Valencia
Santa Cruz County, Arizona · EIA plant ID 6515 · Operator: UNS Electric, Inc
Nameplate108MWSummer 56 MW
Generators4in service
Net generation7GWh12 mo to Dec 2025
Capacity factor1%gas/coal/oil units, summer MW
Heat rate12,379Btu/kWhfossil units, electric fuel, HHV
First online1989Runs as rarely runs
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) |
|---|---|---|---|
| 2002 | 1.5 | 0.4% | 26,975 |
| 2003 | 1.8 | 0.4% | — |
| 2004 | 1.2 | 0.3% | 22,622 |
| 2005 | 1.5 | 0.4% | 19,476 |
| 2006 | 0.6 | 0.1% | — |
| 2007 | 3.2 | 0.6% | 24,601 |
| 2008 | 15.9 | 3.0% | 11,268 |
| 2009 | 19.9 | 3.7% | 13,809 |
| 2010 | 22.9 | 4.3% | 14,955 |
| 2011 | 19.1 | 3.6% | 13,167 |
| 2012 | 18.8 | 3.5% | 15,773 |
| 2013 | 22.8 | 4.3% | 13,173 |
| 2014 | 0.5 | 0.1% | 19,834 |
| 2015 | 0 | 0.0% | — |
| 2016 | 0.6 | 0.1% | 16,124 |
| 2017 | 3 | 0.6% | 18,715 |
| 2018 | 3 | 0.6% | 12,625 |
| 2019 | 27.4 | 5.2% | 11,429 |
| 2020 | 8.2 | 1.6% | 10,798 |
| 2021 | 3.7 | 0.7% | 12,972 |
| 2022 | 3.4 | 0.6% | 15,182 |
| 2023 | 5.7 | 1.1% | 14,640 |
| 2024 | 4.8 | 0.9% | 14,179 |
| 2025 | 6.8 | 1.4% | 12,379 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo13,094 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas55
Net summer MW on oil58
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 |
|---|---|---|---|---|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | GT | 18 | 12 | Aug 1989 | Operating (Standby / backup) | — | coming soon |
| GT2 | Natural Gas Fired Combustion Turbine | GT | 18 | 12 | Aug 1989 | Operating (Standby / backup) | — | coming soon |
| GT3 | Natural Gas Fired Combustion Turbine | GT | 18 | 12 | Aug 1989 | Operating (Standby / backup) | — | coming soon |
| GT4 | Natural Gas Fired Combustion Turbine | GT | 54 | 19.8 | Jun 2006 | Operating | — | coming soon |
Owner / operator
Operator: UNS Electric, Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| UNS Electric, Inc | 100.0% | 108 MW |
Nearby plants
Within 80 km.
| Rio Rico Solar | 6 MW | 16.8 km |
| Wilmot Energy Center II | 200 MW | 48.1 km |
| Babacomari Solar | 160 MW | 58.9 km |
| Fort Huachuca Solar PV Project | 18 MW | 59.1 km |
| Avalon Solar II | 16 MW | 70.9 km |
| Avalon Solar | 29 MW | 71 km |