Centralia Generation

The Centralia Generating Facility is located in Centralia, Washington. The facility historically operated two coal-fired generating units.

In December 2025, TransAlta announced plans to convert Centralia Unit 2 from coal-fired generation to natural gas-fired generation, subject to regulatory approvals.

The conversion is intended to extend the useful life of the facility while supporting long-term reliability and reducing emissions intensity relative to coal-fired operations.

Further information is available through TransAlta’s public disclosures and a dedicated information page.

Centralia Mining

Coal Combustion Residuals (CCR) rule compliance data and information

The following information is in relation to the Centralia Mining Reclamation activity and is intended to satisfy the requirement under the CCR Rule 40 CFR 257.107 to maintain a publicly accessible internet site (CCR site) containing the required information. The required information will be posted when it is accomplished and is available.

Location restrictions

Operating criteria

Annual fugitive dust control report

Annual engineering inspection reports

Groundwater monitoring and corrective action

• Notification of assessment monitoring program
• Notification of return to detection monitoring program
• Notification of Appendix IV exceedances
• Notification of corrective measures assessment
• Corrective measures assessment
• Semi-annual corrective action report
• Notification of completion of corrective action

Reports

Closure and post-closure care

• Time extensions for initiating closure
• Time extensions for completing closure
• Notification of intent to initiate closure
• Notification of completion of closure
• Notification of intent to comply with alternative closure requirements
• Annual progress reports for alternative closure
• Notification recording a notation on property deed
• Post-closure care plan
• Notification of completion of post-closure care