Power plants in St Mary Parish, Louisiana
5 operating power plants in St Mary Parish, Louisiana, with 203 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Largest power plants in St Mary Parish
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | LEPA Unit No. 1Natural gas | 74 | −5.0 | – |
| 2 | St. Mary Clean Energy CenterOther fuels | 51 | 181 | 40.7% |
| 3 | TecheNatural gas | 42 | 5.5 | 1.5% |
| 4 | Ivanhoe Generation FacilityOther fuels | 31 | 72.2 | 26.6% |
| 5 | Neptune Gas Processing PlantOther fuels | 4.5 | 14.1 | 35.8% |
MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources
More power plant lists for Louisiana
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Other counties in Louisiana
Calcasieu Parish11 plants · 3,903 MWOuachita Parish6 plants · 2,021 MWSt Charles Parish6 plants · 4,866 MWOrleans Parish5 plants · 156 MWPointe Coupee Parish5 plants · 2,197 MWCaddo Parish4 plants · 1,050 MWEast Baton Rouge Parish4 plants · 619 MWIberville Parish4 plants · 2,669 MWSt James Parish4 plants · 136 MW