Rivers in Pennsylvania
Allegheny River at Rimer Lock and Dam
Below flood stage
10.65ftStage
Observed Wed, Sep 30, 5:00 AM EDT
- Flood stage
- 19.00 ft
- Record crest
- 21.80 ft1959
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 23.00 ft |
| Moderate flood | 21.00 ft |
| Minor flood | 19.00 ft |
| Action | 14.00 ft |
- 20.00 ftCottages across the river from the lock flood.
- 19.00 ftLock walls overtopped.
- 17.00 ftNavigation suspended, lock out of service.
- 14.00 ftWater rises onto a section of armstrong trail above rimer on east bank of river.
Flood outlook
Chance of flooding, October to December
| 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 29, 2026.
Crest history
13 crests on NOAA’s list since 1956.
| # | Date | Stage |
|---|---|---|
| 1 | January 22, 1959 | 21.80 ft |
| 2 | February 14, 1966 | 21.20 ft |
| 3 | March 9, 1956 | 20.30 ft |
| 4 | June 23, 1972 | 19.80 ft |
| 5 | February 17, 1976 | 19.60 ft |
| 6 | January 31, 1968 | 19.50 ft |
| 7 | September 18, 2004 | 19.50 ft |
| 8 | March 15, 2007 | 19.25 ft |
| 9 | February 18, 2022 | 18.61 ft |
| 10 | February 8, 2019 | 17.76 ft |
| 11 | March 2, 2018 | 17.16 ft |
| 12 | September 9, 2004 | 16.90 ft |
| 13 | March 9, 2009 | 16.84 ft |
Most recent crests
- February 18, 2022: 18.61 ft
- February 8, 2019: 17.76 ft
- March 2, 2018: 17.16 ft
- March 9, 2009: 16.84 ft
- March 15, 2007: 19.25 ft
- September 18, 2004: 19.50 ft
- September 9, 2004: 16.90 ft
- February 17, 1976: 19.60 ft
- June 23, 1972: 19.80 ft
- January 31, 1968: 19.50 ft
Nearby
Upstream, downstream and the gauges around this one.
- UpstreamAllegheny River at Parker
- DownstreamAllegheny River at Mosgrove Lock and Dam
- Red Bank Creek at St Charles
- Allegheny River at Kittanning Lock and Dam
- Mahoning Creek at Mahoning Dam Tailwater
- Mahoning Creek at Mahoning Dam Pool
- Crooked Creek at Crooked Creek Dam Tailwater
- Allegheny River at Clinton Lock and Dam
What this means
Forecasts by the Ohio River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. 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.