Plant Four
Plant Four is a 24 MW oil-fired power plant in Marquette County, Michigan, operated by City of Marquette - (MI). EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 1979.
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
- 24 MW
- 20 MW net summer
- Generating units
- 1
- In service
- 1979
- EIA plant ID
- 1840
Where it is
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- County
- Marquette County, Michigan
- Coordinates
- 46.576, -87.4036
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- City of Marquette - (MI)
- Primary energy source
- Petroleum
- Technologies
- Petroleum Liquids
- Status
- Standby/Backup
Plant Four: FAQ
- Where is Plant Four?
- In Marquette County, Michigan (MI). 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 Plant Four?
- 24 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Plant Four?
- EIA-860M names City of Marquette - (MI) 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 Plant Four LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — City of Marquette - (MI) 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 "Plant Four LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Plant Four still running?
- EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.