Power plant · Oklahoma, United States
Mammoth Plains Energy Storage II
Mammoth Plains Energy Storage II is a planned power plant in Oklahoma, United States, with 101 MW of capacity, owned by Mammoth Plains Energy Center, LLC.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | Oklahoma | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Status | Planned | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Start year | 2029 | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Owner | Mammoth Plains Energy Center, LLC | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Operator | Mammoth Plains Energy Center, LLC | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Capacity | 101 MW | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Technology | Batteries | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Coordinates | 35.9797, -98.7061 | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
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How it compares
Mammoth Plains Energy Storage II is the 14th-largest of 15 power plants planned, permitted or under construction in Oklahoma and the 773rd-largest of 835 in the United States by capacity; its 101 MW is <0.1% of the 282,375 MW of power plants planned, permitted or under construction we hold for the United States. It is not built yet, so it is ranked among the power plants planned, permitted or under construction in our data, apart from the ones running today. Ranks and totals cover the ones that report their capacity.
| Within | Rank | Total | Share |
|---|---|---|---|
| Oklahoma | 14th of 15 | 3,154 MW | 3.2% |
| United States | 773rd of 835 | 282,375 MW | <0.1% |
| All power plants planned, permitted or under construction in our data | 1,269th of 6,455 | 664,240 MW | <0.1% |
Owner, operator and place
Other power plants in Oklahoma
- Muskogee1,716 MW
- Seminole (OK)1,701 MW
- Northeastern1,478 MW
- Redbud Power Plant1,434 MW
- Kiamichi Energy Facility1,370 MW
- Oneta Energy Center1,214 MW
- GREC1,194 MW
- Sooner1,138 MW
Data on this page
- DESNZ Renewable Energy Planning Database (REPD). DESNZ Renewable Energy Planning Database (REPD), Open Government Licence v3.0.
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
- Planning Inspectorate: National Infrastructure Projects. Planning Inspectorate: National Infrastructure Projects, Open Government Licence v3.0.
- RVO SDE(+)(+) projecten in beheer and SDE viewer. RVO SDE(+)(+) projecten in beheer and SDE viewer, Free reuse, no attribution required.