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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
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
208 MWh
Latest Month
2.5K MWh
Annual Generation
0.3%
Capacity Factor
CO₂ Intensity
1679 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
0.736 lb/MWh
SO₂
Gas turbine · Tucson Electric Power Company · Data from 2015–2024
$416/kW
Installed Cost
$2/kW
Annual CapEx
$104.7/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about Demoss PetrieTucson Electric Power Company (TEPC)
Grid Voltage
138.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
0.047 lb/MWh
CH₄
0.031 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
0.2%
Annual Net Gen
1 GWh
CO₂eq
1680 lb/MWh
Subregion
WECC Southwest