LOCATION.--Lat 40°49'32", long
73°05'59" referenced to North American Datum of 1927,
Suffolk County, NY, Hydrologic Unit 02030202, at Duncan Avenue
and Portion Road, in pumping center, in recorder shelter, Lake
WELL CHARACTERISTICS.--Depth 855 ft. Upper casing
diameter 4 in; top of first opening 840 ft, bottom of last
opening 850 ft. Datum of gage is NGVD of 1929.
PERIOD OF RECORD.--October 1968 to current year.
Unpublished records for October 1968 to September 1975 are
available in files of the U.S. Geological Survey.
GAGE.--Water-level recorder installed August 1986;
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, 54.81 ft above NGVD 29, May 14 and 15, 2010; lowest
recorded, 43.06 ft above NGVD 29, August 28, 2017.