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DEPARTMENT OF NATURAL RESOURCES August 31, 2018 City of Elk River Planning Commission 13065 Orono Parkway Elk River MN 55330 Ecological and Water Resources Division RE: MISSISSIPPI RIVER DEVELOPMENT CUP for PI # 75-521-0110 and 75-521-0120 Dear City of Elk River Planning Commission, 1035 5 Benton Dr. Sauk Rapids, MN 56379 I have reviewed the submitted plans for a CUP to construct a multi -family development unit along the Mississippi River, I have found the following issues. The construction plans do not show the height of the building but the plans do show that the building will be a 4 story building. I do not know if this building will meet the height restriction of 30 feet per Sec 30-2022 (c). A Height greater than 30 feet could alter the scenic, historical, natural value that was outlined in Minnesota Statute 103F.315. Typically 4 story buildings are a greater height then 30 feet. The location of the building along with subsequent water retention ponds and other infrastructure could destabilize the bluff. The location of the retention pond is of concern as it will be placing head pressure on the side slopes of the pond along with more water being placed in the pore spaces of the soil in this location which could destabilize the bluff. The retention pond plans show that they removing what appears to be the top of the bluff. I would advise having the applicant change the placement of the retention pond to the side of the building and further away from the bluff. In addition to the above mentioned structures, placing a parking lot at the 100 year flood elevation or slightly above could require the applicant to meet sec 30-1913 paragraph 5. Vehicles could be viewed as equipment that is flammable, explosive or potentially injurious to humans, animals or plant life. This would require a plan approved by the city council. In addition to the floodplain concern placing a driveway/roadway on the bluff is not recommended due to the level of grading and manipulation required to establish said driveway/road. This could also cause erosional issues and destabilize the bluff from having a smooth surface for the water run long which would increase the velocity of this runoff. Since this is a semi-public space there are safety concerns for vehicle and pedestrian traffic due to the slope. Creating a parking lot in this location could also conflict with you clearcutting code. Sincerely, James Bedell Area Hydrologist 11035 S Benton Dr.1 Sauk Rapids, MN 53379 j (320) 223-7850 1 ;arnes.bedell state.ntn.us I Minnesota Department of Natural Resources • Division of Ecological and Water Resources 800 Oak Savanna Ln. SW Cambridge MN 55008