SSEN Transmission has completed the first of 47 steel lattice towers on the 13.3km Creag Dhubh–Dalmally 275kV overhead line in Argyll, signalling a significant step forward for Scotland's electricity transmission network and the move to cleaner power.

The scheme is a key element of SSEN Transmission's Argyll and Kintyre 275kV Reinforcement project, linking the new Creag Dhubh substation to the existing grid at Glen Lochy, near Dalmally. It is designed to strengthen the regional network and unlock capacity to connect and transport renewable energy, supporting UK and Scottish Government clean energy and energy security goals.

More than 9km of access tracks have been built to support safe, efficient delivery across challenging terrain. Tower assembly is now progressing along the route, with foundations for the remaining structures advancing well.

The new line will feed into a 275kV substation at Creag Dhubh near Cladich. Since construction began in summer 2024, the substation works have reached around the halfway point. Earthworks have been completed, with over 350,000 cubic metres of material moved on site to form a stable platform, alongside robust environmental measures to protect sensitive habitats during construction.

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Principal Contractor BAM Nuttall has finished the two main GIS substation buildings, enabling Siemens Energy to start electrical installation work early in 2026.

Despite periods of difficult weather, the project remains on schedule, supported by a committed workforce and close collaboration with local businesses. Clachan-based A&L McCrae, working for Wood Group, has supplied concrete for both substation and overhead line activities and is providing stone for access track construction. Oban-based TSL Contractors has delivered the substation buildings for BAM Nuttall. Both firms have been instrumental to progress so far.

SSEN Transmission continues to engage with local communities and the supply chain to maximise regional opportunities. The project is expected to bring long-term benefits by improving network resilience and enabling the connection of homegrown renewables, bolstering Scotland's clean power ambitions and energy security.

David Fraser, SSEN Transmission's Lead Project Manager said: "Completing the first tower is a major milestone for the Creag Dhubh–Dalmally overhead line project and a testament to the hard work and dedication of our teams and delivery partner Wood Group.

"We've also seen significant progress at Creag Dhubh substation, with our Principal Contractor BAM Nuttall and TSL working tirelessly through challenging weather conditions to deliver the earthworks and complete the two main buildings – a huge step forward for the programme.

"Importantly, this achievement reflects the strength of collaboration with local businesses. Working with Clachan-based A & L McCraes and Oban-based TSL has been invaluable, not only in delivering high-quality work but also in supporting the local economy and creating lasting benefits for the community.

"This infrastructure is vital to unlocking Scotland's renewable potential and delivering a secure, low-carbon electricity network for generations to come, while also bolstering Argyll's own energy security."

Further details on the Creag Dhubh–Dalmally overhead line project can be found at ssen-transmission.co.uk/projects/creag-dhubh-dalmally