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6/17/96 page 2 <br />Bowie No. 2 Mine <br />• Coal Waste Bank <br />1.8-inch 10-Year, 24-Hour Storm Event <br />BASIN SUMMARY <br />BASIN ID: A3a <br />SCS METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />NAME: EAST NAT GRND ABOVE PILE <br />1.11 Acres <br />TYPE2 <br />1.80 inches <br />5.00 min <br />BASEFLOWS: <br />AREA... <br />CN..... <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 0.80 cfs VOL: <br />BASIN ID: A3b <br />SCS METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />TC..... <br />0.00 cfs <br />PERV <br />1.11 Acres <br />83.00 <br />2.00 min <br />0.05 Ac-ft TIME: 730 min <br />NAME: WEST NAT GRND ABOVE PILE <br />1.11 Acres <br />TYPE2 <br />1.80 inches <br />5.00 min <br />BASEFLOWS: <br />AREA... <br />CN..... <br />TC..... <br />0.00 cfs <br />PERV <br />1.11 Acres <br />83.00 <br />2.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 0.80 cfs VOL: <br />• BASIN ID: A4a <br />SCS METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />0.05 Ac-ft TIME: 730 min <br />NAME: w. nat wtrshed to diversion <br />9.20 Acres <br />TYPE2 <br />1.80 inches <br />5.00 min <br />BASEFLOWS: <br />AREA... <br />CN..... <br />TC..... <br />0.00 cfs <br />PERV <br />9.20 Acres <br />83.00 <br />10.88 min <br />ABSTRACTION COEFF: 0.20 <br />TcReach - Shallow L:2100.00 ks:5.00 s:0.5900 <br />TcReach - Channel L: 300.00 kc:20.00 s:0.0200 <br />PEAK RATE: 6.25 cfs VOL: 0.42 Ac-ft TIME: 735 min <br />BASIN ID: A4b <br />SCS METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />NAME: e. nat wtrshed to diversion <br />9.20 Acres <br />TYPE2 <br />1.80 inches <br />5.00 min <br />BASEFLOWS: <br />AREA... <br />CN..... <br />TC..... <br />0.00 cfs <br />PERV <br />9.20 Acres <br />83.00 <br />10.90 min <br />ABSTRACTION COEFF: 0.20 <br />TcReach - Shallow L:2100.00 ks:5.00 s:0.5900 <br />TcReach - Channel L: 480.00 kc:20.00 5:0.0500 <br />PEAK RATE: 6.26 cfs VOL: 0.42 Ac-ft TIME: <br />• <br />735 min <br />IMP <br />0.00 Acres <br />0.00 <br />0.00 min <br />IMP <br />0.00 Acres <br />0.00 <br />0.00 min <br />IMP <br />0.00 Acres <br />0.00 <br />o.oo min <br />IMP <br />0.00 Acres <br />0.00 <br />0.00 min <br />ADYgUACY-O1 <br />