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Alsea River near Tidewater

Highest listed crest 29.50 ftFlood stage 18.0 ft33 crests since 1890

The Alsea River near Tidewater crested at major flood stage 12 times among the 33 crests the National Weather Service lists from 1890 to 2025. The highest, 29.50 ft on February 3, 1890, was major flooding, 11.50 feet above flood stage.

The gauge

Highest listed crest
29.50 ft
February 3, 1890
Flood stage
18.0 ft
Major flooding from 23.0 ft
Crests at major
12
1st of 100 gauges in Oregon
Most recent flood crest
December 19, 2025
21.27 ft, moderate flooding
Location
Lincoln County
Oregon

Flood stages

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

Flood categories, Alsea River near Tidewater
Action stage16.01Jan 7, 1990The level at which the NWS or its partners begin to take action
Flood stage (minor)18.012Dec 18, 2015Minimal or no property damage, but possibly some public threat
Moderate flood stage21.08Dec 19, 2025Some inundation of structures and roads near the stream
Major flood stage23.012Jan 19, 2012Extensive inundation of structures and roads

Every listed crest

33 crests from 1890 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Alsea River near Tidewater, 1890 to 2025 15202530ft Flood stage 18.0 ftMajor 23.0 ft Feb 3, 1890: 29.50 ft, major floodingFeb 1, 1916: 20.80 ft, minor flooding; 30,000 cubic feet per secondDec 15, 1946: 21.70 ft, moderate flooding; 26,400 cubic feet per secondJan 7, 1948: 22.43 ft, moderate flooding; 27,800 cubic feet per secondDec 21, 1955: 23.80 ft, major flooding; 32,200 cubic feet per secondNov 4, 1960: 24.02 ft, major flooding; 32,800 cubic feet per secondJan 20, 1964: 22.12 ft, moderate flooding; 28,200 cubic feet per secondDec 22, 1964: 27.44 ft, major flooding; 41,800 cubic feet per secondJan 28, 1965: 23.26 ft, major flooding; 25,500 cubic feet per secondJan 17, 1971: 18.88 ft, minor flooding; 21,000 cubic feet per secondJan 21, 1972: 25.71 ft, major flooding; 37,000 cubic feet per secondNov 15, 1973: 23.10 ft, major flooding; 30,400 cubic feet per secondJan 16, 1974: 24.55 ft, major flooding; 34,100 cubic feet per secondDec 13, 1977: 20.60 ft, minor flooding; 24,700 cubic feet per secondDec 26, 1980: 23.92 ft, major flooding; 32,500 cubic feet per secondDec 6, 1981: 20.01 ft, minor flooding; 23,400 cubic feet per secondFeb 20, 1982: 18.31 ft, minor flooding; 19,700 cubic feet per secondDec 16, 1982: 22.23 ft, moderate flooding; 28,200 cubic feet per secondFeb 1, 1987: 18.56 ft, minor flooding; 20,200 cubic feet per secondJan 15, 1988: 18.08 ft, minor flooding; 19,300 cubic feet per secondJan 7, 1990: 17.31 ft, action stage; 17,800 cubic feet per secondFeb 7, 1996: 23.88 ft, major flooding; 32,100 cubic feet per secondNov 20, 1996: 22.28 ft, moderate flooding; 28,200 cubic feet per secondJan 1, 1997: 18.21 ft, minor flooding; 19,500 cubic feet per secondDec 28, 1998: 24.04 ft, major flooding; 32,500 cubic feet per secondNov 26, 1999: 20.04 ft, minor flooding; 23,200 cubic feet per secondDec 30, 2005: 21.78 ft, moderate flooding; 27,400 cubic feet per secondDec 3, 2007: 21.85 ft, moderate flooding; 27,600 cubic feet per secondJan 19, 2012: 23.61 ft, major flooding; 32,000 cubic feet per secondNov 19, 2012: 18.88 ft, minor flooding; 21,800 cubic feet per secondDec 21, 2014: 18.89 ft, minor flooding; 21,800 cubic feet per secondDec 18, 2015: 19.40 ft, minor flooding; 22,900 cubic feet per secondDec 19, 2025: 21.27 ft, moderate flooding; 26,835 cubic feet per second Highest, 29.50 ft, Feb 3, 1890 1900192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Alsea River near Tidewater 1890s: 1 1900s: 0 1910s: 1 1920s: 0 1930s: 0 1940s: 2 1950s: 1 1960s: 4 1970s: 5 1980s: 6 6 1990s: 5 2000s: 2 2010s: 4 2020s: 1 1890s1900s1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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, Alsea River near Tidewater
1Feb 3, 189029.50+11.50Major—
2Dec 22, 196427.44+9.44Major41,800
3Jan 21, 197225.71+7.71Major37,000
4Jan 16, 197424.55+6.55Major34,100
5Dec 28, 199824.04+6.04Major32,500
6Nov 4, 196024.02+6.02Major32,800
7Dec 26, 198023.92+5.92Major32,500
8Feb 7, 199623.88+5.88Major32,100
9Dec 21, 195523.80+5.80Major32,200
10Jan 19, 201223.61+5.61Major32,000
11Jan 28, 196523.26+5.26Major25,500
12Nov 15, 197323.10+5.10Major30,400
13Jan 7, 194822.43+4.43Moderate27,800
14Nov 20, 199622.28+4.28Moderate28,200
15Dec 16, 198222.23+4.23Moderate28,200
16Jan 20, 196422.12+4.12Moderate28,200
17Dec 3, 200721.85+3.85Moderate27,600
18Dec 30, 200521.78+3.78Moderate27,400
19Dec 15, 194621.70+3.70Moderate26,400
20Dec 19, 202521.27+3.27Moderate26,835
21Feb 1, 191620.80+2.80Minor30,000
22Dec 13, 197720.60+2.60Minor24,700
23Nov 26, 199920.04+2.04Minor23,200
24Dec 6, 198120.01+2.01Minor23,400
25Dec 18, 201519.40+1.40Minor22,900
26Dec 21, 201418.89+0.89Minor21,800
27Jan 17, 197118.88+0.88Minor21,000
28Nov 19, 201218.88+0.88Minor21,800
29Feb 1, 198718.56+0.56Minor20,200
30Feb 20, 198218.31+0.31Minor19,700
31Jan 1, 199718.21+0.21Minor19,500
32Jan 15, 198818.08+0.08Minor19,300
33Jan 7, 199017.31−0.69Action17,800

Other gauges in Lincoln County

Flood gauges in Lincoln County
Waldport10.010.69 ft, Dec 19, 20250
Siletz16.028.62 ft, Nov 26, 19995
Yachats14.215.65 ft, Dec 19, 20250
Chitwood12.013.30 ft, Dec 19, 20250

Lincoln County: every hazard · River floods across the country · Oregon

NOAA National Water Prediction Service, gauge TIDO3, 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.