Hardin Generator Project
Coal power plant · Big Horn County, Montana
Nameplate capacity
116 MW
Rank in Montana
#16
of 73 plants
In service since
2006
March 2006
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- Heorot Power Management
- County
- Big Horn County
- Generating units
- 1
- Share of state capacity
- 1.51%
- Rank among coal plants in Montana
- #2 of 4
- EIA plant code
- 55749
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| UNT1 | Conventional Steam Coal | 116 MW | 107 MW | 2006 | 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
| Fort Peck | Hydro | 180 MW |
| Judith Gap Wind Energy Center | Wind | 135 MW |
| Culbertson Generation Station | Natural gas | 108 MW |
| NaturEner Glacier Wind Energy 1 | Wind | 107 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 116 MW solar plant and a 116 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