This station is operated in cooperation
Nassau County Department of Public
Lat 40°51'24.8", long 73°42'05.3"
referenced to North American Datum of 1983, Nassau County, NY,
Hydrologic Unit 02030201, Located at Helen Keller National Center for
Deaf-Blind Youths and Adults, 300 ft north of Middle Neck Road,
westernmost well, Sands Point.
Depth 396 ft. Upper casing diameter 6 in;
top of first opening 378 ft, bottom of last opening 388 ft. Datum of
gage is NGVD of 1929.
PERIOD OF RECORD.--
December 1960 to January 2000, January 2002
to current year. Unpublished records for August 1957 to September 1975
are available in the files of the U.S. Geological Survey.
Water-level recorder installed January 2003; 15-minute
recording interval. Periodic manual measurements made by USGS
Water level affected by tidal fluctuation and nearby
pumping. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--
Highest water level measured,
11.49 ft above NGVD 29, May 31 and June 1, 1983; lowest recorded, 50.36
ft below NGVD 29, August 27, 2016.