Thank you. That's a good question.
There are many pipelines in service that are of the same vintage as Line 5. A lot them will outlast you and me, especially due to, in more recent years, the increased quality control and the increased inspection programs, especially through pegging programs. They run smart pegs through the lines so they can do internal inspections over great distances in extreme detail. The technology has helped greatly. That alone can extend the life of the pipelines substantially.
Additionally, they are also constantly monitoring and testing, Enbridge in particular. I know from experience. Before I was in this office, I ran several pipeline jobs on Line 9 where we installed remote valve locations, and their inspection program is so stringent it's absolutely maddening for someone who's trying to run one of those jobs. Their red book will make you pull your hair out, it goes into such great detail.