FILE - This June 29, 2018 photo shows tanks at the Enbridge Energy terminal in Superior, Wis. Enbridge Energy's plan to replace its aging Line 3 crude oil pipeline across northern Minnesota has hit another obstacle. Earlier this month a court said the project's environmental impact statement failed to address the possibility of an oil spill into the Lake Superior watershed. Now the Minnesota Pollution Control Agency and Department of Natural Resources say they can't take final action on the project's permits until the Public Utilities Commission addresses the deficiencies. (AP Photo/Jim Mone, File)

Canada’s biggest crude oil shipper says a lot needs to happen before it would propose a new pipeline to the West Coast.