Monongahela River at Maxwell Lock and Dam (lower pool)
Critical Stages
23.5' - Action
32' - Flood
34' - Moderate
36' - Major
Latest Observation
Updated: 11:30 AM EST 12/11/25
Status: No Flooding
Stage: 9.78 ft
Flow: 1.97 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 7 PM 12/11 | 10 | 5.07 |
| 1 AM 12/12 | 10 | 5.07 |
| 7 AM 12/12 | 10 | 5.07 |
| 1 PM 12/12 | 10 | 5.07 |
| 7 PM 12/12 | 10 | 5.07 |
| 1 AM 12/13 | 10 | 5.07 |
| 7 AM 12/13 | 9.9 | 3.97 |
| 1 PM 12/13 | 9.9 | 3.97 |
| 7 PM 12/13 | 9.9 | 3.97 |
| 1 AM 12/14 | 9.8 | 2.45 |
| 7 AM 12/14 | 9.8 | 2.45 |
| 1 PM 12/14 | 9.9 | 3.97 |
| 7 PM 12/14 | 9.9 | 3.97 |
| 1 AM 12/15 | 9.8 | 2.45 |
| 7 AM 12/15 | 9.8 | 2.45 |
| 1 PM 12/15 | 9.9 | 3.97 |
| 7 PM 12/15 | 9.9 | 3.97 |
| 1 AM 12/16 | 9.8 | 2.45 |
| 7 AM 12/16 | 9.8 | 2.45 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 12:30 PM 12/11 | 9.77 | 1.76 |
| 12:15 PM 12/11 | 9.79 | 2.19 |
| 12:00 PM 12/11 | 9.78 | 1.97 |
| 11:45 AM 12/11 | 9.79 | 2.19 |
| 11:30 AM 12/11 | 9.78 | 1.97 |
| 11:15 AM 12/11 | 9.74 | 1.27 |
| 11:00 AM 12/11 | 9.74 | 1.27 |
| 10:45 AM 12/11 | 9.74 | 1.27 |
| 10:30 AM 12/11 | 9.75 | 1.42 |
| 10:15 AM 12/11 | 9.74 | 1.27 |
| 10:00 AM 12/11 | 9.74 | 1.27 |
| 9:45 AM 12/11 | 9.76 | 1.58 |
| 9:30 AM 12/11 | 9.81 | 2.73 |
| 9:15 AM 12/11 | 9.79 | 2.19 |
| 9:00 AM 12/11 | 9.69 | 0.858 |
| 8:45 AM 12/11 | 9.7 | 0.921 |
| 8:30 AM 12/11 | 9.71 | 0.988 |
| 8:15 AM 12/11 | 9.72 | 1.06 |
| 8:00 AM 12/11 | 9.75 | 1.42 |
| 7:45 AM 12/11 | 9.77 | 1.76 |
| 7:30 AM 12/11 | 9.77 | 1.76 |
| 7:15 AM 12/11 | 9.71 | 0.988 |
| 7:00 AM 12/11 | 9.77 | 1.76 |
| 6:45 AM 12/11 | 9.71 | 0.988 |
| 6:30 AM 12/11 | 9.95 | 4.47 |
| 6:15 AM 12/11 | 9.75 | 1.42 |
| 6:00 AM 12/11 | 9.77 | 1.76 |
| 5:45 AM 12/11 | 9.78 | 1.97 |
| 5:30 AM 12/11 | 9.86 | 3.63 |
| 5:15 AM 12/11 | 9.9 | 3.97 |
40.5' -
Flooding begins on the lower side of Main Street in Brownsville
35' -
Homes flood on Middle Street, Liberty Street, Water Street, Broadway Street, River Street, and Axton Street in West Brownsville.
33.5' -
Lock walls overtopped.
33.32' -
Water levels reach the flood levels of the flood of July 30, 2017.
32' -
Low lying areas of West Brownsville begin to flood.
31' -
Navigation suspended, lock out of service.
28' -
Middle Street and Liberty Street in West Brownsville are closed due to storm drain system backups, and several homes have basement flooding.
27' -
Brownsville Road at Albany Tunnel (near Assad Iron and Metal) in Fayette County is closed due to high water.
| Date | Stage (ft) |
|---|---|
| Nov 5, 1985 | 44.4 |
| Mar 7, 1967 | 38.2 |
| Mar 5, 1963 | 38 |
| Jan 20, 1996 | 37.8 |
| Feb 19, 2000 | 36.5 |
| Mar 20, 1963 | 35.4 |
| Jul 30, 2017 | 33.32 |
| Jun 24, 1972 | 32.6 |
| May 25, 1968 | 32.5 |
| Feb 10, 1994 | 32.3 |
| Nov 20, 2003 | 31.4 |
| Jan 26, 1978 | 31.3 |
| Jun 11, 1974 | 31.2 |
| Mar 5, 2015 | 30.89 |
| Feb 17, 2018 | 30.81 |
| Feb 14, 1966 | 30.1 |
| Jan 29, 1994 | 29.6 |
| Dec 9, 1978 | 29.5 |
| Aug 19, 1980 | 29.4 |
| Dec 14, 2007 | 29.4 |
Data provided by the National Weather Service.
