811 In Your State


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

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Hawaii One Call Center
811 or 866-423-7287

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305 N.E. 102nd Avenue
Suite 300
Portland, OR 97220

24 hours / 7 days

Advanced Notice: 5 Working but no more than 28 Calendar days prior
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 from the date of issuance
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.