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• Upland Area <br />Cover <br />Juniper Woodland affected area <br />Vegetative Cover <br />Litter <br />Ground Cover <br />Cover Type -Pinyon Juniper <br />43.3 <br />24.0 <br />67.3 Table 4.8-13 <br />Hydrologic Condition Fair <br />Soil Type - Torriorthents/Rentsac, PAP page 4-81 C <br />Curve Number 73 <br />Table 2-2d-Runoff curve numbers for arid and semiarid rangelands <br />Refuse Pile Pond <br /> <br />RUN-OFF VOLUME - -Refuse Pile 10-Year <br /> Precip Direct Run-off <br />Area Acres Curve # Amount Run-off Vol A-F <br />Disturbed 2.30 80 1.5 0.29 0.05 <br />Refuse 2.60 89 1.5 0.63 0.14 <br />Upland 11.80 73 1.5 0.13 0.13 <br />TOTAL 16.70 0.32 <br />e <br />TOTAL REQUIRED WATER VOLUM E - - A-F 0.32 <br />SEDIMENT VOLUME -Refuse Pond <br />Use the universal soil loss equation. <br />A=RKLSCP <br /> <br />R =rainfall factor 30.00 <br />K =soil erodibility factor -sandy loam 0.37 <br />LS =combined length slope factor 900 - 2% 0.39 <br />C =cropping management factor -Figure 7 1.00 <br />P =erosion control practice factor 1.00 <br />A =sediment, tons/acre/year 4.33 <br />Three YEAR SEDIMENT VOLUME - A-F 0.09 <br />16.70 ACRES - 115 #/CF <br />TOTAL REQUIRED CAPACITY -- Acre-Feet -Refuse Pond 0.41 <br />M" M(vii)-3 6/02 <br />