Underground mining operations involved four production ... and ultimate closure of the San Manuel mine site by 2003. Plant facilities and the smelter stacks were demolished in 2007.

In an underground mining setting, it is not as simple as ... while staff remain in the safety and relative comfort of surface ...

Subject to conditions, the transaction is expected to be completed in the December quarter of 2025, with MAC becoming a wholly owned subsidiary of Harmony.

The Environmental Protection Agency will allow Michigan Potash and Salt Company to inject salt water underground in Osceola ...

“December 6th is National Miners Day, and what better way to honor our local mining community than to learn about their profession firsthand? Our goal for this trip underground was to understand ...