A tractor with a large scoop

Pipeline Locations

Emergency Info

Suspect a natural gas leak?
Call 911
And Southwest Gas immediately at
whether you're our customer or not.

Si usted sospecha una
fuga de gas natural,
llame al 911
Y a Southwest gas al
Inmediato, si usted es nuestro
cliente o no.

A natural gas pipeline marker on the side of a highway.

Underground pipelines can be located anywhere, including under public roads, railroads, street intersections, open fields, and on private property.

For your protection, line markers are used to indicate the pipeline’s approximate location. Calling 811 is still required for marking the pipelines.

Pipeline markers:

  • Are yellow
  • Are typically seen where a pipeline intersects a street, highway or railway
  • Are NOT required for all pipeline facilities
  • Do not indicate the pipeline’s depth or exact location
  • List emergency telephone numbers in case of a natural gas emergency

Make sure markers are left undisturbed to help remind everyone that natural gas lines are in the area. Additionally, below-ground markers, such as yellow warning tape or mesh, may be present to warn excavators to the presence of buried pipe. If this below-ground marking tape is encountered, stop work immediately and call Southwest Gas.


The Southwest Gas service territory map provides general locations of our transmission pipelines. Lower pressure distribution mains and service lines connected to the gas meters at homes and businesses are not shown.

To locate natural gas transmission lines operated by Southwest Gas and other companies, visit the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration National Pipeline Mapping System (NPMS) website.


Encroachments into the rights-of-way may increase the chance of third-party damage, and often occur when excavation or other construction activity occurs near the pipeline and the pipe is accidentally struck. Excavators should contact Southwest Gas if they have any questions concerning pipeline rights-of-way and remember to always call 811 at least two working days before any digging, blasting, or boring project.