12815 19TH AVE SE 2018-01-30 - Laserfiche WebLink

12/9/02 4:11:24 pm Perteet Engineering, Inc page 4 Silver Lake Elementary Preliminary Drainage Design BASIN SUMMARY BASIN ID: Bpre-002 NAME: predev 2 yr-BSN B New PKG Lot SBUH METHODOLOGY TOTAL AREA • 0.28 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION • 1.70 inches AREA. . : 0.28 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 76.00 0.00 TC • 15.48 min 0.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 100.00 ns:0.4000 p2yr: 1.70 s:0.1000 PEAK RATE: 0.01 cfs VOL: 0.01'Ac-ft TIME: 960 min BASIN ID: Bpre-010 NAME: predev 10 yr-BSN B New PKG Lot SBUH METHODOLOGY TOTAL AREA • 0.28 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION • 2.30 inches AREA. . : 0.28 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 76.00 0.00 TC • 15.48 min 0.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 100.00 ns:0.4000 p2yr: 1.70 2:0.1000 PEAK RATE: 0.02 cfs VOL: 0.01 Ac-ft TIME: 490 min BASIN ID: Bpre-100 NAME: predev 100 yr-BSN B New PKG Lo SBUH METHODOLOGY TOTAL AREA • 0.28 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION • 3.20 inches AREA..: 0.28 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 76,00 0.00 TC • 15.48 min 0.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 100.00 ns:0.4000 p2yr: 1.70 s:0.1000 PEAK RATE: 0.05 cfs VOL: 0.03 Ac-ft TIME: 480 min BASIN ID: C-N-WQ NAME: North Parking Lot for Extra WQ SBUH METHODOLOGY TOTAL AREA • 0.16 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION • 1.10 inches AREA.. : 0.00 Acres 0.16 Acres TIME INTERVAL 10.00 min CN 0.00 98.00 TC • 0.00 min 5.00 min ABSTRACTION COEFF: 0.20 PEAK RATE: 0.03 cfs VOL: 0.01 Ac-ft TIME: 480 min