United Tunneling was engaged to complete a trenchless sewer installation in Taranaki, delivering works beneath State Highway 3 and tying into an existing stormwater box culvert.
The project involved installing 54 metres of 150mm PVC restrained sewer pipe at a depth of 10 metres, using microtunneling methods to maintain accuracy and minimise disruption to the busy highway above.
The alignment required careful control to ensure a precise connection into the existing stormwater infrastructure on exit, integrating new services with existing assets without the need for open excavation on the surface.
This type of work highlights the value of microtunneling in urban and transport corridors — delivering precise underground connections while keeping critical infrastructure operating above ground.
Project highlights
Project: Taranaki Sewer upgrade
Location: State Highway 3
Method: Microtunneling
Length: 54m
Pipe Size: 150mm PVC restrained sewer pipe
Depth: 10m
Connection: Existing stormwater box culvert
Environment: Live highway crossing
Need a trenchless sewer solution under roads or existing infrastructure?
Talk to the United Tunneling team about the right approach for your next project.
