The Wisconsin Geological and Natural History Survey (WGNHS) in cooperation with the U.S. Geological Survey (USGS) has maintained a ground-water observation-well network since 1946 (Zaporozec, 1996)

Production of sweet corn for processing in the Midwest is concentrated in Wisconsin, Minnesota, and Illinois with these three states accounting for over 60% of the 1991 national production of about 3.3 million tons.

In a 1996 report, I described the problems we had found with the use of rotary drilling mud & cuttings slurry as a grout. I reported we planned to continue to study these problems,

This report describes the use of a three-dimensional computer model to delineate zones of contribution for municipal water-supply wells in Dane County, Wisconsin.

Pumping from closely spaced wells in the Central Brown County area and the Fox Cities area near the north shore of Lake Winnebago has resulted in the formation of deep cones of depression in the vicinity of the two pumping centers.

Nitrate contamination has long been known to be a problem in Wisconsin's sandy aquifers with shallow depth to groundwater (Jackson and others, 1987). Recent data suggest that 10-20 percent of domestic wells in agricultural counties across the state exceed the drinking water standard