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We are pleased to welcome two new members to the DM Civil management team: Jae Teakle and Scott Burnett.


Jae joins us as HSEQ Manager, bringing extensive experience from Tier 1 multinational organisations, where she led safety teams and championed risk management initiatives. As a lead investigator and published author in the Society of Petroleum Engineers, Jae has contributed to industry advancements in fatality prevention and pragmatic risk assessment tools. Her early career in exploration geology, combined with over 20 years in safety, gives her a well-rounded perspective on field conditions and workplace risk.


Scott steps into the role of Human Resources Manager, bringing 30 years of leadership experience in HR across Tier 1 national mining and contracting firms. He has successfully led teams across payroll, recruitment, training, and broader HR functions. Since joining DM Civil, Scott has already demonstrated strong leadership and mentoring skills, playing a key role in developing and implementing new policies and processes to support the company’s growth in an evolving corporate environment.


With their wealth of knowledge and experience, Jae and Scott are valuable additions to our team, and we look forward to their contributions in shaping DM Civil’s future.

DM Civil is excited to introduce our new cohort of apprentices and trainees for 2025, reinforcing our commitment to nurturing the next generation of skilled tradespeople. This year’s intake features four promising individuals who are eager to kickstart their careers in civil construction and machinery maintenance.

Asten and Blaise: Aspiring Machine Operators

Todd and Blaise, both spotted at the 2024 Motivation Foundation Open Day, bring with them a passion for machine operation, particularly excavators. Their training at the Motivation Foundation has prepared them well for integration into DM Civil’s field operations.

Under the guidance of our seasoned operators and crew supervisors, Todd and Blaise will gain invaluable hands-on experience while being introduced to DM Civil’s core principles, including our strong focus on safe work practices. Alongside this practical training, both will pursue Certificate III civil qualifications, which will open doors to advanced career opportunities as they grow into their roles.

Todd and Clayton: Workshop Enthusiasts

Todd, our 16 year old Mazenod College graduate, and Clayton, a recent student from Muresk Agricultural College, are enthusiastic about machine mechanical maintenance and have joined our workshop team. They will work on DM Civil’s modern fleet of trucks, construction machinery, and equipment, assisting with scheduled maintenance and repairs.

Their journey will include theoretical trade training through TAFE, complemented by in-house learning under the mentorship of our experienced fitters and technicians. This combination of practical and academic training will equip them with the skills needed to excel in the demanding field of machinery maintenance.

Building a Skilled Workforce

At DM Civil, we are proud to support young individuals with a passion for hands-on trades that are vital to our operations. By sourcing, training, and retaining dedicated talent, we ensure our team’s continued success and growth.

We look forward to watching Todd, Blaise, Asten, and Clayton thrive as they embark on their respective career paths. Their enthusiasm and dedication are a testament to the bright future of the civil construction and maintenance industry.

Recognition of a legacy

 

Following our Civil Contractors Federation WA State Earth Award success with the East Perth Power Station HP Gas Pipeline project, we recently attended the CCF National Awards night in Canberra on Friday, 22 November. While we were unsuccessful in our national bid, we are immensely proud to have been contenders at such a prestigious level.

A highlight of the evening was the recognition of one of DM Civil’s founders, Reg Toohey, for his exceptional contributions and leadership within the Civil Contractors Federation (CCF).

The CCF, the peak national body representing our civil construction industry, has a rich history. It began as the Land Development Contractors Association (LDCA) before merging with the Australian Earthmovers and Road Contractors Federation (AERCF) in the late 1980s, evolving into the Civil Contractors Federation in 1995. The CCF has been a steadfast advocate for fair industrial conditions and equitable opportunities within the industry.

Reg Toohey’s leadership journey with the CCF is remarkable. Elected state president of CCFWA from 1994 to 1997, Reg went on to serve as national president from 1998 to 2000. During this time, he played a pivotal role in driving positive changes across the industry, championing training as a cornerstone for sustainability and growth. Remarkably, Reg balanced these responsibilities while serving as managing director at DM Civil, overseeing estimating and operational duties—a testament to his dedication and work ethic.

On the awards night, Reg was honoured with an Honorary Life Membership of the CCF, recognising his significant contributions and enduring legacy in shaping our industry.

We congratulate Reg on this well-deserved recognition and remain inspired by his example as we continue to build on the foundations he helped establish.

 

DM Civil proudly claimed the 2024 WA Earth Awards for Excellence in Civil Construction for the $10-30 million project value category for its work on the East Perth Power Station (EPPS) Pipeline project. This award marks not only a significant achievement for the company, but is also a testament to the innovation, quality, and meticulous project management that define DM Civil’s operations.

Project Overview

The East Perth Power Station Pipeline project, commissioned by ATCO Gas Australia, involved constructing a 7.5 km high-pressure steel gas pipeline. The project was split into two major packages:

• Package A: Construction of a new 7.4 km DN250 steel high-pressure gas pipeline from the Bayswater Pressure Reduction Station (PRS) to Alexander Drive in Dianella, ensuring continuous gas supply to the Perth CBD.
• Package B: Installation of a 200m DN250 steel high-pressure gas pipeline in East Perth, bypassing the existing PRS and connecting the newly derated HP152 pipeline to the existing HP059 pipeline.

This project represents ATCO’s largest pipeline construction effort in Australia to date and DM Civil’s first significant foray into natural gas pipeline construction, with a project value of over $18 million. The scale, complexity, and timeline showcased the capacity of DM Civil’s project management, innovation, and technical capabilities.

Construction Challenges and Complexities

The East Perth Power Station Pipeline project presented a unique set of challenges. DM Civil’s team successfully navigated simultaneous operations (SIMOPS) with other third-party contractors, intricate stakeholder management, and complex environmental factors. Key challenges included:

• Simultaneous Projects in Bayswater Light Industrial Area: The team worked alongside several major infrastructure projects, including the Tonkin Gap project, Bayswater Evolve project, and another ATCO gas pipeline project, all within a 1km radius. Daily meetings with affected parties ensured no delays or conflicts.
• Built-Up Residential and Industrial Areas: The pipeline installation traversed heavily populated areas, including narrow suburban streets, major roads like Alexander Drive and Grand Promenade, and industrial zones in Bayswater. Stringent traffic management plans, coordination with local authorities, and innovative construction methodologies were vital to minimising disruptions to businesses and residents.
• Groundwater and Contamination Issues: A significant challenge arose from encountering contaminated groundwater (PFAS) in the Bayswater Light Industrial Area. DM Civil executed major dewatering operations, including 24/7 tankering, to ensure safe disposal of the effluent while keeping the site dry and safe for pipeline construction.

Innovative Solutions and Construction Techniques

DM Civil employed various innovative construction techniques throughout the project, setting a new standard for ATCO and future projects. Some notable innovations include:

• Horizontal Directional Drilling (HDD): A substantial portion of the pipeline was installed using HDD, particularly through busy intersections like Beaufort Street and Grand Promenade, without disrupting traffic. The use of HDD in built-up suburban areas significantly reduced the impact on residents and businesses compared to traditional open excavation methods.
• Pilot Boring: Pilot boring was utilized to install sections of the pipeline where HDD or open excavation was not feasible. This method allowed for accurate, trenchless installation of pipes beneath existing water mains and roads.
• Pipe Welding Mid-Pullback: To avoid disturbing well-established trees and verges in suburban areas, DM Civil implemented a novel solution of welding pipe sections mid-pullback during HDD, reducing the size of excavations and protecting the community’s landscape.
• Coating Material Trials: DM Civil introduced a new heat shrink sleeve coating system to expedite installation, which, if adopted, could improve productivity on future pipeline projects.

These innovative approaches not only mitigated project risks but also saved time and reduced costs, showcasing DM Civil’s commitment to delivering high-quality cost effective solutions for its clients.

Leadership and People Development

The success of the East Perth Power Station Pipeline project can be attributed to the strong leadership and teamwork demonstrated by DM Civil’s project management team. A notable aspect of this project was the “lead from the front” approach, where the Project Manager was on-site for the majority of the project, ensuring seamless communication and problem-solving in real time. This hands-on leadership style created a motivated and engaged workforce, which proved crucial in overcoming the project’s complexities.

The project also provided opportunities for people development and training, with multiple leading hands promoted to supervisory roles and gaining valuable experience in gas pipeline construction. The project engineer for this contract, deeply involved in all aspects of the project, was later promoted to Project Manager for subsequent gas pipeline projects, highlighting the developmental impact of the project on DM Civil’s workforce.

Safety and Environmental Management

DM Civil’s unwavering commitment to safety and environmental stewardship was evident throughout the project. The company’s safety management plan, accredited to ISO 45001:2018, included a thorough hazard identification workshop (HAZID) and regular safety discussions with ATCO. The successful use of a specialised “cold-cutter” for cutting existing gas pipelines without producing heat exemplifies the innovative safety measures implemented on-site.

Environmental management, accredited to ISO 14001:2015, was equally robust. DM Civil engaged arborists to protect significant street trees during excavation and developed a noise management plan that received praise from local authorities for its effectiveness during nightworks. Additionally, DM Civil’s handling of contaminated groundwater through dewatering and effluent disposal ensured no adverse environmental impact, setting a precedent for future projects in the area.

Stakeholder Management

Effective stakeholder management was critical to the success of the East Perth Power Station Pipeline project. DM Civil worked closely with local residents, businesses, and government authorities to minimize disruptions and maintain positive relationships. The team carried out extensive community engagement, including door-knocking and letter drops, to keep stakeholders informed and address their concerns. The proactive approach to managing community relations resulted in minimal complaints and strong positive feedback from local councils and businesses.

Legacy and Future Impact

The East Perth Power Station Pipeline project leaves behind a legacy of innovation, efficiency, and excellence in civil construction. DM Civil’s success in managing this complex project has established the company as a major contender in the gas pipeline construction industry. The innovative methodologies developed during this project, such as the use of HDD in difficult areas and the pilot boring technique, have since been adopted by ATCO for future pipeline projects, further cementing DM Civil’s reputation for delivering high-quality solutions.

Additionally, the strong working relationship forged with ATCO during this project has led to DM Civil securing multiple pipeline contracts with the company, showcasing the long-term value created through successful project delivery.

The East Perth Power Station Pipeline project is a highlight example of DM Civil’s commitment to excellence in civil construction. The team’s ability to overcome significant challenges, implement innovative solutions, and deliver a high-quality project on time and within budget has been rightfully recognised with the 2024 WA Earth Award for Excellence in Civil Construction.

The successful completion of the East Perth Power Station Pipeline project showcases the company’s capacity to meet complex challenges head-on with innovative and efficient solutions. As DM Civil continues to build on this foundation, the lessons learned and breakthroughs achieved on this project will inspire future advancements, positioning the company as a leader in civil construction and setting new standards for the industry.

We have shared 7 chapters dedicated to our large bore steel (MSCL) water mains, we have discussed DM Civil’s company history of laying DN1400 Sintakote bulk water mains.

Since 2000, DM Civil has laid over 110 kilometres of DN1400 steel water mains with a further 50 kilometres of other sizes from DN600 and up to DN1200, also in steel. We have also laid over 157 kilometres of ductile iron (DICL) raw water supply mains for mining water supplies.

Almost all of this pipework has been laid below ground in various conditions including sand, clay, rock and in water-charged ground. Occasionally, we have laid pipework above ground, generally where the main that we are replacing must remain operational and is in poor condition. This was the case for the main conduit (Goldfields and Agricultural Water Supply Scheme) replacement at Boondi where rock would have needed to be blasted to lay the pipe below ground.

Over three-quarters of these projects featured several sections to be installed by trenchless techniques utilising the technology and equipment of the DM Civil trenchless division. Our fleet of auger boring and microtunnelling equipment has been proven to give our pipeline crews a distinct advantage over others, with our in-house expertise and project control.

Over the years, the MSCL (Steel Mains Sintakote) jointing systems have progressed from rubber ring joint and expanded and collapsed welded joint, to Sintajoint, spherical slip-in joint, ball and socket joint (welded inside and out), Sintalock rubber ring Type 1 and Type 2 (both externally welded), butt joint (plain and collared), and flanged joints.

DM Civil is proud to have been associated with these projects and we are extremely proud of our construction crews and engineering teams who have worked through tough conditions in heat, cold and rain for long shifts. These people have forged the reputation that DM Civil enjoys today as a leading pipeline contractor for our state water supply, providing expertise to the industry.

 

DM Civil Pipeline Company History

CHAPTER 1

Some DM Civil history… Southern Fortescue Borefield Transfer Pipeline

DM Civil was established in 1976 as a drainage and construction contractor, working in the metropolitan area and across regional Western Australia from Esperance to Wyndham and into the Tanami Desert of the Northern Territory.

In the late 1980’s, the DM Civil company founders were our on-site operators and pipe installers.

With a recommendation and an invitation from Hamersley Iron to construct a borefield collector network and then 21km of DN375 ductile iron pipework, these men worked long days and long shifts to construct the buried pipeline through the hard banded iron formation and dolerite dykes. This was carried out only 4 metres from the existing above-ground pipeline which was still in operation.

Quoting the mining magazine publication of the day ‘The Dedication and professionalism shown under challenging conditions in the Pilbara are hallmarks of DM’s work around the state.’

It was from these humble beginnings and hard work, that DM Civil has developed into a water supply pipeline installer with experience gained and retained in the fabric of our firm and valued by our clients and peers alike.

 

Chapter 2 – Stirling Alliance Trunk Main

Stirling DN1400 Trunk Main Stage 1 – Stirling Dam to Peterson Road Harvey

Leading up to 2000, Perth was approaching severe water supply shortages. Climate change had been recognised by Water Corporation and they committed to an Integrated Water Supply System (IWSS), including linking all of the dams north of Wellington Dam in Collie to feed into Perth’s water supply system.

The DM Civil and Brierty Contractors joint venture was selected from a field of 22 contractors across Australia to form the first alliance by the Water Corporation to complete Stage 1 of the proposed work including 10km of road and 19.3km of DN1400 Sintakote MSCL pipeline in extremely steep rocky terrain, as narrow as 9m total construction corridor.

With the aim of ‘best for the project’, the alliance team was able to deliver innovations that provided significant savings. The project was delivered ahead of schedule and 10% under the original budget. 95% of all cleared vegetation was recycled for fauna habitat, soil stabilisation and erosion control. Millable timber from clearing was donated to the local Gnaala Carla Boodja community to train young Aboriginals in timber milling and furniture making.

The project and the management structure received significant recognition for exceptional performance. The Alliance was the winner of the West Australian “Engineering Excellence Awards 2000” for Management of Engineering and Environmental Categories. The project was also awarded the West Australian and the much coveted Australian National Overall, “2000 CASE Earth Awards” for outstanding Environmental Project of the year.

Just like the late 1980’s at Southern Fortescue, the DM Civil company owners still led our staff. And many of those same staff are with our company 25 years on.

 

Chapter 3 – Stirling Trunk Main Valve K to Valve P

Stirling DN1400 Trunk Main – Shire of Murray

Following on from our alliance contract experience on the first leg of the Stirling Trunk Main, Water Corporation chose to release the remaining legs of the pipeline up to Tamworth Hill Reservoir as hard dollar contracts.

In 2001, DM Civil was awarded the AS4000 contract to construct the second leg of the remaining pipework. This 27 kilometre section of DN1400 pipework was a mixture of rubber ring and welded joints at the bends and section valves. The contract commenced from the last pipe laid, south of the Pinjarra light industrial area and extended north across the farm areas to a point short of Karnup Road in Serpentine Jarrahdale Shire. The work included a major pipe bridge, approximately 50 metres in length over the Murray River.

After an above average winter rainfall, a large portion of the route was inundated, which required resequencing of the works programme and preparation to construct in heavy conditions, even in the higher ground of the coastal plain.

Our experience on the first leg of the pipeline in the Harvey Valley for the Stirling Alliance contract, set DM Civil up for many of the challenges ahead in terms of environmental and stakeholder management. This experience was particularly relevant in terms of plant and machinery chosen to handle this length and mass of pipe with safety and manoeuvrability in mind.

Environmental management, particularly around waterways and remnant woodlands was still a high priority for the project. Fauna mapping and management plan approvals were a time consuming but eventually rewarding process prior to mobilisation. DM Civil prioritised this task and worked alongside Water Corporation environmental scientists to ensure protection and correct handling of fauna, particularly Southern Brown Bandicoots and Black Cockatoos. Dieback management was also a consideration in native forest areas.

A further legacy of our time on the first alliance contract in the Harvey Valley, was the ability to formally liaise with stakeholders along the route including local government authorities and the numerous farmland owners. In conjunction with Water Corporation, dilapidation reporting procedures for local roads as well as farmland pastures were formulated to ensure protection for all stakeholders.

With the second section of the Stirling Trunk Main successfully and safely installed, a total of 46 kilometres, DM Civil had been a contributor to the IWSS.

 

Chapter 4 – Serpentine-Canning Link Main

Serpentine-Canning DN1400 Trunk Link Main – Shire of Armadale

In 2005, following on from our second leg of the Stirling Trunk Main, Valve K to P, DM Civil constructed another section of the Perth integrated water scheme (IWSS).

The 13.7 km DN1400 Sintakote pipeline linked the Serpentine Dam trunk main at Nicholson Road pumping station and the Canning trunk main at the Connell-Manning valve complex.

The design of the pipeline was substantially altered after contract award due to criteria set by the local government authority. With DM Civil’s experience in pipeline construction, we were able to adapt to Water Corporation’s changing requirements and still complete the works within the contract programme. This included an above ground crossing of the Canning River to fulfil the Aboriginal heritage protection requirements of the bed and banks.

Another key component of the works was to complete pipe installation under the Corfield Street interchange with Tonkin Highway. This section of the main was completed over Easter to minimise traffic disruption and to ensure that Tonkin Highway construction programme was maintained. Work continued for 24 hours a day over the 4 day holiday period with the roads fully reinstated and open to traffic by the following Tuesday morning.

The project delivered another key piece of the IWSS.

 

Chapter 5 – Serpentine-Canning Link Main

Stirling Dandalup DN1400 Link Main Ravenswood to North Dandalup – Shire of Murray

Following on from our DN1400 pipeline from Nicholson Road pumping station to Connell-Manning valve complex in 2005, DM Civil was contracted by Water Corporation to construct another section of DN1400 pipework for the Perth integrated water supply (IWSS).

The Stirling Dandalup link was constructed in 2009-2010, with the contract comprising two separable portions to be constructed concurrently.

The first 14.2 kilometre long class 35 DN1400 pipeline was to commence at the location of the proposed Ravenswood pumping station on Old Mandurah Road to the west of Paterson Road, and traverse farmlands and rural roads to Atkins Road in North Dandalup townsite, adjacent to the railway. This end of the main was connected into the existing Stirling Dandalup Main.

Two above ground crossings were constructed, the first over the Dandalup River and the other over Goomaljerup Creek, beyond Atkins Road in North Dandalup. Live service crossings of the Pamelia Gas Pipeline and twin Dampier to Bunbury Natural Gas Pipelines were carried out by the DM Civil trenchless division.

The post award discovery of an unmapped, direct buried major fibre optic cable that meandered through the pipeline route proved to be a challenge. Locating the cable as construction progressed was a time consuming process, as was the protection measure of procuring and placing steel plates at all crossing points for the duration of the contract.

The second separable portion of the works was to construct a 2.2km long class 21 DN1400 pipeline duplication of the existing Stirling Trunk Main downstream of the proposed Ravenswood pumping station, running from the Murray River to the station location. This included a DN1200 section valve complex installed to isolate the bifurcation of the trunk main near the river.

As with our other trunk main projects before, this project delivered the Water Corporation another link for IWSS.

 

Chapter 6 – Wungong Transfer Main Stage 2

Wungong DN1400 Trunk Main – City of Armadale

At the same time as DM Civil was constructing the Stirling Dandalup link main in 2009-2010 (Chapter 5), we were also awarded the contract for stage 2 of the Wungong transfer main. This was a 10.8km DN1400 MSCL Sintakote pipeline between the Nicholson Road pumping station in Forrestdale and the Mitchell Street valve complex in Wungong.

The contract scope was to install the DN1400 MSCL pipe including testing and treatment of acid sulphate soils, connection to the existing pipework at Nicholson Road pumping station with the installation of a DN1200 pressure reducing valve, and valve work at the Wungong Dam pipe connection.

At the Wungong Dam offtake, provision was also made for a local reticulation connection. A booster pumping station was constructed, that directly fed off the new pipeline. This included a five story high surge vessel to manage any peak in hammer pressure during the operation of the booster pumping station. These works were completed concurrently with the pipeline, providing the local community with a new reliable water source for domestic use.

The pipeline allows Water Corporation to feed water from the Kwinana Desalination Plant back into Wungong Dam, further diversifying storage options. Conversely, the pipeline can be used to feed water from Wungong Dam to Nicholson Road pumping station where it can be pumped to other storage facilities in the event that Perth encounters a higher than average rainfall.

As with our trunk main projects before, this project delivered the Water Corporation more flexible storage for the IWSS.

 

Chapter 7 – Stirling Trunk Main Duplication

Wungong DN1400 Trunk Main – City of Armadale

At the same time as DM Civil was constructing the Stirling Dandalup link main in 2009-2010 (Chapter 5), we were also awarded the contract for stage 2 of the Wungong transfer main. This was a 10.8km DN1400 MSCL Sintakote pipeline between the Nicholson Road pumping station in Forrestdale and the Mitchell Street valve complex in Wungong.

The contract scope was to install the DN1400 MSCL pipe including testing and treatment of acid sulphate soils, connection to the existing pipework at Nicholson Road pumping station with the installation of a DN1200 pressure reducing valve, and valve work at the Wungong Dam pipe connection.

At the Wungong Dam offtake, provision was also made for a local reticulation connection. A booster pumping station was constructed, that directly fed off the new pipeline. This included a five story high surge vessel to manage any peak in hammer pressure during the operation of the booster pumping station. These works were completed concurrently with the pipeline, providing the local community with a new reliable water source for domestic use.

The pipeline allows Water Corporation to feed water from the Kwinana Desalination Plant back into Wungong Dam, further diversifying storage options. Conversely, the pipeline can be used to feed water from Wungong Dam to Nicholson Road pumping station where it can be pumped to other storage facilities in the event that Perth encounters a higher than average rainfall.

As with our trunk main projects before, this project delivered the Water Corporation more flexible storage for the IWSS.

DM Civil were contracted to provide complex construction services to re-locate existing major water systems, with new replacement water mains, as well as removal, or grout fill abandoned water pipes, under Armadale Road near the intersection of Armadale and Nicholson Roads. These projects were critical stages to the delivery of a main roundabout and fly-over bridge development.

As these pipeline works incorporated some of Perth’s main water supplies, Serpentine & Armadale Trunk Water Mains, it was crucial to have early contractor involvement. DM Civil, collaborated closely with key stakeholders to develop extensive constructibility methodologies and establish clear planning, staging, sequencing and co-ordination for the roll-out of all services, including:

• Comprehensive stakeholder management – a staged process to minimise disruption to local businesses, scheduling of works during peak water demand times, hazard prevention with high voltage power lines, high pressure gas mains and water reticulation mains to maintain the integrity of the water supply during construction.
• Pipeline design, replacement and construction logistics – a re-iterative process to establish the best suited alignment, pipe materials for the location, environmental sustainability and to minimise the disruption of existing infrastructure.

Our scope of works expanded as the project evolved and DM Civil were awarded:

• The replacement of 90m of the DN1220 & DN1370 Serpentine trunk mains, replaced with DMN 1400 Sintakote® MSCL, under Armadale Road. This involved the removal of each main, then installing new pipeline. Weekend shut downs and traffic diversions were required of Armadale Road for each main.
• The installation of 2 x DN900 section butterfly valves on the existing Serpentine Trunk Mains;
• Installation and removal of temporary DN600 MS PRV pipeline with 2 x DN600 butterfly isolating valves, off the existing Serpentine mains, into the existing PRV (Pressure regulating Valve) station;
• The installation of 125m of DN315 PE and 230m of DN250 PVC, to replace existing Cast iron water reticulation mains.  This included HDD (Horizontal Directional Drilling) under Nicholson road for the DN315 PE.
• The laying of 1,050m of DN800 MSCL pipe. This included:
  • 4 Air & scour valves
  • 21m of DN1500 MS casing pilot auger bored under Nicholson Road with DN1200 MSCL pipe sleeved and grouted inside, in ground water at 4m depth, with 12 metres of the bore requiring use of manual pipe jacking techniques through hard rock;
  • 24m of DN1000 MS casing pilot auger bored under twin live DN1400 Serpentine Trunk Water Mains, with the DN800 MSCL Armadale Main sleeved and grouted inside, in groundwater at 4.8m depth.
  • 18m of DN1000 MS casing pilot auger bored under high pressure gas main.
  • DM Civil’s Trenchless Technology Division provided the pilot auger boring, sleeving & grouting for the DN1500 & DN1000 MS bores to achieve the relocation, disinfection, hydrostatic testing, connection and replacement of this DN800 Armadale Trunk Water Main pipeline section.  By using our trenchless techniques, this mitigated safety issues with working in groundwater, at depth with large diameter mains and it also provided added protection to existing live services, whilst maintaining traffic flow.
  • 556m³ Aerated Foam Grout to abandoned remaining sections of DN1370mm & DN800 water pipe;
  • Removal and disposal of redundant existing DN1370, DN1200 and DN800 coal tar epoxy enamel coated MSCL trunk water main pipes, which had ACM (Asbestos Containing Material) in the wrapping.
  • Demolition, removal and disposal of existing redundant steel reinforced concrete valve pits, valves and interconnecting pipework.

DM Civil ensured the successful delivery of these projects through meticulous engineering, project and operational management. There were no service strikes, or safety incidents, even when unknown services were encountered. It is a testament of our multi-disciplinary experience and capabilities that prove DM Civil can build a pipeline, anywhere and guarantee our performance.

Since DM Civil was founded in 1976, concrete work has often featured as a component in any contract, if not the key scope of works. Our company has built concrete elements and structures including:

• Pre-cast and insitu-cast vehicle and pedestrian underpasses
• Pre-cast and insitu-cast boat ramps
• Insitu-cast storage dam spillways
• Insitu-cast trunk watermain valve pits
• Insitu-cast industrial and municipal use building structures
• Insitu-cast main sewer access chambers
• Precast stormwater main drain bridges
• Precast road bridges
• Insitu-cast ground tanks

Potable water retaining ground tanks have been build by DM Civil since the 1990’s when the Araluen Golf Course Estate storage tanks were constructed in Roleystone. Since then, we have constructed the base ring beam and associated works for the Carabooda 60 megalitre main water supply, the Coral Bay 800 kilolitre water supply main tank and the Dalwallinu town supply ground tank.

The Dalwallinu 2 megalitre ground tank and associated works was constructed for Water Corporation in 2018. The 20m diameter tank was cast insitu with 6m high walls, cast in 3 lifts and covered with a concrete roof. The roof was constructed using precast beams and panels, supported by precast columns, which were topped with an insitu-cast sloping cap. The construction was subject to strict quality assurance measures to ensure longevity of the asset and to comply with drinking water standards.

The Dalwallinu ground tank construction comprised the following steps:

• Bulk earthworks for the tank foundation by removal of unsuitable material and replacement with clean sand fill to subgrade level;
• Installation of MSCL outlet pipework below the tank base;
• Forming and pouring a concrete block trial mix for testing prior to tank construction;
• Placement of a mass concrete blinding layer as a firm and level access to the tank area and for installation of the tank base steel reinforcement and wall starter bars;
• Forming and pouring the tank base with 40MPA special mix concrete;
• Placement and propping of wall formwork first lift including injection tubes for hydrophilic seal material;
• Fixing of first lift reinforcing steel including incorporation of a stainless steel manway code welded to the reinforcement;
• Forming and pouring second lift of wall including surface treatment of first lift top edge to ensure a waterproof seal;
• Forming and pouring third lift of wall to 6.0m level including formed top pockets to incorporate roof beam and surface treatment of second lift top edge to ensure a waterproof seal;
• Craning into place over starter bars, RC columns that were precast on site and propping in place and injecting epoxy grout in tubes incorporated during the precasting process;
• Craning into place precast Delta Beams to bear on the third wall lift pockets and the precast RC columns;
• Craning into place precast Delta Core panels to span between beams with subsequent grout fill to perimeter units;
• Pouring a single roof slab of the Delta Beams and Panels to form a homogeneous cover over the tank;
• Fixing the ventilator units and access hatched into the concrete roof;
• Fixing of the tank external stainless steel tank filling pipework and the internal fibre reinforced plastic (FRP) pipework and supports;
• Construction of the FRP internal and external access ladders and security screens;
• Filling and leak testing of the tank for commissioning.

DM Civil has now commenced construction of a similar design of ground tank located at Lakelands on the northern side of central Mandurah. The 850 kilolitre tank is being built to Water Corporation standards to the same design as the Dalwallinu tank, but with a reduced capacity. Our experience on the Dalwallinu project will be used to ensure that the same high standards are maintained for this project and that our workforce continues to gain and retain the skills and expertise for this scope of works.

As part of the EPPS Precinct redevelopment by DevelopmentWA, ATCO’s current assets must be relocated in order to continue supply of natural gas to the Perth CBD.

The Pressure Reduction Station located on the East Perth site needed to be relocated to Bayswater. To accomplish this, DM Civil was contracted to build a 7.4km section of DN250 high pressure steel gas pipeline from Bayswater to Dianella, as well as a short realignment in East Perth itself.

The works were carried out by DM Civil and their subcontractors, and involved a mixture of horizontal directional drilling, pilot boring and open excavation to install the pipeline. Much of the installation occurred along Grand Promenade including under the Beaufort Street and Walter Road intersections, with HDD carried out while traffic remained operational. The remainder was installed in the narrow residential streets of Bayswater/Dianella and the Bayswater Light Industrial Area, with no disruptions to businesses or to multiple other civil projects operating in the same area.

The construction of the EPPS Pipeline represented a synthesis of DM Civil’s capabilities. Namely, a diverse mixture of well-planned construction methodologies combined in order to carry out a complex project in a built up and difficult location.

The bulk of the works constituted HDD installation of the DN250 steel line pipe. This involved strategic positioning of HDD entry/exit pits for fabrication of the HDD pipe strings and in-house drafting of the HDD profiles to account for ground conditions, pipe bending and the constrained working areas. Despite drill shots up to 330m long, and in varying ground conditions, each shot was ultimately successful and high rates of productivity were achieved despite encountering groundwater, coffee rock and working amongst many live congested streets.

The open excavated portion of the works constituted an approximately 1km work front through the narrow suburban streets of Bayswater. Dealing with very sandy ground conditions, tight working spaces, well established trees and verges, re-designs and re-alignments, the construction team completed this portion of the works with minimal issues.

Pilot boring to install line pipe for high pressure gas applications is not a typical method utilised by our client ATCO Gas. However, pilot boring was successfully carried out across this project with 13 bores completed. This method proved most useful in areas too tight for HDD strings to be fabricated, but where trenchless installation was still necessary due to the presence of high-profile existing services and roads.

Richard H. was introduced to DM Civil by his brother Michael in early 2011 and commenced work in his first role as a stormwater manhole patcher at Lake Coogee Stage 2, a residential land development project. This was under the tutelage of the legendary Joe Santoro who has since retired at the age of 76!

Richard’s first supervisors were Ben and Simon S. on the various stages of Lake Coogee, Wundowie land subdivision and then Mundaring Water Treatment Plant. His first experience included mortar patching in the confines of concrete chambers (he is 6’4”), excavating rock and fighting groundwater and then driving jackhammers at Wundowie.

After a few short years, Richard began to take on leading hand and supervisory roles on larger subdivisional projects including Carine Rise and Trinity Stages 30 and 31. His positive attitude and attention to detail were key to his success on more varied works at Stirling and Fremantle cast iron renewal schemes, Cardup Bridge box culverts and Abernethy Road water main.

A standout project for Richard was his role in 2019 as supervisor for the Kambalda West DN375 pressure main renewal. The scope of work was complicated due to the condition of the essential existing main and the fragmented timing of each section of the works. Without being prompted, Richard took on the liaison and organising role with the local operator to ensure smooth shutdowns and cut-ins for the new works, while motivating his crew to complete the job which was extended well beyond the original programme.

In late 2019, Richard was transferred to our Alcoa work sites at Wagerup, Pinjarra, Kwinana and the mine sites at Willowdale, Huntley, Arundel, Myara, McCoy, Marshall, Roberts and more.

At this time, Richard was promoted to Construction Manager considering his experience, new responsibilities and above all, his performance. His willingness to ensure continuity of the works extended through planned company breaks including Christmas, and this loyalty was noted by the client as well as DM Civil. He now manages all work packages for Alcoa, who has become a major client since Richard’s introduction. This includes supervision of works on the ground, organising logistics, participation and review of pricing and direct interface with the client for new work. He has now delivered over 35 projects over all Alcoa refinery, residue and mine sites.

In light of Richard’s effort and performance since his commencement, we are pleased and proud to promote him to the role of Project Manager. The title is well earned, and we look forward to supporting Richard in his new role.

DM Civil is currently engaged in three regional projects in Western Australia and another in South Australia.

We are now well underway with our project at Jigalong Community, 2 hours east of Newman, with the first swing complete. The scope of works is driven by the fact that the existing wastewater treatment ponds to the west of town are failing and are no longer serviceable but cannot be taken offline for sufficient time to be refurbished. The new ponds being constructed by DM Civil are some 2km to the east of town.

The Jigalong contract is unique in its remote location in a small ‘dry’ community with none of the usual recreational facilities associated with a normal regional job site or even a water body or coastline. The DM Civil crew is restricted to a single house with shared messing and ablutions and the need to cater for their own meals. Night time security is an issue and compliance with cultural heritage protocols is always front of mind.

We express our appreciation to the crew members for their efforts to work what could be described as rather restricted conditions on long shifts and long rosters. Our project engineer, has provided excellent leadership with organising crew activities, liaison with the community CEO and being able to concentrate on the technical task at hand. His work has continued on break to ensure continuity of communication with the client.

Our initial focus has been the setup of facilities to allow the scope of works to proceed. Construction water had to be sourced from an existing bore some 20km from the site in a borefield that also supplies the community. The Little Sandy Desert is obviously a particularly dry location and controls on abstraction rate and daily quantity are closely monitored. Our remaining 50kL water tower is set up at Bore 2/85 to allow low constant flows to provide overnight filling. Water is essential for the earthworks at the wastewater ponds to provide optimum moisture content for the soil to be placed and compacted in the pond embankments.

The soil at the wastewater ponds site is extremely fine and of a high plasticity. This is unsuitable for embankment construction on its own. We have therefore mined in excess of 1,000 cubic metres of a coarser fill material from a location some 10km away adjacent to the water supply break tank, part way to the Bore 2/85 water source. The water has been transported to site and is being blended in a 1 to 3 ratio with the stockpiled insitu material, and moisture conditioned with the imported water to produce a compliant material suitable for pond wall construction. This was proven with a trial section which was tested by our geotechnical consultant and witnessed by the client.

As a part of the scope of works, the existing pumping station is to be refurbished by installing new pumpsets including electrical switchboards and controls. A new pressure main will convey the wastewater to the new ponds when completed and commissioned. This has already been partially completed. The original sequencing of pump renewal involved an iterative process of replacing and testing one pump at a time and testing before proceeding to the next. DM Civil provided a value adding solution of installing a fully automated bypass pump set to take the wet wells completely off line to allow for full mechanical and electrical refurbishment to take place in isolation and without risk of encountering a situation that delayed full operation of the community wastewater facility.

Another positive initiative introduced by DM Civil was the recognition that the road bridge on the route to the break tank borrow area had load limiting signage not previously considered by the client when allocating haul routes. Sam E. and Ben S. notified the client and provided solutions for a detour around the bridge or to reconfigure the truck combinations to keep under the load limits. The client expressed their appreciation to DM Civil as a proactive contractor offering advice on potential issues and providing solutions to ensure continued production.

A further positive initiative for the contract has been the employment of a local resident aboriginal in our crew who provides another channel of communication with the community.

At DM Civil, we pride ourselves in paying attention to the needs of our clients since our clients are the reason for our continued existence as a construction firm. Our company management continually seeks to instil the attitude of “the customer comes first” into our project management as well as our field and administrative staff.

The final product delivered for DevelopmentWA in Stages 7B and 7C at Champion Lakes close to Armadale, has proven to reflect this ethos in that during the middle of the pandemic when staff were challenged with remaining healthy and actively following best practice to remain that way, unforeseen site conditions forced our project manager to re-sequence the works, materials were critically short and subcontractors were unable to deliver their work, we “found a way”.

We “found a way” by immediately communicating the changed site conditions to our client and to the project design consultant and Superintendent. The understanding and collaboration that followed this communication proved that there is no substitute for teamwork and collaboration when challenges are presented during a project.

With the project now behind us, we are pleased to reflect back on the challenges, as trying as they were, and to observe another stage of residential building lots produced by DM Civil on the shores of the Champion Lakes international standard rowing facility. The 2,000m long buoyed regatta course is home to national competition for rowing as well as kayaking and dragon boat racing. The Champion Lakes residential estate by DevelopmentWA now has a second entrance from Lake Road via a new roundabout constructed as a part of the works. This new entry road provides greater accessibility to residents and visitors to the lakeside amenity on offer at Champion Lakes.

Lot sales are going well and we expect that the design, standard of construction, location next to the rowing facility and general access to cycle and pedestrian paths around the lake as well as proximity to the Perth CBD and the airport will generate continued interest.

Thank you DevelopmentWA and JDSi Engineers.