Marking Standards

Color Codes

All owners of underground facilities (lines, cable, pipe, etc.) must use the following color code when marking their facilities:

Red	electric power lines, cables, conduit & lighting cables
Yellow	gas, oil, steam, petroleum & gaseous materials
Orange	communications, alarm, cable TV, signal lines, cables & conduit
Blue	potable water
Green	sewers & drain lines
Purple	reclaimed water, irrigation & slurry lines
Pink	temporary survey markers
White	Proposed excavation

Facility Markings

Now you've got colored markings on the ground. You know what the colors mean, but what do the actual markings mean? By clicking the link below, you will open up a pdf document that contains just about everything you need to know about those markings on the ground, from what the lines and arrows mean to what the initials mean. And the best part is, you can save or even print a copy to keep for future reference.

Download a copy