LOCATION.--Lat 41°03'17.5", long 71°53'52.1" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at north side of Montauk Point State Parkway (State Route 27), adjacent to intersection with Old Montauk Highway, Montauk. Located at Montauk State park Horse Stables, near sign.
WELL CHARACTERISTICS.--Depth 66 ft. Upper casing diameter 6 in; top of first opening 53 ft, bottom of last opening 56 ft.
DATUM.--Land-surface datum is 38.6 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of steel flange, 1.55 ft below land-surface datum, 37.05 ft above National Geodetic Vertical Datum of 1929, Oct. 11, 1973 to present.  
PERIOD OF RECORD.--January 1974 to current year. Unpublished records for January 1974 to September 1983 are available in files of the U.S. Geological Survey.
GAGE.--Water-level recorder installed February 2017; 15-minute recording intervals. Periodic manual measurements by USGS personnel.
REMARKS.--Water level affected by tidal fluctuation.
EXTREMES FOR PERIOD OF RECORD.--Highest water level recorded, 5.23 ft NGVD of 1929, Aug. 17, 2024; lowest measured, 2.34 ft above NGVD of 1929, July 21, 2011.

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