
Cribley Drilling Company Inc
Dexter, MI48130-9786
Dexter-area typical well geology features a surficial sand or clay unit, transitioning to alternating sand/gravel aquifers and clay/silt confining layers, with glacial sediments giving way to sandstone/limestone bedrock below ~85-130 ft. Most productive residential wells are completed in deep sand/gravel, occasionally in sandstone or limestone.
Showing contractors within 60 miles of Dexter. 75 results found.
A geological estimate for the Dexter area.
Typical Well Depth
Static Water Level
Recommended Method
In the Dexter region, most wells encounter a sequence beginning with a surficial sand, loam, or clay layer (typically yellow/brown, ~5-25 ft thick) followed by interbedded layers of sand/gravel aquifer material and clay (both soft and hard) down to 60–80 ft. From 60–90 ft, cemented sand/gravel, sandstone, or compacted clay may appear, especially in deeper wells. Bedrock, generally as sandstone or limestone, is reported at ~85–136 ft. Most residential wells (5–15+ GPM) are screened in the major sand/gravel aquifer lying between 40 and 90 ft. Static water levels range from 15 to 35 ft below grade. Modern construction prefers rotary drilling, with 4–5 inch PVC or steel casing, and bentonite slurry grout to the top of screen or bedrock.
Depth (Feet) | Formation Type | Description | Characteristics |
---|---|---|---|
0 – 8 ft | Sand or Loam/Fill | Yellow/brown sand, loam, or artificial fill, sometimes mixed with clay. | Color: Yellow/Brown Hardness: Soft |
8 – 26 ft | Clay (varying hardness) | Yellow, blue, or gray clay; may be soft or hard; occasional silt inclusions. | Color: Yellow/Gray/Blue Hardness: Soft to hard |
26 – 56 ft | Sand & Gravel (aquifer zone) | Sand and gravel, sometimes interbedded with clay or minor silt. Main water-bearing aquifer for residential supply. | Color: Yellow/Gray Hardness: Loose to medium |
56 – 80 ft | Clay, hard/blue or interbedded clay/gravel | Glacial hard clay, blue or gray, sometimes containing fine sand or gravel or listed as 'cemented' or 'compact'. Acts as confining layer. | Color: Blue/Gray Hardness: Hard |
80 – 90 ft | Sand & Gravel / Cemented Zone | Coarser sand and gravel, sometimes reported as cemented or mixed with gravel/sandstone. | Color: Varied (white, gray) Hardness: Cemented to loose |
90 – 130 ft | Sandstone, Limestone, or Shale (Bedrock) | White/gray sandstone or limestone; sometimes with shale partings at top; underlying glacial till. Yields water in deeper wells. | Color: White/Gray/Black (shale) Hardness: Hard |