Kennecott's permit applications for the Humboldt Mill face a public hearing in December.
The Department of Environmental Quality says the milling operation has a mining permit and an air use permit.
The public hearing on those is scheduled for December 1.
It'll be held from 4 to 10 p.m. at the Westwood High School auditorium in Ishpeming Township.
Kennecott plans to process the ore from the Eagle Mine at the western Marquette County facility.
The final decision on the permits is expected early next year.