Thanks Dave. I am located in northeast Iowa and I went out and measured my proposed location and I would do something close to 50 X 100, but I think in a U shape. I do have the problem of long, cold winters (although it is 72 today!) so I would plan on going around 15 ft. deep too. I will do a search for 0.1 acre on the forum and see what I get. Thanks again for all of the help.