32 | TW Civil & Infrastructure T T Kim Newth Complex wastewater project a winner “Knowing that we have helped to boost the resilience of the local wastewater network is very rewarding – this has been an awesome job for our team.” REGIONAL DEVELOPMENT It was an exciting night for TW Civil & Infrastructure at last November’s Civil Contractors New Zealand Hawke’s Bay East Coast Awards, where the team took out the top award for projects with a value of more than $3 million. The judges congratulated TW Civil & Infrastructure on their excellent work delivering a high-profile and challenging pipelines project in Hastings. It involved installing a 1.6km wastewater pipeline through suburban streets, as part of the district’s Eastern Interceptor Project. “I’m extremely proud of our team,” says project manager Campbell Young, who brings 10 years’ industry experience to his role. “We were up against some pretty strong competition on the night, so this is a really awesome achievement.” Founded in 2022, TW Civil & Infrastructure has rapidly grown its reputation as a onestop construction specialist, with local teams serving local communities across the North Island. TW Civil & Infrastructure is part of TW Group, one of the only vertically integrated property development, civil, construction and trade companies in New Zealand. ‘Built on agility and powered by teamwork’, TW Civil & Infrastructure has all the in-house expertise needed for successful project delivery. Hastings District has an ongoing programme to upgrade ageing pipelines to safeguard the resilience of the district’s wastewater network. The award-winning Eastern Interceptor Project, which is part of that programme, involved upgrading pipelines down Collinge and Willowpark roads in Hastings. Both are busy suburban roads, particularly Willowpark Rd. TW Civil & Infrastructure worked closely with TW Traffic Management to ensure the safety of both site workers and the travelling public. At the time of tender, both teams came together to plan out how the two-year-long project would be delivered and managed. “For example, we had to go through a roundabout at Grove Rd and Willowpark Rd that involved strategic planning to do the work in two halves, and with temporary works in place to keep the traffic flowing. A lot of care was taken to keep local residents informed about what was happening. There are a lot of moving parts in a project like this, so having good communication and teamwork is just so important,” says Campbell. “The pipeline also goes past a local school on Willowpark Rd. We informed the school well in advance about what we’d be doing. While the works were underway there, we had a temporary pedestrian crossing in place, and brought in a dedicated traffic team member to ensure students could cross safely. A separate gate entrance to the school was also used to reduce the amount of traffic through the site.” Trench shields were used throughout the whole process to maintain site safety for workers. Each section of heavy glass-reinforced plastic pipe was lifted into place using an excavator. Connecting new pipeline into a live discharge chamber, while managing existing flow, was another complex challenge for the team, requiring meticulous forward planning to ensure smooth delivery on site. At the start of the project, the team was also working at considerable depth – up to 3.5m – in saturated ground conditions. A well-point dewatering system was used as a cost-effective de-watering solution. The innovative technique assists in lowering groundwater levels to create a stable, dry working environment. This was Campbell’s first major project with TW Civil & Infrastructure, and he is proud that everything was built to contract deadlines, particularly given that the start of works was temporarily delayed by the team assisting with clean-up efforts after Cyclone Gabrielle. “Knowing that we have helped to boost the resilience of the local wastewater network is very rewarding – this has been an awesome job for our team.”
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