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C J <br />~ a4acon d~AVfB~tdh ~3nC 4~SF-os <br />uarrier~-eor~T~uerorrr SITE PREPARATION & DRAINAGE REV. 1 <br />~wir uru crtr, urwr STANDARD FORM <br />RUNOFF & SEDIMENT CALCULATIONS 9180 <br />SHT. 1 OF 12 <br />DETERMINATION OF SEDIMENT VOLUME, SETTLING VOLUME <br />AND TOTAL STORAGE VOLUME OF SEDIMENTATION PONDS <br />r1 <br />~J <br />• <br />PROJECT ~ESTE.2r'-1 'CU61.5 OESE2AD0 /,tr1.J6 JOB NO. l~G-346 <br />GsiECK OlVH rL_L T'Hltu df( <br />\ GuEGK p/.llg5 AL,oNCi SGULLIOtiJ C~UI-CH ~6NJ1N0._ <br />BY v~vn (3r~rLeSDATE 3~29I~1 CHECKED BY DATE <br />1. SEDIMENT VOLUME 5E21E5 of GI-ICLr D41ns ALgtFx SCt)LLiowf cuLGa{ wun TRr13uTAarFs <br />~JF.L OQ~vC~S G-o31 T.turL C-034 Foa LoGATIpJ <br />CONTRIBUTING DRAINAGE AREA, ACRES ~ 8 AGYl~S % <br />DISTURBED AREA IN CONTRIBUTING AREA, ACRES Q-4,0 Ac2ES SC~~V- 3E <br />D-34/o • G • 020 <br />A. Sediment Volume .1 acre ft. of sediment per acre of disturbed area. <br />.1 acre~ft./acre X ~¢•C) acre <br />= 4.4 acre-ft. <br />B. Sediment Volume = 3 years sediment from entire watershed as determined by the Universal <br />Soil Loss Equation (USLE) USLE : A=RKLSCP <br />!E AQPAS 3GW- t 4(,5o AGt?es <br />Where: A = Average annual soil loss in tons/acre. <br />R = Rainfall factor <br />K = Soil erodibil ity factor <br />LS = Slope length and slope gradient factor <br />C = Cover factor <br />P = Erosion control practice factor <br />iE-Xc <br />3 GItV-2 23q- r~ <br />ALLop x..W-3A 'rNuR 3E 122,b ~r <br />DRNJIae Se o~ sGrv-2 2aU ~. <br />Sml.ly A4[A BElrw OP.1 13 ~, <br />ez~~.a Acrtts <br />Watershed must be dwided into sub areas if different factors occur for different areas within the watershed. <br />SUBAREA <br />I.D. N0. SUB AREA DISCRIPTION AREA <br />Ar R K LS C P q TONS <br />A X Ar <br />~w_f ~ua~ G~ N2 FeEA Forz o; 30 0.20 0.22 0,09 t,o a, i2 55Z <br />x-IW-Z cad 30 D,lS l0,¢ o.t0 1.O 2, (0'14 <br />SCqu~-3f1 dl,l0 300.15 (0,41.0.1p 1,0 2.8 120 <br />S~I,J-3B~ ,p 3'].2 30 0,10 11,1 0,2 I,Q ~,0 2G I <br /> <br />SCaw-3E 'DISTU4rjbp .~-4,EA <br />FEGL/VmAm~1.~ WDCIC,a o• <br />d4,0 <br />30 <br />O,ZS w <br />I-j.8 <br />0,10 <br />045 <br />L:73 <br />2q (0 <br />56oF SC -2 24b 30 0,24 B.4 D.lo 1,0 /,,05 I Soo <br />BEhw 1 13 3o p,lol 24 O,lo 1.0 '7,2c ~/¢ <br /> <br />70TAL AREA yZG .~ TOTAL TONS PER YEAR 34'r'J7 <br />TONS EAR a ~000Ib/TON x 3 YEARS <br />rv~ SEDIMENT VOLUME I~CrRE FEET) _ ~ ~ = Q,51O <br />C~cx~ Ors"f. ArTF,A OJL~t U 3 ~Q IM/ft.3 x 67560 ft~/ ACRE <br />(Settled Density = SLIb/it 1 <br />-AL <br />