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Conservation Design Plan <br />Fox Hill <br />PID 0411723410005 <br />5 <br /> <br />Conservation Design Master Plan <br />Stormwater Master Plan <br />Existing site topography directs the majority of added surface runoff toward the north wetlands <br />and the maintained pond located along the east portion of the property. These drainage patterns <br />will be preserved following redevelopment. The proposed project limits new impervious surface <br />and does not introduce additional stormwater management infrastructure. This limits the total <br />area of disturbance needed. Runoff from new impervious areas will continue to flow to existing <br />drainage features under existing conditions. Storm water calculations have been conducted to <br />determine the 100-year high water level of the north wetland and pond. Finished floor elevations <br />are set with adequate freeboard above the anticipated high-water levels to ensure protection from <br />flooding. <br /> <br />Invasive Species Removal and Management Plans <br />Invasive species were identified on the Fox Hills property during the wetland delineation field <br />investigation. Species observed within wetland areas included reed canary grass and cattail, <br />which are common in disturbed or managed wetland systems. No invasive species were observed <br />that would require immediate or large-scale removal as part of the proposed redevelopment. <br />The proposed project avoids direct disturbance of wetland areas, and no comprehensive invasive <br />species removal is planned. However, should limited invasive species management be necessary <br />as part of construction or landscaping activities within wetland buffer areas, appropriate control <br />methods may be utilized. <br />Reed canary grass may be controlled through mowing or selective herbicide treatments approved <br />for wetland use, per Minnesota DNR guidance. Any treatment would be implemented in a <br />manner that minimizes disturbance to native vegetation and wetland function. <br />Common buckthorn was also observed on the property, primarily within wooded areas and <br />wetland edges. Where buckthorn removal is associated with proposed grading or landscaping <br />activities, control may be accomplished using standard methods such as cut-stump treatment. <br />This approach involves cutting stems near ground level and applying an appropriate herbicide to <br />prevent resprouting. Treatment, if undertaken, would follow Minnesota Department of Natural <br />Resources recommendations and be timed to maximize effectiveness while minimizing impacts <br />to surrounding vegetation. <br />Overall, the proposed redevelopment is not anticipated to increase the extent of invasive species <br />on the site, and existing conditions are expected to remain substantially unchanged. <br />28