btw- I cross referenced a number of the "Source" notes in Bea's report to the "other forum". I couldn't find any of these exact images in the "other forum" (except discussion & pic of postcard - see note1 below).
note: All of my original images are in upthread posts (if anyone wants to confirm this independently).
Note1: On the last image, I had researched data to come to the conclusion that there was a natural "percolation seam" in a pre-pour gravel/aggregate bed in the spillway. Although other forums turned out to be discussing this item, I came to the conclusion of a natural percolation seam issue from special image processing to filter the "texture dots" out of the postcard image. (my image stated note: "Diagonal subsurface percolation "seam" (waterflow left to right, per grade elevation slope)". Bea's report has "Water percolation across spillway subgrade"). This image, from Bea's report is the only one not directly lifted. However, the very important critical conclusions of a gravel/aggregate bed (before the slab pours) & a water percolation seam was concluded in Bea's image note & also a critical reference of an erodible gravel bed underneath the spillway slabs (first pages of report). I have not seen this conclusion anywhere except in Bea's report. I also noted that Bea's report was unable to note the other Natural water table percolation from the hillside originating close to the upper spillway. To show this long downhill flow, image processing and filtering would have been required - OR - directly lifting my image.
Compare these images: EarthResearcher333 originals to left vs Robert Bea's report on the right.
https://www.documentcloud.org/documents/3676605-Robert-Bea-Oroville-Spillway-Failure-Root-Cause.html
