Featured Project
Callide DNA
Critical Energy Transmission Infrastructure
Critical Energy Transmission Infrastructure
Our comprehensive engagement covered every critical aspect of cost and risk management for the Callide DNA project.
Category 2 estimate across all project elements including the 87 km double-circuit 275 kV transmission line, grid connections, and substation expansion works.
Assessment of construction methodology across Central Queensland terrain, including access logistics, environmental constraints, and live network interface management.
Development of construction schedules and sequencing strategies for multi-stage delivery, coordinating transmission line works with substation expansion activities.
Comprehensive risk register development, quantitative analysis, and development of risk mitigation and contingency strategies for the designated network asset.
Independent commercial assurance including procurement strategy review, contract packaging, and market engagement considerations for the transmission corridor.
Third-party verification providing Powerlink Queensland with confidence in project cost and risk profiles for this critical grid reinforcement investment.
Reinforcing Central Queensland's transmission network through 87 kilometres of high-voltage double-circuit infrastructure.
The Callide DNA project forms part of the Calvale to Calliope River Transmission Line Reinforcement, a critical upgrade to Queensland's electricity transmission network. The project will deliver an 87-kilometre double-circuit 275 kV transmission line connecting Calvale Substation near Biloela to Calliope River Substation near Gladstone, ensuring long-term network reliability for the region.
The project comprises a double-circuit 275 kV transmission line with grid connections at both Calvale and Calliope River substations. Works include the expansion of Calliope River Substation with new equipment including reactors for power system stabilisation, transformers, and synchronous condensers to maintain system strength across the network.
The Callide DNA is a key component of the broader Gladstone Grid Reinforcement program, ensuring network reliability as the Gladstone area transitions through the eventual retirement of coal-fired generation. The reinforcement supports increased electrification of heavy industry and enables connection of new renewable energy generation across Central Queensland.
The Ministerial Infrastructure Designation (MID) Proposal Report was released for community consultation in November 2025. Construction is targeted to commence in mid-2026, with project completion expected by late 2028. The project requires Federal Government approval under the EPBC Act 1999, with Powerlink now accepting connection enquiries for the new transmission corridor.
Cenex delivers independent cost estimating and risk management for Australia's most complex energy and infrastructure projects.