So Jerry, you couldn't legally put down a well on your property? We have put a well down by hand here a long time ago by just pounding down a pipe. We watered a garden with it many years ago but took it out eventually. Yes, we were lucky to find the water so shallow. But we knew there were several tiny springs around here that run all the time.
Also when they reshaped the pool about 30 years ago, they had to lower the diving bowl 12" because specification had been changed since the pool was first built. They hit water when putting in the bottom drain and had to put a pipe and pump in to gently pull out the water so they could complete the job. They also put in a hydrostatic valve in case the water pressure underneath became greater than in the pool so it would open and let the water in the pool and not push up the liner. They cemented about 3/4 of that bowl to hold the sand because the water kept, pulling the sand out of shape.
But oddly enough, our ground is dry, dry, dry, and there are two bowl shaped gullies at the back of our property and the neighbors that are deeper than the pool and they also are bone dry.