Which of the following is NOT a type of pipeline?

The identification of pipeline types is critical for understanding infrastructure and emergency response related to different materials transported through these systems. A pipeline is primarily designed to transport substances like liquids or gasses, and there are established categories based on the type of material being carried.

Natural gas distribution pipelines are crucial for delivering natural gas from processing plants to residential and commercial users. Natural gas gathering pipelines are responsible for collecting natural gas from production sites and transporting it to processing facilities. Hazardous liquid pipelines transport various liquids that could pose a risk to health and the environment, such as crude oil or hazardous chemicals.

Electricity transmission pipelines, however, do not exist as a category in the context of pipelines defined for materials transport. Instead, electricity is transmitted through power lines and electrical grids, which are distinctly different from pipelines. Therefore, recognizing the absence of pipelines dedicated to electricity transmission clarifies why this is the correct answer. Understanding this distinction is essential for appropriate emergency response planning and for recognizing the roles and risks associated with various types of infrastructure.