One of the well drillers I work with has a custom made set of dowsing rods that he uses to find buried utilities with astonishing accuracy (I've tested him several times by withholding known information). I've tied it myself a few times with mixed results. I found its a little too easy to manipulate the rods (so to speak!) by slight hand pressures especially if you are predisposed to something being there. I will say this though, if Paul (the driller) says there's something there, we move to another spot. I think you have to have a natural ability to be able to do it.