Well Drillers Near Boyd, Wisconsin

A geological estimate for the Boyd area.

Detailed Summary

Based on a synthesis of representative local well logs, the common stratigraphy in the Boyd region is as follows: The uppermost 1–2 ft consists of topsoil or superficial gravel/clay. This is underlain by a thick layer (ranging from 30 to 45 ft) of brown sand, typically medium to coarse in grain size and variably mixed with gravel. This is the main aquifer zone for most domestic wells, providing moderate to high yields (5–15+ GPM common, often higher). Locally, there may be minor interbeds or grading to coarse or muddy sands and isolated clay lenses, but these do not represent the dominant sequence. At depths beneath ~45–50 ft, some wells encounter either sandstone (as a consolidated aquifer) or, less commonly, weathered/crystalline rock such as granite. Most residential wells are completed in the unconsolidated sand/gravel or uppermost sandstone at depths of 30–50 ft, screened accordingly, with static water levels commonly between 10–30 ft below ground. High-capacity (municipal or irrigation) wells that need additional yield may be extended into deeper sandstone or granite (up to 90–125 ft), but this is less typical for residential supply. Casing generally extends through the unconsolidated zone, and mud rotary is the predominant drilling method.

Expected Geological Layers