An open-pit mining boom is underway in northern British Columbia, Canada. The massive size and location of the mines—at the headwaters of major salmon rivers that flow across the border into Alaska—has Alaskans concerned over pollution risks posed to their multi-billion dollar fishing and tourism industries. These concerns were heightened with the August 4, 2014 catastrophic tailings dam failure at nearby Mount Polley Mine in B.C.’s Fraser River watershed.

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