811 In Your State


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

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Montana 811
811 or 800-424-5555

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Kalispell, MT

24 / 7

Advanced Notice: 2 business 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: 30 Days
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.