Saguaro
Pinal County, Arizona · EIA plant ID 118 · Operator: Arizona Public Service Co
Nameplate185MWSummer 169 MW
Generators3in service
Net generation118GWh12 mo to Dec 2025
Capacity factor8%gas/coal/oil units, summer MW
Heat rate11,608Btu/kWhfossil units, electric fuel, HHV
First online1972Runs as peaking
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 881.8 | — | — |
| 2002 | 204.1 | — | — |
| 2004 | 69.2 | 2.2% | 13,778 |
| 2005 | 50.3 | 1.5% | 13,723 |
| 2006 | 61 | 1.8% | 12,956 |
| 2007 | 116.3 | 3.4% | 13,110 |
| 2008 | 77.1 | 2.3% | 14,004 |
| 2009 | 91.3 | 2.7% | 13,515 |
| 2010 | 8.7 | 0.3% | 15,545 |
| 2011 | 9.7 | 0.3% | 13,514 |
| 2012 | 16.7 | 0.5% | 14,258 |
| 2013 | 17.8 | 0.7% | 15,234 |
| 2014 | 11 | 0.7% | 17,401 |
| 2015 | 18.1 | 1.2% | 15,690 |
| 2016 | 15.7 | 1.0% | 19,086 |
| 2017 | 44.2 | 2.9% | 16,928 |
| 2018 | 109.4 | 7.1% | 13,464 |
| 2019 | 118.6 | 7.7% | 12,917 |
| 2020 | 107.9 | 7.0% | 14,174 |
| 2021 | 84.8 | 5.5% | 12,610 |
| 2022 | 83.3 | 5.4% | 12,600 |
| 2023 | 175.6 | 11.2% | 13,723 |
| 2024 | 135.2 | 9.1% | 10,413 |
| 2025 | 117.5 | 7.9% | 11,608 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| GE1 | Natural Gas Fired Combustion Turbine | GT | 78.3 | 69 | Jul 2002 | Operating | — | coming soon |
| GT1 | Natural Gas Fired Combustion Turbine | GT | 53.1 | 50 | May 1972 | Operating | — | coming soon |
| GT2 | Natural Gas Fired Combustion Turbine | GT | 53.1 | 50 | Jul 1973 | Operating | — | coming soon |
| 1 | Natural Gas Steam Turbine | ST | 125 | 110 | Jul 1954 | Retired Jul 2013 | — | coming soon |
| 2 | Natural Gas Steam Turbine | ST | 125 | 100 | Jun 1955 | Retired Jul 2013 | — | coming soon |
| PV1 | Solar Thermal without Energy Storage | OT | 1 | 1 | Dec 2005 | Retired Apr 2013 | — | coming soon |
Owner / operator
Operator: Arizona Public Service Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Arizona Public Service Co | 100.0% | 185 MW |
Nearby plants
Within 80 km.
| Red Rock | 85 MW | 1 km |
| Serrano | 384 MW | 5.5 km |
| Avra Valley Solar | 25 MW | 20.1 km |
| Picture Rocks Solar, LLC | 20 MW | 20.9 km |
| North Loop | 108 MW | 23.4 km |
| Kitt Solar | — | 32.3 km |