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August 3, 2026 Projects

GRAHAM to build Didcot to Culham River crossing

A major infrastructure scheme to provide more sustainable, less congested travel options in and around Didcot has reached another important milestone.

Oxfordshire County Council has appointed GRAHAM to deliver the Didcot to Culham River crossing section of the Didcot and surrounding areas major infrastructure (HIF1) scheme. This is the third and final construction contract to be awarded for this scheme.

The project will enable more reliable journey times, improve pedestrian and cycling connectivity, support new employment sites and housing in and around Didcot, and help facilitate new and enhanced bus services.

The Didcot to Culham River Crossing includes a new 3.6km single carriageway road between the A4130 at the existing Collett roundabout junction in Didcot and the A415 at Culham. It will include a new bridge over the Appleford railway sidings and a new bridge over the River Thames. Segregated walking and cycling facilities will also be provided along the length of the scheme.

Councillor Liz Leffman, Oxfordshire County Council’s Cabinet Member for Highways Construction and Repair, said: “The Didcot to Culham River crossing will significantly reduce congestion in the area, and provide a safe route for walkers and cyclists. In particular, it will help relieve the congestion at the existing historic river crossings through Sutton Courtenay/Culham villages, and also at Clifton Hampden.

“These existing local bridges are old and not suitable for modern levels of traffic movement. They are often congested and subject to flooding in the winter months. This new crossing over the River Thames will help improve traffic flow, public transport journey times and reliability, and offer more resilience for public transport from flooding.

“The entire Didcot and surrounding areas major infrastructure scheme will give people more choice in how they travel, with improved conditions for active and sustainable kinds of travel which are better for everyone.”

Andrew Henry, GRAHAM Contracts Director, said: “It is fantastic to have partnered with Oxfordshire County Council once again on another essential civil engineering project in the area.

“The Didcot to Culham River crossing is a complex project, which is ideally suited to our expertise. It will involve a complete overhaul of the current infrastructure, which is no longer fit for purpose, to deliver vital improvement works that support an enhanced quality of living for residents.”

Enabling works, including site clearance, archaeology investigations and utility diversions began earlier this year, and early construction activities are underway. Construction is expected to last approximately two and a half years.

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