Category: Industry

CODA recently participated in a site visit to the Harriet Alpha assets following their arrival at the Australian Marine Complex (AMC) in Henderson, providing an opportunity to observe progress on the offshore removal and onshore dismantling phases of the project.

The visit brought together representatives from CODA, Santos, Liberty Industrial, McDermott, and the Department of Energy and Economic Diversification. Attendees were provided with a detailed walkthrough of the offshore removal and onshore dismantling workflow, including load-in operations and the transfer of large structural components from barge to self-propelled modular transporters (SPMTs) for positioning within the laydown area.

Harriet Alpha, installed in 1985 and ceasing production in 2013, was a pioneering development in Western Australia’s offshore oil and gas industry and forms part of a broader decommissioning program across the region. Liberty Industrial was engaged by Santos to undertake a deconstruction and disposal study for the Harriet Alpha platform. Following the award of the engineering, procurement, removal and disposal (EPRD) scope to McDermott in 2024, Liberty Industrial partnered with McDermott in 2025 to deliver the safe receival, demolition, recycling and disposal activities of the retired platform, including the helideck, topsides, jacket and associated equipment.

With major components including the jacket, topsides and the “Pancake 4” section weighing approximately 1,480 tonnes, 1,440 tonnes and 185 tonnes respectively, the project achieved multiple milestones, including being the largest offshore platform removed from Australian waters at the time.

The Harriet Alpha decommissioning scope represents a significant example of the growing capability of the Australian offshore decommissioning sector. It sets a new benchmark for scale and execution, and reflects the progression toward a growing number of large-scale decommissioning programs across the industry.

CODA acknowledges and congratulates all project teams involved in delivering this stage of the work.

The Department of Industry Science and Resources has released a request for tender (RFT) on AusTender for a lead contractor to deliver phase 2 of the program.

Submissions close 1 December.

Phase 2 of the Northern Endeavour decommissioning program includes permanently plugging and abandoning 9 wells in the Laminaria and Corallina oil fields.

The Department is seeking proposals from organisations to complete phase 2 in 2 stages.

Stage 1

Project management, engineering, logistics, regulatory approval (including achieving Registered Operator status), subcontracting and procurement activities to:

• Design and plan to permanently plug and abandon the wells.
• Develop a Stage Gate Review Pack outlining a pricing model with detailed budget, risk profile and Performance Management Framework.
• Achieve Registered Operator status and monitor and maintain the Laminaria Corallina oil fields.

Stage 2

Includes:

• Permanently plugging and abandoning the wells.
• Project management, engineering, procurement and field monitoring.
• Meeting all regulatory requirements, including a National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA) approved Safety Case.

You must complete all work in line with the priorities of the project. In order of importance, the priorities include:

• Achieving outstanding safety, health and environmental performance.
• Achieving quality outcomes through good industry practice and standards.
• Effectively managing risk and change.
• Complying with all regulatory requirements and timeframes.
• Achieving a technically compliant solution that balances compliance with value for money.
• Aligning delivery with environmental, social and governance expectations.

Interested parties must:

• Register to submit proposals through the AusTender website.
• Address all requirements in the RFT or we may exclude your proposal from evaluation.

The Department will hold 4 industry briefing sessions for interested parties. Each briefing will cover a different topic including commercial, technical, regulatory and financial aspects of the RFT.

The Department will hold the briefings during the week of 22–26 September 2025.

To register for the briefings, please email the contact officer at LamCorProcurement@industry.gov.au and include:

• Your company name.
• The name of the attendees and which briefing they will be attending.
• The email addresses of all attendees.
• Confirmation that attendees have read and understood the briefing protocols including in the RFT documents.

You can read more about decommissioning the Northern Endeavour on the Department of Industry, Science and Resources’ website.