Drainage

Our range of drainage services reflect Crown Higwhays continued commitment to providing innovative solutions along with specialised process development.

All our works are undertaken by our trained and qualified directly employed workforce who understand the need to ensure that works are undertaken on time together with a right first time attitude.

Identification and Verification

Asset Inventory Surveys including below ground network connectivity surveys & asset geo-referencing
CCTV condition surveys to identify pipe degradation, silt build up, root ingress etc
Above ground topographical Surveys
Below ground asset surveys and referencing using latest GPR technology
Identification of flooding hotspots
Flow Monitoring
Identification and investigation of soak-away and outfalls
Infiltration testing
Ecology and Habitat surveys
Invasive weed surveys
Intrusive ground investigations
Factual and Interpretive reporting of site investigation works
Production of waste and material management plans

Structural Refurbishment and repair

Emergency call out for reseating ironwork
Emergency spill response
Construction of pollution prevention chambers
Root Cutting
Structural re-lining
High pressure jetting
Manhole refurbishment
Manhole and catchpit cleaning including refurbishment
Concrete patch repairs
Full and part length replacements
Emergency over-pumping
Drainage ditch clearance and re-profiling
Vegetation clearance
Invasive weed identification and treatment
Tree surveys

Additionally, Crown Highways have recently announced delivery of a filter drain recycling machine.

The CR Series 500  filter drain recycling machine has been developed following a 6 month development process and is capable of recycling upto 90t of filter drain media per hour. The process is a cost effective and environmentally friendly method of recycling filter drains.  The benefits of adopting this process include:

  • Reduction in new quarried materials being taken to site.
  • Reduction in waste materials being taken to landfill.
  • Reduced HGV movements in and out of lane closures.

The machine has a number of controls that allows the operator to change the speed of the process based on the volume of silt contained within the filter drain itself.  This ensures the drainage media placed directly back in to service meets the grading specification as stated in Table 5/5 of the SHW (MCHW 1) with all waste products being removed off site. The process transforms the non-compliant drainage system to its original condition thus ensuring the pavement does not deteriorate prematurely due to water related deterioration.