LOCATION.--Lat 40°52'51.2", long 73°18'06.5" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030201, at north side of Pulaski Road, 17 ft east of Rowena Lane, Northport.
WELL CHARACTERISTICS.--Depth 458 ft. Upper casing diameter 10 in; top of first opening 437 ft, bottom of last opening 457 ft. Land-surface datum is 205 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of hole in steel plate, 0.19 ft below land-surface datum.
DATUM.--Land-surface datum is 205 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of hole in steel plate, 0.19 ft below land-surface datum, 204.81 ft above National Geodetic Vertical Datum of 1929, Jan. 7, 1958 to present.  
PERIOD OF RECORD.--January 1958 to May 1959, April 1969 to current year.
GAGE.--Water-level recorder installed February 2017 to March 2019; 15-minute recording interval. Periodic manual measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 47.09 ft above NGVD of 1929, Jan. 7, 1980; lowest measured, 34.33 ft above NGVD of 1929, Apr. 14, 1969.

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