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• Mr. Gary Schmitz <br /> June 21, 1995 <br /> Page Two <br /> 3. The plat does show a general storm drainage concept with catchbasins and small <br /> diameter pipe at low points which convey runoff, in some cases, to treatment ponds <br /> ultimately flowing to wetlands on the project site. Prior to final plat approval, the <br /> Developers should submit a detailed storm drainage plan including calculations on the <br /> treatment pond sizing and the total flow of runoff anticipated relative to the wetlands <br /> where it is expected to be stored. <br /> 4. The typical street section shown on the plan is incorrect. It indicates a total street <br /> width of 30 feet. The City requirement is 32 feet. This should be corrected to show <br /> an additional foot of width on each side of centerline. <br /> 5. The west end of 199th Avenue and the south end of Troy Street need to be provided <br /> with temporary cul-de-sacs for the turning of maintenance vehicles, school buses, and <br /> other types of large vehicles. Also, Troy Street to the north will need to be <br /> constructed beyond the plat boundaries to connect to existing Troy Street. <br /> 6. The preliminary plat should be revised to show drainage easements where appropriate <br /> around wetlands, treatment pond locations, or any other areas that storm drainage is <br /> • expected to flow. <br /> 7. Given the size of this development, an NPDES permit will be required. <br /> 8. On Lot 6 Block 4, there is an easement shown for the County Ditch 28 system which <br /> has some type of structure contained within it. If it can be clearly documented that <br /> the County draintile falls in this location, the building should be removed from the <br /> easement area. If it is unclear exactly where the draintile runs, perhaps it would be <br /> reasonable to allow the building there until work needs to be done in this area. <br /> However, if the building is not relocated, the owner should be put on notice that <br /> there is the potential that this will be required in the future. <br /> If you have any questions regarding any of these comments, please call. <br /> Sincerely, <br /> MSA, CONSULTING ENGINEERS <br /> Terry J. Maurer, P.E. <br /> • TJM:tw <br /> 230/270-2118.jun <br />