Total streamflow across the
Tualatin River
was last observed at
7,250
cfs, and is expected to yield approximately
14,380
acre-ft of water today; about 168%
of normal.
River levels are high.
Average streamflow for this time of year is
4,319 cfs,
with recent peaks last observed
on
2015-12-12 when daily discharge volume was observed at
15,370 cfs.
Maximum discharge along the river is currently at the
Tualatin River At West Linn
reporting a streamflow rate of 6,120 cfs.
However, the streamgauge with the highest stage along the river is the
Tualatin River Near Dilley
with a gauge stage of 16.47 ft.
This river is monitored from 2 different streamgauging stations along the Tualatin River, the highest being situated at an altitude of 168 ft, the
Tualatin River Near Dilley.
| Last Updated | 2025-12-23 |
| Discharge Volume | 14,380 ACRE-FT |
| Streamflow |
7,250.0 cfs
+160.0 cfs (+2.26%) |
| Percent of Normal | 167.87% |
| Maximum |
15,370.0 cfs
2015-12-12 |
| Seasonal Avg | 4,319 cfs |
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Tualatin River Near Dilley
USGS 14203500 |
1130 cfs | 16.47 ft | -10.32 | |||||
|
Tualatin River At West Linn
USGS 14207500 |
6120 cfs | 9.44 ft | 4.97 |
The Tualatin River is a tributary of the Willamette River in Oregon in the United States. The river is about 83 miles (134 km) long, and it drains a fertile farming region called the Tualatin Valley southwest and west of Portland at the northwest corner of the Willamette Valley. There are approximately 500,000 people residing on 15 percent of the land in the river's watershed.