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• Howard R. Green Comcany CONSULTING ENGINEERS March 15, 1999 File: 806510J-0240 The Honorable Chairman and Planning Commission City of Elk River 13065 Orono Parkway P.O. Box 490 Elk River, MN 55330-0490 RE: GOPHER STATE MINI STORAGE EXPANSION Dear Planning Commission Members: As requested, we have reviewed the plan for the proposed expansion of the Gopher State Mini Storage facility. This site is located in the McChensey Industrial Park. The plan we reviewed was prepared by D'Heilly Engineering & Associates, Inc. It consisted of two sheets, a site plan • and a grading and erosion control plan. Based on our review and comments received at the staff review meeting, we would offer the following comments. 1. Currently the site has three free standing mini storage buildings. The proposal is to connect two of the buildings together, put small expansions of the third building and construct a new fourth building on the site. 2. The grading and erosion control plan shows a significant amount of grading north of the site on the Burlington Northern/Santa Fe Railroad property. It also shows some grading and the installation of silt fence east of the site on adjacent property. A permit will be needed from the Railroad Company to allow the grading in their right-of-way. Without the grading it will be difficult to build the proposed new building. Permission will also be needed from the property owner to the east to install the silt fence and do the small amount of grading shown on their property. 3. A small pond has been shown along the southerly property line. It takes drainage from about a quarter of the site. There have been no calculations submitted for this pond. One problem we see is that the only emergency overflow from this pond would be to the south on to the adjacent property into a currently existing pond there. There is an existing storm sewer system which flows along the western line of this property to the ditch system north of the property along the railroad. We questions whether it would be better to either tie into this storm sewer system and eliminate the pond or possibly build and independent storm sewer system on the site which would drain to the north. We believe that a land locked pond that can only overflow onto the neighboring property should not be allowed. 4. Glen Sundeen from the Elk River Municipal Utilities indicated at the staff review meeting that he needs a 10-foot utility easement running north and south through the center of the site for guy wires from an existing power pole shown along the north property line. o./p roj./806510J/0240/510-0312 m a rch 99 1326 Energy Park Drive • St. Paul, MN 55108 • 651/644-4389 fax 651/644-9446 toll free 888/368-4389