The least amount of water you can deal with the better. Worked on a ground water lake in Florida. Equipment worked in the water the material was like beach sand the pans picked up the material and hauled it off. But the pump still worked 24 hours a day. Most of the time equipment must be kept out of the mud and it can only handled with trackhoe and dump trucks. do not get it to big of a hurry to start with there will be plenty of time to rush once the dirt starts moving.