Why Calling 811 Is Not Always Enough in Pierce and Thurston Counties

If you work in excavation or construction anywhere in Pierce County or Thurston County, you already know the drill.

Call 811. Wait for markings. Then dig.

That’s standard practice. And it’s the right first step.

But here’s the part that catches a lot of contractors off guard: 811 does not always show you everything underground.

In Western Washington, that matters more than people realize.

This article explains why.

What 811 Typically Covers

811 coordinates public utility owners so they can mark lines they are responsible for. That usually includes:

• Public power
• Gas
• Water
• Sewer
• Communications

It’s an essential safety layer. No professional contractor skips it.

But it is not a complete underground map.

What 811 Often Does Not Cover

On many commercial and developed properties, there are utilities that fall outside the public marking process.

These can include:

• Private power lines running across a property
• Parking lot lighting circuits
• Irrigation systems
• Site-added communication lines
• Abandoned or undocumented infrastructure
• Security and access control wiring

In cities like Tacoma, Puyallup, Lakewood, Olympia, and Lacey, many commercial sites have been modified multiple times over the years. Not every change makes it into a clean set of as-builts.

That’s where problems start.

Why This Is a Real Risk in Western Washington

Pierce and Thurston Counties have:

• Older commercial developments
• Layered infrastructure over time
• Mixed documentation quality
• Weather and soil conditions that can shift or obscure installations

If you are trenching, drilling, or doing site improvements, hitting a private line can mean:

• Immediate shutdown
• Expensive emergency repairs
• Delayed inspections
• Strained client relationships
• Schedule ripple effects across trades

That is why experienced contractors treat 811 as step one, not the final answer.

When Private Utility Locating Makes Sense

Private utility locating becomes valuable when:

• The project is commercial
• The site has a long history of modifications
• Plans are incomplete
• The cost of hitting something is high
• Multiple trades are stacked in sequence

In those situations, bringing in a private locator adds a layer of clarity before heavy equipment goes in the ground.

Mt. View Locating Services LLC, based in Buckley, WA, works with contractors throughout Pierce and Thurston Counties to help reduce that uncertainty.

You can review their full service scope here: Mt. View Locating Services LLC

Their Google Business listing is here for reference and reviews: Mt. View Locating Services LLC on Google Maps

And their service breakdown is here: Our Services

How Private Locating Reduces Excavation Risk

At its core, private locating is about risk management.

It helps answer a simple but critical question:

What is actually under this work area right now?

Instead of relying solely on historical documentation, a private locate helps confirm conditions in the specific footprint that matters.

For commercial projects, that can protect:

• Timelines
• Budgets
• Safety compliance
• Client trust

Frequently Asked Questions

Does calling 811 make it safe to dig everywhere on the property?

Not necessarily. 811 is essential, but private lines and site-installed infrastructure may not be included.

Is private locating only for large commercial projects?

No. Any project where underground damage would be costly can benefit.

Can private locating work alongside GPR?

Yes. On complex sites, private locating is often paired with Ground Penetrating Radar to reduce subsurface uncertainty.

Why is this especially relevant in Pierce and Thurston Counties?

Because many properties have layered improvements over decades, which increases the chance of undocumented infrastructure.

The Bottom Line

Calling 811 is responsible.

Adding private utility locating when appropriate is strategic.

For contractors in Western Washington, especially across Pierce and Thurston Counties, that extra layer can mean the difference between a smooth project and a very expensive surprise.