Well Drillers Near Janesville, Wisconsin

A geological estimate for the Janesville area.

Detailed Summary

Based on a representative sample of well logs from the Janesville region, the typical geologic section comprises, from the surface downward: an initial surficial layer of fill or topsoil giving way quickly to thick sequences of sand with intermittent layers of gravel, hardpan, and clay to average depths of 120–160 ft. In some locations, coarser sand and gravel extend even deeper, up to 200–220 ft. Harder bedrock layers such as sandstone or limestone/dolomite may be encountered around 130–140 ft or deeper, but are not universal. Most residential wells supplying 5–15+ GPM terminate in the coarser sand/gravel sequences before hitting bedrock. Static water levels range widely but are most commonly found between 57 and 120 ft below ground surface. Rotary - Mud Circulation is the dominant drilling method, with continuous steel casing and granular bentonite or neat cement grout seals to casing depth.

Expected Geological Layers