Well Drillers Near Onalaska, Wisconsin

A geological estimate for the Onalaska area.

Detailed Summary

In the Onalaska region, the most representative well log profile consists of a shallow surficial layer that may be designated as topsoil or clay (~0-2 or ~0-15 ft), directly underlain by an extensive sand and gravel aquifer that typically extends from near the surface to between 65 and 130 feet deep. Occasional thin lenses of medium to coarse sand may be noted. Some locations transition into sandstone bedrock below the sand and gravel, although residential wells rarely penetrate far into bedrock. Rotary mud circulation is the dominant drilling method. Static water levels commonly range from 18 to 83 feet bgs, and typical residential wells for 5-15+ GPM yields are finished between 80 and 115 feet. Higher capacity wells may extend casing deeper but still usually terminate in the upper sand and gravel units.

Expected Geological Layers