The extension of the A15 motorway to the so-called Maasvlakte crosses the Caland canal.
bird eye view of the Calland tunnel

Project facts Calandtunnel

  • Client
    Ministry of Transport and Public Works, Tunnel Engineering Department
  • Project duration
    1995 - 1998 Design and tender phase; 1998 - 2004 Construction
  • Country
  • Project phase
  • Location¬†

Project description

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)

Hans de Wit - Managing Director / Senior Consultant

Hansde Wit

Managing Director / Senior Consultant