A new study published in a National Safety Council journal says that widely differing perceptions of safety helped conceal that an aggressive schedule, congested jobsite and lax safety enforcement may have created conditions that led to eight construction worker deaths at two big Las Vegas projects, City-Center and Cosmopolitan, between 2007 and 2008. Photo Courtesy Of CityCenter Land LLC The contractors say MGM Resorts owes $492 million for CityCenter. Perini Building Co., a unit of Sylmar, Calif.-based Tutor Perini Corp., is the general contractor for both projects. The study appeared in the most recent issue of the Journal of Safety
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.