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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK A PIT RSB <br />Area 172 <br />Curve Number <br />Soil Type: B <br />Ground Cover: Good <br />Cover Type: Herbaceous <br />CN: 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. 89.1 <br />C: 0.0085 (Barfield Warner) <br />Surface Roughness Moderate <br />P: 0.65 (Barfield Warner) <br />CP: 0.0055 <br />Average Slope and Slope Length <br />Elevation <br />Length <br />Difference <br />Slope <br />(ft) <br />(ft) <br />100 <br />30 <br />30.0% <br />600 <br />90 <br />15.0% <br />800 <br />150 <br />18.8% <br />700 <br />110 <br />15.7% <br />300 <br />60 <br />20.0% <br />500 <br />90 <br />18.0% <br />600 <br />110 <br />18.3% <br />700 <br />110 <br />15.7% <br />350 <br />40 <br />11.4% <br />600 <br />80 <br />13.3% <br />1000 <br />130 <br />13.0% <br />1000 <br />170 <br />17.0% <br />450 <br />100 <br />22.2% <br />400 <br />50 <br />12.5% <br />Average 579 <br />17.2% <br />