I just had a guy come out and look at cleaning out my pond. He said that a coffer dam was the right way to do this. We also found that my original drain pipe is rusted out the whole 150 foot. We will have to dig this out also. The good thing is its only 10 foot from the trench we dug origaninally. So they can get a two tractor width when they go to pack the clay. My question is, plastic pipe or galvanized pipe for my main overflow and coffer dam? And should i use a T on both of them?
