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Cleaning up after Canada's largest tailings pond leak

from Maclean's

Uprooted trees, muddied water with a silvery sheen, fish belly-up on the surface. There was something essentially un-Canadian about the first galling photos to emerge out of Mount Polley, British Columbia, where a copper and gold mine's tailings pond — a containment area where the waste produced through the mining process is treated and allowed to dry before being disposed — burst through its earthen walls. All told, 10 million cubic meters of water contaminated with arsenic and mercury and 4.5 million cubic meters of tiny silt silicates spilled into Hazeltine Creek and Quesnel Lake. more


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