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Auckland Transport

Beach Road retaining wall rebuild, Castor Bay Beach Road retaining wall rebuild, Castor Bay

This project is to replace the palisade seawall alongside Beach Road at Castor Bay, between the Commander Parry Road and Rahopara Street.


Project status: Construction
Project zone: North


Project overview

The project involves replacing the existing wall, which is approaching the end of it design life. It was designed and installed many years ago when the North Shore and its traffic volumes were much smaller.

Its replacement is routine renewal and future proofing of infrastructure to ensure that it performs for many more decades with greater traffic volumes, heavier vehicles and more demanding weather because of climate change.

Auckland Transport will also take the opportunity to upgrade the seaward footpath from its current 1.5 metres to 1.8 metres wide. This will be cantilevered from the road bridge.

Timeline

  • The project construction started on 7 January 2019.
  • The aim is for the construction to be completed at the end of March 2019 (depending on weather and unforeseen issues). 
  • Work hours will be 7am to 7pm on the weekdays and between 7am to 3pm on Saturdays.

Project details

Methodology

The new installation is a palisade friction pile wall made up of a series of eight to nine-metre-long concrete piles drilled side-by-side into the ground. There will be no pile driving and therefore, no vibration and little noise to disrupt nearby households. This involves the use of a relatively new technology known as a mini piling rig which can operate in confined spaces.

Road closures and traffic management

This will require the seaward lane of Beach Road to be closed between Commander Parry Road and Rahopara Street for the duration of the works. While this will cause inconvenience contractors will provide traffic managers during the day and temporary traffic lights at night to manage traffic flows with the least possible disruption.

Priority will be given to Takapuna/city bound traffic in the mornings and to traffic travelling to the Bays in the evenings. At other times the traffic will be managed according to the actual demand at any given time.

Nevertheless, we recommend that you avoid using the road at peak traffic times (between 7am to 10am and 4pm to 7pm) if at all possible by either amending your own travel times and/or by taking alternative routes.

Phases of work

Phase one

  • Move ground-level gas and water mains and overhead power lines. Please note that Vector has no plans for under-grounding the power lines.

Phase two

  • Installing piles to form the palisade retaining wall.
  • Build new 1.8 metre seaward-side footpath.

Phase three

  • Reopening the road and completing the finishing works including restoration of utilities gas, water and power.

For more information on this project

Contact Auckland Transport