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USGS Water-Year Summary 2024
263117082051002 L 2821.
Intermediate aquifer system
Hawthorn Limestone Aquifer
Hawthorn Limestone Aquifer
LOCATION - Lat 26°31'18.0", long 82°05'09.2" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 sec.26, T.45 S., R.22 E., Lee County, FL, Hydrologic Unit 03100103, 32 ft west of H. Stringfellow Road (County Road 767) and 6.6 mi south of Pine Island Road and 0.9 mi north of Saint James City Post Office.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 340 ft. Upper casing diameter 4 in; top of first opening 290 ft, bottom of last opening 340 ft. Artesian well, open hole 290 to 340 ft.
DATUM - Land-surface datum is 3.40 ft above National Geodetic Vertical Datum of 1929. Measuring point: top of 8-in. well casing, for pressure gage measurements, 6.55 ft above National Geodetic Vertical Datum of 1929, Oct. 1, 1978 to Aug. 24, 2012; top of 3/4-in. four-way brass fitting, for chalked-tape measurements, 7.07 ft above National Geodetic Vertical Datum of 1929, Feb. 5, 2009 to Aug. 24, 2012; top of 3/4 in. for-way brass fitting, for chalked tape or manometer measurements, 7.05 ft above National Geodetic Vertical Datum of 1929, Aug. 24, 2012 to Dec. 10, 2013; top of 8 in. well casing, for pressure gage measurements, 6.52 ft above National Geodetic Vertical Datum of 1929, Aug. 24, 2012 to Dec. 10, 2013; Top of red bolt on southwest station leg, 5.52 ft above National Geodetic Vertical Datum of 1929, Dec. 9, 2013 to present. See REMARKS.
PERIOD OF RECORD - October 1978 to August 2003 (monthly), August 2003 to current year. See REMARKS.
GAGE - Electronic data logger with pressure transducer. Prior to October 2018, satellite data collection platform, with pressure transducer.
REMARKS - Data from artesian wells measured with a calibrated pressure gage are considered accurate to +/- 0.1 ft. This artesian well is also used for salinity monitoring. The well lost pressure on December 11, 2006, to July 21, 2008. During this period, instrumentation was not available for continuous recording, and biannual salinity monitoring could not be accomplished during 2008. The wellhead was modified February 5, 2009, to allow access for pressure gage readings, chalked tape measurements, and salinity monitoring, throughout changes in potentiometric head. Repaired August 2012 and December 2013.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 19.4 ft NGVD, Oct. 24, 1995; lowest recorded, 2.42 ft below NGVD, May 15, 16, 2009.
