As the consequences unfold of the Deepwater Horizon oil-rig explosion in the Gulf of Mexico, the flow of information has become as critical as the movement of the oil slick. One firm’s web-based information management system is having some success in crisis communication for those affected and is gaining wider play among infrastructure managers as an employee-management and business-continuity tool. Photo: U.S. Coast Guard U.S. Coast Guard was the first client of the PIER system. Related Links: Louisiana Starts Pushing Sand To Block Oil BP Considers Options To Plug Gusher, Investigates ‘Complex Accident’ BP Cleanup Subs Were Using Undocumented Workers
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.