Northshore Trunk Sewer

Civil, Infrastructure, Power, Utilities, Water



Project Highlights

  • Delivered on schedule and in line with budget requirements.
  • Involved construction of over 1km of trunk sewer.
  • A number of concrete reinforced retrieval and launch shafts were constructed; varied in depth between 8 and 12m
  • Sewer constructed by micro tunnelling between each shaft
  • Detailed planning and liaison with local businesses was required to minimise disruption of services and to maintain access.
  • The project also required detailed traffic control plans and management strategies.
  • Significant re-design was required due to the extensive numbers of existing services in the area.

Hamilton, QLD

Urban Land Development Authority

Project Duration
December 2011 – December 2012

Project References
Nick Rozis (Bornhorst & Ward)
Mobile +61 418 755 661

Located along the Brisbane River at Hamilton, Northshore Hamilton is Brisbane’s largest urban renewal project. Over the next twenty years the 304 hectare site will be developed into a retail, residential and commercial hub that will be home to over 15,000 residents and workers alike.

 In late 2011 Pensar were awarded a contract for a major infrastructure component of the development when they were commissioned to construct 477m of Dia 600VC, 603m of Dia 500VC and 93m of DN250 PE gravity sewer main within the Northshore development.

The trunk sewer was completed by micro tunnelling to avoid the extensive network of existing services and meet the gradiant requirements. This was achieved by firstly constructing a number of retrieval and launch shafts up to depths of up to 12m and then constructing sections of poured concrete wall and concrete base slab. Each shaft was then connected by micro tunnelling remotely controlled from a central control room.

Additional works for the project also included decommission of existing sewer stations and landscaping.

A number of challenges had to be overcome when undertaking these works, including varying site conditions, large volumes of ground water due to proximity to the Brisbane River and a number of local businesses including fuel depots that had to remain fully operational during works.

Despite these challenges, through detailed planning and execution and effective key stakeholder and community engagement, works were completed on time and to budget.

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