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LOCATION.--Lat 43°09'44.4", long 76°21'45.7" referenced to North American Datum of 1983, Onondaga County, NY, Hydrologic Unit 04140201, on left bank at downstream side of bridge on State Highway 690 and 1.6 mi upstream from Baldwinsville.
DRAINAGE AREA.--3,130 mi².
PERIOD OF RECORD.--November 1949 to current year. November 1898 to December 1908, prior to construction of Erie (Barge) Canal, not equivalent to later records because of extensive development of Erie (Barge) Canal system. January 1909 to September 1925 (gage heights only) in reports of State Engineer and Surveyor. Prior to October 2014, published as "at Baldwinsville" (04237500).
GAGE.--Acoustic velocity meter and water-stage recorder. Datum of gage is 370.00 ft above NAVD of 1988. Prior to Apr. 1, 2019, at datum 70.00 ft lower. Prior to October 2014, base water-stage recorder at site 1.6 mi downstream and, prior to October 1996, auxiliary water-stage recorder at site 1,500 ft downstream from base gage at datum 360.80 ft above NAVD of 1988 (VERTCON), 361.38 ft above NGVD of 1929, and 362.60 ft above Erie (Barge) Canal Datum. Prior to Dec. 31, 1908, nonrecording gage at site 1.6 mi downstream at different datum.
COOPERATION.--New York State Canal Corporation.
REMARKS.--Records from November 1898 to December 1908 determined on basis of head on dam, flow through 10 mills nearby, lockages at Oswego Canal lock, estimated leakage of dam, wheel gates, flumes, and penstocks; not adjusted for inflow from Lake Erie through Erie (Barge) Canal. Records from November 1949 to September 1996, computed by using fall as determined by auxiliary water-stage recorder. Records from October 1996 to September 2014, computed by using standard stage-discharge methods. Low and medium flows from November 1949 to September 2014, affected by large diurnal fluctuations caused by powerplants upstream from station at site then in use. Published record, November 1949 to September 2014, represents the total flow at Baldwinsville and includes flow in Erie (Barge) Canal. Low and medium flows at present site can be affected by operation of powerplants and Lock 24 on Erie (Barge) Canal 1.6 mi downstream from gage. Seneca River basin receives water from Erie (Barge) Canal through Lock 32 near Pittsford. A large amount of natural storage and some artificial regulation is afforded by many large lakes and the Erie (Barge) Canal system in the river basin. From 1931-98, a large part of flow from 45.5 mi² of Mud Creek drainage area (Susquehanna River basin) had been diverted into Keuka Lake (Oswego River basin) for power generation.
Water Years 2014-18: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum daily discharge, 18,100 ft³/s, Apr. 27, 1993; minimum daily discharge, 34 ft³/s, Sept. 17, 1985, result of extreme regulation. Maximum and minimum instantaneous discharges not determined.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum daily discharge, 22,100 ft³/s, Mar. 25, 1936, provided by New York State Department of Transportation.

Peak Flow and Stage Information

Gage PhotoStation image


This station managed by the NY Water Science Center Ithaca.

Available Parameters Available Period
2014-10-25  2019-12-13
2014-08-29  2019-12-13
2019-08-15  2019-12-13


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Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 5510 12-13-2019   06:15 EST
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Dec 13 based on 70 water years of record more
Median Mean Most Recent
Value Dec 13
724 2810 4360 4560 5510 6010 11100

Gage height, feet

Most recent instantaneous value: 3.94 12-13-2019   06:15 EST
Graph of  Gage height, feet

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