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5.1.2.3 <br />5.1.3 <br />(Figure 8 in Appendix D). Potentiometric surfaces of this units are depicted on Figures 7 in <br />Appendix D for the Tunnel City and Figure 9 in Appendix D for the Wonewoc Sandstone. <br />Potentiometric surfaces were created by the Minnesota Geologic Survey and provide a rough <br />estimate for water elevations for a proposed well within these units and their groundwater flow <br />direction. <br />The Metropolitan Council generally describes the productivity of the Tunnel City — Wonewoc <br />Aquifer as variable. Yields tend to be moderate to low with some of the highest yields reported <br />where bedrock units are highly fractured. <br />Mt. Simon -Hinckley Aquifer <br />The Mount Simon -Hinckley Aquifer is generally described by the Metropolitan Council as a high <br />to moderate yield aquifer. New high -capacity wells are generally not permitted by the Minnesota <br />Department of Natural Resources as use has been restricted by Minnesota Law, therefore it is <br />not discussed in this report in greater detail. <br />Ramsey Municipal Wells <br />The City of Ramsey wellfields are comprised of 8 wells. Wells 1 and 2 are located in the <br />southeastern portion of city limits, while Wells 3 through 8 are located in the south-central portion <br />of the City. The City of Ramsey currently receives all of its potable water from the Tunnel City- <br />Wonewoc aquifer. The well locations are depicted on Figure 1 in Appendix D. These wells are <br />detailed in the table below. <br />Table 10 — Ramsey Well Data <br />Weill <br />No. <br />Well No. <br />Date <br />Constructed <br />Aquifer <br />Total <br />ept <br />(ft) <br />Casin• <br />Depth <br />(ft) <br />Casing <br />iamete fr <br />(in) <br />1 <br />161441 <br />1984 <br />Tunnel City <br />Group <br />323 <br />243 <br />14 <br />2 <br />416183 <br />1987 <br />Tunnel City <br />Group <br />320 <br />240 <br />14 <br />3 <br />580306 <br />1997 <br />Tunnel City- <br />Wonewoc <br />345 <br />222 <br />30 x 24 <br />4 <br />580313 <br />1998 <br />Tunnel City- <br />Wonewoc <br />321 <br />191 <br />30 x 24 <br />5 <br />593672 <br />2000 <br />Tunnel City- <br />Wonewoc <br />316 <br />215 <br />30 x 24 <br />6 <br />706840 <br />2005 <br />Tunnel City- <br />Wonewoc <br />390 <br />282 <br />30 x 24 <br />7 <br />743832 <br />2007 <br />Tunnel City- <br />Wonewoc <br />332 <br />216 <br />30 x 24 <br />8 <br />743833 <br />2007 <br />Tunnel City- <br />Wonewoc <br />354 <br />245 <br />30 x 24 <br />FEASIBILITY STUDY RAMSY 154354 <br />Page 16 <br />