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April is National Safe Digging Month

Did you know...

Every year in North America, contact with underground utilities causes unnecessary injuries, deaths and billions of dollars worth of damages.

Most incidents could be prevented by using your local One-Call service to locate utilities before you dig.

April was designated Safe Digging Month to help raise awareness around this important issue, at a time when many of us may be planning our spring and summer projects. From backyard DIY decks to road construction to municipal development, your first step in planning any project that involves digging should be to understand where it is safe to dig, and where your essential utilities are.

Why take the risk?

When you make a locate request, the One-Call provider will notify utility owners in the area, who will come out and mark the pipes, cables, wires and more that could be running through your work area. It’s a free service and is completed in 3-5 days, depending on your province or state.

Why is it important?

Hear two different perspectives on safe digging, one from someone who’s life and health were severely impacted by digging near underground utilities, and the other from a business owner whose home and business are next to a pipeline.



United States




Safe Digging, lessons learned

Olympian Cliff Meidl tells his inspiring story of recovery and perseverance, following a tragic excavation accident. From simply learning to walk again, to beating the odds and making the U.S. Olympic Team-- twice. It is a reminder to us all, that accidents can happen to anyone.

Expanding operations the safe way

Hugo Bonjean, owner of Spirit Hills Winery, won't even put a fence post in the ground unless he's done his due dilligence, and contacted us to ensure his land is marked safe for digging.

Dig with C.A.R.E.

Call or click before you dig
Visit Clickbeforeyoudig.com in Canada or call 811.com in the United States

Allow required time for marking
Allow two-to-five business days (varies by state and province)

Respect the marks
Lines are marked by flags, paint or other markers (normally yellow for pipelines)

Excavate carefully
Hand dig to determine the exact locations of pipelines. All digging must take place during the time allotted by the TC Energy representative

How to use the One-Call Service

How the OneCall System works - Digging on the farm

View PDF

Life-saving information

Did you know that in most provinces and states, it is a legal requirement to contact your local One-Call service before digging or excavation? These cosequences may include:

Fines and repair costs to fix the underground utility

• Provincial, state or federal regulators can levy hefty fines to both the person excavating and the company responsible, depending on the local regulations

• Repairs to utilities often cost more than the value of your original project, not including reclamation and clean-up costs

Interrupted services such as electricity, gas and water

• Underground utilities carry essential and critical services for the community. Interruptions to these are more than just minor inconveniences; they can put people, businesses and livelihoods at risk

•  Some utilities are buried as little as 12 inches below the surface, so even a simple shovel can cause serious damage

Risk of serious injuries and death

• Since 2008, the Pipeline and Hazardous Materials Safety Administration (PHMSA) has reported 715 injured workers and 79 fatalities due to damages done to underground infrastructures during excavation work*.

*Source (PHMSA, 2018)

Although a pipeline leak is rare, it is important to know how to recognize the signs. Use your senses of smell, sight and hearing to detect a potential pipeline leak.


What you may smell

Natural gas
  • Transmission lines that transport natural gas across Canada are rarely odourized, but may have a slight hydrocarbon smell. Distribution lines that transport natural gas to homes and businesses are odourized and could smell skunk-like or similar to rotten eggs.
  • Many petroleum products have a distinct smell. Crude oil can possess a rotten egg, gasoline, tar or skunk-like odor.


What you may see

Natural gas
  • Dead or dying vegetation on or near a pipeline in a normally green area
  • Water bubbling or blowing into the air at a pond, creek or river
  • Dirt being blown or appearing to be thrown into the air
  • An accumulation of ice or frost over the pipeline (in the summer)
  • Amber to black liquid
  • Rainbow sheen or black liquid on top of water
  • Discoloured vegetation on or near a pipeline in an area that is usually green
  • Stained or melted snow/ice over pipeline areas


What you may hear

Oil or natural gas
  • A hissing, roaring or bubbling sound

If you witness any of the signs listed above, or any other unusual sights, sounds or smells near a pipeline location, follow these steps immediately:

  1. Leave the area on foot – don’t use motor vehicles or any equipment that could be a potential ignition source.
  2. Move to a safe location and call ‘911’.
  3. Call TC Energy's emergency number. The emergency number can also be found on all TC Energy pipeline marker signs.
  4. Warn others to stay away.

I know where the pipeline is, do I still need to make a One-Call?
You can never be sure where underground utilities are unless they have been marked by a professional. Utilities can shift from erosion or natural forces or new ones may have been installed without your knowledge. Using the free One-Call service allows you to conduct your work safely.

How do I contact my local One-Call service?
Luckily there are resources to help you reach your local service easily. In Canada, you can visit www.ClickBeforeYouDig.com to find your local One-Call service, as well as other useful safe-digging rules and regulations in your province. In the U.S. you can dial 811 or visit www.call811.com to get in touch with your state’s provider.

When do I need to make a One-Call?
You need to make a locate request anytime you are disturbing the ground. This includes digging, piling material, paving or even driving equipment over a right-of-way. Any action that could impact something below the surface counts as ground disturbance.

What is a crossing agreement?
A crossing agreement is an agreement between you and the pipeline operator that allows you to conduct your work safely with the permission and understanding of the pipeline operator. Any changes to your work need to also be approved to ensure your safety.

How do I know if I need a crossing agreement?
If you plan to do any work on a right-of-way or access the right-of-way while conducting your work, there’s a good chance you need a crossing agreement. To find out for sure, you can either make a One-Call and wait for the pipeline operator to contact you, or you can contact the pipeline operator directly through their crossings team. Contact information can be found on this page.

What is the “prescribed area”?
The prescribed area is the area that extends 30 metres on either side of the pipeline centerline. Ground disturbance within this area requires written consent.

Emergency contacts

United States

In case of emergency, click here for contact numbers

Contact our US crossings team:


Landowner inquiries:

General inquiries:


Emergency contacts


Call before you Dig: