Turkey Ministry of Transport and Communications Planned third bridge across the Bosporus still awaits bids. Turkey Ministry of Transport and Communications Another Turkish bridge will be world's fourth-longest suspension crossing. Seeking to whet the weak appetite among contractors and banks for a $6-billion build-operate-transfer scheme to construct a third crossing over the Bosporus, Turkey's government has divided the project into two and rescheduled the bridge tender for April 5, 2012. Located to the north of Istanbul, the 1,275-meter-long suspension bridge and 90 kilometers of linking motorways are valued at around $2.6 billion. The remaining 340 km of connecting highways to
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.