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Public Private Partnership

In July 2014, the Transport Agency signed a PPP contract with Wellington Gateway Partnership.

Transmission Gully motorway project before the Public Private Partnership (PPP)

Following decades of discussion and proposals, Wellington’s iconic Transmission Gully motorway project is underway.

On this page you'll find information about the Transmission Gully motorway project, before the Public Private Partnership (PPP) was signed.  For all information on the design and construction of the Transmission Gully motorway by the Public Private Partnership consortium (Wellington Gateway partnership), please go to the Transmission Gully motorway project page.

Chronological timeline

There’s been documented public interest in an inland route through Transmission Gully going back as far as 1919. However, it has only been in the last two decades that public views have been canvassed more formally.

In 2008, two major public consultations were undertaken to ask residents of the greater Wellington region if a route through Transmission Gully should be progressed. Both public consultations returned overwhelming support for a motorway through the gully.

In the first half of 2012, regulatory consent applications for the project were heard and approved by an independent Board of Inquiry. And in November 2012, the NZ Transport Agency received the Government’s approval to proceed with the Transmission Gully motorway through a Public Private Partnership.

  • 2008

    In 2008, during Phase 1 of the Transmission Gully project, the NZ Transport Agency undertook public consultation on the preferred route through Transmission Gully. The consultation resulted in 88.6% of respondents supporting the preferred route.

  • 2010

    In 2010, during Phase 2 of the project, engagement on design and environmental matters was undertaken with iwi, community groups, statutory agencies and territorial/local authority stakeholders in preparation for the lodgement of Notice of Requirement (NoR) and resource consent applications with the Environmental Protection Authority (EPA).

    In September 2010, the Transport Agency lodged a request with the Environmental Protection Authority (EPA) seeking changes to the Wellington Regional Freshwater Plan to provide a clearer policy framework within which resource consent applications for activities in and on water bodies can be considered.

  • 2011

    A Board of Inquiry hearing was held on the request in July 2011 and the Board announced its final decision on 10 October 2011. Details of the final decision can be accessed here(external link)

    (external link)On 15 August 2011, the Transport Agency lodged the applications with the EPA and detailed information on the applications, process and timeframes. 

    On 24 August 2011, the Environmental Protection Authority (EPA) recommended to the Minister for the Environment that the regulatory consent applications lodged for the Transmission Gully project be directed to a Board of Inquiry as a proposal of national significance. 

    On 16 September 2011, the Minister for the Environment directed that the applications be referred to a Board of Inquiry.

    The Minister for the Environment's media statement on the applications referral can be accessed here(external link).

    The Transport Agency's media statement on the applications referral can be accessed here(external link).

    The Minister of Transport's media statement on the applications referral can be accessed here(external link).

  • 2012

    The Board of Inquiry’s hearing on the Transmission Gully applications was conducted from 13 February 2012 to 15 March 2012.

    The Board of Inquiry’s draft decision was released on 4 May 2012. The draft decision can be viewed here(external link)

    On 22 June 2012, the Board of Inquiry released its final decision on the Transmission Gully applications. The Board’s decision can be accessed here(external link)

    In August 2012, the Minister of Transport directed the Transport Agency to assess the suitability of using a Public-Private Partnership (PPP) procurement model to design and build the highway.

    Following an extensive business case analysis (using the Treasury’s better business case framework), the Transport Agency determined that the project meets the Treasury’s criteria for a PPP procurement model.

    In November 2012, the Cabinet gave the Transport Agency approval to finance and build the Transmission Gully highway using a PPP. The Transport Agency was also given approval to borrow up to the estimated costs of traditional procurement as part of the PPP. Final approval of the borrowing limit will be confirmed by the Cabinet before the Transport Agency awards the PPP contract.

  • 2013

    In January 2013, the Transport Agency called for ‘Expression of Interest’ from consortia (New Zealand and overseas) interested in and capable of delivering the Transmission Gully Public Private Partnership (PPP) project.

    In April 2013, the Transport Agency announced the two consortiums shortlisted to deliver the Transmission Gully Public Private Partnership (PPP) project. These were the Wellington Gateway Partnership and the Positive Connection consortiums.  A request for proposal (RFP) was issued to the consortiums and their proposals underwent a rigorous evaluation process to select the preferred bidder for the project.

    In December 2013, the Transport Agency announced the Wellington Gateway Partnership as the preferred bidder to finance, design, build, operate and maintain the Transmission Gully Public Private Partnership (PPP) motorway.

  • 2014

    In July 2014, the Transport Agency signed a Public Private Partnership contract with the Wellington Gateway Partnership.  Under the terms of the PPP contract, the Wellington Gateway Partnership will design, construct, finance, operate and maintain the new Transmission Gully motorway for the 25 years that will follow the expected five-year period to build the motorway. It is aimed to have the motorway open for traffic by 2020.


Transmission Gully applications to the Environmental Protection Authority (EPA)

In August 2011, the NZ Transport Agency applied for designation and resource consents for the Transmission Gully section of the Wellington Northern Corridor road of national significance project (Levin to Wellington Airport).

The NZ Transport Agency’s applications sought approval to construct 27 kilometres of inland motorway through Transmission Gully linking Mackays Crossing in the north with Linden in the south. Transmission Gully is so named because it generally follows the route of the Paekakariki-Takapu Road 110 kV electricity transmission line.

All of these applications were lodged under the new national consenting process through the EPA, and heard through a Board of Inquiry.

The EPA was set up as part of a governmental move to streamline and simplify the resource consent application process. One of the benefits of the EPA process is the shorter time frame for considering applications, which, therefore, allows outcomes to be known much more quickly than previously. The entire consenting process, using the EPA path, took less than a year.

View the Transmission Gully applications to the EPA.