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Cover Type -Pinyon Juniper <br />i) 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 />Disturbed Area <br />Herbaceous-Mixture of grass, weeds <br />Hydrologic Condition Poor <br />Soil Type -Refuse/Coal/Dirt including right-of-way D <br />Curve Number 89 <br />Table 2-2a-Runoff curve numbers for urban areas <br />Refuse Pile Pond <br />RUN-OFF VOLUME - -Refuse Pile 10-Year <br />Precip Direct <br />Area Acres Curve # Amount Run-off <br />Disturbed 1.71 80 1.5 0.29 <br />Refuse 0.60 89 1.5 0.63 <br />Upland 14.05 73 1.5 0.13 <br />TOTAL 16.36 <br />TOTAL REQUIRED WATER VOLUME - - A-F <br />SEDIMENT VOLUME -Refuse Pond <br />Use the universal soil loss equation. <br />A=RKLSCP <br />R =rainfall factor <br />K =soil erodibility factor -sandy loam <br />LS =combined length slope factor 900 - 2% <br />C =cropping management factor -Figure 7 <br />P =erosion control practice factor <br />A =sediment, tons/acre/year <br />Three YEAR SEDIMENT VOLUME - A-F <br />16.36 ACRES - 115 #ICF <br />I ~ TOTAL REQUIRED CAPACITY -- Acre-Feet -Refuse Pond <br />TR-22 M(vii)-3 <br />Run-off <br />Vol A-F <br />0.04 <br />0.03 <br />0.15 <br />0.22 <br />0.22 <br />30.00 <br />0.37 <br />0.39 <br />1.00 <br />1.00 <br />4.33 <br />0.08 <br />0.31 <br />03/07 <br />