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Pipeline Markers

Examples of pipeline markers

Written agreements or easements between landowners and pipeline companies allow pipeline companies to construct and maintain pipeline rights-of-way across privately owned property.

If you are not aware of pipelines on or near your property, check for pipeline markers posted on your property, along your property and elsewhere in your neighborhood. You may also check your property record at your county clerk’s office.

Pipeline markers are an important safety precaution since pipelines are underground. Markers are found where a pipeline intersects a street, highway or railway. Be aware of any pipeline markers in your neighborhood. While markers are helpful, they provide very limited information.

Markers DO NOT show:

  • The depth of the pipelines
  • The number of pipelines
  • The exact location of the pipelines

Markers DO show:

  • The approximate location of the pipelines
  • The product transported
  • The natural gas operator
  • The natural gas operator’s emergency phone number

Recognizing a Pipeline Leak

  • Look for a dense fog, mist or white cloud, discolored vegetation, bubbling in water or blowing dust.
  • Natural gas is naturally odorless. However, a distinctive smell is added, similar to rotten eggs, so that you can smell a potential leak.
  • You may hear a hissing, whistling or roaring noise.

Alagasco regularly conducts walking and vehicle leak surveys of its facilities. If you suspect a leak:

  • DO NOT touch, breathe or make contact with the leak.
  • DO NOT light a match, start an engine, turn light switches on or off, use a cell or home phone or do anything to create a spark.
  • DO NOT attempt to extinguish any fire.
  • DO NOT attempt to operate valves.
  • DO leave the home, building and area of the suspected leak, and get to a safe area. Call 911 to notify police and fire officials and warn others to stay out of the area.