Colour code

Companies with underground networks have their own colour codes to identify what type of buried network they have. Each member company marks the precise location of its network with a specific colour, as shown below.

ANSI Z535.1-2006 (R2011)

Red
Electricity
Blue
Waterworks

Yellow
Natural gas & Hydrocarbon
Pink
Survey
Orange
Telecommunication & Cables
White
Pre-marking

Green
Sewers
Purple
Irrigation

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