Willmarth Well & Pump Services
Holcombe, WI54745
Typical Cornell area geology: surficial sand/sand & gravel, interbedded clay/silt, grading at depth to sand/gravel or local bedrock. Residential wells: ~40-70 ft, often finished in sand/gravel.
Showing contractors within 60 miles of Cornell. 22 results found.
A geological estimate for the Cornell area.
Typical Well Depth
Static Water Level
Recommended Method
A representative geologic profile for the Cornell region, based on multiple well construction logs, generally shows an upper zone of sand or silty sand, with significant intervals of sand & gravel. Interbedded and sometimes thick clay or silty clay layers are common but discontinuous. Deeper units typically remain unconsolidated sand/gravel, but in some outlying areas, granite or bedrock is encountered beyond ~40-70 ft, often deeper. The aquifer for most residential wells is in sand & gravel at moderate depth, with static water level commonly between 9 and 33 feet below ground surface, and tested yields commonly above 5 GPM, frequently 10-15 GPM or more.
Depth (Feet) | Formation Type | Description | Characteristics |
---|---|---|---|
0 – 15 ft | Sand (occasional Sandy Gravel) | Brown, caving, soft; may include surface silt or minor fine gravel. | Color: Brown Hardness: Soft to moderate |
15 – 23 ft | Sand & Gravel (occasional Hardpan, Gravel, or Silty Sand) | Coarse, brown, caving, some local hardpan/gravel; potential for high permeability. | Color: Brown Hardness: Moderate to hard |
23 – 41 ft | Clay or Clay/Silt (occasionally sandy or silty) | Brown to grey, non-caving or weakly caving, soft to hard; not always present or continuous. | Color: Brown/Grey Hardness: Soft to hard |
41 – 62 ft | Sand & Gravel (frequently silty) | Brown or grey, caving, soft to moderate; primary water-bearing unit for residential use. | Color: Brown/Grey Hardness: Soft to moderate |
62 – 71 ft | Silty Sand/Gravel, possible transition to coarser gravel or sand | Caving, brown/grey, soft to moderate; may include scattered hard layers or increase in coarseness at depth. | Color: Brown/Grey Hardness: Soft to hard |
71 – 75 ft | Occasional Bedrock (e.g., Granite - rare) | Hard, non-caving localized occurrence; mostly outside common residential well range. | Color: Grey/Pink Hardness: Hard |