Electromagnetic Locating

Through the use of electromagnetic detection equipment, CMH Underground can confidently and accurately locate and map buried facilities. From electrical and communication cables to gas lines, water mains and sanitary lines, if it’s hidden from sight trust CMH Underground to find it.

Sondes and Traceable Flexrods

Not all buried utilities conduct electronic current. When it comes to plastic conduits or asbestos concrete pipes CMH Underground employs remote transmitters which are inserted into the pipe and then tracked from above the ground. Our tools accurately locate the buried lines quickly and safely.

Pipe Camera Inspection

As a cost-effective and efficient means of evaluating the interior of a conduit, sewer or drain pipe nothing beats a camera. Blockages or damaged areas can be easily seen and subsequently located from the surface, pinpointing exactly where repair excavation needs to take place. Pipe video inspection can easily uncover traditionally hidden issues such as:

  • Broken, cracked or collapsing pipe
  • Offset pipe joint (as may be caused by soil shifting)
  • Grease or foreign object blockage
  • Corrosion
  • Bellied pipe
  • Leaking joints
  • Root infiltration
  • Off-grade pipe

Analysis of the inspection video collected is conducted on-site by the CMH Underground camera operator, saving both time and money. Additionally, the inspection footage is recorded and saved for later, allowing for more detailed review if necessary and so video and/or still images recorded during the inspection can be incorporated into a report and provided to the client by USB drive or via email.

Ground Penetrating Radar (GPR)

Experts in the use of GPR, CMH Underground technicians can accurately determine location and depth of utilities and structures. Things like underground storage tanks, concrete vaults and pipes, non-electro conductive piping and more. GPR can also be used to assess changes in material properties, making it easier to identify areas of bedrock and buried debris (eg. wood, concrete and scrap metal). In some cases, CMH Underground technicians have even been called on to locate human burial grounds and scan for ordinances in former military installations. GPR technology is a valuable, useful tool when employed by the skilled technicians in Underground Utility Locating Services.

Concrete Scanning

Using a high frequency GPR antenna, CMH Underground technicians can scan concrete floors, walls and ceilings to accurately locate conduit, electrical and data lines, rebar, heating pipes and other features buried within or located immediately below the concrete slab.

Void Detection

Sometimes it can be just as hard to find something that isn’t there vs. what actually is. From water line ruptures to natural grade settling, CMH Underground technicians have extensive experience identifying the voids that can sometimes be left beneath concrete slabs or asphalt. This can allow for targeted repair or interior grade correction before more difficult – and potentially expensive – issues can arise later.

Mapping Services

“By taking the required steps at the preliminary stages of large scale projects our clients are able to mitigate any potential conflicts with any existing services on site.”

Sample Map - Mapping ServicesIf you need a fully comprehensive 2-D or 3-D model of the utilities that may cause conflict in design or construction then CMH has the solutions. We take the worry of working around underground utilities away from you, the client, and provide you with the confidence to plan, design and manage underground utilities.

Our utility mapping service provides a complete overview of your site’s utility infrastructure. Pinpointing the exact location of your utilities improves industry compliance and reduces health and safety risks. Utilities that are not identified within the design stage of a project can have a huge impact during construction. Understanding the exact position and having reliable survey data can reduce the risk of utility strikes, downtime to the project and injury due to unknown utilities been struck or damaged. Redesigning a project during construction due to unknown utilities clashing with design can be very costly and avoided if a utility survey is conducted in the planning stage. Having a detailed infrastructure map is an essential part of an emergency preparedness program, and provides vital information that can save lives in the event of an emergency or natural disaster.

CMH employs the latest software which enables us to collect, analyse data and produce deliverables available in AutoCAD and google earth, including data for 3 D visualization.

The information is presented in a simple and comprehensive fashion, providing an infrastructure map that is a useful tool to Engineers, Planners, Facility Managers and excavation contractors.