Well Drillers Near Windsor, Wisconsin

A geological estimate for the Windsor area.

Detailed Summary

A generalized geological profile for the Windsor, WI region (based on synthesis of recent well logs) is as follows: The uppermost material consists of a variable thickness (8–20 ft) of clay, often sandy or mixed with gravel, sometimes including surface fill. This is frequently underlain by lenses of sand, sandy gravel, or silty sand to depths of 30–50 ft, occasionally interbedded with peat or soft clay layers, especially in lower/valley areas. Beneath the overburden, a prominent sequence of sandstone begins, usually extending from about 40–65 ft to 125–180 ft, sometimes containing thin beds of shale or shaley sandstone (notably 60–130 ft). In several wells, limestone or dolomite beds are observed either immediately above or within the upper sandstone (commonly around 10–60 ft and/or 110–170 ft). While some locations report hard limestone/dolomite at depth, the regionally persistent and productive groundwater aquifer is the sandstone. Typical residential wells (supplying 10–20+ GPM) are completed into sandstone around 140–180 ft total depth, with static water levels most commonly observed between 40–75 ft below grade. Deeper high-capacity wells (irrigation/municipal) may extend to 200–300+ ft but have similar geologic layering. All sampled wells were constructed by rotary drilling with mud circulation and grouted with neat cement or mud.

Expected Geological Layers