St. Mary Clean Energy Center
St. Mary Clean Energy Center is a 51 MW power plant in St Mary County, Louisiana, operated by Cleco Power LLC. EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 2019.
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
- 50.9 MW
- 41.1 MW net summer
- Generating units
- 1
- In service
- 2019
- EIA plant ID
- 60610
Where it is
Loading map…
- County
- St Mary County, Louisiana
- Coordinates
- 29.6846, -91.4706
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Cleco Power LLC
- Primary energy source
- Other
- Technologies
- All Other
- Status
- Operating
St. Mary Clean Energy Center: FAQ
- Where is St. Mary Clean Energy Center?
- In St Mary County, Louisiana (LA). 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 St. Mary Clean Energy Center?
- 51 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns St. Mary Clean Energy Center?
- EIA-860M names Cleco Power LLC 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 St. Mary Clean Energy Center LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Cleco Power LLC 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 "St. Mary Clean Energy Center LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is St. Mary Clean Energy Center still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.