TransCanada Launches Ads Featuring Ogallala Aquifer Expert

LINCOLN, NEBRASKA--(Marketwire - Sept. 26, 2011) - TransCanada Corporation (TSX:TRP) (NYSE:TRP) (TransCanada) announced today it will launch a series of ads featuring one of the preeminent experts on the Ogallala aquifer regarding the actual risks the proposed Keystone XL pipeline could pose to it.

University of Nebraska-Lincoln Professor Emeritus and Hydrogeologist Jim Goeke spent 41 years studying the unique structure of the Ogallala aquifer. He has spoken out about the aquifer for a number of months now, including testifying before the Nebraska Legislature's Natural Resources Committee meeting in November 2010 where he made the following statement:

"A leak of the Keystone XL pipeline would not affect the majority of the Ogallala aquifer...those who think that a leaking pipeline will destroy the aquifer in Nebraska need to understand that it would be localized to an area of 10's or 100's of feet around the pipeline."

It is important to note that Professor Goeke is speaking in the ads as an independent expert – he received no compensation from TransCanada. Goeke says he has spent his career investigating the aquifer and says he would not promote something he thought was going to harm that area. He says he simply wants to get the facts out.

"I have spent my career drilling holes into and through the Ogallala formation," said Professor Emeritus Jim Goeke. "There is a misconception that if the aquifer is contaminated the entire water supply of Nebraska is going to be in danger – that is absolutely false.

"I understand the passion and emotion around the aquifer," added Goeke. "Consistent with my life's work, I am compelled to speak out on this subject because science has been lacking from the debate in this State."

To view Professor Goeke's biography, please click here: http://snr.unl.edu/aboutus/who/people/faculty-member.asp?pid=41

To view the ad please click here http://www.youtube.com/watch?v=LCTGMFAIYRg

Keystone XL will be the most modern pipeline built to date in North America. No other pipeline will operate with the same safety and operating procedures. If approved by the end of 2011, TransCanada would begin construction in early 2012. This privately-funded, shovel-ready project would put 20,000 people to work – constructing the pipeline and manufacturing the equipment for it. Keystone XL would inject $7 billion into the U.S. economy, and allow the United States to receive a safe, secure and reliable supply of Canadian and U.S. oil to enhance America's energy security.

With more than 60 years experience, TransCanada is a leader in the responsible development and reliable operation of North American energy infrastructure including natural gas and oil pipelines, power generation and gas storage facilities. TransCanada's network of wholly owned natural gas pipelines extends more than 57,000 kilometres (35,500 miles), tapping into virtually all major gas supply basins in North America. TransCanada is one of the continent's largest providers of gas storage and related services with approximately 380 billion cubic feet of storage capacity. A growing independent power producer, TransCanada owns or has interests in over 10,800 megawatts of power generation in Canada and the United States. TransCanada is developing one of North America's largest oil delivery systems. TransCanada's common shares trade on the Toronto and New York stock exchanges under the symbol TRP. For more information visit: www.transcanada.com and follow us on Twitter @TransCanada.

Forward-Looking Information

This publication contains forward-looking information relating to TransCanada's and its subsidiaries' future financial and operational plans and outlook (such statements are usually accompanied by words such as "anticipate", "expect", "would" or similar). All forward-looking statements reflect TransCanada's beliefs and assumptions based on information available at the time the statements were made, are given as of the date of this publication, and are subject to important risks and uncertainties. Readers are cautioned not to place undue reliance on this forward-looking information. TransCanada undertakes no obligation to update or revise any forward-looking information except as required by law. For additional information on the assumptions made, and the risks and uncertainties which could cause actual results to differ from the anticipated results, refer to TransCanada's Management's Discussion and Analysis dated February 14, 2011 under TransCanada's profile on SEDAR at www.sedar.com and other reports filed by TransCanada with Canadian securities regulators and with the U.S. Securities and Exchange Commission.