Heart Mountain
Hydro power plant · Park County, Wyoming
Nameplate capacity
5.0 MW
Rank in Wyoming
#61
of 71 plants
In service since
1948
December 1948
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- U S Bureau of Reclamation
- County
- Park County
- Generating units
- 1
- Share of state capacity
- 0.04%
- Rank among hydro plants in Wyoming
- #10 of 16
- EIA plant code
- 6408
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 5.0 MW | 5.0 MW | 1948 | 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 Wyoming
| Beaver Creek Gas Plant | Natural gas | 6.8 MW |
| Guernsey | Hydro | 6.4 MW |
| Sinclair Oil Refinery | Natural gas | 5.0 MW |
| Spirit Mountain | Hydro | 4.5 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 5.0 MW solar plant and a 5.0 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 Wyoming power plants · What Wyoming actually generates