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KENNECOTT EtUERGY CORPORATION <br />COlOWYO MINE <br /> <br />Q07A -Prospect Watershed SEDCAD Model Input <br />Structure 1, Subwatershed 1 (S1-SWS1) <br />nisturbance: <br />Topsoil & Seeded: 0.65 acres <br />1-2 Year Reclamation; 0 acres <br />3+ Year Reclamation: 3.25 acres <br />Undisturbed: 10.83 acres <br />Total Subvratershed Area: 14.73 acres <br />Hydrology: <br />Time of Concenttaf+an: <br />Elevation length t7escription <br />12.5 62.86 Upland I <br />87.5 381.41 Grass WatenMay <br />25 118.46 t7iversion <br />Curve Number: 51 <br />Sediment; <br />• Rainfa!! 1=actor: 19 <br />Soi! Erodibilty Factor: 0.28 <br />Length-Stops fiactor: <br />Elevation length Slope <br />125 550 22.7°!0 <br />105 450 23.3% <br />Average <br />j 11$.00 SOO.OQ 23.d% <br />~ Control Factor. 0.fl9 <br />C Practice- Factor: Q•78 <br />f <br />i <br />4 <br />I <br />Exh. 7-PP-9 Revision Date: 2/1/06 <br />Revision No.: TR-63 <br />