40 year old pool needs new liner

[Mwoe's pool]

Hi there,
The liner ripped over the winter but the pool, backed simply with sand has no main drain. The water table is pretty high and we can lower it to a few inches with the pump, but as soon as it is shut off, the water rises. We are not attempting to replace the liner ourselves and had been trying to wait out the ground water. Doesn't seem that is going to happen. What can we do to remove the water so the pool company can replace the liner?

Thanks in advance!