The scale is astonishing: nearly 100 trucks, each one carrying 320 tons (640,000 pounds) of ore, running 24 hours a day, 365 days a year. The trucks crawl along at 10 to 15 mph, carrying ...

From a viewpoint at about 6,190 feet above sea level, a giant hole in the Oquirrh Mountains stretches two and a half miles wide and ¾ of a mile deep. Trucks with tires bigger than a sedan look like ...

But any open-pit mine is going to have a huge impact, said Carroll, who has fought this battle before. The Republican supervisor helped fight a proposal by Asarco to mine the Rosemont in the mid-1990s ...