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12/9/02 4:11,24 Pm Pereeet Engineering, Inc page 3 <br />Silver Lake Elementary <br />Preliminary Drainage Design <br />BASIN SUMMARY <br />BASIN ID. Bdev-002 NAME; predev 2yr-13SN A New PKG Lot <br />SBUH METHODOLOGY <br />TOTAL AREA.......: 0.29 Acres BASEFLOWS: 0.00 cfs <br />RAINFALL TYPE....: TYPEIA PERV IMP <br />PRECIPITATION....: 1.70 inches AREA..: 0.10 Acres 0.19 Acres <br />TIME INTERVAL....: 10.00 min C.-I....: 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 tE9 <br />RAINFALL TYPE....: TYPEIA PERV IMP <br />PRECIPITATION....: 2.30 inches AREA..: 0.10 Acres 0.19 Acres <br />11ME INTERVAL....: 10.00 min CH....: 86.00 98.00 <br />TC....: 5.00 min 5.00 min. <br />ABSTRACTION COBPF: 0.20 <br />PEAK RATE: 0.11 CIS VOL: 0.04 Ac-ft TIME: 480 min <br />BASIN ID: Bdev-100 NAME: dev 100 yr-BSN D New PKG Lot <br />SBUH METHODOLOGY <br />TOTAL AREA... 0.29 Acres BASEFLOWS: 0.00 cfs <br />RAINFALL TYPE....: TYPEIA PERV IMP <br />PRECIPITATION....: 3.20 inches AREA..: 0.10 Acres 0.19 Acres <br />TIME INTERVAL... 10.00 min CN....: 86.00 90.00 <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 cfe <br />RAINFALL TYPE....: TYPEIA 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 />