TCLP TC Pipelines, LP - Common Units Representing Limited Partnership Interests (MM)

(NYSE:NBP)(Nasdaq:TCLP) Northern Border Pipeline Company announced today that it accepted the certificate of public convenience and necessity issued by the Federal Energy Regulatory Commission (FERC) on August 18, 2005 for its Chicago III Expansion Project. The certificate authorizes the Company to construct, modify and install compression facilities to increase capacity on its pipeline system from Harper, Iowa to North Hayden, Indiana. Northern Border Pipeline will construct a new 16,000 horsepower electric drive compressor unit at its existing Compressor Station No. 16 site in Johnson County, Iowa and make modifications to existing Compressor Station No. 17 in Scott County, Iowa and existing Compressor Station No. 18 in Bureau County, Illinois. The project will create an additional 130 million cubic feet per day of transportation capacity, which is fully subscribed by four shippers under long-term firm agreements with terms ranging from five and one half years to 10 years. Construction is estimated to cost approximately $21 million and the pipeline is expected to be in service in the spring of 2006. "We are very pleased to begin our third expansion of the Northern Border Pipeline into the Chicago market hub. This project will create value for our customers and it will improve the overall utilization of our pipeline by building additional capacity into the attractive Chicago market," said Bill Cordes, chairman of the Northern Border Pipeline Management Committee. "We expect construction to commence in the very near future to meet our target in service date of next spring." Northern Border Pipeline Company is a general partnership that owns and operates a 1,249-mile interstate pipeline that transported approximately 22 percent of all Canadian gas imported into the United States in 2004. Northern Border Partners, L.P. (NYSE:NBP) owns a 70 percent general partner interest in Northern Border Pipeline Company. The remaining 30 percent general partner interest is owned by TC PipeLines, LP (Nasdaq:TCLP). This press release includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Although Northern Border Pipeline Company believes that its expectations are based on reasonable assumptions it can give no assurance that such expectations will be achieved. Important factors that could cause actual results to differ materially from those in the forward-looking statements include receipt of required regulatory clearances; timely completion of construction; natural gas development in the Western Canadian Sedimentary Basin; competitive conditions in the overall natural gas markets; performance of contractual obligations by the shippers; our ability to market pipeline capacity on favorable terms; and the price of natural gas.