Every construction project — whether a major pipeline installation or a simple afternoon of backyard excavation — starts with the same critical question: what’s buried down there?
Beneath almost every developed site in Canada lies a hidden network of pipes and cables carrying natural gas, electricity, water, telecommunications, and sewer services. Striking any one of them during excavation can mean costly delays, service outages, regulatory fines, or serious injury to workers on site.
Utility locating is the process of identifying and marking the position and depth of these buried assets before any ground disturbance begins. It transforms underground infrastructure from an unknown hazard into a manageable, mapped system.
How Does Utility Locating Work?
Modern utility locating uses electromagnetic (EM) technology. A transmitter applies a signal to a buried metallic pipe or cable — either by direct connection, inductive clamp, or induction — and a receiver above ground detects the signal field radiating from the target line. By reading signal strength, the technician can trace the line’s route, pinpoint its exact position, and estimate its depth.
Most locating systems operate across a range of selectable frequencies. Higher frequencies are better suited for difficult connections or detecting signal spread to adjacent lines. Lower frequencies penetrate deeper and travel farther along the target, making them ideal for long pipeline traces.
For non-metallic utilities such as plastic gas mains or PVC water pipes, a sonde (a small battery-powered transmitter) can be inserted into the pipe. The sonde broadcasts a signal from within, allowing the technician to trace the route of otherwise invisible infrastructure.
The Risks of Skipping a Locate
Statistics consistently show that the majority of utility strikes during excavation are preventable. In many cases, records existed — the problem was that no locate was performed, or an incomplete locate was relied upon without field verification.
A missed locate is not just a safety incident. It can trigger liability claims, project shutdowns, and regulatory investigations. In Ontario and across Canada, “Call Before You Dig” (Ontario One Call) requirements make utility notification a legal obligation. But notification is only the first step — professional field locating is what actually puts marks in the ground.
Why Choose Materials Lab for Your Utility Locating Needs?
Materials Lab’s field services includes professional buried utility locating across Alberta and beyond. Our team brings rigour to every locate — not just line marking, but documented, defensible results that support your project planning and regulatory compliance.
Contact materialslab to discuss your upcoming project.
📧 info@materialslab.ca
📞 587-594-5521