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As you may be aware, Williams operates a high-pressure natural gas transmission pipeline in Lower Gwynedd Township and throughout Pennsylvania known as the Transco pipeline. You may be familiar with your local public utility company, which receives its natural gas supply from pipeline operators like Williams.

While you may not give our pipeline much thought, it is important to Williams that you are aware of its presence and that you are able to recognize and respond to any unauthorized activity or abnormal conditions. The safety information contained in this letter will help prepare you for the unlikely event of a pipeline emergency.

Caution: Working Near Pipelines

If you plan to dig or perform any types of excavation near the pipeline right of way, be sure to dial 811 at least three business days before you begin. Dialing 811 will connect you with your state’s One Call service, which will help protect you from unintentionally hitting underground utility lines. After you call, a company representative will identify and clearly mark the location of our pipeline if it is in the vicinity of your planned excavation work.

Locating Pipelines

You may have noticed the yellow Williams pipeline markers located near roads, fence crossings and curbs. Although these markers are used to alert the public of the presence of one or more pipelines, they do not represent the exact location of the pipeline. If you wish to learn more about the location of our pipeline and other pipelines in your community, visit the National Pipeline Mapping System on the Internet as

Leak Recognition & Response

Although rare, a pipeline leak or failure is a serious situation that can be dangerous. It is important that you may know how to quickly respond to a potential pipeline emergency. Use your sense of smell, sight or sound to help identify a potential natural gas pipeline hazard.

  • Smell- Strong petroleum scent or other pungent odor, a smell similar to rotten eggs
  • Sight- Dead or dying vegetation near the pipeline, dirt blowing into the air, fire coming from the ground
  • Sound- Hissing, blowing or loud roaring sound

If you suspect a pipeline leak or failure, your personal safety should be your first concern. Follow these steps:

  • Evacuatethe area and try to prevent anyone from entering the area
  • Abandonany equipment being used in or near the area
  • Avoidintroducing any sources of ignition to the area
  • Call 911or contact local fire or law enforcement
  • Notifythe pipeline company (Transco emergency gas control: 800-440-8475)
  • Do notattempt to extinguish a natural gas fire, and do not attempt to operate pipeline valves

Your personal safety is important to us, so please take the time to share the enclosed information with others in your household. We appreciate your interest in operations. If you ever have any non-emergency related questions, call us anytime at 866-857-7094. You can also learn more about our operations on our website

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Lower Gwynedd Township

Administration Building
1130 N Bethlehem Pike
PO Box 625
Spring House, PA 19477

Phone: (215) 646-5302
Fax: (215) 646-3357

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