1.   Another Arizona mine produces more waste than Oregon, Iowa and Oklahoma combined.

2.   Even so, copper mines should produce a surplus later this year as new projects deliver enough metal to outpace demand, analysts said.

3.   The mines now produce more coal than ever, but with mechanization they need fewer workers with more training.

4.   The mines produce primarily steam coal used to generate electrical power.

5.   The mine would produce ores and wastes laced with sulfides.

6.   The mine will also produce silver and lead.

7.   The Vanderbilt mine produces talc used in most crayons manufactured in the United States.