Power Station 4
Galveston County, Texas · EIA plant ID 52132 · Operator: South Houston Green Power LLC
Nameplate191MWSummer 172 MW
Generators3in service
Net generation517GWh12 mo to Dec 2025
Capacity factor34%gas/coal/oil units, summer MW
Heat rate5,859Btu/kWhfossil units, electric fuel, HHV
First online1986Runs as intermediate
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 1,064 | — | — |
| 2002 | 1,340.7 | — | — |
| 2003 | 1,121 | 74.4% | 5,759 |
| 2004 | 755.5 | 50.0% | 4,837 |
| 2005 | 463.8 | 30.8% | 4,837 |
| 2006 | 502.6 | 33.4% | 4,837 |
| 2007 | 214 | 14.2% | 4,837 |
| 2008 | 319.8 | 21.2% | 4,837 |
| 2009 | 237.8 | 15.8% | 4,837 |
| 2010 | 934.8 | 62.0% | 4,822 |
| 2011 | 660.8 | 43.9% | 4,975 |
| 2012 | 512.8 | 33.9% | 5,045 |
| 2013 | 366.1 | 24.3% | 4,938 |
| 2014 | 205.8 | 13.7% | 5,255 |
| 2015 | 294.4 | 19.5% | 4,692 |
| 2016 | 12.1 | 0.8% | 13,709 |
| 2017 | 251.1 | 16.7% | 5,902 |
| 2018 | 672.2 | 44.6% | 5,832 |
| 2019 | 626.7 | 41.6% | 5,838 |
| 2020 | 350 | 23.2% | 5,839 |
| 2021 | 298.5 | 19.8% | 5,874 |
| 2022 | 580.5 | 38.5% | 5,804 |
| 2023 | 629.1 | 41.8% | 5,781 |
| 2024 | 401.4 | 26.6% | 5,911 |
| 2025 | 516.8 | 34.3% | 5,859 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combined Cycle | CT | 78.2 | 69 | Sep 1986 | Operating | — | coming soon |
| GEN2 | Natural Gas Fired Combined Cycle | CT | 78.2 | 69 | Sep 1986 | Operating | — | coming soon |
| GEN3 | Natural Gas Fired Combined Cycle | CA | 34.7 | 34 | Sep 1986 | Operating (Out of service) | — | coming soon |
Owner / operator
Operator: South Houston Green Power LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Marathon Petroleum Company LP | 100.0% | 191 MW |
Nearby plants
Within 80 km.
| Green Power 2 | 861 MW | 1 km |
| Texas City Power Plant | 450 MW | 2.1 km |
| Air Products Texas City | 65 MW | 2.2 km |
| Texas City Plant Union Carbide | 26 MW | 2.4 km |
| Zeya | — | 2.8 km |
| Heights | 10 MW | 3 km |