Trans Mountain Pipeline, the only pipeline that connects crude oil production areas in Alberta to Canada’s West Coast and the U.S. Pacific Northwest, has started to resume operations after a three-week shutdown. The pipeline closure — the longest in TMP’s 68-year history — began November 14 after major flooding exposed portions of the 300-Mb/d conduit, which also carries some refined products. Fortunately, Trans Mountain did not suffer any severe damage, breaks, or spills, and its operators were able to initiate a phased restart on December 5 at reduced pressures. Full service is expected to be restored soon. So what happens when a primary source of crude oil to five refineries — four in Washington state and one in British Columbia — is removed from service with little notice? In today’s RBN blog, we discuss the impacts.

