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12/9/02 4:11:24 Pm Perteet Engineering, Inc page 1 <br />Silver Lake Elementary <br />Preliminary Drainage Design <br />BASIN SUTOARY <br />BASIN ID: Adev-002 NAME: predev 2yr-BSN A New PKG Lot <br />SBUH METHODOLOGY <br />TOTAL AREA.......: 1.65 Acres EASEFLOWS: 0.00 cfs <br />RAINFALL TYPE....: TYPElA PERV IMP <br />PRECIPITATION....: 1.70 inches AREA..: 0.29 Acres 1.36 Acres <br />TIME INTERVAL....: 10.00 min CH....: 06.00 98.00 <br />TC....: 5.00 min 5.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 0.50 CEs VOL: 0.18 AC-ft TIME: 480 min <br />BASIN I0: Adev-010 NAME: dev 10yr-BSN A New PKG Lot <br />SHUR METHODOLOGY <br />TOTAL AREA.......: 1.65 Acres DASEFLOWS: 0.00 efs <br />RAINFALL TYPE.....: TYPEIA PERV IMP <br />PRECIPITATION....: 2.30 inches AREA..: 0.29 Acres 1.36 Acres <br />TIME INTERVAL....: 10.00 min CN....: 86.00 90.00 <br />TC....: 5.00 min S.00 min <br />ABSTRACTION COBFF: 0.20 <br />PEAK RATE: 0.71 cfs VOL: 0.26 Ac-ft TIME: 480 min <br />BASIN I0: Adev-100 NAME: dev 100yr-BSN A New PKG Lot <br />SOUR METHODOLOGY <br />TOTAL AREA.......: 1.65 Acres BASEFLOWS: 0.00 cfs <br />RAINFALL TYPE....: TYPEIA PERV IMP <br />PRECIPITATION....: 3.20 inches AREA..: 0.29 Acres 1.36 Acres <br />TIME INTERVAL....: 10.00 min CH....: 86.00 90.00 <br />TC....: 5.00 min 5.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 1.02 cfs VOL: 0.38 AC-ft TIMF-: 400 min <br />BASIN ID: Adev-6m0 NAME: dev 6MO-BS14 A New PKG Lot <br />SOUR METHODOLOGY <br />TOTAL AREA.......: 1.65 Acres BASEFLOWS: 0.00 cfs <br />RAINFALL TYPE....: TYPEIA PERV IMP <br />PRECIPITATION....: 1.10 inches AREA..: 0.29 Acres 1.36 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: 0.29 cfs VOL! 0.11 Ac-ft TIME: 460 min <br />