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Siuslaw River near Mapleton

Highest listed crest 30.21 ftFlood stage 18.0 ft53 crests since 1964

The Siuslaw River near Mapleton crested at major flood stage 5 times among the 53 crests the National Weather Service lists from 1964 to 2025. The highest, 30.21 ft on February 7, 1996, was major flooding, 12.21 feet above flood stage.

The gauge

Highest listed crest
30.21 ft
February 7, 1996; 54,800 cubic feet per second
Flood stage
18.0 ft
Major flooding from 28.0 ft
Crests at major
5
17th of 100 gauges in Oregon
Most recent flood crest
December 19, 2025
21.60 ft, minor flooding
Location
Lane County
Oregon

Flood stages

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

Flood categories, Siuslaw River near Mapleton
Action stage15.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)18.032Dec 19, 2025Minimal or no property damage, but possibly some public threat
Moderate flood stage22.016Dec 18, 2015Some inundation of structures and roads near the stream
Major flood stage28.05Jan 19, 2012Extensive inundation of structures and roads

Every listed crest

53 crests from 1964 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Siuslaw River near Mapleton, 1964 to 2025 1520253035ft Flood stage 18.0 ftMajor 28.0 ft Dec 16, 1964: 28.00 ft, major flooding; 54,000 cubic feet per secondDec 4, 1968: 22.63 ft, moderate flooding; 31,600 cubic feet per secondDec 10, 1968: 19.04 ft, minor flooding; 23,600 cubic feet per secondJan 23, 1970: 19.94 ft, minor flooding; 25,600 cubic feet per secondJan 27, 1970: 22.93 ft, moderate flooding; 32,300 cubic feet per secondJan 17, 1971: 22.63 ft, moderate flooding; 31,600 cubic feet per secondNov 26, 1971: 18.78 ft, minor flooding; 23,600 cubic feet per secondJan 21, 1972: 28.45 ft, major flooding; 49,400 cubic feet per secondMar 2, 1972: 20.19 ft, minor flooding; 27,000 cubic feet per secondNov 15, 1973: 21.77 ft, minor flooding; 30,700 cubic feet per secondDec 21, 1973: 21.32 ft, minor floodingJan 16, 1974: 28.28 ft, major flooding; 48,900 cubic feet per secondDec 4, 1975: 21.20 ft, minor floodingJan 8, 1976: 23.58 ft, moderate floodingJan 6, 1977: 18.37 ft, minor flooding; 22,700 cubic feet per secondNov 25, 1977: 21.67 ft, minor flooding; 30,500 cubic feet per secondDec 13, 1977: 23.99 ft, moderate flooding; 36,400 cubic feet per secondJan 6, 1978: 22.70 ft, moderate floodingDec 2, 1980: 21.13 ft, minor flooding; 29,200 cubic feet per secondDec 25, 1980: 25.73 ft, moderate flooding; 41,400 cubic feet per secondDec 6, 1981: 23.67 ft, moderate flooding; 35,800 cubic feet per secondJan 23, 1982: 21.08 ft, minor flooding; 29,100 cubic feet per secondDec 16, 1982: 22.75 ft, moderate flooding; 33,300 cubic feet per secondFeb 18, 1983: 18.60 ft, minor flooding; 23,100 cubic feet per secondFeb 13, 1984: 22.35 ft, moderate floodingFeb 23, 1986: 23.01 ft, moderate flooding; 34,000 cubic feet per secondDec 10, 1987: 20.19 ft, minor flooding; 26,900 cubic feet per secondJan 10, 1988: 18.91 ft, minor flooding; 23,900 cubic feet per secondJan 15, 1988: 18.86 ft, minor flooding; 23,700 cubic feet per secondJan 7, 1990: 18.49 ft, minor flooding; 23,100 cubic feet per secondJan 14, 1995: 21.60 ft, minor floodingFeb 7, 1996: 30.21 ft, major flooding; 54,800 cubic feet per secondDec 2, 1998: 20.64 ft, minor floodingDec 28, 1998: 25.79 ft, moderate floodingNov 26, 1999: 21.87 ft, minor floodingDec 31, 2002: 20.12 ft, minor flooding; 26,900 cubic feet per secondDec 13, 2003: 18.35 ft, minor flooding; 22,800 cubic feet per secondDec 30, 2005: 23.98 ft, moderate flooding; 36,700 cubic feet per secondJan 11, 2006: 22.69 ft, moderate flooding; 33,302 cubic feet per secondJan 18, 2006: 20.48 ft, minor flooding; 27,822 cubic feet per secondNov 7, 2006: 18.75 ft, minor flooding; 23,800 cubic feet per secondDec 4, 2007: 21.48 ft, minor flooding; 30,300 cubic feet per secondDec 28, 2008: 18.42 ft, minor flooding; 23,100 cubic feet per secondJan 19, 2012: 28.07 ft, major flooding; 48,300 cubic feet per secondMar 30, 2012: 20.39 ft, minor flooding; 27,600 cubic feet per secondNov 19, 2012: 18.27 ft, minor flooding; 22,800 cubic feet per secondFeb 12, 2014: 18.02 ft, minor flooding; 22,200 cubic feet per secondDec 21, 2014: 22.80 ft, moderate flooding; 33,600 cubic feet per secondDec 7, 2015: 18.36 ft, minor flooding; 23,000 cubic feet per secondDec 18, 2015: 22.36 ft, moderate flooding; 32,500 cubic feet per secondApr 8, 2019: 19.73 ft, minor flooding; 26,060 cubic feet per secondMar 16, 2025: 18.87 ft, minor flooding; 24,069 cubic feet per secondDec 19, 2025: 21.60 ft, minor flooding; 30,557 cubic feet per second Highest, 30.21 ft, Feb 7, 1996 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Siuslaw River near Mapleton 1960s: 3 1970s: 15 15 1980s: 11 1990s: 6 2000s: 8 2010s: 8 2020s: 2 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

The 50 highest of 53 listed crests.

Highest listed crests, Siuslaw River near Mapleton
1Feb 7, 199630.21+12.21Major54,800
2Jan 21, 197228.45+10.45Major49,400
3Jan 16, 197428.28+10.28Major48,900
4Jan 19, 201228.07+10.07Major48,300
5Dec 16, 196428.00+10.00Major54,000
6Dec 28, 199825.79+7.79Moderate—
7Dec 25, 198025.73+7.73Moderate41,400
8Dec 13, 197723.99+5.99Moderate36,400
9Dec 30, 200523.98+5.98Moderate36,700
10Dec 6, 198123.67+5.67Moderate35,800
11Jan 8, 197623.58+5.58Moderate—
12Feb 23, 198623.01+5.01Moderate34,000
13Jan 27, 197022.93+4.93Moderate32,300
14Dec 21, 201422.80+4.80Moderate33,600
15Dec 16, 198222.75+4.75Moderate33,300
16Jan 6, 197822.70+4.70Moderate—
17Jan 11, 200622.69+4.69Moderate33,302
18Dec 4, 196822.63+4.63Moderate31,600
19Jan 17, 197122.63+4.63Moderate31,600
20Dec 18, 201522.36+4.36Moderate32,500
21Feb 13, 198422.35+4.35Moderate—
22Nov 26, 199921.87+3.87Minor—
23Nov 15, 197321.77+3.77Minor30,700
24Nov 25, 197721.67+3.67Minor30,500
25Jan 14, 199521.60+3.60Minor—
26Dec 19, 202521.60+3.60Minor30,557
27Dec 4, 200721.48+3.48Minor30,300
28Dec 21, 197321.32+3.32Minor—
29Dec 4, 197521.20+3.20Minor—
30Dec 2, 198021.13+3.13Minor29,200
31Jan 23, 198221.08+3.08Minor29,100
32Dec 2, 199820.64+2.64Minor—
33Jan 18, 200620.48+2.48Minor27,822
34Mar 30, 201220.39+2.39Minor27,600
35Mar 2, 197220.19+2.19Minor27,000
36Dec 10, 198720.19+2.19Minor26,900
37Dec 31, 200220.12+2.12Minor26,900
38Jan 23, 197019.94+1.94Minor25,600
39Apr 8, 201919.73+1.73Minor26,060
40Dec 10, 196819.04+1.04Minor23,600
41Jan 10, 198818.91+0.91Minor23,900
42Mar 16, 202518.87+0.87Minor24,069
43Jan 15, 198818.86+0.86Minor23,700
44Nov 26, 197118.78+0.78Minor23,600
45Nov 7, 200618.75+0.75Minor23,800
46Feb 18, 198318.60+0.60Minor23,100
47Jan 7, 199018.49+0.49Minor23,100
48Dec 28, 200818.42+0.42Minor23,100
49Jan 6, 197718.37+0.37Minor22,700
50Dec 7, 201518.36+0.36Minor23,000

Other gauges in Lane County

Flood gauges in Lane County
Coast Fork Willamette River at Goshen13.019.50 ft, Nov 22, 19092
Vida11.017.20 ft, Jan 1, 19231
Walterville14.016.18 ft, Feb 7, 19961
Jasper10.016.60 ft, Jan 18, 19531
Springfield15.024.30 ft, Nov 1, 19600
Eugene23.024.80 ft, Feb 10, 19610

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

NOAA National Water Prediction Service, gauge MPLO3, 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.