LOCATION.--Lat 42°50'32.7", long
74°53'24.2" referenced to North American Datum of
1983, Otsego County, NY, Hydrologic Unit 02050101, near
Springfield Center.
WELL CHARACTERISTICS.--Depth 364 ft. Upper casing
diameter 6 in; top of first opening 19 ft, bottom of last
opening 364 ft.
DATUM.--Land-surface datum is 1,449.48 ft above North
American Vertical Datum of 1988. Measuring point: Top of
casing, 3.54 ft above land-surface datum, Sep. 13, 2019 to
present.
PERIOD OF RECORD.--September 2019 to current year.
REVISIONS HISTORY.--The elevation of land-surface datum
was revised from 1,450 ft (from topographic map) to 1,449.48 ft
above North American Vertical Datum of 1988 on Feb. 1, 2021,
based on an updated geodetic survey. Discrete groundwater
levels above National Geodetic Vertical Datum of 1929 for the
period Sept. 13, 2019 to Nov. 21, 2023 should not be used and
were removed on Feb. 26, 2024 because they utilized an
inaccurate geodetic datum reference. Discrete groundwater
levels above North American Vertical Datum of 1988 for the
period Sept. 13, 2019 to Nov. 21, 2023 were revised on Feb. 26,
2024, based on changes to the elevation of land-surface
datum.
GAGE.--Water-stage recorder--15 minute; periodic manual
measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level
recorded, 59.45 ft below land-surface datum, Dec. 18, 2024, but
was higher during this event beyond the limits of the
transducer; lowest water level, 118.89 ft below land-surface
datum, Sept. 28, 2019.