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STATE O F UVUV L��O�Ir -,� DEPARTMENT OF NATURAL RESOURCES PHONE NO. 612/296 -7523 1200 WARNER RD., ST. PAUL, MN 55106 FILENO. March 21, 1988 Ms. Anne Norris City of Ramsey 15153 Nowthen Boulevard NW Ramsey, Minnesota 55303 Dear Ms. Norris: RE: REVIEW OF OAKWOOD HILLS AND RAMBOSEK RED OAK ESTATES I have reviewed the preliminary plats provided including the revised plat of Oakwood Hills. Based on my review I offer the following comments: 1. There are no DNR protected wetlands on the site, therefore no DNR permit will be required pursuant to 105.42. 2. Any site dewatering for utility construction in excess of 10,000 gallons per day or 1,000,000 per year requires a DNR appropriation permit as outlined in Minnesota Statutes 105.41. 3. A floodplain area exists along Anoka County Ditch #3 which runs between the two (2) plats. This area falls under the jurisdiction of the city's environmental ordinances and would be classified as a general floodplain district. Any alteration of this area requires a conditional use permit under the city's floodplain ordinance. The proposed crossing of the ditch by Wolfram Street Northwest must undergo conditional use permit process to determine the appropriate size of the culvert and other details of the crossing. In addition, the ordinance procedures will establish minimum building elevations for Lots 1, 2, 3 and 4 of Block 3; Lots 1 and 2 of Block 2 of Oakwood Hills which are all or partially within the floodplain. Without going through the conditional use procedures, the city will be unable to exactly inform the developer of the minimum building and sewage treatment system requirements. In addition, the lots abuting the ditch in Rambosek Redoak Estates should also have minimum building elevations established through this procedure. 4. Anoka County Highway Department is the responsible ditch maintenance authority for County Ditch #3 and they should be consulted regarding this project. AN EQUAL OPPORTUNITY EMPLOYER V