The dredging only occurred one time from 1971 -1980. they have dredged many times after the money find and prior to 1971. they even have there own dredge now.
It's possible they piled the sand further down the beach for spreading. that makes more sense than trying to spread it over a long distance from one area. this could explain the lack of a lot of bills or fragments showing up, but they did check a lot of other area's. now, we also have the Fazio's, or the FBI claiming the sand was only spread 50 yards in each direction? this doesn't make sense since so much sand was placed on the beach, and the of course we have Palmer identifying the dredge layer past the 50 yard mark.
I tried to get the Learning channel to do a test with a dredge and a bag of money, but finding a dredge to fit the needs was not as easy as one thinks, so it got trashed. I'm not sold that it would destroy all the bills. I'm guessing some would escape, and I'm just not sure what the pump would do to the bag. we know for a fact that objects can get through the pump, but these were metal objects, 60 feet of chain, welding tanks, cannon balls etc.
I'm still wondering if they used the rubber bands to bundle multiple bundles vs single. this is not uncommon. now, to confuse things more, I think it was Tina stating that they had bank type bands on the bundles?
The FBI sometimes described the bills as a "wad, or clump" this could be consistent with pushing the sand causing the wet bills to compact, or clump, but doesn't explain them remaining together as one unless they were stuck together for several years. then you must question what the rubber bands would do going through the dredge. pieces of the bills shredded would also be in the mix while spreading the sand.
NMIwrecks (a diver) explained that water would be a preservative, and would not destroy the bills. this is not paper, so it wouldn't of dissolved. if the bag was wrapped tight it should of turned them into a brick (speculation) IMO.
I was really looking forward to proving, or debunking the dredge theory, but sadly this didn't happen. things need to be eliminated to try and help figure out what exactly happened with the money found on Tbar.