Brooking Channel Bridge Replacement

Project Overview

The existing Brooking Channel Bridge structure was a single lane bridge and the team is currently replacing it with a dual lane bridge to improve the region’s supply chain resilience, enhance road safety, and provide ongoing employment opportunities for the Fitzroy Valley region.

The Fitzroy Bridge Alliance, working in partnership with Main Roads Western Australia, replaced the Brooking Channel Bridge and engaged Fortec to provide their specialist Incremental bridge launching expertise for the construction of the new bridge, following on from the successful completion of the new Fitzroy River Bridge in 2023.

The new bridge was constructed using the Incrementally Launched Method of bridge construction and the superstructure consisted of a composite steel girder with reinforced concrete deck bridge with typically 35.3m spans.

The piers were constructed using precast concrete external shells with insitu reinforced concrete poured inside. The piers were founded on reinforced concrete bored piles. The construction method and design were optimised to minimise the construction time of this important piece of road infrastructure.

Check out the impressive installation of the 127 metre-long deck in the video link below, originally posted on YouTube by Main Roads Western Australia.

https://www.youtube.com/watch?v=UhqolQRj5wY

Fast Facts

  • CLIENTFitzroy Bridge Alliance
  • LOCATIONFitzroy Valley, WA
  • YEAR OF COMPLETION2024

Scope of Works

The scope includes:

  • Design of site-specific launching services including temporary works
  • Technical advice on bridge launching
  • Supply and design of launching equipment including launch bearings, side guides, launching jacks and pulling cables and nose deflection jacks
  • Supply of on-site launching services including launching technicians and engineering support
  • Jacking system for change out of temporary launch bearings for permanent bearings

Key Points of Interest

  • Piling commenced in early June 2024 and with the construction of abutments and Piers and a 130m long casting bed on the west side for the complete prefabrication of the 4 span bridge deck including steel girders and insitu concrete deck
  • The bridge was launched in early September 2024

Highlights

  • The bridge launch was completed ahead of schedule with up to 35m being launched in one day and 130m of bridge over 1.5 weeks to allow for some adjustments to the temporary launch over permanent bearings