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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK C PIT RSB <br />Area 75.7 <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. 94.4 <br />C: 0.0058 (Barfield Warner) <br />Surface Roughness Moderate <br />P: 0.65 (Barfield Warner) <br />CP: 0.0038 <br />Average Slope and Slope Length <br />Elevation <br />Length <br />Difference <br />Slope <br />(ft) <br />(ft) <br />500 <br />50 <br />10.0% <br />300 <br />40 <br />13.3% <br />600 <br />70 <br />11.7% <br />200 <br />30 <br />15.00/6 <br />550 <br />100 <br />18.2% <br />550 <br />60 <br />10.9°k <br />600 <br />80 <br />13.3% <br />400 <br />100 <br />25.0% <br />600 <br />110 <br />18.3% <br />700 <br />150 <br />21.4% <br />400 <br />70 <br />17.5% <br />Average 491 <br />15.9% <br />