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12/9/02 4:11:24 pm Perteet Engineering. Inc page 4 <br />Silver Lake Elementary <br />Preliminary Drainage Design <br />......a._._._...__'-" ................. �________...=__".n.__"_______ <br />-----_- BASIN SUMMARY <br />BASIN ID: Bpre-002 <br />NA14E: predev 2 yr-BSH B <br />New PKG Lot <br />SBUH METHODOLOGY <br />TOTAL AREA.......: <br />0.28 Acres <br />BASEFLOWS: <br />0.00 cfs <br />RAIUFALL TYPE....: <br />TYPElA <br />PERV <br />IMP <br />PRECIPITATION....: <br />1.70 inches <br />ARM, .: 0.28 <br />Acres <br />0.00 Acres <br />TIME INTERVAL....: <br />10.00 min <br />CII....; 76.00 <br />0.00 <br />TC....: 15.48 <br />min <br />0.00 min <br />ABSTRACTION COEFF: <br />0.20 <br />TcReach - Sheet <br />L: 100.00 ns:0.4000 <br />p2yr: 1.70 <br />3:0.1000 <br />PEAK RATE: 0.01 <br />cfn VOL: 0.01 <br />Ac-ft TIME: <br />960 min <br />BASIN ID: Bpre-010 <br />NAME: predev 30 yr-BSN B <br />New PKG Lot <br />SBU11 METHODOLOGY <br />TOTAL AREA.......: <br />0.28 Acres <br />BASEFLOWS: <br />0.00 cfs <br />RAINFALL TYPE .... <br />TYPElA <br />PERV <br />IMP <br />PRECIPITATION.. .. <br />2.30 inches <br />AREA..: 0.20 <br />Acres <br />0.00 Acres <br />TIME INTERVAL... <br />10.00 min <br />CN....: 76.00 <br />0.00 <br />TC....: 15.48 <br />min <br />0.00 min <br />ABSTRACTION COEFF: <br />0.20 <br />TcReach - Sheet <br />L: 100.00 ns:0.4000 p2yr: 1.70 <br />11:0.1000 <br />PEAK RATE: 0.02 <br />CIS VOL: 0.01 <br />AC-ft TIME: <br />490 min <br />BASIN ID: Bpre-100 <br />NAME: predev 100 yr-BSN <br />B New PKG Ls <br />SBUH METHODOLOGY <br />TOTAL AREA.......: <br />0.28 Acres <br />BASEFLOWS: <br />0.00 cfs <br />RAINFALL TYPE....: <br />7YPEIA <br />PERV <br />IMP <br />PRECIPITATION....: <br />3.20 inches <br />AREA..: 0.28 <br />Acres <br />0.00 Acres <br />TIPIE INTERVAL....: <br />10.00 min <br />CN....: 76.00 <br />0.00 <br />TC....: 1S.40 <br />min <br />0.00 min <br />ABSTRACTION COEFF: <br />0.20 <br />TcReach - Sheet <br />L. 100.00 ns:0.4000 p2yr: 1.70 <br />s:0.1000 <br />PEAK RATE: 0.05 <br />cfs VOL: 0.03 <br />AC-ft TIME: <br />480 min <br />BASIN ID: C-N-41Q <br />NAME: North <br />Parking Lot for Extra WQ <br />SBUH METHOCOLOGY <br />TOTAL AREA.......: <br />0-16 Acres <br />BASEFLOWS <br />0.00 cfs <br />RAINFALL TYPE....: <br />TYPElA <br />PERV <br />IMP <br />PRECIPITATION..... <br />1.10 inches <br />AREA..: 0.00 <br />Acres <br />0.16 Acres <br />TIME INTERVAL....: <br />10.00 min <br />CN....: 0.00 <br />98.00 <br />TC....; 0.00 <br />min <br />5.00 mill <br />ABSTRACTION COEFF: <br />0.20 <br />PEAK RATE: 0.03 <br />cfs VOL: 0.01 <br />Ac-ft TIME: <br />480 min <br />