Leading provider of infrastructure services in North America

Subsurface Utility Engineering (SUE)

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Systematic Utility

SUE is the ideal process for carrying out systematic utility research to promote structurally efficient design and mitigate any associated risk. SUE is critical for both utility and construction projects as it is the perfect tool to establish the location of buried utilities and can present findings in a risk-based format.

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Tierra SUE Process & Quality

All Four Quality Levels of SUE

Tierra applies all four Quality Levels of SUE to ensure the integrity of information provided underground utilities at the project site.

Tierra collects all existing utility records, applying geophysical methods to determine the presence of subsurface utilities and then leveraging techniques such as Hydrovac excavation and ground penetrating radar (GPR) to verify their horizontal and vertical position.  Once captured, information is digitally mapped and delivered alongside a utility conflict matrix that makes it easy to evaluate and compare collected utility information with propsosed plans

SUE Level D
  • Project Coordination
  • Utility Research
  • Record Research
  • Organize Data
  • Reconcile Data
SUE Level B
  • Geophysical Investigation
  • Use of Geophysical Equipment
  • Detect utility existence
  • Interpret location
SUE Level C
  • Highly trained technicians
  • Observe ground features
  • Indicate buried utilities
  • Mapping
  • As-built creation
SUE Level A
  • Hydrovac daylighting
  • Conflict investigation
  • Expose utility
  • Verify the exact spot of utility

The Tierra Advantage

Tierra strives to provide the best possible services for all of its clients. With a highly trained staff and years of experience, Tierra does its best to ensure quality, safety and the highest level of professionalism.


At TIERRA we believe that vigilance, safety, and quality is of the utmost importance. We call this our ‘Continuous Quality Cycle’ system.

Team Safety

We ensures that all employees receive the best possible training for their work functions and ensure that such functions are carried out properly and competently.

Memberships And Certifications

Local management at Tierra has contributed in the development of industry-specific Best Practices and in the development of the ORCGA training curriculum.

Service Requests or Questions?

Our Tierra Team is Available to Answer Any Questions You Might Have

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