PROVISIONAL DATA SUBJECT TO REVISION
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Site Information
LOCATION.--Lat 40°58'56.53", long
72°32'40.88" referenced to North American Datum of
1983, Suffolk County, NY, Hydrologic Unit 02030202, at north
side of Main Road (State Route 25), east of Laurel Lake,
Mattituck.
WELL CHARACTERISTICS.--Depth 21.5 ft. Upper casing diameter 1.25 in; top of first opening 18.5 ft, bottom of last opening 21.5 ft. Datum of gage is NAVD of 1988.
DATUM.--Land-surface datum is 7 ft above North American Vertical Datum of 1988. Measuring point: top of casing, 8.42 ft above North American Vertical Datum of 1988, Dec. 10, 2015 to present.
PERIOD OF RECORD.--March 2014 to current year.
GAGE.--Water-level recorder installed May 2015; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level recorded, 5.85 ft above NAVD of 1988 (6.79 ft above NGVD of 1929), May 20, 2019; lowest measured, 1.42 ft above NAVD of 1988 (2.36 ft above NGVD of 1929), Dec. 10, 2015.
WELL CHARACTERISTICS.--Depth 21.5 ft. Upper casing diameter 1.25 in; top of first opening 18.5 ft, bottom of last opening 21.5 ft. Datum of gage is NAVD of 1988.
DATUM.--Land-surface datum is 7 ft above North American Vertical Datum of 1988. Measuring point: top of casing, 8.42 ft above North American Vertical Datum of 1988, Dec. 10, 2015 to present.
PERIOD OF RECORD.--March 2014 to current year.
GAGE.--Water-level recorder installed May 2015; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level recorded, 5.85 ft above NAVD of 1988 (6.79 ft above NGVD of 1929), May 20, 2019; lowest measured, 1.42 ft above NAVD of 1988 (2.36 ft above NGVD of 1929), Dec. 10, 2015.
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