Had ~12" of rain on Labor day and on the 2nd time draining water out of the pool, noticed that the liner was floating in several places. Mainly the areas were at the walls, but a couple were in the deep end close to the main drain.
When the pool was built I had the pool builder plumb a 1-1/2" line from the gravel bed under the main drain up to the pump suction header. I panicked when I saw the liner floating and decided to open the valve with the pump lined up to waste. I ran the pump with this line-up for about 3-4 minutes before I started to see alot of sand through the filter basket lid. The liner still was floating after I shut off the pump, so I figured the water table was so high that there was no use worrying about it until the rain stopped and the water started to drain down. Well, after everything dried up this week, I inspected the pool and there are several places that look like depressions under the liner where the sand and pool bottom (cement/vemiculite) but luckily enough. FInally got in the pool today (80 degrees) to check out the depressions. The surface under the liner is firm so it appears there is no voiding or water there. The line doesn't appear to be stressed or stretched at the attachment groove, so I guess everything is still ok. Right?
My question is what is the right thing to do when the liner floats after a rainfall like this that saturates the ground and raises the water table?
thanks for any input!