
	WHAT IS LOCATING?
	STANDARD METHODS
	SUBSURFACE UTILITY ENGINEERING (SUE)
	UNDERGROUND UTILITY MAPPING
	COLOUR CODE FOR MARKING

Colour Code For Marking

Ontario Region Common Ground Alliance (ORCGA) designated colours for marking of underground utilities are:

COLOUR	TYPE OF FACILITY / INDICATOR
	WHITE - Proposed Excavation
	PINK - Temporary Survey Markings
	RED - Electric power lines / Hydro
	YELLOW - Gas, Oil, compressed air and gases
	ORANGE - Telephone, TV, Communications
	BLUE - Water
	PURPLE - Reclaimed, treated or "grey" water
	GREEN - Sewer