Report - Woodside Monthly Recordable Environment Incident Notification - 2025-03-30_Redacted

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Woodside Energy (Victoria) Pty Ltd's March 2025 monthly recordable environment incident notification, submitted under the Minerva Decommissioning and Field Management Environment Plan, concerns decommissioning of the Minerva Pipeline (VIC/L22, Pipeline Licence VIC-PL33) in Commonwealth Waters by the vessel Seven Sisters. Piggyback clamps, which had reached the end of their 20-year design life, broke apart when stored energy in the injection line and umbilical was released during hydraulic shear cutting. Woodside estimates about 150 components, roughly 65 kg of polypropylene, were lost between 4 and 31 March 2025, breaching performance standard PS 9.2 on debris over 300 mm. Responses include halting operations, a targeted coastal survey on 10 April, hydrodynamic drift modelling, a revised cutting methodology, and an environmental risk assessment that Woodside says shows risks are reduced to ALARP. The document contains no NOPSEMA assessment or enforcement decision.