The Panama Canal Authority awarded the contract to design a bridge on the Atlantic side of the Panama Canal near the Gatun Locks to a Chinese-U.S. joint venture. The China Communications Construction Co. and the Louis Berger Group offered a $4.66-million proposal, the lowest bid offered. The structure will be 75 meters above sea level and 5 km long, including the approaches. The other firms proffering bids included TYPSA Principia, URS Holdings, Puente de Colón JV, ARUP and T.Y. Lin International.The bridge is required to maintain a road passage across the isthmus with the construction of the new larger locks
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.