Call 811 Call 811



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

One Call Centers

811 or


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


24 hours / 7 days

Advance 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.