Cross Bore Information

Call Before You Clear!

If You Have a Sewer Line Clog, Check for a Cross Bore Before You Try to Clear It!

What is a Cross Bore?

A cross bore occurs when a utility line is drilled, or bored, into or through another utility’s line (see image below).

Be Aware of Sewer Backups & Repairs

In the event that a gas line was accidentally installed through a sewer line, the cross bore can create a sewer backup in the home.

Sewer backups can result from a variety of issues. Check for a potential cross bore when determining what is causing a sewer backup. (Customer does not have to have natural gas service to experience a sewer issue due to a cross bore).

Before anyone uses a tool to clear the clogged sewer line, we suggest using a camera to check for a cross bore. If you do not have a camera, call us at 800-458-4251.

Using any type of line clearing tools could damage the gas line, allowing gas to escape. Gas that escapes can migrate, or travel, and enter buildings and homes. Under certain circumstances, the gas could ignite and lead to injury or death.

If you discover a cross bore, call us at 800-458-4251.

The following videos provide some helpful tips and information for homeowners, field crews and plumbers.

Click here for the plumber tip sheet. Para español, haga clic aquí.

Cross Bore Image



To report a natural gas odor or emergency, leave the area immediately and then call 911 and 800-458-4251.