322nd largest plant in Texas · 1630th nationally
Power Station 4 is a natural gas power plant in Texas with a nameplate capacity of 191 MW. It generates roughly 629.1k MWh per year — enough to power about 59,911 average U.S. homes.
Its capacity factor of 38% reflects intermittent or peaking operation. At 670 lb CO₂/MWh, its emission rate sits below the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (191 MW nameplate × hours in the month). Filled bars are actual net generation reported to EIA Form 923. The gap between them is capacity factor made visible.
| Plant Name | Power Station 4 |
|---|---|
| Operator | South Houston Green Power Llc |
| City | Texas City |
| County | Galveston County |
| State | Texas |
| ZIP | 77590 |
| Coordinates | 29.37816, -94.92195 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combined Cycle | Natural Gas | 78.2 MW | Operating | 1986 |
| GEN2 | Natural Gas Fired Combined Cycle | Natural Gas | 78.2 MW | Operating | 1986 |
| GEN3 | Natural Gas Fired Combined Cycle | Natural Gas | 34.7 MW | Out of Service | 1986 |
| Owner | Location | Share |
|---|---|---|
| Marathon Petroleum Company Lp | Findlay, OH | 10000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| CO₂ | 210.7k metric tons |
|---|---|
| SO₂ | 2 metric tons |
| NOₓ | 502 metric tons |
| CO₂ Rate | 670 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
| NERC Region | TRE |
|---|---|
| Balancing Authority | Electric Reliability Council Of Texas, Inc. |
Natural gas plants are the workhorse of the modern grid. Combined-cycle units achieve very high efficiency and can ramp up and down quickly to balance variable renewables. They emit roughly half the CO₂ per MWh of coal and far less of other pollutants, but they still release upstream methane during fuel extraction.