As I've mentioned in a few previous post, I am in the planning stages of building a small (1.5- 3 acre max) impoundment. The land site is a heavily wooded, fairly flat river bottom with a nearby backwater lake that could be connected too via ditch or pipeing. The lowest, most suitable portion for the impoundment is at water level. When I dug a few holes it is moist top soil for a few inches, then watery river sand for a 12"- 20", then it appears to hit clay. As I shoveled the holes they filled back up with water just as fast as I took it out. Kind of like digging hole at the beach. There is a natural rise of about 2 1/2' of berm around the edges of where I'm looking to build it. My original thoughts were to enhance the berms, install watercontrols and flood it but I don't think I can afford to keep it pumped full of water. I believe it will weep through the sand back into the water table. My next thoughts are to dig it out down to the clay but it will be filling up as fast as we dig it obviously, and water level will be uncontrolable for the most part. My main equipment is a IH/Dresser 175c track loader and to be honest I'm a little nervous about getting it in the water and getting it marred up. It's running on the skinnier tracks after all. Any of your thoughts or experiences will be appreciated. I'll try to take and post some pictures tomorrow if that will help.