70th largest plant in Wyoming · 10231st nationally
Old Faithful is a oil power plant in Wyoming with a nameplate capacity of 2.0 MW. It generates roughly 249 MWh per year — enough to power about 23 average U.S. homes.
Its capacity factor of 1% reflects intermittent or peaking operation. At 1824 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
| Plant Name | Old Faithful |
|---|---|
| Operator | Northwestern Energy (Mt Wind/Thermal) |
| City | Yellowstone |
| County | Teton County |
| State | Wyoming |
| ZIP | 82190 |
| Coordinates | 44.45330, -110.83470 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Petroleum Liquids | Distillate Oil | 1.0 MW | Standby | 1979 |
| 2 | Petroleum Liquids | Distillate Oil | 1.0 MW | Standby | 1979 |
| CO₂ | 227 metric tons |
|---|---|
| NOₓ | 4 metric tons |
| CO₂ Rate | 1824 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 | Northwestern Energy (Nwmt) |
Oil-fired plants typically run only during peak demand or grid emergencies because oil is expensive compared to gas and coal. They have the highest CO₂ emissions per MWh of any common generation technology.