Studies and field tests are conducted in order to select a strategy to reuse mine waste to restore the site, rather than use natural material, like clay, sand, and gravel, brought in from outside.

Construction of cells to test the efficacy of four possible coverage options were finalized in December 2020. The cells include an organic layer for vegetation, a key aspect of erosion and moisture control.

Performance data were collected from the test cells in 2021 and will be collected over the coming years. They will guide decisions on the ground cover plants that will eventually be planted over the entire tailings pond.

On December 31, 2021, the Government of Quebec held $165.1 M in trust to ensure the safe and timely closure of the Canadian Malartic mine site once mine operations have ceased. An updated Restoration Plan, filed in December 2020, was still being analyzed in 2021.

The Odyssey Mine site’s restoration plan was approved on September 3, 2021, and slightly more than $13 M is held in trust to cover restoration costs for the entire site.