Mairangi Bay Pump Station replacement project

We are building a replacement pump station to reduce wet-weather overflows, creating cleaner beaches and a better environment.

Start-finish: June 2021 - mid-2023
Location: End of Sidmouth Street and Montrose Terrace, Mairangi Bay
Status: Construction

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What’s happening now?

Pipeline and Civil have set up on site and started work diverting existing pipelines and cables in the road to make way for construction of underground storage. The road is closed at the beach end of Sidmouth Street while we undertake this work and begin construction of the shaft. You can view the progress so far on this 360-degree view from within the site here.
We are pausing construction during COVID-19 alert level 4 lockdown. We have made the site safe and secure in the hope that we can return to work as soon as possible. When we do, we will be continuing site preparation work such as continuing to divert the current wastewater pipes, while Vector will be diverting power cables around the site to allow for digging of the shaft which is currently planned for September. Any work delays due to COVID-19 may affect our ability to reopen part of the road to the beach for summer.
While there are currently no activities on site, you may notice our site security staff around. They are there to monitor safety and operations of the current pump station. We will be back at work (under strict operating protocols) during alert level 3.

We will continue to provide the community with updates as the project progresses. To receive those updates, you can sign up here.

Why is it needed?

Sidmouth Street Pump Station receives wastewater from properties between Long Bay and Castor Bay and pumps it over East Coast Road to the Rosedale Wastewater Treatment Plant for treatment.

Due to an increase in population and wastewater, the current wastewater pump station is struggling to cope, particularly during heavy rainfall when diluted wastewater can overflow up to 10 times per year, approximately 70 metres out to sea at engineered points on either end of Mairangi Bay.
In 2014, we began a project to look at the best option for a replacement pump station and to work with Auckland Council to integrate planning with the reserve management plan at Mairangi Bay. In 2015, we presented a concept to the public for a replacement pump station. Since then, we have been looking at the best way to integrate the pump station design with the reserve surroundings while minimising environmental impact.

What are the benefits?

The new pump station will include larger pumps and technology to cope with wet weather flows, virtually eliminating overflows. The benefits include:

  • Reduced wastewater overflows and improved beach water quality
  • Cater for population growth in the area
  • Improved open space and integration with the reserve
  • New building architecturally designed to improve the visual appearance of the reserve 
  • New technology to manage and treat odour helping to reduce the total site footprint
Mairangi Bay pump station events

Thanks for stopping by!

It was nice to see so many locals at our event on 22 May. We enjoyed talking with people and providing more information about construction. If you weren’t able to make it, keep an eye on this page as there may be more opportunities in the future. If you have any questions, please don’t hesitate to call us for a chat, or send us an email. You can also sign up for regular updates here.

Any questions?

If you have any questions about this project please contact:
Jennifer Charteris
Stakeholder engagement advisor
Phone: 021 979 803
Email: [email protected]

Newsletters and more information

Newsletter 2 project update May 2021
Newsletter 1 project overview April 2021
Media release August 2020