  enbridge, inc. is an energy delivery company based in calgary, alberta, canada. it focuses on the transport and distribution of crude oil, natural gas, and other liquids. the company is the largest natural gas distributor in canada and a major oil pipeline operator in north america. in addition, it had invested renewable energy projects. the company has more than 11,000 employees, mostly in canada and the united states. ==history== the company was initially incorporated by imperial oil as interprovincial pipe line ltd. (ipl) on april 30, 1949 shortly after canada's first major oil discovery at leduc, alberta.    at the same year the company built its first oil pipeline leduc to regina, saskatchewan. in 1950, it was expanded through gretna, manitoba, to superior, wisconsin, in the united states.{{cite web | title = an environmental history of oil spills on the in
Companies_based_in_Calgary Companies_listed_on_the_New_York_Stock_Exchange Companies_listed_on_the_Toronto_Stock_Exchange Enbridge Natural_gas_companies_of_Canada Natural_gas_pipeline_companies Oil_companies_of_Canada Oil_pipeline_companies S&P/TSX_60_Index S&P/TSX_Composite_Index