It should be easy to make watertight and to plumb. If worst comes to worst,
you can either lift it or line it. You can also cut off whatever sticks up
where you do not want it. Could be a litle hard to clean out and will have
unique circulation. Do you live where the ground freezes? How far down?
Will it buckle the boat? Sounds like fun to work with and a bit of a hassle
to dig.

Jim

"Pam Gibbs" netdoor.com@gpakt wrote in message
news
I have been reading studying about ponds for a year now and plan to build
one in the spring. I had planned to use a flexible liner. However, my
son
has come up with an intriguing idea and asked me to think about using an
old
fiberglass ski boat that has been in our barn for years. He proposes to
sink about two thirds of it into the ground at the bow, while the stern
would be just above ground level. He has all sorts of interesting ideas
about where to put filters and such and his enthusiasm for the project is
infectious. Before he starts digging that hole I would like to hear from
you all. Pros and cons, advice, is it even feasible, what things might
have
to be taken into account that would not necessarily be considerations if I
use flexible liner, what NOT to do, etc.

Thank you!