Call 811. Get lines marked. Dig safely.

811 is a free one-call service managed by USA North. Call 811 at least two business days before your planned digging project. USA North will contact PG&E and other utilities. Representatives of these utilities will then come out to locate and mark their underground lines.

Steps to Take Before You Dig

  • Identify and mark the digging area with a white substance such as chalk, spray paint, flour or marking whiskers, tags, stakes or any combination.
  • Call 811 at least two business days before you dig. Contractors are required by California state law to call.
  • We use colored utility flags, stakes or paint to mark underground lines, following the American Public Works Association Uniform Color Code. Please leave the marks in place until you are finished digging.
APWA Uniform Color Code
  • Use handheld digging tools when digging within 24 inches of the outside edge of any underground lines. After finishing your project, carefully backfill and compact the soil.
To get more information or to make a request online, go to the USA North or DigAlert website.
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More Resources and Information

  • Gold Shovel Standard Safety Program
    This first-of-its kind excavation safety program was created to reduce accidents and protect our underground gas and electric systems.
    Learn More »

    Free 811 Safety Posters
    Post them in the workplace and on the jobsite to remind workers that it's necessary to call 811 before digging.
    Download English (PDF, 10.6MB)
    Download Spanish (PDF, 11.2MB)

    Common Ground Alliance
    Common Ground Alliance is a member-driven association committed to saving lives and preventing damage to underground infrastructure by promoting effective damage prevention practices.
    Visit Common Ground Alliance »

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