Moa Point wastewater treatment plant inlet pump station refurbishment
We're refurbishing the inlet pump station at the Moa Point wastewater treatment plant on behalf of Wellington City Council. This will increase its resilience and reduce the risk of discharges improving environmental and public health outcomes.
If you have any questions about this work, please contact:
Wellington Water, 04 912 4400
Latest Updates
We are delighted to inform that the 4 pumps were successfully reinstalled this week and the wet well was back brought back online from Tuesday - 3 days ahead of schedule!
Last week’s work to fix the wall brackets and anchors was successful and we are pleased to report the riser pipes are now fixed in their positions, ready to be connected to their individual pumps.
Works are progressing well at the inlet pump station with the 4 riser pipes now in position.
Works on the first phase of the refurbishment to replace four of the 10 riser pipes in the IPS are now complete. The next phase of work to install 2 new riser pipes in the adjacent wet well is expected to begin in late March 2024.
Please see the Updates tab for more detailed information on the progress of the works.
This project is not associated with current works underway at the treatment plant constructing the new Sludge Minimisation Facility (SMF).
Why is this work needed?
Some of the electromechanical parts, pipework and pipe fittings at the inlet pump station are reaching the end of their design life.
The refurbishment programme will replace and repair these parts, increasing the resilience of the pump station and improving environmental and health outcomes by reducing the risk and frequency of discharges through the short outfall into the environment.
Veolia, as operator of the Moa Point wastewater treatment plant, will undertake the works which are being done in several phases.
What's involved?
The first phase of the refurbishment programme involves replacing four of the 10 risers at the pump station to help address the immediate risk of discharges to the environment while the rest of the refurbishment project is completed.
Works on this first phase started in early October 2023 and are expected to be completed by 24 November - subject to any wet weather.
The long-term plan is to replace all 10 risers and pumps n a phased programme that will restore the plant’s design pumping capacity of 4,000 litres per second. The programme is expected to take between 12 and 18 months to complete.
This work requires careful planning and execution as the riser pipes are large and heavy, requiring specialist lifting equipment and personnel to complete the work whilst operating in a hazardous environment.
We are still finalising the next phase of works, but it is broadly planned to commence in early 2024. It will be undertaken in conjunction with other planned work at the plant to minimise disruption to operations.
We will provide updates as soon as we have finalised the work programme.
All Updates
We are delighted to inform that the 4 pumps were successfully reinstalled this week and the wet well was back brought back online from Tuesday - 3 days ahead of schedule!
Veolia have been monitoring the pumps performance closely over the last few days to make sure the desired performance, from both the pipes and pumps, is being achieved.
The next phase of works for Inlet Pumping Station will be to install 2 new riser pipes, just like the 4 installed this month, in the adjacent wet well. These works are expected to begin late March next year.
Last week’s work to fix the wall brackets and anchors was successful and we are pleased to report the riser pipes are now fixed in their positions, ready to be connected to their individual pumps.
The scaffolding within the wet well has been removed and the contractor brought in to install the riser pipes has now demobilized from site.
This week Veolia began the process of reinstalling the 4 pumps and this is expected to be finished by the end of the week.
We will provide another update next week and confirm the status of the project.
Works are progressing well at the inlet pump station with the 4 riser pipes now in position.
This week will see the installation of the wall brackets and anchors to keep the pipes fixed in their position as well as some minor grouting within the wet well.
Assuming this work goes to plan, we plan on lifting the 4 pumps back into their original positions the following week.
We will provide a further update when this week’s work has been completed.
