Hidden Hollow Energy
Other power plant · Ada County, Idaho
Nameplate capacity
3.2 MW
Rank in Idaho
#121
of 155 plants
In service since
2007
January 2007
Details
- Primary fuel
- Other
- Technology
- Landfill Gas
- Operator
- Hidden Hollow Energy LLC
- County
- Ada County
- Generating units
- 2
- Share of state capacity
- 0.05%
- Rank among other plants in Idaho
- #10 of 14
- EIA plant code
- 57861
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| UNT1 | Landfill Gas | 1.6 MW | 1.5 MW | 2007 | Operating |
| UNT2 | Landfill Gas | 1.6 MW | 1.5 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 Idaho
| Bannock County LFG to Energy | Other | 3.2 MW |
| Fighting Creek LFGTE Plant | Other | 3.2 MW |
| West Point RNG | Other | 3.2 MW |
| Mink Creek Hydro | Hydro | 3.1 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 3.2 MW solar plant and a 3.2 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 Idaho power plants · What Idaho actually generates