During the winter season, ice conditions
may interfere with the acoustic signal used to measure flow velocity at
this site. In these instances, the resultant discharge may be less
accurate than discharge computed during open-water
Funding for this site is provided by:
43°08'30.2", long 77°36'58.7" referenced to North
American Datum of 1983, Monroe County, NY, Hydrologic Unit 04130003, on
left bank, adjacent to floodwall, about 400 ft upstream from bridge on
Ford Street, in Rochester.
PERIOD OF RECORD.--
April 1904 to September 1918, December 1919
to current year. Published as 04231500, "below Erie Canal at
Rochester," 1904-18, as 04232000, "at Driving Park
Avenue," 1919-68, and "at Rochester," 1969-2005.
Acoustic velocity meter and water-stage recorder.
Acoustic velocity meter since 2005. Datum of gage is Barge Canal Datum
(1.08 ft below NGVD of 1929). April 1904 to December 1910, nonrecording
gage, and December 1910 to September 1918, water-stage recorder, at
site 1.9 mi upstream at datum 506.85 ft, Barge Canal datum. December
1919 to Apr. 4, 1927 (in Rochester Gas & Electric Corporation power
plant), and Apr. 4, 1927 to June 19, 1956, at site 3.1 mi downstream,
at datum 250.00 ft above NGVD of 1929. June 20, 1956 to Sept. 30, 1969,
at site 3.1 mi downstream at datum 247.00 ft above NGVD of 1929. Oct.
1, 1969 to Sept. 30, 1985, at site 3.1 mi downstream at datum 246.24 ft
above NGVD of 1929. Oct. 1, 1985 to Sep. 30, 2005, at site 3.1 mi
downstream at datum 244.24 ft above NGVD of 1929 (245.00 ft Barge Canal
Occasional fluctuation caused by powerplant
downstream from station. New York State Erie (Barge) Canal crosses
river 1.8 mi upstream from station. Water diverted by the canal from
Niagara River basin is discharged into river from the west, the canal
again diverting a smaller amount of water from river to the east.
Additional regulation to some extent by Rushford Lake from July 1928 to
November 1951, at high flows by Mount Morris Lake (station 04224000)
since November 1951, and by Conesus Lake (station 04227980). Water year
2014: Records good except those below 800 ft3
/s, which are
fair, and those for estimated daily discharges, which are poor.
Water years 2015-16: Records fair except those for estimated daily
discharges and daily discharges below 2,000 ft3
/s, which are
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, since
construction of Mt. Morris Reservoir in 1951, 29,600 ft3
June 25, 1972, gage height, 15.89 ft, site and datum then in use. Since
water year 2006, maximum and minimum instantaneous discharges not
determined. Maximum daily discharge, since construction of Mt. Morris
Reservoir in 1951, 24,900 ft3
/s, June 25, 26, 1972; minimum
daily discharge, 76 ft3
/s, July 27, 2016
EXTREMES OUTSIDE PERIOD OF RECORD.--
Maximum discharge, about
/s, Mar. 18, 1865.
EXTREMES FOR PERIOD PRIOR TO REGULATION.--
prior to construction of Mt. Morris Reservoir in 1951, 48,300
/s, Mar. 30, 1916, gage height, 15.3 ft, site and datum
then in use; minimum discharge (at gage site located 3.1 mi
downstream), less than 10 ft3
/s, occurred during low-flow
periods in some years when power plant was shut down.
PERIOD OF DAILY RECORD1.--
December 2010 to current year.
SPECIFIC CONDUCTANCE: December 2010 to current year. pH: December 2010
to current year. DISSOLVED OXYGEN: December 2010 to current year.
TURBIDITY: December 2010 to current year.
sonde measures water temperature, specific conductance, pH, dissolved
oxygen, and turbidity at 15-minute intervals since December 2010.
In cooperation with the U.S.
Environmental Protection Agency's Great Lakes Restoration
EXTREMES FOR PERIOD OF DAILY RECORD1.--
WATER TEMPERATURE: Maximum, 29.9°C, July 24, 2011; minimum, -0.1°C, on
SPECIFIC CONDUCTANCE: Maximum, 1,250 uS/cm @ 25°C, Mar. 12, 2015;
minimum, 245 uS/cm @ 25°C, Feb. 5, 2013.
pH: Maximum, 8.6 , on many days; minimum, 7.3, Sept. 2, 5, 7,
DISSOLVED OXYGEN: Maximum, 15.8 mg/L, Aug. 19, 2015; minimum, 2.8 mg/L,
Jun. 30, 2016.
TURBIDITY: Maximum, 1,560 FNU, Jul. 16, 2015; minimum, 1.4 FNU, Oct.
1 Water-Quality Records
Peak Flow and Stage Information