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Well Drillers Near Jefferson, South Dakota

Typical Jefferson residential wells encounter topsoil, thick clay, sand/gravel aquifer, and sandstone to bedrock within 280–350 ft.

Showing contractors within 60 miles of Jefferson. 11 results found.

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A geological estimate for the Jefferson area.

160 ft

Typical Well Depth

21 ft

Static Water Level

Rotary - Mud Circulation

Recommended Method

Detailed Summary

Analysis of well logs for the Jefferson region reveals a common stratigraphic sequence: a thin layer of topsoil, underlain by thick glacial clay, followed by a significant sand and/or gravel aquifer beginning around 60–120 ft, and then sandstone or bedrock often reached between 280 and 350 ft. The most productive residential wells for reliable yields (5–15+ GPM) are generally completed in the sand/gravel or basal sandstone intervals at 130–300 ft, with static water levels typically 15–25 ft below ground.

Expected Geological Layers

Depth (Feet)Formation TypeDescriptionCharacteristics
0 – 2 ftTopsoilsurface organicsColor: Dark brown
Hardness: Soft
2 – 22 ftClayglacial till, compact, occasionally siltyColor: Brown-grey
Hardness: Stiff
22 – 61 ftFine Sandfine sand, trace silt or gravel in placesColor: Tan-yellow
Hardness: Medium
61 – 119 ftSand & Gravelwater-bearing coarse sand and pea-to-medium gravelColor: Light tan
Hardness: Loose
119 – 287 ftWater-Bearing Sand/Gravel with Siltaquifer zone; mostly sand with intermixed gravel, some silt; main water sourceColor: Light grey-tan
Hardness: Loose
287 – 289 ftSandstonebedrock transition, fine-grained, occasional shale streaksColor: Light brown
Hardness: Hard