In a significant victory for environmental advocates, the US Supreme Court has ruled in favour of Michigan, ensuring that a lawsuit aimed at shutting down a portion of the ageing Line 5 pipeline will proceed in state court. This unanimous decision, articulated by Justice Sonia Sotomayor, underscores the ongoing legal battle surrounding the ageing infrastructure that has posed risks to the Great Lakes since its inception in 1953.
Legal Context of the Ruling
The case centres on a 4.5-mile stretch of the Line 5 pipeline, which runs beneath the Straits of Mackinac, connecting Lake Michigan and Lake Huron. Michigan Attorney General Dana Nessel first initiated legal action in June 2019, seeking to invalidate the easement that permits Enbridge, the Canadian energy company, to operate this critical section of pipeline. In a decisive move, the state secured a restraining order from Judge James Jamo in June 2020, which temporarily halted operations of the pipeline, albeit Enbridge was allowed to continue under stringent safety measures.
In a turn of events, Enbridge attempted to shift the lawsuit to the federal court system in 2021, arguing that the case could significantly impact trade between the US and Canada. However, a ruling from a three-judge panel of the Sixth US Circuit Court of Appeals in June 2024 reinstated the case to state court, citing that Enbridge had exceeded the 30-day timeframe to request a jurisdictional change.
Ongoing Concerns About Pipeline Safety
The Line 5 pipeline has been a focal point of environmental concerns for several years. Worries about potential ruptures and catastrophic spills intensified following revelations in 2017 that Enbridge had been aware of protective coating deficiencies in the pipeline since 2014. The situation escalated further when a boat anchor struck the pipeline in 2018, amplifying fears that a leak could have devastating consequences for the Great Lakes ecosystem.
Under Governor Gretchen Whitmer’s leadership, the Michigan Department of Natural Resources revoked the pipeline’s easement in 2020, a decision that Enbridge has contested in federal court. While a federal judge issued a ruling halting Whitmer’s revocation, the implications for Nessel’s ongoing state case remain uncertain. Enbridge maintains that federal regulators, rather than state authorities, are responsible for overseeing the safety of Line 5 and have not identified any critical issues warranting its closure.
Future Developments and Environmental Implications
As Enbridge navigates the legal landscape, they are also pursuing permits for a proposed protective tunnel that would encase the pipeline beneath the Straits. In 2023, the Michigan Public Service Commission approved the necessary permits; however, this decision has prompted a coalition of environmental groups and Indigenous tribes to file a lawsuit aimed at overturning these state permits. The Michigan Supreme Court is currently deliberating on this matter.
Moreover, Enbridge is embroiled in a related legal dispute in Wisconsin, where a federal judge has ordered the company to cease operations of a portion of Line 5 located on the Bad River Band of Lake Superior’s reservation within three years. Enbridge has appealed this decision but has already commenced work to reroute the pipeline around the reservation. This has ignited further controversy, as the Bad River Band and environmental advocates assert that the rerouting will lead to significant ecological damage.
Why it Matters
The Supreme Court’s decision to keep Michigan’s lawsuit in state court represents a critical juncture in the ongoing battle over fossil fuel infrastructure and environmental protection. As climate change accelerates and the adverse effects of industrial activities become more apparent, this ruling could set a precedent for how state governments can assert their rights in protecting natural resources. The outcome of this case will not only influence the future of Line 5 but could also galvanise other states to take similar actions against ageing and potentially hazardous energy infrastructure. The stakes are high—not just for Michigan, but for the health of the Great Lakes and the communities that depend on them.
