I was sure I'd asked this question a few months back, but I searched and
could not find the original post.

I want to put up a pump house with water wheel for a small pond. I plan on
renting a 'Little Beaver' to dig the holes for my supports. I also want to
put up a small garden shed. So I was thinking of digging some holes, filling
them with compacted gravel and putting foundation blocks on the gravel to
support the shed. I'll probably dig the holes about 3' deep for both the
shed and the pump house. The shed will have nothing but gravel in the holes
and the pump house holes will be started with gravel and then enough
concrete to hold the posts in place.

The frost line is about three feet down, although with the warmer weather
heaving seems to be less of a concern. It just seems that a concrete slab is
overkill for a small (10x8) garden shed?