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12/9/02 4:11:24 pm Perteet Engineering, Inc page 2 <br /> Silver Lake Elementary <br /> Preliminary Drainage Design <br /> _= BASIN SUMMARY <br /> BASIN ID: Apre-002 NAME: predev 2yr-BSN A New PKG Lot <br /> SBUH METHODOLOGY <br /> TOTAL AREA • 1.65 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE TYPE1A PERV IMP <br /> PRECIPITATION • 1.70 inches AREA..: 1.65 Acres 0.00 Acres <br /> TIME INTERVAL 10.00 min CN • 76.00 0.00 <br /> TC • 44.01 min 0.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> TcReach - Sheet L: 275.00 ns:0.4000 p2yr: 1.70 s:0.0570 <br /> TcReach - Channel L: 110.00 kc:17..00 x:0.0500 <br /> PEAK RATE: 0.03 cfs VOL: 0.04 Ac-ft TIME: 960 min <br /> BASIN ID: Apre-010 NAME: predev l0yr-BSN A New PKG Lot <br /> SBUH METHODOLOGY <br /> TOTAL AREA • 1.65 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE TYPE1A PERV IMP <br /> PRECIPITATION • 2.30 inches AREA. .: 1.65 Acres 0.00 Acres <br /> TIME INTERVAL 10.00 min CN • 76.00 0.00 <br /> TC • 44.01 min 0.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> TcReach - Sheet L: 275.00 ns:0.4000 p2yr: 1.70 8:0.0570 <br /> TcReach - Channel L: 110.00 kc:17.00 0:0.0500 <br /> PEAK RATE: 0.08 cfs VOL: 0.08' Ac-ft TIME: 540 min <br /> BASIN ID: Apre-100 NAME: predev 100yr-BSN A New PKG Lot <br /> SBUH METHODOLOGY <br /> TOTAL AREA • 1.65 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE TYPE1A PERV IMP <br /> PRECIPITATION • 3.20 inches AREA.. : 1.65 Acres 0.00 Acres <br /> TIME INTERVAL 10.00 min CN • 76.00 0.00 <br /> TC • 44.01 min 0.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> TcReach - Sheet L: 275.00 nB:0.4000 p2yr: 1.70 0:0.0570 <br /> TcReach - Channel L: 110.00 kc:17.00 x:0.0500 <br /> PEAK RATE: 0.20 cfs VOL: 0.16 Ac-ft TIME: 490 min <br /> L <br />