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LOCATION.--Lat 43°27'06", long 76°30'19" referenced to North American Datum of 1983, Oswego County, NY, Hydrologic Unit 04140203, on right bank at New York State Barge Canal (Oswego Canal) Lock 7 in Oswego, 0.8 mi upstream from mouth.
DRAINAGE AREA.--5,100 mi2.
PERIOD OF RECORD.--October 1900 to April 1906, October 1933 to current year. Monthly discharge only for some periods, published in WSP 1307. Prior to January 1904, published as "above Minetto" or "near Minetto." January 1904 to April 1906, published as "at Battle Island." Records for April 1897 to September 1900, published in WSP 65 and for October 1927 to September 1928, published in WSP 644, have been found to be unreliable and should not be used.
REVISED RECORDS.--WDR NY 78-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 245.12 ft above NGVD of 1929. Prior to October 1933, nonrecording gage at site about 6 mi upstream at different datum.
COOPERATION.--Records of lockages at Lock 7 provided by New York State Thruway Authority, record of elevations of Lake Ontario by U.S. Army Corps of Engineers, daily discharge records for Oswego River High Dam upstream by Niagara Mohawk Power Corp.
REMARKS.--Prior to 1933 and subsequent to 1972, flow in Oswego (Barge) Canal not included. A large amount of natural storage and some artificial regulation is afforded by the many large lakes and the Erie (Barge) and Oswego (Barge) Canal systems in the river basin. Large diurnal fluctuations at low and medium flow caused by powerplants upstream from station. Oswego River basin receives water from Erie (Barge) Canal through Lock 32 near Pittsford. Water may be diverted into or received from Mohawk River basin through Erie (Barge) Canal between New London and Utica. During part of year, entire flow from 45.5 mi2 of Mud Creek drainage area may be diverted from Chemung River basin into Keuka Lake in Oswego River basin. Nearly all of the flow from 14 mi2 of the Tioughnioga River basin may be diverted into De Ruyter Reservoir, in Oswego River basin. Water Year 2014: Records good except those for estimated daily discharges, which are fair.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 37,500 ft3/s, Mar. 28, 1936, includes daily mean discharge of canals; maximum gage height, 13.46 ft, Apr. 10, 1940; minimum discharge (river only), 30 ft3/s, Nov. 6, 1944.
PERIOD OF DAILY RECORD1.-- WATER TEMPERATURE: 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.
INSTRUMENTATION1.--ISCO refrigerated automatic sampler since July 2010. A YSI 6920-V2 continuous monitor with water temperature, specific conductance, pH, dissolved oxygen and turbidity since December 2010 provides 15-minute-interval readings.
COOPERATION1.--In cooperation with the U.S. Environmental Protection Agency's Great Lakes Restoration Initiative (GLRI).
REMARKS1.--YSI 6920-V2 turbidity record is subject to low end adjustments when values are below zero and 0.0 FNU may have occurred on days of missing record or instrument malfunction.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: Maximum, 29.5°C, July 17, 2012; minimum, -0.1°C, on several days during winter period.
SPECIFIC CONDUCTANCE: Maximum, 1,080 uS/cm @ 25°C, Feb. 20, 2011; minimum, 388 uS/cm @ 25°C, May 2, 2011. pH: Maximum, 9.2, on several days; minimum, 7.3, Jun. 28, 2012. DISSOLVED OXYGEN: Maximum, 15.9 mg/L, Feb. 26, 28, Apr. 17, 2012; minimum, 3.3 mg/L, Aug. 6, 2012. TURBIDITY: Maximum, 62 FNU, Sept. 7, 2011; minimum, 0.0 FNU, Sept. 14, 2012 [0.0 FNU may have occurred on days of missing record or instrument malfunction].
1 Water-Quality Records

Peak Flow and Stage Information
This station managed by the NY Water Science Center, Ithaca.

Available Parameters Available Period
All 7 Available Parameters for this site
00010 Temperature, water 2010-12-17  2016-05-30
00060 Discharge 2007-10-01  2016-05-30
00095 Specific cond at 25C 2010-12-17  2016-05-30
00065 Gage height 2016-01-31  2016-05-30
00400 pH 2010-12-17  2016-05-30
63680 Turbidity, Form Neph 2010-12-17  2016-05-30
00300 Dissolved oxygen 2010-12-17  2016-05-30

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Discharge, cubic feet per second

Most recent instantaneous value: 2,510   05-30-2016  18:45 EST
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Daily discharge, cubic feet per second -- statistics for May 30 based on 82 years of record more
Most Recent
Value May 30
Median Mean 75th
1200 2510 2700 4680 6270 9170 17600

Gage height, feet

Most recent instantaneous value: 3.39   05-30-2016  18:45 EST
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