LOCATION.--Lat 42°37'43", long
78°07'08" referenced to North American Datum of 1927,
Wyoming County, NY, Hydrologic Unit 04130002, on Letchworth
Central School property, on County Road 40, 0.1 mi south of
School Road, and 1.0 mi southeast of Gainesville.
WELL CHARACTERISTICS.--Depth 20.3 ft. Upper casing
diameter 6 in; top of first opening 20 ft, bottom of last
opening 20 ft. Cased to 20 ft, open end. Elevation of
land-surface datum is 1,606.76 ft above NGVD of 1929 and
1,606.36 ft above NAVD of 1988.
DATUM.--Land-surface datum is 1,606.36 ft above North
American Vertical Datum of 1988. Measuring point: Top of
casing, 2.62 ft above land-surface datum, Jun. 3, 2016 to
present; Top of flange, 2.63 ft above land-surface datum, Jun.
3, 2016 to present; Top of shelter shelf, 2.65 ft above
land-surface datum, Jun. 3, 2016 to present.
PERIOD OF RECORD.--May 1974 to current year. Records for
May 1974 to September 1976 are unpublished and available in
files of the Geological Survey.
REVISIONS HISTORY.--WDR NY-91-3: 1990.
GAGE.--Water-stage recorder--15 minute; periodic
measurements by USGS personnel.
REMARKS.--Well drilled May 1974 as a replacement for
423743078070801 (local number Wo-2), located 25 ft southeast,
which had a period of record from November 1965 to May 1974
(unpublished). Water level may be affected by periodic
water-quality sampling by county health department. Satellite
water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level,
7.89 ft below land-surface datum, Mar. 5, 1976; lowest water
level, 14.00 ft below land-surface datum, Nov. 3, 1974.
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