The Channel Tunnel was built using 11 tunnel boring machines (TBMs) drilling through chalk marl.
The rate of progress exceeded 1,000m per month.
The tunnel can accommodate traditional trainsets (passenger/ freight) and shuttles carrying road vehicles (vans and cars, coaches, caravans and
HGVs). The vehicles embark in the terminals.
The installations are operated using highly sophisticated equipment which also means users enjoy a high level of service.
This is an innovative, exceptional project, with setec playing a central role in every aspect since 1957.
The 1986 project, commissioned in 1994, follows on from setec’s preliminary work in 1971-1975.


 Within Eurotunnel (until the end of 1994):
- oversight of design and detailed studies,
- supervision of work and trials,
- control of costs, timescales and quality,
- general technical support.

• Independent Project Manager on behalf of the Governments and Banks:
- assessment of preliminary designs and their Concession compliance,
- monitoring of construction conformity with preliminary designs,
- attending acceptance tests and commissioning,
- scrutiny of operating regulations and security system,
- monitoring of costs, timescales and any contractual problemss,
- monitoring the application of the quality control system.



Key figures

Period of services

Key challenges