PROVISIONAL DATA SUBJECT TO REVISION
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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.
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.
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.
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