Freeport-McMoRan CEO Richard Adkerson said on Monday his company has been investing heavily to mitigate any danger from tailings dams and is "comfortable" with engineering designs in place at existing dams.
"Early on, we recognized this as a major risk area for our company," Adkerson said at an industry conference in Florida. "Fundamentally, we’re comfortable with the system that we have been putting in place in managing this risk."