Coalfields Highway


Current Status: Remaining Works

Works on the Coalfields Highway upgrade near Worsley are scheduled to finish in April 2017. This marks the completion of the major upgrade to the highway which commenced in 2010, and involved significant realignments, upgrades to intersections and providing additional overtaking opportunities.

This $53 million project aims to increase safety, increase overtaking opportunities and ultimately reduce the number and severity of crashes.


Completed works

The State Government announced on 21 September 2015 that Brierty Ltd had been awarded the contract for the reconstruction of 7.7 kilometres of road to complete the highway upgrade involving:

  • Reconstruction and realignment of approximately 7.7 km of road from just west of Wellington Dam Road to the start of recently completed works.
  • Reinstatement of the existing eastbound and westbound passing lanes.
  • Upgrade of the Gastaldo Road intersection to include a right turn acceleration lane for vehicles turning right onto the Coalfields Highway.
  • Upgrading the Wellington Dam Road intersection to provide a separate lane for right turn movements from Coalfields Highway.
  • Reinstatement of Department of Parks and Wildlife (DPaW) infrastructure (parking bay entrance, Munda Biddi Trail crossing).
  • Rationalisation of DPaW management tracks.

A newsletter was distributed throughout Collie and surrounding areas in September 2015.

The 2.6 kilometre Hamilton River section between the water pipeline and the previously completed Shine's section was sealed and opened to traffic in May 2015 – one year earlier than previously programmed.
The project included realignment of the Hamilton River causeway, reinstatement of the passing lanes, improved drainage, widened road shoulders and safety barriers.

Benefits of the roadworks include;

  •  improved road alignment with safer passing opportunities;
  •  increased road width including the introduction of a one metre painted central median;
  •  more forgiving roadside verges;
  •  safer driveway accesses;
  •  improvements to road drainage to help manage road runoff entering the Hamilton River catchment;
  •  construction of an improved access from the highway for the Department of Parks and Wildlife (DPaW) campsite just east of the Hamilton River crossing;
  • rehabilitation and revegetation of roadside verges; and
  • rationalisation and maintenance of DPaW management tracks.

Sincere thanks to all road users, residents, businesses and campsite patrons for your patience during the works.

Other previously completed works include:

  • A 4 kilometre extension of the existing climbing lane on Roelands Hill - opened to traffic in May 2014.
  • Improvements to the section just west of Allanson to Collie - completed in 2012.


Project Background

The Coalfields Highway Upgrade is a $53 million project that is expected to increase safety, increased overtaking opportunities and ultimately reduce the number and severity of crashes. 

For further information regarding the history of this project, please see the Publications section below. 


Project Need and Community Benefits

The upgrade of the Coalfields Highway has been ongoing over the last 30 years. Further improvements were required for several reasons:

  • There were sections of narrow sealed width, unsealed shoulders and poor geometry (winding, tight curves and crests).
  • Safer overtaking opportunities were required for road users to easily overtake slow vehicles.
  • Increasing volumes of traffic use the route, including more heavy vehicles and oversized loads servicing the mining, industrial and agricultural sectors.
  • Adjacent vegetation close to the edge of the road, including large trees posed a traffic hazard to the road user.


The project aims to:

  • Increase road user safety and reduce the number and severity of crashes.
  • Cater for increasing traffic volumes.
  • Meet changing transport needs, including reducing freight costs.


Budget and Timing

Further to the $25 million allocation initially announced, the 2013/14 State Budget confirmed that an additional $28 million would be provided to continue upgrading works on the Highway with the following delivery timeframe:

  • 2013-14 – Roelands Hill (complete)
  • 2014-15 – Wellington and Hamilton Sections
  • 2015-16 – Gastaldo Sections


Managing the Environment and Sustainability

We worked closely with local Department of Parks and Wildlife (DPaW) staff throughout this project in an effort to minimise the impacts of the project on the environment, particularly where the new road interfaces with Wellington National Park. We committed to the following measures to reduce impacts both before and after construction:

  • Ensuring minimal impact on potential black cockatoo habitat
  • Optimise the road footprint by steepening batters and introducing new sections of safety barrier.
  • Walking the entire length of the alignment on both sides to identify ways to save significant vegetation on the edges of the road.
  • Work with a fauna spotter during all clearing to manage fauna.
  • Once completed, use native species common to the area to rehabilitate road batters, surplus land (including the existing road), various tracks, and several existing materials pits within the National Park.
  • Use kerbing, pipe drainage and basins at strategic locations to manage runoff into water courses.
  • Use area specific topsoil management and hygiene plans to minimise the spread of weeds and dieback. 
  • Undertake Acid Sulphate Soils investigations and monitoring in high risk areas around water courses.
  • Ongoing consultation with affected landowners and Aboriginal representatives.


Sustainable outcomes have been a priority with the following initiatives already implemented:

  • Engaging with DPaW and Forest Products Commission (FPC) to identify mill quality timber that could be harvested and used in the National Park, or for craft wood purposes. A number of logs have been made available to the open market via public tender.
  • Re-using any remaining timber and vegetation by mulching it for rehabilitation.
  • Making best use of the naturally occurring road building materials available on site by balancing earthworks, and processing the gravel resource available from the Wellington Dam Section.

Environmental Consultation and Documentation

Working with the local offices of the Department of Parks and Wildlife, we undertook a number of environmental surveys and heritage consultations to determine impacts and how these should be managed throughout the project.  This information was used to prepare an Environmental Impact Assessment and subsequently, the project was referred to both the Environmental Protection Authority (State Government) and the Commonwealth Department of the Environment (formally Sustainability, Environment, Water, Population and Communities) 



September 2014 newsletter

April 2014 newsletter

August 2013 newsletter


Community Information

We welcome queries or feedback from the community.  Please contact Carolyn Walker on:

Phone: (08) 9450 1445 (8am to 6pm)


For contracting or supplier enquiries

Tel: 138 138



Modified: 13 Apr 2017