Last updated: 20 Aug 2026
What are we doing?
Transpower is moving into the investigation phase for a new 110 kV transmission line between Cromwell and a new substation in the Arrow Junction area.
This is part of a broader, coordinated programme of work to meet Queenstown’s long-term electricity needs, working with local lines companies Aurora Energy and PowerNet. The two distribution companies are actively supporting more rooftop solar, batteries, smart EV charging and other smart technology to help manage growing electricity demand in the region.
Why are we doing it?
Demand for electricity is continuing to increase in and around Queenstown in line with our expectations.
Work has recently been completed to safely maximise how much electricity the existing transmission line between Cromwell and Frankton can deliver. The installation of two news transformers at Frankton, completed in May 2025, and an upgrade to the line and towers, completed in May 2026, have increased available electricity to the region by at least 60% in summer and at least 40% in winter.
However, to meet the demand Transpower expects to see in ten years’ time, particularly during winter, the region will need a new transmission line.
Along with local electricity network investment, the additional security a new line offers will mean growth in Queenstown can happen with confidence. An additional transmission line means there’s much less risk of unplanned outages on the coldest, busiest winter days or when transmission network maintenance is needed.
Timeline and updates
Process
No route or corridor has been finalised. Large-scale transmission projects like this generally take five to eight years to investigate, consent, plan and deliver. We’ll spend around three years working through the investigation phase, which involves a range of environmental, geotechnical and electrical studies.
Transpower is committed to engaging with a wide range of stakeholders including the local community and Ngāi Tahu through the next phase to understand and work through the opportunities and local impacts.
Related updates
More information
More information is available at www.energisingqueenstown.co.nz