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• <br />• <br />KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />Streeter Watershed SED►CAD Model Input <br />Structure 1, Subwatershed 1 <br />Disturbance: <br />Topsoil & Seeded: <br />0 acres <br />1-2 Year Reclamation: <br />216,31 acres <br />3+ Year Reclamation: <br />86.44 acres <br />Undisturbed: <br />0 acres <br />Total Subwatershed Area: <br />302.75 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length <br />13 670 <br />175 1669 <br />275 1121 <br />226 4215 <br />Curve Number. <br />Sediment: <br />Rainfall Factor.- <br />Soil <br />actor.Soil Erodibility Factor: <br />Length -Slope Factor. <br />Elevation <br />300 <br />150 <br />150 <br />275 <br />275 <br />Average <br />230 <br />Control Factor. <br />Practice Factor., <br />Length <br />1200 <br />800 <br />1300 <br />2600 <br />1500 <br />iEnll <br />Description <br />Upland <br />Grassed Channel <br />Grassed Channel <br />Diversion <br />60 <br />19 <br />0.28 <br />Slope <br />25.0% <br />18.8% <br />11.5% <br />10.6% <br />18.3% <br />Exh. 7 -SP -9 <br />16.8% <br />0.05 <br />0.38 <br />Revision Date: 2/1/06 <br />Revision No.: TR -63 <br />