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In a significant ruling, the US Supreme Court has affirmed Michigan’s right to pursue legal action aimed at halting operations of Enbridge’s ageing Line 5 pipeline, which runs beneath the Straits of Mackinac. This unanimous decision, articulated by Justice Sonia Sotomayor, ensures that the state’s lawsuit will remain in the jurisdiction of state courts, marking a pivotal moment in an ongoing battle over environmental safety and energy infrastructure.
Background of the Legal Dispute
Line 5, an integral yet contentious energy conduit, has been transporting crude oil and natural gas liquids between Superior, Wisconsin, and Sarnia, Ontario, since 1953. The pipeline’s route beneath the Great Lakes has sparked increasing concerns about potential environmental catastrophes, particularly following revelations in 2017 that Enbridge had been aware of significant gaps in the pipeline’s protective coating for several years.
Michigan Attorney General Dana Nessel initiated the state’s lawsuit in June 2019, aiming to invalidate the easement that permits Enbridge to operate a 4.5-mile section of this pipeline under the straits connecting Lake Michigan and Lake Huron. In June 2020, Nessel secured a restraining order from Ingham County Judge James Jamo, mandating a temporary shutdown of the pipeline. However, operations resumed after Enbridge complied with specified safety measures.
Supreme Court Decision
Enbridge sought to shift the case to federal court in 2021, citing implications for US-Canadian trade. However, the Sixth Circuit Court of Appeals ruled against this move in June 2024, determining that the company had failed to meet a critical 30-day deadline for changing jurisdictions.
The Supreme Court’s ruling reinforces the state’s authority in this matter, effectively denying Enbridge’s attempts to evade state oversight. This legal outcome is crucial as Michigan grapples with the implications of an ageing infrastructure that poses a direct threat to its environmental integrity.
Environmental Concerns and Ongoing Legal Battles
The risks associated with Line 5 are underscored by the pipeline’s troubled history. The 2018 incident, where a boat anchor damaged the pipeline, heightened fears about a possible catastrophic spill. In 2020, Governor Gretchen Whitmer’s administration revoked the easement for Line 5, a decision that Enbridge contested through a separate federal lawsuit. While a federal judge had initially blocked Whitmer’s revocation, the state has appealed the ruling, continuing the complex legal saga surrounding this contentious pipeline.
In addition to the ongoing state court proceedings, Enbridge is pursuing permits to construct a new protective tunnel for the pipeline beneath the straits. Although the Michigan Public Service Commission granted these permits in 2023, environmental groups and Michigan tribes have mobilised to challenge this decision in court, asserting that the potential ecological damage has not been sufficiently evaluated.
Broader Implications and Challenges
The controversy surrounding Line 5 extends beyond Michigan, with related legal disputes emerging in Wisconsin. A federal judge recently ordered Enbridge to cease operations on part of the pipeline that crosses the Bad River Band of Lake Superior’s reservation, further complicating the company’s operational landscape. Enbridge is currently appealing this order while attempting to reroute its operations, a move that has faced opposition from both the Bad River Band and environmental advocates who argue that the reroute poses unassessed risks to the environment.
Why it Matters
The Supreme Court’s affirmation of Michigan’s lawsuit represents a crucial victory for environmental advocates and state sovereignty in the face of corporate interests. As the battle over Line 5 unfolds, it highlights the broader struggle to balance energy needs with environmental protection in the era of climate change. The outcome of this case could set a precedent for how states regulate old infrastructure and manage the risks associated with fossil fuel transportation in sensitive ecological areas. The stakes are high—not only for the Great Lakes’ ecosystem but for the future of energy policy in the United States.
