Colstrip

Coal power plant in Montana, United States of America. Approximate location 45.8831, -106.614.

CoalMontanaUnited States of America

Colstrip is a 2,363 MW coal power station in Montana, United States of America. It is operated by Talen Montana LLC. Based on reported annual generation of 13,408 GWh, it can supply roughly 3,830,771 homes. It ranks #53 of 9,833 United States of America power plants by installed capacity. Commissioned in 1982, it is around 44 years old — long-established. In context, coal supplies about 16.3% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

2,363MW installed capacity
13,408GWh reported / yr
3,830,771homes powered
1982commissioned (~44 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0006076.

~13,407,700 t CO₂/yr (estimated) — in everyday terms

This facility's annual emissions are roughly equivalent to:

3,125,338passenger cars driven for a year
1,748,526homes' yearly energy use
223,461,667tree seedlings grown 10 years to absorb it

Estimated, not measured: from reported annual generation × a typical coal emission factor (~1000 g CO₂/kWh, IPCC AR5 / US EIA). Actual emissions depend on plant efficiency and running hours.Equivalencies via US EPA Greenhouse Gas Equivalencies.

Reported generation trend

2013: 12,738 GWh20132014: 13,730 GWh20142015: 14,844 GWh20152016: 13,359 GWh20162017: 13,338 GWh20172018: 12,657 GWh20182019: 13,408 GWh201915k GWh

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Talen Montana LLC. All plants by this company →

Local climate & thermal context

This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a cold semi-arid steppe climate (Köppen BSk) — Northern Hemisphere, latitude 45.9°N — which shapes how much energy it can produce and how its output varies through the year.

7.5°Cannual mean temp
3,987heating degree-days (base 18°C)
187cooling degree-days (base 18°C)
1,013 melevation

Monthly mean temperature

J: -6 °CJF: -3 °CFM: 1 °CMA: 7 °CAM: 12 °CMJ: 18 °CJJ: 21 °CJA: 21 °CAS: 15 °CSO: 8 °CON: 1 °CND: -5 °CD21 °C

Heating degree-days here run 62% above 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: 84/100 — this site sits in the top third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

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.

How it compares & nearby plants

The #20 largest coal power plant of 286 in United States of America by capacity.

United States of America has 286 coal power plants in this dataset, together about 249,149 MW of capacity.

Nearby power plants

Location

Coordinates 45.8831, -106.614 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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