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Flood Plain <br /> A large portion of the site does fall within the flood management zone. Floodplain <br /> management shall be incorporated into the overall site design. The site will need to <br /> accommodate the same volume of flood storage currently on the site. Floodplain <br /> mitigation will be achieved through the construction of stormwater ponds and through <br /> raising site elevations. Floodplain impacts are subject to both City and Rice Creek <br /> Watershed District requirements. <br /> A Base Flood Elevation is required to be determined, using detailed methods acceptable <br /> by the Federal Emergency Management Agency (FEMA). <br /> A FEMA Conditional Letter of Map Revision (CLOMR) and Letter of Map Revision (LOMR) <br /> are required for this site. <br /> Greenway System and Trails <br /> The 2040 Comprehensive Plan identifies a proposed Greenway System extended across <br /> the subject site. The PUD process provides the opportunity for the creation of a multi- <br /> functional greenway corridor that incorporates many attributes into one comprehensive <br /> design, including: <br /> • Interconnected trail system and parks <br /> • Protected open space and natural areas <br /> • Wetlands, including Wetland Management Corridor and buffers <br /> • Major and minor drainage routes and other elements of the local surface water <br /> management system (including stormwater ponds) <br /> • Floodplain management <br /> A greenway/park system was initially established to the south of the development site <br /> with the Century Farm North subdivision. That system was stubbed to the north from <br /> Robinson Drive and to the east from Century Trail. <br /> The developer has attempted to expand this system throughout the project. <br /> Opportunities for enhancement of the greenway system remain. A connection should <br /> be made from the Century Trail connection across the County ditch. <br /> Trail corridors should be a minimum 30-40 feet in width above the high water level of <br /> ponds. The slope to ponds should be minimized where possible and not exceed 3:1, but <br /> a 6:1 would be preferred. <br /> An Anoka County regional trail is planned to run along Main Street. This needs to be <br /> accommodated as part of the project development, as well as a trail on Sunset Avenue. <br /> Trail connections to the existing internal trail system should be provided. The developer <br /> 7 <br />