Georger and Snowmman were exploring a money deposit from upstream at DZ, but they didn't know about the Sauvie Island 200,000 Cu/yards of dredge material across the river and just upstream from TBAR.
The bottom is smooth, the river runs fast at Sauvie then curves North dumping debri on TBAR.
Georger said...
"At the same time I keep hearing all these reports of lots of debris at Tina Bar! If that is the case then
there may be a stronger higher volume inside flow than I think.
The only assumed facts I have are from hydrologist
Jeffrey Bradley's report.
Ckret always contended if the money broke free
and went down the main channel then this happened shortly before the discovery in Feb of 1980. 1979
was a very dry year, no floods then. Almost the same for 78. I have the facts to prove that. Then
there was a flood Dec 2 of 1977.
Ckret based his theory on the Bradeley's report, who cites the Dec 2, 1977 flood (Washougal and Columbia basin) as the likely time the money entered the Columbia. Bradley estimated a 3 feet/sec flow rate for the Columbia during the
Dec 2nd flood. He estimates the distance the
money traveled (from a Washougal entry point)
as approx 30 miles of uninterupted travel time of 14.7 hrs to Tina Bar. Bradley doesnt say one thing in his report to clarify flow patterms or any other
hydrological factor which would bring the money to Tina Bar out of the main channel.
If we had some concrete idea how and from where,
debris gets brought to Tina Bar and the rate of deposit, not just in flood but also during ordinary flow situations; then I think we would have some basis for estimating the meander effect you think applies post-curve in this area.
I will say this: if your theory is correct and the
money got to T-Bar via the Columbia main channel,
then the next question is "from where" and "when".
If Meander is the "means" of conveyance to T-Bar
then we are almost obliged to attach: via the main
channel. If the Main Channel is the route, then from
where and when? The money almost had to be hung up somewhere between 71 and 77, at least ?
G. "
FLYJACK "From Sauvie Island dredge deposit in 1976/77"
.