Reservoir · Montana · United States · BOR RISE
Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant
84.9% full
Capacity
2,401.59 hm³
Volume stored
2039 hm³
Coordinates
46.649°N, 111.728°W
Last updated
2026-06-10
Current fill
84.9%vs 7 days ago
+0.3%gaining
vs 1 year ago
+6.0%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. 46.649, -111.728 · Open in Google Maps
About Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant
As of June 10, 2026, Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant is filled to 84.9% of its total capacity, holding roughly 2,039 hm³ of water out of a maximum 2,402 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 6.0 points above its level on the same date a year earlier.
Across the readings we hold for Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant — 1841 data points between June 13, 2021 and June 10, 2026 — the level has ranged from a low of 64.6% (February 26, 2022) to a high of 97.3% (July 8, 2022). On average the reservoir is fullest around July and at its lowest around February.
It is operated by BOR primarily for multiple purposes. It lies within the Montana basin at 46.649°N, 111.728°W.
Key facts
- Current fill level
- 84.9%
- Water stored
- 2,039 hm³
- Total capacity
- 2,402 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▲ 6.0 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- BOR
- Coordinates
- 46.649°N, 111.728°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 84.9% | 2,039 |
| 9 Jun 2026 | 84.6% | 2,032 |
| 8 Jun 2026 | 84.5% | 2,030 |
| 7 Jun 2026 | 84.4% | 2,026 |
| 6 Jun 2026 | 84.1% | 2,020 |
| 5 Jun 2026 | 83.9% | 2,014 |
| 4 Jun 2026 | 83.6% | 2,008 |
| 3 Jun 2026 | 83.2% | 1,998 |
| 2 Jun 2026 | 82.7% | 1,987 |
| 1 Jun 2026 | 82.2% | 1,975 |
| 31 May 2026 | 81.7% | 1,963 |
| 30 May 2026 | 81.3% | 1,953 |
Frequently asked questions
What is the current water level of Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant?
As of June 10, 2026, Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant is at 84.9% of its capacity, holding approximately 2,039 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant reservoir full?
No. As of June 10, 2026, Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant is high at 84.9% of its capacity, so it is not full.
Is the water level at Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant rising or falling?
The level at Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant has been broadly stable over the latest week on record (+0.3 points).
How much water can Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant hold?
Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant has a total capacity of 2,402 hm³.
Where is Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant reservoir located?
Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant is located in Montana, United States, within the Montana basin (coordinates 46.649°N, 111.728°W).
What is Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant used for?
Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant is used primarily for multiple purposes, and is managed by BOR.