Enbridge attorney Alice Loughran told a three-judge panel at the 7th U.S. Circuit Court of Appeals that the closure order violates a 1977 treaty between the United States and Canada.
A Wisconsin court ruling in June gave Calgary-based Enbridge Inc. an ultimatum: reroute the pipeline around an Indigenous reserve within three years or shut it down.
The Line 5 pipeline can keep moving fossil fuels through an Indigenous band's territory in Wisconsin for now, but operations on that property "must cease'' in 2026, a judge says.
A district court judge in Wisconsin will hear arguments about whether or not to shut down Line 5, a critical cross-border energy conduit between Canada and the U.S.