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Eskay Creek Mine environmental effects monitoring program and its implications for closure planning

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dc.contributor.author McGurk, Michael
dc.contributor.author Landry, Francois
dc.contributor.author MacGillivray, Randy
dc.date.accessioned 2009-05-29T21:33:04Z
dc.date.available 2009-05-29T21:33:04Z
dc.date.issued 2006
dc.identifier.uri http://hdl.handle.net/2429/8496
dc.description.abstract Effluent from the Eskay Creek Mine constitutes 6 to 12% of the flow of Ketchum Creek – the immediate receiving environment. Hence, the Metal Mines Effluent Regulations required an Environmental Effects Monitoring Program to determine the effects of effluent of aquatic organisms. Sampling of benthic invertebrates in Ketchum Creek in September 2005 showed significantly higher family richness at an exposed station compared to a reference station, but no significant variation in average benthos density or species diversity. Benthos characteristics may be driven more by variation in physical habitat than by exposure to mine effluent. The naturally high metal concentrations of Ketchum Creek caused bioaccumulation of metals in Western Pearlshell mussels (Margaritifera falcata) in two stream-side mesocosms (reference and exposed) run from early August to late September 2005. Metal concentrations were higher in the exposed mussels than in reference mussels. However, survival was slightly higher at the exposed mesocosm and growth was zero for both mesocosms. The conclusion was that the ecological effects of mine effluent are low in magnitude and difficult to distinguish from natural effects. Therefore, current closure planning, which will maintain or lower the existing discharge rates, should be protective of the receiving environment in perpetuity. en
dc.format.extent 415031 bytes
dc.format.mimetype application/pdf
dc.language.iso eng en
dc.relation.ispartofseries British Columbia Mine Reclamation Symposium 2006 en
dc.title Eskay Creek Mine environmental effects monitoring program and its implications for closure planning en
dc.type text en
dc.type.text conference Paper en
dc.description.affiliation Applied Science, Faculty of en
dc.description.reviewstatus en
dc.rights.copyright British Columbia Technical and Research Committee on Reclamation en


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