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Method and apparatus for underground line crossing detection

  • US 8,555,722 B2
  • Filed: 09/17/2009
  • Issued: 10/15/2013
  • Est. Priority Date: 09/17/2009
  • Status: Active Grant
First Claim
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1. A method for detecting contact between an underground electric wire conduit and an underground utility pipeline comprising the steps of:

  • imparting a detectable signal onto an electric line wire disposed within said underground electric wire conduit, wherein the detectable signal is a vibratory signal;

    monitoring said underground utility pipeline for a presence of said detectable signal; and

    detecting said detectable signal when there is a contact between said underground electric wire conduit and said underground utility pipeline.

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