I appreciate your concern Warren, the pond is currently at a level that is below the horizontal pipe the goes through the top of the dam. Therefore, there should not be any massive flowing of water during the vacuuming process. Do you have any advice on creating a vacuum using the 4" corrugated pipe? I also plan on attaching a pipe, like 1/2" EMT to the suction end of the 4" pipe to use as a sort of handle to direct the 4" pipe where I want it. What I am attempting to do is dredge the mud from around the pipe sort of like they do at Mexico Beach if anyone is familiar with that process.

I'm sure that all of this is as clear as muddy water. Lol

Dean