Federal agencies are not relying enough on each other’s contractor past-performance data in making new awards, due to the unreliability of the information or difficulty assessing its relevance, says a new study by the U.S. Government Accountability Office. The report, requested by Henry Waxman (D-Calif.), chairman of the House Energy and Commerce Committee, says even with the creation in 2002 of a governmentwide retrieval system for such data, its use is not widespread. It reviewed 62 fiscal 2007 and 2008 solicitations in the Depts. of Energy, Defense and Homeland Security, among oth- ers, and interviewed 121 contracting officials.
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.