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What to Know Before You Dig

What do I need to make a locate request?
What happens next? How do I dig safely?

How to Request a Utility Locate: Step by Step

What’s your project? Shallow or deep, big or small—contact 811 before you start.

1

Contact 811

Getting started is simple and quick.

Have your project details handy.
  • Physical address where you’ll be digging

  • Your email address for confirmation of your ticket and communications

  • Closest intersecting street to the address

  • How locators can access the property

  • Type of digging you are doing

  • Location on the property where you’ll dig

Then, submit your request online or call 811.
Start Your Request

It’s Free.

There is no charge for public utility locates. 

Are there private utilities on the dig site?

If so, contact a private locate company after you receive confirmation of your public locate utility ticket from Colorado 811. 

Learn More About Private Utility Lines
2

Wait 3 Days

Utility company locators will mark your lines within 3 business days.

You’ll know the locate is complete when:

  • Utility companies update your online ticket with a Positive Response status message 

  • You may see color-coded marks—flags, painted lines, or both

Track your request online.
Check Ticket Status 
Provide Open Access

During the 3-day period after you get your email confirmation, be sure the area to be marked is completely accessible to locate crews.

  • No locked gates

  • No animals

3

Respect the Utility Line Marks

Underground public utility lines will be identified by paint, flags, or both.

Be sure marks remain visible for the full duration of your project. They are there to protect you, the dig site, and your team.

Color Codes: What do they mean?

Utility locators marks lines with paint, flags, or both using a standard color code system created by the American Public Works Association (APWA).

4

Follow These Tips to Dig Safely

Always use extreme care when digging near underground utilities.
Be aware of the Tolerance Zone.

The area within 18 inches of utility marks in every direction is called the tolerance zone. In this zone, dig only by hand, if at all.

Remember: The depth of utilities varies.

Underground utilities, pipes, or cables are buried at different depths depending on the location and type of utility. Over time, depth can change because of erosion or leveling. 

You’ll see an indication of depth only if the utility locator actually knows that information. 

5

Request Renotification

If any locates are incomplete, missing markings, unfound utility, or discrepancy in Positive Responses, submit a renotification request.

To submit a renotification the following criteria shall exist (otherwise a new request must be processed)

  • There was an original ticket processed

  • It is not more than (five) 5 business days after the original Locate By Date

  • Positive Response has been verified

  • Utility not found in located area (It is not more than thirty (30) days after the original Locate By Date for this reason only)

Why Contact 811?   It’s the Law.

Don’t put yourself at risk. If you don’t call you could face: 

  • Injury, in some cases, fatal

  • Expensive property and environmental damage

  • Natural gas explosion or fire 

  • Disrupting essential utility service to you and your community

  • Job delays

  • Legal consequences 

Still have questions?

We're here to help.

Contact Us

Additional Resources

Excavator Handbook

Created specifically for professional excavators, this comprehensive handbook provides in-depth guidance on safe digging practices while ensuring full compliance with Colorado state laws and regulations. It equips you with the critical information and best practices necessary to protect underground utilities and complete excavation projects responsibly.

Find more resources here.

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