Argentina has completed a $314-million, 37.7-km natural-gas pipeline across the Strait of Magellan. The 24-in. (61-cm) undersea gas pipeline links Cabo Espiritu Santo in Tierra del Fuego province with Cabo Vírgenes in Santa Cruz province. Government officials say the new line, built by a consortium of Royal Boskalis Westminster and Allseas Group, will begin transporting 5.5 million cu m per day in June, with an additional 2 million cu m per day coming on line in early 2011. Previously, the gas fields in Argentina’s remote south only were connected to the mainland gas network via the San Martin pipeline, which
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.