In article , "Leroy Mowry" wrote:
A tree stump the size of Boeing engine core (3 cubic feet) is in a hole
we cannot get out.

Are you sure you aren't being victimized by a "tap root" (a root growing
vertically downwards from the stump)? The stump will seem to be loose, and
jiggle around freely in the pit you've dug, but can't be raised until you
tunnel underneath it and cut the last root or roots.

I know what you're going through - A few years ago, after having a couple
trees taken down, I spent a few weeks gradually getting out the stumps as
time permitted. It wasn't fun.

Art