Between 1948 and 2004, operations at the Giant Mine site grew to encompass roughly 900 hectares, including several ponds and small lakes. In 1999, the former operator entered receivership and the Government of Canada, and the Government of Northwest Territories became responsible for the site. Mining operations continued until 2004. Several environmental and site remediation needs were identified. This included cleaning up the 237,000 tonnes of arsenic trioxide dust left behind in underground chambers and 16 million tonnes of tailings, open pits, debris, and site infrastructure. Today, the project’s goals are to: minimize public health and safety risks; minimize the release of contaminants from the site to the surrounding environment; remediate the site in a manner that instills public confidence; and implement a remediation approach that is cost-effective and robust.
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