Prequalification documents went out this month for the construction of the Bosphorus rail tunnel, in Turkey, following approval of the tender documents by the scheme’s financier, the Japan Bank for International Co-operation (JBIC).

The 13km long tunnel forms part of a wider scheme called the Marmaray Project – a 76km long upgrade to the rail link across Istanbul, connecting the European and Asian sides of the city.

The estimated US$2bn design and build contract involves the construction of a 1.8km long immersed tunnel across the Bosphorus Strait in the Marmaray sea, and about 11km of bored and cut and cover tunnels on both sides.

More details in July’s T&TI