WATER POLLUTION: Smelting plant spills thousands of gallons of chemicals into Columbia River Published: Monday, February 3, 2014 A Canadian smelting plant has spilled thousands of gallons of chemical waste into the Columbia River, officials said. Please subscribe to Greenwire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.