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• <br />~'or0. ~lecan a~avla ~itnh . inc. a-sF oe <br />srsarr4~rr4.cor4s~ucso~• SITE PREPARATION & DRAINAGE REV 1 <br />ust uu crtr. uT4w STANDARD FORM <br />RUNOFF & SEDIMENT CALCULATIONS 9/80 <br />SHT.IV~OF 12 <br />DETERMINATION OF SEDIMENT VOLUME, SETTLING VOLUME <br />AND TOTAL STORAGE VOLUME OF SEDIMENTATION PONDS <br />PROJECT WES1cICrJ FUELS Ll.SEKAr~O /n~rJE JOB NO.S.`_C•'~__ <br />is ~ SE P.i~Fp ¢ 3 POND NO. _ _ <br />gy D•/A yV_ DATE ~l_`Lo _ CHECKED BY DATE <br />1. SEDIMENT VOLUME <br />CONTRIBUTING DRAINAGE AREA, ACRES <br />DISTURBED AREA IN CONTRIBUTING AREA, ACRES <br />Ir=,.o <br />I I, 5 <br />A. Sediment Volume = <br />1 acre ft. of sediment per acre of disturbed area. <br />1 acre~ft.;acre X I 1 .50 acre <br />I . I S acre f t. <br />B, Sediment Volume = 3 years sediment from entire watershed as dr. termined by the Universal <br />Soil Loss Equation (USLEI USLE : A=RKLSCP <br />• <br /> <br />Where: A = Average annual soil loss in tons/acre. <br />R = Rainfall factor <br />K = Soil erodibili[y factor <br />LS = Slope length and slope gradient factor <br />C = Cover factor <br />P = Erosion control practice f;rctor <br />Watershed must be divided into sub areas if dlfieren: factors occur for different areas with ~n [he watershed. <br />SUBAREA <br />I.D. NO. gUB AREA DISCRIPTION <br />~ AREA <br />Ar R K LS C <br />I p A TONS <br />A X Ar <br /> Ur,d;> urbe• <br />/AO.jersvn Store CI4 <br />3.5 <br />3o I <br />C2$ <br />2.1 0.042 <br />I <br />Ol <br />2.(0 <br /> ~c{vse-{zeclor,.,r.1-6=.c .0.5 3v I o~Z4 b ~ 1 1 bl.Z 705,0 <br /> <br />3 ~e.. c) Aria <br />M, e.-s+.. 5+,,.,r, Glv <br />7.0 <br />-' O <br />o.2S <br />U.S I ( <br />I <br />4.L <br />4.z <br /> <br /> <br /> <br /> <br /> I <br />TOTAL AREA 15,0 TOTAL TONS PER YEAR 'j 12.4 <br />TONSlV EAR ~ 30001h/TON a 3 V EARS <br />SEDIMENT VOLUME (ACRE FEETI = - 1.23 <br />(Settled Density = ~o Ib/ft31 tJ0 Its/h.~ .43560 h2/ ACRE <br />10-80 <br />