JD from Shawnee, KS on 6/30/2023 9:57:02 AM:
Two of the pictographs in question were still there in 2010 when I rode the KATY often, then. Yet, they were small and hard to find visually.
Recently, however, on June 29th, 2023, I rode the Rochport/Huntsdale section to discover these pictographs no longer exist. To me it looks like large slap-layers of rock from the face of this bluff have fallen. The face of this bluff no longer looks like it did 13-years ago.
Probably a combination of fading paint and fallen rock caused their demise.