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<br />• <br />~,~ACJRB~V18~Glh ~fIC. 4.SF-06 <br />111G~r1EEllf COMfr xUCi011• SITE PREPARATION & DRAINAGE REV. 1 <br />s~.r E~xE cnr, ur~w STANDARD FORM <br />RUNOFF & SEDIMENT CALCULATIONS 9/60 <br />SHT. 100E 12 <br />DETERMINATION OF SEDIMENT VOLUME, SETTLING VOLUME <br />AND TOTAL STORAGE VOLUME OF SEDIMENTATION PONDS <br />PROJECT ~VESTEI2N +"UGLS ~~gSB2hpJ /~~r+2 - ~ - JOB NO. OC- 3~ _ _ <br />~Eni W+En1?P?'ICN po r-+O f=(Z L- Go2~Pl_ _ POND NO. _~P-~ i <br />BV Wn, 1711L.ICFSDATE lo. fj.rou CHECKED BY DATE <br />8. PRINCIPAL SPILLWAY DESIGN <br />10 year 24 hour Storm Discharge O = 32.2 ds (See Section 61 <br />A. Drop Inlet With Splitter type Headwall (SCS Engineering Field Manual) <br />L= 13`~ ft. Y= to_o ft. H= 24' ft. 0=40•Scis <br />Dp = 2~' Fig 6-25 or Fig 6-26 (~ ~ =4,04 X O.-T< = Go ~53 <br />Dr = Fig 6-27 f <br />h (req'd) _ ~T_ Fig 6-27 <br />h (used) _ "p <br />• <br />• <br />8. Anti Seep Collars (Increase Seepage path by 15%) <br />Sp= IZ,Io'.Z= 3A <br />Ls=v12+41 It+~ ] =~1 3+41 [1+O_i2L ] _ $¢ _ <br />.25-Sp .25-o.itL <br />n _ d V _ 2~ <br />Ls+2n V? 1.15Ls ~~+2x 4'x? >1.15xQ4_7 <br />Cs= Ili 100,1• > q],a <br />r <br />Max. Collar Spacing = 14 V = 14 x? = 2'6 <br />Emergenry Spillway Crest <br />~ G~/ <br />r 5 h Riser Assumed Phreatic Line <br />= Anti-seep collars <br />4 3.0 <br />Principle y Dr 1 1 ~ Pi`e conduit ~ 1 <br />Spillway <br />Crest DP Sp - <br />V Cs <br />Ls <br />_ L <br />H = Head on pipe spillway (pipe Howl, centerline of outlet to emergency spillway <br />crest or to design high water if no emergency spillway <br />h = Head over riser crest (1.0 min.) <br />L = Length of pipe <br />Dp = Diameter of pipe conduit <br />D <br />= Diameter of riser <br />r <br />Sp = Slope of pipe conduit <br />n = No. collars <br />V = Collar projection (2' min.) <br />Cs ° Collar spacing <br /> <br />~INVE .7 E1 <br />76oZ T <br />~,G,2(. <br />5Cao2 <br />24 = 4} <br />w <br />n <br />is <br />D <br />