3rd largest plant in Idaho · 981st nationally
Langley Gulch Power Plant is a natural gas power plant in Idaho with a nameplate capacity of 319 MW. It generates roughly 1.6M MWh per year — enough to power about 155,098 average U.S. homes.
Its capacity factor of 58% puts it in the middle range — running steadily but not full-time. At 821 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 (319 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 | Langley Gulch Power Plant |
|---|---|
| Operator | Idaho Power Co |
| City | New Plymouth |
| County | Payette County |
| State | Idaho |
| ZIP | 83655 |
| Coordinates | 43.90444, -116.81972 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GTG | Natural Gas Fired Combined Cycle | Natural Gas | 187 MW | Operating | 2012 |
| STG | Natural Gas Fired Combined Cycle | Natural Gas | 132 MW | Operating | 2012 |
| CO₂ | 668.9k metric tons |
|---|---|
| SO₂ | 3 metric tons |
| NOₓ | 35 metric tons |
| CO₂ Rate | 821 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 | WECC |
|---|---|
| Balancing Authority | Idaho Power Company |
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.