A long-running dispute over shutting down Enbridge’s Line 5 pipeline will be heard in Michigan state court after a Supreme Court ruling seen as a win for pipeline opponents.

Michigan Attorney General Dana Nessel has since 2019 been trying to revoke an easement that lets the pipeline cross the Straits of Mackinac, a narrow waterway that connects lakes Michigan and Huron. Nessel, along with environmentalists and Native tribes, has argued that the pipeline carries the risk of another spill like that in 2010, when the pipeline released 20,000 barrels of heavy crude into a tributary of the Kalamazoo River.

Canadian company Enbridge owns the 645-mile line that conveys crude oil and natural gas liquids from Superior, Wisconsin, to Sarnia, Ontario, with 4.5 miles of pipeline along the lakebed of the Straits, according to Grist.

Enbridge’s lawyer had argued the case should be heard in federal court, with opponents preferring it to be handled by state judges. The Supreme Court’s ruling was unanimous, with Justice Sonia Sotomayor writing that Enbridge waited too long to move the case to federal court and that the company’s “counterarguments are not persuasive,” Grist reported.