TransCanada Appeals NEB Decision to Federal Court of Appeal

CALGARY, Alberta - March 21, 2003 - (TSX: TRP) (NYSE: TRP) - TransCanada PipeLines Limited announced today that it is applying to the Federal Court of Appeal for leave to appeal the National Energy Board's (NEB) RH-R-1-2002 Decision issued February 20, 2003. In this Decision, the NEB dismissed TransCanada's September 2002 request for a Review and Variance of the NEB's June 2002 RH-4-2001 Decision on the company's Fair Return application.

TransCanada is concerned with the effect of the NEB Decision on TransCanada's ability to obtain a fair return on the company's investment in its Canadian Mainline natural gas transmission system. TransCanada is basing its leave application on two questions of law.

TransCanada is a leading North American energy company. We are focused on natural gas transmission and power services with employees who are expert in these businesses. Our network of approximately 38,000 kilometres of pipeline transports the majority of western Canada's natural gas production to the fastest growing markets in Canada and the United States. TransCanada has interests in more than 4,000 megawatts of power - an equal amount of power can meet the needs of about four million average households. Our common shares trade under the symbol TRP on the Toronto and New York stock exchanges.

Forward Looking Information

Certain information in this news release is forward-looking and is subject to important risks and uncertainties. The results or events predicted in this information may differ from actual results or events. Factors which could cause actual results or events to differ materially from current expectations include, among other things, the ability of TransCanada to successfully implement its strategic initiatives and whether such strategic initiatives will yield the expected benefits, the availability and price of energy commodities, regulatory decisions, competitive factors in the pipeline and power industry sectors, and the current economic conditions in North America. For additional information on these and other factors, see the reports filed by TransCanada with Canadian securities regulators and with the United States Securities and Exchange Commission. TransCanada disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

For further information, please contact:

Media Inquiries:
Glenn Herchak / Hejdi Feick
(403) 920-7877

Investor & Analyst Inquiries:
David Moneta / Debbie Persad
(403) 920-7911