3.5 Adoption of 811 Three-Digit Dialing and Single Toll-free Telephone Number with Nationwide Access85/
The 811 center adopts 811 three-digit dialing and a single toll free telephone number with nationwide access.
811 is used by all excavators within every state in the United States to submit locate requests. In addition to 811, the center provides a toll-free number that has nationwide access, meaning that a caller can reach the center from anywhere in the country.
One Call Systems International Voluntary Recognition Program
Existing operating practices from various states’ 811 centers
49 CFR Part 198
NTSB Safety Study (NTSB/SS-97/01; PB97-917003)