The companies, which bargain collectively under the country’s Chamber of Mines, are already battling low metal prices and mounting electricity costs amid power outages.
The company will hear by June 30 whether it will be allowed to mine polyhalite, a type of potash fertilizer, from a deposit located under Brittan’s North York Moors national park.
Teck is facing sanctions over infractions that include openings in the deposit where the ore is stored and a failure to build sufficient water infrastructure.