Related Links: Dramatic Digs Mark Panama Canal Expansion Progress A Shaky History in Panama Meeting the quality level called for in the Panama Canal's new locks while producing the massive volume of concrete required to finish the job by the expected fall 2014 completion date has called for extreme equipment solutions. For each primary process—batching, conveying and placing—the material is tightly controlled.The sheer volume of concrete—more than five million cubic meters—has to be built to meet the structures' projected century-long life span. As a result, the quality standards for the concrete are extremely high. The entire lock worksites on the
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.