Twin Metals offices in Ely, Minn. feature the periodic table names of elements the company plans to mine as seen here on June 12, 2019. Create an account or log in to save stories. Thanks for liking this story! We have added it to a list of your favorite stories. The U.S. Senate voted 50-49 Thursday morning to overturn a 20-year ban on mining near the Boundary Waters Canoe Area Wilderness. Rep. Pete Stauber, R-Minn., who represents northeastern Minnesota, introduced the legislation.