Believe it or not, my hubby dug this ENTIRE thing out with a shovel and wheelbarrow. It used to be four feet deep at its deepest, but we just barely drained it last week and it is now all the same depth of about 2 feet of sludge. So......he decided to make it bigger and is in the process of deciding what to do--a never ending process. It has no liner....YET! He is going to rent a backhoe and get it deeper before he does that. What the latest decision is.....dig it out, put a liner in it, put two nice pumps in it and make it a SWIMMING POOL, and then we will dig ANOTHER one in the back corner for the ducks while we have the backhoe. So excited about it. We will fence around both water holes so that my ducks can't get into the pool. We have to get some more willows planted in the back corner for them...they are nice cover for the ducks, they stay in there quite a bit in the heat of the day. Can't wait.