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422.4 MW Natural Gas Fired Combustion Turbine (238 MW) + Natural Gas Steam Turbine (87 MW) + Petroleum Liquids (98 MW) operating in Yuma, AZ — Arizona Public Service Company
422.4 MW
Nameplate Capacity
8
Generators
units
Hybrid (3)
Technology
Natural Gas Fired Combustion Turbine + Natural Gas Steam Turbine + Petroleum Liquids
1959
Operating Since
Coordinates
32.7214, -114.7106
County
Yuma, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arizona Public Service Co | Arizona Public Service | — |
| Owner(s) | Arizona Public Service Co, Imperial Irrigation District | Pinnacle West Capital | — |
| Status | Operating | — | — |
The Yucca power plant is located in Yuma County, Arizona. It has a total capacity of 422.4 MW across 8 generators and is operated by Arizona Public Service Co, a subsidiary of Pinnacle West Capital. The plant began operating in 1959 and utilizes a combination of natural gas-fired combustion turbine and steam turbine technologies, as well as petroleum liquids. Yucca is considered a hybrid plant due to its multiple fuel and technology types.
Yucca operates within the Arizona Public Service Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In the most recent year with available data, the plant generated 200,127 MWh, resulting in a capacity factor of 5.4%. Yucca ranks as the 22nd largest power plant in Arizona out of 26, and 532nd nationally out of 945 plants.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Arizona Public Service Company (AZPS)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
13.4K MWh
Latest Month
200.1K MWh
Annual Generation
5.4%
Capacity Factor
CO₂ Intensity
842 lb/MWh
NOx
0.080 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.026 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
6.5%
Annual Net Gen
237 GWh
CO₂eq
843 lb/MWh
Subregion
WECC Southwest
2013
$965/kW
Est. Construction Cost
Total estimated cost: $407.7M
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
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