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Oswegatchie River River Levels

Last Updated: December 22, 2025

The Oswegatchie River is a 137-mile-long river located in Northern New York that flows from the Adirondack Mountains into the St.


Summary

Total streamflow across the Oswegatchie River was last observed at 1,615 cfs, and is expected to yield approximately 3,203 acre-ft of water today; about 51% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 3,190 cfs, with recent peaks last observed on 2014-04-15 when daily discharge volume was observed at 16,160 cfs.

Maximum discharge along the river is currently at the Oswegatchie River Near Heuvelton Ny reporting a streamflow rate of 1,250 cfs. This is also the highest stage along the Oswegatchie River, with a gauge stage of 4.14 ft at this location. This river is monitored from 2 different streamgauging stations along the Oswegatchie River, the highest being situated at an altitude of 1,033 ft, the Oswegatchie River Near Oswegatchie Ny.

River Details

Last Updated 2025-12-09
Discharge Volume 3,203 ACRE-FT
Streamflow 1,615.0 cfs
+55.0 cfs (+3.53%)
Percent of Normal 50.63%
Maximum 16,160.0 cfs
2014-04-15
Seasonal Avg 3,190 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Oswegatchie River Near Oswegatchie Ny
USGS 04262000
813 cfs 3.65 ft -9.47
Oswegatchie River Near Heuvelton Ny
USGS 04263000
1250 cfs 4.14 ft -3.85
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Oswegatchie River is a 137-mile-long (220 km) river in northern New York that flows from the Adirondack Mountains north to the Saint Lawrence River. The Oswegatchie River begins at Partlow Lake in Hamilton County, New York. The river continues through Cranberry Lake which was 'doubled in size' through construction of a dam in the late 1860s. The river continues from the dam to Gouverneur, to near Talcville in St. Lawrence County, where it joins the West Branch. Much of it is within Adirondack State Park. The city of Ogdensburg developed at the mouth of the river at its confluence with the St. Lawrence.