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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
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USGS Water-Year Summary 2024
410439072173501 S 75432. 2
Northern Atlantic Coastal Plain aquifer system
Glacial Aquifer, Upper
Glacial Aquifer, Upper
LOCATION - Lat 41°04'40.0", long 72°17'34.2" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at south side of South Ram Island Drive and east side of Tuthill Drive, Shelter Island.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 29 ft. Upper casing diameter 2 in; top of first opening 24 ft, bottom of last opening 29 ft.
DATUM - Land-surface datum is 21 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 0.45 ft below land-surface datum, 20.55 ft above National Geodetic Vertical Datum of 1929, Mar. 19, 1990 to Aug. 28, 2024; Top of 2" PVC casing, north edge, inside of black steel standup pipe, 23.288 ft above National Geodetic Vertical Datum of 1929, Aug. 28, 2024 to present.
PERIOD OF RECORD - March 1990 to March 1995, November 2001 to current year.
GAGE - Water level recorder installed November 2020; 15-minute recording interval. Periodic manual measurements by USGS personnel.
REMARKS - Water level affected by tidal fluctuation.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 2.94 ft above NGVD of 1929, Apr. 4, 2024; lowest measured, 0.62 ft above NGVD of 1929, Feb. 19, 2013.
