The construction of the Emma B open pit, which will expand the Tyrone Mine, will mean the rerouting of Tyrone-Thompson Canyon Road, according to Freeport-McMoRan officials who presented to members of the public at a meeting held Wednesday night at the Grant County Administration Building. In October 2021, Freeport-McMoRan submitted applications to the state for a new mine unit at Tyrone. Located on the southeast side of the Tyrone Mine, …