Metal Detecting With Overhead Powerlines?

I'm not sure if they are high tension lines or not.I suspect they are because they seem to stretch as far as the eye can see.Also, they are hooked up to what looks like oil well structures that are made of heavy metal that are spaced quite aways apart.

I'd have to say it would depend on type of machine you're using and it's strength. I've used an old Bounty Hunter and an Explorer XS in the same area under a set of high tension lines, and the BH was not affected at all but the EXS was picking up static left and right, giving false tones, what have you. I would have to say that there is a great chance that if you're running into problems with pin pointing and target id, the power lines are probably to blame, especially if the machine works great everywhere else.