RIVER GAUGE · TUALATIN RIVER
Tualatin River near Dilley
Washington County, Oregon
Water level11.37 ft
Flow198 cfs
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action16 ft910 cfs
Minor flood17.5 ft2,500 cfs
Moderate flood18.5 ft6,200 cfs
Major flood19.5 ft14,500 cfs
The past week
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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.
Highest crests on record
| Date | Level | 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 |
More on Tualatin River
UpstreamTualatin River near Gaston ↗
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