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11 .. . ......... <br />Exh. 7 -SP -17 Revision Date: 2/1/06 <br />Revision No.: TR -63 <br />KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />• <br />Streeter Watershed SEDCAD Model Input <br />Structure 5, Subwatershed 2 <br />Disturbance: <br />Topsoil & Seeded: 0 acres <br />1-2 Year Reclamation: 0 acres <br />3+ Year Reclamation: 164.01 acres <br />Undisturbed: 9.34 acres <br />Total Subwatershed Area: 173.35 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />13 317 Upland <br />225 2111 Grassed Waterway <br />200 837 Grassed Waterway <br />88 4624 Diversion <br />Curve Number 56 <br />Sediment: <br />• <br />Rainfall Factor., 19 <br />Soil Erodibility Factor. 0.28 <br />Length -Slope Factor. <br />Elevation Length Slope <br />187.5 2203.68 8.5% <br />250 1244.2 20.1% <br />Average <br />219 1724 14.3% <br />Control Factor: 0.01 <br />Practice Factor, 0.41 <br />11 .. . ......... <br />Exh. 7 -SP -17 Revision Date: 2/1/06 <br />Revision No.: TR -63 <br />