You might find this of interest,
http://groups.msn.com/TheOldGardenPo...nw?albumlist=2
someone in the Old Garden Pond group did exactly the same thing, this is a
look at how their project went.

"Gjlwilliams" wrote in message
...
After 18 years the wife says the above ground pool has to go to make way
for a
pond. So where do I start? I'm looking at something that will be about 20'
wide
by 3-4' deep. So I'm looking for info on how, what and where. The pond
will be
located on a north facing slope with sun about 3/4 of the day, located in
SE Pa
if that makes any difference. Thank's

Gary W.