Quick Links
Uniform Color Code
The uniform color code is used for marking excavation sites and underground facilities in conflict with an excavation.
Underground facilities may be marked on the ground in either paint, stakes, or flags.
Tolerance or Safety Zone
Tennessee state law requires excavators to exercise reasonable care when working inside the tolerance or safety zone. The tolerance zone is the width of the buried facility plus two (2) feet (or 24 inches) on each side.
