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<br />Western Auto, Roseville <br />Numbers are based on totally developed site. <br /> DETENTION POND DESIGN W. WALKER <br />ROW INPUT VARIABLE: UNITS INPUTS <br />3 Watershed Area acres 2.8 <br />4 Pervious Curve Number 93 <br />5 Impervious Fraction 0.8 <br />6 Design Storm inches 2.5 <br />7 <br />8 Maximum Depth feet 8 <br />9 Bench Width bc feet 3 <br />10 Bench Slope bc ftIft 3 <br />11 Side Slope ab ftIft 3 <br />12 <br />13 LengthlWidth Ratio 4 <br />14 Top Length c feet 250 <br />15 <br />16 OUTPUT VARIABLE: UNITS VALUE <br />17 Target Volume acre-ft 0.54970543 <br />18 Design Volume acre-ft 0.54853904 <br />19 <br />20 Design Mean Depth feet 3.05847814 <br />21 <br />22 Maximum Retention inches 0.75268817 <br />23 Design Storm Runoff inches 2.35588043 <br />24 Permanent Pool Volume acre- ft 0.54970543 <br />25 <br />26 TOP CONTOUR - c <br />27 Length c feet 250 <br />28 Width c feet 62.5 <br />29 Area c feet^ 2 7812.5 <br />30 <br />31 BENCH COUNTOUR - b <br />32 Depth b feet 1 <br />33 Length b feet 222.813227 <br />34 Width b feet 55.7033067 <br />35 Elevation b feet -1 <br />36 Area b feet^2 6205.71675 <br />37 <br />38 BOTTOM CONTOUR - a <br />39 Elevation a feet -8 <br />40 Slope Length ab feet 21 <br />41 Length a feet 32.505814 <br />42 Width a feet 8.12645351 <br />43 Area a feet^2 132.078493 <br />44 <br />45 Volume bc feet^ 3 6993.71003 <br />46 Volume ab feet^ 3 16900.6505 <br />47 Volume ac feet^3 23894.3605 <br />48 <br />49 Pond Volume acre-ft 0.54853904 <br />50 Mean Depth feet 3.05847814 <br />51 Pond Area acres 0.17935032 <br />