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Videos about the Central Interceptor project

<- Homepage: Central Interceptor: the largest ever wastewater project in Aotearoa field trip

Introducing Central Interceptor

LEARNZ kaiārahi Andrew introduces the Central Interceptor online field trip.

Central Interceptor project overview

Executive Programme Director Shayne Cunis gives a rundown of what the Central Interceptor project is all about!

  1. What percentage of Auckland's wastewater is treated at the Māngere Wastewater Treatment plant?
  2. What is the problem with Auckland's old "combined sewerage system"?
  3. What is the Central Interceptor for?

Central Interceptor site activities

The Māngere Pump Station site is where wastewater from the Central Interceptor will be transferred to the Māngere Wastewater Treatment Plant. One of the key activities at this site has been digging some rather large holes in the ground.

  1. How big are the holes?
  2. Why are the holes there?
  3. How big is the tunnel?

Increasing sustainability on site

Sustainability is all about looking after our earth and communities so that future generations can enjoy them too. Sustainability lead, Oliva, takes us on a quick tour of the Māngere Puimp station site to show some of the actions being taken to ensure this project is reducing its impact on the environment.

  1. What are some of the ways this project is showing sustainability?
  2. What are some ways that you are practicing sustainability at school or at home?
  3. What new ideas do you have about how you could improve sustainability action either at school or at home?

Health, safety, and wellness on site

Health and safety is a major part of every decision and action on a construction project like Central Interceptor. Find out more about the health and safety training facility and how the idea of wellbeing also fits into this space.

  1. What sorts of things might new workers learn on the 2-day health and safety induction?
  2. What is 'Mates in Construction' about?
  3. What are some health, safety, and wellness tools that you have at school?


Venture down the inlet shaft and along the Central Interceptor wastewater tunnel that has been excavated so far. Here you will meet Hiwa-i-te-Rangi, the tunnel boring machine!

  1. What is the depth and distance of the TBM's current position?
  2. What are the 3 main jobs of the TBM?
  3. What speed does the the TBM travel?
  4. Find out more about the 'Archimedes screw'.

Restoring Puketutu Island

Discover how Watercare is rehabilitating Puketutu Island and what it will eventually become. Get a look at some of the interesting items that were found when excavating the tunnel shaft.

  1. About how much spoil will be transported to Puketutu from the tunneling operation?
  2. What is being done with the island and what will it eventually become?
  3. How old are the shells that were found during excavation of the tunnel shaft?

Restoring the environment

One of the 16 construction sites along the tunnel route is in a place called Norwood Reserve. The CI environmental team aim to minimise disruption to the surrounding neighbourhood and restore this unique, natural habitat.

  1. What are the three "rules" that the environmental team focus on?
  2. What jobs are being done to help the lava rock forest?
  3. Look for some restoration projects to get involved in near your place.

Māngere Wastewater Treatment Plant

When the Central Interceptor is up and running, all the wastewater collected in this tunnel will be pumped to the Māngere Wastewater Treatment Plant. How does the wastewater treatment process work so that treated water is safe to be let out to sea?

  1. The waste of how many people is being treated here?
  2. How long is the treatment process?
  3. What is used instead of chemicals to treat the wastewater?

Healthy water, healthy people

Watercare Pou Hononga Otene discusses the value of water to Māori and why the CI project is so important.

  1. What are some of the key reasons water is so valuable to Māori?
  2. "Ko wai koe?" means "who are you?" What is the literal translation of this question?
  3. Explore your own connection with water and waterways.