Mammoth Plains Energy Storage II (70443_MAMM2)
Mammoth Plains Energy Storage II is a 101.2 MW battery interconnection project in Dewey, Oklahoma with a current status of active.
101.2 MWCapacity
ActiveStatus
SWPPMarket
BatteryTechnology
Project facts
| Canonical name | Mammoth Plains Energy Storage II |
|---|---|
| Queue ID | 70443_MAMM2 |
| Status | active |
| Source status | (P) Planned for installation, but regulatory approvals not initiated |
| Market | SWPP |
| Technology | Battery |
| Capacity | 101.2 MW |
| State | Oklahoma |
| County | Dewey |
| Point of interconnection | — |
| Requested (queue) date | — |
| Proposed in-service date | 2029-05-01 |
| Operational date | — |
| Withdrawn date | — |
| Developer | — |
| Utility / transmission owner | Mammoth Plains Energy Center, LLC |
What changed
| Observed | Field | Old value | New value | Materiality |
|---|---|---|---|---|
| 2026-10-02 | new_project | — | active | high |
Explore related data
Source last checked2026-10-02
Data last materially changed2026-10-02
Page data generated2026-10-12
Provenance: U.S. EIA — Form EIA-860M generator inventory (operating + planned). Values are normalized from public source records into the interXdata canonical warehouse; see each source for original filings.
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