Image courtesy Rio Tinto Alcan Rio Tinto Alcan plans to build a new aluminum smelter in northwestern British Columbia. Montreal-based Rio Tinto Alcan’s plan to invest $2.5 billion in a new aluminum smelter in northwestern British Columbia has created a stir among engineering and construction contractors in the region. Last month, 300 local contractors attended a meeting in Vancouver, where plans to rebuild the existing Kitimat plant were presented.Built in the 1950s and powered by the nearby Kemano generating station, the Kitimat plant is undergoing $300 million of preliminary work this year. The work includes a contractor village, cleaning and
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.