Take the adventure underground and paddle through the calm waters of the abandoned limestone mines hidden beneath the ...

On Wednesday evening, the U.S. Bureau of Land Management released a redacted copy of its long-awaited Determination of Common Variety report for the Rocky Mountain Industrials limestone mine, ...

A Clarion County-based company has received the go-ahead to construct an underground limestone mine in Deemston. The state Department of Environmental Protection on Jan. 21 approved a permit for ...

Residents and government leaders in the small western South Dakota city of Piedmont are in shock that the state approved a limestone mining operation without notifying them in advance about the ...

Residents who live near a proposed limestone mine in Deemston Borough raised a number of concerns about air quality, dust, and other issues at a public hearing Monday at the East Bethlehem Volunteer ...

Federal workers working in the limestone mine responsible for handling government retirements pushed back against Elon Musk’s claims of efficiency. Earlier this month, Musk told reporters inside the ...

BOYERS, Pa. — As you ride in a golf cart into the mouth of the Iron Mountain limestone mine, the temperature change is immediately noticeable. The natural climate control provided by the rough-hewn ...

Elon Musk drew attention to a decades-old converted underground limestone mine in Pennsylvania his Department of Government Efficiency (DOGE) team stumbled upon that is still being used to process ...