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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
050 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)
5070 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
70100 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
100180 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
1801500 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