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<br />~ovvard R. Green O:Jmpany <br /> <br />August 5, 2004 <br /> <br />File 821800J-0240 <br /> <br />Mr. Scott Harlicker <br />City of Elk River <br />13065 Orono Parkway <br />Elk River, MN 55330 <br /> <br />Re: River Park <br />Preliminary Plat Review <br /> <br />Dear Mr. Harlicker: <br /> <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 /> <br />A. Grading and drainage plan <br /> <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 /> <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 /> <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 /> <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 /> <br />2550 University Avenue West. Suite 400N . SI. Paul, MN 55114 . 651/644-4389 fax 651/644-9446 toll free 888/368-4389 <br />