Queensland’s energy landscape is undergoing a significant, multi-billion-dollar transformation, with recent developments underscoring the state’s commitment to strengthening its transmission network. This week, Powerlink awarded a major contract for the Calvale to Calliope River Reinforcement Project, while substantial earthworks commenced on the CopperString 2.0 initiative, projects set to fundamentally reshape how electricity is delivered across the state and potentially influence future power bills for Queensland households and businesses.
On 28 September 2026, Powerlink, the state-owned transmission network service provider, announced the appointment of Zinfra to construct a critical section of the transmission line between the Calvale substation near Biloela and a new Gladstone West substation south of Mount Larcom. This follows an earlier contract awarded to Consolidated Power Projects (CPP) on 1 September 2026 for another 20km segment of the same project. This reinforcement project involves an 87km double-circuit 275kV transmission line and essential substation upgrades, designed to bolster electricity supply in the Gladstone region and facilitate the integration of up to 1800MW of new renewable generation capacity.
Concurrently, the much-anticipated CopperString 2.0 project, which received a $3.2 billion earmark in this year’s State Budget, saw major earthworks commence on the new Flinders substation south of Hughenden. Announced on 29 September 2026, this milestone marks tangible progress on a project critical for connecting North West Queensland’s rich mineral and renewable energy resources to the National Electricity Market (NEM).
A Strategic Shift Amidst Policy Debate
These significant infrastructure investments come within the context of Queensland’s evolving energy policy. The Queensland Energy Roadmap, unveiled in October 2025, notably repealed the state’s previous legislated renewable energy targets of 70% by 2032 and 80% by 2035. Instead, the roadmap focuses on achieving net-zero emissions by 2050, extending the operational life of coal-fired power stations until at least 2046, and prioritising private sector investment alongside government-owned corporations.
The Clean Energy Council (CEC), in a statement on 29 September 2026, acknowledged the passage of the Queensland Energy Roadmap Amendment Bill 2025 but expressed reservations about this shift.
“The Clean Energy Council and our members acknowledge the passage of Queensland’s Energy Roadmap Amendment Bill 2025, which recognises the important role that renewables will continue to play in Queensland’s energy mix. However, we remain concerned about a lack of ambition set out in the State Government’s Energy Roadmap, which outlines up to 6.8 GW of new wind and large-scale solar farms, and up to 3.8 GW of storage capacity are projected to be brought online by 2030.”
Despite the removal of explicit legislated targets, Powerlink CEO Dr Seán Mc Goldrick emphasised the necessity of these transmission upgrades. “The reinforcement of the transmission line between Calvale and Calliope River is critical as the power system evolves,” Dr Mc Goldrick stated, highlighting the foundational role of robust infrastructure regardless of specific generation mix targets.
Impact on Queensland Households
For average Queensland households, these massive grid investments are designed to deliver long-term benefits in the form of enhanced grid reliability and, potentially, more stable electricity prices. By enabling the connection of new, often cheaper, renewable energy sources and improving the flow of power across the state, these projects aim to reduce wholesale electricity costs and minimise network congestion. This, in turn, can mitigate upward pressure on retail electricity bills.
While direct, immediate savings are unlikely, the stability offered by a modernised grid is a crucial component of future energy affordability. Queenslanders concerned about their energy costs may find value in understanding broader government initiatives aimed at supporting consumers. For more information, refer to our guide on Navigating Australia’s Energy Bill Relief and Support in 2026: A Comprehensive Guide.
Strategic Importance of Transmission
The Calvale to Calliope River Reinforcement Project will significantly increase network capacity in the industrial-heavy Gladstone region, supporting existing industries and new energy demands. Meanwhile, CopperString 2.0 is expected to unlock the vast renewable energy potential of North Queensland, integrating large-scale wind and solar projects like the recently approved 1.4 GW Wongalee and 1.4 GW Bungaban wind projects, which received environmental approval on 29 September 2026 and are slated for construction in 2027.
These projects are vital for creating the Renewable Energy Zones (REZs) envisioned in the Queensland Energy and Jobs Plan. Even with the policy shift on legislated targets, the physical infrastructure is indispensable for connecting any new generation, whether from government or private investment. The state’s continued investment in transmission infrastructure, such as the Ingham South Substation Reinvestment Project which is also progressing with a new control building delivery expected in mid-to-late October 2026, demonstrates a consistent focus on network resilience.
Looking Ahead
The scale of these projects, including the $3.2 billion allocated to CopperString, highlights a proactive approach to grid modernisation. While the policy debate around renewable energy targets continues, the physical backbone of Queensland’s future energy system is being built now. This infrastructure is essential not only for integrating new generation but also for supporting advanced grid technologies that could enable more dynamic pricing and consumer-side management. For insights into how such technologies might impact your household, explore articles like Smart Meters & ToU Tariffs: Slash Your 2026 Winter Electricity Bill by $229+.
The long-term success of Queensland’s energy transition will hinge on the timely and efficient delivery of these major transmission projects, ensuring that the state can harness its abundant natural resources to provide reliable and affordable power for decades to come.