Canada's Claude Resources has been fined for leaking a potentially lethal substance into a waterway in Saskatchewan.
The company has pleaded guilty to three offences under Canada's Metal Mining Effluent Regulations of the Fisheries Act and has been ordered to pay $40,000 in fines.
The charges include depositing effluent containing high amounts of total suspended solids into a place where it may enter water frequented by fish and failing to report to an inspector without delay when monitoring tests have exceeded the prescribed limits.
The company is required to pay an additional $50,000 to the Saskatchewan Wildlife Federation, which is undertaking work to restore the environment.
The leak originated in a mine near Laonil Lake, about 125km northeast of La Ronge.