Sharq Crossing

Project Description

Conceived by world renowned Architect and Engineer Santiago Calatrava on behalf of the State of Qatar’s Public Works Authority Ashghal, the unique 21st century bridge-tunnel connection across Doha Bay comprises three bridges, two immersed tunnels with a total length of approx. 6 km and three cut-and-cover tunnels.

This is one of the most iconic and prestigious bridge-tunnel connections TEC has been commissioned to work on to date, and the first ever immersed tunnel project in the Middle East region. Of particular interest is the Marine Interchange as a complex underground interchange, connecting the two immersed tunnels and the West Bay bridge. Also, the West Bay bridge will have the world’s largest arch span connecting the shore with the Marine Interchange.

Scope of Work

TEC prepared the validated Concept Design (preliminary design level) of the two immersed tunnels of 3.1 and 2.8 km, the three cut-and-cover tunnels with a length of approx. 950-1250 m each connecting the bridges to the mainland and the Marine Interchange of approx. 600 m, connecting the two immersed tunnels and one of the bridges. The assignment also included the design of bridge foundations, roads, utilities, mechanical, electrical and plumbing (MEP) systems, the integral safety concept including ventilation and the preparation of a construction schedule and budget.

Specification sheet 2 page(s) - 291 kB


Calatrava Mideast LLC

In co-operation with

HBI Haerter Ltd., Zurich (CH) and Geotechnical Consulting Group (GCG), London (UK)

Type of project

Immersed Tunnels





Project duration


Project phase

Concept / preliminary design

Construction cost

Not disclosed

Consultancy fee

Approx. € 16 million