Moranbah North Rail Realignment
The Anglo Moranbah North Rail Diversion Project in Central Queensland involves constructing a 10.79 km rail alignment. This project replaces a section of the Goonyella line to facilitate the expansion of Anglo American’s Moranbah North underground coal mine.
Sector
Rail
Location
Central Queensland
Project Overview
The Anglo Moranbah North Rail Diversion Project is a critical infrastructure initiative supporting the future expansion of Anglo American’s Moranbah North underground coal mining operations in Central Queensland. The project involves the construction of a new 10.79 km rail alignment that will enable the decommissioning of a section of the existing Goonyella rail line, which currently restricts the progression of mining activities.
Client’s Requirements
For the Moranbah North Rail Realignment project, Aurizon required a commercially robust and technically defensible cost and scope assessment to support rail infrastructure modifications associated with mining operations at Moranbah North in Queensland, operated by Anglo American. Aurizon required a clear definition and validation of the rail realignment scope, including track works, formation treatment, drainage, signalling interfaces, and integration with existing operational coal haulage infrastructure. Given the interface with a live heavy-haul rail network, the solution needed to minimise operational disruption, maintain safety and compliance standards, and align with rail access and operational requirements.
A key requirement was the preparation of a detailed and transparent cost estimate underpinned by first-principles rate build-ups and clearly defined delivery assumptions. The client required cost certainty appropriate to the project’s development stage, including identification and quantification of key risks such as geotechnical conditions, possession constraints, constructability challenges, stakeholder interfaces, and supply chain factors.
Additionally, Aurizon required governance-ready reporting outputs to support internal capital approval and investment decision-making processes. Estimates, risk allowances, and contingency provisions were required to be evidence-based, auditable, and suitable for comparison against alternative design or staging options.
Overall, the client sought an integrated commercial and technical assessment that balanced operational continuity, safety, and constructability with cost efficiency—ensuring the proposed rail realignment could be advanced with confidence in its financial robustness and delivery feasibility.
Our Contribution
Anhur Dynamics Consulting delivered a commercially rigorous and risk-informed cost advisory service to Aurizon, supporting capital approval and investment decision-making.
Our role included a detailed review of all available design documentation to validate scope definition, construction methodology, productivity calculations, and preparation of a Class 3 first-principles estimate developed from detailed quantity take-offs and productivity-based rate build-ups aligned with heavy-haul rail delivery methodologies. The estimate clearly separated direct costs, indirect costs, preliminaries, escalation, and project allowances, ensuring transparency and auditability in line with governance requirements. Cost modelling incorporated live rail possession constraints, constructability considerations, and operational interface requirements to ensure realism in both methodology and pricing.
In parallel, we undertook a comprehensive Quantitative Cost Risk Assessment (QCRA) to identify, analyse, and model key project risks. Risk drivers— including geotechnical uncertainty, access limitations, staging interfaces, market conditions, and stakeholder dependencies—were quantified using structured workshops and probabilistic modelling to establish statistically derived contingency allowances aligned with the project’s maturity.
We also provided technical and commercial advice throughout the development process, refining scope assumptions, validating delivery methodologies, and ensuring consistency between scope definition, program logic, and cost modelling. This integrated approach strengthened the integrity of the business case, enhanced cost certainty, and provided Aurizon with a defensible, governance-ready investment position for the proposed rail realignment.
Competitive Advantage
-
Establishing a Class 3 first-principles estimating framework aligned with heavy-haul rail delivery methodologies and capital governance requirements
-
Integrating detailed quantity take-offs and productivity-based rate build-ups to ensure transparency and technical alignment with live rail construction constraints
-
Undertaking a comprehensive Quantitative Cost Risk Assessment (QCRA) to systematically identify, model, and quantify geotechnical, possession, interface, and market risks
-
Aligning scope definition, program logic, and cost modelling to eliminate ambiguity and ensure consistency across technical and commercial inputs
-
Implementing structured cost reporting outputs suitable for internal capital approval and audit review
-
Providing risk-informed contingency modelling to strengthen funding confidence and reduce downstream cost escalation exposure
Anhur Dynamics Consulting brought specialist rail infrastructure expertise through the capabilities of our Brisbane office, delivering industry-leading cost management, estimating, and risk advisory services underpinned by proven methodologies and disciplined commercial systems. Through rigorous first-principles modelling, probabilistic risk analysis, and governance-ready reporting, we enhanced cost certainty, strengthened investment confidence, and aligned the project’s financial position with Aurizon’s delivery and capital approval objectives.