Results
Maintenance and protection works completed safely in a challenging tidal environment.
Enhanced structural durability with long-life replacement components.
Environmental protection achieved through careful methodology over tidal waters.
Long-term maintenance cost savings delivered through improved design solutions.
Project
Solution
Surface preparation and coating application to structural steel.
Removal and replacement of Denso corrosion systems and sea pile wraps.
Replacement of handrails, timber elements, corroded fasteners, and pile caps.
Rope access over water, supported by rescue vessel and IRATA Level 3 supervision.
Innovative fabrication and supply of replacement components with extended service life.
Project
Challenges
Working over tidal waters with a 5m tidal range impacting access and workflow.
Complex maintenance scope involving coatings, corrosion protection, and structural repairs.
Requirement for strict health, safety, and environmental controls.
Need to deliver long-term durability improvements without increasing initial costs.
Project
Overview
Queensland Alumina Ltd operates Australia’s largest alumina refinery in Gladstone, where four 8.5km-long pipelines carry residue to a disposal dam. At the South Trees tidal inlet crossing, maintenance works were required on the support structures, including coating, corrosion protection, and structural component replacement.
Works were delivered over tidal waters with challenging access, using a combination of commercial vessels, walkways, and rope access supported by a rescue vessel.