The Pinchi Lake Mercury Mine operated from 1940 - 1945 and 1968 - 1975. It has remained on care and maintenance until Teck with support from MEA finalized a closure plan in 2009. Developing the Closure Plan for the Pinchi Mine required MEA’s expertise in the following areas:
An Acid Rock Drainage assessment was conducted to establish the potential for ARD from the existing waste rock dumps and tailings;
A Metal Leaching (ML) assessment was carried out to determine the potential magnitude of metal leaching from the underground workings, waste rock dump seepage and tailings impoundment with and without any water cover;
MEA helped secure permits to de-water the tailings pond and landfill the demolition debris and is providing decommissioning support while the site is undergoing active closure works.
Closure Planning