There are multiple levels that eventually lead downto the coal mine chambers. It is unlikely, Parent said, that public access will be permitted in the old coal mines.

“Upper Peninsula-wide there are numerous underground mines that could possibly utilize that pumped storage hydro technology and that would provide more energy security for the Upper Peninsula ...

Fun in the dark also has given a few old mines new life as underground tourist destinations, from a limestone mine in western Pennsylvania now crisscrossed with ATV trails 250 feet below ground ...

These old mines, which will never return coal to the surface again, are now producing another resource that, ironically, can help us emit less carbon, not more: geothermal heat.

Investigators also searched old mines in Utah and neighboring Nevada after the high-profile 2009 disappearance of Susan Cox Powell, though the 28-year-old Salt Lake City-area wife and mother was ...

Underneath the mountains and deserts of the U.S. West lie hundreds of thousands of abandoned mines, an underground world that can hold serious danger and unexpected wonder.

Officials believe a sinkhole that opened in the front yard of a Des Moines home Wednesday may be due to an old coal mine under the neighborhood.It's brought up the question for many homeowners of ...

EUREKA, Utah — Underneath the mountains and deserts of the U.S. West lie hundreds of thousands of abandoned mines, an underground world that can hold serious danger and unexpected wonder.

FRENCH GULCH, Colo. - More than a century ago, this wild stretch of mountain and rock was one of the richest mining areas on earth.

In 2016, Alcoa put the former coal mine and its adjoining industrial facilities on the market with a new name — Sandow Lakes Ranch — and a hefty price tag of $250 million.