I've got a 5 acre pond that was dug on an existing bog about 50 years ago. Since it was an old swamp to begin with, the bottom was all muck. The ground got too shaky for the dozers and they stopped with the deepest part being about 8 feet. It's always provided great fishing and has never had a winter kill (it is aerated). I'm worried that the muck will just continue to get thicker and the pond will get ever shallower. The high nutrient content of the muck has always created a weed problem but that is now controlled with grass carp (almost too well). Is there any way to deepen this pond? Could there be clay under the muck if we go deeper? Would the best option be draining and digging, digging some deeper holes with a dragline excavator, or using dredge equipment? HELP!