If Trump imposes tariffs on copper imports, it could benefit domestic producers, including Freeport-McMoRan, which operates ...

Freeport is trying to develop technology that can burrow within those gigantic waste piles at Morenci and extract low-grade copper that miners previously saw as too expensive.

Turns out, Arizona’s moniker ‘The Copper State ... considering that the biggest copper mining operation in the state — the Morenci Mine — employs a little over 3,000.

The company runs five mines in Arizona and two in New Mexico. The Morenci mine southeast of Phoenix is the largest of those. The U.S. imports about half of its copper, with Freeport-McMoRan ...

from Morenci in Arizona. The town was built to house the mine’s workers and their families in the late 1800s, back when mules hauled crates of ore up the mine’s dusty slopes. And like much of ...