Burgundy Diamond Mines says it’s laid off some of its employees and contractors and has temporarily stopped open pit mining ...

A proposed open-pit copper mine in the Santa Rita Mountains would harm the area's ecosystem and views and threaten groundwater supplies and the tourism industry, county Supervisor Ray Carroll says.

SB306 would allow new open-pit mines, they said, going against the will of the voters. “What doesn’t the sponsor understand about the word ‘No?’ ” asked Rep. Virginia Court, D-Billings.

Two Alberta environmental groups are praising Premier Danielle Smith’s comments on banning open-pit mining, just days after the provincial energy regulator approved a coal exploration program ...