The gold mining at the Kumtor site produces massive quantities of waste. About 89 million tons of toxic tailings till the end of 2010 are stored in this tailings pond. One of the main problems with this dam is that it has become unstable and is slowly moving downhill with its shape deforming. The report of Dr. Robert Moran gives the following explanation for it`s instability:
“This instability is due partly to the factors discussed above, but is likely enhanced by the relatively high temperatures of the tailings when they come from the process plant (a highly contaminated mix of about 50% solids, 50% liquids) which would increase permafrost melting. Such deformation and movement of the tailings structure, combined with the partial melting of the permafrost raises concerns about a catastrophic failure of the tailings impoundment — especially if a severe earthquake were to occur.”
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