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9/18/95 Barghausen Engineers page 1 <br />Mc DONALDS, EVERETT WA. <br />WOOD CREEK DETENTION BASIN CALCULATION <br />BCE # 5449, COMP. FILE # 5449 MAC <br />------------- <br />BASIN SUMMARY <br />BASIN ID: Al <br />NAME: 2YR 24HR PRE-DEV <br />SBUH METHODOLOGY <br />TOTAL AREA.......: <br />0.95 Acres <br />BASEFLOWS: <br />0.00 <br />cfs <br />RAINFALL TYPE....: <br />TYPEIA <br />PERVIOUS AREA <br />PRECIPITATION....: <br />1.55 inches <br />AREA..: <br />0.95 <br />Acres <br />TIME INTERVAL....: <br />10.00 min <br />CN....: <br />85.00 <br />TIME OF CONC.....: <br />48.48 min <br />IMPERVIOUS <br />AREA <br />ABSTRACTION COEFF: <br />0.20 <br />AREA..: <br />0.00 <br />Acres <br />CN... <br />98.00 <br />TcReach - Sheet <br />L: 236.00 ns:0.4000 p2yr: 1.55 <br />s:0.0360 <br />PEAK RATE: 0.04 <br />cfs VOL: 0.04 <br />Ac-ft TIME: <br />540 <br />min <br />BASIN ID: B1 <br />SBUH METHODOLOGY <br />TOTAL AREA.. .... <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />TIME OF CONC.....: <br />ABSTRACTION COEFF: <br />NAME: 25YR 24HR POST-DEV <br />0.95 Acres <br />TYPElA <br />2.70 inches <br />10.00 min <br />6.30 min <br />0.20 <br />PEAK RATE: 0.48 cfs VOL: 0.18 <br />BASIN ID: Cl <br />SBUH METHODOLOGY <br />TOTAL AREA.. .... <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />TIME OF CONC.....: <br />ABSTRACTION COEFF: <br />BASEFLOWS: 0.00 cfs <br />PERVIOUS AREA <br />AREA..: 0.18 Acres <br />CN.. 86.00 <br />IMPERVIOUS AREA <br />AREA..: 0.77 Acres <br />CN.. 98.00 <br />Ac-ft TIME: 480 min <br />NAME: 6M0 24HR POST-DEV TO WETPOND <br />0.95 Acres <br />TYPElA <br />0.99 inches <br />10.00 min <br />6.30 min <br />0.20 <br />PEAK RATE: 0.14 cfs VOL: 0.05 <br />BASEFLOWS: 0.00 cfs <br />PERVIOUS AREA <br />AREA..: 0.18 Acres <br />CN.. 86.00 <br />IMPERVIOUS AREA <br />AREA..: 0.77 Acres <br />CN.. 98.00 <br />Ac-ft TIME: 480 min <br />