The cable has to come up some where... and that some where should have a
cable tone that is detectable.

OP can mix up some orange Tang, and pump that into the conduit. Go around
and look for the orange stain.

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"Bob Engelhardt" wrote in message
...

The problem with that is that the cable is in conduit, which acts as a
magnetic shield

Another method would be a signal injector and it's tracking receiver.

Same problem.

Bob