A joint venture of Mortenson Construction, Minneapolis, and McCarthy Holings Inc., Saint Louis, bested four other top contractor competitors to be construction manager for the National Bio and Agro-Defense Facility in Manhattan, Kan. The estimated $523-million lab, to be the new center of U.S. infectious disease research, is being constructed by the U.S. Dept. of Homeland Security. The CM award of $3.2 million was announced on Sept. 18. Firms also vying for the contract included a joint venture of Gilbane Building Co. and Turner Construction Co.; a JV of Bovis Lend Lease and Hunt Construction Group; a JV of PCL
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.