USGS Water-Year Summary 2024
352341090213101 09N07E21BBB1
Mississippi embayment aquifer system
500-foot Sand (Memphis Aquifer)
LOCATION - Lat 35°23'41.22", long 90°21'30.65" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 NW 1/4 sec.21, T.9 N., R.7 E., Crittenden County, AR, Hydrologic Unit 08020203, and near Heafer.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 604 ft. Upper casing diameter 6.25 in; top of first opening 584 ft, bottom of last opening 604 ft.
DATUM - Land-surface datum is 216 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of 8-in steel well protector at cutoff wheel marks, 2.17 ft above land-surface datum, Feb. 2, 2006 to Nov. 8, 2023; Hole in board above well, 2.31 ft above land-surface datum, Apr. 12, 2007 to present; Top of 8-in steel well protector at cutoff wheel marks, 2.17 ft above land-surface datum, Nov. 8, 2023 to present.
PERIOD OF RECORD - Continuous from Jun 2006 to current year.
GAGE - Continuous transducer with modem telemetry.
Land Surface Datum of Well is 215.16 ft above NAVD of 1988, (Reference Frame NAD_83 (2011) (EPOCH:2010.0000) GEOID18), Tape up to MP = 2.142.16 ft.
Prior to August 21, 2024, the LSD of Well was 216.00 ft NGVD of 1929 (Determined from topographic map).
COOPERATION - Arkansas Natural Resources Commission.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 23.03 ft below land surface datum, Jun 5, 6, 10, 2010; lowest water level, 28.14 ft below land surface datum, Nov 7, 2007.