Lake levels
Big Sandy Reservoir, WY
- water level
- 6735.62 ft
- Condition
- About average for this time of year
- 7-day change
- +0.77 ft
- 30-day change
- +2.17 ft
- 1-year change
- -8.70 ft
Reading as of 2026-10-12 | the U.S. Bureau of Reclamation
- Since yesterday
- +0.18 ft
- 7-day change
- +0.77 ft
- 30-day change
- +2.17 ft
- 1-year change
- -8.70 ft
- Record high
- 6763.33 ft
In brief
Big Sandy Reservoir stood at 6,735.62 feet on Oct 12, 2026. That is lower than 56% of October readings since 2021.
Source: U.S. Bureau of Reclamation
Lake level timeline
Records and averages
| Current level | 6735.62 ft |
|---|---|
| Record high | 6763.33 ft (2024-06-10) |
| Record low | 6720.44 ft (2021-08-18) |
| Average of all readings | 6747.61 ft |
| Data span | 5 years (2,000 readings) |
Level schematic
Frequently asked questions
Is Big Sandy Reservoir full right now?
As of 2026-10-12, Big Sandy Reservoir sits at 6735.62 ft, which is about average for this time of year. Over the past 30 days the level has risen 2.17 ft.
What is the water level at Big Sandy Reservoir today?
The most recent reading at Big Sandy Reservoir is 6735.62 ft (2026-10-12), 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 for Big Sandy Reservoir in our records is 6763.33 ft on 2024-06-10. The lowest is 6720.44 ft on 2021-08-18. Our record covers about 5 years of readings.
Is Big Sandy Reservoir low for this time of year?
Compared with every October in our records, the current level is higher than 44% of them, which we classify as about average 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 Big Sandy 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. Big Sandy Reservoir has risen 2.17 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?
Big Sandy Reservoir is -8.70 ft compared with this date last year (6735.62 ft today). The full-history chart above covers 5 years, with a record high of 6763.33 ft and a record low of 6720.44 ft.
Download and cite
Quote this reading
Big Sandy Reservoir stood at 6,735.62 feet on Oct 12, 2026. That is lower than 56% of October readings since 2021.
Download the full record
big-sandy-reservoir-wy-water-level-history.csv
How to cite
MyWaterLevel, “Big Sandy Reservoir water level, 2021 to 2026,” data from U.S. Bureau of Reclamation, https://mywaterlevel.com/lake/wy/big-sandy-reservoir/, accessed Oct 13, 2026.
Source: the U.S. Bureau of Reclamation. All Wyoming lake levels. Readings are provisional and may be revised. About our data and methods.