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r �� � <br /> 3850 Watertown Road 1/6/15 <br /> Orono MN MWT <br /> Drainaqe Area <br /> Total Area to Low Area = 895,990 sf <br /> Impervious = 76,065 sf <br /> Gravel = 19,840 sf <br /> Pasture/grass land = 580,fi35 sf <br /> Wooded Area = 87,908 sf <br /> Grass Area Soil Type C = 131,542 sf <br /> See attached Drainage Area Map for More Details. Drainage area information <br /> obtained from Hennepin County 2011 LiDar data and aeria! photography. <br /> Existinq Conditions <br /> Existing Low Area <br /> Elevation Head Area (sq.ft.) Area (acres} Delta V(acre-feet) Volume(acre-feet) <br /> 995.8 0 4306 0.0989 0.0000 <br /> 4.0217 <br /> 996 0.2 5158 0.1184 0.0217 <br /> 0.7752 <br /> 998 2.2 32539 0.7470 0.7969 <br /> 2.8435 <br /> 1000 4.2 97056 2.2281 3.6404 <br /> 5.3295 <br /> 1002 6.2 136204 3.1268 8.9700 <br /> 7.7077 <br /> 1004 8.2 201680 4.6299 16.6777 <br /> *See attached Existing Conditions Map for More Detaiis. Existi.ng Conditions <br /> based on plan pravided by Gronberg and Associates dated 12-10-14. <br /> Stormwater Management Calculations <br />