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Allegheny River at Rimer Lock and Dam

Highest listed crest 21.80 ftFlood stage 19.0 ft13 crests since 1956

The Allegheny River at Rimer Lock and Dam crested above flood stage 8 times among the 13 crests the National Weather Service lists from 1956 to 2022. The highest, 21.80 ft on January 22, 1959, was moderate flooding, 2.80 feet above flood stage. 10 other gauges on the Allegheny River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
21.80 ft
January 22, 1959
Flood stage
19.0 ft
Major flooding from 23.0 ft
Crests at major
0
8 above flood stage
Most recent flood crest
March 15, 2007
19.25 ft, minor flooding
Location
Armstrong County
Pennsylvania

Flood stages

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

Flood categories, Allegheny River at Rimer Lock and Dam
Action stage14.05Feb 18, 2022The level at which the NWS or its partners begin to take action
Flood stage (minor)19.06Mar 15, 2007Minimal or no property damage, but possibly some public threat
Moderate flood stage21.02Feb 14, 1966Some inundation of structures and roads near the stream
Major flood stage23.00—Extensive inundation of structures and roads

Every listed crest

13 crests from 1956 to 2022. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Allegheny River at Rimer Lock and Dam, 1956 to 2022 1618202224ft Flood stage 19.0 ftMajor 23.0 ft Mar 9, 1956: 20.30 ft, minor floodingJan 22, 1959: 21.80 ft, moderate floodingFeb 14, 1966: 21.20 ft, moderate floodingJan 31, 1968: 19.50 ft, minor floodingJun 23, 1972: 19.80 ft, minor floodingFeb 17, 1976: 19.60 ft, minor floodingSep 9, 2004: 16.90 ft, action stage; 91,300 cubic feet per secondSep 18, 2004: 19.50 ft, minor flooding; 129,600 cubic feet per secondMar 15, 2007: 19.25 ft, minor flooding; 141,678 cubic feet per secondMar 9, 2009: 16.84 ft, action stage; 86,800 cubic feet per secondMar 2, 2018: 17.16 ft, action stage; 92,240 cubic feet per secondFeb 8, 2019: 17.76 ft, action stageFeb 18, 2022: 18.61 ft, action stage Highest, 21.80 ft, Jan 22, 1959 1960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Allegheny River at Rimer Lock and Dam 1950s: 2 2 1960s: 2 1970s: 2 1980s: 0 1990s: 0 2000s: 2 2010s: 0 2020s: 0 1950s1960s1970s1980s1990s2000s2010s2020s
  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, Allegheny River at Rimer Lock and Dam
1Jan 22, 195921.80+2.80Moderate—
2Feb 14, 196621.20+2.20Moderate—
3Mar 9, 195620.30+1.30Minor—
4Jun 23, 197219.80+0.80Minor—
5Feb 17, 197619.60+0.60Minor—
6Jan 31, 196819.50+0.50Minor—
7Sep 18, 200419.50+0.50Minor129,600
8Mar 15, 200719.25+0.25Minor141,678
9Feb 18, 202218.61−0.39Action—
10Feb 8, 201917.76−1.24Action—
11Mar 2, 201817.16−1.84Action92,240
12Sep 9, 200416.90−2.10Action91,300
13Mar 9, 200916.84−2.16Action86,800

The worst floods along the Allegheny River

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

January 22, 1959: 21.80 ft here, moderate flooding

February 14, 1966: 21.20 ft here, moderate flooding

March 9, 1956: 20.30 ft here, minor flooding

  • WarrenPA · Mar 8, 1956 · 18.30 ft · Major
  • West HickoryPA · Mar 8, 1956 · 17.20 ft · Major
  • OleanNY · Mar 8, 1956 · 19.50 ft · Moderate
  • SalamancaNY · Mar 8, 1956 · 15.11 ft · Moderate

Gauges on the Allegheny River

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

Flood gauges on the Allegheny River
EldredPA23.029.10 ft, Jun 23, 19722
OleanNY12.026.20 ft, Jun 23, 19722
SalamancaNY12.024.01 ft, Jun 23, 19721
WarrenPA14.019.40 ft, Mar 17, 18656
West HickoryPA14.017.83 ft, Jan 25, 19643
FranklinPA17.026.00 ft, Feb 27, 19173
ParkerPA20.029.60 ft, Jan 22, 19592
Rimer Lock and Dam this gaugePA19.021.80 ft, Jan 22, 19590
Mosgrove Lock and DamPA19.027.70 ft, Mar 10, 19642
Kittanning Lock and DamPA21.030.70 ft, Mar 26, 19136
Clinton Lock and DamPA21.026.40 ft, Mar 18, 19361
Freeport Lock and DamPA23.033.30 ft, Mar 18, 19361
Natrona Lock and DamPA21.032.10 ft, Mar 18, 19365
C.W. Bill Young Lock and DamPA17.031.10 ft, Mar 18, 19362
Sharpsburg Lock and DamPA21.026.90 ft, Jun 24, 19721

Other gauges in Armstrong County

Flood gauges in Armstrong County
Clinton Lock and Dam21.026.40 ft, Mar 18, 19361
Freeport Lock and Dam23.033.30 ft, Mar 18, 19361
Kittanning Lock and Dam21.030.70 ft, Mar 26, 19136
Mosgrove Lock and Dam19.027.70 ft, Mar 10, 19642
Parker20.029.60 ft, Jan 22, 19592
Idaho12.519.33 ft, Sep 18, 20040
St Charles17.023.90 ft, Jul 19, 19961

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

NOAA National Water Prediction Service, gauge RMRP1, 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.