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9/26/97 8:0:4 am Barghausen Engineers <br />HOME BASE -- EVERETT, WA <br />FAMILY TREE DETENTION POND CALCULATIONS <br />5947-FTA <br />BASIN ID: OFFICE2 <br />SBUH METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />--------------------- <br />BASIN SUMMARY <br />NAME: 25YR/24HR SILVER LK PROF CTR <br />4.34 Acres <br />TYPElA <br />1.55 inches <br />10.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 1.19 cfs VOL: <br />BASIN ID: OFFICE25 <br />SBUH METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />BASEFLOWS: <br />fi;T_0T1 <br />CN.... . <br />TC.... . <br />0.00 cfs <br />PERV <br />0.43 Acres <br />86.00 <br />10.00 min <br />0.45 Ac-ft TIME: 480 min <br />page 5 <br />NAME: 25YR/24HR SILVER LK PROF CTR <br />4.34 Acres <br />TYPElA <br />2.70 inches <br />10.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 2.22 cfs VOL: <br />BASIN ID: PRE -.APT <br />SBUH METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />BASEFLOWS: <br />AREA... <br />CN.... . <br />TC.... . <br />0.00 cfs <br />PERV <br />0.43 Acres <br />86.00 <br />10.00 min <br />0.85 AC-ft TIME: 480 min <br />NAME: 2YR/24HR FAMILY TREE APTS <br />6.90 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 />6.90 Acres <br />83.00 <br />78.50 min <br />ABSTRACTION COEFF: 0.20 <br />TcReach - Sheet L: 300.00 ns:0.4000 p2yr: 1.55 s:0.0250 <br />TcReach - Shallow L: 500.00 ks:5.00 s:0.0250 <br />PEAK RATE: 0.20 cfs VOL: 0.23 Ac-ft TIME: 660 min <br />BASIN ID: PRE100TH <br />SBUH METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />NAME: 2YR/24HR 100TH STREET R/W <br />1.10 Acres <br />TYPElA <br />1.55 inches <br />10.00 min <br />BASEFLOWS: <br />""I �# 1W <br />CN.... . <br />TC.... . <br />0.00 cfs <br />PERV <br />1.10 Acres <br />83.00 <br />49.57 min <br />ABSTRACTION COEFF: 0.20 <br />TcReach - Sheet L: 150.00 ns:0.4000 p2yr: 1.55 s:0.0250 <br />TcReach - Shallow L: 500.00 ks:5.00 s:0.0250 <br />PEAK RATE: 0.04 cfs VOL: 0.04 Ac-ft TIME: 540 min <br />IMP <br />3.91 Acres <br />98.00 <br />10.00 min <br />IMP <br />3.91 Acres <br />98.00 <br />10.00 min <br />IMP <br />0.00 Acres <br />0.00 <br />0.00 min <br />IMP <br />0.00 Acres <br />0.00 <br />0.00 min <br />