Diamond Willow Wind Facility
Wind power plant · Fallon County, Montana
Nameplate capacity
30 MW
Rank in Montana
#38
of 73 plants
In service since
2007
December 2007
Details
- Primary fuel
- Wind
- Technology
- Onshore Wind Turbine
- Operator
- Montana-Dakota Utilities Co
- County
- Fallon County
- Generating units
- 1
- Share of state capacity
- 0.39%
- Rank among wind plants in Montana
- #14 of 23
- EIA plant code
- 56782
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| DIAW | Onshore Wind Turbine | 30 MW | 30 MW | 2007 | 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
| Colstrip Energy LP | Coal | 46 MW |
| Spion Kop Wind Farm | Wind | 40 MW |
| OREG 1 Inc | Other | 30 MW |
| OREG 2 Inc | Other | 30 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 30 MW solar plant and a 30 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