If you can go under you could try a directional driller depending on the clearance you've got around the footing. You could also core drill through the granite. Are you going into a basement area? I am assuming you need a hole for 3" to 5" conduit?

The last time I had this problem I resorted to directional drilling udner the footing. Thankfully, we had plenty of clearance.

Another thought, is it feasible to penetrate the wall just above the footings, or is there floor slab in the way? Just a thought...

I was thinking the same things as you demobud, but if that is not possible I would think directional drilling maybe your best method.

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Yeah, drilling through granite can get expensive.

Neyc Check this link out a landscaper told me about it...
http://www.borit.com/

I am noy entirely familiar with directional boring. There is some room and some areas are limited on space.
The problem with core drilling is- the wall is 30-60 inches thick of loose stone,granite, mortar and I believe the core will continually jam.

The problem with under the footing is that these are for electrical and the footings are 9-12 feet deep and the run is not long enough to bring the conduit up to the elevation needed where it sweeps up. That is why we need to them at 5' deep.

It seems the only way is to remove some of the footing to create the opening.

thanks for the info demobud, I will let you know how it goes.

Just for everyone’s info:

I talked to one of my buddies here, a concrete cutting company, he states that it is possible to drill through the granite, but as long as it doesn’t have any dirt layers and it is solid, which in your case it does sound like it. It would require a special spec bit to do the work.

You would have to chip away a little bit of the granite so you could mount the core rig.

Price wise he would only price it out on a T&M basis.

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neyc, you could always just use a jack leg rock drill, you would hve to probably drill more than one hole and then chip out the overburden, it's not as neat and clean but it would be cost effective.