Santan
Maricopa County, Arizona · EIA plant ID 8068 · Operator: Salt River Project
Nameplate1,326MWSummer 1,286 MW
Generators9in service
Net generation5,193GWh12 mo to Aug 2026
Capacity factor46%gas/coal/oil units, summer MW
Heat rate7,665Btu/kWhfossil units, electric fuel, HHV
First online1974Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 1,324.2 | — | — |
| 2002 | 899 | — | — |
| 2003 | 726.2 | 22.5% | 9,377 |
| 2004 | 485.2 | 15.0% | 9,460 |
| 2005 | 2,078.1 | 30.3% | 7,517 |
| 2006 | 3,095 | 29.9% | 7,615 |
| 2007 | 4,222.8 | 39.3% | 7,523 |
| 2008 | 4,554.4 | 42.3% | 7,497 |
| 2009 | 3,981.4 | 37.0% | 7,493 |
| 2010 | 1,919.1 | 17.8% | 7,833 |
| 2011 | 2,362.6 | 22.0% | 7,881 |
| 2012 | 2,983.9 | 27.7% | 7,854 |
| 2013 | 2,859.7 | 26.6% | 7,804 |
| 2014 | 2,794.2 | 26.0% | 7,719 |
| 2015 | 3,521.5 | 32.8% | 7,608 |
| 2016 | 2,985.2 | 27.7% | 7,919 |
| 2017 | 3,717.4 | 34.6% | 7,680 |
| 2018 | 3,752.5 | 34.9% | 7,748 |
| 2019 | 6,113.6 | 56.9% | 7,702 |
| 2020 | 6,014.2 | 55.8% | 7,796 |
| 2021 | 5,053.4 | 47.0% | 7,714 |
| 2022 | 3,707.1 | 34.5% | 7,932 |
| 2023 | 5,697.3 | 52.8% | 7,708 |
| 2024 | 6,017.8 | 53.3% | 7,609 |
| 2025 | 4,640.8 | 41.2% | 7,679 |
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 |
|---|---|---|---|---|---|---|---|---|
| ST1 | Natural Gas Fired Combined Cycle | CS | 103.5 | 92 | Oct 1974 | Operating | — | coming soon |
| ST2 | Natural Gas Fired Combined Cycle | CS | 103.5 | 92 | Dec 1974 | Operating | — | coming soon |
| ST3 | Natural Gas Fired Combined Cycle | CS | 103.5 | 92 | Oct 1974 | Operating | — | coming soon |
| ST4 | Natural Gas Fired Combined Cycle | CS | 103.5 | 92 | May 1975 | Operating | — | coming soon |
| ST5A | Natural Gas Fired Combined Cycle | CT | 153.8 | 163 | Apr 2005 | Operating | — | coming soon |
| ST5B | Natural Gas Fired Combined Cycle | CT | 153.8 | 163 | Apr 2005 | Operating | — | coming soon |
| ST5S | Natural Gas Fired Combined Cycle | CA | 314.5 | 290 | Apr 2005 | Operating | — | coming soon |
| ST6A | Natural Gas Fired Combined Cycle | CT | 153.8 | 171 | Mar 2006 | Operating | — | coming soon |
| ST6S | Natural Gas Fired Combined Cycle | CA | 136.1 | 131 | Mar 2006 | Operating | — | coming soon |
| 1 | — | CS | — | — | — | not_current | — | coming soon |
| 2 | — | CS | — | — | — | not_current | — | coming soon |
| 3 | — | CS | — | — | — | not_current | — | coming soon |
| 4 | — | CS | — | — | — | not_current | — | coming soon |
| ST5 | Natural Gas Fired Combined Cycle | CC | 600 | 550 | planned May 2005 | not_current | — | coming soon |
| ST6 | Natural Gas Fired Combined Cycle | CC | 300 | 275 | planned May 2006 | not_current | — | coming soon |
Owner / operator
Operator: Salt River Project. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Salt River Project | 100.0% | 1,326 MW |
Nearby plants
Within 80 km.
| Gilbert Solar Facility I, LLC | 2 MW | 5.5 km |
| Superstition Energy Storage | 90 MW | 8.1 km |
| Mesa Carport PV | 5 MW | 13.9 km |
| Pediment BESS I | 250 MW | 14 km |
| Queen Creek Solar Farm | 19 MW | 14.7 km |
| South Consolidated | 1 MW | 15.2 km |