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Project introduction

We’re building a new bridge over the Mangawhero Stream and realigning State Highway 27 to make this stretch of highway safer.

  • Estimated project cost

    $12 million
  • Project type

    Safety improvements
  • Project status

    Construction

Project updates

Project background

The Mangawhero Stream Bridge on State Highway 27 was identified as part of the State Highway network that needed to be made safer due to a poor crash record.

The high crash rate is mainly due to the narrowness of the bridge and the unexpected dips and horizontal curves in the road leading up to it. Heavy vehicles find it difficult to traverse the bridge safely when there is oncoming traffic. As well as being safer the new bridge will be capable of taking modern heavier trucks, known as high productivity motor vehicles (HPMV).

Construction of a new bridge to the east of the existing one and realigning SH27 started in March 2021. As most of the work will take place away from the existing highway, the impact on SH27 traffic will generally be minimal. Traffic management will be necessary to safely allow construction traffic to access the site and when the new alignment is connected to the existing highway at each end.

As part of this project we will put in place some erosion protection along the meandering Mangawhero Stream to ensure that it does not impact on the new bridge.

The new bridge and road alignment are expected to be complete in mid-2023.