Sounds like my experience. I stopped the first pond digger last week after the pond kept shrinking. I sprayed Roundup around the original flags he placed so I know where they started out. When the core trench was started 50 feet in from its original design, I asked him to stop and tell me what I owed him. I paid him and hired a new guy to continue. I shared my story with the new fellow and asked that he not take on the project unless he could complete it as designed. So far I am pleased. If the pond gets completed and holds water properly, I have a couple more projects for him. He brought in the proper size equipment whereas the previous fellow simply had a dozer that was too small and could not cut away the grey clay. We just got the first good rain since May, so I will be curious how the new hole looks. Best of luck to radman1420 on completion of his project.