811 In Your State


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

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Missouri One Call System
811 or 1-800-344-7483

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824 Weathered Rock Rd.
Jefferson City, MO 65101

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: As long as visible
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.