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Marys River near Philomath

Highest listed crest 21.53 ftFlood stage 20.0 ft51 crests since 1943

The Marys River near Philomath crested at major flood stage 1 time among the 51 crests the National Weather Service lists from 1943 to 2025. The highest, 21.53 ft on January 19, 2012, was major flooding, 1.53 feet above flood stage.

The gauge

Highest listed crest
21.53 ft
January 19, 2012; 11,700 cubic feet per second
Flood stage
20.0 ft
Major flooding from 21.5 ft
Crests at major
1
45th of 100 gauges in Oregon
Most recent flood crest
December 19, 2025
21.01 ft, moderate flooding
Location
Benton County
Near Corvallis (4.2 mi), Albany (13.7 mi)

Flood stages

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

Flood categories, Marys River near Philomath
Action stage16.01Apr 8, 2019The level at which the NWS or its partners begin to take action
Flood stage (minor)20.043Dec 21, 2021Minimal or no property damage, but possibly some public threat
Moderate flood stage21.06Dec 19, 2025Some inundation of structures and roads near the stream
Major flood stage21.51Jan 19, 2012Extensive inundation of structures and roads

Every listed crest

51 crests from 1943 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Marys River near Philomath, 1943 to 2025 19202122ft Flood stage 20.0 ftMajor 21.5 ft Feb 6, 1943: 20.40 ft, minor floodingJun 1, 1943: 20.50 ft, minor floodingDec 5, 1946: 20.50 ft, minor floodingJun 7, 1948: 20.40 ft, minor floodingFeb 10, 1949: 20.40 ft, minor floodingFeb 19, 1949: 20.40 ft, minor floodingJun 18, 1953: 20.50 ft, minor floodingDec 21, 1955: 20.80 ft, minor floodingJun 4, 1956: 20.50 ft, minor floodingJun 9, 1959: 20.50 ft, minor floodingFeb 9, 1960: 20.40 ft, minor floodingFeb 24, 1960: 20.50 ft, minor floodingFeb 10, 1961: 20.50 ft, minor floodingJun 19, 1964: 20.40 ft, minor floodingDec 22, 1964: 20.72 ft, minor flooding; 13,600 cubic feet per secondJun 28, 1965: 20.60 ft, minor floodingMar 9, 1966: 20.50 ft, minor floodingJun 3, 1966: 20.50 ft, minor floodingJun 28, 1967: 20.30 ft, minor floodingJan 25, 1970: 20.27 ft, minor flooding; 6,600 cubic feet per secondJan 16, 1971: 20.68 ft, minor flooding; 7,330 cubic feet per secondJan 21, 1972: 20.80 ft, minor flooding; 8,900 cubic feet per secondJan 15, 1974: 20.91 ft, minor flooding; 11,100 cubic feet per secondDec 4, 1975: 20.30 ft, minor floodingDec 15, 1977: 20.61 ft, minor flooding; 7,890 cubic feet per secondJun 13, 1980: 20.50 ft, minor floodingDec 25, 1980: 20.86 ft, minor flooding; 10,500 cubic feet per secondDec 6, 1981: 20.90 ft, minor flooding; 11,000 cubic feet per secondJan 23, 1982: 20.11 ft, minor flooding; 5,660 cubic feet per secondFeb 20, 1982: 20.22 ft, minor flooding; 5,840 cubic feet per secondDec 16, 1982: 20.89 ft, minor flooding; 10,900 cubic feet per secondFeb 13, 1984: 20.40 ft, minor floodingFeb 23, 1986: 20.30 ft, minor floodingJan 14, 1995: 20.30 ft, minor floodingFeb 17, 1995: 20.50 ft, minor floodingDec 14, 1995: 20.80 ft, minor floodingFeb 7, 1996: 20.80 ft, minor floodingDec 28, 1998: 20.85 ft, minor floodingDec 30, 2005: 21.07 ft, moderate flooding; 13,000 cubic feet per secondDec 3, 2007: 21.03 ft, moderate flooding; 12,500 cubic feet per secondJan 19, 2012: 21.53 ft, major flooding; 11,700 cubic feet per secondMar 15, 2012: 20.10 ft, minor flooding; 5,120 cubic feet per secondMar 31, 2012: 20.62 ft, minor flooding; 6,000 cubic feet per secondNov 20, 2012: 20.55 ft, minor flooding; 5,840 cubic feet per secondDec 22, 2014: 20.53 ft, minor flooding; 5,800 cubic feet per secondDec 18, 2015: 21.10 ft, moderate flooding; 7,890 cubic feet per secondNov 25, 2016: 21.21 ft, moderate flooding; 6,070 cubic feet per secondApr 8, 2019: 19.36 ft, action stage; 3,750 cubic feet per secondDec 21, 2021: 20.95 ft, minor flooding; 5,807 cubic feet per secondJan 3, 2022: 21.02 ft, moderate flooding; 6,083 cubic feet per secondDec 19, 2025: 21.01 ft, moderate flooding; 6,043 cubic feet per second Highest, 21.53 ft, Jan 19, 2012 1960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Marys River near Philomath 1940s: 6 1950s: 4 1960s: 9 9 1970s: 6 1980s: 8 1990s: 5 2000s: 2 2010s: 7 2020s: 3 1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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.
  3. 1 crest measured on an earlier gauge datum is left out: 20.30 ft on Jan 1, 1938.

Highest crests

The 50 highest of 51 listed crests.

Highest listed crests, Marys River near Philomath
1Jan 19, 201221.53+1.53Major11,700
2Nov 25, 201621.21+1.21Moderate6,070
3Dec 18, 201521.10+1.10Moderate7,890
4Dec 30, 200521.07+1.07Moderate13,000
5Dec 3, 200721.03+1.03Moderate12,500
6Jan 3, 202221.02+1.02Moderate6,083
7Dec 19, 202521.01+1.01Moderate6,043
8Dec 21, 202120.95+0.95Minor5,807
9Jan 15, 197420.91+0.91Minor11,100
10Dec 6, 198120.90+0.90Minor11,000
11Dec 16, 198220.89+0.89Minor10,900
12Dec 25, 198020.86+0.86Minor10,500
13Dec 28, 199820.85+0.85Minor—
14Dec 21, 195520.80+0.80Minor—
15Jan 21, 197220.80+0.80Minor8,900
16Dec 14, 199520.80+0.80Minor—
17Feb 7, 199620.80+0.80Minor—
18Dec 22, 196420.72+0.72Minor13,600
19Jan 16, 197120.68+0.68Minor7,330
20Mar 31, 201220.62+0.62Minor6,000
21Dec 15, 197720.61+0.61Minor7,890
22Jun 28, 196520.60+0.60Minor—
23Nov 20, 201220.55+0.55Minor5,840
24Dec 22, 201420.53+0.53Minor5,800
25Jun 1, 194320.50+0.50Minor—
26Dec 5, 194620.50+0.50Minor—
27Jun 18, 195320.50+0.50Minor—
28Jun 4, 195620.50+0.50Minor—
29Jun 9, 195920.50+0.50Minor—
30Feb 24, 196020.50+0.50Minor—
31Feb 10, 196120.50+0.50Minor—
32Mar 9, 196620.50+0.50Minor—
33Jun 3, 196620.50+0.50Minor—
34Jun 13, 198020.50+0.50Minor—
35Feb 17, 199520.50+0.50Minor—
36Feb 6, 194320.40+0.40Minor—
37Jun 7, 194820.40+0.40Minor—
38Feb 10, 194920.40+0.40Minor—
39Feb 19, 194920.40+0.40Minor—
40Feb 9, 196020.40+0.40Minor—
41Jun 19, 196420.40+0.40Minor—
42Feb 13, 198420.40+0.40Minor—
43Jun 28, 196720.30+0.30Minor—
44Dec 4, 197520.30+0.30Minor—
45Feb 23, 198620.30+0.30Minor—
46Jan 14, 199520.30+0.30Minor—
47Jan 25, 197020.27+0.27Minor6,600
48Feb 20, 198220.22+0.22Minor5,840
49Jan 23, 198220.11+0.11Minor5,660
50Mar 15, 201220.10+0.10Minor5,120

Other gauges in Benton County

Flood gauges in Benton County
Monroe9.010.42 ft, Jan 15, 19740
Corvallis30.042.40 ft, Dec 1, 18616

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

NOAA National Water Prediction Service, gauge PHIO3, 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.