169th largest plant in Oregon · 7981st nationally
Threemile Digester is a natural gas power plant in Oregon with a nameplate capacity of 4.8 MW. It generates roughly 37.6k MWh per year — enough to power about 3,581 average U.S. homes.
Its capacity factor of 89% means it runs nearly around-the-clock as baseload generation. At 628 lb CO₂/MWh, its emission rate sits below the national grid average of roughly 800 lb/MWh.
| Plant Name | Threemile Digester |
|---|---|
| Operator | Tmf-Rig, Llc |
| City | Boardman |
| County | Morrow County |
| State | Oregon |
| ZIP | 97818 |
| Coordinates | 45.71000, -119.90111 |
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 Internal Combustion Engine | Natural Gas | 1.6 MW | Operating | 2012 |
| GEN2 | Natural Gas Internal Combustion Engine | Natural Gas | 1.6 MW | Operating | 2012 |
| GEN3 | Natural Gas Internal Combustion Engine | Natural Gas | 1.6 MW | Operating | 2012 |
| CO₂ | 11.8k metric tons |
|---|---|
| NOₓ | 268 metric tons |
| CO₂ Rate | 628 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 | Pacificorp - West |
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.