Canadian miner Hudbay Minerals marked a “major milestone” on Friday, when the US Army Corp of Engineers issued a Section 404 water permit for the Rosemont openpit copper project, in Arizona, but activists were quick to voice their opposition. TSX- and NYSE-listed Hudbay said that it expected to move the project into development following receipt of Rosemont’s mine plan of operations from the US Forest Service (USFS).