Total streamflow across the
Allegheny River
was last observed at
148,635
cfs, and is expected to yield approximately
294,814
acre-ft of water today; about 162%
of normal.
River levels are high.
Average streamflow for this time of year is
91,632 cfs,
with recent peaks last observed
on
2022-02-24 when daily discharge volume was observed at
398,200 cfs.
Maximum discharge along the river is currently at the
Allegheny River At Natrona
reporting a streamflow rate of 38,400 cfs.
This is also the highest stage along the Allegheny River, with a gauge stage of
13.9 ft at this location.
This river is monitored from 10 different streamgauging stations along the Allegheny River, the highest being situated at an altitude of 1,457 ft, the
Allegheny River At Port Allegany.
Last Updated | 2025-04-29 |
Discharge Volume | 294,814 ACRE-FT |
Streamflow |
148,635.0 cfs
-25934.0 cfs (-14.86%) |
Percent of Normal | 162.21% |
Maximum |
398,200.0 cfs
2022-02-24 |
Seasonal Avg | 91,632 cfs |
The Allegheny River ( AL-ə-GAY-nee) is a 325-mile (523 km) long headwater stream of the Ohio River in western Pennsylvania and New York, United States. The Allegheny River runs from its headwaters just below the middle of Pennsylvania's northern border northwesterly into New York then in a zigzag southwesterly across the border and through Western Pennsylvania to join the Monongahela River at the Forks of the Ohio on the "Point" of Point State Park in Downtown Pittsburgh, Pennsylvania. The Allegheny River is, by volume, the main headstream of both the Ohio and Mississippi Rivers. Historically, the Allegheny was considered to be the upper Ohio River by both Native Americans and European settlers.
The shallow river has been made navigable upstream from Pittsburgh to East Brady by a series of locks and dams constructed in the early 20th century. A 24-mile long portion of the upper river in Warren and McKean counties of Pennsylvania and Cattaraugus County in New York is the Allegheny Reservoir also known as Lake Kinzua, created by the erection of the Kinzua Dam in 1965 for flood control.
The name of the river comes from one of a number of Delaware Indian phrases which are homophones of the English name, with varying translations.