Current construction

Tunnelling complete from corner of Pine Mountain and Scrub Roads

Tunnelling from the shaft on the corner of Pine Mountain and Scrub Roads to the exit shaft at Ewer Street is now complete. The tunnel borer was craned out of the 48m deep shaft over 3 days in April 2018.

With the tunnel drive complete, night work has ceased at Pine Mountain Road and the tunnelling equipment, including the noise wall, will be moved to 110 Scrub Road (near the Energex substation) for the next tunnel drive to Ewer Street.

There is some final work to complete at Pine Mountain/Scrub Road during the day from Monday to Saturday between 6:30am and 6:30pm. Activities include:

1.    Removing tunnelling equipment before grouting the new tunnel
2.    Converting the shaft into a sewer maintenance hole
3.    Restoring the site.

We expect to demobilise from this site around June 2018. The community will receive more detailed information as we progress with these final activities.

Entry shaft construction complete at 110 Scrub Road. Tunnelling starts May 2018

The sewer access shaft on Scrub Road near 110 Scrub Road is complete. The shaft is now being prepped for tunnelling which will start in May 2018. Work hours are Monday to Saturday between 6.30am and 6.30pm.

From this location, the tunnel boring machine will construct the sewer tunnel south under Scrub Road to Ewer Street and then north under Scrub Road to Settlers Street Park.Once tunnelling commences, the site will operate 24 hours a day from 6am Monday to 6pm Saturday. Some occasional maintenance work might be done on Sundays between 7am and 2pm.

The community will be informed about the start date for tunnelling closer to the time.

To register your interest in being updated, please email

Exit shaft - cnr Ewer St/Scrub Road

After journeying 700m from Pine Mountain Road, the tunnel boring machine (TBM) was extracted at Ewer Street in early April 2018. A partial road closure is currently in place while crews work to remove tunnelling equipment from the shaft.Work hours are 7am to 6.30pm, Monday to Saturday.

The site will soon be returned to its demobilised footprint and will remain locked down until tunnelling from 110 Scrub Road (as above) is complete and the tunnel borer is extracted again around mid-2018.

Following the second extraction, equipment will be removed from the tunnel before the shaft is converted to a sewer maintenance hole and the area restored. Residents will receive further information about this work closer to the time.

To register your interest in being updated, please email

Video: Timelapse of the TBM extraction after chomping its way through the depths of Carindale and emerging from a 48m deep shaft.

What have we done so far?

Since August 2016, the project team has:

  • constructed two tunnel boring machine exit shafts, one in Edwards Reserve off Tones Road, Mansfield and another on the corner of Ewer Street and Scrub Road, Carindale. The Ewer Street shaft is an impressive 48m deep and took six months to construct
  • constructed three tunnel boring machine entry shafts, one on the Allen Innes Oval off Tones Road in Mansfield, one on the corner of Pine Mountain and Scrub Roads in Carindale and one on Scrub Road closest 110 Scrub Road Carindale
  • tunnelled 582m between the Allen Innes Oval entry shaft and the Edwards Reserve exit shaft
  • tunnelled 852m between the shaft on the corner of Pine Mountain and Scrub Roads and Edwards Reserve
  • tunnelled 700m between the entry shaft on the corner of Pine Mountain and Scrub Roads to the exit shaft on the corner of Ewer Street and Scrub Road
The shafts that are not currently in use have been secured and will await the tunnel boring machine's arrival. 

What’s next?

Over the coming six months we will be: 
  • tunnelling 800m south from the shaft at 110 Scrub Road to the shaft on the corner of Ewer Street and Scrub Road.
  • tunnelling 754m north from the shaft at 110 Scrub Road to Settlers Street Park
  • open trench construction of the sewer pipe along the creek side of the Allen Innes Oval off Wecker Road, Mansfield. Open trench construction is underway.
  • open trench construction of the sewer pipe in Settlers Street Park, Carindale
  • constructing a sewer maintenance hole in parkland off Cadogan Street, Carindale

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

Our commitment

The project team is committed to minimising the construction impacts for local residents where possible.

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 minimise the disruption.

At any time during construction, residents can contact the project team on 1800 071 230 (24/7) . 

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 6742 (Weekdays 9am-5pm)
  • Phone: 1800 071 230 (24/7)
  • Email:
Thank you for your patience during this essential work.

Extracting the 45 tonne borer from a 48m deep shaft at Ewer Street (April 2018)



It's a long way down!

The exit shaft on the corner of Ewer Street and Scrub Road Carindale is now complete and awaiting the arrival of the tunnel boring machine.

Channel 9 news ran a story about Queensland Urban Utilities' underground highway of sewer and water infrastructure.

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 finished its first tunnel section from the Allen Innes Field to the Edwards Reserve exit shaft.

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

Sewey pictured here in the launch position in the Allen Innes Oval shaft.

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 mid-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.


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.

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

Are you interested in specific aspects of the project?

Construction methodology