"In 2010, Freeport-McMoRan had a total estimated impact of $2.1 billion to Arizona. Within our Southern Arizona counties, Freeport-McMoRan had a total estimated impact of $920 million in 2010," according to company spokesman Gabe Doak, in an interview published by Inside Tucson Business. Freeport operates 5 copper mines in Arizona.
Freeport is completing a study to add mining and milling capacity at Morenci, that would add "150 to 200 million pounds of incremental annual copper production within a two to three year time frame."
"Also under consideration are a further expansion at Morenci mine, expansions at Sierrita and Bagdad, and mining restarts at Twin Buttes and Ajo."