11 Oct 2023

Auckland sinkhole: What's the fix and long-term damage?

From Nine To Noon, 9:05 am on 11 October 2023
Sinkhole in Parnell

Sinkhole in Parnell Photo: Watercare

It's being called Auckland's worst pollution event in nearly 50 years. 

It's two weeks since a massive sewer line collapsed in Auckland, leaving hundreds of litres of human waste pouring into the inner harbour every second.

Kathryn is joined by Watercare's head of service delivery Sharon Danks to talk about the bypass solution that could be in place in a week - will be a complete fix to the sewage overflow?

Also marine scientist Dr Andrew Jeffs from Auckland University on the long term damage being done to the environment and how long it'll take before water quality improves.

The diagram below shows the impact of the sinkhole on the Ōrākei main sewer. Watercare crews are working around the clock using hydro-excavation (jetting water) and a vacuum sucker truck to remove debris from the blockage inside the sewer. By midday Friday 29 September, they had completed excavation around the top of the sinkhole to make it safe. They will be spraying concrete like product on the slope to prevent more material falling in.

The impact of the Parnell sinkhole on the Ōrākei main sewer. Photo: Watercare