Washington Parish energy center — United States of America

Washington Parish energy center is a 400 MW gas power station in Louisiana, United States of America. It is operated by Entergy Louisiana LLC [100%]. Based on its capacity (estimated), it can supply roughly 451k homes (estimated). It ranks #1375 of 10,884 United States of America power plants by installed capacity. Commissioned in 2020, it is around 6 years old — recently built. In context, gas supplies about 40.0% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id GOGPT_washingtonparishcenter_united.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000407372; fuel: GEM GOGPT

In context: how this plant compares

At 400 MW, Washington Parish energy center is well above the median gas plant in United States of America (121.2 MW). Technically it is described as OCGT. Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Share of United States of America gas capacity

less than 0.1% of 789,950 MW across 2,165 plants in this dataset

Age among peers

1,815 of 1,973 dated gas plants in United States of America are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Capacity vs largest gas plants in United States of America

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Entergy Louisiana LLC [100%].

Local climate & thermal context

This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 30.8°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 66% 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: 25/100 — this site sits in the bottom third of the power plants we cover by heating degree-days.

A gas turbine here also runs ~3% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).

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.

Site climate & environmental severity

This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.

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.

How it compares & nearby plants

The #672 largest gas power plant of 2165 in United States of America by capacity.

United States of America has 2165 gas power plants in this dataset, together about 789,950 MW of capacity.

Nearby power plants

• Gaylord Container Bogalusa · Waste · 99.5 MW · Louisiana
• District 70 Transco Gas Pipe Line · Cogeneration · 1.6 MW · Mississippi
• Morrow Generating Plant · Gas · 558 MW · Mississippi
• Sumrall II Solar Farm · Solar · 52 MW · Mississippi
• Sumrall I Solar Farm · Solar · 52 MW · Mississippi
• Hattiesburg Solar Farm · Solar · 50 MW · Mississippi

Location

Coordinates 30.791389, -89.90917 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions