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Water-Year Summary for Site 331346092391101

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Available Parameters
72019 Water level, depth LSD(Mean)  

Water year 2025: 2025-10-01 to 2026-09-30
 
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USGS Water-Year Summary 2025
331346092391101 17S15W28DBA1
Mississippi embayment aquifer system
Sparta Sand
LOCATION - Lat 33°12'46.08", long 92°39'09.78" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 SE 1/4 sec.28, T.17 S., R.15 W., Union County, AR, Hydrologic Unit 08040201, and at El Dorado.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 668 ft. Upper casing diameter 16 in; top of first opening 588 ft, bottom of last opening 668 ft.
DATUM - Land-surface datum is 228.08 ft above North American Vertical Datum of 1988. Measuring point: MP HOLE IN PUMP BASE, 3.5 ft above land-surface datum, Jul. 1, 1943 to Oct. 17, 2006; Unknown, 1.73 ft above land-surface datum, Jul. 22, 2008 to present; top edge of metal casing, 0.6 ft below land-surface datum, Jan. 10, 2018 to present; MP of 1.88 ft. Hole in middle of steel plate, 1.88 ft above land-surface datum, Jan. 5, 2022 to present. Top of casing, 0.0 ft above land surface.
PERIOD OF RECORD - Annual 1943, 1944, 1982 to 1990, 1993, and 1999. Continuous Mar 2000 to current year.
GAGE -

Continuous transducer with data logger.

As of October 2024, RP1 is 228.08 ft above NAVD 88 with an M.P. 0.24' above RP1 (Reference Frame NAD_83 (2011) (EPOCH:2010.0000) GEOID18).

Prior to 10/10/2024 the datum of well was 231 NAVD88.

COOPERATION - Union County Conservation District.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 200.00 ft below land surface datum, Jul 15, 1943; lowest water level, 423.72 ft below land surface datum, Mar 3, 1999.