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Department of Energy Mandates Centralia Unit 2 Remain Available for Operation for Additional 90 Days

TransAlta (NYSE: TAC) confirmed that its subsidiary TransAlta Centralia Generation LLC received an order from the U.S. Department of Energy requiring Centralia Unit 2 to remain available for operation for 90 days, through June 14, 2026.

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TransAlta (NYSE: TAC) confirmed that its subsidiary TransAlta Centralia Generation LLC received an order from the U.S. Department of Energy requiring Centralia Unit 2 to remain available for operation for 90 days, through June 14, 2026. TransAlta is evaluating the Order and will coordinate with state and federal governments.

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Positive

  • DOE order provides a clear 90-day operational timeline through June 14, 2026
  • TransAlta confirmed receipt of the Order and is engaging with governments to address requirements

Negative

  • Mandatory availability for 90 days may impose operational and compliance obligations on Centralia Unit 2
Argus Mar 18 session
-0.88% close to close Open Argus
Details

News Market Reaction – TAC

On Mar 18, the first trading day after this news, TAC closed 0.88% below the previous close.

Data tracked by StockTitan Argus for the Mar 18 session.

Key Figures

DOE order duration: 90 days Order end date: June 14, 2026 2025 Adjusted EBITDA: $1,104 million +5 more
DOE order duration
90 days
Centralia Unit 2 mandated availability
Order end date
June 14, 2026
DOE mandate for Centralia Unit 2 availability
2025 Adjusted EBITDA
$1,104 million
Full year 2025 results
2025 Free cash flow
$514 million
Full year 2025 results
2025 Revenue
$2.4 billion
Full year 2025 results
Annual dividend
$0.28 per share
2026 annual common dividend after 8% increase
2026 EBITDA guidance
$950–$1,050 million
Company 2026 outlook
2026 FCF guidance
$350–$450 million
Company 2026 outlook

Historical Context

5 past events · Latest: Mar 02
5 events
  1. Mar 02

    Preferred share terms

    24h Move
    -3.9%

    Conversion and dividend rate notice for Series A and B preferred shares.

  2. Feb 27

    Investor Day announcement

    24h Move
    +5.5%

    Scheduled Investor Day to outline strategy, long-term plan and outlook.

  3. Feb 27

    Data centre MOU

    24h Move
    +5.5%

    MOU for Keephills data centre with initial ~230 MW PPA and up to 1 GW.

  4. Feb 27

    Earnings and outlook

    24h Move
    +5.5%

    2025 results, 2026 guidance, dividend increase and strategic transactions.

  5. Jan 27

    Earnings call logistics

    24h Move
    +0.9%

    Announcement of timing and access details for 2025 results call.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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CALGARY, Alberta, March 17, 2026 (GLOBE NEWSWIRE) -- TransAlta Corporation (TransAlta or the Company) (TSX: TA) (NYSE: TAC) confirms that its subsidiary, TransAlta Centralia Generation LLC, has received an order (The Order) from the United States Department of Energy. The Order mandates that Centralia Unit 2 in Washington State remain available for operation, for a period of 90 days, until June 14, 2026.

TransAlta is currently evaluating the Order and will work with the state and federal governments in relation thereto. 

About TransAlta Corporation:

TransAlta is one of Canada’s largest publicly traded power generators, delivering reliable electricity across Canada, the United States and Western Australia. For more than 100 years, our people have safely operated and evolved essential energy infrastructure that powers customers and communities. Our technology-diverse portfolio and disciplined execution allow us to deliver dependable power across evolving energy systems. We take a practical, responsible approach to meeting today’s energy needs while building for what comes next.

For more information about TransAlta, visit our web site at transalta.com.

Cautionary Statement Regarding Forward-Looking Information

This news release includes “forward-looking information,” within the meaning of applicable Canadian securities laws, and “forward-looking statements,” within the meaning of applicable United States securities laws, including the Private Securities Litigation Reform Act of 1995 (collectively referred to herein as “forward-looking statements”). Forward-looking statements are not facts, but only predictions and generally can be identified by the use of statements that include phrases such as “may”, “will”, “believe”, “expect”, “estimate”, “anticipate”, “intend”, “plan”, “forecast”, “continue” or other similar words. Forward-looking statements are intended to provide the reader information about management’s current expectations and plans and readers are cautioned that such information may not be appropriate for other purposes. Forward-looking statements are subject to important risks and uncertainties and are based on certain key assumptions. All forward-looking statements reflect TransAlta’s beliefs and assumptions based on information available at the time the statements were made and as such are not guarantees of future performance. As actual results could vary significantly from the forward-looking statements, you should not put undue reliance on forward-looking statements and should not use future-oriented information or financial outlooks for anything other than their intended purpose. We do not update our forward-looking statements due to new information or future events, unless we are required to by law. For additional information on the assumptions made, and the risks and uncertainties which could cause actual results to differ from the anticipated results, refer to our most recent MD&A and the 2025 Annual Report, including the section titled “Governance and Risk Management” in our MD&A for the year ended December 31, 2025, filed under TransAlta’s profile on SEDAR+ at www.sedarplus.ca and with the U.S. Securities and Exchange Commission at www.sec.gov.

Note: All financial figures are in Canadian dollars unless otherwise indicated.

For more information:

Investor Inquiries:Media Inquiries:
Phone: 1-800-387-3598 in Canada and USPhone: 1-855-255-9184
Email: investor_relations@transalta.comEmail: ta_media_relations@transalta.com

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did TransAlta (TAC) announce about Centralia Unit 2 on March 17, 2026?

TransAlta confirmed receipt of a DOE order requiring Centralia Unit 2 to remain available for 90 days. According to the company, the availability period runs until June 14, 2026, and TransAlta is evaluating the Order with state and federal authorities.

How long must Centralia Unit 2 remain available under the DOE order for TAC?

The DOE order mandates availability for 90 days, ending on June 14, 2026. According to the company, this is a defined operational window and TransAlta will work with state and federal governments regarding the Order.

Will the DOE order change TransAlta’s operational control of Centralia Unit 2 (TAC)?

The order requires the unit to remain available but does not state ownership changes. According to the company, TransAlta Centralia Generation LLC received the Order and is evaluating it while coordinating with governments.

What steps is TransAlta (TAC) taking after receiving the DOE order for Centralia Unit 2?

TransAlta is evaluating the Order and will work with state and federal governments on next steps. According to the company, it intends to engage authorities to address the operational requirements through June 14, 2026.

Does the DOE order for Centralia Unit 2 affect TransAlta (TAC) timelines beyond June 14, 2026?

The Order specifies availability through June 14, 2026; it does not state actions beyond that date. According to the company, TransAlta is reviewing the Order and coordinating with government bodies to determine subsequent steps.

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