Construction update - October 2018

The Bulimba Creek Stage 2 Sewer Upgrade is nearing completion, with 4.25km of the new trunk sewer installed. Tunnelling is complete and construction of maintenance holes is underway or nearing completion along the alignment. Work in all locations is expected to be completed by March 2019, subject to weather and site conditions.

Location: Corner of Ewer Street and Scrub Road

A partial road closure will be in place from late August for about 12 weeks while the final phase of work is completed at Ewer Street (subject to site and weather conditions). Work has been completed over the past two months to grout the new pipe in place.

What happens next?

Work will start from mid-October to convert the 48m deep shaft to a permanent maintenance hole, which is expected to take up to five weeks to construct. This activity will require the use of large cranes, concrete pumps and trucks while the pre-cast maintenance hole is installed, after which the lid will be put in place.

Working hours: Monday to Saturday between 6.30am and 6.30pm

Restoration
Following construction, Ewer Street will be opened to two way traffic and final restoration is expected to commence around mid-to-late November. This will involve changed traffic conditions at various times for road resurfacing, traffic island works and line marking for up to four weeks.
Location: Corner of Pine Mountain and Scrub Roads

Construction of the maintenance hole at Pine Mountain Road will re-commence from mid-October for up to five weeks (subject to weather and site conditions). The work involves installing sections of a pre-cast maintenance hole liner in the 15m deep shaft, which will be concreted in place before installing a lid to cover the opening.

The site will be accessed Monday to Saturday between 6.30am and 6.30pm.

Restoration
Following construction, restoration is expected to commence in November and will involve laying new turf, installing bollards and reinstating the shared footpath/bikeway. We are also partnering with the Bulimba Creek Catchment Coordinating Committee (B4C) to ensure suitable offset planting in approved areas following the work, in line with Council requirements.

Location: 110 Scrub Road (near the Energex substation)

Construction of the new sewer from 110 Scrub Road to Settlers Street Park is complete and the tunnel boring machine (TBM) was extracted in late October.

Working hours:
24 hrs, 6 days from 6am Monday to 6pm Saturday while crews strip equipment out of the tunnel and grout the pipe in place until late November (up to five weeks).

Once the tunnel stripping and grouting are completed, day work will continue from Monday to Saturday between 6.30am and 6.30pm to convert the shaft to a maintenance hole. Construction is expected to take up to five weeks, subject to weather and ground conditions, and involves large cranes, excavators, concrete pumps and trucks. Restoration of affected areas will follow in early 2019.

What to expect

Construction noise, vehicles and equipment, changed traffic conditions, safety lighting and some dust can be expected. A noise reduction wall has been installed around the worksite and noise suppression barriers placed around plant equipment where possible.

Location: Settlers Street Park and Cadogan Street

Our contractor has installed 300m of new pipe and commenced construction of three large maintenance holes in Settlers Street Park and Carindale Reserve.

Working hours: Monday to Saturday between 6.30am and 6.30pm

Work at this location involves:

  • setting up a worksite and compound just north of Settlers Street in the park and off Cadogan Street in Carindale Reserve
  • constructing a temporary access track from Settlers Street into the park
  • constructing a permanent access track from Cadogan Street into the park to allow for future maintenance access
  • open trenching between Settlers Street Park and Cadogan Street to install 300m of new sewer pipe across Bulimba Creek, including piling to support the pipe
  • temporary partial damming of Bulimba Creek to install support piles and the sewer pipe. This will be done in stages to ensure creek flows are maintained at all times
  • tunnelling 754m underground between 110 Scrub Road and Settlers Street Park
  • constructing an exit shaft to extract the tunnel boring machine in Settlers Street Park
  • constructing three large sewer maintenance holes along the pipe alignment in the park
  • completing tie-in works to connect the new sewer pipe to the existing network in Carindale Reserve

What to expect

Construction noise, vehicles and equipment, changed traffic conditions and some dust can be expected. Some vegetation will be cleared and any trees marked with 'R' will be removed in accordance with approved Council permits.

To register your interest in receiving project updates, please email community.feedback@urbanutilities.com.au.

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 entry shaft on the corner of Pine Mountain and Scrub Roads to the exit shaft in 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
  • tunnelled 802m between the entry shaft at 110 Scrub Road to the exit shaft on the corner of Ewer Street
  • prepared the TBM retrieval site at Settlers Street Park
  • tunnelled 700m north from the shaft at 110 Scrub Road to Settlers Street Park
  • open trenched 300m of sewer pipe in Settlers Street Park, Carindale and across Bulimba Creek
  • installed a new sewer pipe along the edge of the Allen Innes Oval off Wecker Road, Mansfield
  • constructed a shaft and converted it to a maintenance hole in Edwards Reserve, off Tones road
  • constructed two maintenance holes along the creek side of the Allen Innes Oval off Wecker Road, Mansfield.
  • constructed a pedestrian footpath to enable access from Greendale Way across Scrub Road onto Pine Mountain Road.

What’s next?

Over the coming months we will be: 
  • stripping and grouting the tunnel between 110 Scrub Rd and Settlers St Park
  • converting the shafts at Ewer Street, Pine Mountain Road and 110 Scrub Road to permanent sewer maintenance holes
  • constructing two large maintenance holes in Settlers Street Park and one in parkland off Cadogan Street, Carindale
  • connecting the new sewer into the existing network at either end of the alignment
  • restoring areas affected by our works as construction is completed

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, you can:

  • Phone: 1800 071 230 (24/7)
  • Email: Community.Feedback@urbanutilities.com.au
Thank you for your patience during this essential sewer upgrade, which will cater for future growth and development in the catchment area and reduce the likelihood of sewage overflows.

The tunnel boring machine's final breakthrough at Settlers St Park, Carindale (October 2018)

TBM breakthrough Settlers St Park

Rock chippings extracted during tunnelling (August 2018)

MH4 tunnelling rock chippings

Inside the tunnelling control cab at 110 Scrub Rd (August 2018)

MH4 tunnelling control cab

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.

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.

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