Drainage surveys

We undertake a range of drainage and sewerage related asset investigations, using qualified staff and provide where necessary fully equipped and trained including confined space teams.  Our experience includes the investigation of pollution incidents, ranging from the identification of cross connections whereby sewage or industry process water is discharging into surface water drainage networks and watercourses, full drainage asset mapping for industrial, commercial and redevelopment sites, drainage area and impermeability studies.


Amethyst Surveys is able to undertake specialist surveys to produce digital 'as built drawings' for existing structures such as CSO's  Pumping Stations and Culverts, we also carry out manhole asset surveys to industry STC25 standards providing critical information such as cover levels, chamber sizes, pipe details including; depths, materials, diameter and validated connectivity. Our range of services includes:

  • Manholes asset surveys (STC25) and confined space entry
  • Asset mapping
  • Drainage area studies
  • Highway drainage surveys
  • Pollution surveys, drain tracing and dye testing
  • Catchment and threshold surveys
  • Drainage asset surveys
  • Infiltration studies