LOCATION.--Lat 44°01'13.9", long
75°45'37.2" referenced to North American Datum of
1983, Jefferson County, NY, Hydrologic Unit 04150101, at Felts
Mills.
WELL CHARACTERISTICS.--Depth 45.3 ft. Upper casing
diameter 6 in; top of first opening 21 ft, bottom of last
opening 25 ft. Cased to 20.0 ft, open hole.
DATUM.--Land-surface datum is 618.05 ft above North
American Vertical Datum of 1988. Measuring point: Top of
extended-casing coupling, 2.41 ft above land-surface datum,
Sep. 18, 2013 to present.
PERIOD OF RECORD.--October 2008 to current year.
REVISIONS HISTORY.--Datum revised on Aug. 26, 2022. The
datum was originally reported as 611.74 ft above NGVD of 1929,
and corrected to 618.05 ft above NAVD of 1988.
GAGE.--Water-stage recorder--15 minute; periodic manual
measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level
(water years 2009-10, 2012, 2014-23), 10.42 ft below
land-surface datum, Oct. 30, 2017; lowest water level (water
years 2009-10, 2012, 2014-23), 23.67 ft below land-surface
datum, Sept. 29, 2020.
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