Photo: Courtesy of Oregon Sustainability Center Oregon Sustainability Center’s planned height is at least 70 ft. Related Links: International Living Building Institute Construction is scheduled to begin in about a year and be finished 18 months later on a planned 70 to 100-ft-tall net-zero-energy use building in Portland that would, if completed, rank as the tallest net-zero-energy-use building in the U.S. The team for the $40-million Oregon Sustainability Center, which includes SERA Architects, GBD Architects and general contractor Skanska USA, is beginning a 12-week feasibility phase. Design should start in February. The seven-to-nine-story structure would be the tallest ever proposed
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.