Rivers in Pennsylvania
Allegheny River at C.W. Bill Young Lock and Dam
Below flood stage
11.20ftStage
Observed Mon, Sep 28, 7:45 AM EDT
- Flood stage
- 17.00 ft
- Forecast crest
- 11.20 ftMon, Sep 28, 8:00 AM EDT
- Record crest
- 31.10 ft1936
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 23.00 ft |
| Moderate flood | 20.00 ft |
| Minor flood | 17.00 ft |
| Action | 15.00 ft |
- 22.70 ftState Route 366 is flooded.
- 20.00 ftLock walls overtopped.
- 19.00 ftLock 3 ceases operations for navigation.
- 18.00 ftNavigation suspended, lock out of service.
- 17.70 ftBasement flooding begins in New Kensington.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 22, 2026.
Crest history
21 crests on NOAA’s list since 1936.
| # | Date | Stage |
|---|---|---|
| 1 | March 18, 1936 | 31.10 ft |
| 2 | December 30, 1942 | 23.30 ft |
| 3 | March 10, 1964 | 21.40 ft |
| 4 | January 22, 1959 | 21.10 ft |
| 5 | June 23, 1972 | 20.90 ft |
| 6 | September 18, 2004 | 19.80 ft |
| 7 | January 2, 1979 | 19.20 ft |
| 8 | January 20, 1996 | 19.10 ft |
| 9 | March 6, 1964 | 18.60 ft |
| 10 | April 9, 1987 | 18.40 ft |
| 11 | March 16, 2007 | 17.90 ft |
| 12 | February 17, 1976 | 17.80 ft |
| 13 | April 13, 2024 | 17.45 ft |
| 14 | December 31, 1990 | 17.40 ft |
| 15 | March 7, 2011 | 17.19 ft |
| 16 | February 19, 2022 | 17.07 ft |
| 17 | January 7, 2005 | 17.00 ft |
| 18 | September 10, 2004 | 17.00 ft |
| 19 | January 15, 2005 | 16.50 ft |
| 20 | February 9, 2019 | 16.20 ft |
| 21 | March 24, 2007 | 16.00 ft |
Most recent crests
- April 13, 2024: 17.45 ft
- February 19, 2022: 17.07 ft
- February 9, 2019: 16.20 ft
- March 7, 2011: 17.19 ft
- March 24, 2007: 16.00 ft
- March 16, 2007: 17.90 ft
- January 15, 2005: 16.50 ft
- January 7, 2005: 17.00 ft
- September 18, 2004: 19.80 ft
- September 10, 2004: 17.00 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Ohio River Forecast Center. Forecasts are issued routinely year-round. 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.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.