Thief Valley Reservoir Water Level
Oregon · updated daily from the U.S. Bureau of Reclamation
3096.44 ft
Thief Valley Reservoir is low for this time of year and steady (+0.00 ft in the last 7 days).
Change since yesterday: +0.00 ft
Reading as of 2026-08-14 · higher than 3% of August readings on record
Where Thief Valley Reservoir sits historically
Today's level compared with every reading in our 4.5-year record for this lake.
Since yesterday
+0.00 ft
7-day change
+0.00 ft
30-day change
-12.11 ft
1-year change
-15.58 ft
Last 30 days
Last 12 months
Full history (4.5 years)
Thief Valley Reservoir records and averages
| Current level | 3096.44 ft |
|---|---|
| Record high | 3134.17 ft (2023-05-22) |
| Record low | 3096.33 ft (2024-08-22) |
| Average of all readings | 3121.42 ft |
| Data span | 4.5 years (1,997 readings) |
Frequently asked questions
Is Thief Valley Reservoir full right now?
As of 2026-08-14, Thief Valley Reservoir sits at 3096.44 ft, which is low for this time of year.Over the past 30 days the level has fallen 12.11 ft.
What is the water level at Thief Valley Reservoir today?
The most recent reading is 3096.44 ft (2026-08-14), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Thief Valley Reservoir has ever been?
The highest level in our records is 3134.17 ft on 2023-05-22. The lowest is 3096.33 ft on 2024-08-22. Our record covers about 4.5 years of readings.
Is Thief Valley Reservoir low for this time of year?
Compared with every August in our records, the current level is higher than 3% of them — low for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.
Why is Thief Valley Reservoir changing right now?
Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Thief Valley Reservoir has fallen 12.11 ft over the past 30 days. For the operational reason on any given week, check the U.S. Bureau of Reclamation directly.
How much has Thief Valley Reservoir changed over the past year?
The level is -15.58 ft compared with this date last year (3096.44 ft today). The full-history chart above covers 4.5 years, with a record high of 3134.17 ft and a record low of 3096.33 ft.
Nearby lakes in Oregon
Source: the U.S. Bureau of Reclamation. Readings are provisional and subject to revision by the publishing agency. All Oregon lake levels.