811 In Your State

California

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

Logo of USA North 811

USA North 811
811 or 800-642-2444

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Details

Address:
4005 Port Chicago Hwy
Suite 100
Concord, CA 94520

Hours
24/7

Advanced Notice: Minimum 2 working days with a maximum of 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.

Logo of Underground Service Alert Of Southern California

Underground Service Alert Of Southern California
811 or 800-422-4133

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Details

Address:
PO Box 77070
Corona, CA 92877

Hours
M - F 0600-1900

Advanced Notice: 2 working days 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.