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Operating more than 38,000 kilometres (24,000 miles) of pipelines transporting trillions of cubic feet of natural gas each year, we are the largest natural gas pipeline company in Canada and one of the largest in North America. We’ve been transporting natural gas since 1958. Our pipeline system links the rich natural gas resources of the Western Canada Sedimentary Basin (WCSB) – one of North America’s largest, most cost-competitive sources of natural gas – to markets across Canada and the United States. We own, operate and have interests in natural gas pipelines in both Canada and the U.S. We are also the general partner of TC PipeLines, LP, a limited partnership that owns interests in U.S. pipelines. We’re well posi- tioned to play a key role in bringing northern gas to the growing North American marketplace. 

## TRANSMISSION of NATURAL GAS 

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