Reservoir · Wyoming · United States · USACE CWMS
Keyhole Dam & Reservoir
31.6% full
Capacity
412.25 hm³
Volume stored
130 hm³
Coordinates
44.383°N, 104.779°W
Last updated
2026-06-11
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: USACE CWMS — US Army Corps of Engineers — 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: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 44.383, -104.779 · Open in Google Maps
About Keyhole Dam & Reservoir
As of June 11, 2026, Keyhole Dam & Reservoir 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 Dam & Reservoir — 1825 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 31.6% (June 11, 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 USACE primarily for multiple purposes. It lies within the Wyoming basin at 44.383°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
- USACE
- Coordinates
- 44.383°N, 104.779°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 31.6% | 130 |
| 10 Jun 2026 | 31.7% | 131 |
| 9 Jun 2026 | 31.8% | 131 |
| 8 Jun 2026 | 31.9% | 131 |
| 7 Jun 2026 | 31.9% | 132 |
| 6 Jun 2026 | 32.0% | 132 |
| 5 Jun 2026 | 32.1% | 132 |
| 4 Jun 2026 | 32.0% | 132 |
| 3 Jun 2026 | 32.0% | 132 |
| 2 Jun 2026 | 32.1% | 132 |
| 1 Jun 2026 | 32.2% | 133 |
| 31 May 2026 | 32.2% | 133 |
Frequently asked questions
What is the current water level of Keyhole Dam & Reservoir?
As of June 11, 2026, Keyhole Dam & Reservoir is at 31.6% of its capacity, holding approximately 130 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Keyhole Dam & Reservoir reservoir full?
No. As of June 11, 2026, Keyhole Dam & Reservoir is low at 31.6% of its capacity, so it is not full.
Is the water level at Keyhole Dam & Reservoir rising or falling?
The level at Keyhole Dam & Reservoir has been broadly stable over the latest week on record (-0.1 points).
How much water can Keyhole Dam & Reservoir hold?
Keyhole Dam & Reservoir has a total capacity of 412 hm³.
Where is Keyhole Dam & Reservoir reservoir located?
Keyhole Dam & Reservoir is located in Wyoming, United States, within the Wyoming basin (coordinates 44.383°N, 104.779°W).
What is Keyhole Dam & Reservoir used for?
Keyhole Dam & Reservoir is used primarily for multiple purposes, and is managed by USACE.