Reservoir · Wyoming · United States · BOR RISE
Keyhole Reservoir and Dam
31.6% full
Capacity
412.25 hm³
Volume stored
130 hm³
Coordinates
44.382°N, 104.779°W
Last updated
2026-06-10
Current fill
31.6%vs 7 days ago
-0.1%losing
vs 1 year ago
-1.3%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: 2026-06-10.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 44.382, -104.779 · Open in Google Maps
About Keyhole Reservoir and Dam
As of June 10, 2026, Keyhole Reservoir and Dam is filled to 31.6% of its total capacity, holding roughly 130 hm³ of water out of a maximum 412 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it is 1.3 points below its level on the same date a year earlier.
Across the readings we hold for Keyhole Reservoir and Dam — 1826 data points between June 13, 2021 and June 10, 2026 — the level has ranged from a low of 31.6% (June 10, 2026) to a high of 45.1% (June 13, 2021). On average the reservoir is fullest around July and at its lowest around December.
It is operated by BOR primarily for multiple purposes. It lies within the Wyoming basin at 44.382°N, 104.779°W.
Key facts
- Current fill level
- 31.6%
- Water stored
- 130 hm³
- Total capacity
- 412 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▼ 1.3 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- BOR
- Coordinates
- 44.382°N, 104.779°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 31.6% | 130 |
| 9 Jun 2026 | 31.7% | 131 |
| 8 Jun 2026 | 31.8% | 131 |
| 7 Jun 2026 | 31.9% | 131 |
| 6 Jun 2026 | 31.9% | 132 |
| 5 Jun 2026 | 32.0% | 132 |
| 4 Jun 2026 | 32.1% | 132 |
| 3 Jun 2026 | 32.0% | 132 |
| 2 Jun 2026 | 32.0% | 132 |
| 1 Jun 2026 | 32.1% | 132 |
| 31 May 2026 | 32.2% | 133 |
| 30 May 2026 | 32.2% | 133 |
Frequently asked questions
What is the current water level of Keyhole Reservoir and Dam?
As of June 10, 2026, Keyhole Reservoir and Dam is at 31.6% of its capacity, holding approximately 130 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Keyhole Reservoir and Dam reservoir full?
No. As of June 10, 2026, Keyhole Reservoir and Dam is low at 31.6% of its capacity, so it is not full.
Is the water level at Keyhole Reservoir and Dam rising or falling?
The level at Keyhole Reservoir and Dam has been broadly stable over the latest week on record (-0.1 points).
How much water can Keyhole Reservoir and Dam hold?
Keyhole Reservoir and Dam has a total capacity of 412 hm³.
Where is Keyhole Reservoir and Dam reservoir located?
Keyhole Reservoir and Dam is located in Wyoming, United States, within the Wyoming basin (coordinates 44.382°N, 104.779°W).
What is Keyhole Reservoir and Dam used for?
Keyhole Reservoir and Dam is used primarily for multiple purposes, and is managed by BOR.