The weather alerts issued by the EWN did not reliably reflect the data and frequency of ARTC’s extreme weather monitoring procedure or the service agreement. This and the services ARTC believed were included in the service agreement likely impacted the expectations of ARTC users who relied on these warnings to inform their response.
The ATSB is satisfied that the safety actions taken by both ARTC and EWN addresses the safety issue.
In August 2022, ARTC advised that they had undertaken a review of their contract with the EWN to address inconsistencies between ARTC's extreme weather monitoring procedure and contract.
Additionally, they clarified their requirements in relation to flood warnings with the EWN. Monitoring of rainfall depths for the Hunter Valley corridor had also been rectified and commenced.
In response to the draft report ARTC advised of the additional proactive safety actions:
The ATSB notes that ARTC have taken action to ensure that the weather monitoring service is aligned to their extreme weather monitoring procedure and have also introduced more proactive monitoring to manage the risk of flooding at special locations. The action taken by ARTC addresses the safety issue.
In response to the draft report the EWN advised that they had performed the following safety actions:
The ATSB notes that EWN have taken action to revise their weather monitoring system and services, which addresses the safety issue.