There is a rational explanation for all of this, apparently, conflicting information.
OK. You may recall in an earlier post (Page 343, Reply #5144) that I stated that Tena Bar had had seven high-water events—defined as water levels that would reach the money find spot per 1980 standards—between June 1950 (approx. time Fazio’s purchased the property) and February 1980 (when the money was found). And, that only two of these seven high-water events occurred between the date of the skyjacking and the money find—May/June ’72 and ’74.
Additionally, in the same post I noted that, “there’s a catch.”
More to the point, that in July of 1968 the money find spot was also underwater, even though the water level was not overly high. I speculated that this indicated that dredge spoils had been placed on or near the money find spot after July 1968, but before November 1971—I’m sure there is a way to verify this.
Perhaps what we have is a situation where dredge spoils were placed upon Tena Bar either very near the money find spot or on top of it, however, BEFORE November 1971.
Perhaps Palmer’s mistake was assuming that these spoils came from the August 1974 dredge.
So, for example, if there was a dredging operation in 1970 at the money find spot, these spoils would still largely be intact because there wouldn’t have been enough high-water events or time for them to erode by 1980. Meaning, Palmer may have been seeing the theoretical 1970 dredge spoils.