Major Bridge Operation Captured as Gantry Lowered from Prince of Wales Crossing

New footage released by National Highways reveals the complex operation to remove a 25-tonne gantry from the Prince of Wales Bridge, lowering it safely to the waters below.

During a carefully coordinated weekend project, teams from National Highways, Amey and Denholm Industrial worked together to dismantle and lower the 34-metre-wide structure. The gantry was gradually descended around 40 metres onto a barge positioned beneath the bridge.

The operation required precise planning and execution, with some crew members secured to the structure above while the lift was carried out. National Highways described the task as a highly technical process, showcasing the level of expertise needed to maintain key infrastructure in challenging conditions.

Mark Maynard, Engineering and Construction Manager for the Prince of Wales Bridge, highlighted the ongoing effort required to keep the network safe and operational. He noted that much of the UK’s motorway infrastructure dates back around six decades, meaning continuous maintenance is essential—particularly for structures exposed to harsh environmental conditions like the estuary crossing.

He explained that the gantry had reached the end of its operational lifespan, making replacement more viable than continued repairs. Although it had served reliably for many years with regular inspections and upkeep, its removal had been months in the planning.

The structure was dismantled in two sections and lowered onto a waiting barge, effectively reversing the process used when it was first installed in 1996. It will now be transported for recycling.

Kyle Davidson, Regional Manager at Denholm Industrial Services, praised the collaboration between project partners, noting that despite technical and environmental challenges, the teams successfully delivered the operation.

Design work for the replacement gantry is already underway, with installation expected to take place within the current financial year.