France’s government has announced a $10.3-billion freight-railroad investment program that aims to take two million trucks off the roads a year by 2020 and reduce greenhouse-gas emissions by over two million tonnes. At the same time, the government has begun procuring four new high-speed passenger lines totaling 660 kilometers, three of them under public-private partnerships. France’s high-speed network is planned to double in size to 4,000 km by 2020.
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.