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12/9/02 4:11:24 pm Perteet Engineering, Inc page 3 <br /> Silver Lake Elementary <br /> Preliminary Drainage Design <br /> c Qa <br /> BASIN cSUMMARY <br /> BASIN ID: Bdev-002 NAME: predev 2yr-BSN A New PKG Lot <br /> SBUH METHODOLOGY <br /> TOTAL AREA • 0.29 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE TYPE1A PERV IMP <br /> PRECIPITATION • 1.70 inches AREA..: 0.10 Acres 0.19 Acres <br /> TIME INTERVAL 10.00 min CN • 86.00 98.00 <br /> TC • 5.00 min 5.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> PEAK RATE: 0.08 cfs VOL: 0.03 Ac-ft TIME: 480 min <br /> BASIN ID: Bdev-010 NAME: dev 10 yr-BSN B New PKG Lot <br /> SBUH METHODOLOGY <br /> TOTAL AREA • 0.29 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE TYPE1A PERV IMP <br /> PRECIPITATION • 2.30 inches AREA..: 0.10 Acres 0.19 Acres <br /> TIME INTERVAL 10.00 min CN • 86.00 98.00 <br /> TC 5.00 min 5.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> PEAK RATE: 0.11 cfs VOL: 6.04 Ac-ft TIME: 480 min <br /> BASIN ID: Bdev-100 NAME: dev 100 yr-BSN B New PKG Lot <br /> SBUH METHODOLOGY <br /> TOTAL AREA • 0.29 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE TYPE1A • PERV IMP <br /> PRECIPITATION • 3.20 inches AREA..: 0.10 Acres 0.19 Acres <br /> TIME INTERVAL 10.00 min CN • 86.00 98.00 <br /> TC 5.00 min 5.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> PEAK RATE: 0.17 cfs VOL: 0.06 Ac-ft TIME: 480 min <br /> BASIN ID: Bdev-6mo NAME: dev 6mo-BSN b New PKG Lot <br /> SBUH METHODOLOGY <br /> TOTAL AREA • 0.29 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE TYPE1A PERV IMP <br /> PRECIPITATION • 1.10 inches AREA..: 0.10 Acres 0.19 Acres <br /> TIME INTERVAL 10.00 min CN • 86.00 98.00 <br /> TC 5.00 min 5.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> PEAK RATE: 0.04 cfs VOL: 0.02 Ac-ft TIME: 480 min <br />