Tesoro SLC Cogeneration Plant
Salt Lake County, Utah · EIA plant ID 56509 · Operator: Tesoro Refng Marketing Co Mntn Region
Nameplate30MWSummer 23 MW
Generators2in service
Net generation201GWh12 mo to Aug 2026
Capacity factor100%gas/coal/oil units, summer MW
Heat rate11,190Btu/kWhfossil units, electric fuel, HHV
First online2004Runs 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) |
|---|---|---|---|
| 2006 | 175.2 | 90.9% | 6,598 |
| 2007 | 41 | 21.3% | 25,244 |
| 2008 | 180.6 | 93.5% | 6,529 |
| 2009 | 192.8 | 100.1% | 6,551 |
| 2010 | 183.9 | 95.4% | 6,551 |
| 2011 | 173.5 | 90.0% | 6,571 |
| 2012 | 158.7 | 82.1% | 6,555 |
| 2013 | 156.4 | 81.2% | 6,539 |
| 2014 | 180.1 | 93.5% | 6,497 |
| 2015 | 177 | 91.9% | 6,466 |
| 2016 | 194.2 | 100.5% | 11,605 |
| 2017 | 195 | 101.2% | 11,194 |
| 2018 | 182.2 | 94.5% | 11,217 |
| 2019 | 194.8 | 101.1% | 11,401 |
| 2020 | 186.7 | 92.4% | 11,246 |
| 2021 | 197.4 | 98.0% | 11,295 |
| 2022 | 202.6 | 100.6% | 11,232 |
| 2023 | 139.3 | 69.1% | 10,743 |
| 2024 | 185.1 | 91.6% | 11,260 |
| 2025 | 198.7 | 98.6% | 11,168 |
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 | 15.2 | 11.5 | Jul 2004 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 15.2 | 11.5 | Jul 2004 | Operating | — | coming soon |
Owner / operator
Operator: Tesoro Refng Marketing Co Mntn Region. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Marathon Petroleum Company LP | 100.0% | 30 MW |
Nearby plants
Within 80 km.
| Salt Palace Solar Gen Plant | 1 MW | 3 km |
| Gadsby | 433 MW | 3.4 km |
| HTW Plant 303 COGEN | 7 MW | 6.2 km |
| Dominguez Energy Storage | 200 MW | 9.2 km |
| Bountiful City | 30 MW | 10.5 km |
| Salt Lake Energy Systems | 3 MW | 12.1 km |