STONEmaster

Sustainable In-Situ Filter Drain Refurbishment

STONEmaster is a unique in-situ method for removing the sediment within roadside filter drains. The patented process returns the filter drain media to its optimum performance condition, improving road safety and pavement integrity by reducing flooding events and occasions of standing water on the carriageway.

The STONEmaster units are custom built, self-contained vehicles that enables us to meet all site safety requirements. They can be operated during the day or night in virtually all weather conditions and in most carriageway locations without the need for road closures.

The process is sustainable in that it recycles existing material and minimises the volume of additional material that has to be quarried and transported to site, thus significantly reducing the number of vehicle movements to and from site. Two units can work in the same TM closure for even greater savings and efficiencies.

By adopting the STONEmaster process to refurbish your filter drains, greenhouse carbon emissions are reduced by more than 6 tonnes per 1,000 metres in comparison with traditional replacement techniques – the equivalent emissions of a car journey of 6,000 miles.

Since being developed in 2002, Carnell’s 6 STONEmaster machines have operated in all the Highways England Areas and Scottish Operating Units, Welsh TRAs and most DBFO contracts. A number of Local Authorities have also utilised the innovative process.

The benefits

Filter drain refurbishment improves drainage of the carriageway and sub-layers.
Quality – A ‘cleaner than quarried’ product returned to drain.
Reducing Cost – 60% less than traditional dig-out and replace
Minimising Disruption – Reduces HGV movements
Increasing Safety – Reducing movements in and out of TM
Environmental Impact – Minimal import from quarries and loads to landfill
Preliminary surveys give accurate indication of imported material required and waste criteria.

Typical uses

Roadside filter drains in the verge and central reservation.
Reactive – Implemented where carriageway flooding has been observed.
Planned – In advance of visible issues where surveys show poor filter drain condition.

How does it compare?

250

METRES PER SHIFT

A single STONEmaster machine will recycle 250 metres of filter drain per shift.

60%

COST SAVING

With far fewer vehicle movements and raw materials required, STONEmaster is more cost-effective than dig-out and replace

6X

STONEmaster UNITS

Multiple units means we can mobilise without delay, whatever the demand. Using 2 or 3 machines in the same closure gives even greater savings.

400%

REDUCTION IN HGV MOVEMENTS

Less stone brought to and removed from site means fewer HGV journeys, CO2 emissions and vehicle movements in and out of TM enclosures.

6t

LESS CARBON EMISSIONS PER KM

Significant carbon savings compared to dig-out and replace when accounting for emissions produced during transport and quarrying

3X

LESS ROADWORKER EXPOSURE

Fewer movements in and out of TM leads to a reduction in the risk to the road user