‘Massive and potentially permanent disruption’: Canada’s bleak view of Line 5 closure
WASHINGTON — Shutting down the Line 5 pipeline in Michigan would deal a “massive and potentially permanent” blow to Canada’s economy and energy security and risk lasting damage to relations with the United States, the federal government argues in court documents released Tuesday.
The documents mark Canada’s formal entry into the legal dispute between Michigan and the pipeline’s owner and operator, Calgary-based Enbridge Inc., which comes on the eve of the deadline imposed last November by Gov. Gretchen Whitmer.
They make largely the same argument Canada has been making for months: that Line 5 comprises a vital artery of North America’s energy infrastructure, and cutting it would be calamitous for both countries.
But they also raise the ante significantly by warning of the potential risk to the relationship between Canada and the U.S. if the pipeline ceases to operate.

