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41°39'03", long 73°56'42" referenced to North
American Datum of 1927, Dutchess County, NY, Hydrologic Unit 02020008,
on left bank at IBM pumping station, 2.3 mi south of Poughkeepsie, and
3.5 mi south of the Mid-Hudson bridge.
PERIOD OF RECORD.--
March 2002 to current year. Daily elevations
published since May 1992.
WDR NY-97-1: 1996.
Water-stage recorder and acoustic velocity meter. Datum
of gage is NGVD of 1929.
Prior to September 2012, discharge computed with an
uplooking acoustic velocity meter. Since September 2012, discharge
computed with a sidelooking acoustic velocity meter. Blanks in
discharge tables, July to October 2002 and July to October 2007, are
the result of the salt front adversely affecting measured velocity. All
other blanks in discharge tables are due to interruption of record.
Prior to October 2002, elevation published as maximum, minimum, and
mean elevation. Elevations are not corrected for changes in water
density. Blanks in elevation tables are the result of only one high or
low tide during a day or interruption of record.
EXTREMES FOR PERIOD OF RECORD.--
Maximum daily discharge, 240,000
/s, Aug. 29, 2011; maximum elevation recorded, 9.54 ft,
Oct. 29, 2012, but may have been higher during period of instrument
malfunction, outside elevation was 9.28 ft, from floodmarks; minimum
daily discharge, -24,900 ft3
/s, Oct. 14, 2003, but may have
been lower during period of missing record; minimum elevation, -4.38
ft, Mar. 14, 15, 1993.
PERIOD OF DAILY RECORD1.--
SPECIFIC CONDUCTANCE: May 1992 to current year.
WATER TEMPERATURE: May 1992 to current year.
specific-conductance satellite and telephone telemeter provides
Temperature readings prior to Oct. 1,
2007, rounded to the nearest 0.5 °C. Specific conductance occasionally
affected by local runoff.
EXTREMES FOR PERIOD OF DAILY RECORD1.--
CONDUCTANCE: Maximum, 2,900 μS/cm at 25 °C, Sept. 8, 2002;
minimum, 96 μS/cm at 25 °C, Jan. 30, 1995.
WATER TEMPERATURE: Prior to Oct. 1, 2007--Maximum, 29.0 °C, Aug. 14,
2005; minimum, 0.0 °C on many days during winter periods, except
WATER TEMPERATURE: After Oct. 1, 2007--Maximum, 28.3 °C, July 24, 2010,
July 21, 2013; minimum, -0.2 °C, Feb. 6, 7, 2010, several days during
February 2011 and 2014 winter period.
1 Water-Quality Records
Peak Flow and Stage Information
Hudson River Sediment Flux Project
Hudson River Salt-Front information.