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Riverstone South EAW <br />Draft — December 2020 <br />feet southwest of the project area. Land use within the Mississippi River Corridor Critical Area is <br />discussed under Item 9. <br />Impaired waters listed by the Minnesota Pollution Control Agency (MPCA) and located within 1 <br />mile of the site include only the Mississippi River (07010206-805), which is impaired for aquatic <br />consumption (AQC), aquatic life (AQL), and aquatic recreation (AQR) from the Crow River to <br />Upper St. Anthony Falls. <br />ii. Groundwater — aquifers, springs, seeps. Include: 1) depth to groundwater; 2) if project is within a <br />MDH wellhead protection area; 3) identification of any onsite and/or nearby wells, including unique <br />numbers and well logs if available. If there are no wells known on site or nearby, explain the <br />methodology used to determine this. <br />Depth to groundwater varies across the project area. Depth to static groundwater levels in 41 <br />groundwater wells located near the project area ranged from 10 to 50 feet (Table 5 and Appendix <br />Q. The project area does not fall within a Minnesota Department of Health (MDH) wellhead <br />protection area. The nearest Source Water Protection area is the Ramsey West Drinking Water <br />Supply Management Area, located 0.5 mile east of the project area. Although several groundwater <br />wells are located in the general vicinity of the site, the Minnesota County Well Index does not <br />identify any wells located onsite. One unregistered well was found in the southeastern corner of the <br />site during the land survey for the property. The project proponent is determining whether this well <br />has been abandoned and will ensure it is abandoned prior to construction as noted under Item <br />l l.b.iii. <br />Table 5. Nearby Field Verified Groundwater Wells <br />Well <br />No. <br />Surface <br />Elevation <br />(feet) <br />Depth <br />(feet) <br />Cased <br />Depth <br />(feet) <br />Depth to <br />Location <br />(Direction <br />from Site) <br />Aquifer <br />Static <br />Water <br />Level (feet) <br />Bedrock <br />(feet) <br />503721 <br />882 <br />221 <br />156 <br />35 <br />118 <br />Northwest <br />St. Lawrence -Tunnel City <br />430232 <br />883 <br />338 <br />294 <br />30 <br />116 <br />Northeast <br />Wonewoc <br />511952 <br />860 <br />170 <br />134 <br />28 <br />122 <br />West <br />Tunnel City <br />486181 <br />858 <br />145 <br />135 <br />13 <br />- <br />West <br />Quat. buried <br />227345 <br />883 <br />75 <br />71 <br />30 <br />- <br />Northwest <br />Quat. buried <br />256060 <br />863 <br />186 <br />130 <br />40 <br />112 <br />West <br />St. Lawrence -Tunnel City <br />114352 <br />877 <br />176 <br />134 <br />40 <br />95 <br />Northwest <br />Tunnel City <br />124137 <br />861 <br />246 <br />161 <br />20 <br />149 <br />West <br />Tunnel City <br />711529 <br />863 <br />155 <br />142 <br />30 <br />- <br />West <br />Quat. buried <br />516054 <br />864 <br />190 <br />146 <br />30 <br />145 <br />South <br />Tunnel City <br />133390 <br />875 <br />190 <br />162 <br />39 <br />138 <br />Northwest <br />Tunnel City <br />193778 <br />880 <br />186 <br />155 <br />18 <br />155 <br />Northwest <br />Tunnel City <br />672386 <br />849 <br />70 <br />65 <br />14 <br />- <br />West <br />Quat. buried <br />124138 <br />862 <br />246 <br />170 <br />20 <br />151 <br />South <br />Tunnel City <br />242411 <br />871 <br />178 <br />null <br />14 <br />149 <br />West <br />Tunnel City <br />416682 <br />861 <br />186 <br />133 <br />18 <br />103 <br />Northwest <br />Tunnel City <br />11 <br />