Thanks guys! The size of the lake itself would be 15-20 acres. There is a large knoll at the top of the site which would be excavated to build the dam, and get the lake to this size. This material is solid clay, perfect for the dam. In areas around the site theres good silty clay with places of clayey sandy gravel. The land itself is in Louisiana. There is an 8, 30, and 190 acre lake between 1 and 5 miles away. I am looking for a minimum of 15 acres because of what I've read about needing this surface area to get a healthy population of bass and crappie(sac a lait).