Michigan Triumphs as US Supreme Court Keeps Line 5 Pipeline Dispute in State Hands

Daniel Green, Environment Correspondent
4 Min Read
⏱️ 3 min read

In a significant legal victory for Michigan, the US Supreme Court has ruled that the state’s efforts to shut down a contentious section of the ageing Line 5 pipeline will remain in state court. This decision, announced on Wednesday, underscores the ongoing battle over the environmental implications of this pipeline, which has transported crude oil and natural gas liquids across the Straits of Mackinac since 1953.

Supreme Court Decision

Justice Sonia Sotomayor delivered the unanimous ruling, stating that Enbridge, the energy company operating the pipeline, had delayed too long in attempting to shift the case to federal jurisdiction. This ruling reinforces the state of Michigan’s authority in a dispute that has implications not only for local ecology but also for broader regional trade.

Michigan Attorney General Dana Nessel initiated the lawsuit in June 2019, aiming to annul the easement that permits Enbridge to operate a 4.5-mile section of the pipeline beneath the straits connecting Lakes Michigan and Huron. Following a restraining order from Ingham County Judge James Jamo in June 2020, Enbridge was allowed to continue operations, provided it adhered to certain safety measures.

The Line 5 pipeline has long been a source of concern, particularly regarding the risk of a catastrophic spill in the Great Lakes. In 2017, revelations surfaced that Enbridge was aware of gaps in the pipeline’s protective coating dating back to 2014. An incident in 2018, where a boat anchor damaged the pipeline, heightened fears among environmentalists and local communities.

Governor Gretchen Whitmer’s administration took decisive action in 2020, revoking the easement for Line 5. Although Enbridge successfully obtained a federal ruling to halt this revocation, the state is appealing the decision. As this legal tug-of-war unfolds, Nessel’s case in state court remains a focal point, further complicated by Enbridge’s arguments that federal regulators should oversee Line 5’s safety.

Future of Line 5: Tunnel Plans and Environmental Pushback

In a bid to alleviate safety concerns, Enbridge is pursuing permits to encase the pipeline in a protective tunnel beneath the straits. The Michigan Public Service Commission approved necessary permits in 2023; however, this has sparked yet another legal challenge. A coalition of environmental organisations and Native American tribes in Michigan has filed a lawsuit aimed at invalidating the state permits for the tunnel project, with the state supreme court currently deliberating on the matter.

Additionally, the pipeline faces scrutiny in Wisconsin, where a federal judge ordered Enbridge to shut down a segment of Line 5 running across the Bad River Band of Lake Superior’s reservation. Enbridge has appealed this order while simultaneously beginning reroute construction, which has attracted opposition from both the Bad River Band and environmental advocates who argue that the environmental impact has been underestimated.

Why it Matters

The Supreme Court’s ruling is a pivotal moment in the ongoing struggle between environmental protection and energy infrastructure needs. As the Great Lakes hold a crucial position in both the ecological health of the region and the livelihoods of local communities, the outcome of this legal battle could set significant precedents for future energy projects and environmental policy in the United States. The implications of this case extend beyond Michigan, highlighting the critical need for robust environmental safeguards in the face of infrastructural demands.

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Daniel Green covers environmental issues with a focus on biodiversity, conservation, and sustainable development. He holds a degree in Environmental Science from Cambridge and worked as a researcher for WWF before transitioning to journalism. His in-depth features on wildlife trafficking and deforestation have influenced policy discussions at both national and international levels.
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