USGS Water-Year Summary 2020
332205092433001 16S16W02ABC1 Smackover
Mississippi embayment aquifer system
LOCATION - Lat 33°22'05.89", long 92°43'28.60" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 NE 1/4 sec.02, T.16 W., R.16 W., Union County, AR, Hydrologic Unit 08040201, and at Smackover.
WELL CHARACTERISTICS - Depth 552 ft. Upper casing diameter 10 in; top of first opening 480 ft, bottom of last opening 550 ft.
DATUM - Land-surface datum is 116 ft above National Geodetic Vertical Datum of 1929. Measuring point: Vent pipe opening, marked on west side, 2.50 ft above land-surface datum, Dec. 9, 1964, to present.
PERIOD OF RECORD - Periodic water levels Dec 1964 and Mar 1965, semi-annual Apr 1967 to Oct 1980, annual 1981 to 1990, periodic 1993 to 2000, and continuous Jul 2003 to current year.
GAGE - Continuous transducer with modem telemetry.
COOPERATION - Union County Water Conservation Board.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 144.41 ft below land surface datum, Mar 31, 1971; lowest water level, 180.92 ft below land surface datum, Mar 3, 1999.