Catalina Boardwalk Remediation

Scope of works

The works included:

• Structural remediation included design, certification, supply, and installation of a new composite beam system to replace precast reinforced concrete beams (headstocks), conduct concrete repair and patchwork, remediate the timber section of the boardwalk, and supply and install bracing to the concrete piles.
• Supply and install new stainless-steel balustrades on the timber sections of the boardwalk, including the replacement of existing timber deck planks with new ones.
• Supply and install new stainless-steel balustrades on the concrete deck sections of the boardwalk from the northern timber deck to the central timber deck and from the central timber deck to the southern limit of work.

Working above water

Safety and environmental management were primary considerations due to the elevated nature of the works above water. To mitigate the risk of construction debris contaminating the water below, floating boom curtains and catch nets were strategically installed. The remediation of deteriorated concrete structures was approached in two stages. Once the initial concrete breakout was completed, a detailed inspection, conducted with the client's project superintendent, determined the dimensions and extent of deterioration in areas requiring treatment. This collaborative effort also identified the most suitable methodologies and products for remediation.

Addressing the challenge of manual handling in the context of tidal movements, the design prioritised lightweight elements for new beams and brackets. Despite the substantial length of the beams (over 6m) and their weight (approximately 180kg each), along with brackets weighing over 16kg, heavy-duty trolleys equipped with hydraulic lifters facilitated the swift layout of beams on the deck, streamlining the installation process.

Community benefits

Also known as the Teneriffe Riverwalk, the Catalina Riverwalk is one of Brisbane’s most scenic walks in the inner-city incorporating some of Brisbane’s most historic sites ending at the Brisbane Powerhouse. Used daily by locals and tourists, its maintenance is integral for preserving the city's vibrancy. Abergeldie and Brisbane City Council have extended the Riverwalk's longevity with reduced maintenance by installing environmentally friendly fibre-reinforced plastic (FRP) beams.

Beyond its practicality, the Catalina Riverwalk holds cultural significance, hosting a submarine heritage-themed trail and historic landmarks such as the Goldsborough Most building and Barko & Co, a café formerly known as the Engine Room, built in 1908. Pedestrians and cyclists traverse the Submariners Walk Heritage, commemorating the submarine base from World War II. Abergeldie takes pride in contributing to the remediation of this historic and culturally significant landmark in inner-city Brisbane.