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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
331940081443501 AK- 430
Southeastern Coastal Plain aquifer system
Middendorf Formation
Middendorf Formation
LOCATION - Lat 33°19'40", long 81°44'35" referenced to North American Datum of 1927, Aiken County, SC, Hydrologic Unit 03060106, at Savannah River Site near Aiken.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 605 ft. Upper casing diameter 18 in; top of first opening 390 ft, bottom of last opening 600 ft.
DATUM - Land-surface datum is 357 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing at land-surface datum, 0.00 ft above land-surface datum, Feb. 20, 1966 to present.
PERIOD OF RECORD - May 1952 to November 1994, October 1995 to April 1996, February 1997 to current year. Prior to October 1970, maximum and minimum only. Prior to 1974, published as AK-2 or LA-4.
GAGE - Data collection platform--60 minute collection interval.
EXTREMES FOR PERIOD OF RECORD - Highest daily water level, 144.77 ft below land-surface datum, Feb. 23, 1966; lowest water level, 165.81 ft below land-surface datum, Jan. 19, 2013.
