10th largest plant in Arkansas · 620th nationally
Harry L. Oswald is a natural gas power plant in Arkansas with a nameplate capacity of 600 MW. It generates roughly 941.0k MWh per year — enough to power about 89,620 average U.S. homes.
Its capacity factor of 18% reflects intermittent or peaking operation. At 907 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (600 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 | Harry L. Oswald |
|---|---|
| Operator | Arkansas Electric Coop Corp |
| City | Little Rock |
| County | Pulaski County |
| State | Arkansas |
| ZIP | 72206 |
| Coordinates | 34.59230, -92.21660 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| G8 | Natural Gas Fired Combined Cycle | Natural Gas | 105 MW | Operating | 2002 |
| G9 | Natural Gas Fired Combined Cycle | Natural Gas | 105 MW | Operating | 2002 |
| G7 | Natural Gas Fired Combined Cycle | Natural Gas | 83.5 MW | Operating | 2002 |
| G1 | Natural Gas Fired Combined Cycle | Natural Gas | 51.0 MW | Operating | 2002 |
| G2 | Natural Gas Fired Combined Cycle | Natural Gas | 51.0 MW | Operating | 2002 |
| G3 | Natural Gas Fired Combined Cycle | Natural Gas | 51.0 MW | Operating | 2002 |
| G4 | Natural Gas Fired Combined Cycle | Natural Gas | 51.0 MW | Operating | 2002 |
| G5 | Natural Gas Fired Combined Cycle | Natural Gas | 51.0 MW | Operating | 2002 |
| G6 | Natural Gas Fired Combined Cycle | Natural Gas | 51.0 MW | Operating | 2002 |
| CO₂ | 427.0k metric tons |
|---|---|
| SO₂ | 2 metric tons |
| NOₓ | 333 metric tons |
| CO₂ Rate | 907 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 | SERC |
|---|---|
| Balancing Authority | Midcontinent Independent Transmission System Operator, 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.