Enbridge Inc. operates oil and gas pipelines, storage terminals, power plants, and gas transmission lines with assets in the United States and Canada. Subsidiaries include Union Gas, Texas Eastern Transmission (TETCo), North Dakota Pipeline (NDPL), Gulfstream Natural Gas System, Lakehead Pipeline, Spearhead Pipeline, Algonquin Gas Transmission, Alliance Pipeline, Express Pipeline, Maritimes & Northeast Pipeline (M&NP), East Tennessee Natural Gas (ETNG), Southeast Supply Header (SESH), and Vector Pipeline. Operations are organized into five business units: Liquids Pipelines, Gas Transmission & Midstream, Gas Distribution & Storage, Renewable Power Generation, and Energy Services. Common shares are listed on the TSX (ENB) and NYSE (ENB) exchanges.
Interprovincial Pipe Line (IPL) was incorporated in 1949 by the Canadian government to transport crude oil from Alberta to Regina. IPL acquired in Toronto-based Home Oil in 1986 and relocated offices to Alberta with the pipeline business in Edmonton and the oil business in Calgary. In 1988, IPL changed its name to Interhome Energy. In 1991, Interhome separated into publicly traded New Home Oil and Interprovincial Pipe Line which included Lakehead Pipe Line and Interprovincial Pipeline NW.
The company changed its name again in 1994 to IPL Energy. IPL Energy acquired gas distribution company Consumers' Gas in 1996 and changed its name in 1998 to Enbridge. Enbridge acquired Houston-based Midcoast Energy Resources in 2001 and Shell Gas Transmission in 2005. Enbridge acquired Houston-based Spectra Energy in 2017.