Calvert Cliffs Nuclear Power Plant
Calvert Cliffs Nuclear Power Plant is a 2 GW nuclear power plant in Calvert County, Maryland, operated by Constellation Nuclear. EIA-860M lists 2 generating units here, inside PJM. Its units entered service between 1975 and 1977.
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
- 1,850.4 MW
- 1,745.2 MW net summer
- Generating units
- 2
- In service
- 1975–1977
- EIA plant ID
- 6011
Where it is
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- County
- Calvert County, Maryland
- Coordinates
- 38.4344, -76.4417
- Balancing authority
- PJM
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Constellation Nuclear
- Primary energy source
- Nuclear
- Technologies
- Nuclear
- Status
- Operating
Calvert Cliffs Nuclear Power Plant: FAQ
- Where is Calvert Cliffs Nuclear Power Plant?
- In Calvert County, Maryland (MD). 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 Calvert Cliffs Nuclear Power Plant?
- 2 GW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
- Who owns Calvert Cliffs Nuclear Power Plant?
- EIA-860M names Constellation Nuclear 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 Calvert Cliffs Nuclear Power Plant LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Constellation Nuclear 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 "Calvert Cliffs Nuclear Power Plant LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Calvert Cliffs Nuclear Power Plant still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.