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t • • <br />Table 1.4-1. Summary of Trapper Mine SL-09 Phase II pre-mining sediment load demonstrations. <br /> Average <br /> Slope Average Time Representative Runoff <br />Reclaimed Area AMC II AMC III Erodability Control Length Slope of Block Area Volume Sediment <br />Block acres CN CAN Factor K Factor C feet Concen. (acres) ac-ft tons <br />A,D&H-C 89.7 48.0 69.1 0.25 0.049 431 10 0.149 20 0 <br />85 7 <br />8 <br />2003-2004 , . . <br />D&F-AB 204.9 48.0 68.2 0.25 0.050 464 16.1 0.127 20 0.85 20 <br />8 <br />2002-2004 . <br />Table 1.4-2. Summary of Trapper Mine SL-09 Phase II post-mining sediment load demonstrations. <br /> Average <br /> Slope Average Time Representative Runoff <br />Reclaimed Area AMC II AMC III Erodability Control Length Slope of Block Area Volume Sediment <br />Block acres CN Factor K Factor CP feet Cow (acres) ac-ft (tons) <br /> <br />A,D&H-C 89.7 61.0 78.8 0.25 0.016 431 10 0.149 20 1.663 4.0 <br />2003-2004 <br />D&F-AB 204.9 61.0 78.8 0.25 0.015 464 16.1 0.127 20 1.663 9.3 <br />2002-2004 <br />M:\Bond Release\SL-9 (Ph2)\SL-9 Tables\SL-9 Table 1.4-1 Sedcad Summary.xls 09/22/2008