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TRAPPER MINE <br />SEDIMENT LOAD DEMONSTRATION <br />BLOCK AB:H PITS RSB 95-01 PRE-MINING <br />Area 433.6 acres <br />Curve Number <br />Hydrologic Sail Group: 8 (Permit C-81-010, Appendix O, Section XII) <br />Cover Type: Oak/Aspen - SagelGrass (Permit C-81-010, Appendix O, Section XII) <br />Hydrologic Condition: Fair <br />CN (AMC Iq: 48 (SEDCAD 4 CN table -Arid & Semi-arid Rangelands) <br />CN (AMC III): 68.2 (Barfield, Warner, Haan p. 84) <br />Erodibility Factor <br />K: 0.25 (Permit No. C-81-010, Appendix O, Section XIII, Table E-4j <br />Control Factor <br />Type and Height of Canopy: Appreciable brush - 2 m fall ht. <br />Canopy Cover: 50% (Permit G81-010, Table 2.3-13) <br />Percent Ground Cover. 55.49'0 (Permit G81-010, Table 4,42, range site area-weighted data) <br />CP: 0.049 (SEDCAD 4 table for Permanent Pasture, Rangeland) <br />~_~ <br />Average Slope and Slope Length (previously determined for range sites A & B under SL-1 and SL-2) <br />Site <br />H Pit RSB <br />A Pit RSB <br />Average <br />Tlme of Concentration <br />Land Use Category <br />Slope <br />Length (ft) <br />Tc (hrs) <br />SCADINPS2.xls, A&H RSB <br />Len th tt Sloe <br />463 17.1 SL-2 <br />579 17.2 SL-1 <br />521 17.2 <br />1 Forest with heavy ground litter (overland flow) <br />17.2% <br />521 <br />0.139 <br />o9izarzooa <br />