TransCanada’s 100 per cent owned natural gas transmission system in Alberta gathers natural gas for use within the province and delivers it to provincial boundary points for connection with the Canadian Mainline, BC System, the Foothills System and other pipelines. The 23,186 km system is one of the largest carriers of natural gas in North America.

The Alberta System delivered 3,909 billion cubic feet (Bcf) of natural gas in 2004, as compared to deliveries of 3,833 Bcf in 2003. In 2004, the wholly-owned Alberta System gathered 64 per cent of the natural gas produced in Western Canada or 16 per cent of total North American production.

The Alberta System is regulated by the Alberta Energy and Utilities Board (EUB) primarily under the provisions of the Gas Utilities Act (Alberta) (GUA) and the Pipeline Act (Alberta). Under the GUA, its rates, tolls and other charges, and terms and conditions of service are subject to approval by the EUB.