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Well Drillers Near Oak Creek, Wisconsin

Oak Creek region geology is dominated by thick clay and hardpan glacial tills over sand/gravel aquifers, with Silurian limestone/dolomite or deeper Cambrian/Ordovician bedrock (where drilled deep). Most residential wells are cased to sand/gravel or shallow dolomite. Typical flowing static water levels range 40–100 ft bgs and yield 5–30+ GPM.

Showing contractors within 60 miles of Oak Creek. 42 results found.

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A geological estimate for the Oak Creek area.

100 ft

Typical Well Depth

70 ft

Static Water Level

Rotary - Mud Circulation

Recommended Method

Detailed Summary

A representative geologic profile for Oak Creek and adjacent areas indicates a surface layer of clay (sometimes with silt, brown/blue color, and/or hardpan) averaging 45–70 feet thick. This is underlain by sand, gravel, or sandy gravel units—commonly water-bearing—spanning 10–20 feet in thickness. In some locations, discontinuous clay or hardpan layers occur within or above the sand/gravel. Below 70–120 feet, Silurian or Ordovician limestone/dolomite is encountered. Deeper municipal or high-capacity wells may penetrate additional sequences of shale and dolomite, reaching several hundred to >1000 feet into Cambrian/Ordovician sandstones. Most residential wells with 5–15+ GPM yields are screened or open in the sand/gravel aquifers or upper dolomite, at total depths of 65–180 feet, with static water levels around 40–98 feet bgs.

Expected Geological Layers

Depth (Feet)Formation TypeDescriptionCharacteristics
0 – 50 ftClay (glacial till, silt, hardpan)Brown, blue, grey clay; some with silt or hardpan. Occasional gravely or rocky inclusions. Non-caving to slightly caving.Color: Brown/blue/grey
Hardness: Soft to hard (hardpan layers present in some logs)
50 – 70 ftSand and/or Sandy GravelClean sand, sandy gravel, and occasional broken rock. Main aquifer zone for residential wells; highly permeable; water-bearing.Color: Tan/yellow/grey
Hardness: Loose to moderately compact
70 – 100 ftSandy Gravel/Gravelly clay transition or occasional HardpanTransition zone between sand/gravel and underlying consolidated rock; possible clay/rock mix or hardpan.Color: Variegated
Hardness: Firm
100 – 180 ftLimestone/Dolomite (Silurian, Ordovician)Grey to tan limestone or dolomite; fractured in places; yields water to some wells. May be absent in shallow-only wells.Color: Grey/tan
Hardness: Hard
180 – 1500 ft(Deep bedrock) Dolomites, Shales, and Cambro-Ordovician SandstonesUnits include (in order): deeper dolomites, local shales, and water-bearing sandstones (Tonti, Wonewoc, Eau Claire, Mount Simon) in wells >500 ft, only present in high capacity/municipal wells.Color: Grey/tan/red
Hardness: Very hard