GROUND WATER ATLAS of the UNITED STATES
Iowa, Michigan, Minnesota, Wisconsin
HA 730-J
Silurian-Devonian aquifer
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Potential Well Yields
Figure 83 Hydrograph of well completed in the unconfined part
of the Silurian-Devonian aquifer at Cedar Rapids (83K)
downloadable tiff file J083.tif.gz (626K
compressed)
Figure 84 Hydrograph of well completed in the confined
part of the Silurian-Devonian aquifer at Dayton (128K)
downloadable tiff file J084.tif.gz (1.2MB
compressed)
Figure 85 Map showing probable yield of water to
wells in the Silurian-Devonian aquifer in Wisconsin (178K)
downloadable tiff file J085.tif.gz (1.6MB
compressed)
downloadable tiff file J083.tif.gz (626K
compressed) 
downloadable tiff file J084.tif.gz (1.2MB
compressed) 
downloadable tiff file J085.tif.gz (1.6MB
compressed)