the soil is wet and loamy and a lot of rock down around 10-12 feet or so..
i live and work just outside of louisville, ky.
if the rod at the barn reads greater than 25 OHMS a second rod will be driven. then you must bond the two together and hope for a reading less than 25 OHMS or drive another rod and another unitll you get it right?
i call it overkill, but nothing is more important than a good ground!