What the marks mean

COLOR CODE
For Marking Underground Utility Lines

White – Proposed excavation

Pink – Temporary survey markings

Red – Electric power lines, cables, conduit and 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 – Sewer and drain lines