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POND CAPACITY: <br />-3.6 Acres x 43,560 = 156,816 FT2 <br />CONCLUSION: <br />-A 100 year rain or 4 of rain distributed over the entire undeveloped <br />site would raise the pond about .67 feet (8 inches). <br />-29 x 43,560 x 4/12 x .25 = 104,217 FT3/156,816 = .67 feet. <br />-A 100 year rain or 4" of rain distributed over the entire, totally <br />developed site would raise the pond about 1.31 feet (1' -4 "). <br />- 204,816 FT3/156,816 = 1.31 feet. <br />-The net increase effect on the pond elevation contributed by the max- <br />imum developement of site for a 100 year rain is about .64 feet or 72 <br />inches. <br />-1.31 feet - .67 feet = .64 feet or 71/2 inches. <br />-The lower floor elevation (910.0) is located nineteen feet above the <br />existing pond elevation of 891. The pond will naturally spill out to <br />the South -east if the surface elecation reaches elevation 897. A <br />culvert will be placed below the main entrance drive allowing the sur- <br />face run -off over the 897 elevation to reach the existing culvert which <br />extends under State Highway 36 to the South -east. <br />-The 897 spillway could be equiped with a run -off control device if <br />required sometime in the future. <br />CERTIFICATION: <br />I hereby certify that this plan, specification or report was prepared by me <br />or under my direct supervision and that I am duly registered Architect <br />under the laws of the state of Minnesota. <br />DATE: DeAinr 1 -WAS <br />44. IP Is <br />SIGNATURE: <br />REGISTER NO. 10239 <br />