What is the length of the King Fahd Causeway, a series of bridges connecting Saudi Arabia and Bahrain?

The King Fahd Causeway is a series of bridges and causeways connecting Saudi Arabia and Bahrain. At 25 km (15.5 mi), the western terminus of the causeway is the al-Khour neighbourhood of Khobar, Saudi Arabia and the eastern terminus is Al Jasra, Bahrain.

The project cost a total of US$800 million. Al-Muhandis Nizar Kurdi Consulting Engineers was the sole Saudi partner of the consulting group (Saudi Danish Consultants) which completed the study, design and construction supervision of the Causeway.

One of the major contractors of the project was Ballast Nedam, based in the Netherlands. It is unclear how many workers were engaged in the construction of the Causeway. The four-lane road is 25 km (15.5 mi) long and approximately 23 m (75 ft) wide, and was built using 350,000 m3 (12,000,000 cu ft) of concrete along with 47,000 metric tonnes of reinforced steel.