While you are on the subject of dredges. I have a lake in my area. when they drain this lake, there is a spot that is still a couple feet deep, with at least several more feet of mud below that. In this mud there are WITHOUT ANY DOUBT, many GOLD RINGS, a posability of over 20 Slot machines, along with the spilled coins from them, the number of slots is an estimate.? I have already retrieved 2 of them. Plus the posability of other lost, discarded & purposly hidden items. Would a Dredge work to get these items, or would items like slot machines be too much for a dredge ? ARMY CORP IS GOING TO DREDGE THIS LAKE WITHIN THE NEXT FEW YEARS, But They Will Not Dredge This Spot.