Big Sandy Reservoir Water Level
Wyoming · updated daily from the U.S. Bureau of Reclamation
6743.25 ft
Big Sandy Reservoir is current reading available and falling (-2.27 ft in the last 7 days).
Change since yesterday: -0.27 ft
Reading as of 2026-08-15
Where Big Sandy Reservoir sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
-0.27 ft
7-day change
-2.27 ft
30-day change
-7.00 ft
1-year change
— ft
Last 30 days
Last 12 months
Big Sandy Reservoir records and averages
| Current level | 6743.25 ft |
|---|---|
| Record high | 6754.55 ft (2026-06-02) |
| Record low | 6743.25 ft (2026-08-15) |
| Average of all readings | 6751.08 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Big Sandy Reservoir full right now?
As of 2026-08-15, Big Sandy Reservoir sits at 6743.25 ft, which is current reading available.Over the past 30 days the level has fallen 7.00 ft.
What is the water level at Big Sandy Reservoir today?
The most recent reading is 6743.25 ft (2026-08-15), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Big Sandy Reservoir has ever been?
The highest level in our records is 6754.55 ft on 2026-06-02. The lowest is 6743.25 ft on 2026-08-15. Our record covers about 0.3 years of readings.
Why is Big Sandy Reservoir low 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. Big Sandy Reservoir has fallen 7.00 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 Big Sandy Reservoir changed over the past year?
Year-over-year comparison is not available for this lake yet. The full-history chart above covers 0.3 years, with a record high of 6754.55 ft and a record low of 6743.25 ft.
Nearby lakes in Wyoming
Source: the U.S. Bureau of Reclamation. Readings are provisional and subject to revision by the publishing agency. All Wyoming lake levels.