TAMARACK — A company hoping to build an underground nickel mine in Aitkin County has submitted its plan to state regulators, kicking off a years-long environmental review and permitting process. In ...

"It's a great opportunity to truly dig in and solve what hasn't been solved for 100 years," said Jeff Graves, director of the program. Stuck between a rich past and uncertain future, Colorado’s ...

Decades after underground coal mining all but ended in Eastern Pennsylvania, residents of certain areas continue today to face a hidden danger: mine subsidence. Gaping holes sometimes open without ...