Utility colour codes are used for identifying existing underground utilities in construction areas with the intent of protecting them from damage during excavation. Coloured lines, flags or stakes are used to mark the location and denote the type of underground utility. The following table identifies the Uniform Colour Codes for temporary marking of underground utilities.
|
Red |
electric power lines, cables, conduit, and lighting cables |
|
Orange |
telecommunication, alarm or signal lines, cables, or conduit |
|
Yellow |
natural gas, oil, steam, petroleum, or other gaseous or flammable material |
|
Green |
sewers and drain lines |
|
Blue |
potable drinking water |
|
Violet |
reclaimed water, irrigation, and slurry lines |
|
Pink |
temporary survey markings, unknown/unidentified facilities |
|
White |
proposed excavation limits or route |
