Western wastewater treatment plant outfall pipe renewal
On behalf of Wellington City Council, we are upgrading and realigning the outfall pipe at the treatment plant after it was damaged in a slip. This work will improve the resilience of the pipe .
If you have any questions about this work, please contact:
Wellington Water, 04 912 4400
The pipe renewal is now complete.
The outfall pipe at the Western wastewater treatment plant carries fully treated effluent out to Cook Strait.
In February 2022, it was damaged by a slip during a severe wet weather event. The pipe was was repaired, but was damaged again by a further slip during a subsequent wet weather event.
To address this and ensure the resilience of the pipe, work is now underway to stabilise the surrounding area and realign the pipe, including building a pipe bridge to further protect it from the risk of slips and damage from severe weather events.
Until this work is completed fully treated effluent is being discharged into Karori Stream, which is being continually monitored.