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9/26/97 8:0:4 am Barghausen Engineers page 1 <br />HOME BASE -- EVERETT, WA <br />FAMILY TREE DETENTION POND CALCULATIONS <br />5947-FTA <br />BASIN SUMMARY <br />BASIN ID: 16TH/2YR <br />NAME: 2YR/24HR 16TH AVE SE RUNOFF <br />SBUH METHODOLOGY <br />TOTAL AREA.......: <br />0.68 Acres <br />BASEFLOWS: <br />0.00 cfs <br />RAINFALL TYPE....: <br />TYPElA <br />PERV <br />IMP <br />PRECIPITATION....: <br />1.55 inches <br />AREA..: <br />0.00 Acres <br />0.68 Acres <br />TIME INTERVAL....: <br />10.00 min <br />CN.... : <br />0.00 <br />98.00 <br />TC.... : <br />0.00 min <br />10.00 min <br />ABSTRACTION COEFF: <br />0.20 <br />PEAK RATE: 0.20 cfs <br />VOL: 0.08 <br />Ac-ft TIME: 480 min <br />BASIN ID: 2YR-APT <br />NAME: 2YR/24HR FAMILY <br />TREE APTS <br />SBUH METHODOLOGY <br />TOTAL AREA.......: <br />6.90 Acres <br />BASEFLOWS: <br />0.00 cfs <br />RAINFALL TYPE....: <br />TYPEIA <br />PERV <br />IMP <br />PRECIPITATION....: <br />1.55 inches <br />AREA..: <br />1.20 Acres <br />5.70 Acres <br />TIME INTERVAL....: <br />10.00 min <br />CN.... : <br />86.00 <br />98.00 <br />TC.... : <br />15.07 min <br />15.07 min <br />ABSTRACTION COEFF: 0.20 <br />TcReach - Sheet L: 50.00 ns:0.1500 p2yr: 1.55 s:0.0100 <br />TcReach - Sheet L: 100.00 ns:0.0110 p2yr: 1.55 s:0.0100 <br />TcReach - Channel L: 750.00 kc:42.00 s:0.0200 <br />impTcReach - Sheet L: 50.00 ns:0.1500 p2yr: 1.55 s:0.0100 <br />impTcReach - Sheet L: 100.00 ns:0.0110 p2yr: 1.55 s:0.0100 <br />impTcReach - Channel,L: 750.O0.k6:42.00 s:0.0200 <br />PEAK RATE: 1.67 cfs VOL:' 0.68 Ac-ft TIME: 480 min <br />BASIN ID: 2YR-STOR <br />SBUH METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />NAME: 2YR/24HR MINI STORAGE RUNOFF <br />2.40 Acres <br />TYPElA <br />1.55 inches <br />10.00 min <br />BASEFLOWS: <br />AREA... <br />CN..... <br />TC..... <br />0.00 cfs <br />PERV <br />0.12 Acres <br />86.00 <br />10.00 min <br />ABSTRACTION COEFF: 0.2n <br />TcReach - Sheet L: 100.00 ns:0.0110 p2yr: 1.55 <br />TcReacL - Shallow L: 100.00 ks:27.00 s:0.0100 <br />TcReach - Channel L:1000.00 kc:42.00 s:0.0050 <br />impTcReach - Sheet L: 100.00 ns:0.0110 p2yr: 1 <br />impTcReach - Shallow L: 100.00 ks:27.00 s:0.0100 <br />impTcReach - Channel L:1000.00 kc:42.00 s:0.0050 <br />PEAK RATE: 0.68 cfs VOL: 0.26 Ac-ft TIME: <br />C <br />s:0.0100 <br />IMP <br />2.28 Acres <br />98.00 <br />10.00 min <br />55 s:0.0100 <br />480 min <br />