08-15-2011 Planning Commission Packet

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t � � . :�. FILE#11-3518 i 10 August 2011 Page 3 of 5 which may need to be enlarged or modified to account for the additional volumes. The additional 10 square feet within the 0 to 75' zone is considered allowed hardcover as it is to be part of the new stair system. Conditional Use Permit Earth movement which exceeds 10 cubic yards within 75 feet of the lake requires a CUP. The applicant is currently working towards development of a stabilization plan which meets city engineer approval. This plan should be certified by the applicant's engineer and finalized prior to the issuance of the administrative grading permit to begin the work. The public hearing should address any additional non-engineering related concerns regarding erosion prevention or stabilization of slope, natural re-vegetation and appearance from the lake, excess hardcover and impacts to adjacent properties. The city engineer will review the plans from a stability and safety perspective. City Code section 78-1286 offers guidance for reviewing this type of CUP. Alterations must be designed and conducted in a manner that ensures only the smallest amount of bare ground is exposed for the shortest time possible. Mulches or similar materials must be used, where necessary, for temporary bare soil coverage, and a permanent vegetation cover must be established as soon as possible. Comment: The proposal will be reviewed to assure limited exposure of bare soil and establishment of stabilizing vegetation. Methods to minimize soil erosion and to trap sediments before they reach any surface water feature must be used. Altered areas must be stabilized to acceptable erosion control standards consistent with the field office technical guides of the local soil and water conservation districts and the United States Soil Conservation Service. Comment: The City requires the applicant have an erosion control plan and collects an escrow security to assure the applicant and contractor will maintain erosion control protection throughout the duration of the project. Fill or excavated material must not be placed in a manner that creates an unstable slope. Plans to place fill or excavated material on steep slopes must be reviewed by the city engineer for continued slope stability and must not create finished slopes of 30 percent or greater. Comment: The city engineer will review the slope stabilization plans to assure protection of the slope as well as the lake. Fill or excavated material must not be placed in bluff impact zones. Any alterations � below the ordinary high water level of public waters must first be authorized by the commissioner of the department of natural resources under Minn.Stat.§ 103G.245. Comment: Alterations below the OHWL or within a bluff impact zone are not proposed.