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Basin 011 C <br />Location: New Horizon Mine <br />Developed <br />1. Data: <br />Drainage area: .................... A = 38.6676 Acres <br />Runoff Curve Number: ............. CN = 80 <br />Time of Concentration: ........... Tc = 0.61 <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 = 10 <br />3. Rainfall ,P(24 - hour) .............. in = 2.00 <br />4. Initial abstraction, la............ = 0.5000 <br />5. Compute la /P ....................... = 0.2500 <br />6. Unit peak discharge, qu ...... csm /in = 416.41 <br />7. Runoff ,Q .........................in = 0.5625 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp ...............cfs = 14.1517 <br />Pond Volume Calculation based on Universal Soil Loss Equation 08/07/2009 <br />Input Data <br />Landuse Area Rainfall Erod- Length Slope Ls Cf Pf <br />(ft ^2) Factor ability (ft) ( %) <br />Reclamat 7666560.0 50.0 0.37 2237.0 2.1 0.52 0.50 1.00 <br />Runoff = 0.350 inch. <br />Sediment Density = 94.000 <br />Time = 1.0 years <br />Drainage Ratio = 0.37 <br />Total Area = '176.000 acres <br />Gross Erosion = 850.413 tons /yr. <br />Total Yield = 314.653 tons /yr. <br />Runoff Volume = 5.133 acre -ft <br />Sediment Volume = 0.154 acre -ft <br />Total Volume = 5.287 acre -ft <br />Universal Soil Loss Equation : Application in this Program <br />-------------------------------------------------------------- <br />-------------------------------------------------------------- <br />Required User Input: <br />X: \Western Fuels Nucla\Permit Revision 2009\Adequacy Response #1\Final Files\ATTACHMENT 2.05.3(3) -14 POND 011 AS -BUILT <br />28JAN10 DRAFT.wpd <br />Attachment 2.05.3(3) -14 -5 <br />