TRANSALTA CENTRALIA GENERATION
Partly retiredCoal power plant
- Capacity
- 1,782 MW
- Primary fuel
- Coal
- County
- Lewis County
- Operator
- TRANSALTA CENTRALIA GEN LLC
- EIA plant ID
- 3845
- Generators
- 1
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 2,832 GWh
- Capacity factor (2024, EIA nameplate)
- 44%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 46.7556, -122.8579
TRANSALTA CENTRALIA GENERATION, a partly retired 1,782 MW Coal power plant in Lewis County, Washington. Most of its capacity was retired, most recently in 2020, according to EIA-860.
How TRANSALTA CENTRALIA GENERATION compares
EIA-860 lists 730 MW still operable at the site (conventional steam coal), against the 1,782 MW recorded for it. Its operator, TRANSALTA CENTRALIA GEN LLC, runs 2 operating plants in Washington totaling 731 MW. It shares Lewis County with 5 other operating plants, including CHEHALIS GENERATING FACILITY and MOSSYROCK.
EIA-860 lists 1 generator at the site with 730 MW of nameplate capacity, all conventional steam coal technology (this page's HIFLD capacity figure is 1,782 MW). Net generation was 2,832 GWh in 2024 (a 44% capacity factor), down 20% from 2022.
Grid neighborhood
The nearest named substation is BIG HANAFORD (230 kV), about 0.4 miles away; the closest transmission line found within 10 miles is a 500 kV line owned by BONNEVILLE POWER ADMINISTRATION, under 0.1 miles away. Another 4 operating power plants totaling 768 MW sit within 25 miles; the largest is CHEHALIS GENERATING FACILITY (593 MW, Natural Gas).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
TRANSALTA CENTRALIA GENERATION is a partly retired 1,782 MW coal power plant in Lewis County, WA, operated by TRANSALTA CENTRALIA GEN LLC. Lewis County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.3 of 5 at the 8th national percentile. Earthquake is the leading peril, rated Relatively Moderate by FEMA at the 97th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Lewis County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Moderate | 97th | 4.9 of 5 | 0.02 |
| Riverine flooding | Relatively Moderate | 95th | 4.8 of 5 | 0.29 |
| Heat wave | Relatively Low | 60th | 3.4 of 5 | 3.2 |
| Wildfire | Relatively Low | 47th | 2.9 of 5 | <0.01 |
| Winter weather | Relatively Low | 27th | 2.1 of 5 | 29.3 |
| Strong wind | Relatively Low | 23rd | 1.9 of 5 | 0.02 |
| Ice storm | Relatively Low | 22nd | 1.9 of 5 | 0.51 |
| Tornado | Very Low | 8th | 1.3 of 5 | 0.14 |
| Hail | Very Low | 6th | 1.2 of 5 | 0.03 |
| Lightning | Relatively Low | 4th | 1.2 of 5 | 6.6 |
Perils not assessed in Lewis County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Hurricane | FEMA rating is "Not Applicable" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Lewis County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.