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rr <br /> Howard R. Green Company <br /> L CONSULTING ENGINEERS <br /> November 18, 1999 <br /> File: 808540J-0240 <br /> Mr. Steve Wensman <br /> City of Elk River <br /> 13065 Orono Parkway <br /> Elk River, MN 55330 <br /> RE: WINDSOR PARK DEVELOPMENT <br /> Dear Mr. Wensman: <br /> As requested we have reviewed the submittal package for the Windsor Park Development. The <br /> package consisted of a preliminary plat, preliminary grading plan, preliminary road grades, <br /> preliminary landscape plan with tree preservation limits, preliminary sewer collection disposal <br /> plan, storm drainage calculations and on-site sewer treatment preliminary evaluation. Based on <br /> . our review we would offer the following comments: <br /> A. Preliminary Plat <br /> 1. The side yard easement between Lots 5 and 6, Block 4 should be increased to 20 feet to <br /> accommodate the storm sewer pipe that is proposed in this location. <br /> 2. There are a number of areas where the grading plan indicates that natural drainage will <br /> flow across lots not within the prescribed drainage and utility easements. In these <br /> locations additional easements need to be provided on the plat to accommodate this <br /> drainage. Examples of this would be the rear yard of the lots within Block 2 and Block 4 <br /> of the plat. There is also drainage through areas not covered by easements and Lots 3 <br /> and 4 and Lot 7 of Block 1. <br /> B. Preliminary Grading and Drainage Plan <br /> 1. There are a few house elevations that would indicate rather flat driveways, these should <br /> be reviewed. They include Lots 3 and 8, Block 1, Lot 3, Block 4, also Lot 3 Block 2 and <br /> Lot 2, Block 4 have relatively flat areas behind the homes. <br /> 2. It is difficult to see how drainage will be contained within side yard easements in Block 3 <br /> where minimal is proposed. <br /> 3. There is approximately 600 feet of street drainage that flows to County Road 1 at the <br /> intersection of 212th Avenue and County Road 1. There is a culvert under the road with <br /> spill ways proposed. It would provide for better drainage if small catchbasins were <br /> installed on this culvert to pick up the street drainage and deposit in the County ditch. <br /> • <br /> \\SPNWFS\VOL1\DATA\PROJ\808540j\Itr 11-18-99 wensman.doc <br /> 1326 Energy Park Drive • St. Paul, MN 55108 • 651/644-4389 fax 651/644-9446 toll free 888/368-4389 <br />