USGS Water-Year Summary 2025
354223088380201 Md:N-001
Mississippi embayment aquifer system
McNairy Formation
LOCATION - Lat 35°42'23", long 88°38'02" referenced to North American Datum of 1927, Madison County, TN, Hydrologic Unit 08010205,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 659 ft. Upper casing diameter 6 in; top of first opening 639 ft, bottom of last opening 659 ft.
DATUM - Land-surface datum is 556.44 ft above North American Vertical Datum of 1988. Measuring point: Unknown, 0 ft above land-surface datum, Jun. 30, 1949 to present; 3 hacksaw marks in top of steel well casting. Located under removable PVC covering, 1.88 ft above land-surface datum, Oct. 25, 2022 to present.