Teck Resources admits polluting Columbia River in U.S.
By Gordon Hoekstra, Vancouver Sun, Canadian Press September 11, 2012

The zinc, lead and silver smelter of Vancouver-based diversified miner, Teck Resources Ltd., the world's largest zinc producer, Wednesday, August 2, 2006, in Trail, British Columbia, Canada.
Photograph by: UDO WEITZ, Vancouver Sun
Teck Resources has admitted that mining waste and effluent from its Trail smelter polluted the Columbia River across the U.S.-Canada border in Washington State for 100 years.