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FULL BUILD OUT CONFIGURATION <br />Disturbed <br />Table 2 -2a -Runoff curve numbers for urban areas <br />Dirt - including right-of-way <br />Soil Type - Loarr <br />C <br />Curve Number <br />87 <br />Disturbed <br />Table 2 -2a -Runoff curve numbers for urban areas <br />Impervious areas - streets and road: <br />Soil Type - Loarr <br />C <br />Curve Number <br />98 <br />Coal Mine Waste <br />Table 2 -2d -Runoff curve numbers for and and semiarid rangeland; <br />Cover Type - Herbaceous -mixture of grass, weeds and brusl <br />Hydrologic Conditior <br />Poor <br />Soil Type <br />D <br />Curve Number <br />90 <br />RUN-OFF VOLUME - POND J <br />Precip <br />Direct <br />Run-off <br />Area Acres <br />Curve # <br />Amount <br />Run-off <br />Vol A -F <br />Disturbed 255 <br />74 <br />1 8 <br />026 <br />006 <br />Disturbed 944 <br />87 <br />1 8 <br />075 <br />059 <br />Disturbed 353 <br />70 <br />1 8 <br />017 <br />005 <br />Disturbed 1 14 <br />89 <br />1 8 <br />086 <br />008 <br />Disturbed 0.20 <br />98 <br />1 8 <br />1 58 <br />003 <br />Disturbed 218 <br />81 <br />1 8 <br />048 <br />009 <br />Coal Waste 20.64 <br />90 <br />1 8 <br />093 <br />1.59 <br />TOTAL 39.68 <br />249 <br />TOTAL REQUIRED WATER VOLUME - - A -F <br />2.49 <br />SEDIMENT VOLUME - Pond J <br />Use the universal soil loss equation <br />A=RKLSCP <br />R = rainfall factor <br />30.00 <br />K = soil erodibility factor - Work soil <br />037 <br />LS = combined length slope factor 2000'- 5% <br />023 <br />C = cropping management factor - Figure E <br />1 00 <br />P = erosion control practice factor <br />1.00 <br />A = sediment, tons/acre/yeas <br />255 <br />THREE YEAR SEDIMENT VOLUME - ACRE FEET <br />0.121 <br />39.68 ACRES-115#/CF <br />TOTAL REQUIRED SEDIMENT POND CAPACITY -- Al <br />2.61 <br />TR -105 Volume XI, App. B-4 09/15 <br />