The Lyttelton Harbour wastewater project kicked off in December 2018 and will connect the harbour’s wastewater to the main Christchurch system.
Lyttelton Harbour wastewater project completed in 2023, will end the routine discharge of treated wastewater into the harbour, an important environmental milestone for our city.
Over five kilometres of submarine pipeline will carry wastewater from Diamond Harbour and Governors Bay to Cashin Quay in Lyttelton, before being piped to the Simeon Quay pump station. From here, wastewater will be pumped through the Lyttelton tunnel and through the newly constructed 4.5-kilometre Heathcote Valley pipeline, to Bromley.
Key Information:
Project Size
- Converted three old wastewater treatment plants into pump stations; Otamuhua, Governors Bay and Cashin Quay.
- Built one new terminal pump station, Simeon Quay
- Installed numerous electrical controls and monitoring equipment to ensure the whole system runs smoothly and is continuously monitored by SCADA
- The Simeon pump station is the biggest able to pump 120 litres per second of wastewater uphill through the tunnel.
- 4.5 kilometres of new pipeline to a Pinch Valve Control Station and over five kilometres of submarine pipeline
Complexity Managed
The Lyttelton Harbour Wastewater Project is a very complex infrastructure project that we have been working on in stages since 2018. The size, complexity, managing many work fronts and delays proved a challenging project.
