"W.D." wdanis at NO SPAM dot yahoo dot com wrote in message
...
Tried the drilling solution w/a 5/8" diameter 13" long masonry drill and
couldn't even punch through the concrete! I was able to get down about
3-4"
after about 15-20 minutes of effort but that was it. I'm wondering if
there
is some kind of steel basin that the concrete was poured into that the
drill
bit can't penetrate? I paid $15 bucks for a decent bit so don't think
that's
the issue. Weird...

For holes deep in the concrete you need what is called a hammer drill.
While the bit turns it also moves up and down to help punch the hole.