At 381 metres, the towering chimney is the second-tallest structure in Canada after the CN Tower
It’s also no longer in use. Built in 1970 and fully operational two years later, the smokestack was taken out of service in 2020 after the company cut sulphur dioxide emissions at the Copper Cliff Complex by 100,000 tonnes per year, in line with provincial limits. Now it’s coming down.
With just the concrete shell remaining, the plan is to dismantle the structure over a five-year period beginning in 2025. In the meantime, Vale’s much smaller Copperstack smokestack (just 137 metres tall), which is situated on the same site and has also been decommissioned, will be demolished.
The Superstack dismantling will take some 40,000 person-hours of labour, with as many as 35 workers on site during the operation.
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