Mark One Power Station — United States of America
Gas power plant in Texas, United States of America. Approximate location 29.2271, -95.4308.
GasTexasUnited States of AmericaOCGTCO₂ modelled
Mark One Power Station is a 488 MW gas power station in Texas, United States of America. It is operated by Mark One Generating LLC. Based on its capacity (estimated), it can supply roughly 550k homes (estimated). It ranks #1250 of 10,884 United States of America power plants by installed capacity. Commissioned in 2022, it is around 4 years old — recently built. Its modelled annual emissions are 462,830 t CO₂/yr (Climate TRACE), equivalent to about 108k cars driven for a year. 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 CT-734.
Data status
Known data
Modelled source data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Capacity provenance
The public capacity above is the current source-record value. A 2026 tracker candidate lists 488 MW for Mark One power station, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).
Data provenance
Source of the capacity and fuel values:
capacity: GEM · 2026 · L100000408052; fuel: Climate TRACE
In context: how this plant compares
At 488 MW, Mark One Power Station 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.
~462,830 t CO₂/yr (modelled) — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.
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
- 1,835 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 Mark One Generating LLC.
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 29.2°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 79% 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: 21/100 — this site sits in the bottom third of the power plants we cover by heating degree-days.
A gas turbine here also runs ~4% 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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion 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 #606 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
- Brotman power station · Gas · 484 MW · Texas
- Ascend Performance Materials Texas Inc. · Gas · 52.1 MW · Texas
- Power Island · Gas · 41 MW · Texas
- Stone Creek Peaker Plant · Gas · 204 MW · Texas
- BASF Freeport Works · Gas · 81 MW · Texas
- Freeport Energy · Gas · 678.1 MW · Texas
Location
Coordinates 29.2271, -95.4308 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Mark One Power Station?
Mark One Power Station is a 488 MW gas power plant in Texas, United States of America, commissioned in 2022.
Who operates Mark One Power Station?
Mark One Power Station is operated by Mark One Generating LLC.
How much CO₂ does Mark One Power Station emit?
Mark One Power Station has modelled emissions of about 462,830 tonnes of CO₂ per year (Climate TRACE).