Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/6251
EIA plant 6251
Wadsworth · Matagorda · TX
South Texas Project
Operated by STP Nuclear Operating Co
Published location
Where is South Texas Project?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
28.795000, -96.048100
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Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the TX plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
11,634,136
21,833,846
31,517,587
4913,191
51,292,316
61,802,590
71,651,534
81,855,827
91,856,921
101,073,194
111,511,616
121,983,705
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 1,634,136 |
| 2 | 1,833,846 |
| 3 | 1,517,587 |
| 4 | 913,191 |
| 5 | 1,292,316 |
| 6 | 1,802,590 |
| 7 | 1,651,534 |
| 8 | 1,855,827 |
| 9 | 1,856,921 |
| 10 | 1,073,194 |
| 11 | 1,511,616 |
| 12 | 1,983,705 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 1,634,136 MWh |
| 2 | 1,833,846 MWh |
| 3 | 1,517,587 MWh |
| 4 | 913,191 MWh |
| 5 | 1,292,316 MWh |
| 6 | 1,802,590 MWh |
| 7 | 1,651,534 MWh |
| 8 | 1,855,827 MWh |
| 9 | 1,856,921 MWh |
| 10 | 1,073,194 MWh |
| 11 | 1,511,616 MWh |
| 12 | 1,983,705 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 1 | Nuclear | NUC | 1,354.3 | OP |
| 2 | Nuclear | NUC | 1,354.3 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
6251
Sector
IPP Non-CHP
Water source
Colorado River
Data edition
2024-final
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right South Texas Project power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at South Texas Project
Variation in the published months
Across 12 numeric monthly generation entries, 12 has the highest recorded value (1,983,705 MWh) and 4 the lowest (913,191 MWh). Their difference is 1,070,514 MWh. Missing months have not been treated as zero.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| 1 | Nuclear | 1354.3 | 1300.0 | 1340.0 | 1280.0 |
| 2 | Nuclear | 1354.3 | 1280.0 | 1320.0 | 1280.0 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.