Ipswich Chord Bridge 404

The Ipswich Chord is a new 1.2km double track railway providing essential connection between the East Suffolk Line and the Great Eastern Line. The Chord forms part of the strategic freight network between Ipswich and Peterborough. Spencer Group was commissioned by Network Rail for the design and construction phase of the project.

Key Project Details

Client Network Rail
Duration 21 months
Location Ipswich, Suffolk
Contract Form ICE Conditions of Contract Target Cost Version, First Edition

Project Scope

The team was faced with access difficulties to a site hemmed in by rail , river and urban development; and in successfully gaining the support of local landowners and users for the permanent and temporary work. Working alongside a live railway required a significant disruptive possession regime including a 5-day blockade over Christmas 2013. This required an intricate plan of staged construction and testing to maintain operational performance without comprising site safety. Spencer Group enjoyed a full collaborative relationship with Network Rail and also formed an effective alliance with lead designer, Arup. This created an ideal platform for finding joint solutions to problems on-site, resolving commercial issues and managing risk.

The project involved

4 new bridges
2 new embankments


Bridge 404, a two-track rail over water bridge was replaced during the Christmas blockade, one of four bridges in this project. This was achieved in just 52 hours through use of precast units.
Despite the extreme complexities of the project and some of the worst winter storms on record, the work was completed on time and to budget with no complaints. The Ipswich Chord will cut journey times by at least 30 minutes and the increased capacity on the railway will mean 750,00 fewer lorries on the road. This will be huge relief for commuters on the congested A14 and will make a significant contribution to meeting carbon reduction targets.

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The project involved

413m retaining wall
2.4km of new track