811 In Your State

Washington, D.C.

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

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District One Call
811 or 202-265-7177

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7223 Parkway Drive
Suite 100
Hanover, MD 21076

M - F 0700 - 1700
Emergency Ticket: 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: 15 business days
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.