Environmental and Indigenous activists celebrated Friday after Democratic Michigan Gov. Gretchen Whitmer took action to shut down the decades-old Enbridge Line 5 oil and natural gas pipelines that run under the Straits of Mackinac, narrow waterways that connect Lake Huron and Lake Michigan—two of the Great Lakes.Citing the threat to the Great Lakes as well as \u0022persistent and incurable violations\u0022 by Enbridge, Whitmer and Michigan Department of Natural Resources (DNR) Director Dan Eichinger informed the Canadian fossil fuel giant that a 1953 easement allowing it to operate the pipelines is being revoked and terminated.The move, which Michigan Attorney General Dana Nessel asked the Ingham County Circuit Court to validate, gives Enbridge until May 2021 to stop operating the twin pipelines, \u0022allowing for an orderly transition that protects Michigan\u0026#039;s energy needs over the coming months,\u0022 according to a statement from the governor\u0026#039;s office.This is a really, really big deal. (And for backstory, read this: https://t.co/cYjdHLSbZ7) #climatechange #humanityfirst https://t.co/95qTenr1Vj— Matt Villano (@mattvillano) November 13, 2020The Great Lakes collectively contain about a fifth of the world\u0026#039;s surface fresh water. As Whitmer explained Friday, \u0022Here in Michigan, the Great Lakes define our borders, but they also define who we are as people.\u0022\u0022Enbridge has routinely refused to take action to protect our Great Lakes and the millions of Americans who depend on them for clean drinking water and good jobs,\u0022 the governor said. \u0022They have repeatedly violated the terms of the 1953 easement by ignoring structural problems that put our Great Lakes and our families at risk.\u0022\u0022Most importantly, Enbridge has imposed on the people of Michigan an unacceptable risk of a catastrophic oil spill in the Great Lakes that could devastate our economy and way of life,\u0022 she added. \u0022That\u0026#039;s why we\u0026#039;re taking action now, and why I will continue to hold accountable anyone who threatens our Great Lakes and fresh water.\u0022MLive noted that the state attorney general\u0026#039;s new filing \u0022is in addition to Nessel\u0026#039;s lawsuit filed in 2019 seeking the shutdown of Line 5, which remains pending in the same court.\u0022 Nessel said Friday that Whitmer and Eichinger \u0022are making another clear statement that Line 5 poses a great risk to our state, and it must be removed from our public waterways.\u0022The \u0022bombshell news,\u0022 as one Michigan reporter called it, elicited applause from environmentalists and Indigenous leaders within and beyond the state.\u0022This is a brave and just decision for the Great Lakes,\u0022 Mike Shriberg, the National Wildlife Federation\u0026#039;s regional executive director for the Great Lakes, told MLive. \u0022It\u0026#039;s going to benefit the Great Lakes by removing what is probably the single biggest threat to water quality in the region.\u0022As the Detroit Free Press detailed Friday:Enbridge was responsible for one of the largest inland oil spills in U.S. history—a major leak on one of its large oil transmission lines near Marshall in July 2010. That spill fouled more than 38 miles of the Kalamazoo River and took four years and more than $1 billion to clean up. Enbridge in 2016 agreed to a $177-million settlement with the U.S. Justice Department and Environmental Protection Agency, including $62 million in penalties, over the Marshall spill and a 2010 spill on another of its pipelines in Romeoville, Illinois.A similar spill disaster on Line 5 in the Straits would devastate the Great Lakes shoreline communities and the Michigan economy, critics of the pipeline have long contended. Enbridge officials have countered that Line 5 is safe.\u0022Line 5 should have never been built in the first place,\u0022 Shriberg told the Free Press. \u0022Gov. Whitmer is now bravely, and correctly, standing up for the Great Lakes.\u0022\u0022This is a legacy-defining action by the governor,\u0022 he added. \u0022She is standing on the side not only of clean water, but clean energy and the jobs that go along with the transition to a renewable energy economy.\u0022Dallas Goldtooth, Keep It In The Ground Campaign organizer for the Indigenous Environmental Network, welcomed the \u0022huge news\u0022 in a series of tweets that acknowledged the years of campaigning by tribal nations against the Line 5:HUGE NEWS: Michigan @GovWhitmer has just moved to terminate and revoke easement for @Enbridge to operate its Line 5 pipeline on the bed of the Great Lakes in North Michigan!!!!!— Dallas Goldtooth (@dallasgoldtooth) November 13, 2020I give a TREMENDOUS AMOUNT of love to the tribal nations who have been fighting to protect the Great Lakes for years from @Enbridge Line 5!— Dallas Goldtooth (@dallasgoldtooth) November 13, 2020\u0022We are thrilled and thankful for Gov. Whitmer\u0026#039;s decision to revoke the easement for Enbridge\u0026#039;s pipeline to run beneath the Straits,\u0022 Bryan Newland, president of the Bay Mills Indian Community, said in a statement from Earthjustice. \u0022Enbridge has consistently shown that it only cares about its profits and not about the communities of the Great Lakes. This is a monumental first step in rectifying the harm that the company has already inflicted upon Bay Mills and other tribal nations for decades.\u0022The shutdown notice is \u0022an enormous victory for the climate, and for incredible organizers who have fought for many years!\u0022 declared activist and author Bill McKibben, who co-founded 350.org. After thanking both Whitmer and \u0022the indefatigable organizers,\u0022 he added that \u0022it\u0026#039;s not often enough we Shut Stuff Down!\u0022Sen. Gary Peters (D-Mich.) also welcomed the development in a statement Friday. Peters, who secured a narrow reelection victory last week, is a member of the Senate Commerce, Science, and Transportation Committee, which oversees the federal agency responsible for pipeline safety.\u0022There\u0026#039;s no question an oil spill in the Straits of Mackinac would have catastrophic and long-term consequences to the economic and environmental health of Michigan and the Great Lakes,\u0022 Peters said. \u0022Unfortunately here in Michigan, we already know from the Enbridge pipeline leak in the Kalamazoo River just how devastating and costly spills are to our state.\u0022\u0022Given the structural integrity and age concerns around Line 5—particularly in recent years—and Enbridge\u0026#039;s failures and inability to be transparent with Michiganders, it\u0026#039;s clear that Line 5 poses too serious of a threat and must be removed in the coming months,\u0022 the congressman continued, vowing to work with the Pipeline and Hazardous Materials Safety Administration (PHMSA) and the State of Michigan \u0022to swiftly evaluate alternatives to Line 5 while continuing to hold Enbridge accountable.\u0022This post has been updated with comment from Bryan Newland, president of the Bay Mills Indian Community.