10 pls. Scale 1:48,000 and smaller. Pl. 1, data-base; pl. 2, bedrock geology; pl. 3, surficial geology; pl. 4, bedrock topography and Quaternary stratigraphy; pl. 5, depth to bedrock and confining units of the St. Peter Sandstone; pl. 6, surficial hydrogeology; pl. 7, bedrock hydrogeology; pl. 8, sensitivity of the water-table system to pollution; pl. 9, sensitivity of the Prairie du Chien-Jordan aquifer to pollution; pl. 10, geology and well construction. Supplementary files include some ESRI GIS coverages pertaining to the geology plates.