvwing Full 1,00 ft 1.00 0.7854 02500 1.37 1.74 Crit+caE ❑epth ❑.52a ft 0.52 0.4127 0,2561 1.51 3.6E Nvrmal Depth 1.00(] ft 1.00 0.7854 0.2500 1.51 1.92 HWc 0.832 ft HWn 1.086 ft OUTLET CONTROl. INLAND PACIFIC ENIGENEERlNG ~ ~ P El_. 2p35.83 0.63 CFS `5 T I.E. 2033.45 ce SJMP - ■ ~ ~ 12" 104 LF. CP'D~8 ~ ~ ~ ~ OUTLEf I BD7. a- 2102$.00 W.S. El.. 2029.80 AT POND 'Jr ~ ti LEGElVD -00~ I m CAQ1Ci BJtS[N i R!PE FLOW (xux) fM CFS GLITTER fLOYV {xxr} !N CFS ~ FLOW CAPTURED BY M1'E ~ .fQN GR►1DELIXXX) IhE CFS J I Pd.T.S./p ~TORM DRAI NAGE DETAI LS INL14ND PACIFIC 1~;H ELLEY L4K E P. U. D. ~ ENGINEERING 707 W~ 7t, . ~~o 2~ ;ss-~ao - ~2/, 3/ss ~,Spokana, wk 99204 FAc: (WO) 458-6844 OF Backwater Gafculation Sheet 5helley Lake Pipe Segment cb6 to pond J ~ 1 ~ 0.58 ~ 2 Length 104.00 3 Pipe 5ize 1.00 4 n 0.024 5 Outiet El. 2029.00 +6 Inlet El. 2033.45 Slvpe 0.043 7 Sarref Area 0.79 8 Barrel Vel. 0.87 9 Vel, Head 0,01 10 Water 5urface El. 2029.80 11 Frict, Ivss 0.13 12 Entr. HGL E1. 2029.93 13 En#r. Head loss 0,01 14 Exit Head LvSs 0.01 i 5 Outlefi Ctrl. El. 2029.95 Inlet Gtrl. HW 0.53 16 Inlet G`trl. E!. 2033.98 17 Appr. Vei. Head 0.00 18 Bend Head LoSS 0.00 19 Junct. Head Loss 0.00 20 Headwater EEev 2033.98 Grate El. 2035.63 Freeboard 1.65 R'lVLAND PACIFIC ENGfNEERIiVG Circular Channel cb6 to Pond J Flow 0.680 cfs Diameter 1.00 ft Slope 0.0428 ft/ft n 0.0240 L 104.00 ft d/dia A R Q V Depth of flow,d 0.23 ft 0.23 0.1365 0.1364 0.46 3.40 Flowing Full 1.00 ft 1.00 0.7854 0.2500 4.00 5.10 Critical Depth 0.340 ft 0.34 0.2355 0.1891 0.68 2.89 Normal Depth 0.270 ft 0.27 0.1711 0.1566 0.68 3.97 HWc 0.534 ft INLET CONTROL HWn 0.638 ft INLAND PACIFIC ENGINEERING ~ ~ I ~ ~ ~ ~ ~ BdT. EL. 2038.87 W.S. EL. 2037.67 AT PONf3 'd' I Ql1TI.Ef ~ 17' 3;F LF. a .01242 VCB #9 ce #S ■ .82 CFS 0.64 17 LF 4 A100 CB #8 I 1"' ~ 2039.74 T0P EL. 20388 4 tN I.E. 2037.38 SUMP 09Ji' I.E. 2037.28 SUMP ~ ~ LEGEN❑ ~ ■ C14TCH BASIN ~ I s RIP£ FLOW (aria) IN GFS ~ GUMR FLAW (Xxx) IN CF5 ~ FLC1W GAPTURM 61' GRATE I~ ON GEZAUEi c) IN CFa ~ ' N.T.S. ~ a ~ iTOR NI D RAI NAG E DETAILS ~ PINLAND ACIF C I SHELL'EY LAK E P . U . D. ENaINEEAING 707 wed 7tt, • surta 2na (3n9) fss-sW 02/13/96 ~ ` Spokow, Wn 99204 FAX: (Ws) 4W-"",F Backwater CaEculatian Sheet Sheifey Lake file - Backwatl.wql Pipe Segment cb9 tv pnd dcb8 to cb9 1 Q 1.46 0.82 2 Length 33.00 28.00 3 Pipe Size 1.00 1.00 4 n 0.!]24 0.02 5 D utlet E I. 2036.87 2037.38 5 Gnlet EI. 2037,28 2037.56 Slape 0.012 0,010 7 Barrel Area 0.79 0.79 8 $arrel lfel. 1.$6 1 04 9 1lel, Head (].05 0.02 10 Water Surface El. 2037,67 2038,09 11 Frict. lass 0.19 [}.05 12 Entr. HCL EI. 2037.86 203814 13 Entr. Head lass 0.05 002 14 Exit Head Lass 0.05 0.{]2 15 Dutlet Ctri. EI. 2437.96 2038.17 f n f et Ctrl HW 0.81 0.58 ~ 16 Inlet Ctrl. EI. 2038,09 2038.24 17 Appr. 1lel. Fiead 47,00 0.00 18 Bend Head Loss 0.00 0.00 19 Junct. Head Loss 0.00 0.00 20 Headwater Elev 2038.09 2038.24 Grate EI, 2039.74 2039.74 Freeboa.rd 1.+55 1.50 1NLANa PACIFIC ENCiNEERING Circufar Channel cb3 to pvnd D Flaw 1 .464 cfs Diameter 1,00 ft Slope 0.0124 ftlft n 0.0240 L 33.00 ft dJdia A R Q V Depth of ffow,d 0.23 ff 0.23 0.1385 0.1364 0.25 1.83 Flvwing FuIE 1.00 ft 1.00 0.7854 0.2500 2.15 2.75 Critical ❑epth 0,510 ft 0.51 04027 0.2531 1.46 3.53 Normal Depth 0 600 ft 0.60 0.4920 0.2776 1.46 2.97 HWc 0.816 ft HWn 0•8{]5 ft CaU7LET CDNTFiOL fNLAN❑ PACfF1C ENCarNEERING Circufar Channel cb 8 to cb9 Flow 0.8Q0 cfs Diameter 1.00 ft 51vpe 0.0100 ftjft n 0.0240 L 28.00 ft d/dia A R Q V Depth ❑f fivw,d 0.23 f# 0.23 0.1365 0.1364 0.22 1 65 Flowirrg Ful1 1.{](] ft 1.00 0.7854 0.2500 1.94 2.46 Critical ❑epth 0.370 ft 0.37 ❑.2542 0.2020 0.80 3.03 Nvrmai Depth 0.440 ft 0.44 0.3328 0.2294 0,50 2,40 HWc 0.584 ft H1Nn ❑.575 ft OUTLET CaNTAOL INLAND PACIFIC ENGINEERfINC r l I I ~ A CS #7A 18" 17 LF Q .0100 h, DW #l w °w ~ I r'~1 LF. ~ oF .0100 s, ~ , e e ~ ~ ~ ~ . ND ~ ~5~! ■ BA51 H 11 PfPF FL(7W {xxx} IN CF`5 GUTIER FL(]IN (Xxx) IH CF5 FLOw c,M2TuREa Br cwarE ~ (DN GRAID~~.j=) IN CF5 0/ I N.T.S. J . ~ ~ YORM DRAINAGE DETAILS ~ 1NLAND HELLEY LAKE P.U.D. PACiFic ~ EN+GINEERINQ 12 20 95 ~`0x west ith • su;ce 2~ ~-sm ~ ~ Spokarse, WA 99204 FA)!: (gM) 438-6844~ ■ ~ TIME ANT] 248 CALCULATIONS In2cenri Pcrcrfrc Engrneenng Co+npcrny Sheldey Luke Plad DrarnAge Reporl 'j,~~,~` BCSWSTRlNt3 NiETFiQO FqCSJECT Shdley Lake - Phese I PFAK FLC]W CAtCl7LATfON FR[7JECT, Sh~lsy Lslce- Phisaa I pETENT9L5N BASfN CIESIGN BASlN A BASIk' A ~ ~FDES1CaNE6i TFiIN Tot Ares 2,28 Acres z'~ pATE 1113[7{95 tmp /lree 11317Q SF C= 029 Time Incrernent (rrsin) 5 824 CASE 1 Time o1 Canc. (min) =d~~~=n CSutffow(cfs) t 1DD 1t Qveiiand Rsnv Resi$n Year Florr 10 Afeti (b.Gres) 2 29 Ct - 0.15 Impervlexrs Area (aq tt) 18170 L= 1DO ft. C' Fae[ot 4 20&8 n = 4.40 ,208' Vdume Provlded 2a5 3 Q 0 08E? Area " C 0.656 Tc = 293 mirs, by Equabrm 3-2 ot Guiddmes Tima Time Inc, Intens O Devel Vd In YW fm SYrrnga 90 n k. Guner now ~ [min] (sec) (mp,l (crs) qc~ it} (cu ft) [cu ft) va- - e eae- - e naaeae oaasao ~aesoae Rs- - aa 9- oama zj = Soa Foe a2 s.24 494 248 1 63 1077 asa saa c= o Z2 a 35 Type B m 1 0 n e 0018 Rdled - 3 5 a~ • 5 30a 3 18 209 838 300 539 S- 0030 SQ BD(} 2.24 1 47 1429 Goo 524 45 9w 1 77 1 1B 1241 900 341 d- G 9 Ai Tf 2D 12DD 1 45 096 1302 1200 102 • ~ 24' 15m 1 21 078 1325 7504 -575 A R 0 Tc tc [4ital ! ❑c 30 18Ud 1 04 9,ea 1343 1Ba0 -457 a=a - a¢_ - aa- aa e=mvao - - =aam oa- - - - aa-. ` 35 21DO ❑91 060 1355 2300 -745 058 0.07 183 531 824 246 1.83 40 24DC7 082 054 1382 2400 -1018 ~ 45 2700 ❑ 74 0 dB 1383 2700 -1367 f7p5ak far CaaB 3= 163 ctE a~.~,✓ ~ so 8004 Q BS 0,45 1414 300D -9595 .t 56 3300 6 BW 0 42 1457 3700 -1843 l$p 3epp 0 Si 040 1508 3600 -2099 CASE 2 65 3900 060 4.35 1602 39W -2208 70 4200 OSB 638 1863 4200 -2537 C a se 2 assumes a T irne o T C[ncenV a U[un less Ua r y 5 m inu ies so tl ia t t he 75 4500 056 0.37 1718 4 5 0 0 - 2 7 8 4 peakRow =90 (318)(imp Area)m 119 cTa 80 4000 053 035 1728 4800 -3072 85 5100 052 034 4 7@Fy 5100 3302 go 5400 0.50 033 3827 5400 -3573 So, tha Peak fl aw 1a the 8asin is the greater tsi ttte two flows, 95 5700 0 48 0.32 18$7 57f~ ti4'813 Ei 1.63 crs 100 60DO 048 0.32 1943 6000 -4057 2% F • rF `r\i: ~?n { ~;1 ' D17WIdkGE P~L3kD GIILCIJLRTIDItilS ~ ~F~~ < Ftequired '~8' S[a~age dolums Imperwcws Area ■ 5 in 112 inlft 757 eu fC 208' Storage Vdume Pravided cu ft ~ E ' •Y~ ~ pAYWELL REQEJIREMEN7S - 10 YEAR iDESIGN STdRM A4aximum Stcrage Rec{uired by Bovstr{ng 5$2 cu Tt Numher and Type ef Qrymells Required 0 5ingle [louhEe INLANO PYlCIFIC EldGih3EERIWC+ BOWSTRINC3 hM1ETF{OD PRD.lECT SheJley La![e - Phass I PEAK FLOW CALCLILATfaM17 PRQJECT Shelley Leke • Phase I ~ OETENTIQN &45[k 6ESIGN $A51N B(1) a,asiN' B(l) ❑EsiGNER 7Aw Tot Aren 2 2$ Rcres FF~` f}ATE 11 f3[1/95 Irnp. Area 22235 8F ~F Ca 029 ~ • ~=?s Timefncrement(min) 5 CASE 7 • Time of Cmo. (min) 590 aAQaa $S' Dumc~w(cia) 1 m 130 n. erieda,d Row , Design Year Flcrsa 10 Arsn (ncrBS) 2.221 Ct ~ 015 • lmpern-s Area (aG ft) 22235 L - 130 ft. 'C' Factcr ❑ 2843 '208' VdumsRravided n a 4.40 5 - 0070 Area"C 0654 Te = 9.57 min., 4y Equatlar 3-2 0} Cwidelines Tms Time Inc Intens iQ []evel Vd In Vd DuS 5torage 270 n t3uner now (mon) (sec' (Inihr) (cfa) (cu tt' (cu ft) (ru n) i Z1 - 5C1a ForZ2 ao. 5ff0 oaa 354 . Ag 292 . p. 1.91 4 90B 354 552 tA~ Z2 - 4 "Fyge B - 1.0 n A 0018 Rdled - 3 5 5 300 318 208 838 3UO 536 5= ❑[]10 10 RCIp 2$4 148 1 Q55 60o 455 ~15 DM 9 77 1 19 1180 OOD 280 ~ d a 0.1 90 h, 20 1200 1 45 o95 1251 1200 51 25 1507 5.21 6,79 9282 1500 -218 A R Q Tc Tc toffii I Qc 30 1800 1 G4 068 9 305 1800 -485 aoQg$~ ooavom - meooa - rea-aa osoama a4- ga= =RR=a 35 2700 0,91 059 1321 2100 -779 092 ❑ 0S 1 77 733 590 292 1 91 ~ 40 24~ 002 O.54 9351 24~ -1048 ~a~~ a5 2700 0.74 048 1364 2707 -1336 ppeetk fa Case 4~ i 91 cfa 50 3004 0.68 044 1387 3004 -1813 ' 55 396a 0 64 0 42 1431 3300 -1859 •~~•'>r 6o 36Rp 081 040 1483 3600 -2417 CAuE 2 ~y 4~• 65 3900 060 0.39 1 S37 39M -23a3 o d. a a a~ 70 4200 0,58 13 3B 1839 42~ -2582 Cnse 2 assumes d Time q} Cancentratlon Iess tltan 5 minu[es sa Vua[ the ~ 75 9500 O.56 4.37 1691 4" -2808 Peak flow _90 (s 18) (Imp. Area) _ 1 ae ars ~ sa nsan 053 035 1705 asm a095 ss 5100 052 0.34 sna 5100 -3326 90 SdgES 050 ❑ 33 1004 54OO -3596 $o, [ha Poak flcw far ihe 8aain fa the grad[ar Df tha tvva Tiows. 85 5700 049 032 1984 5700 -38.3$ 1.81 100 8{Ipp 0.48 031 1920 6000 -40$0 ~ 20B' pRA9HAGE FOND GRLCtILAtIONS Fiaquirei '208' Stwage Volums ~ . ImpaMeua ArQa x 5 fn ] 52 inlit 928 v`u ft 2CSB' Stcrags VNume ProviCeS cu ff ~ ~~v•DRYWELL REOUlREINENTS - 1a YEAF1 D E9fGN 5YORM hAaaamurtz 5tcxage Fiequired hy Bouvafing 552 eu ft gz~: k`;•'/•~ Nvmber and Type af Drywefls ReqWred 0 Singla 2+'~'..;~~.n'✓.G'1. I Qf%1bl9 INLAAlL7 PAGIFIC EhIGINEERING BOYdS7A1NC3 MEZFiOD PROJEC3 Shelley La1se - Phsse I PEA1f FLOW CALClJL4TION RROJECT, ShelPay Lafte - Phnse I i`~; DETENTlOP+9 8A51N 4ESIGiJ BASIN, 9(2) ~ &ASIN 8(2) DESIGNER TRW 3ot Area 2.07 Acrea DATE 11 /3Ci195 ~ Imp, Arex 17305 SF C ?FK ~ Time Increm~st {min} 5 CASE 1 , i' Time of Cans. (mm) 636 a=a==d= ~ Out(lewv (cfa) 1 tCt fs. fDraiiend Flaw Desflgn Year Arnw rp ~ ' Area (acres) 2.065 Ct = 4 15 r ImperviGl.ls P1rea (sq ft) 17305 L a 10 ft. 'C' Factcr 0.2943 n- 0 40 '238' VoEume Rrvo~nded FD q 5= 0,020 Aras • C 0608 Te 1 11 min, hy Equs1ion 3-2 of Cilld'elIne9 Tme dime Inc. Intena 0 Devel Vd En Vd flut Storage 60D n. Gatter ftcyw (m3n) (sec) {irUhr) (cts) (cu ft) fcu n) {cu fc] aa- - o.a - - - amm - am:vs am- - e- soa- - Qa - at ~ 5tio Fo.zs sss 381 2e0 i ya e71 ~ ¢ 1 490 cnd Za ffi 1 rype 8- 1 a ~.~<<;~: n - 0018 Rdisa a3,s s 300 3.18 193 300 ary s= 0.010 10 sDO 224 1 3e 993 soo 393 15 ~ 1.77 1.i08 1108 900 208 Q a 0187 St > 20 1200 4 45 4 1172 1=0 -28 < 25 1500 S 21 4 1198 1500 -302 R R a Tc Ta tofel I Qc 30 1900 1104 Q&'i 1$20 18f]0 S80 . . g. a. . ao. . . . 4. a. A. . . . . se . ¢~oa= as 2100 os, 055 1233 2100 -867 . 069 0.09 1 70 s aa 6.36 280 1.70 aa 2400 ❑ so 1261 2400 -i ia9 45 2700 74 0 45 1273 2700 -3 A27 C]peak Tor Case 1= 1 76 cfs 50 30W 065 041 1283 3000 -1747 55 084 039 1334 3300 -1868 fiU 061 037 1363 86D6 -22] 7 cnsE 2 65 3900 e00 038 1469 3900 -anas _ - - - - - = 4200 0 56 035 1528 4200 -2674 Case 2 assumea n Tima aT Ganeentretion less thtiS 5 mfnutes so Mnt the 450v 6 58 034 1576 4506 -2924 r e•`` pea3s flrnv = 9(1(3.18)(?mp Araay ~ 9 16 cTa SCt 480a 053 032 iSBdB 480Q -3212 65 5900 052 032 9653 5100 ti9447 84 5400 0.50 030 1680 5400 -3720 Sa, tlhe Reak Slawr }or Vhe Sasin is Cie greater, of the [wd flows, 95 5700 049 0 30 1736 57W 9964 1 70 crs 100 6000 048 029 1788 6000 -421x 208' ORAEM1fAQE POfdD CALCVJLATEONS Requfrsd '208' Storage Vaume 4 Imper+rioas Area x.5 in 112 rnl#t 721 cu t[ 208' SIomgQ Y[iums Provided cu ft ❑AYVdEI,$. REQUIREN(EHTS - 10 YEAA [7ESIGM STORRA Madmurn Staage Required by Bowstring 490 cu Pt z~,~>.•>~-,~~ # Mumher and i'ypa ot E7rywells Requlred B Single Oaubla INLAND PAC[FIC E7+lGiTlEERIPdS' ~ •~'F'~i'FF~'~•~ aowsTRINa METwv❑ PRoJECZ• sr~~ley Lase - pr,esa i PEAK FLOW CALCULATION PRQ.IECT Shelley La}te - Phese I f~OETENTIC7N BA3IN DESIGN SA511~f' G BASiN G ~4! ~ dESIGNER, TRW •=ay:+~'- Tot Area 0 97 Aeres pATE 11 /30(85 Imp. Arsa 15145 SF C= 039 a•. Trme Incrernent (min) 5 CRSE 1 Time of Conc (mfn) B 88 a a Q a o t7uiflcsw (cTs) 0.3 40 fC Overland Fla4v Deslgn Yesr Row 10 ,Area (sefes) 0 974 Ct a o15 ~ Irripervfaua Afea (aq 1t) 13145 L g 40 ft z'C' Facia 03825 n= 4 50 '1 '2Q8' tifdume Pra+Aded Arsa ' C 0373 S o 0020 Tc R 469 mEn , by Equahon 32 0} Guidelines Time T9me Inc Intens. ❑ C7evel, Vd fn Vd Out Stmnge sao tt. Gutter How (min) [sec) (Inlhr] (cts) (eu tt) {au n] dcu tt] ~ oaao~ avaaa. as_- QO oa- o- - - - - aso= oaa~~a a~~a~a 21 = 50.0 For Z2 ~ 686 411 2.71 1 01 558 123 432 Z2a 35 Typ96- 10 n= 0 018 Rdled s 3 5 5 300 318 1.18 479 90 388 $a 002,7 10 600 224 083 617 18I1 437 c~n 15 90f1 1 77 066 888 270 416 d a 0125 n 20 12013 1 45 054 724 360 364 25 1500 1.21 5745 735 4S0 289 ~¢p • Yl R Q YC Ts tatel I OC 30 S8Dt5 1 04 ❑ 3& 752 540 212 - e- - ea aaoaoo a¢a- =o v- - oaa abo- oe - - - = aQaas 35 2100 I791 034 759 830 929 0 42 006 101 430 6 88 2 75 101 ,•x,. 40 2400 0.82 031 778 720 56 45 2700 1] 74 0 28 783 89 d -27 C]penk for Cese 1= 101 cfs 50 3M 13 88 D 25 795 900 -105 55 3300 064 9 24 820 ow -170 w 36DO 061 0 23 850 9060 •23E1 CqSE g 65 99p 0 6(1 022 803 1170 -287 3 70 42DO 0 58 0 22 G38 I 2BQ -322 Case 2 ansumes a 7tms af Csx~cerstreti~ less than 5 minutes so ~et the °•x 75 4500 9 56 021 ~ 3~ ~BP x peetsc ttorr ~90(3 18) {imp Aree) ~ ❑ es eTs sEr 4800 053 020 975 1440 -465 v> ? ~ 85 5100 0.52 019 1015 15w -515 e0 54DO ❑ 50 0,18 1032 1620 -588 ~ 50, the Peek flow IQr th e Basin ia th e greater a1 Gse twaRQws. 95 5700 0 48 018 1066 1710 .644 S OS c Ra in0 BDOO 048 018 1098 18M •702 ~ j 208' QRAI NAGE Ft7Np CALCIJLATIQh78 , Reyyufrei '2D9' 9torege Vdurtte ~ = Impervious Ares x 5 in 1 12 cn/1t S48 cu ft -><<-20' $icrags Vdume ProvEdod cu ft ~~y J N pRYWELL REQIJIREMEh1T5 - 10 YEAFi QESIGN 5TORM Mawmurn Starape Required by Bowatrmg 437 cu ft Nurn6er end Type of Drywdls Reaauired 1 Single 0 ❑wble INLHPfCI PACiFIC EWaNdEERING BOWSTRINQ MEYFi[7D PROJECT Shellay Lafss - Qhaae p PEAFQ FLDW CALGL1LATtf}N PRO.lECT Shdley Lake - Phasa I DEZENTIOFd 6A5[hE DESiGN @ASIN ❑ ELASIN, p DESIC3NER TRW Tqt. Aree 4.10 Acraa DA7E 11 /3pM [mp Area 90550 SF Cm 028 'nme Increnent (min) 5 CRSE1 T3me oi Conc (min) 800 Ou4flaw (cfs) S 40 R Qverlsnd Flowr :[]"gn Year Flow 10 `~•t's` f,'.~~ ' ` Arss (aares) 4.0gS Ct ~ 015 ~ Impamc~aa Area (aq ft) 9~ L, _ ~ ft / . 'C' Factor 02784 n a 040 208°Vdume Provided S= 0029 Araa ` C i 140 rc = 258 m,n, hy epuaban 5-2 of t3ul defirseg Tima Tims Inc Intens ❑ Devel Vd In Val Out Stomge 720 R, Gutter fiaw (m[n] (aee) (inlhr] (cts) {cu ft} {cu ft} [cu if) ~ h~. aaon- an- a- a - - - o-a ~an. da sa. oa. a . . sd.m oa~o~a T1 ~ 50 ~0 ~w ~2 e.~ 9Hp 2.89 8.36 1690 ~cY 1230 Z2 - 35 Type B- 10 n= 0.016 RdI ed = 3 5 ~5 300 318 363 1456 3DO 1 1 SFs 5= 0033 i~; ~10 ~ 2 24 2 55 1845 ~ 1245 C=~ 15 84E] 1 77 2 02 2063 800 1163 d = 0188 I`R. 2D 420D 1 45 3 85 2188 12DO 9fl8 r 25 1500 1 25 1 98 2239 150D 738 A R ❑ Tc Tc tofak I UC V. 36 1800 104 l 19 2280 1800 494 ~ 35 2107 083 1[S4 '~308 2S~ 208 ` 0 B5 a a n iY ~9 3 30 a a 3.+14 R B~ ~ a A 2 89 e~ a 3 30 46 2400 082 094 2359 2400 -41 45 2700 074 0.84 2382 2700 -358 Fr, n ~ Opealc ror c.asQ 1= 330 crs 54 3000 068 0.78 2421 3000 S79 ss 3300 0,64 073 aasa 3300 -saa so a$DO 061 0.70 asss 36fl0 -165 9 GASE 2 65 9900 0.60 0.68 2752 3900 -11+18 a s g a e : - 70 4200 068 086 2859 4200 -1341 Case 2 nssumas a Tima G} C[N1centratlbrs less theur 5 minu [as so tl'lat'71e 75 4500 656 064 2852 45fid -1548 paak flonr o.80(3 18) (Imp. Aras) s 2 01 ePs I,~ 80 ~60 053 0.~ 2975 480a -1825 k^`" s~~`• 85 5100 052 O59 3697 5100 -20L33 L 90 5440 450 0.57 3449 5400 -2251 So, The Pan1[ flcrw lor the Baain is th 8 0ranfer of 4he hao flowa, 95 5700 4 49 0 55 3253 5704 -2447 3 30 cis 100 6000 0 48 0 55 3351 BOC50 -2648 •w,• . ~ . ;~'.~`i•=\;~<~ ~r 208' QRAIP+lAC3E PQNO CALCL1lATEOfVS Rsqulted 1208' Storage Vdums C- ImAerrious qrea x 5 In 112 InJ~t 1273 cu R ~ ~J``~ ~ 208' Stsxage Vdurne Premded' cu ►t ORYWELL FtEQIIIREMEAlTS - 10 YEAR DESRGM STOAM ~ Maximum Storage ReGuired by 9owstring 1245 cu ft ~ Number and Typa of Clrywells Req u[red 0 Single 1 Deuble I14IAEdC7 PACIFIC ENGINEEFl1M1Fr3 80YdSTRINC3 METFiOO PR0.IECT, Shallay laka - Phsse E pEAt[ FLOW CALCt1LRTIQh{ PRfl.IECT' Shelfey Lslte - Rhase I ~ QETENTIDtU BA31N 6ESIGN BASIN E BASIN E pE$IGNER TRW Tot, Area {Y 72 Acees DATE 17l30/95 Imp o4rea B5g5 SF ~ C - 0 3'V Time Increment (min) 5 CASE t Tims [d Crxic [fnfn] 602 Cutflcw (Cfe) 03 49 t4. Ovesland Flaw Oesign Year F3ov I❑ Aren (atres) 0715 Ct = 0.65 Impeviaus Area (aq R) 8585 L- 40 R 'C' Factm 0.3ffB n a 040 '208' Vdume Pr6Aded s- 0020 Area • c ❑ azo ~ Tc ~ 2.5e min., by EquaUon 3-2 0} 4uidelines ' Tlme 7ime Inc Intens D aevel Yd fn Vd Out Slomge 350 n. Guner flaw (mrn) (aec) (in1ho (cfs) (cu n) (ev ft} [cu n} ~ eavae mam- vo maaaea mmamee aesae- e ae- - aa osaee~ zti a 500 FaZa ~ e.02 sar 2.89 0.64 308 tffa 199 Yaa as TyPeg=1 v n- 0018 RelEsd- 35 5 30D 318 070 292 go 192 0.014 ~10 6m 224 049 357 160 177 15 goo 1 7i 0 39 399 270 129 d- 0.120 R. 20 1200 1 45 0 32 422 36D 62 ~ 25 1500 1 21 027 932 450 •1 B A R G7 TG Tc tofnl i Oa 30 1800 1 G4 ❑ 23 440 540 -100 oaa- oa - ars- a- so.a~_m ~~aa~~ ~oa~F.m ~a~a~m Qaa~sa . 35 2100 Oat 020 445 630 _185 9 39 ❑ OB 0 85 3.48 9.02 209 054 40 2400 ❑ 82 018 456 72Q -264 vx~ ` 45 2700 ❑ 74 016 460 810 -354 Qpeak Ta Caae S= 0.64 cis 5D 30DO 068 0 95 988 900 -432 55 3900 ❑ 64 0.14 482 99D -508 ....J 8(T 3600 ❑ 61 013 5oo 1080 -580 CASE a 85 3500 ❑ 50 013 532 1170 -638 - - a a a x 7fl 4200 058 013 552 1260 -705 Case 2 assumes a Tims cA Goncentreflon less Uhan 5 rts[nutas sa ttuu ttre ~ 75 45[b ose 012 570 1350 -780 paxk flaw a90(3 18) (Imp Ilrsa) _ 0 43 cIs ` 8tl 480(} 0.53 012 575 1440 .985 85 5100 ❑52 O11 598 1531] •932 90 5400 ❑ 50 0 11 608 182[} -1412 Sa, the Pesk Bcm lor tlhe easin is the gresfes of ths twa nows. 95 570Q ❑ 49 ❑ 11 62$ 1710 -1082 0 4'ap CS& 1OU fiIX30 ❑ 4E Q 11 647 18X -1153 3 F ~ 208' 0Fi~4fIdAGE PQND CALCLlLATIDNS 'z~~~'~,'"`-„•% ~ Requ9red'2fl8' 6twnge Vaiume 3 - Impervirws Arsa x 5 in 112 lnfft 274 cu S4 208' Stom$e volume ProA ded eu tt ~ ❑RYWELL REQUIREMEMTiS - 10 YE4R DESf.P'aN STORM ~ Mawrnum Stcxage Requfref 6y 6owstring 199 cu !3 Num6er snd Type of prywells Requcrecl 1$ingle ~?a++ 0 Doublg IIkLAND PACfF1C EIdGfNEERI1dG 'ru.~`BOWSTRINO METHOD PROJECT Shelley Lake • Phase I PEAK FLOW CALCULATION PROJECT' Shelley Lake - Phase I DETENTION BASIN DESICiN BASIN: F BASIN: F ' ;r DESIONEA TRW Tot. Area 1.27 Acres OATE: 11/30/95 Imp. Aree 7030 SF • C = 0.25 v3> Ttme Inaenent (min) 5 CASE 1 4 Time of Conc. (mfn) 7.22 r y OUMIow(Cf8) 1 0100 ft. OveAend Flow ;i•i'~'~``?% ,r Design Yeer Flow 10 3o- K Area (aCtea) 1 285 Ct . 0.15 Impervioua Wee (aq k) 7030 L- 100 fL w 'C' Facta 0.2457 n= 0 40 `•208' Vdume Provtded 3. 0.035 F'~~ ~r Aree • C 0311 t F ~~ti Tc = 3 75 min., by Equatlon 32 of Guidelines Time Time Inc. Intens. 0 Devel. Vol In Vd.Out Storage 370 ft. Gutter flaw sv.n^^~~tt (min) (sec) (Inlhr) (cfa) (eu R) (cu ft) (cu tt) .mm- ooo- - - m y;s~;yk ,s - vo eeem- . m- - eeee a. mo. m aemeen zi - 50.0 F« zz s;,,:~;Fv':~„~• 722 433 2.64 0.62 an aas aa Z2 e 3.5 Type B- 1 0 :44:fF4~•~ jn4i~f~ v'$~ p4 n- 0.016 aaied - s s s 300 3.1e 0.99 397 300 97 S~ 0.014 10 800 2.24 0.70 520 600 -80 r~ •n u~~ 15 900 1.77 0 55 576 900 -324 d~ 0.130 ft. 20 1200 1 45 0 45 607 1200 -593 25 1500 1.21 0.38 820 1500 4860 A R O Tc Te total I Oc 30 1800 1.04 0.32 829 1800 -1171 s- eeaa - ee- - - - v- ena ss- e- - e- - - - - a- - eav . ve. as35 2100 0.91 0.28 836 2100 -1484 0 45 0 08 0.80 3.47 7.22 2.84 0 82 40 2400 0.82 0.25 849 2400 •1751 ~x;~''r, ~~,•t 45 2700 0.74 0.23 855 2700 -2045 Qpeak fa CeaO 1~ 0.82 Cf9 50 3000 0.68 0 21 885 3000 -2335 Fi•x,> 55 3300 0.64 0.20 886 3300 -2814 60 3600 0.61 0.19 710 3600 -2890 CASE 2 65 3900 0.60 0.19 755 3900 -3145 y}~v;' y~; 70 4200 0.58 0.19 784 4200 -3418 Case 2 assumes e Time o! Coneentrauon less thnn 5 minutes so that the 75 4500 0 56 0.17 809 4500 -3691 peek flow o.90(3.18)(Imp Area) = 0 48 cfs 80 4800 0.53 016 815 4800 -3985 85 5100 052 0.16 848 5100 -4252 90 5400 0.50 0 18 882 5400 -4538 So, the Penk Ifow fa the Basin is the grenter ot the Mro flows, 85 5700 0.49 0.15 891 5700 -4809 0.82 cfs ~,a~~'~ ~aS • 100 8000 0.48 0.15 917 6000 -5083 +c,; 208' DRAINAGE POND CALCULATIONS ~a*fn~ r,f,tA,?;v h Required '208' Storage Vdume Impervfous Arae z.5 in / 12 m/Tt 293 cu h t 208' Storage Vdume Provided cu ft ~ DRYWELL REOUIREMENTS - 10 YEAR DESIGN STORM t¢*r Mawmum Staage Requtred by Bowstring 87 cu ft Number and Type o1 Drywells Requlred 0 Single ~ t Double INLAND PACIFIC ENGINEERING BaWSTRIMG METHaQ PFlaIfECT, Shellsy Lake - Phaae 1 PEAK fLf7YN CAtCiFIATION AROelECT Shelley Leke - Phasa I pETENTIO~I BASIN F7ESIGN Bd4$IN, EF 6ASiN EF % DESIC3hfER PRW rot. Area 1.98 Acraa ~ oATE . 11130/95 Imp. Area 13565 SF C ~ 027 Time lnevemeni (min) S Ce43E 1 Time of Cmc. (min) 6.73 d ~%`~v`"~'r'3~ ===a== ~c.~~.^; Out(loar {eta} 1 100 ft. Oveland Florv l7esign Yser Flrna 16 tuea (neres) 1.98 Ct R 4.15 ImpWrsus Aron (sq ft) 13585 L a 10D fk t'C' Factor 4.2682 ~ ~r ',sv • rl a 0.+19 h~'; ~'208' VDILIfl1b'PfC1'Vidad 5. 0035 Area " C 0 631 Tc m 9 75 mEn., bp EquMan 32 oP Guid~d inea ~ E. Ttme Time dnc. Intens. O bsvd Vd In VoE Out Storage 370 tt. Gutter eow {min} (sec) on1" RCftl ft1 4~+ n9 tt1 mvoma - ems aa Z1 m 50.0 FarZ2 ~ 6,73 ~ dQG s 273 eoa 1 45 6o6aa784 na~ 9t34 ~~tl ~7 caa 22 = 35 Type 8- 1 Q ~ n- 0076 Fldled = 8 5 5 300 318 1 59 679 300 378 3. 0014 10 609 2 24 9.19 977 600 277 15 gm 1 77 094 975 9m 75 d 4 0163 ft 20 9200 1 45 0 77 1030 1200 -170 25 15w 121 6.B4 1052 150D -448 A FI Q Tc Tc trrtsl I qc 30 18M 1 44 ❑ 55 1074 1800 -730 sa~- - g n- p$- a - a- a- afl~~a~ ~~a~aa aa~~aa aa=~n 35 2100 OBS 0 48 5481 250D -1019 071 0.08 1 47 2 SS 9 73 273 1 45 40 2400 002 0.64 4105 240Q -1295 45 2700 0 74 039 1115 2700 -1 S@.S Qpea#C fpr CaSg f= 145 C[s 5f3 3000 4 88 0 38 1139 3f1Up -1 8$7 ss 3300 064 034 1168 3300 -a i3a 60 3600 061 0 32 1211 3600 -734.9 CASE 2 65 390Q 060 0.32 12aS 3900 -2814 =aa=~=p 70 4200 058 031 9339 42Cb •20ed ~f..: GasB 2 a"umes a Time of Concentmtiai less tltan 5 mfnu4es sa th+it tFss 75 4500 0 66 030 1379 45410 -3121 peac Row _90(3 18)(Imp Area) = o as crs aa neM 053 028 1390 4800 441❑ ' &5 5100 052 0.28 1446 5100 .3854 90 5400 0 59 0 27 1470 6400 -38= So. the Peala Flow Rar th9 Bssln Es the greeter at the tMro fl avrs, e5 5700 0 49 025 1519 5300 a41$1 1 45 cfa 100 6000 048 025 1584 BDOn a1438 L a ~ 208' DRA9NAGE POMD CALiCIJLATIOPV3 ~ h Rsquired'2fl8' Stwage Vdume ~g~ T? Impar+rkoas Aree x 5 ln 112 inM 565 cu ft ~ j~ 2D$' S4Drtlg B VdLIlI1B PFO+IfdBd Cu Ti • C]FlYWELL RECJl11qEAAENTS - 10 YEAR DES{Gh! STORM Memmum Stwege Regu[red 6y $cswstnng 380 eu R Numher end Tyge cyf Oryrwel [s Required G Single I ooc,bie IMiAMO PACIFfC ENOIFIEERItir3 E~~;~%;"-✓~..,~, BOWSTRINa METHOD PFiQ1ECT: Shelley Leke- Phase I PEAK FLOW CALCUlAl10N PROJECT: Shelley Lake - Phese 1 DETENTION BASIN DESIGN BA81N O BASIN: d DESIGNER: TRW Toi Aren 0.81 Acres DATE. 11/30/95 Imp Nen 9815 SF r~} J~ C = 0.35 Time Inerement (min) 5 ~k.a~t k~r• CASE 1 Time o! Conc (min) 5.00 ;,x.,M1,' ~ °°°=°=m •%for,;, ' Outflow(efe) 0.3 50 ft. Overland Flow Design Yeer Row 10 Aren (acres) 0 811 Ct e 0.15 Impervious Area (sq ft) 8815 L ° 50 n. ~Vfi 'C' Fnctor 0.3542 7+'~ `f • -rwk Fa n- 0.40 '208' Vdume Promded ~t S e 0.050 Aree • C 0.287 Te a 2.22 min, by Equation 32 of Guidelines Time Time Inc. Intens. 0 Oevel. Vd.ln Vd.Out Stange , . . 250 tt. c3utter eow (min) (sec) (in/hr) (cta) (cu ft) (cu R) (cu tt) ee~~aa . e. . o. so. . m. e- oe . emm. so v. . . . . mo. . ee Z1 m 50.0 For Z2 a"~{ 5 00 300 3.18 0.91 387 80 277 22 = 3.5 Type B v 1 0 ~`{u n- 0.016 Rdled ~ 3 5 5 300 3.18 0 91 367 90 277 m S- 0064 x:: c,.,. 10 600 2.24 0 84 452 180 272 ;fi..':', ' 15 900 1.77 0.51 509 270 239 Qvv ry SK~fi' a- 0.103 n zo 1200 1.45 0.42 542 360 182 25 1500 1.21 0.35 557 450 107 A R Q Tc Te totN I ac ~ 30 1800 1.04 0 30 588 540 28 v v - = . . a=s. . . . . -a=. . . . . . m . . am-. -m. . . .:~:;r~~. ss 2100 0.91 0.28 576 eao sa 0.28 0 05 0.92 1 28 5.00 3.18 0.81 40 2400 0.82 0.24 589 720 -131 45 2700 0.74 0 21 598 810 -214 Qpeek for Ceae 1= 0.91 Cis 50 3000 0.88 0 20 608 900 -294 55 9300 0 64 0.18 825 890 -385 60 3600 0.61 0 18 849 1080 -431 CASE 2 65 3900 0.60 0.17 690 1170 -480 ° ° m ° ~ ° • ~ ~ 70 4200 0 58 017 717 1260 -543 Cnae 2 assumea n Time ot Concentratlon less than 5 minutes so thet the ~.,~y.~~ 75 4500 0 56 0.18 740 7350 -610 peak flow e.90(3.18)(Imp. fVee) ~ 0.83 cfs 80 4800 0.53 0 15 748 1440 -694 85 5100 0 52 0.15 777 1530 •753 90 5400 0.50 0.14 790 1820 -830 So, the Peek flow for the 8asin (s the greeter ot the two flaws, 85 5700 0.49 0.14 817 1710 -893 0 91 cta 100 6000 0.48 0 14 841 t 800 -959 Z 208' DRAINACiE POND CALCULATIONS Required '208' Stornge Vdume Impervious Area x.5 in / 12 in/ft 401 cu ft o: 208' Staage Vdume Provided cu fl •r} kt, ~CRv f f DRYWELI fiEQU1REMENTS - 10 YEAR DESIGN STORM Mawmum Storege Required by Bowstnng 277 cu ft Number and Type of Drywella Required 1 Single ;~o~.«~k{•~-x~ 0 Double INLAND PACIFIC ENGINEERINCi BCIWSTRINO METHOO PRd.lEC7' Shel ley Lake - Phase I PE41C FLi3W CALGULATIDN PROJECT Sheifey l.ehg - Rhase I DE3ENPION BAS1N DE$IC3N BASfN' H 6ASIIM H ❑ESIGNER 7RW Tat. Area Q BS Asres (]ATE 1 S MI95 Imp Area BBBS SF c . 033 Time Incrsmeni {mm) 5 CASE S Time of Conc. (mfn) 5oo aumow {cTa} 03 SQ tt f}verfend Flarr ❑esign Year FCaw 10 ,i•,x. APax (aCrw) 0647 Ct a 0.15 ' 9mpemoua Area (eq R) 688e L= SQ ft. 'G° Fsct[x 03334 n- 040 '208' YoPume Pravided 8 s i].QSQ R[ea •C 0219 Tc a 2.22 min, Gy Equatirin 3•2 oT Guidei lnea Time Time Ine. Intens 0 Davd. Vd In Vd,put Storeige 160 n. t3uner flow Y (rrsin) (sec) (Enmr) (cfs) (cu ft) (cu it) ft) , Z1 = SOA Fcnf ~2 ~ - 0 8[~1 - 's 9D0 - oP S 18 a- A OGS Q6a- a2i8 goog ~-ae 1d8 c~m Z2 s 35 Type 8= 10 n- 0.098 SiolEed - 35 fi 3IX} 318 068 239 90 186 c~o 5= 0015 10 500 2 24 0,48 339 180 1ss F' 15 9w 1 77 038 989 270 113 G= 0. 4 20 Tt. . . 20 4200 4 45 0 31 407 380 47 25 1500 121 6,28 418 450 }38 p R C7 TC TC tortal I i0c 30 180U 1 04 0 22 427 540 -1 i3 ~.a.ea~a oaaaaa o- aam- mr.av- e - - - e- - oa- F,ma, a¢q. . . 35 2100 091 e20 432 630 -198 0 39 UDS a B$ 1 52 5oo 310 069 40 2300 0 82 Q 18 443 720 -277 ~~7~ dS 2700 074 016 447 910 -363 Opeak tor Case 9 4 89 sts 50 3040 068 015 455 900 -445 95 3300 064 014 430 840 .520 BQ 3600 081 ❑ i 3 4$7 1080 -593 > . CASE 2 ~ 85 3900 060 013 518 1170 -652 ~'F 70 42tK] 0 S$ 413 538 1250 •722 C,ase 2 assumes a Time o1 ConCenCeoan legs than 5 minutea ao Ciat 1?se i: iS 4500 Q 5e 012 559 1350 -794 flow migo (3 18)(Imp Area) R 0.45 crg eo 4800 063 aii sea jaao _M as 5100 0 52 o i i Ssn 1530 -946 ~:s,• •~p',t. go 5400 060 all 593 jew -1027 sm, me Pae►c now ror the Beni n is ma greacer wth e two nows, as 57a 0.49 0111 si a 171 a -1097 oss cts 100 6000 0.43 0.10 632 1800 -1168 20a' 0 RRINkGF PC ND CALCl1LAtION5 RequlraQ °208' Staage Vdume = Impervrous Area x 5 in 112 rn/R 2$7 Cu R 208' Starage Vdume Provided c,+ Ft DFiYWELL REOUIREMEN75 - 10 YEAR 0 ESIGM STORM ; r Maxirnum Stoaga Raqulred by Bowstring 186 cu ft Plumher end Type ot Qrywells Required 1 Sfrtgie a []ouble IldLAWO PACIFIC EM1IGWEERING BQW57FiING ME'fFif3[? PRO.IECT Shelley Laka - Rhase I PEAK FLflW CALCl7LATIQIN RRO/ECT Shelley Letks- F'hsae I DETEMTION BRSIN DESSGN BASiN' I BasInr' i oEsIGnrER rRw Tot Aeea 0 B'V Aeres ~ [3ATE' 1 i P3Q19S Imp Area 2075E1 SF } c~ 074 Ymslncremen! (min) 5 CA3E 1 Ymeaf Conc (min) 887 t7utRow [cTa] 03 20 ft Ore4end Flwr aesign Yeer Row 10 IVea (scres) 0 ~s c! _ o1 s lmpenrlaus Area (sq n) 20750 L- 20 ft `i~; 'C' Factar 0 7375 n- 040 x`~ ~~{g '208' Vdum e Provided S m o 020 Arx • C 0448 7c = t 69 min , by Equa4cn 3-2 af Guldelines Tlme Time Ino. tn[ena O Qeve1 Vd In Vd,out Sivaga 700 R. Gutter firnv (min) f$ec1 iiMlho [ors] (cu tt) (cu tt) [cu ft] ; aavaaa e~aa~o aaa~ao aaoe~a aaoaava aed~~a o~aan~ ~ Z1 = 5€7 4 Foe I2 687 412 2 70 1,$1 669 124 545 $2 = 3 5 Type 8 P 1 0 n~ il.01 B Fldl 3.5 5 ~ 3.18 1 43 573 90 48~3 S R a02a 10 ODO 229 i FIU 743 1$l7 5m cmm 15 BDO 1.77 0,75 825 270 555 d a 0142 ft 20 1200 1 45 0 65 871 360 511 25 1500 1 21 0 54 89f} 450 Mid A R ❑ Tc Tc toffi1 I Oa 30 1000 1 04 047 DQ5 540 365 araada oeno.a ~Qeaao .asooao saoana sooa¢A .~=e.m 35 2400 081 041 914 830 2$4 0 54 007 1.22 518 8.87 2.70 121 ; 40 2900 0 82 0 97 53+1 720 214 ~ 45 2700 074 0.33 942 810 432 [lpgah lar £a.se 1~ 1 21 cia 50 36700 4 86 0 90 957 900 57 55 3900 0.64 0 29 B87 990 3 60 3wo os, v.27 1023 lvav -57 cnsE x ~ ss 3900 oSD 0,27 1087 1170 -83 70 42E10 Q5B 028 1129 1280 -131 GasB 2 aasumes a F[me a1 ConcenVa4vn less than 5 Ysiinutes sa t7nt thB 75 45(0 [},SB 0 25 f 195 1350 •185 peak flpW =90(3.1B) [Cmp. Aree] a 1 38 c}s : 80 4$M 0.53 0,24 1174 tAdG -288 jr - 85 5100 ❑ 52 0 23 1227 1530 -388 90 54DO 0.50 022 1242 1620 ,378 < So, Ihe Peek flaw }or the Basln ia tha grester of ihe twa flcwa, 95 5700 ❑ 49 ❑,P2 1283 1710 -427 136 Cf3 100 6= 0.48 022 1322 980o -478 208' []AAINAGE PONO CALiGIJLAPIONS Required '208' Stwsge Volume k = Irnpervious prea x 5 In 112 in]Ti 855 cu !t 208' Stwage Wdume Prauided cu 4t DAYWELL AEQUIREMEN7S - ta YEAFi aESIGN STOFIM hAsaumum SCorage Requlred hy BoivstrLng 583 cu ft Number and Type of Orywefls iiequireei 1 Smigle 0 Owble IIVLAWO PACiFIC Ehl.i'.ti[AIEERl1dt'a r BOWSTFUNt3 METHDQ PRCkIECT. Shelley Lalsa - Phisae I PEAK FLCSW iCqLCl1LATIqk PRCAIECT Shdley Lnke - Rhase I DEYENTIClN BAS[N 6ESIGH al31N, J BA81N DESIGNER' TRW TcYY. Arefi 0 14 Rcrea flATE. 11 f30l95 Imp. Pvea 2335 SF C = p.4A ~ Time Pncrernen! (mm) 5 CASE 1 ~......ri? Time oT Cmc (min) Soo a=~=a=m `~./~,G;•s, ~ CJtetll[n«r{eTs} 43 20 fY Oderland Flcm Dgsign Ymr Florr 10 • Rrea (acres) 0137 Gt = U 55 Impenfrus Arsa (sq R) 2335 L = 20 ft 'C' Faetor 09443 n= 040 '24S' Ydume Prwided 3- 0,020 Area' C 0061 7c = t 69 rnEn, 6y EqumtlQrt 3.2 ol Gufddirtea ~ 4 'Fima 7Ime 9ne [ntens 4 Ravel. 4d In Yd Out Starage 70 R. Gutter flow [rnEn] (sec) {m/hr} (cfa) (cu f) (cu ft] (cu n) ~ 5~.6 for Z~ oa 5.00 aw- 9a 3 1B a=o @ 19 - - - ma 78 - as- ~ opF,- -1P F1 coQ Za- 35 TypeB=9D n a 0.078 Ralled - 3 5 5 304 318 G 19 78 90 -12 5 d 0020 ` ~ 10 sm 8 24 4.14 9o 180 -84 S5 gm 1 77 O31 9C2H 274 -192 d- 0070 IC 20 1200 1 45 0.09 115 36D -245 25 15w 121 0.47 118 450 -332 A i; C] Tc Tc totaf f Qc 30 1800 104 008 12o 540 -420 = e aansda sffi= - - a m- oa- - a- no- - - - .RmA Qoeea 35 9100 099 ❑08 122 630 -508 013 003 0 18 0 93 6 00 3 18 p 19 +10 2400 0 82 0.05 125 720 -595 45 2700 0 74 005 128 810 -e44 Qpeelc for Gase 1= 0.18 c€e - _ 'SO 3000 0sB 004 128 go0 -772 55 3300 064 004 9 33 8m -857 .t so 36L10 061 0 04 137 1980 -843 CASE 2 ~ SS 3900 060 004 146 1170 -1424 - s== a- - 70 4200 058 404 152 1250 -1108 Casa 2 sssurnes e Tims of Cancentrabon IBSS thtsn 5[rtlnutea so ft3 ths 75 4500 ❑ SB 403 157 1350 -i 18.3 psak tlaw -.90(3 18) [imp. Naa) ~ 015 cls y~ SU 4800 053 003 15$ 1440 •ti aaa ~ 8S 5100 052 003 165 1530 -1385 go 54DO 050 0 09 197 1820 -1453 Ssa, the Peek flwr Por tlta Basin is the greater of the trro Noova, 95 5700 049 003 173 1710 -5537 0 19 eFs r~ ~ h 900 60IX7 0.48 003 178 i$((,~ -1622 $ 208' ORAINAC'sE PONO CALCUUITIOMS Roquired'208' Storage Vdums = IrT1perVfrus Area x 5 in / 12 inlft 97 Cv ft ~ 208' S[orege Vdttrne Prov[ded cu 1i DRYNlEL.L REDSJ[REPNEMTS - 1[Y YERR DE31GN STORM Maximum Fteraga Requlrad by Bowstnng -12 cu ft Number end Typs oP l]rywelfa Required T 5ingle 0 i7alble lNLAhfO PACIFIC EMGIHEEiR[NQ Bt3YYSTA1N13 METHab PROJECT. Sheilay Lake -Pha$e I PEAK FLOW CALCVJLATIaN PRD,IECT Shalley Lake- F'hase I DETENTIOM 6J151N mE51GN B131N' Ii Bfl$114 W DESIGNER. TAW Tot Am 0.75 Acras pATE' 11130I95 !mp Area 23085 3F C m 0 88 f~~- ~ll'Fr ~F';c xTlme Incremen! (min) 5 CABE 1 Tfine r,f Conc (min) 806 1 s==v~aa ^ ~ OLItt16W (cfs) 10 It. Dveiiend Flarv Daslgn Yeer Flrrar 10 Area (acres) 0745 Impm+rfacas Area (aq k) 93085 CS - 0 46 ~;~•"~C. L- 10 n. 'e' Fncfa ❑ fi337 n a 0.40 s, 20e' Ydume Provide! S= 0020 Aree • C a 509 Tc = 1.1 Y mlcs , 6y Equatfon 3-2 W OuiCelines `fime Tlme Inc. lntena 0 4evcl Vd In Vd out SS[rage 700 tt Gutter flow (mfn) [aec] (inlhrl (afa] (cu tt) [ou ft) [eu tt) c~saaa o4sa aeQeo- aod- .a - d- - na- ~amsae aaoaoa zI m 500 For za eOB 3e4 285 140 ai a aea 350 P2- 35 Typa9a9❑ n a 4018 Fldled a 35 6 300 3.18 1.92 051 300 351 0.020 E g10 fim 2 24 1 14 828 500 226 15 o0 1 77 090 923 gm 23 a- 0152 rL xo e200 145 074 978 12DD -aaz 96 3500 1.21 0 92 1001 1500, -99e p R Q Tc Tc totel I Oc 30 19m 1.04 ❑ 53 9019 180a -781 mr,o m g - a smooa- a- m- a a aa.. oosemo -o~~• 35 210D 0 Bt 048 1031 2100 -1os9 062 0.48 1 48 4 95 8OB 288 1.48 ~ 40 2400 0 82 0.42 1054 2E00 -1348 45 2700 0.74 0.36 9084 2700 -1639 apeeLis ror cnsa s a 148 cTs so 30DO 0.e8 o as 1082 3000 -ists 55 33DO 064 0 33 1 158 3300 -2184 so 3800 0 81 0 31 9 157 960G -2443 GASE 2 85 39f1a 060 031 1230 3900 -2670 eanacaa 70 4200 958 030 1277 4200 -2923 Cnae 2 ussumes n 7ime o! Cantentration lesa than 5 m9nuYes sa that The 75 4500 ❑59 029 5319 4500 -31 B1 p~ flow a sv(a 18) (imp. a.rea) ~ s 52 cts ~ eo aavo 0.53 027 1329 aeoo -aa71 ~ 85 5100 052 ❑2$ 1 383 5500 J719 90 5460 050 0 25 1407 5400 -3993 Sa, the PeaJS flor }or the Bosin Is the graater of tlie iwa flsrs, ' r,;~ 85 5700 049 Q.2S 1453 5340 -4247 1 52 cP8 1 QC1 6000 0 48 024 1497 6000 -4503 'r• ? Fk; . 2Q8' 6RqINAGE POKO CAICUUI'CIakS Raquired '208' Storege Vdume lmpeneld3s Rf'ea x 5 in 1 42 in1R 962 cu ft 'saa~: • 13 • 248' Si[xage Vrlume Prowderi cu ft DRYWELL FlEC7UIREMENTS - 10 YEAR CiESIi'iIV STOFIM Maximvm Statags Requfred by Bawstnng ssj cu ft E'• ~ Num4er end Type of Drywells FIoquired 0 Single 1 []cuble INLAND PACIF3C ENGINEERING " FfF BQWSTR[NG METHOp PRCIJEGT Shel ley 4.aka • Phase k PE7K FLt?W CALCL7LATIOAI PAa.JECT Shelley Lnke -Phase I DETENTI(7fV &451N DESlf3M BASIN K BA$IN K k DESIGIYER TFiW T~TcH. Rr9e 0 07 Acres 9A3E. i 1,130N5 Imp Area 2621 3F C ~ 0 61 Timelnorement (min) 5 ~ 3• a:.' CRSE1 ~~'''t'ir' • Time o1 Corsc. (mfn) 500 a.==..= u Outflrsw[ois] 0,3 i❑ !t Qverland Flow OesIgn Year Florp 10 ~ : - ~ • » ~ Aras (acres' 0068 Ct - 0 15 ImperWcus Area (sq ft) 2821 L R 10 ft. ''C'Factr,x 08125 n= 040 ~'2D8' Valums Protided 5 a 0 020 Area ' C 0055 n~3'ns3i~t~: 7c = 1.11 min, by Equstion 32 of Guidelines Tome Ttme Inc, Intens, 4 Qevet. Vd In Val puf Stoage roa tt Guner nonr (min) (see) (inlhr) (cfs) [cu n) {cu tt) [cu ft} Z1 g 5U.t1 Fa 22 `s fi.~ ~ 3.18 U.18 ~ 71 ~ ~4 ~-19 ~ Z2 = 3.5 Typa B a 10 n a 0016 Rdled Q 35 ~ 5 300 318 0 48 71 9D -18 [e= 5= 17 a55 10 BlC1 284 012 87 i 8D -93 95 908 i 77 0.10 98 270 -172 d- 0057 St 20 12DO 145 008 164 360 •256 25 1 SM 1.21 0.67 107 450 _W Y1 R O Se Te tortel I Gc 30 1000 104 e08 969 540 -Q5 a.m4ava. ea- ao- ov- mam maa- am - - a- - - vea- se- smaP 35 8109 081 005 111 830 -519 0o9 003 0 1 B 082 500 318 Q 16 I dU 2400 4 E2 005 115 720 -SD7 45 2700 ❑ 74 004 115 810 -085 OpOnk 16r CESe 1= ❑ 16 C!S 3000 06$ 0 D9 917 ow -783 55 3300 064 004 120 m -870 so 38)0 0 Bt 003 925 1 p8U -955 A ~ S~ q~ a BS 3~4 0.~ 00.3 933 1i7i7 -1037 ~ 70 aa[w 068 003 138 12e0 > a2 Gase 2 ps9umea a Time of Csaicentratian less than 5 minuies aa that the 75 4500 0 58 003 142 5 350 -9 2p9 pgsls now =.90(3,18) [Pmp. Arey) a 0.77 cTs $p 40()4 0.53 0 03 144 1440 -1289 i 85 5100 0 52 0 03 149 1530 -1381 go 5400 0 50 0 03 152 1820 -1 d88 Sn, tlfe Ps6k ftow for the Basln ia the grentar af the two flowa, 95 5700 0 43 003 157 1710 -1553 0 18 cfs 100 8000 0 48 0 03 182 1840 -1838 20e' aRniHaGe PQN d eALCU uATiaNs Aeyu,rea '20&'Storaga vduma Impemous AreEi n.5 in 112 inlit 109 cu R 208' Stcuega Vdume Promded eu ft QRYWELL REQllIREHtENTS - 10 YEAR pESIGN STf]RM Masimurn Storage Requ[red by eawstrmg -59 cu ft Mumber arsd Type af Orywella Required f Single ~>n i0 Double INLANO PYICIFIG ENGINEERINS'a BOYVuTRlNC3 hRE'TFiO❑ RROJECT' Shelley 18ke - Phase I PEA1t FLC7W CALiCUU17101d RRCkJECT ShWey LBke - Phasa { L'lE'fENTION BASIN DESICsM BA51N' L EIASIN L ~f~~;✓~ • DESIGMEPI. TRW Tat Rrea 0 07 ACfas DATE 11130195 V-4:) c' Y Imp Area 2621 SF +(A C= OBi : Time Increnent (mfn) 5 CRSE 1 , Time a! Cartc (tnin) 5oo Outflorr(efs) 0.9 30 ft. Over4arsd Flow Design Yeaa Flaw SD Are~a (acr~) 0068 GY - 0 15 ~ ImpavEaxs Area (sq ft) m1 L- 10 tt. •'C'Factor 0.8125 n= 040 '208' Vduma Prevldad S+3 0020 ~ Rres' C 0.055 F Te ~ v 11 min, Gy Equadon 3-2 [sf Guidelines r•~.,•„•: 7ime Time Inc Intens. ❑[7en+el. Yd.lrr Vd Ou4 Storage min) ($ec) (inlhr) (cfs) ccu nr (cu ti} (c 10p Tt, Gutter flrnw ( u ft) aao~4 ¢4~ooQ aa4~oo aqmaaa oaso- - a admmaa ma~maa ~ Z 1= 50.O Fcx Za 500 300 318 018 71 90 9 t=_ Z2 = 35 Type B 4 1 0 n= 0018 Rdle-da3.5 5 300 318 018 71 90 -59 co= 3~ 0 055 S❑ 80D 2.24 012 87 180 -93 1$ 8p0 t 77 010 6B 970 -172 d= 0057 fL 2Q 12DO 1 .45 0 DS 144 360 •258 25 15IXf 1.21 0.E17 107 450 .349 A R ❑ Te Te totw 1 4c 30 180U 504 006 109 540 -431 ¢~aqoe Qa--oa -m-a-a o--m-- 35 2100 0.91 0,05 111 639 •519 009 0 0.3 0.18 U.82 5.00 318 o t8 • 40 2400 082 005 113 720 -W7 N~~;•, 45 2700 0.74 0 04 115 Bi CI -mS r3paak for Gase 1~ 0,18 cls `x 58 30OU 0 68 004 117 DDO -783 SS 33w 0,64 O.04 120 990 -870 M;^k' 80 360a 061 0 03 125 1080 -BSS CASE 2 8s 390Q 050 003 133 1170 -1037 av- v=== 70 4200 0.59 003 138 1250 -1522 Case 2 assumes a Time ed Ce3ncentrahon tes9 than S minuiss so that tha 75 450a 056 0 03 142 1350 -1208 pEiRli flpw a.~[3.1&] (Imp Area) ~ 0 17 C18 80 4900 053 9 03 14~7 '144Q -i 2~ ia $5 5109 052 OW 149 1530 -1381 ~ so 5400 4 50 0 03 152 1820 -1 d58 Sa, [he P9ak 1low Sa ihB Be49rn is the greaier c} fhe twa Rovrrs, ~ 95 5700 0 49 003 157 1710 -1553 0 18 GIS iIX] 6wC1 088 003 162 1flw -1638 ana' aRniNaGe Powo eAtcuLArAONs ~ Requirsd '20B' StoraOa licWume Cmpermws Area x.5 In 112inJtt 109 cu f! s z 208` Stwage Vdume Pravided cu ff ~ D RW4fELL REOUfREMENTS - 10 YEAA 0 ESIGN STaWN H1&idmum StoragQ RequEred hy Elowsting -ie cu fi Numher and Typs o} Clryavdle Reryuired 1 5ingle 0 Double 1NLAN¢ PACIFIC EHGINEEfiiMG BOWSTFiING METHOD PRQIECT 3helleY Lake - Phase I PEAK FIOW CALCULATION PROJECT: Shelley Lnke - Phase I DETENTION BA31N DESIGN BASIN KL BASIN: KL DESIGNER: TRW Tot. Aree 0.14 Acres DATE: 11/30/95 Imp Area 5242 SF •f }r;,~fvn~ 1, J ~ C~ 0 81 w'F:>f%%s•i,~ ~ 11l 1'~ ~ ~ V Yta 1 V` ;~rsixM r•~,r Time Increment (min) 5 CASE 1 Time ot Cana (min) 5.00 Outflow(cfs) 03 10 ft. Overlend Flow ~f"'Deaign Yeer Flow 10 Aree (acres) 0.138 Ct v 0.15 y{~ Imperviws Aren (aq ft) 5242 L- 10 R ~ 'C' Fncta 0.8125 n- 0 40 '208' Vdume Provided S- 0.020 Aten • C 0.111 Tc ~ 1.11 min, by Equatlon 3-2 0} Guidelines Time Time Inc Intens. Q Devel. Vd In Vd.Out Staeee 100 tt. Gutter 8ow ~(min) (sec) (~n/hr1 (cfs) (cu R) (cu tt) (cu ft) 4a,{{~~~~{ v eveeev e~~vvv av~~~~ s~avvv ~avoave enaaaa s..emo Z1 = 50 0 For Z2 5 00 300 3.18 0.35 141 90 51 <=n Z2 = 3.5 Type B= 1.0 n- 0018 Rdlad = 3 5 5 300 3.18 0.35 141 80 51 <=o '.`~'.~,-•'r• • •r S- 0.055 10 600 2.24 0.25 174 180 -8 tC~°b.t<• :'`w. hX42ix` vf ~ 15 800 1.77 0.20 186 270 •74 d- 0.073 ft. 20 1200 1.45 0.18 209 360 -151 h~~+'v ' 25 1500 1.21 0.13 214 aso -zse AR - O=' s- Ts Tc total s_-- o v v Oc .-30 1800 1.04 0 11 218 540 ~21 35 2100 0.91 0.10 221 830 -409 01,11011" 0.14 0.04 0.34 0.69 5.00 O 3.18 0.35 - 40 2400 0.82 0.09 227 720 -493 45 2700 0.74 0.08 229 810 -581 Opeak fa Case 1= 0 35 Cf9 50 3000 0.88 0.08 233 900 -887 55 3300 0.84 0.07 241 990 -749 <v<k:. o 60 3600 0.81 0.07 250 1080 -830 CASE 2 BS 3900 0.60 0.07 265 1170 -905 e e- - - `un• 70 4200 0.58 006 278 1260 -884 Ceae 2 nasumes n Time ot ConcentraUon less than 5 minutes eo that the ~;.~k;;~,„;%~ 75 4500 0.58 0.08 285 1350 •1065 peak flow -.80(3.18)(Imp. Area) - 0.34 cfs 80 4800 0.63 0.08 287 1440 •t 153 85 5100 0.52 006 299 1530 -1231 P'rrt~,•`•^{! 90 5400 0.50 0.06 3D4 1820 -131e So, the Peek flow fa the Beain ia the prenter of the Mro flows, o, F; •Sn 85 6700 0.49 0.05 314 1710 -1398 0.35 cfs r f 100 6000 0.48 0.05 324 1800 -1478 ~S ~`~k { • 208' DHAINAGE POND CALWLATIONS ' Hequired '208' Storage Vdume Impervious Area x.5 in / 12 in/tt 218 cu ft M+ 208' Storege Vdume Prowded cu k . . : . •~y ?`.3> DRYWELL REQUIREMENTS - 10 YEAR DESIGN STORM Maximum Stora9e ReQuired bY Bovvstrin9 51 cu ft 4~ v O 1} v Number and Type of Drywells Requlred t Single 0 Oouble INLAND PACIFIC ENGINEERING EOWSTFINC'i NfE7!`iQ0 PROJECT, She!!8y Lalce - phase I FEAK FLC]W CALt:LfLAT10N F'fiOJECT Sheiley Lake - Phnsa 9 DETEN710N EIASIN 47ESfGN BASIN, M pASfN, AA DESlGNER TRW Tcrt Area 1 95 Acres s DAT'E 11 P3L1l85 Imp, Rrea 12583 5F ' iC = 0.26 Time Incremen! (min) 5 CASE 1 ~A Time Qf Conc, (mvr) 5.84 Oumow (cf s) I 140 It. ❑vei#and Flov f~ ,Fcy C7eslgn Yew Flcw 10 :t F~c... a. Area (ecres) 1947 a- Q s5 ImpeMous Aren (sa n) 12e63 L a ,aa n. 'c' Facc« o 2Wa n- 040 '208' Vduma Pramded S a 0080 ':r krBa * C O.S14 ~ . Tc + $ 58 mm , 6y Equatiors 3-2 Q! Guidelrrtes z• ~ TEma Time lnc Intens. ❑DeveG Vd In 4d Out Stcxage 256 tt. Gutter nmr (min) (ssc) {inRirJ (cfs) (cu n) (nu tt} (cu tt] ~ - a- a- - _m- osa Qaaa- o o¢o- - a Q-=-~~~ aQaoaa Z 1- 50 0 Fa Z2 m See 351 2,94 1 51 710 351 ~ 359 27 = 3 5 Type B= 9 0 n= 0018 Rollad=3 5 5 330 318 163 657 30D 357 3 g 0010 10 wo 224 1.15 $28 80a 228 $ 15 900 1 77 ❑@7 927 900 27 d s 0. s 75 ft ~ 20 12DO 1 45 074 W3 12tM7 -217 75 15m 1.21 082 1006 1500 -494 A A L7 Yc Te tatal I Qc y~~'~ 30 1800 1 b4 6.59 1025 1800 -775 : F;- n. . naa anaoaa a- - aa- - .r.- - vd ao- a- - v- - sa- - - « 35 2100 091 447 1637 $100 -1063 082 009 t 5O 2 27 5 86 2 Bd 1.51 40 2400 482 042 1os1 240D -1339 c 45 2700 074 038 1072 2700 -18244 Opealf tGr Ca8a 1~ 1 51 cSa 50 30C30 068 0 35 1090 3000 -1910 ss 3300 084 0.33 1124 33Da -ai 7e ? 60 3600 ❑ B1 0 31 1965 3600 -2435 CASE 2 65 34W ❑ 60 031 1238 3900 -2681 ===sa~~ 70 4200 058 0,30 1287 4290 -2813 Cese 2 esaumes a Trme oT Caicentrahcn lasa ihsn 5 mmutes eo that the 75 45a0 0 58 0 29 1329 4500 -3171 peak flaw -.80 (3.18) (Imp, Area) = 0 85 cfs SQ 4500 053 027 1339 4800 -m1 85 5100 0.52 027 1394 5100 -3706 go 5400 0.50 0.26 1417 5400 -39M So, the Peak flvw Tor the Basin is the greater of the iwa flvnss, ~ 95 5700 0.49 0 25 1465 5700 -4235 1 51 cfg 100 60M 0 48 025 5509 BO[10 -4491 • 20L9' QFiAIiVAGE POHO CALCUCATIf7MS ` Required'208' Storags Voluma ImpeMous Ptrea x5 in j 12 injR 538 cu ft x - 208' Storage Valume Provided cu ff ❑RYHIELL REOLJIREMEhlTS - 10 YEAFi pE3lC3N STOfl7N ~ FA&idmum 5torage Fiequir8c7 by 8orvatnng 359 cu R ~ Num4er and Type o} drywel ls Required ~ Ofwb e INWND F'ACIFtC ENGINEERIIVG "aowsrRiN¢ Memap PRt7JECT Sheiley i_a9ce - Phese I PEAK FLDW CALCUlATION PRDJECT, ShnJlsy Lake - Phase I " pETENTIOId Bd4Slk pE8f[3N 6ASIN, N BASiN' N OESIONER TRW 7ot Area 0 49 Acres pATE. 11130I95 fmp, Area 73780 SF ~.~fFT Ci a 064 i,~T' f x` • 3 . ~~r,`•. ; Time IncremenS (min) 5 CASE 1 Time c! Conc, {min} 5.Q2 Qu HI ove (c1s) 03 10 ft, Qverlnnd Flaa deslgn Year Aow 16 Area (acres) 0485 Ct . 015 ~ Impervious Area (sq R) 13780 t- 10 h 'C' Facta ❑ 6393 n e 040 # '248' Vdume PravEded 5 . Dfl20 ' Area"C 0310 Tc = 9 11 mm , by Equsum 3-2 af C3uidelines # 7ime Time Ine Intens 4 Deve9. Vd Irs Vd Out Staraga 5E10 ft. Gutter ffow (min) (sec) (m/hr) (cfs) (cu f!) (cu ft) [cu ft) •'~,F'~x = Z1 50.0 F0► Z2 502 ~i naa31$ avav~ ~R397 aaaa90 307 l2= 35 TypeB=1D ~x~; •~cc~ ~ ~ n= 0016 Rdied = 3 5 ' 5 300 318 099 398 90 309 s m 0020 to em 2.2a 069 aaa i ea 3oa a m= 1& gm 177 055 550 270 28e d o 0131 ft. 20 1200 145 0 45 568 380 228 25 1500 1 21 038 401 450 151 A Fl TC TCtotal I Oc 30 1900 104 632 813 540 78 eea- - o esoaa- naeaaa oaeeme eaee¢- a-Oa s-- 35 aiao 091 4,26 e21 630 -9 ❑ aa 007 ❑ sa 3.90 502 318 098 ao 2400 082 025 me 720 -114 E'~~'{ <c as 270D 0.74 ❑ 2a w ei❑ -1e7 G7peak far Case i a 0.89 cfs 50 300D 068 ❑ 21 e54 sDO -248 55 336i7 084 0,20 675 8w -315 89 38DO 0.81 0.19 700 1088 300 CASE 2 65 39a7 060 019 745 1170 -425 aPR===- 70 4200 0.58 0,38 7-74 1264 ,488 Casa E assumas a Time af ConaantraHon less then 5 minuLes so that tha 75 4500 056 017 799 1350 -551 pealc Bow d90(3 18)(Imp Aran} = 091 eTe 86 4800 053 016 sos iaam -634 • 85 5100 052 ❑ 1 B &39 1590 -M 90 54U0 050 016 &..:5` 1820 -767 So, !ha Peak flow for ihe Bssin is She greater ol fhe twp flom, 95 57[)0 ❑ A9 p 15 882 1710 -828 Q 89 CTS 100 8000 048 0 15 908 1800 -892 208' dRAIHAGE PQND CALCULATI[]N3 Required '2013' Storage Volume ~ s~ = Vmpervfews Area x 5 m] 12 m/ft 57+1 cu ft 208' Staraga Volume Prrnnded cu ft ~RYWECL REQUIREMENTS - 10 YEPrR pE51C'aN $TOFiM Mawmum Storage Required by Bowsving 308 cu ft Number and Type of Chywells Requlred 1 Single . ~ 4 E}auble lP1LATl[7 PAGIFIC EIYGINEEFiING B0INSTRING 7NETMOD Pi3CalECT Shelley Lske - Fhase I PEhK FL~OW CALCLILATICIN Pf~{SJECT 8h~ley Leke - Phase { ❑ETEN11OAi 6ASIN DESIGN 6A59N 0 BASlN C L7E51GNER TAW Tot Asas 0 7"7 Rcres DATE 11130195 Irnp. Aras 1170 3F C a 031 ~ ,t Tima 1neresient (min) 5 CASE 1 j Tlmeaf Conc (min) 838 puHlow [CTB] 4.3 150 ft. Overland Ffow ❑eaign Ysar FEow 10 Area (acrea) 0766 Ct = 015 Impennvus Ares (sq ft) 7170 L= S 50 fL 'C' Fetctar 03111 'Zpa' Volums Rrowded n = 0.40 S= 0060 Area • G 0238 Tc = 407 mm , bY E9uehar 3-2 af Guidelmes 'f"•-'.c'~~",, i`~c TImB Time Inc InFens Q Qevei Vd In Val Qut Storege 350 ft C'autter flow ? (min) [sec] (m/hr) (cTs) (cu R) {cu ft] (cu ft) ry ~C1a= a m- vccc ccocca Ccac=c cvavocc accaoa cc-av~ zI = so o F« aa s~ ass 2.80 06 ~ aaa v~ s a2~ z2 - 35 rype a = 1.0 n R 4 018 Rdlad = 3 5 5 300 318 0 79 305 90 216 s= 0040 14 so 224 053 sso Isa xso 15 oD 1 77 9 42 435 278 165 d- ❑.i 00 H. 20 1200 1 45 0 35 480 380 100 25 1500 1 21 029 470 450 20 p R ra rc rc tcnai i oc as Iano 1 04 025 478 san -62 evoaa- da~~,~a a~aaaa .a=a~aa ~asaaa aoaaaa oaa~oa !,`tt 3.5 2109 031 022 dBd B:o _148 J 't 0 27 ❑ U5 0 87 2 31 8 38 2 84 067 40 2400 ❑ 82 ❑ 24 494 720 -226 ~ 45 270] 074 d 19 409 810 -311 Qpeak Iw Casa 1- 4 87 cPS 50 sGpo 0.88 016 507 9w -393 . .~3.". 55 330Q 064 ❑ l S 523 680 -467 60 3600 481 ❑.Y5 542 1080 -538 CASE 2 65 3800 0 60 014 576 1170 594 ~ 70 42QD 058 014 588 1250 -682 Case 2 assumes a Time aP ConcentrsSEon less tPsen 5 minutes so thnt the 75 4500 o58 0 13 618 1350 -792 penlc flmvr =.90(3.78) (Imp. Area) e n 47 cTa e0 48a0 053 013 823 1440 -817 a5 6100 062 ❑ ia saa 1530 -882 80 5400 0 50 012 659 1820 -961 Sa, ih e PeeSc florv Tor the Basin is the greatef M C1e tWO tl[wYS, 95 5700 049 012 884 1710 -1028 0 87 cfs 100 6000 048 0 11 701 18w -1689 ~ 208' ORAINAC:E PONQ CALCULATICeNS Requ[red'2fl8' Storage Voluma lmpEVVious Area x 5 in 112 dn/f[ 299 cu }fi LRYWELL 209' Storege Valurne Provided cu ft RE(]LIIREMEIY75 - 10 YEAR DESIGN 57C7RM Maadmum Storage Requcred hy Baarsfing 227 cu ft j ~ Numper and Type of Orywells Required 1 Single 0 Dentble INLANL7 PACfFIC ENGINEERIfVG BOW3TRINC3 fuIETHOb PRQJEC7 8hOey Lske - Phase I PEAK FL[3W CALCIJLATION PFiQ.JEC7. Shelley La1ce • Phase f DETEMTION BA51N DESIGN BAS1N P BASIN P DESIGWER TRW Tot Area 103 qcres DATE' 11130/95 Emp Area 7438 SF C~ 027 # Time Increment (m3n) 5 GRSE 1 Trme of Caic (min) 542 Outflow[cts] 03 140 ft. Qvarlend Flow 4s, Design Year Flow 10 1 029 ' ~ : • : Area (acrea) ct = ❑ 15 9mpervious Pvee, (sQ ft) 7438 L a 140 ft :,:'C' Facta 0.2744 rr = 040 '-"204` Ydume Prcm ded S= 0080 > Area + C 0.282 Tc a 3 58 min, by EquaLon 3-2 af Guidelines Tme Time Ine Intens O Devel Vd In Vd Out Staage 250 st Gutter flrn,sr (min) (sec) (Iryhr) (css) (cu ft) (cu n) (cu n) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 21 - 500 Fcr 22 5.42 325 3 07 087 378 98 2e[7 Z2 d 35 Type B= 1 m n P 4418 Rdled a35 5 300 3,18 0.90 361 40 271 5 5 0.025 10 8m 2 24 0 63 449 100 289 ;`~'~~'a••? 15 9IX7 177 050 505 270 235 d= 0120 n dD 120t7 1.45 041 637 360 177 : 25 1~D 121 034 550 450 100 A R ❑ Tc Tc tQtal I Oo 30 1800 1 04 029 591 540 21 saooea aa_c~~ =emaso oaaaQa - 35 2140 091 029 568 930 -82 ' 4.~ 039 4 006 087 1.84 542 307 0 87 40 2400 4.82 0.23 681 720 -139 45 2700 074 021 567 8'10 -223 S.: f.dpmk fa Case 1~ 087 cYs 50 3000 ❑ B9 0,19 587 899 -303 ~ 5 5 3300 089 a i 8 616 9N -374 60 3600 ❑ B 1 0.17 &49 1080 -441 CASE2 65 3900 OSO 017 675 1170 -497 ~~i•~~.?\ a e a a a e a 71I 4200 058 016 748 S 2BA -554 Casa 9 assumas d Time oT Concentratiae lesa Ihen 5 minu[e$ so 7int the 75 4500 058 016 729 1350 -627 Peak flow m90(3 18)(imp Area) = a ae cfa ea 4800 0.53 0.15 ras 1440 -705 95 5100 0.52 fl 15 76.5 1530 -765 90 5400 0150 0.54 778 1820 -842 90, the Peetk Rvw for Rhe Bascn ia tlaa greater eA tAe tava flovrs, 95 5700 0 49 014 804 1710 -om 087 pta 100 e(]00 048 014 829 16M •972 4 206' I7RAfIVRGE Pfl1+ED GALCllLA710N$ Requrred '208' Storage Vdume = Impeev]csels Aree X s in 0 92 mJft 910 cu 1[ 268' St[XAg6 AIdUYY10 PYG1YIded CG Et ~ f~ ❑RVweLl REauiReMeNTS - 10 vEaa oesIaN sraRM Maxlmum SYorege Aequired by Bowstnng 280 cu f3 Number and Type of prywella Rec{uired 1 Single a Doubls IhILAhlO PACIFIC ENC'.yI1HEERING r BOWSTRINCi METHO❑ PFid.IECT Shelley Lake - Phasa I PFa4K FL.OW CALCULATION PRq.7EGT Shelley La}ce - Phase I GETEMTION BASIN OESIGN 6ASIN ❑ SASIiH ❑ ❑ESIGNER 7FCW Tot Area d 98 ,AcreS DATE 11130196 tmp Aree 18875 SF C ~ 0 48 Tme IncremenY (min) S GASE 1 4ime af Cone (min) 13 70 aa~,~aQ~ ' put(IpYa (CfB) 0,9 140 ft, pveileusd Flow aesign Year Flaw 10 Aras (acres) 0 983 Ct = 015 Impervlous Area (aq (t} 18675 t- iao n ,'c' Factor 0477 n = 0,40 '208' VoEume Pranded 5 = 0040 Araa • C 0489 Tc a 441 mirs, by Equshexi 3-2 af Guidelines x Tma Time Inc lntens O Qedel Vd In Vol Out Starage 1240 ft Guttcr Bow _ (min) (aec) (inAhl (cfs] (cu ft) {cu ft] (cu ft) 21 m 50 P] Fa 22 r 13.70 822 7.87 0.88 gm 247 721 e=- 22 = 35 7yrpa B 4 10 rr = 0016 Rd I0d a 3 5 5 3m 318 1 48 589 go 508 s a 0024 10 BW 2.24 1.05 aaa 180 654 is ona 177 m a3 ers 270 709 d a 0 120 ft ~ 20 124a i 45 068 1006 360 648 • 25 1500 121 057 1010 -0..~00 560 q R 4 7c 7c tateJ I qc 4~~ 30 S8Q(} 704 0 49 1044 540 474 =d=d=g _ - r•- - - 35 2100 041 043 9415 630 965 0139 0 06 9 86 929 1370 1 87 0 SB 40 2400 ❑ B2 0 38 S CY3a 720 310 45 2700 074 035 1034 610 224 f]pgak Tor GaSg 1 d 0 88 CSs 5CI 3000 0 68 032 5446 800 148 ^;x,• 55 3304 ❑ 84 0 30 1074 990 84 60 3600 061 0 28 7110 168Q 30 CASE 2 B5 39BC1 080 025 1178 19 70 6 - m=m=- = 70 4200 058 027 i2i8 1260 -42 Case 4 e$aumes a Tfms of Conaentra4on leas ti7en 5 m3nutas so thst the : 75 4SOa OSs 026 1255 1350 -85 pmk now a 90(3.1e) (imp n,ea) = i 23 CIa 80 aWO 0.53 025 1262 1440 -s 7a as sioo osz 024 1312 1530 -218 90 saDD 050 023 1332 1620 -288 80, the Paek flaav }a the Basln is the greater rA tha twa ftowrs, 95 5700 0 49 023 1374 1710 -338 1 23 cfs 100 6000 0 48 0 23 1413 1ew 367 : 269' ORAINRGE Pt]ND CALCLJLATIONS Requfred '208' Storage Vdums _Impervious Aiae, x.5 in 112 inlft 773 cu R 208' 3tarage Valume PrnWded cu R ORYUVEll, REC3LIlREArfENT3 - 10 YEAR DE81GM 3TOR1N Maxmum Starrge Requtrad hy 9owstring 721 cu fC ~ Numt+er and Type of Drywella Required 1 Single 0 Daubla INtAND PACIFIC El+lGINEEWING HC}WSTFiIhlO METHOD PRQ.fECT' &hd ley Lake- Phase I PEAK FL06i1 CALCULATION PROJECT Sheiley Lake - Phase I DETENTION BASIN DE31t3N BAS1N R BASIH F ; f C7ES1CsNER 1`RW Tot Area 247 plcres ' DATE 11E3tij95 imp Arsm 2e576 8F : C ~ 0 29 z ~ ~ . ~ / Tima Incremerst (mfn) 5 CASE 1 Tima of Conc (min) 931 ~Outflrnr(cTs) 1 84 S[ Oralsnd Flaw Deslgn Year Flow 10 . ~ Area (acres) 2460 Cs = o s5 >'•'f Impeavioua Aree (eq Ft) 20576 L= 80 tt ,C' Faclrx 02937 n = ❑ 40 '208' Volums?rcnnded 3= 01720 Area * C 0.724 7c ¢ 388 min, by Equabwi 3-2 0► GuEdelines Trrre Tirne knc Intena q Devel. Vd in VoI Out SFOrage 880 ft Gutter flow (min) [see) {inihr) {cfa} (cu n) [eu ftj (cu ft) ~aaoaa vesoame - oasaa ~="aa zt - 5aa Forza s3t 559 ~ 233 1 sa 1261 559 7os aa= Z2 = 36 TYPe H= 1 a f,~ n= 0.058 Adled = 9 5 5 91R1 318 2 30 828 300 828 5= 0024 10 600 224 1 82 1282 sco 682 15 9w 1 77 128 1397 900 497 d= 0 155 R. 20 1260 1.45 1 D5 1460 12DO 250 25 1500 1 21 0 98 1481 75~ -19 R R O Tc Tc toflal I f.9c 30 18oo 1 04 0 75 1499 18CiU -361 aQao4,~ aaaaaa aa~aao Qoaaa- aabava oaaeQa aavaeo 35 2140 491 (]BS 1509 21fl0 -551 0E4 008 1 7(] 5 43 9 31 233 1.6B 40 240U ❑$2 0.59 1538 2400 -882 . f, 45 2700 ❑ 74 054 1549 2700 -1151 Opeak iDr CR99 1= 1 68 cfs 5a 3000 0 BS 0.49 1571 3000 -1429 55 3300 06+1 ❑48 1s18 3" -1682 60 3800 0 81 0.44 1674 3600 -1928 CASE 2 65 3900 060 0 43 1 777 3900 -2123 a====- = 70 4200 0,58 042 1844 42DS] _2356 Gase 2 assumes a Ttma of Ccxscentration less tian 5 mfnutes su tliat the ~ 75 4500 0 58 041 1902 45qo -2598 peeSc How a90(3 18)[Imp. Aren] = 1 35 eTs ~ 84 98W 053 4 38 1915 4800 -2885 B5 5100 052 038 1992 5100 -3108 i~ 90 540E1 0 50 036 202-0 5440 -3376 So, " Poa}c flow for the Basin is Cse greater tN [he ma V rwas, 85 6700 0 49 036 2090 5700 -mSfl 1.88 cts . s~~. ,3• 100 61000 048 035 2152 8000 -3848 208' DFiAINACaE F'QfVb CALCULATIDN8 Requfred'20&' Storsge Vduma Impumwus Arsa x 5 m 112 inlft 857 cu ft 208' Storege Vo[ume prrnn d ad cu ft « DRYWELL RE❑113REMENTS - SO YEAR pESfGH STORM l4laMmum Storage Rsquired by Bawaemg 703 cu R r• ' kumtser and Typa of Ory+nells Require-d 0 &3ngle 1 couble fM1lLAIYO PACIF3C EyGlAlEERfNG BOWSYRIN['a WIETHC70 PRpJEC7. Shatl Laka - Phame I PEAK FLOW CRLCULATIDN PROJEC7' SPoelley Lake - F'hese I t DETENTION BRSIM OESI~'sN BASIN. hAOQ H BASIN. MdORN DE$IGNER TRW ToY Area B 81 Acre.r l]ATE 01l2410 Imp AraS 88172 SF J:. "{,i•_ • C ~ 032 Time Incremsnt (min) 5 GASE1 Tima oT Conc (min) 990 y Out}low [cfsy ~ BD Pt. threrland F1Qrv Design Year Flow 70 Rrea (aere$) 6,808 ce imperwoas Area (sq tt) 66172 L= 80 FL %'C' Factar 0.3173 n _ 0.40 ~ '208' Vdume Provldsei S= 0020 Area " C 2.7 60 7e ~ 3 88 m3n, by Equatlon 3-2 oT Guidelinas Tims Time Inc, Intena O Devd Vd In Vd Out Starage 1240 R. Gutrer flvw (min) (sec) (InRhr) {cfs} {eu n] (cu ft) icu tt] ~ ~oa~a QaooaQ ~aeoQ~ 9~Aaaao ovaa~A aaosaa 21 = 50 0 For 22 9~ 594 2 24 485 3B55 i 168 ~7U I2= 35 T+(peB~iO n Q 0.016 Rdled Q 3.5 5 300 318 8.87 9781 6m 9181 S- 0024 t❑ 6DO 224 4 84 3880 9 20D 2880 15 900 1.77 382 4213 1800 2473 0.230 ft 20 92DO 1 45 3.13 4391 2400 1991 25 I 5co 1.21 261 4469 3004 1449 ea A ae 6~ ~ ~ W~a e a a -R Tctafsl ~oa~ aa ~ = Oc 30 1800 1 04 2.25 4498 3600 896 { - 35 2100 0 91 1.97 4525 4200 325 1 42 p.11 486 602 990 2 24 d 85 40 2400 0.62 1 77 4809 4900 -191 a 45 2700 074 7,60 4839 yqpp -781 S]peak fa Case 1~ 4 95 ciS E,0 3006 0 86 147 4709 Sm -1297 55 3300 0 84 1 38 48-01 Bwo -1758 Bt7 3600 061 1 32 5010 72pp -21 B0 CASE 2 PS 39D0 0.80 1 30 5317 7800 -2483 a o,~ e o a o ~s c. 70 4200 o5B 7.25 5515 8400 •2885 Case 2 assumes a Time af CpncenVatlon dess i7rsn 5 minutes so tha[ the 75 4500 056 1 21 5m 9000 331 g flow a.90 [3 18) pmp Area] = a as crs ao 4800 053 114 5727 eapo -3873 85 5100 0 52 112 5959 10260 -4244 90 5400 0 50 1.08 6051 1GBOO -4749 50, the Peak flow Ta the Beasin is the greater of fhe hva Reaws, 95 5700 0.49 106 6247 41400 -5153 4 85 cfa 1DD E000 0 48 1 04 6A3l 12000 -5569 208' ❑RAINAGE POND CALCULATIa1d5 Raqufred `208' Staaga Vdume ff£f ' Impennars Area x SLn 112 inlf3 2757 cu ft a 208' 3tomgg Vduma Pravided cu n DRYWELL REOUIREMEN7S - 10 YERR DESIGk STORM hAe)dmum Storage Aequireei by Bawstnng 2860 cu n Num6erand Type cA [Srywslls Requfred U Single a 0.76ub1e tiVLAND PACIFIC ENGIiVEERiNG BOWSTRINO METHOD PR0.IECT Shelley Leke- Phese I PEAK FLOW CALCULATION PROJECT: Shelley Lake- Phase I co OETENTION BASIN DESIGN BASIN: S BASIN: S OESIGNER. TRW ~ r'«•, t ~e• s;.cfi2n ra. Area o aa ncres <•.s:~r,~~.. j4 Imp DATE: 11 /30/95 Area 8714 SF C = 040 Time Increment (min) 5 CASE t Vs••~ Time of Canc. (min) 5 00 Outfl ow (cts) 0.3 20 ft. Overland Flow Design Yeer Fow 10 ;-Arean (acres) 0 461 Ct = 0.15 Impernaus Area (sq ft) 8714 l= 20 ft. 'C' Factor 04008 .R;.,,~. n = 0.40 :4%%"`%x• '208' Vdume Prowded t:•r~i LS= 0.020 Area • C 0185 Tc = 1.69 min, by Equation 3-2 of Gwdelines ; y,~o-~n<•;<} Time Time Ine. Intens. O Devel. Vd.in Vd.Out Storage 370 ft. Gutter flow (min) (see) (in/hr) (cfs) (cu ft) (cu ft) (cu It) %;~:kv v asea=~ oeaa easeee Z1 - 50.0 For Z2 ~zt,f'`5.00 300 3.18 0 59 236 90 148 <o= {w a;'~ QI" Z2 = 35 Type 8= 1.0 n= 0018 Rdled = 3.5 v t 5 300 3.18 0.59 236 90 148 <~e S= 0.040 10 600 2.24 0.41 291 180 111 15 900 1.77 0.33 328 270 58 d~ 0.095 n. c F zo 1200 1.45 0.27 sas 360 > . . 5~ •vi'S~+ 25 1500 1.21 0.22 358 450 '92 A R a Tc Tc total I Oc Y'a°<:`~ ~ 30 1800 1.04 0.19 365 540 -175 a m a o e v Q o m v o o o - a e e v - o 35 2100 0 81 0.17 370 830 -260 0.24 0.05 0 59 2 53 5.00 318 0.59 40 2400 0 82 0.15 379 720 -341 . 45 2700 074 014 383 910 -427 ' Qpeek for Case 1= 0 59 c}s 50 3000 0 68 0.13 390 900 -510 ~<vr+hM~' S3L~ 55 3300 064 0.12 402 990 -588 y.r}Y'Y 60 3600 061 Qil 417 11080 -663 CAS E 2 i~`-~:,: - 85 3900 0.60 0 t 1 444 1170 •728 ~ «~v 70 4200 058 0.11 481 1260 -799 Case 2 assumea e Time of Concentrnbon less then 5 minutes so that the 75 4500 0 58 010 478 1350 -874 Peaic no,N o.90(3.18)(Imp. Area) o o aa crs so asoo 053 0.10 aeo 1440 -seo as 5100 052 010 soo Isso -i o30 • h, ~ so saoo 0.50 0 09 soa 1620 2 So, the Peak flow fa Ihe 8asin is the 9reater of the two flows, 95 5700 0.49 0 09 525 1710 -t 185 s 0.59 cfs 100 6000 0 48 0.09 541 1800 -1259 208' DRAINAGE POND CALCULIITIONS ? ~~tx?.r•~ Required '208' Storage Vdume ~ar'.: Imperwous Area x 5 in ! 12 in/ft 260 cu ft ~'>.~ti a;::•seo•• 208' Staage Volume Prrnnded cu ft DRYWELI REQUIREMENTS - 10 YEAR DESIGN STORM ' MeAmum Storage Required by Bowstring 148 cu ft r "}kti ~ Y h\• ~ Number and Type of Drywells Reqwred 1 Singla . . 0 Double INLAND PACIFIC ENGINEERINO #°}c BOWSTFINt3 METHt7D RROJECT' Shelley Lake - Phesa I PEAK FLONl CALGLlLFLTEOFd PROJECT, ShqWley Laxe - Phsse I OETENTION BR81N 6ESfC'iN BA81N' T BASIN' T DESIC'aMEA. 7RW TeM. Aaea fl Bd Acres DATE' 11130195 lrTip Afea 18400 SF C ~ 064 ~ Time Cncrement (minJ 5 CASE 1 Time of Canc. (min) 602 p11iHGYY (Ct8) 03 ~ s 20 n vaerland acyw Deslgn Yaar Woar tia nrea (aeres) 0642 Ct a fa i5 Imperviotea Area [aq ft] 18406 L= 20 R. ~'C° Fac[ar 0.8439 n- 040 ~'Zpg• Vdumo Provldsd S= 0020 Araa • C 0413 Tc ~ 4 63 min., py E4uahon 9-2 a} Guidetines Time Tfine Ync InYens. 0 ❑avo Vd In VoP Out 3tarage Bap tt. Gutier ncw (min) {$ec) {tnlhl (cis) (cu tE) (au Ft) [a ft] aa~ae aQ~oaa aa~aao aQa- - a - omaap- aaaamv neaaso Z1 a 50,0 Far Z2 602 391 289 119 577 9[]8 489 Z2 = 1 Type B= 1 4 n= 0016 Fidled = 3 5 5 300 3 48 1.35 529 so 438 5. 0.925 10 HDO 224 093 669 1 B9 489 s a= 1S s00 1 79 0.73 748 270 479 d a 0.138 k • 20 1200 1 45 0 6G 793 36Y3 433 25 1500 9.21 050 811 450 361 ~ m e v m o v. o o ~ a~ea aae~ a a s e F, l s o Q o Q e m ~ 30 4900 1 04 043 828 54Cf 288 - a o s e - a ~ 35 2100 0.91 0 38 938 83~ 208 049 tr oa a 24 433 602 2.89 119 aa 2400 082 034 ass 720 135 45 2700 074 031 ass aio 53 Qpeak Tor Casa i= 119 cfs 50 3DD0 ❑68 028 877 am -23 55 3300 064 4 29 DO5 990 -85 Bfl 3600 061 025 938 1 m -1 d2 GASE2 85 8900 e60 025 997 1170 -173 - - m a. 70 4200 0 58 024 11338 1380 -224 Gsee 2 ceaum[rs a TEme ef Cancentraiion Iasa than 5 minutes so tltat [he 75 4~ 056 ❑ 23 1070 1350 -280 Padk eow - 90(3 48) (1 mp, rvea) ~ 1 21 ct3 ao 48M 063 022 1078 1440 -162 ;•Fw as sjocr 052 raa> 1122 rsao -408 DD 5400 0.50 021 1141 1620 -aTs Sa, tha PBak Tiow Sa the BeLsin is V1e graGter 4T ~1e [wo na~vs, 95 5700 0 49 020 1179 1710 v~31 aa f 21 cts 1DD 6= 0 48 020 1214 18Co -s85 20e' ORAINAGE PON❑ GALCULA71QN5 ry'-~ yA9~, Required '208' Stwage Vduma a Ivnpermous Are& x 5 In 1 12 Inlft 767 cu f3 2D&' Stcmge Vdums Rrovided au fi vAYrirELL REOIJIREAAENTS • 10 YERR DESIGN BTORM ' 14fesximum 6torag$ Aoquired 6y Hawstring 989 eu ft h ldurrt6er and Type oi Orywells Reyuired 1 Siregle 0 (7ouble INlAND PACIFIC ElJGif+lEERINC3 Phass B❑W57RINC'a METHflO PRDJECT Shdley Leke - I REA3( FiLi?►H GALCl3LATIDN PRC1.7ECT Sheitey Lake • Rhase I E7ETENTIC]N BA31N DESIGN BASIN' U BASIN' ll DESfGNER, TRW Tcu. Area G 54 Azres QhTE' 11 J3f1J95 Imp. Area 16520 5F c- oes ~ Time lnerenent (mm) 5 CASE 1 Time of Csane (min) 5 47 Qutnrnv (cta) 0,3 20 €t. t7veriana Ftaw Qesign Year Faew tv prea (ecres) D.539 Cs = o S6 Impervlaus Aren [aq n] 565241 L = 20 TL C' Fact[x 06781 r5 = 040 4'208' Vo[ume Provlded S s 0020 Area ' C ❑ 3B5 r<e 7c a 1,63 mm., by Equabon 3-2 oP Guidelines , i~ Time Tima Inc dntena 0 LTevel Vd.ln Yd.[7ut Strraga 550 n. Guner now (min) [aec) pnlhh {cfs} (cu ft) [cu ft] (cu ft) a- ava e- vaev amaesm saeme- - mamoa- emenae - soasQ Z1 = SO D FOf IP 547 328 3.1)5 1.12 481 98 893 22 4 Type B a I 0 n- 0 418 Rdled = 3 5 5 300 318 1 16 467 90 377 8 R 0025 10 610 924 082 583 9$U 403 C=~ 15 900 1 77 065 654 270 384 ~ d~ 0 135 K 20 1200 1 45 053 895 900 335 25 95W 1 21 044 713 450 263 A A O Tc Tc [n[ef I Qc 30 1800 1 04 ❑ 3$ 727 Safl 187 a. as=R.a ¢=~~=o -soaaa saomva sooam F^ 35 2106 091 033 738 ew 106 046 0,07 4 13 3 79 5 47 3 08 1 12 40 2400 0 82 0 30 753 726 33 45 2700 074 027 760 BSO -50 , r. Opeak for Cn9e 1~ i 12 cis • 50 9000 0 88 0 25 773 6w -1 27 55 3300 064 ❑ 23 788 990 -192 ~ 60 3606 061 082 827 1 C180 -263 cnsE a as 39DO 0.80 022 aen lt7O •asa . a. . . 70 4200 0 5a 021 914 1200 -348 Case 2 assumes e Tima of Goneentradon less than 5 minutes ao thai ttig 75 4500 0.58 0.20 9" im -405 peak ftow a sata laf(imp area) = i 09 ers eo aaoo 053 ❑ ys ssy 1440 -aas 85 540D 0 52 ❑ 1'9 8m 1530 540 90 5400 ❑ SQ ❑ 18 3 007 1620 ~819 Sa, ths f'sek ilowr fcx' 1hff Besfn is tlie qrea[w oS ihe twu Aan+s, .r~,~; 85 5700 0 43 018 1041 1710 -559 1 12 cfe 100 6" 048 018 1072 1806 -728 ~ < 208' C1FiAINADE POHQ CAN,CULATfONS ,s~,~ ~ Requlred'24$' Starage Vdume - impe.nnous Area x 5 m f 32 intf[ 88B cu K • 208' Storage Vdume Prwided c:u Tt ~[3RYWELL REOLIIRENEENTS • 10 YF11R pESfGN SF{]RM Mexlmum Staraga Requ9red 6y 8owsTring 443 cu ft • `c Numher and Type of Dry+wells Ftequired 1 Single 0 QQltble li+lUiNp PRGIFIC EhlG1FlEEA1NG tF~ N# BOWSTRING METHOO PROJECT. Shelley Leke - Phase I PEAK FLOW CALCULATION PROJECT: Shelley Leke - Phese I • F'''^~„ DETENTION BASIN DESIGN BA31N. V BASIN: V DESIGNER TRW Tot. Aree 0 27 Acres DATE: 11130/95 Imp Area 10600 SF 3:> C. 0 82 w,~',~~ f• l Time Increment (min) 5 CASE 1 #~t Time of Cona (min) 8.73 Ou 2o ft Overtand Flow ~ tflow (cts) 0.3 a~0= Design Yenr Row 10 k /VBQ (BCfBS) 0 27 Ct L~~ 0.1 20 5 tt. Impervious Aree (eq R) 10600 f<. y~ ``z 'C' Faeta 0.8249 n ~ 0.40 •~i,,,~ . '208' Vdume Provided S = 0 020 ,v,•,v Area • C 0.223 ~ ~;t%i• A\' Tc ~ 1 69 min., by Equatlon 32 of Guidelines .xo„<,~ .;,',ck• Time Time Ine Intens. a Devel. Vd.tn Vd.Out Storage soo R. Gutter eow °SgJ2:~~"•a .'~r (min) (sec) (In/hr) (cts) (cu ft) (cu k) (cu ft) ~ oseenm -•-v-- -veo-- ---m--m --n--- 21 @ 50.0 Fa Z2 8 73 524 2.41 0.54 378 157 218 <=m Z2= t T eB- 1.0 ~•..a«; n- 0.018 Rdled - 3 5 5 300 3.18 0.71 285 90 195 S- 0010 10 800 2.24 0.50 388 180 208 15 900 1.77 0.39 425 270 155 3;,3~ +y'~fi~~.y d~ 0.120 ft. 20 1200 1.45 0.32 445 360 85 ,f 25 1500 1.21 0.27 452 450 2 A R O Tc Tc total I Oc 30 1800 1,0a 0 23 458 540 -82 $s~~~lWwiel . . a. . . . . . . =m°•. =m==. . . . . . . . . . . . 35 2100 0.91 0.20 482 830 •188 037 0OB 0.52 7.05 8.73 2.41 0.54 ~40 2400 0.82 0.1B 471 720 -249 45 2700 0.74 0.18 474 810 -336 Opeak ta Case 1= 0.54 cfe 50 3000 0.88 0.15 481 900 -41 B 55 3300 0.84 0.14 496 890 -494 80 3800 081 0.14 513 1080 -587 CASE 2 85 3900 0.80 0.13 545 1170 -825 ° ° - ° - - - 70 4200 0.58 0.13 588 1260 -694 Cnae 2 essumea a Time ot Concentra0on lesa than 5 minutes ao fhat the 75 4500 0.58 0.12 583 1350 -787 peek flow =.80(3.18)(Imp. Aree) = 0 70 cfs 80 4800 0.53 012 588 1440 -852 85 5100 0.52 012 811 1530 -819 •r, 80 5400 0.50 0.11 821 1820 -889 So, the Peak }low fa the Basin Is the grenter of the two flows, <%<`•~;ya:~ 95 5700 0.49 0 11 842 1710 -1088 0.70 Cfs 100 6000 0.48 011 660 1800 -1140 i+cr, l t~A 208DRAINAC3E POND CALCULATIONS a • Reqwred '208' Storoge Vdume - Impervlaus Area x.5 in / 12 mlft 442 cu k ~ 208' Storage Vdume Provided • eu ft ~ DRYWELL REQUIREMENTS - 10 YEAR DESIGN STORM Meximum Staege Required by Bowstring 219 cu ft Numba and Type of Oryvreils Raquired t Single 0 Double INLAND PACIFIC ENGINEERINC3 BOWSTRiNu ARETFipQ PRQJEGT Sh~le]r Leke - Phase 1 PEAK FLQW CALCl1LATIDN PRQJECT 5hellsy Lake - Phase I DETENTION BASIN iDESIGN $ASIN W BAS1N W QESIGNER TRW Tot Aran 0 27 Acres @ATE 11I34186 Imp Rrea 50600 SF <zaY- Ca 082 n~ ~N ; ~M. Tima Incremant {rrrin} 5 CASE r 1 ~ Time Qf Ccnc (min) 873 C7utflvw(c}s) 03 20 Pt C3verland Row 'O"gn Yser R[sw 10 prea (e[res) 027 Ct = 015 Impervfous Araa (sq n) 10600 L a 20 Tt "'C' Factar 08249 n a 040 '208' Vdume Pmrided & d Q 020 Area • C 0223 Tc ~ 169 min, hy EGusfion 3-2 of Guidelmes Ttme Time Inc Intr.ns ❑Devel Vr9 Cn Yd Qut Starage Boo R. Gutter flow i~ {min} (sec) [in{hr) {cTa} (cu ft) ~cu ft) (ar ft) o 21 - 54i1 Fcx ZP 873 e~a 524 2 41 05'4 ~6O~378 a~ e 157 6O a 813 72¢ 1 Type Bmi❑ n n 0016 Rolled =35 5 3DO 3.18 0.71 285 90 995 5_ 0010 10 600 2 24 050 388 4&i 208 15 900 1.77 039 425 270 155 a- 0120 n. 20 12on v as ❑3a 445 360 ss 25 1500 1 21 027 452 450 2 A R i] TC TC [otal I Oc 30 1800 104 423 458 540 -82 - am_- _ __oems a- av_m eaeeam meeeno amomQa 4- - - z 35 2100 091 ❑aa naa aacs -lse 037 006 052 705 s7s 241 0,54 ' aa zaay 082 a ls 471 720 -249 % 45 2700 074 0 le 474 B5S _k3s ❑peak Is'r Gase 1= ❑ 54 cIs • Sp 3000 068 0 i5 481 Bm -419 55 3300 0.64 014 496 990 -094 ~ BQ 380d ❑ B7 014 533 5080 -587 CASE P 65 9900 060 013 545 1170 -82-5 m- g- - a e 70 4200 ❑.58 013 568 1280 <894 Csse 2 aasumea a Time of ConeentratEai lasa ihan 5 minutes sa tliat tha 4 y 75 4500 058 012 5@3 4350 -787 peak now A,so(a 1 s) (I r,P n,ea} a 0.70 crg 80 45oo 063 012 5e8 aaao -ssa 85 51 DO 052 012 ewt 1530 -919 so saov 0.50 vi1 sai 1620 -9ss S4, the Peafe flnrv for the Beafn is tha greater of tlie 4 w a flcavs, B S 5704 0 49 d 1 v 042 1710 -f 068 0 70 cts 7 DO 6000 0 48 n 11 660 1800 -1140 « 20s' ❑RAINAGE PC]Nd CALCL7LATIONS • t Required '2013' $tasge Vdume Impa+nws Area x 5 m 1 12 mlfl 442 eu it 2U8' Stcxage Valume Prmded cu ft D RYWELL REOUlFiENtENT5 - iD YEAR DESIGN 330RM Mwdmum Starage FSequired Gy Bowatring 219 cu R ~ Numher and Type caf C7rywe1ls RequEred 1&ingle 0 Dauble INLAMD PAC1F1C ENGINEERHVG z BpWS7RlN(3 METHOD PFiWEGT Shelley Lake - Phasa I PEA9C FLt?W CRLCIfLATION PRDJEC`f Shdley Lake- Phase I tr ~r IJE7ENTInIJ BA31N L1ESIGM BASIN x BASIM x DESIGNER' TRW Saf Wea 0 65 ACre3 DATE' 11190j95 Imp Arafl 14587 8F C ~ 0,54 Time Pncrement {min 5 ) CASE 9 Time o} Gonc, (min) 5.Do ms-a--- Ch.ittlow [cfs] 03 10 R. Odeland F7ow ❑"gn Year Flow 10 nrea (aeres) d s48 Ct - 0.15 l~ fmpervlous Area (sq ft) 14587 L- 10 tq. 'c' Factar ❑ 53a4 ri - 0 40 '208' Vdume PrwnCed 5 a 0.040 AFed • C ❑ 348 Tc - 091 rnm.. by Equattai 3-2 0! [3uldellnes TFme Tima inc tntena O Develi 4a1 Prr 1Ard out Starsge \ F-~'= asn n. Guner flow (m3n) (eee) [inrhr] (cfs) (cu tt) (eu n) (cu rU aoa:e aoGaon aaa~Ra P'mwoas maaama- C- aa= R -aaaao Z1 - 50 0 Fr%Z2 5.00 300 3.58 1.i1 945 90 355 22- I TypaB - 1 a n- 0.01e Rdled ~ 3 6 x~ 5 300 3 18 1.11 445 90 355 g a 0040 10 BQO 2 24 078 547 1 BO 387 a e= 15 Np 1 37 082 617 270 347 d= 0 123 ft ; 2(] 1204 4.45 050 857 384 297 25 15IXY 7 21 0.42 675 450 825 14 R ❑ TC YC tOw I f]C 30 18DC) 4'64 038 fiSFS 540 148 am~- - e o:seod aamaaa Qp- ea.m °mnda- asaa4m o- - - a ra 95 21iD 091 08$ 697 B~ 87 s 0.39 006 1.11 2 8t7 5 00 318 1 11 40 2400 0 62 0 29 714 720 -8 ~>S 45 2700 0.74 028 722 940 -88 C3pBalc Icr Cesa i= 5 17 pfs 50 30DL1 068 024 734 900 -188 ~ 55 3300 0.64 022 758 m •232 60 36W 061 0.21 788 1060 -294 CA3E 2 65 391] 060 021 838 1170 -334 - - - a a a a 70 4200 Q 59 Q 24 858 1250 .3.92 Cese 2assct[nes a Fkma ot Concentrntfon lass than 5 minutea so d-tat !he 75 4500 a 58 019 897 1350 -453 peas now a so(a ia) (amQ. wea) = o se cfs sca 41100 0.53 o.+a 904 yaao -ssa ~ as 5100 0.52 0ia 941 1530 _11W 80 5400 050 0.17 957 1620 -M Sa, the Penk flo'w lar tha Basin is the gtsater ot" th B 4w0 il[srra, 95 570Q 6 49 017 &89 t79 a -723 a 11 efa 100 ww 0.48 017 1018 1800 -795 ; ^4 M6" ORAlM1AOE POND CALCLlI.AT9UfdS Requimd '24B' 8tarege Vdume = Impernous Aree x 51n 112 inl4Y 607 cu fE r.F.: 4,) ~ 208' Stcnage Vciume Prandeci cu TC CJRYWELL REClUIREMENTS • 40 YEAR DE51GN SiORM MaAmum Stwage Required Gy Baws7ing 367 Cu tt ~i~ ~ iVumbef and Typa o} drywedls Hequired 1 5ingls 0 Owble ENtAND PACIFlC ENGINEEFifRlC3 . %'~••.,;BOWSTRINC'a MET-ECYD PRUlECT Shelley Lsha - F't~ese I PEAK FLDW CALCUL4T10N PROJECT 5hellsy Lske - F'hase I ~s"' ~ QETENTION BA511~! DESICaN BA51N A Temp BASIN A 7emp t DESIGNER 3RW Tot Area 87 Acres OYITE 021s 1 t$6 Imp Hrea 1+3593 SF C = 0 33 F Time Inerement(min) 5 CRSE 1 ;'Time oF Csxtic {min} 919 =====a~ M1 : C)udlaw (cPs) ❑ 3 ioo R rJverland Raw Deaign Yew Flow 16 Ar88 (aCrES) 0669 C[ _ ❑ 15 Impen,n~s Ar~ [sq ft] 14593 L= 1~ F[ r~~`w ~'C' Factar 03253 ~pAD n = •k ` \ ` .208' Vdume Rranded ~ ` ~ S a 0010 i`~`` • Aree " C 0218 ~s. ~ ~..'Frt 'fc = 546 m i n , by EquaUOn 3-2 QP Guidelines x Time Tcme Inc Intens Q Oevel Vd In Vp9 C]ut Storage s,•r ^,r: 450 n Guner Elow (min) (sec) (m11°ir) {ete} (cu tt) {su n) (cu ft) a- - an aaaa- n maa~am 21 _ 500 For za 919 551 234 ' 051 377 is§ a,+ xa = so rype a- 1 o u---------- „a n= 0 018 RS711ed m3 5 5 900 318 069 278 SO 188 5 . pOdp 10 600 224 049 364 180 2IJ4 15 900 1 37 039 419 270 148 d= 0071 H 20 1200 } 45 032 438 380 78 25 1sW 1 25 026 444 450 -S A R ❑ To Tc total I Qc 30 18)0 5 a4 ❑23 450 540 -90 --n- -Qa- a- -a- - =a- ..35 2400 495 ❑2t7 +353 630 -177 0 25 004 ❑ 5r 373 910 234 051 aQ 2400 0 62 0 18 482 720 -258 45 2700 074 ❑ 1S 465 8143 -345 Opeak Ipr CasN 5= 051 cfS SQ 300D 0 68 015 472 90a -428 55 3340 064 014 486 98p -5534 -x ~ 3&~ 0 61 013 503 1 a80 -577 CP~SE 2 Or 65 3900 0 50 0 i 3 534 .70 70 -636 70 4200 058 013 554 1260 -706 C6SB 2 8881Jrri@g 9 Tirt7@ pF C9r1CerliraUWl 1e5s 111fl11 5 f1'11R11[eg gp (haI {h9 75 4500 p 56 ❑ 9 2 571 1350 -779 peak }low a 90(3 18)(tmp AreH) = ❑ 9$ cIs 80 98(3D 0 53 0 12 575 1440 -B&5 85 5100 4 52 ❑ 1 1 598 1534 -932 90 050 o„ 60 a 1620 .1012 So, She Peak SI[rn tor thB Basin i9 ttie gveater aS the two flows.. 35 5700 049 Q 5 i 628 1710 -1082 0 98 c fs 100 6000 048 010 648 1800 - i 154 208' ORAIHAGE PC1N[3 CALGULATI❑IJS Required '208' Stvrage Vdume r = Impervious Area x 5 in 1 12 m/ft COS cu n 208' Sicxage Vdums Pravided cu R C3RYWELL RECaUIREfSAENTS - 10 YEAA DESIGN ST{JRM Meucimum Stwage fiequired by Bawstnng 211 cu St ' hlumber and Typs af prywells Required 1 Smgle 0 Dauhle INLAAID PAClF9C ENGfiVEERING Bc]WSTRING METHOQ PROJEC7 Shdley Leke - Phese I PEAK FLdW CALCllLl1TION FRUIECT Shelley Lake - Pllase I DETENTIQM BASIkV ❑ESIGN BASIN A Temp + K(L) BA51N ATEmp + K(L) pE$ICaNEFi TFEFhi Tat Area Q 61 Aeres DATE 02111196 imp Aree 19835 SF C= 051 ~'~,•~3 ~ Time Increnent (min) 5 CASE 1 Time o! Ccnc {mm} 860 C)utllow(afs) ❑3 100 Fi Overland Flow Design Year Flaw 10 •~f Ares (acres) ❑ 8p5 C[ = 0 15 Ympef+nou9 l4P58 (Sq f[) 99835 L a IDD Pt F~'G' Fac[rrr 05744 n - 040 •Ro~ '208' Vdume Prcrnded 5 = 4010 Area`C 0414 Tc = 5 46 min , by Equasion 3-2 at Guidelines Terne Time Ine Intens 0 Devel Vd in Vcri (]u4 Storage 450 €t Gutter Tlrnv Qrtinf {sec} (mlhr) (cfs) {cu h} [cu ft] (cu ft) 21 - So0 ForZ2 ' 860 516 243 100 695 155 540 c== 22 = so Type 6- i 0 -%~=~•.r~;____._________~_ .__._____--•___~_r~._______.._ n- 0018 Fidled a 3 5 ^'n 5 300 318 5 32 529 90 439 5= 0040 10 6{Kl 2 24 0 83 719 180 539 ;k5~;•;~ '15 sw 1 77 ❑ 73 788 270 519 , fi• ,a d= 4 092 fi • 28 S 2O0 1 45 060 826 360 +s$B 29 1500 121 050 833 450 384 A R C7 Tc Tc [0[81 I S]e 00 ie00 i 04 043 855 540 713 - - - 35 2100 ❑91 036 857 630 227 042 005 101 314 860 2 43 100 40 2400 082 0 34 874 726 154 45 2700 074 031 801 810 71 Opea3c For Case 4= 1 00 Cts 50 30p0 0 88 028 $54 900 -6 ~,,•F,F•: f 55 330Q 064 6 27 921 990 -69 64 36W 051 025 954 5080 -126 CASE 2 65 39C10 060 ❑ 25 9013 9170 -157 ~ 70 4200 0 58 0 24 1051 128i1 -209 <C c 4 ! CaSe 2 assumga g Time aT CcmCenVaaon iess lhen 5 rninutes sa thai [he 75 45W ❑ 68 023 9084 f 35!] -2$8 peakSlow =90(318][fmp Area] - Y 30 CES ~~~t~~~`= • 80 1$W 053 022 1092 5440 -348 • 85 5100 052 022 1136 1530 -394 SO 5400 050 021 9 154 1fi20 -456 Sa. ttse Peak PIcrw PoU the Sasin [s the greater of t}ae two flows, 95 5700 049 020 1192 1710 59 8 1 30 Cf5 100 6000 048 020 1227 18IX7 -573 208' DRAIPlAGE PC1fVD GALGULATIDNS $ Required '208' SForage Vdume Impervious Rrea x 5 in f 12 inift 026 cu tt V" ' 209' Storag6 Vdume Provided cu ft tt % dFdY1M1fELL REQllIFiEMEt47$ - 10 YEAR DE51GN $TfJRtv1 ` Maximum Sttrage Required by @owstnng 540 cu fC ' ''Aium6er arsd Type of prywells Requved 1 SLngla F? Douhle IHL4Np PAGlF9C ENC,ItNEERING `