Supreme Court rules for Michigan

Justice Sonia Sotomayor wrote for the court that Enbridge waited too long to seek a federal venue for the dispute.

The ruling is a significant victory for environmental advocates who have warned that the Line 5 pipeline poses a catastrophic risk to the region's water supply.

Michigan officials are pushing to decommission the section of the pipeline located in the Straits of Mackinac, citing its age and vulnerability.

The decision clears a major procedural hurdle, allowing the state to proceed with its efforts to shut down the infrastructure under state law.