The ‘single-lift’ of the steel pylon centrepiece into its vertical position was a major project highlight.
Tony Dempsey

Tony Dempsey

Farrans Victor Buyck Construction JV
JV Partner
Buro Happold Consulting Engineers
Sunderland, UK


Roughan & O’Donovan is providing consultancy services - from tender through to completion of construction - for the permanent works structures on this large scale infrastructure design and build scheme.


The bridge crossing comprises a 24m wide steel concrete composite deck construction cable, supported over 240 metres from a steel A-frame pylon, with sections of concrete and concrete/steel composite construction.

  • 105

    Height in metres of the bridge pylon
  • 1550

    Weight in tonnes of the bridge pylon
  • 15

    Number of hours it took to raise the pylon


Major and minor structures designed to facilitate the scheme construction included:

  • 140m long x 25m wide piled basal mattress
  • Reinforced earth wall retained embankment up to 9 metres in height
  • Retaining walls of sheet pile, contiguous bored pile and reinforced earth construction

The bridge pylon was fabricated in one piece off-site. It was then towed by barge into the Port of Sunderland.


The raising of the bridge pylon was a challenging operation.  It marked the culmination of 2 years of design and planning and 12 months of fabricating.


Watch a video showcasing almost 3 years’ of construction work on the bridge.

Services provided:

  • Bridge engineering design
  • Structural engineering design
  • Geotechnical
  • Temporary works
  • Electrical
  • Lightning protection
  • Road engineering design services