I saw a Muir Hill just like that about 15 years ago. It winched a 5 ton digger out of a peat bog here. The digger had sank into the bog with only 18 inches of the machine visible.
The crew arrived with the winch tractor and two cement mixer bottles from concrete trucks welded together as a float. Up and over the top, and slowly, the digger came out. No pics I'm afraid