If that was possible, that's what I would do. I'd also make sure that the pond basin was packed well with a sheepsfoot roller. With a pond that size, I'd take every precaution that I could to avoid a leaky pond.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).