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<br />Emergency Spillway Size <br />Peak flow fora 25 yr 24 hr event of 2.8 inches in disturbed area is 14 <br />' cfs/inch of runoff <br />1.80 inches of runoff <br />25 cfs peak flow <br />25 cfs - 2.2 cfs = 22.8 cfs = Q <br />Weir Equation <br />Q = 3.087 L H3.2 <br />22.8 3.087 L H3/2 <br />L 10' <br />H = 0.82' <br />Riprap channel <br />Freeboard 2.18' <br /> <br />