Which mine is the subject of a major environmental cleanup project and is not located in Ontario, the Colomac Mine or the Big Dan Mine?
Colomac Mine: The Colomac Mine was a privately owned and operated open pit gold mine located 220 km northwest of Yellowknife in the Northwest Territories in Canada . Colomac Mine:  A major cleanup effort is under way to prevent the mine from polluting the environment, but this might be too late at this stage. Big Dan Mine: Big Dan Mine is an abandoned underground mine in Northeastern Ontario, Canada.
i don't know