Well Drillers Near Marion, South Dakota
The typical Marion area well passes through topsoil, yellow and blue/brown clays, with main aquifers in sand and gravel below 170-300 ft; final depths often reach 300-350 ft, with static water 50-80 ft below surface.
Showing contractors within 60 miles of Marion. 16 results found.
- Typical depth
- 180 ft
- Water table
- 60 ft
- Contractors
- 16
16 Contractors
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View Local Geology Report
A geological estimate for the Marion area.
- Typical Well Depth
- 180 ft
- Static Water Level
- 60 ft
- Recommended Method
- Rotary - Mud Circulation
Detailed Summary
Based on synthesis of multiple well logs in the Marion region of Turner County, SD, the typical geological sequence begins with a thin layer of topsoil, underlain by a considerable section of yellow and blue/brown clay (commonly 15-120 ft thick). This is followed by sand and local gravel/sandstone units, often intermittently layered with more clay. Deeper wells commonly penetrate additional clay and occasional till or hardpan before encountering thicker sand/gravel aquifers generally between 170 and 300 ft. Substantial yields (5–15+ GPM for residential use) are most often from sand/gravel layers in this interval. Bedrock or hard conglomerate (occasionally granite or cemented material) may be found below 300-350 ft. Static water levels are typically 50–80 ft below land surface. Typical residential wells are cased to the base of the aquifer layer.
Expected Geological Layers
| Depth (Feet) | Formation Type | Description | Characteristics |
|---|---|---|---|
| 0 – 2 ft | Topsoil/Fine Silty Sand | Soft, organic-rich, may include fill or fine sand | Color: Black/Brown Hardness: Soft |
| 2 – 30 ft | Clay (Silty/Lean, sometimes yellow) | Plasticky, sometimes mottled, may include a little gravel | Color: Yellow/Brown Hardness: Plastic/Soft |
| 30 – 80 ft | Clay (Blue or Brown) | Dense, low permeability, forms a confining unit | Color: Blue/Brown/Gray Hardness: Firm/Plastic |
| 80 – 120 ft | Sand (Minor gravel, some blue/sandy clay) | Fine to medium sand with localized clay or gravel, variably moist | Color: Tan/Blue/Brown Hardness: Loose/Medium |
| 120 – 170 ft | Clay/Sandy Clay | Mostly clay with some sandy or gravelly lenses, forming aquitard | Color: Blue/Brown/Gray Hardness: Firm |
| 170 – 300 ft | Sand & Gravel (Main aquifer zone) | Medium to coarse sand with significant gravel, major water-bearing strata; some zones interlayered with thin clay or silt | Color: Tan/Gray Hardness: Loose/Medium |
| 300 – 336 ft | Gravel/Clayey Gravel | Similar to above, increasing gravel content, possibly with clay layers | Color: Gray Hardness: Medium |
| 336 – 350 ft | Clay/Till/Hardpan | Dense clay, occasional pebbly till or hardpan, forms lower aquitard; may act as base for casing | Color: Gray/Brown Hardness: Hard/Very Firm |
| 350 – 490 ft | Hard Rock/Granite/Cemented Layer (locally variable, seldom used for water supply) | Hard, cemented or granitic rock, not typically water-bearing in domestic wells in this region | Color: Red/Gray Hardness: Very Hard |