Johnsonburg Mill
Johnsonburg Mill is a 54 MW biomass power plant in Elk County, Pennsylvania, operated by Domtar LLC. EIA-860M lists 1 generating unit here, inside PJM. Its unit entered service in 1993.
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
- 54 MW
- 49 MW net summer
- Generating units
- 1
- In service
- 1993
- EIA plant ID
- 54638
Where it is
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- County
- Elk County, Pennsylvania
- Coordinates
- 41.4915, -78.6758
- Balancing authority
- PJM
- Sector
- Industrial CHP
Units, technology and status
- Operator of record
- Domtar LLC
- Primary energy source
- Biomass
- Technologies
- Wood/Wood Waste Biomass
- Status
- Operating
Johnsonburg Mill: FAQ
- Where is Johnsonburg Mill?
- In Elk County, Pennsylvania (PA). 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 Johnsonburg Mill?
- 54 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Johnsonburg Mill?
- EIA-860M names Domtar 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 Johnsonburg Mill LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Domtar 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 "Johnsonburg Mill LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Johnsonburg Mill still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.