Cambridgeshire County Council has confirmed that major progress has been made on repair work at the King’s Dyke embankment on the A605 Ralph Butcher Causeway near Whittlesey, with more than 680 soil nails now installed as part of the extensive ground stabilisation programme.
In its latest update, published on 22 October, the council said the soil nailing operation on the main embankment is complete, with work now focused on two adjoining areas.
Crews are also continuing to install drainage pipes and the steel reinforcement that will support the sprayed concrete facing — the crucial outer layer designed to hold the embankment firm for decades to come.
The soil nailing and concrete reinforcement phases are key to ensuring the long-term stability of the embankment.
Once the soil nailing and sprayed concrete phases are complete, the embankment will undergo a three-month settlement period before final resurfacing and the full reopening of both lanes — expected in early 2026.
From cracks to construction
The latest milestone comes more than a year after cracks first appeared in the road surface of the Ralph Butcher Causeway, which forms part of the King’s Dyke bridge link between Whittlesey and Peterborough.
An emergency lane closure was introduced in July 2024 after engineers detected surface cracking and movement along the westbound carriageway. The closure was kept in place to protect road users and to allow for detailed investigations.
Subsequent testing, modelling, and ground surveys revealed that the problem lay not with the bridge itself, but with the reinforced earth embankment supporting the road between the new bridge and the subway. Engineers concluded that ground settlement in the soft fenland soils had caused instability.
In June 2025, the council approved a detailed remedial plan developed by contractor Jones Bros Civil Engineering, the same company that built the original bridge. The £32 million structure opened in 2022 after decades of campaigning and years of construction setbacks.
Soil nailing – a Fenland fix
The approved repair involves installing hundreds of steel soil nails deep into the embankment to anchor and strengthen it. These rods, driven several metres into the ground, effectively “stitch” the soil together to prevent further slippage. Once in place, the nails are encased in sprayed concrete, which forms a tough retaining layer across the embankment face.
The remedial works began on 7 July 2025, with a 22-week programme scheduled to run until December. The project has remained within its planned timeframe, with regular progress updates from the county council confirming milestones:
- July–August: Site setup, vegetation clearance, and initial soil nail testing.
- August–September: Over 500 nails installed and preparation for sprayed concrete works.
- October–October: Drainage systems and reinforcement installation underway.
Throughout the works, the existing single-lane closure has remained in place, controlled by traffic lights, to allow construction to continue safely without fully closing the route.
The council has reiterated that a full road closure was not required, despite the scale of the engineering activity, and that the costs of the repairs are being fully met by the contractor, not taxpayers.
“We have not yet accepted ownership of the bridge from the contractor,” the council noted in its June statement. “Jones Bros are responsible for addressing the issue and ensuring long-term stability before formal handover.”
A bridge with a long history
The King’s Dyke crossing — officially named the Ralph Butcher Causeway — was hailed as a transformative project when it opened in July 2022, eliminating one of the most notorious traffic bottlenecks in Cambridgeshire.
For decades, drivers endured delays of up to an hour at the former level crossing, where gates closed around 200 times a day for passing trains. Persistent lobbying from residents and campaigners, including former Fenland councillor Ralph Butcher, eventually led to approval of the bridge project after years of funding wrangles and design challenges.
Construction finally began after Jones Bros took over from the previous contractor, Kier, whose costs had escalated. The finished scheme included a new 80-metre bridge spanning the Peterborough–Ely railway, two roundabouts, and improved access routes for Whittlesey’s growing population and industrial estates.
Community frustration and future outlook
While the bridge initially improved travel times and safety, the ongoing lane restrictions have been a major source of frustration for residents and commuters. Some have described the situation as “disappointing” given the bridge’s recent opening.
Local councillors have urged patience, emphasising that the repairs are necessary to ensure long-term stability. Fenland Council leader Cllr Chris Boden has called for continued accountability from contractors, adding that the works will ultimately “deliver a permanent solution that protects public investment.”
Traffic monitoring continues daily, with engineers inspecting the embankment and managing the lane closure to keep disruption to a minimum.
For the latest updates on the King’s Dyke repair programme, visit: www.cambridgeshire.gov.uk/kingsdyke
Follow live traffic updates on X: @Cambs_Traffic
