The Globe and Mail reports in its Saturday edition that the Taku River and its tributaries meander throughout the territories of the Tlingit and the Tahltan peoples, and flow over the international border between British Columbia and Alaska. A triple-bylined item led by Francesca Fionda says that for the past 67 years a small, oozing sore has leached untreated heavy metals into the waterways. The abandoned Tulsequah Chief mine in B.C. sits on the Tulsequah River about 10 kilometres upstream from its confluence with the Taku River. Cominco, now part of Teck Resources, opened the copper, lead and zinc mine in 1951. Cominco closed it six years later. Several companies took it over in the intervening years, but none was successful at restarting production. Mr. Morris first saw the bright orange fluid, known as acid rock drainage, flowing out of a pipe when he was on a hunting trip in the late 1990s. For years environmental groups, indigenous communities and the Alaskan government have called on B.C. to start a proper cleanup. The mine's last owner, Chieftain Metals Inc., collapsed with high debts. Though it no longer owns Tulsequah Chief, Teck said it has voluntarily contributed more than $3-million in support since 2021.