Project description

The extension of the A15 motorway to the so-called Maasvlakte crosses the Calandcanal. For this crossing a tunnel is constructed with a total length of 1500 m. The enclosed part of the tunnel is 1100 m. The section below the canal is constructed with the immersed tunnel technique, with six elements of 115 m.

The cross section comprises two motorway tubes with 3 lanes each. The tunnel is suited for the transport of dangerous goods (category I).

Scope of work

Civil and structural:

  • Preliminary design and final design
  • Structural calculations and drawings
  • Geotechnical and geo-hydrological advisory
  • Tender documents
  • Cost estimates and construction planning
  • Detailed design
  • Advisory and supervision upon construction (in co-operation with the client)
Specification sheet 2 page(s) - 358 kB


Ministry of Transport and Public Works, Tunnel Engineering Department

In co-operation with

Not applicable

Type of project

Immersed Tunnels


The Netherlands



Project duration

1995 - 1998 Design and tender phase; 1998 - 2004 Construction

Project phase


Construction cost

€ 145.000.000,= excl. M&E works (excl. VAT)

Consultancy fee

€ 15.200.000,= (excl. VAT)