Hi Aaron,
I am from Monaca...which I am sure you heard of. I really have been wondering about that, and have read geology reports and such. There was gold found up in Mercer County I believe because it was brought in with the glaciers. You know Moraine state park and the gravels were all from those glaciers. They say the gold is fine.....but I never heard about SW...unless they call Butler in the SW but its not....
Leo