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9/26/9-1 8:0:4 am Barghausen Engineers page 4 HOME BASE -- EVERETT, WA FAMILY TREE DETENTION POND CALCULATIONS C5947-FT2+ ex.--xxxxxxxce��xxxxse=�x-aavcxxvaxxxxoxxsxo e==xxxxxecxxxxxssxe!: vxcx-= BASIN SUMMARY BASIN ID: I-5 SBUH METHODOLOGY TOTAL AREA.. .... RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: NAME: 25YR/24HR I-5 CORRIDOR RUNOFF 4.12 Acres BASEFLOWS: 0.00 cfs TYPElA PERV 2.70 inches AREA..: 2.75 Acres 10.00 min CN.... : 81.00 TC.... . 92.65 min ABSTRACTION COEFF: 0.20 IMP 1.37 Acres 98.00 20.09 min TcReach - Sheet L: 150.00 ns:0.8000 p2yr: 1.55 s:0.0200 TcReach - Shallow L: 500.00 ks:5.00 s:0.0100 TcReach - Channel L: 500.00 kc:42.00 s:0.0200 TcReach - Shallow L: 100.00 ks:27.00 s:0.0500 impTcReach - Sheet L: 100.00 ns:0.0310 p2yr: 1.55 s:0.0200 impTcReach - Shallow L: 500.00 ks:5.00 s:0.0100 impTcReach - Channel L: 500.00 kc:42.00 s:0.0200 impTcReach - Shallow L: 100.00 ks:27.00 s:0.0500 PEAK RATE: 0.85 cfs VOL: 0.53 Ac-ft TIME: 480 min BASIN ID: I-5/2YR NAME: 2YR/24HR I-5 CORRIDOR RUNOFF SBUH METHODOLOGY C TOTAL AREA.......: 4.12 Acres BASEFLOWS: 0.00 cfs TYPElA PERV IMP RAINFALL TYPE....: PRECIPITATION....: 1.55 inches AREA..: 2.75 Acres 1.37 Ac: TIME INTERVAL....: 10.00 min CN.... : 81.00 98.00 TC.... : 92.65 min 20.09 min ABSTRACTION COEFF: 0.20 R h - Sheet L• 150.00 ns:0.8000 p2yr: 1.55 s:0.02O0 Tc eac TcReach - Shallow L: 500.00 ks:5.00 s:0.0100 TcReach - Channel L: 500.00 kc:42.00 s:0.0200 TcReach - Shallow L: 100.00 ks:27.00 s:0.0500 impTcReach - Sheet L: 100.00 ns:0.0110 p2yr: 1.55 s:0.0200 impTcReach - Shallow L: 500.00 ks:5.00 s:0.0100 impTcReach - Channel L: 500.00 kc:42.00 s:0.0200 impTcReach - Shallow L: 100.00 ks:27.00 s:0.0500 PEAK RATE: 0.38 cfs VOL: 0.23 Ac-ft TIME: 480 min