Non Intrusive Trenching Survey delivered in the North West

Instead of digging trial excavations or slit trenches to confirm what’s underground, Powers & Tiltman can create a ‘cross section’ of a pavement or carriageway to provide a precise plan or 3D model showing the relationship between individual services and the surrounding environment, without putting a spade in the ground.

We combine state of the art technology with extensive knowledge to establish the accurate positions and depths of buried services that exist beneath a site which can then be clearly marked on the ground (depending on the sensitivity of your site).

This facility is often used for;

  • Maintenance programs
  • Installation of additional services
  • Safe areas for foundation installations
  • Traffic relief schemes

A chat with one of our experts will only take a few minutes but could prove an enormous cost saving in the long run.

Frequently Asked Questions:

  1. What sort of equipment is used for non-intrusive trenching surveys?

    We use EM + GPR technology:

    EM (Electro Magnetic) technology traces live services or known services that a low voltage electric pulse can be passed along and traced from the surface.

    GPR (Ground Penetration Radar) once all known services have been traced using EM, GPR is then used to scan the site for any services which are unable to be located by EM e.g. plastic pipes or unknown services.

  2. Do utilities surveys detect everything?

    No underground utilities will trace most services on site using a combination of service records, EM + GPR. The majority of services will be traced.  There are limitations however. Services which are too deep or too small for GPR to get a clear reading and are not shown on statutory record plans may not be detected.

  3. Can you tell how deep the services are?

    Yes the GPR + EM equipment lets us know the depth of the service being traced.