How long is the inquiry identification number for an underground service alert (USA) considered viable?

The inquiry identification number for an underground service alert (USA) is considered viable for 28 days. This time frame is important as it allows sufficient opportunity for utility companies to respond to the inquiry and take necessary precautions to ensure safety during excavation or construction activities.

After 28 days, the alert is no longer valid, and any excavation work would need to be re-initiated with a new inquiry identification number. This protocol is essential for maintaining safety and compliance with the laws governing underground utility markings.

The duration is set by regulations that ensure utility operators have adequate time to locate and mark their facilities, protecting workers and the public from accidents related to unmarked underground utilities.