Chehalis Generating FacilityRetirement planned
Lewis County, Washington · EIA plant ID 55662 · Operator: PacifiCorp
Nameplate593MWSummer 477 MW
Generators3in service
Net generation2,511GWh12 mo to Aug 2026
Capacity factor60%gas/coal/oil units, summer MW
Heat rate7,495Btu/kWhfossil units, electric fuel, HHV
First online2003Runs 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) |
|---|---|---|---|
| 2003 | 524.3 | 28.8% | 7,117 |
| 2004 | 2,548.1 | 58.6% | 7,050 |
| 2005 | 2,240.9 | 51.7% | 6,753 |
| 2006 | 1,316 | 30.3% | 7,429 |
| 2007 | 1,887.5 | 43.5% | 7,147 |
| 2008 | 2,090.1 | 48.1% | 7,460 |
| 2009 | 1,747.3 | 39.2% | 7,429 |
| 2010 | 1,288.2 | 28.9% | 7,513 |
| 2011 | 665 | 14.9% | 7,695 |
| 2012 | 849.4 | 20.3% | 7,825 |
| 2013 | 1,674.2 | 40.1% | 7,414 |
| 2014 | 2,543.8 | 60.9% | 7,721 |
| 2015 | 1,093 | 26.2% | 7,680 |
| 2016 | 1,420 | 33.9% | 7,719 |
| 2017 | 1,758.9 | 42.1% | 7,615 |
| 2018 | 1,742 | 41.7% | 7,430 |
| 2019 | 2,431.5 | 58.2% | 7,381 |
| 2020 | 2,407.3 | 57.5% | 7,438 |
| 2021 | 2,248.2 | 53.8% | 7,498 |
| 2022 | 2,172 | 52.0% | 7,416 |
| 2023 | 2,239 | 53.6% | 7,525 |
| 2024 | 2,651.9 | 63.3% | 7,458 |
| 2025 | 2,337.4 | 55.9% | 7,595 |
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 |
|---|---|---|---|---|---|---|---|---|
| CA | Natural Gas Fired Combined Cycle | CA | 195.5 | 157 | Aug 2003 | Operating · retirement planned | Dec 2043 | coming soon |
| CT1 | Natural Gas Fired Combined Cycle | CT | 198.9 | 160 | Aug 2003 | Operating · retirement planned | Dec 2043 | coming soon |
| CT2 | Natural Gas Fired Combined Cycle | CT | 198.9 | 160 | Aug 2003 | Operating · retirement planned | Dec 2043 | coming soon |
Owner / operator
Operator: PacifiCorp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PacifiCorp | 100.0% | 593 MW |
Nearby plants
Within 80 km.
| Transalta Centralia Generation | 730 MW | 15.4 km |
| Centralia Battery Energy Storage System | — | 17.6 km |
| Skookumchuck | 1 MW | 23.3 km |
| Mayfield | 162 MW | 28.1 km |
| Skookumchuck Wind Facility | 136 MW | 31.7 km |
| Mossyrock | 300 MW | 38.6 km |