Mammoth Plains

Wind power plant in Oklahoma, United States of America. Approximate location 35.9789, -98.7103.

WindOklahomaUnited States of America

Mammoth Plains is a 199 MW wind power station in Oklahoma, United States of America. It is operated by Mammoth Plains Wind Project. Based on reported annual generation of 817 GWh, it can supply roughly 233,400 homes. It ranks #1298 of 9,833 United States of America power plants by installed capacity. Commissioned in 2015, it is around 11 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, wind supplies about 10.3% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

199MW installed capacity
817GWh reported / yr
233,400homes powered
2015commissioned (~11 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0059284.

Reported generation trend

2014: 49 GWh20142015: 798 GWh20152016: 835 GWh20162017: 789 GWh20172018: 827 GWh20182019: 817 GWh2019835 GWh

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

Owner

Operated by Mammoth Plains Wind Project.

Local climate & thermal context

This wind plant converts the kinetic energy of wind into electricity through turbine rotors. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 36.0°N — which shapes how much energy it can produce and how its output varies through the year.

14.8°Cannual mean temp
2,077heating degree-days (base 18°C)
944cooling degree-days (base 18°C)
523 melevation

Monthly mean temperature

J: 2 °CJF: 4 °CFM: 9 °CMA: 15 °CAM: 20 °CMJ: 25 °CJJ: 28 °CJA: 27 °CAS: 22 °CSO: 16 °CON: 8 °CND: 3 °CD28 °C

Heating degree-days here run 16% 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: 44/100 — this site sits in the mid 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 #186 largest wind power plant of 1139 in United States of America by capacity.

United States of America has 1139 wind power plants in this dataset, together about 104,477 MW of capacity.

Nearby power plants

Location

Coordinates 35.9789, -98.7103 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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