Call Before You Dig

Whether you are a professional excavator or just a homeowner, start your project right by always calling your state's one call center before you dig. Knowing where underground utility lines are buried before you dig will help protect you from injury and prevent damages to utilities, service disruptions and potential fines and repair costs. Whether you're planting a tree or shrub, or installing a deck or pool, every job requires a call.

One call does it all.  Both Arizona and New Mexico operate one call centers to request utility markings before you start your project. You may contact the one call centers at the numbers listed below or you can just dial 811 to be connected to the one call center for your state. Most states now offer an online option to create a service ticket for the survey and markings.

After your call, all potential utilities are notified and have two full working days to complete the survey and markings.

Even if you've called before for a similar project, you should always get the latest markings from all the utilities operating in your area.  The depth of utility lines varies, and there may be multiple utility lines in one common area, so the easiest and most efficient way to get the markings from all the concerned utilities is to call 811.

Marked lines show you the approximate location of underground lines and help prevent undesired consequences such as injury, service disruptions to an entire neighborhood, or costly fines and repair costs.


Standard Color Codes

Utilities use the following colors to indicate the presence of lines.

Red Electric power lines, cables, conduit and lighting cables.

Yellow Gas, oil, steam, petroleum or gaseous materials.

Orange Communication, alarm or signal lines, cable or conduit.

Blue Potable water.

Green Sewers and drain lines.

Purple Reclaimed water, irrigation and slurry lines.

Pink Temporary survey marking.

White Proposed excavation.

One Call Centers


Arizona Blue Stake
811 or 1-800-782-5348

New Mexico

New Mexico One Call, Inc.
811 or 1-800-321-2537