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In the southern and western two-thirds of Caldwell County, more than three-quarters of drilled wells in uplands are adequate for a domestic supply. Yields as high as 50 gallons per minute have been reported from wells penetrating large solution channels or fault zones. In the low-lying areas of Eddy Creek, most wells are inadequate for domestic use, unless the well intercepts a major solution opening in the limestone; in that case the yield could be very large. Groundwater in the sandstone and shale-rich northeastern third of the county is not as prevalent as in the rest of the county, which is predominately limestone. Most wells in the northeastern part of the county are inadequate for a domestic supply. However, some wells in sandstone formations yield enough water for a domestic supply when located in areas bordering streams. Springs with flows ranging from a few gallons per minute to 2,000 gallons per minute are found in the county. Minimum flows generally occur in early fall, maximum flows in late winter. |
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