Canepole, word of advise,if you decide to put old cars in your pond as Sunil has suggested, be sure to remove the door & window handles. I have heard stories of people that have hooked record size fish but could not get them in because they would get hung up, It was latter found out that the fish were simply getting in the cars and rolling up the windows.
Seriously how big is your water shed to feed this 7 acre lake. I am just curious because I am currently working on the design of approximately a 4 acre lake(want be near that deep) but the fill area looks much like your pond site.
