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Monongahela River at Point Marion Lock and Dam (lower pool)

Highest listed crest 34.00 ftFlood stage 26.0 ft35 crests since 1963

The Monongahela River at Point Marion Lock and Dam (lower pool) crested at major flood stage 7 times among the 35 crests the National Weather Service lists from 1963 to 2021. The highest, 34.00 ft on January 19, 1996, was major flooding, 8.00 feet above flood stage. 5 other gauges on the Monongahela River crested above flood stage within a week of it.

The gauge

Highest listed crest
34.00 ft
January 19, 1996
Flood stage
26.0 ft
Major flooding from 28.0 ft
Crests at major
7
27th of 170 gauges in Pennsylvania
Most recent flood crest
March 1, 2021
26.90 ft, minor flooding
Location
Greene County
Near Morgantown (6.5 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Monongahela River at Point Marion Lock and Dam (lower pool)
Action stage20.015Sep 28, 2018The level at which the NWS or its partners begin to take action
Flood stage (minor)26.04Mar 1, 2021Minimal or no property damage, but possibly some public threat
Moderate flood stage27.08Feb 17, 2018Some inundation of structures and roads near the stream
Major flood stage28.07Jul 29, 2017Extensive inundation of structures and roads

Every listed crest

35 crests from 1963 to 2021. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Monongahela River at Point Marion Lock and Dam (lower pool), 1963 to 2021 1520253035ft Flood stage 26.0 ftMajor 28.0 ft Mar 5, 1963: 31.80 ft, major floodingMar 20, 1963: 30.20 ft, major floodingMar 7, 1967: 33.50 ft, major floodingMay 24, 1968: 29.70 ft, major floodingJun 23, 1972: 26.30 ft, minor floodingJan 11, 1974: 27.00 ft, moderate floodingJun 24, 1974: 27.00 ft, moderate floodingApr 26, 1975: 22.70 ft, action stageOct 10, 1976: 24.60 ft, action stageJan 26, 1978: 27.60 ft, moderate floodingDec 9, 1978: 26.20 ft, minor floodingDec 21, 1978: 22.20 ft, action stageFeb 26, 1979: 23.60 ft, action stageMar 5, 1979: 22.60 ft, action stageAug 18, 1980: 27.20 ft, moderate floodingJun 6, 1981: 27.40 ft, moderate floodingFeb 5, 1986: 22.20 ft, action stageDec 31, 1990: 23.60 ft, action stageJan 19, 1996: 34.00 ft, major floodingFeb 19, 2000: 32.30 ft, major flooding; 125,000 cubic feet per secondMar 21, 2002: 25.30 ft, action stage; 79,700 cubic feet per secondFeb 23, 2003: 23.40 ft, action stage; 69,100 cubic feet per secondNov 20, 2003: 25.60 ft, action stage; 81,300 cubic feet per secondFeb 7, 2004: 24.50 ft, action stage; 75,200 cubic feet per secondDec 14, 2007: 27.00 ft, moderate flooding; 89,224 cubic feet per secondJun 5, 2008: 23.65 ft, action stage; 70,452 cubic feet per secondMay 4, 2009: 26.19 ft, minor flooding; 84,657 cubic feet per secondJan 26, 2010: 25.10 ft, action stage; 78,553 cubic feet per secondMar 4, 2015: 27.97 ft, moderate flooding; 94,825 cubic feet per secondMar 15, 2015: 21.63 ft, action stage; 59,235 cubic feet per secondJul 29, 2017: 30.30 ft, major flooding; 110,200 cubic feet per secondFeb 17, 2018: 27.66 ft, moderate flooding; 93,030 cubic feet per secondSep 28, 2018: 22.40 ft, action stage; 63,518 cubic feet per secondFeb 8, 2019: 18.99 ft, below flood stage; 44,310 cubic feet per secondMar 1, 2021: 26.90 ft, minor flooding; 88,664 cubic feet per second Highest, 34.00 ft, Jan 19, 1996 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Monongahela River at Point Marion Lock and Dam (lower pool) 1960s: 4 1970s: 5 5 1980s: 2 1990s: 1 2000s: 3 2010s: 3 2020s: 1 1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Monongahela River at Point Marion Lock and Dam (lower pool)
1Jan 19, 199634.00+8.00Major—
2Mar 7, 196733.50+7.50Major—
3Feb 19, 200032.30+6.30Major125,000
4Mar 5, 196331.80+5.80Major—
5Jul 29, 201730.30+4.30Major110,200
6Mar 20, 196330.20+4.20Major—
7May 24, 196829.70+3.70Major—
8Mar 4, 201527.97+1.97Moderate94,825
9Feb 17, 201827.66+1.66Moderate93,030
10Jan 26, 197827.60+1.60Moderate—
11Jun 6, 198127.40+1.40Moderate—
12Aug 18, 198027.20+1.20Moderate—
13Jan 11, 197427.00+1.00Moderate—
14Jun 24, 197427.00+1.00Moderate—
15Dec 14, 200727.00+1.00Moderate89,224
16Mar 1, 202126.90+0.90Minor88,664
17Jun 23, 197226.30+0.30Minor—
18Dec 9, 197826.20+0.20Minor—
19May 4, 200926.19+0.19Minor84,657
20Nov 20, 200325.60−0.40Action81,300
21Mar 21, 200225.30−0.70Action79,700
22Jan 26, 201025.10−0.90Action78,553
23Oct 10, 197624.60−1.40Action—
24Feb 7, 200424.50−1.50Action75,200
25Jun 5, 200823.65−2.35Action70,452
26Feb 26, 197923.60−2.40Action—
27Dec 31, 199023.60−2.40Action—
28Feb 23, 200323.40−2.60Action69,100
29Apr 26, 197522.70−3.30Action—
30Mar 5, 197922.60−3.40Action—
31Sep 28, 201822.40−3.60Action63,518
32Dec 21, 197822.20−3.80Action—
33Feb 5, 198622.20−3.80Action—
34Mar 15, 201521.63−4.37Action59,235
35Feb 8, 201918.99−7.01Below flood stage44,310

The worst floods along the Monongahela River

For this gauge's highest crests, the other gauges on the Monongahela River that crested above flood stage within a week.

January 19, 1996: 34.00 ft here, major flooding

March 7, 1967: 33.50 ft here, major flooding

February 19, 2000: 32.30 ft here, major flooding

Gauges on the Monongahela River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Monongahela River
Morgantown Lock and DamWV22.027.70 ft, Nov 6, 19851
Point Marion Lock and Dam (lower pool) this gaugePA26.034.00 ft, Jan 19, 19967
Grays Landing Lock and DamPA21.036.00 ft, Jul 1, 18883
Maxwell Lock and Dam (lower pool)PA32.044.40 ft, Nov 5, 19855
Charleroi Lock and DamPA28.042.70 ft, Nov 5, 198514
Elizabeth Lock and DamPA20.032.50 ft, Mar 18, 19369
Braddock Lock and DamPA22.035.30 ft, Mar 18, 19368

Other gauges in Greene County

Flood gauges in Greene County
Shannopin12.014.27 ft, Aug 18, 19800
Grays Landing Lock and Dam21.036.00 ft, Jul 1, 18883
Jefferson17.018.96 ft, Sep 10, 20180

Greene County: every hazard · River floods across the country · Pennsylvania

NOAA National Water Prediction Service, gauge PMRP1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.