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Color	Utility type
Red	Electric power lines, cables, conduit, and lighting cables
Orange	Telecommunication, signal lines, cables, alarm or conduitlighting cables
Yellow	Natural gas, oil, petroleum, or other gaseous or flammable material
Green	Sewage and drain lines.
BlueE	Drinking water
Purple	Reclaimed water, irrigation, and slurry lines
Pink	Temporary survey markings, unknown/unidentified facilities
White	Proposed excavation limits or route