Re-erection Under Way on 1831 Whorlton Suspension Bridge After Major Redesign

Work to reconstruct the Whorlton Suspension Bridge in County Durham has entered its re-erection phase following an extensive design review that found many of the original components were no longer structurally sound.

The Grade II-listed structure, which opened in 1831, is recognised as the UK’s oldest road suspension bridge whose deck remains supported by its original iron chains. Spanning the River Tees near the village of Whorlton, it has been closed since 2020.

Scheduled monument consent for the restoration was granted in December 2023, and by the end of 2024 the bridge had been fully dismantled as part of a conservation and strengthening programme.

Contractor VolkerLaser first removed the timber carriageway, footway and longitudinal beams, followed by hanger rods and the main chains. Around 1,800 individual components were carefully catalogued and stored on site with the intention of reinstating them in their original positions wherever possible.

However, detailed inspections revealed widespread deterioration. Assessments included visual examinations, Magnetic Particle Inspection, radiography and load testing. The results showed that a number of critical elements could not safely be reused in load-bearing roles, prompting a redesign agreed with Historic England.

Under the revised approach, new structural components will be fabricated to replicate the appearance and strength of the original chain system. The historic wrought-iron chain arms will remain in place as a non-load-bearing façade, preserving the bridge’s character. The hanger rods have also been redesigned to retain their historic appearance while incorporating a new tuning system to simplify maintenance and prevent the distortions that contributed to earlier structural issues.

Since the redesign was approved in December 2025, the team has been manufacturing replacement parts, trialling a new timber deck and installing new chain bearing blocks along with reconditioned cast-iron saddles. Preparations are now under way to re-erect the bridge structure on site.

Strengthening works at the anchorages have also progressed. On the north side, five reinforced concrete piles and a pile cap with two anchor beams have been installed. On the south side, six piles and a pile cap have been completed.

VolkerLaser aims to finish the installation phase by July, with road reinstatement and demobilisation scheduled for August.

The project, funded through Durham County Council’s £20M allocation from the first tranche of the government’s Levelling Up Fund in 2021, highlights both the engineering complexity and conservation challenges of restoring early 19th-century ironwork to meet modern safety standards. While technically demanding, the scheme has generally been welcomed by residents and heritage groups keen to see the historic crossing returned to public use.