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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK A&D PIT RSC <br />Area 453.5 <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 Canopy: <br />None <br />Percent Cover. <br />89 <br />C: <br />0.0085 <br />(Barfield Warner) <br />Surface Roughness <br />Moderate <br />P: <br />0.65 <br />(Barfield Warner) <br />CP: <br />0.0055 <br />Average Slope and Slope Length <br />Elevation <br />Length <br />Difference <br />Slope <br />300 <br />40 <br />13.3% <br />200 <br />30 <br />15.0% <br />700 <br />120 <br />17.1% <br />1100 <br />140 <br />12.7% <br />300 <br />60 <br />20.0% <br />650 <br />200 <br />30.8% <br />440 <br />80 <br />18.2% <br />250 <br />50 <br />20.0% <br />500 <br />70 <br />14.0% <br />200 <br />40 <br />20.0% <br />450 <br />35 <br />7.8% <br />600 <br />110 <br />18.3% <br />800 <br />30 <br />3.8% <br />1,000 <br />50 <br />5.0% <br />400 <br />52 <br />13.0% <br />400 <br />50 <br />12.5% <br />400 <br />60 <br />15.0% <br />300 <br />50 <br />16.7% <br />200 <br />25 <br />12.5% <br />400 <br />70 <br />17.5% <br />250 <br />30 <br />12.0% <br />400 <br />50 <br />12.5% <br />200 <br />20 <br />10.0% <br />250 <br />25 <br />10.0% <br />300 <br />50 <br />16.7% <br />300 <br />60 <br />20.0% <br />500 <br />70 <br />14.0% <br />1300 <br />160 <br />12.3% <br />650 <br />150 <br />23.1% <br />600 <br />130 <br />21.7% <br />800 <br />110 <br />13.8% <br />800 <br />90 <br />11.3% <br />600 <br />70 <br />11.7% <br />300 <br />70 <br />23.3% <br />Average 495 <br />15.2% <br />40 <br />