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Explore damage prevention information, local contacts and rules for safe digging in California.
USA North 811
811 or 800-642-2444
4005 Port Chicago HwySuite 100Concord, CA 94520
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.
Underground Service Alert Of Southern California
811 or 800-422-4133
PO Box 77070Corona, CA 92877
M - F 0600-1900