VolkerFitzpatrick’s Didcot Science Bridge: design and phasing notes for engineers
Reviewed by Joe Ashwell
First reported on The Construction Index
30 Second Briefing
VolkerFitzpatrick has been contracted by Oxfordshire County Council to deliver phases 1 and 2 of the £350m HIF1 scheme, including dualling the A4130 east of the A34 Milton Interchange and constructing the three-span Didcot Science Bridge over the existing A4130, the Great Western main line and Milton Road. The A4130 upgrade will repurpose the current carriageway using the southern ditch as a central reservation, with the existing lanes carrying eastbound traffic to Didcot and two new south-side lanes carrying westbound traffic to Milton Interchange. The new single carriageway bridge and link will run through the former Didcot A Power Station site to rejoin the A4130 near Purchas Road, with main construction due to start in spring and last about two years.
Technical Brief
- Three-span Didcot Science Bridge must maintain clearance over the Great Western main line and Milton Road.
- VolkerFitzpatrick’s package covers phases 1–2 of the £350m HIF1 programme, alongside John Graham Construction.
- John Graham’s phases 3–4 include the £38m Clifton Hampden bypass between A415 at Culham and B4015.
- Clifton Hampden bypass design incorporates a new roundabout near Culham Science Centre and Culham Rail Station.
- New link road alignment passes through the brownfield Didcot A Power Station site before rejoining the A4130.
- Enabling works already underway comprise site clearance, archaeological investigations and multiple utility diversions.
Our Take
VolkerFitzpatrick’s role on the Didcot Science Bridge adds to its recent UK public‑sector workload, such as the RAF Coningsby airfield upgrade, signalling that the contractor is consolidating a niche in complex, operationally constrained infrastructure schemes rather than greenfield highways alone.
At £350M for the wider Didcot and surrounding areas infrastructure project, Oxfordshire County Council is committing to a scale comparable with the larger schemes in our 723‑item infrastructure database, which typically triggers closer central‑government and treasury scrutiny on programme risk and value for money.
The interface with assets like the Great Western mainline railway and Culham Rail Station means construction sequencing and possession planning will likely be as critical to delivery as the three‑span bridge design itself, particularly given the two‑year main construction window indicated for the Didcot Science Bridge phase.
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.
Related Articles
Related Industries & Products
Construction
Quality control software for construction companies with material testing, batch tracking, and compliance management.
Mining
Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.
QCDB-io
Comprehensive quality control database for manufacturing, tunnelling, and civil construction with UCS testing, PSD analysis, and grout mix design management.