Libya has embarked on an ambitious course to build an extensive rail system that will offer both passenger and freight service. The major east-west route will parallel the coast, ultimately stretching 2,300 km from Ras Ejder on the border of Tunisia to Umm Sa’ad on the border of Egypt. Separate contracts have been awarded to Russian and Chinese contractors to complete certain segments. Since 2008 RZD (Russian State Railway) crews have been building a 554-kilometer Surt-to-Benghazi segment, which involves four major stations and 24 minor stations. The project is expected to take four years at a cost of $3 billion.
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.