Spongy Ground

[AnnaK]

I would, just to see what's in there. And how big/deep it is. Could be an abandoned rodent den, could be pirate's treasure, could be where someone had buried a pet. Probably ought to be filled in before you locate a pool near it.

[BigDave]

Remember to compact the soil you use to fill the hole or you might as well build the pool on the spongy spot.

[bradatkins]

Well I dug it up, and turns out there used to be an old tree stump a couple of feet down. It was the spongy culprit. I dug it out, put a few shovel fulls of dirt in at a time compacted, put a few more, compacted, and so on until it was full.

[AnnaK]

Glad it wasn't a pet grave.