Metallic Pipe & Cable Locating Across BC
Trace buried metallic water mains, gas lines and cables with electromagnetic precision before you dig
About This Service
Electromagnetic (EM) line locating is the fastest, most reliable way to trace conductive buried infrastructure — metallic water mains, steel and copper gas lines, electrical cables and tracer-wired services. A transmitter applies a precise signal frequency to the target line; a receiver above ground traces the signal along its route, marking position and depth in real time. EM locating is the foundation of every safe excavation in British Columbia and the first tool we deploy on any subsurface survey, paired with GPR to capture the non-metallic lines EM cannot see.
How It Works
- 1
A transmitter is connected directly to the pipe or cable (direct connection) or clamped around it (inductive coupling) to apply a known signal frequency.
- 2
Where no access point exists, the transmitter induces a signal into the ground over the suspected line.
- 3
A handheld receiver tuned to the same frequency detects the electromagnetic field radiating from the energised line.
- 4
The technician walks the route, tracing peak signal response to map the exact horizontal position.
- 5
Depth is measured electromagnetically at intervals and the line is marked on the surface in BC One Call colour codes.
When It's Used
What You Receive
- Surface marking of every located line in standard colour codes
- Electromagnetic depth measurements at intervals along the route
- Frequency and signal-strength notes confirming locate confidence
- Combined EM + GPR plan where non-metallic lines are also present
- Sketch or CAD deliverable on request
Pipe & Cable Locating — BC Locations
Available across all of British Columbia.
EM Scan & Line Locating by BC City
Other EM Locating Services
Live Power & HV Cable Detection
Power Cable Detection
Telecom & Fibre-Optic Conduit Locating
Telecom & Fibre Locating
Sonde Locating for Non-Metallic Pipe & Drains
Sonde & Drain Locating
Utility Depth Measurement & Cable Fault Location
Depth & Fault Location
Pre-Excavation EM Utility Survey
Pre-Excavation Survey
Need non-metallic pipe, concrete or void imaging too? Explore GPR scanning →
Frequently asked questions
What's the difference between EM locating and GPR?
EM locating traces conductive lines — metal pipe, power and telecom — by applying or inducing an electrical signal that the line carries. GPR images everything, including non-conductive PVC, concrete and voids, by reflecting radio pulses. We use both together for a complete subsurface picture.
Can you locate plastic pipe with EM?
Only if it carries a tracer wire or has a metallic component. Bare PVC, PE and HDPE have no conductive path and are invisible to EM — that's why we pair EM with GPR, which images non-metallic pipe directly.
How accurate is EM depth measurement?
EM depth is typically accurate to within ±10% under good conditions. Congested utility corridors and distorted fields reduce accuracy; we note confidence levels and recommend potholing to confirm critical depths.
Pipe & Cable Locating Across British Columbia
LeakInspections.ca is a division of Anyleak.ca and part of the Leak.ca family — BC's subsurface locating and leak detection specialists since 1999.