3.19 Direct Electronic Locate

One Call Center

Practice Statement:

The one call center provides users a means of direct, electronic entry of locate requests that maintain comparable ticket quality to an operator-assisted entry.

Practice Description:

The one call center has interactive data communications sufficient to permit remote data entry for members and excavators. The remote interface validates the input information and allows the user to make corrections if necessary. This correction is accomplished by referencing the same geographic database used at the one call center when taking a called-in request. This process ensures that the ticket quality is maintained for all tickets.


  • “Model One Call for the 20th and 21st Century,” AT&T (was available when the practice was created but is no longer available)
  • Existing operating practices from various states’ one call centers
  • NTSB Safety Study (NTSB/SS-97/01; PB97-917003)


One Call Center One Call Center

Facility Owner Facility Owner

Excavator Excavator

Locator Locator

Project Owner Project Owner

Designer Designer