目前关闭了密歇根州麦基诺海峡下的第5行管道的两条腿，将原油和液态天然气带到密歇根州的海峡下，被某些人视为对大湖区的环境威胁，目前已关闭。

州官员担心该线的加拿大运营商Enbridge Inc.在本月早些时候对其东路损坏的报告如何处理。他们声称该公司未能提供有关损坏原因的信息，并且在关闭该线路时，它在不咨询国家的情况下重新激活了西路。

In response to a restraining order sought by Michigan Attorney General Dana Nessel [D], Ingham County Circuit Court Judge James Jamo ruled June 25 against continued west leg operation and barred restart of the east leg.

The shutdown was to start within 24 hours, and remain in place until a hearing scheduled for June 30 on the state’s request for a preliminary injunction to determine if the two lines are safe. The court also ruled that Enbridge should disclose any information relevant to recent pipeline damage.

67岁管道的争议在6月18日浮出水面，当时恩布里奇（Enbridge）作为维护和检查计划的一部分，告知该州，东腿的锚点支撑受到了持续的损害。支撑位于管道的一部分中约150英尺，该部分显示了5月26日左右发现的涂层损坏。

Nessel praised the court’s ruling.

“Enbridge has failed to provide the state with information about the cause of this significant development involving Line 5, and so I’m very grateful for the court’s decision today,” he said. “While the fact that Enbridge reactivated one of the lines before consulting with the state is concerning, that the company has failed to disclose the cause of this damage is equally alarming, considering the impact a breach in the pipeline could have to our state residents and economy. With the continued operation of this pipeline, the risk of severe and lasting environmental damage to Michigan’s most important natural resource continues to grow every day.”

She called the court ruling a short-term fix, and said the pipeline eventually needs to be shut down permanently and removed.

“If the lines are put back into operation, one mismanaged incident or accident would result in a historic catastrophe for our state,” she said. “Work must continue toward complete removal of Line 5 from our waters.”

恩布里奇is "disappointed in the court’s ruling," and maintains that Line 5 is safe and is committed to protecting the environment and the Great Lakes while keeping energy flowing, said Vern Yu, an executive vice president.

He said the federal Pipeline and Hazardous Materials Safety Administration has regulatory oversight of pipeline operations and fitness for service, adding that Enbridge will provide the court with information it has requested relating to the agency's approach to assessing the current situation with Line 5, including restart planning for the west leg.

Yu said inspections have determined that the west segment is safe for operations and that the agency has not objected to restarting it,. He said the east leg was shut down pending a review of the damage and assessment of its fitness for service.

恩布里奇also contends an extended shutdown of Line 5 would threaten fuel supplies in Michigan and Ohio and result in gasoline supply shortages and cost increases,

Prior to the court’s ruling, Gov. Gretchen Whitmer [D] had sent letters to Enbridge CEO Al Monoco seeking more information about the damaged pipeline and requesting it be shut down immediately until the incident could be investigated and preventative measures put in place.

“The information I have received about this incident leaves many unanswered questions as to the cause of this damage, the catastrophe that may have been narrowly avoided, and the threats that may remain as a result of the damaged infrastructure,” Whitmer wrote. “That’s why I am requesting Enbridge turn over to the State of Michigan all relevant information about this most recent damage and provide affirmative evidence that establishes the integrity of the pipeline.”

Line 5 is set to be replaced by a utility tunnel under the straits large enough to accommodate trucks for service, a tunnel the Whitmer administration and Nessel challenged in court,but whose legality was affirmed by an appeals court6月17日。

That construction will not begin until at least this fall and is not expected to finish until 2024 at the earliest.