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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK A,DBH PITS RSC 87-88 PRE-MINING <br />Hydrologic Sal Group: B (Permit C-81-010, Appendix Q, Section XII) <br />Cover Type: Oak/Aspen - SagelGrass (Permit G61-010, Appendix O, Section XII) <br />Hydrologic Condition; Fair <br />CN (AMC II): 48 (SEDCAD 4 CN table -Arid & Semi-arid Rangelands) <br />CN (AMC III): 69.1 (Barfield, Warner, Haan p. 64) <br />K: 0.25 (Permit No. G81-010, Appendix O, Section XI11, Table E-4) <br />Area 134.2 acres <br />Curve Number <br />Erodibility Factor <br />Control Factor <br />Type and Height of Canopy: Appreciable brush - 2 m fall ht. <br />Canopy Cover: 50% (Permit C-St-010, Table 2.3-13) <br />Percent Ground Cover: 55.4% (Permit G81-010, Table 4.4-2, range Site area-weighted data) <br />CP: 0.049 (SEDCAD 4 table for Permanent Pasture, Rangeland) <br />C. <br />Average Slope and Slope Length (A&D pits range site C previously determined under SL-1) <br />ite <br />A&D Pit RSC <br />L th ft Slone /%) <br />495 15.2 <br />H-Pit RSC <br />Average <br />Overall average <br />Time of Concentration <br />Land Use Category <br />Sbpe <br />Length (ft) <br />Tc (hrs) <br /> <br />Elevation <br />Length Chance Sloe <br />Z00 15 7.5 <br />320 25 7.8 <br />550 47 8.5 <br />200 10 5.0 <br />250 25 10.0 <br />500 65 13.0 <br />337 31 8.6 <br />416 11.9 <br />1 Forest wish heavy ground litter (overland flow) <br />11.9% <br />416 <br />0.132 <br />SC4DINPS2.xls, 0.17dJf RSC <br />