Plummer Cogen
Plummer Cogen is a 6 MW biomass power plant in Benewah County, Idaho, operated by Stimson Lumber Company. EIA-860M lists 1 generating unit here. Its unit entered service in 1982.
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
- 6.2 MW
- 5.8 MW net summer
- Generating units
- 1
- In service
- 1982
- EIA plant ID
- 55090
Where it is
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- County
- Benewah County, Idaho
- Coordinates
- 47.331, -116.8904
- Balancing authority
- AVA
- Sector
- IPP CHP
Units, technology and status
- Operator of record
- Stimson Lumber Company
- Primary energy source
- Biomass
- Technologies
- Wood/Wood Waste Biomass
- Status
- Out of service and NOT expected to return to service in next calendar year
Plummer Cogen: FAQ
- Where is Plummer Cogen?
- In Benewah 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 Plummer Cogen?
- 6 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Plummer Cogen?
- EIA-860M names Stimson Lumber Company 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 Plummer Cogen LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Stimson Lumber Company 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 "Plummer Cogen LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Plummer Cogen still running?
- EIA-860M files it as "Out of service and NOT expected to return to service in next calendar year" for 2026-07. Statuses change monthly, and this page follows the monthly release.