Minnesota's first copper-nickel mine clears final major hurdle with state

Minnesota's first copper-nickel mine cleared its final hurdle with state regulators Thursday, while federal officials opened a path for a second mine just outside the Boundary Waters Canoe Area Wilderness.

Proponents hailed the decisions on the projects, the most significant in a generation for northern Minnesota, as key to reviving the state's struggling mining industry, adding jobs and providing an economic boost to the region and state. Opponents, however, assailed the decisions, saying the mines will jeopardize clean water and some of the state's most pristine wilderness areas.

Both sides are still waiting on a wetlands permit from the U.S. Army Corps of Engineers for the PolyMet Mining Corp. project.

While Thursday's actions by state and federal officials appear to open the door for copper-nickel mining, the fight may just be moving to the courtroom.

Early Thursday, the Minnesota Pollution Control Agency announced that it had approved final air and water permits for PolyMet's $1 billion mine and processing plant. Hours later, the U.S. Department of the Interior announced it will begin the process of renewing mineral leases for the proposed Twin Metals copper-nickel mine on the edge of the BWCA near Ely.

Both projects are highly controversial because copper-nickel mining poses greater environmental risks than the iron and taconite mining that have been part of the state's history. Copper-nickel operations produce sulfuric acid and generate heavy metals and other pollutants. This runoff, sometimes called "acid mine drainage," can contaminate lakes and streams.

Pete Stauber, newly elected congressman in Minnesota's Eighth District, said the state's review shows that PolyMet will meet or exceed every environmental standard and deserves to move forward.

He said he is convinced that those new opportunities won't be at the expense of the environment.

"We have the best environmental standards in the world," Stauber said. "This is where we live. This is our backyard, and it's our playground too. We don't want to damage or harm our environment."

But environmental groups have taken issue with the state's review of the PolyMet project, as well as the push to renew the mineral leases near the BWCA, challenging both in court. Last month they asked the state Court of Appeals to reject crucial permits that the Department of Natural Resources had approved. They'll review the MPCA permits and decide whether to file a court challenge to them. Earlier this year, they filed federal lawsuits challenging the Interior Department's authority to reinstate the Twin Metals leases.

The fact that the MPCA gave its go-ahead on the project the same day the Interior Department announced its decision on the leases was not lost on environmentalists, who have said that decisions on the PolyMet project will set standards for the next copper-nickel mine.

"The important lesson for Minnesota is that we can't make these decisions in isolation from one another," said Aaron Klemz, spokesman for the Minnesota Center for Environmental Advocacy. "If Twin Metals receives their leases, then the next stage is to apply for a permit. What we've seen is how weak and vague some of our rules are. It gives us a great deal of concern whether this industry can protect air and water in Minnesota, especially delicate ecosystems that haven't had any mining in the watershed."

"The Boundary Waters is our Yellowstone, our Grand Canyon," said Aaron Hebeisen, co-chair of the Minnesota chapter of Backcountry Hunters and Anglers. "Both from a scientific and economic point of view, it does not make sense to have a mine in that area."

Mining companies have long eyed the BWCA, which is next to one of the largest untapped deposits of precious metals in the world. Twin Metals Minnesota, a St. Paul-based subsidiary of the Chilean mining conglomerate Antofagasta PLC, has said that if its mining project is ultimately approved, it will build a 100-acre ore-processing facility on the banks of Birch Lake, whose waters flow north into the BWCA.

The decision by the Interior Department to renew the Twin Metals leases reverses a decision made in the closing weeks of the Obama administration and could open the door to a massive mining operation.

Becky Rom, who grew up in Ely and is chairwoman of the Campaign to Save the Boundary Waters, one of the environmental nonprofits fighting the Twin Metals project, said the decision runs counter to the popular will of Minnesotans. During a public comment period last year, more than 117,000 comments supported a ban on mining within the Boundary Waters watershed.

"They are saying to the public, 'We don't care what you think,' " Rom said. " 'We don't care what the science says and what the law says.' "

Gov. Mark Dayton lashed out at the Twin Metals decision, saying it was "driven by greed and willful ignorance" in the Trump administration. "The Boundary Waters Canoe Area is a priceless, irreplaceable environmental asset for our state and nation that must be protected," he said. "Endangering its pristine waters and natural wonders for the sake of foreign corporate profits is shameful and wrong."

Still, any mining at the Birch Lake site might be years away. Twin Metals has yet to submit a formal mining plan, which would have to go through an extensive environmental review.