Faro Mine Complex revegetation activities Carter, L.; Tobler, P.
In preparation for remediation and closure of the Faro Mine Complex (FMC) in central Yukon, significant work has been completed to develop and test revegetation methods at the mine site. Design and implementation of various revegetation field trials and strategies has been proceeding since 2007. This paper focuses on revegetation efforts and subsequent monitoring at two FMC sites: the Grum Overburden slope and Grum Sulphide Cell (GSC). Grum Overburden slope revegetation trials cover an area of approximately two hectares with surficial soil characterization similar to material to be used as a reclamation cover for the entire FMC. Different grass seed mixes were applied with and without fertilizer, and woody species (alder, willow, and poplar) were planted in the seeded plots. Five years of monitoring has demonstrated that revegetation success primarily depended on fertilization, while site preparation method heavily influenced erosion protection. Revegetation and site preparation at the 26 ha GSC was intended to provide ground cover for erosion protection and facilitate development of a long-term, self-sustaining ecological system integrated with the mine surroundings. Building on results from the Grum Overburden site, the 2012 revegetation prescriptions included hydroseeding, fertilization, planting of woody species, and testing of fertilization and hydration teabag-like packs. Results from the 2013 and 2014 monitoring programs provided preliminary insight on the success of the revegetation works at the GSC site. Collectively, these sites signify many of the reclamation challenges faced by development projects across northern Canada, including a short growing season, harsh climate, and nutrient poor soils. The need to address multiple objectives across various time scales provides many research opportunities.
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Attribution-NonCommercial-NoDerivs 2.5 Canada