The Eurasia Tunnel Project

Signature of the Final Acceptance Certificate marks the completion of the construction work.


On 27 February Italferr Altınok Joint Venture, as Employer’s Representative, together with the Client AYGM (The Turkish Infrastructure Ministry) and the Operator ATAŞ, signed the Final Acceptance Certificate for the Eurasia Tunnel, in effect terminating construction of this project.

This final phase began in December 2016 with signature of the Provisional Acceptance Certificate, which enabled the Eurasia Tunnel to be opened to vehicle traffic and for the one-year Defects Liability Period to begin, during which the project was monitored to detect any anomalies in the tunnel structures or the management and control systems. Upon positive conclusion of that phase, the Final Acceptance Certificate was signed.

The Eurasia Tunnel Project connects the Asian and European parts of Istanbul, with a total length of 14.6 km. Its construction proved particularly challenging because the above-ground part is partly located within the heavily built-up part of Istanbul. The below-surface section (5.4 km) that crosses below the Bosphorus was built under unique conditions that do not exist anywhere else in the world bearing in mind, amongst other things, the large diameter of the section excavated by TBM (13.71m), the seismicity of the area, the high pressures at the TBM front (up to 11 bar/106m below sea level) and the particular nature of the ground.

The professionalism of the Italferr staff, who were placed in key roles, successfully overcame the critical issues that were encountered at various stages of the construction, earning the praise and confidence of the Turkish Client.

Since January 2018 the Client has entrusted the support services for monitoring the operation of the Eurasia Tunnel, which will terminate in 2021, to Italferr Altınok JV.