COMSA, in a joint venture with Campezo Obras y Servicios, Grupo Azvi and Iza Obras y Promociones, will develop Phase 1 of the Bilbao Southern Railway Bypass – Serantes Connection section, a strategic infrastructure promoted by ETS to improve the connection between the Port of Bilbao and the national railway network and promote sustainable freight transport.
The project involves the construction of more than 3.4 km of tunnels excavated using the cut-and-cover method, the construction of three large caverns and various structures such as false tunnels, emergency exits, pedestrian galleries and technical buildings.
The infrastructure is structured around four main axes:
1. Connection branch to the Serantes cut-and-cover tunnel (385 m)
2. South Bypass trunk line – Phase 1 (736 m)
3. Serantes 1 branch: mine tunnel for single track (1,300 m)
4. Serantes – Olabeaga trunk line (620 m)
5. Emergency exits (760 m)
With this new contract, COMSA reinforces its experience in complex underground works and its commitment to a more efficient, intermodal and environmentally friendly transport system.