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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK E PIT RSA <br />Area 96.3 <br />Curve Number <br />Soil Type: <br />Ground Cover. <br />Cover Type: <br />CN: <br />B <br />Good <br />Herbaceous <br />62 (TR -55 Table 2.2d) <br />Erodability Factor <br />K: 0.25 (Permit) <br />Control Factor <br />Type and Height of Cano None <br />Percent Cover: <br />87.7 <br />C: <br />0.0092 <br />(Barfield Warner) <br />Surface Roughness <br />Moderate <br />P: <br />0.65 <br />(Barfield Warner) <br />CP: <br />0.0059 <br />Average Slope and Slope Length <br />Elevation <br />Length <br />Difference <br />Slope <br />(ft) <br />(ft) <br />300 <br />60 <br />20.0% <br />600 <br />70 <br />11.7% <br />850 <br />120 <br />14.1% <br />850 <br />130 <br />15.3% <br />300 <br />40 <br />13.3% <br />550 <br />110 <br />20.0% <br />650 <br />110 <br />16.9% <br />1000 <br />130 <br />13.0% <br />750 <br />100 <br />13.3% <br />1100 <br />170 <br />15.5% <br />Average 695 15.3% <br />