Washington State Orders TransAlta to Commence Environmental Cleanup at Centralia Power Plant
The Washington State Department of Ecology has issued a legal order requiring the Canadian power company TransAlta to begin a comprehensive environmental cleanup at its Centralia plant. The order, signed on December 29, mandates that the company first assess contamination levels at the facility located at 913 Big Hanaford Road before taking corrective actions to address the damage.
This regulatory move comes as the site transitions away from coal, though it creates a complex operational landscape for TransAlta. While the state is pushing for remediation, the U.S. Department of Energy recently issued an order requiring one coal-fired unit to remain operational through March, despite previous plans for shutdown.
Scope of the Environmental Assessment
The Department of Ecology’s order is broad, requiring TransAlta to evaluate and remediate contamination across four primary areas: air, soil, groundwater, and sediment. According to the agency, the long-term operation of the coal-fired plant has left a significant environmental footprint.
“Running a coal-fired power plant can cause several different types of contamination. For example, coal ash has metals in it, such as mercury and arsenic. The plant used fuels like diesel, which could have leaked out of tanks or pipelines. Burning coal in a boiler makes smoke, which might have toxic chemicals in it.” Washington State Department of Ecology
The agency noted that routine testing and the discovery of fuel leaks over the facility’s 50-year operational history have revealed levels of the following materials that exceed state legal limits:
- Mercury and Arsenic
- Iron
- Petroleum diesel
Navigating Conflicting Federal and State Mandates
TransAlta currently faces a challenging balancing act between state environmental requirements and federal energy mandates. The state’s cleanup order is designed to proceed regardless of whether the facility is active or dormant. Meanwhile, the federal government’s intervention to keep a coal unit online through March complicates the timeline for total site decommissioning.
Parallel to the cleanup efforts, the Department of Ecology is conducting an environmental analysis study regarding TransAlta’s plans to convert one of its units from coal to natural gas energy generation.
Key Takeaways: TransAlta Cleanup Order
- Legal Trigger: A legal agreement signed by the Department of Ecology on Dec. 29.
- Primary Targets: Contamination in soil, groundwater, sediment, and air.
- Key Pollutants: Mercury, arsenic, iron, and petroleum diesel.
- Federal Conflict: U.S. Department of Energy ordered one unit to remain operational through March.
- Future Transition: The site is slated for a conversion from coal to natural gas.
Frequently Asked Questions
What is the current status of the Centralia plant cleanup?
TransAlta has begun the initial steps of the cleanup process, starting with the assessment of contamination levels as mandated by the Washington State Department of Ecology.
Why is the cleanup necessary?
Over 50 years of operation, the plant has experienced fuel leaks and the accumulation of coal ash, leading to levels of mercury, arsenic, and petroleum diesel that exceed permitted state limits.
Will the cleanup stop the plant from operating?
No. The Department of Ecology specified that the cleanup process must begin regardless of the facility’s operational status, meaning remediation will occur alongside any continued power generation.
As TransAlta moves forward with the assessment, the focus remains on whether the company can successfully meet state environmental standards while adhering to the federal government’s energy production requirements.
Related reading