Petersburg Pilot -

WRANGELL — On Sunday Alaska Native and Canadian First Nations groups will mark the first anniversary of the Mount Polley tailings dam collapse in a ceremony on the Stikine River.

On Aug. 4, 2014, a rupture in the tailings dam servicing the British Columbia mine released billions of gallons of metals-tainted effluent into waters that fed into the salmon-rich Fraser River system.

Earlier this month the mine’s owner, Imperial Metals, received a restricted permit from the provincial government allowing it to reopen Mt. Polley, using an alternate tailings operation. The company expects prod...