LOCATION.--Lat 40°45'53.3", long
73°35'12.0" referenced to North American Datum of
1927, Nassau County, NY, Hydrologic Unit 02030202, at northeast
corner of Post Avenue and Advent Street, Old Westbury.
WELL CHARACTERISTICS.--Depth 74.2 ft. Upper casing
diameter 2 in; top of first opening 64.2 ft, bottom of last
opening 69.2 ft.
DATUM.--Land-surface datum is 121 ft above National
Geodetic Vertical Datum of 1929. Measuring point: Well was
releveled on 06-25-2015, MP is Top of 2inch PVC casing, 120.29
ft above land-surface datum, Dec. 2, 2004 to present.
PERIOD OF RECORD.--December 2004 to current year.
GAGE.--Water-level recorder installed December 2004;
15-minute recording interval. Periodic manual measurements made
by USGS personnel.
REMARKS.--Replaced well N1616.2 in December 2004 near
same location. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level
recorded, 78.61 ft above NGVD of 1929, May 19, 26, 2010; lowest
recorded, 66.64 ft above NGVD of 1929, Oct. 12, 2005.