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Legacy at Wood's Edge Record of Decision City of Lino Lakes February 2004 Water Related Land Use (Shoreland and Floodplain Impacts) The southern and eastem portions of the site are located within the designated shoreland zoning districts for Marshan Lake and George Watch Lake. The City has adopted a shoreland and a floodplain ordinance that regulates development within these designated areas. Furthermore, the DNR has approved these ordinances. The proposed Legacy at Wood's Edge Development will fully comply with the standards of these ordinances. The proposed project does not lie within a delineated 1 00-year floodplain. Water Quality Impacts A surface water management plan-for the development is being proposed that will retain storm water runoff on -site for the purpose of improving water quality and incorporate infiltration to reduce surface discharge and promote recharge of the groundwater.` To comply with City and Rice Creek Watershed District requirements, the surface water management plan has addressed rate control by utilizing proposed ponds and existing wetlands for live storage. The development proposes to construct a drainage system within all the street improvements and parking areas to convey runoff to proposed ponding areas and infiltration cells (green space or 'underground storage chambers). Subsurface chamber technology takes advantage of the soil's inherent filtration and renovation capabilities to store and treat storm water runoff while providing the flexibility to plan for additional buildings and green space. To maximize pollutant removal efficiencies, the water quality control structures will be designed and constructed according to NURP, the National Pollutant Discharge Elimination Systems (NPDES) Phase 1I permit, the City of Lino Lakes, and Rice Creek Watershed District standards. Based on a water quality analysis, the proposed development will maintain adequate area for the retention (ponds) and infiltration, (natural and underground chambers) of surface water runoff. Before construction can proceed, both the City of Lino Lakes and Rice Creek Watershed District must issue permits to satisfy surface water management regulations. The project will eliminate two existing infiltration basins along the north side of Town Center Parkway. These basins will be replaced elsewhere on the site A National Pollutant Discharge Elimination System (NPDES) Phase II permit will be required for this project. Erosion prevention and sediment control best management practices (BMP's) will be used in accordance with the NPDES Phase 1I permit. An erosion control plan will be developed for the site and will likely include temporary and permanent erosion control measures such as timely revegetation of disturbed areas, hay bales, silt fencing, flotation silt curtains, and sedimentation ponds.