Fontenelle Reservoir Water Level
On the Green River in southwest Wyoming, upstream of Flaming Gorge. Fontenelle stores water for industrial and irrigation use and generates hydropower.
USBR daily reading for Oct 23, 2026
- PERCENT FULL
- 80.8%
- 7-DAY CHANGE
- +0.9 pts
- ELEVATION
- 6,498.7 ft
- water surface, above sea level
- ACRE-FEET
- 278.9K
- of 345.4K capacity
- GALLONS
- 90.90B
- of 112.54B
Water balance, 7 days to Oct 23, 2026
- Inflow
- 13,621 af
- Reclamation's measured inflow
- Release
- 10,164 af
- Water passed downstream through the dam
- Change in storage
- +3,209 af
- From the daily storage readings; the difference from inflow minus release is evaporation, diversions and rounding
Trend
- 7 days
- +0.9 pts
- vs. the reading a week earlier
- 1 year
- +13.5 pts
- vs. end of Sep 2025 (67.3%)
- 10-year low
- 27.5%
- end of Mar 2019
- 10-year high
- 95.5%
- end of Jul 2020
Yearly figures and the high/low compare end-of-month storage from Reclamation's monthly series with the latest daily reading. This site does not project future levels; for official 24-month projections see Reclamation's 24-Month Study. How each figure is derived is explained in the FAQ.
10-Year Historical Trend
End-of-month storage as a percent of capacity. Source: U.S. Bureau of Reclamation. Dashed lines are this site's warning (50%) and critical (30%) marks.
About Fontenelle Reservoir
Fontenelle Reservoir is on the Green River in WY. Reclamation's capacity figure for it is 345,360 acre-feet (total capacity), about 112.54B gallons.
On the Green River in southwest Wyoming, upstream of Flaming Gorge. Fontenelle stores water for industrial and irrigation use and generates hydropower.
As of Oct 23, 2026, the reservoir held 278,950 acre-feet, 80.8% of capacity, up 0.9 pts from the reading seven days earlier, with the water surface at 6,498.7 feet above sea level. Storage figures are U.S. Bureau of Reclamation daily readings; recent values are provisional and may be revised.
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