Figure 9 A-C shows the beginning, ending, and change in topography respectively for a small reach of meandering river at 234-235 rkm.
This reach lies within the historically active spawning reach.
Note that there is generalized scour of approximately 1 meter as shown by the negative change in elevation on Figure 9C throughout the outside of the meander bend and more locally extensive scour of up to approximately 3 meters near the apex of the meander bend.
Based on the core records as shown in Figure 5 the scour would be sufficient to at least partially expose some buried gravel and cobble.