Wiktionary
cross bore
n. An intersection of an existing underground utility or underground structure by a second utility resulting in direct contact between the transactions of the utilities that compromises the integrity of either utility or underground structure.
Usage examples of "cross bore".
The cross bore the snarling image of a treecat (rumor said that then-Crown Princess Adrienne's own 'cat, Dianchect, had sat as the model), and eleven people had won it in the two hundred and fifty T-years since it was created.
Even now, at the end of acceleration to half lightspeed and deceleration to a few hundred kilometers per second, the Cross bore several tons of reaction-mass mercury.