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Vegetative Cover % 43.3 <br /> Litter % 24.0 <br /> Ground Cover % 67.3 Table 4.8-13 <br /> Cover Type -Pinyon Juniper <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 semia rid rangelands <br /> Refuse Pile Pond <br /> RUN-OFF VOLUME - -Refuse Pile 10-Year <br /> Precip Direct Run-off <br /> Area Acres Curve # Amount Run-off Val A-F <br /> Disturbed 2.16 80 1.5 0.29 0.05 <br /> Upland 14.10 73 1.5 0.13 0.15 <br /> TOTAL 16.26 0.20 <br /> TOTAL REQUIRED WATER VOLUME - - A-F 20 <br />0 <br /> . <br /> SEDIMENT VOLUME -Refuse Pond <br /> Use the universal soil loss equation. <br /> A=RKLSCP <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 0.08 <br /> 16.26 ACRES - 115 #/CF <br /> TOTAL REQUIRED CAPACITY -- Acre-Feet -Refuse Pond 0.29 <br />~.7 <br />TR-22 M(viir28 12/07 <br />