For almost 100 years, the Soudan mine in Tower, Minn., yielded the purest iron ore in the country. Now University researchers will mine knowledge that could put them on the forefront of physics ...

In this video, we explore a vast and mysterious abandoned mine, where we stumble upon a breathtaking underground lake hidden beneath the surface. After hours of navigating through tunnels and chambers ...

San Manuel Mine was once the world’s largest underground copper mining operation ... former Ventilation Engineer for Magma Copper Co. Arizona State Freight Plan (ADOT MPD 085-14) prepared ...

The Conservation Fund, a national nonprofit, agreed to pay $60.1 million for 7,765 acres near the Okefenokee Swamp once ...

A conservation group says it will pay $60 million to buy land outside the Okefenokee Swamp from a mining company that spent ...

For 130 years, workers excavated vast wealth from the Mesabi Iron Range in northern Minnesota for big companies out East. Today, that could change. It might go west instead. An entrepreneur plans ...

A coalition of 16 environmental organizations formally challenged the federal government’s environmental review of the proposed South32 Hermosa mine project, citing critical flaws in the analysis.

Yavapai County has historically ranked number one in gold production in Arizona. Over half of its production has derived from the Congress-Yarnell-Stanton area. The nearby town of Stanton at the ...

BILLINGS — State regulators have given final approval to a 70-million ton expansion of a southeastern Montana coal mine that provides fuel to the Colstrip power plant. The state Department of ...

This spring, Urbaniak, who teaches drafting technology at the Montana State University ... know about Red Lodge’s mining past, many hadn’t realized how vast the underground mining complex ...

MISSOULA (LEE) -- Seven years after the Beal Mountain Mine near Anaconda shut its doors ... has picked up $4.2 million of that tab. The state picked up another $2.5 million.