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kV Howarc R. Green CoTpany <br /> August 5, 2004 <br /> File 821800J-0240 <br /> Mr. Scott Harlicker <br /> City of Elk River <br /> 13065 Orono Parkway <br /> Elk River, MN 55330 <br /> Re: River Park <br /> Preliminary Plat Review <br /> Dear Mr. Harlicker: <br /> As requested, we have reviewed the submittal package for River Park Preliminary Plat. <br /> The submittal package included a preliminary plan set dated 7/9/04 and storm water <br /> management report dated July 27, 2004. The following are our comments on the <br /> materials submitted. <br /> A. Grading and drainage plan <br /> • The wetland impacts were reviewed by a Technical Evaluation Panel on July <br /> 29, 2004. Many of the proposed impacts were found to be acceptable by the <br /> panel and a few were not, The developer is in the process of addressing these <br /> comments. The US Army Corps has not accepted the wetland delineation <br /> until more details are provided on the specific locations of the wetland <br /> markings. <br /> • A NPDES Construction permit will be require from the Minnesota Pollution <br /> Control Agency, as part of the permit the developer will be required to submit <br /> a SWPPP. The SWPPP has been submitted for review and we have found it <br /> to generally meet the requirements, calculation need to be provided showing <br /> the proposed ponding meets the permit requirements. <br /> • The existing ditch crossing the north east corner of the site appears to possibly <br /> have some hydraulic connection (drain tile) to the farm located on the east <br /> side of County Road 40. The new drainage system must continue to provide <br /> an outlet. <br /> • The grading plans need to show normal and high-water levels for all ponds <br /> and wetlands. A number of wetlands have not been labeled with this <br /> information on the grading plans. <br /> 2550 University Avenue West • Suite 400N • St. Paul, MN 55114 • 651/644-4389 fax 651/644-9446 toll free 888/368-4389 <br />