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11/19/97 3:41:17 pm Barghausen Engineers page 1 <br />HOME BASE -- EVERETT, WA <br />FAMILY TREE DETENTION POND CALCULATIONS <br />( 5947-FTA <br />HYDROGRAPH SUMMARY <br />PEAK <br />TIME <br />VOLUME <br />HYD <br />RUNOFF <br />OF <br />OF <br />Contrib <br />NUM <br />RATE <br />PEAK <br />HYDRO <br />Area <br />cfs <br />min. <br />cf\AcFt <br />Acres <br />1~ <br />4.569 <br />480 <br />111376 cf <br />19.54 <br />2 <br />8.488 <br />480 <br />170536 cf <br />19.54 <br />3 <br />1.680 <br />980 <br />146434 cf <br />19.54 <br />4 <br />4.433 <br />480 <br />89004 cf <br />19.54 <br />5 <br />0.825 <br />980 <br />71497 cf <br />19.54 <br />