Subsurface Utility Engineering SUE

We’ve been carrying out SUE projects since before it was a recognized practice in Ontario. Our tried and tested project methodology is based on decades of progressive experience in project planning and coordination.

Establishing the location of buried utilities within a project area is critical to developing options for construction, and managing risk related to utility coordination, utility accommodation and utility relocation. That’s where Subsurface Utility Engineering (SUE) comes in.

We used to rely on disparate data to gain an understanding of subsurface assets. Whenever a change would occur, the area would be re-surveyed and data would be stored in various formats. By applying Subsurface Utility Engineering, we’ve created a database of high quality data that can be used by future contractors for years to come.

Florin Doru Merauta, Senior Project EngineerHATCH

SUE is an engineering practice governed by CI/ASCE 38-02 Standard Guideline for the Collection and Depiction of Existing Subsurface Utility Data, that provides a framework for evaluating the integrity of data based on four Quality Levels (Quality Levels D, C, B & A), dramatically improving information reliability. multiVIEW Locates has been carrying out Subsurface Utility Engineering investigations for almost three decades, since before it was a recognized practice in Ontario.

How Does Subsurface Utility Engineering work?

The process involves collecting existing utility records, applying geophysical methods to determine the presence of subsurface utilities and then leveraging techniques such as Vacuum Excavation and Ground Penetrating Radar (GPR) to verify their horizontal and vertical position. Even non-toneable underground assets including PVC or concrete pipes can be located.

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 proposed plans.

Subsurface Utility Engineering (SUE) is a process that applies four Quality Levels to gather precise information on underground utilities within a project site.  This information reduces surprises at later stages of a project related to utility relocation and coordination.

Subsurface Utility Engineering (SUE) process

As part of our SUE services, multiVIEW can inspect and evaluate the internal conditions of sanitary sewers and residential service lines while capturing images in real-time. We’ll zoom in on anomalies, navigate around bends, and inspect lateral services. Whether it’s a crack, root obstruction, cross bore, break or other issue, we’ll identify the problem quickly. Just a few of the things that we’re able to inspect and assess include: inflow and infiltration performance, blockages and accumulation of solids, structural defects in pipes and maintenance holes including cracks, breaks, sags, internal corrosion and leak areas, misplaced line valves, undersized pipes, drainage issues, changes to the pipes pre or post construction, potentially hazardous intersecting utilities.

When should SUE be applied?

SUE can be applied anytime information regarding underground utilities is required and the scope can vary greatly. It’s an integral part of the engineering design phase for capital works projects, allowing stakeholders to avoid unexpected conflicts later on in the project. SUE is also leveraged to assist with asset management, supplying accurate information to project owners with outdated or missing information on their underground assets.

SUE is most effective at minimizing project risk when Quality Levels D, C and B are carried out as an integrated program. Quality Level A investigations are required when depth data must be obtained to achieve project goals.

Our team of CAD experts consolidate all collected field data to create high quality drawings that are CI/ASCE 38-02 compliant and customized to conform to project specifications.

Subsurface Utility Engineering CAD map

By incorporating SUE into your project, you can:

  • Reduce delays and costs associated with utility relocation or project redesign
  • Enhance safety and reduce the risk of damaging utilities
  • Effectively design around existing utilities as necessary
  • Decrease service disruptions
  • Achieve an up-to-date, consolidated record of subsurface utilities within your project area(s)

Subsurface Utility Engineering

The multiVIEW Advantage


A highly qualified team of professionals

We’re authorized by the Association of Professional Engineers of Ontario (PEO) in addition to the Association of Professional Geoscientists of Ontario (APGO). We offer P.Eng and P.Geo oversight on all project processes and deliverables.


Tried and tested project methodology

Our project methodology is based on almost 30 years of experience in project planning and coordination. A focus on QA/QC ensures timely delivery, completeness of in-field area coverage and the production of high quality visuals and reports.


Self-performance capabilities

We’re able to self-perform all four SUE quality levels including QL-A “daylighting.” Minimizing or eliminating the need to manage subcontractors decreases risk and the possibility of project delays.


An investment in continuous training

Our highly trained technicians undergo various levels of training including ORCGA Damage Prevention Technician (DPT); Certified Project Management; Confined Space Entry (CSE); TTC Rulebook (3rd rail) and Electrical Safety Authority (ESA).

As your partner in Utility Damage Prevention and Inspection, we’ve defined core values that drive our operations and form the basis of everything we do.

30 years industry experience

We’ve achieved a unique position in the marketplace based on decades of experience, which allows us to provide added value to our customers.

Fast flexible mobilization

Our strategic approach to resourcing fosters scalability, flexibility and rapid response times. We’re here to support you 24/7, and no project is too complex.

Dedicated to training & safety

We foster a culture of continuous improvement through comprehensive internal and external training. Our Health & Safety culture is backed by our HS&E Manual.

Commitment to quality

We’re guided by our Quality Management System (QMS) and our team of experts executes all processes with the highest regard for quality.

Qualified, dedicated partners in Damage Prevention.

A full suite of Utility Locating services backed by a focus on Safety, Quality and Customer Excellence.