M6 J11-12 Filter Drain Remediation

The agreed solution was a two-stage sensitive cut of the vegetation, and increased requirements of vacuum extraction within areas located behind the VRS. The adaptable approach would react to emerging issues, providing sufficient detail to support its swift remediation.

Up to three vac-ex units were used in tandem by the Carnell Filter Drain Recycling team. The outputs were 10km of drainage remediated over a six-week period. This included the removal of overburden (vegetation build up on top of the filter drain) as well as several CCTV drainage surveys of the pipework, often carried out at short notice.

The Carnell team epitomised the company value of being responsive as the work area would frequently change depending on site findings and road space availability. With plenty of unknowns on site, ground surveys were carried out immediately within each new traffic management closure. This improved asset knowledge guided the next steps when reporting back to the client the following morning.

Collaboration between all parties was then key to delivering a safe, effective and efficient solution that was completed within the client’s programme.