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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.
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USGS Water-Year Summary 2024
410316072192901 S 51177. 1
Northern Atlantic Coastal Plain aquifer system
Glacial Aquifer, Upper
Glacial Aquifer, Upper
LOCATION - Lat 41°03'16.5", long 72°19'27.8" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at east side of Route 114, 58 ft north of Valley Road, Shelter Island.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 39 ft. Upper casing diameter 4 in; top of first opening 27 ft, bottom of last opening 37 ft.
DATUM - Land-surface datum is 17.5 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of steel flange, 1.58 ft below land-surface datum, 15.92 ft above National Geodetic Vertical Datum of 1929, Feb. 28, 1974 to present.
PERIOD OF RECORD - June 1974 to March 1995, November 2001 to current year.
GAGE - Periodic manual measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 6.94 ft above NGVD of 1929, Apr. 7, 2010; lowest measured, 1.90 ft above NGVD of 1929, Dec. 10, 1980.
