A joint U.S.-European group has presented the low bid to analyze the options for a vehicular crossing at the Atlantic entrance of the Panama Canal, officials said on Monday. Photo: C.J. Schexnayder The Third Lane Expansion project will be built roughly at the site of a previous excavation by the U.S. Army Corps of Engineers, visible to the left of the Gatun Locks. San Francisco-based URS Corp. and the Danish firm COWI A/S submitted a bid of $895,000—the lowest of five tendered—to examine the possibilities of a permanent crossing at the historic waterway’s Atlantic entrance that will allow uninterrupted traffic
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.