Resolution Copper Mine — 7,000 feet underground

Resolution Copper Mine — 7,000 feet underground

Resolution Copper Mining spent six years and $540 million building shaft No. 10, the longest single-lift, or continuous, shaft in the country. Supporters say the project will revive Superior’s lagging economy, but not everyone thinks the benefits are worth the environmental damage. Resolution is a subsidiary of mining giants Rio Tinto Group and BHP Billiton Ltd.