The Kendoon Surge Tank and Penstock Pipe, located in Scotland, are key components of Kendoon Power Station’s hydroelectric operation. The surge tank measures 35 m high by 15 m in diameter, while the penstock extends 150 m with a 5 m diameter, feeding water to the turbines below.
Over time, the original protective coatings had deteriorated, leaving the steel exposed to corrosion. To ensure continued safe and efficient operation, Scottish Power commissioned CRL to undertake a full refurbishment, including the removal of existing coatings and the application of a new protective system. The project was critical to extend the service life of these vital assets and maintain operational resilience.
Services Undertaken
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Removal of existing coatings to bare metal
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Erection of fully encapsulated scaffolding for blast containment and safe access
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Surface preparation via controlled abrasive blasting
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Application of four-coat epoxy paint system
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Construction of temporary access road to remote site
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Compliance with client-specific safety and environmental requirements
CRL undertook a complex programme of works on the surge tank and penstock, beginning with the removal of the aged coatings down to bare metal. Given the high lead content in the original paint, all abrasive blasting and surface preparation was carried out within a fully encapsulated scaffolding system to prevent environmental contamination. The scaffolding was designed not only to provide safe access for operatives but also to support the encapsulation material securely around the structures.
Following surface preparation, a four-coat epoxy paint system was applied to all steel surfaces to provide long-term corrosion protection. The remote location of the site required the construction of a temporary access road to deliver materials, plant, and operatives in line with Scottish Power’s strict safety requirements. All works were executed with meticulous planning and rigorous safety management, ensuring the integrity of the infrastructure while maintaining environmental protection standards.
“CRL expertly managed this highly challenging project. Works were carried out safely, efficiently, and exceeded the Client's expectations.”
Murray Soutar | Regional Director (Scotland & Ireland) | CRL
By applying a comprehensive corrosion protection system, CRL significantly extended the operational lifespan of the surge tank and penstock, reducing future maintenance demands and improving asset reliability. The project demonstrates CRL’s expertise in executing technically complex works in challenging, remote locations while ensuring environmental safeguards and operational continuity.
The encapsulated scaffolding and controlled blasting system exemplify CRL’s proactive approach to risk management, protecting both personnel and surroundings. Through close collaboration with Scottish Power, the works delivered not only structural durability but also enhanced resilience of the hydroelectric system. This project underlines CRL’s ability to combine technical precision with sustainable asset management practices, safeguarding critical infrastructure for decades ahead.
