67th largest plant in Arizona · 2744th nationally
Demoss Petrie is a natural gas power plant in Arizona with a nameplate capacity of 85.0 MW. It generates roughly 1.3k MWh per year — enough to power about 124 average U.S. homes.
Its capacity factor of 0% reflects intermittent or peaking operation. At 1679 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
| Plant Name | Demoss Petrie |
|---|---|
| Operator | Tucson Electric Power Co |
| City | Tucson |
| County | Pima County |
| State | Arizona |
| ZIP | 85705 |
| Coordinates | 32.25227, -110.99215 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GT2 | Natural Gas Fired Combustion Turbine | Natural Gas | 85.0 MW | Operating | 2001 |
| CO₂ | 1.1k metric tons |
|---|---|
| CO₂ Rate | 1679 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 | Tucson Electric 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.