On Aug. 4, more than a billion gallons of mining waste spilled into rivers and creeks from a tailings pond at Imperial Metals’ Mount Polley gold and copper mine at the headwaters of the Fraser River watershed in the interior of British Columbia. Indigenous First Nations peoples mostly populate this area. According to the Canadian Broadcasting Co., the volume of the spill would fill 2,000 Olympic-sized swimming pools. It is the largest mining disaster in Canadian history.
