5. SR 09-12-1994 - Laserfiche WebLink

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. . . This pond will be mitigated at a ratio of at least 2: 1, per Wetland Conservation Act rules, if appropriate permits are obtained to fill it. This wetland is not protected by the Minnesota DNR and falls under the nationwide permit of the Army Corp of Engineers, per the attached December 7, 1993, letter from the Department of the Army. 13. WATER USE Il-, .,' a. Yes; a well exists on the existing homesite. It will be abandoned according to the Minnesota Department o{ Health regulations. However, it is a pre-1974 well and does not c~rrently have a Unique well number. ' b. It is anticipated that temporary dewatering will occur during construction of each phase for the installation of sanitary sewer and water lines. Also, dewatering practices are expected to occur for 2 - 3 weeks for each phase of the development and will include more than 10,000 gallons of water per day. Therefore, a MnDNR water appropriation permit will be required. c. Yes; the municipal water supply system of the City of Elk River will be extended to the project. The MnDNR water appropriation numper is 753215. Estimated water usage is 64,350 gallons per day for residential consumption, 27,750 gallons per day for commercial consumption, for a total estimated consumption of 92,100 gallons per day. 16 . SOILS The general soil classifications include: Emmert & Hayden Emmert & Chetek Hayden 17. EROSION AND SEDIMENTATION a. Slopes on the commercial plat will be leveled to provide a basic flat surface consistent with the requirements of the project. b. Slopes in the residential portion, except for house pads and roads, will be maintained as much as practical. c. The attached preliminary site plan identifies existing slopes of 12% or more and areas where erosion control methods will be implemented during construction. This sediment and erosion control plan will be fine-tuned through the City of Elk River's platting process as each phase is developed. Special care will be taken to avoid sediments from entering the natural ponds in the project site. Slopes of 30% or more that are to remain after construction will be protected with "no cuttingll easements to preserve their natural vegetation. d. The types of question #16. entire plat. soils involved in the grading are identified in A dirt balance will try to be achieved over the 18. WATER OUALITY - SURFACE WATER RUNOFF a. Two (2) sedimentation ponds, as identified on the attached site plan, will accommodate the majority of the runoff for the entire commercial areas to aid in water clarification. Typical suburban lawn pollutants are expected in the residential portion of the project. Onsite ponding areas will be used as much as practical for runoff in this area.