Cross Bore

What is a cross bore?

A cross bore is when a natural gas pipeline passes through a small segment of sewer pipeline. This can happen when natural gas pipes are installed using trenchless construction methods. Although these situations are rare, it can be the cause of sewer lateral backups where the sewer line is not able to work properly.

If you received an Upcoming Sewer Line Inspection Notice

The notice does not indicate that your sewer line contains a gas line. To ensure continued delivery of safe and reliable service, Long Beach Utilities Department (LBUD) would like to complete an inspection of your property's sewer line to verify that there is no existence of a cross bore. Please follow the instructions provided on the LBUD notice. For any questions regarding the upcoming inspection, please call (562) 570-2140.

WHEN CLEANING OUT A SEWER LATERAL

Whether doing it yourself or hiring a licensed plumber, Long Beach Utilities recommends the following actions:

1. Before you begin:
   • During regular business hours call 811 for utility line locations. This is a free service and may help identify intersecting lines.
   • An inspector is available 24-hours a day, 7-days a week to locate your gas lines. Please call (562) 570-2140.
   • Look for an exterior cleanout fitting and use when possible.
2. During the cleaning:
   • We DO NOT RECOMMEND that you use a cutting tool.
   • We RECOMMEND that you use an in-line camera inspection device to identify the cause of the blockage.
   • If you see orange or yellow pipe, DO NOT PROCEED. Call (562) 570-2140 immediately. We can quickly verify that there is not a cross bore and that it is safe for your plumber to proceed with clearing the sewer line.
3. When finished (if you HAVE used a cutting tool):
   • Check the blades for yellow or orange plastic when it is withdrawn from the sewer line. Natural gas utility lines are typically made of this color plastic.
   • If you smell natural gas or suspect a gas leak, CALL 911 IMMEDIATELY from a safe location away from the odor of gas.
   • Bubbles in the toilet may be an indication of a gas leak.

   BE SAFE

   It’s important to keep in mind that natural gas is flammable and that even a spark can serve as an ignition source. For your safety and for the safety of those around you, be aware that any of the following signs may indicate the presence of a gas leak:

   SIGHT - Bubbles rising through standing water or in toilet bowls
   SOUND - A hissing, whistling, or roaring sound at the sewer cleanout, sewer vents, or inside the structure served by the sewer line
   SMELL - The distinctive odor of natural gas at the sewer cleanout, sewer vents, or inside the structure served by the sewer line 

   Have another question or an emergency?

   For any gas related questions, emergencies or after hours please call our dispatch line at (562) 570-2140

    

Examples of Cross Bore

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