White - Proposed Excavation

Pink - Temporary Survey Markings

Red - Electric Power Lines, Cables Conduit & Lighting Cables

Yellow - Gas, Oil, Steam, Petroleum or Gaseous Materials

Orange - Communication, Alarm or Signal Lines, Cables or Conduit

Blue - Potable Water

Purple - Reclaimed Water, Irrigation and Slurry Lines

Green - Sewers & Drain Lines

APWA UNIFORM COLOR CODE