Helping to build and construct a $1.25 billion motorway
Transmission Gully is one of New Zealand’s most significant greenfield roading projects. Greenfield construction is where development takes place on land that has never been used for built environments. At 27 kilometres long, the corridor has four lanes, 25 bridge structures, and four grade-separated interchanges. The project was the first roading project in New Zealand to be procured under a public-private partnership delivery model—to finance, construct and operate large, complex pieces of infrastructure.
As technical advisors we provided pre-contract and post-financial support. For pre-contract tasks we prepared a site investigation program and managed additional geotechnical analysis and baseline environmental monitoring programs. We supported the tendering process, reviewed safety audit reports, assisted with negotiating technical schedules, and scoped the final independent reviewer agreement. During the design and construction phase, we reviewed design documents against works requirements and good practice, observed construction, and monitored construction methodology and quality. We also provided management, surveillance and quality assurance (MSQA) tasks on related projects like the Pāuatahanui Golf Course Redevelopment.
By focusing on the key project outcomes—high safety, reduced travel time, route resilience, and increased customer satisfaction—we helped Waka Kotahi deliver a safer, more reliable, and resilient motorway.
At a Glance
- Offices
- Client
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- Waka Kotahi NZ Transport Agency
Keith Weale, Principal Transportation Engineer
I’m not one to turn to the book of standards to find ready-made solutions. I’m a problem solver and I see the wider context.
Eleni Gkeli, Technical Specialist, Rock Engineering/Geotech, Pavements & Structures Leader
I’m proud that my work helps to maintain critical infrastructure of regional and national significance.
Jeremy Walters, Chief Engineer/Technical Specialist, Bridges
My work in transport and water brings a variety of challenges—if variety is the spice of life, it certainly keeps my job interesting!
Kirstie Thorpe, Senior Principal Landscape Architect & Urban Design/Team Lead, Landscape & Urban Design
I weave threads of landscape together and incorporate their values into infrastructure projects.
Keane Kannan, Senior Principal Civil Engineer/Highways Drainage Practice Leader
The infrastructure I help design has enduring social and environmental impacts—I’m committed to making them positive.
Hayley Swan, Senior Landscape Architect
I am committed to designing nature-based solutions that are both culturally and ecologically sensitive.
We’re better together
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Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.