Is it true that there is a substantial amount of copper under Lake Superior that could be mined?
As the spot price of copper increases, is it likely that this valuable ore will be mined? Is there a plant in the UP that could process the ore that may be mined? Will it be shipped by rail?

I believe I read that when the Mackinaw Bridge was designed, it included the possibility of rail? Is that true? Is it still possible to add rail to that bridge? Does the current government of Michigan have any plans to use the newly available federal funds to restore rail connections between the Upper and Lower peninsulas? That would be costly but there is a great need for economic development in Michigan. The Detroit area, Grand Rapids and Ann Arbor are likely to grow economically and in terms of population. But most of the rest of the state have rather bleak demographic and economic prospects. Could investments in the restoration of rail change that bleak outlook?
Thank you.