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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK E PIT RSB <br />Area 100.8 <br />Curve Number <br />Soil Type: B <br />Ground C Good <br />Cover Ty 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 <br />None <br />Percent Cover. <br />88.1 <br />C: <br />0.0090 (Barfield Warner) <br />Surface Roughness <br />Moderate <br />P: <br />0.65 (Barfield Warner) <br />CP: <br />0.0058 <br />Average Slope and Slope Length <br />Elevation <br />Length Difference Slope <br />(ft) (11) <br />400 <br />50 <br />12.5% <br />350 <br />60 <br />17.1% <br />500 <br />70 <br />14.0% <br />400 <br />50 <br />12.5% <br />600 <br />90 <br />15.0% <br />1200 <br />170 <br />14.2% <br />600 <br />90 <br />15.0% <br />700 <br />90 <br />12.9% <br />400 <br />60 <br />15.00/6 <br />500 <br />70 <br />14.0% <br />Average 565 14.2% <br />