Know what's belowbefore you dig, cut, or core.
Underground Services Locators is Ottawa's premiere damage-prevention partner — utility locating, GPR concrete scanning, and subsurface utility engineering, executed with comprehensive training, thorough planning, and effective management.
- Fully insured
- Worldwide public liability
- Fast turnaround
- Ottawa & Eastern Ontario
- One point of contact
- Public + private locates
- 32+
- Years of experience
- Ottawa
- Head office, serving Eastern Ontario
- 10+
- Utility owners coordinated per job
- 100%
- Projects insured worldwide
We bring the technical knowledge & experience.
USL-1 is a leading provider of underground utility locating and concrete scanning services since 1994. Safety is our top priority and we take measures to ensure the health and well-being of our employees, clients, and the communities around our operations.
Our projects are executed with excellence through comprehensive training, thorough planning, and effective management — and we are fully insured for public liability worldwide.
Every layer of damage prevention, under one roof.
From pre-excavation locates to GPR concrete scanning to full subsurface utility engineering — we own the picture of what's underground so your team can design and build with confidence.
Utility Locates
Utility location is the procedure of discovering, marking and labeling utilities that are located underground — hydro, natural gas, cables, stop and street lights, water mains, and more.
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Concrete Scanning
USL-1 uses Ground Penetrating Radar (GPR) to scan concrete slabs, walls, ceilings and beams for embedded objects — rebar, post-tension cables, conduits, and voids — before you cut, drill, or core.
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Subsurface Utility Engineering
Subsurface Utility Engineering (SUE) is the process of identifying, mapping, and evaluating underground infrastructure — pipelines, cables, and conduits — so designers and contractors can plan around what's really there.
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Surveying
Site-ready surveying that pairs with our locate and scanning services — topographic surveys, construction layout, grade verification, and as-built deliverables that fold directly into your civil and structural drawings.
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Three reasons Ottawa keeps calling us first.
Honest and dependable
Working with our trusted partners, we offer end-to-end services. Our goal is to be a single point of contact — so you reduce risk and never chase answers.
Fully certified and insured
Latest industry training, multiple government security clearances, and worldwide public-liability coverage. Paperwork ready before our techs roll up.
Proven track record
Unparalleled delivery on mission-critical projects of every size, across every industry — from residential renovations to provincial infrastructure.
Associated with USL-1
Ready when you are
Have a dig, cut, or core coming up?
Get the complete picture of what's below — public and private locates, GPR scanning, or a full ASCE 38-aligned SUE investigation. Tell us the scope and we'll come back with timing and a quote.