622469 M20 Thurnham Lane and Water Lane N&S

The M20 Thurnham Lane North and Water Lane North & South structures are undergoing partial deck refurbishment, which is scheduled for September 2025.

For all three bridge structures, the Preferred Option to address the stated network need and based on a Whole Life Costing of viable options, is Option 2; to replace the West expansion joint from stringcourse to stringcourse with Part 3 Flexible Plug Joint. This requires a surfacing inlay with HRA the full length of each bridge and 15m beyond each joint in order to accept the replacement joint.

On all three structures, to preserve the existing East Joint, and to maintain the running surface over the joint, transition strips using flexible plug joint material are to be laid to the back of the joint rails. For each bridge, the longitudinal joint on the structure is to be raked out and replaced with polysulphide sealant. This approach ensures a consistent solution across all three bridge structures.