[mdvaden]

I've never needed a liner that large, but I saw a refence by a garden doctor type website, to a 65' x 100' liner.

Another site listed what they sold through Firestone. Sizes ran up as big as 50' x 200'

[perfect touch]

I have done about 4 ponds with liner and I like liner because it is cheaper way to seal the water, make sure you get at least 45 ml epdm, Remember water leakege is hard to figure out where it is and have your thought if it is just evaporation, the bigger the surface and if she has running watter feature it adds the evaporation 100X 100X remember x 7 and because if it so large you have to remember it is 7feet deep on both sides so that is 14Ft not 7 . If you want the cheapest liner i would greatly sugest ordering on line i forgot cite where i got it, but it beats getting at 30cents a sf. One thing i dont li,ke about liners is if you place it you need to make sure u place something soft under neight or sand , the cheapest way is you can use carpet foam or there is plenty of other materials that will last a long time and rocks under neight will not puncure it.

[familyguy]

My only comment is this:

If she has tried other methods that don't work, why experiment again? Go with a PROVEN method. LINE THAT %$#&%* thing! You have done your research and a group of professionals have pretty much all recommended lining it. That would be enough of a selling point in my opinion.

[nylan]

Nationally recognized garden??? Doesn't sound like these are the sort of customers to take short cuts. A liner will run about $4000.00 but what if you try something else and it doesn't work. That is just throwing money away. Also your reputation because you are the one advising her!!
Basing this only on the information you have given us, it doesn't sound like drainage will be an issue, so i would not worry to much about springs under the liner. Put in the liner, look like a hero and cement that customer relationship.
Go to www.bendtarp.com and you can order the perfect size right on line.

[Stonehenge]

Re: sourcing the clay - we got it bagged from a local supplier. 50# bags, something like $4-5 per bag.

Re: liner - I don't recall what the break point is, but on really large water features I don't think the usual 45mil epdm is recommended - don't recall why. Maybe it's the weight of the thing. But I believe if you look at aquascapes literature they'll advise you to use their 20 mil non-epdm stuff for ponds that are 100x100 or larger (again, this is coming straight out of the memory banks, so you'll want to verify this). I also researched a woven liner that a competitor used on a large project. The stuff seemed extremely tough.

[perfect touch]

All i think when i see number 100 x 100 and probabbly by 20x for the depth is a heavy liner about 400pound maybe more . Depending on deapth at the begining of pond I would recomend covering liner with river rocks or some kind of rock so you dont see the liner, with time it will be mostly covered with algae but begining you will be able to see it depending on how murky water is. And make sure you install it with matt side up , so it dont shine under neight. But you will need some professional equipment just to install liners are heavy and you got to place it right before your unpack it. Naturally if you think about it pongs that are the size that she has is not really intended to be protected, and even if you put liner you will get a about couple of inches of evaporation a day, so that is quiete a watter bill refiling it. Offer a automation self refiller.

[Fine Edge]

The water treatment plant a mile from our shop installed a liner for one of their new holding ponds and I haven't noticed anyone trying to fix it yet. Install was 11 years ago. Don't know what it was made of but seems to be working very well.

[Paul]

I'm not sure of it's price but if they want a liner this company makes a bentonite liner http://www.cetco.com/LT/

[Stonehenge]

That is slick!. A roll of bentonite clay liner!

[trees]

I second the slick! sentiment. Now all I need is someone that wants a great big hole in the ground. Hmmm.....

[4seasons]

so your trying to tell me that muskrats arent gonna dig thru the clay liner? they'll tear it up just as fast as rubber.

[Nathaniel Carr]

4 sea,
The thinking was that the bentonite would be "self -healing"

But forget all that!!!

The roll out liner from CETCO is going to be the solution. The rep just sent me reams of info. When I read it all I will update the group.

Thanks Paul!

[Paul]

No one never said that landscaping landfills wasn't worth all that money.

[Nathaniel Carr]

I didn't get the job. The owner just couldn't bear to line it. She liked my proposal but she chickened out. I should say that her other landscaper told me that she was real wishywashy on this one.

But I did make some real progress finding large scale alternatives to rubber liners. The Akwaseal product looks real straight forward. There is a big time excavation contractor near hear that swears he will never use rubber again. His jobs are 100x100 up to acres. His company also maintains the ponds and says that there are no long term issues with proformance.

Does this link work...
http://www.akwaseal.com/Akwaseal%20Design%20Manual.pdf