British Columbia Mine Reclamation Symposium

Mount Washington Mine remediation project - construction phase White, Wayne; Tong, Alvin


After a very short history of mining (1964 to 1966), the Mount Washington copper mine has been a major source of acid rock drainage entering the Tsolum River near Courtenay, BC. Previous remediation projects have been partially successful at controlling the ARD generation at the site and treating the copper bearing discharge from the site (Pyrrhotite Creek). The current project includes placement of a bituminous liner over the North Pit, covering the liner with soil for revegetation, improvement of the surface water diversions and, if necessary, treatment of the drainage from under the cover while groundwater recovers. The Ministry of Energy, Mines and Petroleum Resources retained Quantum Environmental, SRK Consultants (Canada) Inc and Stantec to carry out the work. The Tsolum River Partnership, a coalition of community, industry and government were also involved in the planning and implementation of this project The project is ongoing. Site preparation, liner installation and partial placement of the soil cover were completed during the summer of 2009. The placement of the remaining soil cover on top of the liner and revegetation of the site will be completed during the summer of 2010. Post-construction monitoring will be conducted by the Tsolum River Restoration Society and the Ministry of Environment for at least two years to determine if lime treatment will be required.

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