British Columbia will move forward with the development of a new, 900-MW, $6.6-billion hydroelectric project on the Peace River in the province’s eastern section, Premier Gordon Campbell announced on April 19. As currently designed, the earthfill Site C dam would be 1,100 meters long, with 300 meters of concrete structures located on the right bank for the spillway and power intakes. The Sierra Club of British Columbia criticized the decision on the dam, calling it an “ill-advised” mega-project that fails to meet minimum international standards for large dam construction.
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.