Thief Valley Reservoir, OR

As of 2026-09-30, Thief Valley Reservoir sits at 3096.44 ft, which is low for this time of year. Over the past 30 days the level has held steady 0.00 ft.

The most recent reading at Thief Valley Reservoir is 3096.44 ft (2026-09-30), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Thief Valley Reservoir 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 years of readings.

Compared with every September in our records, the current level is higher than 2% of them, which we classify as 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.

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 held steady 0.00 ft over the past 30 days. For the operational reason on any given week, check the U.S. Bureau of Reclamation directly.

Thief Valley Reservoir is -10.42 ft compared with this date last year (3096.44 ft today). The full-history chart above covers 4 years, with a record high of 3134.17 ft and a record low of 3096.33 ft.