STP Unit2 High Pressure Turbine Upgrade (27INR0557)
STP Unit2 High Pressure Turbine Upgrade is a 1,336.5 MW other interconnection project in Matagorda, Texas with a current status of operational. It is proposed to connect at 5915 SO_TEX__345A 345 kV.
1,336.5 MWCapacity
OperationalStatus
MatagordaMarket
OtherTechnology
Project facts
| Canonical name | STP Unit2 High Pressure Turbine Upgrade |
|---|---|
| Queue ID | 27INR0557 |
| Status | operational |
| Source status | SS Completed, FIS Started, No IA |
| Market | Matagorda |
| Technology | Other |
| Capacity | 1,336.5 MW |
| State | Texas |
| County | Matagorda |
| Point of interconnection | 5915 SO_TEX__345A 345 kV |
| Requested (queue) date | 2026-04-30 |
| Proposed in-service date | — |
| Operational date | 2027-04-23 |
| Withdrawn date | — |
| Developer | Constellation Energy Generation, LLC |
| Utility / transmission owner | ERCOT |
What changed
| Observed | Field | Old value | New value | Materiality |
|---|---|---|---|---|
| 2026-08-31 | phase | SS Started, FIS Started, No IA | SS Completed, FIS Started, No IA | low |
| 2026-08-31 | operational_date | — | 2027-04-23 | medium |
| 2026-08-31 | proposed_online_date | 2027-04-23 | — | medium |
| 2026-08-31 | status | active | operational | high |
| 2026-07-31 | new_project | — | active | high |
Explore related data
Source last checked2026-09-30
Data last materially changed2026-09-30
Page data generated2026-10-11
Provenance: ERCOT — Generation Interconnection Status (GIS) report. Values are normalized from public source records into the interXdata canonical warehouse; see each source for original filings.
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