Pond Boss Forums POND CONSTRUCTION Selecting a site Soil compaction

Brettski:

I believe CW would say put down a slab over concrete footers going down to nice, solid, virgin subsoil. This would obviously cost more than just a slab or your concrete piers approach, but would have the benefit of giving a vermin-proof floor for your cabin or, if you raise the cabin floor up, crawl space (so you never have to have a skunk teach you your floor is not impervious to methyl mercaptan!).

Perhaps if the topsoil were scraped off, the subsoil could be compacted sufficiently to put the slab on it directly with the likes of a vibrating shep's foot roller (they certainly do wonders for dam cores).

Unless someone here who is a LOT more confident about this provides input, you should really get the opinion of a good soil (engineer) or trustworthy local builder with local soil knowledge.