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' CITY ; ,0F 7 OBONO J ■ m #239 Cf CITYof ORONO Post Office Box 66•Crystal Bay, Minnesota 55323• Municipal Offices On the North Shore of Lake Minnetonka July 12, 1984 Mrs. Muriel Senn 4448 North Shore Drive Mound, MN 55364 Re: Paving Driveway Dear Mrs. Senn: I have reviewed your proposal to pave your existing gravel driveway and turn-around apron. After discussion with the City Engineer, we agree that in your specific situation, paving with asphalt or concrete over the existing gravel surface may actually have a beneficial effect on the quality of runoff entering the lake, since the silt from the gravel will be eliminated from the direct runoff. Even though bituminous or concrete paving is less permeable than gravel, it appears that with your unique topographic problems, paving appears to be a good idea. 1 also discussed with the City Engineer the idea of creating a "basin'* around the perimeter of the turnaround area to catch the runoff and slow it down. He felt this would need to be quite extensive to have any major effect, and he suggested instead that you ensure that the paving be sloped to allow runoff to flow equally to all edges of the paving, and eliminate a swale which would channel the runoff to a single point and possibly cause some erosion. Based on the above, we have no objections to your proposal, with the condition that the paving cover only areas already gravelled, i.e. the 12' wide garage driveway apron leading to the turnaround, and the turnaround itself which is approximately 30' wide and 40' deep, and bounded by the existing hedge, and that the paving be sloped in all directions as described above. No permit is required for this work. Thank you for your concern with this project and your patience in awaiting this response. Michael P. Ga^^d^ron Assistant Zoning Administrator BULUING & ZONING - 473-7357 • ADMINISTRATION & FINANCE - 473-735U assessing , , , pc: Thomas J. Jacobs, Building Official PL'BLIC WORKS - 473-7359