Reservoirs
Above normalFontenelle Reservoir water level
Live reservoir storage and water level in Green-Colorado basin, Wyoming
Data through Oct 15, 2026 · source last checked Oct 17, 2026 · page revised Oct 16, 2026
Cite
- Storage
About this data
- Source
- US Bureau of Reclamation RISE; California reservoirs via CA DWR CDEC
- Series
- End-of-day reservoir storage
- Geography
- Fontenelle Reservoir water level
- Unit
- acre-feet
- Calculation
- Daily reading
- Last observation
- Oct 15, 2026
- Update frequency
- Daily
Now 274,722 af, 21% above the 5-yr median, 80% of capacity.
Fontenelle storage stands at 274,722 af, up 23.4% year over year. The reservoir sits 21% above its 5-year median at 80% of capacity. Storage has risen 0.9% over the week but fallen 1.6% from a month prior.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 274,722 af | 272,327 af | +0.9% |
| Month over month | 274,722 af | 279,096 af | -1.6% |
| Year over year | 274,722 af | 222,580 af | +23.4% |
| vs 5-yr median | 274,722 af | 227,786 af | +20.6% |
| Measure | Value |
|---|---|
| Latest reading, Oct 15, 2026 | 6,498.15 ft above sea level |
| Change from a week earlier | +0.33 ft |
| Change from a year earlier | +7.5 ft |
| 5-yr median for the date | 6,491.43 ft |
| Below full pool | 7.85 ft |
| Five-year low | 6,467.67 ft (Apr 14, 2023) |
| Five-year high | 6,504.95 ft (Jul 22, 2022) |
| Measure | Value | Source |
|---|---|---|
| Full pool elevation | 6,506 ft above sea level (top of active conservation pool) | USBR |
| Maximum depth at the dam | 121 ft | USBR |
| Surface area at full pool | 7,861 acres | USBR |
| Total capacity | 345,360 acre-feet | USBR |
Previous weeks
An earlier week
Fontenelle storage stands at 273,632 af, up 22.6% from last year. The reservoir sits 20% above its 5-year median at 79% of capacity. Month over month, storage fell 2.2%.
Week of Oct 7, 2026
Fontenelle storage is at 272,689 af, down 3.8% on the month. The reservoir sits 18% above the 5-year median and holds 79% of capacity. Year-over-year, storage is up 19.9%.
Week of Sep 23, 2026
Fontenelle storage stands at 276,396 af, 14% above the 5-yr median and at 80% of capacity. The reservoir dropped 0.8% over the week and 3.8% over the month. Year over year, storage is 15.8% higher.
Week of Sep 15, 2026
Fontenelle storage stood at 279,096 af, down 1.3% on the week and 4.1% on the month, but up 13.4% year over year. The reservoir sits 12% above its 5-year median at 81% of capacity.
About Fontenelle Reservoir
Fontenelle Reservoir's water level is 6,498.15 feet above sea level as of Oct 15, 2026, 7.85 feet below full pool (6,506 feet), with 274,722 acre-feet in storage (80% of capacity). That is 0.33 feet higher than a week earlier and 7.5 feet higher than a year earlier.
Fontenelle Dam holds the Green River in southwest Wyoming above Flaming Gorge, the central feature of the Seedskadee Project and a Colorado River Storage Project reservoir. Reclamation runs it for storage, hydropower, and flow regulation. A leak nearly failed the dam in 1965, soon after its first filling, before crews drew the reservoir down and repaired the embankment.
Total capacity is 345,360 af, over the past five years storage has ranged from 103,386 af to 325,765 af.
Fontenelle Reservoir is one of the 21 major reservoirs this site totals each day, and one of several it tracks in the Green-Colorado basin. For the combined picture, western reservoir levels carries the storage of all 21 on one chart, which is the number to watch when the question is about the West as a whole rather than about this project.
Those figures describe the reservoir at full pool, not today. The chart at the top of this page tracks storage in acre-feet and the elevation table tracks the water surface in feet, so read storage against total capacity for how full the reservoir is, and the elevation against the full pool elevation and maximum depth for the size of the water column behind the dam. The two do not move together one for one: a reservoir narrows as it deepens, so one holding half its capacity still stands more than half as deep.
Sources: full pool elevation and surface area from the Bureau of Reclamation; maximum depth from the Bureau of Reclamation; total capacity from the Bureau of Reclamation.