TransCanada Disappointed with NEB Decision

CALGARY, Alberta – June 21, 2002 – (TSX: TRP) (NYSE: TRP) – TransCanada PipeLines Limited today received the National Energy Board’s (NEB’s) decision on TransCanada’s Fair Return application to determine the cost of capital to be included in the calculation of 2001 and 2002 tolls on TransCanada’s Canadian Mainline natural gas transmission system.

TransCanada is disappointed with the NEB’s decision to decline to adopt the after-tax weighted-average cost of capital (ATWACC) methodology and to only grant a rate of return on common equity for the Canadian Mainline of 9.61 per cent for 2001 and 9.53 per cent for 2002. The NEB increased the Mainline’s deemed common equity ratio from 30 to 33 per cent.

The decision is expected to have little impact on TransCanada’s financial results.

TransCanada is a leading North American energy company. It is focused on natural gas transmission and power services with employees who are expert in these businesses. The company’s 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 owns, controls or is developing a total of approximately 2,250 megawatts of power -- an amount of power that can meet the needs of more than two million average households. The company’s common shares trade under the symbol TRP on the Toronto and New York stock exchanges. Visit us on the internet at for more information.

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.

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