Great Lakes Shire Council v Dederer

The case of Great Lakes Shire Council v Dederer concerned a negligence claim brought by a young man who sustained severe injuries, including paraplegia, after diving off a bridge. The plaintiff sued both the Great Lakes Shire Council, as the responsible road authority, and the Roads and Traffic Authority (RTA), the successor to the body that designed and built the bridge. The dispute centred on whether these authorities owed a duty of care to the plaintiff and whether they breached that duty, leading to his injuries. The matter was heard in the Court of Appeal of New South Wales.

The legal issues before the court included whether the Council, as the road authority, owed a duty of care to the plaintiff regarding the safety of the bridge and its surrounds, particularly given the known propensity for people to dive from it. The court also had to consider the RTA's duty of care arising from its predecessor's design and construction of the bridge, including whether the RTA had sufficient knowledge of the dangers and the ineffectiveness of existing signage prohibiting diving. Furthermore, the court was required to determine the application of the obviousness of the risk defence under section 5F of the Civil Liability Act 2001 (NSW), the issue of causation, and the extent of any contributory negligence by the plaintiff. The justifiability of policy decisions made by statutory authorities in the context of negligence claims, including considerations of resource availability and competing priorities, was also a significant aspect of the appeal.

The Court of Appeal's reasoning involved a detailed examination of the duties owed by statutory authorities and the principles of negligence. The court considered the plaintiff's age and experience, his knowledge of the estuary's tidal conditions and the potential for shallowing water, and his observations of others diving from the bridge. The court also assessed the adequacy of the warning signs and the feasibility of modifying the bridge to deter diving. Ultimately, the court found that while the RTA had some responsibility, the Council's appeal was upheld, and the original judgment against it was set aside. The RTA's appeal was partially upheld, with the apportionment of damages significantly altered.