Removing the beaver dam was a lot of dirty hand work. They are some engineers. All manner of materials involved; from a 30 foot log to countless beaver cut 2-6' pieces, and everything inbetween. Also lots of rocks - some 1/2 size of basket ball - most softball size. They, the last I knew, did not have access to a FEL, yet there was yards upon yards of mud involved also. Quite impressive.
Of course, it was fun, until I drove the tractor a "little" too far forward, onto the loosened dam. : /forums/images/graemlins/crazy.gif I receive that sinking feeling..Had a logging winch on the 3PH, so I got out OK.
The "hook", best I can tell, is actually the main piece (don't know what it's called), from a horse drawn plow.