LOCATION.--Lat 41°02'41", long 72°21'23" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at North Silver Beach Road, Shelter Island.
WELL CHARACTERISTICS.--Depth 30 ft. Upper casing diameter 2 in; top of first opening 20 ft, bottom of last opening 25 ft.
DATUM.--Land-surface datum is 8.50 ft above North American Vertical Datum of 1988. Measuring point: N/S of 2 inch PVC casing 0.34 ft below land surface datum, 8.16 ft above North American Vertical Datum of 1988, Sep. 23, 2009 to Aug. 26, 2024; Top of 2" PVC coupling, north edge, inside of black steel standup pipe, 11.582 ft above North American Vertical Datum of 1988, Aug. 26, 2024 to present.
PERIOD OF RECORD.--October 2012 to current year.
GAGE.--Water level recorder installed December 2022; 15-minute recording interval. Periodic manual measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level recorded 2.23 ft above NAVD of 1988, Apr. 5, 2024; lowest measured, 0.05 ft above NAVD of 1988, Dec. 27, 2017.

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