These are before and after aerial views of the former orphan mine tailings of Québec Copper Mines in Québec’s Eastern Townships. The 6 hectare area of accumulated acid generating mine residue was permanently remediated by GSI Environnement over a period of three years (2002-2004) without incurring any cost to the client.  Mining residues were first neutralized with alcaline by-products and a low permeability membrane made of compacted deinking residue was installed. Unsorted till was then placed on top of the membrane as a protective layer, and compost was mixed with the till as an amendment and support for grass species implanted the first year after completion. Various shallow root tree species were planted the second year.  (Photo courtesy GSI Environnement, Sherbrooke, Québec)

updated:  November 24, 2005