St. Mary Clean Energy Center
Other power plant · St Mary County, Louisiana
Nameplate capacity
51 MW
Rank in Louisiana
#63
of 98 plants
In service since
2019
August 2019
Details
- Primary fuel
- Other
- Technology
- All Other
- Operator
- Cleco Power LLC
- County
- St Mary County
- Generating units
- 1
- Share of state capacity
- 0.17%
- Rank among other plants in Louisiana
- #8 of 21
- EIA plant code
- 60610
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | All Other | 51 MW | 41 MW | 2019 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Louisiana
| Sterlington | Natural gas | 59 MW |
| PPG Powerhouse A | Other | 53 MW |
| Iris Solar LLC | Solar | 50 MW |
| LA3 West Baton Rouge Solar Facility | Solar | 50 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 51 MW solar plant and a 51 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Louisiana power plants · What Louisiana actually generates