Chehalis Generating Facility
Natural gas power plant in Lewis County, Washington. 593.3 MW of nameplate capacity across 3 generators, operated by PacifiCorp.
Also known as Chehalis Generation Facility · EIA plant 55662
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Key facts
- Capacity
- 593.3 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- August 2003First generator online
- Operator
- PacifiCorpEIA operator ID 14354
- Grid
- BPATBalancing authority BPAT
- Price nodes
- None linkedNo verified ISO node
- Location
- Lewis County, WA46.6225, −122.9131
- EIA plant ID
- 55662EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Chehalis Generating Facility produces
Free · EIA-923Net generation, 2025
2.34 TWh
2,337,422 MWh, final
Capacity factor, 2025
45.0%
2024: 50.9%
January to July 2026
1.41 TWh
Provisional
Range, 2015 to 2025
1.1–2.7
TWh a year. Low 2015, high 2024
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | 524,257 | Not reported | 3 of 12 |
| 2004 | 2,548,098 | Not reported | 12 of 12 |
| 2005 | 2,240,865 | Not reported | 12 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | 1,887,450 | Not reported | 12 of 12 |
| 2008 | 1,030,828 | Not reported | 6 of 12 |
| 2009 | 1,747,253 | Not reported | 12 of 12 |
| 2010 | 1,288,224 | 24.8% | 12 of 12 |
| 2011 | 664,973 | 12.8% | 12 of 12 |
| 2012 | 849,363 | 16.3% | 12 of 12 |
| 2013 | 1,674,202 | Not reported | 12 of 12 |
| 2014 | 1,734,107 | Not reported | 8 of 12 |
| 2015 | 1,092,993 | 17.9% | 12 of 12 |
| 2016 | 1,420,028 | 23.2% | 12 of 12 |
| 2017 | 1,758,943 | 28.8% | 12 of 12 |
| 2018 | 1,741,969 | 28.5% | 12 of 12 |
| 2019 | 2,431,536 | 39.8% | 12 of 12 |
| 2020 | 2,407,317 | 39.3% | 12 of 12 |
| 2021 | 2,248,237 | 36.8% | 12 of 12 |
| 2022 | 2,171,994 | 35.5% | 12 of 12 |
| 2023 | 2,239,007 | Not reported | 12 of 12 |
| 2024 | 2,651,878 | 50.9% | 12 of 12 |
| 2025 | 2,337,422 | 45.0% | 12 of 12 |
| 2026 (provisional, partial year) | 1,411,795 | 46.8% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
1.05M
US short tons. 2024: 1.18M
SO₂, 2025
11
US short tons
NOx, 2025
90
US short tons
CO₂ per MWh, calculated
0.45 t
About 900 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (CT1, CT2), matched to EIA plant 55662 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
Not reported
million gallons as reported; not used, see note
Consumption, 2024
Not reported
million gallons
Source
Not reported
Dry cooling
Watershed stress
Very low/none · 0.160
USGS SUI, HUC12 Dillenbaugh Creek-Chehalis River
0 of 12 cooling months report withdrawal. Dry cooling with no reported withdrawal; not tested. Consumption is below 5% of a large reported withdrawal, so the withdrawal is not used. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CA | Natural Gas Fired Combined Cycle | 195.5 | August 2003 |
| CT1 | Natural Gas Fired Combined Cycle | 198.9 | August 2003 |
| CT2 | Natural Gas Fired Combined Cycle | 198.9 | August 2003 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists PacifiCorp as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Chehalis Generating Facility
How much power does Chehalis Generating Facility produce?
Chehalis Generating Facility reported 2,337,422 MWh (2.34 TWh) of net generation in 2025, a 45.0% capacity factor on 593.3 MW of nameplate capacity. From January to July 2026 it reported 1.41 TWh, which is provisional.
Where is Chehalis Generating Facility?
Chehalis Generating Facility is in Lewis County, Washington, at 46.6225, −122.9131. It is in the Bonneville Power Administration balancing area (BPAT).
Who operates Chehalis Generating Facility?
EIA-860M for August 2026 lists PacifiCorp as the operator (EIA operator ID 14354). The operator is not always the owner.
When did Chehalis Generating Facility start operating?
Its first generator began operating in August 2003, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page