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HENDEL HOMES <br /> LOT 3, BLOCK 1, MOONEY LAKE PRESERVE <br /> WEST RAIN GARDEN CALCULATIONS <br /> October 11, 2017 <br /> Proposed hardcover = 10,800 SF <br /> 10,800 SF X 1" runoff_ 12'71' = 908 CF required <br /> Proposed rain garden = 1200 CF <br /> ELEV(FT) AREA(SF) VOL(CF) <br /> 996 2600 <br /> > 1200 <br /> 995.5 2200 <br /> Drawdown = 6" -0.2 in/hr for C soils = 30 hours <br /> f;RONBERG Si.ASSOCIATES.INC. <br /> 445 N.WILLOW DR <br /> LONG LAKE,MN 55356 <br />