Keynote Speaker: Andy Hagan (New Zealand Infrastructure Commission) – From Plans to Performance – Putting the NIP’s ‘Start-with-Maintenance’ Agenda to Work
Panel Session: Lifting NZ Productivity through innovative Infrastructure Management
Other speakers:
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Keynote: From Plans to Performance – Putting the NIP’s ‘Start-with-Maintenance’ Agenda to Work
New Zealand spends more on infrastructure than most OECD nations yet ranks near the bottom for “bang-for-buck” – a gap driven by weak asset-management practice and chronic under-funding of renewals.
The Draft National Infrastructure Plan (NIP) flips the script with a “Start-with-Maintenance” mandate, legislating 10-year AM-investment plans, transparent performance reporting and independent assurance for central-government agencies. Andy Hagan will set out:
Delegates will leave with a clear view of where the NIP lands, what will change in their day-to-day practice, and where their expertise is critical to success.
Advanced corrosion modelling for lifetime extension of overhead power transmission lines
Transpower’s Transmission lines span over 12,000 kilometres across New Zealand. The lines traverse through varying terrain such as the benign Central Otago region right through to extreme salt spray and corrosion areas such as Tiwai and Oteranga Bay. The terrain makes corrosion highly localised with salt transport coming many kilometres inland due to wind funnelling. With an aging fleet, the forecasted reconductoring spend over the next 15 years was increasing from $50M to $250M per year.
Historically the conductor health model forecasting replacements used age and an expected life using conductor type, location and where it was known that the conductor was not fully greased (grease holidays). This would be manually adjusted for observed condition and eddy current “Cormon” testing that detects the zinc galvanising loss on the steel core strands. While these methods are relatively advanced by international standards, they have remained inherently conservative. Transpower needed a model that could confidently and safely extend the forecasted replacement life.
Drone condition assessment and the defect model has provided Transpower with the ability to manage the risk and flatten the reconductoring curve. It allows for a manageable ramp up in heavy wiring crew resources, reduces revenue price shocks and buys time to align replacements with tactical upgrades to incorporate new power demand.
The defect model uses drone visual data being acquired alongside accelerated corrosion testing, and destructive testing. Corrosion of the aluminium strands in Aluminium Clad Steel Reinforced (ACSR) creates a white corrosion product that fills the void spaces between strands and creates bulges. The model can assess if the conductor is safe to maintain in service and predict when it will become unsafe. The model uses Finite Element sub-modelling of bulges, and a power line design global modelling program (PLS-CADD) for defined weather cases and risk profiles. The challenges include automated image processing, storage and retrieval of drone data. Defects are classified as broken strands, white powder, bulging, strands out of lay, spacer damage, copper corrosion etc, with the white power bulges in ACSR cables being processed further by the defect model. The model includes modelling the increases in temperature at bulges due to loss of aluminium cross-sectional area, and the decrease in yield stress and ultimate tensile stress.
The defect growth rate has been estimated to forecast replacement in the longer term. The model was calibrated using destructive testing of ex-service samples and accelerated corrosion/salt spray cabinet samples. Corrosion maps based on historical changes in condition assessment data, and a NZ industry standard based on atmospheric corrosion of coupons, are used to estimate the defect growth rates.
Innovating back to the future
In infrastructure landscape, innovation is often heralded as the catalyst for transformation. Yet, as we embrace new technologies, methodologies, and paradigms, a paradox emerges: the more we change, the more it stays the same. This discussion explores how innovation—while reshaping tools, processes, and expectations—often reinforces the enduring principles of aligning or adopting standards, disciplined delivery and good governance.
Looking at AT asset management we’ll examine how digital twins, automated and rapid data collection predictive analytics have improved delivery. However, these innovations consistently circle back to foundational principles
In particular, we reflect on the growing expectation of artificial intelligence as a perceived panacea. While AI offers powerful tools for forecasting and optimisation, there are few magic solutions. Advocates of AI as the ultimate saviour should heed the old statistical warning: “lies, damned lies, and statistics.”, we could about to embark on data, damned data and AI. Without context, oversight, and critical thinking, even the most advanced models risk reinforcing bias or obscuring nuance.
This discussion challenges attendees to rethink innovation not as disruption, but as evolution—a means of refining what already works or what could work better to answer old and new problem. It highlights how embracing change can deepen our commitment to enduring principles, ensuring that while our methods evolve, our mission remains constant.
City Rail Link – The Rail Assets journey from requirements through to entering service
The City Rail Link (CRL) represents a transformative leap in Auckland’s transport infrastructure, with its rail assets forming the backbone of a modern, high-capacity urban transit system.
This presentation traces the journey of the CRL’s rail assets —from the initial articulation of stakeholder and operational requirements, through detailed design and construction installation and inspections, to the rigorous assurance processes of dynamic train testing, prior to the rail assets being accepted into KiwiRail’s network for operational service.
Sweating the Data Assets
Asset management maturity is sometimes seen as a proxy for asset management performance. The typical asset management maturity assessment seeks detailed evidence on how the organisation plans to achieve its asset management objectives and how those plans are being implemented by teams every day. A corresponding diagnostic on how well the asset management system is performing in terms of risk, cost and performance outcomes is usually missing.
This presentation will discuss case studies that apply quantitative analysis of data that are often available but buried in asset management information systems, to provide deeper, more actionable insights, including early warning indicators not visible in high-level reports.
Smart Seeds: Empowering Emerging Leaders Through Innovation
Smart Seeds is a design-led innovation program that empowers emerging leaders to find solutions to complex challenges. Participants build critical innovation skills and valuable networks while collaborating in multi-organisational teams.
This high energy presentation will show you a different approach to learning through a hands-on collaboration beyond traditional online courses focused on addressing challenges impacting your clients and community.
Emerging Leaders from social agencies government, consultants, contractors are brought together to collaborate towards resolving complex issues facing our communities empowering them to innovate, advocate and influence change.
The presentation will describe the journey and share some amazing stories from our Emerging Leaders.
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