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I ^ <br />3 <br />iZi <br />32 <br />33 <br />34 <br />35 <br />Time (Min.)Inflow (CFS) <br />15.5 <br />16.0 <br />16.5 <br />17.0 <br />1.84 <br />1.58 <br />1.32 <br />1.05 <br />Storage (Ft3) <br />A 45/10,152.3 <br />A 37.2/10,189.5 <br />A 29.1/10,218.6 <br />^ 21.3/10,239.9 <br />Outflow (CFS) <br />0.60 <br />0.61 <br />0.61 <br />0.61 PEAK <br />B.Approximate Area of Lot 2 ■ 4.0 acres ■ 174,240 <br />Area Draining to Lake Minnetonka before construction <br />Area Draining to Lake Minnetonka after construction <br />163,964 ft.2 <br />3.8 acres <br />136,720 ft.2 <br />3.1 acres <br />I. Original Runoff to Lake from Lot <br />Cbefore ■ 0.35 <br />Qbefore - (0.35)(9.3)(3.8) - 12.4 CFS <br />II. New Runoff Factor: <br />8200 ft2 <br />12,660 ft2 <br />1657 ft2 <br />Driveway: <br />House roof: <br />Brick Areas (patio & <br />Planting wall) <br />Concrete Sidewalk: 761 ft2 <br />Remaining Ar«a: 113,442 ft2 <br />X <br />X <br />X <br />0.9 <br />1.0 <br />1.0 <br />7390 <br />12660 <br />1657 <br />1.0 <br />0.35 <br />136,720 ft2 <br />X <br />X <br />x“0.45 <br />761 <br />39705 <br />62,163 <br />III. New Runoff - (0.45)(9.3)(3.1) - 13 CFS <br />C. Summary <br />The Ulrich property (Lot 2, Lydiards Park) drains in two directions, one to the <br />west directly to Lake Minnetonka, one to the south to an crristing pond. The <br />increase in runoff to the pond from added rooftop and blacktop would result in <br />the pond rising a small amount (0.4 feet) in a 100 year storm. The runoff <br />directly to the lake to the west increases 5% from 12.4 CFS to 13.0 CFS due to <br />additional rooftop and blacktop in that drainage area. <br />r \w <br />i <br />! <br />i