Capability Statement

We used the optimum mix of tunnelling and trenched construction techniques to deliver the Barber Grove to Seaview Wastewater Treatment Plant Pipe Duplication Project for Wellington Water, causing the least impact possible.

The project involved the installation of a new 1.2 km long, 1 m diameter pressurised wastewater pipeline. It services 90% of the residents in Hutt Valley, improving water quality and catering to the region’s growth.

In Gisborne, on the east coast of New Zealand’s North Island, we upgraded a wastewater treatment plant, doubling its existing capacity while saving our customer 30% in construction costs.

The budget for the Gisborne Wastewater Treatment Plant Upgrade – Stages One & Two was tight, but we love a value-engineering challenge! Working with the Gisborne District Council, the team rescoped and redesigned the construction method, reducing the cost by 30% and reducing the carbon footprint of the job.

In joint venture, we delivered an additional Biological Nutrient Removal (BNR) facility for Watercare, streamlining the programme and providing alternate solutions that reduced the cost of this complex brownfield project. The facilty provides additional secondary treatment capacity for approximately 250,000 people.

The project, which was part of Watercare's expansion of their Māngere Resource Recovery Facility (MRRF) in Auckland, won a IPWEA 'Best Public Works Project' award.

The Digester 8 Tank is one of eight mesophilic anaerobic digester tanks at the plant where wastewater is stored. Bacteria break down the organic matter inside this pressure vessel as part of the wastewater treatment process. The project's scope of work includes:

The aim is to improve and extend the digester's working life, which, when regularly maintained, can last up to 50 years.

We delivered this state-of-the-art wastewater treatment plant upgrade in Auckland, drawing on our learnings from past projects to value-engineer the design and fast-track the programme. We delivered the project on time and within budget, all while keeping the existing plant fully operational.

We were engaged (in joint venture) by Watercare to upgrade the Pukekohe Wastewater Treatment Plant to support population growth in Franklin, and improve the quality of the water discharged into the Waikato River.

For the first time in New Zealand, a Direct Pipe® micro-Tunnel Boring Machine (mTBM) and traditional pipe jacking methods were used to install Glass Reinforced Plastic (GRP) pipes in a single drive.

We utilised two different tunnelling systems, doubling down on innovation to install a new pipeline for the Queen Street Wastewater Diversion Project in Auckland, New Zealand. On the project, we managed the tunnelling scope for lead contractor Fulton Hogan and client Watercare to construct a 570-metre-long wastewater pipeline in the city centre under Queen Street.

Protecting the environment and minimising disruption to existing operations were key to securing the second stage of the Shotover Wastewater Treatment Plant Upgrade in picturesque Queenstown.

Our project was the third (and final stage) of Queenstown Lakes District Council’s 20-year-long programme to transition the plant from the traditional Biological and Aerated Pond Treatment processes to the more effective and efficient ‘Activated Sludge Treatment’ method.

Proposing a trenchless solution to minimise disruption, Watercare Services awarded us the Snells Algies wastewater pipe and outfall construction project. It resulted in new world record - a 2021 metre long Direct Pipe® drive delivered using a micro tunnel boring machine.

The project was the first phase of a three-phased scheme to improve water quality in the Mahurangi Harbour and cater for population growth in the Warkworth and Mahurangi East communities north of Auckland.

Limiting our construction footprint was a key part of our delivery approach for the St Marys Bay Area Water Quality Improvement Project in Auckland.

Now complete, this Auckland Council Healthy Waters project reduces the frequency of releases of stormwater overflow into the Waitematā Harbour by 95%. It provides storage in the form of a 1.8 m diameter, 2 km long underground pipeline, and a new 450 m long ocean outfall. Stored water is pumped back into the sewer network when there is capacity. Discharged water is released far away from places where people swim.

Using an innovative caisson (sunk shaft) construction method, we designed and delivered the Warkworth Pump Station, part of Watercare's broader scheme to improve the wastewater network from Warkworth to Snells Beach.

We built the new 247 litre per second wet-well / dry-well pump station adjacent to an existing pump station in Lucy Moore Memorial Park, implementing construction strategies and approaches to protect the sensitive park and river environment.

Through our local office, we've been working with Dunedin City Council to successfully deliver 'three waters' (wastewater, stormwater, and drinking water) upgrades.

As a member of the Council's works panel, we are one of a small number of organisations upgrading the city’s water and wastewater treatment plants through to 2031.

Drawing on our industry-leading trenchless construction experience, we delivered the Warkworth to Snells Transfer Pipeline for Watercare, continuing our strong relationship with them.

The project was part of Watercare's North-East Wastewater Servicing Scheme, which conveyed wastewater from Warkworth to Snells Beach. The scheme will cater for future growth and enable Watercare to decommission the existing Warkworth Wastewater Treatment Plant, which discharges into the Mahurangi River.