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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK D PIT RSB <br />Area 367.8 <br />Curve Number <br />Soil Type: <br />Ground Cover. <br />Cover Type: <br />CN: <br />Erodability Factor <br />K: <br />Control Factor <br />B <br />Good <br />Herbaceous <br />62 (TR -55 Table 2.2d) <br />0.25 (Permit) <br />Type and Height of Canop None <br />Percent Cover. <br />89.5 <br />C: <br />0.0083 <br />(Barfield Warner) <br />Surface Roughness <br />Moderate <br />P: <br />0.65 <br />(Barfield Warner) <br />CP: <br />0.0054 <br />Average Slope and Slope Length <br />Elevation <br />Length <br />Difference <br />Slope <br />(ft) <br />(ft) <br />300 <br />80 <br />26.7% <br />600 <br />100 <br />16.7% <br />300 <br />40 <br />13.3% <br />600 <br />90 <br />15.0% <br />600 <br />90 <br />15.0% <br />400 <br />60 <br />15.0% <br />400 <br />60 <br />15.0% <br />400 <br />60 <br />15.0% <br />800 <br />130 <br />16.3% <br />450 <br />50 <br />11.1% <br />400 <br />50 <br />12.5% <br />600 <br />50 <br />8.3% <br />750 <br />110 <br />14.7% <br />400 <br />70 <br />17.5% <br />450 <br />70 <br />15.6% <br />450 <br />70 <br />15.6% <br />500 <br />90 <br />18.0% <br />750 <br />110 <br />14.7% <br />300 <br />50 <br />16.7% <br />350 <br />50 <br />14.3% <br />300 <br />40 <br />13.3% <br />600 <br />110 <br />18.3% <br />800 <br />140 <br />17.5% <br />400 <br />50 <br />12.5% <br />350 <br />40 <br />11.4% <br />300 <br />50 <br />16.7% <br />Average 483 <br />15.3% <br />