Callaway
Callaway is a 1 GW nuclear power plant in Callaway County, Missouri, operated by Union Electric Co - (MO). EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 1984.
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
- 1,235.8 MW
- 1,190 MW net summer
- Generating units
- 1
- In service
- 1984
- EIA plant ID
- 6153
Where it is
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- County
- Callaway County, Missouri
- Coordinates
- 38.7589, -91.7788
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Union Electric Co - (MO)
- Primary energy source
- Nuclear
- Technologies
- Nuclear
- Status
- Operating
Callaway: FAQ
- Where is Callaway?
- In Callaway County, Missouri (MO). 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 Callaway?
- 1 GW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Callaway?
- EIA-860M names Union Electric Co - (MO) 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 Callaway LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Union Electric Co - (MO) 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 "Callaway LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Callaway still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.