Create Accurate As-Builts of Underground Infrastructure to optimize project efficiency

Subsurface Utility Engineering (S.U.E.) involves trained professionals who use state of the art equipment and technology including ground penetrating radar and electromagnetic equipment, to non-destructively locate and map the existing underground infrastructure. Information gathered on the subsurface utilities located (utility nature, depth, location, orientation, material and dimensions) during the initial field survey phase are recorded and accurately georeferenced using GPS and total station data capture.

Whether the work involves trenching, excavating, or drilling, implementing SUE is key to ensure the successful outcome of a project in relation to the management of risks associated with the underground utility infrastructure. The locate work performed by our technicians is governed by a set of industry guidelines and standards that provides a benchmark to show the integrity and quality of utility data collected.


The advantages of Subsurface Utility Engineering are HUGE in the construction industry. Having this valuable information on demand is critical for the pre-design phase of any project involving ground disturbance. Not only does it aid in project safety by avoiding risk resulting from damaged underground utilities, it also mitigates costs associated with utility repair, unanticipated development redesign, project delays, and various other unforeseen conflicts.

The Process

A SUE project is classified by four quality levels with the objective to improve the reliability of the data presented. The highest quality level (quality level A) involves day lighting the utility once located to visually confirm the details of the structure as well as to allow for the most accurate horizontal and vertical positional measurements to be collected. This level of accuracy is predominantly required where conflicts arise with the proposed development alignment. Lower levels of SUE (quality levels B, C and D) are more suited for areas surrounding the projected design where underground infrastructure does not interfere with the ground disturbance. Locate results are then surveyed and drafted to produce a scaled drawing showing the horizontal and vertical location of the underground infrastructure along with additional details and characteristics of the utilities. The finished product of SUE is then reviewed and approved by a professional engineer.

3D Manhole Investigation

3D Manhole Example