December 4, 2025 — Reports of mine tailings dams leaching toxicants into salmon-rich transboundary waterways flowing into Southeast Alaska are raising concerns of fishermen, tribes, First Nations, and communities on both sides of the Alaska-British Columbia border.
According to Salmon Beyond Borders and the Alaska Longline Fishermen’s Association (ALFA) the administration of Alaska Gov. Mike Dunleavy has put the risk of transboundary mining contamination of shared rivers at greater risk a decade after the Alaska and government of British Columbia signed a Memorandum of Understanding about Canadian mining on these transboundary rivers flowing into Alaska.
“For eight years the Dunleavy administration has allowed ongoing and new pollution from B.C. transboundary mines to go unaddressed and for B.C. to skirt accountability for commitments outlined in state-provincial agreements,” said Breanna Walker, director of Salmon Beyond Borders, in a statement issued on Nov. 25.
“Alaska’s fisheries are increasingly at risk from British Columbia’s transboundary mines,” said Linda Behnken, executive director of ALFA. “We rely on both state and federal governments to negotiate meaningful protection for Alaska waterways and fisheries. In the absence of meaningful action our fish, fisheries and fishing communities are vulnerable.”
State of Alaska officials say they are in fact very engaged with British Columbia through the Transboundary Bilateral Working Group. Sam Dapcevich, special assistant to the DEC commissioner, said in an email on Nov. 26 that “Alaska also continues to advocate for cleanup of the Tulsequah Chief mine. DEC is fully engaged and working with our B.C. counterparts on activity awareness and status of projects,” he said.