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Doc Date:12/11/2001 <br />• Runoff Curve Number and Runoff <br />Project: AMENDMENT <br />Locations POND 13 S !! C <br />Develope <br />1. Runoff curve number (Cn) <br />Cover description CN <br />DIST 91 <br />UNDIST 83 <br />By: GL <br />;hecked: <br />Soi! Type <br />D <br />D <br />07/25/1999 <br />Date: 07/25/99 <br />Date: <br />Area <br />23.610 Acres <br />14.500 Acres <br />II I' II I II I II ~~I~ ~II <br />sss <br />CN (weighted): 88 <br />2. Runoff <br />Frequency .............. : 25 yr <br />Rainfall, P (24-hour) ..:2,40 in <br />Runoff, (Z ..............: 1.29 in <br />Runoff Volume ........ ..:4.11 Acre-Ft <br />Pond Volume Calculation based on Universal Soil Loss Equation 07/25/1999 <br />----------------------------------------------------------------------- <br />----------------------------------------------------------------------- <br />Input Data <br /> Landuse Area Rainfall Erod- Length Slope Ls Cf Pf <br /> (ft^2) Factor ability (ft) (%) <br /> DIST 1659849.1 24.0 0.28 2635.0 13.2 10.79 0.50 1.00 <br />Runoff = 1.290 inch. <br />Sediment Density = 112.000 <br />Time = 3.0 years <br />Drainage Ratio = 0.37 <br />Total Area = 38.105 acres <br />Gross Erosion = 1381.369 tons/yr. <br />Total Yield = 511.107 tons/yr. <br />Runoff Volume = 4.096 acre-ft <br />Sediment Volume = 0.629 acre-ft <br />Total Volume = 4.725 acre-ft <br /> <br />(Revised 12/00) Attachment 2.05.3(3) -10-52 <br />