Big Dent in bottom of pool

[homeschoolmoxy]

Tonight I noticed a big dent in the bottom of our pool about 4-5 inch diameter and about 4 inches deep about 1 1/2 feet away from the side wall. We have no idea what could have caused that. It looks like a cannon ball was dropped in it.
Our pool is just over a year old and we're worried that this could cause the liner to rip or tear. I'll call the pool guys tomorrow, but it will probably be a few day before they can come and since it's been a couple weeks over the 1 year mark this is probably not covered under warranty. :grrrr:
Any thoughts what to do?

 

[JohnT]

It could be the result of a small leak there.

 

[woodyp]

Could alo be result of water washing down that side of pool, i.e. bad drainage there. Or draining right to the pool there. I have a divot on one edge of mine I KNOW was caused by a flash flood right after the pool was installed.

 

[homeschoolmoxy]

Could it be a mole or some other kind of animal that dug a tunnel there?
Should I worry about it? Will it get worse? It definitely was not there yesterday.
How would we fix that without draining the pool?

 

[poolgranny]

Good luck hope you can get it figured out.

 

[iSmile]

Hi I have extremely limited experience and do not want to dismiss what could be worth much concern. But I thought I would share that my in-laws had an AGP for 35 years, well past its life expectancy. Last summer was the first summer without it, as a matter of fact. But that thing had a sink hole very much like you've described, only bigger, for at least the 20 years I had swum in it. It was unexplained, but had no ill-effects on the function of the pool. I hope that eases your mind a little as you work to solve the mystery


Southeastern Indiana, USA
27' x 4' 17,600gal AG round
1.5 HP 1 speed pump
22" Ecco sand filter

 

[homeschoolmoxy]

Service department in not open until Monday
Today I noticed another smaller dip about 1 foot over from the big one. Thinking more and more that it must be from an animal :?

 

[savdoc2]

I have what I think are mole trails under my liner. I first noticed them 5 years ago. There are a lot of trails, but I have not noticed any liner damage.

 

[iSmile]

Anything to update from OP?


Sent from my iPhone

 

[homeschoolmoxy]

Well, not really. I called the pool place twice and they told me that they would call me back, but that they are very busy :grrrr:
I noticed another big dent on the opposite side of the pool close to the edge, too
We looked around the outside edge of the pool, but could not see anything suspicious at all.

 

[richhie6]

I have found the same sink hole over the weekend. I am waiting for a return call from the pool builders, so hopefully hear something soon!

 

[cramar]

Is the water level holding?

 

[richhie6]

Water seems to be holding.

 

[Durf]

I have the same type problems. Pulled liner this spring, releveled ground, problem fixed right? Wrong. My ground has leveling issues, probably caused by rain and or the fact that we brought in 20 truck loads of dirt to build up our sloped yard. We packed it tight 2 years ago when we built but it seems to be still settling.

 

[richhie6]

We had pros do the install. No major build up and sand is under the liner. Not sure how or why, but hopefully get these pool guys out here in the next day or two.