Portland Montreal PipelineThe
Portland Montreal Pipeline is a series of underground
crude oil pipelines connecting
South Portland, Maine, in the
United States with
Montreal,
Quebec, in
Canada. As of early 2016, the pipeline transports limited volumes,
[1] sufficient to keep the pipeline wet.
The pipeline also supplied crude to the Suncor Montreal-Est refinery during supply interruptions due to the 2016 Fort McMurray wildfires. There PMP pipeline actually consists of 3 lines (a 24" pipe, an18" pipe, and a decommissioned pipe). As a point of reference, ENB's Line 5 splits into two 20" pipes in the Strait of Mackinac which carry 540,000 bpd
I think it is safe to assume ENB has a contingency plan in place to service the SU and IMO refineries in Sarnia with trucking in the short term, and/or via reversing Line 9 (300,000 bpd capacity) if a long term shutdown of Line 5 happens.
The message is that Line 5 is a career maker/breaker for Gretchen and a nightmare for the citizens of the Upper Pennisula, but to SU and ENB, the closure of Line 5 (temporary or permanent) will just be another bad day at work. The real loser would be Michigan.