The U.S. Supreme Court agreed on Monday to review a venue dispute that could determine whether Michigan’s effort to shut down part of Enbridge Energy LP’s Line 5 oil pipeline proceeds in state or federal court. The case centers on a Sixth U.S. Circuit Court of Appeals ruling that Enbridge missed a statutory 30-day deadline when it transferred the lawsuit, filed by Michigan Attorney General Dana Nessel, from state court to federal court more than two years after it was initiated. Nessel sued in June 2019 seeking to void the easement that allows a 4.5-mile underwater segment of Line 5 to operate beneath the Straits of Mackinac, arguing the aging pipe poses an unacceptable spill risk to the Great Lakes. Enbridge shifted the case to federal court in November 2021, contending the dispute affects U.S.–Canadian trade and raises federal issues, but the Sixth Circuit ordered the matter back to state court in June 2024. Calgary-based Enbridge, which moves about 540,000 barrels of crude oil and natural-gas liquids a day through the 645-mile line between Superior, Wisconsin, and Sarnia, Ontario, says the appellate ruling deepens a split among federal circuits over whether judges can create exceptions to the 30-day removal limit. Michigan maintains the dispute belongs in state court under the public-trust doctrine protecting natural resources. The high court will hear arguments in its next term, beginning in October. A decision could clarify removal procedures nationwide and influence other environmental and infrastructure battles that straddle state and federal jurisdictions.