# Callaway Energy Center

MISO asset profile · https://askthegrid.com/assets/facilities/callaway-energy-center

Union Electric Co - (MO) - Callaway County - MISO

Callaway Energy Center is a nuclear generating station in Callaway County, Missouri, associated with the MISO registry. The EIA plant baseline lists 1,235.8 MW of nameplate capacity. Ameren's 2026 facilities fact sheet lists 1,194 MW and says the station began operation in 1984. The profile preserves the source-specific capacity figures rather than treating them as interchangeable.

## Metrics

- **Nameplate capacity:** 1235.8 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 6153 — plant-6153

## Facts

- **Technology:** Nuclear
- **Operator:** Union Electric Co - (MO)

## Sources

- [ameren.com](https://www.ameren.com/-/media/files/our-company/about/info/amo-fact-sheet.ashx) — ameren.com · public_source — Source retained for exact-record publication review.
- [eia.gov](https://www.eia.gov/electricity/data/eia860m/) — eia.gov · authoritative — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/callaway-energy-center

Source: Ask the Grid — https://askthegrid.com/