The cause of yesterday's failure of a JLG boom lift on the site of the Kauffman Center for the Performing Arts, under construction in downtown Kansas City, Mo., is not yet clear, says Dan Euston, president of local general contractor J.E. Dunn Construction Co. Photo: Ed Sturga/AP An investigator photographs lift involved in fatal accident. Related Links: K.C. Lift Tips Philly Lift Victim Was Experienced Blog: Dissecting the Philly Lift Video: JLG's New Featherweight Lift "We're just in the beginning throes of the investigation," Euston told ENR on Nov. 11. The accident has project officials "scratching our heads," he says.
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.