This project saw Vitruvius lead the investigation and renewal of drainage and tunnel infrastructure through one of New Zealand’s longest rail tunnels (8.6 km).
Vitruvius also developed and delivered the tunnel’s Asset Management Strategy, providing KiwiRail with a clear framework to achieve both short‑ and long‑term objectives and to sustainably manage this critical asset within the rail network. The tunnel forms a vital link between the West Coast and Canterbury.
Vitruvius project managed the early upgrade phases, which included comprehensive tunnel cleaning and drainage upgrades, incorporating in‑line treatment prior to discharge into sensitive downstream river environments. In addition to delivering the completed works, Vitruvius provided advisory services including procurement advice, investigations, and scoping to inform the next phase of track infrastructure renewal.
The project was successfully delivered, strengthening the tunnel’s performance, environmental outcomes, and long‑term resilience.
Project: Otira Tunnel, South Island
Client: KiwiRail
When: 2012 – 2019
Vitruvius Scope: Project Management and Delivery, Surveying Services
