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Well Drillers Near New London, Wisconsin

The typical subsurface geology in the New London, WI region consists of a surficial sequence of clay-rich and sandy sediments, grading to glacial sand and gravel, then a thick series of sand and interbedded clays, locally underlain by sandstone or, less often, limestone or granite at greater depth.

Showing contractors within 60 miles of New London. 37 results found.

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A geological estimate for the New London area.

120 ft

Typical Well Depth

50 ft

Static Water Level

Rotary - Mud Circulation

Recommended Method

Detailed Summary

Based on the synthesis of typical well logs from New London, the prevalent stratigraphic sequence consists of: a thin organic-rich soil layer, underlain by clay (often with stones or gravel), transitioning to sand and gravel or more massive sand (sometimes interbedded with clay), then locally a thick clay interval or firm hardpan, followed by sandstone (soft-to-firm), and in some areas underlain by limestone or crystalline basement (granite) at greater depths. Casing commonly extends through unconsolidated material to just into the bedrock. Static water level is generally found between 20 and 92 feet below ground surface. A typical residential well for sustainable yields of 5-15+ GPM is completed at 100-150 feet, often targeting the sand or upper bedrock aquifers. Higher capacity wells (or those requiring more drought protection) may be drilled deeper, up to 200-275 ft or more, especially where deeper sandstone or bedrock units are present.

Expected Geological Layers

Depth (Feet)Formation TypeDescriptionCharacteristics
0 – 1 ftSoil/OrganicBlack to brown organic-rich topsoil or silty soilColor: Black/Brown
Hardness: Soft
1 – 20 ftClay (w/ stones, gravel in places)Brown to tan clay, sometimes silty, occasionally with stones or gravel influence; hard or firm in places (may include hardpan near base)Color: Brown/Tan
Hardness: Firm/Hard
20 – 40 ftSand & Gravel LayerSand and gravel, some clay or stones; main glacial outwash aquifer zoneColor: Varied brown/yellow
Hardness: Medium
40 – 80 ftSand (medium to fine, with local clay)Sand (medium to fine); locally interbedded with clay layers; may include transition to sandstone at baseColor: Tan/White/Brown
Hardness: Medium/Soft
80 – 100 ftClay or Hardpan Interbed (local)Clay, hardpan, or mixed sand/clay (not present in all wells, transitional)Color: Tan/Brown/Gray
Hardness: Firm/Hard
100 – 160 ftSandstone/Dense SandSandstone (soft to firm), occasionally interbedded or grading from dense sand; regionally prevalent aquifer unitColor: White/Tan
Hardness: Soft to Moderate
160 – 240 ftBedrock: Sandstone/LimestoneFirm sandstone, sometimes limestone in places; base of common well depthsColor: White/Buff/Gray
Hardness: Firm/Hard
240 – 275 ftBasement Rock (Granite/local)Granite or other crystalline rock encountered at depth in a subset of wells; marks effective well depth limitColor: Pink/Gray
Hardness: Very Hard