Thanks for all the ideas guys! I guess where I was getting hung up was even if I make all the stuff above the water disappear, I'm still going to have the stubble below the water unless I either dig, pull, or cut it out. OH THE HORROR!

Problem is that the way the ponds were built the top of the levees are not very wide and they slope at a pretty good angle down to the bottom. Basically they were built into the side of a slope. So, an excavator would be a dangerous thing to say the least. On the one pond I can make one pass with my riding mower. A foot either direction would put me in the pond or rolling down about 12 feet off the back of the pond...

The weedrazor and some spray is sounding like the safest and cheapest option. Not the easiest or most efficient but considering the way the ponds are set up it may be the only way.

Anyone ever tried a gas hedge trimmer or like a pole saw?