Legacy Way Tunnel

Background: Legacy Way is a 4.6km tunnel linking West and North Brisbane. Consisting of two bored tunnels, the project commenced in April 2011 and was completed June 2015. The Legacy Way project was awarded ‘Project of the Year’ in 2015 at the National Infrastructure Awards.

 idec were engaged a number of times to provide key structures on the tunnel project:

Precast Warehouses – Construction of two (2) warehouses off-site at Wacol, QLD for the manufacture of curved precast concrete segments for lining the tunnel walls. Scope included engineering, fabrication of 164t of steel and installation of steel and cladding.

Tunnel Boring Machine Building– Design and Construct 800t acoustic building, carrying 260t, 60t and 40t overhead cranes over what would become the tunnel entrance/exit at the Western Portal.  Scope included engineering, steel fabrication, installation.  The super structure was designed using trusses and idec built-up plate technology to reduce tonnage. Additionally, the steel was supplied black due to the temporary nature of the structure to create significant cost savings for the Transcity JV.

Cut and Cover Steel for the Eastern Portal. Approximately 170t of steel that would form the tunnel entrance/exit.  Scope included detailing, steel fabrication and installation of structural steel and stainless steel elements.

Water Treatment Building– Design and Construct 21m x 15m steel clad building at Western Portal to house chemical tanks and treatment equipment. Scope included engineering, steel fabrication, installation, cladding and louvres/doors supply and install. The building required a 50 year design life.


kk  1143 CB 120210_0168


  • CLIENT Tanscity JV - Acciona, BMD, Ghella
  • YEAR 2011 - 2015
  • WE DID design and construct, engineering design, structural steel fabrication, steel erection, cladding,
  • PARTNERS Brisbane Qld
  • TAGS