Te Maunga Wastewater Treatment Plant – Final Effluent Line and Bypass Pipeline

Deliver, but don’t disrupt. A complex challenge.

When asked to install a new effluent pipeline for the Te Maunga Wastewater Treatment plant, we were tasked with completing the project with zero disruption – the effluent line could not be shut down under any circumstances. All cutovers or connections needed to be completed within very short timeframes under technical overpumping operations.

We worked closely with Tauranga City Council to achieve this challenge, suggesting more cost-effective options, and drawing on our knowledge and experience of the local area to complete the project with zero disruption or incident.

Our work

Installation of 1,200 metres of new PE pipeline.

Removal and disposal of 250 metres of RCRRJ pipe.

Removal and disposal of 400 metres of asbestos cement pipe.

Construction of approximately 400 metres of timber retaining wall.

Services location and relocation into a common services trench, including around 1,200 metres of 11 kV cable and other utility services.

Reinstatement of the road, including pavement construction, kerb and channel, and surfacing (AC and chipseal).

Council project manager commented that the project team and delivery “felt like a partnership”.

Sustainable Outcomes

This project was an excellent example of collaborative work and a focus on the value of people.

We partnered very closely with the client to gain a good understanding of their network, stakeholders and budget requirements, plus the risks involved. This helped us refine our methodology and implement a programme which minimised all disruption – and saved ratepayers money. For example, we adjusted plans from the original documentation to lessen our impact on nearby sand dunes, and reduce the time neighbourhood structures and the existing outfall pipeline were exposed to settlement risk – which also shrunk noise and vibration impacts as well.

While we brought with us to this project a vast amount of experience, we also strived to ensure HEB team members found an opportunity to develop themselves on the job. Our people are our business, and we’re always working hard to build long-lasting careers. Several of our crew achieved CCNZ Civil Trade Certification during the course of this project.