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USGS 405125073420702 N 6282. 2

PROVISIONAL DATA SUBJECT TO REVISION

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> Site Information
LOCATION.--Lat 40°51'24.8", long 73°42'05.3" referenced to North American Datum of 1983, Nassau County, NY, Hydrologic Unit 02030201, Located at Helen Keller National Center for Deaf-Blind Youths and Adults, 300 ft north of Middle Neck Road, westernmost well, Sands Point.
WELL CHARACTERISTICS.--Depth 396 ft. Upper casing diameter 6 in; top of first opening 378 ft, bottom of last opening 388 ft. Datum of gage is NGVD of 1929.
PERIOD OF RECORD.--December 1960 to January 2000, January 2002 to current year. Unpublished records for August 1957 to September 1975 are available in the files of the U.S. Geological Survey.
GAGE.--Water-level recorder installed January 2003; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
REMARKS.--Water level affected by tidal fluctuation and nearby pumping. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 11.49 ft above NGVD 29, May 31 and June 1, 1983; lowest recorded, 50.36 ft below NGVD 29, August 27, 2016.
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> Rating Information
This station managed by the NY Water Science Center Coram.

Available Parameters Period of Record
  
2003-01-11  2022-09-27








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Groundwater level above NGVD 1929, feet


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