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Allagash River above Allagash

Highest listed crest 19.78 ftFlood stage 15.0 ft29 crests since 1933

The Allagash River above Allagash crested at major flood stage 2 times among the 29 crests the National Weather Service lists from 1933 to 2025. The highest, 19.78 ft on April 10, 1991, was major flooding, 4.78 feet above flood stage.

The gauge

Highest listed crest
19.78 ft
April 10, 1991
Flood stage
15.0 ft
Major flooding from 19.0 ft
Crests at major
2
12th of 55 gauges in Maine
Most recent flood crest
April 10, 1991
19.78 ft, major flooding
Location
Aroostook County
Maine

Flood stages

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

Flood categories, Allagash River above Allagash
Action stage13.07Apr 30, 2008The level at which the NWS or its partners begin to take action
Flood stage (minor)15.00—Minimal or no property damage, but possibly some public threat
Moderate flood stage17.01Apr 6, 1988Some inundation of structures and roads near the stream
Major flood stage19.02Apr 10, 1991Extensive inundation of structures and roads

Every listed crest

29 crests from 1933 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Allagash River above Allagash, 1933 to 2025 5101520ft Flood stage 15.0 ftMajor 19.0 ft Apr 22, 1933: 14.22 ft, action stageMay 1, 1939: 13.14 ft, action stage; 13,500 cubic feet per secondMar 31, 1953: 12.28 ft, below flood stageApr 23, 1960: 14.16 ft, action stageMay 17, 1961: 12.21 ft, below flood stage; 28,800 cubic feet per secondApr 26, 1970: 13.83 ft, action stageApr 29, 1973: 12.33 ft, below flood stage; 29,400 cubic feet per secondApr 3, 1975: 14.43 ft, action stage; 14,700 cubic feet per secondApr 25, 1978: 12.63 ft, below flood stageApr 5, 1981: 12.76 ft, below flood stageApr 18, 1983: 19.48 ft, major flooding; 36,900 cubic feet per secondApr 17, 1984: 12.37 ft, below flood stageApr 6, 1988: 17.55 ft, moderate floodingApr 10, 1991: 19.78 ft, major floodingApr 16, 1994: 12.98 ft, below flood stageApr 24, 2007: 13.18 ft, action stageApr 30, 2008: 14.89 ft, action stage; 40,900 cubic feet per secondApr 5, 2010: 10.22 ft, below flood stage; 19,400 cubic feet per secondMay 5, 2011: 11.10 ft, below flood stage; 23,000 cubic feet per secondApr 29, 2017: 10.03 ft, below flood stage; 18,700 cubic feet per secondApr 28, 2018: 11.84 ft, below flood stage; 26,100 cubic feet per secondApr 23, 2019: 11.91 ft, below flood stage; 26,400 cubic feet per secondMay 3, 2020: 8.77 ft, below flood stage; 14,200 cubic feet per secondApr 11, 2021: 7.63 ft, below flood stage; 11,100 cubic feet per secondApr 17, 2022: 9.28 ft, below flood stage; 16,400 cubic feet per secondApr 19, 2023: 10.11 ft, below flood stage; 19,300 cubic feet per secondDec 19, 2023: 8.02 ft, below flood stage; 12,200 cubic feet per secondApr 14, 2024: 8.56 ft, below flood stage; 13,900 cubic feet per secondApr 28, 2025: 8.72 ft, below flood stage; 14,400 cubic feet per second Highest, 19.78 ft, Apr 10, 1991 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Allagash River above Allagash 1930s: 0 1940s: 0 1950s: 0 1960s: 0 1970s: 0 1980s: 2 2 1990s: 1 2000s: 0 2010s: 0 2020s: 0 1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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, Allagash River above Allagash
1Apr 10, 199119.78+4.78Major—
2Apr 18, 198319.48+4.48Major36,900
3Apr 6, 198817.55+2.55Moderate—
4Apr 30, 200814.89−0.11Action40,900
5Apr 3, 197514.43−0.57Action14,700
6Apr 22, 193314.22−0.78Action—
7Apr 23, 196014.16−0.84Action—
8Apr 26, 197013.83−1.17Action—
9Apr 24, 200713.18−1.82Action—
10May 1, 193913.14−1.86Action13,500
11Apr 16, 199412.98−2.02Below flood stage—
12Apr 5, 198112.76−2.24Below flood stage—
13Apr 25, 197812.63−2.37Below flood stage—
14Apr 17, 198412.37−2.63Below flood stage—
15Apr 29, 197312.33−2.67Below flood stage29,400
16Mar 31, 195312.28−2.72Below flood stage—
17May 17, 196112.21−2.79Below flood stage28,800
18Apr 23, 201911.91−3.09Below flood stage26,400
19Apr 28, 201811.84−3.16Below flood stage26,100
20May 5, 201111.10−3.90Below flood stage23,000
21Apr 5, 201010.22−4.78Below flood stage19,400
22Apr 19, 202310.11−4.89Below flood stage19,300
23Apr 29, 201710.03−4.97Below flood stage18,700
24Apr 17, 20229.28−5.72Below flood stage16,400
25May 3, 20208.77−6.23Below flood stage14,200
26Apr 28, 20258.72−6.28Below flood stage14,400
27Apr 14, 20248.56−6.44Below flood stage13,900
28Dec 19, 20238.02−6.98Below flood stage12,200
29Apr 11, 20217.63−7.37Below flood stage11,100

Other gauges in Aroostook County

Flood gauges in Aroostook County
Masardis17.018.70 ft, Apr 9, 20090
Washburn14.021.14 ft, Apr 18, 20152
Depot Mountain13.515.62 ft, Apr 1, 19870
Fort Kent11.013.93 ft, Apr 30, 20081
Caribou9.511.38 ft, Apr 27, 20180
South Branch near Houlton8.011.04 ft, Apr 4, 20050
Houlton4.85.58 ft, Dec 14, 20100
Connors15.015.93 ft, May 1, 20080
Dickey25.037.89 ft, Apr 9, 19911
Fort Kent22.530.07 ft, Apr 30, 20084
Nine Mile Bridge15.023.00 ft, Apr 11, 19911
Presque Isle7.58.34 ft, Apr 16, 20140
Reed Plantation10.010.27 ft, Apr 16, 20140

Aroostook County: every hazard · River floods across the country · Maine

NOAA National Water Prediction Service, gauge ALLM1, 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.