Cogeneration 1
Pima County, Arizona · EIA plant ID 56229 · Operator: University of Arizona
Nameplate9MWSummer 8 MW
Generators1in service
Net generation53GWh12 mo to Aug 2026
Capacity factor72%gas/coal/oil units, summer MW
Heat rate4,510Btu/kWhfossil units, electric fuel, HHV
First online2002Runs 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) |
|---|---|---|---|
| 2004 | 51 | 70.0% | 10,050 |
| 2005 | 54 | 74.3% | 5,860 |
| 2006 | 54.3 | 74.7% | 10,050 |
| 2007 | 54.1 | 74.4% | 10,050 |
| 2008 | 54 | 74.1% | 10,050 |
| 2009 | 55.5 | 76.3% | 10,050 |
| 2010 | 56.3 | 77.4% | 10,050 |
| 2011 | 49.6 | 68.2% | 10,050 |
| 2012 | 58 | 79.5% | 9,749 |
| 2013 | 57.5 | 79.1% | 9,749 |
| 2014 | 47.7 | 65.6% | 10,050 |
| 2015 | 51.2 | 70.4% | 8,621 |
| 2016 | 54.3 | 74.5% | 4,510 |
| 2017 | 55.3 | 76.0% | 4,510 |
| 2018 | 56.1 | 77.1% | 4,510 |
| 2019 | 55.9 | 76.9% | 4,510 |
| 2020 | 56.4 | 77.4% | 4,510 |
| 2021 | 50.7 | 69.8% | 4,510 |
| 2022 | 53.6 | 73.8% | 4,510 |
| 2023 | 54.1 | 74.5% | 4,510 |
| 2024 | 54.5 | 74.7% | 4,510 |
| 2025 | 48.3 | 66.4% | 4,510 |
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 |
|---|---|---|---|---|---|---|---|---|
| CT1 | Natural Gas Fired Combined Cycle | CS | 9 | 8.3 | Nov 2002 | Operating | — | coming soon |
Owner / operator
Operator: University of Arizona. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| University of Arizona | 100.0% | 9 MW |
Nearby plants
Within 80 km.
| Cogeneration 2 | 6 MW | 1.3 km |
| Pima Energy Storage System | 10 MW | 4.4 km |
| Demoss Petrie | 85 MW | 4.5 km |
| Amphitheater High School Solar | 1 MW | 4.8 km |
| Davis Monthan AFB (AZ) West Airfield | 13 MW | 8 km |
| H Wilson Sundt Generating Station | 529 MW | 9 km |