811
In the United States, 8-1-1 provides a uniform national phone number (811) to access local utility location services.
Why use 811?
There are more than one football field’s length (100 billion feet of underground utilities) buried utilities for every man woman and child in the United States.
Before you dig, Call 811.
https://michiganundergroundconstruction.com/811-2/michigan-call-before-you-dig/