Major Flood
36 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
34 ft
Minor Flood
32 ft
Action Stage
23.5 ft
What Floods at Each Level
40.5 ft
Flooding begins on the lower side of Main Street in Brownsville
35 ft
Homes flood on Middle Street, Liberty Street, Water Street, Broadway Street, River Street, and Axton Street in West Brownsville.
33.5 ft
Lock walls overtopped.
33.32 ft
Water levels reach the flood levels of the flood of July 30, 2017.
32 ft
Low lying areas of West Brownsville begin to flood.
31 ft
Navigation suspended, lock out of service.
28 ft
Middle Street and Liberty Street in West Brownsville are closed due to storm drain system backups, and several homes have basement flooding.
27 ft
Brownsville Road at Albany Tunnel (near Assad Iron and Metal) in Fayette County is closed due to high water.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Nov 4, 1985 | 44.4 ft | — |
| Mar 6, 1967 | 38.2 ft | — |
| Mar 4, 1963 | 38 ft | — |
About This Gauge
USGS Site
NWS LID
MAXP1
River
Monongahela River
County
Fayette, PA
Coordinates
40.0017°N, 79.9611°W
Get Flood Alerts for Monongahela River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Monongahela River at Maxwell Lock and Dam (lower pool)?
The Monongahela River at Maxwell Lock and Dam (lower pool) gauge is maintained by USGS (site 03073751) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Monongahela River at Maxwell Lock and Dam (lower pool)?
The NWS-defined flood stage for Monongahela River at Maxwell Lock and Dam (lower pool) is 32 feet. Action stage begins at 23.5 feet. Moderate flooding starts at 34 feet, and major flooding at 36 feet.
How do I get alerts when Monongahela River rises?
Download StormCast free on Google Play, go to River Gauges, and add Monongahela River at Maxwell Lock and Dam (lower pool) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Monongahela River at Maxwell Lock and Dam (lower pool) gauge located?
The gauge is located in Fayette County, Pennsylvania at coordinates 40.0017°N, 79.9611°W. USGS site number: 03073751. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Monongahela River
On This River
Upstream: Monongahela River at Grays Landing Lock and Dam
Downstream: Monongahela River at Charleroi Lock and Dam
More Resources
Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers
- The above river forecast includes future rainfall/snowmelt. Forecast stages may be different if the actual rainfall/snowmelt is different than the forecast rainfall/snowmelt.
- Stage may be affected by ice.