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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK D PIT RSA <br />Area 128.5 <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 Cano None <br />Percent Cover. 90.7 <br />C: 0.0076 (Barfield Warner) <br />Surface Roughness Moderate <br />P: 0.65 (Barfield Warner) <br />CP: 0.0050 <br />Average Slope and Slope Length <br />Elevation <br />Length <br />Difference <br />Slope <br />(ft) <br />(ft) <br />500 <br />60 <br />12.0% <br />400 <br />30 <br />7.5% <br />450 <br />70 <br />15.6% <br />400 <br />40 <br />10.0% <br />650 <br />80 <br />12.3% <br />200 <br />20 <br />10.00/0 <br />100 <br />10 <br />10.0% <br />400 <br />80 <br />20.0% <br />300 <br />60 <br />20.0% <br />250 <br />40 <br />16.0% <br />350 <br />40 <br />11.4% <br />400 <br />70 <br />17.5% <br />200 <br />30 <br />15.0% <br />600 <br />60 <br />10.0% <br />Average 371 <br />13.4% <br />