|Painted Metal or Plastic posts||Signs located near roads, railroads, and along pipeline right-of-ways||Pipeline casing vent||Marker for pipeline patrol plane|
Though helpful, pipeline markers are limited in the information they provide. Markers are placed near pipelines, but not necessarily on top of them. Marker signs do not provide information on the exact location, depth, diameter or number of pipelines they mark. In addition, a pipeline may not follow a straight line between adjacent markers.
By law, a pipeline marker must provide the approximate location of a pipeline(s), identify the material transported, identify the pipeline operator, and the operator's 24-hour emergency telephone number.
Pipeline marker signs such as those pictured above are important to public safety. They are so important, in fact, that Congress in 1988 passed a law making it a federal crime to willfully deface, damage, remove or destroy any pipeline sign or right-of-way marker that is required by federal law (49CFR 190.229(d)).