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10/24/96 page 3 <br /> SANBORN CREEK MINE <br /> COAL WASTE HANK DESIGN <br /> 2.0-INCH 10 YEAR, 24 HOUR STORM EVENT <br /> <br /> BASIN SUMMARY <br /> BASIN ID: A6a NAME: WEST COAL FACE <br /> SCS METHODOLOGY <br /> TOTAL AREA.......: 1.08 Acree BASEFLOW9: 0.00 c!a <br /> RAINFALL TYPE....: TYPE1 DERV IMP <br /> PRECIPITATION....: 2.00 inches AREA..: 1.08 Acres 0.00 Acres <br /> TI!ffi INTERVAL....: 5.00 min CN....: 90.00 0.00 <br /> TC..... 2.00 min 0.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> TcReach - Shallow L: 280.00 ks:17.00 s:0.5000 <br /> PEAR RATE: 1.57 c!~ VOL: 0.10 Ac-!t TIME : 770 min <br /> BASIN ID: A6b NAME: EAST COAL PACE <br /> SC$ METHODOLOGY <br /> TOTAL AREA.......: 1.08 Acres BASEPLOWB: 0.00 c!s <br /> RAINFALL TYPE....: TYPE2 PERV I1~ <br /> PRECIPITATION....: 2.00 inches AREA..: 1.08 Acras 0.00 Aeras <br /> TIME INTERVAL....: 5.00 min CN....: 90.00 ~ 0.00 <br /> TC....: 2.00 min 0.00 min <br /> ABSTRACTION COSFF: 0.20 ' <br /> TcReach - Shallow L: 280.00 ks:17.00 e:0.500O <br /> PEAR RATE: 1.57 c!s VOL: 0.10 Ac-Lt TIME: 730 min <br />/"`~ <br />. <br />BASIN ID: A7 <br />NAMB: DRAIANGE TO POND DIVERSION <br /> SCS METHODOLOGY <br />• TOTAL AREA.......: 0.65 Acres BASEPIAWS: 0.00 c!s <br /> RAINFALL TYPE....: TYPE2 PERV IMP <br /> PRECIPITATION....: 2.00 inches AREA..: 0.65 Acres 0.00 Acres <br /> TIKE INTERVAL....: 5.00 min CN....: 63.00 0.00 <br /> TC....: 2.00 min 0.00 min <br /> ABSTRACTION COSFF: 0.20 <br /> TcReach - Shallow L: 200.00 ks:S.00 6:0.4100 <br /> PEAK RATE: 0.01 cfs VOL: 0.01 Ac-!t TIME: 740 min <br />1 <br />• <br />