05/10/2006 P&Z Packet - Laserfiche WebLink

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• • • Vegetation Establishment in Stormwater and Infiltration Ponds Stormwater treatment ponds within The Preserve's conservation areas have been excavated and rough graded during the initial site grading process in spring and summer of 2005. Water control structures, such as inlet and outlet pipes and weirs where installed prior to the initial grading of each stormwater basin. As required by the Minnesota Pollution Control Agency, silt fences have been installed along all edges of stormwater basins to minimize sedimentation of these basins or erosion of sediment into the surrounding conservation areas or off site wetlands. Stormwater treatment ponds will be final graded during the final phases of the overall site grading. Stormwater treatment ponds within the conservation area should be seeded and maintained as natural or semi - natural wetlands that compliment the surrounding natural communities within the conservation area. Therefore, only native, non - invasive plant species should be seeded into stormwater ponds. Native plant species that can tolerate fluctuating water levels and increased sediments, salt, and nutrients should be selected for each basin, and native seed mixes should be tailored to the design hydrology, soils, side slope profiles, and topographic configurations of each stormwater treatment pond. VI. Socio- Cultural Considerations and Recommendations Signage Along Conservation Area /Residential Lot Boundaries Integra Homes will install and The Preserve's Homeowner Association will maintain, repair and, if necessary, replace the signage, which is placed within the conservation area. Wherever possible and reasonable, conservation area signage will be installed during the initial land development phase of The Preserve Conservation Development (Spring /Summer of 2006 or Spring /Summer of 2007). Integra Homes will post up signs along rear lot lines and lot corners that adjoin the conservation easements and /or outlots. Signage will also be placed in other locations within the conservation area, as determined as necessary by the Integra Homes and the City of Lino Lakes. The residential owner of each lot adjacent to the conservation area may not remove, alter or damage the signs. Conservation area signage should be designed to be easily recognizable, durable, and resistant damage by prescribed burning and other stresses associated with restoration and management of the conservation areas. Signage should be tall enough (at least 3 to 4 feet) to stand above native perennial prairie grasses and low shrubs, taking into account the height of mature restored native vegetation within each conservation area. Trails A public pedestrian trail has been planned within upland and wetland portions of the conservation areas and along the residential streetscape. The trail easement and infrastructure will be owned and maintained by the City of Lino Lakes. Figure 7 illustrates the proposed alignment of this trail corridor. Native and non - invasive plant species should be seeded and established along the trail corridor following trail construction, consistent with the natural communities the trail transects. Monitoring and management of problematic weed establishment along the trail corridor should be conducted on an annual basis, as weed seeds are likely to be introduced by trail users along the trail corridor. Although the trail may be cleared of snow by plowing or shoveling, road salt and sand should not be used to manage snow or ice within the conservation areas. The Preserve Conservation Development - Restoration and Management Plan 27