California

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Before You Dig in California

Explore damage prevention information, local contacts and rules for safe digging in California.

Underground Service Alert of Northern California and Nevada

Serving Northern and Central California, from the California/Oregon border south to Kern and San Luis Obispo county.

Information

  • 811 or 800-642-2444
  • Visit Website
  • 24 / 7
  • 4005 Port Chicago Hwy
    Suite 100
    Concord, CA 94520

Advanced Notice
2 working days, not including the date of notification, but not more than 14 calendar days.
Number of days in advance of a digging project that you need to notify the one call center of your intent to dig.

2 working days, not including the date of notification, but not more than 14 calendar days.
Number of days in advance of a digging project that you need to notify the one call center of your intent to dig.

Marks Valid
While the marks are reasonably visible with a valid ticket (tickets valid 28 days)
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.

While the marks are reasonably visible with a valid ticket (tickets valid 28 days)
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.

Homeowner Submit Request Contractor Submit Request

Underground Service Alert Of Southern California

Serving the following California Counties: Imperial, Inyo, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara and Ventura.

Information

  • 811 or 800-422-4133
  • Visit Website
  • M - F 0600-1900
  • PO Box 77070
    Corona, CA 92877

Advanced Notice
2 working days, not including the date of motivation, but not more than 14 calendar days.
Number of days in advance of a digging project that you need to notify the one call center of your intent to dig.

2 working days, not including the date of motivation, but not more than 14 calendar days.
Number of days in advance of a digging project that you need to notify the one call center of your intent to dig.

Marks Valid
While the marks are reasonably visible with a valid ticket (tickets valid 28 days)
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.

While the marks are reasonably visible with a valid ticket (tickets valid 28 days)
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.

Homeowner Submit Request Contractor Submit Request

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