Sunnyside Cogen Associates
Carbon County, Utah · EIA plant ID 50951 · Operator: Sunnyside Cogeneration Assoc
Nameplate58MWSummer 51 MW
Generators1in service
Net generation0GWh12 mo to Aug 2026
Capacity factor0%gas/coal/oil units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1993Runs 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 | 387.4 | 86.7% | 14,256 |
| 2002 | 391 | 87.5% | 14,061 |
| 2003 | 400.9 | 89.7% | 12,768 |
| 2004 | 395.3 | 88.2% | 7,210 |
| 2005 | 416.6 | 93.3% | 12,386 |
| 2006 | 418.6 | 93.7% | 13,761 |
| 2007 | 404.2 | 90.5% | 12,263 |
| 2008 | 414.2 | 92.5% | 12,313 |
| 2009 | 410.9 | 92.0% | 12,794 |
| 2010 | 377.7 | 84.5% | 12,462 |
| 2011 | 419.2 | 93.8% | 12,312 |
| 2012 | 418.2 | 93.4% | 12,174 |
| 2013 | 413.9 | 92.7% | 12,636 |
| 2014 | 419.6 | 93.9% | 12,614 |
| 2015 | 418.2 | 93.6% | 12,364 |
| 2016 | 401 | 89.5% | 12,119 |
| 2017 | 414.4 | 92.8% | 12,230 |
| 2018 | 412.9 | 92.4% | 12,083 |
| 2019 | 401 | 89.8% | 12,177 |
| 2020 | 322.1 | 71.9% | 12,331 |
| 2021 | 400.9 | 89.7% | 12,107 |
| 2022 | 404.8 | 90.6% | 12,332 |
| 2023 | 316.5 | 70.8% | 12,047 |
| 2024 | 334.7 | 74.7% | 13,306 |
| 2025 | 225.8 | 50.5% | 12,906 |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Steam Coal | ST | 58.1 | 51 | Feb 1993 | Operating | — | coming soon |
Owner / operator
Operator: Sunnyside Cogeneration Assoc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Sunnyside Cogeneration Assoc | 100.0% | 58 MW |
Nearby plants
Within 80 km.
| Graphite Solar I | 80 MW | 27.5 km |
| Castle Solar, LLC | 40 MW | 56.6 km |
| Huntington | 1,016 MW | 61.8 km |
| Hornshadow Solar, LLC | 100 MW | 64.6 km |
| Hornshadow Solar II, LLC | 200 MW | 64.6 km |
| Hunter | 1,472 MW | 68.7 km |