What are we doing?

Three waters renewals

This is a package of work addressing known network problems within in each council area in the region.

This is generally because an asset has reached the end of its design life; such as pipes that are past their use-by date or have been given a low condition grade so are likely to not be functioning efficiently and may fail if not replaced.

With this work we are:

  • Trialing a faster, more efficient way of doing things and increasing the use of pipe lining (so we don’t need to dig trenches)
  • Reducing the risk of faults and failures by renewing or replacing pipes
  • Reducing the public health and environmental risks of wastewater network overflows

Most critical assets assessment

We have completed the first phase of assessing the current state of our most critical assets and follow-ups are now continuing.

Our most critical assets are the pipes, pump stations, reservoirs and treatment plants that we simply can’t afford to lose – the heart, kidneys and major arteries of the network. If they failed, there would be a major, unacceptable impact on the community and the environment.

This category includes about 450 kilometres of pipes, 79 pump stations, 139 reservoirs and water and wastewater treatment plants.

Pump station inspections like the one shown here are part of our most critical assets assessment.

VHCA PS Site photo 4

This is about 10 percent of all three waters assets. We are not ignoring the rest of our assets, but these are our priority for assessment and maintenance or renewal. While we already know a lot about some of these assets, and something about the rest of them, we have been drawing information together into a health assessment for each asset. A health assessment determines the following information

  • Future maintenance programmes
  • Future condition assessment programmes
  • An updated renewal programme
  • Risk analysis
  • Whether urgent repair or replacement works are required.

Where necessary, we have undertaken investigations to gather more information to inform the health assessments.

Pipe inspections

Pipe inspections have been undertaken across the region, focusing first on the oldest pipes, then the most critical. Health assessments are provided to councils as they are completed. 

Pump stations, reservoirs and treatment plants

We already hold a lot of information on the condition of these most critical assets. There are gaps in information on some pump stations and these have been inspected. Health assessments will be provided to councils as they are completed.

All this work is being delivered through the Very High Criticality Asset Health Assessment Project.