07/15/2004 Env Bd Packet - Laserfiche WebLink

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• • for Wards Lake is 883.7. The overlay zone and the shoreland setbacks within it are measured from this elevation. The entire project area is within the shoreland district. City ordinance regulates uses in the overlay district to protect and conserve the natural values of land adjacent to surface waters and related land resources. The shoreland ordinance classifies Wards Lake as a "natural environment" lake. A shoreland overlay allows the uses allowed by the underlying zoning. The project proposal includes rezoning the site for a single family planned development, which would allow single family dwellings. The following requirements of the shoreland ordinance are of particular interest for the proposed project: minimum lot area minimum lot width minimum OHWL setback 20,000 sf 80 feet (measured at both street and OHWL setbacks) 150 feet Section 1102.09, Subd. 3.B. of the ordinance states: "Roads, driveways, and parking areas must meet structure setbacks and must not be placed within shore impact zones when other reasonable and feasible placement alternatives exist. If no alternatives exist, they may be placed within these areas, and must be designed to minimize adverse impacts." (The shore impact zone is one -half the setback, or 75 feet.) Although the proposed project does meet the lot area and width requirements, it does not meet the requirements for setbacks because the island is less than 300 feet wide. Because of this and other normal zoning and development requirements that cannot be met, a planned unit development (PUD) has been proposed. A PUD is not simply a way to avoid development ordinance standards. A PUD offers the opportunity to deviate from strict application of ordinance requirements to achieve goals —such as more efficient use of land and preservation of desirable site characteristics that would not be possible when adhering to normal ordinance requirements. The proposed eight lot subdivision would be located only on the upland area with homes setback to the greatest extent possible from the ordinary high water level. Stormwater runoff from the homes and street will be diverted into swales and ponds, providing for infiltration, overland filtration, or treatment in the ponds (see Items 12, 16 and 17). The developer proposes custom grading of lots to maximize tree preservation and minimize site disturbance. Item 27 includes additional discussion of zoning ordinance requirements and the PUD. Floodplain: The city has a floodplain management ordinance. Around Wards Lake, the 100 -year flood elevation, which defines the floodplain, is 887.6. This includes the edges of the island and the peninsula. The City's surface water plan requires that the lowest floor Environmental Assessment Worksheet Page 11 Pheasant Hills 12th Addition