Agenda - Council - 08/11/1987 - Special

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Page 2 April 16, 1987 4. In review of the drainage, the developer proposes to provide an 11.5 acre ponding area. In reviewing the drainage area, the 100 year flood elevation could exceed elevation 868. Therefore, building should be restricted to a minimum elevation of 872.0. The 100 year elevation of 867.0 shown on the plat is based on an overflow of 866.0. Easements are proposed for the future overflow to the south, however, this overflow is not proposed to be constructed. 5. In review of the grading plan, the developer proposes to grade to a minimum elevation of 873.0. To maintain Class I soils for building (6 feet above water table), the minimum elevation should be 873.5. Water table elevations in the area were found to be at 867.5 during the fall of 1985. The developer has indicated that he may remove material off the proposed plat. Therefore, a conditional use permit will be required for the grading and excavation. 6. In review of access to the site, all lots would front on 149th Avenue N.W. The developer does not intend to upgrade the existing street and is willing to limit vehicle use to normal. residential use. The developer will also dedicate 14 feet cf right-of-way for the future upgrading of 149th Avenue in the event it would be designated as a Municipal State Aid Street. 7. In review of future utilities, the developer is providing a 20 foot utility easement on the back lot line and a 10 foot easement on side lot lines. We would recommend approval of the preliminary plat contingent on the following: 1. Providing adequate prctective convenants to control the development, 2. Meeting the intent and criteria of the Planned Unit Development Ordinance, 3. Obtaining a conditional use permit to removal of material from the site. An approved haul road other than 149th Avenue should be provided for hauling excavated material from the site. I