By starting work in late November on a $200-million upgrade of its central transmission system, Vancouver is making its first significant investment in the city’s power grid in 30 years. The project includes construction of an oversized three-story substation to meet future capacity needs and a tunnel beneath one of the city’s major waterways. Photo: Courtesy of BC Hydro Upgraded distribution center will take some capacity from three older stations. Marcel Reghelini, BC Hydro senior project manager, says the work is happening in Mount Pleasant, a fast-growing neighborhood no longer adequately served by three aging substations. “We’re putting in a
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.