What safety precautions are taken where pipelines cross rivers?
— Community and First Nations Leaders
We recognize that waterways, such as rivers, are a particular concern to many communities. Rivers would be crossed using standard pipeline industry techniques that mitigate potential environmental effects and comply with all regulations.
We’ve created a video to help explain how pipeline river crossings are built:
What happens if there is a natural gas leak along the pipeline?
— Guests at public information sessions.
TransCanada uses high-quality steel and the best construction practices when building pipelines. All pipe is tested well above normal operating pressure before it is put into operation. Our pipelines are cathodically protected, which means a low-voltage electric current is induced in the vicinity of the pipeline to inhibit external corrosion. Pipelines are monitored 24 hours a day by trained operators who respond immediately to any indication of abnormal operation.
Cleaning and inspection tools called “smart pigs,” are pushed along inside the pipeline using the pressure of the natural gas itself. These tools gather data for the assessment of pipeline integrity. The information gathered helps shape our pipeline maintenance programs. When anomalies are detected, the pipeline segment in question may be excavated and visually inspected. It is either repaired on the spot or replaced. The pipeline right-of-way is also patrolled on the ground or from the air.
Every year we invest millions of dollars in preventive maintenance and integrity programs that help us proactively identify and upgrade the safety and operation of our energy infrastructure network. However, if an emergency occurs, TransCanada quickly confirms the exact location of the emergency and identifies affected facilities. Valves spaced at intervals throughout the pipeline system shut off the flow of gas and allow the location to be effectively isolated. TransCanada works closely with local emergency service groups, regulatory agencies, landowners, community officials and the media throughout any incident.