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USGS Water-Year Summary 2024
404834073403701 N 12507. 1
Northern Atlantic Coastal Plain aquifer system
Lloyd Aquifer
Lloyd Aquifer
LOCATION - Lat 40°48'34", long 73°40'37" referenced to North American Datum of 1927, Nassau County, NY, Hydrologic Unit 02030201, southwest side of Bonnie Heights Road, in Flower Hill Village Hall parking lot, Flower Hill.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 615 ft. Upper casing diameter 4 in; top of first opening 585 ft, bottom of last opening 605 ft.
DATUM - Land-surface datum is 118 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 0.84 ft below land-surface datum, 117.16 ft above land-surface datum, Jul. 12, 1995 to Mar. 13, 2024; Top of 4" coupling, 117.525 ft above land-surface datum, Mar. 13, 2024 to present.
PERIOD OF RECORD - September 1994 to March 1998, January 2002 to current year.
GAGE - Water-level recorder installed June 2016; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
REMARKS - Water level affected by nearby pumping. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 27.39 ft above NGVD of 1929, Apr. 24, 2024; lowest measured, 4.19 ft above NGVD of 1929, Aug. 23, 1995.
