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Call Before You Dig

By Illinois law you must call the appropriate one-call center at least 48 hours before you dig or drive equipment into the ground. The one-call center will then notify ComEd and other utilities of the project. The utilities will mark their facilities.


Illinois One Call (J.U.L.I.E) OR 811 Chicago

Inside the city of Chicago and in the suburbs, call 811. If you need to contact 811 Chicago (formerly known as DIGGER) and you are outside the city of Chicago, please contact 312-744-7000. You must have utility lines marked before you dig - at home, in your neighborhood, at work.

Be Safe

What you don't see underground can hurt you. Before you dig, you are required by law to call 811 a minimum of two business days before you plan to dig. They will help you to locate electric, gas and other underground utility lines. Whether you are planting a tree, building a fence or laying a foundation, contacting a line with a shovel or other digging device can cause injury and can damage power lines.

Never assume you know what is below. Nationwide, one out of every three damages to underground utilities is the result of digging without calling 811.

Steps to Safer Digging

Make the call. One free, simple phone call to 811 will notify all appropriate utility companies of your intent to dig.

Provide advance notice. Contact 811 at least two full business days (but no more than 14 days) prior to digging to ensure utility lines are properly marked.

Provide your project info. When you call, a representative from 811 will ask for the location and description of your digging project. Only call in the area that you need to complete your work.

Allow utilities to mark underground lines. 811 will notify ComEd and other affected utilities that will then send professional locators to the dig site to mark the approximate location of any underground lines.

Understand the location marks. Each type of buried utility has its own color code. Marks may be painted or located with flags.

ColorUtility Type
RedElectric, Cables, Conduit, Lighting Cables
YellowNatural Gas, Oil, Steam, Petroleum
​Orange​Communication, Phone, Cable, Fiber Optic
Purple​Reclaimed Water
​White​Proposed Excavation (Black when snow is present)
Pink​Temporary Survey Marking

Dig Carefully. Once lines have been properly marked, carefully hand dig with a shovel around the marked areas. Also consider designing your project to avoid digging close to the underground facilities.  Never use mechanized equipment near marks or exposed pipes or wires.  Remember that utility marks will not indicate depth, and settling ground, erosion and other factors cause the location of pipes and wires to change over time.

Know the Law

Illinois Underground Utility Facilities Damage Prevention Act (220 ILCS 50/) requires notification by excavators, designers, or any person preparing to disturb the earth's surface anywhere in the state. 220 ILCS 50/ 2.6 requires no less than two working days notice and no more than 14 calendar days notice from excavators who are about to: dig, drill, blast, auger, bore, grade, trench or demolish when in the construction phase. Member companies have 10 days to provide maps of the area requested.

The developer or designated representatives (e.g., excavating contractor) are responsible for obtaining all necessary clearances, markings, and other notifications required by the Illinois One Call System. In the city of Chicago and the suburbs, call: 811. To contact 811 Chicago while you are outside of city limits, call: 312-744-7000. If you are demolishing a building and you need ComEd to remove electric or gas facilities, call 1-800-EDISON-1 (1-800-334-7661).

We're Here to Help

ComEd is dedicated to providing education and assistance. Damage Prevention Group is dedicated to providing education and assistance to customers and excavators regarding safe excavation around ComEd underground electric lines. Safe digging is everyone's responsibility. We provide both office and field personnel to assist you with all issues related to excavation activities throughout our service territory. Our close partnership with IL One Call and our locating vendor, USIC, gives you access to the resources you need to ensure your job site is properly marked before you start to dig.

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