Reno,
Maybe you can answer this question.
Would it work in your area, to weld a cheap Carbide concrete bit on the end of the ground rod, or braze if you are using a solid copper one, and then drive the rod with your sds hammer drill?
I have a couple of area's here on the rail road where the rock is sticking up out of the ground, and where do you think the relay boxes go? That saves them from getting run over by lawnmower man!
TW
