Take charge of defective private laterals

An innovative web application that provides real control of private lateral RDII programs has been developed by ProjectMax, a specialist investigation and rehabilitation consultancy.

The drainBoss.net web application offers the means to integrate investigation management, information management and a process for monitoring and controlling the repair of defective drainage. A feature of the application is an “÷interactive’ map that provides an at-a-glance view of the progress of a project and the status of any repairs.

Private laterals

Tackling private laterals can be a minefield. Achieving or not achieving the targeted reduction of RDII can depend on the strategy implemented for managing the investigations, handling the data collected and controlling the remediation of the defective laterals. ProjectMax, building on their experience in inflow and infiltration programs, has developed a serious application designed to help utilities meet their goals.

Director of ProjectMax, Steve Apeldoorn, said “For several years we have been developing our own tools for managing RDII projects because there just has not been anything available in the market. This is the first time an application like this is available that can really provide a solution to utilities specifically designed for private laterals.”

The drainBoss.net application offers many advantages over conventional desktop applications. Contractors can directly input data and upload documentation to council against a property without the need for transferring mountains of paperwork or double handling. Also, there is no need to download or distribute software to everyone that needs access, in the internet browser all that is needed is a password. Users can access the application from any internet connection, including out in the field. Finally, the security of the council network is maintained; the system allows external users to provide and retrieve project specific information while a firewall protects the council’s corporate systems.

“Even a relatively small project can generate thousands of records,” said Mr Apeldoorn. “File sizes can get pretty large; a couple of mini-catchments can add up to three gigabytes of data alone, and that’s a lot of space to take up on the network for long periods of time. drainBoss.net resolves this problem by storing data on remote servers that are secure and provide excellent value. The data, of course, always remains owned by the clients.”

ProjectMax has ensured that drainBoss.net is set up to suit individual client processes. “Dependent on what stage a client is at in implementing an RDII program, we are also able to work with them to develop an RDII strategy for their organisation and a methodology for implementing investigation and remedial plans right down to a specific catchment level. We can even help administer the program if required,” said Mr Apeldoorn.

Listening for leaks in Melbourne

City West Water, South East Water and Yarra Valley Water are using listening sticks, which can detect a leak from a water meter or hydrant, and ground microphones, which listen for leaks through the surface.

The precise locations of leaks are determined by a “÷leak correlator’. Once the leak is found, the water retailers send a maintenance crew to fix the problem.

Yarra Valley Water

Yarra Valley Water has invested over $A300,000 in its annual leak detection program. The company has combed around 2,600 km of its water reticulation system to identify and repair leaks, which will result in savings of approximately 700 million litres of water per year.

Yarra Valley Water Managing Director Tony Kelly said that the leak detection program is part of the company’s wider strategy to reduce water losses in the system.

The strategy also involves a five-year, $A9 million Pressure Management Strategy to reduce excessive pressures in the network, and annual programs including a $A330,000 zone metering program to segment the network into smaller zones to target the leak detection program, a $A25 million Water Main Renewals Program, and a main to meter replacement program that will replace customers’ old pipe work from the main.

“This year we have almost tripled the number of kilometres of pipes assessed for leaks, and over the last two years we have identified around 1,700 leaks which has resulted in significant savings,” said Mr Kelly.

Yarra Valley’s leak detection program covers the identification and repair of leaks in areas reporting high water readings; targeted suburbs are identified using data from Yarra Valley Water’s zone metering program which uses dozens of in-ground flow meters.

A specialised team of ten work in pairs, using the listening sticks and ground microphones. This year Yarra Valley has trialled “÷Enigma’, a real time “÷leak correlator’ brought over from England that has an in-built computer and can locate the source of the leak immediately.

Other technology trialled from England this year included Leak Sizer, a digital ground microphone that can estimate the flow rate of the leak, once the location has been detected.

Managing Melbourne

Speaking on behalf of the three retailers, City West Water Managing Director Anne Barker said “Last summer, Melbourne experienced a high number of leaks, due to extremely dry conditions, causing pipes to crack or move out of alignment.”

The companies said that since the leak detection program started in 2003, they have checked over 23,000 km of water pipes and found and repaired almost 6,000 leaks.

SRWP tunnels provide water windfalls

The State Government regional infrastructure project will enable water to be shared among five local council areas – Brisbane, Gold coast, Ipswich, Logan and Scenic Rim councils – moving water from areas of surplus to where it is needed most.

These councils have enjoyed the prosperity of booming populations, a trend that has been accelerating over the last few years. At the same time, they have struggled to manage allocations of an ever-diminishing drought-affected water supply. However, from the start of next year this struggle will ease with the ability of the pipeline owner, the Queensland Bulk Water Transport Authority (trading as LinkWater), to transfer water over an area covering more than 7,500 sq km.

The Southern Regional Water Pipeline Alliance (SRWPA) Program Director Paul Tracey said the project broke new ground with its microtunnelling, tunnel boring and pigging techniques.

“The tunnelling crews have done an outstanding job building ten microtunnels in challenging conditions within very tight time frames, including crossing four rivers and twice crossing the Pacific Highway,” said Mr Tracey.

Ground conditions associated with sinking shafts for river crossings required substantial temporary works to support soft, wet alluvial ground conditions on steep river banks and to create a cut-off against the ingress of river water.

Microtunnelling

The SRWP project completed ten microtunnels in only 18 months. The tunnels have a combined distance of more than 2.2 km and depths of up to 30 m. These tunnels cross four rivers, four roads, a major motorway, including the on and off ramps and the main rail line between Brisbane and the Gold Coast.

As the project was operating on a fast track schedule, tunnelling involved 12 hour shifts that operated 24 hours a day, six days a week, with staff rotating shifts for 12 months.

Some sites were limited in size due to their proximity to suburbs. This meant the crews could not stockpile pipes and had to organise daily deliveries. These smaller sites also determined the positioning of cranes. Instead of having mobile cranes move around the site, the crew secured one crane in an optimal location to operate as needed. They further reduced project risk by implementing physical and mechanical lookouts, as well as proxy volts that sense overhead power lines and automatically shut down the crane whenever the boom comes within a predetermined distance of the hazard.

Tunnel boring

Two Herrenknecht AVN 1500TB microtunnelling machines were put to use 24 hours a day for 14 months, reverting to 12 hour shifts in built up areas.

Both tunnel boring machines (TBMs) operated using a slurry system and were predominately set up for hard rock and mixed ground conditions. The TBM cutters and the slurry system faced high wear risk due to the abrasive nature of the rock. For this reason, a cutter overhaul workshop was set up to rebuild cutters and maximise the potential reuse of parts. A substantial consignment of spare parts for the tunnelling equipment and solids separation equipment was stored onsite to ensure the workshop could immediately respond to maintenance needs.

Mr Tracey said the project saved hundreds of thousands of dollars by recruiting staff to operate the machines, as opposed to hiring subcontractors.

“By doing the more difficult jobs in-house, SRWP built staff capability, ensured the project remained accountable for operating the equipment and better managed potential issues.”

In total, the project conducted 320 vertical metres of jacking and bored 2,382m of tunnel. This included 25 auger bore road and rail crossings of lengths from 30m to 125 m, with a total installed length 1,346 m.

Hyperbaric tunnelling

To manage the hyperbaric conditions involved in microtunnelling, the SRWP project partnered with the Wesley Centre for Hyperbaric Medicine (WCHM) to conduct comprehensive risk assessment.

This assessment helped ensure crew safety by developing procedures, formally certifying machinery and coordinating medical requirements.

The TBMs were certified by the WCHM to ensure the machines complied with work place health and safety regulations and a decompression chamber and hyperbaric medical support were provided on a 24/7 basis during the tunnelling operation.

The SRWPA also co-ordinated all life support systems and support personnel, organised “÷dive’ medical assessments for the caisson workers, lock operators, paramedic and intensive care nursing staff and established and practised an emergency evacuation exercise with SRWP staff.

Pigging

The first challenge for the crew was incorporating the pigging runs into a tight schedule of SRWP works

Mr Tracey said that there are no applicable standards that relate to pigging, only proven operating methods and procedures taken from lessons learnt in the past.

“So you do feel a bit as if you’re working without a benchmark, which can be both daunting and liberating,” said Mr Tracey.

Prior to the works, extensive pigging trials were completed to select the pig type and size used to ensure there was no damage to the bituminous coating to the cement lining inside the mild steel pipe. A pig’s diameter is traditionally designed to be larger than the pipeline. The SRWP crew tailored the pigs to reduce the oversize and avoid “÷snags’ while still being able to pig efficiently. The pigging crew was able to condense the program to gain schedule efficiencies.

Additionally, as a result of the relatively clean pipeline installation, the pig was able to be used without an initial high velocity flush behind the pig, practically halving the time normally taken to do this task. Water flow was controlled by using the pipeline’s temporary valves to manage water pressure in the pipes.

The pigging crew completed their activities as scheduled. The longest pigging run measured 16 km, taking around nine hours and 15.5 megalitres of water to complete.

After pigging, the pipelines will undergo testing and commissioning. All SRWPA projects will have finished commissioning by 31 December 2008.

High pressure water cleaning tests on T seals and patch lining

Reticulation sewers are predominantly 150 mm to 300 mm in diameter and the rehabilitation of these systems has generally involved the installation of tight fitting structural linings. If a continuous lining system, such as Kembla Watertech’s EX method, is installed then all root penetration and water ingress through faults, such as cracks and defective joints, will be completely eliminated. If this lining operation is then followed by the installation of a junction T seal system then root penetration and water ingress are also eliminated up to the first joint; the limit of responsibility for most authorities.

The only remaining point of concern with respect to ongoing maintenance is the possibility of root penetration from further up the branch line. While this is the responsibility of the property owner, these roots may grow down the branch and into the mainline, causing blockages.

The length of linings now installed measures thousands of kilometres, while the number of T seals numbers in the tens of thousands. When Sydney Water sends out a crew to respond to a sewer blockage, there is an increasing likelihood that the sewer has been lined and may also have T seals installed. Sydney Water has therefore asked its two SRP2006-2009 term contractors, Kembla Watertech and Interflow, to undertake testing to determine safe cleaning pressures that will then be specified by Sydney Water when cleaning and/or whether root removal is required in any of their lined sewers.

Any recommendation needed to take into account that Sydney Water cleaning crews do not carry CCTV survey cameras. This means that when called out to a choke, they are operating “÷blind’. It was also requested that the companies include short form patch linings into these tests. The results of these tests are important to the industry as a whole, not just Sydney Water.

Components to be tested

For some time now the installation of T seals at junction cut outs in lined pipes has been a contractual requirement of most authorities. Kembla’s T seal system is called Tiger T.

The resin impregnated patch is placed over a purpose built packer, which is then transported into the sewer and positioned at the location of the connection using a small camera or other means. The packer is inflated, which pushes the T seal out and into the branch connection. It is held in this position until the resin has hardened, at which time the packer is deflated and retrieved.

In those instances when only a localised fault is found in an otherwise serviceable pipe, a short form structural patch can be effectively used instead of lining the entire pipe length. This type of patch is offered by many companies under a variety of names.

The fibre reinforced plastic (FRP) patch, after being impregnated with a suitable resin, is wound around a rubber sleeve and placed at the repair point using a CCTV Camera Unit. The sleeve is then inflated and held in position until the curing process is complete.

The material composition of the Kembla systems to be assessed was divided into three categories. The first material was the Ex method lining, consisting of a PVC of a similar grade to standard sewer grade pipe. The second material was the Tiger T junction seal, with fibrous open weave tubing impregnated with silicate resin. The final material assessed was the Tiger patch short form repair, with glass fibre reinforcement fabric impregnated with vinyl ester resin.

It was agreed between Sydney Water and Kembla that three separate tests would be undertaken. The first tested the Tiger T seal inside a pipe but above ground at Kembla’s Strathfield Depot. The second test was conducted onsite with a Tiger Patch installed by Kembla some six months ago into a sewer at Roseville. The final test was performed on a Tiger T installed twelve months ago into a lined sewer pipe at Punchbowl.

Jetting Nozzles

Kembla has been conducting R&D trials on a robotic branch cleaning device imported from Germany. To this end, a number of 150 x 150 Tiger T’s had been installed into a 150 mm VC pipe set up in the yard of the Strathfield Operations Depot. The VC pipe had been lined with Ex prior to installing the Tiger T’s to simulate an actual field installation. It was decided to utilise this existing set up for the first test, which was witnessed by a number of Sydney Water personnel.

Test Procedure and Results

In the first test the CCTV camera was run through the line to record the condition of the Ex lining and Tiger T before any cleaning. The “÷bomb’ nozzle was fitted and two passes, up-back, were made at a pressure of 7,000 kPa (1000 psi). Normal cleaning procedure is one pass but as the test was trying to find the safety limits, two passes were carried out. The pipe was resurveyed and it was agreed by those present that there was no change in the condition of the Ex lining or Tiger T. Another two passes were then made at 10,500 kPa (1500 psi). Again there was no change in condition. Another two passes were made at full pressure of just under 14,000 kPa (2000 psi). There was still no damage or change in condition that gave rise to any concern. The plastic coating on the Tiger T lining material showed minor separation at one location but there was no structural damage or any sign of lifting to the leading edge of the Tiger T itself. Sydney Water crews carry a “÷warthog’ nozzle, so the “÷bomb’ nozzle was replaced with the “÷warthog’ and two passes made at full pressure (just less than 14,000 kPa). The Ex lining showed no effect whatsoever.

It was observed that there was additional deterioration in the plastic coating, but no structural damage. The consensus was that while the warthog could be used under extreme conditions, it was probably prudent not to recommend it as a routine method. The final test was then made by carrying out two passes with a root cutter fitted. Under this extreme test condition there was no damage to the Ex lining but some minor damage to the Tiger T. The recommendation would be to use a root cutter only as a last resort and then have in place a procedure that required a CCTV survey to be carried out to check on the condition of the pipe at the location in question.

The photos on page 40 are from the CCTV after root cut i.e. after two passes with the “÷bomb’ plus two passes with the “÷warthog ‘ plus two passes with the root cutter.

Test two was the onsite test of a Tiger Patch. The trial was carried out using exactly the same procedure as test one and was witnessed by the same personnel. The Tiger Patch was located approximately 1.5 metres from the access chamber. The patch suffered no adverse effects from any of the tests.

Test three, a repeat procedure of test one, was performed inside a sewer lined with Ex and with a Tiger T fitted. This final test was completed in the second week of October. Again, no damage was caused by the two passes, using the “÷bomb’ and the “÷warthog’ nozzles at the pressures of 7,000 kPa and 14,000 kPa.

Conclusions

A full report including CCTV video of the tests is being prepared for Sydney Water; however, the results are of importance to all authorities. Therefore, Kembla wanted to present this summary report as soon as possible. The various cleaning tests had no effect on the Ex lining whatsoever. This is not unexpected because the PVC material used in Ex pipe is essentially the same grade as standard sewer grade PVC pipe. PVC is now the material of choice for new reticulation sewer pipes, which means the Ex lining should perform the same as a new sewer pipe.

After numerous passes at a pressure of 14,000 kPa using a standard cleaning nozzle, the “÷bomb’, the Tiger T’s were unaffected. Some minor superficial damage was noted in the above ground trial after the “÷warthog’ nozzle was used and so the routine use of the “÷warthog’ will not be recommended by Kembla. However, it was of comfort to Kembla, as to well as the Sydney Water personnel present, to observe that if this method of cleaning is used accidentally, then the Ex lining and Tiger T should not be adversely affected.

No detrimental damage was caused to the Tiger patch by the “÷bomb’, the “÷warthog’ or the root cutter. This result confirmed the effectiveness of this type of repair.

Current Sydney Water policy is not to root cut a lined pipe. As already mentioned, an Ex lining is in reality a sewer grade PVC pipe without any joints for the entire manhole to manhole length. Therefore, and as observed in the tests, root cutting within an Ex lined pipe will not present a problem to the lining itself. Root cutting through a Tiger patch was observed to be acceptable. Root cutting through a Tiger T should only be used as a last resort.

Where to for telecommunications and the trenchless industry?

The State of the Industry report into Trenchless Technology, presented to the No-Dig 2000 conference, showed that the telecommunications industry accounted for over 80 per cent of the Trenchless Technology industry.

By 2000 the telecommunications industry had invested large sums of money in long-distance communications networks involving optical fibre and cable installations. Telstra, Optus and other industry providers have seen, tested and proven mini-HDD and HDD as technologies with immense time and cost savings benefits as well as substantial social and environmental benefits.

The report, prepared by AWT Engineering Pipelines for the ASTT, said that while cable ploughing over long “÷green fields’ corridors is the most economic method of installation in most cases, the use of HDD for waterway crossings, ocean cable landfalls, roadway crossings and within highly-developed and infrastructure congested areas has enormous advantages.

At the time of the report over 800 kilometres of directional drilled installations had been carried out for the telecommunications industry with large percentages of that total being completed for Telstra and Optus. However, suppliers of directional drilling equipment reported a slowing down of work for the telecommunications industry at that time.

The National Broadband Network

The Australian Government has said it will provide up to $A4.7 billion to establish the National Broadband Network (NBN). The Government will also consider necessary regulatory changes to facilitate the roll-out of a new open access, high-speed, fibre-based broadband network, providing downlink speeds of at least 12 megabits per second to 98 per cent of Australian homes and businesses. On 11 March 2008, the Minister for Broadband, Communications and the Digital Economy Senator Stephen Conroy announced the panel of experts to assess proposals to build the NBN.

The scope of the NBN will include;

  • the delivery of minimum download speeds of 12 megabytes per second to 98 per cent of Australian homes and businesses
  • support high quality voice, data and video services including symmetric
  • applications such as high-definition video-conferencing
  • earn the Commonwealth a return on its investment
  • facilitate competition in the telecommunications sector through open
  • access arrangements that allow all service providers access to the network
  • on equivalent terms, and
  • enable uniform and affordable retail prices to consumers, no matter where they live.

The successful bidder must also have the network rolled out and made operational progressively over five years using fibre-to-the-node or fibre-to-the-premises technology. The Federal Government has gagged the competing NBN bidders, Telstra and consortium Terria, from commenting on the biding process.

The Government is also in the planning stages of the Fibre Connections to Schools (FCS) initiative, which complements the National Broadband Network process. Through the Digital Education Revolution (DER) policy, the Government has committed $A100 million to the FCS initiative, which will contribute to the provision of fibre-to-the-premises broadband connections to Australian schools to deliver speeds of up to 100 megabits per second. In addition to providing fibre to schools, the DER policy states that “schools in remote areas will receive a standard of service, which depending on available technologies such as fixed line, wireless and satellite, will be as close as possible to the standard provided by the National Broadband Network” of 12 megabits per second.

Regional telecommunications review

The executive summary of the Regional Telecommunications review concluded that mobile telecommunications services are not equitably available in many parts of regional Australia.

The review identified the following issues;

  • a lack of any ongoing assurance of service availability – the current Federal Government initiatives addressing inequitable access tend to be short term
  • a limited geographic terrestrial mobile phone coverage in regional areas, in particular for hand-held mobile phones – an issue exacerbated by aspects of the promotion of the extent of coverage, and
  • high prices and service difficulties with mobile satellite services – mobile satellite services do provide Australia-wide coverage, but there is a question whether this service is currently adequate.

The recommendations of the review board included that the Federal Government work with state, territory and local governments to better incorporate the roll-out of telecommunications infrastructure, such as the roll-out of optical fibre during railway extensions, and upgrades to services and the planning of other major infrastructure developments in regional areas. Furthermore the review recommended that the Australian Government work with state, territory and local governments to better coordinate the activities of resource companies and telecommunication service providers to facilitate shared planning and provision of telecommunications and services in regional areas.

To the future

The various initiatives in development may indicate another period of growth for the trenchless industry during the extension of the telecommunications industry in Australia.

Tunnelling Melbourne’s future

The NSP is being jointly delivered by Melbourne Water (Stage One) and Yarra Valley Water (Stage Two). The John Holland Group has been awarded the contract to construct both stages of the NSP. The NSP will help protect the Merri and Moonee Ponds Creeks from the damaging impact of sewage overflows that can occur after heavy rain as well as provide for additional capacity to the Northern suburbs.

The project involves the construction of approximately 13 kilometres of new sewer pipes ranging in diameter from 1.6 to 2.5 metres. The sewers are generally located along the Merri Creek Valley and Moonee Ponds Creek, from Reservoir to Essendon. Eight major access shafts of up to 65 metres in depth and 13 metres in diameter will also be constructed across stages one and two.

The NSP is one of a number of future projects to be delivered under a collaborative arrangement between John Holland, Melbourne Water and Yarra Valley Water. Project Managers Connell Wagner and design partners SKM-Jacobs are working with John Holland to deliver this project.

Site selection

Community Relations Manager for the NSP Trent Woodberry said that a thorough site selection and extensive consultation process was undertaken by Melbourne Water and Yarra Valley Water to determine the route of the sewer and the worksites, prior to construction. This process involved local councils, community groups, Vic Roads, Environmental Protection Agency Victoria, Local Councils, State Government departments and local Members of Parliament.

Working with the community

Mr Woodberry explained that one of the biggest challenges is running 24 hour operations in an urban environment. “Many of our project sites are located in densely populated areas, meaning that community engagement is of the utmost importance.”

Seeking to minimise the potential impacts on the community was a major factor in the planning and design of the project and continues throughout the construction phase. Community forums are held on a regular basis to provide opportunities for residents and businesses near the shaft sites to receive updates on the project, and raise any questions or areas of concern. Community members attending these sessions have provided useful feedback on ways in which the project can minimise possible impacts.

The NSP team have also involved local schools as a key partner to the project by offering them an opportunity to name the three Tunnel Boring Machines (TBMs) to be used for construction. Local Primary School students in grades 1 to 3 were invited to colour in and name the TBMs. The chosen names were TBM 1 – Victoria, TBM 2 – Gemma and TBM 3 – Julia.

Managing the environment

During the project’s planning phase a number of detailed investigations were completed including an environmental assessment, which incorporates a biodiversity study, and archaeological and heritage studies. These studies provided the basis for the development of an Environmental Management Plan which guides how construction work will be undertaken to minimise the potential for environmental impacts.

Numerous geotechnical investigation studies were undertaken prior to the commencement of tunnelling activities, in order to ascertain what sort of geotechnical conditions were likely to be encountered during underground construction. The project is tunnelling at depths of between 19 – 65 metres across both stages, through variable geology including basalt, alluvium and Silurian sedimentary formations. At various points the project will be required to tunnel through basalt up to 270 MPa and also water bearing alluvial’s.

Constructing the tunnels

Three state-of-the-art TBMs have been specially designed and commissioned for use on the NSP: two Herrenknecht Earth Pressure Balance (EPB) TBMs and one Robbins Hard Rock TBM.

These TBMs are highly advanced and designed to operate in specific geological conditions. The Herrenknecht TBMs are designed to operate in mixed ground conditions, while the Robbins TBM will be used to excavate through hard rock, such as the basalt conditions expected on Stage Two.

Stage One – Melbourne Water

John Holland began construction on Stage One of the NSP in August 2007. Stage One involves 8 kilometres of sewer tunnel connecting to the existing sewerage system near Merri Creek at Coburg and the Moonee Ponds Creek at Pascoe Vale. The crews will use the two Herrenknecht EPB TBMs to complete Stage One.

Shaft excavation is underway or has been completed at three of the five NSP Stage One sites. Tunnel construction on the 1.6 kilometre tunnel length from De Chene Reserve, to connect to the Carr Street shaft is well underway. This tunnel is being excavated using an EPB TBM “÷Victoria’, which is the first to be used on the project. “÷Victoria’ is anticipated to reach the shaft site in Carr Street towards the end of 2008.

To facilitate 24 hour tunnelling operations three sophisticated acoustic enclosures have been constructed over the three main shafts. The bored piling works at the Bass Street and Vanberg Road sites have also been completed, ahead of schedule.

Stage Two – Yarra Valley Water

Stage Two of the NSP is a 4.6 kilometre long, deep-tunnelled sewer running from Carr Street in Coburg to L.E. Cotchin Reserve in Reservoir. It will connect to the Stage One works at Carr Street and will have a finished diameter of 1.8 metres.

In September 2007, John Holland signed a contract with Robbins for a 3 metre double shield TBM, with back-up, spare parts and cutters. The Robbins TBM will be launched from a 31.5 metre deep shaft at the Newlands Road job site.

Four access shafts of up to 39 metres in depth and 10 metres in diameter will also be constructed, enabling two specially designed TBMs – Julia and Victoria – to be utilised during construction. Drill and blast techniques are being used to excavate some of the tunnels, launch chambers and shafts.

Completion of the project is timed for mid 2012.

Harker underground in Timaru

In April, the team began work on the Timaru District Council’s $A14 million main trunk sewer upgrade. The project consists of three drives, all approximately 400 m in length. They are spread from the Washdyke Lagoon to Caroline Bay. The Harker team is scheduled to complete the job by the end of July 2009.

The team started from the lagoon end and headed south, using drill and blast for the first 150 m. The team then split and half headed north with an EX50 to eventually meet in the middle. Harker has also completed 106 m of open cut at the start of the most southern drive. This will be laid in 2.5 m OD concrete pipe and used for access into the ringbeam and lagging tunnel.

Project Manager Mr Bishop says that they are working 24 hours a day on the tunnel boring machine and day shifts on the conventional section. “The tunnel face is a split of clay and fractured basalt. Although the rock proved difficult to blast due to the clay seams, we have been averaging about 1.5 m per shift.

“The open cut had to be extended as we encountered some unexpected boulders in fill material; otherwise it’s been as the geotechnical reports predicted. We are enjoying the challenges of the job, which is both drill and blast with sections of ringbeam and lagging.” Harker now has 20 men onsite.

The company also has a $NZ10 million project underway for Auckland City – a storm water system upgrade – as well as a $NZ7 million sewer pipeline upgrade for North Shore City.

Trenchless Australasia 2009: fantastic speakers, footy, food and fashion

Trenchless Australasia 2009, the 8th National ASTT Conference and Exhibition will take place at Melbourne Park from 20-22 September, 2009. Delegates are guaranteed to take plenty away from the conference program, featuring a range of speakers covering projects, technology, the latest developments, policy and more.

With the confirmation of the keynote speakers for Trenchless Australasia 2009, the high quality of the technical program is guaranteed. Read on for an introduction to your keynote speakers.

The event has attracted sponsorship from the leading movers and shakers in the trenchless industry.

Platinum sponsor Interflow will hold 36 square metres of exhibition space and will sponsor the Gala Dinner. Gold Sponsor Vermeer is hosting the River Cruise. Parsons Brinckerhoff is a bronze sponsor and will provide Melbourne’s famous coffee. Other sponsors include Digital Control Incorporated and Westnet.

Old problems new solutions

Trenchless Australasia 2009 is honoured to have Dr Dec Downey, ISTT Chairman, as a keynote speaker. Dr Downey will share his considerable knowledge and expertise on the topic “÷The contribution of Trenchless Technology 21st Century pipeline construction and rehabilitation’. Dr Downey is back by popular demand following the very successful ASTT Roadshow.

“We often speak about the challenges of ageing underground infrastructure and the benefits of our technologies in addressing urban renewal with a minimum of disruption, but there is much more to say about the contribution of Trenchless Technology to the maintenance of existing networks and the construction of pipelines for the future,” said Dr Downey.

“Many of today’s problems can be attributed as much to the historic choices of materials and methodology available at the time of construction as to time-related deterioration and shortcomings in construction supervision. With the clarity of hindsight we can identify some of our past mistakes and build on this hard-earned understanding to do better for our communities and the trenchless option has so much to offer in these initiatives.

“Trenchless methods facilitate construction with less joints or better made joints, with potentially more durable materials and with less reliance on hard-to-supervise skills in the darker corners of the underground. Today we have improved geotechnical exploration and utility location skills, though further development is required. The practices of microtunnelling, pipe ramming and HDD have improved substantially. Modern pipe materials properly installed by these methods must surely offer sustainable solutions to the challenge.

“We have an increasing tool box of technologies to address ageing pipelines and provide lasting solutions to these problems. While condition assessment and service connection reinstatement remain challenging many of the rehabilitation techniques we use have been tried and tested over a considerable length of time and our retrospective evaluations can underpin service life predictions. New techniques continue to evolve along with our understanding of the pipe-soil interface. We have high hopes for emerging structural spray and reinforced linings.”

Dr Downey has worked in the pipeline business for more than 35 years, initially involved in the development of jacking pipe and confined trench construction methods he contributed to the Institution of Civil Engineer’s Conference “÷Restoration of Sewerage Systems’, participated in the first No Dig Conference “÷Trenchless Construction for Utilities’ in 1985 and was amongst the first members of the ISTT. He has served as UKSTT Chairman 1999-2001, ISTT Vice Chairman 2005-2007 and is the current ISTT Chairman. Dr Downey serves as a member of the Pipeline Industries Guild Utilities Panel and is a member of the CIWEM Editorial Board.

Dr Downey is a Principal at Jason Consultants Group, where he specialises in projects concerned with all aspects of pipeline rehabilitation including research and development, licensing and technology transfer, liner manufacturing and installation.

Dr Downey has worked for Insituform Technologies Inc. (ITI) in the field of CIPP since 1987 and as a consultant with the Jason Group on a wider range of renovation and pipe replacement methods since 2003. His development team at ITI pioneered pull-in and inflate methods, light curing, controlled head inversion pressure equipment, pressure pipe lining materials and methods and procedures for large diameter installations. He has had substantial involvement in the establishment of test methods, specifications and standards for CIPP. Educated at The University of Bath in the United Kingdom, Dr Downey has travelled extensively, working in Europe, North America and particularly Asia. He brings a global perspective on experience with CIPP and other rehabilitation systems.

Recent training courses on CIPP and other renovation and construction methods have been delivered to San Francisco Public Utilities Commission, Hong Kong Gas and the Ministry of Energy Water and Communications, Malaysia. Current projects include Rehabilitation Advisor to Wessex Water, Project Engineer, TBE Consortium, City of Largo Florida and technical advisor to Mouchel Parkman for the UKWIR large diameter mains failure study.

Sustainability

Dr Samuel Ariaratnam is currently the Vice-Chairman of the ISTT, as well a Professor at the School of Engineering at Arizona State University and has been a keynote speaker at many trenchless events all over the globe. Dr Ariaratnam’s presentation promises to be a highlight. He is no stranger to Australasia and his last presentation at a major event down under was at the 2006 International No-Dig in Brisbane.

Dr Ariaratnam is one of the world’s leading trenchless academics, his research is in the area of “÷Sustainable Urban Underground Infrastructure Systems’. He has recently undertaken ground-breaking research on the use of optimisation techniques and performance models to evaluate and develop improved construction strategies/methods for installing, assessing, rehabilitating, and repairing underground infrastructure systems including sewer/water systems, fibre-optic cables, pipelines, electrical lines, and gas lines. Particular focus is in trenchless engineering applications of HDD, pipe replacement, and underground asset management.

Well-known as a trenchless guru, Dr Ariaratnam has played a key role in raising the profile of the industry through his tireless promotional efforts. He is an engaging and entertaining speaker and his speeches are always a highlight. His experience and contacts mean that he has a strongly international perspective on the trenchless industry and is well versed on the varying local conditions that affect the sector.

His professional experience ranges from time with the United States Army Corps of Engineers to copious publications in refereed journals and conference papers. He serves on numerous boards and panels making various technical and funding decisions. Additionally he has consulted to many major companies and municipalities and has acted as a professional witness in many legal cases. Dr Ariaratnam also holds a number of patents.

Lessons from Singapore

Tan Thai Pin is the Director of the Water Reclamation (Network) Department, PUB,
Singapore. He will draw on his extensive experience in the water industry for the benefit of the Trenchless Australasia Conference delegates.

Mr Tan graduated from the National University of Singapore with a Bachelor of Engineering (Civil). He has been working in Drainage Department and Sewerage Department, Ministry of the Environment, since his graduation in 1982, and in the PUB since 2001.

His professional experience covers a broad spectrum of water and wastewater management. This includes the development of master plans, policies and also engineering works covering planning, design, construction, operation and maintenance of drainage, sewerage and water reclamation infrastructures. He has been involved in the use of Trenchless Technology for the installation and rehabilitation of sewers since the early 1990s.

He has also been intimately involved in the NEWater (high grade reclaimed water) development initiatives since 2001. His roles in the water reclamation initiatives have included participating in the NEWater pilot study, the implementation of the NEWater projects and the operation of the NEWater Factories. He has extensive knowledge in the planning, design and operation of large scale, high grade water reclamation plants using dual membrane technologies.

Mr Tan has presented papers at international conferences held in the USA, Europe, Australia, Middle East, India, Hong Kong, and Singapore sharing PUB’s experience in integrated water management and the use of advancement technologies.

Mr Tan said “It’s always a challenge managing Singapore’s water supply due to our limited resources, especially in our land area which is required for the storage of the rainwater. We therefore have to adopt an integrated and long term approach in our water resource planning.

“Ensuring that we have an adequate sewerage reticulation system is key to our water resource management for long term sustainability in water supply, both in protecting the quality of the raw water in our water courses and in capturing the sewage for treatment and water reclamation.

“PUB has been using trenchless technologies for implementation of sewerage network projects to serve new development and for the implementation of sewer rehabilitation plays. These technologies have enabled us to carry out these projects in a cost-effective manner and with minimal disruptions to the public.

“I look forward to co-operation with the utilities in Australia and to learn from them,” he said.

Building a future from water

Ross Young commenced as the Executive Director of the Water Services Association of Australia (WSAA) in 2004. WSAA is the peak body for the urban water industry and its members provide water services to 16 million Australians – 80 per cent of the population. As an industry insider Mr Young promises to be a highlight of the conference, he will present on the investment in the water industry, now and in the future.

Mr Young has extensive experience in urban water management at a senior level, having held a number of key executive positions with Melbourne Water for over a decade. During his time at WSAA, he has raised the profile of the Australian urban water industry and has established himself as the national spokesperson on urban water issues.

Mr Young is the Chair of the Global Water Research Coalition Board and a Board Member of WaterAid Australia. He has a Diploma of Horticultural Science, a Bachelor of Applied Science, an MBA and a Graduate Diploma in Natural Resources Law from the University of Melbourne.

Dollars and sense of No-Dig

John Roskam will be addressing the economics of Trenchless Technology and the economic drivers for infrastructure construction. Mr Roskam was a popular speaker at the Australian Pipeliner Industry Association 2008 Convention, addressing the economic outlook for both the pipeline industry and the nation. Mr Roskam is sure to bring unique insight and perspective to the economics of the trenchless industry.

Mr Roskam is the Executive Director of the Institute of Public Affairs. Before joining the IPA, he was the Executive Director of The Menzies Research Centre in Canberra. He has also held positions as Chief of Staff to Dr David Kemp, the Federal Minister for Employment, Education, Training and Youth Affairs, as Senior Advisor to Don Hayward, Victorian Minister for Education in the first Kennett Government, and as Manager of Government and Corporate Affairs for Rio Tinto.

His policy analysis includes reports such as Australia’s Education Choices (with Professor Brian Caldwell) and The Protocol: Managing Relations with NGOs (with Gary Johns).

Technical talk

In addition to the keynote speakers, a technical program offering two streams on a diverse and interesting spread of topics will engage and inform Conference delegates. The topic and themes of the technical papers will incorporate new installations, rehabilitation, replacement, inspection and assessment of all underground utilities including water and wastewater, as well as communications and energy. Local and international case studies will be presented along with papers in the areas of new and emerging technology, difficult environments, solving Australia’s water crisis, new issues in design and engineering, water re-use, pipe materials and tunnelling. Non-technical topics of interest include industry skills shortages and training, contracting strategies, risk management and projected capital works by utilities.

Trenchless on show

The exhibition will feature more than 50 individual companies from all areas of the industry, including contractors and equipment providers in areas such as HDD, tunnelling, relining, pipe bursting, concrete and plastic pipe manufacturers and consultants. This year the lively and colourful exhibition will be held in one area, adjacent to the Conference. The coffee cart with professional barista, sponsored by Parsons Brinckerhoff, will be located in the exhibition hall.

Making the most of Melbourne

Melbourne itself will be abuzz with footy fever, in the lead-up to the AFL Grand Final, taking place on Saturday 26 September. The conference takes place at the end of the third and final week of the AFL finals. The grand final parade will be held on Friday 25 September. Watching the city gearing up for what is one of Victoria’s biggest sporting events is truly a sight to behold.

Venue

The event will be held at Melbourne Park Function Centre, close to the heart of the city. The Centre offers first-class facilities and spectacular views of the city skyline. The Function Centre is ideally located for transport accessibility, next door to two tram stops (route 70), a taxi rank and two pedestrian bridges linking Melbourne Park with the Melbourne Cricket Ground. There is ample accommodation available at the nearby Hilton on the Park and Mantra on Jolimont, which is just a short walk from Melbourne Park.

Social Program

Take a trip to the lush and scenic Ivanhoe Golf Course for the Great Trenchless Golf Challenge of 2009 – a leisurely or active game of 18 holes on Sunday 20 September. Both serious golfers and weekend whackers will be welcome. Lunch will be available for purchase from the golf courses cafe after the ninth hole, and a drinks cart at cost will be on hand. Experience Melbourne’s beautiful colours and spring weather in a day of fun and entertainment, a series of prizes will be awarded, including outright winner, longest drive, and nearest the pin.

The Exhibition Opening Cocktail party will officially kick off the Conference on Sunday evening as all delegates and exhibitors gather together in the exhibition area to enjoy canap̩s and a range of drinks. Meet old friends and make some new ones as the event officially gets underway, 5 pm Sunday 20 September.

One of the highlights of last year’s conference was the spirited and scenic boat cruise. This year the Vermeer River Cruise will be departing from the Docklands for an enjoyable evening of drinks and a delicious buffet dinner, beginning 7 pm Monday 21 September. Like last year, the event is dress-up and this year’s cruise will be gangster-themed so scratch up your best Scarface. From Bugsy to Capone, all guys and dolls are in for a spectacular and decadent night of fun. And Melbourne’s recent brush with Underbelly should attract another colourful cast of costumes and characters to the event.

The prestigious Gala Dinner, Tuesday 22 September at the MCG, will be the trenchless industry’s feature event for 2009. Sponsored by Interflow, the glamorous evening will include an awards ceremony, top-class entertainment and a sumptuous three course meal. This is a very exciting time in the lead-up to the AFL grand final; enjoying the same venue will only add more celebratory spirit and dynamism to the Conference. This highly enjoyable and lively night is not to be missed and provides a great opportunity to socialise before having to say goodbye on Wednesday.

Tourist information

Melbourne is a dynamic, multicultural and versatile city with virtually endless activities and entertainment on offer. Whether you are looking for an animated, energetic activity in a bustling environment or a quieter, more tranquil place to unwind, there is no chance of boredom in a town that has something to suit everyone’s tastes.

Melbourne’s many shopping options are varied and colourful; from hidden laneways to large outlets, to trendy designer boutiques and arcades. There are also a number of unique fruit, food and merchandise markets throughout the city, many of which boast an incomparable experience of Melbourne’s multicultural face. If you prefer to be shown around, there are fun and informative guided walks that point out different shopping points. For discounted designer stores there is the Spencer DFO located at Southern Cross train station. If you are looking for boutique stores and high end designer stores, take a walk down Chapel Street, Prahran and South Yarra. Bourke Street is also a popular and fashionable destination.

Queen Victoria Market is Melbourne’s premier open-air market. Located just outside the city centre, the market has everything to offer; market stalls, food, wine, regular cultural activities and more.

Enrich your understanding and appreciation of Victoria’s culture, history and natural environment by visiting the Melbourne Museum, located in the picturesque Carlton Gardens. Museum highlights include Bunjilaka – the Aboriginal Cultural Centre, and the IMAX Theatre. Opening hours are from 10 am until 5 pm daily.

The Melbourne Aquarium houses over 10,000 aquatic creatures and is Australia’s only Southern Ocean Aquarium making it a must see. The Aquarium is open from 9.30 am until 6 pm daily. Crown Casino is filled with a wide variety of entertainment options; from shopping to gaming machines to different restaurants, you will find ample diversion. You may also want to take a walk along the swanky Southbank district, which is just outside of the casino, on the banks of the Yarra River.

Take a walk in the Botanic Gardens and look at over 10,000 species and 50,000 individual plants or enjoy relaxing splendour in the grass reading a book. The gardens are recognised as one of the world’s finest botanical arrays, with 38 hectares to explore. Open daily from
7.30 am until 6 pm.

The Eureka Tower is new to Melbourne and is currently the tallest apartment building in the world. The tower also has a lookout to the city, which is open from 10 am until 10 pm with last entry at 9.30pm. The Docklands is one of Melbourne’s new up and coming entertainment districts, with cosmopolitan restaurants serving fine cuisine, and a range of retail stores.

Day Trips

If you are interested in a day tour, the Great Ocean road is an unbeatable option. Enjoy breathtaking views while travelling down one of Melbourne’s best known tourist spots. You may even want to see the Twelve Apostles. The Great Ocean road is one hour out of Melbourne so you will need to hire car or book a day tour, which can be done at www.melbournetours.com.au.

Another great day trip would be a visit to the Yarra Valley wineries. Enjoy a day of wine tasting and socialising, as well as a gourmet lunch. The Yarra Valley is one hour out of Melbourne so you will need to hire a car or book a day tour which can be done at www.yarravalleywinerytours.com.au.

TT Asia Pacific and Tenix build partnership

Tenix Maintenance Services, part of Tenix Alliance, is responsible for the installation of gas supply lines in western Victoria. Manager Jacob Bonisch welcomed John Walsh and Denis Vout from TT Asia Pacific and, they discussed the machinery, the relationship between the companies and the growth of the trenchless industry.

Mr Bonisch said “Along with our horizontal directional drills, earth displacement hammers form an important part of our trenchless capability. Having a variety of effective trenchless options is an important part of our commercial success in the modern marketplace.”

The selection

There are many different earth displacement hammers on the market. What made Tenix Maintenance Service choose TT Asia’s Grundomat machines? Mr Bonisch explained that an important component of the selection process was a side-by-side trial in a variety of soil conditions. Three hammers were trialled, comparing the time taken and the accuracy of the equipment.

“The genuine Grundomat earth hammers were the stand out performers. The Grundomats left the other two for dead. For us, it was a reasonably obvious choice in terms of actual time on the job,” said Mr Bonisch.

“While the Grundomat was not the cheapest option in the market, our driver was a total life cost that took into account the time savings in completing the bores in the field, the frequency of required servicing and the lifespan of the asset.”

The speed of the road crossing and the availability and reliability of the machines was an important factor in the selection process.

Other than a shovel, the earth displacement hammer is the most common tool on the Tenix Maintenance Service truck. Every truck has at least one Grundomat and some trucks are running two for the different sizes – 55 and 75.

In choosing the genuine Tracto-Technik Grundomat product, Tenix Maintenance Service reduces the long term costs as the hammer has been proven reliable and accurate.

“For us, time is money. A crew that is constantly waiting for repairs on earth displacement hammers is not an acceptable or productive outcome. We need strong performance and reliability from our trenchless tools,” said Mr Bonisch.

Tenix Maintenance Service is equipping its maintenance trucks with the Grundomat earth displacement hammer. The delivery of 46 hammers will ensure efficient and effective installation of gas supply lines.

In business

The business relationship ethos of both companies is founded on a desire for long term mutual benefit. Mr Bonisch says that in business, companies can choose to make a lot of money over the short term or companies can aim to make a reasonable amount of money over a very long time period. “We, at the heart, are a relationship company and with our clients we build long term relationships,” he says.

For example, Tenix Maintenance Service has had the same material provider and the same plant provider for six years. In recognition of the reality that their suppliers need to make a profit and stay in business, Tenix Maintenance Service values long term relationship over short term cost cutting.

“At both our customer end and our supply end we try to build long term relationships,” says Mr Bonisch.

In response, TT Asia Pacific National Sales Manager John Walsh commented that it is progressive, intelligent companies that choose to purchase TT Asia Pacific’s German manufactured equipment – companies that rely on the quality, durability and reliability of TT products. “You can not afford to have this type of machinery fail underground,” says Mr Walsh.

The trenchless advantage

Mr Bonsich explains that the company views trenchless as the way to go, due to the demand of councils, consumers, residents and other stakeholders and various environmental constraints. “This is why we are manning up in terms of our trenchless capability. We recognise that earth displacement hammers, such as the Grundomat, are an essential part of being both cost effective and time effective in terms of getting things done and also keeping the various stakeholders happy,” he says.

Mr Walsh highlights the benefits of Trenchless Technology for companies such as Tenix Maintenance Service, companies which are responsible for installing essential services such as electricity, gas and water.

The Grundomat enables Tenix to install gas supply lines under roads and driveways. The hammer can enter off the street, under fences and landscaping, eliminating the need to remove paving and other hard made services that are expensive and time consuming to reinstate.

“The Grundomat takes away the necessity of digging up people’s driveways or roadways. It will cut inconvenience. Once you have bored under a road with a Grundomat there is no ongoing maintenance,” says Mr Walsh.

The average drive with the Grundomat takes 30 minutes per 12 metres, depending on soil conditions.

The trenchless option also significantly reduces the cost of the job. For example, the cost to reinstate a concrete driveway is approximately $A175 per square metre. “So to be able to put a service in without having to have any reinstatement costs is a massive commercial benefit,” says Mr Bonisch.

In the future

Tenix is looking to use the earth displacement hammer across other applications, for example in an electrical environment to put in conduit, to supply domestic electricity and to install fibre-optic cable. Tenix Maintenance Services is currently in discussions with Tenix Alliance Power. Tenix Alliance Power does approximately 100 road crossing applications per month.

Mr Walsh believes that TT Asia Pacific and the trenchless industry in general will continue to expand in Asia and Australia.

“In Australia communications and essential services will continue to grow [despite the economic downturn], and therefore the trenchless industry will also continue to grow,” he says.

Sydney Olympic Park: remediation

The Sydney Olympic Park Complex is served by a comprehensive stormwater drainage system that covers all road, parkland and building drainage needs for the site. Apart from the system serving the Newington area, the stormwater drainage system is relatively new, having been completed during the late 1990s.

The equipment

ITS Trenchless (formerly CLM Trenchless) operates a fleet of hydraulic pipeline robotic units, for the internal repair and sealing of defective pipelines. The units are fully self contained and can operate in diameters of 135 – 800 mm. The robotic services available include:

  • Cutting of intruding laterals
  • Removing encrustation
  • Preparation for lining
  • Re-opening laterals, and
  • Epoxy sealing of junctions and pipe defects.

ITS Trenchless’ Point-Liningå¨ System works hand-in-hand with its PMO robotic equipment. There is typically a considerable degree of repair work required that this equipment would need to undertake prior to any product being installed. The robotic equipment has the ability to recut junctions, remove tree roots and prepare the pipe to accept the Point-Liner.

Project scope

This project emerged after investigation by the Sydney Olympic Park Authority (SOPA) found that the network had suffered significant damage during construction of the park site, and a number of other defects were detected that had not been identified prior to handover. ITS was awarded the project, which is based on key assessment criteria of experience, technical expertise, methodology and price.

This project involves the remediation of the stormwater system, constructed from concrete pipe ranging from 300 mm to 1,800 mm diameter and some large box culvert sections. The client, SOPA, was concerned that soil would infiltrate the stormwater drains through the fractures that had been detected. All of the fractures extended right through the walls of the pipe and, in some cases, exceeded 25 mm in width. Pipe lifting holes that were not plugged posed a risk of soil ingress by rodent entry, and defective cut-ins had exposed reinforcing steel that needed to be protected.

ITS Trenchless was engaged to undertake the necessary repair work to restore the structural integrity of the pipe network and to prevent further ingress of the surrounding ground into the conduit, preventing further subsidence of the surface. The scope of works included:

  • Pipe cleaning;
  • Re-survey of the storm water system, from which a condition assessment report identifying defects was prepared;
  • Submission of a repair plan to SOPA; and
  • Final repair.

Approximately 300 defects requiring repair were identified requiring repair. The pipeline robotics unit was used to prepare the pipe for a full structural repair, primarily through removal of various obstructions from pipelines. In performing the final repair work, three methodologies were used:

  • Man entry for greater than 800 mm diameter pipe using cementitious and epoxy repair material
  • Robot-applied epoxy injection for sealing junctions and pipe defects
  • Point-liningå¨ for the repair of cracks, fragmentation, leakage, broken joints, capping off disused junctions, defective liner installations and localised corrosion.

As has been done for SOPA, similar works have been performed for the RTA NSW, Abi-Leighton (M7 Motorway), Thiess-John Holland (Lane Cove Tunnel), Leighton Contractors (TWay), where defects in new sewer/stormwater pipelines are identified as part of the hand over process for repair. In addition, work has been carried out on existing infrastructure that may have been damaged through new construction or rehabilitation works.

Water Infrastructure Group – delivering a sustainable future

The company offers sole-source accountability for streamlined delivery of sustainable water infrastructure to meet community and business needs. Formed in 2008, Water Infrastructure Group combines the complementary skills of the former Earth Tech water projects group with Tyco’s Water Technology Australia and Water Services businesses.

Peter Everist, General Manager of the new group, said that Water Infrastructure Group was created to respond to the needs of customers and current developments in the water industry.

“Our business is a unique combination of design, build, operate and maintenance services for water and wastewater infrastructure. We have won Australian and international awards for our design/build projects and we are Australia’s most experienced private owner and operator of water recycling schemes that deliver over 20 GL of recycled water per year,” Mr Everist said.

“Water Infrastructure Group is an Australian leader for pipeline maintenance and renovation. We are Australia’s leading specialist for in-situ lining or replacement of existing pipelines, asset management, preventative maintenance and emergency repairs for pipeline systems. We also have specialised workshop facilities to manufacture and prefabricate components for treatment facilities and pipeline systems.”

“Our aim is to optimise buildability and operability to maximise the whole-of-life value of the infrastructure we deliver and maintain for our clients. Our real world knowledge of how to build and operate infrastructure feeds back to continually refine and improve our design, construction, manufacturing and maintenance processes,” he explained.

Water Infrastructure Group’s holistic approach to infrastructure delivery results in:

  • Award winning innovation
  • Reduced costs
  • Guaranteed performance
  • Individualised solutions
  • Comprehensive environmental compliance
  • Enhanced risk management.

Water Infrastructure Group is Australia’s largest supplier of Class A recycled water for farming and residential use. The company portfolio of water recycling projects includes:

  • Virginia Pipeline Scheme in Adelaide
  • Campaspe Water Reclamation Scheme in Echuca
  • Mangawhai EcoCare Project in New Zealand
  • Surbiton Park Recycled Water Plant in Melbourne
  • Pennant Hills Golf Course Sewer Mining Plant in Sydney.

Pipeline maintenance and renovation

As one of Australia’s leading infrastructure rehabilitation specialists, Water Infrastructure Group provides maintenance and complete renovation services such as:

  • CIPP
  • High pressure water and vacuum pipe cleaning
  • CCTV, laser and sonar pipeline inspections
  • Cement, mortar, epoxy and hybrid coatings and linings for pipes
  • Manholes and structures (new and rehabilitation) including potable water supplies
  • Water main cleaning
  • Slipline pipeline installation and hydraulic pipebursting.

Key projects include:

  • Taylors Lake Dam Outlet near Horsham, Victoria
  • Lower SWSOOS Rehabilitation in Sydney
  • Liverpool to Ashfield Pipeline Sliplining in Sydney
  • Maintenance Services Contract for Sydney Water
  • Western Branch Sewer Rehabilitation for Sydney Water.

Water Infrastructure Group owns and operates over 200 kilometres of pipelines distributing recycled water to over 350 customers. Specialised operations services include:

  • Treatment plant operations
  • Accredited systems for Class A water recycling plants
  • Pipeline system operations
  • Performance optimisation
  • Geographical information systems
  • Metering and billing systems.

Clean and green

Companies in the ground water industry need a way to cost effectively process their mud solids, and MudPuppy International provides an all in one solution for mud cleaning, separation and recycling, bundled in an environmentally friendly package.

Since 1990 the Californian based company has been building Solids Control systems for use in the trenchless drilling sector. The development of MudPuppy was initially inspired by the company founder’s experience in the oil and gas industry where large systems are used to keep mud sites clean. This, coupled with growing concern over environmentally friendly best practices, sparked the first MudPuppy mud cleaning system. The intention was to build a reliable, easy to deploy, and safe product that would use widely available consumables such as Baroid’s industry benchmark products, EZ-MUDå¨ GOLD and QUIK-TROLå¨ GOLD. The company now offers an extensive range of MudPuppy units for every type and size of job.

MudPuppy offers many advantages for the trenchless drilling business. All units yield high rates of recovery that will reclaim extremely clean mud and water, making the machine one of the most efficient and environmentally friendly products in its class. The smallest MudPuppy unit has a minimal footprint of 1.2 metres X 2.4 metres and comes with a 1,700 litre mud reservoir, a 60 cm X 90 cm double screen, a bottom 10 mesh shaker, a jet ventry mix hopper, a 2 inch x 3 inch x 8 å_ inch centrifugal mud pump in its desander system, and a 10 inch centrifugal mud pump in its Sand Guzzler.

MudPuppies are user friendly and highly configurable for a variety of situations and equipment set-ups. With speedy installation and minimal calibration, MudPuppies also offer faster set-up than other mud pump systems. The MudPuppy units are designed as all hydraulic systems, making the product line one of the safest available.

With MudPuppy, drilling contractors save money as clean mud reduces wear and tear on the pump, drill strings and swivels. The lower volumes of mud used also minimise impact on the site’s ground and in the water, while the rate of penetration increases with stable clean mud.

DTH Products is the Australian distributor for MudPuppy. The company services the mineral exploration, water well, geotechnical and trenchless drilling sectors of the drilling, mining and construction industries throughout Australia, New Zealand and Southeast Asia.

Operational for eleven years, the company is regarded as a leading national “÷non-manufacturing’ firm. With over 225 years of combined staff knowledge and experience, DTH Products has the experience and know-how to source the products you need. DTH Products is committed to sustaining its position as one of Australia’s best suppliers, and hence maintains close partnerships with some of the world’s leading suppliers of drilling equipment.

The big dry in Melbourne

Victorian Water Minister Tim Holding said that the low levels highlight the need for major water projects. Mr Holding said water quality in homes and businesses remains unaffected from bushfires in the water catchments.

“The two biggest supply sources of Melbourne’s catchments have had some degree of bushfire damage and [following the bushfires] Melbourne Water has assisted fire authorities to establish more fire breaks around catchments to minimise further risk,” he said.

“More than 25 billion litres of water have been transferred away from fire affected areas as part of moves to safeguard the city supplies.”

Spending big on infrastructure

The funding is for local governments to stimulate growth and economic activity across Australia and support national productivity and community wellbeing.

The $A800 million component of the Nation Building package has allocated $A550 million for strategic projects and $A250 million directly to councils and shires. The program has been extremely popular, with 344 submissions totalling $A1.2 billion already received as local governments look to build infrastructure and boost local economies.

In addition, guidelines for the Australian Federal Government’s National Urban Water and Desalination Plan have been announced. Under the Plan, the Government will provide $A1 billion over the next six years to help secure water supplies. The plan targets cities and towns of 50,000 people or more and will support projects that use desalination, recycling and stormwater harvesting to improve supply security.

Funding already committed under the Plan includes $A20 million over five years to support a centre of excellence in desalination to be established in Perth, Western Australia. A minimum of $A200 million for stormwater projects and $A30.2 million for the Glenelg to Adelaide Parklands water recycling project in South Australia – see page 62 for more details on the trenchless aspect of this project.

The remaining funds will be allocated through a competitive process. Funding assistance of up to 10 per cent of the eligible capital costs capped at $A100 million per project will be available to the successful proponents. The guidelines are available here.

Western Australian Water

Works planned over the next five to eight years involve a major upgrade of the Margaret River Regional Water Supply Scheme, including a new water source and water treatment plant; doubling the capacity of the town’s wastewater treatment system; upgrades to the wastewater storage dam; and new infrastructure to facilitate reuse opportunities.

The Minister said that the Water Corporations preferred future water source was a bore into the South West Yarragadee groundwater aquifer east of Margaret River. The Water Corporation will progress the bore in consultation with regulators, stakeholders and the community in the coming months.

In addition, the Water Corporation has begun the first of a series of upgrades to the Esperance wastewater system: the initial project included the building of a new pump station and almost four kilometres of new pipeline.

The wastewater upgrade will take approximately nine months to complete and will be fully operational by the end of 2009.

SA councils are water wise

Local Government Association President Mayor Joy Baluch said financing of the schemes was aided by a $A20 million injection from the Commonwealth Government.

“The 29 participating councils should be congratulated for their contributions to the upgrade of existing, outdated schemes which will address a number of social and environmental issues. Particularly, these schemes will reduce community reliance on the dreadfully ill Murray River system,” Ms Baluch said.

At present, seven of the 56 upgraded schemes have reached practical completion, seven more are 50 per cent completed and the others are at various stages of development.

Adelaide desalination

Minister for Urban Development and Planning Paul Holloway said “The major development assessment concludes that appropriate environmental objectives and performance criteria can be imposed on the plant to protect the marine environment and water quality in the Gulf St Vincent.”

SA Water’s development approval addresses the more than 100 separate environmental, social and economic issues identified by the independent.