North Loop
Pima County, Arizona · EIA plant ID 6088 · Operator: Tucson Electric Power Co
Nameplate108MWSummer 95 MW
Generators4in service
Net generation1GWh12 mo to Dec 2025
Capacity factor0%gas/coal/oil units, summer MW
Heat rate26,359Btu/kWhfossil units, electric fuel, HHV
First online1972Runs 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) |
|---|---|---|---|
| 2001 | 73.1 | — | — |
| 2002 | 26.8 | — | — |
| 2003 | 7.4 | 0.9% | 16,762 |
| 2004 | 7 | 0.8% | 16,836 |
| 2005 | 7.5 | 0.9% | 16,112 |
| 2006 | 5.3 | 0.6% | 18,569 |
| 2007 | 6.5 | 0.8% | 17,650 |
| 2008 | 3.4 | 0.4% | 17,991 |
| 2009 | 0.1 | 0.0% | — |
| 2010 | 0.6 | 0.1% | 17,213 |
| 2011 | 2.3 | 0.3% | 22,217 |
| 2012 | 1.6 | 0.2% | 22,660 |
| 2013 | 4 | 0.5% | 18,609 |
| 2014 | 1.9 | 0.2% | 15,776 |
| 2015 | 0.9 | 0.1% | 22,755 |
| 2016 | 0.9 | 0.1% | — |
| 2017 | 1.4 | 0.2% | — |
| 2018 | 7.9 | 0.9% | 15,712 |
| 2019 | 12.5 | 1.5% | 15,223 |
| 2020 | 0.9 | 0.1% | 19,446 |
| 2021 | 1.7 | 0.2% | 13,885 |
| 2022 | 21.8 | 2.6% | 15,043 |
| 2023 | 3.6 | 0.4% | 21,769 |
| 2024 | 2.5 | 0.3% | 20,300 |
| 2025 | 1 | 0.1% | 26,359 |
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 mo444 MMBtu
Last month with liquid burnDec 2023
Switch while operatingYes
Net summer MW on gas75
Net summer MW on oil75
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | GT | 27 | 25 | Dec 1972 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 27 | 25 | Dec 1972 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 27 | 25 | Dec 1972 | Operating | — | coming soon |
| 4 | Natural Gas Fired Combustion Turbine | GT | 26.8 | 20 | Jul 2001 | Operating | — | coming soon |
| 5 | Natural Gas Fired Combustion Turbine | GT | 26.8 | 19 | Jul 2001 | not_current | — | coming soon |
Owner / operator
Operator: Tucson Electric Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tucson Electric Power Co | 100.0% | 108 MW |
Nearby plants
Within 80 km.
| Pima Community College NW | 1 MW | 11.2 km |
| Picture Rocks Solar, LLC | 20 MW | 11.5 km |
| Canyon Del Oro High School Solar | 2 MW | 14.6 km |
| Avra Valley Solar | 25 MW | 15.1 km |
| Roger Road WWTP | 1 MW | 15.2 km |
| Serrano | 384 MW | 20.1 km |