Which system must pipeline operators participate in to coordinate locating underground facilities?

• A. Emergency Notification System
• B. One-Call System
• C. Environmental Protection Agency
• D. Public Works Registry

Answer: (B)

Coordinating the locating of underground facilities is done through participating in the One-Call System, the nationwide “call before you dig” program. When a pipeline operator is part of this system, a single call to 811 notifies all underground facility operators in the area to locate and mark their lines. This ensures that anyone planning to dig has a clear map of where utilities run, reducing the risk of striking a line and causing gas leaks, outages, or injuries.

The other options aren’t designed for coordinating underground facility locating. An emergency notification system is for urgent safety incidents, not pre-dig coordination. The Environmental Protection Agency is a regulatory body, not a locating system. A public works registry may exist in some places but does not provide the standardized nationwide coordination needed before digging.