if this is inground or an above ground you will need a pool company to
evaluate the problem. see:
http://bcpools.com/poolpics.html

wrote:
Hi,

My friend's 33 year old swimming pool is about to cave in. It is made
out of vinyl siding.
How does one know when a pool becomes dangerous to swim in? Does
anyone know if there is a way to fix this problem?

Thanks