One-Call

The one-call system refers to the network of state-operated or state-authorized notification centers that process excavation requests and distribute them to affected utility operators. The term "one-call" reflects the original concept of making a single phone call to reach all utilities in an area, rather than contacting each utility operator individually. Today, the one-call system is accessible via the 811 phone number and through web-based ticketing portals.

One-call systems have been in operation since the late 1960s, with the first centers established in response to increasing damage to underground utilities from construction and excavation activities. Over the decades, the system has evolved from a manual, phone-based operation to a sophisticated digital platform that uses GIS mapping, automated utility notification, positive response tracking, and mobile-friendly interfaces.

For hydrovac contractors, the one-call system is a daily tool. Contractors submit locate requests for every excavation project, track the status of locate responses, verify that all utilities have been marked before excavation begins, and maintain records of their one-call tickets as documentation of due diligence. Understanding the one-call process, including state-specific timelines, renewal requirements, and emergency locate procedures, is fundamental knowledge for anyone in the hydrovac industry.