Decommissioning major hazard facilities presents complex challenges, from managing aging infrastructure to ensuring environmental protection and worker safety. As offshore and onshore structures reach the end of their operational life, effective planning and execution are crucial.
Tetra Tech Coffey is actively collaborating with governments, industry bodies, and commercial organizations to develop sustainable decommissioning roadmaps.
Major Challenges in Decommissioning
Cost and Logistical Complexities – The decommissioning process is unique for each project, with variations in infrastructure type, size, and condition. Australia’s offshore installations, often located in remote and harsh environments, add an additional layer of complexity. Logistics, worker safety, and efficient execution require detailed planning. Unlike other oil and gas activities, end-of-lifecycle decommissioning is still an evolving field in Australia. Established international decommissioning approaches may not always be suitable due to Australia’s distinct marine and terrestrial ecosystems.
Tetra Tech Coffey is working with clients and peak bodies like the Centre of Decommissioning Australia (CODA) to foster collaboration and establish industry best practices.
Managing Trailing Liability – Another key challenge is trailing liability, which ensures that decommissioning responsibilities remain with the asset’s original titleholder. This measure prevents companies from offloading aging infrastructure to third parties without assuming accountability. In the past, these liabilities were not considered when structures were built, but now they play a crucial role in ensuring safe and responsible decommissioning.
“Decommissioning is not just about removing infrastructure; it’s about ensuring long-term environmental and safety outcomes.” – Edward Rowley
Ensuring Worker Safety in Decommissioning – Worker safety is a primary concern in decommissioning, particularly given the extreme offshore conditions and the deteriorating state of aging assets. Hazards include chemical spills, hazardous materials, and biological threats, all of which can pose long-term health risks. Unfortunately, occupational hygiene (hazmat) considerations are sometimes overlooked, increasing potential risks to workers.
Tetra Tech Coffey maintains rigorous safety protocols to mitigate these risks. Employees undergo extensive work health and safety training, including PPE Fit Testing and emergency response courses. One essential program is the ‘Basic Offshore Safety Induction and Emergency Training’ (BOSIET) at the ERGT Safety Training Centre in Perth. This program includes simulated helicopter ditching training, preparing personnel for offshore emergencies.
“Safety is at the core of everything we do. Our teams undergo rigorous training to ensure they are prepared for any scenario.” – Edward Rowley
Leveraging Technology for Safer Decommissioning
Tetra Tech Coffey is at the forefront of integrating innovative technologies to enhance decommissioning safety and efficiency. By collaborating with its FusionMapTM team (part of Tetra Tech Delta), the company applies advanced analytics, spatial AI, and augmented reality to optimize project planning and execution.
FusionMapTM consolidates data from multiple sources into a single platform, enabling seamless access to critical information. Additionally, 3D modeling walkthroughs allow teams to explore project sites remotely, enhancing decision-making and risk assessment.
“Technology is transforming decommissioning. We are leveraging digital tools to improve safety, efficiency, and environmental outcomes.” – Edward Rowley
Sustainable Decommissioning Practices – Decommissioning does not always mean complete removal—repurposing infrastructure for renewable energy projects presents an opportunity to extend asset utility. Recycling materials is another focus, with innovative approaches such as repurposing PFAS firefighting foam for dust suppression in road construction. These circular economy initiatives reduce environmental impact and offset decommissioning costs.
However, reusing infrastructure comes with regulatory and technical hurdles. With a significant decommissioning portfolio ahead, Tetra Tech Coffey is committed to pioneering technology-driven solutions to improve outcomes across the industry.
“Repurposing infrastructure is an exciting opportunity. It requires careful planning, but the benefits are substantial.” – Edward Rowley
For more information, connect with Edward Rowley at edward.rowley@tetratech.com.
