Well Drillers Near Hartford, South Dakota

A typical residential well in the Hartford area is drilled to approximately 18 feet to ensure a reliable water supply of 5-15+ gallons per minute.

The static water level, or water table, is typically found around 10 feet below the surface in this region.

Based on a synthesis of well logs and test borings throughout the Hartford (Minnehaha County) area, the most representative geologic profile consists of an upper clay/silt (often mottled or silty clay) layer from surface to 2–4 ft, occasionally including some fill/topsoil. This is underlain by a medium-fine sand to very coarse sand and gravel aquifer, typically from ~4 ft to 15–23 ft. The sand/gravel unit is variably sorted, with finer sand lenses and pebble/cobble intervals, showing signs of moderate oxidation. Water table is generally at 9–15 ft. The sand/gravel is in turn underlain by a thick clay or silty clay (often gray-brown to gray) which serves as a confining bed below ~20–30 ft. Most residential and monitoring wells terminate within the sand/gravel. Casing depths, grout, and sealing procedures confirm this arrangement. Occasional thin silt or minor gravel zones occur but are less consistent. For 5–15+ GPM production, wells are typically 15–25 ft deep, screened in sand/gravel above the lower clay.