HMAS Stirling is the Royal Australian Navy’s primary base on the west coast and is located on Garden Island, 5km off the WA coast.


The 305m low-level bridge is located at the mainland end of the causeway which links the island to Point Peron.

The bridge comprises a reinforced concrete deck supported by a steel structure on steel piles, providing a two-lane roadway. The abutments are reinforced concrete and steel sheet piling. There have been various repair works conducted since its commission in 1972, including most recently in 2007/2008.

Duratec was engaged to perform repairs due to the accelerated deterioration of the structural steel under the bridge deck.

The scope of works included repairs to:

  • Structural steel supporting the deck (beams and piles).
  • Steel sheet piling.
  • Reinforced concrete abutments including cathodic protection.
  • Reinforced concrete deck soffits.
  • Reinforced concrete deck edges.
  • Guardrails.
  • Expansion joints at abutments and bents.


  • Duratec developed an adjustable access system to allow for changes in the water level caused by tidal and climatic fluctuations.
  • The works were carried out in part of the Cockburn Sound Marine Park. Duratec’s strong environmental management systems and controls ensured minimum impact on the environment.


  • Concrete Repair
  • High Performance Coatings
  • Bridge Maintenance

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