Cross Bore

Published: May 12, 2017 | Last updated: July 5, 2023

What Does Cross Bore Mean?

A cross bore is the intersection of one underground pipeline, conduit or other utility by another pipeline conduit or utility that results in direct connection between the services of each. .Cross bores disrupt the flow within, or integrity of, either of the pipelines, conduits or utilities where cross bores occur.


Trenchlesspedia Explains Cross Bore

Cross bores can occur inadvertently between trenchless installations and existing gas lines, sewers and other underground utilities when these utilities are unmapped or otherwise unknown to the trenchless contractor. These unintended intersections can diminish water or sewer flow, flood cable conduits that are crossed by newly installed water or sewer facilities or even explode when a trenchless operation bores into a gas line. According to the Cross Bore Safety Association, Minnesota’s office of the State Fire Marshal and Office of Pipeline Safety are the first organizations in the U.S. to regulate trenchless technology in the matter of cross bores.


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