Agenda - Environmental Policy Board - 08/21/2023

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i. Surface Water—lakes, streams, wetlands, intermittent channels, and county/judicial ditches. Include any special designations such as public waters, shoreland classification and floodplain/floodway, trout stream/lake, wildlife lakes, migratory waterfowl feeding/resting lake, and outstanding resource value water. Include the presence of aquatic invasive species and the water quality impairments or special designations listed on the current MPCA 3O3d Impaired Waters List that are within 1 mile of the project. Include DNR Public Waters Inventory number(s), if any. Minnesota Department of Natural Resources (DNR) Public Waters within one mile of the project site includes Rum River (M-063), Grass Lake (DNR# 61989), and 14 unnamed basins (DNR# 61648, 61991, 61619, 62546, 71459, 61990, 61997, 62788, 65935, 70837, 71329, 71541, 71612, 71579), with Unnamed Basin 70837 located within the project site (see Figure 7). Rum River is listed on the Minnesota Pollution Control Agency's (MPCA's) 303d Impaired Waters List$for mercury in fish tissue. A previous on-site wetland delineation performed by Pinnacle Engineering, Inc. in 2022 identified two wetlands (Wetland 1 is 3.05 acres and Wetland 2 is 0.47 acres) within the project site (see Figure 8 and Appendix B). The wetlands general align with the NWI mapped wetlands on the eastern portion of the site. ii. Groundwater—aquifers, springs, and seeps. Include 1) depth to groundwater; 2) if project is within a MDH wellhead protection area; and 3) identification of any onsite and/or nearby wells, including unique numbers and well logs, if available. If there are no wells known on site or nearby, explain the methodology used to determine this. According to the Minnesota Hydrogeology Atlas, depth to the water table varies from 0 to 30 feet across the project site (see Figure 9). Based on the Minnesota Department of Health (MDH) Well Index, static ground water appears to be between 25 to 28 feet below the surface in the area. According to the MDH Source Water Protection Web Map Viewer, the project site is within the Minneapolis, St. Paul, and St. Cloud Priority A and Priority B Drinking Water Supply Management Areas. According to the Well Index, there are two active domestic wells on the project site (Unique Well ID 668043 and 430267, see Figure 10). No additional wells are within 150 feet of the project site. The onsite wells will be located and abandoned during construction of this project. Well reuse for irrigation purposes may be considered. If any other wells are encountered during construction, they will be capped and sealed according to Minnesota Department of Health regulations. 8 Available at https://www.pca.state.mn.us/air-water-land-climate/minnesotas-impaired-waters-list Haviland Fields EAW 12 July 2023