Monongahela River at Maxwell Lock and Dam (lower pool), PA

River level and flood forecast · Fayette County

Normal11.4 ftas of Mon 3:30 PM

The river is 20.6 ft below flood stage (32 ft).

Forecast to rise to 12.1 ft Tue 2 AM, below the 32 ft flood stage.

The last 7 days and the forecast

010203040TueThuSatMonWedFriAction 23.5 ftFlood 32 ftModerate 34 ftMajor 36 ftNowObserved (ft)NWS forecast

NWS forecast issued Mon, Oct 12, 1:58 PM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

Major flood stage36 ft
Moderate flood stage34 ft
Flood stage32 ft
Action stage23.5 ft
Record crest (November 5, 1985)44.4 ft

What floods at each level

From the National Weather Service, highest first.

  • 40.5 ftFlooding begins on the lower side of Main Street in Brownsville
  • 35 ftHomes flood on Middle Street, Liberty Street, Water Street, Broadway Street, River Street, and Axton Street in West Brownsville.
  • 33.5 ftLock walls overtopped.
  • 33.32 ftWater levels reach the flood levels of the flood of July 30, 2017.
  • 32 ftLow lying areas of West Brownsville begin to flood.
  • 31 ftNavigation suspended, lock out of service.
  • 28 ftMiddle Street and Liberty Street in West Brownsville are closed due to storm drain system backups, and several homes have basement flooding.
  • 27 ftBrownsville Road at Albany Tunnel (near Assad Iron and Metal) in Fayette County is closed due to high water.

Highest crests on record

  1. 44.4 ft — November 5, 1985
  2. 38.2 ft — March 7, 1967
  3. 38 ft — March 5, 1963
  4. 37.8 ft — January 20, 1996
  5. 36.5 ft — February 19, 2000

Recent crests: 20.68 ft (February 8, 2019) · 30.81 ft (February 17, 2018) · 33.32 ft (July 30, 2017) · 21.5 ft (March 15, 2015) · 30.89 ft (March 5, 2015)

Up and down the river, and nearby

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MAXP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.