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TC PipeLines, LP First Quarter 2002 Teleconference and Web Cast Advisory

Calgary, Alberta - April 15, 2002 - (Nasdaq: TCLP) - TC PipeLines, LP will release its first quarter 2002 financial results after markets close on Thursday, April 18, 2002. TC PipeLines will hold a teleconference and audio web cast on Friday, April 19 at 9:00 a.m. (eastern) to discuss the first quarter 2002 financial results, general developments and issues concerning the Partnership. The call will be hosted by Ron Turner, President and Chief Executive Officer of TC PipeLines GP, Inc., the general partner.


	What: TC PipeLines, LP First Quarter 2002 Financial Results Teleconference and Web Cast
	When: 9:00 a.m. (eastern) Friday, April 19, 2002
	Where: (800) 273-9672 (no passcode required) OR www.tcpipelineslp.com / News Room / Presentations
	Investor Contact: Theresa Jang (877) 290-2772 investor_relations@tcpipelineslp.com
	Media Contact: Glenn Herchak/Kurt Kadatz (403) 920-7859

A replay of the teleconference will be available two hours after the conclusion of the call until midnight, April 26, 2002, by dialing (800) 408-3053 then entering passcode 1097057. The web cast will also be archived and available for replay.

TC PipeLines, LP is a publicly held limited partnership. It owns a 30% interest in Northern Border Pipeline Company, a Texas general partnership, and a 49% interest in Tuscarora Gas Transmission Company, a Nevada general partnership. Northern Border Pipeline, which is owned 70% by Northern Border Partners, L.P., a publicly traded master limited partnership controlled by affiliates of Enron Corp., owns a 1,249-mile United States interstate pipeline system that transports natural gas from the Montana-Saskatchewan border to markets in the midwestern United States. Tuscarora owns a 229-mile United States interstate pipeline system that transports natural gas from Oregon, where it interconnects with facilities of PG&E National Energy Group, Gas Transmission Northwest, to northern Nevada. TC PipeLines, LP is managed by its general partner, TC PipeLines GP, Inc., a wholly owned subsidiary of TransCanada PipeLines Limited. Subsidiaries of TransCanada also hold common and subordinated units of the Partnership. Common units of TC PipeLines, LP are quoted on the Nasdaq Stock Market and trade under the symbol "TCLP". For more information about TC PipeLines, LP, visit the Partnership's Internet site at www.tcpipelineslp.com.