The Gateway WA Perth Airport and Freight Access Project, valued at $1 billion, comprised the widening 7km of Tonkin Highway to six lanes, upgrading 3km of Leach Highway to expressway standard, constructing four new grade separated interchanges and upgrading a fifth interchange, including the Grand Gateway three-level interchange that provides new access to Perth Airport.
Gateway WA incorporates road and bridge improvements, local road modifications, 21km of continuous grade separated shared path and local connections for pedestrians and cyclists. In addition, it has delivered 6km of noise/screen walls, landscaping, including installing approximately one million plants, embracing innovative urban design and intelligent transport system technology.
The project achieved the second highest Infrastructure Sustainability (IS) rating for a completed infrastructure construction project in Australia and was awarded an ‘Excellent’ IS As Built rating by the prestigious Infrastructure Sustainability Council of Australia (ISCA).
A number of sustainable initiatives delivered by the Gateway WA Alliance team led to the achievement of the ‘Excellent’ IS As Built rating, including:
- outstanding management of substantial volumes of waste;
- relocating animals found in the project area;
- working with members of the local Aboriginal community to enhance the recognition of heritage through public art; and
- delivering an innovative design for the new Roe Highway/Berkshire Road interchange, the first of its kind in Australia.
Key sustainability outcomes delivered by Gateway WA
- Waste management: The Gateway WA Alliance excelled in managing waste. Waste management practices included recycling more than ninety five percent of waste sent offsite and processing 850,000 tonnes, the equivalent of 38 Olympic sized swimming pools, of unsuitable material onsite, diverting this from being sent to landfill.
- Protection of fauna and minimisation of clearing: During the project design phase, planning took place to survey more than 1,000 established trees in the clearing zones to analyse for potential retention. Gateway WA also undertook a program for trapping and relocation of animals found in the project area, this included relocating more than 100 bandicoots prior to clearing.
- Recognition of heritage: Members from the Gateway WA project team and the local Aboriginal community worked together to inform the project scope with the aim of reducing impact to heritage sites within the project area and enhancing the heritage through urban design and public art features. The City Link Noise Wall Art work, incorporating an acknowledgement of Noongar land and culture written in both English and Noongar languages, is an example of the recognition of the heritage of the area.
- Innovation: Gateway WA was rewarded for their innovative ‘tennis ball’ or ‘cut-through’ design of the Roe Highway/Berkshire Road interchange, the first of its kind in Australia. This innovative design was aimed at improving road user safety by reducing the impact of potential crashes.