Underground Electric Distribution Easements

Underground electric distribution has become more common over the past few decades. New subdivisions typically require it. Some utilities are converting existing overhead lines to underground in areas prone to storm damage or where local governments want to improve aesthetics. When a utility buries distribution lines under your land, the easement looks different from an overhead corridor — but it is still permanent, and the restrictions can outlast the original installation by decades.

What gets buried

The infrastructure that goes underground includes:

Primary cables carrying distribution voltage (typically 4kV to 35kV) in insulated conduit or direct-buried configuration. These are the main feeders that serve a neighborhood or rural area.

Secondary cables delivering lower-voltage service from a pad-mounted transformer to individual meters. These typically run in conduit from the transformer to a junction box or directly to the meter base.

Junction boxes and vaults at points where cables join, branch, or transition between systems. These are below-grade structures with surface access covers, usually in the easement corridor.

Pad-mounted transformers are the green metal cabinets you see in yards and parking lots. They sit on the surface, within the easement corridor, and require clearance and access on all sides.

Why utilities choose underground

Cost and complexity make overhead lines cheaper to build in most situations. Underground is chosen for specific reasons:

Storm resilience is the most common driver. Areas subject to ice storms, hurricanes, or high winds see significantly fewer outages with underground lines.

Aesthetic and regulatory requirements push underground installation in new subdivisions, historic districts, and many urban areas.

In some cases, topography or existing development makes overhead construction impractical.

Typical easement widths

Underground distribution easements are generally narrower than overhead corridors, often 10 to 15 feet wide — sometimes less in dense developments. However, additional clearance space is typically required around pad-mounted transformers and vault access points.

Even a narrow easement can affect fencing, landscaping, and grading plans if it's not carefully considered. The transformer pad locations, in particular, create permanent above-ground structures within the easement area.

Trenching and surface restoration

Installation requires open-cut trenching or directional boring, both of which disturb the surface. Trenching involves excavating a trench, laying cable or conduit, and backfilling. Boring involves drilling underground without removing the surface, used under roads, driveways, and sensitive areas.

The easement document should address surface restoration. Good agreements specify topsoil replacement, compaction standards, and requirements to restore drainage patterns. If restoration standards aren't included, you may find yourself dealing with settled backfill, drainage problems, or damaged tile lines with no clear obligation for the utility to fix them.

Long-term considerations

Underground lines are harder and more expensive to repair than overhead lines. When a fault occurs, locating and accessing it requires excavation — typically within the easement corridor, at the utility's right of entry.

The pad-mounted transformers and vaults within the easement area are permanent surface features. They need to remain accessible, which means maintaining clearance around them indefinitely. Planting over them, paving around them, or building structures that block access creates problems.

If you are negotiating an underground distribution easement, pay particular attention to the restoration provisions, the transformer pad locations, and the long-term access rights. These details matter more for underground installations than they often do for overhead lines.