FORM 6-K
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934

For the month of May, 2004

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 whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes .....  No ..X...

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):  82-________

 

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Evaluation of Disclosure Controls and Procedures

TransAlta has designed disclosure controls and procedures to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to the Chief Executive Officer and Chief Financial Officer by others within the Company, including its consolidated subsidiaries, on a regular basis, in particular during the period in which its Current Reports on Form 6-K relating to quarterly financial results are being prepared. The Chief Executive Officer and Chief Financial Officer have evaluated the effectiveness of the disclosure controls and procedures as of a date within 90 days of the date of this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded, as of that evaluation date, that the Company’s disclosure controls and procedures were effective to ensure that material information relating to the Company, including its consolidated subsidiaries, was made known to them by others within those entities during the period in which this report was being prepared. There have been no significant changes in the internal controls or in other factors that could significantly affect internal controls subsequent to the date of the most recent evaluation by the Chief Executive Officer and Chief Financial Officer, including any corrective action with regard to significant deficiencies and material weaknesses.

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EXHIBITS

Exhibit 1	Press release dated May 13, 2004.

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TransAlta announces commercial paper program

CALGARY, Alberta (May 13, 2004) - TransAlta Corporation (TSX: TA; NYSE: TAC) has restructured its Canadian commercial paper program (the "Program").  A maximum of $200 million of short-term notes may be issued and outstanding under the Program at any time.  Notes will be issued by TransAlta and guaranteed by TransAlta Utilities Corporation ("TAU"), a wholly-owned subsidiary of TransAlta.  The obligations guaranteed by TAU rank equally with its secured debentures.

Notes issued under the Program have been rated R-1 (low) by Dominion Bond Rating Service.

The securities offered have not been and will not be registered under the Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements.

All currency is expressed in Canadian dollars except where noted.

TransAlta is among Canada's largest non-regulated power generation and wholesale marketing companies. We have coal-fired, gas-fired, hydro and renewable generation assets in Canada, the U.S., Mexico and Australia. With approximately 10,000 megawatts of capacity either in operation, under construction or in development, our focus is to efficiently operate our assets in order to provide our wholesale customers with a reliable, low-cost source of power.

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For more information:

Media inquiries:

Investor inquiries:

Tim Richter

Daniel J. Pigeon

Senior Advisor

Director, Investor Relations

Media & Government Relations

Phone:  1-800-387-3598 in Canada and U.S.

Phone:  (403) 267-7238   

    

Phone:  (403) 267-2520    Fax (403) 267-2590

Pager: (403) 213-7041

E-mail:  investor_relations@transalta.com

Email:  media_relations@transalta.com

   

 

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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

(Registrant)

By: /s/ Alison T. Love

(Signature)

Alison T. Love, Corporate Secretary

Date: May 13, 2004