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Runoff Curve Number: ............. CN = 74 <br />Time of Concentration: ........... Tc = 0.85 <br />Storm Type: ....................... = II <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) .............. <br />in = 2.40 <br />4. Initial abstraction, la............ = 0.7027 <br />5. Compute la /P ....................... <br />= 0.2928 <br />6. Unit peak discharge, qu ...... <br />csm /in = 328.94 <br />7. Runoff ,Q .........................in <br />= 0.5529 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp ...............cfs <br />= 38.4026 <br />Pond Volume Calculation based on Universal Soil Loss Equation 12/3/2007 16:10 <br />----------------------------------------------------------------------- <br />----------------------------------------------------------------------- <br />Input Data <br />------------------------------------------------------ <br />------------------------------------------------------ <br />Landuse Area Rainfall Erod- Length Slope Ls Cf Pf <br />(ft " 2) Factor ability (ft) ( %) <br />------------------------------------------------------ <br />------------------------------------------------------ <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 #1\Final Files\ATTACHMENT 2.05.3(3) -14 POND 011 <br />AS -BUILT 28JAN10 DRAFT.wpd Attachment 2.05.3(3) -14 -22 <br />