Call 811 Call 811

Washington, D.C.

Washington, D.C.

Explore damage prevention information, local contacts and rules for safe digging in Washington, D.C.

One Call Centers

811 or


7223 Parkway Drive
Suite 100
Hanover MD 21076


M - F 0700 - 1700 Emergency Ticket: 24/7

Advance 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:

15 business days
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.