Reservoir · Wyoming · United States · BOR RISE
Fontenelle Reservoir Dam and Powerplant
85.6% full
Capacity
412.49 hm³
Volume stored
353 hm³
Coordinates
42.058°N, 110.097°W
Last updated
2026-07-28
Current fill
85.6%vs 7 days ago
+0.3%gaining
vs 1 year ago
+25.8%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.058, -110.097 · Open in Google Maps
About Fontenelle Reservoir Dam and Powerplant
As of July 28, 2026, Fontenelle Reservoir Dam and Powerplant is filled to 85.6% of its total capacity, holding roughly 353 hm³ of water out of a maximum 412 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts), and it is 25.8 points above its level on the same date a year earlier.
Across the readings we hold for Fontenelle Reservoir Dam and Powerplant — 1824 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 30.9% (April 13, 2023) to a high of 97.4% (July 22, 2022). On average the reservoir is fullest around July and at its lowest around March.
It is operated by BOR primarily for multiple purposes. It lies within the Wyoming basin at 42.058°N, 110.097°W.
Key facts
- Current fill level
- 85.6%
- Water stored
- 353 hm³
- Total capacity
- 412 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▲ 25.8 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- BOR
- Coordinates
- 42.058°N, 110.097°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 85.6% | 353 |
| 27 Jul 2026 | 85.3% | 352 |
| 26 Jul 2026 | 85.0% | 351 |
| 25 Jul 2026 | 84.7% | 349 |
| 24 Jul 2026 | 84.4% | 348 |
| 23 Jul 2026 | 83.9% | 346 |
| 22 Jul 2026 | 83.4% | 344 |
| 21 Jul 2026 | 83.0% | 342 |
| 20 Jul 2026 | 82.6% | 341 |
| 19 Jul 2026 | 82.2% | 339 |
| 18 Jul 2026 | 81.7% | 337 |
| 17 Jul 2026 | 81.3% | 335 |
Frequently asked questions
What is the current water level of Fontenelle Reservoir Dam and Powerplant?
As of July 28, 2026, Fontenelle Reservoir Dam and Powerplant is at 85.6% of its capacity, holding approximately 353 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Fontenelle Reservoir Dam and Powerplant reservoir full?
No. As of July 28, 2026, Fontenelle Reservoir Dam and Powerplant is high at 85.6% of its capacity, so it is not full.
Is the water level at Fontenelle Reservoir Dam and Powerplant rising or falling?
The level at Fontenelle Reservoir Dam and Powerplant has been broadly stable over the latest week on record (+0.3 points).
How much water can Fontenelle Reservoir Dam and Powerplant hold?
Fontenelle Reservoir Dam and Powerplant has a total capacity of 412 hm³.
Where is Fontenelle Reservoir Dam and Powerplant reservoir located?
Fontenelle Reservoir Dam and Powerplant is located in Wyoming, United States, within the Wyoming basin (coordinates 42.058°N, 110.097°W).
What is Fontenelle Reservoir Dam and Powerplant used for?
Fontenelle Reservoir Dam and Powerplant is used primarily for multiple purposes, and is managed by BOR.