Transmission Gully Motorway, Wellington NZ

Completion Date: 

2020

Project Details: 

Transmission Gully motorway is a four-lane 27 km state highway, that has recently been completed, that runs from Linden to McKay’s Crossing (north of Paekākāriki) passing through the rural areas to the east of Porirua and Whitby. The motorway provides a new route for State Highway 1 and will have connections to Porirua City’s local roading system at Kenepuru Drive (near Bowland), Warspite Avenue (near Waitangirua Mall), the southern end of James Cook Drive and State Highway 58 just east of Pāuatahanui. 

The following key facts help paint the picture of large this roading project was:

  • 27 kilometres long
  • Six years to construct
  • 11.4 million cubic metres of earth excavated/moved
  • 660,000 tonnes of aggregate brought to site
  • 104,000 cubic metres of concrete used
  • 7,900 tonnes of reinforced steel used in bridges and other structures
  • Over 115,000 tonnes of asphalt laid
  • 25 bridges and large culverts
  • Longest bridge: Te Ara a Toa (Bridge 20) – 230 metres
  • Highest bridge: Te Ara a Toa – 60 metres
  • Largest cutting: Pouāwhā – Wainui Saddle – 70 metres high
  • 534 hectares of ecological mitigation and replanting (includes 2.5 million native trees and plants)
  • Eight streams modified/diverted
  • Over the course of the construction around 7,700 people have worked on site*

Rockbond supplied a wide range of products to the HEB/CPB Joint Venture, mainly working with the HEB Team on the concrete structures & barriers. Rockbond’s 7.17EX Surface Retarder-Plus EXTRA (for 40+ MPA Concrete) was originally developed for the bridge columns on Bridge 20 (Te Ara a Toa). Due to the high strength concrete being used, standard surface retarders didn’t provide a deep enough etch for the exposed ‘construction joint’ surface required on the top of each pour….hence 7.17EX was born!

Rockbond supplied over 130 tonne of 1.04 GP Grout-Plus for grouting in the concrete road barriers on this project….a mammoth task in a short time frame at the tail end of the project.

Key Products Used:

Project Partners:

  • CBP HEB Joint Venture
  • Silverstrand
  • Construction Contracts Ltd
  • Geovert

ROCKBOND

Freephone
0800 76 25 26
Phone
04 568 5401
Email
sales@rockbond.co.nz

Address
7 Te Puni Street, Petone
PO Box 38 526
Wellington 5045


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ROCKBOND

Freephone
0800 76 25 26
Phone
04 568 5401
Email
sales@rockbond.co.nz

Address
7 Te Puni Street, Petone
PO Box 38 526
Wellington 5045


ENQUIRE

DON'T MISS OUT!

Sign up for Rockbond's Monthly e-Newsletter for the latest news, products, and projects.