What Do Utility Marking Colors Mean?

Markings like these are everywhere, especially around new construction. What do these flags and spray-painted markings mean? If you are wondering the answer to these questions, then you’re in the right place.

Utility color code – National Grid Safety

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Color Codes for Utility Markouts. - ACS Underground Solutions

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Utility location - Wikipedia

What are these little colored flags in my yard?

Ultimate Guide To Marking Flags: Why And How Surveyors Use Them