Hidden Hollow Energy
Hidden Hollow Energy is a 3 MW biomass power plant in Ada County, Idaho, operated by Hidden Hollow Energy LLC. EIA-860M lists 2 generating units here. Its units entered service in 2007.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 3.2 MW
- 3 MW net summer
- Generating units
- 2
- In service
- 2007
- EIA plant ID
- 57861
Where it is
Loading map…
- County
- Ada County, Idaho
- Coordinates
- 43.6972, -116.2714
- Balancing authority
- IPCO
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Hidden Hollow Energy LLC
- Primary energy source
- Biomass
- Technologies
- Landfill Gas
- Status
- Operating
Hidden Hollow Energy: FAQ
- Where is Hidden Hollow Energy?
- In Ada County, Idaho (ID). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Hidden Hollow Energy?
- 3 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
- Who owns Hidden Hollow Energy?
- EIA-860M names Hidden Hollow Energy LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Hidden Hollow Energy LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Hidden Hollow Energy LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Hidden Hollow Energy LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Hidden Hollow Energy still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.