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184.5 MW Natural Gas operating in Pinal, AZ
184.5 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1972
Operating Since
Coordinates
32.5517, -111.3000
County
Pinal, AZ
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arizona Public Service Co | Arizona Public Service | — |
| Owner(s) | Arizona Public Service Co | Pinnacle West Capital | — |
| Status | Operating | — | — |
The Saguaro power plant is a natural gas-fired facility located in Pinal County, Arizona. It has a total capacity of 184.5 MW across three natural gas-fired combustion turbine generators. The plant began operating in 1972 and is owned by Pinnacle West Capital and operated by Arizona Public Service Company (APS). Saguaro 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, Saguaro generated 135,229 MWh of electricity, resulting in a capacity factor of 8.3%. The plant ranks as the 23rd largest in Arizona out of 26 plants, and 767th 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
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
9.8K MWh
Latest Month
135.2K MWh
Annual Generation
8.3%
Capacity Factor
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CO₂ Intensity
1089 lb/MWh
NOx
0.278 lb/MWh
SO₂
0.005 lb/MWh
CH₄
0.030 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
10.9%
Annual Net Gen
176 GWh
CO₂eq
1091 lb/MWh
Subregion
WECC Southwest
2013
$965/kW
Est. Construction Cost
Total estimated cost: $178.1M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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