Mason 138 kV Substation (J1454)
Mason 138 kV Substation is a 58.5 MW wind interconnection project in Mason County, Illinois with a current status of operational. It is proposed to connect at Mason 138 kV Substation.
58.5 MWCapacity
OperationalStatus
—Market
WindTechnology
Project facts
| Canonical name | Mason 138 kV Substation |
|---|---|
| Queue ID | J1454 |
| Status | operational |
| Source status | Done |
| Market | — |
| Technology | Wind |
| Capacity | 58.5 MW |
| State | Illinois |
| County | Mason County |
| Point of interconnection | Mason 138 kV Substation |
| Requested (queue) date | 2019-04-29 |
| Proposed in-service date | 2022-04-30 |
| Operational date | 2022-04-30 |
| Withdrawn date | — |
| Developer | — |
| Utility / transmission owner | AMEREN ILLINOIS |
Cross-source records
This project is also observed in: Lawrence Berkeley National Laboratory — Queued Up interconnection dataset. interXdata links these source records without double-counting the project.
What changed
| Observed | Field | Old value | New value | Materiality |
|---|---|---|---|---|
| 2026-07-29 | new_project | — | operational | high |
Explore related data
Source last checked2026-08-27
Data last materially changed2026-08-27
Page data generated2026-08-27
Provenance: MISO — 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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