14 New IS Ratings

14 New IS Ratings

During the 2018 IS Awards Gala dinner, ISCA presented fourteen projects or assets with IS Rating certificates. IS Rating certificates are awarded to projects which have demonstrated a strong commitment to sustainability through their lifecycle. This is the largest amount of IS Ratings awarded at a single event and is testament to the acceleration of sustainability in the infrastructure sector. There were also two IS firsts:

  1. An Operations Rating to Metro Trains Melbourne, and
  2. A Program Rating to Sydney Metro.

ISCA evaluate projects using the Infrastructure Sustainability (IS) rating industry developed, owned and operated tool. Launched in 2012, the IS scheme rates all phases of project’s life cycle in terms of sustainability (including environmental, social, economic and governance aspects) of infrastructure and assets.

Projects can be awarded rating levels of Commended (25-49 points), Excellent (50-74 points) and Leading (75-100 points)

The IS Awards are an opportunity to celebrate our industry, the projects demonstrating leadership and most importantly, the hard work of the project teams and the impact of the IS Rating Scheme. Congratulations to our latest IS Rating certifies;

Canberra Metro Light Rail (Design, Excellent)

The first stage of a new light rail in Australia's Capital connecting Gungahlin and the City, consisting of 12km of light rail track, 13 stops, light rail vehicles, and a depot to be operated and maintained by Canberra Metro for 20 years.

This project, which registered for an IS Rating under John Holland and CPB Contractor’s leadership, achieved an ‘Excellent’ Design v1.2 IS Rating.

Transport Canberra & City Services Director General Emma Thomas says, “This is a great achievement for the Light Rail project and confirms that light rail is being developed as a sustainable infrastructure project.”

“Independent evaluation gives the project creditability.”

Ms Thomas said the process has also created a number of connections and strong relationships across the industry nationwide.

“The IS Rating process has been extremely beneficial for the Light Rail and Transport Canberra. It has provided insight into to national best practice and a benchmarking opportunity against other national infrastructure projects.

“The rigours of undertaking the rating process has highlighted the project’s alignment on a number of key aspects of the Territory’s sustainability agenda.

“It also provides validation of the project’s direction and a rationale for some modification within the project’s life cycle,” said Ms Thomas.

There were several rating highlights, including:

Innovation Reducing water usage with the application of a polymer as a soil bonding agent and dust suppression has been recognised as an Australian first.

Energy Development of an energy strategy that optimises energy efficiency in operations, solar panels were installed on the Mitchell depot roof and the operation of the light rail achieves zero net carbon emissions supported by the ACT Government reaching its Renewable Energy Target of 100% by 2020.

Climate Change Risk Assessment was used to inform the design, incorporating adaptation measures to mitigate the impacts and improve resilience to extreme climatic events.

Community and Health: Partnership with Canberra Business Chamber for the development of small local Canberra businesses.


Citylink Tulla Widening (As Built, Excellent)

The CityLink Tulla Widening Project – Bulla Road to Power Street (CTW) involves the upgrade and widening of 16km of the western link portion of CityLink, increasing the road’s capacity, boosting performance and improving safety. It will also cater for future transport needs of growth areas in Melbourne’s west and north. The scope of works extends along CityLink from the Tullamarine/Calder Freeway Interchange to the West Gate Freeway, and along the West Gate Freeway from Graham Street to Power Street in Melbourne.

This project, registered by CPB Contractors, achieved an Excellent As Built v1.2 IS Rating.

Rating highlights include:

Material impacts – A 43% reduction in material impact was achieved through:

  • Substituting reinforced concrete pipe with green pipe. Green pipe is made from 100% recycled plastic (high density polyethylene) including a minimum of 95% food grade containers and has 0.2 MJ/kg less embodied emissions than reinforced concrete pipe.
  • Using recycled crushed concrete/masonry as a substitute to virgin crushed rock.
  • Reducing the amount of sub-pavement layers, pavement layers, and concrete structures.

Waste – An estimated 86% of the total value of materials used on the project can be reused or recycled.

Innovation - Two innovations obtained Australian firsts:

  • Hanging gantry demolition platform – A bespoke 49m long hanging gantry was used in demolition works instead of a more traditional ground level elevated work platform, providing significant safety, environmental and community benefits.
  • Temporary noise walls – Five-metre high temporary noise walls were used during construction to meet freeway noise limits and provide noise attenuation for the surrounding community. Placed in the emergency lane of an existing live freeway and adjacent to freeway traffic, the temporary walls avoided the need for excavation/piling for footings and associated geotechnical investigations, along with potential service strikes and additional energy use. The concrete barriers/footings are readily recycled (high value) and the metal posts and panels can be reused or on sold.

Level Crossing Removal Project: Western Program Alliance - Kororoit Creek and Abbotts Road (Design, Excellent)

Kororoit Creek Road is used by 22,000 vehicles each day and is part of VicRoads’ Principal Freight Network. It is a key transport corridor that connects the Williamstown North industrial precinct, nearby ports, and residential areas to the Princes Freeway. 

Abbotts Road is a major road that services Dandenong’s industrial precincts and also a major access point to the South Gippsland Highway. It often suffers long delays with the boom gates halting the many trucks and motorists who use this route. This level crossing has also been the site of tragedy, with two people killed at the crossing in the past seven years.

Removing the boom gates will create better freight connections, improve traffic flow, remove the risk of incidents between passenger trains and road vehicles including large freight vehicles and provide safer passage for pedestrians and cyclists.

This project achieved an ‘Excellent’ v1.2 Design IS Rating.

Rating highlights include:

Water The water reduction compared to the base case is calculated at 15%, achieved through reductions in dust suppression water requirements and a high efficiency project office. Additionally, over  70% potable water substitution was achieved, through rain water harvesting and treatment of ground water for construction use.

Knowledge Sharing The site has worked collaboratively with wider industry and actively communicated various initiatives and innovations to increase the speed with which sustainability outcomes can be achieved on major infrastructure projects. 

Innovations An Australian first innovation was awarded for the U-Trough bridge design (an alternative to a Tee Beam design), Victorian firsts were awarded for

  • a plastic multi-duct troughing system,
  • solar pedestrian traffic light,
  • Woody Meadows landscape design from the University of Melbourne and
  • recycled glass sand bedding material for use in the rail corridor.

Level Crossing Removal Project: Mernda Rail Extension (Design, Excellent)

Melbourne’s north is one of Victoria’s fastest growing areas. To meet the need for more local transport services, eight kilometres of rail line is being built from South Morang Station to the future Mernda Town Centre.

Three new stations are expected to cater for up to 8,000 commuters a day, helping to ease congestion along Plenty Road. The three stations will allow for about 2,000 car parking spaces, as well as bicycle storage and bus facilities. A new shared walking and cycling path will connect the stations and provide alternative transport options.

The Mernda rail extension project means around 1,200 construction jobs and more than 1,800 jobs in other businesses and industries in the area.

The Mernda Rail Extension project achieved an Excellent Design v1.2 IS Rating.

Rating highlights include:

Energy and Carbon An energy reduction of 22% and a GHG reduction of 28% was achieved through initiatives such as efficient LED lighting design, rail alignment, and excavation.

Materials A 21% reduction in GHG emissions was achieved through intelligent product sourcing, rail alignment optimization and high SCM content in cement mixes.

Heritage The project has had a key focus on heritage. This included the Bridge Inn Archaeological Dig, aimed at identifying and promoting local heritage values. The project furthered local knowledge of and appreciation for heritage, community open days were held for the site including school visits and displays of artefacts. Following this project the City of Whittlesea hosted the National Archaeology Week 2018. Events held included lectures, public displays and an exhibition.

The project is now complete with trains operational and is in the process of completing its As Built submission.


Level Crossing Removal Project: Hurstbridge Rail Line Upgrade (Design, Excellent)

The North East Project Alliance (NEPA) was established to remove four level crossings. 

The program alliance is an innovative approach to alliance contracting developed by LXRA to expedite the removal of 50 level crossings in metropolitan Melbourne over an eight year period. 

NEPA will remove the level crossings at: 

  • Grange Road, Alphington
  • Lower Plenty Road, Rosanna
  • Bell Street, Coburg
  • High Street, Reservoir

NEPA will also duplicate the track between Heidelberg and Rosanna, including: 

  • A new rail bridge over Burgundy Street; and 
  • Duplication of the rail tunnel under the Darebin Street/Hawdon Street intersection

This project by the Level Crossing Removal Authority has achieved an 'Excellent' Design v1.1 IS Rating.

Key highlights include:

Water A 92% reduction in water use is estimated for the project’s 60-year lifecycle. Water use reduction initiatives include the installation of a 15kL rain water tank, water-efficient features, and the elimination of a long-term irrigation system for landscaping.

Community health, wellbeing and safety Priority community issues addressed were: 

  • Enhance connectivity for pedestrians and cyclists in particular. 
  • Retain or create new areas of open space 
  • Concerned about construction impacts such as noise, road disruptions and dust. 
  • A safe and accessible railway station  
  • Foster an environment that ensures our local business succeed – from large industries to microbusinesses and freelancers  
  • Stimulate business, employment and investment opportunities

Heritage Several opportunities to enhance local heritage values have been implemented:

  • Preservation and reuse of the existing abutments of Burgundy Street bridge pays homage to the European history of the local area
  • The design of the station precinct, forecourt and landscaping celebrates and enhances the Modernist architectural history of the area
  • Indigenous employment was a feature of the alliance’s hiring and talent management process
  • Indigenous cultural training was held for the project team
  • Recognition of both Reconciliation and NAIDOC week in 2017: including staff morning teas where Elders and other representatives from the Wurundjeri Tribe Land and Compensation Cultural Heritage Council were invited to open the events with a Welcome to Country
  • A video was produced for NAIDOC week to celebrate Aboriginal and Torres Strait Islander history, culture and achievements. In this video an Indigenous staff member shared her personal story

Stakeholder engagement The community was invited to provide feedback on the colour of pedestrian and bicycle bridges, landscaping, and the use of open space.


Level Crossing Removal Project: Bayswater Alliance (As Built, Leading)

The Bayswater Level Crossing Removal Project was an Alliance consisting of Laing O’Rourke, Fulton Hogan, AECOM, the Level Crossing Removal Authority, VicRoads, Public Transport Victoria and Metro Trains Melbourne. In addition to the grade separations at Mountain Highway and Scoresby Road, the project re-built the Bayswater Train Station, the bus interchange, the train station car park, constructed a new grade-separated shared-use path and modified the streetscape along Mountain Highway.

The Project achieved a ‘Leading’ As Built IS v1.1 Rating and 4 Star Green Star Rating for Bayswater Train Station. The Project won the 2018 Outstanding Achievement Award for As Built, having also won the same award in 2016 for the design of the project.

In terms of rating highlights:

Climate Change Adaptation (Level 3 for Cli-1 and Cli-2 credits) - A comprehensive climate change risk and adaptation assessment was undertaken with input from the external stakeholders.

Energy & Carbon - The Project achieved a 44% reduction in energy use (equivalent to 107,462 GJ reduction from the baseline) and a 53% reduction in carbon emissions (equivalent to 23,433 tCO2-e reduction from the baseline) over total project life – construction and operation phases.

Initiatives implemented to achieve the reductions include:

  • Purchase of 50% GreenPower for the site compound
  • Use of biodiesel generators for the site compound
  • Altered railway corridor design
  • Use of LED lights for arterial road lighting
  • Use of solar PVs for bus shelter advertising
  • Use of LED lighting for the train station precinct and roads

Materials A 31% reduction in materials impacts was achieved through initiative, examples include:

  • Changing the design of the track alignment to significantly reduce bulk excavations and associated material quantities for rail infrastructure i.e. track, ballast, imported fill and sub-structures.
  • Change in the train station platform slab layout reducing pre-cast concrete components.
  • Reducing the length and grade of the cut for the station and underpasses reducing spoil quantities and imported construction materials.
  • 27% SCM average for all concrete used in the Train Station e.g. sub-structure, slabs, platforms, pre-cast ramp, stairs and landings.
  • 36% supplementary cementitious materials (SCM) in the concrete mix used for piles along the rail corridor and bridges.
  • 40% SCM in the concrete mix used for portions of the Shared Use Path which required no colour additive and for sections of kerb, gutter and islands within the car park.
  • HDPE piping used instead of conventional concrete pipes, PVC or polypropylene pipes.

Heritage The project coordinated the development of an Indigenous Mural developed by three local tribes from the Kulin Nation and students from Bayswater Secondary College. The students shot a video of themselves working on the mural and talking about their experience. Each tribe had a representative artist and each created one of the concepts in the mural. The three artists were Mandy Nicholson (Wurundjeri), Adam Magennis (Bunurong), and Gheran Steel (Boon Wurrung).


Stakeholder Participation
Comprehensive stakeholder engagement was initially undertaken by the local council. The project team reviewed all the previous stakeholder engagement and developed a stakeholder strategy that would facilitate the project outcomes and council requirements. This included stakeholder input into the engagement strategy. This included workshops, presentations, and meetings to obtain feedback from stakeholders that can be used as part of the design development, enabling innovative and integrated thinking - providing better definition of the project from a design, construction and cost perspective, as well as crafting an innovative solution that improves on a number of key results areas. The team also used Digital Engineering, Augmented Reality and Virtual Reality as a community and stakeholder consultation tool.


Metro Tunnel Early Works (Design, Leading) 

The $324 million Early Works Package for the Metro Tunnel Project is the first major expansion of Melbourne's underground rail network since the City Loop was constructed 30 years ago. The overall project connects the Sunbury and Cranbourne/Pakenham lines via nine kilometres of new tunnels and five new underground stations. The Early Works Package is to prepare critical work sites and help facilitate timely delivery of the project. The major works for the Early Works component commenced in early 2017 following planning approval for the Early Works Plan from the Minister for Planning.

Another winner at the IS 2018 Awards, The Metro Tunnel Early Works package includes:

  • The relocation of power, drainage, gas, water, sewer and telecommunications services to clear the alignment prior to the Main Works commencing in 2018.
  • The construction of two access shafts in Franklin Street and A’Beckett Street to enable future construction of the stations.
  • Major site preparation works including land clearing, property demolition, temporary relocation of monuments and tree protection and removal across all precincts.

The completion of the Metro Tunnel Project by 2026 will create space for more trains to run more often across Melbourne’s rail network. This will create capacity for 39,000 more passengers during each peak period, reduce road congestion and pave the way for future expansion of Melbourne’s public transport network.

Project highlights include:

Community Health and wellbeing: The project successfully embarked on various social procurement and workforce strategies.

  • Over 30% female staff and 50% of the leadership team are women, including the Project Director, breaking the mould of a typical construction project, and creating a culture of respect for women in the industry.
  • Through a focus on employment of priority jobseekers the project has achieved to date 2.74% Aboriginal participation and 132,274 hours by cadets, apprentices and trainees.
  • An industry night held at Melbourne Town Hall attracted an audience of over 150 potential tendering companies. A key theme of the night was introduction to project sustainability requirements, commitments and expectations, particularly around workforce diversity.
  • This was followed up with the Workforce Initiative Event, at which project contractors were introduced to support group training organisations, networked with job-ready apprentices and heard lessons learnt from a peer contractor regarding their initiatives.

The project has contributed positively to people’s health and wellbeing.

  • Initiatives were designed to generate positive social outcomes for the wider community including temporary creative aspects embedded into construction elements such as hoarding to turn ‘disruption into delight’, purchasing through social enterprises and employment of priority jobseekers.
  • An innovative upgrade of two roundabouts uses a Victorian first design that gives pedestrians and cyclists right of way through raised ‘wombat’ crossings, providing increased visibility and slowing traffic on their approach.
  • The MTEW team took pride in its project values of Care, Generosity and Fun, raising over $13,500 for various charities through events such as Around the Bay, Movember, clothing drives and raffles. Mental health was also a priority of the team assisted through mental health first aid training and multiple campaigns amongst the team workforce.

Heritage - The project is located in Melbourne CBD, much European and Indigenous heritage was identified as well as the intangible heritage of the city. As a part of a wider program the project was responsible for managing heritage through the course of their works and where relevant ensuring that any heritage items are handed over to the relevant other packages of work in the program for interpretation and monitoring.

Key initiatives include:

  • Extensive survey and monitoring of heritage buildings including the use of drones, tiltmeters, crack meters and other monitoring devices.
  • Archival recording of heritage sites prior to demolition and lodgement of the records with the State Library of Victoria.
  • Archaeological digs and lodgement of new archaeological sites with Heritage Victoria.
  • Incorporation of heritage elements into artwork established on site hoardings.

RPV and the project had to undertake a substantial amount of stakeholder engagement to ensure that heritage concerns were met. 

Stakeholder Participation (full marks) - Given that this is package of works is part of the biggest infrastructure project happening within Melbourne to date a substantial amount of stakeholder consultation has been undertaken by RPV and the project to ensure that stakeholder concerns and outcomes are met.


Rail Network Operations (Operations, Commended)

An exciting feat for ISCA, and the IS Community, as this is the first IS Asset to receive an operations rating!

Metro Trains Melbourne operates a metropolitan rail system spanning 16 lines, 219 stations and more than 800km of track. The company delivers over 14,000 services every week, with a train departing every 30 seconds in the peak. It also maintains all assets across the network including tracks, signals, electrical overhead, rolling stock, buildings and structures.

Metro Trains Melbourne has made significant advances in its management systems, ecology strategy, wellbeing and safety, accessibility, corporate social responsibility and procurement practices. The company has also written clear sustainability objectives into its new rail franchise contract with Public Transport Victoria to 2024.

Rating highlights:

Management Systems - MTM has a comprehensive management system that is being improved to incorporate sustainability requirements. The new franchise agreement (MR4) includes commitments to restore and enhance environmental and social aspects of operations and aligns with the UN SDGs.  

Procurement and Purchasing - MTM's Procurement Policy requires suppliers to be Green-flagged in the prequalification system, in which suppliers are required to enter detailed information about their Sustainability Policies. In MR4, MTM have made a commitment to include broad ranging sustainability considerations directly into their procurement policy. 

Community Health and Wellbeing -

  • Metro’s Accessibility Reference Group is comprised of independent disability advocates who are helping to make the railway more accessible through multiple initiatives.
  • Raised Boarding Platforms and Platform Gap Fillers have been introduced to enable wheelchairs and other mobility aids to seamlessly board trains at key locations around the network.
  • Red button assistance at unstaffed stations in consultation with Vision Australia and Guide Dogs Victoria.
  • Equipping of frontline staff with electronic devices and apps approved by Scope.
  • New mechanical pushers for staff, so they can safely assist wheelchair users at designated stations.
  • Major inner city stations are being fitted with upgraded facilities for assistance animals.
  • Trauma management: Trauma Management Steering Committee implemented initiatives to prevent suicides on the railway network. MTM is committed to going beyond Transport Safety Victoria's recommendation to install fencing at suicide hot spots, with the fencing initiative to sit within a broader suicide prevention strategy. For example, MTM is displaying digital Lifeline posters and will roll out posters in suicide hot spots and conduct suicide awareness training.
  • MTM has made commitments under MR4 that have informed the Corporate Responsibility Plan and Strategy. This includes launching a disadvantaged worker program for priority job seekers (auto workers, indigenous employees and people experiencing long term unemployment).

Ecology - MTM has a comprehensive draft Biodiversity Management Plan (BMP) and Biodiversity Procedure that outlines specific and targeted programs to effectively manage the protected species contained within biosites across the metro network.


Port Drive Upgrade (As Built, Excellent)

Seymour Whyte, on behalf of Port of Brisbane Pty Ltd (PBPL), has delivered the $110m Port Drive Upgrade between the end of the Port of Brisbane Motorway to Whimbrel Street at Fisherman’s Island, Queensland. The upgrade which was brought ahead of capacity demand, delivers safer and more efficient port roads, and will help ensure that the Port of Brisbane continues to meet the needs of industry and customers as trade grows.



The Port Drive Upgrade was the largest road project ever undertaken by PBPL and has delivered significant safety improvements.

In achieving an Excellent rating for both Design and As Built, Port Drive Upgrade exceeded in:

Climate Change Adaptation

The key measures identified in the Climate Change Risk Assessment report were in relation to detailed design requirements for the road alignment, flood modelling and drainage resilience.

Water - The project achieved a total water use reduction of 29% across its lifecycle.

Innovation - The upgrade also incorporated innovative design and working methods that will improve efficiency of the road network within the port precinct.

Lucinda Drive Bridge

At Lucinda Drive, an innovative Super I girder was used to build the new bridge over Port Drive and the railway line. The original design required a 5-span bridge to be built. The innovation in the new design allowed for a 3-span bridge to be built using special Super I girders.

The design allowed bigger spans; and eliminated the need to have a pier positioned within the railway line corridor.

The Super I girder has now been approved by the Queensland Department of Transport and Main Road for use across Queensland.

Road surfacing

EME2 sustainably-sourced asphalt reduced the need for asphalt thicknesses for heavy duty pavements; and lowered the construction and maintenance costs. The project laid 51,346 tonnes of EME-2 asphalt.

The Port Drive upgrade was one of the first major projects to use this technology in Australia.

Offsite stormwater treatment

 PBPL elected to use the offsite stormwater treatment initiative as part of the project’s stormwater management requirements. Offsite stormwater treatment complements the onsite treatments for the project such as grass swales, trash racks and good site management.

Nearly 1km of Laidley Creek’s eroding banks was repaired with a view to reduce future sediment pollution from bank erosion and improve the quality of the Brisbane River at the Port. When combined with effective onsite treatments, this approach will deliver the best stormwater management outcomes for the project.


Sydney Metro Program (Design, Leading) 

Another exciting first for ISCA – the first program of works to receive an IS Rating, and a Leading ISCA IS rating.

Sydney Metro Northwest is the first stage of the Sydney Metro railway network, Australia’s biggest public transport project, being delivered by the NSW Government.

The $8.3 billion Sydney Metro Northwest runs from Rouse Hill to Chatswood and will be Australia’s first fully automated metro rail system. The project is delivering 36 kilometres of new metro rail and a reliable public transport service to a region with the highest car ownership levels per household in Australia.

Sydney Metro Northwest is being delivered through three major construction contracts, all of which have been required through contractual documentation to obtain an Excellence or higher ISCA Design and As-Built rating. To date all contracts have achieved a Leading Design rating, and the two completed contracts have also achieved a Leading As-Built rating. The three contracts are:

  1. Tunnels Stations and Civils
  2. Surface, Viaduct and Civils
  3. Operations and Construction

These three contracts packages form the Sydney Metro Northwest program Design IS rating, an ISCA first. Sydney Metro Northwest received a Leading ISCA IS Design rating.

The construction of Sydney Metro Northwest is meeting and exceeding its sustainability targets – leading Australia in best practice sustainability. Sustainability has been core to the Sydney Metro Northwest project from the beginning. A sustainability strategy for the project was developed early on and initiatives identified were made contractual requirements. Working hand-in-hand with delivery partners Sydney Metro was able to achieve exceptional achievements and outcomes in the sustainability space.

“As such a large program of works, we recognise our ability to influence industry and set new benchmarks and standards in environmental and socio-economic spheres.”

Tom Gellibrand Former A/Program Director and Chief Executive of Sydney Metro, Sustainability Report 2017

The tunnels, stations and civils contract package for Sydney Metro Northwest also holds the highest ever As-Built ISCA IS rating, a score of 92.5 (Leading).

Energy & carbon – 100 per cent offset of operational energy through a new build renewable energy project in rural NSW, and a 1.1 MW solar array on top of the Sydney Metro Trains Facility.

Climate resilience – climate change mitigation and adaptation has been a key focus for the project from day one, this is reflected in the design of stations and tunnels.

Waste & spoil – 96 per cent recycling rate of construction material, and 100 per cent clean spoil has been beneficially reused.

Whole of life – 95 per cent of a Sydney Metro train is recyclable at end of life, and life cycle cost analysis has been integrated into design and key decision making to ensure lowest impact from the commencement of the project in 2011.

Green infrastructure - Nearly one million native and drought resistant vegetation planted along the Sydney Metro Northwest alignment.

Workforce - Over 1300 new sustainable jobs created during tunnels, viaduct and operations works on the Northwest project (more than 40 per cent of these jobs are from Greater Western Sydney).

Skills & Jobs - The establishment of the NSW Infrastructure Skills Centre, the first integrated infrastructure skills and employment centre in Australia and the Sydney Metro Industry Curriculum was introduced to address skills gaps.


Sydney Metro Northwest - Surface and Viaduct Civils (As Built, Leading)

The Surface and Viaduct Civils package for Sydney Metro Northwest involved the construction of an elevated four kilometer skytrain viaduct (including associated civils works) between Bella Vista and Cudgegong Road, Rouse Hill.

The skytrain viaduct is at a height of between 10 metres and 13 metres above ground level and is supported with 130 concrete piers, spaced approximately 39 metres apart. The two new railway stations on the viaduct, Kellyville and Rouse Hill, are elevated and the platforms are above ground.

A landmark 270-metre long cable-stayed railway bridge over Windsor Road at Rouse Hill also forms part of the viaduct. This is similar in design to Sydney’s Anzac Bridge.

The viaduct has been developed, in response to community consultation, to help reduce construction impacts of Sydney Metro Northwest on motorists and the community. The design also means that any future upgrade of the Windsor and Schofields Road intersection will not be impacted by the operation. It also minimises impacts on local flood plains.

The viaduct will be used only by passenger trains,. The viaduct is a critical part of the Sydney Metro Northwest, improving access to jobs and services for existing communities and new growth areas in the north west of Sydney.

The single span bridge is an Australian first. It is the first single span curved railway bridge. This new railway bridge was awarded the Global Best Project Award for design and construction by Engineering News-Record.


WestConnex M4 East (Design, Leading)

The M4 East is the first underground section of WestConnex and will extend the existing M4 Motorway with two new 5.5 kilometre tunnels, three lanes in each direction, from Homebush to Haberfield. The extension will reduce the bottleneck at the end of the M4, saving travel time for motorists and removing cars from local streets. It will provide a bypass of Parramatta Road and a connection to the City West Link.

This project achieved a Leading Design IS Rating. Here’s how they did it:

Full marks for Heritage – The following are some of the interpretation content proposed for the locations at Concord Interchange, Concord Oval Car Park and Wattle Street Interchange at Haberfield:

  • Interpretive Landscaping – incorporating text into the fabric of the cycleway aligned along the west side of the park
  • An interpretation sign to be located in Concord Interchange park
  • Salvaged bricks and sandstone to be re-used as landscape elements within the park
  • To include information and images associated with the early development of the area as well as the importance of Concord Road and the Main North Line in opening the area up to urbanisation and industry

Full marks for Procurement - The publicly available WestConnex Sustainability Strategy details sustainability objectives and requirements and these were embedded in the project contract through the SWTC and were captured in the Project’s Delivery Phase Sustainability Plan.

All potential suppliers are issued the standard subcontractor pack for pre-qualification. Pre-award meetings are also held to discuss possible sustainability / innovation in the supply of goods and services.

Discharges - The flood assessment has shown that there would be no adverse flood impacts to adjoining properties or increase in flood hazard as a result of the increased peak flows across the project in events up to and including the 100 year ARI.

The project’s ventilation facilities located at Underwood Rd, Cintra Park, and Parramatta Road, have been designed with acoustic attenuators on both the environment side and tunnel side of the fans to mitigate noise from the air path.

The project is striving for full compliance and minimal pollutant contribution. Achieving zero exceedances for operational pollutant concentrations will be challenging due to  the nature of Sydney’s ambient air quality. Actual results will be presented in the As Built submission.

As required by AS1158, the Upward Light Ratio for the projects public roads will be less than 3%.

Energy and Carbon - The Project has modelled a 26% reduction in greenhouse gas emissions across the project lifecycle. The following are the energy initiatives:

  • Improved efficiency and flow design on ventilation fans (27%)
  • Improved efficiency in tunnel lighting (31%)
  • Use of light coloured road surface to reduce lighting demand to illuminate tunnel (30%)
  • Reduce contrast effect at portal to minimise transition lighting (15%)
  • Use of Greenpower in construction electricity (6%)

WestConnex Stage 1a: M4 Widening (As Built, Excellent)

The M4 Widening is Stage 1a of the WestConnex Project. WestConnex has upgraded and linked the M4 at Parramatta with the central business district, airport and port precincts and the M5 at Beverly Hills. The M4 Widening has upgraded the M4 to four lanes in each direction between Church Street, Parramatta and Homebush Bay Drive, Homebush. Key features of the Project include:

  • Widening of the motorway in the existing corridor between Junction Street, Silverwater and Homebush Bay Drive, Homebush.
  • New access from Hill Road, Sydney Olympic Park to the M4 eastbound.
  • A new access ramp for southbound Homebush Bay Drive motorists to access the M4 westbound, helping alleviate congestion and removing the need for a right hand turn at traffic lights.
  • A new elevated road on the southern side of the M4 between Church Street, Parramatta and Wentworth Street, Granville
  • A new bridge between Wentworth Street, Granville and Junction Street, Silverwater.

 The Rizzani de Eccher Australia Pty Ltd / CPB Contractors Pty Ltd Joint Venture (RCPBJV) were awarded the contract to design and construct the M4 Widening Project in December 2014 and construction commenced in May 2015.

This project achieved an Excellent As Built IS Rating. Rating highlights included:

Stakeholder Participation - This is a fairly media intensive project along with the other Westconnex projects and the outcomes of the stakeholder surveys showed that the project team has done a lot of work with the community and stakeholders.

Ecology - It was identified that most of the ecology within the alignment of the project had a low biodiversity value due to the urban context. Therefore, the Biobanking scheme has been used to offset the biodiversity of the project. Areas of threatened or high value ecology were managed by the project to maintain the value in these areas.


Wickham Transport Interchange (As Built, Commended)

Laing O’Rourke was engaged to construct a new fully-accessible transport interchange at Wickham as part of an integrated transport solution to help drive urban renewal in the Newcastle city centre. The new interchange will enable customers to easily connect with trains, light rail, regional buses, taxis and cars. Key features include:

  • New intermodal fully accessible interchange
  • Taxi spaces and a kiss-and-ride facility
  • New platforms and concourse
  • Fully accessible pedestrian bridge over the rail corridor
  • New crew and staff facilities
  • New power system, communication and lighting systems
  • Modifications to existing roads and overbridges
  • Rail infrastructure and stabling yard
  • Provision for future Light Rail (light rail to be constructed by others)

Rating highlights include Heritage - Significant consultation and community engagement was undertaken in relation to both Indigenous and non-Indigenous heritage. Thousands of Aboriginal Artefacts were uncovered on site in a salvage excavation, and impacts on nearby non-Indigenous heritage were also managed including the Hamilton Railway Station Group. Signage was also installed at Wickham Transport Interchange to interpret both Indigenous and non-Indigenous heritage.

Waste was managed well on the project with a range of measures being implemented to minimise waste during construction and operation, and which resulted in landfill diversion rates of:

  • 81% of spoil
  • 98% of inert and non-hazardous waste
  • 41% of office waste
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