Explore damage prevention information, local contacts and rules for safe digging in Illinois.
One Call Centers
Address:3275 Executive Drive
Joliet IL 60431
Hours:24 / 7
Advance Notice:48-hour notice (two working days), but no more than a 14-calendar day advance notice prior to the start of excavation
Number of days in advance of a digging project that you need to notify the one call center of your intent to dig.
Marks Valid:28 Calendar Days
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.
811 or 312-744-7000