01/12/2022 Item 6B, Lake Amelia Woods FP

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Water willow (Decodon verticillatus), a MN DNR listed species of Special Concern, has been identified on site per the wetland delineation report. It occurs on undisturbed lakeshores. Conservation of this species depends on avoiding physical alterations of shoreline and preserving native plant buffers. Minimal impacts to the resource along the lake shore are allowed for a 20 ft wide access to the lake. Wetland D is classified as a preserve due to high value amphibian habitat and vegetative diversity. These areas will be protected by a wetland buffer adjacent to the wetlands and shoreline. Floodplain The 2015 DFIRM indicates Zone AE floodplain along the lake. The FEMA base flood elevation (BFE) is 910.2 EL. No floodplain impacts are proposed with this development. Shoreland Management Overlay The general purpose and intent of the Shoreland Management Overlay ordinance is to protect public waters. Per the ordinance Policy statement, the uncontrolled use of shorelands of the city affects the public health, safety and general welfare not only by contributing to pollution of public waters, but also by impairing the local tax base. Therefore, it is in the best interests of the public health, safety and welfare to provide for the wise subdivision, use and development of shorelands of public waters. As discussed, the site is located in a Shoreland Management Overlay district of Amelia Lake. This lake is a classified as a Natural Environment Lake and has a 908.1 OHWL elevation. The required OHWL setback is 150 ft for unsewered lots. The proposed houses and private septic system setbacks are compliant. Per City Code Section 1102.07(2)(a), structures and facilities must be located to meet all setbacks. Stormwater facilities are not allowed within the 150 ft OHWL setback, 40 ft CSAH 54 setback or 10 ft side yard building setbacks. The plans shall have been revised for Lot 1. Except for allowed water -orientated accessory structures, accessory structures and facilities shall meet the required principal structure setback and shall be centralized (City Code Section 1102.07(1)(c)6). Per City Code Section 1102.87(1)(c)4 of the Shoreland Management Overlay ordinance, impervious surface coverage on each lot must not exceed 30%. Per the Preliminary Plat, each lot is under 5.9% impervious and meet the allowed impervious surface coverage requirements. A native vegetated wetland buffer will be required as a stormwater management best management practice (BMP) to minimize runoff pollutants from entering the lake. 10