
Koops Well Drilling Inc.
Holland, MI49423
The typical geology for the Holland, MI area features a surficial sand unit, followed by alternating sand and clay or sandy clay layers, with sand as the dominant aquifer material for most wells.
Showing contractors within 60 miles of Holland. 63 results found.
A geological estimate for the Holland area.
Typical Well Depth
Static Water Level
Recommended Method
Based on analysis of multiple representative well logs from the Holland, MI area, the most common stratigraphic sequence begins with a sand layer extending from the surface to roughly 6-8 meters. This is frequently followed by thin to moderate clay or sandy clay units, then alternating layers of sand and clay that extend to depths of about 80-100 feet, with sand forming the primary aquifer zone. The typical water table is shallow (5-20 ft below land surface), and residential wells targeting yields of 10-20 GPM are often screened in clean sand at 40-100 ft. Reliable, high-yielding wells are generally completed within sand units below any significant clay layers.
Depth (Feet) | Formation Type | Description | Characteristics |
---|---|---|---|
0 – 8 ft | Sand | Fine to medium sand | Color: Light Tan/Yellow Hardness: Loose |
8 – 25 ft | Clay/Silty Clay | Gray to brown clay, occasional sandy clay | Color: Gray/Brown Hardness: Firm |
25 – 32 ft | Sand | Medium to coarse sand, may contain minor gravel | Color: Light Tan Hardness: Loose |
32 – 40 ft | Clay and Sand (interbedded) | Thin beds of sand and clay, occasional gravel lenses | Color: Variegated Hardness: Mixed |
40 – 90 ft | Sand (main aquifer) | Dominantly medium to coarse sand, clean; best aquifer zone | Color: Light Tan Hardness: Loose |
90 – 97 ft | Sand with Clay or Gravel | Occasional clayey sand or sand with minor clay or gravel | Color: Dark Tan/Gray Hardness: Mixed |