LOCATION.--Lat 41°05'16", long
72°20'09" referenced to North American Datum of 1927,
Suffolk County, NY, Hydrologic Unit 02030202, at east side of
Manhanset Road, 143 ft north of Cobbets Lane, Shelter
Island.
WELL CHARACTERISTICS.--Depth 74 ft. Upper casing
diameter 6 in; top of first opening 62 ft, bottom of last
opening 72 ft.
DATUM.--Land-surface datum is 28.4 ft above National
Geodetic Vertical Datum of 1929. Measuring point: Top of
casing, 1.45 ft below land-surface datum, 26.95 ft above
land-surface datum, Jul. 16, 1974 to present.
PERIOD OF RECORD.--July 1974 to current year.
GAGE.--Water-level recorder installed July 2022;
15-minute recording interval. Periodic manual measurements made
by USGS personnel.
REMARKS.--Cellular water-level telemeter at
station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level
measured, 7.05 ft above sea level, April 20, 2010; lowest
measured, 1.71 ft above sea level, March 9, 1981.
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