Crown Plus is proud to have concluded in our delivery of approximately £3milion in overall scheme savings on the Eurovia M11 J7-8 highways drainage remediation scheme through proposing and operating non-intrusive, smarter working solutions, in addition to providing reduced safety risks for highway operatives and reduced COemissions.

The 18-month scheme comprised of drainage remediations to the M11, incorporating both the northbound and southbound carriageways, central reserve and verges between J7 and J8. Previous surveys had identified a significant quantity of defects requiring remediation to restore the highway drainage to acceptably safe driving conditions.

As part of the ECI process we reviewed the surveys and provided new working methodology to the client, as an alternative to the intrusive repair’s methods proposed.

Defects included pipe collapses, presence of settled deposits and other obstructions causing up to 90% cross sectional area loss, broken pipes, fractures, cracks, and open joints, with rehabilitation of the pipelines essential for the drainage network to restore the free flow of surface water within the system and to ensure that surface and sub-surface water is routed away from the road construction.

A reduction in the construction programme of 144 shifts was enabled through utilising CIPP and UV lining techniques. The scheme had previously planned to have been carried out during permanent road closures with the use of VarioGuard, however the Crown Plus methodology meant the following was minimised, producing millions of pounds in financial savings to the client.

Impact on road users

Cost reduction in labour and plant

Reduction of CO₂ emissions

Reduced operational hours

Reduced risk for operatives working on the roads

Removed the need to import new aggregate and concrete

Gary Price, Operations Director said “We are especially proud of our involvement in the M11 project as we were able to fully demonstrate the benefit of our ‘smarter working solutions’. When reviewing the existing scheme information during the ECI stage of the project we identified that we could convert a large number of the intrusive dig down repairs to non-intrusive CIPP works. This approach provided our client with approximately £3 million pounds worth of savings across the scheme as a whole. This coupled with the major environmental benefits we enabled certainly makes it a scheme to be proud of”.