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 ...

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 ...

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 ...