Colombia has awarded the first two contracts for the $2.6-billion, 1,000-kilometer Ruta del Sol highway project. The largest such road effort ever undertaken in the South American country, the project will connect the capitol city Bogota and the Caribbean coast. + Image Map: Sue Pearsall The 1,000-km tollroad will link Bogota to the Atlantic Coast. In January, Colombia’s National Dept. of Planning and National Institute of Concessions (INCO) awarded the seven-year, $660-million contract to Helios Road Consortium, led by Colombian construction firm Grupo Solarte, to construct and operate the toll road. The group also includes Colombian construction firm Conconcreto and
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.