Cogeneration power plant in Louisiana, United States of America. Approximate location 29.6846, -91.4706.
CogenerationLouisianaUnited States of AmericaCO₂ modelled
St. Mary Clean Energy Center is a 58 MW cogeneration power plant in Louisiana, United States of America. It is operated by Cleco Power LLC. Based on reported annual generation of 85 GWh, it can supply roughly 24k homes. It ranks #3522 of 10,938 United States of America power plants by installed capacity. Commissioned in 2019, it is around 7 years old — recently built. Its modelled annual emissions are 48,747 t CO₂/yr (Climate TRACE), equivalent to about 11k cars driven for a year. In context, the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0060610.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and fuel fields on this page are source-record values from the upstream open dataset. They are useful for identification and ranking, but they have not been upgraded to a 2026 registry/GEM-location verified value.
capacity: WRI Global Power Plant Database source-record (legacy); fuel: WRI source-record fuel
At 58 MW, St. Mary Clean Energy Center is well above the median cogeneration plant in United States of America (26 MW). This facility converts its energy source into electricity for the grid; its capacity, fuel type and location determine its role in the national power mix.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Cleco Power LLC. All plants by this company →
This cogeneration plant produces electricity and useful heat together for higher fuel efficiency. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 29.7°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 76% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 22/100 — this site sits in the bottom third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
For a plant’s outdoor hardware — heat-recovery steam generators (HRSG), expansion joints, valves, flanges and their insulation — the local climate sets how fast unprotected steel and coatings degrade. This site sits in an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion the leading environmental stress.
Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
The #5 largest cogeneration power plant of 34 in United States of America by capacity.
United States of America has 34 cogeneration power plants in this dataset, together about 1,037 MW of capacity.
Coordinates 29.6846, -91.4706 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
St. Mary Clean Energy Center is a 58 MW source-record cogeneration power plant in Louisiana, United States of America, commissioned in 2019.
St. Mary Clean Energy Center generates about 85 GWh of electricity per year.
Its output is enough to supply roughly 24,200 homes.
St. Mary Clean Energy Center is operated by Cleco Power LLC.
St. Mary Clean Energy Center has modelled emissions of about 48,747 tonnes of CO₂ per year (Climate TRACE).
