06/26/2002 Env Bd Packet - Laserfiche WebLink

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Adequate capacity exists in the sanitary sewer system to service the proposed development. In addition, the Black Duck Lift Station, which services the area, is scheduled for replacement in 2003. Drainage and Utility Easements. Drainage and Utility easements are proposed being five feet in width at adjoining lot lines, and 10 feet in width at adjoining street lines and rear lot lines as required. Drainage and Utility easements covering the 100 year High Water Level and those covering underground storm sewers are subject to review and approval by the City Engineer. Easements should be provided to access all pond and wetland areas. Specifically, easements should be provided to access Outlot F and cover the emergency overflow on Lots 6, 9, and 10, Block 8. Parkland Dedication. The Park Board discussed the proposed subdivision at its February 4, 2002 meeting. The board is recommending 100% cash payment in lieu of parkland dedication. As explained in the Public Services Director's February 5, 2002 memo (attached), the proposed development lies outside the planning limits of the Comprehensive Park and Trail System Plan. The Park Board looked at several alternatives and recommended the payment in lieu as the preferred option. Floodplain. Portions of the site lie within a Flood Plain Zone A. Zone A represents areas of 100 year flood where base flood elevations have not been determined. The City's Floodplain Management Ordinance requires that principal structures be located no lower than one foot above the regulatory flood protection elevation. The City's Subdivision Ordinance requires that proposed basements be four (4) feet above the water table (normal water level) and two (2) feet above the design flood levels of ponding areas. The submitted grading plan identifies proposed 100 year High Water Level elevations. Conformance to the requirements cannot be determined for Lots 23 through 27, Block 8 due to lack of documentation on the normal and high water levels of wetlands No. 12 and No. 13. The applicant should submit this documentation. All other lots are in conformance. The proposal is subject to the review and approval of the City Engineer and Rice Creek Watershed District. If the proposed subdivision is approved, the Developer will be required to make application to FEMA for a Letter of Map Amendment (LOMA) or Letter of Map Revision (LOMR) to revise the existing Flood Plain maps consistent with the proposed grading. Wetlands. The project site contains 19.39 acres of wetland. 2.06 acres of wetland are proposed to be impacted by the site development. The wetland mitigation will take place on -site, by creating two new wetlands and three water quality ponds, which will have a total area of 2.51 acres and 3.27 acres, respectively. A portion (.20 acres) -of one of the existing wetland areas will be converted from a Type 2 wet meadow to a Type 3 s allow marsh wetland to help facilitate site drainage. Stoneybrook Page 5