Call 811 Call 811



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

One Call Centers

811 or


320 Le Claire Street
Davenport IA 52801


24 / 7

Advance 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:

Twenty (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.