You should have watched Gardeners World BBC2 on Friday. they constructed
huge clay pond the salient fact being that the clay must be at least 18
inches thick and must be tamped down preferably by machine and once filled
will need to be topped up two days later as the clay will absorb the water
necessary to make it watertight.
I am only passing on what I have heard.

--
Miss Pent
remove the sword before replying

"Tumbleweed" wrote in message
. ..
| "Nicholas Walker" wrote in message
| ...
| I've recently scooped out an old silted up pond in my garden which
filled
| up
| and overflowed every winter but dried out in the summer. It's a fairly
| large triangle of about 20 yards each side. It takes four days to fill
| with
| a hose and then two days to drain. The clay base (of unknown thickness)
| seems watertight, but I reckon it's leeching out where the clay meets
the
| topsoil sides.
|
| What are my options? It's a bit big for a liner snip
|
| It isnt too big for a liner, just expensive :-)
|
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| Tumbleweed
|
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