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Randolph, Wisconsin

Well Drillers Near Randolph, Wisconsin

The Randolph area features a consistent geological profile of shallow clay over glacial gravels and/or silty clay, transitioning to thick limestone/dolomite, then extensive sandstone, sometimes interbedded with shale.

Showing contractors within 60 miles of Randolph. 100 results found.

Typical depth
130 ft
Water table
30 ft
Contractors
100

100 Contractors

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View Local Geology Report

A geological estimate for the Randolph area.

Typical Well Depth
130 ft
Static Water Level
30 ft
Recommended Method
Rotary - Mud Circulation

Detailed Summary

Based on reviewed well logs in the Randolph area and nearby communities, the typical subsurface profile starts with thin clay (often with gravel/silty materials), followed by a significant massive limestone/dolomite layer, and then a thick, water-bearing sandstone formation that serves as the main aquifer. Occasional shale interbeds may be noted in the transition from limestone to sandstone. The most common drill method is rotary with mud circulation. Residential wells typically reach depths of 120–140 feet to access sufficient, reliable yields. High-capacity wells often extend deeper to optimize yields from the sandstone aquifer.

Expected Geological Layers

Depth (Feet)Formation TypeDescriptionCharacteristics
0 – 5 ftClayStiff to silty clay, occasionally black dirt or with minor gravelColor: Brown/Black
Hardness: Firm
5 – 15 ftSilty Clay/GravelSilty clay with gravel, stones, occasional boulders; local valleys may have thicker depositsColor: Mixed
Hardness: Medium
15 – 80 ftLimestone/DolomiteLimestone or dolomite, occasionally with thin interbedded shale layersColor: Gray/Buff
Hardness: Hard
80 – 130 ftSandstoneFine to medium sandstone, commonly the main water-bearing aquifer, sometimes mixed with thin shale or limey layersColor: Light Brown/Tan
Hardness: Soft to Medium
130 – 175 ftSandstone (deeper)Extended sandstone zone, may include more shale or remain thick-bedded, often tapped for high-yield wellsColor: Buff/Tan
Hardness: Medium

Frequently Asked Questions

A typical residential well in the Randolph area is drilled to approximately 130 feet to ensure a reliable water supply of 5-15+ gallons per minute.

The static water level, or water table, is typically found around 30 feet below the surface in this region.

Based on reviewed well logs in the Randolph area and nearby communities, the typical subsurface profile starts with thin clay (often with gravel/silty materials), followed by a significant massive limestone/dolomite layer, and then a thick, water-bearing sandstone formation that serves as the main aquifer. Occasional shale interbeds may be noted in the transition from limestone to sandstone. The most common drill method is rotary with mud circulation. Residential wells typically reach depths of 120–140 feet to access sufficient, reliable yields. High-capacity wells often extend deeper to optimize yields from the sandstone aquifer.