<!-- canonical: https://the-waterline.com/reservoir/fontenelle-reservoir -->
<!-- Machine-readable Markdown for agents. Append .md to any page URL; index at https://the-waterline.com/llms.txt -->

# Fontenelle Reservoir water level

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

_Data through Aug 12, 2026 · source last checked Aug 13, 2026 · page revised Aug 13, 2026_

> Now 290,860 af, 5% above the 5-yr median, 84% of capacity.

Fontenelle storage stands at 291,378 af, 3% above the 5-year median and holding 84% of capacity. The reservoir refilled 9.8% over the past month, with weekly change of just +0.4%.

## The numbers

| Period | Current | Prior | Change |
| --- | --- | --- | --- |
| Week over week | 290,860 af | 291,008 af | -0.1% |
| Month over month | 290,860 af | 268,283 af | +8.4% |
| Year over year | 290,860 af | 278,292 af | +4.5% |
| vs 5-yr median | 290,860 af | 278,292 af | +4.5% |

### 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.

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 12, 2026
- Update frequency: Daily

---
Cite: Fontenelle Reservoir water level is 5% above its 5-yr median for the date. The Waterline, data through Aug 12, 2026. https://the-waterline.com/reservoir/fontenelle-reservoir
Canonical URL: https://the-waterline.com/reservoir/fontenelle-reservoir