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r~ <br />• <br />.7 <br />KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />Streeter Watershed SEDGA© Madel Input <br />Structure 6, Subwatershed 1 <br />Disturbance: <br />Topsoil & Seeded: <br />1-2 Year Reclamation: <br />3+ Year Reclamation: <br />Undisturbed: <br />Total Subwatershed Area: <br />Hydroiagy: <br />Time of Concentration: <br />0 acres <br />0 acres <br />16.37 acres <br />11.13 acres <br />27.5 acres <br />Elevation Length Description <br />13 70 Upland <br />125 412 Grassed Waterway <br />250 864 Diversion <br />Curve Number: 52 <br />Sediment: <br />Rairrfalt Factor: 19 <br />Soil Erodibiiity Factor. 0.28 <br />Length-Slope Factor: <br />Elevation Length Slope <br />125 190 65,$% <br />150 500 30.0% <br />200 440 45.5% <br />Average <br />158 377 47.1 <br />Corttrot Facfor: 0.03 <br />Practice Factor: 0.59 <br />Exh. 7-SP-18 <br />....................... <br />Revision Date: 2/1/06 <br />Revision No.: TR-63 <br />