One little snag with this, though, is that the fields in Penny are all independent. Anyone can mine them. Fields like the ones in Omega-7 are all corporation owned, if I remember correctly. Some people are hesitant to join corporations to mine when they can remain independent and still get pretty high profits from Pennsylvania.
I say we ought to take silver out of Pennsylvania entirely, and just leave it with the platinum around Tremont. There are a handful of other places to mine silver, anyway, so it's no big loss. And if people still want to mine silver, they can go elsewhere for it.