Monongahela River River Levels

Last Updated: December 4, 2025

The Monongahela River is a 128-mile-long river located in West Virginia and Pennsylvania.


Summary

Total streamflow across the Monongahela River was last observed at 38,600 cfs, and is expected to yield approximately 76,562 acre-ft of water today; about 125% of normal. River levels are high. Average streamflow for this time of year is 30,958 cfs, with recent peaks last observed on 2018-02-17 when daily discharge volume was observed at 219,000 cfs.

Maximum discharge along the river is currently at the Monongahela River At Elizabeth reporting a streamflow rate of 21,100 cfs. However, the streamgauge with the highest stage along the river is the Monongahela River Near Masontown with a gauge stage of 10.79 ft. This river is monitored from 2 different streamgauging stations along the Monongahela River, the highest being situated at an altitude of 765 ft, the Monongahela River Near Masontown.

River Details

Last Updated 2024-04-11
Discharge Volume 76,562 ACRE-FT
Streamflow 38,600.0 cfs
+2300.0 cfs (+6.34%)
Percent of Normal 124.69%
Maximum 219,000.0 cfs
2018-02-17
Seasonal Avg 30,958 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Monongahela River Near Masontown
USGS 03072655
4420 cfs 10.79 ft 3.51
Monongahela River At Elizabeth
USGS 03075070
21100 cfs 7.61 ft -8.26
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Monongahela River ( mə-NONG-gə-HEE-lə, -⁠HAY-) — often referred to locally as the Mon () — is a 130-mile-long (210 km) river on the Allegheny Plateau in north-central West Virginia and southwestern Pennsylvania. The river flows from the confluence of its west and east forks in north central West Virginia northeasterly into southwestern Pennsylvania, then northerly to Pittsburgh and its confluence with the Allegheny River to form the Ohio River. The river is navigable its entire length via a series of locks and dams.