Laserfiche WebLink
NORTHWEST hniKrariun nanp~ecipamiuu <br />1 1 1 ~ hniMr>tia~0anprecipfl:bioo SOUTHEAST <br />1111 <br />_ __. <br />2. The Eau Claire Aquitard <br />The Eau Claire Formation is aloes-permeability shale that overlies the Mt. Simon-Hinckley <br />Formation. It is a significant regional aquitard that limits leakage between the Mt. Simon-Hinckley <br />Aquifer and overlying aquifer systems. <br />3. The Franconia-Ironton-Galesville Aquifer <br />The Ironton and Galesville Sandstones are moderately permeable. These two units are sometimes <br />treated as an aquifer system separate from the overlying Franconia Formation but more typically the <br />three units are lumped together as a single regional aquifer system (the lower portion of the <br />Franconia Formation is sometimes considered an aquitard). In some locations, this aquifer can <br />produce substantial quantities of water (e.g., Brooklyn Park and Champlain) but in other areas, <br />testing as shown very little yield potential. Where other aquifers are available (e.g., the Prairie du <br />Chien-Jordan aquifer system), the Franconia-Ironton-Galesville (FIG) Aquifer is not tapped but <br />P:\Mpls\23 MN\71\2371 105 Wa[er Supply Alternative Study\FinalDeliverables\Alternatives_Report_final.doc I Z <br />Figure 7 Conceptual Cross Section of Aquifers, Aquitards, and Groundwater Flow <br />