Winvic and Mott MacDonald on Wear bridge: scour repair options for designers
Reviewed by Tom Sullivan
First reported on The Construction Index
30 Second Briefing
Winvic Construction has been appointed design-and-build contractor, with Mott MacDonald as designer, to protect the 1970s Witton-le-Wear bridge carrying the A68 over the River Wear, where an upstream gravel bank has shifted the channel, causing bank erosion, localised undercutting and damage to the paved apron at the southern pier. The scheme will develop options for structural repairs and scour protection to the southern embankment extending upstream, with the northern pier and embankment also under assessment. Final solutions will follow detailed river modelling, durability assessments and cost analysis by Durham County Council and its consultants.
Technical Brief
- Bridge superstructure comprises two arched, tapered in-situ RC beams with a reinforced concrete slab deck.
- Gravel-bank-induced planform change has concentrated flow at the southern pier, intensifying local scour risk.
- Damage to the existing paved apron suggests previous scour countermeasures are now hydraulically outflanked or undermined.
- Northern pier and embankment are under active condition assessment, indicating potential extension of scour countermeasures.
- Durham County Council and consultants are undertaking close monitoring, implying ongoing visual and possibly survey-based inspections.
- Survey and design phase will generate multiple repair and scour protection options before construction is committed.
- Detailed river modelling and durability assessments are being tied explicitly to cost analysis to prioritise resilient solutions.
Our Take
Mott MacDonald’s role on the Witton-le-Wear bridge follows its recent UK work as a technical adviser to Great British Energy – Nuclear, signalling that Durham County Council is tapping a consultancy currently active on nationally significant infrastructure risk and resilience questions.
Within our 927 Infrastructure stories, Mott MacDonald most often appears on large, complex transport schemes such as HS2’s Burton Green tunnel and the Auckland Motorway Strategic Plan, so its involvement here suggests Durham is treating the Wear crossing more like a strategic asset than a routine local structure.
NEPO’s presence alongside Durham County Council indicates this bridge protection package is likely being procured through a regional framework, which can shorten mobilisation times and standardise safety requirements across multiple local authorities in north-east England.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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