Minnesota - Mining

摘要

State and Federal Regulatory Developments Impact Hardrock Mining in Minnesota Minnesota has long been known as the leading iron ore mining state in the United States, with mining dating back to the 1880s. The iron ore mines and taconite processing facilities in northeastern Minnesota typically produce 75% or more of total U.S. iron ore production annually. In recent years, this mining landscape has expanded further as several exploration and development projects have progressed for copper, nickel, gold, and other nonferrous metallic minerals.