We are replacing our current pool next spring. The pool is 19 years old and this will be a preemptive replacement before the wall rusts completely out at the bottom and blows out. I siphoned the water out but rain is of course refilling it. I want to leave the pool where it is so rain, etc doesn't wash the sand away over the winter. I want to keep the water out so I am not dealing with a mess come spring. There is a pad under the liner that runs about 12" up the wall. If I were to poke a few holes in the liner, would the water be able to get out or would it be trapped by the pad? I have the pool cover pump and could buy a larger sump pump if necessary.