Tag: Mangere

Waste Water Furore

Legit Concern


NIMBYism Striking Back


I noticed this cropped up in the Manukau Courier this morning via the Stuff Website:

‘Don’t dump it here’

Plans to release much of Auckland‘s wastewater into the Manukau Harbour have met a storm of opposition from waterfront residents.

Watercare has received 468 submissions from Mangere Bridge people and groups ahead of public hearings on its “central interceptor” project.


The feedback makes up the bulk of the 752 submissions on the project’s resource consent applications.


The interceptor, a 13km underground tunnel, will take up to two million cubic metres of sewage and stormwater to the Mangere treatment plant every year.


It will also include 6km of linking sewers and create a long-term replacement for an ageing 7km tunnel section – the Manukau Siphon – near the plant.


The $800 million proposal aims to improve the water quality of the Waitemata Harbour and reduce or eliminate 122 flooding spots, mostly in Avondale, Western Springs and Mt Albert.


But Mangere Bridge residents say those improvements will come at a cost to the environment.


Many of their submissions were completed on forms distributed throughout the community by the Mangere Bridge Residents and Ratepayers Association.

The form says the proposal could have dire effects for the water quality of the harbour and birds roosting in the area.

“It is not good ecological practice to transfer large amounts of water from its natural catchments to a shallow enclosed harbour with finite capacity to receive it,” the form says.


Te Akitai Waiohua Waka Taua Trust, which is associated with Pukaki Marae, has also lodged numerous submissions against the proposal.


The trust says there has been insufficient consultation with tangata whenua regarding stormwater discharge, air discharge, earthworks and coastal structures.


But Watercare chief executive Mark Ford says his organisation has a “strong record” of community consultation on major projects such as this one.


I’ll take the word of Mark Ford over the Trust and Resident’s Ratepayer’s Association on reflection of consultation “issues” with Maori Trusts, and Resident and Ratepayers Associations pigeon holing debates/feedback with Pro-Forma forms as seen in the Unitary Plan debate.

But my question to the objectors is: Where is all the waste going to go for treatment?

  • We have an extra million people and subsequent urban development to support it on its way.
  • Our waste water infrastructure needs upgrading including expanding the Mangere Waste Water Plant.
  • There will be later on a second treatment plant in Drury with an outfall again in the Manukau Harbour to deal with waste water in the Southern Rural Urban Boundary area.
  • We have to stop the overflow of the sewerage pipes in the isthmus area spilling untreated sewerage into harbours.
  • Some waste water is being diverted to the North Shore plant for treatment.
  • And the Mangere Plant is state of the art with its Bio Reactors that are extremely efficient in treating our waste water which will be expanded

The simple answer is the waste-water is best suited to Mangere at this point in time along with other current and proposal plants. There is simply no where else to dump treated waste-water from the advanced plant that will have minimal effects on the actual physical environment.

From the article again

The central interceptor proposal reflects international best practice and will save Auckland more than $500m going forward, Mr Ford says.


Major upgrades are also being planned for the Mangere treatment plant to address Auckland’s wastewater needs.


“These will ensure continued protection of the Manukau Harbour and enable the Mangere wastewater treatment plant to continue to operate within its current discharge loads into the future.”


Watercare also intends to divert the wastewater flows of about 75,000 existing households from Mangere to a plant in Rosedale by constructing another tunnel from west Auckland to the North Shore.



Unless you want the open oxidation ponds and sludge lagoon again as a method of treating our crap I’d suggest you let Watercare carry on unimpeded.