Grid connection · Matagorda County, Texas, United States
STP Unit2 High Pressure Turbine Upgrade grid connection (ERCOT 27INR0557)
STP Unit2 High Pressure Turbine Upgrade grid connection (ERCOT 27INR0557) is a planned grid connection in Matagorda County, Texas, United States, with 1,337 MW of capacity, held by Constellation South Texas, 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 | Matagorda County (connects at 5915 SO_TEX__345A 345 kV) | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
| Status | Planned (screening study completed, full interconnection study started, no interconnection agreement) | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
| Holder | Constellation South Texas, LLC | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
| Capacity | 1,337 MW | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
| Technology | Nuclear | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
| Grid operator | Electric Reliability Council of Texas, Inc. | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
| Queue date | 30 Apr 2026 | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
| Connection date | 23 Apr 2027 (proposed) | ERCOT GIS report · ERCOT Terms of Use · checked 24 Oct 2026 |
Research on this grid connection and its holder.Who holds it up to the parent company, the project behind it and its connection date, and an introduction to the holder.
Request researchHow it compares
STP Unit2 High Pressure Turbine Upgrade grid connection (ERCOT 27INR0557) is the 11th-largest of 1,710 grid connections in Texas and the 45th-largest of 4,021 in the United States by capacity; its 1,337 MW is 0.14% of the 923,876 MW we hold for the United States. Ranks and totals cover the grid connections in our data that report their capacity, not every one in existence.
| Within | Rank | Total | Share |
|---|---|---|---|
| Texas | 11th of 1,710 | 438,874 MW | 0.3% |
| United States | 45th of 4,021 | 923,876 MW | 0.14% |
| All grid connections in our data | 113th of 7,928 | 1,372,494 MW | <0.1% |
Timeline
Dated facts about this grid connection from its sources, oldest first.
- Entered the connection queue
- Due to connect
Holder, grid operator and place
Other grid connections in Texas
- Brazos Energy Security grid connection (ERCOT 28INR0456)3,000 MW
- BM Great Rock Energy Center grid connection (ERCOT 30INR0091)1,981 MW
- Prairie Ridge (Gas - CC) grid connection (ERCOT 30INR0071)1,660 MW
- Hecate Energy Orem Wind grid connection (ERCOT 27INR0061)1,542 MW
- Aegle Power grid connection (ERCOT 27INR0084)1,536 MW
- Big Canyon Wind grid connection (ERCOT 30INR0018)1,500 MW
- Caldwell County Energy Center grid connection (ERCOT 30INR0031)1,500 MW
- Bullock Gas grid connection (ERCOT 33INR0005)1,400 MW
Data on this page
- California ISO. The terms cover every document on caiso.com, the cluster reports included. CAISO queue report, CAISO Privacy and Terms of Use.
- SP Electricity North West, via Northern Powergrid Open Data. SP Electricity North West open data portal, CC BY 4.0.
- ERCOT GIS report. ERCOT GIS report, ERCOT Terms of Use.
- Supported by National Energy SO Open Data. NESO TEC Register, NESO Open Data Licence v1.0.
- Supported by Northern Powergrid Open Data. Northern Powergrid open data portal, Northern Powergrid Open Data Licence v1.0.
- NYISO interconnection queue. NYISO interconnection queue, Free reuse.
- PJM New Services Queue. PJM New Services Queue, Free reuse.
- SP Energy Networks, via Northern Powergrid Open Data. SP Energy Networks open data portal, CC BY 4.0.
- SSEN Distribution. SSEN Distribution data portal, CC BY 4.0.