Johnson County 345kV Substation (GEN-2026-SR11)
Johnson County 345kV Substation is a 258.0 MW battery interconnection project in Mill Creek, Oklahoma with a current status of active. It is proposed to connect at Johnson County 345kV Substation.
258.0 MWCapacity
ActiveStatus
OKMarket
BatteryTechnology
Project facts
| Canonical name | Johnson County 345kV Substation |
|---|---|
| Queue ID | GEN-2026-SR11 |
| Status | active |
| Source status | SPECIAL STUDY |
| Market | OK |
| Technology | Battery |
| Capacity | 258.0 MW |
| State | Oklahoma |
| County | Mill Creek |
| Point of interconnection | Johnson County 345kV Substation |
| Requested (queue) date | 2026-01-26 |
| Proposed in-service date | 2028-10-01 |
| Operational date | — |
| Withdrawn date | — |
| Developer | — |
| Utility / transmission owner | OGE |
What changed
| Observed | Field | Old value | New value | Materiality |
|---|---|---|---|---|
| 2026-07-31 | new_project | — | active | high |
Explore related data
Source last checked2026-08-28
Data last materially changed2026-08-28
Page data generated2026-08-28
Provenance: Southwest Power Pool — generator interconnection queue. Values are normalized from public source records into the interXdata canonical warehouse; see each source for original filings.
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