Tight credit, a glut of inventory and a sluggish economy overshadowed the early hours of this year’s World of Concrete show in Las Vegas, which opened on Feb. 2. Although official registration numbers were not available at press time, attendance throughout the week was expected to drop slightly from last year’s roughly 65,000 attendees. Exhibitors noticeably trimmed down their booth space yet were in aggressive selling form, hopeful they would post small revenue gains this year. Showgoers said they expected federal stimulus, leftover from 2009’s package, to prop up public works during the second half of 2010 but felt the
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.