Kiewit Infrastructure West Co. beat out six other bidders to win a $127-million design-build contract to construct Portland, Ore.’s first crossing of the Willamette River in more than 37 years. The 1,720-ft cable-stayed bridge with a 780-ft main span will carry only light rail, cyclists and pedestrians. The bridge is part of the $1.5-billion, 7.3-mile Orange Line project from Portland to neighboring Milwaukie, scheduled to open in 2015.
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.