6-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September 2015

TRANSALTA CORPORATION

(Translation of registrant’s name into English)

110-12^th Avenue S.W., Box 1900, Station “M”, Calgary, Alberta, T2P 2M1

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F____ Form 40-F X

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ____

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ____

I

The document listed below as Exhibit 99.1 to this Form 6-K is a copy of the Registrant’s news release dated September 30, 2015 announcing “TransAlta Reaches Agreement with Market Surveillance Administrator.”

This news release is being furnished, not filed, and will not be incorporated by reference into any registration statement filed by TransAlta Corporation under the Securities Act of 1933, as amended.

99.1 Press release dated September 30, 2015 announcing “TransAlta Reaches Agreement with Market Surveillance Administrator.”    

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	TransAlta Corporation
	By:   /s/Donald Tremblay
	Donald Tremblay
	Chief Financial Officer
Date: September 30, 2015

EXHIBIT INDEX

99.1 Press release dated September 30, 2015 announcing “TransAlta Reaches Agreement with Market Surveillance Administrator.”  

EX-99.1

  News Release

TransAlta Reaches Agreement with Market Surveillance Administrator

CALGARY, Alberta (September 30, 2015) – TransAlta Corporation (“TransAlta”) (TSX: TA; NYSE: TAC) advises today that it has reached an agreement with the Market Surveillance Administrator (the “MSA”) to settle all outstanding proceedings before the Alberta Utilities Commission (the “AUC”). An application for a consent order reflecting this settlement, which is subject to approval by the AUC, was filed today and will be reviewed at a hearing to be scheduled later this year.

Under the terms of the agreement, TransAlta will pay a total amount of $56 million including approximately $27 million as a repayment of “economic benefit” under the legislation, $4 million to cover the MSA’s legal and related costs, and a $25 million administrative penalty.

Additional terms include that TransAlta will pay the agreed amount in two separate installments with the first payment of $30 million due 30 days after the AUC issues an order approving the settlement. The remaining amount will be paid one year later.

About TransAlta:

TransAlta is a power generation and wholesale marketing company focused on creating long-term shareholder value. TransAlta maintains a low-to-moderate risk profile by operating a highly contracted portfolio of assets in Canada, the United States and Australia. TransAlta’s focus is to efficiently operate wind, hydro, natural gas and coal facilities in order to provide customers with a reliable, low-cost source of power. For over 100 years, TransAlta has been a responsible operator and a proud contributor to the communities in which it works and lives. TransAlta has been selected by Sustainalytics as one of Canada’s Top 50 Socially Responsible Companies since 2009 and is recognized globally for its leadership on sustainability and corporate responsibility standards by FTSE4Good.

Forward Looking Statements:

This news release contains forward-looking statements within the meaning of applicable securities laws, including statements regarding the settlement agreement with Alberta's Market Surveillance Administrator and the approval of the settlement by the Alberta Utilities Commission. These statements are based on TransAlta’s belief and assumptions based on information available at the time the assumptions were made. These statements are subject to a number of risks and uncertainties that may cause actual results to differ materially from those contemplated by the forward-looking statements. Some of the factors that could cause such differences include a decision by the Alberta Utilities Commission to alter the terms of, or not approve, the proposed settlement. Readers are cautioned not to place undue reliance on these forward looking statements, which reflect TransAlta’s expectations only as of the date of this news release. TransAlta disclaims any intention or obligation to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

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For more information:

Investor Inquiries:	Media Inquiries:
Jaeson Jaman	Stacey Hatcher
Manager, Investor Relations	Manager, Communications
Phone: 1-800-387-3598 in Canada and U.S.	Phone: Toll-free media number: 1-855-255-9184
Email: investor_relations@transalta.com	Email: ta_media_relations@transalta.com