Since the B.C. Mount Polley mine accident is being used as the basis to stop all mining, here and in Canada, here are the facts. Gold and copper were discovered along the shores of Polley Lake in eastern B.C. in the late 1800s. The lake is a narrow, shallow-water trout lake. The miners raised its water level in the early 1900s and began using water cannons to erode the gold deposits. Later they used hard…