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• EXHIBIT --A TOt Jeanne A. Mabusth, Zoni,.g Admini)trator FROM, Alan P. Olson, City Planner DATES April 13, 1982 SUBJEM 1669 Tonka Lake Properties - Proposed Subdivision (PRD) The basic zoning on this property is U.-IC S acre/unit. Because of the peninsula location and rueultant 3-aided 75' setback requirements, this site is a nat.-al one to consider for PRD cluster -type development allowing for defined housing pads and common open space close ro the %-ke. The limiting site factor is the la<e and -- iltant floodplain area below elevation 931.5. This defines ,jth setback and hardcover limitations. All building sites including the existing house are above the 931.5 floodplain elevation. Provided an open space/flowage easement over Outlot B is granted to the City, Section 31.841 c allows this flood fringe area (between 929.4 and 931.5) to be ereditid for density purposes. All now building sites meet the 75' shoreline setback. The existing house (aiad proposed lot) encroaches to about 40' from the shore. It has been demonstrated to staff that 4 lots totally conforming to the 75' setback are possible if the existing house were demolished (lot 2 becomes smaller). The request is to allow the existing structure to remain where it is. The city could require removal of the existing house and full compliance with the 75' setback as a PRD condition. However since 4 conforming lots are feasible, the existing substandard house location really has no bearing on determination of the appropriate density. Therefore, based on setback and net lot area factors, the allowable density would be 4 or 5 units (2.75 acres - road O.L.A. .22 acre - 2.53 acre ; .5 - 5 units by area or 4 units practically possible per plan). On the other hand, hardcover is extremely limiting. Per 31.931 and 34.202, there can be no hardcover below elevation 931.5, or within 75' of the shoreline. And in the remaining area the maximum hardcover can be ;.o more than 253. The maximum hardcover allowed is therefore only 5526 sf. Any amount over th.s amount requires a varianco. based upon the house sizes proposed (excluding drivewy hardcover) the maximum density allowed by hardcover limitation would be 2 units, not 4.