Elanor, Jack, and Steve watch the big digger driving off of the flatbed trailer. Jack was extremely excited!

The guys used the digger to take out bushes, small trees, some stumps and a layer of dirt. Then they marked the edges of the pool. Normally they would use stakes, but there is a lot of rock under the dirt. The stakes kept breaking so they built these markers.
They hit white rock at a depth of about 1'. White rock is limestone. Some of it was crumbly and some of it came out in huge chunks. The general consensus is that we don't have to worry about this pool moving or cracking. We also don't need to worry about water seeping into the hole. This rock is one reason why basements are non-existent in our part of the world.
At 6' they hit blue rock – shale. I didn't know we had blue rock here and Bill, our pool guy, was also surprised. They have a special rock puncturing tool that replaces the bucket on the end of the digging arm of the digger. It was sort of like a jack-hammer on steroids.
By 4:00 they were done. Tomorrow the steel (rebar) and some of the plumbing goes in. I'll show you what that looks like then!
The general consensus is that this is just about the perfect sized pool. Not too big, not too small. I will get to look out my studio window at water all year round. Oh happy day.