Major Flood
36 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
33 ft
Minor Flood
30 ft
Action Stage
26 ft
What Floods at Each Level
36 ft
expect widespread flooding, with serious flooding possible between Corvallis and Albany on the west bank of the river. At this and higher stages, the Willamette River between Harrisburg and Corvallis has historically been up to 3 miles wide.
32 ft
expect flooding of low spots of Hwy 99 south of Corvallis, the Corvallis-Albany Hwy, and Hwy 34 near Corvallis.
30 ft
expect extensive flooding of low-lying agricultural land east and south of Corvallis. Flooding of low areas of Hwy 34 and numerous roads in and near Corvallis begins.
28 ft
expect flooding of some river island access roads and secondary roads east of Corvallis.
26 ft
the river is at bankfull level and may spill out of its banks at some locations between Harrisburg and Albany.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Nov 30, 1861 | 42.4 ft | — |
| Dec 28, 1945 | 38.2 ft | — |
| Jan 1, 1943 | 38.1 ft | — |
About This Gauge
USGS Site
NWS LID
CORO3
River
Willamette River
County
Benton, OR
Coordinates
44.5664°N, 123.2569°W
Get Flood Alerts for Willamette River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Willamette River at Corvallis?
The Willamette River at Corvallis gauge is maintained by USGS (site 14171600) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Willamette River at Corvallis?
The NWS-defined flood stage for Willamette River at Corvallis is 30 feet. Action stage begins at 26 feet. Moderate flooding starts at 33 feet, and major flooding at 36 feet.
How do I get alerts when Willamette River rises?
Download StormCast free on Google Play, go to River Gauges, and add Willamette River at Corvallis to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Willamette River at Corvallis gauge located?
The gauge is located in Benton County, Oregon at coordinates 44.5664°N, 123.2569°W. USGS site number: 14171600. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey