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~'oN,33ncona~nvi$~itnh,~nc. asF-o6 <br />e~cixssea.coweraucroea SITE PREPARATION & DRAINAGE REV. 1 <br />usr ~wxs utv, uuw STANDARD FORM <br />RUNOFF & SEDIMENT CALCULATIONS 9180 <br />SHT. 100E 12 <br />DETERMINATION OF SEDIMENT VOLUME, SETTLING VOLUME <br />AND TOTAL STORAGE VOLUME OF SEDIMENTATION PONDS <br />PROJECT \VE5TE121J =VELS `nESEKAl~O /AirJE - JOB NO. UG•?r>•6_ _ <br />REFUSE Aei:A '~ Z ',.f 3 _ POND NO. ~~' 7-f3._ <br />BV C.M.\V, GATE cJ-Z~•f~U _CHECKEDBV _ .. __ DATE _ <br />8. PRINCIPAL SPILLWAY DESIGN <br />10 year 24 hour Storm Discharge O = ~4'•~O cis (See Section 61 <br />A. Drop Inlet With Splitter type Headwall (SCS Engineering Field Manual) <br />L=J~ft. Y= r? ft. H=aft. 0=4~~~~fs <br />Dp = 30" Fig 6-25 or Fig 6-26 <br />Dr =. `}D„ Fig 6-27 <br />h (req'd) = O.`73 Fig 6-27 <br />h (used) = I •~ <br /> <br />~'~ <br />B. Anti Seep Collars (Increase Seepage path by 15%) <br />Sp=O.oi25 Z= 3 <br />Ls = vIZ+41 (1+Sp 15 (3 +al It+.oizs ~~.04 <br />.25-SP .25-~~=~ <br />n _ 2 V _ 2~ <br />Ls+2nV>1.15Ls 3/cfi4+2x2z2~ >1.15x?%-54 <br />Max. Collar Spacing = 14 V = 14 z Z = 28 <br /> <br />Spil Iway <br />Crest <br />Em`er`gency Spillway Crest <br />~- <br />Anti-seep collars P`ssumed Phreatic Line <br />~~q 2.0 <br />~ ~ Pi=e conduit 1 <br />L <br />H = Head on pipe spillway (pipe flowl, centerline of outlet to emergency spillway <br />crest or to design high water if no emergency spillway <br />h = Head over riser crest 11.0 min.l <br />L = Length of pipe <br />D = Diameter of pipe conduit <br />DP= Diameter of riser <br />Sp = Slope of pipe conduit <br />n = No. collars <br />V = Collar projection 12' min.) <br />Cs = Collar spacing <br />H <br />• <br />`J <br />!~ <br />-n <br />0 <br />D <br />1050 <br />