Practice
Durable, low maintenance marine infrastructure
Aspect contributions
How this practice contributes to the green port aspects.
| Aspect | Role | Justification |
|---|---|---|
| Engineering Design | Core | - |
| Risk Management | Secondary | - |
| Development Planning | Secondary | - |
| Materials Selection | Secondary | - |
| Maintenance | Secondary | - |
| Materials Handling | Secondary | - |
| Resource Use and Waste Management | Secondary | - |
Summary
Durable, low-maintenance marine infrastructure is a cornerstone of sustainable port and maritime development.
-Marine assets such as quay walls, jetties, breakwaters, and revetments are exposed to aggressive environments including:
- -saltwater corrosion
- -wave loading
- -abrasion
- -biofouling
- -climate-driven extremes.
-Designing for durability and reduced maintenance is therefore essential not only for operational reliability, which have traditionally been a strong driver, but also for achieving long-term environmental, social, and economic sustainability outcomes (PIANC, 2016, PIANC, 2014a).
A key sustainability benefit of durable marine infrastructure is the reduction in whole of life environmental impact. Frequent maintenance, repair, or premature replacement of marine structures typically involves high impact activities such as dredging, piling, heavy marine plant mobilization, and material replacement. These activities generate greenhouse gas emissions, disturb marine habitats, and increase underwater noise. By extending asset life through robust materials, protective detailing, and conservative design, ports can reduce cumulative emissions and ecological disturbance over decades of operation.
Details
Material selection plays a central role in durability and low maintenance outcomes. High-performance concrete with supplementary cementitious materials, corrosion-resistant reinforcement, fibre-reinforced polymers, and protective coatings are increasingly used to mitigate chloride ingress and steel corrosion (PIANC, 2016). See also Materials practice. While these measures may increase initial capital cost, life-cycle assessment can show lower overall environmental and financial cost where intervention frequency falls and service life is extended. The use of durable materials also supports circular economy principles by minimizing material consumption over time.
Case studies from Port of Brisbane, Port of Los Angeles and Port of Singapore are documented examples of the adoption of durable, low-maintenance design principles in the upgrade and extension of wharf infrastructure, including the use of high-durability concrete, enhanced cover to reinforcement, and materials selected for resistance to chloride ingress. These measures have been implemented to reduce long-term maintenance requirements in a highly aggressive marine environment while maintaining uninterrupted port operations (PIANC, 2016). Ports have used high-durability concrete, increased cover to reinforcement and chloride-resistant materials in wharf upgrades to reduce long-term maintenance. The Port of Alaska case below illustrates a long design-life approach.
The use of low maintenance infrastructure is particularly important in the Asia-Pacific context, where limited resources, expertise or remoteness (such as islands) can benefit hugely from design of infrastructure requiring little (or less) maintenance. Further low maintenance durable design is a necessity in many settings. See PIANC (2026) MarCom Working Group 240, Guidance for Ports in Small Island Countries.
For example, several small and medium scale ports and ferry terminals across Indonesia have adopted HDPE modular fender panels and floating pontoon systems, specifically selected for low maintenance performance in tropical marine environments, offering high resistance to corrosion, biofouling, and UV degradation compared to steel or reinforced concrete alternatives (PIANC, 2026). The modular nature of the equipment allows damaged components to be replaced individually, reducing downtime and marine construction impacts. Modular HDPE fender panels and floating pontoons are one option where corrosion resistance and replacement of individual components matter.
Design detailing and constructability are equally important. Features such as sacrificial elements, robust fender systems, access for inspection, and avoidance of complex or failure-prone details can substantially reduce maintenance demands. Designing structures to tolerate damage and degradation, rather than requiring pristine conditions, supports operational resilience and reduces the need for reactive repairs, which are often environmentally disruptive.
Durable and low-maintenance infrastructure also contributes to climate resilience. As sea levels rise and extreme weather events become more frequent, poorly performing marine infrastructure may require repeated emergency interventions or face early failure. Designing for higher durability, adaptable freeboard, and robust load capacity can help assets withstand future conditions with less intervention, reducing climate risk and the carbon footprint of repeated upgrades.
From a social and economic perspective, reduced maintenance requirements enhance port reliability and safety. Maintenance works in active ports often disrupt operations, increase safety risks, and affect surrounding communities through noise and traffic. Durable infrastructure minimizes these disruptions, supporting stable supply chains and improving social acceptance of port activities.
In summary, durable, low-maintenance marine infrastructure can deliver sustainability benefits by reducing life-cycle emissions, protecting marine ecosystems, enhancing climate resilience, and improving operational reliability. Embedding durability into design decision-making, from materials and detailing to inspection and access strategies, aligns engineering practice with longterm sustainability objectives and is consistent with lifecycle-based design guidance.
Enabling factors
Clear regulatory frameworks, procurement policies, and lifecycle-based standards (e.g., durability design requirements, low-carbon materials mandates, and whole-of-life asset management) incentivize ports to prioritize long-lasting, low-maintenance infrastructure that reduces environmental impact and operational costs.
Advances in materials (e.g., high-performance concrete, corrosion-resistant steels), digital asset management, and updated engineering standards enable infrastructure to withstand harsh marine conditions while minimizing maintenance needs and extending service life.
Procurement aligned to lifecycle-based standards and whole-of-life asset management, specifying durability and low-maintenance performance rather than lowest upfront price. Lifecycle cost and carbon assessment justifies higher initial capital where it reduces intervention frequency, cumulative emissions and marine disturbance over the asset life.
Not applicable.