05-25-1999 Council Agenda - Laserfiche WebLink

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on this land, irrespective of the municipal boundary location. Due to the need to share utility access, a joint powers agreement will be required whether the municipal boundary is changed or remains in place. Shoreland Zoning Twin Lake is classified as a Recreational Development lake by the Department of Natural Resources. Lots which adjoin the lake (riparian) must be 20,000 square feet in area, and maintain a 75 foot setback from the Ordinary High Water (OHW) level. Both the area and setback calculation are measured from the OHW, as any land below the OHW is considered a part of the public water. As a result, Lots 6 and 7 of Block 2 will need to be increased in size. Lot 6 contains approximately 19,100 square feet above the OHW, and Lot 7 contains approximately 17,100. Because the remainder of the lots are all significantly larger than required, there should be adequate opportunity to shift lot lines slightly to accommodate this additional area. With the exception of Lot 6, each of the building pads is shown in conformance with the setback requirements. The pad on Lot 6 would encroach into the required setback by about 5 feet. This should be corrected on the final grading plan. It should also be noted that the Shoreland Management ordinance requires that the lakeward one -half of the setback area (37.5 feet) is classified as Shore Impact Zone, and is not to be disturbed from its natural state. The remaining 37.5 feet of the setback area may be landscaped, but may not contain any structures. The DNR has suggested a common access to the lake serving the development. This recommendation is designed to minimize the number of individual dock accesses to the small lake. The City should discuss the issue of private dock access with the developer. Streets, Grading and Drainage All building pads appear to conform with the flood protection ordinance regarding elevation above the flood elevation of the lake. Lots 10, 11, and 12 require fill to accommodate this requirement. In that regard, the cul -sac is also located on fill, about three feet higher than the existing grade. The fill for these three houses will increase the amount of tree loss on this end of the plat. The City's tree preservation /replacement requirements state that significant trees lost to development grading such as this must be replace at a 1:1 caliper inch ratio, up to a maximum of 30 caliper inches per acre. The area which is being filled or graded outside of the street right -of -way and house pads should be calculated to provide a tree replacement requirement for this plat. The developer has the option of either surveying the trees being lost for a specific number, or providing the maximum requirement (30" per acre) in lieu of a survey. Page 79