When to Hire a Private Locator Instead of 811

811 is an essential public safety system. It coordinates utility owners to mark publicly owned infrastructure before excavation. But there are situations where 811 alone is not enough, and understanding when to bring in a private locator can be the difference between a project that runs smoothly and one that gets derailed by an avoidable utility strike.

What 811 Is Designed For

811 is intended to protect public utilities within defined service areas. It typically covers main lines and infrastructure maintained by utility providers who are members of the Utility Notification Center of Colorado (UNCC).

However, 811 does not guarantee that all underground utilities on a site will be identified. It does not cover privately owned infrastructure, and it does not provide depth information, engineering-grade documentation, or investigation of unknown or undocumented utilities.

The Real Cost of Utility Strikes in Colorado

Before discussing when to hire a private locator, it is worth understanding what is at stake. In Colorado, utility strike costs vary widely depending on the type of utility and the severity of the damage:

• Gas line strike: Emergency response, evacuation, and repair can easily exceed $50,000, and that is before accounting for regulatory fines, project shutdown, and potential legal liability. A gas strike in a populated area can trigger OSHA investigation.
• Fiber optic or telecommunications: A single fiber cut can affect thousands of customers and result in repair costs of $10,000 to $75,000+ depending on the provider and the number of fibers involved.
• Water main break: Repair costs typically range from $5,000 to $30,000, with additional costs for road repair, water loss, and boil-water advisories if the main serves a potable system.
• Electric line strike: Beyond the immediate safety hazard, repair costs can range from $10,000 to well over $100,000 for high-voltage distribution lines.
• Project delays: Regardless of utility type, a strike typically adds 2 to 14 days to a project schedule while repairs are completed, inspections are passed, and work is allowed to resume.

Compare these numbers to the cost of a private locate, typically a few hundred to a few thousand dollars depending on site size and complexity, and the risk-reward calculation becomes clear.

Situations Where Private Locating Is Appropriate

Private locating is appropriate whenever the project involves uncertainty that 811 does not resolve. Common situations include:

• Work occurring beyond the public right-of-way on private property
• Commercial or industrial property projects
• Utilities beyond the meter or service point
• Design-phase infrastructure planning and engineering support
• Sites with incomplete, conflicting, or nonexistent records
• Risk-sensitive or high-consequence excavations
• Real estate due diligence and property assessments
• Post-construction verification of installed utilities

Decision Framework: Is Private Locating Worth It?

A simple framework for deciding whether to hire a private locator:

• Are you digging on private property? If yes, 811 likely does not cover the utilities on your site. Private locating is appropriate.
• Do you have complete, reliable records of all underground infrastructure? If no, or if you are not confident in the records, field verification reduces risk.
• What is the consequence of hitting something? If a strike would cause a safety hazard, significant financial loss, or major project delay, the cost of private locating is justified.
• Does your project require documentation beyond paint? If engineers, asset managers, or regulatory bodies need deliverables, private locating provides that level of documentation.
• Are you working in a congested utility corridor? Dense areas with multiple utilities in close proximity require more careful investigation than standard 811 marking typically provides.

If you answered yes to any of these, private locating is likely worth the investment.

Project Scenarios

Here are common Colorado project types where private locating adds clear value:

Commercial development: A new retail building is being constructed on a site that previously held a different commercial use. The site has private storm drains, irrigation, exterior lighting circuits, and an old grease interceptor line, none of which will appear on 811 markings. A private locate identifies these utilities before excavation begins, preventing costly surprises during foundation and utility work.

Road widening: A county road widening project requires excavation along the existing road edge. 811 marks the major utilities in the right-of-way, but service laterals crossing the road to adjacent properties are often poorly documented. A private locator traces these laterals to prevent cuts during grading.

Fiber installation: A fiber provider is running new conduit using horizontal directional drilling (HDD). The bore path crosses multiple utility corridors. While 811 provides surface markings, the driller needs depth information and verification of crossing angles to set bore depths safely. A private locator provides depth readings and crossing documentation that the drill crew can use to plan the bore.

Municipal infrastructure upgrade: A water district is replacing aging mains and needs to understand what else is in the corridor before designing the replacement. A private locate provides field-verified utility positions that the design engineer can incorporate into plans, reducing change orders during construction.

How Private Locating Integrates with the 811 Process

Private locating does not replace 811, it supplements it. The recommended workflow is:

• Step 1: Submit your 811 ticket. This is legally required in Colorado before any mechanical excavation.
• Step 2: Allow utility owners to respond and mark their facilities.
• Step 3: Evaluate the 811 markings against your project scope. Identify gaps; private property, undocumented utilities, areas where no marks appeared despite known infrastructure.
• Step 4: Engage a private locator to investigate the gaps. Provide them with the 811 results so they can focus on what was not covered.
• Step 5: Combine the 811 markings and private locate results into a complete picture before excavation begins.

This integrated approach gives you the best possible understanding of subsurface conditions without duplicating effort.

The Difference Is Intent

811 is a notification system. Private locating is a professional service.

When projects require verification, documentation, or investigation beyond basic compliance marking, private locating provides the additional clarity that keeps projects on schedule and on budget.

Questions to Ask When Hiring a Private Locator

Not all locating providers offer the same level of service. When evaluating a private locator, ask:

• What locating methods do you use? (Look for direct connect capability, not just induction.)
• What documentation or deliverables will I receive?
• Do you carry professional liability insurance?
• Can you provide references from similar project types?
• How do you handle utilities that cannot be traced or located?
• What is your process for communicating limitations and uncertainty?
• Do you have experience with Colorado soil conditions and utility patterns?
• Can you coordinate with our 811 results to avoid duplication?

A provider who is transparent about what they can and cannot do is far more valuable than one who promises to find everything.

Reducing Risk Before You Dig

Excavation damage is costly and, in many cases, entirely preventable. In high-risk environments, relying solely on standard 811 markings can leave gaps in your understanding of subsurface conditions.

If uncertainty exists, the investment in a private locate is small compared to the cost of a single utility strike. For a detailed look at what happens during a utility locate, including the technology and methods involved, see our walkthrough of the locating process.