CBC.ca | Alberta pipelines: 6 major oil spills in recent history CBC.ca Five million litres of a bitumen-water-sand emulsion were found to have leaked Wednesday from a Nexen Energy pipeline south of Fort McMurray, Alta. — one of the biggest oil spills in the province's history. It adds further fuel to the debate over ... Massive Alberta oil spill bigger than Kalamazoo disaster Nexen pipeline spills oil emulsion in northern Alberta Alberta oil spill: When 'failsafe' leak detection systems fail |