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9/26/97 8:0:4 am <br />Barghausen Engineers <br />page 6 <br />HOME BASE -- EVERETT, WA <br />/ FAMILY TREE DETENTION <br />POND CALCULATIONS <br />5947-FTA <br />---------- ----- ---- <br />BASIN SUMMARY <br />BASIN ID: PREI6TH <br />NAME: 2YR/24HR PREDEV 16TH AVE SE <br />SBUH METHODOLOGY <br />TOTAL AREA.......: <br />0.68 Acres BASEFLOWS: 0.00 cfs <br />RAINFALL TYPE....: <br />TYPE1A PERV <br />IMP <br />PRECIPITATION....: <br />1.55 inches AREA..: 0.68 Acres <br />0.00 Acres <br />TIME INTERVAL....: <br />10.00 min CN.... : 81.00 <br />0.00 <br />TC.... . 42.52 min <br />0.0b min <br />ABSTRACTION COEFF: 0.20 <br />TcReach - Sheet L: 100.00 ns:0.4000 p2yr: 1.55 s:0.0200 <br />TcReach - Shallow L: 350.00 ks:5.00 s:0.0100 <br />PEAR RATE: 0.02 cfs VOL: 0.02 Ac-ft TIME: 550 min <br />BASIN ID: STORAGE NAME: 25YR/24HR MINI STORAGE RUNOFF <br />SBUH METHODOLOGY <br />TOTAL AREA.......: 2.40 Acres BASEFLOWS: 0.00 cfs <br />RAINFALL TYPE....: TYPE1A PERV IMP <br />PRECIPITATION....: 2.70 inches AREA..: 0.12 Acres 2.28 Acres <br />TIME INTERVAL....: 10.00 min CN.... : 86.00 98.00 <br />TC.... : 10.00 min 10.00 min <br />ABSTRACTION COEFF: 0.20 <br />TcReach - Sheet L: 100.00 ns:0.0110 p2yr: 1.55 s:0.0300 <br />TcReach - Shallow L: 100.00 ks:27.00 s:0.0100 <br />TcRea--h - Channel L:1000.00 kc:42.00 s:0.0050 <br />impTcReach - Sheet L: 300.00.ns:0.0110 p2yr: 1.55 s:0.0100 <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: 1.26 cfs VOL: 0.48 Ac-ft TIME: 480 min <br />