Pipeline Location

There are four main types of pipelines: crude oil, liquid, gas and chemical. Most run underground, and are clearly identified by markers along routes that identify their approximate – not exact – location. Typically, markers are found where a pipeline intersects a street, highway or railway. Pipeline markers do not indicate depth or number of pipelines in the vicinity, and the pipeline may not follow a straight course between markers. Every marker provides the name of the operating company, the product transported, and an emergency contact phone number.


Types of Markers

  • Pipeline Marker: The most common marker, it contains operator information, product type, and an emergency contact number. They are typically yellow, black and red – but size, shape and color may vary.

  • Aerial Marker: Patrol planes that monitor pipeline routes use this skyward-facing marker.

  • Casing Vent Marker: This marker indicates that a pipeline (protected by a steel outer casing) passes beneath a nearby roadway, railway or other crossing.



  • Without risking injury, turn off equipment and eliminate ignition sources

  • Leave the area by foot immediately. Try to direct bystanders to leave the area, and attempt to stay upwind

  • From a safe location, immediately call 911 or your local emergency response number. Then, look for pipeline markers and notify the pipeline operator

Natural gas and highly volatile liquids are often colorless, tasteless and odorless. Gas transmission/gas gathering pipelines are odorless, but may have a hydrocarbon smell.

  • Unusual smell

  • Petroleum odor

  • Gaseous odor



  • Quiet hissing to loud roar, depending on the size of the leak and pipeline system

  • Light a match, flip an electrical switch, ring a doorbell, or start a motor vehicle or electrical equipment

  • Come into direct contact with escaping liquids or gas

  • Drive into a leak vapor cloud

  • Attempt to operate pipeline valves

  • Attempt to extinguish a petroleum product or natural gas fire

Recognizing a Pipeline Emergency


  • Liquid pools

  • Continuous bubbling in wet or flooded areas

  • Oily sheen on water or surfaces

  • Vaporous fogs or blowing dirt around a pipeline area

  • Dead or discolored plants in an otherwise healthy area

  • Frozen ground in warm weather


Pipeline Operator Contact Information

Emergency Contact Directory:

  • City of Brackettville 8am-5pm           830-563-2412

  • After Hours Emergency 5pm-8am    830-563-5882

Non-emergency contact information:

  • Phone: 830-563-2412