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USGS 410430072202301 S 51176. 1


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> Site Information
LOCATION.--Lat 41°04'30.6", long 72°20'22.4" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at southeast corner of Ferry Road (Route 114) and Manwaring Road, Shelter Island.
WELL CHARACTERISTICS.--Depth 59 ft. Upper casing diameter 6 in; top of first opening 47 ft, bottom of last opening 57 ft.
DATUM.--Land-surface datum is 39.6 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of steel flange, 1.88 ft below land-surface datum, 37.72 ft above land-surface datum, Mar. 5, 1974 to present.
PERIOD OF RECORD.--June 1974 to current year.
GAGE.--Measurement with chalked steel tape by United States Geological Survey personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 8.88 ft above sea level, April 20, 2010; lowest measured, 2.42 ft above sea level, December 12, 1981.
> Rating Information
Available Parameters Period of Record
2020-01-25  2024-02-28


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Groundwater level above NGVD 1929, feet

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