The depth of cover and right-of-way width may vary.

Plastic Sign

How can you tell where a pipeline is located?

The U.S. Department of Transportation requires the use of signs to indicate the location of underground pipelines. Markers like these are located at road, railroad, and navigable waterway crossings. Markers are also posted along the pipeline right-of-way.

The markers will say "Warning Gas Pipeline" and will have AOG's Name and Phone Number where we can be reached in the event of an emergency.

Are pipeline markers always placed on top of the pipeline?

Markers only indicate the approximate location of the underground pipeline. They are normally not placed directly on top of the pipeline.

Pipeline Casing Vent

It's a federal crime to remove or deface a pipeline marker sign.

Safety is Everyone's Responsibility. Pipeline marker signs are important to public safety.

Landowners & Right-of-Way

Because pipelines must cross the countryside to deliver products over long distances, the pipeline has many neighbors. The pipeline crosses under creeks and rivers, highways and roads, farmers' fields, parks, and may be close to homes, businesses or other community centers.

Written agreements, or easements, between landowners and pipeline companies allow pipeline companies to construct and maintain pipeline rights-ofway across privately owned property. Most pipelines are buried below ground in a right-of-way. The working space needed during initial construction may be temporarily wider but the permanent right-of-way width varies depending on the easement, the pipeline system, the presence of other nearby utilities and the land use along the right-of-way. Many of the rights-of-way are 50 feet wide, but may be wider or narrower in specific locations.

These rights-of-way are kept clear to allow the pipeline to be safely operated, aerially surveyed and properly maintained. Pipeline companies are responsible for maintaining their rights-of-way to protect the public and environment, the line itself, and other customers from loss of service. This includes keeping right-ofways clear from encroachments of any kind including buildings or structures built on top of AOG facilities.

While permanent pipeline markers are located at roads, railways and other intervals along the ROW, these show only the approximate location of the buried pipelines. The depth and location of the pipelines vary within the ROW.

National Pipeline Mapping System (NPMS)

To receive additional information about transmission pipelines that might be located in your community you can access the National Pipeline Mapping System (NPMS) at www.npms.rspa.dot.gov. For more information on pipeline safety access AOG's website at www.aogc.com or www.pipeline101.com

Signs of a Natural Gas Pipeline Leak:

Despite AOG's best efforts and government oversight, leaks from pipelines do sometimes happen. The best ways for you to detect a leak in your neighborhood is to use your senses of sight, smell, and sound. You may have a leak if:

	you see dead or discolored vegetation that is otherwise green along a pipeline ROW, or see dirt or water blowing near the pipeline ROW;
	you smell an unusual or pungent, sulfur-like odor along a pipeline ROW;
	you hear an unusual hissing or roaring sound along a pipeline ROW.

What to do:

• Leave the area immediately.
• Call AOG toll-free at 1-800-842-5690 or 1-479-783-3181 & give the location.
• Warn others to stay away.
• Keep ignition sources away from the area and avoid creating a spark.