Trans Québec & Maritimes Pipeline Inc. (TQM Pipeline) is owned equally by two major Canadian companies involved in the natural gas industy: 9265-0860 Québec Inc. (a wholly-owned subsidiary of Énergir, L.P.) and TransCanada PipeLines Limited.
TQM Pipeline was founded in 1980 and has operated a gas transmission system since 1982, from Les Cèdres, West of Montréal, where it is connected to the TransCanada PipeLines system, to Lévis (Saint-Nicolas), on the South Shore of the St. Lawrence River near Québec City. In December 1998, TQM Pipeline completed the pipeline which extends its system from Terrebonne (Lachenaie), East of Montréal, to East Hereford on the New Hampshire border to be connected to Portland Natural Gas Transmission System. TQM Pipeline's right-of-way covers 572 km and its system has 31 delivery points and two compressor stations.
Since its foundation, TQM Pipeline has fulfilled its mandate aiming to transport natural gas efficiently, reliably and safely. The company greatly contributed to the development of natural gas in Québec where its use increased from 2.9 billion cubic metres in 1980 to 6.3 billion cubic metres in 2000; TQM Pipeline meets more than half of the total demand for natural gas in Québec since 1991.
TQM Pipeline is regulated by the National Energy Board with regard to its transportation tolls and its facilities.