California SPECIFICATIONS & Guidelines
California Department of Transportation
Caltrans Standard Specifications, 2022 Edition
Caltrans Standard Plans, 2022 Edition
Call Before You Dig
USA North 811
Service Area: Northern and Central California
Call: 811 or 800-642-2444
Underground Service Alert of Southern California
Service Area: the counties of Imperial, Inyo, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura.
Call: 811 or 800-422-4133