LOCATION.--Lat 44°03'09.9", long
73°27'12.6" referenced to North American Datum of
1983, Essex County, NY, Hydrologic Unit 04150408, on west shore
at boat launch near mouth of Mill Brook and 0.5 mi north of
railroad station, in Port Henry.
PERIOD OF RECORD.--October 1997 to September 1999, April
2015 to current year.
GAGE.--Water-stage recorder and digital weighing
precipitation gage. Datum of gage is NGVD of 1929. To convert
elevations to NAVD of 1988, subtract 0.60 ft.
REMARKS.--Area of lake surface about 490 mi². Total
volume below 92.5 ft elevation, reported by Lake Champlain
Studies Center, 902.2 bil ft³.
EXTREMES FOR PERIOD OF RECORD.--Maximum elevation,
101.90 ft, Apr. 4, 5, 1998; minimum, 93.23 ft, Oct. 16,
2016.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum elevation,
about 103.1 ft, during period May 6-9, 2011, from
floodmark.
PERIOD OF RECORD (CLIM).--April 2015 to current
year.
INSTRUMENTATION (CLIM).--Unshielded, 400 square
centimeter collecting area, digital weighing precipitation
gage, mounted on pedestal with top of collector 5 ft above
ground.
EXTREMES FOR PERIOD OF RECORD (CLIM).--Maximum daily
precipitation, 2.24 inches, May 29, 2016.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE:
October 1997 to September 1999, October 2017 to current
year.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER
TEMPERATURE: Maximum, 26.2 °C, Aug. 3, 2019; minimum, -1.2
°C, Feb. 25, 26, 2018.
1 Water-Quality Records