Creag Dhubh Substation
Proven Capability Across Scotland
Project Overview
The Creag Dhubh Substation project involved the construction of a new 275/132kV Gas Insulated Switchgear (GIS) substation, forming a critical component of the electricity transmission network upgrade connecting Creag Dhubh to the Scottish Power transmission system at Dalmally–Windyhill. The development also included 13.5km of new overhead transmission lines, strengthening grid capacity across the Argyll region. The project forms part of wider UK and Scottish Government ambitions to modernise electricity infrastructure, increase network resilience and enable the connection of low-carbon and renewable energy generation.
The facility supports the transition towards a decarbonised electricity system and contributes to Scotland’s legally binding target of achieving net zero greenhouse gas emissions by 2045, alongside the UK’s net zero target by 2050. Taylor and Fraser were appointed to deliver the mechanical and electrical installation within the substation buildings, supporting the safe and reliable operation of this strategically important energy infrastructure.
Client
BAM / SSEN - SSEE
Location
Inverary / Dalmally
Programme Duration
8 months
Taylor And Fraser Role
M&E subcontractor
Taylor and Fraser Role
Taylor and Fraser delivered the full M&E installation across both GIS facilities and associated control room areas. This included installations within the 132kV GIS Hall, configured across two operational levels, and the 275kV GIS Hall, designed in an end-to-end configuration.
All works were delivered in close collaboration with BAM, Siemens and specialist subcontractors to ensure compliance with the stringent performance, safety and environmental standards required for modern high-voltage infrastructure. The installation supports the reliable transmission of electricity generated from renewable sources and strengthens the capacity and flexibility of the national transmission network
Key Challenges
The two-level configuration of the 132kV GIS Hall required careful planning and coordination between installation zones. Using BIM modelling, Taylor and Fraser carefully designed containment routes to maximise available space, minimise cable runs and prevent clashes with structural and follow-on trades. Close collaboration with Siemens ensured containment systems were installed in precise locations to support the installation and future maintenance of critical switchgear equipment.
The ground level installation incorporated control rooms and welfare facilities, all delivered to full specification and handed over ready for operational use. The 275kV GIS Hall presented additional coordination challenges due to its end-to-end layout.
BIM modelling was again used to optimise containment routing and ensure installation accuracy. Mechanical and electrical installations were strategically positioned within four metres of finished floor level, improving long-term accessibility and maintainability of the facility and supporting whole-life asset performance. Particular attention was required when installing service penetrations into specialist areas such as the battery room, where exact setting-out was critical to maintaining system integrity and safety compliance.
Supply Chain Collaboration
The remote location of the site required careful logistics planning and strong supply chain collaboration. Taylor and Fraser worked closely with wholesale suppliers to coordinate deliveries, including arranging materials outside normal working hours to support installation sequencing and reduce programme risk. This collaborative approach supported efficient delivery, reduced unnecessary transport movements and aligned with best practice sustainable construction principles.
Our Approach
Taylor and Fraser implemented an 11-day on / 3-day off rotational working pattern to support workforce wellbeing while maintaining programme continuity in a remote location. A comprehensive logistics and resource management strategy was developed, supported by the use of local accommodation and engagement with local businesses and communities, contributing to regional economic benefit and reducing travel-related carbon emissions.
Throughout the project, Taylor and Fraser maintained a strong focus on detailed planning, quality assurance and right-first-time installation. This approach minimised rework, reduced material waste and supported sustainable construction delivery. Close collaboration with project partners ensured works were delivered safely, efficiently and in alignment with industry best practice for low-carbon infrastructure delivery.
The Outcome
The successful delivery of the Creag Dhubh Substation has created a high-quality, fully compliant energy infrastructure facility that strengthens electricity transmission capacity across the Argyll region. The development supports increased integration of renewable energy generation, enhances energy security and contributes directly to national decarbonisation objectives.
The project demonstrates Taylor and Fraser’s capability in delivering complex M&E installations within challenging and remote environments, reinforcing our position as a trusted delivery partner within the energy, power and renewables sector and supporting the UK and Scotland’s transition towards a secure, resilient and net zero energy system
