Charlotte, Eaton County, MI typical subsurface profile: thick clay overburden, substantial sand/gravel and mixed layers, overlying variable sandstone or shale bedrock.
Showing contractors within 60 miles of Charlotte. 81 results found.
A geological estimate for the Charlotte area.
Typical Well Depth
Static Water Level
Recommended Method
Synthesizing six representative well logs for the Charlotte, MI region reveals a typical succession: an upper clay (sometimes with sand or gravel) 20–40 ft thick, underlain by a complex zone of interbedded clay, sand, and substantial gravel deposits (occasionally with stones) extending to about 90–110 ft. Below this, there is typically a sandstone or shale bedrock (sometimes mixing with gravel or sand), often extending to at least 120–140 ft. Sand and gravel zones (occasionally water-bearing) are most likely the best aquifers. A typical residential well is screened or completed below these thick clays, frequently drawing from sand/gravel or shallow sandstone from 90–130 ft. Static water levels average in the mid-20s ft below grade. Wells are rotary-drilled, cased (PVC or steel) to about 70–120 ft, and grouted with bentonite slurry.
Depth (Feet) | Formation Type | Description | Characteristics |
---|---|---|---|
0 – 12 ft | Clay/Loam | Brown to gray clay or silty loam; massive, plastic, locally sandy or with occasional stones. | Color: Brown/Gray Hardness: Soft-Plastic |
12 – 40 ft | Clay (with intermittent sand or gravel) | Gray or brown clay, with layers or lenses of sand or gravel; locally includes stones/cobbles. | Color: Brown-Gray Hardness: Stiff |
40 – 85 ft | Sand & Gravel (with occasional clay layers) | Gray or tan, clean to mixed, moderate to coarse sand and gravel, some interbedded clay or silt layers. | Color: Gray-Tan Hardness: Medium-Loose |
85 – 115 ft | Clay/Gravel Mix | Mostly gray clay with varying amounts of gravel, sand, and some stones; transitions downward. | Color: Gray Hardness: Firm |
115 – 140 ft | Sandstone/Shale (Bedrock) | Very fine sandstone or silty shale; moderately hard bedrock, sometimes with water-bearing fractures. | Color: Gray or Tan Hardness: Hard |