Major Flood
23 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
20 ft
Minor Flood
17 ft
Action Stage
15 ft
What Floods at Each Level
22.7 ft
State Route 366 is flooded.
20 ft
Lock walls overtopped.
19 ft
Lock 3 ceases operations for navigation.
18 ft
Navigation suspended, lock out of service.
17.7 ft
Basement flooding begins in New Kensington.
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 |
|---|---|---|
| Mar 17, 1936 | 31.1 ft | — |
| Dec 29, 1942 | 23.3 ft | — |
| Mar 9, 1964 | 21.4 ft | — |
About This Gauge
USGS Site
NWS LID
ACMP1
River
Allegheny River
County
Allegheny, PA
Coordinates
40.5361°N, 79.8150°W
Get Flood Alerts for Allegheny 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 Allegheny River at C.W. Bill Young Lock and Dam?
The Allegheny River at C.W. Bill Young Lock and Dam gauge is maintained by USGS (site 03049640) 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 Allegheny River at C.W. Bill Young Lock and Dam?
The NWS-defined flood stage for Allegheny River at C.W. Bill Young Lock and Dam is 17 feet. Action stage begins at 15 feet. Moderate flooding starts at 20 feet, and major flooding at 23 feet.
How do I get alerts when Allegheny River rises?
Download StormCast free on Google Play, go to River Gauges, and add Allegheny River at C.W. Bill Young Lock and Dam 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 Allegheny River at C.W. Bill Young Lock and Dam gauge located?
The gauge is located in Allegheny County, Pennsylvania at coordinates 40.5361°N, 79.8150°W. USGS site number: 03049640. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Allegheny River
On This River
Upstream: Allegheny River at Natrona Lock and Dam
Downstream: Allegheny River at Sharpsburg Lock and Dam
More Resources
Source & Notes
Data provided by: US Army Corps of Engineers, 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.