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The Natural Gas Delivery System

Gas Pipeline marker

Transmission pipeline markers

High-visibility markers indicate the approximate location of pipelines in rights-of-way. Markers include the pipeline company’s name, the type of product carried in the pipeline and an emergency phone number.

This is one example of a transmission pipeline marker.

These markers are usually found at roadways, railroad crossings and other points along the pipeline route. They can be a useful tool for identifying the general location of high-pressure natural gas transmission pipelines; however, keep in mind that for security purposes, pipeline markers do not show the exact location, path, depth or number of gas pipelines in the area. In addition, pipelines may not follow a straight course between markers.

You can also locate pipelines in your area by visiting the National Pipeline Mapping System website at