Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/55144
EIA plant 55144
San Marcos · Hays · TX
Hays Energy Project
Operated by Hays Energy, LLC
Published location
Where is Hays Energy 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.
29.780600, -97.989400
Open the interactive map ↗Map data © OpenStreetMap contributors
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.
1423,424
2153,635
3452,650
4365,113
5441,148
6555,244
7591,515
8640,423
9560,675
10512,831
11430,507
12290,000
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 | 423,424 |
| 2 | 153,635 |
| 3 | 452,650 |
| 4 | 365,113 |
| 5 | 441,148 |
| 6 | 555,244 |
| 7 | 591,515 |
| 8 | 640,423 |
| 9 | 560,675 |
| 10 | 512,831 |
| 11 | 430,507 |
| 12 | 290,000 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 423,424 MWh |
| 2 | 153,635 MWh |
| 3 | 452,650 MWh |
| 4 | 365,113 MWh |
| 5 | 441,148 MWh |
| 6 | 555,244 MWh |
| 7 | 591,515 MWh |
| 8 | 640,423 MWh |
| 9 | 560,675 MWh |
| 10 | 512,831 MWh |
| 11 | 430,507 MWh |
| 12 | 290,000 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| U3 | Natural Gas Fired Combined Cycle | NG | 252.8 | OP |
| U4 | Natural Gas Fired Combined Cycle | NG | 252.8 | OP |
| U1 | Natural Gas Fired Combined Cycle | NG | 241.7 | OP |
| U2 | Natural Gas Fired Combined Cycle | NG | 241.7 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
55144
Sector
IPP Non-CHP
Water source
GBRA/City of San Marcos
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 Hays Energy 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 Hays Energy Project
Variation in the published months
Across 12 numeric monthly generation entries, 8 has the highest recorded value (640,423 MWh) and 2 the lowest (153,635 MWh). Their difference is 486,788 MWh. Missing months have not been treated as zero.
Reading the MW column
In the 4 numeric rows displayed in this table, MW ranges from 241.7 (U1, U2) to 252.8 (U3, U4). The difference is 11.1 in the column's stated units. This summary covers the displayed rows and retains the table's period and scope.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| U1 | Natural Gas Fired Combined Cycle | 241.7 | 228.0 | 257.0 | 150.0 |
| U2 | Natural Gas Fired Combined Cycle | 241.7 | 229.0 | 258.0 | 150.0 |
| U3 | Natural Gas Fired Combined Cycle | 252.8 | 228.0 | 260.0 | 120.0 |
| U4 | Natural Gas Fired Combined Cycle | 252.8 | 231.0 | 261.0 | 120.0 |
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.