Underground Utility Color Code

What do the different colored flags mean?

White

Proposed Excavation

Pink

Temporary Survey Markings

Green

Sewer and Drain Lines

Blue

Potable Water

Red

Electrical Power Lines, Cables, Conduit and Lighting Cables

Yellow

Gas, Oil, Steam, Petroleum or Gaseous Materials

Orange

Communications, Alarm or Signal Lines, Cables or Conduit

Purple

Irrigation and Slurry Lines, Reclaimed Water

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