Background

Queensland Urban Utilities is committed to excellence in water and sewerage services that meet the evolving needs of our customers and enhance our communities.

As part of this commitment, we’re investing $55 million to build a new 4.25km sewer main between Wecker Road, Mansfield and Cadogan Street, Carindale. The project will cater for future growth and development in the catchment area and reduce the likelihood of sewage overflows.

Previous stages 1 and 1A of the Bulimba Creek Trunk Sewer upgrade were completed in 2004-2016 and 2011-2013 in Mansfield, Wishart, Eight Mile Plains and Macgregor.

The existing Bulimba Creek Trunk Sewer Services about 158,000 people to the south-east of the Brisbane CBD. It is comprised of about 62km of sewer pipes ranging in diameter from 375mm to 1,650mm and discharges to the Gibson Island Sewage Treatment Plant.

Meet Sewey the Tunnel Boring Machine!

Caitlin Gamble was the winner of the tunnel boring machine design competition

We invited the Easts Mt Gravatt Junior Rugby League Football Club under 12 members to design and name our tunnel boring machine. Caitlin Gamble is seen here with her winning design. 

 

Sewey the Tunnel Boring Machine was launched on 25 November 2016.

Sewey is a 14m long, by 1.8m diamter wide tunnel boring machine that weighs more than 45 tonnes - the equivalent of six elephants. It has started tunnelling from the Allen Innes Field and is expected to reach the Edwards Reserve exit shaft around January, weather and ground conditions permitting.

Tunnelling will occur in shifts over 24 hours from Monday to Saturday, with machinery maintenance scheduled on Sundays.

What have we done so far?

Since August 2016, the project team has constructed a tunnel boring machine exit shaft in Edwards Reserve off Tones Road, Mansfield and two tunnel boring machine entry shafts, one on the Allen Innes Oval off Tones Road in Mansfield and one on the corner of Pine Mountain and Scrub Roads in Carindale.

The shaft in Edwards Reserve has been made secure and will remain inactive until the tunnel boring machine tunnels through from the Allen Innes Field. The shaft on the corner of Pine Mountain and Scrub Roads will remain inactive until the tunnel boring machine is brought to site around May 2017.

What’s next?

Over the coming three months we will be:
• tunnelling from the Allen Innes Field shaft to the Edwards Reserve shaft. Tunnelling started in late November 2016. Work on the tunnelling will continue over the Christmas period, except on public holidays.

• constructing the shaft on the corner of Ewer Street and Scrub Road is expected to begin in early 2017.


You can interact with this map by zooming in and out and clicking on the map features for more information.

What can I expect?

• During tunnelling operations, construction will take place around the clock, 24 hours per day, Monday to Saturday.
• Construction noise around the shaft locations, including the operation of excavation machinery, truck movements including reversing safety beepers, and generators.
• Dust may be visible and will be monitored and managed at source, using water suppression, as required.
• Changed traffic conditions on Scrub Road including reduced speed limits.
• Ewer Street will be closed to all traffic at the Scrub Road end. All traffic entering and exiting Scrub Road will need to use Woodland Street. Private property access will be maintained.
• Lighting during night works on the Allen Innes Field.

How will construction impacts be managed?

We will work closely with residents impacted by construction to address any concerns during the project, in addition to:
• monitoring noise levels to ensure work methods are appropriate
• sound barriers will be placed around the worksite to suppress noise as much as possible
• truck movements will be restricted to no later than 6pm daily to minimise noise during night works
• using approved traffic management to ensure the safety of road users and pedestrians
• residents can call the project team at any time 24/7 on 1800 071 230 (free call) for assistance or information.

Our commitment

The project team is committed to minimising the construction impacts on local residents.

We will keep you informed about progress and provide regular construction updates for directly impacted residents. We will also work closely with the project contractor to ensure every effort is made to keep any disturbances to a minimum.

At any time during the construction, you can contact the project team on 1800 071 230 (24/7) if you have any questions or concerns. 

To find out more

To find out more about the Bulimba Creek Stage 2 Sewer Upgrade or to register to receive project updates, you can:

  • Phone: 07 3855 6203 (Weekdays 9am-5pm)
  • Phone: 1800 071 230 (24/7)
  • Email: Community.Feedback@urbanutilities.com.au
Thank you for your patience during this essential work.

 Tunnel boring machine ready to start tunnelling from Allen Innes Reserve (MH7T)

Sewey the Tunnel Boring Machine is on it's way! Sewey has started tunnelling from the Allen Innes Oval and is making its way to Edwards Reserve. It should arrive at the Edwards Reserve site in around eight weeks.

The shaft on the corner of Pine Mountain and Scrub Roads is ready for the tunnel boring machine when it arrives in May

The shaft on the corner of Pine Mountain and Scrub Roads is now complete and ready for the Tunnel Boring Machine to be brought to site around May 2017. The site will be made secure and remain inactive until then.

Artists impression of Tunnel Borer in launching shaft and sewerage pipes being lowered into position

This graphic shows the tunnel boring machine in place and the sewer pipe being lowered into the sewer shaft. Tunnel boring is a trenchless technology that significantly reduces the impact of constructing a sewer on the community and the environment.

 

Tunnell Boring Machine exit shaft colar in place in preparation for shaft construction
 

Looking into the shaft at Edwards Reserve

 

Digging out the shaft in Edwards Reserve 

Caissons shafts are constructed using a hydraulic ram and concrete segments.When we hit rock and can no longer use the 'caisson' method of constructing the shaft, a digger is lowered by crane into the shaft and a hydraulic pick is used to break up the rock. Concrete (or shotcrete) is then sprayed onto the walls of the shaft.

Edwards Reserve construction site panoramic from the bikeway/footpath

A panoramic view of the Edwards Reserve construction site from the bikeway/footpath.

 Temporary access road to construction area around outside of rugby field

The temporary access road has been constructed to allow construction vehicles to enter the Allen Innes Oval site. The access road goes around the outside of the Rugby Club's football fields to minimise impacts on the Club.

Looking into the shaft on the Pacific Golf Club corner of Pine Mountain and Scrub Roads

Construction of the shaft on the Pacific Golf Club corner of Pine Mountain and Scrub Roads is well underway.

Worker in cage being taken out of the shaft

A shaft construction worker being taken out of the shaft by a craned cage. The worker operates the digger down the bottom of the shaft.

Open trenching sewer

Where tunnel boring is not possible open trenching will be used. Open trenching involves digging a ditch then laying the sewer pipe. The ditch is then back filled and rehabilitated.

The Bulimba Creek Stage 2 Sewer Upgrade Fact Sheet can be found here

Are you interested in specific aspects of the project?

Construction methodology

Environment