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USGS 410516072200901 S 52084. 1

PROVISIONAL DATA SUBJECT TO REVISION

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> Site Information
LOCATION.--Lat 41°05'16", long 72°20'09" referenced to North American Datum of 1927, Suffolk County, NY, Hydrologic Unit 02030202, at east side of Manhanset Road, 143 ft north of Cobbets Lane, Shelter Island.
WELL CHARACTERISTICS.--Depth 74 ft. Upper casing diameter 6 in; top of first opening 62 ft, bottom of last opening 72 ft.
DATUM.--Land-surface datum is 28.4 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 1.45 ft below land-surface datum, 26.95 ft above land-surface datum, Jul. 16, 1974 to present.
PERIOD OF RECORD.--July 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, 7.05 ft above sea level, April 20, 2010; lowest measured, 1.71 ft above sea level, March 9, 1981.
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> Rating Information
Available Parameters Period of Record
  
2021-03-27  2022-09-27








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Groundwater level above NGVD 1929, feet


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