Two of three Georgia firms cited by the U.S. Dept. of Labor in a fatal pedestrian bridge collapse in Atlanta last December will contest the citations. Hardin Construction Co., Atlanta, Williams Erection Co., Smyrna, and Southeast Access, Kennesaw, were fined a total of $26,250 for the collapse of the 600-ft-long, 40-ft-tall bridge that was under construction at the Atlanta Botanical Gardens. One worker died and 17 were injured as a result. According to the U.S. Occupational Safety and Health Administration, Hardin and Williams Erection were cited for inadequate formwork design, fabrication, erection, support and bracing.
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.