Nameplate capacity
12 MW
Rank in Montana
#50
of 73 plants
In service since
2025
May 2025
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- NorthWestern Energy (MT Hydro)
- County
- Stillwater County
- Generating units
- 2
- Share of state capacity
- 0.16%
- Rank among hydro plants in Montana
- #18 of 23
- EIA plant code
- 2192
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| MYS1 | Conventional Hydroelectric | 6.0 MW | 6.0 MW | 2025 | Operating |
| MYS2 | Conventional Hydroelectric | 6.0 MW | 6.0 MW | 2025 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Montana
| Madison Dam | Hydro | 16 MW |
| Turnbull Hydro | Hydro | 13 MW |
| Fairfield Wind | Wind | 10 MW |
| Musselshell Wind Project | Wind | 10 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 12 MW solar plant and a 12 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Montana power plants · What Montana actually generates