Total streamflow across the Oswegatchie River was last observed at 3,974 cfs, and is expected to yield approximately 7,882 acre-ft of water today; about 75% of normal. Average streamflow for this time of year is 5,293 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 3,430 cfs. This is also the highest stage along the Oswegatchie River, with a gauge stage of 3.81 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.

The Oswegatchie River is a 137-mile-long river located in Northern New York that flows from the Adirondack Mountains into the St. Lawrence River. The river was historically used for transportation and logging, and its name is derived from the Mohawk word for "black water." The river's hydrology includes rapids, waterfalls, and calm stretches, making it popular for canoeing, kayaking, and fishing. There are several reservoirs and dams along the river, including the Cranberry Lake Dam and the Stillwater Reservoir. These dams provide hydroelectric power and flood control. The river is also used for agricultural purposes, such as irrigation and livestock watering. Recreationally, the Oswegatchie River is known for its camping, hiking, and hunting opportunities in the surrounding Adirondack Park.