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• <br />~[~,~3dC>J113~dV18~Ulh RC. -- - a-SF-06 <br />SITE PREPARATION & DRAINAGE <br />arsauruaa-corsaraucroa• REV. t <br />a~sr urta crty, ur~ts STANDARD FORM <br />RUNOFF & SEDIMENT CALCULATIONS 9/60 <br />SHT. 5 OF 12 <br />DETERMINATION OF SEDIMENT VOLUME, SETTLING VOLUME <br />AND TOTAL STORAGE VOLUME OF SEDIMENTATION PONDS <br />PROJECT ~VESTEK.~J FVE_]„g__~SEILAoo in~tiE JOB NO. uG- 3+(~. <br />REFUSE AIZeA d 2,_~ 3 PONDNO. R -2 3 <br />BY ~- I.W. DATE ~~ ~ 27. ~`~ CHECKED BY DATE _ <br />6. Peak Rate of Discharge -Used to Design Emergency Spillway, Road Culverts and Interceptor Ditches <br />Drainage Area = Acres <br />Hydraulic Length = _ Feet <br />Equivalent Drainage Area = __ Acres I Fig. 7 ; TP-1491 <br />Average Watershed Slope = % <br />Weighted Watershed Runoff Curve Number <br />A. Peak Rate of Discharge From Charts ES-1026, ES-1027, TP-t49 <br />• <br />Rainfall Frequency = Ip Years Rainfall Depth = I -b _ Inches <br />01(For RCNtI = O(ES 102_far slopes) x Slope Correction Factor (Ez. 2-01 <br />' x <br />cfs <br />02lFor __ RCN2) _ _ x _ cfs <br />Equivalent Discharge = cfs (Interpolate Between Ot and 021 <br />Actual Peak Discharge =Equivalent Discharge z Actual Drainage Area <br />Equivalent Drainage Area <br />_ rr <br />Actual Peak Discharge x ( 1 = 34. ~~ cfs <br />Note: 01 and 02 above refer to runoff resulting from RCN's to nearest 5 160, 65, 70, etc.) <br />If computed RCN ends in 0 or 5 160, 65, 70, etc.l , 02 and the next line will not <br />be needed. In this case, Ot runoff will be the equivalent Discharge. Refer to <br />SCS-TP-149 and Engineering field Manual, Chapter 2. <br />Type I Starm distrihut~an ES-1026: Hawaii, Alaska coastal side of Sierra Nevada <br />and Cascade Mountaina in California, Oregon and Washington. <br />Type II Storm distribution ES-1027: rest of United States, Puerto Rico, and <br />[he Virgin Islands. <br />~` FRom ~NZ'S S'a ~ ~iV <br />~, <br /> <br />