Lawmakers demand answers from Keystone operator after largest oil spill in pipeline’s history

As TC Energy works to fully restart its 591,000 b/d Keystone Pipeline System after a spill discovered late Dec. 7 forced it to shut down, the operator is also facing questions from lawmakers demanding accountability and assurances on remediation and spill prevention plans. The latest leak on Keystone, which primarily carries heavy Canadian crude oil to the US Midwest and…