LOCATION.--Lat 41°27'14.8", long
73°33'12.1" referenced to North American Datum of
1983, Putnam County, NY, Hydrologic Unit 02030101, at Putnam
Lake.
WELL CHARACTERISTICS.--Depth 14 ft. Upper casing
diameter 2 in; top of first opening 5 ft, bottom of last
opening 15 ft. Well filled in from original depth of 15 ft,
cased to 5 ft (screen, 5 ft to 15 ft).
DATUM.--Land-surface datum is 426.46 ft above North
American Vertical Datum of 1988. Measuring point: Top of
extended casing, 2.9 ft above land-surface datum, Jun. 2, 2016
to Jun. 29, 2022; Top of extended casing, 2.92 ft above
land-surface datum, Jun. 29, 2022 to present.
PERIOD OF RECORD.--December 2006 to current year.
GAGE.--Water-stage recorder--15 minute; periodic manual
measurements by USGS personnel.
REMARKS.--Levels were processed August 2015, showing a
.50 ft change in the measuring point. A 0 ft to -.35 ft
correction was prorated and applied for Nov. 15, 2006 through
Oct. 5, 2011 to correct the water level data. This prorated
correction should be applied to the values published in Volume
1 of the Water Resources Data reports for those water years.
Various other datum corrections related to the MP movement
ranging between -.34 ft and -.44 ft have been applied between
Mar. 31, 2012 and Sept. 30, 2015. The values presented on USGS
web pages have been corrected. Satellite water-level telemeter
at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level,
1.07 ft above land-surface datum, Mar. 7, 2011; lowest water
level, 6.24 ft below land-surface datum, Oct. 20, 21,
2016.