Officially launching on 1 July 2021, Greater Western Water is an integration of Western Water and City West Water in Victoria, with the move designed to ensure better water services for customers in Melbourne’s fast-growing outer west.
Ms Lang is currently Managing Director of City West Water and has previously held executive roles with Melbourne Water and Chemistry Australia, as well as other senior consulting roles.
“Everyone at Western Water and City West Water will be part of Greater Western Water – it’s a unique opportunity to bring together our different experiences, backgrounds and skills to co-create a new organisation that reflects our equally diverse communities,” said Ms Lang.
Western Water Chair Andrew Cairns said the appointment was a great outcome for the new utility.
“Maree brings a wealth of experience and achievements to the role and will champion the culture and values that we know are important to our people and communities of the west,” he said.
Western Water Managing Director Jeff Rigby will remain in his role until 30 June 2021, at which point he will become part of Greater Western Water’s executive leadership team.
All existing staff from both organisations will be transferred to the new company, and $500,000 has been invested in planning upgrades to convert Western Water’s Sunbury office into a Greater Western Water hub.
Since beginning in mid-January, the company’s Southern Operations Water team has now mobilised sevenwater main renewal crews in both Melbourne’s western suburbs and Central Business District.
Interflow said the new services would provide great benefit to locals.
“We are thrilled to help CWW achieve their ambition of delivering exceptional water services that are affordable, safe and reliable for the community,” the company said in a social media post.
A major name in the water industry, Interflow is one of Australia and New Zealand’s leading providers of trenchless pipeline solutions, specialising in the water mains, wastewater, stormwater and culvert sectors.
CWW is one of three metropolitan Melbourne’s water businesses owned by the Victorian Government, providing drinking water, sewerage, trade waste and recycled water services to customers in Melbourne’s CBD, inner and western suburbs.
Microtunnel Boring Machine (MTBM) Hinehōaka completed the boring for the 1,120-m storage pipeline, which includes a marine outfall, late in 2020, with construction taking place in three separate tunnelling drives using pipe-jacking methods.
Two shafts were constructed in council parkland at the bottom of the cliff face to accommodate each tunnelling drive and a third shaft needed to be constructed in the narrow streets around St Marys Bay.
This shaft was designed to be capable of retrieving the MTBM from a 3.8-mdiameter shaft, 25 mbelow ground.
The new pipeline will reduce wastewater overflows to St Marys Bay and Masefield Beach by 95 per cent.
The high flows after rain events will be stored in the new larger capacity pipeline and pumped back into the sewer network for treatment when there is capacity.
Once complete, the new marine outfall will reduce overflows and discharge to an outfall far away from places where people swim.
McConnell Dowell said one of the major challenges the project team faced was tunnelling very close to, and underneath, restored villas worth millions of dollars in one of Auckland’s oldest suburbs.
To mitigate stakeholder issues and concerns, the project set up a ‘SiteHive’ unit to collect data while the MTBM was operating.
This unit continuously collected noise, dust and vibration monitoring readings from the worksite and this data helped proactively manage consent compliance, as well as record the impact of the operations.
When noise reached predetermined levels a photo and sound recording were taken to capture the activity onsite.
This monitoring meant the team could ensure construction activity operated within the consent conditions and any exceedance was investigated to see what changes could be made to ensure compliance in the immediate future.
Parwan-Balliang Irrigation District Pipeline Issued by: Western Water Closing Date: 02 June 2021 Location: Victoria Description: Western Water is intending to release a RFT for construction of the Parwan-Balliang Irrigation District (PBID) pipeline.
The work involves:
Installation and commissioning of approximately 14 km of 600 mm and 675 mm diameter RRJ GRP pipe, 450 mm diameter PE pipe, and associated fixtures
Installation of trenchless crossing of several creeks and roads
Supply of various pipes and fittings, noting that the Principal will supply the GRP pipe
Installation of customer irrigation offtake assemblies including meters and associated equipment
Interaction with various landowners for construction within easements on private property.
Chillagoe Bore and Pipeline Project Issued by: Mareeba Shire Council Closing Date: 27 April 2021 Location: Queensland Description: The works include, but are not necessarily limited to, the supply of all materials, plant, and labour of whatever kind necessary for the following:
Trenching, supply, and installation of DN150 oPVC/DICL pipeline.
Design, supply, and installation of PE100 DN180 HDD underbore.
Construction of concrete slab for bore headworks.
Design, supply, and installation of shed structure at bore headworks.
Engawala – Water Source Security Improvement Investigations Stage 2 Issued by: Power and Water Corporation Closing Date: 27 April 2021 Location: Northern Territory Description: Power and Water Corporation (PWC) is seeking to extend hydrogeological investigations to augment the Engawala water supply network through a bore drilling program. The community of Engawala (also known as Alcoota) is located 24 km north of the Plenty Highway, 175 km north-east of Alice Springs, Northern Territory (NT). Water for community supply is drawn from a small borefield, consisting of four low-yielding bores of which only two bores can be run at any one time due to interference. The current bores target fractured zones within the gneissic and schistose rocks of the Proterozoic Arunta Basement, and the main source of recharge to the targeted aquifer system is from the local irregular rainfall.
Interflow’s Sydney Workshop team was recently treated to a special moment, when three versions of the Kubota were all lined up together.
This was an incredible opportunity for the team to reflect on the company’s vibrant history and thirst for innovation.
Transforming the Kubota
The Kubota is an integral piece of machinery that facilitates the installation of Interflow’s spiral wound solution, Expanda, onsite.
Since the 1990’s, there have been four revisions of the Kubota.
Through each revision, Interflow’s Engineering team made improvements to the machine’s capability, ease of use, performance, and safety.
Interflow Mechanical Engineer Nghia Nguyen explained that adopting a ‘continual improvement’ mindset is so important.
“It’s about putting our people first – giving them the tools they need to complete the job safety, effectively and efficiently.”
Mr Nghia also explained how certain opportunities for improvements to the Kubota were identified and implemented.
“We looked at how our crews were using the machinery on-site,” he said.
“By understanding what their requirements were and the types of conditions they were working in, we were able to gain a better understanding of how we could streamline the process through enhanced tools and machinery.”
Over the years, Interflow’s Engineering team has demonstrated a strong commitment to supporting crews on the front line with innovative and purpose-built machinery.
“There has been a lot of trial and error involved in the development of the Kubota… but that’s what makes Interflow so great,” said Mr Nghia.
“We’re not afraid to try new things and invest in research and development.
Among the products the utility is using across its operations is crushed glassmade by reprocessing waste glass material that would otherwise be sent to landfill, to create a product that can replace sand used as backfill around new sewer pipes.
YVW said many of the other products approved for use are locally made by Repurpose It, a company based in northern Melbourne.
All products are approved by a technical advisory group at YVW and are promoted for use by its contractor partners.
The organisation also recently announced it will build its second waste to energy plant, which will transform end-of-life food waste into renewable energy that will help to power its treatment facilities.
YVWaims to generate 100 per cent of its own energy needs through renewable energy by 2025.
The works will allow wastewater to flow from the Ellenbrook, Jandabup and Neerabup main pump stations into the Alkimos Wastewater Treatment Plant as the existing conveyance infrastructure lacks sufficient capacity.
The project involves the installation of 1,931 m of DN1800 sewer main, with 1,167 m to be delivered via microtunnelling, as well as 6 and 25 m deep vortex chambers and 6 more sewer manholes.
Rob Carr said it was looking forward to working closely with its design partner SMEC and Water Corporation to deliver the important infrastructure.
The company held a training session with Sydney Water on the Primus Line®system last week to re-train staff and continue the unique method’s implementation for the renewal of water and sewer pressure mains.
Being a self-performing utility, Sydney Water undertakes Primus Line installations with their own crews, making the training sessions an important part of the continuing relationship.
The Primus Line is a flexible liner, reinforced with aramid fabric, with specifically developed connectors forming a high-performance solution for the trenchless rehabilitation of pressure pipes or for setting up a robust independently placeable flexible line.
Infrastructure Australia Chief Executive Romilly Madew said the list is “a comprehensive overview of nationally-significant infrastructure needs, providing an investment roadmap to guide Australia’s economic recovery and improve quality of life as we continue to absorb and respond to the shocks of COVID-19”.
“We have added a record 44 new proposals to the Priority List for consideration by Australia’s governments across the broad spectrum of transport, energy, water, waste, telecommunications and social infrastructure,” she said.
“Spanning all key infrastructure sectors and highlighting investment opportunities across Australia’s unique geographies, the 2021 Priority List reflects our changing infrastructure needs.”
The list includes an upgrade of southeast Melbourne’s water infrastructure, where Infrastructure Australia has identified an opportunity to re-use more of the water currently recycled at the city’s Eastern Treatment Plant.
The plant produces more than 130 billion L of recycled water each year, of which about 95 per cent is treated and discharged into the Bass Strait.
“There is an opportunity to re-use more of this water to safely irrigate high‑value horticulture crops, parks, sporting fields and green open space, rather than using potable water for these purposes,” Infrastructure Australia said.
“The initiative could be addressed through a program of water infrastructure, planning, policy and management interventions to realise the value of rainfall-independent supply sources in South East Melbourne, and potentially other parts of Melbourne as well.”
A timeframe of 10-15 years has been put on the initiative.
After a watermain failure in 2019 led to a sewer collapse that released 800,000 L of sewerage into Lake Taupō, the district council sought to develop a tool to help avoid future disasters.
In response, GHD used its GHD InDEGO tool and geospatial analysis to develop a consistent data-driven Risk Assessment Portal, with an interactive tool for analysing and visualising the risk profile of three of the council’s key water assets – potable water, wastewater and stormwater.
The instrument integrates multi-criteria analysis with a dynamic, user-friendly interface, where potential hazards, including wastewater and stormwater, are identified and weighted based on agreed criteria and risk scenarios.
The district council can now quickly run scenarios to identify areas across the three waters system where risk may be elevated.
“The tool helps us get more information out of the GIS data we already have,” said Taupō District Council Wastewater Asset Manager Michael Cordell.
“It allows us to quickly look at combinations of parameters to help us better understand our assets and the potential risk to these assets.”
Wastewater Pipe Flushing, CCTV & Condition Assessment Program Issued by: Mount Barker District Council Closing date: 09 March 2021 Location: South Australia Description: Mount Barker District Council (the Council) invites tenders from tenderers for the provision of services for wastewater pipe flushing, CCTV and condition assessment program. Mount Barker District Council owns and operates a community wastewater management system (CWMS) and main sewer for the townships of Mount Barker, Littlehampton, Nairne, Brukunga, Echunga, Meadows and Macclesfield. The total length of the reticulation (gravity) network including all of the townships is approximately 250 km.
Pipe relining at Hawthorne Road, Hawthorne Issued by: Brisbane City Council Closing date: 26 February 2021 Location: Queensland Description: Council is seeking tenders for pipe relining at Hawthorne Road, Hawthorne.
Intersection upgrade – Milton Street and Archibald Street Issued by: Mackay Regional Council Closing date: 16 March 2021 Location: Queensland Description: This project is for the construction of a single lane roundabout at the Milton Street and Archibald Street intersection. The works include the construction of the roundabout and associated works, relocation of underground services, water main relocation and new trunk drainage infrastructure.
Sydney Street water main replacement Issued by: Mackay Regional Council Closing date: 16 March 2021 Location: Queensland Description: Mackay Regional Council requires the construction of a new water main running along Sydney Street between River Street and Shakespeare Street, to replace the existing ageing water main
The West Werribee Sewer Pump Station upgrade involved the construction of a new pump station, as well as the installation of a new sewer line under the Princes Freeway and the decommissioning of the existing pump station.
The new station can pump up to 650 L/second and will be further expanded to 1,200 L/second in the future as the region grows to include a predicted 60,000 new dwellings.
CWW GM of Infrastructure and Delivery Amanda Smith said the upgraded infrastructure will support a growing population.
“The new pumping station is CWW’s third-largest sewerage pump station and secures reliable and vital sewerage services for those living and working in Werribee,” she said.
CPB Contractors, Aurecon and GHD are currently engaged in a competitive request for proposal (RFP) for the Main South Road Duplication (MSRD) and Victor Harbor Road Duplication (VHRD) projects, located south of Adelaide.
As part of the RFP, the SA Department for Infrastructure and Transport are now requesting EOIs from SA subcontractors and suppliers interested in being a part of the project.
Included in the prospective packages is the installation of stormwater drainage systems and relocation of existing water mains, including the installation of drainage pipes, pits, gross pollutant traps and headwalls.
The project is also seeking EOIs for the supply of stormwater drainage pipes and pits, which may include RCP pipes, box culverts, pits and pit lids, gross pollutant traps and headwalls.
Onsite works on the project are expected to commence in Q4 2021.
Too isolated for large populations, and with ground conditions too hard for agriculture, the Northern Beaches’ natural beauty has remained largely intact over the years. With many locals living among the secluded beaches and national park areas and the advent of modern demands, the rollout of the National Broadband Network (NBN) to the area via the Mona Vale Western Foreshore NBN Outfalls was inevitable.
The challenge was finding a suitable solution to install this vital infrastructure in such an inaccessible and environmentally sensitive location with difficult rock conditions.
Strict environmental requirements
From the start, the project was bound by rigorous environmental conditions considering much of its location was covered by the Ku-ring-gai Chase National Park. A trenchless solution became a non-negotiable in order to minimise the environmental impact – with horizontal directional drilling (HDD) being the preferred method.
To undertake the job, Central Coast-based HDD specialist Superior HDD was engaged by Downer to complete the four HDPE HDD ocean outfall connections. Superior HDD Managing Director and Operations Manager James Burch recognised the project’s challenges immediately.
“This is a very sensitive national park area, with many parts only accessible by water,” he says.
“HDD was the only way to do it, and we knew with good planning, design, and risk mitigation, we would get it done right.”
Mr Burch says his priority was first to fully understand the project’s risks in detail.
“We know the ground conditions in this area very well, and while the consistent Hawkesbury sandstone provides hard but predictable drilling conditions, being such a sensitive area, hydrofracture was not an option,” he says.
“So, we had our HDD design specialists complete a detailed profile and alignment and hydrofracture assessment, coming up with an ultraconservative, deep profile to minimise frac-out from that perspective.”
Mr Burch explains that from there, drilling fluid was the next step in the process.
“We needed bentonite to ensure optimal borehole performance and cuttings removal, but we couldn’t risk release of this fluid into the surrounding waters,” he says.
“So, we devised a detailed drilling fluid plan which used a bentonite program for most of the initial pilot, then a complete displacement of the hole, replacing all fluid with an environmentally low-impact xanthan gum mix.
“This allowed us to punch out using the biodegradable xanthan gum fluid, as well as to responsibly plan, monitor and analyse our returns for the entirety of the bores.”
During the job, Superior HDD found mobilising its Ditch Witch JT60 All Terrain midi rig and support equipment to the isolated sites also required many practical adaptations.
“Many of the project areas are accessible only by water, and being ocean outfalls, much of our support equipment was transported and set up on barges for the duration of the project,” says Mr Burch.
Along with limited accessibility, the steep and rocky environment added additional challenges.
“For more than one crossing, there was a 50 m elevation difference between the drill site and the mud recycling system on the barge.
“We rose to this challenge by supplying top of the range, powerful transfer pumps, as well as extensive auxiliary equipment to minimise possible interruptions.”
Mr Burch says the project required involvement of a range of stakeholders, with Superior HDD seizing the opportunity to demonstrate the strengths of HDD.
“We had eyes on us for the whole project. In such a pristine environment, the local community was very environmentally conscious,” says Mr Burch.
“We consulted closely and regularly with stakeholders to be fully aware of and compliant with all environmental requirements, and to put concerned locals’ minds at ease.
“We also don’t rely on subcontractors for any of our HDD equipment, so we were able to personally consult with major stakeholders like National Parks, and then directly supply all gear in compliance with their strict requirements, including tracked machinery only.”
Mr Burch says the final of the four connections was completed in late September, on budget and within required timelines.
“We were proud to showcase the accuracy and environmental benefits of HDD with this project, proving that with good preparation and risk mitigation, it’s a safe, responsible method in even the most pristine environments.”
This article was featured in the December 2020 edition of Trenchless Australasia. To view the magazine on your PC, Mac, tablet or mobile device, click here.
MuleSoft’s Anypoint Platform™ has so far been used to enhance YVW’s Fault Calls Interactive Voice Response (IVR) call handling system, with application programming interfaces (APIs) built to automate data sharing and allowing customers to self-service critical information about interruptions and outages.
YVW performs around 100,000 lab tests per year on its water supply, recycled water supply, wastewater networks, wastewater treatment plants and receiving waterways, and MuleSoft’s integration has now allowed these results to feed directly from the laboratory into YVW systems in real time.
YVW General Manager Service Futures Glenn Wilson said modern challenges in the water sector required new and innovative ways of doing things.
“YVW’s work with MuleSoft represents a key strategic relationship, with their platform ultimately becoming the cornerstone of our future technology roadmap —in effect the glue that brings all of our different components together through an API-led approach,” he said.
The company’s AM-LINER II® is a method for rehabilitating damaged wastewater and stormwater pipelines encompassing these qualities and has proven its strength under the most intense environmental circumstances.
PipeTech’s AM-LINER II is manufactured from a polyvinyl chloride (PVC) compound specifically formulated for pipeline rehabilitation and is resistant to all normal sewer effluents due to its superior chemical and flame-resistant properties. It is manufactured in a factory and not in the ground, with the physical properties of the liner known at the time of manufacture rather than weeks after installation.
AM-LINER II provides a cost-effective, minimally disruptive and efficient means of rehabilitating even severely damaged sewer pipes. Once installed, the PVC liner is continuous from manhole to manhole, eliminating leaking joints, root intrusion and further damage to the existing host pipe by corrosive sewer gases.
There are no hazardous chemicals to handle, no noxious odours and no hazardous materials released into the environment, while the smooth interior surface even transitions through offsets to give enhanced flow characteristics to the rehabilitated pipeline.
Tried and tested
Following the 2010–2011 Canterbury earthquake on New Zealand’s South Island, the region’s wastewater network was extensively damaged, causing issues for communities affected by the shock. The earthquake showed liquefaction and resulting ground deformations caused major geotechnical hazards to civil engineering infrastructures such as pipelines.
In particular, sewer pipes have been damaged in many areas of Christchurch as a result of liquefaction-induced lateral spreading near waterways and ground oscillation induced by seismic shaking. While most of the damaged sewer and water pipes in Christchurch were in sections made of asbestos cement, several segments of PVC, concrete and polyethylene (PE) pipes were also sheared, pulled out or compressed at various levels, with these damages affecting the sewer network’s functionality in many places.
A study comprising an extensive thesis completed by then-Auckland University student Shyamal Ram investigated the performance of sewer pipes equipped with the AM-LINER II during earthquakes and established its performance as a structural retrofitting measure to earthquake-proof sewer pipes.
The key objective of this research was to analyse the response of buried sewer pipes to liquefaction induced permanent ground deformation, particularly in the transverse direction and was completed by investigating the use of a flexible liner as a potential countermeasure to increase pipe capacity. Underpinning this study was the goal to ultimately retain pipe serviceability following an earthquake, thereby reducing community impacts and rehabilitating the wastewater network.
On average, the AM-LINER II increased the displacement capacity by 191 per cent, with the results confirming the product as an effective countermeasure for sewer pipes in liquefied ground, not only in terms of increased deformation capacity, but also because AM-LINER II can prevent an influx of sand and water through broken pipes. This allows sewer pipes equipped with the liner to remain serviceable even under severe liquefaction conditions.
As a result, restoration of damaged pipes can be delayed so that attention can be provided to more important services or facilities.
Manawatu District Council Special Projects Manager Chris Pepper praised the AM-LINER II as a reliable and efficient trenchless product.
“The AM-LINER II is quick and easy to install, is a fully structural product, has a proven seismic response and a demonstrable life cycle well in advance of 100 years,” he says.
“It is fully compatible with other trenchless inspection and repair techniques for sewers, including Later Joint Repair (LJR) products.”
Whanganui District Council Engineering Officer Chris Carter added that the council has used the reliable product since 2011 with no issues.
“Easy and quick to install with seamless lengths of a stable material, WDC have found it an excellent solution to remedy infiltration, root intrusion and structural faults,” said Mr Carter.
Another long-term user of the AM-LINER II, South Taranaki District Council Senior Projects Officer Colin Dudley, said the product allows for the option of “relining over replacing many of our sewer lines, with far less disruption to traffic flow and no road reinstatement required”.
The AM-LINER II is PipeTech’s exclusive product range, with the company being the sole licenced distributor in NZ.
This article was featured in the September 2020 edition of Trenchless Australasia. To view the magazine on your PC, Mac, tablet or mobile device, click here.
The sewer works are being completed by local contractors Adept Civil Group and Harris Civil Pty Ltd, with the new bored sewer and upsized existing sewer via pipe cracking set to provide permanent outfall to the Hart Precinct development area.
SMEC Urban Renewal Melbourne Manager Scott Carne shared the video on social media, thanking Adept Civil Group Managing Director Anthony Panozzo for the video of Adept’s bore rig at work.
“SMEC Urban communities have delivered urban design, survey and civil engineering services for the Hart Precinct industrial development which will be another key precinct within the award-winning Essendon Fields development,” said Mr Carne.
Mr Panozzo added that it was a “great project to be a part of” and congratulated his team on the works.
AUSJET Managing Director Gary Fitz-Roy said the decision came after a Zoom meeting regarding the Melbourne exhibition that discussed the recent outbreaks of COVID-19 and announcements of various borders closing due to relatively small numbers.
“We can see there is a still a way to go before we have complete confidence in the event proceeding without any impact,” said Mr Fitz-Roy.
“With the best interests of the industry, and specifically the return of exhibitors committed to AUSJET in mind, we are announcing that the AUSJET21 exhibition and conference will be rolled over to 30 – 31 March 2022 with an unchanged venue at the Melbourne Showgrounds.
“We believe this will allow the various buying sectors to recover, take stock and solidify confidence in their interstate travel plans, with those wishing to attend being able to attend unrestricted, enabling us to present the inaugural event in an even bigger and more comprehensive format that it deserves.”
The decision will allow sponsors, exhibitors and the AUSJET association more time to plan and build the event, and AUSJET said it will continue to put the success of next year’s event at the forefront of considerations alongside public safety.
AUSJET recognises the change in dates may not be suitable for all and apologises for any inconvenience this decision may cause.
Inspecting large wastewater pipes is a difficult task and, despite stringent safety requirements, remains one of the most dangerous tasks Sydney Water undertakes.
Regardless of these difficulties, wastewater inspections are essential to provide the information required to budget and prioritise repairs and maintenance, which prevent leaks, blockages and overflows.
Sydney Water said it has been working with its partner IP Pipes to keep its employees safe, searching for a technology-based solution that mitigates the need to send teams underground.
“We’ve found a way to check the state of the pipes without entering them,” said Sydney Water.
“The answer is – the RACER.”
The RACER – Rapid Assessment Condition Evaluation Robot – is the result of recent developments in photogrammetry and sonar technology; it collects images and sonar data with a special free floating camera, which are then converted into 360 degree vision and 2D view with sonar data.
“It enables us to gather enough information for detailed engineering assessments, without having our employees tramp through the underground network,” said Sydney Water.
“This allows the operator to view the pipes as if they were inside it themselves, without having to get wet or be at risk.”