Collett has completed the transport and installation of an 89.9-tonne Hyosung transformer for National Grid’s Bicker Fen Substation in Lincolnshire, overcoming significant logistical and engineering challenges during the multi-phase project.
The transformer was shipped from the Port of Rotterdam to the Port of Immingham via RoRo ferry after being loaded onto a 5-bed, 5-trailer axle configuration. Following arrival in the UK, the unit was transported to Collett’s Goole Heavy Lift depot for storage and preparation before the final delivery to the substation.
A major challenge emerged just 0.6 miles from the destination at Cowbridge over Hammond Beck, where structural assessments determined the bridge could support a maximum load of only three tonnes. To overcome the restriction, Collett deployed a specialist bridge-over-bridge system that allowed the heavy transport configuration to cross safely without transferring the full load to the existing structure. The operation was supported by engineered crane pads capable of withstanding up to 50 tonnes per square metre, facilitating both the installation and removal of the temporary bridging system.
Additional enabling works included the construction of approximately 1.5 miles of temporary trackway along the final approach route to widen access and improve ground conditions. The 89-mile journey from Goole to Bicker Fen was carried out under police escort and required extensive route planning, including swept-path analysis and coordination with multiple local authorities. Traffic management measures were implemented at key locations, including Bicker Bar roundabout.
Upon arrival at site, Collett’s heavy lift team installed the transformer using jacking and skidding techniques. A 30-metre skid track was constructed in advance, allowing the transformer to be transferred from the trailer and precisely positioned above its foundation plinth before being lowered into place using hydraulic jacking systems. Anti-vibration matting and positioning plates were incorporated to ensure accurate alignment and long-term operational stability.
The project involved close collaboration with a range of stakeholders, including WSP for bridge assessments and AECOM for crane pad design. Completed on schedule, the operation supports National Grid’s ongoing infrastructure upgrades and wider energy network reinforcement across the region.
