811 In Your State


Explore damage prevention information, local contacts and rules for safe digging in Iowa.

Logo of Iowa One Call

Iowa One Call
811 or 800-292-8989

Visit Website


320 Le Claire Street
Davenport, IA 52801

24 / 7

Advanced Notice: 2 working days
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: 20 calendar days from the date the notice is made to the Iowa One Call Notification center
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.