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