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Runoff Curve Number: ............. CN = 74 <br />Time of Concentration: ........... Tc = 0.85 <br />Storm Type: ....................... = 11 <br />Pond and swamp areas spread <br />throughout watershed ............... = 0.00 percent of A <br />0.0000 Acres <br />2. Frequency ........................ yr = 25 <br />3. Rainfall, P(24-hour) .............. in = 2.40 <br />4. Initial abstraction, la............ = 0.7027 <br />5. Compute la/P ....................... = 0.2928 <br />6. Unit peak discharge, qu ...... csm/in = 328.94 <br />7. Runoff,Q .........................in = 0.5529 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,qp ............... cfs = 38.4026 <br />Pond Volume Calculation based on Universal Soil Loss Equation 12/3/2007 16:10 <br />Input Data <br />Landuse Area Rainfall Erod- Length Slope Ls Cf Pf <br />(ftA 2) Factor ability (ft) <br />RECLAMAT 5525586.0 50.0 0.37 2802.3 2.9 0.74 0.50 1.00 <br />Runoff = 0.553 inch. <br />Sediment Density = 94.000 <br />Time = 3.0 years <br />Drainage Ratio = 0.37 <br />Total Area = 126.850 acres <br />Gross Erosion = 873.414 tons/yr. <br />Total Yield = 323.163 tons/yr. <br />Runoff Volume = 5.845 acre-ft <br />Sediment Volume = 0.474 acre-ft <br />X:\Western Fuels Nucla\Permit Revision 2009\Adequacy Response #l\Final Files\ATTACHMENT 2.05.3(3)-14 POND 011 <br />AS-BUILT 28JAN 10 DRAFT.wpd Attachment 2.05.3(3)-14-22 <br />