85 MW Natural Gas operating in Pima, AZ — Tucson Electric Power Company
85 MW
Nameplate Capacity
1
Generators
unit
Natural Gas Fired Combustion Turbine
Technology
2001
Operating Since
Coordinates
32.2522, -110.9921
County
Pima, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tucson Electric Power Co | Tucson Electric Power | — |
| Owner(s) | Tucson Electric Power Co | Fortis | — |
| Status | Operating | — | — |
Demoss Petrie is an 85 MW natural gas-fired power plant located in Pima County, Arizona. The plant began operating in 2001 and has one generator utilizing natural gas-fired combustion turbine technology. It is owned by Fortis, a Canadian company, and operated by Tucson Electric Power Co. The plant's balancing authority is Tucson Electric Power Company, and it falls within the WECC NERC region. Demoss Petrie ranks as the 27th largest power plant out of 31 in Arizona, and 987th out of 1963 nationally.
In the latest year with available data, Demoss Petrie generated 2,469 MWh of electricity, resulting in a capacity factor of 0.3%. Financial data indicates an installed cost of $398.97 per kW, according to FERC filings.
Generated from EIA, GEM, and public data sources
NERC Region
WECC
Balancing Authority
Tucson Electric Power Company
Grid Voltage
138 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
208 MWh
Latest Month
2.5K MWh
Annual Generation
0.3%
Capacity Factor
$416/kW
Installed Cost
$104.7/MWh
Operating Cost
Tucson Electric Power Company
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
Last updated 2026-03-26
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