TC PipeLines, LP to Issue Third Quarter Results on October 26

TC PipeLines, LP (NASDAQ:TCLP) (the Partnership) will release its third quarter 2011 financial results after market close on Wednesday October, 26. Steve Becker, president of the general partner, will discuss financial results and company developments in a teleconference and webcast on Thursday, October 27, 2011 at 11 a.m. central daylight time (CDT)/12 p.m. eastern daylight time (EDT).

Analysts, members of the media and other interested parties are invited to participate by calling 866.225.0198. Please dial in 10 minutes prior to the start of the call. No pass code is required. A live webcast of the conference call will also be available through the Partnership's website at www.tcpipelineslp.com. Slides for the conference call will be posted on the Partnership's website under "Event and Presentations" prior to the webcast.

A replay of the teleconference will also be available two hours after the conclusion of the call and until 11 p.m. (CDT) and midnight (EDT) on November 3, 2011, by calling 800.408.3053, then entering pass code 8686876.

TC PipeLines, LP has interests in 5,560 miles of federally regulated U.S. interstate natural gas pipelines which serve markets across the United States and Eastern Canada. This includes significant interests in Great Lakes Gas Transmission Limited Partnership and Northern Border Pipeline Company as well as 25 per cent ownership interest in each of Gas Transmission Northwest LLC, and Bison Pipeline LLC. TC PipeLines, LP also has 100 per cent ownership of North Baja Pipeline, LLC and Tuscarora Gas Transmission Company. TC PipeLines, LP is managed by its general partner, TC PipeLines GP, Inc., an indirect wholly owned subsidiary of TransCanada Corporation. TC PipeLines GP, Inc. also holds common units of TC PipeLines, LP. Common units of TC PipeLines, LP are quoted on the NASDAQ Global Select Market and trade under the symbol "TCLP." For more information about TC PipeLines, LP, visit the Partnership's website at www.tcpipelineslp.com.

Contacts: TC PipeLines, LP Media Enquiries Terry Cunha/Shawn Howard 403.920.7859 or 800.608.7859 TC PipeLines, LP Unitholder and Analyst Enquiries Lee Evans 877.290.2772 or [e-mail]