Transmission pipelines are generally viewed as the most reliable, energy efficient and cost-effective mode of transportation for large volumes of natural gas, oil, chemicals and fuels from producing areas to consumer markets. Whilepipelines are safe, incidents can happen and operating companies and stakeholders expect continuous improvement in reliability and integrity. In recent years, proposals for new major pipelines have faced scrutiny, primarily over issues related tosystem integrity and environmental impact. At the same time, the Canadian pipeline industry has moved to systematically improve collaboration and best practices, and has set an agenda of zero incidents.