Line 3 Replacement Project

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The safety of the public, our communities and our employees is Enbridge’s top priority. To ensure the safe construction and operation of our pipelines, we are committed to safety in our processes, our people and our technologies.

Operational Integrity

As part of our commitment to the safe and responsible operation of our pipelines, we employ comprehensive preventative measures, including:

  • High-quality pipeline material, anti-corrosion coatings and cathodic protection (a low-level direct current to inhibit corrosion)
  • Pressure testing of new and existing pipelines
  • Inspection and preventative maintenance programs
  • Monitoring of pipelines and related facilities
  • Frequent aerial and periodic ground surveys of the right-of-way
  • Automatic shut-off valves and remote control valves; and
  • Emergency response preparedness training and drills for employees and third-party emergency responders

Comprehensive Preventative Maintenance Program

We continually perform routine maintenance across our pipeline system, including using internal inspection tools that travel inside our pipelines to collect data and evaluate the condition of the pipeline. In some cases, the inspection tool locates a feature that requires a visual inspection to determine if a repair or other action is required. This is called a maintenance dig.

Features that may require a repair include: third-party excavation damage, worker error, external corrosion, or denting.

The Seven Steps of a Maintenance Dig:
Step 1: Identify dig site and strip topsoil where applicable
Step 2: Excavate to expose the pipe
Step 3: Clean the exposed pipe
Step 4: Inspect the pipe
Step 5: Repair the pipe segment, as necessary
Step 6: Re-coat the pipe
Step 7: Excavation backfill, cleanup and restoration

Construction Safety

  • Our construction standards meet or exceed federal and industry standards.
  • 100% of our construction welds are inspected using radiography or ultrasonic testing.
  • We conduct extensive inspections throughout the Project process.
  • We have our pipelines internally inspected and pressure tested before placing them into service.
  • We apply a cathodic protection system to pipe and facilities to inhibit corrosion.

Maintenance Safety

  • Our pipelines are monitored around-the-clock with an industry-leading pipeline control system. 
  • We conduct regular and comprehensive preventive maintenance on our pipelines and facilities.
  • We utilize a rigorous and extensive worker training program.
  • We are committed to public awareness outreach.
  • We conduct periodic internal inspections of our pipelines.
  • We conduct aerial patrols of the pipelines and facilities twice a month.

Public Awareness and Damage Prevention

Know about Pipeline Markers

  • Pipeline markers provide emergency contact information and information about the products transported.
  • Pipeline markers identify the existence of pipelines, and are visible at roads and from the air.

Dig Safely

  • Before digging, call 811, the national “Call Before You Dig” number, and wait for verification to proceed.
  • Follow guidelines for digging safely to prevent damage to underground utilities.

Know the Warning Signs of a Potential Emergency

  • A pool of liquid on the ground
  • Discolored vegetation or snow
  • Oily sheen on water
  • An unusual petroleum or “rotten egg” odor

How to Ensure a Safe Response

  • Call 911
  • Then call Enbridge at 1-800-858-5253
  • Follow instructions provided by Enbridge and local emergency responders 

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