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TransCanada Second Quarter 2006 Teleconference and Webcast Advisory

CALGARY, Alberta – July 18, 2006 – (TSX: TRP) (NYSE: TRP) – TransCanada Corporation will release its second quarter 2006 financial results mid-day Thursday, July 27, 2006.

Analysts, members of the media and other interested parties are invited to participate in a teleconference and webcast July 27 at 2 p.m. (Mountain) / 4 p.m. (Eastern) to discuss the second quarter 2006 financial results, and general developments and issues concerning the company.

To participate in the teleconference, please call 1-866-898-9626 or 416-340-2216 (Toronto area). Please dial in 10 minutes prior to the start of the call. No passcode is required. A live webcast of the teleconference will also be available on TransCanada’s website (www.transcanada.com).

The conference will begin with a short address by members of TransCanada’s executive management, followed by a question and answer period for investment analysts. A question and answer period for members of the media will immediately follow.

A replay of the teleconference will be available two hours after the conclusion of the call until midnight (Eastern) August 3, 2006. Please call 1-800-408-3053 or 416-695-5800 (Toronto area) and enter passcode 3192148. The webcast will be archived and available for replay on www.transcanada.com.

As a result of changes to the company’s executive team, effective June 1, 2006, the composition and names of the company’s reportable segments have been realigned to that of the internal organization. The revised segments are Pipelines and Energy. Pipelines includes the company’s natural gas and oil pipelines in Canada, the United States and Mexico. Energy includes the company’s power operations, natural gas storage and liquefied natural gas businesses.

TransCanada is a leader in the responsible development and reliable operation of North American energy infrastructure. TransCanada’s network of more than 41,000 kilometres (25,600 miles) of pipeline transports the majority of Western Canada’s natural gas production to key Canadian and U.S. markets. A growing independent power producer, TransCanada owns, or has interests in, approximately 6,700 megawatts of power generation in Canada and the United States. TransCanada’s common shares trade on the Toronto and New York stock exchanges under the symbol TRP.

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For further information, please contact:

Media Inquiries:

TransCanada
Jennifer Varey
(403) 920-7859 or Toll Free (800) 608-7859

Investor & Analyst Inquiries:

David Moneta/Myles Dougan
(403) 920-7911