Good Dozer operators are able to do it in certain circumstances. Don't rule it out, check with some of them. Around here, I know of a couple that could probably do it. One of them starts in an area and goes down into the pond pushing the muck. At the same time he peels up just enough dirt from the bottom to start creating a false dam so the muck doesn't come back at him. Since the muck is fluid-like it flows away as he keeps pushing the false-dam into it. He then takes a backhoe from an area up on solid ground and starts dipping out the muck and hauls off with truck, unless of course you have a spot near by that it can all be pushed to. Be aware though, it takes a lot of room to spread it out.
Dale's idea works too if it can be dried up some. Kind of what I did when I started.
