April 10, 2020
A Minnesota federal court will let a mine owner, several other mining companies and a mitigation credit bank intervene in an environmental lawsuit challenging the U.S. Army Corps of Engineers' decision to give a Clean Water Act permit to a planned open-pit copper sulfide mine.
September 11, 2019
Environmental groups have challenged the U.S. Army Corps of Engineers' decision to give a Clean Water Act permit to a planned open-pit copper sulfide mine and plant in Minnesota, arguing efforts to protect wetlands were improperly changed at the last minute.