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11/20/97 8:28:10 am Barghausen Engineers page 1 <br />Home Base Everett <br />Site detention calculations <br />5947site <br />---------------------------- <br />BASIN SUMMARY <br />BASIN ID: post06mo <br />SBUH METHODOLOGY <br />TOTAL AREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />NAME: 6mo/24hr post -developed <br />7.64 Acres <br />TYPEIA <br />0.99 inches <br />10.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 1.16 cfs VOL: <br />BASIN ID: post25yr <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 />0.98 Acres <br />86.00 <br />11.28 min <br />0.45 AC-ft TIME: 480 min <br />NAME: 25yr/24hr post -developed <br />7.64 Acres <br />TYPElA <br />2.70 inches <br />10.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 3.80 cfs VOL: <br />BASIN ID: post2yr <br />SBUH METHODOLOGY <br />TOTALAREA........ <br />RAINFALL TYPE....: <br />PRECIPITATION....: <br />TIME INTERVAL....: <br />BASEFLOWS: <br />AREA... <br />CN... .. <br />TC.... . <br />0.00 cfs <br />PERV <br />0.98 Acres <br />86.00 <br />11.28 min <br />1.49 Ac-ft TIME: 480 min <br />NAME: 2yr/24hr post -developed <br />7.64 Acres <br />TYPElA <br />1.55 inches <br />10.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 2.02 cfs VOL <br />BASIN ID: pre2yr <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 />0.98 Acres <br />86.00 <br />11.28 min <br />0.78 Ac-ft TIME: 480 min <br />NAME: 2yr/24hr predeveloped <br />7.64 Acres <br />TYPElA <br />1.55 inches <br />10.00 min <br />ABSTRACTION COEFF: 0.20 <br />PEAK RATE: 0.14 cfs VOL: <br />BASEFLOWS: <br />AREA... <br />CN..... <br />TC..... <br />0.00 cfs <br />PERV <br />7.64 Acres <br />79.00 <br />109.26 min <br />0.18 Ac-ft TIME: 960 min <br />IMP <br />6.66 Acres <br />98.00 <br />11.28 min <br />IMP <br />6.66 Acres <br />98.00 <br />11.28 min <br />IMP <br />6.66 Acres <br />98.00 <br />11.28 min <br />IMP <br />0.00 Acres <br />0.00 <br />0.00 min <br />