Millcreek Power Generation
Washington County, Utah · EIA plant ID 56253 · Operator: City of St George
Nameplate80MWSummer 74 MW
Generators2in service
Net generation145GWh12 mo to Dec 2025
Capacity factor22%gas/coal/oil units, summer MW
Heat rate10,495Btu/kWhfossil units, electric fuel, HHV
First online2006Runs as intermediate
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 | 46.6 | 19.2% | 10,361 |
| 2007 | 43 | 13.3% | 9,823 |
| 2008 | 31.8 | 9.8% | 9,965 |
| 2009 | 30.9 | 9.6% | 13,914 |
| 2010 | 66.9 | 13.1% | 8,335 |
| 2011 | 64.3 | 10.0% | 7,468 |
| 2012 | 90.6 | 14.0% | 10,581 |
| 2013 | 88.1 | 13.7% | 9,781 |
| 2014 | 77.4 | 12.0% | 9,807 |
| 2015 | 78.2 | 12.1% | 7,909 |
| 2016 | 131.6 | 20.4% | 7,885 |
| 2017 | 96.8 | 15.0% | 9,970 |
| 2018 | 111.5 | 17.3% | 8,038 |
| 2019 | 78.4 | 12.2% | 9,780 |
| 2020 | 103.1 | 16.0% | 10,125 |
| 2021 | 127.7 | 19.8% | 9,860 |
| 2022 | 152.5 | 23.7% | 10,339 |
| 2023 | 118.1 | 18.3% | 10,314 |
| 2024 | 148.9 | 23.0% | 10,375 |
| 2025 | 145 | 22.5% | 10,495 |
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 |
|---|---|---|---|---|---|---|---|---|
| MC1 | Natural Gas Fired Combustion Turbine | GT | 40 | 36.8 | Apr 2006 | Operating | — | coming soon |
| MC2 | Natural Gas Fired Combustion Turbine | GT | 40 | 36.8 | Jun 2010 | Operating | — | coming soon |
Owner / operator
Operator: City of St George. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of St George | 100.0% | 80 MW |
Nearby plants
Within 80 km.
| St George Red Rock | 14 MW | 4.6 km |
| Washington City Electric Generation | 6 MW | 8.4 km |
| Solomon Generating Facility | 15 MW | 10 km |
| Bloomington Solar I | 2 MW | 12.4 km |
| Bloomington Power Plant | 10 MW | 12.5 km |
| Quail Creek Hydro Plant #1 | 2 MW | 16.2 km |