Tunnels Other References
Client Duration of Services Project Name Scope of Services
Taisei / Gama / Nurol Joint Venture
2004-2012
Railway Bosphorus Tube Crossing (Marmaray Project)
Cut and cover tunnels from Km 0+300 to km 4+080 and km 13+420 and km 13+860 including bored-tunnel portals
General Directorate of State Railways, Ports and Airports (DLH)
2004- 2006
Ankara – İzmir Railway
Final Design
13 nos rail tunnels
General Directorate of Highways
1998- 2005
Samsun Western Bypass Road
Final Design
1,01 km twin-bore tunnel
General Directorate of Highways
1998- 2003
Ankara – Kastamonu Highway Ilgaz Mountain Tunnel Crossing
Preliminary and Final Design
4,38 km long, 8.00 m wide single-bore tunnel
General Directorate of Highways
1996- 2001
Mengen – Devrek Highway Dorukhan Tunnel
Preliminary and Final Design
1,02 km-long highway tunnel
