King Fahd Causeway
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The King Fahd Causeway (Arabic: جسر الملك فهد) is the combined bridge-viaduct connection between Khobar, Saudi Arabia, and the island nation of Bahrain
A construction agreement signed on July 8, 1981 led to construction beginning the next year. The cornerstone was laid on November 11, 1982 by King Fahd of Saudi Arabia and Sheikh Isa bin Salman al-Khalifa of Bahrain and went until 1986, when the combination of several bridges and dams was completed. The causeway officially opened for use on November 25, 1986.
The project, completely financed by Saudi Arabian money, cost a total of US$1.2 billion and was contracted out to the Ballast Nedam Group based in the Netherlands. The four-lane road (25 metres (82 ft)) is 25–26 kilometres (15½-16 mi) long and used 350,000 cubic metres (460,000 yd³) of concrete along with 147,000 metric tons of reinforced steel. The causeway consists of two parts, a long bridge from Khobar to Umm al-Na'san island in Bahrain, and a shorter one from Umm al-Na'san island to the main island of Bahrain.