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North Dayton Development AUAR <br />Please refer to Figure 6 for a visual depiction of the following existing cover types within the study area: <br />Cover Types <br />Before Acres <br />Types 1-8 wetlands 1 <br />22.0 <br />Deep Water/Streams <br />0.0 <br />Wooded/forest <br />51.0 <br />Brush/Grassland <br />0.0 <br />Cropland <br />467.0 <br />Lawn/landscaping <br />10.0 <br />Impervious surfaces <br />10.0 <br />Stormwater Pond <br />0.0 <br />Other (describe) <br />0.0 <br />TOTALS: 560.0 <br />MN DNR National Wetland Inventory: <br />Wetland acreages are currently <br />estimated based on the available aerial <br />imagery. Future wetland delineations <br />and determinations will ultimately <br />determine the amount of wetland on the <br />site. As development of the site may <br />include wetland impacts, it is <br />recognized that replacement will be <br />needed at a ratio of 2.0:1 or 2.5:1 as <br />part of any final development plan. The <br />future mitigation plan will identify <br />specific requirements. <br />The Minnesota DNR National Wetland Inventory Update was reviewed for the Project Area. The NWI <br />map (see Figure 12) identifies 34.1 acres of wetland within the Project Area with the following <br />breakdown: <br />• 16.5 acres are categorized as Type 1 Seasonally Flooded wetlands. Many of the Type 1 wetlands <br />are farmed or fringe deeper wetland habitats. <br />• 7.3 acres area classified as Type 5, Open Water wetlands, both of the Type 5 wetlands identified <br />within the Project Area are also listed on the DNR Public Water Inventory. <br />• 5.6 acres are identified as Type 3, Shallow Marsh wetlands; <br />• 2.9 acres are identified as Type 6, Shrub -scrub wetlands; <br />• 1.8 acres of wetland are characterized as Type 4, Deep Marsh wetlands. <br />The wetland area provided by the NWI map is estimated based on the available aerial imagery and <br />topographic data. A wetland delineation will need to be completed to confirm the presence or absence of <br />wetlands and to determine actual boundaries. <br />Post Development Cover Types: <br />A development scenario has not been completed to determine what cover types will exist after the <br />development of the site; however, based on preliminary planning some generalizations about changes to <br />cover types can be made (see Figure 7). In general, impervious surfaces and stormwater ponding areas <br />will go up while the remaining cover types will go down. This will be due to the construction of <br />residential units and the streets to service them. The average development density will entail <br />approximately 3.01 residential units per acre. Some commercial units will be constructed along the main <br />thoroughfare of the community to serve the new residents. Stormwater ponds and other structures will be <br />11 <br />