Imperial Metals was a miner in best-practices process at time of breach

Mining Association of Canada president Pierre Gratton said Imperial Metals was in the second year of the association's three-year Towards Sustainable Mining (TSM) certification program. The third year, which Imperial Metals had not yet completed, requires an external audit of the company's management and safety systems.
"TSM has its roots in tailings failures that took place in the 1990s," Gratton said. "The primary reason for those failures was not engineering design, but overall management of the facilities. With tailings being one of the industry's biggest risks, it was felt that [oversight] for tailings was not at the level it should be. What was found is that it wasn't making its way to the top, it was being managed at a local level."
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