I have just completed my Pond Muck removal project.
You are right about a big project for a little tractor.
As followup on Jinman's post, is the silt good for anything? Top dressing? I know as far as soil goes, silt is probably sterile, which is not a good thing.
I would think it is pretty high in organic material from all the stuff the ends up in the pond. Aren't river deltas etc historically very fertile because of the annual loads of silt they (used to) get?