Major Flood
19.5 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
18.5 ft
Minor Flood
17.5 ft
Action Stage
16 ft
What Floods at Each Level
19.5 ft
expect major and widespread flooding in the upper Tualatin Valley, with numerou road closures likely and several homes flooded or isolated due to surrounding flood waters.
18.5 ft
a few homes are threatened by floodwaters. Numerous roads are flooded and may be closed, and widespread lowland agricultural flooding occurs.
17.5 ft
several minor roads begin to flood and may be closed. Widespread lowland agricultural flooding occurs at this and higher stages.
17 ft
expect inundation of low areas, including some farmland, along the river channel.
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 |
|---|---|---|
| Dec 21, 1964 | 19.34 ft | 17,100 cfs |
| Jan 20, 1972 | 19.27 ft | 11,600 cfs |
| Feb 7, 1996 | 19.06 ft | 10,100 cfs |
About This Gauge
USGS Site
NWS LID
DLLO3
River
Tualatin River
County
Washington, OR
Coordinates
45.4747°N, 123.1250°W
Get Flood Alerts for Tualatin 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 Tualatin River near Dilley?
The Tualatin River near Dilley gauge is maintained by USGS (site 14203500) 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 Tualatin River near Dilley?
The NWS-defined flood stage for Tualatin River near Dilley is 17.5 feet. Action stage begins at 16 feet. Moderate flooding starts at 18.5 feet, and major flooding at 19.5 feet.
How do I get alerts when Tualatin River rises?
Download StormCast free on Google Play, go to River Gauges, and add Tualatin River near Dilley 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 Tualatin River near Dilley gauge located?
The gauge is located in Washington County, Oregon at coordinates 45.4747°N, 123.1250°W. USGS site number: 14203500. 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
- Gauge reading affected by reservoir operations.