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# Fontenelle Reservoir water level

Live reservoir storage and water level in Green-Colorado basin, Wyoming

_Data through Aug 25, 2026 · source last checked Aug 27, 2026 · page revised Aug 27, 2026_

> Now 287,243 af, 7% above the 5-yr median, 83% of capacity.

Fontenelle holds 287,243 af, up 8.1% from a year ago and 7% above the 5-year median. The reservoir released 1.2% on the week but gained 1.1% over the month and sits at 83% of capacity.

## The numbers

| Period | Current | Prior | Change |
| --- | --- | --- | --- |
| Week over week | 287,243 af | 290,712 af | -1.2% |
| Month over month | 287,243 af | 284,226 af | +1.1% |
| Year over year | 287,243 af | 265,698 af | +8.1% |
| vs 5-yr median | 287,243 af | 269,003 af | +6.8% |

### Reservoir facts

| 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 |

## About Fontenelle Reservoir

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 20 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](/reservoir/tracked-total) carries the storage of all 20 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 rather than water depth, so read the current figure against total capacity for how full the reservoir is, and 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](https://www.usbr.gov/tsc/techreferences/reservoir/FontenelleReservoir2019SedimentationSurvey_final508.pdf); maximum depth from [the Bureau of Reclamation](https://www.usbr.gov/projects/index.php?id=288); total capacity from the Bureau of Reclamation.

## 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 period: Daily reading
- Last observation: Aug 25, 2026
- Update frequency: Daily

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Cite: Fontenelle Reservoir water level is 7% above its 5-yr median for the date. The Waterline, data through Aug 25, 2026. https://the-waterline.com/reservoir/fontenelle-reservoir
Canonical URL: https://the-waterline.com/reservoir/fontenelle-reservoir