Line Locating Services

Our Electromagnetic (E.M.) utility line locating services provide accurate, non-destructive detection of underground utilities before excavation, drilling, trenching, or construction.

Using advanced signal induction technology, we trace buried utility lines safely and efficiently to help prevent costly damages, service disruptions, and safety hazards.

How E.M. Line Locating Works

E.M. locating works by transmitting an electromagnetic signal onto a conductive utility line and tracing its path underground.

We apply signal using several proven methods:

• Direct connection to exposed cable or tracer wire

• Clamp induction by placing a signal clamp around the cable

• Induction (blind sweeps) using a transmitter placed above ground when direct access is not available

Different frequencies are selected based on:

• Length of the utility run

• Soil conditions

• Congestion of underground utilities

• Type of utility being traced

Using the correct frequency ensures optimal signal clarity and accurate utility mapping, even in complex or high-density work
areas.

Utility Color Coding Standards

All located utilities are marked on-site using the following color codes:

• Red – Power

• Orange – Phone & Data

• Yellow – Gas

• Blue – Water

• Green – Sewer & Storm Drain

• Pink – Unknown / Miscellaneous

Radio & Passive Power Sweeps

After primary utility locates are completed, we perform radio frequency and passive power sweeps across the work area.

This process helps identify additional underground utilities that may:

• Have no visible access points

• Lack tracer wires

• Be undocumented or abandoned

• Not allow direct signal connection

This added layer of detection improves overall site safety and reduces risk.

Mapping & Reporting Options

All utility locates include a hand-drawn site map for documentation.

Upon request, we can also provide:

• High-accuracy GPS utility mapping

• Drone aerial imagery with utility overlays

• Digital CAD-compatible files

• Detailed post-processing reports

These enhanced mapping options are ideal for contractors, engineers, municipalities, and project managers requiring precise documentation.