Capability Statement

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.

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.

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.

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.

Our in-house mechanical team delivering these works has extensive experience in asset renewal, planned maintenance, and fabrication. They are using advanced techniques such as LiDAR scanning, 3D modeling, and the creation of digital shop drawings to reduce site work and save time compared with traditional methods.

Regularly recording site conditions using drone-captured photogrammetry data has also enabled better tracking and more accurate progress payment claims.

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.

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.

We had an experienced tunnelling team ready to go, so we took on emergency work for Auckland Council Healthy Waters after major Auckland floods.

The Corban Reserve Stormwater Upgrade for Healthy Waters was still underway at the time of the flooding. Our team had just finished the 270 m long tunnelling drive at that job, so it was good timing and an easy transfer of skills, experience, materials, and equipment from the worksite out west to Greville Road for the Stormwater Culvert Upgrade.

We designed and constructed the final section of Auckland's biggest water pipeline project, re-routing the pipeline to minimise impacts, and completing New Zealand's longest ever pipe-jack.

The 32 km long Hūnua 4 project connects Watercare’s reservoirs in Manukau to central city water storage, improving the capacity and the resilience of the city's water network.

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.