ASI Group

Tunnel & Pipeline Inspections

Remote Inspections provide a safer and cost-effective alternative to dewatering tunnels and pipelines

The use of remote systems is an enabling technology that provides an inspection solution where there previously was none.

Inspection of tunnels and pipelines can present challenges. Tunnels and pipelines are often hidden from sight, have limited access and can be several kilometers (miles) long. De-watering tunnels and pipelines for walk-through inspection is not always possible and when attempted, can be dangerous and costly. In some cases, the inspection of the tunnel or pipeline cannot be accomplished as some facilities were not built with the intent of ever isolating or dewatering them.  Leaving a tunnel or pipeline in a watered state during inspection eliminates the time required to safely dewater and eliminate water waste.

ASI understands that time is of the essence when such assets are taken out of service and commits sufficient resources to provide 24-hour continuous operations for as long as the client requires. Remotely Operated Vehicles (ROV) are controlled from the surface and data from the vehicle sensors are displayed in real-time and recorded for future review. This unique capability places ASI as the world leader for long tunnel inspection work.


Download a project reference to learn more about our tunnel inspection capabilities

For over 30 years ASI has solved the world’s toughest underwater challenges. We provide clients with experienced personnel, tailored solutions, accurate data and comprehensive reports needed to make critical, timely and cost-effective decisions regarding underwater infrastructure remediation, maintenance and repair. Our tunnel experience optimizes the combination of equipment and inspection protocols to satisfy project goals efficiently and with consistent quality.


Types of inspections available:

  • 3D mapping for condition assessment
  • Leak detection
  • Tunnel profiling

Data collection technologies:

  • HD video
  • HD images
  • Photogrammetry
  • Multibeam sonar
  • Imaging sonar
  • Side-scan sonar
  • Profiling sonar
  • Underwater laser
  • Virtual reality (for tunnel inspections)

Reporting Deliverables include:

  • Measurable and comparable data
  • Identification of areas of interest
  • Accurate representation of asset
  • Full synopsis of the facility and methods of inspection
  • XYZ data points with ability to export to CAD
  • Quality backup data
  • Reporting
  • Sonar mosaics
  • Volumetric assessments
  • Raw/edited inspection video

Contact us to learn more about our services

+1 905-643-3283
For immediate assistance, please contact our Head Office at the number above.