Call 811 Call 811



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

One Call Centers

811 or


925 Irwin Run Road
West Mifflin PA 15122


24 / 7

Advance Notice:

Construction phase - 3 to 10 business days; Design phase - 10 to 90 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:

as long as equipment is kept on site
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.