The Army Corps of Engineers did not comply with requirements last April in a $675-million design-build contract award for New Orleans flood defenses, the U.S. Government Accountability Office ruled on Aug. 4 in a bid protest decision.CBY Design Builders, a team led by CDM, Cambridge, Mass., won the contract for the so-called Permanent Canal Closures and Pump stations project, set to finish in 2014. GAO upheld protests by a Kiewit Corp.-led team and Bechtel Infrastructure Corp. GAO did not release its ruling or even a version redacting competitive details by ENR press time on Aug. 8. In a statement, it
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.