The contractor in the December 2007 collapse of a Jacksonville, Fla., parking garage during construction is claiming exoneration by the Occupational Safety and Health Administration for responsibility in the catastrophe. A laborer died, and 23 other workers were injured. But OSHA insists that the case remains open, despite the agency’s formal settlement with the contractor. Photo: Jacksonville Fire and Rescue Dept. Garage-collapse case still open. In June 2008, OSHA concluded its investigation into the collapse of the Berkman Plaza II parking structure and proposed penalties totaling $192,800 against Choate Construction Co., Atlanta, the general contractor; Southern Pan Services, Lithonia, Ga.,
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.