New Crossing with New Purpose:
Rust Avenue Bridge Replacement

In a bid to reduce flooding in extreme weather events, a Whangarei bridge that had stood strong since the 1930s was to be replaced. The original form of the bridge made it prone to blockage, creating a real risk of flooding for the CBD.

A replacement single span bridge solution was proposed and tenders for construction were called in early 2013. While all received tenders were significantly in excess of the available construction budget, the United Civil tender represented the best value proposition and the company was assigned preferred tenderer status.

Key features:

  • United Civil engineers worked with the client and the bridge designer to value engineer the design. As a result of this process, significant savings in the build cost were made to the extent that the project was able to proceed to construction.
  • Works included the demolition of the existing bridge, the construction of new abutments founded on driven piles, a new RC superstructure, along with realignment and reconstruction of the approach roads.
  • Other works included the construction of a temporary pedestrian footbridge, extensive services diversions, scour protection and the construction of RC pedestrian barriers.

Unlike the original structure, which was prone to blockage when debris washed down from upstream during periods of heavy rainfall, the new Rust Avenue bridge has succeeded in reducing the risk of flooding in the city’s CBD during extreme weather events.