811 In Your State

You are now leaving the site and being redirected to your requested Call 811 location: .

California

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

Logo of 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.

Underground Service Alert of Northern California and Nevada
811 or 800-642-2444

Visit Website

Details

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

Hours
24/7

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.

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.

Homeowner Submit Request Contractor Submit Request
Logo of 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.

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

Visit Website

Details

Address:
PO Box 77070
Corona, CA 92877

Hours
M - F 0600-1900

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.

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.

Homeowner Submit Request Contractor Submit Request
Back To Map