Bob,
You promised to provide us all with proof that debris from the area between the two bridges could not arrive at Tena Bar. I'd love to take a look.
If it comes with a demonstration of how the money stays together in three bundles but also separates from the other 97 bundles, I'll take a look too.
Let me reply here to Chaucer's post, quoted above by Unsurelock, and see if I can offer at least a partial explanation as to how the money bundles may have arrived at Tena Bar.
Chaucer, I did not promise to provide "proof" that debris coming down the Columbia River from the Portland International Airport area "could not arrive at Tena Bar." No such "proof" exists. However, I did say and still say that such debris "would not" arrive at Tena Bar.
Debris coming down the Columbia River on the surface would end up on the Oregon side of the river after the river turned to the north. Debris coming down the river on the bottom would end up in the shipping channel which is also on the Oregon side of the river as it passes Tena Bar.
In reality, there is surprisingly little debris on Tena Bar. This is mostly such things as a few aluminum cans that were left by fishermen or that may have come from the Caterpillar Island marina that is just upstream (to the south) of Tena Bar. Keep your eyes open during Eric's videos and see how much debris you can spot.
This matter has been explained in more detail numerous times previously on this site and DZ.
Unsurelock, at this time everything is a "theory" as to how the money got to Tena Bar. I believe that it got there by natural means and without human intervention. Also, the three bundles, being almost touching each other, undoubtedly arrived at the same time. To do that, they would have to be in a damaged money bag or similar container and separated from the bag/container during a high water event since the money was found above the nominal river water level.
Working backward, the money bag and probably whatever was left of Cooper started at a higher elevation with no floating capability at that time and traveled on the bottom to where they got hung up for a short time, with the three bundles separating at that point, and the rest going on downriver. Still working backward, this means that the money bag and other things were on dry land prior to the high water event that moved them downstream. All of this implies that Cooper was a no-pull, landed on solid ground just a few feet above and near the river water, and stayed there for some period of time (at least a few months) before a high water event reached what was left of him.
Cooper's body would have decomposed by the time of the high water event and the damaged money container, as well as the parachutes, would have been through any number of wet/dry cycles from the rain in that location. The bills could have been damaged at that time by the repeated wet/dry cycles and not by rolling on the bottom while underwater. The river diatoms could have joined the bundles once they were out of the container.
The area where Cooper could have landed as a no-pull is small, quite a bit less than a one-half square mile, for things to happen as described above. This has been discussed in much more detail previously on this site and DZ.