Carnell collaborated with National Highways to undertake in-situ filter drain refurbishment, in Area 12.
A number of flooding hot-spots were identified on the network, and after teaming up with Carnell, a scheme was developed and passed through the Value Management process.
Carnell undertook the remediation works on the M180 between J1 & J4, along sections of both verges and the central reservation. This comprised the removal of surface vegetation and the recycling of the combined surface and groundwater filter drain. With the asset returned to its optimum performance, the filter media was also reinforced using Carnell’s TRL approved StableDrain solution.
To minimise the network occupancy, two StoneMaster units were used in tandem, halving the overall duration of the schemes. In total the two crews covered a distance of 6,800 linear metres which resulted in over 11,800 tonnes of aggregate being recycled and immediately reinstated to the drain.
This provided an estimated reduction of more than 1300 HGV movements on the network and a Carbon saving of over 70 tonnes.