The mining industry scored a major victory in Minnesota Thursday, when the federal government lifted a controversial stay on minerals exploration in national forests just outside the Boundary Waters Canoe Area Wilderness.
The announcement fulfills promises President Donald Trump and Vice President Mike Pence made to Republican supporters at separate rallies in Duluth this year, an indication of how mining in Minnesota has become a national political issue.
The decision will open up hundreds of thousands of acres of federal forestlands in northern Minnesota to mining companies looking for copper, nickel and other metals — a step fiercely opposed by environmental advocates who had won the two-year stay in 2016.

At the same time, U.S. Agriculture Secretary Sonny Perdue, who oversees the U.S. Forest Service, halted a federal environmental review to determine whether hard-rock mining in the ecologically sensitive and water-rich area should be banned for 20 years. Such a ban would have given the BWCA environmental protections on a par with those granted to other national treasures such as the Grand Canyon and Yellowstone National Park.
Copper-nickel mining "might cause serious and irreparable harm to this unique, iconic and irreplaceable wilderness area," then-chief of the U.S. Forest Service Thomas Tidwell said when the review began.
But the ban would have put what some mining experts estimate is $500 billion worth of copper, nickel and other precious metals deposits off limits for two decades. The forests and lakes in that part of Minnesota lie above a geologic formation known as the Duluth Complex, one of the largest such untapped mineral resources in the world, which holds the promise of a new generation of mining in a region long known for taconite production.
Now, the Forest Service will allow mining exploration to resume just outside the BWCA on 234,000 acres of federal land in the Rainy River watershed.
"We must put our national forests to work for the taxpayers to support local economies and create jobs," Perdue said in a news release Thursday morning. "We can do these two things at once: protect the integrity of the watershed and contribute to economic growth and stronger communities."