USGS Water-Year Summary 2024
321603080432202 BFT-1810
Floridan aquifer system
Floridan Aquifer System
LOCATION - Lat 32°16'03", long 80°43'22" referenced to North American Datum of 1927, Beaufort County, SC, Hydrologic Unit 03050208, at Dolphin Head Recreation Park, on Hilton Head Plantation on Hilton Head Island.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 202 ft. Upper casing diameter 6 in; top of first opening 105 ft, bottom of last opening 202 ft.
DATUM - Land-surface datum is 14 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 0.80 ft above land-surface datum, Sep. 11, 1986 to present; Altitude of top of casing, distance above land-surface datum not defined, Oct. 4, 2016 to present.
PERIOD OF RECORD - September 1986 to current year.
GAGE - Data collection platform--60 minute collection interval.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 8.81 ft below land-surface datum, Oct. 8, 2016; lowest water level, 19.31 ft below land-surface datum, July 16, 1993.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 202 ft. Upper casing diameter 6 in; top of first opening 105 ft, bottom of last opening 202 ft.
DATUM - Land-surface datum is 14 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 0.80 ft above land-surface datum, Sep. 11, 1986 to present; Altitude of top of casing, distance above land-surface datum not defined, Oct. 4, 2016 to present.
PERIOD OF RECORD - Water years 1987 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE AT 170 FEET: February 1987 to September 1994 (discontinued).
SPECIFIC CONDUCTANCE AT 190 FEET: February 1987 to September 1994 (discontinued).
SPECIFIC CONDUCTANCE AT 200 FEET: February 1987 to current year.
WATER TEMPERATURE AT 200 FEET: February 1987 to current year.
INSTRUMENTATION - Water-quality multiprobe and data collection platform.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE AT 170 FEET: Maximum, 920 microsiemens, Apr. 14, 1988; minimum, 330 microsiemens, Aug. 9, 1990.
SPECIFIC CONDUCTANCE AT 190 FEET: Maximum, 5,720 microsiemens, June 25, 1994; minimum, 440 microsiemens, Dec. 11, 1987.
SPECIFIC CONDUCTANCE AT 200 FEET: Maximum, 21,600 microsiemens, June 4, 2019 and other days; minimum, 1,590 microsiemens, Feb. 27, 1987.
WATER TEMPERATURE AT 200 FEET: Maximum 21.3 C many days throughout period of record; Minimum 21.2 C many days throughout period of record.