There are several large high grade copper deposits that are easier to get at here is the US.
But the insane enviro wakos and the anti mining crowd have stop there development.
Minnesota has copper and a mining company is in the process of getting a permit to mine it. Its very close to the Boundry Waters area, however.
Upper Michigan still has copper reserves that could be developed.
This mine is in Arizona and the ore body is huge being a porphyry deposit below a previously mined our high grade ore body that was worked from about 1910 to 1982.