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Dam Burst Threatens Canada Projects Seeking Approval

A dam failure that sent billions of gallons of mine waste flowing down a British Columbia creek threatens to put a chill on new mining projects across Canada.

The Aug. 4 accident at Imperial Metals Corp.’s Mount Polley copper-and-gold mine led the local district authority to declare a state of emergency amid concerns about drinking water and the fate of millions of migrating salmon. Provincial government officials are at the mine, about 400 kilometers (248 miles) northeast of Vancouver, and are testing local rivers and lakes for contamination.