Why 811 Doesn’t Mark Everything Underground?

Why 811 Doesn’t Mark Everything Underground?

Calling 811 is an important first step before any digging project—but it’s also one of the most misunderstood. Many homeowners and contractors assume that once 811 marks the site, all underground utilities are accounted for. Unfortunately, that’s not the case.

So why doesn’t 811 mark everything underground? The answer comes down to ownership and responsibility.

What 811 Actually Covers

The 811 “Call Before You Dig” system notifies public utility companies to mark underground lines they own and maintain.

These utilities typically include:

• - Electric

• - Gas

• - Water mains

• - Sewer mains

• - Telecommunications

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Public utilities are usually marked only up to the point of service, such as a meter or main connection.

What 811 Does Not Mark

Anything beyond the public utility’s point of service is considered private and is not included in a free 811 locate.

This often includes:

• - Water and sewer lines from the meter to the building

• - Private electric lines to garages, sheds, or lighting

• - Irrigation systems

• - Septic systems

• - Data, security, or landscape lighting lines

• 
  

These utilities still pose serious safety and financial risks—but they are the property owner’s responsibility.

Why Private Utility Locating Exists

Private utility locating fills the gap left by public locating services. A private locator can identify underground utilities that:

• - Are privately owned

• - Have no records

• - Were installed years or decades ago

• - Were added after the original construction

• 
  

This service helps prevent utility strikes, project delays, and costly repairs.

Calling 811 is essential—but it’s not the full solution. If you’re digging on private property, installing structures, or working beyond utility meters, private utility locating is often necessary to ensure safety.

When it comes to underground utilities, what you can’t see can still cause serious damage.