Contract Notice
Construction Works – Lamiako Under-River Tunnel (Lot 2)
Procedure: Open procedure
Deadline for Submission of Tenders: 15 January 2026
Contracting Authority
Interbiak Bizkaia S.A.
Bilbao, Spain
Tel: +34 944 057 000
Email: interbiaklicitacion@interbiak.eus
Contract Description
Interbiak Bizkaia S.A. has launched an open tender procedure for the construction of the Lamiako under-river tunnel (Lot 2), starting from the left bank of the Bilbao estuary. The project forms part of a strategic road infrastructure scheme aimed at improving connectivity within the metropolitan Bilbao area.
Scope of Works
The contract includes the execution of civil works for an under-river road tunnel with the following main characteristics:
• Tunnel lengths:
o 3,154.3 m
o 3,119.6 m
• Construction method:
o NATM (New Austrian Tunnelling Method)
• Alignment:
o Crossing beneath the Bilbao estuary
• Connections:
o From the Artaza roundabout (Getxo)
o To the Ballonti roundabout, located between Portugalete and Sestao
Works include all associated excavation, structural, lining, safety, and technical installations required for the completion of the tunnel section under Lot 2.
Contract Value
• Estimated value: EUR 132.16 million
• VAT: Excluded
Contract Duration
• 50 months
Procurement Information
Tender documentation is available electronically.
Tenders must be submitted via the contracting authority’s designated electronic submission platform before the stated deadline.
Legal and Publication Information
• TED Reference: 792528-2025
• Official Journal: OJ S 230
For full details and access to tender documents, please consult the official TED notice: