On May 16, 8:43*pm, wrote:
* * * * I would like to put a fence up at the back of my yard, but it
would need to go in over existing underground high voltage wires. *Not
the usual 220V but the main underground lines to the local
transformers. *

* * * * I have had the crew out to mark the line locations, but they
are unable to tell me how deep they are. *I would guess they know
where they should be, but because of various problems, they may not be
as deep as the should.

* * * * Any suggestions?

* * * * *I am thinking of several possible fence types, generally
decorative but also I am interested in keeping the neighborhood kids
out of my yard and since I am on the local foot path, eliminate the
foot traffic of kids taking a short cut.

The separation required by your states version of the public utilities
commission is what you have to comply with. I have never seen a case
were any permanent structure was permitted directly above the lines.
High voltage lines are usually buried in the public portion of the
road easement anyway and you cannot lawfully build there. You may
need to spend the money for a survey if you don't actually know were
your lot line is. I really doubt that the utility has buried anything
right on your property line.

--
Tom Horne